Antifouling structure of knuckle bearing

Abstract

The utility model relates to the technical field of joint bearings, in particular to a joint bearing antifouling structure which comprises a joint bearing, the joint bearing comprises a bearing inner ring and a bearing outer ring, the bearing inner ring is rotatably connected in the bearing inner ring and comprises a lug ring and a pressing plate, the lug ring is provided with a through hole, and the joint bearing is arranged in the lug ring. The pressing plates are fixedly connected to the two end openings of the lug ring respectively, the knuckle bearing is fixed in the through hole of the lug ring, and dustproof rings are arranged between the pressing plates and the knuckle bearing. The device is simple in structure and low in cost; repeated disassembly can be achieved, and disassembly and assembly are convenient; a plurality of sealing structures can effectively prevent dust from invading the knuckle bearing; and the dust-proof device can be directly arranged on a common knuckle bearing to achieve a dust-proof effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to joint bearing technical field especially relates to a joint bearing antifouling structure. BACKGROUND

[0002] Joint bearing can set up dustproof ring, can satisfy the work requirement under ordinary working condition, plays the role of dustproof and antifouling. In special environment, such as hydraulic grab working condition, especially the hydraulic grab in the very poor environment, for example, garbage work station, chemical waste place and so on, the conventional dustproof ring is difficult to play the dustproof effect, and the joint bearing service life is affected. Based on this situation, a more reliable joint bearing antifouling structure needs to be invented.

[0003] For example, a kind of joint bearing with good sealing is disclosed in Chinese patent, authorized announcement No.CN219262976U, belongs to bearing technical field, it includes joint bearing body, the dustproof sealing ring is arranged in the side of joint bearing body, the dustproof sealing ring is fixedly connected with several telescopic rods in, the telescopic rod one end is fixedly connected with flexible sealing pad. The utility model above, by setting dustproof sealing ring, telescopic rod, spring, flexible sealing pad, screw hole and mounting screw rod, to make flexible sealing pad and joint bearing body contact more closely. The deficiency is that the utility model is optimized to the structure of joint bearing, and the structure is more special, and certain cost needs to be increased in production and manufacture and later maintenance. SUMMARY

[0004] In view of the prior art problems, the utility model provides a joint bearing antifouling structure which is simple in structure, can be directly installed on ordinary joint bearing, easy to install and disassemble, and can play the dustproof effect in harsh working conditions.

[0005] To achieve the above technical effects, the utility model provides:

[0006] A joint bearing antifouling structure, comprising a joint bearing, the joint bearing comprising a bearing inner ring and a bearing outer ring, the bearing inner ring being rotatably connected inside the bearing inner ring, comprising an ear ring and a pressing plate, the ear ring having a through hole and being internally provided with a joint bearing, the pressing plate being fixedly connected at two ports of the ear ring respectively, and the joint bearing is fixed in the through hole of the ear ring, and a dustproof ring is arranged between the pressing plate and the joint bearing.

[0007] The ear ring is fixedly connected with the pressing plate at two ports, and the two pressing plates fix the joint bearing and the dustproof ring inside the through hole of the ear ring, a plurality of sealing structures are formed between the dustproof ring and the ear ring and the pressing plate, which can effectively cope with dust and dirt in harsh environments.

[0008] The pressing plate has a stepped through hole with a first contact surface and a positioning protrusion embedded in the through hole of the ear ring.

[0009] The dustproof ring is arranged in the stepped through hole and forms a first sealing surface with the first contact surface, and has a second contact surface forming a second sealing surface with the outer surface of the bearing inner ring.

[0010] The second contact surface is a spherical surface matched with the outer surface of the bearing inner ring.

[0011] The dustproof ring is provided with a reserved surface on the surface where the second contact surface is located, and the reserved surface forms a reserved space with the outer surface of the bearing inner ring.

[0012] The positioning protrusion abuts against the end surface of the bearing outer ring, and the dustproof ring abuts against the bearing outer ring.

[0013] The inner diameter of the stepped through hole is larger than the inner diameter of the dustproof ring.

[0014] The first contact surface is in L shape.

[0015] The pressing plate is fixedly connected with the ear ring through a screw.

[0016] The outer surface of the bearing inner ring and the outer surface of the bearing outer ring are both provided with an oil storage groove.

[0017] The beneficial effects of the utility model are:

[0018] The utility model has the advantages of simple structure, less components for realizing technical effects, low cost, direct installation on common joint bearings, dustproof effect, repeated disassembly and assembly, multi-seal structure for effectively preventing dust and dirt from entering the joint bearing. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a whole structure schematic view of joint bearing dustproof structure.

[0020] Fig. 2 It is a structure schematic view of pressing plate.

[0021] Fig. 3 It is a structure schematic view of dustproof ring.

[0022] DRAWINGS

[0023] 100, joint bearing; 200, ear ring; 300, pressing plate; 400, dustproof ring; 500, screw;

[0024] 101, bearing inner ring; 102, bearing outer ring; 103, oil storage groove;

[0025] 301. Stepped through hole; 302. Positioning protrusion; 303. First contact surface; 304. First sealing surface;

[0026] 401. Second contact surface; 402. Second sealing surface; 403. Reserved surface; 404. Reserved space; Detailed Implementation

[0027] Example 1

[0028] Reference Appendix Fig. 1 In this embodiment, the anti-fouling structure of the spherical plain bearing includes a spherical plain bearing 100, which includes an inner ring 101 and an outer ring 102. The inner ring 101 is rotatably connected inside the bearing. The structure also includes an earring 200 and a pressure plate 300. The earring 200 has a through hole and houses the spherical plain bearing 100. The pressure plate 300 is fixedly connected to both ends of the earring 200 and fixes the spherical plain bearing 100 within the through hole of the earring 200. A dustproof ring 400 is provided between the pressure plate 300 and the spherical plain bearing 100. The pressure plate 300 is fixedly connected to the earring 200 by screws 500.

[0029] In this embodiment, the spherical plain bearing 100 is an integral bearing with an outer ring 102. Both the outer surface of the inner ring 101 and the outer surface of the outer ring 102 are provided with oil reservoirs 103. The inner ring 101 has a through hole for the rod-shaped assembly and an oil reservoir 103 on its inner wall. Its outer surface is spherical. The outer ring 102 is fitted onto the outer surface of the inner ring 101, and the two are rotatably fitted together. The thickness of the outer ring 102 is less than the thickness of the inner ring 101.

[0030] In this embodiment, the earring 200 has a ring-shaped structure and serves as a substitute for the outer ring 102 of the rod end spherical bearing 100. The two end faces of the earring 200 are parallel, and its through-hole is vertically opened on the end face. The spherical bearing 100 is placed inside the through-hole of the earring 200, wherein the outer surface of the bearing outer ring 102 transitions with the inner surface of the through-hole of the earring 200. A pressure plate 300 is fastened to each of the two ends of the through-hole of the earring 200, and the pressure plate 300 is fixed to the end face of the earring 200 by screws 500. This arrangement facilitates disassembly. The two pressure plates 300 confine the spherical bearing 100 within the through-hole of the earring 200, and a dustproof ring 400 is provided between the pressure plate 300 and the spherical bearing 100. The dustproof ring 400 prevents dust and dirt from entering the mating surface between the inner ring 101 and the outer ring 102 of the bearing, as well as the mating surface between the outer ring 102 and the earring 200.

[0031] Reference Appendix Fig. 1 and 2The pressing plate 300 has a stepped through hole 301 with a first contact surface 303 and a positioning protrusion 302 which is embedded in the through hole of the earring 200. The first contact surface 303 is L-shaped. The positioning protrusion 302 of the pressing plate 300 is arranged at the opening of the larger inner diameter end of the stepped through hole 301, and the outer diameter size of the positioning protrusion 302 corresponds to the inner diameter size of the earring 200, thereby playing a positioning role when the pressing plate 300 is connected with the earring 200. In addition, after the two pressing plates 300 are fixedly connected with the earring 200, the positioning protrusions 302 of the two pressing plates 300 respectively abut against the upper and lower end faces of the bearing outer ring 102, thereby playing a positioning and fixing role on the joint bearing 100. The first contact surface 303 is a matching surface formed by the stepped through hole 301, and in this embodiment, the longitudinal section of the first contact surface 303 is L-shaped. Due to the positional relationship between the positioning protrusion 302 and the first contact surface 303, the L-shaped structure can avoid metal fatigue caused by repeated disassembly when the pressing plate 300 is made of metal. At the same time, the processing of the pressing plate 300 is also easier.

[0032] Reference is made to the accompanying drawings Fig. 1 and 3 The dustproof ring 400 is arranged in the stepped through hole 301 and forms a first sealing surface 304 with the first contact surface 303. The dustproof ring 400 has a second contact surface 401 which forms a second sealing surface 402 with the outer side surface of the bearing inner ring 101. In this embodiment, the dustproof ring 400 is improved on the basis of the conventional dustproof ring 400, and the dustproof ring 400 with the second contact surface 401 is processed. After assembly, the dustproof ring 400 is located in the stepped through hole 301 and cooperates with the first contact surface 303. The larger end face of the dustproof ring 400 faces the stepped through hole 301, and the dustproof ring 400 cooperates with the first contact surface 303 to form the first sealing surface 304. The horizontal surface of the first contact surface 303 cooperates with the larger end face of the dustproof ring 400, and the vertical circumferential surface of the first contact surface 303 cooperates with the outer circumferential surface of the dustproof ring 400, thereby forming two sealing surfaces to further prevent dust from entering.

[0033] The second contact surface 401 is a spherical surface which cooperates with the outer surface of the bearing inner ring 101. The dustproof ring 400 abuts against the bearing outer ring 102. After assembly, the second contact surface 401 of the dustproof ring 400 cooperates with the spherical outer side surface of the bearing inner ring 101 to form the second sealing surface 402, and the smaller end face of the dustproof ring 400 elastically abuts against the end face of the bearing outer ring 102 to form a seal. In combination with the effect of the first sealing surface 304, the dustproof ring 400 can effectively prevent dust from entering the cooperation surface between the bearing inner ring 101 and the bearing outer ring 102 and the cooperation surface between the bearing outer ring 102 and the earring 200.

[0034] It should be noted that the thickness of the dustproof ring 400 needs to correspond to the vertical size of the first contact surface 303. Since the dustproof ring 400 is made of elastic material, its actual thickness can be equal to or slightly larger than the vertical size of the first contact surface 303. In this way, it can be ensured that after assembly is completed, the dustproof ring 400 is in close contact with the first contact surface 303, and the first sealing surface 304 will not fail.

[0035] The inner diameter of the stepped through hole 301 is larger than the inner diameter of the dustproof ring 400. The dustproof ring 400 is provided with a reserved surface 403 on the surface where the second contact surface 401 is located, and the reserved surface 403 forms a reserved space 404 with the outer surface of the bearing inner ring 101. The inner diameter of the stepped through hole 301 is larger than the inner diameter of the dustproof ring 400, which avoids the rod passing through the bearing inner ring 101 from rubbing and rubbing with the stepped through hole 301 when it is tilted, causing damage between the two parts. At the same time, the reserved surface 403 is processed on the second contact surface 401 of the dustproof ring 400, which improves the tilting angle range of the rod passing through the bearing inner ring 101, and avoids the rod from being pressed at the corner of the sealing ring when it is tilted, causing the second sealing surface 402 to fail.

[0036] Embodiment Two

[0037] Continuing to refer to the accompanying drawings Figs. 1 to 3 In this embodiment, the joint bearing anti-pollution structure includes a joint bearing 100, the joint bearing 100 includes a bearing inner ring 101 and a bearing outer ring 102, the bearing inner ring 101 is rotatably connected inside the bearing inner ring 101, includes an ear ring 200 and a pressing plate 300, the ear ring 200 has a through hole and is built-in with the joint bearing 100, the pressing plate 300 is fixedly connected at two ports of the ear ring 200 respectively, and the joint bearing 100 is fixed in the through hole of the ear ring 200, and the pressing plate 300 is provided with a dustproof ring 400 between the joint bearing 100. The pressing plate 300 is fixedly connected with the ear ring 200 through a screw 500.

[0038] In this embodiment, the joint bearing 100 is a double-seam bearing outer ring 102 joint bearing 100, and the bearing outer ring 102 is composed of two 1 / 2 circular bearing outer rings 102. The outer side surface of the bearing inner ring 101 and the outer side surface of the bearing outer ring 102 are both provided with oil storage grooves 103. The bearing inner ring 101 has a through hole for passing a rod-shaped component and an inner wall provided with an oil storage groove 103, and the outer side surface is a spherical surface. The bearing outer ring 102 is sleeved on the outer side surface of the bearing inner ring 101 and rotatably connected with each other. The thickness of the bearing outer ring 102 is less than the thickness of the bearing inner ring 101.

[0039] In this embodiment, the earring 200 is in a ring structure. The two end faces of the earring 200 are parallel, and the through hole is vertically provided on the end face. The joint bearing 100 is arranged in the through hole of the earring 200, and the outer side face of the bearing outer ring 102 is in transition fit with the inner side face of the through hole of the earring 200. A pressing plate 300 is buckled at each port of the through hole of the earring 200, and the pressing plate 300 is fixed to the end face of the earring 200 by a screw 500. The advantage of this arrangement is that it is convenient for disassembly. The two pressing plates 300 limit the joint bearing 100 in the through hole of the earring 200, and a dustproof ring 400 is arranged between the pressing plate 300 and the joint bearing 100. The dustproof ring 400 is used to prevent dust from entering the fit faces between the bearing inner ring 101 and the bearing outer ring 102, and between the bearing outer ring 102 and the earring 200.

[0040] The pressing plate 300 has a stepped through hole 301 and a positioning protrusion 302. The stepped through hole 301 has a first contact face 303, and the positioning protrusion 302 is embedded in the through hole of the earring 200. The first contact face 303 is in L shape. The positioning protrusion 302 of the pressing plate 300 is arranged at the opening of the larger inner diameter end of the stepped through hole 301, and the outer diameter size of the positioning protrusion 302 corresponds to the inner diameter size of the earring 200, which plays a positioning role when the pressing plate 300 is connected with the earring 200. In addition, after the fixed connection of the two pressing plates 300 and the earring 200 is completed, the positioning protrusions 302 of the two pressing plates 300 abut against the upper and lower end faces of the bearing outer ring 102, respectively, which plays a positioning and fixing role for the joint bearing 100. The first contact face 303 is the fit face formed by the stepped through hole 301. In this embodiment, the longitudinal section of the first contact face 303 is in L shape. Due to the positional relationship between the positioning protrusion 302 and the first contact face 303, the structural feature of L shape can avoid metal fatigue caused by repeated disassembly when the pressing plate 300 is made of metal. At the same time, the processing of the pressing plate 300 is also easier.

[0041] The dustproof ring 400 is arranged in the stepped through hole 301 and forms a first sealing surface 304 with the first contact face 303. The dustproof ring 400 has a second contact face 401, and the second contact face 401 forms a second sealing surface 402 with the outer side face of the bearing inner ring 101. In this embodiment, the dustproof ring 400 is improved on the basis of the conventional dustproof ring 400, and the dustproof ring 400 with the second contact face 401 is processed. After assembly is completed, the dustproof ring 400 is located in the stepped through hole 301 and cooperates with the first contact face 303. The larger area end face of the dustproof ring 400 faces the stepped through hole 301, and the dustproof ring 400 cooperates with the first contact face 303 to form the first sealing surface 304. The horizontal face of the first contact face 303 cooperates with the larger area end face of the dustproof ring 400, and the vertical circumferential face of the first contact face 303 cooperates with the outer side circumferential face of the dustproof ring 400 to form two sealing surfaces, which further avoids dust intrusion.

[0042] The second contact surface 401 is a spherical surface matched with the outer surface of the bearing inner ring 101. The dustproof ring 400 is in abutment with the bearing outer ring 102. After assembly, the second contact surface 401 of the dustproof ring 400 is matched with the spherical outer surface of the bearing inner ring 101 to form a second sealing surface 402, and the end surface with a smaller area of the dustproof ring 400 is in elastic abutment with the end surface of the bearing outer ring 102 to form a seal. In combination with the effect of the first sealing surface 304, the dustproof ring 400 can effectively prevent dust from entering the matching surface between the bearing inner ring 101 and the bearing outer ring 102 and the matching surface between the bearing outer ring 102 and the ear ring 200.

[0043] It should be noted that the thickness of the dustproof ring 400 needs to have a corresponding relationship with the vertical size of the first contact surface 303. Since the dustproof ring 400 is made of elastic material, the actual thickness thereof can be equal to or slightly larger than the vertical size of the first contact surface 303. In this way, it can be ensured that the dustproof ring 400 is in close contact with the first contact surface 303 after assembly, and the first sealing surface 304 will not fail.

[0044] The inner diameter of the stepped through hole 301 is larger than the inner diameter of the dustproof ring 400. The dustproof ring 400 is provided with a reserved surface 403 on the surface where the second contact surface 401 is located, and the reserved surface 403 forms a reserved space 404 with the outer surface of the bearing inner ring 101. The inner diameter of the stepped through hole 301 is larger than the inner diameter of the dustproof ring 400, so as to avoid that the rod member penetrating the bearing inner ring 101 rubs and frictions against the stepped through hole 301 when it is tilted to rotate, thereby causing damage between the two parts. Meanwhile, the reserved surface 403 is processed on the second contact surface 401 of the dustproof ring 400, so as to improve the tilting angle range of the rod member penetrating the bearing inner ring 101, and avoid that the rod member is pressed against the corner of the sealing ring when it is tilted, thereby causing the second sealing surface 402 to fail.

[0045] The joint bearing dustproof structure of the utility model can effectively prevent dust from entering the joint bearing, and is especially suitable for use in harsh environments. Meanwhile, the joint bearing dustproof structure in the embodiment has a simple overall structure, fewer component parts, low production cost, and is convenient to install. The post-maintenance of the dustproof structure is also simple and convenient, that is, the joint bearing and the dustproof ring located in the ear ring through hole can be removed by only disassembling the screw between the pressing plate and the ear ring, the internal environment can be cleaned, and the dustproof ring can be optionally replaced and fastened by the screw to reinstall the joint bearing and the pressing plate. The joint bearing dustproof structure can be directly installed on a common joint bearing to cope with various scenes.

[0046] The above is the preferred embodiment of the utility model, for explaining the utility model and the effect produced, it should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle described in the utility model, can be expected to improve and modify it, these improvements and modifications also in the protection scope of the utility model.

Claims

1. A joint bearing anti-fouling structure comprising a joint bearing including a bearing inner ring and a bearing outer ring, the bearing inner ring being rotationally connected inside the bearing inner ring, characterized by, The ear ring has a through hole and a built-in joint bearing, and the pressing plate is fixedly connected at two ends of the ear ring respectively and fixes the joint bearing in the through hole of the ear ring, and a dustproof ring is arranged between the pressing plate and the joint bearing.

2. The joint bearing anti-fouling structure according to claim 1, characterized in that, The pressing plate has a stepped through hole with a first contact surface and a positioning protrusion embedded in the through hole of the ear ring.

3. The joint bearing anti-fouling structure according to claim 2, characterized in that, The dustproof ring is arranged in the stepped through hole and forms a first sealing surface with the first contact surface, and the dustproof ring has a second contact surface which forms a second sealing surface with an outer surface of the bearing inner ring.

4. The joint bearing anti-fouling structure according to claim 3, characterized in that, The second contact surface is a spherical surface matched with the outer surface of the bearing inner ring.

5. The joint bearing anti-fouling structure according to claim 4, wherein The dustproof ring is provided with a reserved surface on a surface where the second contact surface is located, and the reserved surface forms a reserved space with the outer surface of the bearing inner ring.

6. The joint bearing anti-fouling structure according to claim 3, wherein The positioning protrusion abuts against an end surface of the bearing outer ring, and the dustproof ring abuts against the bearing outer ring.

7. The joint bearing anti-fouling structure according to claim 3, wherein An inner diameter size of the stepped through hole is greater than an inner diameter size of the dustproof ring.

8. A joint bearing anti-fouling structure according to any one of claims 2 to 7, characterized in that The first contact surface is in an L shape.

9. The joint bearing anti-fouling structure according to claim 1, wherein The pressing plate is fixedly connected with the ear ring through a screw.

10. The joint bearing anti-fouling structure according to claim 1, wherein An outer surface of the bearing inner ring and an outer surface of the bearing outer ring are both provided with an oil storage groove.

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