JPH04117Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a control device for a hydraulic excavator. The arrangement of rods in the control device of a hydraulic excavator and the operation pattern of the control lever vary depending on each hydraulic excavator manufacturer.
When an operator operates another hydraulic excavator that differs from the operation pattern that he or she is familiar with, work efficiency decreases due to lack of familiarity, and it takes a certain amount of time to become proficient in operating the excavator. . Therefore, in order to change to the operating pattern that you are familiar with, you can simply change the arrangement of the rods on the control device, but this requires changing the arrangement of the parts, which is not easy, and also prevents drivers other than you from If you want to manipulate it, you must return it to the original array. This requires time and effort, and also causes troublesome problems such as parts replacement.

This invention addresses the above-mentioned problems and aims to provide a device that allows the arrangement of the rods of the control device to be easily changed in a simple manner.

The structure of this invention consists of a pair of left and right operating levers that can be tilted forward and backward, left and right, and one operating lever for each of the operating levers.
A pair of left and right front bell cranks are connected via a pair of rods, and two pairs of upper and lower rear bell cranks are connected via rods to a pair of left and right control valves. In a hydraulic excavator control device consisting of a connecting rod that connects a bell crank, the rear bell crank is composed of a shaft and a pipe that can be inserted into the shaft to change its position. Rod on the provided lever, or
This is a combination of connecting rods.

Since the position of the pipe with the lever can be changed, it is very convenient because the arrangement of the rods on the control device can be changed to suit the operating pattern that the driver is familiar with. It's convenient.

Hereinafter, embodiments of this invention will be described in detail based on the drawings.

1 is the operating lever on the right side, and the operating lever 1 is connected to the bell crank 3 through the rod 2, and the bell crank 5 is connected through the rod 4, and when the operating lever 1 is operated forward, the rod 4 is lowered. However, the rod 2 is constructed so as to descend when operated to the right. Reference numeral 6 designates the left operating lever, and the operating lever 6 has a rod 7 connected to a bell crank 8, a rod 9 connected to a bell crank 10, and when the operating lever 6 is operated forward, the rod 7 is raised. It is constructed so that the rod 9 rises when operated to the right. 11, 12, 13, and 14 are all rear bell cranks, and bell crank 11 is connected to shaft 15.
and a pipe 17 fitted into this and fixed with bolts 16, and these shafts 15 and pipes 1
Lever 18 protrudes downward from each of 7,
Consists of 19. Bell crank 12 is shaft 20
and insert it into this and fix it with each bolt 16,
and levers 2 each protruding upward.
It consists of two pipes 23 and 24 having pipes 1 and 22. The bell crank 13 includes a shaft 25, a pipe 26 fitted into the shaft 25, and levers 27 and 28 that project downward from the shaft 25 and the pipe 26, respectively. The bell crank 14 includes a shaft 29, a pipe 30 fitted onto the shaft 29 and fixed with a bolt 16, and levers 31 and 32 provided upwardly on the shaft 29 and the pipe 30, respectively.
33, 34, 35, and 36 are all connecting rods that connect the front bell crank and the rear bell crank, and the connecting rod 33 connects the bell crank 3 and the lever 32 of the pipe 30 of the bell crank 14. The connecting rod 34 connects the lever 22 of the pipe 24 of the bell crank 5 and the bell crank 12, and the connecting rod 35 connects the lever 19 of the pipe 17 of the bell crank 8 and the bell crank 11.
The connecting rod 36 connects the bell crank 10 and the lever 28 of the pipe 26 of the bell crank 13. Note that the rear portions of the connecting rods 33, 34, 35, and 36 are all connected to levers of pipes movably fixed to the bell crank. In other words, they are connected so that they can move laterally. 37 is a control valve for bucket operation, 38 is a control valve for boom operation, 39 is a control valve for arm operation, 4
0 is the swing control valve, control valve 3
7 is rod 41 and lever 27 of bell crank 13
The control valve 38 is connected to the lever 18 of the bell crank 11 by a rod 42, and the control valve 39 is connected to the lever 21 of the bell crank 12 by a rod 43.
The control valves 40 are connected to the levers 31 of the bell crank 14 by rods 44, respectively. All of these rods are connected to levers fixed to the shaft, except that the connection part with the bell crank 12 is connected to the lever 21 of the movable pipe 23.

The present invention is constructed as described above, and when the right operating lever 1 is operated back and forth, the control valve 3 for arm operation is activated via the rod 4, bell crank 5, connecting rod 34, bell crank 12, and rod 43.
9 is operated. By operating the operating lever 1 left and right, the rod 2, bell crank 3, connecting rod 33,
A turning operating lever 40 is operated via the bell crank 14 and rod 44. Similarly, if the left operating lever 6 is operated back and forth, the boom operating control valve 38 will be activated via the rod 7, bell crank 8, connecting rod 35, bell crank 11, and rod 42.
is manipulated. By operating the operating lever 6 left and right, the rod 9, bell crank 10, connecting rod 36,
A bucket control valve 37 is operated via the bell crank 13 and rod 41.

If the driver operates the right-hand control lever 1 back and forth to operate the boom, left and right to operate the bucket, and the left-hand control lever 6 back and forth to operate the arm. , when changing to turn by operating left and right, move the pipe 17 of the bell crank 11 to the right as shown in Fig. 2, fix the shaft 15 with the bolt 16, and attach the connecting rod to the lever 19. Connect 34. Further, the pipe 24 of the bell crank 12 is moved to the left and fixed to the shaft 20 with the bolt 16, and the connecting rod 35 is connected to the lever 22 of the pipe 24. Also,
Move the pipe 26 of the bell crank 13 to the right,
It is fixed to the shaft 25 with a bolt 16, and a connecting rod 33 is connected to the lever 28. Further, the pipe 30 of the bell crank 14 is moved to the left and fixed to the shaft 29 with the bolt 16, and the connecting rod 36 is connected to the lever 32. Connecting rod 33 and rod 41 are also connected to connecting rod 34 and rod 42.
However, since the connecting rods 35 and 43 and the connecting rods 36 and 44 are now interlocked, the boom operation control valve 38 can be operated left and right by operating the right operating lever 1 back and forth. Control valve 37 for bucket operation
Furthermore, by operating the left operating lever 6 back and forth, the arm operating control valve 39 can be operated, and by operating the left operating lever 6 left and right, the swing control valve 40 can be operated.

In addition, only the control valve for arm operation has two left and right
If you install two units and operate them simultaneously to send oil from the left and right arm operation control valves to the same circuit to form a merging circuit, move the pipe 23 of the bell crank 12 to the right as shown in Figure 7. Move slightly in the direction. By connecting the rear end of the rod 43 to the connection point of the link 48 connected between the spools 46 and 47 of the left and right arm operation control valves 39 and 45, the rod 43 is operated, that is, the operation lever 1
The left and right arm operation control valves 39, 45 are operated by the front and rear operations.

In this way, the connecting part with the bell crank at the rear of the connecting rod is formed by a pipe inserted into the shaft and a lever protruding from this, and its position can be moved freely and corresponds to the connecting rod to be connected. Since each pipe is fixed to the shaft at a fixed position, the position of each pipe can be freely changed in either the left or right direction, and the arrangement pattern of the operating system can be freely set. It should be noted that, in the arrangement pattern of each manufacturer of a normal hydraulic excavator, there is no arrangement in which the right end becomes the boom, so the pipe 17 connected thereto only needs to be on the left side of the lever 18.

As mentioned above, in the present invention, the connecting part between the connecting rod and the rear bell crank lever is composed of a pipe and a lever protruding from the pipe, which can be slid to the required position and fixed to the shaft. Even if the arrangement of the rods on the control device is different, the driver can change the arrangement to his own desired arrangement and operate it, which is very convenient. In addition, the arrangement of the operating system can be changed by simply recombining the rear bell crank, making it extremely easy to deal with.There is no need to add or install parts, which is very advantageous in terms of time and cost. It is.

[Brief explanation of the drawing]

The drawings are all embodiments of the present invention, but Fig. 1 is a perspective view showing the whole, Fig. 2 is a plan view showing the operating system of the main parts when the operation pattern is different from Fig. 1, and Fig. 3 is a perspective view showing the whole. Figure 4 is the view seen from A in Figure 1, Figure 5 is the view seen from C in Figure 4, and Figure 6 is an explanation of changing the operation pattern. 7 are plan views showing the operating system of the main parts of another embodiment of the present invention. 1... Operation lever, 2... Rod, 3... Bell crank, 4... Rod, 5... Bell crank,
6... Operation lever, 7... Rod, 8... Bell crank, 9... Rod, 10... Bell crank,
11...Bellcrank, 12...Bellcrank,
13...Bellcrank, 14...Bellcrank,
15...Shaft, 17...Pipe, 18...Lever, 19...Lever, 20...Shaft, 21
... lever, 22 ... lever, 23 ... pipe,
24...Pipe, 25...Shaft, 26...Pipe, 27...Lever, 28...Lever, 29...
...Shaft, 30...Pipe, 31...Lever,
32... Lever, 33... Connection rod, 34...
Connection rod, 35... Connection rod, 36... Connection rod, 37... Control valve for bucket operation, 38... Control valve for boom operation, 39
... Control valve for arm operation, 40 ... Control valve for swinging, 41 ... Rod, 42 ... Rod, 43 ... Rod, 44 ... Rod.

Claims (1)

[Scope of utility model registration request] A pair of left and right operating levers that can be operated front and rear, left and right, a pair of left and right front bell cranks connected to each of the operating levers via a pair of rods, and a pair of control valves connected via rods. In a hydraulic excavator control device consisting of two pairs of connected upper and lower rear bell cranks, and a connecting rod connecting the rear bell cranks and the front bell crank, the center of rotation of the rear bell cranks is the center of rotation of the rear bell cranks. Shafts are rotatably provided on the body of the hydraulic excavator, and a lever is protruded from the pipe, and the inner diameter hole of the pipe is fitted to the outer circumference of the shaft, so that the pipe can be moved in the axial direction of the shaft. In addition, the pipe can be locked at a desired position in the axial direction of the shaft, and another lever is provided protruding from the outer periphery of the shaft, and the lever protrudes from the pipe and the other lever is provided from the shaft. A control device for a hydraulic excavator, characterized in that it is configured to selectively connect a connecting rod and a rod to a lever.