Patent ID: 6056660
Filing Date: 2000-05-02
Classification: B60K,F16H

Abstract:
A differential gear having an input side rotary member for receiving an external driving force, first and second output side rotary members for respectively driving a left driving wheel and a right driving wheel and arranged coaxially with a rotational axis of the input side rotary member, and a gear body for supporting the input side rotary member and the output side rotary members in a freely rolling manner, with a rotational force of the input side rotary member being transmitted to the output side rotary members while permitting a difference in speed of rotation between the output side rotary members, said differential gear comprising:a first input side gear disposed on said input side rotary member at one end thereof in an axial direction, said first input side gear jointly rotatable with said input side rotary member;a second input side gear disposed on said input side rotary member at said one end thereof in the axial direction, said second input side gear jointly rotatable with said input side rotary member;a first output side gear having a different deceleration ratio relative to said first input side gear, said first output side gear jointly rotatable with one of said output side rotary members;a second output side gear having a different deceleration ratio relative to said second input side gear, said second output side gear rotatable coaxially with one of said output side rotary members;at least one first planetary gear meshing with said first input side gear and said first output side gear;at least one second planetary gear meshing with said second input side gear and said second output side gear;a support member for supporting said first planetary gear and said second planetary gear to be able to rotate coaxially on their own axes and to revolve around the rotational axis of said input side rotary member;first rotation controlling means for controlling with an arbitrary controlling force a rotation of said support member around the rotational axis of said input side rotary member to thereby arbitrarily control a rotational difference between the left and the right driving wheels by restricting with the arbitrary controlling force the rotation of the support member; andsecond rotation controlling means for controlling with an arbitrary controlling force a rotation of said second output side gear to thereby arbitrarily control the rotational difference between the left and the right driving wheels by restricting with the arbitrary controlling force the rotation of the second output side gear.