Light-weight high-wear-resistance wheel hub bearing unit for vehicle

Abstract

The utility model relates to the technical field of wheel hub bearing units, in particular to a light-weight high-wear-resistance wheel hub bearing unit for a vehicle, which comprises a bearing outer ring and a bearing inner ring, a protection frame and two sealing rings are rotatably mounted between the bearing outer ring and the bearing inner ring, an oil injection hole is formed in the bearing outer ring, and the oil injection hole is communicated with the bearing inner ring. A fixing block is fixedly mounted in the oil injection hole, and a hollow pipe is rotationally connected to the fixing block; and sealing open grooves are formed in the inner walls of the two sides of the oil injection hole correspondingly, a sliding plate is slidably connected into each sealing open groove, and rubber pads are fixedly connected to the surfaces of one sides of the two sliding plates correspondingly. According to the hub bearing unit, one end of the oil filling pipe is inserted into the hollow pipe, the other end of the oil filling pipe is inserted between the two sliding plates, lubricating oil is filled, the sealing cover does not need to be taken out, the phenomenon that the sealing cover is lost is avoided, the phenomenon of thread slipping is avoided, and use of the hub bearing unit is facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of wheel hub bearing units, and in particular to a lightweight, high-wear-resistant automotive wheel hub bearing unit. Background Technology

[0002] With the continuous development of society and the continuous progress of technology, the technology related to wheel hub bearing units is also constantly improving. The wheel hub bearing units used in lightweight and high wear-resistant vehicles generally include an inner ring and an outer ring, with a single row or double row of rollers fixed between the inner and outer rings by a cage.

[0003] The patent document with publication number "CN221547571U" discloses an automotive wheel hub bearing unit, which relates to the technical field of automotive parts, including an outer bearing ring, an inner bearing ring, a protective frame rotatably connected between the outer bearing ring and the inner bearing ring, and two sealing rings.

[0004] Although the aforementioned patent documents have solved the problems of long lubricating oil injection time and low lubricating oil injection efficiency, the following drawbacks still exist: before adding lubricating oil each time, the threaded rod needs to be rotated to disengage it from the oil injection hole before lubricating oil can be injected. After the threaded rod is rotated multiple times, it is easy for the thread to slip, and the threaded rod is easy to be lost after it is disengaged from the oil injection hole, which is not conducive to the use of the wheel hub bearing unit. Utility Model Content

[0005] The purpose of this utility model is to solve the following shortcomings in the prior art: before adding lubricating oil, the threaded rod needs to be rotated to disengage it from the oil injection hole before lubricating oil can be injected. After the threaded rod is rotated many times, it is easy for the thread to slip. Moreover, the threaded rod is easy to be lost after it is disengaged from the oil injection hole, which is not conducive to the use of the wheel hub bearing unit. Therefore, a lightweight and highly wear-resistant automotive wheel hub bearing unit is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A lightweight, high-wear-resistant automotive wheel hub bearing unit includes an outer bearing ring and an inner bearing ring. A protective frame and two sealing rings are rotatably installed between the outer bearing ring and the inner bearing ring. An oil injection hole is provided on the outer bearing ring, and a fixing block is fixedly installed in the oil injection hole. A hollow tube is rotatably connected to the fixing block.

[0008] The inner walls on both sides of the oil injection hole are provided with sealing grooves, and a sliding plate is slidably connected in each sealing groove. A rubber pad is fixedly connected to one side surface of each of the two sliding plates. A rotating assembly is provided on the hollow tube. The rotating assembly includes two rotating pieces fixedly installed at one end of the hollow tube. A moving strip is rotatably provided on each rotating piece. A limiting groove for connecting the corresponding moving strip is provided on each sliding plate. A sliding assembly is provided on the hollow tube.

[0009] Preferably, the sliding assembly includes a circular plate fixedly mounted on the hollow tube, a support rod connected to the circular plate via a first spring, and a sealing cap fixedly connected to the support rod.

[0010] Preferably, two rubber blocks are fixedly connected to the circular plate, and the two rubber blocks are respectively disposed on both sides of the support rod.

[0011] Preferably, a torsion spring is fitted onto the hollow tube, one end of the torsion spring is fixedly connected to the hollow tube, and the other end of the torsion spring is fixedly connected to the fixing block.

[0012] Preferably, a sealing ring is fixedly connected to the hollow tube, and the surface of the sealing ring is in contact with the surface of the fixing block.

[0013] Preferably, the lower surface of the sealing cap is made of rubber, and the lower surface of the sealing cap is in contact with the end face of the hollow tube.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] When the hollow tube is rotated, the two rotating plates will slide within the two limiting grooves, causing the two rubber pads to separate and increasing the distance between the two sliding plates. Then, the support rod is pulled, and the sealing cover moves and is offset from the end face of the hollow tube. Finally, one end of the oil injection pipe can be inserted into the hollow tube and between the two sliding plates to inject lubricating oil. The sealing cover does not need to be removed, thus preventing the sealing cover from being lost or the threads from stripping, which is beneficial for the use of the wheel hub bearing unit. Attached Figure Description

[0016] Figure 1 This is a front structural diagram of a lightweight, high-wear-resistant automotive wheel hub bearing unit proposed in this utility model;

[0017] Figure 2 This is a side internal structure diagram of a lightweight, high wear-resistant automotive wheel hub bearing unit proposed in this utility model;

[0018] Figure 3This is a partial structural diagram of the fixing block and hollow tube in this utility model from a bottom view;

[0019] Figure 4 This is a top view of the circular plate and sealing cap of this utility model.

[0020] Figure 5 for Figure 2 A magnified view of part A in the image.

[0021] In the diagram: 1. Bearing outer ring, 2. Bearing inner ring, 3. Sealing ring, 4. Fixing block, 5. Rotating plate, 6. Oil injection hole, 7. Limiting groove, 8. Protective frame, 9. Moving bar, 10. Slide plate, 11. Sealing ring, 12. Hollow tube, 13. Round plate, 14. Support rod, 15. Sealing cover, 16. Rubber pad, 17. Torsion spring, 18. Rubber block, 19. First spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] The terms used in this utility model, such as "upper", "lower", "left", "right", "middle" and "one", are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0024] Reference Figures 1-5 A lightweight, high-wear-resistant automotive wheel hub bearing unit includes an outer bearing ring 1 and an inner bearing ring 2. A protective frame 8 and two sealing rings 3 are rotatably installed between the outer bearing ring 1 and the inner bearing ring 2. An oil injection hole 6 is provided on the outer bearing ring 1. A fixing block 4 is fixedly installed in the oil injection hole 6. A hollow tube 12 is rotatably connected to the fixing block 4. Sealing grooves are provided on both sides of the inner wall of the oil injection hole 6. A sliding plate 10 is slidably connected in each sealing groove. A rubber pad 16 is fixedly connected to one side surface of each of the two sliding plates 10. A rotating assembly is provided on the hollow tube 12. The rotating assembly includes two rotating pieces 5 fixedly installed at one end of the hollow tube 12. A moving strip 9 is rotatably provided on each rotating piece 5. A limiting groove 7 for connecting the corresponding moving strip 9 is provided on each sliding plate 10. A sliding component is provided on the hollow tube 12.

[0025] The sliding assembly includes a circular plate 13 fixedly mounted on a hollow tube 12. A support rod 14 is connected to the circular plate 13 via a first spring 19. A sealing cover 15 is fixedly connected to the support rod 14. Pulling the support rod 14 causes it to slide relative to the circular plate 13. Since the two ends of the first spring 19 are fixedly connected to the support rod 14 and the circular plate 13 respectively, the first spring 19 deforms. After the sealing cover 15 moves, it will be misaligned with the end face of the hollow tube 12. Two rubber blocks 18 are fixedly connected to the circular plate 13. The two rubber blocks 18 are respectively set on both sides of the support rod 14. Pulling the support rod 14 causes it to slide relative to the circular plate 13 and misaligns the sealing cover 15 with the hollow tube 12. The two side surfaces of the support rod 14 will be in close contact with the surfaces of the two rubber blocks 18. Under the clamping action of the two rubber blocks 18, the support rod 14 can be effectively prevented from moving arbitrarily.

[0026] A torsion spring 17 is fitted onto the hollow tube 12. One end of the torsion spring 17 is fixedly connected to the hollow tube 12, and the other end is fixedly connected to the fixing block 4. Under the elastic force of the torsion spring 17, the hollow tube 12 can be effectively prevented from rotating arbitrarily. When the hollow tube 12 rotates relative to the fixing block 4, the torsion spring 17 deforms. A sealing ring 11 is fixedly connected to the hollow tube 12. The surface of the sealing ring 11 is in contact with the surface of the fixing block 4. The rubber sealing ring 11 can effectively improve the sealing performance when the hollow tube 12 is connected to the fixing block 4. The lower surface of the sealing cover 15 is made of rubber. The lower surface of the sealing cover 15 is in contact with the end face of the hollow tube 12. In the initial state, the rubber surface of the sealing cover 15 is in close contact with the end face of the hollow tube 12, thereby sealing and blocking the end of the hollow tube 12 away from the rotating piece 5.

[0027] In this invention, initially, the torsion spring 17 does not deform, and the rubber pads 16 on one side of the two sliding plates 10 are tightly pressed together, sealing the oil injection hole 6. When lubricating oil needs to be injected, the hollow tube 12 is rotated first. During the relative rotation of the hollow tube 12 and the fixed block 4, the torsion spring 17 deforms. During the rotation of the two rotating plates 5, the two moving strips 9 slide in the two limiting grooves 7 respectively, thereby driving the two sliding plates 10 to slide in the two sealing grooves respectively. The sealing performance when the sliding plates 10 are connected to the sealing grooves is good. After the two sliding plates 10 move, the two rubber pads 16 will separate, and the distance between the two sliding plates 10 will increase. Then, the support rod is pulled. 14. This allows the spring 19 to slide relative to the circular plate 13. Since the two ends of the first spring 19 are fixedly connected to the support rod 14 and the circular plate 13 respectively, the first spring 19 deforms. In the initial state, the rubber surface of the sealing cover 15 is in close contact with the end face of the hollow tube 12, thereby sealing and blocking one end of the hollow tube 12. After the sealing cover 15 moves, it will be misaligned with the end face of the hollow tube 12. Finally, one end of the oil injection pipe (not shown) can be inserted into the hollow tube 12, and the oil injection pipe can be inserted between the two slide plates 10 to inject lubricating oil. It is not necessary to remove the sealing cover 15, so there will be no loss of the sealing cover 15 or stripping of the threads, which is beneficial to the use of the wheel hub bearing unit.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lightweight, high-wear-resistant automotive wheel hub bearing unit, comprising an outer bearing ring (1) and an inner bearing ring (2), wherein a protective frame (8) and two sealing rings (3) are rotatably mounted between the outer bearing ring (1) and the inner bearing ring (2), characterized in that, The bearing outer ring (1) is provided with an oil injection hole (6), and a fixing block (4) is fixedly installed in the oil injection hole (6). A hollow tube (12) is rotatably connected to the fixing block (4). The inner walls of both sides of the oil injection hole (6) are provided with sealing grooves, and a sliding plate (10) is slidably connected in each sealing groove. A rubber pad (16) is fixedly connected to one side surface of each of the two sliding plates (10). A rotating assembly is provided on the hollow tube (12). The rotating assembly includes two rotating pieces (5) fixedly installed at one end of the hollow tube (12). A moving strip (9) is rotatably provided on each rotating piece (5). A limiting groove (7) for connecting the corresponding moving strip (9) is provided on each sliding plate (10). A sliding assembly is provided on the hollow tube (12).

2. The lightweight, high-wear-resistant automotive wheel hub bearing unit according to claim 1, characterized in that... The sliding assembly includes a circular plate (13) fixedly mounted on the hollow tube (12), a support rod (14) connected to the circular plate (13) by a first spring (19), and a sealing cap (15) fixedly connected to the support rod (14).

3. The lightweight, high-wear-resistant automotive wheel hub bearing unit according to claim 2, characterized in that, Two rubber blocks (18) are fixedly connected to the circular plate (13), and the two rubber blocks (18) are respectively arranged on both sides of the support rod (14).

4. The lightweight, high-wear-resistant automotive wheel hub bearing unit according to claim 1, characterized in that, A torsion spring (17) is fitted on the hollow tube (12). One end of the torsion spring (17) is fixedly connected to the hollow tube (12), and the other end of the torsion spring (17) is fixedly connected to the fixing block (4).

5. A lightweight, high-wear-resistant automotive wheel hub bearing unit according to claim 1, characterized in that, A sealing ring (11) is fixedly connected to the hollow tube (12), and the surface of the sealing ring (11) is in contact with the surface of the fixing block (4).

6. A lightweight, high-wear-resistant automotive wheel hub bearing unit according to claim 2, characterized in that, The lower surface of the sealing cap (15) is made of rubber, and the lower surface of the sealing cap (15) is in contact with the end face of the hollow tube (12).

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