A heart disc and a wear disc for a bogie bolster and a mounting structure thereof

Abstract

The utility model discloses a bogie bolster is used heart disc wear plate and its mounting structure relates to wear plate field, and its technical scheme main points are: including wear plate body, the wear plate body is annular structure, and its inboard wall is equipped with the friction surface for with the contact of upper heart disc, and its outboard wall is equipped with the multiple positioning recess groove A of the circular array arrangement, the wear plate body bottom is equipped with the multiple positioning recess groove B of the circular array arrangement, and the inner top wall of positioning recess groove B all is equipped with the through -hole A of wear plate body, effect is two layers of positioning structure of radial and axial, solves the problem that traditional single positioning is easy to deviate, through magnet pre -fix mechanism makes when installing no manual support, can effectively reduce the installation difficulty, and through magnetic force adsorption and mechanical locking double protection, solve the hidden danger that traditional single bolt connection is easy to loosen.

Description

Technical Field

[0001] This utility model relates to the field of wear discs, and more specifically, it relates to a wear disc for a bogie bolster and its mounting structure. Background Technology

[0002] The center plate wear plate is a key component in railway vehicle bogies that enables flexible connection between the car body and the bolster. Its main function is to isolate the upper center plate from the lower center plate of the bolster and absorb the wear caused by their relative rotation through its own frictional loss, thereby extending the service life of the center plate assembly.

[0003] Existing wear plates mostly employ a single radial or axial positioning structure, which has limited positioning effectiveness. Under the vibration and impact generated by vehicle operation, relative displacement easily occurs, leading to uneven wear or even structural loosening. Furthermore, the fixing method largely relies on bolt connections, lacking a pre-fixing mechanism. This not only increases installation difficulty (during installation, the lack of temporary constraints between the wear plate and the mounting part allows for slight displacement due to slight contact or vibration; workers must use one hand to continuously hold the wear plate to maintain alignment while using the other to fix it, further increasing installation difficulty), but also easily leads to loosening (affected by vibration gaps, the dynamic load caused by these gaps can disrupt the stability of the bolt's preload. After tightening, the preload originally formed by the friction of the threaded pair will fluctuate periodically due to the reciprocating movement of the wear plate: when the wear plate shifts to one side, the bolt is subjected to additional tension; when returning to its original position, the tension disappears. This alternating stress causes "fatigue relaxation" in the bolt, gradually weakening the preload until it can no longer maintain a tight state).

[0004] Therefore, in order to solve the above-mentioned technical problems, this application proposes a bogie bolster center plate wear plate and its mounting structure. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a bogie bolster center plate wear plate and its installation structure.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bogie bolster center plate wear plate, comprising a wear plate body, the wear plate body having an annular structure, its inner side wall having a friction surface for contacting the upper center plate, its outer side wall having a plurality of positioning grooves A arranged in a circumferential array, the bottom of the wear plate body having a plurality of positioning grooves B arranged in a circumferential array, and the inner top wall of each positioning groove B having a through hole A penetrating the wear plate body.

[0007] Preferably, the friction surface is made of a wear-resistant material, which is modified polytetrafluoroethylene.

[0008] Preferably, a magnet A is fixedly connected to the inner top wall of the positioning groove B, and a through hole B is provided at the alignment position of the magnet A and the through hole A, and the diameter of the through hole B is equal to the diameter of the through hole A.

[0009] A mounting structure for a bogie bolster center plate wear plate is provided for mounting the aforementioned wear plate. The structure includes a mounting part for the lower center plate of the bolster. The vertical surface of the mounting part is integrally formed with multiple protrusions that are adapted to the positioning groove A. The horizontal surface of the mounting part is fixedly connected with multiple fixing blocks that are adapted to the positioning groove B.

[0010] Preferably, the top of each fixing block is fixedly connected to a magnet B that is opposite to the pole of magnet A.

[0011] Preferably, the top end of the magnet B is fixedly connected to a screw that can pass through the through hole A. The screw passes through the through hole B and the through hole A in sequence, and the end of the screw extending out of the through hole A is threadedly connected to an anti-loosening nut.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model adopts a radial and axial two-layer positioning structure to solve the problem of easy displacement of traditional single positioning. The magnetic pre-fixing mechanism eliminates the need for manual support during installation, which can effectively reduce the installation difficulty. Furthermore, the dual protection of magnetic adsorption and mechanical locking solves the hidden danger of easy loosening of traditional single bolt connection.

[0013] 2. The friction surface of this utility model is made of wear-resistant modified polytetrafluoroethylene material, which not only has excellent wear resistance and self-lubricating properties, effectively reducing the frictional resistance when the upper disc rotates relative to the upper disc, but also has good weather resistance and anti-aging properties, which can adapt to the complex environment in vehicle operation and greatly extend the service life of the wear disc. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the specific structure of the top of the wear disc body in this utility model; Figure 2 This is a schematic diagram of the specific structure of the bottom of the wear disc body in this utility model; Figure 3 This is a schematic diagram of the specific structure of the mounting part in this utility model; Figure 4 This is a schematic diagram showing the specific structure of the connection between the wear disc body and the mounting part in this utility model.

[0015] In the figure: 1. Wearing disc body; 101. Positioning groove A; 102. Positioning groove B; 103. Through hole A; 2. Magnet A; 201. Through hole B; 3. Mounting part; 301. Protrusion; 302. Fixing block; 4. Magnet B; 5. Screw. Detailed Implementation

[0016] like Figure 1-4 As shown, this utility model provides a bogie bolster center plate wear plate and its mounting structure, which will be described in detail below: Regarding the wear disc body 1: The wear disc body 1 has an overall ring structure (outer diameter 300mm, inner diameter 200mm, thickness 20mm). Its inner sidewall is the friction surface that contacts the upper center disc. The surface is precision ground and the friction surface is made of wear-resistant modified polytetrafluoroethylene material. It not only has excellent wear resistance (wear rate is much lower than traditional metals or ordinary plastics) and self-lubricating properties (friction coefficient as low as 0.03-0.05), which can effectively reduce the frictional resistance when the upper center disc rotates relative to it, but also has good weather resistance and anti-aging properties. It can adapt to the complex environment in vehicle operation (such as temperature changes, vibration and shock), and greatly extend the service life of the wear disc.

[0017] Four positioning grooves A101 are symmetrically distributed along the circumferential direction on the outer side wall of the wear disc body 1. This structure forms a radial positioning with the protrusion 301 of the mounting part 3, and the fitting clearance is controlled at 0.1-0.15mm to ensure no circumferential movement.

[0018] The bottom of the wear disc body 1 has four positioning grooves B102 arranged in a circular array, which correspond one-to-one with the positioning grooves A101 in the vertical direction (the centers of the circles are collinear). The positioning grooves B102 are cuboid structures (30mm long, 20mm wide, and 10mm deep), and the inner top wall has a through hole A103 (one or two) with a diameter of 8mm. The inner wall of the through hole A103 is inlaid with a brass wear-resistant sleeve (1mm thick) to prevent the screw 5 from scratching the hole wall when it is inserted.

[0019] The inner top wall of the positioning groove B102 is fixed with a magnet A2 by anaerobic adhesive. The magnet A2 has a through hole B201 with a diameter of 8mm, which is coaxial with the through hole A103 to ensure that the screw 5 can be smoothly inserted.

[0020] Regarding the installation structure: The installation part 3 is an integrated cast steel part of the lower center plate of the bolster. Its vertical surface is integrally formed with 4 protrusions 301 that are adapted to the positioning groove A101. The top of the protrusions is chamfered at 30° to guide the installation.

[0021] Four cuboid fixing blocks 302 are welded to the horizontal surface of the mounting part 3, with a fitting gap of ≤0.1mm between them and the positioning groove B102, achieving precise axial positioning. A magnet B4 is fixed to the top of the fixing block 302 with anaerobic adhesive. Magnet B4 and magnet A2 are opposite poles (N pole to S pole), and the attraction force of a single magnet is ≥80N, ensuring stability during pre-fixation.

[0022] Magnet B4 has a screw 5 welded to its top. The protruding end of screw 5 is threaded with a lock nut (using Spirax thread structure), and a matching spring washer can provide continuous preload.

[0023] Pre-positioning stage: Align the positioning groove A101 of the wear disc body 1 with the protrusion 301 of the mounting part 3, and slowly push it in horizontally. When the distance between the wear disc body 1 and the mounting part 3 is reduced to 10mm, magnet A2 and magnet B4 generate an attraction force, guiding the positioning groove B102 to accurately fit with the fixing block 302. At this time, the wear disc body 1 can remain stable without external support.

[0024] Fixing Stage: After the pre-positioning stage described above is completed, screw 5 passes through through holes B201 and A103 in sequence. Then, a spring washer is fitted onto the protruding end of screw 5, and the anti-loosening nut is screwed in and tightened to the specified torque to complete the mechanical locking. At this time, the continuous attraction force of the magnet and the pre-tightening force of the bolt form a double fixation, eliminating vibration gaps and preventing the connection from loosening.

[0025] During vehicle operation, the upper center plate rotates relative to the lower center plate of the bolster around the vertical axis, transmitting load through contact with the inner friction surface of the wear plate body 1. The radial engagement between the positioning groove A101 and the protrusion 301 restricts the circumferential displacement of the wear plate body 1, while the axial engagement between the positioning groove B102 and the fixing block 302 restricts axial movement, ensuring uniform force distribution on the friction surface. The attraction force of magnets A2 and B4 counteracts the separation tendency caused by vibration, and the anti-loosening nut prevents loosening after long-term use through mechanical locking.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A bogie bolster wear plate, comprising a wear plate body (1), characterized in that: The wear plate body (1) has an annular structure. Its inner sidewall is provided with a friction surface for contacting the upper center plate. Its outer sidewall is provided with a plurality of positioning grooves A (101) arranged in a circumferential array. The bottom of the wear plate body (1) is provided with a plurality of positioning grooves B (102) arranged in a circumferential array. The inner top wall of each positioning groove B (102) is provided with a through hole A (103) that penetrates the wear plate body (1).

2. The bogie bolster wear disc according to claim 1, characterized in that: The friction surface is made of a wear-resistant material, which is modified polytetrafluoroethylene.

3. The bogie bolster wear disc according to claim 1, characterized in that: A magnet A (2) is fixedly connected to the inner top wall of the positioning groove B (102). A through hole B (201) is provided at the alignment position of the magnet A (2) and the through hole A (103), and the diameter of the through hole B (201) is equal to the diameter of the through hole A (103).

4. A mounting structure for a bogie bolster center plate wear plate, used for mounting the wear plate according to any one of claims 1-3, characterized in that: It includes a mounting part (3) for the lower center plate of the bolster, wherein the vertical surface of the mounting part (3) is integrally formed with a plurality of protrusions (301) that are adapted to the positioning groove A (101), and a plurality of fixing blocks (302) that are adapted to the positioning groove B (102) are fixedly connected to the horizontal surface of the mounting part (3).

5. The mounting structure of the bogie bolster center plate wear plate according to claim 4, characterized in that: The top of each of the fixed blocks (302) is fixedly connected to a magnet B (4) that is opposite to the pole of magnet A (2).

6. The mounting structure of the bogie bolster center plate wear plate according to claim 5, characterized in that: The top of the magnet B (4) is fixedly connected to a screw (5) that can pass through the through hole A (103). The screw (5) passes through the through hole B (201) and the through hole A (103) in sequence, and the end of the screw (5) extending out of the through hole A (103) is threaded with an anti-loosening nut.

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