JPH0513805Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dozer work vehicle in which an earth removal plate is provided so that its front and rear positions can be changed via a pair of left and right arms provided on the vehicle body.

[Conventional technology]

Conventionally, in the above dozer work vehicle, the left and right arms each have a pair of cylindrical arm portions 20 that are slidably fitted together in the longitudinal direction of the vehicle body, as shown in FIG.
A fixing device 21 consisting of a hydraulic cylinder for fixing the expansion and contraction of the arm A with respect to the vehicle body was provided.

[Problem that the invention attempts to solve]

However, the pair of cylindrical arm portions 20A and 20B
In order to make the cylindrical arm parts 20A and 20B slide smoothly against each other, not only must the machining accuracy of the cylindrical arm parts 20A and 20B be high over the entire wide sliding surface, but also the two cylinders must be Mud tends to enter between the cylindrical arm portions 20A and 20B, making it difficult to extend and retract the arm A to change the front and back position of the earth removal plate 13, and the mud that has entered the cylindrical arm portions 20A and 20B. There was a drawback that the sliding contact part of the product wore out.

An object of the present invention is to provide an arm that is easy to process and causes less trouble due to mud.

[Means for solving problems]

In the dozer work vehicle of the present invention, each of the left and right arms is composed of a bending/extending link that extends and contracts in the longitudinal direction of the vehicle body, and is provided with a first fixing device for fixing the swinging movement of the arm with respect to the vehicle body, and also includes a first fixing device for fixing the swinging movement of the arm with respect to the vehicle body. The second fixing device is provided, and its effects are as follows.

[Effect]

In other words, by bending and extending the left and right arms, and fixing the swinging and bending of the arms using the first and second fixing devices, the earth removal plate can change its longitudinal position relative to the vehicle body and perform dozer work. Therefore, it is only necessary to increase the machining accuracy of the pivot joint for bending and extending the arm. Moreover, even if mud adheres to the pivot joint, the area of sliding contact is smaller than before, so it is difficult to remove mud. There is little wear due to intrusion and mud.

[Effects of the invention] Therefore, processing of the arm is easier than before,
Problems caused by mud were reduced, manufacturing costs were reduced, and the product could be used for a long time. In addition, a pivot connection with a small sliding contact area provides easier protection from mud, reduces arm wear, and improves durability than a conventional sliding fitting.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 4, a swivel base 2 is provided on a traveling machine base equipped with a crawler type traveling device 1 so as to be able to freely rotate around the vertical axis, a control section 3 is disposed on the swivel base 2, and a A backhoe device 4 is provided, and a dozer device 5 is provided extending forward from the traveling machine base.
The work vehicle is constructed so that it can perform both ground excavation and earth removal work, even though it is a single vehicle.

As shown in FIGS. 1 and 2, the dozer device 5 has a pair of left and right first arm portions 9, 9 connected by a reinforcing frame 8 to a horizontal frame 7 that connects left and right truck frames 6, 6. The second arm portion 11 is pivotally connected to the ends of the left and right first arm portions 9, 9 so as to be swingable in the left and right directions via the first hydraulic cylinder 10, and the third The arm portion 12 is connected to the second arm portion 11 so as to be swingable left and right, and the third arm portion 1
The earth removal plate 13 is attached to the tip of 2 so as to be able to swing left and right.
The second and third arm portions 11 and 12 are formed into flexible links that extend and contract in the longitudinal direction of the vehicle body, so that the earth removal plate 13 can be freely changed in its longitudinal position.

Then, both the second arm portions 11, 11,
A pair of second hydraulic cylinders 14, 14, each of which is operated to swing left and right separately to fix its swing angle, are attached to a protruding frame 15 that is integrally connected to the front of the reinforcing frame 8. Arm part 1
The relative swing angle between the two arms can be changed and fixed by changing the insertion and removal positions of lock pins 17 into bosses 16 formed on the second and third arm parts 11 and 12, respectively.

Next, as shown in FIG.
Earth removal plate 13 due to change of fitting position to boss 16 of 7
The positions and postures of the soil discharging plate 13, in which the arm A consisting of the second and third arm portions 11 and 12 is extended, are moved from the protruding state (FIG. 3A) to the left and right second hydraulic pressure. If the cylinders 14, 14 are extended by the same amount, the earth removal plate 13 will be in the retired state (third position) approaching the vehicle body.
The earth removal plate 13 protrudes (the third
If only one of the second hydraulic cylinders 14 is extended from Figure A), the earth removal plate 13 will be in an angled dozer state (Figure 3 C) in which it tilts to the left or right with respect to the vehicle body, and the earth removal plate 13 will protrude. If only the left and right third arm portions 12, 12 are swung left and right from this state, the vehicle body side dozer operation state (FIG. 3D) is achieved in which the earth removal plate 13 moves in parallel outward in the width direction of the vehicle body.

[Another example]

The second hydraulic cylinder 14 is referred to as a first fixing device, and the boss 16 and lock pin 17 are referred to as a second fixing device.

Each of the arms A may consist of a pair of arm portions that bend and extend vertically in addition to the second and third arm portions 11 and 12 that bend and extend left and right, and may also include two arm portions in addition to the two arm portions. It may also consist of the above arm parts.

The first fixing device may be replaced by the second hydraulic cylinder 14 and may be a combination of a boss and a lock pin, and the swinging of the arm A relative to the vehicle body may be fixed by manual operation.

In addition to a backhoe with a dozer, the present invention may be applied to a vehicle exclusively for dozer work.

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

[Brief explanation of drawings]

The drawings show an embodiment of the dozer work vehicle according to the present invention, FIG. 1 is a plan view of the dozer device, FIG. 2 is a side view of the dozer device, and FIGS. 3A, B, C, and D are views of the dozer device. FIG. 4 is a general side view of the working vehicle, and FIG. 5 is a partial cross-sectional view of a conventional dozer device. 13... earth removal plate, 14... first fixing device, 1
6, 17...Second fixing device, A...Arm.

Claims (1)

[Scope of utility model registration request] A pair of left and right arms A with earth removal plates 13 provided on the vehicle body
The dozer work vehicle is provided so that the front and rear positions can be changed freely through a dozer, in which each of the left and right arms A is made up of bending and extending links that extend and contract in the front and back direction of the vehicle body, and a dozer is provided with a dozer for fixing the swinging movement of the arm A with respect to the vehicle body. 1
A dozer work vehicle which is provided with a fixing device 14 and second fixing devices 16 and 17 for fixing the bending and extension of the arm A.