Work vehicle
AssigneeKubota Corporation
InventorsToshifumi Yasuda, Akihiro Takami
Life of this patent
Estimating the term…
Abstract
A diff-lock operation shaft 50 is supported by a case 11 in such a manner as to be rotatable around an axis P1 of the diff-lock operation shaft 50 and operates a diff-lock section 48 to a lock position A2 by being rotated, and a first coil spring 51 is wound around the outer surface of the diff-lock operation shaft 50 concentrically with the diff-lock operation shaft 50, and is linked at one end portion 51b to the diff-lock operation shaft 50 and at another end portion 51a to linking members 55 and 56. The first coil spring 51 is twisted around the axis P1 via the linking members 55 and 56 by the manual operation tool 58 being operated, and the diff-lock operation shaft 50 is rotated via the first coil spring 51.
Claims4
A work vehicle comprising:
- right and left travel devices;
- a differential configured to distribute power from a motor section to the right and left travel devices;
- a diff-lock section operable to an operating position in which the differential is operational and a diff-lock position in which the differential is locked;
- a diff-lock device configured to operate the diff-lock section to the operating position and the diff-lock position;
- a case housing the differential, the diff-lock section and the diff-lock device;
- a diff-lock operation tool configured to be manually operated;
- a linking member connected between the diff-lock device and the diff-lock operation tool,
- a parking brake provided in a transmission system from the motor section to the differential;
- a brake operation tool configured to operate the parking brake to a braking state by being manually operated and
- a flexible spring connected between the linking member and the brake operation tool,
- wherein-the diff-lock device includes:
- a diff-lock operation shaft supported by the case in such a manner as to be rotatable around an axis of the diff-lock operation shaft, and configured to operate the diff-lock section to the diff-lock position by being rotated;
- and
- a first coil spring wound around an outer surface of the diff-lock operation shaft concentrically with the diff-lock operation shaft, and linked at one end portion to the diff-lock operation shaft and at another end portion to the linking member, and
- the first coil spring is wound around the outer surface of a portion of the diff-lock operation shaft protruding externally from the case,
- the one end portion and the other end portion of the first coil spring are respectively linked to the diff-lock operation shaft, outside the case,
- due to the diff-lock operation tool being operated, the first coil spring is twisted around the axis via the linking member, and the diff-lock operation shaft is rotated via the first coil spring, and
- due to the brake operation tool being operated, the first coil spring is twisted around the axis via the flexible spring and the linking member, and the diff-lock operation shaft is rotated via the first coil spring.
Dependencies are inferred from the claim text.