Differential gear

F - Mech Eng,Light,Heat,Weapons – 16 – H

Patent

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F16H 48/12 (2006.01) B60K 17/16 (2006.01) F16H 13/04 (2006.01) F16H 13/08 (2006.01) F16H 48/00 (2006.01) F16H 48/14 (2006.01) F16H 48/20 (2006.01)

Patent

CA 2143925

A small, inexpensive, comparatively simple differential gear, having reliable revolution difference restricting effects includes a rotary casing and a retainer having a common rotation axis. Torque is transmitted to a groove of a pair of rotary members via rolling elements so the rotary members rotate with the casing. When a revolution difference occurs between the rotary members, rolling elements retained in guide slots of the retainer roll along the grooves of the rotary members so there is reciprocal movement within the range of the guide slots. When a force causing a revolution difference between the rotary members is applied from the side of only one of the rotary members, the resulting reaction force restricts the revolution difference between the pair of rotary members. This is because the rolling elements which come to the following side when the revolution difference exists trail the groove which comes to the leading side when a revolution difference occurs in response to their own movements. Reliable torque-sensitive revolution difference restricting effects are provided without a special mechanism to obtain a revolution difference restricting effect.

Engrenage différentiel de petite taille, peu coûteux, relativement simple et offrant des effets fiables restreignant la différence de rotation. Il comporte un carter rotatif et une bague de retenue ayant un axe de rotation commun. Le couple est transmis à la rainure d'une paire d'éléments rotatifs par le biais d'éléments roulants, de sorte que les éléments rotatifs tournent avec le carter. Lorsqu'une différence de rotation a lieu entre les éléments rotatifs, les éléments roulants retenus dans des fentes guides de la bague roulent le long des rainures des éléments rotatifs afin de créer un mouvement réciproque dans la portée des fentes guides. Lorsqu'une force causant une différence de rotation entre les éléments rotatifs est appliquée du côté d'un seul élément, la force de réaction résultante restreint la différence de rotation entre la paire d'éléments rotatifs. Cette situation est causée par les éléments roulants, arrivant du côté arrière lorsqu'une différence de rotation existe, qui suivent la rainure se plaçant du côté avant lorsqu'une différence de rotation s'effectue en raison de leur propre déplacement. Des effets restreignant la différence de rotation fiables et sensibles au couple sont prévus sans mécanisme spécial pour les obtenir.

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