{"id":572,"date":"2023-11-22T17:41:47","date_gmt":"2023-11-22T16:41:47","guid":{"rendered":"https:\/\/gearupmech.com\/transmissions-with-hsg-gears\/"},"modified":"2024-07-16T20:36:56","modified_gmt":"2024-07-16T19:36:56","slug":"transmissions-with-hsg-gears","status":"publish","type":"page","link":"https:\/\/gearupmech.com\/en\/transmissions-with-hsg-gears\/","title":{"rendered":"Transmissions with HSG gears"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"572\" class=\"elementor elementor-572 elementor-143\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-54a1be6 e-flex e-con-boxed e-con e-parent\" data-id=\"54a1be6\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4853968 elementor-widget elementor-widget-spacer\" data-id=\"4853968\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a23569 elementor-widget elementor-widget-breadcrumbs\" data-id=\"6a23569\" data-element_type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<nav aria-label=\"breadcrumbs\" class=\"rank-math-breadcrumb\"><p><span class=\"last\">Home<\/span><\/p><\/nav>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5f9db28 elementor-widget-divider--view-line_text elementor-widget-divider--element-align-right elementor-widget elementor-widget-divider\" data-id=\"5f9db28\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t\t<span class=\"elementor-divider__text elementor-divider__element\">\n\t\t\t\tOur services\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d805b79 elementor-widget elementor-widget-heading\" data-id=\"d805b79\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Transmissions with HSG gears<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d0bf84a elementor-widget elementor-widget-text-editor\" data-id=\"d0bf84a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The codification of a new theory for the design of special gears that takes into account not only the design but also technological problems is necessary to achieve the project objective, relating to the design, construction and testing of an innovative GearBox characterized by involute toothing medium and high flow. In one of the bibliographical works produced by the founding members of the Startup, the general theory underlying the design of cylindrical gears with medium and high-sliding involute teeth, indicated with the acronym HSG (High Sliding Gears), was exposed, entitled: &#8221; Theoretical foundations for the design of cylindrical gears with medium and high slip involute teeth&#8221; published by Liguori editore (2022).<\/p>\n<p>Thanks to the experience and skills of the internal working groups, which are formed from time to time based on specific technical needs, GearUp is able to propose the most suitable solutions to achieve the company&#8217;s innovative technical objectives within the expected timescales. Furthermore, the company offers the customer the possibility of establishing technical collaborations with universities and public research bodies, aimed at integrating skills for study and experimentation phases not present in GearUp.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9a9f2b5 elementor-widget elementor-widget-heading\" data-id=\"9a9f2b5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is meant by a high slip gear (HSG)?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c87b533 e-flex e-con-boxed e-con e-child\" data-id=\"c87b533\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e91bdc1 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"e91bdc1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The theory behind high sliding gear (HSG) allows a general mathematical formulation of any gear and in particular of those to be used in pairs for the transmission of motion between parallel shafts. The HSG theory, while including traditional design methods, allows the transmission of motion between two cylindrical gear wheels to be customized, allowing the creation of high transmission ratios with limited wheelbases. Furthermore, with the same transmitted power it is possible to reduce the total number of teeth to the advantage of overall compactness, managing to reduce both the weight and the total size. Therefore, the theory behind HSG gears enables a new concept of parallel shaft gears with high gear ratios that are simultaneously light, strong, silent, efficient and safe.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8510d0d elementor-widget elementor-widget-image\" data-id=\"8510d0d\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/Assieme.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Assieme\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTA4LCJ1cmwiOiJodHRwczpcL1wvZ2VhcnVwbWVjaC5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjNcLzExXC9Bc3NpZW1lLmpwZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/Assieme.jpg\" title=\"Assieme\" alt=\"Assieme\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-42fe93a elementor-widget elementor-widget-heading\" data-id=\"42fe93a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why choose an HSG gear?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8756e86 elementor-widget elementor-widget-text-editor\" data-id=\"8756e86\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Among the main mechanical characteristics of HSG gears there is undoubtedly robustness, as the design of a tooth (obtained with the proposed theory) is similar to that of a shelf fitted to the base with a profile such as to provide uniform resistance Figure 1(c). To approach the characteristics of uniform resistance, the tooth of a conventional wheel would require larger dimensions, but this need is compromised by the minimum number of teeth which cannot decrease very much without encountering a notch at the base of the tooth Figure 1(a). In fact, in modular proportioning (example ISO 53) a method is proposed for calculating the minimum number of teeth such as to avoid the &#8220;under-cut&#8221; (notch at the base), which often causes breakages in Figure 1(b). Furthermore, the design of the profile of an HSG tooth allows, in addition to approaching uniform resistance with respect to bending stresses, and avoiding the concentration of stresses produced by the notch at the base (which the ordinary &#8220;modular&#8221; theory would produce), to increase the resistance against the &#8220;pitting&#8221; phenomenon (damage and surface wear) is significantly increased, as the increase in the radius of relative curvature between the profiles in contact leads to a notable reduction in the Hertzian stress.<\/p>\n<p>Thanks to the experience and skills of the internal working groups, which are formed from time to time based on specific technical needs, GearUp is able to propose the most suitable solutions to achieve the company&#8217;s innovative technical objectives within the expected timescales. Furthermore, the company offers the customer the possibility of establishing technical collaborations with universities and public research bodies, aimed at integrating skills for study and experimentation phases not present in GearUp.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-80da1d6 e-grid e-con-boxed e-con e-child\" data-id=\"80da1d6\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-93f5cb3 e-flex e-con-boxed e-con e-child\" data-id=\"93f5cb3\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-51ebf51 elementor-widget elementor-widget-image\" data-id=\"51ebf51\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"264\" height=\"215\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/Intaglio-alla-base.jpg\" class=\"attachment-full size-full wp-image-497\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aa8aeb6 elementor-widget elementor-widget-text-editor\" data-id=\"aa8aeb6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>(a)<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ae5ab48 e-flex e-con-boxed e-con e-child\" data-id=\"ae5ab48\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c3c2b5d elementor-widget elementor-widget-image\" data-id=\"c3c2b5d\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"294\" height=\"215\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/senza-intaglio-alla-base.jpg\" class=\"attachment-large size-large wp-image-498\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e1d1c7 elementor-widget elementor-widget-text-editor\" data-id=\"3e1d1c7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>(b)<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9076d72 e-flex e-con-boxed e-con e-child\" data-id=\"9076d72\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c8613b9 elementor-widget elementor-widget-image\" data-id=\"c8613b9\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"309\" height=\"215\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/teoria-HSG.jpg\" class=\"attachment-large size-large wp-image-499\" alt=\"\" srcset=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/teoria-HSG.jpg 309w, https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/teoria-HSG-300x209.jpg 300w\" sizes=\"(max-width: 309px) 100vw, 309px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-58146e7 elementor-widget elementor-widget-text-editor\" data-id=\"58146e7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>(c)<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-06119cf elementor-widget elementor-widget-text-editor\" data-id=\"06119cf\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><strong>Picture 1: schematization of the profile of a tooth (with the same module) in the following configurations (a) with notch at the base, (b) without notch at the base, (c) HSG theory.<\/strong><\/em><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f6fb2b1 elementor-widget elementor-widget-heading\" data-id=\"f6fb2b1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How are HSG gears lubricated?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-201061a elementor-widget elementor-widget-text-editor\" data-id=\"201061a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>An equally important feature of HSG gears that differentiate them from all traditional gears concerns the motion transmission. In fact, the conjugated surfaces have a unidirectional relative (or sliding) speed. This is achieved by avoiding the reversal of the motion at the primitive point (Figure 2(a)) by imposing the contact segment entirely in the recess arc. Depending on whether the contact segment starts from the primitive point or deviates from it to a greater or lesser extent, we have <em>all-addendum<\/em> or <em>long-addendum<\/em> type teeth Figure 2(b). The unidirectionality of the relative motion between the conjugated profiles entails certain benefits on the lubrication regime that can be established between them, which can become hydrodynamic, a regime that is certainly favored by the increase in the relative curvature as one moves away from the original point .<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9c43614 e-grid e-con-boxed e-con e-child\" data-id=\"9c43614\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-03f6015 e-flex e-con-boxed e-con e-child\" data-id=\"03f6015\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-366f7a7 elementor-widget elementor-widget-image\" data-id=\"366f7a7\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva3.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Diapositiva3\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTM5MSwidXJsIjoiaHR0cHM6XC9cL2dlYXJ1cG1lY2guY29tXC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wN1wvRGlhcG9zaXRpdmEzLmpwZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"790\" height=\"480\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva3.jpg\" class=\"attachment-large size-large wp-image-1391\" alt=\"\" srcset=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva3.jpg 790w, https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva3-300x182.jpg 300w, https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva3-768x467.jpg 768w\" sizes=\"(max-width: 790px) 100vw, 790px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aefba78 elementor-widget elementor-widget-text-editor\" data-id=\"aefba78\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>(a)<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-039293c e-flex e-con-boxed e-con e-child\" data-id=\"039293c\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3d554c6 elementor-widget elementor-widget-image\" data-id=\"3d554c6\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva5.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Diapositiva5\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTM5NywidXJsIjoiaHR0cHM6XC9cL2dlYXJ1cG1lY2guY29tXC93cC1jb250ZW50XC91cGxvYWRzXC8yMDI0XC8wN1wvRGlhcG9zaXRpdmE1LmpwZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"817\" height=\"483\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva5.jpg\" class=\"attachment-large size-large wp-image-1397\" alt=\"\" srcset=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva5.jpg 817w, https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva5-300x177.jpg 300w, https:\/\/gearupmech.com\/wp-content\/uploads\/2024\/07\/Diapositiva5-768x454.jpg 768w\" sizes=\"(max-width: 817px) 100vw, 817px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a3a637 elementor-widget elementor-widget-text-editor\" data-id=\"1a3a637\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>(b)<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-caa1ea4 elementor-widget elementor-widget-text-editor\" data-id=\"caa1ea4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><strong>Figure 2: Butterfly diagram of the sliding speeds between the contacting profiles, (a) conventional dentition, (b) HSG all-addendum dentition.<\/strong><\/em><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-156370f elementor-widget elementor-widget-heading\" data-id=\"156370f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How loud are HSG gears?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-02c9dca elementor-widget elementor-widget-text-editor\" data-id=\"02c9dca\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Another feature that positively distinguishes HSG gears is their silence. In fact, the noise of a gear is mainly attributable to the fluctuation of the load between the teeth, depending on variations in load (torque), unbalance of the rotating masses, construction errors. It is demonstrated that the sharpness of the noise is proportional to the number of teeth and to the square of the peripheral speed of the base circumferences. In conventional gears the techniques used to reduce noise are: use of helical toothing, reduction of the unbalance of the rotating masses, accurate control of the pitch and surface finish of the toothing. In HSGs, silence improves with interventions not permitted by traditional theory, i.e.:<\/p>\n<ul>\n<li>Reductions in the radial dimensions of the pairs making up the gear. These allow the peripheral speed of the base circumferences and the inertia of the rotating masses to be reduced;<\/li>\n<li>Reduction in the number and height of teeth;<\/li>\n<li>Use of strongly inclined helical or bi-helical teeth.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c030b5 elementor-widget elementor-widget-heading\" data-id=\"2c030b5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is the maximum gear ratio of HSG gears?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0b416c3 e-flex e-con-boxed e-con e-child\" data-id=\"0b416c3\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5068472 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"5068472\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In HSG gearboxes it is possible to make significant changes to the transmission ratio without changing the wheelbase. In Figure 3, the same driven wheel with 32 teeth can be coupled to a driving wheel with 1, 2 or 3 teeth without having to change the wheelbase and with transmission ratios of approximately 32, 16 and 10.66 respectively. The versatility of use of HSG gears therefore allows you to change the transmission ratio simply by replacing a pinion without making changes to the wheelbase; an impracticable condition for modular gears as a variation in the transmission ratio of a pair of traditional gears imposes stringent constraints essentially linked to modularity and therefore a necessary modification of the wheelbase.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a830a90 e-flex e-con-boxed e-con e-child\" data-id=\"a830a90\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d70aff2 elementor-widget elementor-widget-video\" data-id=\"d70aff2\" data-element_type=\"widget\" data-settings=\"{&quot;video_type&quot;:&quot;hosted&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;loop&quot;:&quot;yes&quot;,&quot;play_on_mobile&quot;:&quot;yes&quot;,&quot;mute&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"e-hosted-video elementor-wrapper elementor-open-inline\">\n\t\t\t\t\t<video class=\"elementor-video\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/movie004.m4v\" autoplay=\"\" loop=\"\" muted=\"muted\" playsinline=\"\" controlsList=\"nodownload\"><\/video>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1c9e797 elementor-widget elementor-widget-text-editor\" data-id=\"1c9e797\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><strong>Figure 3: Example of three long-addendum gearboxes made with the same center wheel and wheelbase. In this example, the central wheel has 32 teeth, while the three sprockets have 1, 2 and 3 teeth respectively.<\/strong><\/em><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1b2a63d e-flex e-con-boxed e-con e-child\" data-id=\"1b2a63d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ab11b9a elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"ab11b9a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Among the main peculiarities of HSG gears is undoubtedly linked to the possibility of creating high transmission ratios with small wheelbases. This characteristic, if extended to gear trains, allows the creation of very compact and light groups with high overall efficiency. Figure 4 shows a conceptual comparison between a naval gear system made up of three speed jumps (on the left) with an equivalent HSG gear system made up of two speed jumps (on the right) and the same overall ratio (100:1), all with the same transmitted power and the same input and output shafts from the groups. The reduction in overall mass and size is evident.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c24bf8e e-flex e-con-boxed e-con e-child\" data-id=\"c24bf8e\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4549865 elementor-widget elementor-widget-image\" data-id=\"4549865\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/Confronto.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Confronto\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTAyLCJ1cmwiOiJodHRwczpcL1wvZ2VhcnVwbWVjaC5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjNcLzExXC9Db25mcm9udG8uanBnIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"483\" height=\"265\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/Confronto.jpg\" class=\"attachment-large size-large wp-image-502\" alt=\"\" srcset=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/Confronto.jpg 483w, https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/Confronto-300x165.jpg 300w\" sizes=\"(max-width: 483px) 100vw, 483px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7077cfe elementor-widget elementor-widget-text-editor\" data-id=\"7077cfe\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><strong>Figure 4: Comparison between a naval gear system consisting of three speed steps (left) with an equivalent HSG gear system consisting of two speed steps (right) and the same overall ratio (100:1).<\/strong><\/em><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57ac5d0 elementor-widget elementor-widget-heading\" data-id=\"57ac5d0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Can HSG gears be irreversible?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87efe49 elementor-widget elementor-widget-text-editor\" data-id=\"87efe49\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Irreversibility between parallel shafts is not contemplated in traditional theory and it is not possible to obtain a high efficiency for orthogonal shaft pairs (screw-companion wheel) characterized by irreversibility. In the HSG theory, the vectorial decomposition of the force transmitted in the conjugated pair is exploited and not the pure sliding contact (as happens instead in the case of the conventional gearbox Figure 5 (a)), therefore, when the function of each wheel is exchanged from driving to moving and vice versa, the active component of the transmitted force makes movement impossible. Picture 5 (b) shows an example of an irreversible bi-helical couple with parallel shafts, with a transmission ratio equal to 30, whose efficiency in direct motion exceeds 80% compared to a traditional screw-companion wheel reducer with orthogonal shafts, whose efficiency would not exceed 50%, with the same dimensions and transmission ratios. <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-42af140 e-grid e-con-boxed e-con e-child\" data-id=\"42af140\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-e55245e e-flex e-con-boxed e-con e-child\" data-id=\"e55245e\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-46c99dc elementor-widget elementor-widget-image\" data-id=\"46c99dc\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/riduttore-convenzionale.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"riduttore convenzionale\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTA1LCJ1cmwiOiJodHRwczpcL1wvZ2VhcnVwbWVjaC5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjNcLzExXC9yaWR1dHRvcmUtY29udmVuemlvbmFsZS5qcGcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"210\" height=\"260\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/riduttore-convenzionale.jpg\" class=\"attachment-full size-full wp-image-505\" alt=\"\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89ef3c5 elementor-widget elementor-widget-text-editor\" data-id=\"89ef3c5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>(a)<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c9ba820 e-flex e-con-boxed e-con e-child\" data-id=\"c9ba820\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7388505 elementor-widget elementor-widget-image\" data-id=\"7388505\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/riduttore-HSG.webp\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"riduttore HSG\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTAzLCJ1cmwiOiJodHRwczpcL1wvZ2VhcnVwbWVjaC5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjNcLzExXC9yaWR1dHRvcmUtSFNHLndlYnAifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"740\" height=\"490\" src=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/riduttore-HSG.webp\" class=\"attachment-large size-large wp-image-503\" alt=\"\" srcset=\"https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/riduttore-HSG.webp 740w, https:\/\/gearupmech.com\/wp-content\/uploads\/2023\/11\/riduttore-HSG-300x199.webp 300w\" sizes=\"(max-width: 740px) 100vw, 740px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e9cf8c6 elementor-widget elementor-widget-text-editor\" data-id=\"e9cf8c6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>(b)<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9360b7a elementor-widget elementor-widget-text-editor\" data-id=\"9360b7a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><strong>Picture 5: (a) Representation of a conventional worm gear reducer with irreversible orthogonal axes companion wheel, 50% efficiency; (b) Representation of an HSG worm gearbox with irreversible companion wheel with parallel axes, 80% efficiency.<\/strong><\/em><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-069aca7 elementor-widget elementor-widget-spacer\" data-id=\"069aca7\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Home Our services Transmissions with HSG gears The codification of a new theory for the design of special gears that takes into account not only the design but also technological problems is necessary to achieve the project objective, relating to the design, construction and testing of an innovative GearBox characterized by involute toothing medium and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-572","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/gearupmech.com\/en\/wp-json\/wp\/v2\/pages\/572","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gearupmech.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/gearupmech.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/gearupmech.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gearupmech.com\/en\/wp-json\/wp\/v2\/comments?post=572"}],"version-history":[{"count":10,"href":"https:\/\/gearupmech.com\/en\/wp-json\/wp\/v2\/pages\/572\/revisions"}],"predecessor-version":[{"id":1401,"href":"https:\/\/gearupmech.com\/en\/wp-json\/wp\/v2\/pages\/572\/revisions\/1401"}],"wp:attachment":[{"href":"https:\/\/gearupmech.com\/en\/wp-json\/wp\/v2\/media?parent=572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}