JPH04198530A - Operating device for hydraulic excavator - Google Patents

Abstract

PURPOSE:To change operation patterns easily by arranging a plurality of levers connected respectively to sections between an operating lever and a link mechanism connected to a control valve, and by enabling the sections between the layers, to be selectively connected with a plurality of connecting rods. CONSTITUTION:The operating lever 1 of a power shovel or the like is provided with a plurality of levers 6, 7 to be rotationally moved by an arbitrary angle, and a link mechanism 16 connected to a hydraulic control valve 17 is provided with a plurality of levers 8, 9. Besides, sections between the levers 6, 7 and 8, 9 are composed to be selectively connected with a plurality of connecting rods 10. Then, just by reconnecting the levers 6, 7 and 8, 9, operation patterns different from one marker to another are turned into required operation patterns. As a result, the operation patterns can be easily changed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control device for a hydraulic excavator that allows easy changes in operation patterns.

(Conventional technology) Hydraulic excavation like the conventional Panoshoher (in some cases.

An operating device as shown in FIGS. 14 and 15 is installed.

``1. The control device has a plurality of control levers a on the left and right sides, and these control levers a can be operated separately or simultaneously to control the running of the vehicle body, ``swivel control of a two-part revolving structure, control of the working machine, etc.'' The operation of each operating lever is transmitted to a hydraulic control valve d via a link mechanism C through a connecting rod, and the hydraulic control valve d provided in one hydraulic circuit is configured to be switched. .

Further, the hydraulic control valve d operated by each control lever a differs depending on the manufacturer.

For this reason, the operation pattern of control lever a varies from company to company.For example, if an operator who has learned the operation pattern of company Δ operates a hydraulic excavator made by company B, he may make an operation error due to the difference in the operation pattern. This may result in problems such as making it impossible to work smoothly or endangering the surrounding area.

Therefore, a conventional proposal has been to provide a link mechanism C that transmits the operation of the operating lever a to the hydraulic control valve (1) with an operating pattern switching mechanism that allows the operating pattern to be changed each time the arrangement of the pieces is changed. .

(Problem to be solved by the invention) However, in the conventional device in which the operation pattern is changed by changing the arrangement of the pieces, the link mechanism [, which transmits the operation of the operation lever a to the hydraulic control valve d] Since the number of levers increases and the structure becomes complicated, a large operating force is required to operate the operating lever a, which causes the operator to become fatigued quickly.

In addition, the backlash between the many links increases the play in the control lever a, making it difficult to operate the lever a, and when changing the pattern, the links may become misaligned due to the way the pieces connecting the links are viewed. There were also problems such as sluggish movement, increased operating force, and rapid wear of the links.

This invention has been made with the aim of improving the above-mentioned problems, and is intended to provide a control device for a hydraulic excavator that makes it possible to change the pattern without increasing the operating force.

(Means and operations for solving the problem) In order to achieve the above object, the present invention includes a plurality of operating lever groups provided near the driver's seat, and a plurality of hydraulic control valves that control the operation of these operating lever groups. A plurality of levers attached to the operating lever and rotatable at any angle are provided between the link mechanisms for transmission, and a plurality of levers connected to the link mechanism side are provided, and a plurality of levers are provided between these levers. can be selectively connected according to the operation pattern using a plurality of connecting rods.

In this way, when switching the operation pattern from Company A to Company B, for example, remove the connecting rod connecting the levers, rotate the lever on the operation lever side by a predetermined angle, and connect these levers with the lever on the link mechanism side. A desired operation pattern can be obtained by simply changing the settings.

(Embodiment) An embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. 1 to 7.

Figure 1 shows a front view of the control device, and Figure 2 shows a side view. In these figures, reference numeral 1 indicates a plurality of operation levers provided on each side, and these operation levers 1 can be operated in the front, rear, left, and right directions. The console box 3 is rotatably supported on the upper part of a console box 3 installed on the floor plate 2a of the vehicle body 2 so as to be able to rotate.

4 is the base end of the operating lever 1, and these operating levers 1.
This figure shows a pattern switching mechanism provided between a link mechanism 5 that transmits the operation of the operating lever 1 to a hydraulic control valve 6, and a pair of levers 6.7 to which the base end of the operating lever 1 is fixed, and these levers 6. The lever 8, 9 is supported below the lever 7, and a connecting rod 1o connects the levers 6 to 9. Note that 11 is the driver's seat.

As shown in FIG. 3, the levers 6 and 7 fixed to the operating lever 1 have one side approximately fan-shaped and the other approximately trapezoidal so that they can rotate around the operating lever 1. .

The upper ends of connecting rods 10 are connected to the lower surfaces of the corners of these levers 6.7 via ball joints 10a.

The lower end of each connecting rod 10 is connected to the aforementioned lever 8.9, which is mounted on a rotating shaft 12.13.

As shown in FIG. 6, threaded joints 10b are provided in the middle of these connecting rods 10, and these threaded joints 10b allow the upper and lower ends of the connecting rods 0 to be separated. Connecting rod 10 that is not used when switching patterns
can be fixed by clamping a collar 10c provided on the connecting rod 10 to a clamp 15 provided on the floorboard 2a (see FIG. 7).

On the other hand, the lever 8.9 and the rotating shaft 12.13 are supported so as to face each other, as shown in FIG.

The lever 8 supported on the rotating shaft 12 is a turning lever 131
．． 8. It is composed of a swing lever 8□ and a pivot lever 8□, and the pivot levers 8+ and 8= are interlocked by a rotating shaft 12.

The lever 9 supported on the rotation shaft 13 is an arm lever 9. ．． 93 and a boom lever 9□, and the arm lever 9+ and 9° are interlocked by a rotating shaft 13.

The operation transmitted to each lever 8.9 is then transmitted to the hydraulic control valve group 17 via the link 1G.
is controlled by switching.

Next, to explain the operation, for example, as shown in FIG.
0), one lever G may be rotated approximately 90 degrees as shown in FIG.

Next, if you want to change to Company B's operation pattern.

One lever 8 is rotated approximately 90° to switch the connecting rod 10.

That is, as shown in FIG.
1 and boom lever 92. The other corner 62 and the packet lever 8. Connecting rod 10I between.

10□, one corner 7□ of the other lever 7 and the turning lever 83 and the other corner 7. and arm lever 93
Connecting rod between 10. , 10. Connect with.

Similarly, in the case of Company 0, Company D, and Company B, the operation patterns of each company can be changed by simply changing the connection between lever 6.7 and lever 8.9 using connecting rod 10, as shown in Figures 11 to 13, respectively. You will be able to get it.

In addition, if there is a connecting rod IO that is not used depending on the pattern, the connecting rod 10 is divided into 1 pieces by the screw joint 10b in the middle, and the collar 1 installed on the connecting rod 10 on the current side is divided into 1 parts.
．． By clamping and fixing Oc to the clamp 15,
It is possible to prevent interference with the thin connecting rod 10 during operation, and when the pattern change is completed as described above, the lock lever 16 provided on the side of the console box 3 is moved from the lock position to the free position. By rotating, a changed operation pattern can be used.

(Effects of the Invention) As described in detail above, the present invention has a plurality of levers attached to the operating lever between the operating lever and the link mechanism that transfers the operation of the operating lever to the hydraulic control valve, and a plurality of levers attached to the link mechanism side. By setting up multiple connected levers, the levers are selectively connected to multiple connecting rods according to the operation pattern, so when changing the operation pattern, it is necessary to turn the lever on the operation lever side. Changes can be made simply by moving these levers and connecting levers on the link mechanism side with connecting rods, making the operation easier than changing conventional pieces by rearranging them.

In addition, no matter which operating pattern is selected, the operating force of the operating lever is transmitted from the lever to the link mechanism via the connecting rod, so the operating force does not increase, and the pattern can be changed by combining conventional pieces. Since the structure is simpler than that of other devices, it is easy to manufacture and can be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is a front view of an operation 1if device which is an embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 ca + Fig. 1 nl-I
Figure 4 is a view taken along the line N. Figure 4 is a view taken along Figure 1 IV-IV. Figure 4 is a perspective view of the lever (=J). Figure 6 is a detailed view of the connecting rod. , FIG. 7 is a perspective view of the vicinity of crank buoy 1, FIGS. 8 to 13 are explanatory diagrams showing the action when switching patterns, and FIGS. 14 and 15 are explanatory diagrams of the conventional control device. 1 ... Operating lever (j, 7, 8.9... Lever 10... Connection rod 10b... Threaded joint 15.
...Clamp 1G...Link mechanism 17...Hydraulic control valve Patent applicant Komatsu Ltd. (and 1 other person) Agent (patent attorney) Osamu Matsuzawa (and 1 other person) Sod Figure 8 Figure 9 Figure 10 Figure 11 Procedure amendment (Heisei Misaki Kigetsu 24th)

Claims (2)

[Claims] (1) A plurality of operating levers 1 provided near the driver's seat 11, and a plurality of hydraulic control valves 1 that control the operation of these operating levers 1.
A plurality of levers 6 are attached to the operating lever 1 between the link mechanisms 16 that transmit the transmission to the levers 7 and are rotatable at any angle.
, 7 and a plurality of levers 8 and 9 connected to the link mechanism 16 side, and a plurality of connecting rods 10 selectively connect these levers 6 to 9 according to the operation pattern. Excavator control device. (2) A threaded joint 10b is provided in the middle of the connecting rod 10, and the threaded joint 10b divides the connecting rod 10 into upper and lower parts, and the connecting rod 10 that is not used when changing the pattern can be fixed with the clamp 15. The control device according to claim 1.