Patent ID: 8881883
Filing Date: 2014-11-11
Classification: B60T,F16H,Y10T

Abstract:
1. A park lock device of a narrow transmission, comprising: a park gear provided in a transmission case at a rotational axis which rotates together with a wheel axle; a park pawl provided in the transmission case so as to rotate about a pawl shaft coupled to a proximal end of said park pawl, said park pawl having a pawl portion at a distal end which locks said park gear through an engagement therebetween wherein said park pawl further includes a body portion coupling said proximal end to said distal end and a cam contact portion at said distal end opposing said pawl portion; a park rod provided in the transmission case so as to move together with an operation of a controller, said park rod having a cam portion which presses said cam contact portion of said park pawl so as to make said engagement between said pawl portion of said park pawl and said park gear according to said operation of said controller; a park sleeve receiving said cam portion of said park rod and defining a first contact point providing a reactive force to said cam contact portion of said park pawl pressing against said cam portion of said park rod at a second contact point; a pawl torsional spring, coupled to said pawl shaft, biasing a rotation of said park pawl about said pawl shaft towards a disengagement of said park gear and said pawl portion to unlock said park gear; and a pawl stopper provided in said transmission case to limit said rotation of said park pawl by contacting said body portion of said park pawl; wherein motion of said park gear, said park pawl, and said park rod are all constrained within a same vertical plane of said transmission case.