Knuckle bearing and die thereof

Abstract

The joint bearing comprises an inner ring and an outer ring, the outer ring comprises an outer wear-resistant layer rotationally arranged on the outer surface of the inner ring, and a backing is arranged on the outer surface of the outer wear-resistant layer; and a wear-resistant composite layer is adhered to the inner surface of the inner ring. The bearing has the advantages that the outer wear-resistant layer and the backing are arranged on the surface of the outer circumference, the inner ring does not need to be pressed in by cutting the outer ring in the radial direction, 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] The utility model relates to the technical field of joint bearings, in particular to a joint bearing and a mould thereof. Background Art

[0002] Bearings are a very important component in contemporary mechanical equipment. Their main functions are to support the weight of the equipment, provide positioning functions, reduce the friction coefficient during its movement, reduce equipment loss, extend equipment life, and improve equipment rotation accuracy. When using existing spherical bearings:

[0003] 1. During use: a. Lubricating oil needs to be added regularly; b. During use, the seat hole and the metal surface of the bearing outer ring are in contact and squeezed against each other, which can easily cause damage to the seat hole and the bearing outer ring, resulting in the need to replace the seat hole and the bearing at the same time, which is costly; c. The metal-to-metal contact between the pin and the inner ring can easily damage the pin and the bearing;

[0004] 2. 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 and then the inner ring is pressed into the outer ring by a machine, or the two ends of the outer ring are grooved and the inner ring is placed into the outer ring;

[0005] For this reason, we provide a kind of spherical plain bearing and its mould to solve the above problems. Utility Model Content

[0006] The utility model aims to overcome the shortcomings of the prior art and provide a spherical bearing and a mold thereof.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A spherical bearing comprises an inner ring and an outer ring, wherein the outer ring comprises an outer wear-resistant layer rotatably arranged on the outer surface of the inner ring, and a backing is arranged on the outer surface of the outer wear-resistant layer; and a wear-resistant composite layer is bonded and installed on the inner surface of the inner ring.

[0009] Preferably, the wear-resistant composite layer comprises a glass fiber layer bonded to the inner surface of the inner ring, and an inner wear-resistant layer is integrally provided inside the inner circle of the glass fiber layer.

[0010] Preferably, the backing is made of glass fiber prepreg cloth or carbon fiber cloth.

[0011] Preferably, the outer wear-resistant layer and the inner wear-resistant layer are both made of polytetrafluoroethylene fibers.

[0012] Preferably, the backing has the same width as the outer wear-resistant layer.

[0013] Preferably, the inner ring, the glass fiber layer and the inner wear-resistant layer have the same width.

[0014] The utility model also discloses a joint bearing mold, characterized in that it includes a first outer mold and a second outer mold detachably mounted with the first outer mold, the first and second closing components are respectively sealed and mounted at both ends of the circular inner surface formed by the first and second outer molds, the first and second closing components form a accommodating cavity, the joint bearing described in any one of claims 1 to 3 is provided in the accommodating cavity, an inflation nozzle connected to the accommodating cavity is installed on the outer surface of the first and second outer molds, an air duct located on the outer surface of the joint bearing is provided in the accommodating cavity, and the air inlet of the air duct is connected to the inflation nozzle.

[0015] Preferably, the first sealing component comprises a first limiting end cover arranged at the inner circular end of the accommodating cavity, and a core tube is arranged inside the first limiting end cover.

[0016] Preferably, the second sealing component includes a second limiting end cover arranged at the other end of the inner circle of the accommodating cavity, and a locking cover is sealed inside the second limiting end cover, and the locking cover is detachably connected to the end face of the core tube.

[0017] 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 installed with a sealing plug, the sealing plug is provided with an air core connected to the inside of the inflation tube, and the outer surface of the end of the inflation tube inlet is provided with a fixing nut for fixing the sealing plug.

[0018] The utility model has the following advantages:

[0019] 1. The utility model provides an outer wear-resistant layer and a backing on the outer circumferential surface, so that the inner ring can be pressed in without radial cutting of the outer ring, and the wear-resistant composite layer is provided in the inner hole of the inner ring, so that the pin does not need to directly contact the inner ring, thereby reducing the wear degree of the inner ring.

[0020] 2. The outer wear-resistant layer and the inner wear-resistant layer of the utility model are made of polytetrafluoroethylene fiber, thereby reducing the degree of wear of the inner ring during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the spherical bearing of the utility model.

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the spherical bearing of the utility model.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the mold of the utility model.

[0024] Figure 4It is a schematic diagram of the cross-sectional structure of the mold of the present utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the mold in the exploded state of the utility model.

[0026] Figure 6 It is a schematic diagram of the cross-sectional structure of the air duct of the utility model.

[0027] In the figure, 1. inner ring; 2. backing; 3. outer wear-resistant layer; 4. glass fiber 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 closing component; 91. first limiting end cover; 92. core tube; 10. second closing component; 101. first limiting end cover; 102. locking cover; 11. air duct; 12. spherical bearing. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1 — Figure 6 The embodiment shown.

[0031] A spherical bearing comprises an inner ring 1 and an outer ring, wherein the outer ring comprises an outer wear-resistant layer 3 rotatably arranged on the outer surface of the inner ring 1, and a backing 2 is arranged on the outer surface of the outer wear-resistant layer 3; and a wear-resistant composite layer is bonded and installed on the inner surface of the inner ring 1.

[0032] See also Figure 1 and Figure 2As shown, by arranging the outer wear-resistant layer 3 and the backing 2 on the outer circumferential surface of the inner ring 1, there is no need to radially cut the outer ring to press the inner ring in, and the wear-resistant composite layer is arranged in the inner hole of the inner ring 1, so that the pin does not need to directly contact the inner ring, thereby reducing the wear degree of the inner ring.

[0033] The wear-resistant composite layer comprises 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 inside the inner circle of the glass fiber layer 4 .

[0034] The glass fiber has high strength and strong mechanical strength, so that the bearing can always have a large load-bearing capacity in practice. Before the glass fiber layer 4 is wound around the inner wear-resistant layer 5, the glass fiber layer 4 needs to be soaked in the corresponding liquid resin, and then it needs to be heat-cured after being wound around the inner wear-resistant layer 5, and the size of the wear-resistant composite layer composed of the glass fiber layer 4 and the 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, an adhesive is applied to the inner circle of the inner ring 1 and the outer surface of the wear-resistant composite layer composed of the glass fiber layer 4 and the inner wear-resistant layer 5, and the inner ring 1 is connected and fixed to the wear-resistant composite layer as a whole by the adhesive.

[0035] The backing 2 is made of glass fiber prepreg cloth, and the backing 2 can also 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.

[0036] The backing 2 and the outer wear-resistant layer 3 have the same width; the inner ring 1 and the glass fiber layer 4 and the inner wear-resistant layer 5 have the same width.

[0037] 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" and the name "A fiber-wound bearing mass 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.

[0038] Before the outer wear-resistant layer 3 and the backing 2 are installed on the outer surface of the inner ring 1, a layer of release agent needs to be coated on the outer surface of the inner ring 1, and then a ring sleeve cut to fit the shape of the inner ring 1 is placed on the outer surface of the inner ring 1 coated with the coating agent. Then, the backing 2 made of glass fiber prepreg cloth or carbon fiber cloth is stacked on the surface of the outer wear-resistant layer 3 to a certain thickness according to the size of the inner ring 1, so that it can withstand a larger load.

[0039] Next, the inner ring provided with the outer wear-resistant layer 3 and the backing 2 is placed in the mold described below for curing so that the outer wear-resistant layer 3 and the backing 2 are fully combined. After the combination is completed, due to the release agent, the inner ring 1 and the outer wear-resistant layer 3 do not adhere to each other, so that the inner ring 1 and the outer wear-resistant layer 3 can move relative to each other.

[0040] The glass fiber layer 4 is soaked in liquid resin, and then the glass fiber layer 4 is wound on the outer surface of the inner wear-resistant layer 5, and the glass fiber layer 4 and the inner wear-resistant layer 5 are combined by heating and curing.

[0041] After the outer ring composed of the outer wear-resistant layer 3 and the backing 2 is installed with the inner ring 1, an adhesive is coated on the inner circle of the inner ring 1 and the outer surface of the wear-resistant composite layer, and then the wear-resistant composite layer composed 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.

[0042] By installing the outer wear-resistant layer 3, the backing 2 and the inner ring 1 in the following mold, there is no need to radially disconnect the outer ring in the traditional way and then press the inner ring into the outer ring by a machine. Compared with the existing manufacturing process, it is more convenient and quicker, and the outer wear-resistant layer 3 and the backing 2 on the outer surface of the inner ring 1 of the present application can prevent the surface of the inner ring 1 from being worn, thereby increasing the service life of the bearing, and the material used for the outer ring composed of the outer wear-resistant layer 3 and the backing 2 of the present application is lower in cost under mass production, thereby reducing costs.

[0043] The utility model also discloses a joint bearing mold, comprising a first outer mold 6 and a second outer mold 7 detachably mounted with the first outer mold 6, wherein the first outer mold 6 and the second outer mold 7 are respectively and sealingly mounted with a first closing component 9 and a second closing component 10 at both ends of the circular inner surface formed by the first outer mold 6 and the second outer mold 7, the first outer mold 6, the second outer mold 7 and the first closing component 9 and the second closing component 10 form a receiving cavity, wherein any of the above-mentioned joint bearings is arranged in the receiving cavity, an inflation nozzle 8 connected with the receiving cavity is installed on the outer surface of the first outer mold 6 or the second outer mold 7, and an air duct 11 located on the outer surface of the joint bearing is arranged in the receiving cavity, and an air inlet of the air duct 11 is connected with the inflation nozzle 8.

[0044] See also Figures 3 to 6 As shown, when manufacturing the spherical bearing, the spherical bearing is first placed in the accommodating cavity. At this time, the outer surface of the inner ring 1 of the spherical bearing is provided with an outer wear-resistant layer 3 and a backing 2, and a release agent is coated on the contact surface between the outer surface of the inner ring 1 and the outer wear-resistant layer 3 to prevent the outer surface of the inner ring 1 from bonding with 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, and then the first outer mold 6, the second outer mold 7, the first closing component 9 and the second closing component 10 are assembled to close the accommodating cavity, the mold is heated to facilitate curing, and high-pressure gas is injected into the air duct 11 through the inflation nozzle 8. The air duct 11 is deformed 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 in contact with the outer wear-resistant layer 3 and fixedly connected during the curing process.

[0045] The first closing component 9 comprises a first limiting end cover 91 arranged at the inner circular end of the accommodating cavity, and a core tube 92 is arranged inside the first limiting end cover 91 .

[0046] The second sealing component 10 includes a second limiting end cover 101 arranged at the other end of the inner circle of the accommodating cavity. The second limiting end cover 101 is sealed with a locking cover 102 inside. The locking cover 102 is detachably connected to the end surface of the core tube 92.

[0047] 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, the air inlet of the inflation tube 81 is installed with a sealing plug 82, the sealing plug 82 is provided with an air core 83 connected to the inside of the inflation tube 81, and the outer surface of the air inlet end of the inflation tube 81 is provided with a fixing nut 84 for fixing the sealing plug 82.

[0048] See also Figures 3 to 6 As shown, the first limiting end cover 91 is first installed on the core tube 92, and then the inner ring 1 of the spherical bearing is sleeved on the core tube 92, and then the core tube 92 is placed in the accommodating cavity, and finally the accommodating cavity is closed by the second limiting end cover 101 and the locking cover 102 on the other side, and finally the locking cover 102 is connected to the core tube 92, so as to achieve the closure of the accommodating cavity. When performing thermal curing, the mold can be placed in the middle of the hot pressing plate, and the air core 83 is connected to the air source, and the hot pressing 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 again. Under the action of the high-pressure gas, the air duct 11 is deformed and expanded in the accommodating cavity, so that the air duct 11 squeezes the outer surface of the backing 2, and then the backing 2 and the outer wear-resistant layer 3 are fully contacted to perform high-temperature curing connection.

[0049] 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 surface of the core tube 92 are also fixedly connected by bolts.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spherical bearing, characterized in that: It comprises an inner ring (1) and an outer ring, wherein the outer ring comprises an outer wear-resistant layer (3) rotatably arranged on the outer surface of the inner ring (1), and a backing (2) is arranged on the outer surface of the outer wear-resistant layer (3); and a wear-resistant composite layer is bonded and installed on the inner surface of the inner ring (1).

2. A spherical plain bearing according to claim 1, characterized in that: The wear-resistant composite layer comprises 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).

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

4. The spherical plain bearing according to claim 2, characterized in that: The outer wear-resistant layer (3) and the inner wear-resistant layer (5) are both made of polytetrafluoroethylene fibers.

5. The spherical plain bearing according to claim 1, characterized in that: The backing (2) and the outer wear-resistant layer (3) have the same width.

6. The spherical plain bearing according to claim 2, characterized in that: The inner ring (1), the glass fiber layer (4) and the inner wear-resistant layer (5) have the same width.

7. A spherical bearing mold, characterized in that: The invention comprises a first outer mold (6) and a second outer mold (7) detachably mounted on the first outer mold (6); a first closing component (9) and a second closing component (10) are respectively and sealedly mounted on both ends of the circular inner surface formed by the first outer mold (6) and the second outer mold (7); the first outer mold (6), the second outer mold (7) and the first closing component (9) and the second closing component (10) form a receiving cavity; the receiving cavity is provided with a spherical bearing according to any one of claims 1 to 6; an inflation nozzle (8) connected to the receiving cavity is mounted on the outer surface of the first outer mold (6) or the second outer mold (7); the receiving cavity is provided with an air duct (11) located on the outer surface of the spherical bearing; the air inlet of the air duct (11) is connected to the inflation nozzle (8).

8. The spherical plain bearing mold according to claim 7, characterized in that: The first sealing component (9) comprises a first limiting end cover (91) arranged at the inner circular end of the accommodating cavity, and a core tube (92) is arranged inside the first limiting end cover (91).

9. The spherical plain bearing mold according to claim 8, characterized in that: The second sealing component (10) comprises a second limiting end cover (101) arranged at the other end of the inner circle of the accommodating cavity, and the second limiting end cover (101) is sealed inside with a locking cover (102), and the locking cover (102) is detachably connected to the end surface of the core tube (92).

10. The spherical plain bearing mold according to claim 7, characterized in that: The inflation nozzle (8) comprises 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); the air inlet of the inflation tube (81) is provided with a sealing plug (82); the sealing plug (82) is provided with an air core (83) connected to the inside of the inflation tube (81); and the outer surface of the end of the air inlet of the inflation tube (81) is provided with a fixing nut (84) for fixing the sealing plug (82).

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