Rolling-sliding composite angular contact self-lubricating knuckle bearing
By adopting a rolling composite structure and self-lubricating pad in angular contact joint bearings, combined with arc-shaped mating surface and sealing ring, the friction problem of existing angular contact bearings under high load and rotational flexibility is solved, and low friction is achieved , self-lubricating and sealing effects simplify maintenance and improve service life.
Patent Information
- Application Number
- CN202411567045.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-01-14
AI Technical Summary
Existing angular contact joint bearings have large starting friction torque when bearing axial and radial combined loads, and are complex in maintenance and high maintenance costs, making it difficult to meet the bearing requirements in high loads and rotational flexibility.
A rolling and sliding composite angular contact self-lubricating joint bearing is designed, adopting a combined structure of inner ring, outer ring, rolling element, cage and self-lubricating pad. Through the rolling and sliding composite motion form, the arc-shaped mating surface and seal are combined. The ring achieves low friction, self-lubricating and sealing effects, and guides the rolling element to roll on the correct raceway through the cage to avoid stagnation.
Low friction, self-lubricating and sealing performance under axial and radial loads is achieved, reducing the starting friction torque, simplifying the maintenance process, reducing maintenance costs, and improving the operation flexibility and service life of the bearing.
Smart Images
Figure CN119308931A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of bearings, and in particular relates to a rolling-sliding composite angular contact self-lubricating spherical bearing. Background Art
[0002] Spherical bearings are mainly composed of an inner ring with a convex outer spherical surface and an outer ring with a concave inner spherical surface, and can withstand large loads. However, angular contact spherical bearings can withstand certain radial loads and unidirectional axial loads, as well as axial and radial combined loads. Existing angular contact spherical bearings are composed of an inner ring, an outer ring, and a self-lubricating liner. Since they use curved surface contact and the contact form is sliding friction, the contact area is large during swinging, resulting in a large starting friction torque and prone to jamming. For occasions with large axial loads and good rotation flexibility, this structure is difficult to meet the use requirements.
[0003] To address the above problems, the low friction characteristics of rolling bearings and the high load-bearing capacity of sliding bearings are combined through reasonable structural design to solve the shortcomings of low load-bearing capacity of rolling bearings, large starting friction torque of sliding bearings, and the need to disassemble the entire bearing for repair after the rolling elements and retainers of angular contact bearings are damaged, which leads to difficult maintenance work and high maintenance costs. Summary of the invention
[0004] In view of the defects in the prior art, the object of the present invention is to provide a rolling-sliding composite angular contact self-lubricating spherical plain bearing.
[0005] The rolling-sliding composite angular contact self-lubricating spherical bearing provided by the present invention comprises: an inner ring 1, a self-lubricating liner 2, an outer ring 3, a sealing ring 4, a rolling element 5, and a retaining frame 6;
[0006] The inner ring 1 is sleeved in the outer ring 3;
[0007] The rolling element 5 is located between the raceways of the inner ring 1 and the outer ring 3, and is guided by the cage 6 to roll on the correct raceway;
[0008] The inner spherical surface of the outer ring 3 is partially bonded with a self-lubricating liner 2 to form a pair of sliding mating surfaces with the inner ring 1; the inner spherical surface of the outer ring 3 is partially processed with two sealing grooves and equipped with two sealing rings 4;
[0009] The outer spherical surface of the inner ring 1 is convex, and the inner spherical surface of the outer ring 3 is concave. The radians of the convexity of the inner ring 1 and the concaveity of the outer ring 3 are not equal.
[0010] Preferably, the convex curvature of the outer spherical surface of the inner ring 1 is smaller than the concave degree of the inner spherical surface of the outer ring 3 .
[0011] Preferably, the outer spherical surface of the inner ring 1 is a convex arc surface, and the inner spherical surface of the outer ring 3 is a concave arc surface;
[0012] A layer of self-lubricating liner 2 is bonded on the concave arc surface of the outer ring 3 close to the end surface by high temperature curing after sandblasting.
[0013] Preferably, the self-lubricating pad 2 is woven from Nomex fibers and PTFE fibers.
[0014] Preferably, the sealing ring 4 is made of rubber material.
[0015] Preferably, a cage 6 is provided between the rolling elements 5 .
[0016] Preferably, each row of the retaining frame 6 is processed with a plurality of pockets, and the number of the rolling bodies 5 evenly distributed on the retaining frame 6 corresponds one to one to the number of the plurality of pockets.
[0017] Preferably, the self-lubricating liner 2 has an operating temperature range of -54°C to +163°C, a thickness of 0.38 to 0.42 mm, and is in contact with the outer spherical surface of the inner ring 1 .
[0018] Preferably, the inner ring 1 , the outer ring 3 , the rolling elements 5 and the retaining frame 5 are all made of stainless steel.
[0019] Compared with the prior art, the present invention has the following beneficial effects:
[0020] 1. The present invention adopts a rolling and sliding composite motion structure to enable it to have a certain axial and radial load-bearing capacity, and has the ability of self-lubrication, low friction, and good sealing. A raceway is provided on the outer ring at the position corresponding to the rolling element, realizing an angular contact structure, which can bear axial and radial loads at the same time. When in use, the rolling element and the inner and outer rings form two pairs of rolling contact surfaces. A layer of self-lubricating gasket is bonded on the concave arc inner spherical surface of the outer ring close to the end face through high-temperature curing, forming a pair of sliding contact surfaces with the inner ring. When subjected to axial and radial loads, the rolling contact surface and the sliding contact surface jointly support the load-bearing capacity. Compared with traditional spherical bearings, rolling friction contact is carried out through rolling elements, which reduces the starting friction torque of the bearing. When wear is caused by long-term use, only some severely worn rolling elements need to be replaced to reduce maintenance costs.
[0021] 2. The present invention processes two sealing grooves locally on the inner spherical surface of the outer ring, and seal rings for sealing the fitting gap between the inner and outer rings are installed in the two sealing grooves. The seal rings have good sealing performance under certain working environments and can prevent dust and other impurities from entering the fitting gap between the inner and outer rings to affect the operating flexibility.
[0022] 3. The rolling mating surface between the inner ring and the outer ring of the present invention is an arc-shaped mating surface, the outer spherical surface of the inner ring is convex, and the inner spherical surface of the outer ring is concave, and the curvatures of the inner ring convex and the outer ring concave of the rolling mating surface are not equal, which is manifested in that the curvature of the inner ring convex is smaller than the curvature of the outer ring concave; this structure enables the bearing to have a certain self-aligning effect when it is subjected to radial and axial combined loads, and can improve the operating flexibility between the inner and outer rings and the rolling elements, avoid jamming of the mating surface, and the present invention guides the rolling elements to roll on the correct raceway through the retaining frame, avoiding collision between two adjacent rolling elements. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:
[0024] Figure 1 It is a schematic structural diagram of the rolling-sliding compound angular contact self-lubricating spherical plain bearing of the present invention.
[0025] The figure shows
[0026] Inner ring 1 Sealing ring 4
[0027] Self-lubricating liner 2 Rolling element 5
[0028] Outer ring 3 Cage 6 DETAILED DESCRIPTION
[0029] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0030] The present invention provides a rolling-sliding composite angular contact self-lubricating spherical bearing, which is mainly composed of an inner ring 1, a self-lubricating liner 2, an outer ring 3, a sealing ring 4, a rolling body 5, and a retaining frame 6. The rolling-sliding composite angular contact self-lubricating spherical bearing has a pair of sliding contact surfaces and two pairs of rolling contact surfaces.
[0031] As the instruction manual Figure 1 As shown: the inner ring 1 is inserted into the outer ring 3, and the inner spherical surface of the outer ring 3 is partially bonded with a self-lubricating liner 2 to form a pair of sliding fitting surfaces with the inner ring 1; two sealing grooves are locally processed on the inner spherical surface of the outer ring 3 and two sealing rings 4 are installed; the rolling body 5 is located between the raceways of the inner ring 1 and the outer ring 3, and is guided by the retaining frame 6 to roll on the correct raceway, forming a total of two pairs of rolling contact surfaces with the convex outer spherical surface of the inner ring 1 and the concave inner spherical surface of the outer ring 3.
[0032] In this embodiment, the outer spherical surface of the inner ring 1 is convex, and the inner spherical surface of the outer ring 3 is concave. The curvature of the convexity of the inner ring 1 and the concaveness of the outer ring 3 are not equal, which is specifically manifested in that the curvature of the convexity of the outer spherical surface of the inner ring is smaller than the degree of concaveness of the inner spherical surface of the outer ring. This structure can make the bearing have a certain self-aligning effect when it bears radial and axial combined loads, make the movement between the inner and outer rings more flexible, avoid the occurrence of jamming, and improve the stability of the fit between the inner and outer rings.
[0033] The concave inner spherical surface of the outer ring near the end face is sandblasted and bonded with a layer of self-lubricating PTFE fabric liner.
[0034] In this embodiment, the inner spherical surface of the outer ring 3 is partially bonded with a self-lubricating pad 2, specifically, a layer of self-lubricating pad is bonded on the concave arc inner spherical surface of the outer ring near the end face through sandblasting and high-temperature curing. The self-lubricating pad 2 is mainly woven from Nomex fiber and PTFE fiber, bonded by special glue, and can be firmly adhered to the inner spherical surface of the outer ring after high-temperature curing, so that the rolling and sliding composite angular contact self-lubricating spherical bearing has the ability of self-lubrication and low friction on the basis of its bearing capacity; the self-lubricating pad 2 has an operating temperature range of -54℃~+163℃, a thickness of 0.38~0.42mm, and contacts the outer spherical surface of the inner ring; that is, a composite material layer is partially arranged between the outer ring 3 and the inner ring 1 of the rolling and sliding composite angular contact self-lubricating spherical bearing, and the composite material layer is a polytetrafluoroethylene layer, which has the characteristics of low friction, self-lubrication and maintenance-free.
[0035] In this embodiment, two sealing grooves are locally processed on the inner spherical surface of the outer ring 3. The two sealing grooves are equipped with sealing rings 4 for sealing the fitting gap between the inner ring 1 and the outer ring 4. The sealing ring 4 is made of rubber material to prevent lubricant leakage and avoid dust and other impurities entering the fitting gap between the inner ring 1 and the outer ring 3 to cause the inner ring 1 and the outer ring 3 to move stuck, thereby sealing the bearing.
[0036] In this embodiment, a retaining frame 6 is arranged between the rolling elements 5. This arrangement can not only isolate the rolling elements 4, but also guide the rolling elements 5 to roll on the correct raceway through the retaining frame 6, thereby avoiding collision and friction between the rolling elements 4 and preventing the rolling elements 4 from falling off.
[0037] Furthermore, each row of the retaining frame 6 is processed with a plurality of pockets, and the number of rolling elements 5 evenly distributed on the retaining frame 6 corresponds one to one with the number of the plurality of pockets; more specifically, each row of the retaining frame 6 is processed with 3 pockets, 36 pockets are evenly distributed on the circumference, and 36 evenly distributed rolling elements 5 are installed on the retaining frame 6.
[0038] The inner ring 1, the outer ring 3, the rolling element 5 and the retaining frame 5 are all made of stainless steel and have a certain corrosion resistance.
[0039] The bearing of the present invention adopts a special structure to enable it to have certain axial and radial load-bearing capacity, and at the same time, it has the ability of self-lubrication, low friction, and good sealing. The inner spherical surface of the outer ring is partially bonded with a self-lubricating liner, and partially contacts and cooperates with the inner ring through rolling elements, which greatly improves the lubrication performance of the bearing spherical surface. The rolling-sliding composite contact form solves the shortcomings of the existing rolling bearing with low load-bearing capacity and the large starting friction torque of the sliding bearing, thereby increasing the service life of the bearing.
[0040] The rolling-sliding composite angular contact self-lubricating spherical bearing of the present invention has a simple structure. It adopts a rolling and sliding composite motion structure to enable it to have a certain axial and radial load-bearing capacity, and has the ability of self-lubrication, low friction, and good sealing. A raceway is provided on the outer ring at the position corresponding to the rolling element, realizing an angular contact structure, which can withstand axial and radial loads at the same time. When in use, the rolling element and the inner and outer rings form two pairs of rolling contact surfaces. A layer of self-lubricating gasket is bonded on the concave arc inner spherical surface of the outer ring close to the end face through high-temperature curing, forming a pair of sliding contact surfaces with the inner ring. When subjected to axial and radial loads, the rolling contact surface and the sliding contact surface jointly support the load-bearing capacity. Compared with traditional spherical bearings, rolling friction contact is carried out through rolling elements, which reduces the starting friction torque of the bearing. When wear is caused by long-term use, only some severely worn rolling elements need to be replaced, thereby reducing maintenance costs.
[0041] Two sealing grooves are processed locally on the inner spherical surface of the outer ring. The two sealing grooves are equipped with sealing rings for sealing the fitting gap between the inner and outer rings. They have good sealing performance under certain working conditions and can prevent dust and other impurities from entering the fitting gap between the inner and outer rings and affecting the operating flexibility.
[0042] The rolling mating surface between the inner and outer rings is an arc-shaped mating surface, the outer spherical surface of the inner ring is convex, and the inner spherical surface of the outer ring is concave, and the curvatures of the inner ring convex and the outer ring concave of the rolling mating surface are not equal, and the curvature of the inner ring convex is smaller than the concave curvature of the outer ring; this structure enables the bearing to have a certain self-aligning effect when it bears radial and axial combined loads, and can improve the running flexibility between the inner and outer rings and rolling elements, and avoid the jamming phenomenon of the mating surface. The cage guides the rolling element to roll on the correct raceway to avoid collision between two adjacent rolling elements.
[0043] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0044] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.
Claims
1. A rolling and sliding composite angular contact self-lubricating spherical bearing, characterized in that: include: Inner ring (1), self-lubricating liner (2), outer ring (3), sealing ring (4), rolling element (5), retaining frame (6); The inner ring (1) is sleeved in the outer ring (3); The rolling element (5) is located between the raceways of the inner ring (1) and the outer ring (3), and is guided by the cage (6) to roll on the correct raceway; The inner spherical surface of the outer ring (3) is partially bonded with a self-lubricating liner (2) to form a pair of sliding mating surfaces with the inner ring (1); the inner spherical surface of the outer ring (3) is partially processed with two sealing grooves and equipped with two sealing rings (4); The outer spherical surface of the inner ring (1) is convex, and the inner spherical surface of the outer ring (3) is concave. The radians of the convexity of the inner ring (1) and the concaveity of the outer ring (3) are not equal.
2. The rolling and sliding composite angular contact self-lubricating spherical plain bearing according to claim 1, characterized in that: The convex curvature of the outer spherical surface of the inner ring (1) is smaller than the concave degree of the inner spherical surface of the outer ring (3).
3. The rolling-sliding composite angular contact self-lubricating spherical plain bearing according to claim 1, characterized in that: The outer spherical surface of the inner ring (1) is a convex arc surface, and the inner spherical surface of the outer ring (3) is a concave arc surface; A layer of self-lubricating liner (2) is bonded on the concave arc surface of the outer ring (3) close to the end surface by high-temperature curing after sandblasting.
4. The rolling-sliding composite angular contact self-lubricating spherical plain bearing according to claim 3, characterized in that: The self-lubricating liner (2) is woven from Nomex fibers and PTFE fibers.
5. The rolling-sliding composite angular contact self-lubricating spherical plain bearing according to claim 1, characterized in that: The sealing ring (4) is made of rubber material.
6. The rolling-sliding composite angular contact self-lubricating spherical plain bearing according to claim 1, characterized in that: A retaining frame (6) is arranged between the rolling elements (5).
7. The rolling-sliding composite angular contact self-lubricating spherical plain bearing according to claim 6, characterized in that: Each row of the retaining frame (6) is processed with a plurality of pockets, and the number of rolling bodies (5) evenly distributed on the retaining frame (6) corresponds one to one to the number of the plurality of pockets.
8. The rolling-sliding composite angular contact self-lubricating spherical plain bearing according to claim 1, characterized in that: The self-lubricating liner (2) has an operating temperature range of -54°C to +163°C, a thickness of 0.38 to 0.42 mm, and is in contact with the outer spherical surface of the inner ring (1).
9. The rolling-sliding composite angular contact self-lubricating spherical plain bearing according to claim 1, characterized in that: The inner ring (1), the outer ring (3), the rolling element (5) and the retaining frame (6) are all made of stainless steel.