JPS6220734Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the structure of a dozer cylinder.

Since the above-mentioned cylinder is installed near the ground, stones, etc. thrown up as the machine travels collide with the connecting block to the cylinder or the piping connection to the connecting block, damaging these and causing oil leaks, etc. There was a problem that arose.

In view of the above points, the present invention provides good protection for the connecting block and the piping connection to it by rationally arranging the connecting block and the protective member therefor, and also enables repair and inspection of the connecting portion. The purpose is to make it easy to do.

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

A swivel base 2 is provided on a traveling vehicle body equipped with a crawler traveling device 1 so as to be freely swivelable around a vertical axis P.
A control section 3 is disposed at the front part of the excavation device 3, and an excavation device 5 is provided at the front part of the excavation device 5 via a swing bracket 4 so as to be able to freely rotate around the vertical axis Q. On the other hand, an earth removal device 6 is installed at the front part of the traveling vehicle body using a hydraulic type. As an example, the work vehicle is provided so as to be vertically driven and movable via a hydraulic dozer cylinder 7, and thus the work vehicle is configured to perform both ground excavation and soil removal work.

In order to drive the dozer cylinder 7, the dozer cylinder 7 is connected to the distal end side of the cylinder portion 7a in a symmetrical position sandwiching the axis of the cylinder portion 7a. A piping connection portion 9 provided above each of the connection blocks 8, 8 and a rotary joint 10 are connected to each other via a hose 11, and are configured to be driven by pressure oil supplied from the swivel base 2 side.

The end faces of both connecting blocks 8, 8 on the side facing away from the axis are positioned in a U-shape such that the protective surface portion 12a straddles the cylinder portion 7a and covers the upper part of each piping connection portion 9, 9. Protective member 1
2, and are detachably connected by bolts 13..., and configured to prevent stones, etc. thrown up as the vehicle is running from colliding with the connecting blocks 8, 8 and both connecting portions 9, 9. be.

In summary, the structure of the dozer cylinder according to the present invention is such that the connecting blocks 8, 8 are mounted at symmetrical positions on both the left and right sides of the fluid pressure cylinder 7 with the axis of the fluid pressure cylinder 7 sandwiched between them. The end faces on the side facing away from the axis are connected with a bolt 13 via a U-shaped protection member 12, and the protection surface portion 12a of the protection member 12 and the both connection blocks 8, 8 are connected to each other by the fluid pressure. Pipe connection parts 9, 9 are located above and below in a direction orthogonal to the axis of the cylinder 7 and are used to connect pipes 11 for supplying and discharging working fluid to the fluid pressure cylinder 7.
are mounted on each side surface of both connection blocks 8, 8 and in a space sandwiched between the protective surface portion 12a of the protection member 12 and each side surface of the connection blocks 8, 8. It is characterized by:

That is, the end faces of the connecting blocks 8, 8 on the side away from the axis are connected via the U-shaped protection member 12, and the protection surface portion 12a of this protection member 12 is
Since the pipe connection parts 9, 9 are installed in the space formed between the pipe connection parts 9, 9 and the connection blocks 8, 8, the connection parts 9, 9 and the connection blocks 8, 8 are well protected from collisions with stones, etc. In addition to protection, the protective member 12 increases the mounting strength of the connecting blocks 8, 8, and even if external force is applied to the protective member 12, there is less risk of deformation and displacement of the connecting blocks 8, 8, and oil leakage. etc. are unlikely to occur.

That is, the protective member 12 connects the free ends of the connecting blocks 8, 8 that are cantilevered to the fluid pressure cylinder 7, thereby reinforcing the mounting structure thereof, and also 8 are provided at symmetrical positions with respect to the axis, the length of the protective member 12 itself can be made as short as possible, and even if an external force is applied to the protective member 12 due to a collision with a stone, etc., this external force will not be affected. Therefore, the bending moment generated at the joint between the protective member 12 and the connecting blocks 8, 8 is relatively small, and deformation and displacement of the connecting blocks 8, 8 are less likely to occur.

Further, since the protective member 12 is fixed to the blocks 8 with bolts 13, the protective member 12 can be easily attached and detached, and repair and inspection of the connecting portion 9 and the connecting block 8 can be easily performed.

[Brief explanation of the drawing]

The drawings show an embodiment of the structure of the dozer cylinder according to the present invention, in which Fig. 1 is an overall side view of the working vehicle, Fig. 2 is a perspective view of the main parts, and Fig. 3 is a sectional view taken along the line -- in Fig. 2. It is. 7...Fluid pressure cylinder, 11...Pipe, 8...Connection block, 9...Piping connection part, 12...Protection member, 12a...Protection surface portion, 13...Bolt.

Claims (1)

[Scope of utility model registration request] Connection blocks 8, 8 are installed at symmetrical positions on both the left and right sides of the fluid pressure cylinder 7 across the axis of the fluid pressure cylinder 7.
are attached, and the end faces of the connecting blocks 8, 8 on the side facing away from the axis are connected with bolts 13 via the U-shaped protection member 12, and the protection surface portion 12a of the protection member 12 and the both A pipe 1 for supplying and discharging working fluid to and from the fluid pressure cylinder 7, with connecting blocks 8, 8 positioned vertically in a direction orthogonal to the axis of the fluid pressure cylinder 7.
1 on each side of the connection blocks 8, 8, and the protective surface portion 12a of the protective member 12 and the side surfaces of the connection blocks 8, 8. The structure of a dozer cylinder installed in a space sandwiched between