Dry-type rim lubricating device for railway vehicle

Abstract

The invention discloses a rail vehicle dry-type rim lubricating device which comprises a pipe body, a mounting plate is arranged on the pipe body, a plug pin is arranged in the pipe body, the tail of the plug pin is fixedly connected with the side wall of the pipe body through a lock pin, a first coil spring is arranged at the head of the plug pin, a lubricating block is arranged in the pipe body, and the lubricating block is connected with the plug pin. A second coil spring is arranged on the side, facing the lubricating block, of the first coil spring. One end of the first coil spring and one end of the second coil spring are arranged at the head of the plug pin through fixing pieces, and the other end of the first coil spring and the other end of the second coil spring make contact with the tail end of the lubricating block; and the extended length of the second coil spring is smaller than the extended length of the first coil spring. The service life of the coil spring is prolonged, and the maintenance cost of the dry-type rim lubricating device is greatly reduced.

Description

Technical Field

[0001] The invention relates to a rail vehicle dry wheel rim lubrication device, belonging to the technical field of rail transit vehicles. Background Art

[0002] The wheel rim lubrication device on the rail vehicle can reduce the friction between the vehicle wheel rim and the track, reduce the wheel rim wear, reduce the vehicle operation and track maintenance costs, and reduce the noise generated by the lateral squeezing between the wheel rim and the track during the operation of the wheel. The wheel rim lubrication device is mainly divided into a wet wheel rim lubrication device and a dry wheel rim lubrication device.

[0003] The dry wheel rim lubrication device uses solid lubricating blocks for lubrication. The system consists of a solid lubricating block and its bearing and fixing mechanism. During vehicle operation, the lubricating block is applied to the wheel rim surface through the thrust of the spring in the fixing mechanism, and then the lubricant is transferred to the track and the next wheel. The dry wheel rim lubrication device has a simple structural design, does not require an electronic control system, is easy to manage, and has low cost. In addition, the dry solid lubricating block material has the characteristics of strong adhesion, easy film formation, extreme pressure resistance, good long-term performance, and outstanding wear reduction effect.

[0004] like Figure 1-Figure 3 As shown, the prior art dry wheel rim lubricating device comprises a tube body 1, a mounting plate 2, a latch 3, a lock pin 4, and a lubricating block 6; wherein the tube body 1 is hollow inside and is used to mount the lubricating block 6 and the latch 3. The lubricating block 6 of the dry wheel rim lubricating device is mounted on the bogie through the tube body 1, and a permanent thrust is provided by a first coil spring 5 arranged in the tube body 1, so that the lubricating block is pressed against the surface of the wheel rim.

[0005] The current problem is that the coil spring in the lubrication device is prone to breakage after the vehicle has been in operation for about a year and a half, resulting in increased vehicle maintenance costs. After analysis, the coil spring is rigidly riveted to the pin. As the lubrication block wears, the coil spring gradually curls and approaches the riveted fixed position, and the stiffness of the coil spring itself increases significantly while the elasticity decreases. Therefore, when the last lubrication block is left, if the lubrication block is not filled in time, the reciprocating motion of the wheel pushes the lubrication block, causing the coil spring to stretch back and forth more times near the riveted fixed area, thus causing the coil spring to break. Summary of the invention

[0006] The present invention aims to solve the above technical problems and provide a rail vehicle dry wheel rim lubrication device to avoid reciprocating bending and stretching of the coil spring near the riveted fixing area, thereby increasing the service life of the dry wheel rim lubrication device and reducing maintenance costs.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A rail vehicle dry wheel rim lubrication device comprises a tube body, one end of which is an opening, a lubricating block is arranged at the opening and extends into the tube body, a first coil spring is arranged in the tube body, one end of the first coil spring is fixed near the opening end by a fixing member, and the other end is curled and contacts with the end of the lubricating block extending into the tube, and provides a thrust in the direction of the opening of the tube body; the size of the end of the lubricating block in contact with the first coil spring is smaller than the inner cavity of the tube body at this point, so that the lubricating block, the first coil spring and the tube body enclose a accommodating space, and a second coil spring is arranged in the accommodating space, one end of the second coil spring is fixed at a position closer to the opening of the tube body than the first coil spring, and the other end extends between the first coil spring and the lubricating block, or is curled between the first coil spring and the lubricating block; the length of the second coil spring after extension is smaller than the length of the first coil spring after extension.

[0008] Thus, by arranging a second coil spring on the side of the first coil spring facing the lubricating block, when the length of the lubricating block in the tube body is sufficient, the thrust of the lubricating block is completely provided by the curling of the first coil spring, and the second coil spring remains in an extended state; if the length of the remaining lubricating block in the tube body is less than the length of the second coil spring, the rear end of the second coil spring begins to curl in the accommodating space and contacts the lubricating block. At this time, the first coil spring and the second coil spring jointly provide thrust to the lubricating block; when only the last lubricating block is left in the tube body or the length of the remaining lubricating block is very small, the curled part of the second coil spring is completely curled and curled in the accommodating space. The curled part of the second coil spring isolates the curled part of the first coil spring from the fixing part, so that the position where the first coil spring is repeatedly bent is far away from the fixing part, which can significantly reduce the bending stress of the coil spring at the riveted fixing part and extend the service life of the coil spring.

[0009] It should be noted that in the present technical solution, the end of the lubricating block extending out of the tube body is the head of the plug, the tube body and the lubricating block, and the opposite end is the tail of the plug and the lubricating block. When installing the lubricating block, the lubricating block is inserted into the slider steel tube from the head of the tube body, and pushes the first coil spring and the second coil spring to straighten toward the tail of the tube body.

[0010] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization: In order to increase the service life of the second coil spring and prevent the second coil spring from being repeatedly folded and stretched at the riveted position, the second coil spring is further stacked with the first coil spring; the second coil spring includes an installation section fixed to the pin through a fixing member and a curling section connected to the installation section and extending away from the fixing member.

[0011] Furthermore, the curling section in the present solution adopts a linear variable cross-section design, and the cross-sectional width of the curling section gradually decreases in the direction away from the fixing member.

[0012] Therefore, when there is only the last lubricating block left in the tube body or the remaining lubricating block is short, the curled section of the second coil spring is against the tail of the lubricating block. When the lubricating block moves repeatedly, the curled section with gradually decreasing cross-sectional width can make the overall stiffness of the two coil springs change to form a transition buffer area at the position of the curled section, so that the position of the stiffness mutation is far away from the riveted fixing point; it also ensures that the second coil spring will not be repeatedly stretched in the stiffness mutation area, thereby ensuring the service life of the second coil spring.

[0013] In order to allow the second coil spring to bend at a suitable position and cooperate with the first coil spring, the length of the second coil spring after extension is 0.4-0.6 times the length of the first coil spring. The length of the second coil spring is 1-1.5 times the length of a single plug-in lubricating block.

[0014] In order to facilitate the installation of the first spring and the second spring, a latch is provided in the tube body, and the tail of the latch is fixedly connected to the side wall of the tube body through a locking pin; the front ends of the first coil spring and the second coil spring are both arranged on the head of the latch through fixing parts.

[0015] In order to avoid rigid contact between the first coil spring, the second coil spring and the fixing member, the fixing member further includes a rivet installed on the pin, a limiting plate is provided at one end of the rivet located on the inner side of the tube body, and a rubber pad sleeved on the rivet is provided between the limiting plate and the pin; the limiting plate is circular.

[0016] Furthermore, the rubber pad is arranged between the first coil spring and the latch, and the rubber pad is arranged between the second coil spring and the limiting plate.

[0017] Furthermore, the rivet comprises a first column inserted on the latch and a second column with a diameter larger than the first column; the limit plate is fixedly connected to the second column. When the rivet is not installed and pressed, the height C of the second column is smaller than the total height D of the coil spring and the elastic rubber pad stacked together.

[0018] Therefore, when the rivet is compressed, the end surface of the second column will be against the latch due to the limiting effect of the second column, and the first coil spring and the second coil spring will be located between the two rubber pads, avoiding rigid contact between the first coil spring, the second coil spring and the latch or the rivet.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1) The rail vehicle dry wheel rim lubrication device of the present invention is provided with a second coil spring on the side of the first coil spring facing the lubricating block. When only the last lubricating block is left in the tube body or the remaining lubricating block is short, the first coil spring and the second coil spring jointly provide thrust for the lubricating block, which can significantly reduce the bending stress of the coil spring at the riveted fixing portion and extend the service life of the coil spring.

[0020] 2) The rail vehicle dry wheel rim lubrication device of the present invention changes the cross-sectional size of the curled portion of the second coil spring. The curled portion adopts a linear variable cross-sectional design. The second coil spring changes the overall stiffness of the two coil springs to form a transition buffer area at the curled section, and moves the stiffness mutation point to an area away from the riveting position, ensuring that the second coil spring will not be repeatedly stretched in the stiffness mutation area, thereby extending the service life of the second coil spring.

[0021] 3) The rail vehicle dry wheel rim lubrication device of the present invention is provided with a fixing part. When the rivet is tightened, it will be limited by the second column. The first coil spring and the second coil spring are elastically riveted to the pin, which reduces the pressure on the coil spring installation and alleviates the sudden change in stiffness caused by the coil spring fixing.

[0022] 4) The rail vehicle dry wheel rim lubrication device of the present invention can increase the service life of the coil spring and greatly reduce the maintenance cost of the dry wheel rim lubrication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of a dry wheel rim lubrication device in the background technology of the present invention; Figure 2 It is a structural schematic diagram of a single lubricating block in the background technology of the present invention; Figure 3 It is a structural schematic diagram of a latch in the background technology of the present invention; Figure 4 It is a schematic diagram of the internal structure of the rail vehicle dry wheel rim lubrication device of the present invention; Figure 5 is a schematic diagram of the structure of the second coil spring of the present invention when viewed from above; Figure 6 It is a structural schematic diagram of the fixing member of the present invention; Figure 7 It is a partial enlarged view of the fixing part of the present invention.

[0024] In the figure 1-tube body; 2-mounting plate; 3-latch pin; 4-locking pin; 5-first coil spring; 6-lubricating block; 7-second coil spring; 71-mounting section; 72-curling section; 8-fixing piece; 81-rivet; 811-first column; 812-second column; 82-limiting plate; 83-rubber pad. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0026] like Figure 4 As shown, the rail vehicle dry wheel rim lubrication device of this embodiment includes a tube body 1, one end of which is open, and a lubricating block 6 is arranged at the opening and extends into the tube body 1, and a first coil spring 5 is arranged in the tube body 1, one end of the first coil spring 5 is fixed near the open end by a fixing member 8, and the other end is curled and contacts with the end of the lubricating block 6 extending into the tube, and provides a thrust in the direction of the opening of the tube body 1; the size of the end of the lubricating block 6 in contact with the first coil spring 5 is smaller than the inner cavity of the tube body 1 at this point, so that the lubricating block 6, the first coil spring 5 and the tube body 1 enclose a accommodating space, and a second coil spring 7 is arranged in the accommodating space, one end of the second coil spring 7 is fixed at a position closer to the opening of the tube body 1 than the first coil spring 5, and the other end extends to between the first coil spring 5 and the lubricating block 6, or curled between the first coil spring 5 and the lubricating block 6.

[0027] like Figure 4 As shown, the rail vehicle dry wheel rim lubrication device of this embodiment includes a tube body 1, a mounting plate 2 is arranged on the tube body 1, a latch 3 is arranged in the tube body 1, the tail of the latch 3 is connected and fixed to the side wall of the tube body 1 through a locking pin 4, a first coil spring 5 is arranged at the head of the latch 3, and a lubrication block 6 is arranged in the tube body 1.

[0028] A second coil spring 7 is provided on the side of the first coil spring 5 facing the lubricating block 6, and the first coil spring 5 and the second coil spring 7 are stacked and riveted and fixed on the pin 3 in the tube body; one end of the first coil spring 5 and the second coil spring 7 are both provided on the head of the pin 3 through a fixing member 8, and the other ends of the first coil spring 5 and the second coil spring 7 are in contact with the tail end of the lubricating block 6; the length of the second coil spring 7 after extension is less than the length of the first coil spring 5 after extension, and the length of the second coil spring 7 after extension is 0.4-0.6 times the length of the first coil spring 5. For a single lubricating block of standard specifications, the length of the second coil spring 5 after extension is 1-1.5 times the length of a single plug-in lubricating block.

[0029] When the length of the lubricating block in the tube body 1 is sufficient, the thrust to the lubricating block 6 is completely provided by the curling of the first coil spring 5, and the second coil spring 7 remains in an extended state; if the length of the lubricating block remaining in the tube body 1 is less than the total length of the second coil spring 7 after extension, the second coil spring 7 is curled on the inner side of the first coil spring 5 toward one side of the lubricating block 6, and the curled part of the second coil spring 7 will press against the tail of the lubricating block 6. The first coil spring 5 and the second coil spring 7 jointly provide thrust to the lubricating block 6, which can significantly reduce the bending stress of the coil spring at the riveted fixing part and extend the service life of the coil spring.

[0030] like Figure 5 As shown, the second coil spring 7 includes a mounting section 71 connected and fixed to the latch 3 via a fixing member 8, and a curling section 72 connected to the mounting section 71 and extending away from the fixing member 8; the cross-sectional width of the curling section 72 gradually decreases in the direction away from the fixing member 8.

[0031] According to coil spring stiffness theory, coil spring stiffness increases with increasing thickness and width. The curled section 72 (S1 region) of the second coil spring 7 adopts a uniform variable cross-section design, with a linear increase in width while the thickness remains unchanged. This allows a transition buffer region S1 to exist for the overall stiffness change of the first coil spring 5 and the second coil spring 7.

[0032] When only the last lubricating block 6 is left in the tube body 1 or the remaining lubricating block 6 is of a small length, the curled section 72 of the second coil spring 7 presses against the tail of the lubricating block 6. When the lubricating block 6 moves repeatedly, the curled section 72 with a gradually decreasing cross-sectional width can make the overall stiffness of the two coil springs change to form a transition buffer area at the position of the curled section 72, so that the position of the stiffness mutation is far away from the riveted fixing point; it also ensures that the second coil spring 7 will not be repeatedly stretched in the stiffness mutation area, thereby ensuring the service life of the second coil spring 7.

[0033] like Figure 6-Figure 7 As shown, the fixing member 8 includes a rivet 81 installed on the latch pin 3, a circular limiting plate 82 is provided at one end of the rivet 81 located on the inner side of the tube body 1, and a rubber pad 83 sleeved on the rivet 81 is provided between the limiting plate 82 and the latch pin 3; the rubber pad 83 is provided between the first coil spring 5 and the latch pin 3, and the rubber pad 83 is provided between the second coil spring 7 and the limiting plate 82.

[0034] The rivet 81 includes a first column 811 penetrated on the plug 3 , and a second column 812 having a diameter larger than that of the first column 811 is provided at one end of the first column 811 facing the inner side of the tube 1 ; the limiting plate 82 is fixedly connected to the second column 812 .

[0035] The prior art is to directly fix the coil spring to the latch pin with rivets, i.e., rigid riveting fixation. The installation method of this embodiment adds a rubber pad 83 between the first coil spring 5 and the latch pin 3 and between the second coil spring 7 and the limit plate 82, so that the first coil spring 5 and the second coil spring 7 can be elastically riveted to the latch pin 3. Compared with rigid riveting, the elastic riveting method can alleviate the sudden change in stiffness caused by the coil spring riveting fixation.

[0036] The rivet 81 adopts a step design, including a first column 811 plugged and fixed with the bolt 3 and a second column 812 arranged at one end of the first column 811 facing the inner side of the tube 1. When one end of the second column 812 with a large diameter contacts the bolt 3, the continued compression of the rubber pad can be limited, thereby preventing the installer from over-pressing the rivet. When not installed, the height C of the second column 812 must be less than the total height D of the stacked coil spring and the elastic rubber pad. When the rivet 33 is installed and compressed, it is limited by the second column 812. The height C of the step of the rivet 33 is equal to the total height of the coil spring and the compressed rubber pad. The first coil spring 5 and the second coil spring 7 will be suspended between the two rubber pads 83, which can ensure that the first coil spring 5 and the second coil spring 7 will not be in rigid contact with the bolt or the rivet. At the same time, the circular limit plate 82 will also prevent the coil spring from breaking at the installation position.

[0037] The rail vehicle dry wheel rim lubrication device of this embodiment can increase the service life of the coil spring and greatly reduce the maintenance cost of the dry wheel rim lubrication device.

[0038] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

Claims

1. A rail vehicle dry wheel rim lubrication device, comprising a tube body (1), one end of which is open, a lubricating block (6) is arranged at the opening and extends into the tube body (1), a first coil spring (5) is arranged in the tube body (1), one end of the first coil spring (5) is fixed near the open end by a fixing member (8), the other end of the first coil spring (5) is curled and contacts with the end of the lubricating block (6) extending into the tube, and provides a thrust in the direction of the opening of the tube body (1); the characteristics are: The size of the end of the lubricating block (6) in contact with the first coil spring (5) is smaller than the inner cavity of the tube body (1) at this location, so that the lubricating block (6), the first coil spring (5) and the tube body (1) enclose a receiving space, in which a second coil spring (7) is arranged, one end of the second coil spring (7) is fixed at a position closer to the opening of the tube body (1) than the first coil spring (5), and the other end extends between the first coil spring (5) and the lubricating block (6), or is curled between the first coil spring (5) and the lubricating block (6); the length of the second coil spring (7) after extension is smaller than the length of the first coil spring (5) after extension.

2. The rail vehicle dry wheel rim lubrication device according to claim 1, characterized in that: The second coil spring (7) and the first coil spring (5) are arranged to overlap each other.

3. The rail vehicle dry wheel rim lubrication device according to claim 1, characterized in that: The second coil spring (7) comprises a mounting section (71) connected to the fixing member (8) and a curling section (72) connected to the mounting section (71) and extending in a direction away from the fixing member (8).

4. The rail vehicle dry wheel rim lubrication device according to claim 3, characterized in that: The cross-sectional width of the curled section (72) gradually decreases in a direction away from the fixing member (8).

5. The rail vehicle dry wheel rim lubrication device according to any one of claims 1 to 4, characterized in that: The length of the second coil spring (7) after extension is 0.4-0.6 times the extended length of the first coil spring (5).

6. The rail vehicle dry wheel rim lubrication device according to claim 1, characterized in that: A latch pin (3) is arranged in the tube body (1), and the tail of the latch pin (3) is fixedly connected to the side wall of the tube body (1) via a locking pin (4); the front ends of the first coil spring (5) and the second coil spring (7) are both arranged on the head of the latch pin (3) via a fixing member (8).

7. The rail vehicle dry wheel rim lubrication device according to claim 6, characterized in that: The fixing member (8) comprises a rivet (81) mounted on the latch pin (3); a limiting plate (82) is provided at one end of the rivet (81) located inside the tube body (1); a rubber pad (83) sleeved on the rivet (81) is provided between the limiting plate (82) and the latch pin (3); the limiting plate (82) is circular.

8. The rail vehicle dry wheel rim lubrication device according to claim 7, characterized in that: The rivet (81) comprises a first column (811) which is penetrated by the latch pin (3); a second column (812) having a diameter greater than that of the first column (811) is provided at one end of the first column (811) which faces the inner side of the tube body (1); and the limiting plate (82) is fixedly connected to the second column (812).

9. The rail vehicle dry wheel rim lubrication device according to claim 7, characterized in that: The rubber pad (83) is provided between the first coil spring (5) and the latch pin (3), and the rubber pad (83) is provided between the second coil spring (7) and the limiting plate (82).

10. The rail vehicle dry wheel rim lubrication device according to claim 8, characterized in that: When not installed and pressed, the height C of the second column (812) is less than the total height D of the coil spring and the elastic rubber pad stacked together.

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