Parking mechanism of a transmission
AssigneesAisin Seiki Kabushiki Kaisha, Aisin-Warner Kabushiki Kaisha
InventorsTsunehiko Ogasawara, Koji Sumiya
Life of this patent
Estimating the term…
Abstract
An end of a shaft member which is displaced and actuated in conjunction with a shift lever of a transmission presses and displaces a latch which is arranged in such a way as to be able to be displaced in an opposing direction against a cam surface of a cam which is formed on a fixed member to function like a wedge which wedges itself between said cam surface and latch, thereby making the latch engage teeth which are drivingly coupled to an output shaft of the transmission in a parking mechanism of a transmission. A cylindrical support portion is continuously extended from the cam surface so as to guide the end of the shaft member at the time when the end of the shaft member is disengaged from the area between the cam surface and latch.
Claims17
A parking mechanism of a transmission comprising:
- a latch displaceable to engage and disengage with teeth which are operatively coupled to an output shaft of the transmission;
- a cam surface formed on an inner surface of a stationary sleeve;
- a shaft member having a working portion engageably and disengageably disposed with respect to said cam surface, said shaft member displaceable axially in cooperation with a shift lever of the transmission so as to displace the working portion of said shaft member engagingly and disengagingly with said cam surface;
- means for mounting said latch with a portion of said latch positioned relative to said cam surface so that engagement and disengagement of said working portion with said cam surface causes said latch to engage and disengage with said teeth, whereby the movement of said shaft member to engage said working portion with said cam surface produces a wedging action displacing the latch in a direction to engage itself with said teeth;
- and
- a cylindrical guide portion formed on an inner surface of said sleeve continuously extending from said cam surface for guiding said working portion of said shaft member when the working portion of the shaft member is disengaged from said cam surface;
- wherein said cam surface and said cylindrical guide portion are made of an integral body.
Dependencies are inferred from the claim text.