JPH0745746B2 - Device for changing the combination of operating lever and actuator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a device for changing the combination of an operating lever and an actuator, which is used for arbitrarily changing the correspondence between the operating lever and the actuator provided in an earthworking machine. Regarding

[Conventional technology]

An earthworking machine such as a hydraulic shovel is provided with a hydraulic actuator, and a required work is performed by driving and operating the hydraulic actuator with an operating lever.

By the way, the arrangement and operation direction of the operation lever provided in the earthworking machine are usually different depending on the manufacturer of the earthworking machine. For example, taking a boom lever that operates a boom cylinder, which is a hydraulic actuator of a hydraulic shovel, as an example, in Company A, it is arranged on the right side of the operator's seat, whereas in Company B, it is arranged on the left side of the seat, and C. The company has a structure that is placed in the front right of the seat, and the boom lever of company A is extended toward the front to extend the rod of the boom cylinder, while that of company B is tilted toward the other side. Further, the company C has a structure in which the rod of the boom cylinder is extended by tilting it to the left side, which are different modes. Therefore, A
When operating an earthmoving machine manufactured by Company B or C by an operator who is familiar with the operation of the earthmoving machine manufactured by the company, not only is there a great inconvenience, but the difference between the two must always be conscious of during operation. There was a problem of being extremely tired.

In order to solve this problem, when the operation lever is an electric operation lever, a means for interposing a switching switch between the operation lever and a control valve for driving and controlling the hydraulic actuator has been adopted. This will be described with reference to the drawings.

FIG. 2 is a system diagram of a conventional combination changing device. In the figure,
1a and 1b are hydraulic actuators, and 2a and 2b are control valves for controlling the driving of the hydraulic actuators 1a and 1b. 3
Reference numerals a and 3b are operation levers for operating the hydraulic actuators 1a and 1b, and output electric signals to the control valves 2a and 2b according to the operation amount and the operation direction. A switching switch 4 is interposed between the operating levers 3a and 3b and the control bulks 2a and 2b, and can be switched between upper and lower positions.

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

Next, when the switching switch 4 is switched from the illustrated position to the lower position, contrary to the above, the operating lever 3a serves as a lever for operating the hydraulic actuator 1b, and the operating lever 3b serves as a lever for operating the hydraulic actuator 1a. Will be used. Thus, by switching the switching switch 4, the combination of the operating lever and the hydraulic actuator can be changed.

[Problems to be solved by the invention]

In FIG. 2, two hydraulic actuators 1a, 1b and two operating levers 3a, 3b are shown. However, in an actual earthworking machine, a large number of hydraulic actuators and operating levers are provided. Therefore, it is extremely difficult to perform all combinations of these hydraulic actuators and operating levers by the switching switch, and the number of combinations is limited. For this reason, there is a drawback that the switching switch needs to be switched or modified if an arbitrary combination cannot be obtained by the switching switch.

Further, in the switching switch, contact failure may occur at the contact portion, and if such contact failure occurs, the signal output from the operation lever changes, and the hydraulic actuator cannot be operated as intended, resulting in lack of reliability. I'm sorry.

The object of the present invention is to solve the above-mentioned problems of the prior art, to enable any combination without the need for replacement or modification of the main body portion, and to have a highly reliable combination change device of the operating lever and the actuator. To provide.

[Means for solving problems]

In order to achieve the above object, the present invention provides a plurality of operation levers that output an electric signal according to an operation, a control valve that is controlled according to the operation of these operation levers, and a control valve that is opened and closed according to the opening and closing of these control valves. In an earthworking machine equipped with a driven hydraulic actuator, a fixed part having a first terminal group connected to each operation lever and a second terminal group connected to each control valve, and a first
A plurality of wiring units for connecting the second terminal group and the second terminal group in different combinations, and a mounting portion for connecting and mounting a selected one of these wiring units to the fixed portion. And

[Action]

Each wiring unit has a wiring pattern for connecting each terminal of the first terminal group and each terminal of the second terminal group, and this wiring pattern is different for each wiring unit. Therefore, by selecting one of the wiring units and mounting it on the mounting unit, the connection between each operating lever and each hydraulic actuator can be made according to the wiring unit mounted on the mounting unit. Thus, any combination of operating lever and hydraulic actuator can be obtained. If another combination is desired, select the wiring unit corresponding to this and mount it on the mounting part.

〔Example〕

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

FIG. 1 (a) 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. Reference numeral 5 denotes a combination changing device, which includes a fixed portion 5a and a mounting portion 5 provided on the fixed portion 5a.
b, and the selected wiring unit 5c ₁ . The fixed part 5a has terminals T _3a and T _3b connected to the operation levers 3a and _3b.
And a terminal T _2a connected to the control valves 2a, 2b,
T _2b is provided.

The wiring unit 5c ₁ has terminals T _3a , T _3b , and
Terminals T _3a ′, T _3b ′, which are connected to T _2a and T _2b , respectively
T _2a ′, T _2b ′ are provided, and these terminals T _3a ′, T _2a ′, T _2b ′ are provided.
_{3b ', T 2a', T} 2b ' between are connected by wire 5L ₁ in a predetermined pattern. In the case shown, this pattern is terminal T
_The pattern connects _3a 'and _T2a ' and terminals _T3b 'and _T2b ', respectively. 5d is a protrusion which is inserted into the mounting portion 5b is formed in the wiring Yunitsuto 5c _1.

FIG. 1 (b) is a plan view of another wiring unit. This wiring unit 5c ₂ is a wiring unit 5c ₁ shown in FIG. 1 (a).
In the same manner as described above, terminals T _3a ′, T _3b ′, T _2a ′, T _2b ′ to be connected to terminals T _3a , T _3b , T _2a and T _2b of the fixed portion 5a, and a protrusion 5d are provided. However, the wiring 5L ₂ is different from the wiring unit 5L ₁ of the wiring unit 5c ₁ , and the terminal T _3a ′,
The pattern is to connect between T _2b ′ and between terminals T _3b ′ and T _2a ′, respectively.

If you want to operate the hydraulic actuator 1a with the operating lever 3a and operate the hydraulic actuator 1b with the operating lever 3b,
By selecting the wiring unit 5c ₁ and inserting the projection 5d into the mounting portion 5b, the wiring unit 5c ₁ is mounted on the fixed portion 5a. At this time, terminals T _3a , T _3b , T _2a , T _2b and terminals
T _3a ′, T _3b ′, T _2a ′ and T _2b ′ are connected respectively.
As a result, the operation lever 3a, control respectively 3b is output through the wire 5L ₁ valve 2a, it will be input to 2b.

As for the engagement between the mounting portion 5b and the protrusion 5d, various engagement means such as a snap engagement are known, and the mutual connection of each terminal is also a pin connection including a pin and its insertion hole and other various connectors. It has been known.

Next, operate the hydraulic actuator 1b with the operating lever 3a,
If you want to operate the hydraulic actuator 1a denotes an operation lever 3b, to attach the wiring Yunitsuto 5c ₂ on the fixed portion 5a disconnect the cables Yunitsuto 5c _1. Thus, the operation lever 3a and the control valve 2b, the operating lever 3b and the control valve 2a is connected through a respective wire 5L _2, it is possible to perform a desired operation.

As described above, in this embodiment, the fixed portion is provided with the terminals connected to the respective operation levers and the terminals connected to the respective control valves, and the fixed portion is equipped with the wiring unit having the desired wiring pattern. Therefore, by forming a wiring unit having a desired wiring pattern, a desired combination of the operating lever and the hydraulic actuator can be obtained without modifying or replacing the changing device body. or,
It is less likely that a contact failure will occur as in a switching switch, and reliability can be improved.

In the above description of the embodiment, two operation levers, two control valves, and two hydraulic actuators have been described as examples, but it is clear that three or more operation levers are also applicable. Therefore, the number of terminals and the wiring unit prepared will increase.

〔The invention's effect〕

As described above, in the present invention, the fixed portion is provided with the first terminal group connected to each operation lever and the second terminal group connected to each control valve, and the fixed portion is provided with a plurality of different wiring patterns. Since one of the wiring units is selected and mounted, it is possible to easily obtain a desired combination of the operation lever and the hydraulic actuator without modifying or replacing the changing device body. Further, since the switching switch is not used, there is little risk of contact failure, and reliability can be improved.

[Brief description of drawings]

1 (a) 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. 1a, 1b …… hydraulic actuator, 2a, 2b …… control valve, 3a, 3b …… operation lever, 5 …… combination changing device, 5a …… fixing part, 5b …… mounting part, 5c ₁ , 5c ₂ …… Wiring unit, 5d ... Protrusion.

Claims (1)

[Claims] 1. A plurality of operating levers for outputting electric signals according to operations, a control valve controlled according to the operation of these operating levers, and a hydraulic actuator driven according to opening / closing of these control valves. In the earthmoving machine equipped with the first operation lever connected to each of the operation levers.
And a plurality of wiring units that connect the first terminal group and the second terminal group in different combinations. A combination changing device of an operating lever and an actuator, comprising: a mounting part for connecting and mounting a selected one of these wiring units to the fixed part.