JP2519469Y2 - Drilling rig - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator such as a backhoe or a wheel loader, and more particularly to an excavator having a detection device for detecting a swing angle of a bucket with respect to the arm attached to a side surface of an arm tip.

[0002]

2. Description of the Related Art A conventional excavation device, as shown in FIG.
The bucket 9 ′ is attached to the arm 8 by matching the center of the arm 8 in the width direction with the center of the bucket 9 ′ in the width direction.
Then, the detection device P ₄ such as a potentiometer for detecting the swing angle of the bucket 9 ′ with respect to the arm 8 is designed to protect the detection device by widening the width of the bucket so as not to protrude from the side surface of the bucket. It was In other words, if the detection device protrudes from the side surface of the bucket, the detection device collides with the side surface of the excavation groove and is damaged during excavation.To prevent this, the width of the bucket is configured to be wide to protect the detection device. Was planned.

[0003]

As described above, if the width of the bucket is widened to prevent damage to the detection device, there is a disadvantage that a groove having a narrow width cannot be excavated.

It is an object of the present invention to protect the detection device and to enable narrow excavation by devising a bucket mounting structure.

[0005]

In order to achieve the above object, the present invention is characterized in that the center of the bucket in the width direction is deviated to the detection device side with respect to the center of the arm in the width direction. The bucket is attached to the arm,
The action and effect are as follows.

[0006]

Since the bucket is attached to the arm so as to be deviated to the detection device side, the detection device can be protected. Therefore, the lateral width of the bucket can be narrowed by the amount deviated.

[0007]

As a result of the above construction, the detection device can be protected, and it becomes possible to excavate a narrow groove.

[0008]

Embodiments of the present invention will be described below with respect to a backhoe excavator.

As shown in FIG. 3, a swivel base 3 is attached to a traveling machine base 2 having a pair of left and right crawler traveling devices 1 and 1 so as to be rotatable around a vertical axis X, and the swivel base 3 has a driving force. Part 4,
The operating cabin 5 and the excavation device 6 are provided to form a backhoe.

The excavator 6 has a base-side boom 7A which is vertically swung by a boom cylinder 7a, an intermediate boom 7B which is horizontally swung by an offset cylinder 7b, and the intermediate boom 7B which is pivoted about a vertical axis. The boom 7 includes a tip-side boom 7C that is freely attached, an arm 8 that is vertically swingable by an arm cylinder 8a, and a bucket 9 that is swingable by a bucket cylinder 9a.

Then, the swing interlocking rod 10 is attached between the base end side boom 7A and the tip end side boom 7C, and the intermediate boom 7B, the interlocking rod 10, the base end side boom 7A and the tip end side bouquet 7C are pivotally supported. The parallel quadruple link mechanism is configured by the above, and the intermediate boom 7B is swung by the offset cylinder 7b to move the distal boom 7C to the proximal boom 7A.
It is possible to fold and store the excavating device 6 on the lateral side of the operating cabin 7 by moving the arm 8 in parallel to the machine body and swinging the arm 8 toward the machine body by the arm cylinder 8a.

Then, a potentiometer P ₁ as a detecting device for detecting the swing angle of the boom 7 with respect to the swivel base 3,
Potentiometer P ₂ for detecting the offset rotation angle, potentiometer P ₃ for detecting the swing angle of arm 8, and potentiometer P for detecting the swing angle of bucket 9.
₄ are provided respectively.

Each of the potentiometers P ₁ , P ₂ ,
The signals from P ₃ and P ₄ are input to the control device 13 using a microcomputer through the A / D converter 12, and these potentiometers P ₁ , P ₂ , P ₃ and P are supplied.
The position of the bucket is determined on the basis of the signal from _4, and when the bucket 9 is located in a dangerous area that must not be too close to the cabin 5, each cylinder 7a, 7b, 8a,
The control valves V ₁ , V ₂ , V ₃ , and V ₄ of 9a are operated to stop the operation of the excavator.

As shown in FIG. 1, the potentiometer P ₄ for detecting the swing angle of the bucket 9 is attached to the pivotal support of the bucket link 11 which is not affected when the bucket is replaced.

The bucket 9 is provided with a pair of left and right bucket brackets 9a, so that the center a of the lateral width of the bucket 9 is deviated to the potentiometer P ₄ side with respect to the center b of the arm 8.
9a is attached so as to be offset from the center a of the bucket 9 in the width direction to the side opposite to the potentiometer P ₄ side, and the bucket width L is the lateral outer end surface of the potentiometer P ₄ and the opposite side. It is configured as a narrow bucket that is configured to be slightly wider than the gap H on the lateral outer surface of the side bucket link 11.

In the claims of the utility model, reference numerals are given for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a plan view of the tip of an excavator.

FIG. 2 is a block circuit diagram of a control system.

[Fig. 3] Side view of the entire backhoe

FIG. 4 is a plan view of a tip of an excavator showing a conventional example.

[Explanation of symbols]

8 arm 9 bucket P ₄ detector a bucket center b arm center

Claims (1)

(57) [Scope of utility model registration request] 1. An excavator equipped with a detection device (P ₄ ) for detecting a swing angle of a bucket (9) with respect to the arm (8) on a side surface of a tip of the arm (8). The center (a) in the width direction is displaced toward the detection device (P ₄ ) side with respect to the center (b) in the width direction of the arm (8), and the bucket (9) is moved to the arm (8). Drilling rig installed at.