JPH0810598Y2 - Built-in pipe work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a working machine device for a hydraulic power shovel.

(Prior Art) A hydraulic power shovel working machine according to the prior art will be described with reference to FIGS. 7 and 8.

FIG. 7 shows a perspective view of the working machine, in which the first boom is attached to the vehicle body 1.
The second boom 400 is pivotally attached to the tip end side of the first boom 200 so that the second boom 400 is pivotable to the left and right, and the third boom 5 is horizontally attached to the tip end side of the second boom 400. It is pivotally mounted.

The first boom 200 and the second boom 400 are connected by the offset cylinder 6 on the right side of the boom, and
The 200 and the third boom 5 are connected on the left side of the boom by a four-bar linkage mechanism by an offset link 7, and the third cylinder 5 is moved to the first boom by the horizontal swing of the second boom 400 by the offset cylinder 6. It can be offset in the left-right direction in parallel with the boom 200.

An arm 9 having a bucket 8 is pivotally attached to the third boom 5 so as to be vertically swingable, and the third boom 5 and two brackets 10 fixed to the arm 9 are connected by an arm cylinder 11. Then, the arm 9 is oscillated and the bracket 10 of the arm 9 and the bucket 8 rotatably attached to the tip of the arm 9 are connected by a bucket cylinder 12, and the bucket 9 is rotatably driven. .

FIG. 8 shows a view in which the first boom 200 and the second boom 400 are connected, and partition plates 201 and 202 each having a circular hole are provided at both ends of the first boom 200 having a box-shaped cross section, and are shown from the vehicle body 1. Partition plate above hydraulic piping leading to actuator
It is inserted in the round holes of 201 and 202.

Further, partition plates 401 and 402 having round holes are provided at both ends of the second boom 400 having a box-shaped cross section, and the first boom 2
A hydraulic pipe that passes through the inside of 00 to reach an actuator (not shown) is inserted through the round holes of the partition plates 401 and 402.

(Problems to be solved by the invention) Due to the structure as described above, rainwater and the like enter the inside of the boom through the circular holes in the partition plate, and because the water that enters the boom is difficult to drain, the boom inner wall is rusted. There are problems such as the occurrence of corrosion and corrosion.

(Means for Solving the Problems) In order to solve the above problems, a first invention is to block both longitudinal end openings of a box-shaped cross section with partition plates, and connect brackets to the outside of both side partition plates. In a working machine of a hydraulic power shovel that has a mounted boom and a hydraulic cylinder that drives the boom and bucket, insert the cylinder pipe of the hydraulic cylinder into the insertion pipe that passes through the inside of the boom and is installed between the partition plates on both sides of the boom. According to a second aspect of the invention, there is provided an insertion pipe projecting from the partition plates on both sides and an end face of the insertion pipe which comes into contact with the insertion pipe and comes off. A work machine with a built-in pipe, which is composed of a boom having a holding metal fitting attached to a partition plate for preventing dashi and a boom having a sealing member that is inserted between the holding metal fitting and the partition plate and that contacts and seals the insertion pipe, A third aspect of the present invention is the same as the first aspect, wherein the flange is inserted into the through hole of the partition plate and is attached to the partition plate that is inserted into the inner diameter of the insertion tube and holds the insertion tube; A fourth aspect of the present invention is a built-in pipe type working machine including a boom having a sealing member that is inserted between the partition plate and seals.
The insertion tube of any of the third to third inventions is a working machine with a built-in pipe made of a resin pipe.

(Operation) Since it is configured as described above, it is possible to prevent rust and corrosion without rainwater or the like flowing out of the boom through the insertion pipe and entering the inside of the work machine boom.

(Embodiment) A working machine for a hydraulic power shovel according to the present invention will be described with reference to FIGS. 1 to 6.

FIG. 1 shows a perspective view of a working machine, in which a first boom 2 is pivotally attached to a vehicle body 1 by a pin 3 and one end of a second boom 4 is a first boom.
The boom 2 and the other end are pivotally attached to the third boom 5 so as to be swingable.

The first boom 2 and the second boom 4 are connected by an offset cylinder 6 on the right side of the boom.
The third boom 5 and the third boom 5 are connected by an offset link 7 on the left side of the boom. An arm 9 having a bucket 8 is pivotally attached to the third boom 5, and the third boom 5 and the two brackets 10 fixed to the arm 9 are an arm cylinder.
Connected by 11.

The bracket 10 of the arm 9 and the bucket 8 are connected by a bucket cylinder 12.

2 and 3 show the first embodiment, FIG. 2 is a sectional view of the first boom 2, and FIG. 3 is a partially enlarged view of FIG.

In FIG. 2, the first boom 2 has a box-shaped cross section, and the partition plate 2 has a round hole at the center at both ends of the first boom 2.
1, 22 are provided, a gasket 24 is sandwiched between the circular holes of both partition plates 21 and 22, and a flange 24 is fixed by a bolt 27. Further, a vinyl tube 25 is fitted between the flanges 24, and the vehicle body is placed in the vinyl tube 25. A hydraulic pipe 26 extending from 1 to the hydraulic cylinder 11 that drives the arm 9 and the hydraulic cylinder 12 that drives the bucket 8 is inserted. 28 and 28 'are connecting brackets provided at both ends of the first boom.

4 and 5 show a second embodiment, FIG. 4 is a sectional view of the second boom 4, and FIG. 5 is a partially enlarged view of FIG.

In FIG. 4, the second boom 4 has a box-shaped cross section, and partition plates 41, 42 each having a circular hole at the center at both ends of the second boom.
A rigid vinyl chloride pipe 45 is made to communicate with the round holes of both partition plates 41 and 42, and both ends of the rigid vinyl chloride pipe 45 are clamped with a ring-shaped sponge seal 44 and clamp metal fittings 43, and separated by bolts 46. It is fixed to the plates 41 and 42. Incidentally, 48 and 48 'are brackets provided at both ends of the second boom.

Then, the first boom 2 is inserted from the vehicle body 1 and the arm 9
A hydraulic pipe 26 reaching the hydraulic cylinder 11 for driving the hydraulic cylinder 11 and the hydraulic cylinder 12 for driving the bucket 8 is inserted through the hard vinyl chloride pipe 45.

FIG. 6 is a sectional view of a pipe built-in type working machine to which the first embodiment and the second embodiment are applied. The first boom 2 is the first embodiment and the second boom 4 is the second embodiment. It is applied.

(Effects of the Invention) With the above-described configuration, rainwater does not enter the inner wall of the box-shaped cross section, and rainwater that enters from the end of the second boom or the first boom is discharged to the outside through the insertion tube. Therefore, corrosion of the inner wall of the boom can be prevented.

Moreover, since the insertion tube is made of a resin tube such as a vinyl tube or a hard vinyl chloride, the tube itself does not rust or corrode.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a working machine, FIG. 2 is a sectional view of a first boom, FIG. 3 is an enlarged sectional view of FIG. 2, and FIG. 4 is a sectional view of a second boom. , FIG. 5 is an enlarged sectional view of FIG. 4, and FIG.
FIG. 7 is a cross-sectional view when the boom and the second boom are connected, FIG. 7 is a perspective view of a conventional working machine, and FIG. 8 is a cross-sectional view when the first boom and the second boom are connected. 1 ... Car body, 2 ... First boom, 3 ... pin, 4 ... Second boom, 5 ... Third boom, 6 ... Offset cylinder, 7 ... Offset link, 8 ... Bucket, 9 ... …
Arm, 10 …… Bracket, 11 …… Arm cylinder, 12
...... Bucket cylinder

Claims (4)

[Scope of utility model registration request] 1. A hydraulic system having a boom having both end openings in the longitudinal direction of the box-shaped cross section closed by partition plates, and a boom having connecting brackets attached to the outer sides of the partition plates, and a hydraulic cylinder for driving the boom and the bucket. In a power shovel work machine, the cylinder piping to the hydraulic cylinder is arranged so as to pass through the inside of the boom and through an insertion pipe mounted between partition plates on both sides of the boom. . 2. An insertion tube projecting from both side partition plates, a retaining metal member attached to the partition plate that abuts against an end surface of the insertion pipe to prevent the insertion pipe from being removed, and is inserted between the retaining metal member and the partition plate. Is
The working machine with a built-in pipe according to claim 1, further comprising a boom having a sealing member that contacts and seals the insertion tube. 3. A flange, which is inserted into the through hole of the partition plate and is attached to the partition plate which is inserted into the inner diameter of the insertion tube and holds the insertion tube, and is inserted between the flange and the partition plate. The working machine with a built-in pipe according to claim 1, comprising a boom having a sealing member for sealing. 4. The working machine for a hydraulic power shovel according to claim 1, wherein the insertion pipe is made of resin and has a built-in pipe.