JPS6141795Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention has a structure in which a cylindrical outer arm part is inserted between the inner arm part and the outer arm part, which are slidably fitted into the outer arm part by inserting the end thereof into the outer arm part. A fluid pressure cylinder for operation is provided, and sliding plates interposed between both arm portions are distributed and positioned in the circumferential direction on the outer surface of the base end of the inner arm portion and the inner surface of the tip end of the outer arm portion. A shovel in which a cylindrical frame body, which holds a slide plate attached to a bottom wall of the outer arm portion, is attached in such a manner that it can be inserted into and removed from the outer arm portion along the longitudinal direction of the outer arm portion. Regarding work arms.

The above-mentioned arm is designed to be able to extend and contract in order to change the operating trajectory of the bucket, and is designed to be able to extend and contract with a slide plate that reduces sliding resistance and play between both arm parts. , the required amount of sliding plates can be reduced by attaching them to the outer surface of the proximal end of the inner arm portion and the inner surface of the distal end of the outer arm portion so as to be distributed in the circumferential direction thereof, respectively;
Furthermore, the inner arm part is inserted into the outer arm part by holding the slide plate attached to the bottom wall of the outer arm part in a cylindrical frame that can be inserted into and removed from the outer arm part along its longitudinal direction. It can be removed so as not to get in the way when the inner arm is inserted, and the work of assembling the sliding plate after inserting the inner arm can be done while moving the cylindrical frame along its longitudinal direction relative to the outer arm. Although this can be done simply by inserting it into a predetermined position and fixing it, it has the following disadvantages.

In other words, when replacing the sliding plate on the bottom wall of the outer arm section due to wear, etc., it is a tedious task to remove the cylindrical frame pressed against the outer arm section by the inner arm section. There was an inconvenience.

The present invention was developed with the above-mentioned circumstances in mind, and its purpose is to make it possible to easily and quickly extract the cylindrical frame through simple modification that makes effective use of the original structure. It is intended to be fake.

The configuration of the present invention is such that, in the first shovel working arm, a connecting member for the extraction operation bolt to the cylindrical frame is attached to the inner arm portion so as to be integrally movable, and as the both arm portions are extended. The present invention is characterized in that the cylindrical frame is configured to be able to be extracted and operated.

In other words, we focused on the fact that both the inner and outer arm parts are expanded and contracted by hydraulic cylinders, and
Taking advantage of this fact, the connecting member for the extraction operation bolt to the cylindrical frame is attached to the inner arm part.
By attaching it movably and with simple modification,
By extending both arms using hydraulic cylinders, the cylindrical frame can be easily and quickly extracted. Now I can avoid the inconvenience.

Embodiments of the present invention will be described in detail below based on the drawings.

As shown in FIG. 1, the supporting arm 2a of the earth removal plate 2 is attached to a traveling machine base equipped with a crawler traveling device 1 so that it can be raised and lowered by a hydraulic cylinder 3, and the swivel base 4 is connected to a hydraulic motor (not shown). The bracket 5 for supporting the first arm is mounted on the swivel base ₄ so as to be rotatable around the vertical axis X ₂ using a hydraulic cylinder 6. , a first arm 7 is attached to the bracket 5 so that it can be moved up and down by a hydraulic cylinder 8, a second arm 9 is attached to the first arm 7 so that it can be moved up and down by a hydraulic cylinder 10; A bucket 11 is attached to the arm 9 so as to be swingable by means of a hydraulic cylinder 12, thereby forming a bucket hoe which can also be used as a dozer and which can carry out earth removal work and ground excavation work.

As shown in FIGS. 1 to 5, the second arm 9 is constructed by connecting a rectangular cylindrical inner arm portion 9a with a bucket 11 attached to the tip to the first arm 7.
A rectangular cylindrical outer arm portion 9 whose base end is pivoted to
The outer arm portion 9 is slidably fitted into the inner arm portion 9b, and the outer arm portion 9
A first sliding plate 13 made of synthetic resin that comes into contact with the inner surface of the outer arm portion 9b is attached, and a first sliding plate 13 made of synthetic resin that comes into contact with the outer surface of the inner arm portion 9a is attached to each of the four sides of the tip end of the outer arm portion 9b. 2 sliding plate 14...
Furthermore, a hydraulic cylinder 15 for moving the inner arm portion 9a in and out is attached to both arm portions 9.
It is constructed so that the operating locus of the bucket 11 can be changed in order to excavate the bottom of a trench of different depth by extending and contracting the second arm 9 by installing it between the bucket a and the bucket 9b, and The structure is such that the second arm 9 can be expanded and contracted with little sliding resistance and play by the first and second sliding plates 13 and 14 that are locally positioned in the longitudinal direction of the arm.

Also, a mounting bracket 16 for a bucket operating hydraulic cylinder 12 is attached to the upper wall of the inner arm portion 9a.
is provided on the upper wall of the outer arm portion 9b.
The bracket insertion groove 17 is inserted into the outer arm portion 9.
The inner arm portion 9a is formed in a state in which it is open at the tip end of the outer arm portion 9b.
The connector is configured so that it can be inserted and assembled by moving it rearward from its tip end.

The first sliding plate 13... is connected to the inner arm portion 9a.
In order to attach the sliding plates 13 to the inner arm portion 9a, a cylindrical frame 18 that locks and holds each sliding plate 13 in a manner movable in the plane direction thereof and detachable in a direction perpendicular to the plane direction thereof. and the inner arm part 9
Bolts 19 and 20 for pressing the upper and left side of each slide plate 13 toward the outer arm portion 9b are attached to the upper and left side walls of a, and the upper and left slide plates 13 and bolt 19,2
0, there is a metal plate-shaped body 21a for pressing the sliding plate,
21b is interposed therebetween.

The second sliding plate 14... is connected to the outer arm portion 9b.
In order to attach it to the left and right side walls of the outer arm portion 9b, the left and right slide plates 14 are fixed so that they cannot move in the direction of the surface thereof and in a direction perpendicular to the direction of the surface thereof. Cylindrical frames 22, 22 are provided to be removably locked and supported, and the upper one of each slide plate 14 is attached to the frame 23, which is removably bolted to the upper wall of the outer arm portion 9b. A bolt 23a is attached to the bottom wall of the outer arm portion 9b, and a bolt 23a is attached to the bottom wall of the outer arm portion 9b to fix the lower part of each sliding plate 14... An arm portion 9 holds a cylindrical frame 24 that locks and supports an object so that it cannot be moved in the surface direction and can be removed in the vertical direction.
The outer arm part Bolts 25 and 26 for pressing the lower and right side of each slide plate 14 toward the inner arm portion 9a are attached to the bottom wall and the right side wall of 9b, and the lower and right side Metal plate-shaped bodies 27a, 27b for pressing the sliding plates are interposed between the sliding plates 14, 14 and the bolts 25, 26 that press them.

As shown in FIGS. 5 and 6, a bolt 30 for extracting the cylindrical frame 24 is configured to be able to be screwed into a screw hole 31 formed in the cylindrical frame 24, and a bolt 30 for the extracting operation A plate-shaped bolt connecting member 33 is provided with a hole 32 for penetrating the bolt 30 so that its head 30a is locked.
It is attached to the inner arm portion 9a by welding so as to be integrally movable, so that the cylindrical frame 24 can be pulled out as both arms 9a and 9b are extended. The insertion operation of the cylindrical frame 24 may be performed by abutting it with a hammer or the like, or pushing it in with the bolt connecting member 33 as the arm portions 9a and 9b are shortened. You can do it like this.

The present invention may be applied to the first arm 7 described in the embodiment. In addition to the backhoe, it may also be applied to the arm of a face shovel. Further, as the arm portions 9a and 9b, various shapes such as a hexagonal shape as well as a square shape can be used.

Furthermore, the structure for connecting the extraction operation bolt 30 to the cylindrical frame 24 and the structure for connecting it to the connecting member 33 can be modified in various ways.

[Brief explanation of the drawing]

Figure 1 is a side view of the dozer and backhoe work vehicle.
Fig. 2 is a partially omitted cutaway side view of the second arm, Fig. 3 is a vertical cross-sectional rear view showing the mounting part of the first sliding plate, and Fig. 4 is a vertical cross-sectional rear view showing the mounting part of the second sliding plate. FIG. 5 is a perspective view of the cylindrical frame, and FIG. 6 is a partially cutaway side view showing the mounting state of the extraction operation bolt. 9a... Inner arm portion, 9b... Outer arm portion, 13, 14... Sliding plate, 15... Fluid pressure cylinder, 24... Cylindrical frame, 30... Bolt for extraction operation, 33... Connection member .

Claims (1)

[Scope of utility model registration request] A fluid is provided between the inner arm portion 9a and the outer arm portion 9b, which are slidably fitted into the cylindrical outer arm portion 9b by inserting the tip end thereof into the outer arm portion 9b. A pressure cylinder 15 is provided, and sliding plates 13 and 14 interposed between both arm portions 9a and 9b are provided on the outer surface of the proximal end of the inner arm portion 9a and the outer arm portion 9b.
A cylindrical frame body 24 is attached to the inner surface of the tip part of the outer arm part 9b so as to be distributed in the circumferential direction of the outer arm part 9b. On the other hand, the shovel working arm is attached so as to be removable along its longitudinal direction, and the connecting member 33 of the extraction operation bolt 30 to the cylindrical frame 24 is connected to the inner arm portion 9.
a, the cylindrical frame 24 is attached so as to be integrally movable with the extension of both the arm portions 9a and 9b.
An arm for shovel work, characterized in that it is configured so that it can be extracted and operated.