Wedge friction damping device for railway wagon bogie, railway wagon bogie and railway wagon

Abstract

The wedge friction damping device comprises a wedge body, the wedge body is provided with a main friction surface, a plurality of mounting holes are formed in the main friction surface, lubricating bodies are mounted in the mounting holes, and the main friction surface is provided with a plurality of friction surfaces; the lubricating body protrudes out of the surface of the main friction face by 0-1 mm. According to the wedge friction damping device for the bogie of the railway wagon, the structure of an existing wedge friction damping device for the bogie is effectively simplified, noise and clamping stagnation of abrasion between metal are reduced, and the wedge friction damping device is convenient to overhaul and maintain, high in practicability and long in service life.

Description

Technical Field

[0001] The invention relates to the technical field of railway freight cars, and in particular to an inclined wedge friction vibration reduction device for a railway freight car bogie, a railway freight car bogie, and a railway freight car. Background Art

[0002] Railway freight cars generally use inclined wedge friction damping devices, which together with springs form spring damping devices. The spring mainly plays a buffering role, while the role of the inclined wedge damping device is to convert the mechanical energy of vehicle vibration into heat energy, which plays a role in preventing vibration.

[0003] The inclined wedge friction damping device has a simple structure, low cost, and is easy to manufacture and maintain. It is widely used on truck bogies. According to the characteristics of friction, it can be divided into two types of inclined wedge damping devices: variable friction and constant friction. Usually, there is metal-to-metal friction between the inclined wedge friction damping device and the side frame column wear plate, and there is also a structure in which a non-metallic wear plate is used between the inclined wedge vibration damping device and the side frame column wear plate. The existing metal-to-metal friction method has high noise, large friction damping, obvious viscosity characteristics, and is easy to get stuck; while the use of non-metallic friction plates makes the structure complicated, has a short life, and is not conducive to inspection and maintenance. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a wedge friction vibration reduction device for a railway freight car bogie, a railway freight car bogie, and a railway freight car. The device effectively simplifies the structure of the existing bogie wedge friction vibration reduction device and reduces the noise and sticking characteristics of the metal-to-metal friction.

[0005] To achieve the above-mentioned purpose, the present invention is a wedge friction damping device for a railway freight car bogie, comprising an inclined wedge body, wherein the inclined wedge body has a main friction surface, a plurality of mounting holes are formed on the main friction surface, a lubricating body is installed in the mounting hole, and the lubricating body protrudes from the surface of the main friction surface by 0-1 mm.

[0006] As a preferred embodiment, the inclined wedge is a constant friction inclined wedge or a variable friction inclined wedge.

[0007] As a preferred embodiment, the constant friction oblique wedge includes a main friction surface, and auxiliary friction surfaces are respectively arranged on both sides of the back side of the main friction surface, and a connecting frame is arranged between the two auxiliary friction surfaces; and a flange protruding outward is respectively arranged on the outer side of each auxiliary friction surface.

[0008] As a preferred embodiment, the connecting frame includes a frame top surface, frame side surfaces on both sides and a frame front; the frame front has an inclined frame slope and a frame vertical surface, the upper end of the frame slope is connected to the frame top surface, and the bottom end of the frame slope is integrally connected to the frame vertical surface; the two sides of the frame front are respectively connected to the frame side surfaces.

[0009] As a preferred embodiment, the variable friction inclined wedge body includes a main friction surface, and a inclined wedge frame is arranged on the back of the main friction surface. The inclined wedge frame includes an inclined wedge front face and inclined wedge side faces on both sides. The inclined wedge front face has an inclined wedge inclined surface and an inclined wedge vertical face. The inclined wedge inclined surface and the inclined wedge vertical face are integrally connected, and the two sides of the inclined wedge front face are respectively connected to the inclined wedge side faces.

[0010] As a preferred embodiment, the lubricating body protrudes from the surface of the main friction surface by 0.2-0.8 mm.

[0011] As a preferred embodiment, the shape of the lubricating body is a cylinder, a cuboid or a cube, and the shape of the mounting hole matches the shape of the lubricating body.

[0012] As a preferred embodiment, the lubricating body is installed in the mounting hole by using one of interference fit, metal pin fixation, metal key fixation, screw fixation, and sintering fixation.

[0013] The present invention also provides a railway freight car bogie, which comprises the above-mentioned inclined wedge friction vibration reduction device for the railway freight car bogie.

[0014] The present invention also provides a railway freight car, which comprises the railway freight car bogie mentioned above.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] Firstly, the wedge friction damping device for railway freight car bogie of the present invention has a plurality of mounting holes on the main friction surface, and lubricating bodies are installed in the mounting holes, thereby reducing the noise and sticking characteristics of metal-to-metal friction.

[0017] Secondly, the lubricating body of the inclined wedge friction vibration reduction device for the railway freight car bogie of the present invention wears away with the wear of the main friction surface, and powder is generated between the inclined wedge device and the wear plate of the bogie side frame column, thereby generating the required vibration reduction damping.

[0018] Thirdly, the structure of the inclined wedge friction damping device for the railway freight car bogie of the present invention is simple, which effectively simplifies the structure of the existing bogie inclined wedge damping device, and is easy to inspect and maintain, has strong practicality and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a wedge friction vibration reduction device for a railway freight car bogie according to a first embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of an inclined wedge according to a first embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of a wedge friction vibration reduction device for a railway freight car bogie according to a second embodiment of the present invention;

[0022] Figure 4 It is a schematic structural diagram of an inclined wedge according to a second embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the lubricating body;

[0024] In the figure: inclined wedge body 1, main friction surface 11, auxiliary friction surface 12, connecting frame 13, frame top surface 131, frame side surface 132, frame front surface 133, frame inclined surface 1331, frame vertical surface 1332, flange 14, inclined wedge frame 15, inclined wedge front surface 151, inclined wedge inclined surface 1511, inclined wedge vertical surface 1512, inclined wedge side surface 152, mounting hole 2, and lubricating body 3. DETAILED DESCRIPTION

[0025] The following is a detailed description of the implementation of the present invention in conjunction with the implementation cases, but they do not constitute a limitation of the present invention and are only given as examples. At the same time, the advantages of the present invention will become clearer and easier to understand through the description.

[0026] like Figure 1 and Figure 2 As shown, the first embodiment of the present invention is an inclined wedge friction damping device for a railway freight car bogie, comprising an inclined wedge body 1, the inclined wedge body 1 having a main friction surface 11, the main friction surface 11 is provided with a plurality of mounting holes 2, the number and size of the mounting holes can be set according to actual needs, a lubricating body 3 is installed in the mounting hole 2, the lubricating body 3 is a solid lubricating material, and the material composition includes lubricating materials such as molybdenum disulfide and graphite. The lubricating body 3 protrudes from the surface of the main friction surface 11 by 0-1mm. In this embodiment, the inclined wedge body 1 adopts a constant friction inclined wedge body, and the constant friction inclined wedge body comprises a main friction surface 11, and auxiliary friction surfaces 12 are respectively arranged on both sides of the back of the main friction surface 11, and a connecting frame 13 is arranged between the two auxiliary friction surfaces 12; and a flange 14 protruding outward is respectively arranged on the outer side of each auxiliary friction surface 12. The connecting frame 13 includes a frame top surface 131, frame side surfaces 132 on both sides, and a frame front 133; the frame front 133 has an inclined frame slope 1331 and a frame vertical surface 1332, the upper end of the frame slope 1331 is connected to the frame top surface 131, and the bottom end of the frame slope 1331 is integrally connected to the frame vertical surface 1332; the two sides of the frame front 133 are respectively connected to the frame side surfaces 132.

[0027] like Figure 3 and Figure 4As shown, the inclined wedge friction damping device for a railway freight car bogie of the second embodiment of the present invention is different from the inclined wedge friction damping device for a railway freight car bogie of the first embodiment in that the inclined wedge body 1 of this embodiment adopts a variable friction inclined wedge body, and the variable friction inclined wedge body includes a main friction surface 11, and an inclined wedge frame 15 is arranged on the back of the main friction surface 11. The inclined wedge frame 15 includes an inclined wedge front face 151 and inclined wedge side faces 152 on both sides. The inclined wedge front face 151 has an inclined wedge inclined surface 1511 and an inclined wedge vertical surface 1512. The inclined wedge inclined surface 1511 and the inclined wedge vertical surface 1512 are integrally connected, and the two sides of the inclined wedge front face 151 are respectively connected to the inclined wedge side faces 152.

[0028] like Figure 5 As shown, the shape of the lubricating body 3 is a cylinder, and it can also be a cuboid or a cube. The shape of the mounting hole 2 matches the shape of the lubricating body 3, and the mounting hole can be a circular hole, or a rectangular or square hole. The lubricating body 3 protrudes from the surface of the main friction surface 11 by 0.2-0.8mm. The lubricating body 3 is installed in the mounting hole 2 by one of the methods of interference fit, metal pin fixation, metal key fixation, screw fixation, and sintering fixation, forming an integrated structure that will not fall out. After installation, the lubricating body 3 should be between 0-1mm higher than the main friction surface of the inclined wedge. During use, the lubricating body 3 wears along with the wear of the main friction surface, and powder is generated between the inclined wedge device and the wear plate of the bogie side frame column, generating the required vibration damping.

[0029] The present invention also provides a railway freight car bogie, comprising the above-mentioned inclined wedge friction vibration damping device for the railway freight car bogie, and also comprising a side frame and a bolster, wherein the inclined wedge friction vibration damping device is arranged at both ends of the bolster, and the bolster is installed on the side frame through the inclined wedge friction vibration damping device.

[0030] The present invention also provides a railway freight car, comprising the railway freight car bogie mentioned above.

[0031] The above are only specific embodiments of the present invention. It should be pointed out that any changes or substitutions that can be easily thought of by any technician familiar with the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. The rest not described in detail are prior arts.

Claims

1. A wedge friction damping device for a railway freight car bogie, characterized in that: The invention comprises an inclined wedge body (1), wherein the inclined wedge body (1) has a main friction surface (11), a plurality of mounting holes (2) are provided on the main friction surface (11), a lubricating body (3) is installed in the mounting hole (2), and the lubricating body (3) protrudes from the surface of the main friction surface (11) by 0-1 mm.

2. The wedge friction damping device for railway freight car bogie according to claim 1, characterized in that: The inclined wedge (1) is a constant friction inclined wedge or a variable friction inclined wedge.

3. The wedge friction damping device for railway freight car bogie according to claim 2, characterized in that: The constant friction oblique wedge comprises a main friction surface (11), and auxiliary friction surfaces (12) are respectively arranged on both sides of the back side of the main friction surface (11), and a connecting frame (13) is arranged between the two auxiliary friction surfaces (12); and a flange (14) protruding outwards is respectively arranged on the outer side of each auxiliary friction surface (12).

4. The wedge friction damping device for railway freight car bogie according to claim 3 is characterized in that: The connecting frame (13) comprises a frame top surface (131), frame side surfaces (132) on both sides, and a frame front surface (133); the frame front surface (133) has an inclined frame inclined surface (1331) and a frame vertical surface (1332); the upper end of the frame inclined surface (1331) is connected to the frame top surface (131), and the bottom end of the frame inclined surface (1331) is integrally connected to the frame vertical surface (1332); the two sides of the frame front surface (133) are respectively connected to the frame side surfaces (132).

5. The wedge friction vibration reduction device for a railway freight car bogie according to claim 2, characterized in that: The variable friction inclined wedge body comprises a main friction surface (11), a inclined wedge frame (15) is arranged on the back of the main friction surface (11), the inclined wedge frame (15) comprises an inclined wedge front face (151) and inclined wedge side faces (152) on both sides, the inclined wedge front face (151) has an inclined inclined wedge inclined face (1511) and an inclined wedge vertical face (1512), the inclined wedge inclined face (1511) and the inclined wedge vertical face (1512) are integrally connected, and the two sides of the inclined wedge front face (151) are respectively connected to the inclined wedge side faces (152).

6. The wedge friction vibration reduction device for a railway freight car bogie according to any one of claims 1 to 5, characterized in that: The lubricating body (3) protrudes from the surface of the main friction surface (11) by 0.2-0.8 mm.

7. The wedge friction damping device for a railway freight car bogie according to any one of claims 1 to 5, characterized in that: The shape of the lubricating body (3) is a cylinder, a cuboid or a cube, and the shape of the mounting hole (2) matches the shape of the lubricating body (3).

8. The wedge friction vibration reduction device for a railway freight car bogie according to any one of claims 1 to 5, characterized in that: The lubricating body (3) is installed in the installation hole (2) by using one of the following methods: interference fit, metal pin fixation, metal key fixation, screw fixation, and sintering fixation.

9. A railway freight car bogie, characterized in that: The invention comprises the inclined wedge friction vibration reduction device for a railway freight car bogie as claimed in any one of claims 1 to 8.

10. A railway freight car, characterized in that: Including the railway freight car bogie as described in claim 9.

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