JPH0673759A - Changeover device for control lever - Google Patents

Abstract

PURPOSE:To change over the operation patterns of left and right control levers installed to a construction equipment simply in a limited small space simply. CONSTITUTION:A plurality of hydraulic control valves 18a, 18b... and 18f, 18g... are mounted in parallel in two rows. A control-lever pivotally attached shaft 26 is set up in parallel with the array of the hydraulic control valves at the central section of both hydraulic control valves, and the control levers 32, 34, 36, 38 of each hydraulic control valve are connected. Operation fulcrum shafts 39, 40 are installed in parallel with the array of the hydraulic control valves at both ends of the control-lever pivotally attached shaft 26 respectively. The control-lever pivotally attached shaft 26 and each operation fulcrum shaft 39, 40 are connected by plates 57, 58, 59, 60, and each plate 57, 58, 59, 60 is formed detachably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching device for operating levers, and more particularly to switching of operating patterns of left and right operating levers provided on a construction machine.

[0002]

2. Description of the Related Art In construction machines such as power shovels, operating levers are provided at predetermined positions on the left and right sides so as to be freely rotatable in the cross direction in the front, rear, left and right directions. Then, in order to perform construction work by operating the bucket, boom, etc., the left and right operation levers are respectively rotated in predetermined directions, and the operation lever of the hydraulic control valve is pushed through the plates connected to the respective operation levers. Pull.

For example, if the left operation lever is rotated in the front-rear direction, the hydraulic control valve for pushing and pulling the arm is activated, and if the left operation lever is rotated in the left-right direction, the hydraulic control valve for turning the machine body. Works. On the other hand, if the right operation lever is rotated in the front-rear direction, the hydraulic control valve for raising and lowering the boom is activated, and if the right operation lever is rotated in the left-right direction, the hydraulic control valve for scooping the bucket is activated.

The operation patterns of the left and right operation levers are often set differently depending on the vehicle type. For example, when the left operation lever is rotated in the front-rear direction, a hydraulic control valve for turning the machine body is used. The operation pattern may be set so that the hydraulic control valve for pushing and pulling the arm is operated when the left operation lever is operated to rotate in the left-right direction.

[0005]

As described above, the left and right operation levers of the conventional construction machine of this type often have different operation patterns depending on the vehicle type. Therefore, when a person who is accustomed to the operation of the construction machine of one operation pattern operates the construction machine of the other operation pattern, the left and right operation levers are likely to be erroneously operated.

In a large-sized construction machine, there is also proposed a construction in which a pilot valve and a switching valve are provided in front of the hydraulic control valve so that the operating patterns of the left and right operating levers can be switched among a plurality of operating patterns. ing. However, the small-sized construction machine is not provided with the pilot valve and the switching valve as described above in terms of space and cost. Therefore, in order to enable the operation patterns of the left and right operation levers to be switched within a limited small space, and to simplify the configuration of the switching device so that the operation patterns of the operation levers can be easily and quickly switched. A technical problem to be solved arises, and an object of the present invention is to solve this problem.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and provides a construction machine equipped with left and right operation levers which can be freely rotated in forward, backward, leftward and rightward directions. A plurality of hydraulic control valves are installed in two rows in parallel, and a pivotal attachment part of the operating lever of each hydraulic control valve is provided in the central part in parallel with the plurality of hydraulic control valves. Provided is an operation lever switching device in which operation fulcrums of left and right operation levers are provided in parallel with a valve, and a plate which connects a pivotally attached portion of the operation lever and the operation fulcrum portion is detachably formed.

[0008]

According to the present invention, the pivoting portions of the operating levers for the respective hydraulic pressures and the operating fulcrums of the left and right operating levers are provided in parallel with the plurality of hydraulic control valves installed in two rows. The plate connected to the operation fulcrum portion of one operation lever and the pivotal attachment portion of the central operation lever is removed from one operation fulcrum portion and connected to the operation fulcrum portion of the other operation lever. At the same time, another plate connected to the operation fulcrum part of the other operation lever and the pivotal attachment part of the other operation lever in the central part is removed from the other operation fulcrum part to operate the one operation lever. Connect to the fulcrum.

Thus, the plates connected to the respective operation fulcrums of the left and right operation levers are replaced, and the position of the operating lever of the hydraulic control valve is changed when either operation lever is operated, so that the left and right operation levers are operated. The lever operation pattern can be switched.

[0010]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view of a micro excavator 11 as an example of a construction machine, including a lower frame (not shown).
Running bodies 12a, 12b such as crawlers are attached to the left and right sides of the upper frame, and an upper frame 14 is rotatably mounted on the lower frame via a turning device 13. An engine portion such as an engine is installed inside the rear portion of the upper frame 14, and a hydraulic excavator 15 is provided at the front portion of the upper frame 14. Further, various operation lever mechanisms 16 are projectingly provided on the upper surface of the front portion of the upper frame 14, and a seat 17 for an operator is fixedly mounted on the upper surface of the rear portion of the upper frame 14.

FIG. 2 is a front view of the upper frame 14 of the power shovel 11, in which the excavator 15 is omitted and the various operating lever mechanisms 16 and the plurality of hydraulic control valves 1 are shown.
8a, 18b ... Shows a connection configuration. Right operating lever 19 and front dozer operating lever 20 on the left side when viewed from the front
Is provided, the left operation lever 21 is provided on the right side in front view, and the traveling lever 22 is provided at the center. Right operating lever 19
The left operation lever 21 is rotatably supported in the front, rear, left, and right cross directions.

FIG. 3 is a plan view of the operating lever switching device. If described in combination with FIG. 2, a plurality of hydraulic control valves 1 will be described.
8a, 18b ... And 18f, 18g ... Are installed in parallel in two rows. On the left side of the figure, in front of the aircraft (direction of arrow A in FIG. 3)
From the inlet port 23 to the boom hydraulic control valve 1
8a, a hydraulic control valve 18b for bucket scooping, a spacer 24, a hydraulic control valve 18c for swinging the boom base, a hydraulic control valve 18d for driving one traveling body 12a, and a hydraulic control valve 18e for a dozer are provided in close contact with each other. Has been.

Further, on the right side of the drawing, from the front of the machine, an inlet port 25, a hydraulic control valve 18f for oil amount regeneration, a hydraulic control valve 18g for pushing and pulling the arm, and an upper frame 14 are sequentially installed.
Hydraulic control valve 18h for turning, hydraulic control valve 18i for option, hydraulic control valve 18j for driving the other traveling body 12b
Are closely attached. The hydraulic control valve 18a on the left side,
18b and 18c are offset to the front of the hydraulic control valves 18f, 18g, and 18h on the right side by the thickness of the spacer 24.

Thus, the hydraulic control valves 18a, 18b on the left side in the figure and the hydraulic control valve 18 on the right side in the figure installed in parallel in two rows.
An operating lever pivot shaft 26 is provided in parallel with each hydraulic control valve at the center of the f, 18g, etc., and collars 27, 28, 29, 30 are pivotally attached to the operating lever pivot shaft 26 sequentially from the front of the machine body. To do. A bracket 31 is fixedly installed on the upper surface of the collar 27, and the operating lever 32 of the boom up / down hydraulic control valve 18a is connected to the side portion of the collar 27. Also, color 28
A bracket 33 is fixedly mounted on the upper surface of the above, and the operating lever 34 of the hydraulic control valve 18g for pushing and pulling the arm is connected to the side portion of the collar 28.

A bracket 35 is fixedly mounted on the upper surface of the collar 29, and the operating lever 36 of the bucket rake hydraulic control valve 18b is connected to the side portion of the collar 29. Further, a bracket 37 is fixedly mounted on the upper surface of the collar 30, and an operating lever 38 of the hydraulic control valve 18h for turning is connected to a side surface of the collar 30. Here, operating fulcrum shafts 39 and 40 are provided on both sides of the operating lever pivot shaft 26 in parallel with the operating lever pivot shaft 26, respectively. Operation fulcrum axis 4
The collars 43 and 44 are pivotally attached to 0. A bracket 45 is fixedly provided on the upper surface of the collar 41, and a bracket 46 is provided so as to project from the side surface of the collar 41. A free rod 47 is connected to the bracket 46, and the end of the free rod 47 is connected to one side of the rotating base portion 19a of the right operation lever 19. Further, a bracket 48 is fixedly mounted on the upper surface of the collar 42, and a bracket 49 is projectingly mounted on the side surface of the collar 42. A free rod 50 is connected to the bracket 49, and the end of the free rod 50 is connected to the other side of the rotating base 19a of the right operation lever 19.

On the other hand, the bracket 5 is provided on the upper surface of the collar 43.
1 is fixed, and a bracket 52 is projected on the side surface of the collar 43. This bracket 52 has a free rod 5
3 is connected, and the end of the swivel rod 53 is connected to one side of the rotating base 21a of the left operation lever 21. Further, a bracket 54 is fixedly mounted on the upper surface of the collar 44, and a bracket 55 is projectingly mounted on the side surface of the collar 44. A free rod 56 is connected to this bracket, and the left operating lever 2
The end portion of the universal rod 56 is connected to the other side portion of the rotating base portion 21a.

Here, one end 57a of the plate 57 is U-shaped and is pivotally attached to the bracket 31 of the collar 27 by pin connection, and the other end 57b of the plate 57 is U-shaped and the bracket 45 of the collar 41 is U-shaped. It is pivotally attached by a hepin connection. Further, one end 58a of the plate 58 is formed into a U shape and is pivotally attached to the bracket 35 of the collar 29 by pin connection, and the other end 58b of the plate 58 is formed into a U shape and is connected to the bracket 48 of the collar 42 by pin connection. Pivot.

One end 59a of the plate 59 is U-shaped and is pivotally attached to the bracket 33 of the collar 28 by pin connection, and the other end 59b of the plate 59 is U-shaped to the bracket 51 of the collar 43. It is pivotally attached by pin connection. Further, one end 60a of the plate 60 is formed into a U shape and is pivotally attached to the bracket 37 of the collar 30 by pin connection, and the other end 60b of the plate 60 is formed into a U shape and is pin connected to the bracket 54 of the collar 44. Pivot.

Then, in the operation pattern shown in FIG.
For example, if the right operation lever 19 is rotated in the front-back direction,
The collar 41 rotates on the operation fulcrum shaft 39 via the free rod 47 connected to the rotating base portion 19a shown in FIG. 3, and the plate 57 moves to either the left or right direction of the machine body. As a result, the collar 27 rotates on the actuating lever pivot shaft 26, and the actuating lever 32 controls the hydraulic control valve 18a for boom up and down to raise and lower the boom.

When the right operation lever 19 is rotated in the left-right direction, the collar 42 is rotated on the operation fulcrum shaft 39 through the free rod 50 connected to the rotation base portion 19a, and the plate 5 is rotated.
8 moves to the left or right of the machine. As a result, the collar 29 rotates on the actuating lever pivot shaft 26, the actuating lever 36 controls the hydraulic control valve 18b for bucket rake, and the bucket is held or released.

On the other hand, in the operation pattern shown in FIG. 4, for example, when the left operation lever 21 is rotated in the front-rear direction, the collar 43 is moved through the free rod 53 connected to the rotation base 21a shown in FIG. Rotate on the operation fulcrum shaft 40 to move the plate 5
9 moves to the left or right of the machine. Accordingly, the collar 28 rotates on the actuating lever pivot shaft 26, and the actuating lever 34 controls the hydraulic control valve 18g for pushing and pulling the arm to push and pull the arm. Although illustration is omitted, the operator can arbitrarily control the hydraulic pressure control valve 18f for oil amount regeneration by, for example, depressing a pedal, and increase the oil amount of the hydraulic control valve 18g for pushing and pulling the arm. You can In that case, the pushing or pulling speed of the arm becomes faster, and the pushing and pulling speed of the arm can be arbitrarily increased during the process of the construction work.

When the left operation lever 21 is rotated in the left-right direction, the collar 44 is rotated on the operation fulcrum shaft 40 via the free rod 56 connected to the rotation base 21a, and the plate 6 is rotated.
0 moves to the left or right of the machine. Accordingly, the collar 30 rotates on the actuating lever pivot shaft 26, the actuating lever 38 controls the turning hydraulic control valve 18h, and the upper frame 14 turns to the left or right in the horizontal direction.

Here, as shown in FIG. 3, one of the hydraulic control valves 18a and 18b has one spacer with respect to the other hydraulic control valves 18f and 18g because the spacer 24 is interposed therebetween.
It deviates forward by a pitch of / 2. Therefore, the brackets 31 and 33 are equidistant from the bracket 45, and the brackets 31 and 33 are equidistant from the bracket 51. Further, the brackets 35 and 37 are equidistant from the bracket 48, and the brackets 35 and 37 are equidistant from the bracket 54. That is, the plates 57, 58, 59, 60 are formed to have the same length and shape, and the plates can be replaced from one bracket to the other bracket.

On the other hand, the hydraulic control valve 18d for driving the one traveling body 12a and the hydraulic control valve 18j for driving the other traveling body 12b are located at the same position on the left and right. As shown in FIG. 2, the traveling lever 22 of the power shovel 11 is a single lever, but as shown in FIG. 4, two operating levers 61 and 6 are provided near the hydraulic control valves 18d and 18j.
Since the two hydraulic control valves 18d and 18j are located at the same position on the left and right, the operating lever 61 should be connected to one hydraulic control valve 18d and the operating lever 62 should be connected to the other hydraulic control valve 18j. Is extremely easy.

Therefore, in the operation pattern shown in FIG.
For example, if the traveling lever 22 is tilted forward with the left and right sides in parallel, both hydraulic control valves 18d and 18j are controlled, and both traveling bodies 12a and 12b are simultaneously driven in the forward direction of the machine body, and the machine body is directed straight. And drive forward. At that time, if the forward tilting angle of the traveling lever 22 is increased,
The amount of oil in both of the hydraulic control valves 18d and 18j increases, and the speed of the airframe increases. Further, if the traveling lever 22 is tilted backward while being parallel to the left and right, both the traveling bodies 12a and 12b are simultaneously driven in the backward direction of the machine body, and the machine body travels in the backward direction in a straight direction.

When the traveling lever 22 is twisted counterclockwise in FIG. 4, the one hydraulic control valve 18d is controlled to drive forward, and the other hydraulic control valve 18j is controlled to drive backward. It If the traveling lever 22 is tilted forward while keeping the above state, the working oil flows to the one hydraulic control valve 18d, and the machine body turns forward and counterclockwise. If the tilting angle of the traveling lever 22 to the front is increased, the vehicle turns left while moving forward while increasing the speed of the aircraft.

On the other hand, if the traveling lever 22 is tilted backward while keeping the above-mentioned state, the hydraulic oil flows to the other hydraulic control valve 18j and the machine body turns rightward in the reverse direction. If the tilting angle of the traveling lever 22 to the rear is increased, the vehicle turns right while moving backward while increasing the speed of the aircraft. On the other hand, when the traveling lever 22 is twisted clockwise in FIG. 4, one hydraulic control valve 18d is controlled to drive backward, and the other hydraulic control valve 18j is controlled to drive forward. If the traveling lever 22 is tilted forward while keeping the above state, the hydraulic oil flows to the other hydraulic control valve 18j, and the machine body turns right forward. If the tilting angle of the traveling lever 22 to the front is increased, the vehicle turns right while moving forward while increasing the speed.

Further, if the traveling lever 22 is tilted backward while keeping the above-mentioned state, the working oil flows to the one hydraulic control valve 18d, and the machine body makes a reverse leftward turn. When the tilting angle of the traveling lever 22 to the rear is increased, the vehicle turns left while moving backward while increasing the speed of the aircraft. Thus, as described above, the hydraulic control valve 18d on one side and the hydraulic control valve 18j on the other side are provided at the same position on the left and right, so that the operating lever 61 can be operated by one traveling lever.
And 62 via both hydraulic control valves 18d and 18
j can be controlled.

Here, the other end 57b of the plate 57, the other end 58b of the plate 58, and the plate 59 shown in FIG.
The other end portion 59b of the plate 60 and the other end portion 60b of the plate 60 are released from the respective pin couplings, and the brackets 45, 48 and 5 are respectively released.
Remove from 1, 54. Then, the plate 57 is flipped up about the one end 57a of the plate 57 and pivoted to the opposite side, and the plate 59 is flipped up about the one end 59a of the plate 59 to pivot the other side. . The same applies to the plates 58 and 60.
The respective one ends 58a and 60a are rotated to the opposite side.

Thus, as shown in FIG.
The other end 57b of the plate 59 is connected to the bracket 51 of the collar 43 by pin connection, and the other end 59b of the plate 59 is connected to the bracket 45 of the collar 41 by pin connection.
The other end 58b of the plate 58 is connected to the bracket 54 of the collar 44 by pin connection, and the other end 60b of the plate 60 is connected to the bracket 48 of the collar 42 by pin connection.

Therefore, the movement of the free rod 47 on one side of the right operation lever 19 is caused by the hydraulic control valve 18 for pushing and pulling the arm.
The movement of the universal rod 50 on the other side of the right operation lever 19 is transmitted to the actuating lever 34 of g.
It is transmitted to the operating lever 38 of h. Also, the left operating lever 2
1, the movement of the universal rod 53 on one side is transmitted to the operating lever 32 of the hydraulic control valve 18a for boom up / down movement, and the movement of the universal rod 56 on the other side of the left operation lever 21 causes the hydraulic control valve for bucket rake. It is transmitted to the operating lever 36 of 18b.

Thus, the operation pattern of the right operation lever 19 and the operation pattern of the left operation lever 21 are switched from the operation pattern shown in FIG. 4 to the operation pattern shown in FIG. That is, the operation of the right operation lever 19 in the front-rear direction and the operation of the left operation lever 21 in the front-rear direction are interchanged, and
Left and right operation of the right operation lever 19 and left operation lever 21
The operation of the left and right of will be replaced.

Even in that case, since the plates 57, 58, 59 and 60 are formed to have the same length and shape as described above, the left and right operation levers 19 are operated even after the operation patterns are switched. The operation feelings of Nos. 21 and 21 do not change at all, and the operator does not feel discomfort in operability.
In addition, fine adjustment of each connected portion immediately after switching the operation pattern is completely unnecessary.

In this embodiment, the plates 57, 58,
Although both ends of 59 and 60 are U-shaped and pin-connected to each bracket, the shape of each plate is not limited to this, and may be another shape such as a band-shaped plate. Here, in the case of switching the operation in the front-back direction and the operation in the left-right direction of the right operation lever 19 in FIG. 4, the swivel rod 47 connected to the rotation base portion 19a of the right operation lever 19 in FIG. The bracket 49 of the collar 41 and the universal rod 50 are connected to the bracket 46 of the collar 41. In that case, when the right operation lever 19 is rotated in the front-rear direction, the bucket rake hydraulic control valve 18b is controlled to hold or release the bucket. When the right operation lever 19 is rotated in the left-right direction, the boom up / down hydraulic control valve 18a is controlled to raise and lower the boom.

When the operation of the left operation lever 21 is switched between the front-back direction and the left-right direction, the left operation lever 2 in FIG.
The universal rod 53 connected to the rotating base 21a of No. 1 is connected to the bracket 55 of the collar 44, and the universal rod 56 is connected to the bracket 52 of the collar 43. In that case, when the left operation lever 21 is rotated in the front-rear direction, the upper frame 14 is rotated to the left or right, and when the left operation lever 21 is rotated in the left-right direction, pushing and pulling of the arm is performed.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[0037]

As described in detail in the above-mentioned embodiment, the present invention installs the hydraulic control valves in two rows in parallel, and in parallel with this, the pivoting portion of the operating lever of each hydraulic control valve and the left and right By providing the operation fulcrum portion of the operation lever, the length and shape of the plate connecting the pivotal attachment portion of the operation lever and the operation fulcrum portion can be formed to be the same. Therefore, by removing these plates and attaching them to other positions, it becomes possible to switch the operation pattern of the operation lever extremely easily, and since the configuration is simplified, the switching device can be stored in a small space, Even small construction machines can set various operation patterns.

Thus, the operator can operate the construction machine by switching to the operation pattern in which he / she is accustomed to heat, and can contribute to the improvement of safety and operability without increasing the cost.

[Brief description of drawings]

FIG. 1 is a side view of a micro excavator that is an example of a construction machine.

FIG. 2 is a front view showing the inside of the upper frame of the power shovel.

FIG. 3 is a plan view of a main part of a control lever switching device.

FIG. 4 is an explanatory diagram showing an operation pattern of left and right operation levers.

FIG. 5 is a plan view of a main portion of the operation lever switching device in a state where the plate connecting position is changed from the state of FIG. 3;

6 is an explanatory diagram showing an operation pattern of the left and right operation levers in a state where the operation pattern is changed from the state of FIG.

[Explanation of symbols]

11 power shovels 18a, 18b, 18c, 18d, 18e hydraulic control valves 18f, 18g, 18h, 18i, 18j hydraulic control valves 19 right operating lever 21 left operating lever 26 operating lever pivot shaft 27, 28, 29, 30 collar 31 , 32, 35, 37 Bracket 32, 34, 36, 38 Actuating lever 39, 40 Operation fulcrum shaft 41, 42, 43, 44 Collar 45, 48, 51, 54 Bracket 57, 58, 59, 60 Plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaaki Tono 3-12-4 Gion, Asanan-ku, Hiroshima City, Hiroshima Prefecture Yutani Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1. A construction machine equipped with left and right operation levers which can be pivotally moved in the front-rear, left-right and left-right directions, in which a plurality of hydraulic control valves are installed in two rows in parallel, and the plurality of hydraulic control valves are provided in the central portion thereof. The pivoting portions of the operating levers of the respective hydraulic control valves are provided in parallel with the control valves, and the operation fulcrums of the left and right operating levers are provided on both sides of the pivoting portions in parallel with the hydraulic control valves. A switching device for an operating lever, wherein a plate connecting the attachment part and the operation fulcrum part is formed detachably.