A rolling contact bogie axle end grounding device structure

Abstract

The present invention discloses a rolling contact bogie axle end grounding device structure, comprising a wheel axle and a wheel axle end cover, wherein one end of the wheel axle end cover is connected to the wheel axle, and the other end of the wheel axle end cover is provided with a grounding structure, wherein the grounding structure comprises a concave body and a movable body, wherein the concave body is fixed on the wheel axle end cover, and the concave body and the movable body are in rolling contact, and a grounding wire group is provided on the movable body; the movable body is provided with a roller groove, a roller is installed in the roller groove, and a roller compression spring is provided between the roller and the roller groove; the invention solves the problems of the existing structure having a large friction area, a large friction angular velocity of the contact surface, a complex structural composition, and a high difficulty in processing components.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to a bogie axle end grounding device structure with rolling contact. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance some understanding of the overall background of the disclosure and should not be necessarily regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

[0003] The bogie grounding device is effectively grounded through the contact between the wheels and the rails. The wheels rotate at high speed during vehicle operation, so it is difficult to achieve effective contact between the stationary parts of the frame and the rotating parts of the wheel axle and ensure reliable grounding performance.

[0004] There are many different structures now, and there is good application experience, which can also meet the grounding requirements well. However, some devices are complex in structure and have many components. Most of these devices use a plane as the contact surface. In order to meet the requirements of the complex structure, the contact plane can only be placed on the edge of the circular plane at the end of the shaft. Such a structure makes the angular velocity of the contact surface larger during rotation, the wear during movement is also larger, and the heat generated is more.

[0005] In view of this, this patent application is hereby filed. Summary of the Invention

[0006] The purpose of the present invention is to provide a rolling contact bogie axle end grounding device structure, which solves the problems of large friction area, large friction angular velocity of the contact surface, complex structure and difficult component processing in the existing structure.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is: a rolling contact bogie axle end grounding device structure, including a wheel axle and a wheel axle end cover, one end of the wheel axle end cover is connected to the wheel axle, and the other end of the wheel axle end cover is provided with a grounding structure, the grounding structure includes a concave body and a movable body, the concave body is fixed on the wheel axle end cover, the concave body and the movable body are in rolling contact, and a grounding wire group is provided on the movable body; the movable body is provided with a roller groove, a roller is installed in the roller groove, and a roller compression spring is provided between the roller and the roller groove.

[0008] The roller is a conical body, and the small diameter end of the roller is close to the center of the movable body. The roller groove and the large diameter end of the roller are correspondingly provided with a circular groove, and the roller groove and the small diameter end of the roller are correspondingly provided with a clamping groove. The small diameter of the roller is clamped in the clamping groove, and a ball is arranged in the circular groove. The ball and the large diameter end of the roller form a top ball structure.

[0009] It also includes a fixed bracket and a grounding end cover. The movable body is movably connected to the fixed bracket. A spring is arranged between the movable body and the grounding end cover. One end of the spring is installed on the movable body and the other end is installed on the adjustment block. The adjustment block is movably connected to the grounding end cover.

[0010] A circular groove is opened in the center of the concave body; a plurality of limiting grooves are set on the edge of the movable body, and limiting bosses are set corresponding to the limiting grooves on the fixed bracket. The movable body contacts the limiting bosses on the fixed bracket through the limiting grooves to limit the axial movement of the movable body.

[0011] A connecting rod is provided between the movable body and the grounding end cover, and the spring is sleeved on the connecting rod.

[0012] An adjusting boss is provided on the grounding end cover, and the grounding end cover and the adjusting boss, and the adjusting boss and the adjusting block are connected via adjusting bolts. Both the grounding end cover and the adjusting block are provided with holes for passing the connecting rod.

[0013] The movable body has a plurality of binding posts evenly distributed on a plane on one side of the connecting rod. One end of the grounding wire group is connected to the binding post, and the other end is fixed on the fixing bracket.

[0014] The shape of the adjustment block is triangular, which is consistent with the shape of the adjustment boss. The adjustment block is sealed with the grounding end cover and the connecting shaft of the movable body through a sealing ring.

[0015] The movable body and the spring are correspondingly arranged in the movable body spring slot, the adjustment block and the spring are correspondingly arranged in the adjustment block spring slot, one end of the spring is clamped in the movable body spring slot, and the other end is clamped in the adjustment block spring slot.

[0016] A sealing cover is provided on the outer side of the adjusting boss to block external dust and water.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention places rollers on a movable body, which can move along the wheel axis to compensate for contact surface wear. Roller grooves are designed into the movable body to accommodate the rollers, which can rotate around the center of the movable body or independently. When in contact with convex surfaces, rolling contact reduces friction, wear, and heat generated by friction. Compared to existing vehicle designs, the present invention utilizes rolling contact to reduce frictional losses, and its adjustable structure lowers maintenance costs. It surpasses existing grounding device structures used on EMU vehicles in many aspects, including manufacturing. Widespread application could potentially save costs.

[0019] 2. The present invention uses the linear contact surface between the roller and the movable body as the friction surface to form a rolling friction surface, thereby reducing the amount of friction and the generation of frictional heat, and extending the service life of the components and maintenance costs.

[0020] 3. By simplifying the components of the grounding device, simplifying the design structure, reducing the complexity of component processing, and saving processing and installation labor costs; the overall grounding device has a simple structural design, easy installation and disassembly, and low processing and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram for use in the present invention;

[0022] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the explosion structure from another angle of the present invention

[0024] Figure 4 is a cross-sectional view of the present invention;

[0025] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of A in the middle.

[0026] 1. Concave body; 101. Circular groove; 2. Movable body; 201. Limiting groove; 211; 212; 3. Connecting rod; 4. Grounding conduit; 5. Fixed bracket; 6. Spring; 7. Adjusting block; 8. Grounding end cover; 801. Adjusting boss; 9. Axle end cover; 10. Adjusting bolt; 11. Sealing cover; 12. Bogie frame; 15. Fastening bolt; 16. Fourth sealing ring; 17. Third sealing ring; 18. First sealing ring; 19. Second sealing ring; 20. Axle; 21. Roller; 22. Roller compression spring; 23. Ball. DETAILED DESCRIPTION

[0027] In order to clearly illustrate the technical features of this solution, the solution is described below through specific implementation methods and in conjunction with the accompanying drawings.

[0028] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations and / or combinations thereof.

[0030] like Figure 1-Figure 5As shown, a rolling contact bogie axle end grounding device structure includes a wheel axle 20 and a wheel axle end cover 9, one end of the wheel axle end cover 9 is connected to the wheel axle 20, and the other end of the wheel axle end cover 9 is provided with a grounding structure, the grounding structure includes a concave body 1 and a movable body 2, the concave body 1 is fixed on the wheel axle end cover 9, the concave body 1 and the movable body 2 are in rolling contact, and a grounding wire group 4 is provided on the movable body 2; the movable body 2 is provided with a roller groove 201, a roller 21 is installed in the roller groove 201, and a roller compression spring 22 is provided between the roller 21 and the roller groove 201.

[0031] The roller 21 is a conical body according to the shape of the circular movable body 2. The small diameter end of the roller 21 is close to the center of the movable body 2. The roller groove 201 and the large diameter end of the roller 21 are correspondingly provided with a circular groove 212. The roller groove 201 and the small diameter end of the roller 21 are correspondingly provided with a clamping groove 211. The small diameter of the roller 21 is clamped in the clamping groove 211. The ball 23 is provided in the circular groove 212. The ball 23 and the large diameter end of the roller 21 form a top ball structure. The roller 21 can roll by itself or rotate as a whole in the groove.

[0032] The roller groove 201 is an inclined surface with notches at both ends. The inner notch near the center of the movable body 2 is square, while the outer notch is circular.

[0033] Specifically, the convex body 1 and the movable body 2 are in rolling contact, and the spring 6 applies a predetermined pressing force to the movable body 2 to ensure close contact between the two.

[0034] Specifically, the bogie frame 12 transmits current to the wheels through the spherical contact of the ends of the wheel axles 20, and realizes the grounding function through the contact between the wheels and the rails.

[0035] During operation, the concave body 1 at the end of the axle 20 rotates at high speed, while the bogie frame 12 and movable body 2 remain relatively stationary. Spherical contact between the rotating concave body 1 and movable body 2 creates a certain amount of friction. Spring 6 applies a specified compressive force to movable body 2, ensuring close contact between the two. Adjusting bolt 10 adjusts the preload of spring 6. With the concave body 1 in spherical contact fixed to the axle 20, compensating for the friction must be accomplished by movable body 2. This requires axial movement and a uniform compressive force to ensure contact between the convex and concave bodies. A circular spring 6 is provided on movable body 2, preloaded, and adjusted as the preload is released.

[0036] It also includes a fixed bracket 5 and a grounding end cover 8. The movable body 2 is movably connected to the fixed bracket 5. A spring 6 is arranged between the movable body 2 and the grounding end cover 8. One end of the spring 6 is installed on the movable body 2, and the other end is installed on the adjustment block 7. The adjustment block 7 is movably connected to the grounding end cover 8.

[0037] Specifically, the axial movement of the movable body 2 in the wheel axle 20 is restricted by a fixed bracket 5 fixed to the bogie frame 12, and the movable body 2 is prevented from dislodging from the fixed bracket 5 due to the spring force. A welding cable is installed between the fixed bracket 5 and the movable body 2 to ensure the conduction of current between the fixed bracket 5 and the movable body 2.

[0038] A circular groove 101 is opened in the center of the concave body 1; a plurality of limiting grooves 201 are set on the edge of the movable body 2, and limiting bosses 501 are set corresponding to the limiting grooves 201 on the fixed bracket 5. The movable body 2 contacts the limiting bosses 501 on the fixed bracket 5 through the limiting grooves 201, thereby limiting the axial movement of the movable body 2.

[0039] A circular groove 101 is defined in the center of the concave body 1. Multiple limiting grooves 201 are defined along the edge of the movable body 2. The fixed bracket 5 includes corresponding limiting bosses corresponding to the limiting grooves 201. The movable body 2 contacts the limiting bosses on the fixed bracket 5 through the limiting grooves 201, restricting axial movement of the movable body 2. Specifically, the limiting bosses correspond to the limiting grooves 201, preventing the movable body 2 from axially moving or rotating along the axle 20 after pre-assembly.

[0040] A welding connecting rod 3 is provided between the movable body 2 and the grounding end cover 8 , and the spring 6 is sleeved on the connecting rod 3 .

[0041] Specifically, a square hole is formed in the center of each of the grounding end cap 8 and the adjustment block 7, while a circular hole is formed in the center of the movable body 2. A connecting rod 3 is welded to the grounding end cap 8. The other end of the connecting rod 3 is processed into a square shape and passes through the adjustment block 7 and the grounding end cap 8. The connecting rod 3 assists the limiting boss on the fixed bracket 5 in limiting the rotation of the movable body 2 as the concave body 1 rotates. The wear of the movable body is also monitored to adjust the spring preload in a timely manner.

[0042] An adjusting boss 801 is provided on the grounding end cover 8 , and the grounding end cover 8 and the adjusting boss 801 , and the adjusting boss 801 and the adjusting block 7 are connected via an adjusting bolt 10 . Both the grounding end cover 8 and the adjusting block 7 have holes for passing the connecting rod 3 .

[0043] Specifically, the grounding end cover 8 is fixed to the fixed bracket 5 by bolts, and the grounding end cover 8 and the fixed bracket 5 are sealed by a first sealing ring 18. The internal triangular adjustment boss 801 limits the rotation of the adjustment block 7. Three adjustment bolts are set on the grounding end cover 8, and the preload force of the spring 6 can be adjusted by adjusting the adjustment block 7.

[0044] The movable body 2 has a plurality of binding posts evenly distributed on a side plane of the connecting rod 3 . One end of the grounding wire group 4 is connected to the binding posts, and the other end is fixed to the fixing bracket 5 .

[0045] The fixing bracket 5 is fixed to the bogie frame 12 by fastening bolts 15 and fasteners thereof, and is sealed by a second sealing ring 19 .

[0046] The shape of the adjustment block 7 is triangular, which is consistent with the shape of the adjustment boss 801. The adjustment block 7 is sealed with the grounding end cover 8 and the connecting shaft of the movable body 2 by a sealing ring.

[0047] The movable body 2 and the spring 6 are correspondingly arranged in the movable body spring slot, and the adjustment block 7 and the spring 6 are correspondingly arranged in the adjustment block spring slot. One end of the spring 6 is clamped in the movable body spring slot, and the other end is clamped in the adjustment block spring slot.

[0048] Specifically, a third sealing ring 17 is provided between the connecting rod 3 and the adjustment block 7 ; and a fourth sealing ring 16 is provided between the connecting rod 3 and the grounding end cover 8 .

[0049] A sealing cover 11 is provided on the outside of the adjusting boss 801 to block external dust and water.

[0050] A method for pre-assembling and installing a rolling contact bogie axle end grounding device structure includes the following steps:

[0051] (1) The movable body 2, the roller 21 and the roller compression spring 22 are pre-assembled into a whole and then mounted on the frame by bolts;

[0052] (2) The fixing bracket 5 is welded together by a flange and a casting, and a hole is opened on the flange;

[0053] (3) Cut edge notches, a center hole, and a spring slot on the movable body 2, weld the connection 3, weld the ground wire assembly 4, and fix the selected spring 6 in the spring slot;

[0054] (4) Place the assembled movable body 2 inside the fixed bracket 5, and fix the upper grounding wire assembly to the opening of the fixed bracket 5 with bolts;

[0055] (5) Pre-install the fourth sealing ring 16 and the third sealing ring 17 onto the adjustment block 7. Pre-install the adjustment block 7 onto the triangular boss inside the grounding end cover 8, aligning the square opening;

[0056] (6) Install the grounding end cover 8 onto the fixed bracket 5 using standard parts such as nuts and washers, and set a sealing ring at the contact point between the grounding end cover 8 and the fixed bracket 5. Insert the end of the connecting rod 3 into the square hole of the adjustment block 7 and the grounding end cover 8. And put one end of the spring 6 into the spring slot of the adjustment block 7;

[0057] (7) The preassembled parts are fixed to the bogie frame 12 by bolts. The preload force of the spring 6 is adjusted to the appropriate level by adjusting the bolts 10 on the grounding end cover 8; and the rubber sealing cover 11 is covered.

[0058] The above embodiments are preferred implementation modes of the present disclosure, but the implementation modes of the present disclosure are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present disclosure should be considered as equivalent replacement methods and are included in the scope of protection of the present disclosure.

Claims

1. A rolling contact bogie axle end grounding device structure, comprising a wheel axle (20) and a wheel axle end cover (9), wherein one end of the wheel axle end cover (9) is connected to the wheel axle (20), characterized in that: A grounding structure is provided at the other end of the wheel axle end cover (9), and the grounding structure comprises a concave body (1) and a movable body (2). The concave body (1) is fixed on the wheel axle end cover (9), and the concave body (1) and the movable body (2) are in rolling contact with each other. A grounding wire group (4) is provided on the movable body (2); a roller groove is provided on the movable body (2), a roller (21) is installed in the roller groove, and a roller compression spring (22) is provided between the roller (21) and the roller groove; It also includes a fixed bracket (5) and a grounding end cover (8), the movable body (2) is movably connected to the fixed bracket (5), a spring (6) is provided between the movable body (2) and the grounding end cover (8), one end of the spring (6) is mounted on the movable body (2), and the other end is mounted on the adjustment block (7), and the adjustment block (7) is movably connected to the grounding end cover (8); The roller (21) is a conical body, the small diameter end of the roller (21) is close to the center of the movable body (2), the roller groove and the large diameter end of the roller (21) are correspondingly provided with a circular groove (212), the roller groove and the small diameter end of the roller (21) are correspondingly provided with a clamping groove (211), the small diameter of the roller (21) is clamped in the clamping groove (211), a ball (23) is provided in the circular groove (212), and the ball (23) and the large diameter end of the roller (21) form a top ball structure.

2. The rolling contact bogie axle end grounding device structure according to claim 1, characterized in that: A circular groove (101) is formed at the center of the concave body (1); a plurality of limiting grooves (201) are provided on the edge of the movable body (2); limiting bosses (501) are provided on the fixed bracket (5) in correspondence with the limiting grooves (201); the movable body (2) contacts the limiting bosses (501) on the fixed bracket (5) through the limiting grooves (201), thereby limiting the axial movement of the movable body (2).

3. The rolling contact bogie axle end grounding device structure according to claim 1, characterized in that: A connecting rod (3) is provided between the movable body (2) and the grounding end cover (8), and the spring (6) is sleeved on the connecting rod (3).

4. The rolling contact bogie axle end grounding device structure according to claim 3, characterized in that: An adjusting boss (801) is provided on the grounding end cover (8), and the grounding end cover (8), the adjusting boss (801), and the adjusting boss (801) are connected to the adjusting block 7 via an adjusting bolt (10). The grounding end cover (8) and the adjusting block (7) are both provided with holes for passing the connecting rod (3).

5. The rolling contact bogie axle end grounding device structure according to claim 4, characterized in that: The movable body (2) has a plurality of binding posts evenly distributed on a plane on one side of the connecting rod (3); one end of the grounding wire group (4) is connected to the binding posts, and the other end is fixed to the fixed bracket (5).

6. The rolling contact bogie axle end grounding device structure according to claim 5, characterized in that: The adjustment block (7) is triangular in shape, consistent with the shape of the adjustment boss (801), and the adjustment block (7) is sealed with the grounding end cover (8) and the connecting shaft of the movable body (2) via a sealing ring.

7. A rolling contact bogie axle end grounding device structure according to claim 6, characterized in that: The movable body (2) and the spring (6) are correspondingly arranged in the movable body spring groove, the adjustment block (7) and the spring (6) are correspondingly arranged in the adjustment block spring groove, one end of the spring (6) is clamped in the movable body spring groove, and the other end is clamped in the adjustment block spring groove; a sealing cover (11) is provided on the outside of the adjustment boss (801) for blocking external dust and water.

8. A method for installing a rolling contact bogie axle end grounding device structure, characterized in that: The specific steps include: (1) The movable body (2), the roller (21) and the roller compression spring (22) are pre-assembled into a whole and then mounted on the frame by bolts; (2) The fixing bracket (5) is welded together with the flange and the casting, and a hole is opened in the flange; (3) Cut edge notches, a center hole, and a spring slot on the movable body (2), weld the connecting rod (3), weld the grounding wire group (4), and fix the selected spring (6) in the spring slot; (4) Place the assembled movable body (2) inside the fixed bracket (5), and fix the upper grounding wire assembly to the opening of the fixed bracket (5) by bolts; (5) Pre-install the adjustment block (7) onto the grounding end cover (8); (6) Install the grounding end cover (8) onto the fixed bracket (5), and set a sealing ring at the contact point between the grounding end cover (8) and the fixed bracket (5). Insert the end of the connecting rod (3) into the square hole of the adjustment block (7) and the grounding end cover (8); and place one end of the spring (6) into the spring slot of the adjustment block (7); (7) The preassembled parts are fixed on the bogie frame (12); the preload force of the spring (6) is adjusted to be appropriate by the adjusting bolt (10) on the ground end cover (8); and the sealing cover (11) is covered.

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