Hub bearing with inner ring stop mechanism

Abstract

The utility model discloses a hub bearing with an inner ring stop mechanism, which comprises a mounting flange, a bearing, a hub flange and a hub shaft, the hub flange is fixedly connected with the hub shaft, a mounting hole is arranged on the mounting flange, an outer ring of the bearing is fixedly connected in the mounting hole, a plurality of groups of spline grooves are arranged on an inner ring of the bearing, and the inner ring of the bearing is fixedly connected with the inner ring of the bearing. Spline strips matched with the spline grooves are fixedly connected to the end of the hub shaft, the spline strips are embedded into the spline grooves in a one-to-one correspondence mode, a limiting disc is fixedly connected to the hub shaft, the limiting disc abuts against the inner ring of the bearing, a threaded part is arranged at the position, located at the outer ends of the spline strips, of the hub shaft, and a sealing cap is in threaded connection to the threaded part; the end face of the sealing cap abuts against the inner ring of the bearing. The utility model relates to the technical field of hub bearings, and has the characteristics of stable movement and convenience in replacement.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub bearing technology, specifically a wheel hub bearing with an inner ring retaining mechanism. Background Technology

[0002] Wheel hub bearings are core components of the transmission systems of vehicles such as automobiles and construction machinery. Their main function is to support the wheel hub and ensure the smooth rotation of the wheel. With the trend of vehicle lightweighting and high performance, wheel hub bearings not only need to withstand radial and axial loads, but also need to have good motion stability, durability, and ease of maintenance. However, existing wheel hub bearings still have some technical problems in their structural design, affecting their performance and ease of maintenance.

[0003] First, the inner ring of the bearing is fixed to the hub shaft by press fitting, relying on the interference fit to provide the tightening force. However, after long-term exposure to alternating loads, the interference fit may loosen, causing fretting wear between the inner ring of the bearing and the shaft, which in turn affects the transmission accuracy and may even cause abnormal noise or vibration.

[0004] Secondly, the axial clearance of a bearing (i.e., the axial displacement between the inner and outer rings) directly affects its operational stability. If the clearance is too large, the bearing will move under axial force, accelerating wear; if the clearance is too small, the bearing may seize due to thermal expansion. Traditional wheel hub bearings usually use a single limiting structure (such as a snap ring or end cap), which makes it difficult to dynamically adjust the preload. After long-term use, the clearance is prone to increase due to wear, affecting the bearing's lifespan.

[0005] Furthermore, since wheel hub bearings are usually fixed with interference fits or high-strength bolts, disassembly often requires hydraulic pullers, heating or impact tools, which is cumbersome and can easily damage the mating surfaces. Utility Model Content

[0006] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a wheel hub bearing that is stable in motion and easy to replace.

[0007] The technical solution adopted by this utility model to achieve the above objectives is as follows: a hub bearing with an inner ring stop mechanism, including a mounting flange, a bearing, a hub flange, and a hub shaft. The hub flange is fixedly connected to the hub shaft. The mounting flange has a mounting hole. The outer ring of the bearing is fixedly connected to the mounting hole. The hub shaft has a shaft hole. The inner ring of the bearing has multiple sets of spline grooves. The end of the hub shaft is fixedly connected to a spline strip in each set of spline grooves. The spline strips are fitted into the spline grooves one by one, and the outer surface of the spline strips abuts against the inner wall of the spline groove.

[0008] A limiting disc is fixedly connected to the hub shaft. The limiting disc is fixedly connected to the inner end of the spline bar. The limiting disc abuts against the inner ring of the bearing. The outer end of the spline bar is flush with the port of the spline groove.

[0009] The hub shaft has a threaded portion at the outer end of the spline bar, and a sealing cap is threaded onto the threaded portion. The end face of the sealing cap abuts against the inner ring of the bearing, and the sealing cap has a through hole that mates with the shaft hole.

[0010] In the above technical solution, friction stripes are provided on the outer surface of the sealing cap.

[0011] In the above technical solution, a wear-resistant layer A is fixedly connected to the outer surface of the limiting disk, and the wear-resistant layer A abuts against the inner ring of the bearing;

[0012] A wear-resistant layer B is fixedly connected to the inner end face of the sealing cap, and the wear-resistant layer B abuts against the inner ring of the bearing.

[0013] In the above technical solution, both wear-resistant layer A and wear-resistant layer B are made of polyetheretherketone friction layer.

[0014] In the above technical solution, an adhesive layer is provided between the sealing cap and the threaded portion.

[0015] In the above technical solution, the adhesive layer is made of threadlocker.

[0016] The beneficial effects of this utility model are:

[0017] 1. The spline bar and spline groove form a radial rigid connection. Combined with the bidirectional clamping structure of the limiting plate and the sealing cap, an axial preload is applied to both sides of the bearing inner ring, which can compress the axial clearance of the bearing inner ring and ensure smooth bearing movement.

[0018] 2. After heating the sealing cap to soften the adhesive layer, the sealing cap can be removed by rotating it. Then the hub shaft can be removed from the bearing. After replacing the bearing, it can be reassembled. The operation is simple and the replacement and maintenance are convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0021] Figure 3 This is an exploded structural diagram of the present invention;

[0022] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0023] In the diagram: 100 mounting flange, 101 mounting hole, 200 bearing, 201 spline groove, 300 hub flange, 400 hub shaft, 401 spline strip, 402 limit plate, 403 threaded part, 500 sealing cap, 501 through hole. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Please see Figure 1-4 A hub bearing with an inner ring stop mechanism includes a mounting flange 100, a bearing 200, a hub flange 300, and a hub shaft 400. The hub flange 300 is fixedly connected to the hub shaft 400 and is used to be mounted on a car wheel hub. The mounting flange 100 is used to be fixedly mounted on the suspension. The mounting flange 100 has a mounting hole 101. The outer ring of the bearing 200 is fixedly connected to the mounting hole 101 by an interference fit. The hub shaft 400 also has a shaft hole for connecting to the wheel shaft.

[0026] Furthermore, the inner ring of the bearing 200 is provided with multiple sets of spline grooves 201, and the end of the hub shaft 400 is fixedly connected with a spline bar 401 to each set of spline grooves 201. The spline bars 401 are fitted into the spline grooves 201 one by one, and the outer surface of the spline bar 401 abuts against the inner wall of the spline groove 201.

[0027] In addition, a limiting disk 402 is fixedly connected to the hub shaft 400. The limiting disk 402 is fixedly connected to the inner end of the spline 401. The limiting disk 402 abuts against the inner ring of the bearing 200. The outer end of the spline 401 is flush with the port of the spline groove 201. Furthermore, a threaded part 403 is provided on the hub shaft at the outer end of the spline 401. A sealing cap 500 is threadedly connected to the threaded part 403. The end face of the sealing cap 500 abuts against the inner ring of the bearing 200. The sealing cap 500 is provided with a through hole 501 that matches the shaft hole. In this way, a radial rigid connection is formed by the cooperation between the spline 401 and the spline groove 201. With the bidirectional clamping structure of the limiting disk 402 and the sealing cap 500, an axial preload is applied to both sides of the inner ring of the bearing 200. This can compress the axial clearance of the inner ring of the bearing 200 and ensure the smooth movement of the bearing 200.

[0028] The closure cap 500 can be removed by rotating it, and then the hub shaft 400 can be removed from the bearing 200. After replacing the bearing 200, it can be reassembled. The operation is simple and the replacement and maintenance are convenient. Furthermore, the outer surface of the closure cap 500 is provided with friction stripes to facilitate the rotation of the closure cap 500.

[0029] Furthermore, a wear-resistant layer A is fixedly connected to the outer surface of the limiting plate 402, and the wear-resistant layer A abuts against the inner ring of the bearing 200. A wear-resistant layer B is fixedly connected to the inner end face of the sealing cap 500, and the wear-resistant layer B abuts against the inner ring of the bearing 200. Both the wear-resistant layer A and the wear-resistant layer B are made of polyetheretherketone friction layer. In this way, the inner ring end face of the bearing 200 can be protected during continuous contact friction, and the wear rate can be reduced. Moreover, the high temperature resistance and chemical corrosion resistance of this material are particularly suitable for harsh working conditions.

[0030] Furthermore, an adhesive layer is provided between the sealing cap 500 and the threaded part 403. The adhesive layer is made of thread-locking adhesive. The threaded part 403 works with the adhesive layer to achieve permanent anti-loosening. When disassembling the sealing cap 500, it is only necessary to heat it to soften the thread-locking adhesive.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hub bearing with inner ring stop mechanism, comprising a mounting flange (100), a bearing (200), a hub flange (300) and a hub shaft (400), the hub flange (300) is fixedly connected with the hub shaft (400), the mounting flange (100) is provided with a mounting hole (101), the outer ring of the bearing (200) is fixedly connected in the mounting hole (101), the hub shaft (400) is provided with a shaft hole, characterized in that: The inner ring of the bearing (200) is provided with a plurality of groups of spline grooves (201), the end of the hub shaft (400) is fixedly connected with a spline strip (401) matching each group of the spline grooves (201), the spline strip (401) is correspondingly embedded into the spline groove (201), and the outer surface of the spline strip (401) is in contact with the inner wall of the spline groove (201); ​ The hub shaft (400) is fixedly connected with a limiting disc (402), the limiting disc (402) is fixedly connected with the inner end of the spline strip (401), the limiting disc (402) is in contact with the inner ring of the bearing (200), and the outer end of the spline strip (401) is flush with the port of the spline groove (201); The outer end of the spline strip (401) is provided with a threaded portion (403) on the hub shaft (400), the threaded portion (403) is threadedly connected with a closing cap (500), the end face of the closing cap (500) is in contact with the inner ring of the bearing (200), and the closing cap (500) is provided with a perforation (501) matching the shaft hole.

2. A hub bearing with an inner ring stop mechanism according to claim 1, characterized in that: The outer surface of the closing cap (500) is provided with a friction stripe.

3. A hub bearing with an inner ring stop mechanism according to claim 1, characterized in that: The outer side of the limiting disc (402) is fixedly connected with a wear-resistant layer A, and the wear-resistant layer A is in contact with the inner ring of the bearing (200); The inner end face of the closing cap (500) is fixedly connected with a wear-resistant layer B, and the wear-resistant layer B is in contact with the inner ring of the bearing (200).

4. A hub bearing with an inner ring stop mechanism according to claim 3, characterized in that: The wear-resistant layer A and the wear-resistant layer B are both polyether ether ketone friction layers.

5. A hub bearing with an inner ring stop mechanism according to claim 1, characterized in that: The closing cap (500) and the threaded portion (403) are provided with a bonding layer.

6. A hub bearing with an inner ring stop mechanism according to claim 5, characterized in that: The bonding layer is a threaded adhesive.

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