Bearing anti-runout structure, bearing and wave spring

Abstract

The application belongs to the field of bearings, and particularly relates to a bearing anti-runout structure, a bearing and a wave spring, which comprises a bearing seat, a bearing and a rotating shaft connected in sequence, and further comprises a stop pad, the stop pad is provided with a stop block or a stop groove on both sides along the bearing axis, one side of the stop pad is arranged in close contact with one side of the bearing, the bearing and the stop pad are provided with a matching groove I or a matching block I matched with the stop block or the stop groove on the side, and the hole shoulder of the bearing seat or the shaft shoulder of the rotating shaft is provided with a matching groove II or a matching block II matched with the other stop block or the stop groove, the application realizes circumferential locking of the bearing and the bearing seat or the bearing and the rotating shaft, effectively prevents the occurrence of bearing runout, and further has the function of automatic alignment and installation in the installation process, improves the reliability, NVH performance and service life of the product, reduces the number of parts, reduces the product manufacturing cost, and improves the manufacturing efficiency of the product.

Description

Technical Field

[0001] This invention belongs to the field of bearings, specifically relating to a bearing anti-runaway structure, a bearing, and a wave spring. Background Technology

[0002] In practical applications, rotating bearings can experience relative slippage between the outer ring and the bearing housing bore, and between the inner ring and the shaft, due to design, load, and environmental factors. This can lead to wear on the bearing, bearing housing bore, bearing preload spring, or shaft, causing noise, abnormal vibration, and, in severe cases, bearing burnout, resulting in serious safety accidents and significant economic losses. Therefore, preventing bearing slippage is a critical technical challenge that needs to be addressed in all bearing application industries.

[0003] In addition, traditional aluminum alloy bearing housings typically use steel inserts to enhance the bearing housing's hardness and strength, thus mitigating the impact of bearing race slippage. Some designers also incorporate O-rings within the bearing housing bore to further alleviate this issue. However, these solutions cannot completely solve the bearing race slippage problem, and such designs suffer from low production efficiency and high manufacturing costs during mass production.

[0004] Chinese patent "CN114039445A - A motor bearing and bearing fixing structure for preventing bearing slippage" proposes a structure to prevent bearing slippage, but it still has problems such as inconvenient installation and large area occupied by the anti-slippage structure, making it difficult to meet the compact requirements of electric vehicle powertrain. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a bearing anti-running ring structure and wave spring with automatic alignment and installation effect.

[0006] The present invention includes a bearing housing, a bearing, and a rotating shaft connected in sequence, and also includes a stop pad. The stop pad is provided with a stop block or a stop groove on both sides of the bearing axis. One side of the stop pad is fitted to the side of the bearing. The bearing and the stop pad mating side are provided with a mating groove I or a mating block I that fits into the stop block or the stop groove. The shoulder of the bearing housing or the shoulder of the rotating shaft is provided with a mating groove II or a mating block II that mates with another stop block or stop groove.

[0007] Furthermore, the stop block includes a block body, and the stop block is disposed on the block body along the axial direction.

[0008] Furthermore, the pad body is a wave spring.

[0009] Furthermore, the wave spring is a wave spring sheet arranged in a ring shape, with two stop blocks located at both ends of the spring sheet.

[0010] Furthermore, the stop block is formed by bending the end of a spring.

[0011] Furthermore, the bent portion of the reed has an arc-shaped transition.

[0012] Furthermore, the pad body has an arc-shaped structure, and stop blocks are provided at both ends of the pad body.

[0013] Furthermore, the stop pad is disposed between the shoulder of the bearing housing and the outer ring of the bearing, the mating groove II or mating block II is disposed on the shoulder of the bearing housing, the stop pad is disposed between the shoulder of the rotating shaft and the inner ring of the bearing, and the mating groove II or mating block II is disposed on the shoulder of the rotating shaft.

[0014] The present invention also provides a bearing, wherein the inner ring and / or outer ring side surfaces are provided with a mating groove I or a mating block I.

[0015] The present invention also provides a wave spring, wherein the wave spring is a wave spring sheet arranged in a ring, and the two ends of the wave spring sheet are respectively provided with stop edges facing both sides.

[0016] The beneficial effects of this invention are as follows: By setting a stop pad and utilizing the stop blocks on both sides of the stop pad along the axial direction, when the mating groove II is set on the bearing housing, it combines with the mating groove I on the bearing outer ring and the mating groove II on the bearing housing to ensure that the stop pad, the bearing outer ring, and the bearing housing remain relatively fixed, achieving circumferential locking between the bearing and the bearing housing. When the mating groove II is set on the rotating shaft, it combines with the mating groove I on the bearing inner ring and the mating groove II on the rotating shaft to ensure that the stop pad, the bearing inner ring, and the rotating shaft remain relatively fixed, achieving circumferential locking between the bearing and the rotating shaft, effectively preventing bearing runaway. During installation, the stop blocks do not need to be aligned with the mating grooves I and II, because if the bearing runs away, the mating groove I on the bearing outer ring will rotate to the position of the stop block and engage with it. If runaway occurs again, it will drive the stop pad to rotate, and the other stop block will move to the mating groove II and engage with it, locking the bearing outer ring again, thus solving the runaway problem. Overall, the present invention features a simple and reliable structure, convenient and quick installation, and can directly eliminate the use of steel bushings and O-rings, improving the manufacturability and production efficiency of the bearing housing while reducing manufacturing costs. Compared with the traditional use of steel bushings and O-rings, the structure and installation method provide better anti-running performance, and both the manufacturability and production efficiency of the bearing housing are improved. Furthermore, while improving product reliability and service life, it reduces the number of parts, improves the manufacturability of the bearing housing components and mass production efficiency, and reduces the design and manufacturing costs of related products. In addition, regarding space occupation, compared with conventional bearing installations without anti-running structures, the only additional space required is the thickness of the retaining pad. Attached Figure Description

[0017] Figure 1 This is an exploded view of the present invention.

[0018] Figure 2 This is a schematic diagram of the bearing housing structure in this invention.

[0019] Figure 3 This is a schematic diagram of the structure of the first embodiment of the stop pad block of the present invention.

[0020] Figure 4 This is a front view of a second embodiment of the stop pad block in this invention.

[0021] Figure 5 This is a schematic diagram of the structure of a second embodiment of the stop pad block in this invention.

[0022] Figure 6 This is a schematic diagram of the third embodiment of the stop pad block in the present invention.

[0023] Figure 7 This is a schematic diagram of the fourth embodiment of the stop pad block in the present invention.

[0024] Figure 8 This is a schematic diagram of the installation structure of the stop pad and bearing seat in this invention.

[0025] Figure 9 This is a schematic diagram of the bearing structure in this invention.

[0026] Figure 10 This is a schematic diagram of the structure of the present invention.

[0027] Figure 11 for Figure 10 Partial sectional view.

[0028] Figure 12 This is an exploded view of Embodiment 2 of the present invention.

[0029] In the figure, 1-bearing housing; 2-bearing; 21-outer ring; 22-inner ring; 3-shaft; 4-stop pad; 41-stop block; 42-pad body; 5-groove I; 6-groove II. Detailed Implementation

[0030] Example 1

[0031] like Figure 1-11As shown, the present invention includes a bearing housing 1, a bearing 2, and a rotating shaft 3 connected in sequence, and also includes a stop pad 4. The stop pad 4 has stop blocks 41 on both sides along the bearing axis. One side of the stop pad 4 is fitted to the side of the bearing 2. The bearing 2 and the stop pad 4 have a mating groove I5 that fits into the stop block 41. The bearing housing 1 has a mating groove II6 on the shoulder of the hole that mates with another stop block 41.

[0032] In this embodiment, to prevent the outer ring 21 of the bearing from running off, based on the premise that the inner ring 22 of the bearing and the shaft 3 have an interference fit, and the outer ring 21 of the bearing and the hole of the bearing housing 1 have a clearance or transition fit, the stop block 4 is set between the shoulder of the hole of the bearing housing 1 and the outer ring of the bearing 2. The mating groove I5 is set on the outer ring 21 of the bearing, and the mating groove II6 is set on the shoulder of the hole of the bearing housing 1. In this embodiment, by setting the stop block 4 between the two, and using the stop blocks 41 set on both sides of the stop block 4 along the axial direction, combined with the mating groove I5 of the outer ring of the bearing 2 and the mating groove II6 on the shoulder of the hole of the bearing housing 1, the stop block 4, the outer ring 21 of the bearing, and the bearing housing 1 are ensured to move smoothly together. By maintaining relative fixation, the bearing 2 and bearing housing 1 are circumferentially locked, effectively preventing bearing race slippage. During installation, the stop block 41 does not need to be aligned with the mating groove I5 and mating groove II6. As long as bearing 2 slips, the mating groove I5 on the outer ring 21 of the bearing will rotate to the position of the stop block 41 and engage with it. If slippage occurs again, it will drive the stop pad 4 to rotate, and the other stop block 41 will move to the mating groove II6 and engage with it, locking the outer ring of the bearing again. The problem of bearing race slippage is then solved, avoiding the wear, vibration noise, and product life problems caused by bearing race slippage. Overall, the structure of this invention is simple and reliable, and the installation is convenient and quick.

[0033] Compared to the traditional use of steel bushings and O-rings, the structure and installation method of the bearing housing provide better anti-running performance. This improves product reliability, NVH performance, and service life while reducing the number of parts, lowering manufacturing costs, and increasing manufacturing efficiency. Specifically, the manufacturability and production efficiency of the bearing housing are improved, and manufacturing costs are reduced. This not only enhances product reliability and service life but also reduces the number of parts, improves the manufacturability of the bearing housing and mass production efficiency, and lowers the design and manufacturing costs of related products.

[0034] Furthermore, the stop block 41, mating groove I, and mating groove II 6 of the present invention are arranged along the axial direction. Compared to conventional bearing installations without an anti-runaway structure, the space occupied is only slightly increased by the thickness of the stop block 4's body 42. Moreover, the arrangement of the body 42 is a relatively conventional method during bearing installation. Therefore, the anti-runaway structure of the present invention occupies negligible space, especially in the field of automotive motor bearings where compactness requirements are increasingly stringent, and the present invention can better meet these requirements. In contrast, for example, in "CN114039445A - An Anti-Runaway Motor Bearing and Bearing Fixing Structure," the positioning groove and boss are arranged along the radial direction of the bearing, resulting in a significant difference in both space occupation and installation convenience compared to this application.

[0035] The stop pad 4 includes a pad body 42, and a stop block 41 is disposed on the pad body 42 along the axial direction. The structure of the pad body 42 is preferably a wave spring, which not only serves as a wave washer but also further consolidates the anti-runaway effect.

[0036] like Figure 3 As shown, the wave spring is a wave spring sheet arranged in a ring, with two stop blocks 41 set at both ends of the spring sheet. This reduces the complexity of the structure and simplifies the production cost, without affecting the anti-runaway effect. In addition, the stop block 41 is formed by bending the end of the spring sheet, and the bent part of the spring sheet has an arc transition, which further reduces the production cost. At the same time, it is easy for the stop block 41 to engage with the mating groove I5 and the mating groove II6, reducing the installation difficulty and improving the success rate of the automatic fitting process. In addition, with this setting, the stop pad 4 has no front or back distinction. After rotating 180°, the structure is the same, which further reduces the installation process. At the same time, in this embodiment, a mating groove I5 can also be set on each side of the outer ring 21 of the bearing, so that the bearing 2 can be installed on both sides without distinguishing the front and back of the bearing.

[0037] The cross-sections of the stop block 41 and the pad body 42 can be... Figure 3 The flat, sheet-like shape shown can also be as... Figures 4-5 In addition to the circular cross-section, the pad body 42 can also be a wavy structure. In this case, the pad body 42 can be pre-tightened during installation to give the bearing axial pre-tightening force, improve rotational performance, and reduce bearing vibration noise.

[0038] like Figure 7 As shown, the pad body 42 has an arc-shaped structure, which is only a part of the ring-shaped structure. The arc-shaped structure fits the outer or inner ring of the bearing 2. The stop block 41 is set at both ends of the pad body 42. This structure uses less material and is more conducive to reducing costs.

[0039] Multiple stop blocks 41 are provided on both sides of the stop block 41. Specifically, the number, position, and shape of the stop blocks 41 can be one or more according to design requirements.

[0040] Example 2

[0041] This embodiment is basically the same as Embodiment 1, except that:

[0042] like Figure 12 As shown, the mating groove II6 is not set on the shoulder of the bearing housing 1, but on the shoulder of the rotating shaft 3. The mating groove I5 is set on the inner ring 22 of the bearing. Correspondingly, the stop pad 4 is set between the inner ring 22 of the bearing and the shoulder of the rotating shaft 3. The rest of the structures are basically similar or only have corresponding changes, and will not be described again.

[0043] In this embodiment, the method used to prevent the inner ring 22 of the bearing from running out of its race is based on the fact that the outer ring 21 of the bearing and the bearing housing 1 are interference fits, and the inner ring 22 of the bearing and the shaft 3 are clearance fits or transition fits. The effect of this embodiment is basically similar to that of embodiment one.

[0044] Example 3

[0045] This embodiment is basically the same as Embodiment 1 and Embodiment 2, except that:

[0046] The stop pad 4 has a stop groove, the bearing 2 has a mating block I, and the bearing seat 1 or the rotating shaft 3 has a mating fastener II. That is, compared with Embodiment 1 and Embodiment 2, the positions of the groove and the fastener are interchanged, which can still meet the requirements of anti-runaway effect, installation convenience and minimal space occupation, but the production cost will be increased.

[0047] The present invention also provides a bearing, wherein the inner ring and / or outer ring side are provided with a mating groove I5 or a mating block I, for mating with a stop pad 4 to form an anti-running ring structure.

[0048] like Figure 3 As shown, the present invention also provides a wave spring, which is a wave spring sheet arranged in a ring shape, and the two ends of the wave spring sheet are respectively provided with stop edges facing both sides.

[0049] The anti-bearing raceway structure proposed in this invention completely solves a series of problems caused by bearing raceway during rotation, such as wear, vibration noise, and product lifespan. It also simplifies the design and manufacturing of current bearing housing bores, significantly improving parts production efficiency and reducing manufacturing costs. While enhancing product performance and reliability, it also greatly extends product lifespan. This invention can be widely applied in the automotive and automotive parts, aerospace, industrial automation, marine engineering equipment, military and special equipment, new energy and energy-saving technologies, and medical devices.

[0050] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0051] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A bearing anti-runout structure comprising a bearing housing (1), a bearing (2) and a rotating shaft (3) connected in sequence, characterized in that, The application further comprises a stop pad (4) provided with a stop block (41) or a stop groove on both sides along the bearing axis, and the stop pad (4) is arranged on one side of the bearing (2) in a matched manner, and the bearing (2) is provided with a matching groove I (5) or a matching block I on the side matched with the stop pad (4), the matching groove I (5) or the matching block I is embedded with the stop block (41) or the stop groove, the hole shoulder of the bearing seat (1) or the shaft shoulder of the rotating shaft (3) is provided with a matching groove II (6) or a matching block II matched with the other stop block (41) or the stop groove, the stop pad (4) comprises a pad body (42), the pad body (42) is in a ring shape, and the stop block (41) is arranged on the pad body (42) along the axial direction.

2. The bearing run-flat structure as set forth in claim 1, wherein The pad body (42) is a wave spring.

3. The bearing run-flat structure of claim 2 wherein, The wave spring is a wave spring leaf arranged in a ring shape, and two stop blocks (41) are arranged at two ends of the spring leaf.

4. The anti-rolling construction of claim 3 wherein, The stop block (41) is formed by bending the end of the spring leaf.

5. The anti-rolling construction of claim 4 wherein, The bending part of the spring leaf is in an arc transition.

6. The bearing run-flat structure as set forth in claim 1, wherein The pad body (42) is in an arc structure, and the stop block (41) is arranged at two ends of the pad body (42).

7. The anti-rolling construction of any one of claims 1 to 6, wherein The stop pad (4) is arranged between the hole shoulder of the bearing seat (1) and the bearing outer ring (21), the matching groove II (6) or the matching block II is arranged on the hole shoulder of the bearing seat (1), or the stop pad (4) is arranged between the shaft shoulder of the rotating shaft (3) and the bearing inner ring (22), and the matching groove II (6) or the matching block II is arranged on the shaft shoulder of the rotating shaft (3). The stop pad (4) is arranged between the hole shoulder of the bearing seat (1) and the bearing outer ring (21), the matching groove II (6) or the matching block II is arranged on the hole shoulder of the bearing seat (1), or the stop pad (4) is arranged between the shaft shoulder of the rotating shaft (3) and the bearing inner ring (22), and the matching groove II (6) or the matching block II is arranged on the shaft shoulder of the rotating shaft (3).

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