CN111256898A - Brake shoe braking force testing component - Google Patents
Brake shoe braking force testing component Download PDFInfo
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- CN111256898A CN111256898A CN202010119567.6A CN202010119567A CN111256898A CN 111256898 A CN111256898 A CN 111256898A CN 202010119567 A CN202010119567 A CN 202010119567A CN 111256898 A CN111256898 A CN 111256898A
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- brake
- brake shoe
- sensor
- force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
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Abstract
The invention discloses a brake shoe braking force testing component, which comprises a brake shoe and a brake head, wherein a first sensor for monitoring braking force is arranged on the brake head, the first sensor is also connected with a force measuring frame, and the force measuring frame protrudes out of the brake head and the mounting surface of the brake shoe by a set size; the brake shoe further comprises a connecting piece, wherein the connecting piece is used for connecting the brake shoe and the brake head, the force measuring frame is in contact with the back surface of the brake shoe in an initial state, and the output signal of the first sensor is zero. By adopting the structure, the first sensor is contacted with the brake shoe through the force measuring frame, so that the influence of heat generated by the brake shoe in the braking process on the first sensor can be reduced, and the monitoring of the braking force under the dynamic condition is adapted; the force measuring frame is in close contact with the brake shoe, so that the first sensor can be guaranteed to have high sensitivity, and the first sensor outputs zero signals to the outside in an initial state rather than the first sensor is subjected to zero setting, so that the accuracy of a monitoring result can be improved.
Description
Technical Field
The invention relates to the technical field of railway vehicle performance testing, in particular to a brake shoe braking force testing component.
Background
The transmission efficiency of the basic brake device of the railway vehicle such as a railway wagon is one of the key parameters for the design and evaluation of the brake system. In the past, the design of railway freight car brake systems in China is evaluated by static brake transmission efficiency, the static brake transmission efficiency is obtained by comparing and calculating the output thrust of a test brake shoe (brake pad) with the air pressure of a brake cylinder when a vehicle is in a static state, although the static brake transmission efficiency can reflect the transmission efficiency of the brake force to a certain extent, the static brake transmission efficiency is still greatly different from the real transmission efficiency, and the existing part for monitoring the brake force under the static condition cannot be used for monitoring under the dynamic condition.
Therefore, how to provide a testing component capable of testing the braking force of the foundation brake device of the railway vehicle under dynamic conditions still remains a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a brake shoe brake force testing component which can test the brake force of a basic brake device of a railway vehicle under a dynamic condition and can simultaneously take the monitoring accuracy and sensitivity into consideration.
In order to solve the technical problems, the invention provides a brake shoe braking force testing component, which comprises a brake shoe and a brake head, wherein a first sensor for monitoring braking force is arranged on the brake head, the first sensor is also connected with a force measuring frame, and the force measuring frame protrudes out of the brake head and the mounting surface of the brake shoe by a set size; the brake shoe further comprises a connecting piece, wherein the connecting piece is used for connecting the brake shoe and the brake head, the force measuring frame is in contact with the back surface of the brake shoe in an initial state, and the output signal of the first sensor is zero.
By adopting the structure, the first sensor is arranged on the brake head and is contacted with the brake shoe through the force measuring frame, so that the influence of heat generated by the brake shoe in the braking process on the first sensor can be reduced, and the brake force can be monitored under the dynamic condition; the force measuring frame is in close contact with the brake shoe, so that the first sensor can be ensured to have higher sensitivity, and once an acting force is generated between the brake head and the brake shoe, the first sensor can monitor and feed back the acting force; and the fact that the signal output by the first sensor is zero in the initial state is equivalent to zero adjustment of the first sensor, and the first sensor is guaranteed not to be stressed in the initial state, so that a foundation can be laid for accurate monitoring of subsequent braking force, once braking is started, the signal output by the first sensor represents the actual braking force between the brake head and the brake shoe, and the monitoring result is more accurate.
Optionally, the connecting piece is a U-shaped bolt, one side rod of the U-shaped bolt penetrates through the brake shoe, the other side rod penetrates through the brake shoe support, and the extending parts of the two side rods of the U-shaped bolt are fixed through a limit baffle and a first fastening nut.
Optionally, in the installation direction of the brake head and the brake shoe, the brake head is provided with a through stepped hole, the stepped hole comprises a large-diameter hole section and a small-diameter hole section, and the large-diameter hole section is relatively close to the brake shoe in an assembled state; the first sensor is installed in the big-diameter hole section, and the data output end of the first sensor extends out of the small-diameter hole section and is fixed through a second fastening nut.
Optionally, the first sensor further comprises a connection end, the force frame being threadedly connected with the connection end.
Optionally, the connecting end portion is further connected with a third fastening nut in a threaded manner, and the third fastening nut can be tightly abutted to the force measuring frame to fix the mounting position of the force measuring frame.
Optionally, the brake shoe is provided with a groove-shaped or protruding positioning portion, the brake shoe support is provided with a positioning matching portion, and the positioning portion is inserted into the positioning matching portion during assembly.
Optionally, the positioning portion is of a convex shape, and a connection hole for the connection member to pass through is formed in the positioning portion.
Optionally, the number of the stepped holes is even, and the stepped holes are symmetrically distributed on two sides of the positioning and matching portion, and each stepped hole is located in the middle of the brake head in the width direction.
Drawings
FIG. 1 is a schematic structural view of a brake shoe braking force testing component provided by the present invention;
FIG. 2 is a schematic structural view of a brake head;
FIG. 3 is a side view of a brake shoe brake force test part provided by the present invention;
fig. 4 is a schematic structural view of the connector.
The reference numerals in fig. 1-4 are illustrated as follows:
56 a first sensor, 561 a data output end, 562 a connecting end and 58 a force measuring frame;
61 brake shoe braking force testing component, 611 brake shoe, 611a positioning part, 612 brake head, 612a stepped hole, 612b positioning matching part, 612c connecting part, 612d connecting hole, 613 connecting piece, 614 limit baffle, 615 first fastening nut, 616 second fastening nut and 617 third fastening nut.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The terms "first," "second," and the like, herein are used for convenience in describing two or more structures or components that are identical or similar in structure and/or function, and do not denote any particular limitation as to the importance or order.
Referring to FIGS. 1-4, FIG. 1 is a schematic view of a brake shoe brake force testing component provided by the present invention, FIG. 2 is a schematic view of a brake head, FIG. 3 is a side view of the brake shoe brake force testing component provided by the present invention, and FIG. 4 is a schematic view of a connector.
As shown in FIG. 1, the present invention provides a brake shoe brake force testing member 61, which may include a brake shoe 611 and a brake head 612, it is known that the brake shoe 611 is a member directly contacting with the wheel of a railway vehicle during braking, which generates high temperature during braking, and if the first sensor 56 for monitoring brake force is directly mounted on the brake shoe 611, the high temperature may cause damage to the brake shoe 611, which is an important reason that the existing testing member for monitoring brake force under static condition cannot be directly applied to dynamic monitoring.
To this end, in an embodiment of the present invention, the first sensor 56 can be mounted to the brake head 612 and the force bracket 58 can be provided in connection with the first sensor 56, the force bracket 58 can be sized to protrude above the brake head 612 and the mounting surface of the brake shoe 611 (the surface of the brake head 612 adjacent the brake shoe 611) and act as a contact member with the brake shoe 611 to avoid direct contact between the first sensor 56 and the brake shoe 611 and to mitigate the effects of high temperatures on the first sensor 56.
Here, the embodiment of the present invention is not limited to the specific value of the set dimension, and in implementation, a person skilled in the art can set the value according to actual needs. Generally, the set size will not be so large, and may be set, for example, between 1mm and 2 mm.
Further, a connecting piece 613 can be included, and the connecting piece 613 can be used for connecting the brake shoe 611 and the brake head 612, and can make the force measuring frame 58 contact with the back surface of the brake shoe 611 (the surface of the brake shoe 611 adjacent to the brake head 612) in the initial state, and the output signal of the first sensor 56 is zero.
By adopting the structure, the force measuring frame 58 is in close contact with the brake shoe 611, so that the first sensor 56 can be ensured to have higher sensitivity, and once the acting force is generated between the brake head 612 and the brake shoe 611, the first sensor 56 can monitor and feed back the acting force; the fact that the signal output by the first sensor 56 in the initial state is zero is equivalent to zero adjustment of the first sensor 56, and it can be ensured that the first sensor 56 in the initial state is not stressed, so that a foundation can be laid for accurate monitoring of subsequent braking force, and once braking is started, the signal output by the first sensor 56 in the initial state represents the actual braking force between the brake head 612 and the brake shoe 611.
In a specific embodiment, referring to fig. 4, the connecting member 613 may be a U-shaped pin, one side of the U-shaped pin may pass through the brake shoe 611, the other side may pass through the brake head 612, and after the U-shaped pin is installed, the protruding parts of the two sides of the U-shaped pin may be fixed by a limit stop 614 and a first fastening nut 615 to prevent the brake shoe 611 and the brake head 612 from moving axially relative to each other.
The distance H between the two side rods of the U-shaped bolt can be changed as required to meet the installation requirement between the force measuring frame 58 and the brake shoe 611.
In addition to the U-shaped pin, the connecting member 613 may also have other structures, such as a combination of a threaded rod and a nut.
With reference to fig. 1 and 2, in the installation direction of the brake head 612 and the brake shoe 611, which is the thickness direction of the brake head 612, the brake head 612 may be provided with a through stepped hole 612a, the stepped hole 612a includes a large diameter hole section and a small diameter hole section, and in the assembled state, the large diameter hole section is closer to the brake shoe 611 than the small diameter hole section; the first sensor 56 may be mounted to the large diameter bore section and the data output end 561 of the first sensor 56 may protrude from the small diameter bore section and may be secured by the second fastening nut 616 to ensure secure securement of the first sensor 56 to the brake head 612.
At the end opposite to the data output end 561, the first sensor 56 may further have a connection end 562, and the force measuring frame 58 may be screwed to the connection end 562 and partially protrude from the stepped hole 612a to meet the requirement of the aforementioned set dimension, and after the installation position of the force measuring frame 58 is determined, a third fastening nut 617 that is also screwed to the connection end 562 may be screwed, so that the third fastening nut 617 abuts against the force measuring frame 58, and the installation position of the force measuring frame 58 is fixed.
The brake shoe 611 may be provided with a groove-type or protrusion-type positioning portion 611a, the brake head 612 may be provided with a positioning engagement portion 612b, and the positioning engagement portion 612b may be shaped to match the positioning portion 611a, specifically, if the positioning portion 611a is protrusion-type (in the drawings), the positioning engagement portion 612b may be groove-type, and if the positioning portion 611a is groove-type, the positioning engagement portion 612b may be protrusion-type, and the positioning portion 611a may be inserted into the positioning engagement portion 612b at the time of assembly.
In the embodiment of the drawings, the positioning portion 611a of the brake shoe 611 may be a protrusion, and the positioning portion 611a and the brake head 612 may be provided with a connecting hole 612d for passing through the two side rods of the connecting member 613.
The quantity of the stepped holes 612a can be even number, and the symmetrical distribution is on both sides of the location matching part 612b, and each stepped hole 612a can be located in the middle position of the width direction of the brake head 612, thus, the brake head 612 is also designed to be symmetrical in the width direction, both side walls of the width direction of the brake head 612 are not provided with slots or holes, the strength of both sides of the width direction of the brake head 612 is even, in the process of braking force transmission, the stress on both sides of the width direction of the brake head 612 is also even, which is beneficial to ensuring the transmission direction of the braking force, and further the accuracy of monitoring can be improved.
The brake head 612 is further provided with a connecting portion 612c on the side facing away from the brake shoe 611 for connecting with the connecting assembly 62, and the structure of the connecting portion 612c is not limited herein, but can refer to the prior art.
It is emphasized that while the brake shoe brake force test member provided by the present invention was originally designed to solve the problem of dynamic brake force measurement of railway car foundation brakes, it does not mean that the test member can only be measured under dynamic conditions, and that the brake shoe brake force test member provided by the present invention is equally applicable under static conditions.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (8)
1. A brake shoe brake force test assembly, comprising a brake shoe (611) and a brake head (612), wherein a first sensor (56) for monitoring brake force is mounted on the brake head (612), and a force measuring frame (58) is further connected to the first sensor (56), and the force measuring frame (58) protrudes from the brake head (612) and is set to a dimension with respect to a mounting surface of the brake shoe (611);
the brake block further comprises a connecting piece (613), wherein the connecting piece (613) is used for connecting the brake shoe (611) and the brake head (612), the force measuring frame (58) is in contact with the back surface of the brake shoe (611) in an initial state, and the external output signal of the first sensor (56) is zero.
2. The brake shoe brake force test assembly according to claim 1, wherein the connector (613) is a U-shaped bolt, one side bar of the U-shaped bolt passes through the brake shoe (611), the other side bar passes through the brake head (612), and the protruding parts of the two side bars of the U-shaped bolt are fixed by a limit stop (614) and a first fastening nut (615).
3. The brake shoe brake force test member according to claim 1, wherein, in the mounting direction of the brake head (612) and the brake shoe (611), the brake head (612) is provided with a through-going stepped bore (612a), the stepped bore (612a) comprising a large diameter bore section and a small diameter bore section, the large diameter bore section being relatively close to the brake shoe (611) in the assembled state;
the first sensor (56) is mounted on the large-diameter hole section, and a data output end portion (561) of the first sensor (56) extends out of the small-diameter hole section and is fixed through a second fastening nut (616).
4. The brake shoe brake force test assembly of claim 3, wherein the first sensor (56) further comprises a connection end (562), the force frame (58) being threadedly connected to the connection end (562).
5. The brake shoe brake force test member according to claim 4, wherein the connecting end portion (562) is further threadedly connected with a third fastening nut (617), and the third fastening nut (617) can be abutted against the force measuring frame (58) to fix the installation position of the force measuring frame (58).
6. The brake shoe brake force test member according to claim 3, wherein the brake shoe (611) is provided with a groove-shaped or protrusion-shaped positioning portion (611a), the brake head (612) is provided with a positioning engagement portion (612b), and the positioning portion (611a) is inserted into the positioning engagement portion (612b) when assembled.
7. The brake-shoe brake-force test member according to claim 6, wherein the positioning portion (616a) is of a boss type provided with a coupling hole (612d) through which the coupling piece (613) is passed.
8. The brake shoe brake force test member according to claim 6, wherein the stepped holes (612a) are provided in an even number and are symmetrically disposed on both sides of the positioning engagement portion (612b), and each of the stepped holes (612a) is located at a middle position in a width direction of the brake head (612).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010119567.6A CN111256898B (en) | 2020-02-26 | 2020-02-26 | Brake shoe braking force testing component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010119567.6A CN111256898B (en) | 2020-02-26 | 2020-02-26 | Brake shoe braking force testing component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111256898A true CN111256898A (en) | 2020-06-09 |
| CN111256898B CN111256898B (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010119567.6A Active CN111256898B (en) | 2020-02-26 | 2020-02-26 | Brake shoe braking force testing component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433689A (en) * | 2023-12-14 | 2024-01-23 | 克诺尔车辆设备(苏州)有限公司 | Rebound device, tread brake testing equipment and tread brake testing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415115A (en) * | 1965-12-27 | 1968-12-10 | Westinghouse Air Brake Co | Railway brake shoe with brake force measuring means |
| CN2524996Y (en) * | 2002-03-12 | 2002-12-11 | 襄樊铁路分局襄北机务段 | Work condition detector for locomotive unit brake |
| CN101059398A (en) * | 2007-04-26 | 2007-10-24 | 中国矿业大学 | Disc type brake performance detection method and the device |
| CN106017772A (en) * | 2016-06-14 | 2016-10-12 | 同济大学 | High-precision railway vehicle brake-shoe pressure testing device |
| CN107101768A (en) * | 2017-04-21 | 2017-08-29 | 同济大学 | A kind of dynamic brake shoe pressure measurement apparatus |
-
2020
- 2020-02-26 CN CN202010119567.6A patent/CN111256898B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415115A (en) * | 1965-12-27 | 1968-12-10 | Westinghouse Air Brake Co | Railway brake shoe with brake force measuring means |
| CN2524996Y (en) * | 2002-03-12 | 2002-12-11 | 襄樊铁路分局襄北机务段 | Work condition detector for locomotive unit brake |
| CN101059398A (en) * | 2007-04-26 | 2007-10-24 | 中国矿业大学 | Disc type brake performance detection method and the device |
| CN106017772A (en) * | 2016-06-14 | 2016-10-12 | 同济大学 | High-precision railway vehicle brake-shoe pressure testing device |
| CN107101768A (en) * | 2017-04-21 | 2017-08-29 | 同济大学 | A kind of dynamic brake shoe pressure measurement apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117433689A (en) * | 2023-12-14 | 2024-01-23 | 克诺尔车辆设备(苏州)有限公司 | Rebound device, tread brake testing equipment and tread brake testing method |
| CN117433689B (en) * | 2023-12-14 | 2024-03-08 | 克诺尔车辆设备(苏州)有限公司 | Rebound device, tread brake testing equipment and tread brake testing method |
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| Publication number | Publication date |
|---|---|
| CN111256898B (en) | 2022-05-27 |
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