Self-lubricating spherical bearing curing fixture and its bearing

Abstract

This invention provides a self-lubricating spherical plain bearing curing fixture and bearing thereof in the field of spherical plain bearing technology. The fixture includes an open race, a screw, and a wedge. The wedge has a threaded hole, and one end of the screw has a thread with a fastening nut screwed onto it. The wedge is slidably positioned at the opening of the open race, with the screw located inside the race. One end of the screw is screwed into the wedge, and the other end abuts against the inner wall of the open race. The fastening nut engages with the threaded hole, and the screw's position can be adjusted left and right using the fastening nut. Rotating the screw adjusts the position of the wedge embedded in the open race, thereby changing the diameter of the self-lubricating spherical plain bearing curing fixture. This invention, by adjusting the size and position of the wedge, effectively ensures full fit and sufficient loading force during curing of the gasket. It is reusable, simple, and easy to implement, and can meet the loading force and demolding requirements during curing of different types of fabric-lined self-lubricating spherical plain bearings.

Description

Technical Field

[0001] This invention relates to the field of spherical plain bearing technology, and more specifically, to a self-lubricating spherical plain bearing curing fixture and the bearing thereof. Background Technology

[0002] Fabric-lined self-lubricating spherical plain bearings are maintenance-free and simple in structure. Due to their low coefficient of friction, excellent wear resistance, and high load-bearing capacity, they are widely used in transportation, mining machinery, aerospace, and other fields. They consist of an outer steel ring, an inner steel ring, and a self-lubricating pad adhered to the inner surface of the outer steel ring for lubrication. The self-lubricating pad is a composite material made of fabric-reinforced resin prepreg. The pad curing process is one of the key technologies in the manufacturing of self-lubricating spherical plain bearings, directly determining the final quality and friction and wear performance of the bearing.

[0003] The curing process of self-lubricating spherical plain bearings is as follows: A self-lubricating gasket is bonded to the inner surface of the bearing outer ring using a specific adhesive. A curing fixture applies pressure to the gasket, which is then placed in a high-temperature environment. The curing process is completed through two curing stages: pre-curing and final curing. During pre-curing, the curing temperature is low, and the curing fixture plays its primary role at this stage. After pre-curing, the curing fixture needs to be removed, and the gasket must be assembled with the inner and outer rings of the bearing through compression before final curing. Final curing does not require additional curing fixtures. Therefore, the curing fixture not only needs to provide a radially uniform loading force at high temperatures but also needs to have a certain demolding capability. Traditional curing processes often use a cylindrical mandrel, utilizing the principle of thermal expansion and contraction to provide the curing loading force and achieve demolding. Different types of gaskets require different curing loading forces. The existing curing process has a problem: relying solely on the material's expansion force at high temperatures is insufficient to meet the curing loading force requirements of all gaskets. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a self-lubricating spherical bearing curing fixture and the bearing thereof.

[0005] According to the present invention, a self-lubricating spherical bearing curing fixture includes an open race, a screw, and a wedge. The wedge has a threaded hole, and one end of the screw has a thread with a fastening nut screwed onto the thread. The wedge is slidably disposed at the opening of the open race, and the screw is located inside the open race. One end of the screw is screwed into the wedge, and the other end of the screw abuts against the inner wall of the open race. The fastening nut is fitted with the threaded hole, and the position of the screw can be adjusted left and right by the fastening nut.

[0006] The self-lubricating spherical bearing curing fixture is provided with a self-lubricating gasket on its periphery, and the self-lubricating gasket is used to adhere to the inner surface of the outer ring of the bearing.

[0007] The diameter of the self-lubricating spherical bearing curing fixture is changed by rotating the screw to adjust the position of the wedge embedded in the open collar.

[0008] In some implementations, the other end face of the screw is configured as a spherical surface.

[0009] In some embodiments, the wedge is configured as a trapezoid, with the narrow end of the wedge being a curved surface, which, when combined with the open collar, forms a complete ring.

[0010] In some embodiments, the wider end of the wedge is set as a plane, and the threaded hole is provided at the middle position of the plane.

[0011] In some embodiments, the thickness of the wedge is the same as the thickness of the open collar, and the width of the wedge is greater than the width of the opening of the open collar, so as to ensure that when the wedge and the open collar are fully engaged, the open collar is in an outwardly flared state.

[0012] In some embodiments, the open collar is configured as a cylindrical structure, the open collar including an outer ring, the surface of which is provided with a coating.

[0013] In some embodiments, the open collar further includes an inner ring, the surface of which is provided with a positioning groove, which is correspondingly engaged with the other end of the screw.

[0014] In some embodiments, the coating is made of polymer, inorganic materials, or a composite coating for curing and demolding.

[0015] A bearing, using the aforementioned self-lubricating spherical bearing curing fixture.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention, by adjusting the size and position of the wedge, can effectively ensure that the gasket adheres fully during curing, has sufficient loading force, and can be reused. It is simple and easy to implement, and therefore can meet the loading force and demolding requirements of different types of fabric-lined self-lubricating spherical bearings during curing. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the self-lubricating spherical bearing curing fixture of the present invention;

[0020] Figure 2 This is an assembly diagram of the curing process for the self-lubricating spherical bearing curing fixture of the present invention.

[0021] Figure label:

[0022] Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0024] Example 1

[0025] like Figure 1-2 As shown, the present invention includes an open collar 11, a screw 13, and a wedge 12. The wedge 12 has a threaded hole, and one end of the screw 13 has a thread with a fastening nut 131 screwed onto the thread. The wedge 12 is slidably disposed at the opening of the open collar 11. The screw 13 is located inside the open collar 11, with one end screwed into the wedge 12 and the other end abutting against the inner wall of the open collar 11. The fastening nut 131 is fitted into the threaded hole, and the position of the screw 13 can be adjusted left and right using the fastening nut 131. A self-lubricating spherical bearing curing fixture 1 has a self-lubricating gasket 2 surrounding it. The self-lubricating gasket 2 is used to adhere to the inner surface of the bearing outer ring 3. By rotating the screw 13, the position of the wedge 12 embedded in the open collar 11 is adjusted, thereby changing the diameter of the self-lubricating spherical bearing curing fixture 1.

[0026] The other end face of the screw 13 is spherical. The wedge 12 is trapezoidal, with its narrow end curved, forming a complete ring when it mates with the open collar 11. The wider end of the wedge 12 is flat, with a threaded hole in the middle. The thickness of the wedge 12 is the same as the thickness of the open collar 11, and the width of the wedge 12 is greater than the width of the opening of the open collar 11, ensuring that the open collar 11 is in an outwardly expanded state when the wedge 12 and the open collar 11 are fully engaged. The open collar 11 is cylindrical, including an outer ring 111 with a coating 1111 on its surface. The open collar 11 also includes an inner ring 112 with a positioning groove 1121 on its surface, which corresponds to and mates with the other end of the screw 13. The coating 1111 is made of polymer, inorganic material, or a composite coating for curing and demolding.

[0027] A bearing, the outer ring of which is cured by applying a self-lubricating spherical bearing curing fixture 1 and a self-lubricating gasket 2.

[0028] Working principle:

[0029] First, use adhesive to bond the self-lubricating gasket 2 to the inner surface of the bearing outer ring 3, and then fit the bearing outer ring 3 with the self-lubricating gasket 2 attached onto the open race 11. Next, screw the screw 13 with the fastening nut 131 to the deepest point of the threaded hole of the wedge 12, and then install the wedge 12 into the opening of the open race 11. Use a wrench to screw the screw 13 outwards from the threaded hole of the wedge 12 until the right end face of the screw 13 presses against the positioning groove 1121. Continue screwing the screw 13 until the curved surface of the wedge 12 and the open race 11 form a complete cylindrical surface on the outer side. At this point, tighten the fastening nut 131 to the left to lock the relative position of the screw 13 and the wedge 12. Then, place the bearing outer ring 3 and the self-lubricating spherical bearing curing fixture 1 together in a high-temperature environment for pre-curing. After pre-curing, loosen the fastening nut 131, tighten the screw 13 to the left, remove the wedge 12, and then remove the open race 11.

[0030] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A self-lubricating spherical bearing curing fixture, comprising an open ring (11), a screw (13), and a wedge (12), wherein the wedge (12) is provided with a threaded hole, one end of the screw (13) is provided with a thread, and a fastening nut (131) is screwed onto the thread, the wedge (12) is slidably disposed at the opening of the open ring (11), the screw (13) is located inside the open ring (11), one end of the screw (13) is screwed into the wedge (12), and the other end of the screw (13) abuts against the inner wall of the open ring (11), the fastening nut (131) is fitted with the threaded hole, and the position of the screw (13) is adjusted left and right by the fastening nut (131); The self-lubricating spherical bearing curing fixture (1) is provided with a self-lubricating pad (2) on its periphery. The self-lubricating pad (2) is used to adhere to the inner surface of the outer ring (3) of the bearing. The diameter of the self-lubricating spherical bearing curing fixture (1) is changed by adjusting the position of the wedge (12) embedded in the open collar (11) by rotating the screw (13); The other end face of the screw (13) is set as a spherical surface; The wedge (12) is set in a trapezoidal shape, and the narrow end of the wedge (12) is set as a curved surface. The curved surface and the open collar (11) are matched to form a complete ring. The thickness of the wedge (12) is the same as the thickness of the open collar (11), and the width of the wedge (12) is greater than the width of the opening of the open collar (11), so as to ensure that when the wedge (12) and the open collar (11) are fully engaged, the open collar (11) is in an outward expansion state.

2. The self-lubricating spherical bearing curing fixture according to claim 1, characterized in that, The wider end of the wedge (12) is set as a plane, and the threaded hole is set at the middle position of the plane.

3. The self-lubricating spherical bearing curing fixture according to claim 1, characterized in that, The open collar (11) is configured as a cylindrical structure, and the open collar (11) includes an outer ring (111), and a coating (1111) is provided on the surface of the outer ring (111).

4. The self-lubricating spherical bearing curing fixture according to claim 1, characterized in that, The open collar (11) also includes an inner ring (112), and a positioning groove (1121) is provided on the surface of the inner ring (112), which is correspondingly matched with the other end of the screw (13).

5. The self-lubricating spherical bearing curing fixture according to claim 3, characterized in that, The coating (1111) is made of polymer, inorganic materials or composite coating for curing and demolding.

6. A bearing, characterized in that, Apply the self-lubricating spherical bearing curing fixture according to any one of claims 1-5.

Images