An eccentric bearing rivet sealing retaining device and eccentric bearing rivet sealing structure

Abstract

The application relates to an eccentric bearing riveting retaining device and an eccentric bearing riveting structure, which comprise a limiting ring arranged coaxially on the outer small-diameter section of the eccentric bearing and abutting against the inner wall of a steering gear housing; at least two riveting pieces connected to the outer wall of the limiting ring, the at least two riveting pieces being arranged at intervals in the circumferential direction of the limiting ring and being used for riveting with the end face of the steering gear housing; and a riveting ring arranged coaxially in the limiting ring, the riveting ring being connected to the limiting ring through a connecting structure, the riveting ring being arranged on the outer small-diameter section of the eccentric bearing and abutting against the outer wall of the eccentric bearing, at least two riveting points being arranged on the riveting ring at intervals in the circumferential direction of the riveting ring, and the riveting ring being adapted to be damaged at the riveting points and riveted with the end face of the eccentric bearing. The eccentric bearing and the steering gear housing are connected through the riveting retaining device, the riveting retaining device and the eccentric bearing are two independent workpieces, quenching treatment is respectively performed during manufacturing, and the manufacturing difficulty and cost of the parts are reduced.

Description

Technical Field

[0001] This invention relates to the technical field of steering gears, specifically to an eccentric bearing sealing and retaining device and an eccentric bearing sealing and retaining structure. Background Technology

[0002] Recirculating ball power steering systems are widely used in commercial vehicles due to their large output torque and steering angle, high reliability, and long lifespan. Currently, power steering assemblies on the market are mainly divided into side cover adjustment structures and eccentric bearing adjustment structures. Eccentric bearing adjustment offers higher reliability (steering clearance increases more slowly with increasing vehicle mileage) and higher mechanical efficiency. Therefore, it is a common structure in high-output torque steering systems for commercial vehicles.

[0003] The eccentric bearing adjustment structure of a recirculating ball power steering system mainly refers to the radial clearance adjustment structure of the rocker arm shaft. The steering gear kinematic pair consists of the rocker arm shaft and the rack and pinion piston. The radial clearance of the rocker arm shaft is achieved by synchronously adjusting the eccentric bearings at both ends. Because the vertical arm connecting the steering rocker arm shaft is relatively long, and the steering output torque is very large, when the steering wheel is turned, it is very easy to cause the eccentric bearing and the rocker arm shaft to rotate synchronously. Therefore, after the rocker arm shaft clearance is adjusted, the outer edge stop of the eccentric bearing is sealed with rivets to prevent loosening and to prevent steering drift and other malfunctions caused by increased free clearance.

[0004] like Figure 1 and Figure 2 The eccentric bearing shown has a circumferential boss structure designed on its outer edge. After the radial clearance of the rocker arm shaft is adjusted, the sealing point of this boss needs to be stamped and deformed to rivet it with the housing, thereby preventing the free clearance from increasing due to the loosening of the eccentric bearing under force.

[0005] The primary function of an eccentric bearing is to support the rocker arm shaft in its centering circular motion. The rocker arm shaft outputs a torque of 7000–9000 Nm, which places high strength requirements on the eccentric bearing, necessitating surface hardening to achieve the required surface hardness. However, since the eccentric bearing is riveted at its outer edge in related technologies, the hardness of this outer edge cannot be too high. This means that different contact surfaces of the eccentric bearing have different hardness requirements. Therefore, segmented heat treatment is necessary, which places high demands on the heat treatment process and directly results in high manufacturing costs. Summary of the Invention

[0006] Based on the above description, the present invention provides an eccentric bearing sealing and retaining device and an eccentric bearing sealing and riveting structure to solve the problem in related technologies that eccentric bearings need to undergo segmented heat treatment, which has high requirements for heat treatment processes and results in high manufacturing costs for parts.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0008] Firstly, this application provides an eccentric bearing sealing and retaining device, the technical solution of which is as follows:

[0009] An eccentric bearing sealing and retaining device includes:

[0010] The limiting ring is used to be coaxially mounted on the outside of the small diameter section of the eccentric bearing and fits against the inner wall of the steering gear housing.

[0011] At least two rivet members are connected to the outer wall of the limiting ring, and the at least two rivet members are spaced apart along the circumference of the limiting ring. The rivet members are used to rivet with the end face of the steering gear housing.

[0012] A riveting ring is disposed inside the limiting ring and coaxial with the limiting ring. The riveting ring is connected to the limiting ring through a connecting structure. The riveting ring is used to encircle the small diameter section of the eccentric bearing and fit against the outer wall of the eccentric bearing. The riveting ring is provided with at least two riveting points, which are spaced apart along the circumference of the riveting ring. The riveting ring is adapted to be broken at the riveting points and riveted to the end face of the eccentric bearing.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Preferably, the riveting component includes a riveting block, which is formed by partially bending the limiting ring outward, and the limiting ring has a notch at the riveting block.

[0015] Preferably, the connecting structure includes a connecting ring, which is disposed between the limiting ring and the riveting ring and is coaxial with the limiting ring. The outer peripheral side of the limiting ring is fixed to the limiting ring and the inner peripheral side is fixed to the riveting ring.

[0016] Preferably, the limiting ring, the connecting ring, and the riveting ring are integrally stamped.

[0017] Secondly, this application provides an eccentric bearing sealing and riveting structure, including:

[0018] Steering gear housing;

[0019] An eccentric bearing is coaxially disposed within the steering gear housing;

[0020] A sealing and retaining device, disposed between the steering gear housing and the small-diameter section of the eccentric bearing, for connecting the eccentric bearing and the steering gear housing, includes:

[0021] - The limiting ring, whose coaxial ring is located outside the small diameter section of the eccentric bearing and fits against the inner wall of the steering gear housing;

[0022] - At least two riveting members are connected to the outer wall of the limiting ring, and the at least two riveting members are spaced apart along the circumference of the limiting ring. The riveting members are used to rivet with the end face of the steering gear housing.

[0023] - A riveting ring, which is located inside the limiting ring and coaxial with the limiting ring, is connected to the limiting ring through a connecting structure. The riveting ring is arranged around the small diameter section of the eccentric bearing and fits against the outer wall of the eccentric bearing. The riveting ring has at least two riveting points, which are spaced apart along the circumference of the riveting ring. The riveting ring is broken at the riveting points and riveted to the end face of the eccentric bearing.

[0024] Preferably, the riveting component includes a riveting block, which is formed by partially bending the limiting ring outward, and the limiting ring has a notch at the riveting block.

[0025] Preferably, the end face of the eccentric bearing is provided with a riveting groove for riveting the riveting ring, and the riveting ring is broken at the riveting point so that it is bent inward and embedded in the riveting groove and riveted to the eccentric bearing.

[0026] Preferably, the small-diameter section of the eccentric bearing is fitted with a disc spring coaxial with it, and the inner wall of the steering gear housing is provided with a receiving groove for the disc spring to be embedded. The receiving groove is opened along the circumference of the steering gear housing, and the outer edge of the disc spring is embedded in the receiving groove. The disc spring abuts against the steering gear housing and the large-diameter section of the eccentric bearing in the axial direction.

[0027] Preferably, the connecting structure includes a connecting ring, which is disposed between the limiting ring and the riveting ring and is coaxial with the limiting ring. The outer peripheral side of the limiting ring is fixed to the limiting ring and the inner peripheral side is fixed to the riveting ring.

[0028] Preferably, the limiting ring, the connecting ring, and the riveting ring are integrally stamped.

[0029] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0030] 1. This application adds a sealing and retaining device between the eccentric bearing and the steering gear housing. During installation, the sealing and retaining device is pressed axially between the eccentric bearing and the steering gear housing. The rivet ring is in contact with the outer wall of the small diameter section of the eccentric bearing, and the limiting ring is in contact with the inner wall of the steering gear housing. When the rivet and the end face of the steering gear housing abut against each other, the rivet device rivets the rivet and the end face of the steering gear housing. The rivet point of the rivet ring is broken until it is riveted to the end face of the eccentric bearing. The sealing and retaining device is riveted and fixed to the steering gear housing and the eccentric bearing. The sealing and retaining device fixes the eccentric bearing and the steering gear housing, restricting the relative rotation of the eccentric bearing and the steering gear housing. The sealing and retaining device and the eccentric bearing are two independent workpieces. They are quenched separately according to the design requirements during processing, thereby reducing the manufacturing difficulty and cost of the parts.

[0031] 2. The sealing and retaining device of this application can be manufactured by stamping steel plate, which is simple to process and manufacture and has low part cost;

[0032] 3. This application uses a sealing and riveting retaining device to connect the eccentric bearing and the steering gear housing. The sealing and riveting process will not damage the structure of the eccentric bearing and the steering gear housing, which is beneficial to the maintenance and replacement of the steering gear and the eccentric bearing and improves the service life of the eccentric bearing. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the eccentric bearing in the background art of this application;

[0034] Figure 2 This is a partial cross-sectional schematic diagram of an eccentric bearing in the background art of this application;

[0035] Figure 3 This is a schematic diagram of the structure of the eccentric bearing sealing and retaining device provided in the embodiments of this application;

[0036] Figure 4 This is a schematic diagram of the eccentric bearing sealing and riveting structure provided in the embodiments of this application;

[0037] Figure 5 This is a schematic diagram of the riveting groove on the eccentric bearing in the eccentric bearing sealing and riveting structure provided in the embodiments of this application.

[0038] The attached diagram lists the components represented by each number as follows:

[0039] 1. Limiting ring; 11. Riveting block; 2. Riveting ring; 21. Riveting point; 3. Connecting ring; 4. Eccentric bearing; 41. Riveting groove; 5. Steering gear housing; 6. Disc spring. Detailed Implementation

[0040] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0042] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0043] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0044] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0045] Reference Figure 3-5As shown, this application embodiment provides an eccentric bearing sealing and retaining device, which is used to connect the eccentric bearing 4 and the steering gear housing 5 between the steering gear housing 5 and the small diameter section of the eccentric bearing 4. It includes a limiting ring 1 and a riveting ring 2. The limiting ring 1 is coaxially arranged around the small diameter section of the eccentric bearing 4 and fits against the inner wall of the steering gear housing 5. The riveting ring 2 is arranged inside the limiting ring 1 and coaxial with the limiting ring 1. The riveting ring 2 is connected to the limiting ring 1 through a connecting structure. The riveting ring 2 is used to be arranged around the small diameter section of the eccentric bearing 4 and fits against the outer wall of the eccentric bearing 4. At least two riveting members are connected to the outer wall of the limiting ring 1. The at least two riveting members are arranged circumferentially around the limiting ring 1. The riveting members are used to rivet with the end face of the steering gear housing 5. The riveting ring 2 is provided with at least two riveting points 21. The at least two riveting points 21 are arranged circumferentially around the riveting ring 2. The riveting ring 2 is adapted to be broken at the riveting points 21 and riveted with the end face of the eccentric bearing 4.

[0046] The axial length and radial thickness of the limiting ring 1 and the riveting ring 2 are designed according to the needs, so that they can be pressed into the steering gear housing 5 and the eccentric bearing 4 and facilitate the riveting operation, while having sufficient structural strength.

[0047] Reference Figure 3-4 As shown, the connecting structure includes a connecting ring 3, which is located between the limiting ring 1 and the riveting ring 2 and is coaxial with the limiting ring 1. The outer periphery of the limiting ring 1 is fixed to the limiting ring 1, and the inner periphery is fixed to the riveting ring 2. Specifically, in this embodiment, the connecting ring 3, the riveting ring 2, and the limiting ring 1 are integrally stamped from a single steel plate. The connecting ring 3 is located at one end of the axial direction of the limiting ring 1 and the riveting ring 2. Correspondingly, to facilitate the riveting of the riveting ring 2 and the eccentric bearing 4, the riveting point 21 on the riveting ring 2 is located at one end edge away from the connecting ring 3 in its axial direction. In this way, when the sealing and retaining device is pressed between the eccentric bearing 4 and the steering gear housing 5, the end of the connecting ring 3 faces the inside of the steering gear housing 5, and the riveting point 21 is on the outside to facilitate the riveting operation.

[0048] Reference Figure 3-4 As shown, the riveting component further includes a riveting block 11, which is formed by partially bending the limiting ring 1 outwards. The limiting ring 1 has a notch at the riveting block 11. Correspondingly, to facilitate the riveting of the riveting block 11 and the steering gear housing 5, the end of the limiting block axially away from the connecting ring 3 is partially stamped to form an outwardly bent riveting block 11. Thus, when the sealing and retaining device is pressed between the eccentric bearing 4 and the steering gear housing 5, the riveting block 11 can act as a limit, preventing excessive pressing and facilitating the riveting operation. Specifically, the length of the riveting block 11 along the circumference of the limiting ring 1 is set as needed.

[0049] In this embodiment, two riveting blocks 11 and two riveting points 21 are provided for illustration. The two riveting blocks 11 are symmetrically distributed on both sides of the limiting ring 1, and the riveting points 21 are symmetrically distributed on both sides of the riveting ring 2.

[0050] A sealing and retaining device is added between the eccentric bearing 4 and the steering gear housing 5. The sealing and retaining device is riveted and fixed to the steering gear housing 5 and the eccentric bearing 4. The eccentric bearing 4 and the steering gear housing 5 are connected by the sealing and retaining device, which can restrict the relative rotation of the eccentric bearing 4 and the steering gear housing 5. The sealing and retaining device and the eccentric bearing 4 are two independent workpieces. They are quenched separately according to the design requirements during processing, thereby reducing the difficulty and cost of manufacturing parts.

[0051] On the other hand, this application embodiment also provides an eccentric bearing sealing structure, including a steering gear housing 5, an eccentric bearing 4, and a sealing and retaining device as described above.

[0052] Reference Figure 4 As shown, the eccentric bearing 4 is coaxially mounted inside the steering gear housing 5. The outer wall of the large-diameter section of the eccentric bearing 4 fits against the inner wall of the steering gear housing 5, while the small-diameter section of the eccentric bearing 4 is located on the outer side. A disc spring 6, coaxial with the small-diameter section of the eccentric bearing 4, is sleeved on the small-diameter section. A receiving groove for the disc spring 6 is formed on the inner wall of the steering gear housing 5, and the receiving groove is formed circumferentially around the steering gear housing 5. The outer edge of the disc spring 6 is embedded in the receiving groove, and the disc spring 6 abuts against the steering gear housing 5 and the large-diameter section of the eccentric bearing 4 in the axial direction. The disc spring 6 can apply axial pressure to the eccentric bearing 4 and play a role in vibration damping.

[0053] Reference Figure 3-4 As shown, the sealing and retaining device is located between the steering gear housing 5 and the small diameter section of the eccentric bearing 4. The limiting ring 1 of the sealing and retaining device is coaxially located outside the small diameter section of the eccentric bearing 4 and fits against the inner wall of the steering gear housing 5. The riveting block 11 on the limiting ring 1 is riveted to the end face of the steering gear housing 5. The riveting ring 2 is located outside the small diameter section of the eccentric bearing 4 and fits against the outer wall of the eccentric bearing 4. The riveting ring 2 is destroyed at the riveting point 21 and riveted to the end face of the eccentric bearing 4.

[0054] Reference Figure 4-5 As shown, further, a riveting groove 41 for riveting the riveting ring 2 is provided on the end face of the eccentric bearing 4. The riveting ring 2 is broken at the riveting point 21 and bent inward to be embedded in the riveting groove 41 and riveted with the eccentric bearing 4, which can improve the riveting strength of the riveting ring 2 and the eccentric bearing 4 and improve the strength of the sealing riveting structure.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An eccentric bearing sealing and retaining device, characterized in that, include: The limiting ring (1) is used to be coaxially mounted on the outside of the small diameter section of the eccentric bearing (4) and fits against the inner wall of the steering gear housing (5); At least two rivets are connected to the outer wall of the limiting ring (1), and the at least two rivets are arranged circumferentially around the limiting ring (1). The rivets are used to rivet with the end face of the steering gear housing (5). A riveting ring (2) is disposed inside the limiting ring (1) and coaxial with the limiting ring (1). The riveting ring (2) is connected to the limiting ring (1) through a connecting structure. The riveting ring (2) is used to be encircled outside the small diameter section of the eccentric bearing (4) and fit against the outer wall of the eccentric bearing (4). The riveting ring (2) is provided with at least two riveting points (21). The at least two riveting points (21) are arranged circumferentially along the riveting ring (2). The riveting ring (2) is adapted to be broken at the riveting point (21) and riveted to the end face of the eccentric bearing (4).

2. The eccentric bearing sealing and retaining device according to claim 1, characterized in that: The riveting component includes a riveting block (11), which is formed by bending the limiting ring (1) partially outward, and the limiting ring (1) forms a notch at the riveting block (11).

3. The eccentric bearing sealing and retaining device according to claim 1, characterized in that: The connection structure includes a connecting ring (3), which is located between the limiting ring (1) and the riveting ring (2) and is coaxial with the limiting ring (1). The outer periphery of the limiting ring (1) is fixed to the limiting ring (1) and the inner periphery is fixed to the riveting ring (2).

4. The eccentric bearing sealing and retaining device according to claim 3, characterized in that: The limiting ring (1), the connecting ring (3) and the riveting ring (2) are integrally stamped.

5. An eccentric bearing sealing and riveting structure, characterized in that, include: Steering gear housing (5); An eccentric bearing (4) is coaxially disposed within the steering gear housing (5); A sealing and retaining device, disposed between the steering gear housing (5) and the small-diameter section of the eccentric bearing (4), for connecting the eccentric bearing (4) and the steering gear housing (5), comprising: -Limiting ring (1), whose coaxial ring is located outside the small diameter section of the eccentric bearing (4) and fits against the inner wall of the steering gear housing (5); - At least two rivet members are connected to the outer wall of the limiting ring (1), and the at least two rivet members are arranged circumferentially along the limiting ring (1). The rivet members are used to rivet with the end face of the steering gear housing (5). - A riveting ring (2) is located inside the limiting ring (1) and coaxial with the limiting ring (1). The riveting ring (2) is connected to the limiting ring (1) through a connecting structure. The riveting ring (2) is encircled outside the small diameter section of the eccentric bearing (4) and fits against the outer wall of the eccentric bearing (4). The riveting ring (2) has at least two riveting points (21). The at least two riveting points (21) are spaced apart along the circumference of the riveting ring (2). The riveting ring (2) is broken at the riveting point (21) and riveted to the end face of the eccentric bearing (4).

6. The eccentric bearing sealing and riveting structure according to claim 5, characterized in that: The riveting component includes a riveting block (11), which is formed by bending the limiting ring (1) partially outward, and the limiting ring (1) forms a notch at the riveting block (11).

7. The eccentric bearing sealing and riveting structure according to claim 5, characterized in that: The end face of the eccentric bearing (4) is provided with a riveting groove (41) for riveting the riveting ring (2). The riveting ring (2) is broken at the riveting point (21) and bent inward to fit into the riveting groove (41) and riveted to the eccentric bearing (4).

8. The eccentric bearing sealing and riveting structure according to claim 5, characterized in that: The small diameter section of the eccentric bearing (4) is fitted with a disc spring (6) coaxial with it. The inner wall of the steering gear housing (5) is provided with a receiving groove for the disc spring (6) to be embedded. The receiving groove is opened along the circumference of the steering gear housing (5). The outer edge of the disc spring (6) is embedded in the receiving groove. The disc spring (6) abuts against the steering gear housing (5) and the large diameter section of the eccentric bearing (4) in the axial direction.

9. The eccentric bearing sealing and riveting structure according to claim 5, characterized in that: The connection structure includes a connecting ring (3), which is located between the limiting ring (1) and the riveting ring (2) and is coaxial with the limiting ring (1). The outer periphery of the limiting ring (1) is fixed to the limiting ring (1) and the inner periphery is fixed to the riveting ring (2).

10. The eccentric bearing sealing and riveting structure according to claim 9, characterized in that: The limiting ring (1), the connecting ring (3) and the riveting ring (2) are integrally stamped.

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