JPS63312430A - Combination changer for operating lever and actuator - Google Patents

Abstract

PURPOSE:To easily alter the combination of operating lever and actuator by a method in which the first terminal group to be connected with each operating lever and the second terminal group to be connected with each control valve are provided for the fixing part, and wiring units having different wiring patterns are also provided. CONSTITUTION:An altering device for the combination of operating lever and actuator consists of a fixing part 5a, a mounting part 5b, and a wiring unit 5c. The part 5a is provided with terminals T3a and T3b to be connected with operating levers 3a and 3b and terminals T2a and T2b to be connected with control valves 2a and 2b, and the unit 5c is provided with a wiring pattern connecting the terminals T$3a-T2b differently. In case an oil-pressure actuator 1a is operated by the lever 3a and also the oil-pressure actuator 1b is operated by the lever 3b for example, the unit 5c1 is selected, and reversely when the operation is needed, the unit is altered to other unit. The alteration of combinations can thus be made easier to obtain a desired combination.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a combination changing device for a control lever and an actuator, which is used to arbitrarily change the correspondence between a control lever and an actuator provided in an earth-moving machine. Regarding.

[Conventional technology]

Earthmoving machines such as hydraulic excavators are equipped with hydraulic actuators, and required work is performed by driving and operating the hydraulic actuators using operating levers.

Incidentally, the arrangement and operation direction of the operating levers provided on earth-moving machines usually differ depending on the manufacturer of the earth-moving machine. For example, taking the boom lever that operates the boom cylinder, which is the hydraulic actuator of a hydraulic excavator, in company A it is placed on the right side of the operator's seat, while in company B it is placed on the left side of the operator's seat. Company A's boom lever is placed on the right front side of the seat, and Company A's boom lever extends the boom cylinder rod by pulling it toward you, whereas Company B's boom lever extends by pulling it toward the opposite side. Also, the one made by Company 0 has a structure in which the rod of the boom cylinder is extended by tilting it to the left side, and each has a different configuration. Therefore, for an operator who is accustomed to operating earth-moving machines manufactured by Company A, when operating earth-moving machines manufactured by Company B or Company C, not only is it a great inconvenience, but the operator is not aware of the differences between the two. There was a problem in that it was extremely tiring.

In order to solve this problem, when the operating lever is an electrical operating lever, a method has been adopted in which a changeover switch is interposed between the operating lever and a control valve that drives and controls the hydraulic actuator. This will be explained using a diagram.

FIG. 2 is a system diagram of a conventional combination changing device.

In the figure, 1a and 1b are hydraulic actuators, and 2a is a hydraulic actuator.

2b is a control valve that controls the driving of the hydraulic actuators 1a and 1b. Reference numerals 3a and 3b are operating levers for operating the hydraulic actuators 1a and 1b, and output electrical signals to the control valves 2a and 2b according to the amount of operation and the direction of operation. 4 is the operation lever 3a, 3
This is a changeover switch interposed between the control valve 2b and the control valves 2a and 2b, and can be switched to two positions, upper and lower.

Now, when the changeover switch 4 is switched to the upper position as shown in the figure, the operating lever 3a is connected to the hydraulic actuator 1.
It is used as a lever to operate a. That is, when the operation lever 3a is operated, an electric signal is output in response to the operation to switch the control valve 2a, and in response to this switching, pressure oil is supplied from a hydraulic pump (not shown) to the hydraulic actuator 1a, thereby causing the hydraulic actuator 1a to
is driven and the intended work is performed. Similarly, the operating lever 3b is used as a lever for operating the hydraulic actuator 1b.

Next, when the changeover switch 4 is switched from the illustrated position to the lower position, the operating lever 3a is used as a lever for operating the hydraulic actuator 1b, and the operating lever 3b
will be used as a lever to operate the hydraulic actuator 1a. In this way, by switching the changeover switch 4, the combination of the operating lever and the hydraulic actuator can be changed.

[Problem that the invention seeks to solve]

In FIG. 2, two hydraulic actuators la, l
b and two operating levers 3a, 3b are shown. However, an actual earthmoving machine is equipped with a large number of hydraulic actuators and operating levers. Therefore, it is extremely difficult to use a changeover switch to perform all combinations of these hydraulic actuators and operating levers, and there is a limit to the number of combinations. For this reason, there is a drawback that if an arbitrary combination cannot be obtained with the changeover switch, the changeover switch must be replaced or modified.

Furthermore, poor contact may occur in the contacts of changeover switches, and when such poor contact occurs, the signal output from the operating lever changes, making it impossible to operate the hydraulic actuator as intended, resulting in a lack of reliability. I felt regret.

An object of the present invention is to solve the above-mentioned problems of the prior art, to enable arbitrary combinations without replacing or modifying the main body part, and to have a highly reliable combination changing device for operating levers and actuators. is to provide.

[Means for solving problems]

In order to achieve the above object, the present invention includes a plurality of control levers that output electric signals according to their operations, control valves that are controlled in accordance with the operations of these control levers, and control valves that are controlled in accordance with the opening and closing of these control valves. an earth-moving machine comprising a driven hydraulic actuator; a fixed part having a first terminal group connected to each operating lever and a second terminal group connected to each control valve;
A plurality of wiring units that connect the terminal group and a second terminal group in different combinations, and a mounting part that connects and mounts a selected one of these wiring units to a fixed part. shall be.

[Effect]

Each wiring unit has a wiring pattern that connects each terminal of the first terminal group and each terminal of the second terminal group, and this wiring pattern differs for each wiring unit. Therefore, by selecting one of the wiring units and installing it in the mounting part, a connection is made between each operating lever and each hydraulic actuator according to the wiring unit installed in the mounting part. This allows any combination of operating lever and hydraulic actuator to be obtained. If you want to obtain another combination, select the corresponding wiring unit and attach it to the attachment section.

〔Example〕

Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 1 (Al is a system diagram of a combination changing device according to an embodiment of the present invention. In the figure, the same parts as those shown in FIG. The changing device is shown and is composed of a fixed part 5a, a mounting part 5b provided on the fixed part 5a, and a selected wiring unit 5c.The fixed part 5a has terminals T3 connected to the operating levers 3a and 3b. □T3b and control valves 2a, 2
Terminal T2.b connected to terminal T2.b. ．． T2b is provided.

Wiring unit) 5C, each terminal T 31 of the fixed part 5a
11 Tffbl Terminals T,,',T,,',T2, which are respectively connected to Tza, Tzb. '
, T, b' are provided, and each of these terminals T3
a', T3b', T28'.

Tzb' are connected by a predetermined pattern of wiring 5L+. In the case shown, this pattern is terminal T3. ′,
This pattern connects between T2m' and between terminals T3)' and Tzb', respectively. 5d is wiring unit 5
This is a protrusion provided on c+ and inserted into the mounting portion 5b.

FIG. 1 (bl is a plan view of another wiring unit).

This wiring unit 5cz is similar to the wiring unit 5C shown in FIG.
, T2. ,'r2. The terminals T3n'+ Tsb' r Tz*' and Tz to be connected respectively to
b', and a protrusion 5d, but the wiring 5
Unlike the wiring unit 5L+ of the wiring unit 5c+, L2 has a pattern that connects between the terminals 'rffm'+Tab' and between the terminals 73b' and T2++'.

If you want to operate the hydraulic actuator 1a with the operating lever 3a and the hydraulic actuator 1b with the operating lever 3b, select the wiring unit) 5c+ and connect its protrusion 5d.
By inserting the wiring unit 5c into the mounting part 5b,
is attached to the fixed part 5a. At this time, the terminal T Ia,
T jb + T za, T 2b and terminal Tia
' + Tffb' + T211' + Tzb
' are connected respectively. As a result, the outputs of the operating levers 3a, 3b are input to the control valves 2a, 2b via the wiring 5L+, respectively.

Note that various engagement means such as a strip engagement are known to engage the mounting portion 5b and the protrusion 5d, and various types of connectors such as a pin connection consisting of a pin and its insertion hole are also known to connect the terminals to each other. It has been known.

Next, if you want to operate the hydraulic actuator 1b with the operating lever 3a and operate the hydraulic actuator 1a with the operating lever 3b, the wiring unit 5c.

and attach the wiring unit 5cz to the fixed part 5a.

As a result, the operating lever 3a and the control valve 2b
, the operating lever 3b and the control valve 2a are connected via wiring lines 5r-zt', respectively, so that desired operations can be performed.

As described above, in this embodiment, a terminal connected to each operating lever and a terminal connected to each control valve are provided on the fixed part, and a wiring unit having a desired wiring pattern is attached to this fixed part. Therefore, by creating a wiring unit with a desired wiring pattern, a desired combination of an operating lever and a hydraulic actuator can be obtained without modifying or replacing the main body of the changing device. or,
Unlike a changeover switch, there is less risk of contact failure, and reliability can be improved.

In addition, in the explanation of the above embodiment, two operation levers, two control valves, and two hydraulic actuators were illustrated, but it is obvious that it is applicable even if there are three or more, and in that case. , the number of terminals and the number of wiring units to be prepared will increase.

〔Effect of the invention〕

As described above, in the present invention, the fixed part is provided with a first terminal group connected to each operating lever and a second terminal group connected to each control valve, and this fixed part is provided with a plurality of terminals having different wiring patterns. Since one of the wiring units is selected and installed, a desired combination of the operating lever and the hydraulic actuator can be easily obtained without modifying or replacing the main body of the changing device. Furthermore, since no changeover switch is used, there is less risk of poor contact and reliability can be improved.

[Brief explanation of drawings]

FIG. 1 (al is a system diagram of a combination changing device according to an embodiment of the present invention, FIG. 1(b) is a plan view of a wiring unit, and FIG. 2 is a system diagram of a conventional combination changing device. la, lb...Hydraulic actuator, 2a, 2
b...Control valve, 3a, 3b...
...Operation lever, 5...Combination changing device, 5
a... Fixed part, 5b... Mounted part, 5C
,,5C2...Wiring unit, 5d...
·protrusion. Figure 1

Claims (1)

[Claims] Multiple control levers that output electrical signals according to the operation,
In an earthmoving machine equipped with a control valve that is controlled according to the operation of these operation levers and a hydraulic actuator that is driven according to the opening and closing of these control valves, a first terminal group connected to each of the operation levers; A fixed part having a second terminal group connected to each of the control valves, a plurality of wiring units connecting the first terminal group and the second terminal group in different combinations, and these wiring units. A device for changing the combination of a control lever and an actuator, characterized in that it comprises a mounting section for connecting and mounting a selected one of the operating levers to the fixing section.