Wear-resistant bearing for long slide rail of automobile seat
By providing a concave structure on the outer wall of the bearing outer ring and a convex structure on the inner wall of the plastic layer, and using the plastic layer extension of PEEK material, the shortcomings in wear resistance and reliability of the existing bearings are solved, and stable bonding and high wear resistance of the bearing are achieved.
Patent Information
- Application Number
- CN202520605389.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2035-04-02
AI Technical Summary
The existing bearings for long-slide rails for automobile seats have insufficient wear resistance and reliability. Poor adhesion of the plastic layer to the bearing leads to relative movement, and the wear resistance of the external plastic layer is insufficient.
A first concave structure and a second concave structure are provided on the outer wall of the bearing outer ring, and a first convex structure and a second convex structure are provided on the inner wall of the plastic layer. Extensions are provided at both axial ends of the plastic layer to wrap the end surface of the outer ring, and the plastic layer is made of PEEK material.
Through the mutually coordinating concave structure and convex structure and the extension of the plastic layer, the stable adhesion between the plastic layer and the bearing is ensured, relative displacement is avoided, and the overall reliability and wear resistance of the bearing are improved.
Smart Images
Figure CN222880136U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bearing. Background Art
[0002] When the car seat moves forward and backward on the long slide rail, the bearing needs to be smooth and comfortable. Injecting a plastic layer on the outside of the bearing can ensure comfort during the sliding process. However, in the prior art, this type of bearing still has certain deficiencies in wear resistance and reliability. For example, the plastic layer and the bearing cannot be well bonded, resulting in relative movement between the two in the circumferential or axial direction, and the wear resistance of the external plastic layer is not enough. Utility Model Content
[0003] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a more reliable wear-resistant bearing for a long slide rail of a car seat.
[0004] The utility model is realized by the following technical solutions:
[0005] A wear-resistant bearing for a long slide rail of an automobile seat, comprising an inner ring, an outer ring, a ball disposed between the inner ring and the outer ring, and a sealing ring disposed on both axial sides of the bearing, wherein a plastic layer is injection-molded on the outer side of the outer ring, and characterized in that a first concave structure and a second concave structure are provided on the outer wall of the outer ring, the first concave structure and the second concave structure are respectively provided along the circumferential direction of the outer wall of the outer ring and are arranged at intervals in the axial direction, a first convex structure and a second convex structure matching the first concave structure and the second concave structure are convexly provided on the inner wall of the plastic layer, extension portions are respectively extended radially inwardly at both axial ends of the plastic layer, the extension portions respectively wrap a portion of the outer ring end face, and the circumferential outer wall of the plastic layer is provided as an arc surface along its axial direction.
[0006] Preferably, the first concave structure and the second concave structure are annular grooves provided on the outer wall of the outer ring, the cross-section of the annular grooves is set to be arc-shaped, and the first convex structure and the second convex structure are annular convex rings matching the annular grooves.
[0007] Preferably, the first concave structure and the second concave structure are a plurality of concave points surrounding the outer wall of the outer ring, the cross-section of the concave points is set to be arc-shaped and the concave points are arranged at intervals, and the first convex structure and the second convex structure are convex points matching the concave points.
[0008] Preferably, the ball is arranged in the ball groove, the sealing rings on both sides are respectively located in the corresponding sealing ring grooves, and the first concave structure and the second concave structure are respectively located between the ball groove and the sealing ring grooves on both sides.
[0009] Preferably, the plastic layer is made of PEEK material.
[0010] Preferably, the radius of the arc-shaped cross-section of the first concave structure and the second concave structure is greater than its depth.
[0011] Preferably, the radius of the first concave structure and the second concave structure is 0.4±0.02 mm, and the depth is 0.35±0.05 mm.
[0012] Preferably, the extension length of the extension portion is 1.1 mm to 1.3 mm.
[0013] Preferably, the outer diameter of the outer ring of the bearing is 14.992 mm to 15 mm, and the height is 4.88 mm to 5 mm. After being coated with the plastic layer, the outer diameter of the bearing is 18.9 mm to 19.1 mm, and the height is 6.85 mm to 7.15 mm.
[0014] The utility model provides a concave structure on the outer wall of the bearing outer ring, and a matching convex structure on the inner wall of the plastic layer, the two cooperate with each other, and the plastic layer is provided with an extension portion to wrap part of the outer ring end face, so that the plastic layer is stable and reliable in the axial direction and the circumferential direction, and will not produce relative displacement. The plastic layer of the present application adopts PEEK material, which has good wear resistance.
[0015] The beneficial effect of the utility model is that the utility model makes the bearing as a whole reliable and wear-resistant and suitable for the use environment requirements through the reasonable arrangement of the concave structure and the convex structure that cooperate with each other and the extension part of the plastic layer and the control of the size of each structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model.
[0017] Figure 2 It is a structural schematic diagram of the utility model in which the concave structure is an annular groove.
[0018] Figure 3 It is a structural schematic diagram of the utility model in which the concave structure is a concave point. DETAILED DESCRIPTION
[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0020] like Figure 1 , 2As shown in Figure 3, a wear-resistant bearing for a long slide rail of a car seat comprises an inner ring 3, an outer ring 1, a ball 2 arranged between the inner ring and the outer ring, and sealing rings arranged on both sides of the bearing, wherein the ball is arranged in a ball groove 9, and the sealing rings on both sides are arranged in corresponding sealing ring grooves 4. A plastic layer 8 is also injection-molded on the outer side of the outer ring, and a first concave structure 5 and a second concave structure 7 are provided on the outer wall of the outer ring. The first concave structure 5 and the second concave structure 7 are respectively provided along the circumferential direction of the outer wall of the outer ring and are arranged at intervals in the axial direction. The first concave structure and the second concave structure are respectively located between the ball groove 9 and the sealing ring grooves 4 on both sides. Since the groove reduces the wall thickness of the outer ring of the bearing, if a concave structure is provided at the corresponding position of the groove, the structural strength will inevitably be reduced. Therefore, two concave structures are provided, and are respectively provided between the ball groove and the sealing ring grooves on both sides, so that the provision of the concave structure does not affect the structural strength of the outer ring. The inner wall of the plastic layer is convexly provided with a first convex structure and a second convex structure matching the first concave structure 5 and the second concave structure 7, so that the plastic layer can be well bonded to the outer ring of the bearing to avoid relative displacement between the plastic layer and the bearing during operation.
[0021] The two axial ends of the plastic layer 8 are radially extended inward to form extension parts 10, which respectively wrap part of the end surface of the outer ring 1. The extension length of the extension part is 1.1mm-1.3mm, so that the plastic layer will not produce relative displacement with the bearing in the axial direction. Whether it is the concave-convex matching structure or the plastic layer extension part wrapping the outer ring, the plastic layer and the bearing are well bonded to avoid relative displacement.
[0022] The circumferential outer wall 6 of the plastic layer is set as an arc surface along its axial direction. During the sliding process of the car seat, the bearing may tilt. If it is a plane, the outer surface of the plastic layer will have line contact with the contact surface of other components. The arc surface can ensure surface contact when tilting, increase its load-bearing capacity, and have good self-alignment.
[0023] In the present application, the concave structure can be set in two ways, one is, Figure 2 As shown, the first concave structure 5 and the second concave structure 7 are annular grooves arranged on the outer wall of the outer ring, and the cross section of the annular groove is set to be arc-shaped, and the first convex structure and the second convex structure are annular convex rings matching the annular grooves. Figure 3 As shown, the first concave structure and the second concave structure are a number of concave points surrounding the outer wall of the outer ring, the concave point cross section is set to be arc-shaped and the concave points are arranged at intervals, and the first convex structure and the second convex structure are convex points matching the concave points. That is, one is a continuous groove and the other is a dot matrix. The dot matrix method has a better effect of preventing displacement in the circumferential direction. The concave points can be set at equal intervals or unequal intervals. The unequal interval method has low requirements on the production process. Regardless of the method, the cross section of the concave structure is arc-shaped to avoid stress concentration in the rectangular cross section and cause cracking.
[0024] The plastic layer 8 is made of PEEK material, which is better than general plastic materials in terms of wear resistance and load-bearing capacity.
[0025] The radius of the arc-shaped cross-section of the first concave structure and the second concave structure is greater than its depth. The radius of the first concave structure and the second concave structure is 0.4±0.02mm, and the depth is 0.35±0.05mm. The outer diameter of the outer ring of the bearing is 14.992mm~15mm, and the height is 4.88mm~5mm. After the plastic layer is wrapped, the outer diameter of the bearing is 18.9mm~19.1mm, and the height is 6.85mm~7.15mm. It is specially used for long slide rails of car seats. There are restrictions on the size of the bearing, and in order to ensure the structural strength, the wrapping thickness of the plastic layer and the size of the concave structure are limited.
[0026] The utility model provides a concave structure on the outer wall of the bearing outer ring, and a matching convex structure on the inner wall of the plastic layer, the two cooperate with each other, and the extended part of the plastic layer wraps part of the outer ring end face, so that the plastic layer is stable and reliable in the axial direction and the circumferential direction, and will not produce relative displacement. The plastic layer of the present application adopts PEEK material, which has good wear resistance.
[0027] The utility model makes the bearing as a whole reliable and wear-resistant, and suitable for the use environment requirements, through the mutually matched concave structure and convex structure, the reasonable arrangement of the plastic layer extension part, and the control of the size.
Claims
1. A wear-resistant bearing for a long slide rail of a car seat, comprising an inner ring, an outer ring, balls arranged between the inner ring and the outer ring, and sealing rings arranged on both sides of the bearing axial direction, wherein a plastic layer is injection-molded outside the outer ring, and the characteristics are: The outer wall of the outer ring is provided with a first concave structure and a second concave structure, the first concave structure and the second concave structure are respectively provided along the circumferential direction of the outer wall of the outer ring and are arranged at intervals in the axial direction, the inner wall of the plastic layer is convexly provided with a first convex structure and a second convex structure matching the first concave structure and the second concave structure, the axial ends of the plastic layer are respectively provided with extension parts extending radially inward, the extension parts respectively wrap part of the end face of the outer ring, and the circumferential outer wall of the plastic layer is set as an arc surface along its axial direction.
2. The wear-resistant bearing for a long slide rail of a car seat according to claim 1, characterized in that: The first concave structure and the second concave structure are annular grooves arranged on the outer wall of the outer ring, and the cross-section of the annular groove is set to be arc-shaped. The first convex structure and the second convex structure are annular convex rings matching the annular grooves.
3. The wear-resistant bearing for a long slide rail of a car seat according to claim 1, characterized in that: The first concave structure and the second concave structure are a plurality of concave points surrounding the outer wall of the outer ring, the cross-section of the concave points is set to be arc-shaped and the concave points are arranged at intervals, and the first convex structure and the second convex structure are convex points matching the concave points.
4. The wear-resistant bearing for a long slide rail of a car seat according to claim 2 or 3, characterized in that: The ball is arranged in the ball groove, the sealing rings on both sides are respectively located in the corresponding sealing ring grooves, and the first concave structure and the second concave structure are respectively located between the ball groove and the sealing ring grooves on both sides.
5. The wear-resistant bearing for a long slide rail of a car seat according to claim 4, characterized in that: The plastic layer is made of PEEK material.
6. The wear-resistant bearing for a long slide rail of a car seat according to claim 5, characterized in that: The radius of the arc-shaped cross-section of the first concave structure and the second concave structure is greater than the depth thereof.
7. The wear-resistant bearing for a long slide rail of a car seat according to claim 6, characterized in that: The radius of the first concave structure and the second concave structure is 0.4±0.02 mm, and the depth is 0.35±0.05 mm.
8. The wear-resistant bearing for a long slide rail of a car seat according to claim 7, characterized in that: The extension length of the extension portion is 1.1 mm to 1.3 mm.
9. The wear-resistant bearing for a long slide rail of a car seat according to claim 8, characterized in that: The outer diameter of the bearing outer ring is 14.992 mm to 15 mm, and the height is 4.88 mm to 5 mm. After being coated with the plastic layer, the outer diameter of the bearing is 18.9 mm to 19.1 mm, and the height is 6.85 mm to 7.15 mm.