Railway vehicle and brake device and brake shoe pressure detection device thereof

Abstract

The utility model discloses a railway vehicle and a brake device and a brake shoe pressure detection device thereof, and the brake shoe pressure detection device comprises a brake shoe body and at least two force measurement sensors. The back of the brake shoe body is in contact fit with a brake shoe holder of a brake device; the two force measuring sensors are embedded into the back of the brake shoe body in the normal direction and symmetrically distributed on the two sides of a shoe nose of the brake shoe body, and contacts of the two force measuring sensors extend out of the back of the brake shoe body and are used for being matched with a brake shoe holder in an abutting mode. According to the scheme, the two external contact type force measuring sensors which are symmetrically distributed on the two sides of the shoe nose are embedded in the back of the brake shoe body in the normal direction, so that the brake shoe pressure detection device is simple and convenient in structure, convenient to install and good in reliability, and meanwhile, the change amount of a brake shoe friction body is small.

Description

Technical Field

[0001] The utility model relates to the technical field of railway vehicles, in particular to a railway vehicle and a braking device and a brake shoe pressure detection device thereof. Background Art

[0002] At present, some preliminary results have been achieved in research projects such as on-board monitoring of the performance of 120-1 valves for 20,000-ton heavy-load combination trains on the Daqin Line, collection of coupler force load spectra, and wheel-rail force testing. However, online testing of dynamic brake shoe pressure and dynamic transmission efficiency of the braking system is still blank, which makes it difficult to scientifically analyze the braking performance of vehicles in the train and the influence of typical faults of the braking system on brake cylinder pressure, brake cylinder pressure on brake shoe pressure, braking force on coupler force and longitudinal impulse, and coupler force on wheel-rail force and other vehicle operating conditions.

[0003] The brake shoe of the railway vehicle brake system has an irregular shape and will wear out during use, and this wear is often random, and eccentric wear may occur. In other words, it is difficult to analyze the dynamic brake shoe pressure using a given model.

[0004] At present, the brake shoe pressure detection device commonly used in railway vehicles requires the addition of a sensor mounting frame, which has a complex structure and requires a large amount of modification to the brake shoe friction body. In addition, the number of sensors is large and a force transmission rod structure is required, which has a complex structure and wiring and poor reliability. Utility Model Content

[0005] In view of this, the utility model provides a brake shoe pressure detection device, which can make the brake shoe pressure detection device simple in structure, convenient in installation, and reliable, while requiring little modification to the brake shoe friction body.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A brake shoe pressure detection device, applied to a brake device of a railway vehicle, comprises: a brake shoe body and at least two force measuring sensors;

[0008] The back of the brake shoe body is used to contact and cooperate with the brake shoe support of the braking device;

[0009] The two force sensors are respectively embedded in the back of the brake shoe body along the normal direction and symmetrically distributed on both sides of the shoe nose of the brake shoe body, wherein the contacts of the two force sensors both protrude out of the back of the brake shoe body and are used to abut and cooperate with the brake shoe support.

[0010] Preferably, the back of the brake shoe body is provided with at least two embedded structures along different normal directions, and are symmetrically distributed on both sides of the shoe nose of the brake shoe body;

[0011] The two force sensors are installed one by one in the two embedded structures on the back of the brake shoe body, and their contacts are both protruded out of the embedded structures and are used for abutting and cooperating with the brake shoe support.

[0012] Preferably, the embedding structure comprises an embedding hole.

[0013] Preferably, the embedding hole is a blind hole, and extends from the back side of the brake shoe steel back of the brake shoe body to the friction body of the brake shoe body along the normal direction.

[0014] Preferably, at least two wiring structures connected to the two embedded structures are provided on the side surface of the brake shoe body, for leading out the wires of the two force sensors one by one.

[0015] Preferably, the wiring structure includes a wiring hole.

[0016] Preferably, the number of the force sensors is greater than two, and they are divided into two groups, the two groups of force sensors are respectively embedded in the back of the brake shoe body along the normal direction, and are symmetrically distributed on both sides of the shoe nose of the brake shoe body, wherein the contacts of the two groups of force sensors protrude out of the back of the brake shoe body and are used to abut and cooperate with the brake shoe support.

[0017] Preferably, each group of the force sensors has at least two force sensors, and they are evenly distributed on the side where the shoe nose is located.

[0018] A braking device, applied to a railway vehicle, comprises a brake shoe pressure detection device, wherein the brake shoe pressure detection device is the brake shoe pressure detection device as described above.

[0019] A railway vehicle comprises a braking device, wherein the braking device is the braking device as described above.

[0020] It can be seen from the above technical solution that the brake shoe pressure detection device provided by the utility model can make the brake shoe pressure detection device simple in structure, easy to install, and reliable, by embedding two external-contact force sensors symmetrically distributed on both sides of the shoe nose along the normal direction on the back of the brake shoe body, while requiring little modification to the brake shoe friction body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1A schematic diagram of the structure of a brake shoe pressure detection device provided by an embodiment of the utility model;

[0023] Figure 2 This is a structural schematic diagram of a brake shoe pressure detection device provided in another embodiment of the utility model.

[0024] Among them, 3-1 is the brake shoe body, 3-2 is the force sensor, 3-3 is the wire, 3-4 is the embedding hole, 3-5 is the wiring hole, and 3-6 is the wire protection tube. DETAILED DESCRIPTION

[0025] The utility model discloses a brake shoe pressure detection device, which is a force measuring brake shoe, and is made by modifying the existing high-abrasion brake shoe of a K6 bogie. A sensor mounting hole (circular blind hole) is respectively opened on the back of a brake shoe body and four areas directly contacting a brake shoe support. The central axes of the four sensor mounting holes are all directly opposite to the wheel axle center. Force measuring sensors are installed in the sensor mounting holes, and wires are led out from holes opened at corresponding positions on the side of the brake shoe, thereby avoiding interference between the wires and the brake shoe support. The actual brake shoe pressure is obtained by calculating the resultant force exerted on the four force measuring sensors.

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The brake shoe pressure detection device provided in the embodiment of the utility model is applied to the braking device of a railway vehicle, such as Figure 1 As shown, it includes: a brake shoe body 3-1 and at least two force sensors 3-2;

[0028] The back of the brake shoe body 3-1 is used for contacting and cooperating with the brake shoe support of the braking device;

[0029] The two force sensors 3-2 are respectively embedded in the back of the brake shoe body 3-1 along the normal direction and symmetrically distributed on both sides of the shoe nose of the brake shoe body 3-1, wherein the contacts of the two force sensors 3-2 both protrude out of the back of the brake shoe body 3-1 and are used to abut against the brake shoe support.

[0030] It should be noted that the two force sensors 3-2 are respectively embedded in the back (back side) of the brake shoe body 3-1 along the normal direction of the back of the brake shoe body 3-1, and are symmetrically distributed on both sides of the shoe nose of the brake shoe body 3-1. The contacts of the two force sensors 3-2 all protrude out of the back of the brake shoe body 3-1 and are used to abut and cooperate with the brake shoe support; that is, in this scheme, two external contact (contacts protruding outward) force sensors 3-2 are symmetrically distributed on both sides of the shoe nose in the back of the brake shoe body 3-1 along its normal direction, wherein the force sensors 3-2 are embedded in the normal direction of the position where the back of the brake shoe body 3-1 is located, ensuring that the radial positive pressure of the brake shoe support on the brake shoe body 3-1 at that position can be detected, thereby helping to ensure that the radial positive pressure of the brake shoe on the wheel can be detected, and by calculating the resultant force exerted on the two force sensors 3-2, this is used as the brake shoe pressure; of course, the back of the brake shoe body 3-1 can also be assembled and connected with the brake shoe support.

[0031] In addition, the force sensor 3-2 of the brake shoe pressure detection device is directly embedded in the back of the brake shoe body 3-1 along the normal direction, without adding a sensor mounting frame, the structure is simple, and the brake shoe friction body is slightly modified. There are only two force sensors 3-2, and they directly contact and cooperate with the brake shoe support through their external contacts, without the need for a force transmission rod structure, and the structure is also simple and reliable. Of course, the brake shoe pressure detection device provided by this solution can be used as a force measuring brake shoe, which can be used to detect dynamic brake shoe pressure and static brake shoe pressure, and can also be applied to the braking device of railway freight cars.

[0032] It can be seen from the above technical solution that the brake shoe pressure detection device provided by the embodiment of the utility model can make the brake shoe pressure detection device simple in structure, easy to install, and reliable, by embedding two external-contact force sensors symmetrically distributed on both sides of the shoe nose along the normal direction on the back of the brake shoe body, while requiring little modification to the brake shoe friction body.

[0033] Specifically, Figure 2 As shown, the back of the brake shoe body 3-1 is provided with at least two embedded structures along different normal directions, and are symmetrically distributed on both sides of the shoe nose of the brake shoe body 3-1;

[0034] The two force sensors 3-2 are installed one by one in the two embedded structures on the back of the brake shoe body 3-1, and their contacts are all protruding out of the embedded structures and used to abut against the brake shoe support. Among them, the two embedded structures are equivalent to the installation structures of the two force sensors 3-2, and are both opened along the normal direction of the position of the back of the brake shoe body 3-1, so that the two force sensors 3-2 are respectively embedded along the normal direction of the position of the back of the brake shoe body 3-1. In addition, this solution is designed in this way to facilitate the embedded installation of the force sensors 3-2, and the embedded structure may include an embedded groove or an embedded hole.

[0035] In this scheme, if Figure 2 As shown, the embedding structure includes an embedding hole 3-4, which serves as a sensor installation hole. Among them, the embedding hole 3-4 is a circular embedding hole, and the central axis of the circular embedding hole coincides with the normal direction of the location, and the central axis of the circular embedding hole is also facing the wheel axis. In addition, this solution uses the embedding hole 3-4 as the embedding structure, which has a simple structure and is easy to embed. In addition, in order to ensure that the force sensor 3-2 is embedded along the normal direction, this requires that the force sensor 3-2 is coaxially installed in the circular embedding hole.

[0036] Furthermore, the embedding hole 3-4 is a blind hole, and extends from the back of the brake shoe steel back of the brake shoe body 3-1 to the friction body of the brake shoe body 3-1 along the normal direction, so as to avoid large changes to the friction body of the brake shoe body 3-1, and also facilitate the pressure detection of the brake shoe support on the back of the brake shoe body 3-1; of course, the pressure of the brake shoe support on the back of the brake shoe body 3-1 is the same as the pressure of the brake shoe body 3-1 on the wheel. In addition, the brake shoe body 3-1 can be made by directly drilling a universal brake shoe for heavy-duty trucks, which is simple to process and has low cost.

[0037] Furthermore, at least two wiring structures connected to the two embedded structures are provided on the side of the brake shoe body 3-1 for leading out the wires 3-3 of the two force sensors 3-2 one by one to avoid interference between the wires 3-3 of the two force sensors 3-2 and the brake shoe support.

[0038] In this scheme, if Figure 2 As shown, the wiring structure includes wiring holes 3-5, which are distributed on the inner side of the brake shoe body 3-1. That is, the side of the brake shoe body 3-1 is provided with at least two wiring holes 3-5, one connected to the two embedding holes 3-4, for leading out the wires 3-3 of the two force sensors 3-2 one by one. In this way, the wiring of the two force sensors 3-2 can be simplified and the reliability is good. In addition, as Figure 1 As shown, in order to facilitate the protection of the lead-out portion of the wire 3-3 of the force sensor 3-2, a wire protection tube 3-6 for the lead-out portion of the wire 3-3 to pass through can be installed (pluggable) at the outer port of the wiring hole 3-5; accordingly, the wire protection tube 3-6 can be installed at the outer ports of all wiring holes 3-5; of course, the wire protection tube 3-6 can also be a wire protection sleeve.

[0039] Specifically, Figure 1As shown, the number of force sensors 3-2 is greater than two and is divided into two groups. The two groups of force sensors 3-2 are respectively embedded in the back of the brake shoe body 3-1 along the normal direction and are symmetrically distributed on both sides of the shoe nose of the brake shoe body 3-1. The contacts of the two groups of force sensors 3-2 are both extended out of the back of the brake shoe body 3-1 and are used to abut against the brake shoe support. This design of the scheme helps to improve the detection accuracy of the brake shoe pressure detection device.

[0040] Furthermore, each group of force sensors 3-2 has at least two force sensors 3-2, and they are evenly distributed on the side where the shoe nose is located. Each group of force sensors 3-2 has two force sensors 3-2, and they are evenly distributed on the side where the shoe nose is located, and the two force sensors 3-2 of one group are symmetrically distributed one by one with the two force sensors 3-2 of the other group about the shoe nose, which can help to further improve the detection accuracy of the brake shoe pressure detection device.

[0041] That is to say, the brake shoe pressure detection device provided by this scheme can be processed from the high-abrasion brake shoe of the K6 bogie of a railway freight car. The side in contact with the brake shoe support is provided with four sensor mounting holes (i.e., embedded holes) for installing force sensors. The four sensor mounting holes are symmetrically distributed on both sides of the shoe nose, and the central axis of each sensor mounting hole is directly opposite to the wheel axis. When the force sensor is installed in the sensor mounting hole, the wire of the force sensor can be led out from the hole at the corresponding position on the side of the brake shoe body, avoiding interference between the wire and the brake shoe support. Of course, the actual brake shoe pressure is obtained by calculating the combined force of the four force sensors. In addition, this brake shoe pressure detection device uses four force sensors for detection, with a small number of sensors, simple wiring, and good reliability.

[0042] Of course, the brake shoe pressure detection device provided by this solution has the following beneficial effects:

[0043] 1. It can detect the radial positive pressure of the brake shoe on the wheel when the railway vehicle is stationary or moving, with high detection accuracy;

[0044] 2. The wire is led out from the corresponding opening on the side of the brake shoe to avoid interference between the wire and the brake shoe support;

[0045] 3. The interface size of the force measuring brake shoe (the back of the brake shoe body) is consistent with the existing brake shoe, which is convenient for installation with the brake shoe support and has good repeatability.

[0046] This solution uses the detection and collection functions of the force sensor to detect the brake shoe pressure of vehicles running on the line and collect and analyze it. In addition, the basic brake device dynamic performance test bench can also be used to carry out static tests on the force measuring brake shoe and ground dynamic tests on the brake shoe pressure, which will not be repeated here.

[0047] The embodiment of the utility model also provides a braking device, which is applied to railway vehicles, including a brake shoe pressure detection device, and the brake shoe pressure detection device is the brake shoe pressure detection device described above. Since the present solution adopts the brake shoe pressure detection device described above, it also has corresponding beneficial effects, which can be specifically referred to the previous description and will not be repeated here.

[0048] The embodiment of the utility model also provides a railway vehicle, including a brake device, wherein the brake device is the brake device described above. Since the present solution adopts the brake device described above, it also has corresponding beneficial effects, which can be specifically referred to the above description and will not be repeated here.

[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A brake shoe pressure detection device, applied to a brake device of a railway vehicle, characterized in that: include: A brake shoe body (3-1) and at least two force sensors (3-2); The back of the brake shoe body (3-1) is used for contacting and cooperating with the brake shoe support of the braking device; The two force sensors (3-2) are respectively embedded in the back of the brake shoe body (3-1) along the normal direction and symmetrically distributed on both sides of the shoe nose of the brake shoe body (3-1), wherein the contacts of the two force sensors (3-2) both protrude out of the back of the brake shoe body (3-1) and are used to abut and cooperate with the brake shoe support.

2. The brake shoe pressure detection device according to claim 1, characterized in that: The back of the brake shoe body (3-1) is provided with at least two embedded structures along different normal directions, and the embedded structures are symmetrically distributed on both sides of the shoe nose of the brake shoe body (3-1); The two force sensors (3-2) are installed one by one in two embedded structures on the back of the brake shoe body (3-1), and their contacts are both protruded out of the embedded structures and are used to abut and cooperate with the brake shoe support.

3. The brake shoe pressure detection device according to claim 2, characterized in that: The embedding structure comprises an embedding hole (3-4).

4. The brake shoe pressure detection device according to claim 3, characterized in that: The embedding hole (3-4) is a blind hole and extends from the back side of the brake shoe steel back of the brake shoe body (3-1) along the normal direction to the friction body of the brake shoe body (3-1).

5. The brake shoe pressure detection device according to claim 2, characterized in that: At least two wiring structures connected to the two embedded structures are provided on the side surface of the brake shoe body (3-1) and are used to lead out the wires (3-3) of the two force sensors (3-2) one by one.

6. The brake shoe pressure detection device according to claim 5, characterized in that: The wiring structure includes a wiring hole (3-5).

7. The brake shoe pressure detection device according to any one of claims 1 to 6, characterized in that: The number of the force sensors (3-2) is greater than two and they are divided into two groups. The two groups of force sensors (3-2) are respectively embedded in the back of the brake shoe body (3-1) along the normal direction and are symmetrically distributed on both sides of the shoe nose of the brake shoe body (3-1). The contacts of the two groups of force sensors (3-2) protrude out of the back of the brake shoe body (3-1) and are used to abut and cooperate with the brake shoe support.

8. The brake shoe pressure detection device according to claim 7, characterized in that: Each group of the force sensors (3-2) has at least two force sensors (3-2), which are evenly distributed on the side where the shoe nose is located.

9. A braking device, applied to a railway vehicle, comprising a brake shoe pressure detection device, characterized in that: The brake shoe pressure detection device is the brake shoe pressure detection device as described in any one of claims 1-8.

10. A railway vehicle comprising a braking device, characterized in that: The braking device is the braking device according to claim 9.

Images