Testing device for abrasion performance of rubber track shoe

Abstract

The invention relates to the technical field of abrasion experiments, and discloses a rubber track shoe abrasion performance testing device which comprises a disc type base, a passive rotation type abrasion plate, a track shoe fixing structure and a reciprocating horizontal displacement unit, one end of the passive rotation type abrasion plate is rotationally connected to the surface of the disc type base through a rotation structure, and the other end of the passive rotation type abrasion plate is rotationally connected to the surface of the disc type base through a rotation structure. The reciprocating horizontal displacement unit drives the track shoe fixing structure to slide in the vertical direction of the passive rotary abrasion plate in the static state, and the passive rotary abrasion plate synchronously rotates along with movement of the track shoe fixing structure. According to the technical scheme, through linear sliding of the track shoe fixing structure, the rubber track shoe is subjected to composite sliding of linear sliding and rotary sliding of the passive rotary abrasion plate under the influence of friction force of the passive rotary abrasion plate. The mode not only can reduce the use of driving parts, but also enables the simulation process of the rubber track shoe to better accord with the use process.

Description

Technical Field

[0001] The invention relates to the technical field of wear testing, in particular to a testing device for the wear performance of a rubber track shoe. Background Art

[0002] Rubber tracks require wear testing to determine if they meet operational requirements. Currently, wear testing primarily involves sliding friction. Unidirectional sliding testing utilizes a single drive unit to complete testing requirements, simplifying equipment application. However, during unidirectional sliding, the friction surface and the rubber track shoe follow a single, overlapping reciprocating trajectory, resulting in a microscopic appearance of linear grooves on the surface of the rubber track shoe.

[0003] During vehicle steering, the track utilizes the speed difference between the two tracks to achieve a turn. The friction on the rubber track shoe is not only linear friction, but also rotational friction. Rotational friction requires rotational power for the rubber track shoe or friction surface, which increases the amount of equipment required.

[0004] During the friction test, the rubber track shoe needs to increase the downforce to increase the friction and fit. If the pressure is applied to the drive shaft of the rotating power part, it is easy to reduce the life of the power part or cause damage. Summary of the Invention

[0005] The purpose of the present invention is to provide a testing device for the wear performance of a rubber track shoe, which adopts the linear sliding of the track shoe fixing structure. Under the influence of the friction force of the track shoe fixing structure, the passive rotary wear plate is subjected to the combined sliding of the linear sliding and the rotary sliding of the passive rotary wear plate, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A test device for the wear performance of a rubber track shoe comprises a disc base, a passive rotating wear plate, a track shoe fixing structure, and a reciprocating horizontal displacement unit. One end of the passive rotating wear plate is rotatably connected to the surface of the disc base via a rotating structure, and the rotating structure is close to the edge of the disc base. The track shoe fixing structure is located above the passive rotary wear plate, the reciprocating horizontal displacement unit drives the track shoe fixing structure to slide in the vertical direction when the passive rotary wear plate is static, and the passive rotary wear plate rotates synchronously with the movement of the track shoe fixing structure. The surface of the passive rotary wear plate is sequentially provided with a first friction surface, a second friction surface, and a third friction surface with the rotating structure as a starting point. When the passive rotary wear plate is static, the contact areas of the first friction surface, the second friction surface, and the third friction surface with the track shoe fixing structure are respectively a first covering area, a second covering area, and a third covering area.

[0007] As a further solution of the present invention: the track shoe fixing structure has a width shorter than the rotating plate length of the passive rotary wear plate, and the area of ​​the first covering area is greater than the area of ​​the second covering area and greater than the area of ​​the third covering area.

[0008] As a further solution of the present invention: a pressure component is provided on the bottom surface of the track shoe fixing structure, and the pressure component drives the track shoe under the track shoe fixing structure to always contact the first covering area, the second covering area, and the third covering area and provide contact pressure.

[0009] As a further solution of the present invention: when the passive rotary wear plate is in a rotating state, the area of ​​the third covering region increases and the area of ​​the third covering region is always smaller than the area of ​​the third friction surface.

[0010] As a further solution of the present invention: a keyway is provided in the middle of the passive rotary wear plate, a sliding connection portion is provided below the track shoe fixing structure, and the sliding connection portion is slidably connected to the inside of the keyway.

[0011] As a further solution of the present invention: the sliding connection part includes a threaded part, a pressing part, and a sliding part. A countersunk hole is opened in the middle of the track shoe. The threaded part is fixedly connected to the track shoe fixing structure. The pressing part is located in the countersunk hole to fix the track shoe, and the sliding part is located in the keyway to slide.

[0012] As a further solution of the present invention: the middle portion of the track shoe fixing structure has a central area, and the center of the central area is concentric with the center of the sliding connection portion.

[0013] Compared with the prior art, the present invention has the following beneficial effects: Advantage I: This technical solution utilizes the linear sliding of the track shoe fixing structure. The passive rotary wear plate, under the influence of friction from the track shoe fixing structure, experiences a combination of linear and rotary sliding of the rubber track shoe. This approach not only reduces the use of drive components but also makes the simulation process of the rubber track shoe more consistent with actual use.

[0014] Advantage II: By utilizing the displacement characteristics of the rubber track shoe in Advantage I, the first coverage area, the second coverage area, and the third coverage area are set, so that the rubber track shoe can achieve mixed friction and comparison of the combined friction surface, reducing the error between the experimental results and the real environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 Schematic diagram of a top view of a test device for the wear performance of a rubber track shoe; Figure 2 A schematic diagram comparing the overlay and disassembly of the motion trajectory of the third friction surface in a test device for the wear performance of a rubber track shoe; Figure 3 A schematic diagram comparing the overlay and disassembly of the motion trajectory of the first friction surface in a test device for the wear performance of a rubber track shoe; Figure 4 A schematic diagram comparing the overlay and disassembly of the motion trajectory of the second friction surface in a test device for the wear performance of a rubber track shoe; Figure 5 A schematic diagram of a test device for the wear performance of rubber track shoes after adding a keyway; In the figure: 1. Disc base; 2. Passive rotary wear plate; 21. Rotating structure; 22. Keyway; 100. First friction surface; 101. First covering area; 200. Second friction surface; 201. Second covering area; 300. Third friction surface; 301. Third covering area; 400. Center area; 500. Plate width and length; 600. Rotating plate length; 3. Track shoe fixing structure; 31. Sliding connection part; 4. Reciprocating horizontal displacement unit. DETAILED DESCRIPTION

[0017] See also Figure 1-Figure 5 , Example 1: In order to simulate the combined linear sliding and rotational sliding behavior of the rubber track shoe during use, this embodiment uses a single drive element for drive simulation and makes the following improvements: This embodiment includes a disc base 1, a passive rotary wear plate 2, a track plate fixing structure 3, and a reciprocating horizontal displacement unit 4. One end of the passive rotary wear plate 2 is rotatably connected to the surface of the disc base 1 via a rotating structure 21, which is close to the edge of the disc base 1. The track plate fixing structure 3 is located above the passive rotary wear plate 2. The reciprocating horizontal displacement unit 4 drives the track plate fixing structure 3 to slide in the vertical direction of the passive rotary wear plate 2 when it is static. The passive rotary wear plate 2 rotates synchronously with the movement of the track plate fixing structure 3. The reciprocating horizontal displacement unit 4 is conventional and can be implemented using a reciprocating push structure.

[0018] Improvement Principle: This technical solution utilizes the linear sliding of the track shoe fixing structure 3 to cause the passive rotary wear plate 2 to rotate under the influence of the friction of the track shoe fixing structure 3. As the angle between the passive rotary wear plate 2 and the track shoe fixing structure 3 and the rotating structure 21 on the passive rotary wear plate 2 changes, the rubber track shoe secured by the track shoe fixing structure 3 experiences a combination of linear and rotary sliding of the passive rotary wear plate 2. This approach not only reduces the use of drive components but also makes the simulation of the rubber track shoe more consistent with actual use.

[0019] Furthermore, a pressure assembly is provided on the bottom surface of the track shoe fixing structure 3. This assembly drives the track shoe below the track shoe fixing structure 3 to maintain contact with the first covering area 101, the second covering area 201, and the third covering area 301. Before use, the rubber track shoe is fixed to the movable plate below the track shoe fixing structure 3. The movable plate can apply downward pressure to the movable plate through pressure members such as screws and springs. This pressure ensures that the rubber track shoe is in constant contact with the passive rotating wear plate 2. Example

[0020] Based on the first embodiment, in order to further simulate the mixed friction state of the rubber track shoe under different terrains during operation, the present embodiment adds the following contents based on the compound rotation of the first embodiment: Improvement content: The surface of the passive rotary wear plate 2 is sequentially provided with a first friction surface 100, a second friction surface 200, and a third friction surface 300 with the rotating structure 21 as the starting point. When the passive rotary wear plate 2 is static, the contact areas of the first friction surface 100, the second friction surface 200, and the third friction surface 300 with the track shoe fixed structure 3 are respectively the first covering area 101, the second covering area 201, and the third covering area 301. The plate width length 500 of the track shoe fixed structure 3 is less than the rotating plate length 600 of the passive rotary wear plate 2. The area of ​​the first covering area 101 is greater than the area of ​​the second covering area 201, and the area of ​​the third covering area 301.

[0021] Principle of improvement: During the linear sliding of the track plate fixing structure 3, the angle of the passive rotary wear plate 2 changes as the track plate fixing structure 3 moves. As the horizontal angle of the passive rotary wear plate 2 increases, the end of the passive rotary wear plate 2 away from the rotating structure 21 gradually contacts the rubber track plate. Therefore, the plate width length 500 of the track plate fixing structure 3 is less than the rotating plate length 600 of the passive rotary wear plate 2, and the contact surface between the rubber track plate and the passive rotary wear plate 2 can change. Furthermore, the area of ​​the first covering area 101 is greater than the area of ​​the second covering area 201, which is greater than the area of ​​the third covering area 301. This is adapted to the characteristics that the area of ​​the first covering area 101 decreases as the track plate fixing structure 3 moves, and the area of ​​the third covering area 301 increases as the track plate fixing structure 3 moves, thereby forming a composite wear experiment. The specific effects are as follows: Effect: See Figure 2-Figure 4 , Figure 2 The colors in the figure represent the contact areas between the third covering area 301 and the rubber track shoe at different positions and the overlapping areas of multiple contact areas. Figure 2 It can be seen that the coverage area of ​​the third coverage area 301 and the rubber track shoe is located on the right half of the midpoint of the rubber track shoe.

[0022] Figure 3 The colors in the figure represent the contact areas between the first covering area 101 and the rubber track shoe at different positions and the overlapping areas of multiple contact areas. Figure 3 It can be seen that the first coverage area 101 and the coverage area of ​​the rubber track shoe are located on the left half of the midpoint of the rubber track shoe.

[0023] Figure 4 The colors in the figure represent the contact areas between the second covering area 201 and the rubber track shoe at different positions and the overlapping areas of multiple contact areas. Figure 4 It can be seen that the coverage area of ​​the second covering area 201 and the rubber track shoe is located at the center of the rubber track shoe.

[0024] A center area 400 is added, and the center of the center area 400 coincides with the geometric center of the rubber track shoe. The left side of the center area 400 forms a composite friction effect of the first covering area 101 and the second covering area 201, and the right side of the center area 400 forms a composite friction effect of the second covering area 201 and the third covering area 301.

[0025] If the friction surface of the third friction surface 300 is consistent with the friction surface of the first friction surface 100 , the left and right sides of the central area 400 form a mutual contrast or increase the friction reference area.

[0026] If the third friction surface 300 is inconsistent with the first friction surface 100, the left and right sides of the central area 400 form a control group. By controlling the variables, the same motion variable is used to obtain the wear results of the rubber track shoe under different friction surface combinations.

[0027] Supplementary explanation: When the passive rotary wear plate 2 is in a rotating state, the area of ​​the third covering region 301 increases and the area of ​​the third covering region 301 is always smaller than the area of ​​the third friction surface 300 .

[0028] If the area of ​​the third covering region 301 is equal to the area of ​​the third friction surface 300, the rubber track shoe continues to move, causing the rubber track shoe to gradually separate from the passive rotating wear plate 2. After the rubber track shoe separates from the passive rotating wear plate 2, the rubber track shoe cannot slide above the passive rotating wear plate 2 due to friction and move in coordination with the passive rotating wear plate 2, thus failing to complete the wear test. Example

[0029] Based on the second embodiment, this embodiment makes the following improvements to avoid the separation of the track shoe fixing structure 3 and the passive rotary wear plate 2, as well as the excessive displacement of the passive rotary wear plate 2 and the track shoe fixing structure 3: The improvement content is as follows: a key groove 22 is opened in the middle of the passive rotary wear plate 2, and a sliding connection part 31 is provided below the track shoe fixing structure 3, and the sliding connection part 31 is slidably connected to the inside of the key groove 22.

[0030] The sliding connection portion 31 can slide in the key groove 22. As the angle of the passive rotary wear plate 2 moves, the track shoe fixing structure 3 will also slide along the long side of the passive rotary wear plate 2. The limiting effect of the key groove 22 and the sliding connection portion 31 ensures that the passive rotary wear plate 2 and the track shoe fixing structure 3 are always in a connected state.

[0031] In order to further simplify the fixing method of the rubber track shoe, the following improvements are made: The sliding connection part 31 includes a threaded part, a pressing part, and a sliding part. A countersunk hole is opened in the middle of the track shoe. The threaded part is fixedly connected to the track shoe fixing structure 3. The pressing part is located in the countersunk hole to fix the track shoe, and the sliding part is located in the keyway 22 to slide.

[0032] The sliding connection portion 31 slides with the key groove 22 through the sliding portion, and the threaded portion is connected to the track shoe fixing structure 3, or the threaded portion is connected to the pressure movable plate of the track shoe fixing structure 3. The press-fit portion enters the countersunk hole and is fixed to the plate surface, thereby preventing the rubber track shoe from being separated from the track shoe fixing structure 3 or the pressure movable half of the track shoe fixing structure 3.

[0033] The track shoe fixing structure 3 has a central area 400 in the middle, and the center of the central area 400 is concentric with the center of the sliding connection portion 31 .

[0034] After the track shoe fixing structure 3 is concentric with the center area 400, it can ensure that the passive rotary wear plate 2 always slides and rotates with the sliding connection part 31 as the center, thereby enhancing the friction coverage area of ​​the center area 400 and avoiding the problem of ineffective friction caused by the passive rotary wear plate 2 deviating from the center area 400.

[0035] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A testing device for the wear performance of a rubber track shoe, comprising a disc base (1), a passive rotating wear plate (2), a track shoe fixing structure (3), and a reciprocating horizontal displacement unit (4), characterized in that: One end of the passive rotary wear plate (2) is rotatably connected to the surface of the disc base (1) via a rotating structure (21), and the rotating structure (21) is close to the edge of the disc base (1); The track plate fixing structure (3) is located above the passive rotary wear plate (2); the reciprocating horizontal displacement unit (4) drives the track plate fixing structure (3) to slide in the vertical direction of the passive rotary wear plate (2) in a static state; the passive rotary wear plate (2) rotates synchronously with the movement of the track plate fixing structure (3); a first friction surface (100), a second friction surface (200), and a third friction surface (300) are sequentially provided on the surface of the passive rotary wear plate (2) with the rotating structure (21) as a starting point; when the passive rotary wear plate (2) is in a static state, the contact areas of the first friction surface (100), the second friction surface (200), and the third friction surface (300) with the track plate fixing structure (3) are a first covering area (101), a second covering area (201), and a third covering area (301), respectively.

2. The device for testing the wear performance of a rubber track shoe according to claim 1, characterized in that: The track shoe fixing structure (3) has a plate width (500) that is smaller than the rotating plate length (600) of the passive rotary wear plate (2), and the area of ​​the first covering area (101) is greater than the area of ​​the second covering area (201) and is greater than the area of ​​the third covering area (301).

3. The testing device for the wear performance of a rubber track shoe according to claim 1, characterized in that: A pressure assembly is provided on the bottom surface of the track shoe fixing structure (3), and the pressure assembly drives the track shoe below the track shoe fixing structure (3) to always contact the first covering area (101), the second covering area (201), and the third covering area (301) and provide contact pressure.

4. The device for testing the wear performance of a rubber track shoe according to claim 1, characterized in that: When the passive rotary wear plate (2) is in a rotating state, the area of ​​the third covering region (301) increases, and the area of ​​the third covering region (301) is always smaller than the area of ​​the third friction surface (300).

5. The testing device for the wear performance of a rubber track shoe according to claim 1, characterized in that: A keyway (22) is provided in the middle of the passive rotary wear plate (2), and a sliding connection portion (31) is provided below the track shoe fixing structure (3), wherein the sliding connection portion (31) is slidably connected to the inside of the keyway (22).

6. The device for testing the wear performance of a rubber track shoe according to claim 5, characterized in that: The sliding connection portion (31) comprises a threaded portion, a pressing portion, and a sliding portion. A countersunk hole is provided in the middle of the track shoe. The threaded portion is fixedly connected to the track shoe fixing structure (3). The pressing portion is located in the countersunk hole to fix the track shoe. The sliding portion is located in the keyway (22) to slide.

7. The device for testing the wear performance of a rubber track shoe according to claim 5, characterized in that: The middle of the track shoe fixing structure (3) has a central area (400), and the center of the central area (400) is concentric with the center of the sliding connection portion (31).

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