Silent type rolling bearing

Abstract

The utility model discloses a mute type rolling bearing, including inner race, outer ring, retainer and rolling body, the inner race and outer ring between forming have the rolling cavity for the activity of rolling body, the inner race and outer ring between being provided with two for the inner sound insulation ring of the most noise reflection and isolation when bearing operation and producing noise, two the inner sound insulation ring is divided and is located at the both sides position of rolling cavity, the outer ring is set up with the outer sound insulation ring, the outer sound insulation ring is integrative bending with sound insulation part towards the both sides position of rolling cavity, sound insulation part and inner sound insulation ring clearance cooperation and are formed with the sound absorption chamber, be provided with the sound absorption piece for absorbing and intercepting noise in the sound absorption chamber. The utility model solves the problem of poor noise reduction effect, high cost and limited bearing capacity in prior art mute bearing.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a silent rolling bearing. Background Technology

[0002] As a core component of household appliances and small transmission equipment, the noise generated by rolling bearings during operation directly affects the user experience and product quality. Currently, most silent bearings on the market rely on high-precision machining, high-end materials, or complex noise reduction structures. This not only results in high manufacturing costs but also often sacrifices structural strength for noise reduction design, leading to limited load-bearing capacity. Furthermore, existing structures have limited effectiveness in reflecting, isolating, and absorbing noise, making it difficult to meet the ever-increasing demand for quiet operation, and they are prone to noise leakage under normal operating conditions. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a silent rolling bearing, which solves the problems of poor noise reduction effect, high cost and limited load-bearing capacity of existing silent bearings.

[0004] To achieve the above objectives, this utility model provides a silent rolling bearing, including an inner ring, an outer ring, a cage, and rolling elements. A rolling cavity is formed between the inner and outer rings for the rolling elements to move in. Two inner sound-insulating rings are provided between the inner and outer rings to reflect and isolate most of the noise when the bearing is running and generating noise. The two inner sound-insulating rings are located on both sides of the rolling cavity. An outer sound-insulating ring is fitted on the outer ring. The outer sound-insulating ring has an integrally bent sound-insulating part on both sides of the rolling cavity. The sound-insulating part is clearance-fitted with the inner sound-insulating ring to form a sound-absorbing chamber. The sound-absorbing chamber is provided with a sound-absorbing element for absorbing and intercepting noise.

[0005] The advantages of adopting the above technical solution are as follows: The inner sound-insulating ring reflects and isolates most of the noise generated by the bearing operation, thereby reducing the direct outward transmission of noise. Furthermore, the two inner sound-insulating rings are positioned on both sides of the rolling cavity, forming a bidirectional sound barrier from both ends of the rolling cavity, thus comprehensively blocking the noise generated by the rolling motion. The outer sound-insulating ring is fitted onto the outer ring and integrally bent into a sound-insulating part, simplifying the overall structure and improving its integrity and stability. Simultaneously, the sound-insulating part and the inner sound-insulating ring form a sound-absorbing chamber with a gap fit, providing a stable installation space for the sound-absorbing components. The sound-absorbing components absorb and intercept residual noise that penetrates the inner sound-insulating ring, thus achieving multiple noise attenuation. The overall structure requires no complex precision machining and possesses excellent noise reduction performance and stable load-bearing capacity, making it suitable for the needs of household appliances and other equipment.

[0006] The present invention further includes: the inner sound insulation ring having a plurality of sound transmission holes evenly distributed circumferentially to transmit part of the noise generated during bearing operation to the sound absorption chamber.

[0007] The advantages of adopting the above technical solution are: the inner sound insulation ring has several sound transmission holes evenly distributed around it, which can directionally transmit some of the noise generated by the bearing operation to the sound absorption chamber, avoiding the noise from repeatedly reflecting and resonating between the rolling cavity and the inner sound insulation ring. Moreover, the uniform circumferential arrangement of the sound transmission holes ensures the uniformity of noise transmission to the sound absorption chamber, thereby improving the noise absorption efficiency of the sound absorption component.

[0008] The present invention further comprises: a groove is provided circumferentially on the inner wall of the sound insulation part, the groove is connected to the sound absorption chamber, the sound absorption component includes sound-absorbing cotton disposed in the sound absorption chamber, the outer wall of the sound-absorbing cotton is fitted with the inner wall of the sound insulation part, and the inner wall of the sound-absorbing cotton is fitted with the outer wall of the inner sound insulation ring.

[0009] The advantages of adopting the above technical solution are: the inner wall of the sound insulation part is provided with a groove in the circumference, and the groove is connected to the sound absorption chamber, thereby limiting and fixing the sound absorption component, preventing the sound absorption component from shifting or falling off when the bearing is running, and ensuring the long-term stable operation of the sound absorption structure; the sound absorption component is made of sound-absorbing cotton, which has excellent sound absorption and noise reduction performance and can efficiently absorb noise in the sound absorption chamber. At the same time, the outer wall of the sound-absorbing cotton is attached to the inner wall of the sound insulation part, and its inner wall is attached to the outer wall of the inner sound insulation ring, thereby eliminating the gap between the sound-absorbing cotton and adjacent components, preventing noise from leaking out from the gap, and thus improving the overall sealing and sound insulation effect.

[0010] The present invention further comprises: two connecting grooves are provided circumferentially on the outer peripheral wall of the outer ring, and the two connecting grooves are respectively located at both ends of the outer peripheral wall of the outer ring; a connecting protrusion is provided on the inner peripheral wall of the outer sound insulation ring corresponding to the two connecting grooves, and the two connecting protrusions are engaged with the connecting grooves.

[0011] The advantages of adopting the above technical solution are as follows: In the above technology, the outer ring has two connecting grooves circumferentially opened, and the two connecting grooves are respectively located at both ends of the outer ring's outer circumferential wall. The inner circumferential wall of the outer sound insulation ring is provided with connecting protrusions corresponding to the two connecting grooves. By engaging the connecting protrusions with the connecting grooves, the outer sound insulation ring and the outer ring can be quickly and accurately assembled, thereby improving assembly efficiency and reducing labor costs. The two connecting grooves and the connecting protrusions are symmetrically arranged to ensure the firmness and coaxiality of the connection between the outer sound insulation ring and the outer ring, preventing the outer sound insulation ring from loosening or shifting, thereby avoiding the impact of component misalignment on sound insulation performance.

[0012] The present invention further includes the following: the inner circumferential wall of the outer ring and the outer circumferential wall of the inner ring are provided with mating grooves corresponding to the positions of the two inner sound insulation rings; the outer circumferential wall of the inner sound insulation ring and the inner circumferential wall of the shaft hole of the inner sound insulation ring are integrally bent with arc-shaped protrusions in the direction of the rolling element; each arc-shaped protrusion is interference-fitted with its adjacent mating groove.

[0013] The advantages of adopting the above technical solution are as follows: In this technology, mating grooves are provided on the inner circumferential wall of the outer ring and the outer circumferential wall of the inner ring at the positions of the two inner sound insulation rings, thereby providing precise installation positioning for the inner sound insulation rings and ensuring the relative positional accuracy between the inner sound insulation rings and the rolling cavity; the outer circumferential wall of the inner sound insulation ring and the inner circumferential wall of the shaft hole are integrally bent into an arc-shaped protrusion towards the rolling element, and the arc-shaped protrusion is interference-fitted with the mating groove, thereby achieving stable fixation of the inner sound insulation ring with the inner and outer rings, thus preventing the inner sound insulation ring from moving during bearing operation; at the same time, the aforementioned arc-shaped protrusion structure can disperse the stress on the inner sound insulation ring, improve the structural strength and deformation resistance of the inner sound insulation ring, reduce the assembly gap between components, further block the noise transmission path, and ensure the stable load-bearing performance of the bearing.

[0014] The present invention further comprises: sealing rings provided on both sides of the rolling cavity; a first groove is provided on the inner peripheral wall of the outer ring; the outer peripheral wall of the sealing ring is fitted with the first groove; a second groove is provided on the outer peripheral wall of the inner ring; the inner peripheral wall of the shaft hole of the sealing ring is fitted with the second groove; and the two sealing rings are combined to form a seal for the rolling cavity.

[0015] The advantages of adopting the above technical solution are: sealing rings are provided on both sides of the rolling cavity, and a first groove is opened on the inner peripheral wall of the outer ring and a second groove is opened on the outer peripheral wall of the inner ring. The two sealing rings are respectively tightened with the first groove and interference-fitted with the second groove, thereby achieving a tight connection between the sealing rings and the inner and outer rings. The combination of the two sealing rings forms a sealing barrier for the rolling cavity, effectively preventing external dust and impurities from entering the rolling cavity, thereby avoiding impurities from affecting the operation of the rolling elements and reducing wear and abnormal noise. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the present invention; Figure 2 This is a cross-sectional view of the present invention. Detailed Implementation

[0017] This utility model provides a silent rolling bearing, including an inner ring 1, an outer ring 2, a cage 11, and rolling elements 12. A rolling cavity 13 is formed between the inner ring 1 and the outer ring 2 for the rolling elements 12 to move. Two inner sound-insulating rings 3 are provided between the inner ring 1 and the outer ring 2 to reflect and isolate most of the noise when the bearing is running and generating noise. The two inner sound-insulating rings 3 are respectively located on both sides of the rolling cavity 13. An outer sound-insulating ring 4 is fitted on the outer ring 2. The outer sound-insulating ring 4 has a sound-insulating part 41 integrally bent towards both sides of the rolling cavity 13. The sound insulation part 41 is fitted with the inner sound insulation ring 3 to form a sound absorption chamber 42. The sound absorption chamber 42 is equipped with sound-absorbing components for absorbing and intercepting noise. The inner sound insulation ring 3 has a plurality of circumferentially distributed sound transmission holes 31 for transmitting some of the noise generated during bearing operation to the sound absorption chamber 42. The inner wall of the sound insulation part 41 has a circumferentially formed groove 411 that communicates with the sound absorption chamber 42. The sound-absorbing components include sound-absorbing cotton 43 disposed in the sound absorption chamber 42, with the outer wall of the sound-absorbing cotton 43 adhering to the inner wall of the sound insulation part 41. The inner wall of the sound-absorbing cotton 43 is fitted to the outer wall of the inner sound insulation ring 3. Two connecting grooves 21 are circumferentially formed on the outer peripheral wall of the outer ring 2, located at opposite ends of the outer peripheral wall. Connecting protrusions 44 are provided on the inner peripheral wall of the outer sound insulation ring 4 corresponding to the two connecting grooves 21, and these protrusions 44 engage with the connecting grooves 21. Matching grooves 22 are formed on the inner peripheral wall of the outer ring 2 and the outer peripheral wall of the inner ring 1 corresponding to the two inner sound insulation rings 3. The outer peripheral wall of the inner sound insulation ring 3 and the shaft hole of the inner sound insulation ring 3 are also fitted with these grooves. The peripheral wall is integrally bent towards the rolling element 12 with an arc-shaped protrusion 32. Each arc-shaped protrusion 32 is interference-fitted with its adjacent mating groove 22. A sealing ring 14 is provided on both sides of the rolling cavity 13. A first groove 23 is provided on the inner peripheral wall of the outer ring 2. The outer peripheral wall of the sealing ring 14 is tightly fitted with the first groove 23. A second groove 15 is provided on the outer peripheral wall of the inner ring 1. The inner peripheral wall of the shaft hole of the sealing ring 14 is interference-fitted with the second groove 15. The two sealing rings 14 are combined to form a seal for the rolling cavity 13.

[0018] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A silent rolling bearing, comprising an inner ring, an outer ring, a cage, and rolling elements, wherein a rolling cavity for the rolling elements to move is formed between the inner ring and the outer ring, characterized in that: Two inner sound-insulating rings are provided between the inner and outer rings to reflect and isolate most of the noise when the bearing is running and generating noise. The two inner sound-insulating rings are respectively located on both sides of the rolling cavity. An outer sound-insulating ring is fitted on the outer ring. The outer sound-insulating ring has a sound-insulating part integrally bent on both sides of the rolling cavity. The sound-insulating part is fitted with the inner sound-insulating ring with a gap to form a sound-absorbing chamber. The sound-absorbing chamber is provided with a sound-absorbing component for absorbing and intercepting noise.

2. A silent rolling bearing according to claim 1, characterized in that: The inner sound insulation ring has several sound transmission holes evenly distributed around it to transmit some of the noise generated during bearing operation to the sound absorption chamber.

3. A silent rolling bearing according to claim 1, characterized in that: The inner wall of the sound insulation part is provided with a circumferential groove, which is connected to the sound absorption chamber. The sound absorption component includes sound-absorbing cotton disposed in the sound absorption chamber. The outer wall of the sound-absorbing cotton is fitted with the inner wall of the sound insulation part, and the inner wall of the sound-absorbing cotton is fitted with the outer wall of the inner sound insulation ring.

4. A silent rolling bearing according to claim 1, characterized in that: Two connecting grooves are circumferentially formed on the outer peripheral wall of the outer ring, and the two connecting grooves are respectively set at both ends of the outer peripheral wall of the outer ring. A connecting protrusion is provided on the inner peripheral wall of the outer sound insulation ring at the position of the two connecting grooves, and the two connecting protrusions are engaged with the connecting grooves.

5. A silent rolling bearing according to claim 1, characterized in that: The inner peripheral wall of the outer ring and the outer peripheral wall of the inner ring are provided with mating grooves corresponding to the two inner sound insulation ring positions. The outer peripheral wall of the inner sound insulation ring and the inner peripheral wall of the shaft hole of the inner sound insulation ring are integrally bent with arc-shaped protrusions in the direction of the rolling element. Each arc-shaped protrusion is interference-fitted with its adjacent mating groove.

6. A silent rolling bearing according to claim 1, characterized in that: Both sides of the rolling cavity are provided with sealing rings. A first groove is formed on the inner peripheral wall of the outer ring. The outer peripheral wall of the sealing ring is tightly fitted with the first groove. A second groove is formed on the outer peripheral wall of the inner ring. The inner peripheral wall of the shaft hole of the sealing ring is interference fitted with the second groove. The two sealing rings are combined to form a seal for the rolling cavity.

Images