Wedge main friction plate

Abstract

The utility model relates to a wedge main friction plate which comprises a positioning cylinder, a reinforcing layer and a wear-resisting layer, the positioning cylinder is fixedly connected with the reinforcing layer, the positioning cylinder is located on the first surface of the reinforcing layer, the wear-resisting layer is formed on the second surface of the reinforcing layer, and the wear-resisting layer is located on the second surface of the reinforcing layer. A through positioning pin hole is formed in the positioning cylinder, a transversely-extending chip groove is formed in the wear-resisting layer, and the lower end face of the chip groove inclines downwards from outside to inside to form a containing groove used for containing chips, so that the chips generated by friction or sand grains entering from the outside slide into the containing groove along the inclined face. Therefore, the chip removal effect of the wedge main friction plate is improved, the friction coefficient of the wear-resistant layer is prevented from being repeatedly influenced by chips and sand grains which are not restrained, and the stability of the friction coefficient is improved.

Description

Technical Field

[0001] The utility model relates to an inclined wedge main friction plate, in particular to an improved inclined wedge main friction plate with good chip removal effect. Background Art

[0002] The main friction plate is a critical component of a freight car bogie. For example, the main friction surface of the K6 bogie's main friction plate is the main friction surface of the wedge damper. The friction generated by the plate is the primary source of the train's damping force. Changes in the friction coefficient affect vehicle dynamics and are crucial to the development of heavy-duty, high-speed railway freight car technology. For example, Chinese Utility Model Patent CN210116508U discloses a railway freight car bogie equipped with a main friction plate.

[0003] Existing angular wedge main friction plates are all made of polymer composite materials. Maintaining a reasonable and standardized number of friction threads for optimal wear resistance is a key factor influencing their performance. For example, the multi-layered angular wedge friction plate with chip grooves, described in Chinese Utility Model Patent Publication No. CN2913725Y, features a chip groove in the middle of the friction layer to maintain a stable friction coefficient. However, in practice, the chip removal effect of these grooves remains unsatisfactory.

[0004] Furthermore, polymer composite oblique main friction plates often experience umbilical cord damage, seriously impacting product safety and reliability. To address this issue, we previously proposed a wedge-shaped main friction plate (CN203974830U) to address this issue. However, this patented technology still exhibits umbilical cord damage in practical applications, requiring further improvement. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a main friction plate with an inclined wedge, which is used to solve the problem of poor chip removal effect of the chip removal groove.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is:

[0007] A wedge main friction plate, the key technology of which is that it includes a positioning cylinder, a reinforcement layer and a wear-resistant layer, the positioning cylinder is fixedly connected to the reinforcement layer, the positioning cylinder is located on the first surface of the reinforcement layer, the wear-resistant layer is formed on the second surface of the reinforcement layer, the positioning cylinder is provided with a through positioning pin hole, the wear-resistant layer is formed with a transversely extending chip groove, and the lower end surface of the chip groove is inclined downward from the outside to the inside to form a receiving groove for accommodating debris.

[0008] As an implementation manner of the present invention, the chip removal groove is in an arc shape or a herringbone shape.

[0009] As an embodiment of the present invention, the inclined wedge main friction plate includes a friction plate body, the height of the friction plate body is H, and the width W of the chip removal groove is 5%-6% of H.

[0010] As an embodiment of the present invention, a socket is opened in the middle of the reinforcement layer, and a plurality of support petals are evenly distributed around the socket. The support petals are integrally connected to the reinforcement layer, and the extension direction of the support petals is toward the first surface of the reinforcement layer. The positioning cylinder includes a cylindrical body and a sleeve. The cylindrical body is inserted into the socket, and the sleeve is placed outside the cylindrical body and the support petals. The support petals, the cylindrical body and the sleeve are formed into the positioning cylinder by hot pressing fusion.

[0011] As an embodiment of the present invention, the support petal is a triangular structure in which the reinforcement layer is punched out by the insertion hole.

[0012] As an embodiment of the present invention, an integrally formed flange portion is provided on the upper portion of the cylindrical body.

[0013] As an implementation mode of the present invention, a trapezoidal boss is integrally formed on the upper portion of the reinforcement layer.

[0014] The beneficial effects of adopting the above technical solution are:

[0015] The inclined wedge main friction plate provided by the utility model has a receiving groove provided in the chip removal groove, so that the debris generated by friction or the sand entering from the outside slides into the receiving groove along the inclined surface, thereby staying away from the friction surface of the wear-resistant layer, improving the chip removal effect of the inclined wedge main friction plate, avoiding the debris and sand from repeatedly affecting the friction coefficient of the wear-resistant layer without restraint, and improving the stability of the friction coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the wear-resistant layer structure of Example 1 of the present utility model.

[0018] Figure 3 It is a side structural schematic diagram of the utility model.

[0019] Figure 4 yes Figure 3 Schematic diagram of the partially enlarged structure of part A in the middle.

[0020] Figure 5 It is a schematic diagram of the connection structure between the positioning cylinder and the reinforcement layer of the utility model.

[0021] Figure 6It is a schematic cross-sectional structural diagram of the connection relationship between the positioning cylinder and the reinforcement layer of the utility model.

[0022] Figure 7 It is a schematic diagram of the wear-resistant layer structure of Example 2 of the present utility model.

[0023] Figure 8 It is a structural schematic diagram of a reinforcement layer in which convex ridges are provided on the second surface.

[0024] Among them: 1 positioning cylinder, 1-1 positioning pin hole, 1-2 cylindrical body, 1-3 sleeve, 1-4 flange part, 2 reinforcement layer, 2-1 boss, 2-2 support petal, 2-3 insertion hole, 2-4 first surface, 2-5 second surface, 2-6 ridge, 3 wear-resistant layer, 4 chip removal groove, 4-1 accommodating groove, 4-2 lower end face. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described clearly and completely below in conjunction with specific embodiments.

[0026] like Figure 1 and Figure 2 The shown embodiment shows a wedge main friction plate, which includes a positioning cylinder 1, a reinforcement layer 2 and a wear-resistant layer 3, wherein the positioning cylinder 1 is fixedly connected to the reinforcement layer 2, the positioning cylinder 1 is located on the first surface 2-4 of the reinforcement layer 2, and the wear-resistant layer 3 is formed on the second surface 2-5 of the reinforcement layer 2, the positioning cylinder 1 is provided with a through positioning pin hole 1-1, and the wear-resistant layer 3 is formed with a transversely extending chip groove 4, the lower end surface 4-2 of the chip groove 4 is inclined downward from the outside to the inside to form a receiving groove 4-1 for accommodating debris, so that the debris generated by friction or the sand entering from the outside slides into the receiving groove 4-1 along the inclined surface, thereby staying away from the friction surface of the wear-resistant layer 3, thereby improving the chip removal effect of the wedge main friction plate, avoiding the debris and sand from repeatedly affecting the friction coefficient of the wear-resistant layer 3 without restraint, and improving the stability of the friction coefficient.

[0027] As a preference, Figure 2 and Figure 7 As shown in FIG, the chip removal groove 4 is in an arc shape or a herringbone shape. Figure 2 When the chip groove 4 is arc-shaped, the middle is high and the two ends are low, so that the debris and sand entering the chip groove 4 will move along the chip groove 4 to the two ends, which is conducive to the discharge of debris and sand. Figure 7 When the chip groove 4 is in the shape of a human figure, the entire chip groove 4 is high in the middle and low at both ends. The two outer edges of the chip groove 4 are both provided with arc chamfers to avoid sharp edges and corners that are easily damaged and produce debris.

[0028] like Figure 3As shown, the beveled wedge main friction plate includes a friction plate body with a height of H. The width W of the chip groove 4 is 5%-6% of H. In one specific embodiment, the height H of the friction plate body is 144 mm, and the width W of the chip groove 4 is 8 mm. The dimensions of the beveled wedge main friction plate are determined by the main friction surface of the beveled wedge damper. This width of the chip groove 4 ensures that the friction effect of the wear-resistant layer 3 is maintained while allowing the chip groove 4 to smoothly collect debris and sand.

[0029] In this embodiment, the upper part of the friction plate body of the wedge main friction plate is also integrally formed with a boss portion. Figures 1 to 3 A trapezoidal boss 2 - 1 is integrally formed on the upper portion of the reinforcement layer 2 , and a wear-resistant layer 3 is also provided on the boss 2 - 1 .

[0030] As a preferred embodiment, Figure 8 As shown, a plurality of evenly distributed ridges 2 - 6 are provided on the second surface 2 - 5 of the reinforcement layer 2 to enhance the connection strength between the reinforcement layer 2 and the wear-resistant layer 3 .

[0031] like Figure 5 and Figure 6 As shown, a socket 2-3 is opened in the middle of the reinforcing layer 2, and a plurality of support petals 2-2 are evenly distributed around the socket 2-3. The support petals 2-2 are triangular structures punched out of the reinforcing layer 2 by the socket 2-3. The support petals 2-2 are integrally connected to the reinforcing layer 2, and the extension direction of the support petals 2-2 is toward the first surface 2-4 of the reinforcing layer 2.

[0032] The positioning cylinder 1 includes a cylindrical body 1-2 and a sleeve 1-3. The cylindrical body 1-2 is inserted into the insertion hole 2-3. The upper part of the cylindrical body 1-2 is provided with an integrally formed flange portion 1-4. The flange portion 1-4 is used to fill the space above the support petal 2-2. The sleeve 1-3 is sleeved outside the cylindrical body 1-2 and the support petal 2-2. The support petal 2-2, the cylindrical body 1-2 and the sleeve 1-3 are formed into the positioning cylinder 1 by hot pressing and fusion, so that the connection structure between the positioning cylinder 1 and the reinforcement layer 2 is more stable and reliable and not easy to be damaged.

[0033] The specific processing method is as follows: the polyimide resin is melted and impregnated with glass cloth to form impregnated glass cloth, a certain amount of impregnated glass cloth is weighed and overlapped to form a blank of the reinforcement layer 2, which is then punched in a hydraulic press stamping tooling die to form support petals 2-2 and sockets 2-3.

[0034] Weigh a certain amount of impregnated glass cloth, heat it on an 80-100°C electric heating plate, roll it into a cylindrical body 1-2 and a sleeve 1-3, and tie them with yarn. Insert the cylindrical body 1-2 into the insertion hole 2-3 and make the support petal 2-2 hold the cylindrical body 1-2 tightly. Then, put the sleeve 1-3 on the outside of the cylindrical body 1-2 and the support petal 2-2 to obtain a blank with preliminary connection between the positioning cylinder 1 and the reinforcement layer 2.

[0035] The mold is heat treated with high-temperature silicone oil, and the above-mentioned blank and wear-resistant layer 3 material (a blend of polyimide resin, friction-increasing and friction-reducing materials and reinforcing fibers) are placed in it for pre-pressing. After hot pressing and curing, it forms a whole. After keeping the temperature and pressure for a period of time, it is demolded.

[0036] Since the chip removal groove 4 is provided with the accommodating groove 4 - 1 , the mold strip can be pulled out from both sides after being ejected from the mold together with the product.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wedge main friction plate, characterized by: The invention comprises a positioning cylinder (1), a reinforcement layer (2) and a wear-resistant layer (3), wherein the positioning cylinder (1) is fixedly connected to the reinforcement layer (2), the positioning cylinder (1) is located on a first surface (2-4) of the reinforcement layer (2), the wear-resistant layer (3) is formed on a second surface (2-5) of the reinforcement layer (2), a through positioning pin hole (1-1) is provided on the positioning cylinder (1), and a transversely extending chip groove (4) is formed on the wear-resistant layer (3), and the lower end surface (4-2) of the chip groove (4) is inclined downward from the outside to the inside to form a receiving groove (4-1) for accommodating chips.

2. The wedge main friction plate according to claim 1, characterized in that: The chip removal groove (4) is in an arc shape or a herringbone shape.

3. The wedge main friction plate according to claim 1, characterized in that: The inclined wedge main friction plate comprises a friction plate body, the height of the friction plate body is H, and the width W of the chip removal groove (4) is 5%-6% of H.

4. The wedge main friction plate according to claim 1, characterized in that: A socket (2-3) is provided in the middle of the reinforcing layer (2), a plurality of support petals (2-2) are evenly distributed around the socket (2-3), the support petals (2-2) are integrally connected to the reinforcing layer (2), and the extension direction of the support petals (2-2) is toward the first surface (2-4) of the reinforcing layer (2), the positioning cylinder (1) comprises a cylindrical body (1-2) and a sleeve (1-3), the cylindrical body (1-2) is inserted into the socket (2-3), the sleeve (1-3) is sleeved outside the cylindrical body (1-2) and the support petals (2-2), and the support petals (2-2), the cylindrical body (1-2) and the sleeve (1-3) are formed into the positioning cylinder (1) by hot pressing and fusion.

5. The wedge main friction plate according to claim 4, characterized in that: The support flap (2-2) is a triangular structure formed by punching the reinforcement layer (2) through the insertion hole (2-3).

6. The wedge main friction plate according to claim 4, characterized in that: An integrally formed flange portion (1-4) is provided on the upper portion of the cylindrical body (1-2).

7. The wedge main friction plate according to claim 1, characterized in that: A trapezoidal boss (2-1) is integrally formed on the upper portion of the reinforcement layer (2).

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