A dry wheel rim lubrication device for railway vehicles

Abstract

The present invention discloses a dry wheel rim lubrication device for rail vehicles, comprising a tube body, a mounting plate disposed on the tube body, a latch disposed within the tube body, the tail of the latch being connected and fixed to the side wall of the tube body via a locking pin, a first coil spring disposed at the head of the latch, a lubrication block disposed within the tube body, and a second coil spring disposed on the side of the first coil spring facing the lubrication block. One end of each of the first and second coil springs is disposed at the head of the latch pin via a fixing member, and the other ends of the first and second coil springs contact the tail end of the lubrication block. The extended length of the second coil spring is less than the extended length of the first coil spring. The present invention increases the service life of the coil springs and significantly reduces the maintenance cost of the dry wheel rim lubrication device.

Description

Technical Field

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

[0002] Wheel rim lubrication systems on rail vehicles can reduce friction between the vehicle wheel rims and the track, alleviating wheel rim wear, lowering vehicle operating and track maintenance costs, and minimizing noise generated by lateral compression between the wheel rims and the track during operation. Wheel rim lubrication systems are primarily categorized as wet-type and dry-type.

[0003] The dry wheel rim lubrication system utilizes a solid lubricant block. The system consists of a solid lubricant block and its supporting and securing mechanism. During vehicle operation, the block is applied to the wheel rim surface through the thrust of a spring in the securing mechanism, which then transfers the lubricant to the track and the next wheel. The dry wheel rim lubrication system features a simple structural design, requires no electronic control system, is easy to manage, and is low-cost. Furthermore, the dry solid lubricant block material exhibits strong adhesion, easy film formation, extreme pressure resistance, and long-lasting properties, resulting in outstanding wear reduction.

[0004] like Figure 1-Figure 3 As shown, a conventional dry wheel rim lubrication device comprises a tubular body 1, a mounting plate 2, a latch 3, a locking pin 4, and a lubricating block 6. The tubular body 1 is hollow and is used to mount the lubricating block 6 and the latch 3. The lubricating block 6 of the dry wheel rim lubrication device is mounted on the bogie via the tubular body 1. A first coil spring 5 disposed within the tubular body 1 provides a permanent thrust, pressing the lubricating block against the wheel rim surface.

[0005] The current problem is that the coil spring in the lubrication system tends to break after about a year and a half of vehicle operation, increasing vehicle maintenance costs. Analysis reveals that the coil spring is rigidly riveted to the latch. As the lubricating block wears, the coil spring gradually curls closer to the riveted connection, significantly increasing its stiffness while decreasing its elasticity. Therefore, if the lubricating block is not promptly refilled when the last remaining lubricating block is removed, the reciprocating motion of the wheel pushes against the block, causing the coil spring to stretch repeatedly near the riveted connection, leading to the coil spring breaking. Summary of the Invention

[0006] The present invention aims to solve the above technical problems and provide a dry wheel rim lubrication device for railway vehicles, so as to avoid the 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:

[0008] 14. The lubricating device of claim 13, wherein the cam is secured to the chassis and has a camming element configured to engage a plurality of locking portions of the chassis, wherein the camming element is secured to the chassis and has a plurality of locking portions configured to engage a plurality of locking portions of the chassis.

[0009] 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 provided entirely by the curling of the first coil spring, and the second coil spring remains in an extended state; if the length of the lubricating block remaining 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 repeatedly bends is 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.

[0010] It should be noted that in this technical solution, the end of the lubricating block that extends out of the tube body forms the head portion of the latch, tube body, and lubricating block, while the opposite end forms the tail portion of the latch and lubricating block. During installation, the lubricating block is inserted into the slider steel tube from the head portion of the tube body, pushing the first and second coil springs to straighten toward the tail portion of the tube body.

[0011] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization:

[0012] In order to enhance 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.

[0013] Furthermore, the curling section in this 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.

[0014] Therefore, when only the last lubricating block is left in the tube body or the length of the remaining lubricating block is small, the curled section of the second coil spring presses 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, forming 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.

[0015] 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 lubrication block.

[0016] In order to facilitate the installation of the first spring and the second spring, a pin is provided in the tube body, and the tail of the pin is fixedly connected to the side wall of the tube body through a lock pin; the front ends of the first coil spring and the second coil spring are both provided on the head of the pin through fixing parts.

[0017] 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 inside the tube body, and a rubber pad is provided between the limiting plate and the pin and is sleeved on the rivet; the limiting plate is circular.

[0018] Furthermore, the rubber pad is provided between the first coil spring and the latch, and the rubber pad is provided between the second coil spring and the limiting plate.

[0019] Furthermore, the rivet comprises a first column extending through the latch pin and a second column having a larger diameter than the first column; the stop plate is fixedly connected to the second column. When the rivet is not installed and tightened, the height C of the second column is less than the total height D of the coil spring and the elastic rubber pad when stacked.

[0020] Therefore, when the rivet is tightened, the end surface of the second column will be against the pin 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 pin or rivet.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) The rail vehicle dry wheel rim lubrication device of the present invention comprises a second coil spring disposed on the side of the first coil spring facing the lubricating block. When only the last lubricating block remains in the tube body or the remaining lubricating block is relatively short, the first coil spring and the second coil spring jointly provide thrust for the lubricating block, significantly reducing the bending stress of the coil spring at the riveted fixing portion and extending the service life of the coil spring.

[0023] 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 causes the overall stiffness of the two coil springs to change, forming a transition buffer area at the location of the curled section, and shifts the stiffness mutation point to an area away from the riveted 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.

[0024] 3) The rail vehicle dry wheel rim lubrication device of the present invention is provided with a fixing member. 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, reducing the pressure on the coil spring installation point and alleviating the sudden change in stiffness caused by the coil spring fixation.

[0025] 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

[0026] Figure 1 It is a schematic structural diagram of a dry wheel rim lubrication device in the background technology of the present invention;

[0027] Figure 2 It is a schematic structural diagram of a single lubricating block in the background technology of the present invention;

[0028] Figure 3 It is a structural diagram of a latch in the background technology of the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the rail vehicle dry wheel rim lubrication device of the present invention;

[0030] Figure 5 1 is a schematic diagram of the structure of the second coil spring of the present invention when viewed from above;

[0031] Figure 6 It is a structural schematic diagram of the fixing member of the present invention;

[0032] Figure 7 It is a partial enlarged view of the fixing part of the present invention.

[0033] In the figure

[0034] 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

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0036] 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 provided at the opening and extends into the tube body 1. A first coil spring 5 is provided 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 the end of the lubricating block 6 extending into the tube, and provides a thrust toward the opening direction 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 location, 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 provided 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 between the first coil spring 5 and the lubricating block 6, or curled between the first coil spring 5 and the lubricating block 6.

[0037] 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 provided on the tube body 1, a latch 3 is provided 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 provided at the head of the latch 3, and a lubrication block 6 is provided in the tube body 1.

[0038] A second coil spring 7 is provided on the side of the first coil spring 5 facing the lubricating block 6. The first coil spring 5 and the second coil spring 7 are stacked and riveted to 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.

[0039] 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 the 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 the 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.

[0040] 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.

[0041] According to coil spring stiffness theory, coil spring stiffness increases with increasing thickness and width. The coiled section 72 (S1 region) of the second coil spring 7 adopts a uniform variable cross-section design, with the thickness remaining unchanged and the width increasing linearly. 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.

[0042] When only the last lubricating block 6 is left in the tube body 1 or the remaining lubricating block 6 is short, 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, forming 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.

[0043] like Figure 6-Figure 7As shown, the fixing member 8 includes a rivet 81 mounted on the latch 3, and 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 3; the rubber pad 83 is provided between the first coil spring 5 and the latch 3, and the rubber pad 83 is provided between the second coil spring 7 and the limiting plate 82.

[0044] The rivet 81 includes a first column 811 passing through the pin 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 .

[0045] The existing technology directly fixes the coil spring to the latch with rivets, i.e., rigid riveting. This embodiment's installation method adds a rubber pad 83 between the first coil spring 5 and the latch 3, and between the second coil spring 7 and the stop plate 82. This allows the first and second coil springs 5 ​​and 7 to be elastically riveted to the latch 3. Compared to rigid riveting, elastic riveting can mitigate the sudden change in stiffness caused by coil spring riveting.

[0046] The rivet 81 features a stepped design, including a first column 811 that is plugged into and fixed to the latch 3, and a second column 812 positioned at one end of the first column 811 toward the inner side of the tube 1. When one end of the larger-diameter second column 812 contacts the latch 3, it limits further compression of the rubber pad, thereby preventing the installer from over-tightening the rivet. Before installation, the height C of the second column 812 must be less than the total height D of the stacked coil spring and elastic rubber pad. When the rivet 33 is installed and compressed, the second column 812 limits the height C of the step on the rivet 33 to the total height of the coil spring and the compressed rubber pad. The first and second coil springs 5 ​​and 7 are suspended between the two rubber pads 83, ensuring that the first and second coil springs 5 ​​and 7 do not come into rigid contact with the latch or rivet. Furthermore, the circular stopper 82 prevents the coil springs from breaking during installation.

[0047] 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.

[0048] The contents illustrated 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 modifications of the present invention by those skilled in the art shall fall within the scope defined by the claims attached to this application.

Claims

1. A dry wheel rim lubrication device for a railway vehicle, comprising a tube body (1), one end of which is open, a lubricating block (6) being provided at the opening and extending into the tube body (1), a first coil spring (5) being provided in the tube body (1), one end of the first coil spring (5) being fixed near the open end by a fixing member (8), the other end of the first coil spring (5) being curled and in contact with the end of the lubricating block (6) extending into the tube, and providing a thrust toward the opening of the tube body (1); characterized in that: 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 coiled 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 stacked.

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 extended length of the second coil spring (7) 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 (3) is provided in the tube body (1), and the tail of the latch (3) is fixedly connected to the side wall of the tube body (1) via a lock pin (4); the front ends of the first coil spring (5) and the second coil spring (7) are both provided on the head of the latch (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 (3); a limiting plate (82) is provided at one end of the rivet (81) located inside the tube (1); a rubber pad (83) sleeved on the rivet (81) is provided between the limiting plate (82) and the latch (3); and 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) penetrating the latch pin (3); 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 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 (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.

Images