JPH0656170U - Position adjustment device for operating lever in work vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] It enables fine adjustment of the lever position that can correspond to the operator's physique and tastes, and greatly contributes to the improvement of operability. [Configuration] Movable cover 5a to which the operating lever 7 is assembled
Is connected to the fixed cover 5b via a ball joint so that the position of the operation lever can be adjusted steplessly in any arbitrary direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a position adjusting device for an operating lever in a traveling vehicle such as a hydraulic shovel.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, an operation lever for operating a work machine or the like is provided in an operation portion of a work vehicle of this type, and the position (including an angle) of the operation lever is determined by the operator's physique or preference. It is desirable to be able to adjust according to. Therefore, conventionally, there has been proposed one in which the position of the operation lever can be slid in the front-back direction and one in which the operation lever can be pivotally adjusted in the front-rear direction. In addition, since the adjustment pitches are preset in advance, it is not possible to closely correspond to the operator's physique and taste.

[0003]

[Means for Solving the Problems]

 The present invention was devised in view of the above circumstances to provide a position adjusting device for an operating lever in a traveling vehicle for work that can eliminate these drawbacks. The cover body located at the arbitrary rotation position is fixed to the universal joint portion while the cover body is connected to the machine body side through a universal joint that allows rotation in arbitrary multidirectional positions. It is characterized by the provision of a fixture. With this configuration, the present invention makes it possible to finely adjust the lever position that can correspond to the operator's physique and tastes, and greatly contribute to the improvement of operability.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a hydraulic shovel, which is connected to a crawler type traveling section 2, a swivel section 3 which is swivelly supported above the traveling section 2, and a front end section of the swivel section 3. Each of these parts is hydraulically actuated by the power of an engine (not shown) mounted on the rear part of the swivel part 3. It's coming.

Reference numeral 5 denotes an operation lever box disposed on the left and right of the upper surface of the revolving unit 3, that is, on both left and right sides of the driver's seat 6. The operation lever box 5 has a working unit 4 and the like at the front end thereof. An operation lever 7 for operating and a pilot valve 8 which is switched based on the operation of the operation lever 7 are assembled, but the operation lever box 5 of this embodiment has the operation lever 7 and the pilot valve 8 The movable cover 5a on the front side to be assembled and the fixed cover 5b on the rear side fixed to the machine body side are formed separately. Reference numeral 9 is a bellows-shaped tilt boot that connects the movable cover 5a and the fixed cover 5b, and 10 is a lever boot that covers the base end side of the operation lever 7.

Further, reference numerals 11 and 12 denote brackets provided at the rear end opening of the movable cover 5a and the front end opening of the fixed cover 5b, respectively. The brackets 11 and 12 are bolted to the inner surface of the cover. The pair of left and right fixed plates 11a, 12a and the horizontal stays 11b, 12b provided between the left and right fixed plates 11a, 12a are integrally welded to each other. Is provided with a vertical stay 12d having a ball 12c welded to the tip thereof, while the bracket 11 on the movable cover 5a side is provided with a pair of left and right ball receivers 11c for spherically supporting the ball 12c. A ball joint is formed between the movable cover 5a and the fixed cover 5b. That is, the movable cover 5a, to which the operation lever 7 is assembled, is connected to the fixed cover 5b via the ball joint, so that the position of the operation lever 7 can be rotationally adjusted to any multidirectional position. Is becoming possible.

By the way, one of the ball receivers 11c is fixedly supported by the fixed plate 11a via the stay 11d, while the other ball receiver 11c is supported by the lateral stay 11b so as to be movable left and right. 11e is integrally welded and is constantly urged toward the ball 12c side by the ammunition machine 13 interposed between the movable plate 11e and the fixed plate 11a. That is, the left and right ball receivers 11c hold the ball 12c elastically by the urging force of the ammunition 13 to temporarily hold the movable cover 5a at an arbitrary rotating position.

Further, 14 is a fixed handle provided on the outer side surface of the bracket 11, and a shaft portion 14a integrally projecting from the fixed handle 14 has a fixed plate 11a of the bracket 11 screwed into it. While penetrating, the tip end is fitted into the recess 11f formed in the movable plate 11e, and therefore, the ball receiver 11c on the movable side is pressed based on the screwing operation of the fixed handle 14. That is, when the fixed handle 14 is loosened, the above-described lever position adjustment is allowed, but when the fixed handle 14 is screwed in, the ball 12c is firmly sandwiched between the left and right ball receivers 11c to move. The rotation of the cover 5a is restricted. Reference numeral 15 is a disc spring for removing play, which is interposed between the fixed handle 14 and the bracket 11.

Further, reference numeral 16 is a level (an angle measuring instrument formed by enclosing liquid and bubbles in a transparent container) provided on the upper surface of the movable cover 5a. The adjustment angle is displayed based on the change in the bubble position. By adjusting the lever position while comparing the level 16 provided on the left and right movable covers 5a, the left and right lever positions are accurately matched. Makes it possible.

On the other hand, 17 is a hydraulic circuit of the hydraulic shovel 1, which includes a pump unit 18 having a plurality of hydraulic pumps P driven by the power of an engine, an arm cylinder 19 and a boom cylinder 20. , A bucket cylinder 21, a swing cylinder 22, a swing motor 23, left and right traveling motors 24, 25, and the like, a main control valve 26 for operating and controlling a frequently used hydraulic actuator, and an infrequently used blade cylinder 27 for controlling an operation. And a sub-control valve 28 that controls the shift of the traveling motors 24 and 25, and pilot valves 8L and 8R that pilot-operate the main control valve 26 (excluding the traveling motor valve) based on the operation of the left and right operating levers 7. And the main controller based on the operation of the left / right steering lever 29. The steering pilot valves 30L and 30R for pilot-operating the travel motor valve of the valve valve 26 are hydraulically connected to the oil tank 31 in which hydraulic oil is stored. An unload valve 33 that is switched based on the operation of the unload lever 32 is provided in the hydraulic pressure supply path extending to 8L, 8R, 30L, and 30R. The unloading valve 33 is in a load state in which the port P0 connected to the pump unit 18 is communicated with the ports P1 and P2 connected to the pilot valves 8L, 8R, 30L and 30R through the spool groove 33a, The port P0 is configured as a spool type valve that switches to an unloading state in which it communicates with a port T connected to the oil tank 31 via the spool groove 33a. Even in this state, the spool groove 33a for communicating the ports P1 and P2 with the port T is formed wide without closing the ports P1 and P2. That is, the unloading valve 33 prevents pressure from remaining in the pilot hydraulic pressure supply path 34 when the unloading lever 32 is accidentally operated while the operating lever 7 or the steering lever 29 is being operated. The inconvenience that the working unit 4 and the traveling unit 2 continue to move is eliminated based on the remaining pressure.

In the embodiment of the present invention configured as described above, when adjusting the positions of the operation levers 7 provided on the left and right sides of the driver's seat 6, the fixed handle 14 is loosened to operate the movable cover 5a. Is temporarily held. Then, after the movable cover 5a in the temporary holding state is rotated to an arbitrary position based on the rotation in multiple directions with the ball joint as a fulcrum, the fixed handle 14 is screwed into the operation lever. 7 can be fixed at a desired position according to the physique and preference of the operator. In other words, since it is possible to adjust the lever position in multi-directions and steplessly, it is possible to adjust the position of the operating lever 7 to the operator's physique and taste based on the fine adjustment of the lever position. As a result, the operability of the operating lever 7 can be greatly improved.

Moreover, since the left and right movable covers 5a are respectively provided with the spirit level 16, it is possible to easily and accurately match the left and right lever positions based on the spirit level 16, and therefore the left and right lever positions. It is possible to eliminate all the inconveniences that decrease the operability due to the variation of the.

Needless to say, the present invention is not limited to the above-mentioned embodiment, and the universal joint is not limited to a ball joint, for example. Further, in the above-mentioned embodiment, the lever position is adjusted only by turning around the ball joint as a fulcrum, but more detailed lever position adjustment is possible by combining with the slide position adjustment and turning position adjustment of the operation lever box. You can also do it.

[0014]

[Operation effect]

 In short, since the present invention is configured as described above, the operating lever position can be adjusted according to the operator's physique and preference, but the cover body to which the operating lever is assembled is Since it is connected to the machine body side through the universal joint, the operating lever can be adjusted to any desired multi-directional position, and the rotationally adjusted operating lever is a fixture provided at the universal joint site. Therefore, it will be fixed at any position. Therefore, the operation lever position is forcibly adjusted to the physique and preference of the operator by rough position adjustment, as in the conventional case where the adjustment direction is limited to one direction and the adjustment pitch is set in stages. Without making any adjustments, it is possible to closely adjust to the operator's physique and taste based on detailed position adjustment, which can greatly contribute to improving the operability of the operation lever.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic shovel.

FIG. 2 is a side view of an operation lever box.

FIG. 3 is a vertical sectional view of the same.

FIG. 4 is a hydraulic circuit diagram showing an overall configuration of a hydraulic mechanism.

FIG. 5 is a sectional view of a hydraulic valve.

FIG. 6 is a sectional view showing a conventional hydraulic valve.

[Explanation of symbols]

 1 hydraulic shovel 5 operation lever box 5a movable cover 5b fixed cover 7 operation lever 11c ball receiver 12c ball 14 fixed handle

Claims (1)

[Scope of utility model registration request] 1. A cover body to which an operation lever is assembled,
It is connected to the machine body side through a universal joint that allows rotation to arbitrary multi-directional positions, and a fixture for fixing the cover body located at the arbitrary rotational position is provided at the universal joint portion. A position adjusting device for an operating lever in a work vehicle.