Knuckle bearing and mounting structure thereof

Abstract

The knuckle bearing comprises an inner ring and an outer ring which are matched with each other, embedding grooves are formed in the end faces of the two ends of the outer ring, and a sealing ring is embedded in each embedding groove; the bearing further comprises two annular sealing gaskets, and the two annular sealing gaskets are arranged at the two ends of the inner ring in a sleeving mode, axially and tightly abut against the end face of the outer ring and seal the corresponding embedding grooves. The sealing ring and the annular sealing gasket are matched to form a double-sealing structure, the sealing effect is effectively improved, the annular sealing gasket is used for abutting against the end face of the outer ring and sealing the corresponding embedding groove, and the problem that the sealing ring falls off when the bearing is impacted by external impact force can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a spherical bearing and a mounting structure thereof. Background Art

[0002] Chinese document CN220523071U (application date: August 22, 2023) discloses a spherical joint bearing, comprising an outer ring and a spherical inner ring that can rotate within the outer ring, and also comprising a seal, wherein the outer ring is provided with an embedding groove at both ends along the axial direction, and one end of the seal is provided with a mounting portion, and the end faces corresponding to the two embedding grooves are axially abutted against the mounting portion located therein, and the mounting portion is provided with an anti-slip protrusion, which is protruding from the mounting portion and is located outside the end faces of the two embedding grooves that are opposite to each other, and the other end of the seal is obliquely provided with a first sealing lip that cooperates with the inner ring for contact sealing. However, the spherical joint bearing of this technical solution is only provided with a single sealing structure. Under some complex working conditions, foreign matter such as dust, mud and sand from the outside may still enter the bearing, and when the bearing is subjected to external impact force, the seal may even be at risk of falling off, resulting in seal failure. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a joint bearing, which forms a double sealing structure by cooperating with a sealing ring and an annular sealing gasket, effectively improving the sealing effect. In addition, by using the annular sealing gasket to press against the end face of the outer ring and seal the corresponding embedded groove, it can also prevent the sealing ring from falling off when the bearing is subjected to external impact force.

[0004] To achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0005] A spherical joint bearing comprises an inner ring and an outer ring which cooperate with each other, wherein an embedding groove is provided at the end faces at both ends of the outer ring, and a sealing ring is embedded in each of the two embedding grooves; and further comprises two annular sealing gaskets which are configured to be respectively sleeved at the two ends of the inner ring and axially tightly pressed against the end face of the outer ring and seal the corresponding embedding grooves.

[0006] Furthermore, the annular sealing gasket is a polyurethane annular sealing gasket, and a plurality of honeycomb pores are arranged in the annular sealing gasket to form a honeycomb structure.

[0007] Furthermore, the annular sealing gasket is configured to absorb lubricating oil into the honeycomb pores inside the annular sealing gasket through lubricating oil impregnation treatment.

[0008] Furthermore, the sealing ring is made of TPEE material.

[0009] Furthermore, an axial through hole for installing a pin is provided in the inner ring.

[0010] Further, an inner groove is formed on the inner side wall of the embedding groove. One end of the sealing ring is formed with an embedding and mounting portion adapted to the inner groove, and the other end is formed with a sealing lip for sealing cooperation with the outer spherical surface of the inner ring. Moreover, a pressing portion for pressing cooperation with the annular sealing gasket is formed between the mounting portion and the sealing lip.

[0011] Based on the same inventive concept, the present utility model further provides an installation structure of a spherical plain bearing, including a bearing seat, a stop member, and any one of the above-mentioned spherical plain bearings. An axial stepped through hole is formed in the bearing seat, the stop member is detachably installed in the stepped through hole, the spherical plain bearing is integrally placed into the stepped through hole of the bearing seat, and the annular sealing gasket at one end of the spherical plain bearing presses against the stepped surface of the stepped through hole, and the annular sealing gasket at the other end of the spherical plain bearing is pressed and fixed by the stop member.

[0012] Further, the stop member is of an open retaining ring structure, and an annular embedding groove for installing the open retaining ring is formed on the inner wall of the stepped through hole.

[0013] The above technical solution has the following advantages or beneficial effects:

[0014] In the spherical plain bearing and its installation structure of the present utility model, a double-sealing structure is formed by the cooperation of the sealing ring and the annular sealing gasket, effectively improving the sealing effect. Moreover, by using the annular sealing gasket to press against the end face of the outer ring and seal the corresponding embedding groove, the problem of the sealing ring falling off caused by the external impact force on the bearing can also be prevented. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the spherical plain bearing according to an embodiment of the present utility model.

[0016] Figure 2 is a schematic structural diagram of the installation structure of the spherical plain bearing according to an embodiment of the present utility model.

[0017] Label Description:

[0018] 1, inner ring; 2, outer ring; 3, sealing ring; 4, annular sealing gasket; 5, pin shaft; 6, bearing seat; 7, stop member; 11, axial through hole; 21, embedding groove; 31, mounting portion; 32, sealing lip; 33, pressing portion. Detailed Embodiment

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present utility model.

[0021] Please refer to the attached Figure 1 , an embodiment of the present utility model provides a spherical plain bearing, which includes two annular sealing gaskets 4 and an inner ring 1 and an outer ring 2 that cooperate with each other. Embedding grooves 21 are provided at the end faces of both ends of the outer ring 2, and a sealing ring 3 is respectively embedded in the two embedding grooves 21; the two annular sealing gaskets 4 are configured to be respectively sleeved at both ends of the inner ring 1 and axially tightly press against the end faces of the outer ring 2 and seal the corresponding embedding grooves 21. It can be understood that in this embodiment, a double-sealing structure is formed by the cooperation of the sealing ring 3 and the annular sealing gasket 4, which can effectively improve the sealing effect of the bearing; and by using the annular sealing gasket 4 to press against the end face of the outer ring 2 and seal the corresponding embedding groove 21, the problem of the sealing ring 3 falling off caused by the external impact force on the bearing can also be prevented, thereby effectively improving the service stability of the spherical plain bearing.

[0022] Please refer to the attached Figure 1 , in one of the preferred embodiments, the annular sealing gasket 4 is an annular sealing gasket made of polyurethane material, and a number of honeycomb pores are arranged in the annular sealing gasket 4 to form a honeycomb structure. Preferably, the annular sealing gasket 4 is configured to absorb lubricating oil in its internal honeycomb pores through lubricating oil impregnation treatment. In this embodiment, since the annular sealing gasket 4 is made of polyurethane material to form a unique honeycomb structure, on the one hand, the honeycomb pores of the honeycomb structure can fully absorb lubricating oil after being impregnated with lubricating oil. During the use of the spherical plain bearing, it can continuously release lubricating oil, playing a role in lubricating the bearing and making the bearing have a longer service life. On the other hand, by using the unique honeycomb structure of the annular sealing gasket 4, it has excellent sound absorption, shock absorption and sound insulation properties, and can effectively absorb and disperse sound, reducing noise pollution. At the same time, the cooperation of the two annular sealing gaskets 4 also makes the spherical plain bearing have a buffering and shock absorption effect.

[0023] Please refer to the attached Figure 1, in one preferred embodiment, the sealing ring 3 is a sealing ring made of TPEE material. An axial through hole 11 for installing the pin shaft 5 is provided in the inner ring 1, and the pin shaft 5 and the axial through hole 11 are in an interference fit structure. In this embodiment, the sealing ring 3 plays a secondary sealing role in the spherical plain bearing. The sealing ring is made of a high-performance thermoplastic polyester elastomer material (TPEE). The thermoplastic polyester elastomer sealing ring can be applied to various harsh environments, such as high temperature, low temperature, humidity, corrosion, etc. It has excellent weather resistance and anti-aging performance. Moreover, the thermoplastic polyester elastomer sealing ring has good resilience and can quickly return to its original shape, thus ensuring the durability of the sealing performance. At the same time, it also has a low compression set rate and can effectively prevent dirt from entering and the leakage of lubricating liquid.

[0024] Please refer to the attached Figure 1 , in one preferred embodiment, an inner groove is provided on the inner side wall of the embedding groove 21. One end of the sealing ring 3 is formed with an embedding and mounting portion 31 adapted to the inner groove, and the other end is formed with a sealing lip 32 for sealing cooperation with the outer spherical surface of the inner ring 1. Moreover, a pressing portion 33 for pressing cooperation with the annular gasket 4 is formed between the mounting portion 31 and the sealing lip 32. In this embodiment, by using the pressing cooperation between the pressing portion 33 and the annular gasket 4, on the one hand, the sealing effect of the sealing ring 3 can be improved, and on the other hand, the installation stability of the sealing ring 3 can also be improved.

[0025] Please refer to the attached Figure 1 , attached Figure 2 , an embodiment of the present utility model further provides an installation structure of a spherical plain bearing, including a bearing seat 6, a stop member 7 and the spherical plain bearing of any one of the above embodiments. An axial stepped through hole is provided in the bearing seat 6. The stop member 7 is detachably installed in the stepped through hole. The spherical plain bearing is integrally placed into the stepped through hole of the bearing seat 6, and the annular gasket 4 on one end of the spherical plain bearing abuts against the stepped surface of the stepped through hole, and the annular gasket 4 on the other end of the spherical plain bearing is pressed and fixed by the stop member 7. During use, the annular gasket 4 does not rotate synchronously with the inner ring 1. In this embodiment, by adding two annular gaskets 4 made of honeycomb polyurethane material at both end faces of the outer ring 2, compared with the traditional steel-on-steel spherical plain bearing, it not only has a high load-bearing capacity, but also has a buffering and shock-absorbing effect. At the same time, the bearing has better sealing performance and longer service life.

[0026] Please refer to the attached Figure 1 , attached Figure 2 , in one preferred embodiment, the stop member 7 is an open retaining ring structure, and an annular embedding groove for installing the open retaining ring is provided on the inner wall of the stepped through hole.

[0027] As described above, the embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Claims

1. A spherical plain bearing, comprising an inner ring (1) and an outer ring (2) which are matched with each other. Embedding grooves (21) are formed at the end faces at both ends of the outer ring (2), and a sealing ring (3) is embedded in each of the two embedding grooves (21). It is characterized in that: It further includes two annular gaskets (4), which are configured to be respectively sleeved at both ends of the inner ring (1) and axially tightly press against the end faces of the outer ring (2) and seal the corresponding embedding grooves (21); the annular gasket (4) is a polyurethane annular gasket, and a number of honeycomb pores are arranged in the annular gasket (4) to form a honeycomb structure.

2. The articulated bearing according to claim 1, characterized in that: The annular gasket (4) is configured to absorb lubricating oil in the honeycomb pores therein through impregnation treatment with lubricating oil.

3. The articulated bearing according to claim 1, characterized in that: The sealing ring (3) is a sealing ring made of TPEE material.

4. The articulated bearing according to claim 1, wherein: An axial through hole (11) for installing a pin shaft (5) is formed in the inner ring (1).

5. The articulated bearing according to any one of claims 1 to 4, characterized in that: An inner groove is formed on the inner side wall of the embedding groove (21). One end of the sealing ring (3) is formed with an embedding and mounting portion (31) adapted to the inner groove, and the other end is formed with a sealing lip (32) for sealing cooperation with the outer spherical surface of the inner ring (1). A pressing portion (33) for pressing cooperation with the annular gasket (4) is further formed between the mounting portion (31) and the sealing lip (32).

6. An installation structure of a spherical plain bearing, characterized in that: It includes a bearing seat (6), a stop member (7) and the spherical plain bearing according to any one of claims 1 to 5. An axial stepped through hole is formed in the bearing seat (6). The stop member (7) is detachably installed in the stepped through hole. The spherical plain bearing is integrally placed in the stepped through hole of the bearing seat (6). The annular gasket (4) at one end of the spherical plain bearing presses against the step surface of the stepped through hole, and the annular gasket (4) at the other end of the spherical plain bearing is fixedly pressed by the stop member (7).

7. The mounting structure of the spherical plain bearing according to claim 6, characterized in that: The stop member (7) is of an open retaining ring structure, and an annular embedding groove for installing the open retaining ring is formed on the inner wall of the stepped through hole.

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