Waterproof and dustproof ring of knuckle bearing
By designing the internal and external double-layer sealing structure of joint bearing waterproof dust ring and stable positioning of the slot, the existing sealing parts have been solved, and the sealing effect and short service life are shortened in high temperature and harsh environments, achieving more efficient sealing effect and longer service life.
Patent Information
- Application Number
- CN202422374573.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-27
AI Technical Summary
Nowadays, when used in high temperature and harsh environments, the sealing effect is poor, the service life is short, and it is prone to corrosion and leak.
A joint bearing waterproof dust ring is designed, adopting a double-layer sealing structure inside and outside. The main lip and the secondary lip are located on the inside and outside respectively, forming an outer chamber, reducing the squeeze pressure between the lip and the spherical surface, improving the sealing effect, and stably positioning through the slot structure.
It achieves effective sealing in high temperature and harsh environments, extends service life, reduces corrosion risks, and improves the stability of the sealing effect.
Smart Images
Figure CN223019218U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of seals, in particular to a waterproof and dustproof ring for a spherical plain bearing. Background Art
[0002] A spherical plain bearing is a spherical sliding bearing, and its sliding contact surfaces are an inner spherical surface and an outer spherical surface, which can rotate and swing at any angle during movement. It is made by using a variety of special process treatment methods such as surface phosphating, flanging, padding, spraying, etc. The spherical plain bearing has the characteristics of large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, good lubrication, etc.
[0003] There are two forms of spherical plain bearings, with and without seals. At present, in China, for those with seals, single-lip seals made of polyester materials are mostly selected. The following main problems exist when using single-lip seals:
[0004] 1. Because there is only a single-lip seal, in order to ensure the sealing performance, the lip needs to be closely attached to the spherical surface, and the extrusion force on the lip is relatively large. At the same time, its working condition is at an ambient temperature of 70 °C, and the compression set within 24 hours is as high as more than 50%. Over time, the lip will have a permanent compression set, resulting in the lip being unable to hold the spherical surface tightly, and it cannot achieve a good dustproof and waterproof effect, resulting in a short service life of the seal;
[0005] 2. When the single-lip structure is used in some working conditions with harsh environments such as a lot of dust, rain, oil, and grease, the lip is always in contact with dust and oil, and it is easily corroded, resulting in seal leakage problems. Content of the Utility Model
[0006] Aiming at the deficiencies of the prior art, the utility model provides a waterproof and dustproof ring for a spherical plain bearing, which has the characteristics of good sealing effect and long service life.
[0007] To achieve the above object, the utility model provides the following technical solutions:
[0008] A waterproof and dustproof ring for a spherical plain bearing, characterized in that: it includes a base ring, and on the inner side wall of the base ring, there are a main lip and a secondary lip that extend towards the center of the base ring and incline outwards. The main lip is located outside the secondary lip, and the main lip and the secondary lip are arranged separately, forming an outer chamber between the two;
[0009] On the outer side wall of the base ring, there is a convex portion, and the convex portion and the outer side wall of the base ring cooperate to form a clamping groove structure.
[0010] Preferably, the thickness of the main lip is greater than the thickness of the secondary lip.
[0011] Preferably, the inner diameter of the main lip is smaller than the inner diameter of the secondary lip.
[0012] Preferably, the convex portion is a semi-circular structure.
[0013] Preferably, the thicknesses of the main lip and the secondary lip gradually increase from the end away from the base ring to the end corresponding to the base ring.
[0014] The advantages of the present utility model are as follows:
[0015] 1. The cooperation of the main lip and the secondary lip can achieve a double-layer sealing effect inside and outside. Compared with the traditional single-lip seal, when achieving the same sealing effect, the extrusion force between the lip and the spherical surface can be reduced, and the deformation amounts of the main lip and the secondary lip can be reduced. Thus, the deformation allowance during the operation of the lip can be increased, enabling the lip to better adapt to the working conditions where the compression deformation is up to more than 50% within 24 hours at an ambient temperature of 70 °C, and improving the service life.
[0016] 2. When working in a harsh environment, the main lip is located outside the inner lip. Dust and oil in the environment will only contact the main lip and will not contact or hardly contact the secondary lip. Therefore, the probability of corrosion of the secondary lip is greatly reduced, and it can achieve an effective sealing effect for a long time, improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of the waterproof and dust-proof ring for a spherical plain bearing provided in this embodiment;
[0018] Figure 2 is an installation schematic diagram of the waterproof and dust-proof ring for a spherical plain bearing provided in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] Combined with Figures 1 to 2 to further illustrate the waterproof and dust-proof ring for a spherical plain bearing of the present utility model.
[0020] A waterproof and dust-proof ring for a spherical plain bearing, characterized in that: it includes a base ring 1, and integrally formed on the inner side wall of the base ring 1 are a main lip 14 and a secondary lip 13 that extend towards the center of the base ring 1 and incline outwards. The outer end of the base ring is the end facing the environment when it is installed between the inner spherical surface 3 and the outer spherical surface 2. The main lip 14 is located outside the secondary lip 13, and the main lip 14 and the secondary lip 13 are arranged separately, forming an outer chamber 4 therebetween. Integrally formed on the outer side wall 12 of the base ring 1 is a convex portion 11, and the convex portion 11 is located near the inner end of the base ring 1, so that it cooperates with the outer side wall 12 on the side of the base ring 1 close to the outer end to form a clamping groove structure 10.
[0021] During use, the waterproof and dust-proof ring is installed between the inner spherical surface 3 and the outer spherical surface 2, that is, the clamping groove structure 10 cooperates with the outer spherical surface 2, and the inner ends of the main lip 14 and the secondary lip 13 abut against the inner spherical surface 3, achieving a sealing effect on the inner spherical surface 3 and the outer spherical surface 2.
[0022] Specifically, the outer spherical surface 2 has a groove 21, and the protruding portion 11 in the card slot structure 10 is snapped into the groove 21. At the same time, the outer side wall 12 of the base ring 1 in the card slot structure 10 abuts and supports on the outer spherical surface 2, so that the waterproof and dustproof ring is stably clamped and positioned, that is, it can be stably positioned both axially and radially. The two lips are distributed inside and outside. An outer chamber 4 is formed between the main lip 14 and the secondary lip 13, and an inner chamber 5 is formed between the secondary lip 13, the inner spherical surface 3 and the outer spherical surface 2. The inner chamber 5 and the outer chamber 4 are used to accommodate lubricating oil, and the lubricating oil is sealed between the inner spherical surface 3 and the outer spherical surface 2 to achieve a lubricating effect. In this structure, even if the main lip has a leakage situation, impurities will only enter the outer chamber 4 and cannot enter the inner chamber 5.
[0023] The inner diameter of the main lip 14 is smaller than the inner diameter of the secondary lip 13 to adapt to the shape of the inner spherical surface 3.
[0024] The thickness of the main lip 14 is greater than the thickness of the secondary lip 13. The main lip 14 plays a main sealing role and is in contact with the external environment at the same time. Therefore, increasing the thickness can improve its service life. Secondly, the secondary lip 13 is located inside, with a smaller radial dimension, and a thinner thickness is beneficial to its deformation to achieve an effective sealing effect.
[0025] The thicknesses of the main lip 14 and the secondary lip 13 gradually become thicker from the end far away from the base ring 1 to the end corresponding to the base ring 1. This structure can increase the structural strength of the main lip 14 and the secondary lip 13, and at the same time can avoid the problem that the main lip 14 and the secondary lip 13 are too soft and undergo excessive deformation.
[0026] The cross-section of the protruding portion 11 is a semi-circular structure, and the semi-circular structure can facilitate the assembly of the card slot structure 10 onto the outer spherical surface 2.
[0027] Unless otherwise specified, in the present utility model, if there are terms such as "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated 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, the terms describing the orientation or positional relationship in the present utility model are only used for exemplary illustration and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood by combining the drawings and according to the specific situation.
[0028] Unless otherwise clearly defined and limited, in this utility model, if there are terms such as "arranged", "connected" and "coupled", they 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific situations.
[0029] The above are only the preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the concept of this utility model belong to the protection scope of this utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of this utility model, several improvements and refinements should also be regarded as the protection scope of this utility model.
Claims
1. A waterproof and dustproof ring for a spherical bearing, characterized by: The base ring comprises a main lip and a secondary lip extending toward the center of the base ring and tilted outward on the inner side wall of the base ring, wherein the main lip is located outside the secondary lip, and the main lip is isolated from the secondary lip to form an outer chamber between the two. A protrusion is provided on the outer side wall of the base ring, and the protrusion cooperates with the outer side wall of the base ring to form a clamping groove structure.
2. The waterproof and dustproof ring of the spherical bearing according to claim 1 is characterized by: The thickness of the main lip is greater than the thickness of the auxiliary lip.
3. The waterproof and dustproof ring of the spherical bearing according to claim 1 is characterized by: The inner diameter of the main lip is smaller than the inner diameter of the auxiliary lip.
4. The waterproof and dustproof ring of the spherical bearing according to claim 1 is characterized by: The raised portion is a semicircular structure.
5. The waterproof and dustproof ring of the spherical bearing according to claim 1 is characterized by: The thickness of the main lip and the auxiliary lip gradually increases from the end far away from the base ring to the end corresponding to the base ring.