A damping and noise reduction structure of an elastomer bushing
By using a corrugated rubber ring and elastic layer in the elastomer bushing, combined with wear-resistant alloy contact rings and ceramic balls, the problems of poor vibration reduction and abnormal noise caused by wear in multi-directional vibration of the elastomer bushing are solved, achieving efficient vibration reduction and noise reduction.
Patent Information
- Application Number
- CN202522112335.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-30
AI Technical Summary
Existing elastomer bushings have poor vibration damping effect under multi-directional, high-frequency vibration, and internal wear can easily produce abnormal noise.
An elastic element composed of a wavy rubber ring and an elastic layer, combined with a wear-resistant alloy contact ring and ceramic balls, transforms sliding friction into rolling friction, disperses vibration energy, and reduces wear.
It improves vibration reduction efficiency, extends service life, reduces wear and abnormal noise, and ensures stable operation of the bushing in complex environments.
Smart Images
Figure CN224679966U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elastomer bushing technology, and in particular to a vibration reduction and noise reduction structure for elastomer bushings. Background Technology
[0002] As a common auxiliary connection and protection component in mechanical systems, bushings are used to solve pain points such as wear, vibration, dimensional errors, and material compatibility in "shaft-hole fit" scenarios in engineering applications. Essentially, they optimize system performance and reduce maintenance costs through "low-cost consumable parts".
[0003] In existing technologies, some devices rely solely on a single layer of rubber elastomer for cushioning during use. When faced with multi-directional, high-frequency vibrations, their energy absorption capacity is limited, resulting in poor noise reduction. Furthermore, the inner wall of the inner sleeve is in direct contact with the external connecting shaft, and long-term sliding friction can easily lead to wear of the inner wall, which not only shortens the service life but also causes abnormal noise due to the wear gap. Utility Model Content
[0004] The purpose of this invention is to solve the problems of the single vibration reduction effect of elastomer bushings and the easy generation of abnormal noise due to internal wear in the existing technology, and to propose a vibration reduction and noise reduction structure for elastomer bushings.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a vibration reduction and noise reduction structure for an elastomer bushing, comprising a shell, an elastic element, and an internal shaft, wherein the elastic element is disposed inside the shell, the internal shaft and the elastic element are disposed inside the elastic element, a first connecting ring is fixedly connected to one end of the shell, and a second connecting ring is fixedly connected to the other end of the shell.
[0006] The elastic element includes a rubber ring fixedly connected to the outer wall of the inner shaft. An elastic layer is fixedly connected to the outer wall of the rubber ring. The elastic layer is wavy in shape and is distributed circumferentially on the outer surface of the rubber ring.
[0007] Furthermore, a contact ring is fixedly connected to the inner wall of the inner shaft, a groove is fixedly connected to the inner wall of the contact ring, and a ball is movably connected to the inner wall of the groove.
[0008] Furthermore, the first connecting ring and the second connecting ring are symmetrically distributed at both ends of the outer shell.
[0009] Furthermore, the first connecting ring includes a connecting ring fixedly connected to one end of the outer shell, and a fixing ring is fixedly connected to the end of the connecting ring away from the outer shell, and a rectangular groove is provided on the outer surface of the fixing ring.
[0010] Furthermore, the first connecting ring and the second connecting ring are fixedly connected to the connecting housing by bolts, and the rectangular grooves are distributed circumferentially on the outer surface of the fixing ring.
[0011] Furthermore, the grooves are circumferentially spaced within the contact ring, and the balls are equidistantly spaced within the grooves.
[0012] Furthermore, the contact ring is made of a wear-resistant alloy material, and the ball bearing is made of ceramic.
[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0014] 1. In this utility model, an elastic element composed of a rubber ring and a wavy elastic layer is used. The rubber ring achieves basic vibration reduction, and the wavy elastic layer can generate multi-directional deformation during radial and axial vibration, dispersing vibration energy. Compared with the existing single-layer rubber structure, the vibration reduction efficiency is improved. At the same time, the elastic layer is made of polyurethane material, which is resistant to aging and fatigue, extending the service life of the elastic element.
[0015] 2. In this utility model, the sliding friction between the internal shaft and the external connecting shaft is converted into rolling friction by the cooperation of the wear-resistant alloy contact ring and the ceramic ball. The coefficient of friction is reduced, the amount of wear is greatly reduced, and abnormal noise caused by wear is avoided. At the same time, the ceramic ball is resistant to high temperature and corrosion and can adapt to complex working environments. Attached Figure Description
[0016] Figure 1 A schematic diagram showing the disassembled structure of an elastomer bushing vibration reduction and noise reduction structure proposed in this utility model;
[0017] Figure 2 A schematic diagram of the three-dimensional structure of an elastomer bushing vibration reduction and noise reduction structure proposed in this utility model;
[0018] Figure 3 This utility model proposes a vibration reduction and noise reduction structure for an elastomer bushing, which includes a schematic diagram of the internal structure of the outer shell.
[0019] Figure 4 A cross-sectional view of the structure of the vibration reduction and noise reduction structure of the elastomer bushing proposed in this utility model;
[0020] Figure 5 This is a front view of the vibration reduction and noise reduction structure of the elastomer bushing of this utility model.
[0021] Legend:
[0022] 1. Outer shell; 2. Elastic element; 21. Rubber ring; 22. Elastic layer; 3. Internal shaft; 31. Contact ring; 32. Concave; 33. Ball bearing; 4. First connecting ring; 41. Connecting ring; 42. Fixing ring; 43. Rectangular groove; 5. Second connecting ring. Detailed Implementation
[0023] Please see Figure 1-5 This utility model provides a technical solution: a vibration reduction and noise reduction structure for an elastomer bushing, including a shell 1, an elastic element 2 and an internal shaft 3. The elastic element 2 is disposed inside the shell 1, and the internal shaft 3 and the elastic element 2 are disposed inside the elastic element 2. A first connecting ring 4 is fixedly connected to one end of the shell 1, and a second connecting ring 5 is fixedly connected to the other end of the shell 1.
[0024] The specific configuration and function of its elastic element 2 and internal shaft 3 will be discussed below.
[0025] In this embodiment: the elastic element 2 includes a rubber ring 21 fixedly connected to the outer wall of the inner shaft 3. An elastic layer 22 is fixedly connected to the outer wall of the rubber ring 21. The elastic layer 22 is wavy in shape and is distributed circumferentially on the outer surface of the rubber ring 21.
[0026] The effects achieved by the above components are as follows: the rubber ring 21 uses the high elasticity of nitrile rubber to buffer basic vibrations, and the wavy elastic layer 22 disperses vibration energy through multi-directional deformation. Compared with the existing single-layer rubber structure, it improves vibration reduction efficiency. At the same time, the aging resistance of polyurethane material extends the service life of the elastic component 2.
[0027] Specifically, a contact ring 31 is fixedly connected to the inner wall of the inner shaft 3, a groove 32 is fixedly connected to the inner wall of the contact ring 31, and a ball bearing 33 is movably connected to the inner wall of the groove 32.
[0028] The effects achieved by the above components are as follows: the contact ring 31 prevents direct wear of the internal shaft 3, and the ceramic ball 33 converts the sliding friction between the internal shaft 3 and the external connecting shaft into rolling friction, thus solving the metal impact noise caused by wear gaps and achieving the effect of noise reduction.
[0029] Specifically, the first connecting ring 4 and the second connecting ring 5 are symmetrically distributed at both ends of the outer shell 1.
[0030] The effects achieved by the above components are as follows: the symmetrically distributed connecting rings can make the forces at both ends of the outer shell 1 balanced, avoiding "shaking vibration" caused by uneven axial forces when the bushing is working; the coaxiality control can ensure the positioning accuracy of the equipment during external assembly and reduce the additional vibration transmission caused by assembly deviation.
[0031] Specifically, the first connecting ring 4 includes a connecting ring 41 fixedly connected to one end of the outer shell 1, and a fixing ring 42 fixedly connected to the end of the connecting ring 41 away from the outer shell 1. A rectangular groove 43 is provided on the outer surface of the fixing ring 42.
[0032] The effects achieved by the above components are as follows: the connecting ring 41 prevents the connecting ring from falling off; the annular step of the fixing ring 42 can fit with the step surface of the equipment mounting base to achieve axial positioning; the rectangular groove 43 can be quickly fitted with the positioning block of the installation station without repeated calibration during assembly.
[0033] Specifically, the first connecting ring 4 and the second connecting ring 5 are fixedly connected to the connecting housing 1 by bolts, and the rectangular grooves 43 are distributed in a circumferentially spaced manner on the outer surface of the fixing ring 42.
[0034] Specifically, the grooves 32 are circumferentially spaced within the contact ring 31, and the balls 33 are equidistantly spaced within the grooves 32.
[0035] The effects achieved by the above components are as follows: multiple evenly distributed bolts can make the connecting ring fit tightly with the outer shell 1, avoiding vibration and abnormal noise caused by gaps; the radial alignment design of the rectangular groove 43 and the groove 32 can ensure that the force direction of the internal ball 33 is consistent with the external assembly positioning direction, further improving the working stability of the bushing and reducing local wear caused by force offset.
[0036] Specifically, the contact ring 31 is made of wear-resistant alloy material, and the ball bearing 33 is made of ceramic.
[0037] The effects achieved by the above components are as follows: the alloy contact ring 31 has high wear resistance and can withstand long-term friction; the high-purity zirconia ceramic not only has a low coefficient of friction, but also has excellent corrosion resistance, with no risk of rust in humid or oily environments, avoiding the jamming of the ball 33 due to rust, and ensuring the long-term smooth operation of the bushing.
[0038] Working principle: When the car is driving, the vibration generated by the bumps in the road is transmitted to the outer shell 1 through the suspension arm. The outer shell 1 transmits the vibration energy to the elastic element 2. The wave-shaped elastic layer 22 of the elastic element 2 first undergoes radial compression deformation, absorbing part of the vibration. The remaining high-frequency vibration is transmitted to the rubber ring 21, which further absorbs the vibration energy. Finally, when the remaining weak vibration is transmitted to the inner shaft 3, the inner shaft 3 and the outer connecting shaft are in contact through the ceramic ball bearings 33. Rolling friction replaces sliding friction, avoiding "friction noise" caused by vibration. At the same time, the ball bearings 33 roll freely along the groove 32 without hindering the normal rotation of the connecting shaft.
[0039] The first connecting ring 4 and the second connecting ring 5 are fitted into the positioning block of the suspension mounting seat through the rectangular groove 43, ensuring that the bushing has no axial displacement. The symmetrical structure makes the forces on both ends of the outer shell 1 balanced, avoiding swaying resonance during vibration.
Claims
1. A vibration damping and noise reduction structure for an elastomer bushing, comprising a shell (1), an elastic element (2), and an internal shaft (3), characterized in that: The elastic element (2) is disposed inside the outer shell (1), the inner shaft (3) and the elastic element (2) are disposed inside the elastic element (2), one end of the outer shell (1) is fixedly connected to a first connecting ring (4), and the other end of the outer shell (1) is fixedly connected to a second connecting ring (5). The elastic element (2) includes a rubber ring (21) fixedly connected to the outer wall of the inner shaft (3). An elastic layer (22) is fixedly connected to the outer wall of the rubber ring (21). The elastic layer (22) is wavy in shape and is distributed circumferentially on the outer surface of the rubber ring (21).
2. The vibration reduction and noise reduction structure of an elastomer bushing according to claim 1, characterized in that: The inner wall of the inner shaft (3) is fixedly connected to a contact ring (31), the inner wall of the contact ring (31) is fixedly connected to a groove (32), and the inner wall of the groove (32) is movably connected to a ball (33).
3. The vibration reduction and noise reduction structure of an elastomer bushing according to claim 1, characterized in that: The first connecting ring (4) and the second connecting ring (5) are symmetrically distributed at both ends of the outer shell (1).
4. The vibration reduction and noise reduction structure of an elastomer bushing according to claim 3, characterized in that: The first connecting ring (4) includes a connecting ring (41) fixedly connected to one end of the outer shell (1). A fixing ring (42) is fixedly connected to the end of the connecting ring (41) away from the outer shell (1). A rectangular groove (43) is provided on the outer surface of the fixing ring (42).
5. The vibration reduction and noise reduction structure of an elastomer bushing according to claim 4, characterized in that: The first connecting ring (4) and the second connecting ring (5) are fixedly connected to the connecting shell (1) by bolts, and the rectangular grooves (43) are distributed in a circumferential interval on the outer surface of the fixing ring (42).
6. The vibration reduction and noise reduction structure of an elastomer bushing according to claim 2, characterized in that: The grooves (32) are circumferentially spaced within the contact ring (31), and the balls (33) are equidistantly spaced within the grooves (32).
7. The vibration reduction and noise reduction structure of an elastomer bushing according to claim 2, characterized in that: The contact ring (31) is made of wear-resistant alloy material, and the ball (33) is made of ceramic.