Joint bearing and mold therefor

Abstract

The application discloses a kind of joint bearing and its mould, including inner ring and outer ring, the outer wear-resistant layer is rotationally arranged on the outer surface of the inner ring, the outer surface of the outer wear-resistant layer is provided with backing;The inner surface of the inner ring is bonded with wear-resistant composite layer.The beneficial effects of the present application are: by setting up outer wear-resistant layer and backing on the outer circumferential surface, the inner ring can be pressed in without radial cutting of the outer ring, and the wear-resistant composite layer is arranged in the inner hole of the inner ring, so that the pin shaft does not need to be in direct contact with the inner ring, and the wear degree of the inner ring is reduced.

Description

Technical Field

[0001] This invention relates to the field of spherical bearing technology, and in particular to a spherical bearing and its mold. Background Technology

[0002] Bearings are a crucial component in modern machinery. Their primary functions include supporting the weight of the equipment, providing positioning, reducing friction during operation to minimize wear and tear, extending equipment lifespan, and improving rotational accuracy. Current spherical plain bearings are used in the following ways: 1. During use: a. Lubricating oil needs to be added regularly; b. During use, the seat hole and the outer ring of the bearing come into contact with each other and squeeze each other, which can easily cause damage to the seat hole and the outer ring of the bearing, resulting in the replacement of the seat hole and the bearing at the same time, resulting in high operating costs; c. The pin and the inner ring are in metal-to-metal contact, which can easily cause damage to the pin and the bearing. 2. In terms of processing technology: a. Both the inner and outer sides of the outer ring need to be processed; b. When assembling the inner and outer rings, the outer ring needs to be cut radially to break it, and then the inner ring is pressed into the outer ring by a machine, or the two ends of the outer ring are grooved to place the inner ring into the outer ring. To address this issue, we provide a spherical bearing and its mold. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a joint bearing and its mold.

[0004] The objective of this invention is achieved through the following technical solution: A spherical bearing includes an inner ring and an outer ring. The outer ring includes an outer wear-resistant layer rotatably disposed on the outer surface of the inner ring, and a backing is disposed on the outer surface of the outer wear-resistant layer. A wear-resistant composite layer is bonded to the inner surface of the inner ring.

[0005] Preferably, the wear-resistant composite layer includes a glass fiber layer bonded to the inner surface of the inner ring, and an inner wear-resistant layer is integrally formed on the inner circle of the glass fiber layer.

[0006] Preferably, the backing is made of glass fiber prepreg or carbon fiber cloth.

[0007] Preferably, both the outer wear-resistant layer and the inner wear-resistant layer are made of polytetrafluoroethylene fiber.

[0008] Preferably, the backing and the outer wear-resistant layer have the same width.

[0009] Preferably, the inner ring, the glass fiber layer, and the inner wear-resistant layer have the same width.

[0010] The present invention also discloses a spherical bearing mold, characterized in that: it includes a first outer mold and a second outer mold detachably installed with the first outer mold; a first sealing component and a second sealing component are respectively sealed and installed at both ends of the inner surface of the circle formed by the first outer mold and the second outer mold; the first outer mold, the second outer mold, the first sealing component, and the second sealing component form a receiving cavity; the spherical bearing described in any one of the above-mentioned methods is provided in the receiving cavity; an air inlet communicating with the receiving cavity is installed on the outer surface of the first outer mold or the second outer mold; an air duct located on the outer surface of the spherical bearing is provided in the receiving cavity; and the air inlet of the air duct is connected to the air inlet.

[0011] Preferably, the first sealing component includes a first limiting end cap disposed at the inner circular end of the accommodating cavity, and a core tube is disposed inside the first limiting end cap.

[0012] Preferably, the second sealing component includes a second limiting end cap disposed at the other end of the inner circle of the accommodating cavity, and a locking cover is sealed inside the second limiting end cap, the locking cover being detachably connected to the end face of the core tube.

[0013] Preferably, the inflation nozzle includes an inflation tube connected to the outer surface of the first outer mold or the second outer mold, the air outlet of the inflation tube is connected to the air inlet of the air duct, the air inlet of the inflation tube is fitted with a sealing plug, the sealing plug is provided with an air core communicating with the inside of the inflation tube, and the outer surface of the end of the air inlet of the inflation tube is provided with a fixing nut for fixing the sealing plug.

[0014] The present invention has the following advantages: 1. The present invention provides an outer wear-resistant layer and a backing on the outer circumferential surface, which eliminates the need for radial cutting of the outer ring to press the inner ring in. Furthermore, by providing a wear-resistant composite layer in the inner hole of the inner ring, the pin does not need to directly contact the inner ring, thus reducing the wear of the inner ring.

[0015] 2. The outer and inner wear-resistant layers of this invention are made of polytetrafluoroethylene fiber, thereby reducing the wear of the inner ring during rotation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the spherical bearing of the present invention.

[0017] Figure 2 This is a cross-sectional view of the spherical bearing of the present invention.

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the mold of the present invention.

[0019] Figure 4 This is a schematic cross-sectional view of the mold structure of the present invention.

[0020] Figure 5 This is a schematic diagram of the mold in the exploded state of the present invention.

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the duct of the present invention.

[0022] In the diagram, 1. Inner ring; 2. Backing; 3. Outer wear-resistant layer; 4. Fiberglass layer; 5. Inner wear-resistant layer; 6. First outer mold; 7. Second outer mold; 8. Inflation nozzle; 81. Inflation tube; 82. Sealing plug; 83. Air core; 84. Fixing nut; 9. First sealing assembly; 91. First limiting end cap; 92. Core tube; 10. Second sealing assembly; 101. First limiting end cap; 102. Locking cap; 11. Air duct; 12. Joint bearing. Detailed Implementation To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. like Figure 1 — Figure 6 The example shown.

[0024] A spherical bearing includes an inner ring 1 and an outer ring. The outer ring includes an outer wear-resistant layer 3 rotatably disposed on the outer surface of the inner ring 1, and a backing 2 is disposed on the outer surface of the outer wear-resistant layer 3. A wear-resistant composite layer is bonded and installed on the inner surface of the inner ring 1.

[0025] See Figure 1 and Figure 2 As shown, by setting an outer wear-resistant layer 3 and a backing 2 on the outer circumferential surface of the inner ring 1, it is not necessary to cut the outer ring radially to press the inner ring in. Furthermore, by setting the wear-resistant composite layer in the inner hole of the inner ring 1, the pin does not need to directly contact the inner ring, thus reducing the wear of the inner ring.

[0026] The wear-resistant composite layer includes a glass fiber layer 4 bonded to the inner surface of the inner ring 1, and an inner wear-resistant layer 5 is integrally formed on the inner circle of the glass fiber layer 4.

[0027] Glass fiber has high strength and strong mechanical strength, which enables the bearing to have a large load-bearing capacity in actual use. Before the glass fiber layer 4 is wound around the inner wear-resistant layer 5, the glass fiber layer 4 needs to be impregnated in the corresponding liquid resin. After being wound around the inner wear-resistant layer 5, it needs to be heat-cured. The size of the wear-resistant composite layer composed of glass fiber layer 4 and inner wear-resistant layer 5 is adapted to the size of the inner ring 1 by cutting. Before the assembly process with the inner ring 1, adhesive is applied to the inner circle of the inner ring 1 and the outer surface of the wear-resistant composite layer composed of glass fiber layer 4 and inner wear-resistant layer 5. The inner ring 1 and the wear-resistant composite layer are connected and fixed into one piece by the adhesive.

[0028] The backing 2 is made of glass fiber prepreg, or it can be made of carbon fiber cloth; the outer wear-resistant layer 3 and the inner wear-resistant layer 5 are both made of polytetrafluoroethylene fiber.

[0029] The backing 2 and the outer wear-resistant layer 3 have the same width; the inner ring 1, the glass fiber layer 4, and the inner wear-resistant layer 5 have the same width.

[0030] Specifically, the manufacturing process of the polytetrafluoroethylene fiber used in the outer wear-resistant layer 3 and the inner wear-resistant layer 5 can refer to the content disclosed in the existing publication number "CN116330700A" entitled "A Fiber-wound Bearing Batch Production Process", so that the outer wear-resistant layer 3 and the inner wear-resistant layer 5 have a self-lubricating function, thereby reducing the friction during use.

[0031] Before the outer wear-resistant layer 3 and backing 2 are installed on the outer surface of the inner ring 1, a release agent needs to be applied to the outer surface of the inner ring 1. Then, a ring cut to fit the shape of the inner ring 1 is placed on the outer surface of the inner ring 1 coated with the film agent. Then, the backing 2, made of glass fiber prepreg or carbon fiber cloth, is stacked on the surface of the outer wear-resistant layer 3 according to the size of the inner ring 1 to a certain thickness, so as to be able to withstand a large load.

[0032] Next, the inner ring with the outer wear-resistant layer 3 and the backing 2 is placed into the mold described below and cured so that the outer wear-resistant layer 3 and the backing 2 are fully bonded. After the bonding is completed, due to the release agent, the inner ring 1 and the outer wear-resistant layer 3 do not stick together, so that the inner ring 1 and the outer wear-resistant layer 3 can move relative to each other.

[0033] The fiberglass layer 4 is impregnated in liquid resin, and then the fiberglass layer 4 is wound around the outer surface of the inner wear-resistant layer 5. The fiberglass layer 4 and the inner wear-resistant layer 5 are bonded together by heating and curing. After the outer ring, consisting of the outer wear-resistant layer 3 and the backing 2, is installed with the inner ring 1, an adhesive is applied to the inner circle of the inner ring 1 and the outer surface of the wear-resistant composite layer. Then, the wear-resistant composite layer, consisting of the combined glass fiber layer 4 and the inner wear-resistant layer 5, is bonded to the inner circle of the inner ring 1. At this time, the glass fiber layer 4 is located between the inner wear-resistant layer 5 and the inner ring 1.

[0034] By installing the outer wear-resistant layer 3 and the backing 2 with the inner ring 1 in the mold described below, it is not necessary to radially disconnect the outer ring and then press the inner ring into the outer ring by a machine. This is more convenient and faster than the existing manufacturing process. Furthermore, the outer wear-resistant layer 3 and the backing 2 on the outer surface of the inner ring 1 of this application can prevent wear on the surface of the inner ring 1, thereby improving the service life of the bearing. Moreover, the material used for the outer ring composed of the outer wear-resistant layer 3 and the backing 2 of this application is cheaper to produce in large quantities, thereby reducing costs.

[0035] The present invention also discloses a spherical bearing mold, including a first outer mold 6 and a second outer mold 7 detachably installed with the first outer mold 6. A first sealing component 9 and a second sealing component 10 are respectively sealed and installed at both ends of the inner surface of the circle formed by the first outer mold 6 and the second outer mold 7. The first outer mold 6, the second outer mold 7, the first sealing component 9 and the second sealing component 10 form a receiving cavity. The receiving cavity is provided with any of the aforementioned spherical bearings. An air inlet 8 communicating with the receiving cavity is installed on the outer surface of the first outer mold 6 or the second outer mold 7. An air duct 11 located on the outer surface of the spherical bearing is provided in the receiving cavity. The air inlet of the air duct 11 is connected to the air inlet 8.

[0036] See Figures 3 to 6 As shown, when manufacturing the spherical plain bearing, the spherical plain bearing is first placed in the accommodating cavity. At this time, the outer surface of the inner ring 1 of the spherical plain bearing is provided with an outer wear-resistant layer 3 and a backing 2. The contact surface between the outer surface of the inner ring 1 and the outer wear-resistant layer 3 is coated with a release agent to prevent the outer surface of the inner ring 1 from sticking to the inner surface of the outer wear-resistant layer 3 after the mold is cured. At this time, the inner ring 1, the backing 2 and the outer wear-resistant layer 3 are located in the inner circle of the air duct 11. Then, the first outer mold 6, the second outer mold 7, the first sealing component 9 and the second sealing component 10 are assembled to seal the accommodating cavity. The mold is heated to facilitate curing. High-pressure gas is injected into the air duct 11 through the air inlet 8. After receiving the high-pressure gas, the air duct 11 deforms, thereby gradually applying pressure to the outer surface of the backing 2, so that the backing 2 is fully contacted and fixedly connected with the outer wear-resistant layer 3 during the curing process.

[0037] The first sealing component 9 includes a first limiting end cap 91 disposed at the inner circular end of the accommodating cavity, and a core tube 92 is disposed inside the first limiting end cap 91.

[0038] The second sealing component 10 includes a second limiting end cap 101 disposed at the other end of the inner circle of the accommodating cavity. A locking cover 102 is sealed inside the second limiting end cap 101, and the locking cover 102 is detachably connected to the end face of the core tube 92.

[0039] The inflation nozzle 8 includes an inflation tube 81 connected to the outer surface of the first outer mold 6 or the second outer mold 7. The air outlet of the inflation tube 81 is connected to the air inlet of the air duct 11. A sealing plug 82 is installed at the air inlet of the inflation tube 81. An air core 83 communicating with the inside of the inflation tube 81 is provided in the sealing plug 82. A fixing nut 84 for fixing the sealing plug 82 is provided on the outer surface of the end of the air inlet of the inflation tube 81.

[0040] See Figures 3 to 6 As shown, the first limiting end cap 91 is first installed on the core tube 92, then the inner ring 1 of the spherical bearing is fitted onto the core tube 92, and then the core tube 92 is placed into the accommodating cavity. Finally, the accommodating cavity is sealed by the second limiting end cap 101 and the locking cap 102 on the other side. Finally, the locking cap 102 is connected to the core tube 92 to achieve the sealing of the accommodating cavity. During thermosetting, the mold can be placed in the middle of the hot press plate, and the air core 83 is connected to the air source. The hot press plate heats the mold so that the backing 2 can be cured. During the curing process, the gas enters the inflation tube 81 through the air core 83, and then the gas enters the air duct 11. Under the action of high pressure gas, the air duct 11 deforms and expands in the accommodating cavity, so that the air duct 11 squeezes the outer surface of the backing 2, thereby making the backing 2 and the outer wear-resistant layer 3 fully contact each other to achieve high-temperature curing connection.

[0041] After curing, remove the spherical bearing, apply adhesive to the outer surface of the wear-resistant composite layer composed of glass fiber layer 4 and inner wear-resistant layer 5, and bond the wear-resistant composite layer to the inner circle of inner ring 1.

[0042] In this embodiment, the first outer mold 6 and the second outer mold 7 are fixedly connected by bolts, and the locking cover 102 and the end face of the core tube 92 are also fixedly connected by bolts.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mould for a knuckle bearing, characterized in that: The device includes a first outer mold (6) and a second outer mold (7) detachably mounted to the first outer mold (6). A first sealing component (9) and a second sealing component (10) are respectively sealed at both ends of the inner surface of the circle formed by the first outer mold (6) and the second outer mold (7). The first outer mold (6), the second outer mold (7), the first sealing component (9), and the second sealing component (10) form a receiving cavity. A spherical bearing is provided in the receiving cavity. The spherical bearing includes an inner ring (1) and an outer ring. The outer ring includes an outer wear-resistant layer (3) rotatably disposed on the outer surface of the inner ring (1). A backing is provided on the outer surface of the outer wear-resistant layer (3). (2); A wear-resistant composite layer is bonded and installed on the inner surface of the inner ring (1). An air inlet (8) communicating with the accommodating cavity is installed on the outer surface of the first outer mold (6) or the second outer mold (7). An air duct (11) located on the outer surface of the joint bearing is provided in the accommodating cavity. The air inlet of the air duct (11) is connected to the air inlet (8). High-pressure gas is injected into the air duct (11) through the air inlet (8). The air duct (11) deforms after receiving the high-pressure gas, so that the air duct (11) gradually applies pressure to the outer surface of the backing (2), so that the backing (2) is fully contacted and fixedly connected with the outer wear-resistant layer (3) during the curing process. The first sealing component (9) includes a first limiting end cap (91) disposed at the inner circular end of the accommodating cavity, and a core tube (92) is disposed inside the first limiting end cap (91). The second sealing component (10) includes a second limiting end cap (101) disposed at the other end of the inner circle of the accommodating cavity. A locking cover (102) is sealed inside the second limiting end cap (101). The locking cover (102) is detachably connected to the end face of the core tube (92).

2. A mould for a knuckle bearing according to claim 1, wherein: The inflation nozzle (8) includes an inflation tube (81) connected to the outer surface of the first outer mold (6) or the second outer mold (7). The air outlet of the inflation tube (81) is connected to the air inlet of the air duct (11). A sealing plug (82) is installed at the air inlet of the inflation tube (81). An air core (83) communicating with the inside of the inflation tube (81) is provided in the sealing plug (82). A fixing nut (84) for fixing the sealing plug (82) is provided on the outer surface of the end of the air inlet of the inflation tube (81).

3. A spherical bearing mold according to claim 1, characterized in that: The wear-resistant composite layer includes a glass fiber layer (4) bonded to the inner surface of the inner ring (1), and an inner wear-resistant layer (5) is integrally provided on the inner circle of the glass fiber layer (4).

4. A spherical bearing mold according to claim 1, characterized in that: The backing (2) is made of glass fiber prepreg or carbon fiber cloth.

5. A spherical bearing mold according to claim 3, characterized in that: Both the outer wear-resistant layer (3) and the inner wear-resistant layer (5) are made of polytetrafluoroethylene fiber.

6. A spherical bearing mold according to claim 2, characterized in that: The backing (2) has the same width as the outer wear-resistant layer (3).

7. A spherical bearing mold according to claim 3, characterized in that: The inner ring (1), the glass fiber layer (4), and the inner wear-resistant layer (5) have the same width.

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