JPH04118Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a control device for a hydraulic excavator.

The arrangement of operating levers and operating methods of hydraulic excavators often vary depending on the manufacturer, and in particular, the arrangement of control devices for attachments often differs. Therefore, the driver cannot always operate the control devices with the same pattern, and if the model or manufacturer is different, there may be cases where the driver has to operate the control devices with a completely different arrangement. Drivers usually have their own familiar operating patterns, but it is very inconvenient for drivers to have to operate things that have a different arrangement than their familiar operating patterns. This is not only inconvenient, but also reduces work efficiency and requires a certain amount of time to become completely familiar with the operating pattern, resulting in a loss of time and effort. In such a case, there will be no problem if you can change the arrangement of the control levers to the arrangement that you are familiar with, but there has been no structure made that allows you to easily change the arrangement of the control levers, and it is difficult to do so by yourself. If the driver changes to a different driver, the driver must return to the original arrangement, which is troublesome, and this also causes troublesome parts to be replaced.

This invention was devised in view of the above points, and its purpose is to enable the driver to easily change the arrangement of the control lever device using a simple method.

The configuration of this invention is 1 left and right that can be tilted forward, backward, left and right.
a pair of operating levers, a pair of front bell cranks coupled to each of the operating levers via a pair of rods, a rear bell crank coupled via a pair of rods to a pair of control valves; In a hydraulic excavator control device consisting of a connecting rod connecting a crank and a front bell crank, the rear bell crank consists of a shaft and multiple pipes fitted into it, and a lever is provided protruding from each of the shaft and pipes. At the same time, the pipes can be connected directly to the shaft or adjacent pipes can be connected together with a connecting plate, if necessary.

Since the connection state between the shaft and the pipes and between the pipes can be changed, it is convenient because the arrangement of the control lever device can be changed to the arrangement with which the driver is familiar.

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. The bell crank 5 will operate, and if you move it to the right, the rod 2 will start.
is configured so that the bell crank 3 is operated when the bell crank 3 is lowered. Reference numeral 6 designates the left operating lever, and the operating lever 6 is connected to a bell crank 8 through a rod 7, and to a bell crank 10 through a rod 9. When the operating lever 6 is operated forward, the rod 7 is raised. The bell crank 8 is activated, and when the rod 9 is operated to the right, the rod 9 is raised and the bell crank 10 is activated. 11 and 12 are both rear bell cranks, and one bell crank 11 is connected to the shaft 13.
And the three pipes 14, 15, 1 inserted into this
There is a lever 1 on the right side of the shaft 13.
7, lever 18 on pipe 14, pipe 15
A lever 19 is provided on the pipe 16, and a lever 20 is provided on the pipe 16 so as to project downward. pipe 1
4, 15, and 16 also have screw holes 21 at the top.
A screw hole 22 (in FIG. 1, the screw hole 22 is shown only for the pipe 16, and the pipes 14 and 15 are not shown) is provided at the rear, and the pipe 16 and the shaft are connected with the pipe fixing bolt 23. 13
The left and right pipes 14 and 15 are integrally connected by a connecting plate 24 and a fixing bolt 25. Note that the pipes 14 and 15 can freely rotate relative to the shaft 13. The other bell crank 12 has a shaft 26 and a 3
The shaft 26 has a lever 30 on the left side, a lever 31 on the pipe 27, a lever 32 on the pipe 28, and a lever 33 on the pipe 29 facing upward. It is installed protrudingly. Each pipe 27, 28, 29 has a screw hole 34 at the bottom and a screw hole 35 at the rear.
7 and the shaft 26 are fixed together, and the left and right pipes 2 are fixed together with a connecting plate 37 and fixing bolts 38.
8 and 29 are connected together. In addition, pipe 2
8 and 29 can freely rotate relative to the shaft 26. 39 is a bucket control valve, 40 is a boom operation control valve, 41 is an arm operation control valve, 42 is a swing operation control valve, and the control valve 39 is connected to the lever 17 of the shaft 13 by a rod 43, and the control valve 4
0 is connected to the lever 18 of the pipe 14 by a rod 44, and the control valve 41 is connected to the pipe 2 by a rod 45.
The control valve 42 is connected to the lever 30 of the shaft 26 by a rod 46. 47, 48, 49, and 50 are all connecting rods, the connecting rod 47 connects the bell crank 3 and the lever 31 of the pipe 27, and the connecting rod 48
connects the bell crank 5 and the lever 32 of the pipe 28, a connecting rod 49 connects the bell crank 8 and the lever 19 of the pipe 15, and a connecting rod 50 connects the bell crank 10 and the lever 20 of the pipe 16. Note that 51 indicates bearings for the shafts 13 and 26.

This device is constructed as described above, and when it actually operates, for example, by operating the right operating lever 1 back and forth, the rod 4, bell crank 5,
Pipe 28 via connecting rod 48 and lever 32
The pipe 28 is connected to the adjacent pipe 29 by the connecting plate 37 and its fixing bolt 38.
Since the pipe 2 is integrally connected to the
9 rotates, and therefore lever 33 and rod 4
5, the arm operating control valve 41 is operated. When the operating lever 1 is operated left or right, the pipe 27 is operated via the rod 2, bell crank 3, connecting rod 47, and lever 31, but the pipe is integrally fixed to the shaft 26 with a bolt 36. , a lever 3 protruding from the shaft 26
0 is activated, and therefore, the swing operation control valve 42 is operated via the rod 46. Next, by operating the left operating lever 6 back and forth, the pipe 15 is rotated via the rod 7, bell crank 8, connecting rod 49, and lever 19. Because it is integrally connected to the adjacent pipe 14,
At the same time, the pipe 14 rotates, so that the boom operating control valve 40 is operated via the lever 18 and rod 44. Also, by operating the operating lever 6 left and right, the rod 9, bell crank 1
0. The pipe 16 rotates via the connecting rod 50 and the lever 20, but since the pipe 16 is integrally fixed to the shaft 13 with the bolt 23, the lever 17, which is also fixed to the shaft 13, rotates. Therefore, the bucket control valve 39 is operated via the rod 43.

In this way, operate the right operating lever 1 back and forth to operate the arm operating control valve 41, operate left and right to operate the swing operating control valve 42, and operate the left operating lever 6 back and forth. The boom operation control valve 40 can be operated by operating the arm operation control valve 41 and left and right to operate the bucket operation control valve 39. The control valve 39 for bucket operation can be operated by operating left and right, the control valve 42 for swing operation can be operated by operating left operating lever 6 back and forth, and the control valve 42 for arm operation can be operated by operating left and right. 41, the pipes and shafts, the state of connection between the pipes, the rods,
Change the connection status between the connecting rod and lever. In other words, as shown in Figure 6, the bell crank 11
On the side, connecting plate 2 connects pipe 15 and pipe 16.
4 and bolts 25, and the pipe 14
is fixed to the shaft 13 with bolts 23, and on the bell crank 12 side, pipes 27 and 28 are integrally connected with a connecting plate 37 and bolts 38,
The pipe 29 is fixed to the shaft 26 with bolts 36. Regarding the rods and connecting rods, the rear end of the connecting rod 47 is changed from the lever 31 to the lever 18, and the rear end of the connecting rod 49 is changed from the lever 19 to the lever 33. Similarly Rod 4
Change the front end of 4 from lever 18 to lever 31,
The front end of the rod 45 is changed from the lever 33 to the lever 19. Thus, lever 17 and lever 18 are
Also, the levers 19 and 20, the levers 31 and 32, and the levers 33 and 30 all rotate at the same time, so if you operate the right operating lever 1 back and forth, the rod 4,
Bell crank 5, connecting rod 48, lever 32,
A boom operation control valve 40 is operated via the pipe 28, the connecting plate 37, the pipe 27, the lever 31, and the rod 44. By operating left and right, rod 2, bell crank 3, and connecting rod 4
7, the control valve 39 for bucket operation is operated via the lever 18, the pipe 14, the shaft 13, the lever 17, and the rod 43. By operating the left operating lever 6 back and forth, the rod 7, bell crank 8, connecting rod 49, lever 33, and pipe 2
9, the swing operation control valve 42 is operated via the shaft 26, lever 30, and rod 46. If you move left and right, rod 9, bell crank 10, connecting rod 50, lever 20, pipe 1
6, connection plate 24, pipe 15, lever 1
9. The arm operating control valve 41 is operated via the rod 45.

When changing the operating system, the rod and the connection state between the connecting rod and the lever are changed, and the style of this change is as shown in Fig. 8, in which the bell crank 11 and the bell crank 12 are moved up and down. the rear end of the connecting rod 47, and
Since the lever 18 and lever 31 that connect the front ends of the rods 44 are arranged in a vertical positional relationship, the connecting rods 47 and 44 simply reconnect the upper lever 18 and the lower lever 31 on opposite sides. The lengths of the rods 44 and connecting rods 47 do not need to be taken into consideration when making changes. This also applies when changing the connection state of the connecting rods 49 and 45.

As mentioned above, this idea not only consists of a rear bell crank consisting of a shaft and a pipe with a lever inserted into it protruding, but also allows the pipe to be connected to the shaft or to an adjacent pipe using a connecting plate. Therefore, even if the arrangement between the operating lever and the control valve is different, the driver can easily change it to the arrangement that he or she is familiar with, so the driver can spend time using the different arrangement of the control devices. It is very convenient as there is no need to spend a lot of time learning it. In addition, the arrangement of the operating system can be easily changed, and there is no need to add parts or take other measures that would increase costs, which is extremely advantageous.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention, and Fig. 1 is a perspective view showing the overall outline, Fig. 2 is a view seen from A in Fig. 1, and Fig. 3 is a view from Fig. 2. B-
B sectional view, Figure 4 is an enlarged side view of section C in Figure 1,
Fig. 5 is an enlarged front view of section D in Fig. 1, Fig. 6 is a perspective view when the arrangement of Fig. 1 is changed, Fig. 7 is a front view seen from E in Fig. 6, Fig. 8 is an explanatory diagram of arrangement change. 1... Operation lever, 3... Bell crank, 5...
... Bell crank, 6 ... Operation lever, 8 ... Bell crank, 10 ... Bell crank, 11 ... Rear bell crank, 12 ... Rear bell crank, 13
...Shaft, 14...Pipe, 15...Pipe, 16...Pipe, 17...Lever, 18...
Lever, 19... Lever, 20... Lever, 24
...Connection plate.

Claims (1)

[Scope of utility model registration request] A pair of left and right operating levers that can be tilted forward, backward, 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, which consists of two pairs of upper and lower rear bell cranks, and a connecting rod connecting the rear bell cranks and the front bell crank, the rear bell crank is connected to a shaft and a plurality of pipes fitted into the shaft. The hydraulic excavator is constructed by having levers protruding from the shaft and pipe, respectively, and which allows the pipes to be connected directly to the shaft or adjacent pipes to be integrally connected by a connecting plate, if necessary. Control device.