Bearing with high sealing performance and damping function
By employing S-shaped rubber supports and limiting grooves in the bearing, the problems of bearing sealing and vibration attenuation are solved, achieving high sealing and shock absorption effects, and improving the bearing's operational stability and lubrication effect.
Patent Information
- Application Number
- CN202522660536.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-12-16
AI Technical Summary
Traditional bearings have weak sealing in the area between the cage and the end cap, and lack effective vibration damping methods, leading to lubricant leakage and vibration transmission problems.
The design employs rubber support components with an S-shaped radial cross-section. An inclined surface guides the return flow of lubricating oil, and the displacement of the rubber support components is constrained by limiting grooves and annular protrusions, forming a sealed chamber to improve sealing and shock absorption.
It achieves high sealing performance of the bearing, preventing lubricant leakage and external contaminant intrusion, while effectively absorbing and damping vibration, improving operational stability and reducing noise.
Smart Images
Figure CN223806461U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bearing sealing technical field, especially in a kind of bearing with high sealing property and shock-absorbing function simultaneously. BACKGROUND
[0002] Bearing is the key basic piece in mechanical equipment, and its sealing performance and running stability directly affect the service life and reliability of equipment, for the bearing running under high speed, high load, impact vibration or severe environment, not only require it to have excellent sealing property to keep internal lubrication, prevent external pollutants from invading, but also require it to effectively buffer and absorb vibration and impact generated in operation, to reduce operating noise, improve running stability and protect adjacent components.
[0003] Traditional bearing sealing mainly focuses on solving dustproof and leakage prevention problem, however, there is usually a structural gap between the retainer and end cover of bearing, this area is often ignored or only simple shielding treatment in traditional design, it can become a weak link of lubricant leakage and pollutant invasion, at the same time, traditional sealing structure lacks effective damping means for radial and axial vibration generated during bearing operation, especially the vibration transmitted through retainer.
[0004] In prior art, there are also some attempts to set elastic elements inside bearing to improve performance, but these schemes are often single-function, some focus on auxiliary sealing, but lack lubricating oil guiding function; some focus on shock absorption, but the structure of elastic element used is complex and occupies large internal space, leading to structural redundancy or ineffective effect. SUMMARY
[0005] The utility model aims at providing a kind of bearing with high sealing property and shock-absorbing function simultaneously, integrates dynamic sealing, lubrication guiding and shock absorption, can simultaneously and cooperatively solve the dynamic sealing problem between retainer and end cover, lubricating oil backflow problem, and vibration absorption and attenuation problem during operation, and structure is simple, easy to realize.
[0006] The above technical purpose of the utility model is realized by the following technical scheme: a kind of bearing with high sealing property and shock-absorbing function simultaneously, including inner ring, outer ring, end cover respectively installed in the two sides of inner ring and outer ring, and rolling body set between inner ring and outer ring, track groove accommodating rolling body is respectively set on inner ring and outer ring, retaining frame is set on rolling body, sealing chamber is formed between retaining frame and end cover, rubber support is set in sealing chamber, the radial section of rubber support is S-shaped, one end of rubber support is in abutment with retaining frame, the other end of rubber support is in abutment with end cover, so that sealing chamber is kept sealed between retaining frame and end cover;
[0007] The first contact part is arranged in an inclined manner and forms an inclined surface for guiding the lubricating oil inside the bearing to flow back to the rolling body and the track groove.
[0008] The inner ring is provided with a first annular limiting groove for accommodating the rubber support member, and a first limiting block is arranged on the first annular limiting groove. The outer ring is provided with an annular protrusion, and the annular protrusion and the end cover jointly define a second annular limiting groove for accommodating the rubber support member.
[0009] By adopting the above technical scheme, the high sealing performance of the bearing is realized, the invasion of external pollutants and the leakage of internal lubricating oil are prevented, the elastic property of the rubber material is utilized to achieve good shock absorption and buffering effect, the running stability of the bearing is improved, the lubrication effect is improved, the friction loss is reduced, the first contact part is kept in an inclined state, the working stability of the rubber support member is improved, and the deviation or falling caused by vibration or pressure is avoided.
[0010] The first limiting block and the second limiting block are arranged in an axial direction.
[0011] By adopting the above technical scheme, the axial fixation of the rubber support member is enhanced, the movement of the rubber support member during the operation of the bearing is prevented, the structural stability of the first contact part is further improved, the first contact part is kept in an inclined state, and the guiding effect of the lubricating oil is ensured.
[0012] The first limiting block and the second limiting block are arranged in an axial direction.
[0013] By adopting the above technical scheme, the first contact part is kept in an inclined state, the working stability of the rubber support member is improved, and the deviation or falling caused by vibration or pressure is avoided.
[0014] The first annular limiting groove and the second annular limiting groove jointly define the sealing chamber.
[0015] The outer ring is provided with a third annular limiting groove for accommodating the end cover, and the rubber support member holds the end cover in the third annular limiting groove.
[0016] By adopting the technical scheme, the end cover is firmly installed, the assembly gap is compensated by the elasticity of the rubber, and the sealing performance and overall structural rigidity of the bearing end are improved.
[0017] The end cover is further provided with annular convex ribs on one side facing the sealing chamber, and the deformed part of the second contact portion is clamped to the annular convex ribs when the second contact portion is deformed.
[0018] By adopting the technical scheme, a local interference fit is formed, the combination tightness between the end cover and the rubber support is enhanced, the sealing effect is further improved, and the vibration transmission is inhibited.
[0019] The end cover is further provided with annular convex ribs on one side facing the sealing chamber, and the deformed part of the second contact portion is clamped to the annular convex ribs when the second contact portion is deformed.
[0020] By adopting the technical scheme, the contact area and clamping point of the rubber support and the end cover are increased, the stress distribution is more uniform, the sealing is more reliable, and the damping effect on the axial vibration is enhanced.
[0021] The end cover is further provided with annular convex ribs on one side facing the sealing chamber, and the deformed part of the second contact portion is clamped to the annular convex ribs when the second contact portion is deformed.
[0022] By adopting the technical scheme, the rubber support has better elastic deformation capability in the radial direction, can adapt to the relative displacement and pressure change between the inner ring, the outer ring and the end cover, maintains the sealing while providing better shock absorption and buffering performance.
[0023] In summary, the utility model has the following beneficial effects:
[0024] 1. The rubber support is arranged in the sealing chamber, the radial section of the rubber support is S-shaped, and the rubber support comprises a first contact portion abutting against the retainer and a second contact portion abutting against the end cover, the first contact portion seals one end of the sealing chamber close to the retainer, the second contact portion seals one end of the sealing chamber close to the end cover, thereby preventing the lubricant in the bearing from leaking into the sealing chamber and preventing contaminants from invading the sealing chamber from the outside of the end cover, the rubber support further comprises a transition portion connected between the first contact portion and the second contact portion, and the transition portion and the first contact portion and the second contact portion form a gap space therebetween, due to the existence of the gap space, a buffer zone is formed, the transition portion of the rubber support can produce greater and low-rigidity elastic deformation when bearing axial or radial vibration and impact, thereby actively and effectively absorbing and dissipating energy, reducing the vibration amplitude transmitted to the inner and outer rings of the bearing and the end cover, and improving the overall shock absorption and noise reduction performance of the bearing.
[0025] 2. The first contact part is arranged in an inclined manner and forms an inclined surface for guiding the lubricating oil in the bearing to flow back to the rolling element and the raceway groove, thereby effectively improving the lubrication effect and reducing the friction loss.
[0026] 3. The first annular limiting groove is arranged on the inner ring to accommodate the rubber support member, and the first limiting block is arranged on the first annular limiting groove. One end of the first contact part is abutted between the groove wall of the first annular limiting groove and the first limiting block, so that the first contact part is kept in an inclined state. The annular protrusion is formed on the outer ring and cooperates with the end cover to jointly define the second annular limiting groove for accommodating the rubber support member. The opening of the second annular limiting groove is arranged opposite to the opening of the first annular limiting groove. The first annular limiting groove and the second annular limiting groove jointly constrain the axial displacement path of the rubber support member, thereby improving the working stability of the rubber support member and avoiding the deviation or falling caused by vibration or pressure. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 is a perspective view of the utility model.
[0028] Figure 2 is a sectional view of the utility model.
[0029] Figure 3 is a sectional view of the utility model Figure 2 is an enlarged view of A in the utility model.
[0030] Figure 4 is a sectional view of the utility model after omitting the rubber support member.
[0031] Figure 5 is a schematic view of the rubber support member of the utility model.
[0032] In the figure: 1, inner ring; 11, first annular limiting groove; 111, first limiting block; 2, outer ring; 21, annular protrusion; 22, second annular limiting groove; 221, second limiting block; 23, third annular limiting groove; 3, end cover; 31, annular rib; 4, rolling element; 5, raceway groove; 6, retainer; 7, sealing chamber; 8, rubber support member; 81, first contact part; 82, second contact part; 83, transition part; 84, gap space; 85, inclined surface. DETAILED DESCRIPTION
[0033] The utility model will be further described below in combination with the drawings.
[0034] A bearing with high sealing property and shock absorption function simultaneously, such as Figures 1-5As shown, it comprises an inner ring 1, an outer ring 2, end covers 3 respectively installed on both sides of the inner ring 1 and the outer ring 2, and rolling elements 4 arranged between the inner ring 1 and the outer ring 2, the inner ring 1 and the outer ring 2 are respectively provided with track grooves 5 accommodating the rolling elements 4, the rolling elements 4 are provided with a retainer 6, a sealing chamber 7 is formed between the retainer 6 and the end cover 3, a rubber support 8 is arranged in the sealing chamber 7, the radial section of the rubber support 8 is S-shaped, which comprises a first contact part 81 abutting against the retainer 6, and a second contact part 82 abutting against the end cover 3, the first contact part 81 seals one end of the sealing chamber 7 close to the retainer 6, and the second contact part 82 seals one end of the sealing chamber 7 close to the end cover 3, thereby preventing the lubricant inside the bearing from leaking into the sealing chamber 7, and preventing contaminants from invading the sealing chamber 7 from the outside of the end cover 3, the sealing mode is to block the gap between the retainer 6 and the sealing chamber 7 and the gap between the end cover 3 and the sealing chamber 7 by using the deformation characteristics of the rubber support 8, the specific sealing process and principle are conventional technical means, which will not be described in detail here; the rubber support 8 further comprises a transition part 83 connected between the first contact part 81 and the second contact part 82, the first contact part 81, the second contact part 82 and the transition part 83 are integrally formed, and their radial sections jointly form an S shape, and the transition part 83 forms a gap space 84 with the first contact part 81 and the second contact part 82 respectively, due to the existence of the gap space 84, a buffer zone can be formed, which allows the transition part 83 of the rubber support 8 to produce greater and low-rigidity elastic deformation when subjected to axial or radial vibration and impact, thereby actively and effectively absorbing and dissipating energy, reducing the vibration amplitude transmitted to the inner and outer rings 2 and the end cover 3 of the bearing, and improving the overall shock absorption and noise reduction performance of the bearing. Through the above structural design, high sealing performance is realized in the bearing, external contaminants are prevented from invading and internal lubricating grease is prevented from leaking, and the elastic properties of the rubber material are used to play a good shock absorption and buffering role, and the running stability of the bearing is improved.
[0035] The first contact part 81 is arranged obliquely and forms an inclined surface 85 for guiding the lubricating oil inside the bearing to flow back to the rolling elements 4 and the track grooves 5, specifically, when the bearing rotates, the lubricating oil inside the bearing splashes outward under the action of the outer ring 2 and the end cover 3, and the lubricating oil converges under the blockage and guidance of the inclined surface 85, and falls back to the rolling elements 4 and the track grooves 5 under the action of gravity and surface tension, avoiding the occurrence of stagnation or slow backflow. By arranging the inclined surface 85, the lubrication effect is effectively improved, and the friction loss is reduced.
[0036] The inner ring 1 is provided with a first annular limiting groove 11 for accommodating the rubber support 8, and a first limiting block 111 is integrally formed on the first annular limiting groove 11. One end of the first contact part 81 abuts between the groove wall of the first annular limiting groove 11 and the first limiting block 111, so that the first contact part 81 remains in an inclined state. The outer ring 2 is provided with an annular protrusion 21, and the annular protrusion 21 and the end cover 3 jointly define a second annular limiting groove 22 for accommodating the rubber support 8. The opening of the second annular limiting groove 22 is arranged opposite to the opening of the first annular limiting groove 11, and the first annular limiting groove 11 and the second annular limiting groove 22 jointly constrain the axial displacement path of the rubber support 8. Through the above structural design, the working stability of the rubber support 8 is improved, and deviation or falling caused by vibration or pressure is avoided.
[0037] Preferably, the second annular limiting groove 22 is provided with a second limiting block 221, which is arranged in axial opposition to the first limiting block 111. The first contact part 81 is clamped between the first limiting block 111 and the second limiting block 221. Through the above structural design, the axial fixation of the rubber support 8 is enhanced, the movement of the rubber support 8 during bearing operation is prevented, and the structural stability of the first contact part 81 is further improved, so that the first contact part 81 always remains in an inclined state and the guiding effect of the lubricating oil is ensured.
[0038] Preferably, the first limiting block 111 and the second limiting block 221 are arranged in axial misalignment, so that the center line of the two is arranged at an angle to the axis of the bearing. Through the above structural design, the axial fixation of the rubber support 8 is enhanced, the movement of the rubber support 8 during bearing operation is prevented, and the structural stability of the first contact part 81 is further improved, so that the first contact part 81 always remains in an inclined state and the guiding effect of the lubricating oil is ensured.
[0039] Preferably, the first annular limiting groove 11 and the second annular limiting groove 22 jointly define the sealing chamber 7, i.e. the sealing chamber 7 is located in the region where the projection faces of the first annular limiting groove 11 and the second annular limiting groove 22 are located.
[0040] Preferably, the outer ring 2 is provided with a third annular limiting groove 23 for accommodating the end cover 3. The rubber support 8 holds the end cover 3 in the third annular limiting groove 23. The rubber support 8 always remains in a squeezed state in the use state, i.e. the rubber support 8 is in interference fit with the end cover 3, so that the rubber support 8 always applies an axial force to the end cover 3. Through the above structural design, the end cover 3 is stably installed, and the assembly gap is compensated by the elasticity of the rubber, so that the sealing performance and the overall structural rigidity of the bearing end are improved.
[0041] Preferably, one side of the end cover 3 facing the sealing chamber 7 is provided with an annular rib 31, when the second contact part 82 is deformed, the deformed part embraces the annular rib 31, in particular, the deformed part of the second contact part 82 is flush with the end face of the end cover 3. By arranging the annular rib 31, a local interference fit is formed, the combination between the end cover 3 and the rubber support 8 is enhanced, the sealing effect is further improved and the vibration transmission is inhibited.
[0042] Preferably, the annular rib 31 is arranged in two, the two annular ribs 31 are arranged in axial direction and coaxially arranged with the bearing. By the above structure, the contact area and the embracing point between the rubber support 8 and the end cover 3 are increased, the stress distribution is more uniform, the sealing is more reliable, and the damping effect on the axial vibration is enhanced.
[0043] Preferably, the rubber support 8 is a circular column, the gap space 84 is formed by two inner recess grooves arranged on the outer circumferential wall, as a preferred embodiment, the model structure of the rubber support 8 can be designed in advance in the injection mold, and the rubber support 8 with the inner recess groove is integrally injection molded. By the above structure, the rubber support 8 has better elastic deformation ability in the radial direction, can adapt to the relative displacement and pressure change between the inner ring 1, the outer ring 2 and the end cover 3, maintains the sealing while providing better shock absorption performance.
[0044] The above is only a preferred embodiment of the present application, therefore, equivalent changes or modifications made according to the structure, features and principles of the present application patent application range are included in the present application patent application range.
Claims
1. A bearing with high sealing and damping functions, comprising an inner ring (1), an outer ring (2), end covers (3) respectively installed on both sides of the inner ring (1) and the outer ring (2), and rolling elements (4) arranged between the inner ring (1) and the outer ring (2), wherein track grooves (5) for accommodating the rolling elements (4) are respectively formed on the inner ring (1) and the outer ring (2), and a retainer (6) is arranged on the rolling element (4), characterized in that: A sealing chamber (7) is formed between the cage (6) and the end cover (3), and a rubber support (8) is arranged in the sealing chamber (7), the radial section of the rubber support (8) is S-shaped, which includes a first contact part (81) abutting against the cage (6) and a second contact part (82) abutting against the end cover (3), the first contact part (81) and the second contact part (82) respectively enable the sealing chamber (7) to be sealed between the cage (6) and the end cover (3), and the rubber support (8) further includes a transition part (83) connected between the first contact part (81) and the second contact part (82), and the transition part (83) and the first contact part (81) and the second contact part (82) respectively form a gap space (84) therebetween; The first contact part (81) is arranged obliquely and forms an inclined surface (85) for guiding the lubricating oil in the bearing to flow back to the rolling body (4) and the track groove (5); The inner ring (1) is circumferentially provided with a first annular limiting groove (11) for accommodating the rubber support (8), and a first limiting block (111) is arranged on the first annular limiting groove (11), and the first contact part (81) abuts between the groove wall of the first annular limiting groove (11) and the first limiting block (111), and an annular protrusion (21) is formed on the outer ring (2), and the annular protrusion (21) and the end cover (3) jointly define a second annular limiting groove (22) for accommodating the rubber support (8), and the first annular limiting groove (11) and the second annular limiting groove (22) jointly constrain the axial displacement path of the rubber support (8).
2. The bearing with high sealing and damping function according to claim 1, characterized in that: A second limiting block (221) is arranged on the second annular limiting groove (22), and the second limiting block (221) and the first limiting block (111) are arranged in axial opposition, and the first contact part (81) is clamped between the first limiting block (111) and the second limiting block (221).
3. The bearing with high sealing and damping function according to claim 2, characterized in that: The first limiting block (111) and the second limiting block (221) are arranged in axial misalignment, and the center line of the two is arranged at an angle to the axis of the bearing.
4. The bearing with high sealing and damping function according to claim 1, characterized in that: The first annular limiting groove (11) and the second annular limiting groove (22) jointly define the sealing chamber (7).
5. The bearing with high sealing and damping function according to claim 1, characterized in that: The outer ring (2) is provided with a third annular limiting groove (23) for accommodating the end cover (3), and the rubber support (8) holds the end cover (3) on the third annular limiting groove (23).
6. The bearing with high sealing and damping function according to claim 1, characterized in that: The side of the end cover (3) facing the sealing chamber (7) is provided with an annular protruding rib (31), and when the second contact part (82) deforms, the deformed part thereof is tightly held on the annular protruding rib (31).
7. The bearing with high sealing and damping function according to claim 6, characterized in that: The annular protruding rib (31) is arranged in two, and the two annular protruding ribs (31) are arranged in axial spacing and coaxially arranged with the bearing.
8. The bearing with high sealing and damping function according to claim 1, characterized in that: The rubber support (8) is circular-cylindrical, and the gap space (84) is formed by two inner concave grooves staggered on the outer circumferential wall thereof.