Work Vehicle Having Hydraulic Appratus
AssigneeKubota Corporation
InventorHisashi Tsukatani
Life of this patent
Estimating the term…
Abstract
Disclosed is a work vehicle having a hydraulic apparatus which can reliably prevent erroneous operation of the valve of the hydraulic apparatus even when the operating lever is moved inadvertently. With this hydraulic apparatus, with operations of a single operating lever in two directions, two valves are operated respectively. Two valve operating links for operating the two valves respectively are pivotally supported to a support shaft provided to a pair of frame plates and a lock pin is provided to the frame plates. The two valve operating links form pin holes. When the two valves are at the neutral positions, the lock pin is inserted into the pin holes with a locking operation of a lock operating tool, thus fixing the valve operating links and locking the valves.
Claims5
A work vehicle having a hydraulic apparatus, comprising:
- a single operating lever;
- a first valve operable by an operation of the operating lever in a first direction;
- a second valve operable by an operation of the operating lever in a second direction intersecting the first direction;
- a first valve operating link pivotally supported to a support shaft of the operating lever, the first valve operating link supplying/draining pressure oil to/from a first hydraulic unit via the first valve;
- a second valve operating link pivotally supported to the support shaft of the operating lever, the second valve operating link supplying/draining pressure oil to/from a second hydraulic unit via the second valve;
- a pair of frame plates disposed in opposition to each other across the first and second valve operating links therebetween;
- and
- a boss portion supported by the pair of frame plates and supporting the support shaft of the operating lever;
- wherein:
- the pair of frame plates include a lock pin;
- the first valve operating link defines a first pin hole;
- the second valve operating link defines a second pin hole;
- and
- when the first valve and the second valve are located at neutral positions thereof, the first and second valve operating links are fixed to lock the first and second valves by inserting the lock pin into the respective pin holes.
A work vehicle having a hydraulic apparatus, comprising:
- a single operating lever;
- a first valve operable by an operation of the operating lever in a first direction;
- a second valve operable by an operation of the operating lever in a second direction intersecting the first direction;
- a locking mechanism for locking the operating lever at a neutral position thereof, the locking mechanism including:
- a concave member attached to one of a movable support portion and a base portion of the operating lever, the concave member defining a concave portion at an end thereof;
- a clamping member attached to the other of the movable support portion and the base portion of the operating lever for clamping the concave member, the clamping member including a pin engageable with the concave portion;
- wherein, when the operating lever is at the neutral position, the operating lever is locked to be immovable in the first or second direction by moving the support portion to cause the clamping member to clamp the concave member and also to cause the pin to engage the concave portion.
Dependencies are inferred from the claim text.