CN210220906U

CN210220906U - On-line detection device for thickness of friction body of bullet train brake pad

Info

Publication number: CN210220906U
Application number: CN201921109157.2U
Authority: CN
Inventors: Jie Huang; 黄杰; Xiaoyong Xiong; 熊小勇; Zhenghua Liu; 刘正华; Zhengwei Yu; 庾正伟; Qing Jiang; 江庆; Mingjun Zhuo; 卓明骏; Yaping Tian; 田雅萍
Original assignee: China Railway Longchang Materials Co Ltd
Current assignee: China Railway Longchang Materials Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-03-31
Anticipated expiration: 2029-07-16

Abstract

The utility model discloses an on-line measuring device of motor car brake lining friction body thickness, detect the face and detect the reference surface including T shape steel sheet and the first detection face, the second of setting on T shape steel sheet, wherein the second detects the face and highly be H1 to detecting the reference surface, and first detection face is H2 to detecting the height of reference surface, and H1 is greater than H2. Compared with the prior art, the utility model has the positive effects that: the utility model discloses the friction body size that will need key control and wearing and tearing to the limit is established to logical, end size, and the rank that can the key control as required in addition subdivides the size that leads to, end again, enlarges control size grade scope. The utility model discloses can be convenient, high-efficient, accurately on-line measuring go out need key control or wearing and tearing to the brake lining friction member of limit.

Description

On-line detection device for thickness of friction body of bullet train brake pad

Technical Field

The utility model relates to an on-line measuring device of friction piece thickness of motor car brake lining.

Background

The brake pad is used as a core component of a motor car braking system and bears the stability and safety of train braking. The friction body is used as a key material for friction and abrasion of the brake pad, certain abrasion can be generated in the braking process every time, and when the thickness of the friction body is reduced to a certain degree, the brake pad can lose efficacy, so that the braking performance and the operation safety of the motor car are influenced. The motor train unit train can be subjected to daily first-level repair every 2 days, the appearance of the brake lining in the whole train and the residual thickness of the friction body can be checked in the process of maintenance, and the brake lining with the thickness meeting the limit requirement can be replaced. Because the first-stage repair time is short, the number of brake pads to be inspected is large, and the thickness of the friction body of each brake pad is inspected on line. At present, the tool used for the online measurement of the thickness of the friction body is mainly a steel plate ruler or a caliper, the steel plate ruler or the caliper is required to be completely perpendicular to the brake disc in a narrow and small maintenance gallery with insufficient light during detection, the problems of high labor intensity, inconvenience in operation, low efficiency, low detection accuracy, data misreading and the like exist, and the phenomenon that the brake pad is over-service or replaced in advance easily occurs.

Disclosure of Invention

In order to overcome prior art's shortcoming, the utility model provides an on-line measuring device of motor car brake lining friction member thickness can convenient operation, high-efficient, accurately carry out on-line measuring to brake lining friction member thickness, has overcome defects such as the inconvenient operation, inefficiency and the detection error of current brake lining friction member thickness detection method.

The utility model adopts the technical proposal that: the device comprises a T-shaped steel plate, and a first detection surface, a second detection surface and a detection reference surface which are arranged on the T-shaped steel plate, wherein the height from the second detection surface to the detection reference surface is H1, the height from the first detection surface to the detection reference surface is H2, and H1 is larger than H2.

Compared with the prior art, the utility model has the positive effects that:

the utility model discloses the friction body size that will need key control and wearing and tearing to the limit is established to logical, end size, and the rank that can the key control as required in addition subdivides the size that leads to, end again, enlarges control size grade scope. The utility model discloses can be convenient, high-efficient, accurately on-line measuring go out need key control or wearing and tearing to the brake lining friction member of limit.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of the checking fixture of the present invention;

FIG. 2 is a schematic view of detection.

Detailed Description

An on-line thickness detecting device for a friction body of a bullet train brake pad is shown in fig. 1 and comprises: first detection face 1, second detection face 2, detection reference face 3, first fillet 4, second fillet 5, first groove 6, second groove 7 etc. of disappearing, wherein:

the second detection surface 2 is a through end of the detection tool, the height H1 from the second detection surface 2 to the detection reference surface 3 is a size which needs to be monitored in an important way, and the size is 7-9 mm; the first detection surface 1 is a stop end of the detection tool, the height H2 from the first detection surface 1 to the detection reference surface 3 is the wear limit size of the brake pad friction body, and the size is 5-7 mm; the first round angle 4 and the second round angle 5 are arranged at corners at two ends of the detection reference surface 3, are used for preventing the detection tool from scratching a motor car brake disc, and have the size of R0.5-1 mm; the first and second air-removing

grooves

6 and 7 are avoiding grooves for preventing the friction body from interfering with the checking tool during detection.

The material of the checking fixture is carbon steel or tool steel, the small detection space among the motor car brake clamp, the brake pad and the brake disc and the portability of the checking fixture are considered, and the overall dimension of the checking fixture is designed to be 90-120 mm long, 10-30 mm wide and 10-15 mm high. The checking fixture is firstly subjected to linear cutting to process a T-shaped profile. And carrying out heat treatment after linear cutting to ensure the necessary rigidity and wear resistance of the gauge. And then, processing each detection surface by accurate grinding to ensure the sizes from the first detection surface 1 and the second detection surface 2 to the detection reference surface 3 and the roughness of each detection surface. The roughness of each detection surface is guaranteed to be within Ra0.8, and the brake disc and the brake pad friction body are mainly prevented from being damaged by the detection tool in the detection process. And finally, deburring and cleaning the qualified checking tools meeting the size requirements.

Utilize the utility model discloses a method that on-line measuring device carries out on-line measuring to motor car brake lining friction piece thickness includes following step:

step one, attaching a detection reference surface 3 of a detection tool to a brake disc surface;

step two, detecting whether the thickness of the friction body is surplus by using a second detection surface 2:

the second detection surface 2 is attached to the pad friction body (as shown in fig. 2): if the second detection surface 2 can not enter, judging that the thickness of the brake pad friction body is surplus, and not needing important monitoring in the near future; if the second detection surface 2 can enter, performing the third step;

step three, detecting whether the friction body is worn to the limit by using the first detection surface 1:

the first detection surface 1 is attached to the pad friction body (as shown in fig. 2): if the first detection surface 1 can not enter, judging that the brake pad friction body is about to wear to the limit, and performing important monitoring on the brake pad friction body in the near term; if the first detection surface 1 can go forward, the abrasion of the brake pad friction body is judged to be limited, and the brake pad needs to be replaced immediately.

The utility model discloses a detection principle: attaching a detection reference surface 3 of a detection tool to a brake disc surface, and attaching a brake pad friction body to a through end detection surface 2 and a dead end detection surface 1 of the detection tool respectively (figure 2): the detection surface 2 can not be detected, and the thickness margin of the brake pad friction body is shown; the detection surface 2 can enter, and the detection surface 1 cannot enter, which indicates that the brake pad friction body is worn to the limit soon, and important monitoring is needed in the near term; the detection surface 1 can go forward, which indicates that the friction body of the brake pad is worn to the limit and the brake pad needs to be replaced.

Claims

1. The utility model provides an on-line measuring device of bullet train brake lining friction member thickness which characterized in that: the device comprises a T-shaped steel plate, a first detection surface, a second detection surface and a detection reference surface, wherein the first detection surface, the second detection surface and the detection reference surface are arranged on the T-shaped steel plate, the height from the second detection surface to the detection reference surface is H1, the height from the first detection surface to the detection reference surface is H2, and H1 is larger than H2.

2. The device for detecting the thickness of the friction body of the bullet train brake pad according to claim 1, wherein: and corners at two ends of the detection reference surface are provided with fillets.

3. The device for detecting the thickness of the friction body of the bullet train brake pad according to claim 2, wherein: the radius of the fillet is 0.5-1 mm.

4. The device for detecting the thickness of the friction body of the bullet train brake pad according to claim 1, wherein: and the corners from the first detection surface and the second detection surface to the detection reference surface are provided with air elimination grooves.

5. The device for detecting the thickness of the friction body of the bullet train brake pad according to claim 1, wherein: the size of the H1 is 7-9 mm; the size of the H2 is 5-7 mm.

6. The device for detecting the thickness of the friction body of the bullet train brake pad according to claim 1, wherein: the T-shaped steel plate is made of carbon steel or tool steel, and has the overall dimensions of 90-120 mm in length, 10-30 mm in width and 10-15 mm in height.

7. The device for detecting the thickness of the friction body of the bullet train brake pad according to claim 1, wherein: the roughness of the first detection surface, the second detection surface and the detection reference surface is within Ra0.8.