Self-lubricating knuckle bearing extrusion forming machining method and self-lubricating knuckle bearing

Abstract

The self-lubricating joint bearing extrusion forming machining method comprises the following steps that S1, a bearing inner ring, a bearing outer ring, a first hemispherical gasket and a second hemispherical gasket are prefabricated; S2, a first self-lubricating gasket and a second self-lubricating gasket are constructed on the inner surface of the first hemispherical gasket and the inner surface of the second hemispherical gasket correspondingly; s3, the first hemispherical gasket and the second hemispherical gasket are correspondingly spliced and arranged on the outer spherical surface of the bearing inner ring in a sleeving mode; s4, the outer surfaces of the first hemispherical gasket and the second hemispherical gasket and / or the inner surface of the bearing inner ring are / is coated with an adhesive; and S5, the bearing outer ring is subjected to extrusion forming machining, so that the bearing outer ring and the bearing inner ring are assembled together. In the extrusion assembly process of the bearing outer ring, only the bearing outer ring is bent and deformed, the first self-lubricating gasket and the second self-lubricating gasket are basically not pressed and deformed, and the problem that cracks are generated due to the fact that the self-lubricating gaskets are pressed and deformed is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to an extrusion molding processing method for a self-lubricating spherical plain bearing and a self-lubricating spherical plain bearing. Background Art

[0002] Molded pads are a new type of self-lubricating pads. Due to their machinability, self-lubricating and high-load characteristics, they have been applied to bushings and some spherical bearings. However, due to their slightly poor deformation resistance, large bending deformations can easily cause cracks in the molded pad layer. Chinese document CN105499298A (application date: February 18, 2016) discloses a self-lubricating spherical bearing extrusion molding die and process, and Chinese document CN109798304A (application date: January 8, 2019) discloses an integral self-lubricating spherical bearing device and its closing forming method. In the above two prior art solutions, the self-lubricating pads are pre-set on the inner surface of the outer ring of the bearing, and then the outer ring of the bearing is extruded and molded so that the outer ring of the bearing is bent together with the self-lubricating pad to fit on the outer spherical surface of the inner ring of the bearing. The self-lubricating pad is prone to crack defects during the synchronous bending of the outer ring of the bearing, thereby affecting the quality of the bearing product. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a self-lubricating spherical plain bearing extrusion molding processing method, which mainly solves the technical problem that the molded self-lubricating liner integrally connected to the inner spherical surface of the outer ring of the self-lubricating spherical plain bearing in the prior art is prone to crack defects due to bending deformation during the extrusion molding process.

[0004] To achieve the above object, the present invention is achieved through the following technical solutions: A self-lubricating spherical bearing extrusion molding processing method comprises the following steps: S1, prefabricate the bearing inner ring, the bearing outer ring, the first hemispherical washer and the second hemispherical washer according to the design requirements, the first hemispherical washer and the second hemispherical washer are spliced ​​to form an inner spherical washer structure, and the inner spherical washer structure is adapted to the inner spherical surface of the bearing outer ring formed after the bearing outer ring is extruded; S2, constructing a first self-lubricating pad and a second self-lubricating pad integrally connected to the inner surfaces of the first hemispherical washer and the second hemispherical washer on the inner surfaces of the first hemispherical washer and the second hemispherical washer on the inner surfaces of the side corresponding to the outer spherical surface of the inner ring of the bearing; S3, correspondingly assembling and sleeve the first hemispherical washer and the second hemispherical washer on the outer spherical surface of the inner ring of the bearing, and making the first self-lubricating liner and the second self-lubricating liner fit closely to the outer spherical surface of the inner ring of the bearing; S4, applying adhesive to the outer surfaces of the first hemispherical washer and the second hemispherical washer and / or the inner surface of the bearing inner ring; S5, after pre-aligning the bearing outer ring and the bearing inner ring, the bearing outer ring is extruded to form an inner spherical surface structure of the bearing outer ring that fits the outer surfaces of the first hemispherical washer and the second hemispherical washer. After the adhesive is cured, the first hemispherical washer and the second hemispherical washer are integrally connected with the inner spherical surface of the bearing outer ring of the bearing, and the first self-lubricating pad and the second self-lubricating pad cooperate with the outer spherical surface of the bearing inner ring to form a friction pair.

[0005] Furthermore, the first self-lubricating pad and the second self-lubricating pad are both polymer material molded pad structures.

[0006] Furthermore, in step S2, the inner surfaces of the first hemispherical washer and the second hemispherical washer are first sandblasted to form a rough surface structure on the corresponding inner surfaces, and then a polymer material for forming a self-lubricating pad is sprayed on the inner surfaces of the first hemispherical washer and the second hemispherical washer after the sandblasting. After curing and machining, the first self-lubricating pad and the second self-lubricating pad with uniform thickness and matched with the outer spherical surface of the inner ring of the bearing are respectively integrally formed on the inner surfaces of the first hemispherical washer and the second hemispherical washer.

[0007] Furthermore, the adhesive is epoxy resin.

[0008] Furthermore, the first hemispherical gasket and the second hemispherical gasket are both gasket structures made of stainless steel.

[0009] Furthermore, the inner spherical washer structure formed by splicing the first hemispherical washer and the second hemispherical washer is a structure split into upper and lower halves, and the splicing position of the first hemispherical washer and the second hemispherical washer corresponds to the equatorial position of the outer spherical surface of the inner ring of the bearing.

[0010] Based on the same inventive concept, the present invention also provides a self-lubricating spherical plain bearing, which is produced according to any of the above-mentioned self-lubricating spherical plain bearing extrusion molding processing methods.

[0011] The above technical solution has the following advantages or beneficial effects:

[0012] In the self-lubricating spherical bearing extrusion molding processing method and the self-lubricating spherical bearing described in the present invention, the first hemispherical washer and the second hemispherical washer are used to form the first self-lubricating pad and the second self-lubricating pad and are pre-tightly fitted on the outer spherical surface of the bearing inner ring, and adhesive is applied to the outer surfaces of the first hemispherical washer and the second hemispherical washer and / or the inner surface of the bearing outer ring. When the bearing outer ring is extruded to be assembled with the bearing inner ring, since the first self-lubricating pad on the first hemispherical washer and the second self-lubricating pad on the second hemispherical washer have been pre-tightly fitted on the outer spherical surface of the bearing inner ring, during the extrusion and assembly process, only the bearing outer ring will be bent and deformed, and the first hemispherical washer and the second hemispherical washer together with the first self-lubricating pad and the second self-lubricating pad will basically not be compressed and deformed, effectively avoiding the problem of cracks caused by compression deformation of the self-lubricating pads. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of a self-lubricating spherical plain bearing according to an embodiment of the present invention.

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure decomposition of the self-lubricating spherical plain bearing according to an embodiment of the present invention.

[0015] Figure 3 It is a structural cross-sectional view of a self-lubricating spherical plain bearing according to an embodiment of the present invention.

[0016] Figure 4 It is a schematic diagram of the assembly structure of the self-lubricating spherical plain bearing before extrusion molding according to an embodiment of the present invention.

[0017] Figure 5 It is a cross-sectional view of the assembly structure of the self-lubricating spherical plain bearing before extrusion molding according to an embodiment of the present invention.

[0018] Description of labels:

[0019] 1. Bearing inner ring, 2. Bearing outer ring, 3. First hemispherical washer, 4. Second hemispherical washer, 5. First self-lubricating gasket, 6. Second self-lubricating gasket. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] Please refer to the attached Figure 1 To Attachment Figure 5 An embodiment of the present invention provides a self-lubricating spherical bearing extrusion molding processing method, comprising the following steps: S1, prefabricating a bearing inner ring 1, a bearing outer ring 2, a first hemispherical washer 3 and a second hemispherical washer 4 according to design requirements, and the first hemispherical washer 3 and the second hemispherical washer 4 are spliced ​​together to form an inner spherical washer structure, and the inner spherical washer structure is adapted to the inner spherical surface of the bearing outer ring formed after the bearing outer ring 2 is extruded; S2, constructing a first self-lubricating liner 5 and a second self-lubricating liner 6 integrally connected to the inner surfaces of the first hemispherical washer 3 and the second hemispherical washer 4 on the inner surfaces of the first hemispherical washer 3 and the second hemispherical washer 4 corresponding to the outer spherical surface of the bearing inner ring 1; S3, splicing and sleeved the first hemispherical washer 3 and the second hemispherical washer 4 on the outer spherical surface of the bearing inner ring 1 and Make the first self-lubricating gasket 5 and the second self-lubricating gasket 6 fit tightly to the outer spherical surface of the bearing inner ring 1; S4, apply adhesive on the outer surfaces of the first hemispherical gasket 3 and the second hemispherical gasket 4 and / or the inner surface of the bearing outer ring 2; S5, after pre-aligning the bearing outer ring 2 with the bearing inner ring 1, perform extrusion molding on the bearing outer ring 2 (the extrusion molding process is a prior art and will not be repeated here), so that the inner surface of the bearing outer ring 2 is extruded to form a bearing outer ring inner spherical surface structure that fits the outer surfaces of the first hemispherical gasket 3 and the second hemispherical gasket 4. After the adhesive is cured, the first hemispherical gasket 3 and the second hemispherical gasket 4 are integrally connected with the bearing outer ring inner spherical surface of the bearing outer ring 2, and the first self-lubricating gasket 5 and the second self-lubricating gasket 6 cooperate with the outer spherical surface of the bearing inner ring 1 to form a friction pair. It can be understood that, in this embodiment, the first hemispherical washer 3 and the second hemispherical washer 4 are used to form the first self-lubricating liner 5 and the second self-lubricating liner 6, and they are pre-tightly fitted on the outer spherical surface of the bearing inner ring 1, and adhesive is applied to the outer surfaces of the first hemispherical washer 3 and the second hemispherical washer 4 and / or the inner surface of the bearing inner ring 1. When the bearing outer ring 2 is squeezed to be assembled with the bearing inner ring 1, the first self-lubricating liner 5 on the first hemispherical washer 3 and the second self-lubricating liner 6 on the second hemispherical washer 4 have been pre-tightly fitted on the outer spherical surface of the bearing inner ring 1. In the extrusion assembly process, only the outer ring 2 of the bearing will bend and deform, and the first hemispherical washer 3 and the second hemispherical washer 4 together with the first self-lubricating pad 5 and the second self-lubricating pad 6 will basically not be compressed and deformed, effectively avoiding the problem of cracks caused by compression deformation of the self-lubricating pads. In addition, the first hemispherical washer 3 and the second hemispherical washer 4 are integrally bonded to the inner spherical surface of the outer ring of the bearing 2 by an adhesive, so that the first self-lubricating pad 5 and the second self-lubricating pad 6 cooperate with the outer spherical surface of the inner ring 1 of the bearing to form a friction pair, thereby completing the assembly process of the bearing.

[0023] Please refer to the attached Figure 1 To Attachment Figure 5In one preferred embodiment, the first self-lubricating pad 5 and the second self-lubricating pad 6 are both polymer material molded pad structures. In this embodiment, the polymer material used to form the self-lubricating pad is a prior art, for example, a formula material for making a self-lubricating pad is disclosed in the document CN102408711A. The polymer material of this embodiment can also be selected from other polymer materials used to form molded pads in the prior art.

[0024] Please refer to the attached Figure 1 To Attachment Figure 5 In one preferred embodiment, in step S2, the inner surfaces of the first hemispherical washer 3 and the second hemispherical washer 4 are first sandblasted to form a rough surface structure on the corresponding inner surfaces, and then a polymer material for forming a self-lubricating gasket is sprayed on the inner surfaces (rough surfaces) of the first hemispherical washer 3 and the second hemispherical washer 4 after sandblasting (to improve the bonding strength between the self-lubricating gasket and the hemispherical gasket), and after curing and machining, the first hemispherical gasket 5 and the second self-lubricating gasket 6 with uniform thickness and matched with the outer spherical surface of the bearing inner ring 1 are respectively integrally formed on the inner surfaces of the first hemispherical washer 3 and the second hemispherical gasket 4.

[0025] Please refer to the attached Figure 1 To Attachment Figure 5 In one preferred embodiment, the adhesive applied to the outer surface of the first hemispherical washer 3 and the second hemispherical washer 4 and / or the inner surface of the bearing outer ring 2 is epoxy resin. In this embodiment, preferably, epoxy resin glue is applied to the outer surface of the first hemispherical washer 3 and the second hemispherical washer 4.

[0026] Please refer to the attached Figure 1 To Attachment Figure 5 In one preferred embodiment, the first hemispherical gasket 3 and the second hemispherical gasket 4 are both made of stainless steel. However, those skilled in the art should understand that in other embodiments, the first hemispherical gasket 3 and the second hemispherical gasket 4 can also be made of other metal materials with similar load-bearing capacity as stainless steel, and are not limited to stainless steel.

[0027] Please refer to the attached Figure 1 To Attachment Figure 5 In one preferred embodiment, the inner spherical gasket structure composed of the first hemispherical gasket 3 and the second hemispherical gasket 4 is a structure split in half up and down (i.e., the first hemispherical gasket 3 and the second hemispherical gasket 4 are split structures symmetrically up and down), and the splicing position of the first hemispherical gasket 3 and the second hemispherical gasket 4 corresponds to the position of the equator line of the outer spherical surface of the bearing inner ring 1. However, those skilled in the art should understand that in other embodiments, the inner spherical gasket structure can also be a left-right split structure, i.e., the first hemispherical gasket 3 and the second hemispherical gasket 4 are configured to be a left-right symmetrical split structure.

[0028] Please refer to the attached Figure 1 To Attachment Figure 5 An embodiment of the present invention also provides a self-lubricating spherical plain bearing, which is produced according to the self-lubricating spherical plain bearing extrusion molding processing method of any of the above embodiments.

[0029] As described above, the embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements do not deviate the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Claims

1. A self-lubricating spherical bearing extrusion molding method, characterized in that: The following steps are involved: S1, prefabricating a bearing inner ring (1), a bearing outer ring (2), a first hemispherical washer (3) and a second hemispherical washer (4), wherein the first hemispherical washer (3) and the second hemispherical washer (4) are assembled to form an inner spherical washer structure, and the inner spherical washer structure is adapted to the inner spherical surface of the bearing outer ring formed by extrusion molding of the bearing outer ring (2); S2, constructing a first self-lubricating gasket (5) and a second self-lubricating gasket (6) on the inner surfaces of the first hemispherical gasket (3) and the second hemispherical gasket (4) corresponding to the outer spherical surface of the bearing inner ring (1) respectively, and the first self-lubricating gasket (5) and the second self-lubricating gasket (6) are integrally connected to the inner surfaces of the first hemispherical gasket (3) and the second hemispherical gasket (4); S3, the first hemispherical washer (3) and the second hemispherical washer (4) are correspondingly assembled and mounted on the outer spherical surface of the bearing inner ring (1), and the first self-lubricating liner (5) and the second self-lubricating liner (6) are tightly fitted on the outer spherical surface of the bearing inner ring (1); S4, applying adhesive to the outer surfaces of the first hemispherical washer (3) and the second hemispherical washer (4) and / or the inner surface of the bearing outer ring (2); S5, after the bearing outer ring (2) and the bearing inner ring (1) are pre-aligned, the bearing outer ring (2) is extruded to form an inner spherical surface structure of the bearing outer ring that fits the outer surfaces of the first hemispherical washer (3) and the second hemispherical washer (4). After the adhesive is cured, the first hemispherical washer (3) and the second hemispherical washer (4) are integrally connected with the inner spherical surface of the bearing outer ring (2), and the first self-lubricating gasket (5) and the second self-lubricating gasket (6) cooperate with the outer spherical surface of the bearing inner ring (1) to form a friction pair.

2. The self-lubricating spherical plain bearing extrusion molding method according to claim 1, characterized in that: The first self-lubricating pad (5) and the second self-lubricating pad (6) are both polymer material molded pad structures.

3. The self-lubricating spherical bearing extrusion molding method according to claim 2 is characterized in that: In step S2, the inner surfaces of the first hemispherical washer (3) and the second hemispherical washer (4) are firstly sandblasted to form a rough surface structure on the corresponding inner surfaces, and then a polymer material for forming a self-lubricating gasket is sprayed on the inner surfaces of the first hemispherical washer (3) and the second hemispherical washer (4) after the sandblasting. After curing and machining, the first self-lubricating gasket (5) and the second self-lubricating gasket (6) with uniform thickness and matched with the outer spherical surface of the bearing inner ring (1) are respectively integrally formed on the inner surfaces of the first hemispherical washer (3) and the second hemispherical washer (4).

4. The self-lubricating spherical plain bearing extrusion molding method according to claim 1, characterized in that: The adhesive is epoxy resin.

5. The self-lubricating spherical plain bearing extrusion molding method according to claim 1, characterized in that: The first hemispherical washer (3) and the second hemispherical washer (4) are both washer structures made of stainless steel.

6. The self-lubricating spherical plain bearing extrusion molding method according to any one of claims 1 to 5, characterized in that: The inner spherical washer structure formed by splicing the first hemispherical washer (3) and the second hemispherical washer (4) is a structure split into upper and lower halves, and the splicing position of the first hemispherical washer (3) and the second hemispherical washer (4) corresponds to the equatorial position of the outer spherical surface of the bearing inner ring (1).

7. A self-lubricating spherical plain bearing, characterized in that: The self-lubricating spherical plain bearing is produced by the extrusion molding method according to any one of claims 1 to 6.

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