CN215926135U

CN215926135U - Excavator forearm pinhole structure

Info

Publication number: CN215926135U
Application number: CN202121058185.3U
Authority: CN
Inventors: 杨晓东
Original assignee: Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
Current assignee: Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2022-03-01
Anticipated expiration: 2031-05-18

Abstract

The utility model relates to a small arm pin hole structure of an excavator, in particular to a small arm pin hole structure of the excavator, which is easy to produce, process, maintain and comprises a pin hole seat, wherein a through basic hole is arranged in the pin hole seat, a spacer bush is connected in the basic hole in an interference fit manner, a through mounting hole is arranged in the spacer bush, the diameters of two ends of the mounting hole are smaller than the diameter of the middle part of the mounting hole, two ends in the mounting hole are respectively connected with a bushing, a through pin hole is arranged in the bushing, the thickness of the bushing is 10-15mm, the spacer bush is additionally arranged between the traditional bushing and the basic hole, the condition that the basic hole is abraded and damaged is avoided, and the service life of the whole is prolonged; simple structure, the change of being convenient for reduces maintenance duration and cost, and economic benefits is high.

Description

Excavator forearm pinhole structure

Technical Field

The utility model relates to a small arm pin hole structure of an excavator, in particular to a small arm pin hole structure of the excavator, which is easy to produce, process, repair and maintain.

Background

During the operation of the excavator, the connecting pin of the excavator bucket and the small arm frequently rotates, the pin and the lining can be abraded, and the pin and the lining can be replaced under the ordinary condition. After the small arm bushing is used for half a year, the small arm pin hole is extruded by the bushing for a long time to deform, the outer end of the base hole of the small arm bushing becomes in an oval horn mouth shape, and the bushing cannot be replaced. A maintenance method is that a lining is installed in a small arm hole, then a gap between the lining and the small arm hole is built up, when next maintenance is carried out, a welding seam is blown off by gas cutting, the built-up welding is replaced again, the maintenance quality is poor, the condition of the small arm is worse and worse, and finally the small arm is replaced. The other maintenance method is that a portable boring machine is used for boring a base hole, then surfacing and boring are carried out until the size of the bushing is reached, then the bushing is replaced, although the requirement of maintenance can be met, equipment such as the portable boring machine and a carbon dioxide gas shielded welding machine needs to be put into the portable boring machine, 2-3 persons, the boring and welding processing time is 2-4 days, all requirements on a maintenance field are met, labor and time are wasted, and the requirement on maintenance personnel is high.

Both of these methods are unsatisfactory, the first being only a good fit and the effect being increasingly poor, eventually only the small arm can be replaced. The second method has the disadvantages of large investment, high requirement, long time, inconvenience and poor economic benefit, and cannot meet the use requirement especially when the construction period is tight.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the prior art, the utility model aims to provide the small arm pin hole structure of the excavator, which is simple in structure, convenient to replace and maintain, high in economic benefit and capable of solving the problems in the prior art.

The technical scheme adopted by the utility model is as follows:

the utility model provides an excavator forearm pinhole structure, includes the pinhole seat, is equipped with the basic hole that runs through in the pinhole seat, the downthehole interference fit of basic be connected with the spacer, be equipped with the mounting hole that runs through in the spacer, the mounting hole both ends diameter is less than the middle part diameter, both ends are connected with the bush respectively in the mounting hole, are equipped with the round pin shaft hole that runs through in the bush.

The thickness of the bushing is 10-15 mm.

And further, the length of the spacer bush is smaller than that of the foundation hole, and two end faces of the spacer bush are fixedly connected to the inner wall of the foundation hole through welding.

Furthermore, the outer side of the bushing is provided with a flange, the end surface of the inner side of the flange is attached to the end surface of the spacer bush, and the end surface of the outer side of the flange and the end surface of the pin hole seat are on the same plane.

The utility model has the beneficial effects that:

1. a spacer bush is added between the traditional bushing and the foundation hole, so that the situation that the foundation hole is abraded and damaged is avoided, and the service life of the whole body is prolonged;

2. simple structure, the change of being convenient for reduces maintenance duration and cost, and economic benefits is high.

Drawings

FIG. 1 is a schematic view of a half-section structure of an embodiment of the present invention;

FIG. 2 is a schematic view of a second half-section of an embodiment of the present invention;

FIG. 3 is a schematic view of a three-half section structure according to an embodiment of the present invention.

In the figure: 1. the pin hole seat comprises a pin hole seat, 101 a base hole, 2 a spacer bush, 201 a mounting hole, 3 a bushing, 301 a pin hole and 302 a flanging.

Detailed Description

The utility model is described in detail below with reference to the following figures and detailed description:

in the first embodiment, as shown in fig. 1:

the utility model provides an excavator forearm pinhole structure, includes pinhole seat 1, is equipped with the basic hole 101 that runs through in the pinhole seat 1, basic hole 101 in interference fit be connected with spacer 2, be equipped with the mounting hole 201 that runs through in the spacer 2, mounting hole 201 both ends diameter is less than the middle part diameter, both ends are connected with bush 3 respectively in the mounting hole 201, are equipped with the round pin axle hole 301 that runs through in the

bush

3, 2 thickness of bush be 10-15mm, increase spacer 2 between traditional bush 3 and basic hole 101, when using, the wearing and tearing be the spacer, the basic hole can not wear and tearing, consequently only need together take off spacer and bush when changing, more new spacer and bush can resume the use.

Example two, as shown in fig. 2:

2 length of spacer bush be less than basic hole 101 length, 2 both ends faces of spacer bush pass through welded fastening and connect on basic hole 101 inner wall, with 2 both ends of spacer bush through welded mode and basic hole 101 fixed connection, prevent that spacer bush 2 from taking place to rotate and then causing wearing and tearing to basic hole 101, stop the wearing and tearing phenomenon of basic hole 101 completely.

Example three, as shown in fig. 3:

further, a flange 302 is arranged on the outer side of the bushing 3, the end face of the inner side of the flange 302 is attached to the end face of the spacer 2, the end face of the outer side of the flange 302 is on the same plane with the end face of the pin hole seat 1, and the flange 302 is added to prevent the outer end of the basic hole 101 from being extruded and deformed into a horn mouth shape, so that unrepairable damage is caused, the service life is prolonged, and meanwhile, observation and maintenance are facilitated.

The concrete application methods of the small arm pin hole structure of the excavator provided by the utility model are as follows:

one is that the basic hole 101 is processed according to a new structure when the excavator is produced, then the matched spacer bush 2 and the matched bush 3 are processed, the supply of spare parts is ensured, and when the spacer bush 2 and the bush 3 are replaced, the finished spacer bush 2 and the finished bush 3 are directly replaced;

the other method is that the existing excavator utilizes a portable boring machine to bore the base hole 101 according to a new structure, the outer diameter of the spacer bush 2 is processed according to the size of the new base hole 101 in a matched mode, the inner diameter of the spacer bush 2 is processed according to the size of the outer diameter of the bushing 3, and then the spacer bush is replaced.

Claims

1. The utility model provides an excavator forearm pinhole structure which characterized in that: including pinhole seat (1), be equipped with basic hole (101) that run through in pinhole seat (1), basic hole (101) in interference fit be connected with spacer (2), be equipped with mounting hole (201) that run through in spacer (2), mounting hole (201) both ends diameter is less than the middle part diameter, both ends are connected with bush (3) respectively in mounting hole (201), are equipped with through pinhole hole (301) in bush (3).

2. The excavator forearm pin hole structure of claim 1, wherein: the thickness of the lining (2) is 10-15 mm.

3. The excavator forearm pin hole structure of claim 1, wherein: the length of the spacer bush (2) is smaller than that of the base hole (101), and two end faces of the spacer bush (2) are fixedly connected to the inner wall of the base hole (101) through welding.

4. The excavator forearm pin hole structure of claim 3, wherein: the outer side of the bushing (3) is provided with a flanging (302), the end face of the inner side of the flanging (302) is attached to the end face of the spacer bush (2), and the end face of the outer side of the flanging (302) and the end face of the pin hole seat (1) are on the same plane.