Self-aligning needle bearing for automobile steering device
By designing the automotive steering rubber needle roller bearing with spherical colloid and mating structure, the problems of insufficient centering function, lack of sealing structure and rising friction torque in the prior art are solved, and good centering, sealing and stability effects are achieved.
Patent Information
- Application Number
- CN202421980640.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The existing automotive steering rubber needle roller bearings have insufficient centering function during assembly and use, lack of sealing structure, and the friction torque increases sharply when the shaft is swayed, affecting stability.
A center-aligning needle roller bearing including an outer colloid, a cage and an outer ring is designed. The outer peripheral wall of the outer colloid is arranged as a spherical surface, and the center-aligning and sealing functions are realized through the spherical connection and lip blocking structure, and the structural stability is improved through the coordination between the upper and lower steps and the outer ring.
It achieves good center-aligning effects during assembly and use, ensures sealing performance in normal and water-bearing environments, reduces friction torque, and improves structural stability and use effect.
Smart Images
Figure CN222937107U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a self-aligning needle roller bearing for an automotive steering gear. Background Art
[0002] From the perspective of the operating conditions of automotive steering gears, bearing products need to have certain self-aligning and sealing functions. On this basis, reducing the friction of bearing products is the lifelong pursuit of bearings. Specifically, the existing rubber needle roller bearing products for steering gears have the following deficiencies: the existing outer rubber surface is in a straight cylinder shape, which is not conducive to realizing the self-aligning function during the bearing assembly and use processes; at the same time, the rubber needle roller bearings used on the existing steering gears do not have a sealing structure, which is not conducive to the sealing and protection of the bearings when the vehicle body wades through water, thus affecting the service performance of the bearings; and for the existing bearing structure, when the shaft deflects, the frictional torque during the bearing operation will increase sharply, making it difficult to meet the requirement of low friction in the working conditions and affecting the stability of the structure during use. Content of the Utility Model
[0003] Aiming at the deficiencies of the prior art, the utility model provides a self-aligning needle roller bearing for an automotive steering gear, which has a simple layout, good self-aligning effect, and at the same time, the overall structure is more stable and reliable, with good use effects.
[0004] To achieve the above object, the utility model provides a self-aligning needle roller bearing for an automotive steering gear, which comprises an outer rubber body, a cage, and an outer ring. A connecting hole is formed on the outer rubber body, the outer ring is arranged in the connecting hole, a positioning edge is formed by bending the upper edge of the outer ring, the cage is arranged on the positioning edge and is in clearance fit with the inner wall of the outer ring, a plurality of pocket holes are arranged on the cage, needle rollers are rotatably fitted in the pocket holes, the upper edge and the lower edge of the connecting hole of the outer rubber body are connected by a spherical surface, and a retaining lip is arranged at the opening position of the connecting hole on the outer rubber body.
[0005] The beneficial effect of such a setting is: by setting the outer peripheral wall of the outer rubber body as a spherical surface in this way, the bearing can fully exert its self-aligning function during the assembly and use processes. Further, through the retaining lip structure, after the shaft is assembled, the sealing performance inside the rubber cavity can be ensured, so as to ensure that the bearing has good sealing performance in both normal and wading environments of the steering gear. At the same time, the overall structure is simple, the cost is low, the assembly is convenient, and it has good use stability.
[0006] As a further setting of the utility model, upper and lower steps are formed on the inner wall of the connecting hole of the outer rubber body, the positioning edge of the outer ring abuts against the lower step, and a gasket is arranged between the upper step and the upper edge of the outer ring.
[0007] The beneficial effects of such a setting are as follows: With such a setting, through the cooperation of the upper and lower steps and the outer ring, the stability of the structure is improved. This structure is simple, the positioning is reliable, and it has a good usage effect.
[0008] As a further setting of the present utility model, the edge of the gasket extends into the connecting hole and abuts against the upper edge of the cage.
[0009] The beneficial effects of such a setting are as follows: With such a setting, the axial limit of the cage can be achieved through the combination of the gasket and the positioning edge. This structure is simple and has a good usage effect.
[0010] As a further setting of the present utility model, the cage is provided with a break, and a break groove is provided on the outer ring. The break groove is arranged in a V shape.
[0011] The beneficial effects of such a setting are as follows: With such a setting, while improving the flexibility of the bearing, the stability of the roller contact is maintained during deformation, thereby reducing the frictional torque of the bearing, avoiding the cage from tipping over, and improving the stability of the structure in use.
[0012] As a further setting of the present utility model, shallow grooves are provided between the pocket holes on the cage.
[0013] The beneficial effects of such a setting are as follows: With such a setting, the structural mass is effectively reduced, making the structure operate more smoothly. Moreover, the structure is simple and the processing is convenient, having a good usage effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a structural schematic diagram of an embodiment of the present utility model;
[0015] Figure 2 is a cross-sectional view of an embodiment of the present utility model;
[0016] Figure 3 is a structural schematic diagram of the base in an embodiment of the present utility model;
[0017] Figure 4 is a structural schematic diagram of the housing in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] An embodiment of the present utility model for the self-aligning needle roller bearing used in an automotive steering gear is as Figures 1 to 4As shown in the figure, it includes a housing 2 and a base 1. The base 1 is inserted with plug pins 11. A touch button 3 is movably arranged on the housing 2. A connecting member for connecting the plug pins 11 when the touch button 3 is touched is connected to the touch button 3. A reset spring for resetting the connecting member to disconnect the connection of the plug pins 11 after the touch of the touch button 3 fails is abutted between the connecting member and the base 1. The housing 2 covers the base 1. The side wall of the base 1 and the inner wall of the housing 2 are connected by laser welding. A conical hole 21 for injecting gas into the housing 2 is arranged on the housing 2 on one side of the touch button 3. A step groove 22 for injecting glue after detection is arranged on the housing 2 in the circumferential direction of the conical hole 21. The beneficial effect of such a setting is: With such a setting, through laser welding, the housing 2 and the base 1 can be stably connected without generating gaps, ensuring the sealing effect. When performing airtightness detection, air is injected through the conical hole 21 to perform airtightness testing. After the testing is completed, glue can be applied in the step groove 22 to seal the overall structure and ensure the airtightness of the overall structure. This structure is simple, and at the same time, the layout is more reasonable, and the production and processing are convenient, with good use effects.
[0019] As a further setting of this embodiment, a retaining wall 25 is arranged on the housing 2 in the circumferential direction of the touch button 3. A sealing groove 26 is arranged between the retaining wall 25 and the touch button 3. A sealing rubber sleeve 4 is sleeved on the touch button 3. The bottom of the sealing rubber sleeve 4 is clamped in the sealing groove 26. The beneficial effect of such a setting is: With such a setting, the sealing effect is further improved, preventing external dirt from entering the housing 2 from the position of the touch button 3, ensuring the use stability of the structure. At the same time, the structure is simple, and the production and processing are convenient, with good use effects.
[0020] As a further setting of this embodiment, a connecting groove 31 is arranged on the touch button 3. The end of the sealing rubber sleeve 4 is clamped in the connecting groove 31. The beneficial effect of such a setting is: With such a setting, the connection stability of the rubber sleeve is further ensured, and the sealing effect is ensured. At the same time, the structure is simple and is conducive to implementation, with good use effects.
[0021] As a further setting of this embodiment, a limiting platform 12 is arranged on the base 1 along the circumferential direction. A positioning platform 23 is arranged on the inner wall of the housing 2. The limiting platform 12 abuts against the positioning platform 23. The beneficial effect of such a setting is: With such a setting, it can ensure that the base 1 and the housing 2 are installed in place, ensuring the connection stability of the structure. At the same time, the structure is simple and is conducive to implementation, with good use effects.
[0022] As a further setting of this embodiment, a guide groove 24 and a guide block 13 are further arranged between the inner wall of the housing 2 and the base 1. The guide block 13 is in plug-in fit with the guide groove 24. The beneficial effect of such a setting is: With such a setting, the assembly stability of the structure is further improved. At the same time, the structure is simple and is conducive to implementation, with good use effects.
[0023] The above examples are only one of the preferred specific examples of the present utility model. All ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are included in the protection scope of the present utility model.
Claims
1. A self-aligning needle roller bearing for automobile steering gear, comprising an outer colloid, a retaining frame and an outer ring, wherein a connecting hole is provided on the outer colloid, and the outer ring is arranged in the connecting hole, characterized in that: The upper edge of the outer ring is bent to form a positioning edge, the retaining frame is arranged on the positioning edge and is gap-matched with the inner wall of the outer ring, a plurality of pockets are arranged on the retaining frame, and rollers are rotatably fitted in the pockets, the upper edge and the lower edge of the external colloid connecting hole are connected by a spherical surface, and a blocking lip is arranged on the external colloid at the opening position of the connecting hole.
2. The self-aligning needle roller bearing for automobile steering gear according to claim 1, characterized in that: The outer colloid is formed with an upper step and a lower step on the inner wall of the connecting hole, the outer ring positioning edge abuts against the lower step, and a gasket is arranged between the upper step and the upper edge of the outer ring.
3. The self-aligning needle roller bearing for automobile steering gear according to claim 2, characterized in that: The edge of the gasket extends into the connecting hole and is blocked on the upper edge of the retaining frame.
4. The self-aligning needle roller bearing for automobile steering gear according to claim 1, 2 or 3, characterized in that: The retaining frame is provided with a fracture, and the outer ring is provided with a fracture groove, and the fracture groove is provided in a V shape.
5. The self-aligning needle roller bearing for automobile steering gear according to claim 1, characterized in that: Shallow grooves are arranged between the pockets on the retaining frame.