JP2531844Y2 - Backhoe wiring support structure - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to an intermediate boom, a parallel link in which a base end boom pivotally supported by a swivel base and a distal end boom connected to an arm are arranged in parallel with the intermediate boom. Through each of the joints of the backhoe device configured to be pivotally connected to be able to swing relatively around the longitudinal axis while maintaining the parallel posture, a detection means for detecting the relative bending rotation amount is provided, The present invention relates to a wiring support structure of a backhoe provided with wiring for transmitting a detection result of the detection means to a control device on the body side.

[Conventional technology]

Conventionally, in the wiring support structure of the backhoe,
In the joint portion, for example, the bar is configured to receive and support the wiring by a support member bent into a U shape,
In other areas, there was a structure configured to be supported by a clamp member.

[Problems to be solved by the invention]

In the above conventional structure, the current attitude of the backhoe device is detected by the detection means, and the hydraulic drive device in the backhoe device is electrically controlled by the control device to automatically control and drive the backhoe device to a predetermined attitude. It is necessary to extend the wiring for transmitting the detection result to the control device on the fuselage side along the backhoe device.However, at the bent portion of the backhoe device, the wiring cannot be clamped and fixed. There is one that prevents overhang to the outside and protects it.

However, according to the above-mentioned conventional structure, in the case where the bucket is provided so as to be offset to the left and right with respect to the boom, the wiring is bent not only in the front-back direction but also in the left-right direction, so that the protection is not sufficient and there is room for improvement. was there.

[Means for solving the problem]

The characteristic configuration of the present invention is the wiring support structure of the backhoe described at the beginning, wherein the wiring is arranged along the parallel link, and the wiring associated with the driving of the backhoe apparatus is provided on a lateral outer surface at an intermediate joint portion of the backhoe apparatus. Is provided with a plate-like guide member which forms a space for preventing the laterally outward extension and for allowing the bending deformation.

[Action]

Along with the wiring along the parallel link, a plate-shaped guide member is attached to the lateral outer surface of the intermediate joint of the backhoe device, so around the parallel link and at the intermediate joint, during excavation operation, While effectively preventing the wiring from protruding laterally outward due to the bending operation, the wiring can be freely bent in the space even if the wiring is bent and deformed due to bending,
There is little risk of disconnection of wiring due to sudden bending, and the wiring can be covered with a wide plate-like area at the bent part where the wiring must be located on the outer side, such as contact with external objects etc. There is little fear.

[Effect of the invention]

Therefore, according to the present invention, it is possible to effectively prevent the wiring from being damaged by a rational structure improvement.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 4 shows the backhoe according to the present invention. This backhoe has a crawler-type traveling machine stand (1) equipped with a swivel (2) that can be swiveled all around a vertical axis by driving a hydraulic motor (M1), and is operated on the swivel (2). And a backhoe device (6) connected via a bracket (5) erected on the swivel (2).

The backhoe device (6) includes a boom cylinder (C) for each of a boom (7), an arm (8), and a bucket (9).
1), arm cylinder (C2), bucket cylinder (C3)
By each drive, it is pivotally connected to be able to swing relatively,
It has a plurality of bendable joints. Substantially all of the backhoe device (6) can be folded and stored in the outer end locus of the swivel (2) in plan view. That is, the base boom (7a) pivotally supported by the swivel (2) and the distal boom (7c) connecting the arm (8) are connected to the intermediate boom (7b).
Through a parallel link (14) arranged in parallel with the intermediate boom (7b), the boom (7) is pivotally connected so as to be relatively swingable about the longitudinal axis while maintaining the parallel posture. )
Is provided with an offset cylinder (C4) that swings and drives the base boom (7a). Then, as shown in FIG. 5, the bucket (9) is offset to the side opposite to the control section (3) by driving the offset cylinder (C4), and the boom (7) and the arm (8) are folded and swung. It is configured to perform small radius turning drive by moving.

As shown in FIG. 6, the hydraulic control valve (V1) of the boom cylinder (C1) and the hydraulic control valve (V
3) The electromagnetic control valve (V2) of the arm cylinder (C2), the hydraulic control valve (V5) of the turning hydraulic motor (M1), and the hydraulic control valve (V4) of the offset cylinder (C4) are each electromagnetically driven. And a pair of left and right operation levers (10R) and (10L) and an offset operation switch (11) disposed on the control unit (3).
The control device (12) is configured to drive and control each hydraulic control valve based on the above operation. That is, each of the operation levers (10R) and (10L) is provided so as to be capable of swinging in a cross motion, and first to fourth potentiometers (PM1), (PM2) and (PM3) for detecting the operation amounts in the respective directions. , (PM4) and the pivoting pivots of the boom (7), the arm (8), and the bucket (9) and the pivoting joint of the base boom (7a) and the intermediate boom (7b). Fifth to eighth potentiometers (PM5), (PM6),
(PM7) and (PM8) are provided, and the set values by the first to fourth potentiometers (PM1), (PM2), (PM3) and (PM4) and the fifth to eighth potentiometers (PM5) and (PM
6), the control device (12) so that the measured attitude value of the backhoe device (6) detected by (PM7) and (PM8) matches
Is configured to drive and control each hydraulic control valve.

The control device (12) is disposed in the control section (3), and the output signal of each potentiometer is connected to the wiring (L).
To the control device (12).

Next, a wiring support structure from the potentiometer on the backhoe device (6) side will be described.

As shown in FIG. 4, the wiring (L) of the sixth potentiometer (PM6) for detecting the swing angle of the arm (8) and the wiring (L) of the seventh potentiometer (PM7) for detecting the swing angle of the bucket (9). ) And the wiring (L) of the offset oscillation angle detecting eighth potentiometer (PM8) are provided at couplers (13a), (13b), and (13c) so that they can be separated and connected at intermediate points, respectively. In this case, each is configured to be exchangeable separately.

Also, as shown in FIG. 1 and FIG. 3, the wiring (L) of the sixth potentiometer (PM6) and the seventh potentiometer (PM)
The wiring (L) of (7) is provided along the inner surface side of the parallel link (14) laid in parallel with the intermediate boom (7b).

In a pivot portion (an example of an intermediate joint portion) between the tip boom (7c) and the arm (8), the wirings (L) and (L) are arranged so as to bypass the upper side of the pivot pin (15). In order to prevent the impact from the earth and sand on the wirings (L) and (L) when the arm (8) is operated. As shown in FIGS. 1 and 2, the wirings (L), (L) project laterally outward on the lateral outer surface of the tip boom (7c) as the backhoe device (6) is driven. And a guide member (16) formed by bending a plate material into a U-shape so as to form a space (R) that prevents bending and allows deformation. The wiring (L) of the seventh potentiometer (PM7) is arranged along the upper surface side of the arm (8) so as to reduce the influence of earth and sand during excavation.

The sixth potentiometer (PM6) and the seventh potentiometer (PM7) constitute detection means.

Note that, in the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

The drawings show an embodiment of the wiring support structure of the backhoe according to the present invention. FIG. 1 is a perspective view of a main part, FIGS. 2 and 3 are cross-sectional views of the wiring support part, and FIG. FIG. 5 is a plan view of the backhoe, and FIG. 6 is a control block diagram. (2) ... swivel table, (6) ... backhoe device, (7)
... boom, (7a) ... proximal boom, (7b) ... middle boom, (7c) ... distal boom, (8) ... arm, (1
2) Control device (14) Parallel link (16)
Guide member, (PM6), (PM7) ... Detection means, (L) ...
... wiring, (R) ... space.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshio Nasu 64 Ishizukita-cho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Works (72) Inventor Hidehiko Ohara 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house (56) References Japanese Utility Model Showa 60-80147 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A base boom (7a) pivotally supported on a swivel (2).
And an end boom (7c) to which the arm (8) is connected, through an intermediate boom (7b) and a parallel link (14) arranged in parallel with the intermediate boom (7b). Detecting means (PM6) and (PM7) for detecting relative bending and pivoting amounts at respective joints of a backhoe device (6) having a boom (7) rotatably pivotally connected to the robot. The detection results of the means (PM6) and (PM7) are sent to the control unit (1
A wiring support structure for a backhoe provided with a wiring (L) for transmitting the wiring (L) to the parallel link (14), and the backhoe device (6).
A space (R) for preventing the wiring (L) from protruding laterally outward due to the driving of the backhoe device (6) and for allowing bending deformation on the lateral outer surface of the intermediate joint portion of Wiring support structure for backhoe with attached guide member (16).