CN214251491U

CN214251491U - Roller assembly suitable for brake clearance self-adjusting arm endurance test

Info

Publication number: CN214251491U
Application number: CN202022955839.4U
Authority: CN
Inventors: 杨涛; 沈铁军; 胡旭峰
Original assignee: Anji Asia Pacific Brake System Co ltd
Current assignee: Anji Asia Pacific Brake System Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-09-21
Anticipated expiration: 2030-12-09

Abstract

The utility model relates to a wheel components suitable for braking clearance automatic adjustment arm endurance test. The roller assembly comprises a roller shaft, a thin bushing, a roller, a thick bushing and a hexagon nut; the thin bushing and the thick bushing are coaxially sleeved on the middle part of the roller shaft side by side in sequence, the roller shaft is sleeved outside the thin bushing, the hexagon nut is sleeved outside the tail thread of the roller shaft through the thread, and the hexagon nut is screwed in to axially lock the thin bushing and the thick bushing to the head part of the roller shaft. The utility model discloses replace single gyro wheel with the combination of roller bearing + bush, not only part intensity itself has obtained the promotion, and the bush is two-sided lubricated moreover, has reduced a large amount of frictional resistance, has effectively reduced the wearing and tearing between the part, and life has obtained very big increase.

Description

Roller assembly suitable for brake clearance self-adjusting arm endurance test

Technical Field

The utility model relates to a wheel components has specifically designed a wheel components suitable for braking clearance self modulation arm endurance test.

Background

The brake clearance self-adjusting arm endurance test needs to simulate the actual working state, and mainly comprises a brake chamber, a self-adjusting arm, a cam shaft, a roller and the like to form a stress mechanism. The air chamber provides input force for the self-adjusting arm, the self-adjusting arm drives the cam shaft to rotate to impact the roller when working, the air chamber releases pressure, the self-adjusting arm returns to the original position, and a working cycle is completed. Because the number of endurance test cycles is large, generally 20 to 50 ten thousand, if a single roller is used in combination with a roller shaft, the roller and the roller shaft are damaged seriously after one round of test, and are difficult to disassemble in severe conditions, which causes inconvenience to the test.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem in the background art, the utility model provides a wheel components suitable for braking clearance self modulation arm endurance test has designed one set of new wheel components and has replaced original single gyro wheel, reduces its damage degree, makes the life of gyro wheel longer.

The utility model discloses a concrete scheme as follows:

the roller assembly comprises a roller shaft, a thin bushing, a roller, a thick bushing and a hexagon nut; the thin bushing and the thick bushing are coaxially sleeved on the middle part of the roller shaft side by side in sequence, the roller shaft is sleeved outside the thin bushing, the hexagon nut is sleeved outside the tail thread of the roller shaft through the thread, and the thin bushing and the thick bushing are axially locked to the head part of the roller shaft through the hexagon nut.

The thin bushing and the thick bushing are in clearance fit with the roller shaft.

The thickness of the thin bushing is smaller than that of the thick bushing.

The thin lining material is softer than the roller material.

The outer diameters of both ends of the thin bushing are larger than the outer diameter of the middle part of the thin bushing.

The utility model has the advantages that:

the utility model discloses use the combination of roller bearing + bush to replace single gyro wheel, not only part intensity itself has obtained the promotion, and the bush is two-sided lubricated moreover, has reduced a large amount of frictional resistance, has effectively reduced the wearing and tearing between the part, and life has obtained very big increase. Moreover, wear almost always occurs on the bushing, and only the bushing needs to be replaced, depending on the use. And simultaneously, the utility model discloses simple structure is reliable, and equipment, dismantlement are also very convenient.

Drawings

Fig. 1 is a schematic view of the present invention.

Fig. 2 is a schematic view of the usage environment of the present invention.

In the figure: 1. roller shaft, 2, thin bush, 3, roller, 4, thick bush, 5, hexagonal nut, 6, roller shaft mounting arm.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

As shown in fig. 1, the roller assembly is a transmission part of a camshaft and a brake shoe in a brake, and the rotational force of the camshaft is transmitted to the shoes on both sides through 2 sets of roller assemblies, respectively, the roller assembly comprises a roller shaft 1, a thin bush 2, a roller 3, a thick bush 4 and a hexagon nut 5; one end of the roller shaft 1 is of a nut structure, the middle part of the roller shaft 1 is of an optical axis structure, an annular flange structure with the diameter larger than that of the optical axis structure is arranged between the nut structure and the optical axis structure, and the other end of the roller shaft 1 is of a thread structure; the thin bush 2 and the thick bush 4 are coaxially sleeved on the middle part of the roller shaft 1 side by side in sequence, the roller shaft 3 is sleeved outside the thin bush 2, the hexagonal nut 5 is sleeved outside the tail thread of the roller shaft 1 through threads, and the thin bush 2 and the thick bush 4 are axially locked to the head part of the roller shaft 1 through the hexagonal nut 5. The thin bush and the thick bush are locked with the roller shaft by the hexagon nut 5, so that the roller shaft cannot move axially.

In the specific implementation, as shown in fig. 2, the roller assembly is sleeved in the roller shaft mounting arm 6, the annular flange structure of the roller shaft 1 and the thick bushing 4 are sleeved in through holes at two ends of the roller shaft mounting arm 6, and the roller 3 is located in an inner hole groove of the roller shaft mounting arm 6.

The thin bush 2 and the thick bush 4 are in clearance fit with the roller shaft 1, and lubricating oil is required to be coated during installation, so that abrasion is reduced. The rolling shaft 3 and the thin lining 2 are in clearance fit, and lubricating oil is required to be coated during installation, so that abrasion is reduced.

In the concrete implementation, the material of the thin lining 2 is softer than that of the roller 3, the material of the thin lining is softer, the material of the roller is harder, the material of the thin lining 2 is softer and easier to wear, the roller is not easy to wear, and the service life is long.

The outer diameters of the two ends of the thin bush 2 are larger than the outer diameter of the middle part of the thin bush, so that the axial moving range of the roller 3 is limited within the range of the thin bush 2.

Before installation, lubricating oil is required to be coated on each part, and the lubricating oil comprises the inner wall and the outer wall of the thin lining 2, the inner wall of the rolling shaft 3 and the inner wall and the outer wall of the thick lining 4, so that abrasion of parts in the motion process is reduced.

As shown in figure 1, a roller shaft 1 is firstly inserted through a thin bush 2, and the thin bush 2 is installed at the head of the roller shaft 1. As shown in fig. 2, the roller shaft 3 is first placed in the empty slot of the roller shaft mounting arm 6, the roller shaft 1 is sequentially passed through the roller shaft mounting arm 6 and the roller shaft 3, and then is passed out from the other end of the roller shaft mounting arm 6, and the thick bush 4 is then inserted into the gap between the roller shaft 1 and the roller shaft mounting arm 6, so that the roller shaft 1 and the roller shaft mounting arm 6 are tightly connected. Finally, the hexagonal nut 5 is screwed into the tail part of the roller shaft 1 and locked to prevent the thin bush 2, the thick bush 3 and the roller shaft from loosening.

In the use after the installation, the utility model discloses replace single gyro wheel with the combination of roller bearing + bush, not only part intensity itself has obtained the promotion, and the bush is two-sided lubricated moreover, has reduced a large amount of frictional resistance, has effectively reduced the wearing and tearing between the part, and life has obtained very big increase.

Claims

1. The utility model provides a wheel components suitable for brake clearance automatic adjustment arm endurance test which characterized in that: the roller assembly comprises a roller shaft (1), a thin bushing (2), a roller (3), a thick bushing (4) and a hexagon nut (5); the thin bush (2) and the thick bush (4) are coaxially sleeved on the middle part of the roller shaft (1) side by side in sequence, the roller (3) is sleeved outside the thin bush (2), the hexagonal nut (5) is sleeved outside the tail thread of the roller shaft (1) through threads, and the thin bush (2) and the thick bush (4) are axially locked to the head part of the roller shaft (1) through the hexagonal nut (5).

2. The roller assembly suitable for the endurance test of the automatic brake clearance adjusting arm according to claim 1, wherein: the thin bushing (2) and the thick bushing (4) are in clearance fit with the roller shaft (1).

3. The roller assembly suitable for the endurance test of the automatic brake clearance adjusting arm according to claim 1, wherein: the thickness of the thin bushing (2) is smaller than that of the thick bushing (4).

4. The roller assembly suitable for the endurance test of the automatic brake clearance adjusting arm according to claim 1, wherein: the material of the thin lining sleeve (2) is softer than that of the roller (3).

5. The roller assembly suitable for the endurance test of the automatic brake clearance adjusting arm according to claim 1, wherein: the outer diameters of the two ends of the thin bushing (2) are larger than the outer diameter of the middle part of the thin bushing.