Protective structure of knuckle bearing applying oil cylinder lug ring

Abstract

The utility model discloses a protective structure of a knuckle bearing applying an oil cylinder lug ring, which comprises the knuckle bearing, the knuckle bearing is mounted in an assembly hole of the oil cylinder lug ring, a pin shaft is arranged in the knuckle bearing in a penetrating manner, a shaft sleeve and a spacer bush are sleeved on the pin shaft, and the shaft sleeve and the spacer bush are respectively positioned at two ends of the knuckle bearing; the pressing assembly is connected with the oil cylinder lug ring, and a first sealing piece is arranged between the pressing assembly and the spacer bush; the flange plate is connected with the oil cylinder lug ring, and a second sealing piece is arranged between the flange plate and the shaft sleeve. By arranging the first sealing piece, external sundries / water can be prevented from entering the knuckle bearing from a gap between the cover plate and the spacer bush, and by arranging the second sealing piece, sundries / water can be prevented from entering the knuckle bearing from a gap between the shaft sleeve and the flange plate.

Description

Technical Field

[0001] The utility model relates to the technical field of joint bearings, in particular to a protective structure of a joint bearing using an oil cylinder earring. Background Art

[0002] At present, the working environment of some oil cylinders is relatively bad, and they need to be soaked in mud. At the same time, the mud is accompanied by impurities such as gravel and slag, which will get stuck on the spherical bearings and cause the spherical bearings to fail. Therefore, for oil cylinders with relatively bad working environments, the spherical bearings need to be protected from water and slag to prevent the bearings from rusting or failing. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the utility model provides a protective structure of a joint bearing using a cylinder earring, which can protect the joint bearing.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a protective structure of a joint bearing using a cylinder earring, comprising: a joint bearing, the joint bearing is installed in the assembly hole of the cylinder earring, a pin is passed through the joint bearing, a shaft sleeve and a spacer are sleeved on the pin, and the shaft sleeve and the spacer are respectively located at both ends of the joint bearing; a clamping assembly, the clamping assembly is connected to the cylinder earring, a first seal is provided between the clamping assembly and the spacer; a flange plate, the flange plate is connected to the cylinder earring, a second seal is provided between the flange plate and the shaft sleeve.

[0005] Furthermore, the first sealing component includes: a first sealing body and a second sealing lip, the first sealing body and the second sealing lip are integrally formed, the first sealing body is embedded in the clamping assembly, and the first sealing lip abuts against the spacer sleeve to provide radial sealing force.

[0006] Furthermore, the first sealing lip includes an inclined surface A and a curved surface B, the inclined surface A faces the spacer, the curved surface B faces the first sealing body, and there is a gap between the curved surface B and the first sealing body.

[0007] Furthermore, the first sealing body comprises an inclined surface C, the inclined surface C faces the curved surface B, and there is an arc transition between the inclined surface C and the curved surface B.

[0008] Furthermore, the clamping assembly includes: a pressure cover and a cover plate, the pressure cover is connected to the cylinder earring by screws, the cover plate is connected to the pressure cover by screws, an installation groove is formed between the pressure cover and the cover plate, and the first sealing body is installed in the installation groove.

[0009] Furthermore, the second sealing member includes: a second sealing body and a second sealing lip, the second sealing body and the second sealing lip are integrally formed, the second sealing body is sleeved on the shaft sleeve, and the second sealing lip abuts against the flange plate.

[0010] Furthermore, a first sealing ring is provided between the spacer and the pin shaft.

[0011] Furthermore, a second sealing ring is provided between the shaft sleeve and the pin shaft.

[0012] Furthermore, a third sealing ring is provided between the gland and the oil cylinder earring.

[0013] Furthermore, a fourth sealing ring is provided between the flange plate and the oil cylinder earring.

[0014] The beneficial effect of the utility model is that the protective structure of the utility model can prevent external debris / water from entering the spherical bearing from the gap between the cover plate and the spacer by setting the first seal, and can prevent debris / water from entering the spherical bearing from the gap between the shaft sleeve and the flange plate by setting the second seal. By improving the structure of the first seal, the compression space and practical life of the first seal can be increased, and a good sealing effect can be achieved when the spherical bearing swings. By setting multiple sealing rings, it is possible to further prevent external debris / water from entering the spherical bearing from the assembly gaps between the various components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a cross-sectional view of the protective structure of the utility model.

[0017] Figure 2 It is a cross-sectional view of the first sealing member of the utility model.

[0018] Figure 3 It is a schematic diagram of the state change of the first sealing member of the utility model when the spherical bearing swings.

[0019] Figure 4 It is a structural schematic diagram of the gland assembly of the utility model.

[0020] Figure 5 It is a structural schematic diagram of the second sealing member of the utility model.

[0021] In the figure: 1. spherical bearing; 3. pin shaft; 4. bushing; 5. spacer; 6. clamping assembly; 7. first sealing member; 8. flange plate; 9. second sealing member; 10. first sealing ring; 11. second sealing ring; 12. third sealing ring; 13. fourth sealing ring; 61. pressure cover; 62. cover plate; 71. first sealing body; 72. second sealing lip; 91. second sealing body; 92. second sealing lip. DETAILED DESCRIPTION

[0022] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0023] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 indirectly connected 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.

[0025] like Figures 1 to 5As shown, the protective structure of the spherical bearing proposed by the utility model includes: a spherical bearing 1, a clamping assembly 6 and a flange plate 8. The spherical bearing 1 is installed in the assembly hole of the cylinder earring 2. A pin shaft 3 is inserted in the spherical bearing 1. A sleeve 4 and a spacer 5 are sleeved on the pin shaft 3. The sleeve 4 and the spacer 5 are respectively located at the two ends of the spherical bearing 1. The clamping assembly 6 is connected to the cylinder earring 2. A first seal 7 is provided between the clamping assembly 6 and the spacer 5. The flange plate 8 is connected to the cylinder earring 2. A second seal 9 is provided between the flange plate 8 and the sleeve 4. By providing the first seal 7 and the second seal 9, the two ends of the spherical bearing 1 can be effectively protected (waterproof and slag-proof), and the service life of the spherical bearing 1 in harsh environments can be extended. In a specific embodiment, the sleeve 4 is T-shaped.

[0026] Specifically, the first seal 7 includes: a first sealing body 71 and a second sealing lip 72. The first sealing body 71 and the second sealing lip 72 are integrally formed. The first sealing body 71 is embedded in the clamping assembly 6. The first sealing lip 72 abuts against the spacer 5 to provide radial sealing force. The second sealing lip 72 and the spacer 5 have an interference fit. The extrusion force of the spacer 5 on the second sealing lip 72 and the elastic force of the second sealing lip 72 interact with each other to achieve a good sealing effect.

[0027] For example, the first sealing lip 72 includes an inclined surface A and a curved surface B, wherein the inclined surface A faces the spacer 5, and the curved surface B faces the first sealing body 71, and there is a gap between the curved surface B and the first sealing body 71. When the second sealing lip 72 is subjected to the extrusion force of the spacer 5, the inclined surface A can be more evenly fitted with the surface of the spacer 5, which can reduce the leakage problem caused by the uneven sealing surface or the small gap, and is conducive to improving the reliability and stability of the seal. When the second sealing lip 72 is squeezed and deformed, the curved surface B can be further deformed to better adapt to and resist the pressure, preventing the second sealing lip 72 from being crushed due to excessive pressure, which is conducive to extending the service life of the second seal 7.

[0028] For example, the first sealing body 71 includes an inclined surface C, which faces the curved surface B, and there is an arc transition between the inclined surface C and the curved surface B. There is a gap between the inclined surface C and the curved surface B. The design of the inclined surface C here can make the gap larger, and the compressible space of the first sealing lip 72 becomes larger. When the first sealing lip 72 is compressed, the use of an arc transition between the inclined surface C and the curved surface B can make the stress more dispersed and avoid concentration on one point, which can reduce fatigue and cracking of the first sealing component 7, and is conducive to improving the strength and durability of the first sealing component 7.

[0029] It should be noted that the first seal 7 of the utility model is improved in structure, and when the spherical bearing 1 swings, the first seal 7 can still play an effective sealing role. When the spherical bearing 1 swings, the spacer 5 will also swing through the transmission of the pin 3. The swinging of the spacer 5 will increase the pressure on the second sealing lip 72 on one side and reduce the pressure on the second sealing lip 72 on the other side. Since the second sealing lip 72 of the utility model has a large space that can be compressed, in a normal state, the compression amount of the second sealing lip 72 can be adjusted to a middle position. In this way, when swinging occurs, the second sealing lip 72 has good adaptability and can always fit tightly with the surface of the spacer 5.

[0030] Specifically, the clamping assembly 6 includes: a gland 61 and a cover plate 62. The gland 61 is connected to the cylinder earring 2 by screws, and the cover plate 62 is connected to the gland 61 by screws. A mounting groove 63 is formed between the gland 61 and the cover plate 62, and the first sealing body 71 is installed in the mounting groove 63. The three surfaces of the first sealing body 71 are in close contact with the mounting groove 63. During installation, the gland 63 is first assembled with the cylinder earring 2, and then the first sealing body 71 is pressed into the L-shaped step surface of the gland 61, and then the cover plate 62 is assembled with the gland 61, so as to form a tight fixation of the first sealing body 71. The advantage of this design is that when the first seal 71 needs to be replaced due to the expiration of its service life, it is only necessary to remove the cover plate 62 to replace the first seal 7, which is convenient and quick to operate. The first seal 7 can prevent external debris / water from entering the spherical bearing 1 through the gap between the cover plate 62 and the spacer 5.

[0031] Specifically, the second seal 9 includes: a second seal body 91 and a second seal lip 92, the second seal body 91 and the second seal lip 92 are integrally formed, the second seal body 91 is sleeved on the shaft sleeve 4, and the second seal lip 92 abuts against the flange plate 8. Two adjacent surfaces of the second seal body 91 are tightly fitted at right angles to the shaft sleeve 4, and the second seal lip 92 abuts against the surface of the flange plate 8 away from the cylinder earring 2. The second seal 9 can prevent debris / water from entering the spherical bearing 1 from the gap between the shaft sleeve 4 and the flange plate 8.

[0032] In addition, a first sealing ring 10 is provided between the spacer 5 and the pin 3. A second sealing ring 11 is provided between the shaft sleeve 4 and the pin 3. A third sealing ring 12 is provided between the gland 61 and the cylinder earring 2. A fourth sealing ring 13 is provided between the flange plate 8 and the cylinder earring 2. These sealing rings can further prevent external debris / water from entering the spherical bearing 1 from the assembly gaps between the various components.

[0033] It should be noted that the first sealing member 7 , the second sealing member 9 , the first sealing ring 10 , the second sealing ring 11 , the third sealing ring 12 , and the fourth sealing ring 13 are all annular.

[0034] In summary, the protective structure of the utility model can prevent external debris / water from entering the spherical bearing 1 from the gap between the cover plate 62 and the spacer 5 by providing the first seal 7, and can prevent debris / water from entering the spherical bearing 1 from the gap between the shaft sleeve 4 and the flange plate 8 by providing the second seal 9. By improving the structure of the first seal 7, the compression space and practical life of the first seal 7 can be increased, and a good sealing effect can be achieved when the spherical bearing 1 swings. By providing multiple sealing rings, external debris / water can be further prevented from entering the spherical bearing 1 from the assembly gaps between the various components.

[0035] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A protective structure for a spherical bearing using a cylinder earring, characterized in that: include: A spherical bearing (1), the spherical bearing (1) being mounted in an assembly hole of an oil cylinder earring (2), a pin shaft (3) being passed through the spherical bearing (1), a shaft sleeve (4) and a spacer sleeve (5) being sleeved on the shaft sleeve (3), the shaft sleeve (4) and the spacer sleeve (5) being respectively located at two ends of the spherical bearing (1); A clamping assembly (6), the clamping assembly (6) being connected to the oil cylinder earring (2), and a first sealing member (7) being provided between the clamping assembly (6) and the spacer (5); A flange plate (8), the flange plate (8) being connected to the oil cylinder earring (2), and a second sealing member (9) being provided between the flange plate (8) and the shaft sleeve (4).

2. The protective structure of the spherical bearing using the cylinder earring according to claim 1, characterized in that: The first sealing member (7) comprises: a first sealing body (71) and a first sealing lip (72); the first sealing body (71) and the first sealing lip (72) are integrally formed; the first sealing body (71) is embedded in the clamping assembly (6); and the first sealing lip (72) abuts against the spacer (5) to provide a radial sealing force.

3. The protective structure of the spherical bearing using the cylinder earring as claimed in claim 2, characterized in that: The first sealing lip (72) comprises an inclined surface A and a curved surface B, the inclined surface A faces the spacer (5), the curved surface B faces the first sealing body (71), and there is a gap between the curved surface B and the first sealing body (71).

4. The protective structure of the spherical bearing using the cylinder earring as claimed in claim 3 is characterized in that: The first sealing body (71) comprises an inclined surface C, the inclined surface C faces the curved surface B, and there is an arc transition between the inclined surface C and the curved surface B.

5. The protective structure of the spherical bearing using the cylinder earring as claimed in claim 2, characterized in that: The clamping assembly (6) comprises: a gland (61) and a cover plate (62); the gland (61) is connected to the oil cylinder earring (2) via screws; the cover plate (62) is connected to the gland (61) via screws; a mounting groove (63) is formed between the gland (61) and the cover plate (62); and the first sealing body (71) is mounted in the mounting groove (63).

6. The protective structure of the spherical bearing using the cylinder earring according to claim 1, characterized in that: The second sealing member (9) comprises: a second sealing body (91) and a second sealing lip (92); the second sealing body (91) and the second sealing lip (92) are integrally formed; the second sealing body (91) is sleeved on the shaft sleeve (4); and the second sealing lip (92) abuts against the flange plate (8).

7. The protective structure of the spherical bearing using the cylinder earring according to claim 1, characterized in that: A first sealing ring (10) is provided between the spacer (5) and the pin shaft (3).

8. The protective structure of the spherical bearing using the cylinder earring as claimed in claim 1, characterized in that: A second sealing ring (11) is provided between the shaft sleeve (4) and the pin shaft (3).

9. The protective structure of the spherical bearing using the cylinder earring as claimed in claim 5, characterized in that: A third sealing ring (12) is provided between the gland (61) and the oil cylinder earring (2).

10. The protective structure of the spherical bearing using the cylinder earring according to claim 1, characterized in that: A fourth sealing ring (13) is provided between the flange plate (8) and the oil cylinder earring (2).

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