Patent ID: 11951829
Assignee: MAZDA MOTOR CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A power transmission device, comprising:
a main drive wheel drive part configured to transmit power from a drive source to main drive wheels; and
an auxiliary drive wheel drive part having a power extraction part configured to extract from the main drive wheel drive part the power to be transmitted to auxiliary drive wheels, the power extraction part having a transfer gear set comprised of a transfer drive gear connected to the main drive wheel drive part, and a transfer driven gear meshing with the transfer drive gear and configured to transmit the power to the auxiliary drive wheels,
wherein, in a power transmission path from the main drive wheel drive part to the transfer drive gear, an input shaft connected to the main drive wheel drive part and a power transmission shaft connected to the transfer drive gear are coupled to each other in a radial direction through a first spline having a first backlash, and
wherein a first shear damper without backlash and a second shear damper provided with a second spline having a second backlash smaller than the first backlash are provided between the input shaft and the power transmission shaft.