A bass bearing with noise reduction function

Abstract

This utility model discloses a bass bearing with noise reduction function, including a hollow corrugated shell, an outer ring fixedly installed inside the hollow corrugated shell, and an inner ring rotatably installed inside the outer ring. Both ends of the inner ring surface are fixed with cages, and several equally spaced balls are embedded inside the cages, contacting the inner wall surface of the outer ring. A rubber bushing is fixed to the inner wall of the inner ring, and a fan-shaped protrusion is integrally formed on the outer wall of the rubber bushing. The end of the fan-shaped protrusion extends outward and penetrates to the outside of the inner ring. This utility model, through the interlocking structure of the inner ring, rubber bushing, fan-shaped protrusion, and cage, allows the inner ring to roll and rub against the outer ring via the cage and balls. During this rolling friction, the rubber bushing in the inner ring continuously contacts the double-wing elastic oil overflow structure via the fan-shaped protrusion, causing grease from the polyurethane foam block to overflow.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a bass bearing with noise reduction function. Background Technology

[0002] Low-noise bearings are specifically designed to reduce operating noise. Their main function is to effectively lower the noise level of equipment during operation, which is especially important for applications requiring a quiet environment. Structurally, low-noise bearings are similar to ordinary bearings, but they are more sophisticated in material selection, machining precision, and lubrication methods. Their main structure includes an inner ring, outer ring, rolling elements, and cage, typically made of high-strength steel or ceramic materials to ensure wear resistance and strength. The rolling elements are machined with high precision, and the cage is designed more rationally to reduce noise. Lubrication systems typically use high-performance greases or oils to effectively reduce friction and noise. Some bearings also employ a sealed design to prevent lubricant leakage and the intrusion of external contaminants. For example, a low-noise bearing with noise reduction function disclosed in patent application CN219062224U includes a bearing body, a sound insulation component, and a noise reduction component. The bearing body includes an inner ring, an outer ring, and balls, with a lubrication cavity formed between the inner and outer rings, and the balls are movably disposed within the lubrication cavity. The sound insulation component includes a sound-insulating ring engaged with one side of the bearing body and sound-absorbing cotton fixedly disposed inside the outer ring. The noise reduction component includes a limiting frame fixedly disposed within the lubrication cavity, a connecting frame movably disposed on one side of the limiting frame, an oil reservoir fixedly disposed within the connecting frame, and an oil supply pipe fixedly disposed on one side of the oil reservoir. The connecting frame has mounting holes, and when the balls rotate... The lubricating oil in the reservoir flows into the oil supply pipe, and the lubricating oil in the oil supply pipe continuously flows onto the balls through the oil outlet, reducing the friction generated when the balls rotate. However, the above technical solution is mainly used in single-cage and single-stage ball bearing structures. When used in double-cage ball bearings, the amount of lubricating oil used for noise reduction is large. That is, in the double-cage bearing design, the contact surface between the rolling elements and the inner ring, outer ring, and cage increases. This means that the possibility of friction and wear also increases during operation. At this time, the amount of lubricating oil must be increased to ensure that a good oil film is formed between the contact surfaces. However, the increased amount of lubricating oil means that the lubricating oil is more likely to leak during operation. In addition, excessive lubricating oil will also lead to an excessively thick oil film, which will affect the lubrication effect, resulting in uneven lubrication and increased wear. Utility Model Content

[0003] The purpose of this invention is to provide a low-noise bearing with noise reduction function. When the inner ring rolls against the outer ring through the cage and balls, the rubber bushing in the inner ring continuously contacts the double-wing elastic oil overflow structure through the fan-shaped protrusion. The double-wing elastic oil overflow structure causes the grease in the polyurethane foam block to overflow. When the balls come into contact with the double-wing elastic oil overflow structure, the lubricating grease adheres to the balls, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a bass bearing with noise reduction function, comprising a hollow corrugated shell, an outer ring fixedly installed inside the hollow corrugated shell, and an inner ring rotatably installed inside the outer ring. Both ends of the inner ring surface are fixed with cages, and several equally spaced balls are embedded inside the cages and contact the inner wall of the outer ring. A rubber bushing is fixed to the inner wall of the inner ring, and a fan-shaped protrusion is integrally formed on the outer wall of the rubber bushing. The end of the fan-shaped protrusion extends outward and penetrates to the outside of the inner ring. A polyurethane foam block storing lubricating grease is installed inside the outer ring. Double-wing elastic oil overflow structures are installed on the left and right inner walls of the outer ring. The double-wing elastic oil overflow structures are used to release the grease in the polyurethane foam block onto the balls between the upper and lower cages when pushed by the fan-shaped protrusion.

[0005] Preferably, both ends of the hollow corrugated shell are integrally formed with flanges, and the hollow corrugated shell is made of stainless steel.

[0006] Preferably, the top end of the outer ring and the top end are integrally formed with an annular protrusion. The outer ring and the inner ring at the ends of the two retainers that are far apart from each other are equipped with sealing gaskets. The outer wall of the sealing gasket is fixedly connected to the inner wall of the outer ring, and the inner wall of the sealing gasket is in contact with the inner wall of the inner ring. The outer ring is provided with a cavity for accommodating the polyurethane foam block.

[0007] Preferably, the inner diameter of the rubber bushing is less than or equal to the inner diameter of the inner ring.

[0008] Preferably, the double-wing elastic oil spill structure includes a T-pin fixed on the inner wall of the outer ring between two retainers, a sliding sleeve slidably mounted on the surface of the T-pin, and a round head integrally formed at one end of the sliding sleeve. A spring is fitted on the other end of the surface of the T-pin, and one end of the spring abuts against the sliding sleeve. Flexible rubber pads are installed on both the front and rear outer walls of the sliding sleeve. One end of the round head extends into the interior of the polyurethane foam block and slides with the polyurethane foam block. The flexible rubber pad contacts one of the ball bearings.

[0009] Preferably, the interior of the polyurethane foam block is provided with a groove for the sliding of the flexible rubber pad, and the inner wall of one side of the outer ring is provided with a hollow part for the flexible rubber pad to pass through.

[0010] Preferably, the upper surface of the flexible rubber pad is integrally formed with ribs, and the flexible rubber pad contacts one of the balls through the ribs.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This bass bearing with noise reduction function has a structure in which an inner ring, a rubber bushing, a fan-shaped protrusion, and a cage cooperate with each other. When the inner ring rolls against the outer ring through the cage and the balls, the rubber bushing in the inner ring continuously contacts the double-wing elastic oil overflow structure through the fan-shaped protrusion. The double-wing elastic oil overflow structure causes the grease in the polyurethane foam block to overflow. When the balls come into contact with the double-wing elastic oil overflow structure, the lubricating grease adheres to the balls. The double-wing elastic oil overflow structure, through contact with the rubber bushing, can effectively overflow the lubricating grease in the polyurethane foam block, promoting the lubricating grease to flow between the balls and the inner ring. A uniform oil film is formed between the inner and outer rings and the cage, reducing direct metal-to-metal contact and thus reducing friction and wear. It also significantly reduces grease usage while maintaining lubrication, avoiding the risk of grease leakage due to excessive seepage. Secondly, the double-wing elastic oil overflow structure ensures uniform grease distribution, helping to reduce frictional noise between the balls and the inner and outer rings. This design allows the lubricant to form a more stable oil film on the friction surfaces, reducing vibration and noise. Simultaneously, the hollow corrugated shell, polyurethane foam blocks, and rubber bushings further absorb vibration and rolling noise, enhancing the overall noise reduction effect of the bearing and making the equipment quieter during operation. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0014] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0015] Figure 4 This is a three-dimensional structural diagram of the double-wing elastic oil spill structure of this utility model.

[0016] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the hollow corrugated shell of this utility model.

[0017] Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the inner ring of this utility model.

[0018] In the diagram: 1. Hollow corrugated shell; 101. Flange; 2. Outer ring; 201. Cavity; 202. Hollowed-out part; 3. Annular protrusion; 4. Polyurethane foam block; 401. Groove; 5. Inner ring; 6. Rubber bushing; 601. Fan-shaped protrusion; 7. Cage; 8. Ball bearing; 9. Double-wing elastic oil overflow structure; 901. T-pin; 902. Sliding sleeve; 903. Spring; 904. Round head; 905. Flexible rubber pad; 906. Rib; 10. Sealing gasket. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] Example 1, by Figures 1 to 5 The present invention includes a hollow corrugated shell 1, an outer ring 2 fixedly installed inside the hollow corrugated shell 1, and an inner ring 5 rotatably installed inside the outer ring 2. Both ends of the surface of the inner ring 5 are fixed with retainers 7, and a plurality of equally spaced ball bearings 8 are embedded in the retainers 7 and contact the inner wall surface of the outer ring 2. A rubber bushing 6 is fixed on the inner wall of the inner ring 5. A fan-shaped protrusion 601 is integrally formed on the outer wall of the rubber bushing 6. The end of the fan-shaped protrusion 601 extends outward and penetrates to the outside of the inner ring 5. The inner diameter of the rubber bushing 6 is less than or equal to the inner diameter of the inner ring 5. The rubber bushing 6 provides elasticity and cushioning and reduces noise when in contact with the double-wing elastic oil spill structure 9.

[0021] The outer ring 2 has a polyurethane foam block 4 containing lubricating grease installed inside. The left and right inner walls of the outer ring 2 are equipped with double-wing elastic oil overflow structures 9. The double-wing elastic oil overflow structures 9 are used to release the grease in the polyurethane foam block 4 to the ball bearings 8 between the upper and lower retainers 7 when pushed by the fan-shaped protrusion 601.

[0022] The polyurethane foam block 4, rubber bushing 6, and hollow corrugated shell 1 have the function of noise reduction and sound absorption, further reducing the vibration and noise of the bearing. Both ends of the surface of the hollow corrugated shell 1 are integrally formed with flanges 101. The hollow corrugated shell 1 is made of stainless steel. The hollow corrugated shell 1 is bolted to the external mounting surface through the flanges 101 so that the bearing can bear the load from the shaft in a stable state.

[0023] The top of the outer ring 2 and the top end are integrally formed with an annular protrusion 3. The outer ring 2 and the inner ring 5 are equipped with sealing gaskets 10 at the ends of the two retainers 7 that are far apart from each other. The outer wall of the sealing gasket 10 is fixedly connected to the inner wall of the outer ring 2, and the inner wall of the sealing gasket 10 is in contact with the inner wall of the inner ring 5. The outer ring 2 is provided with a cavity 201 for accommodating the polyurethane foam block 4. The polyurethane foam block 4 is installed in the cavity 201 of the outer ring 2, and the cavity 201 provides a accommodating chamber for the polyurethane foam block 4.

[0024] When the fan-shaped protrusion 601 interacts with the double-wing elastic oil overflow structure 9, the double-wing elastic oil overflow structure 9 causes the lubricating grease in the polyurethane foam block 4 to overflow, forming an oil film covering the ball 8 and the friction surface. During this process, the sealing gaskets 10 at both ends between the outer ring 2 and the inner ring 5 serve to seal the grease and reduce grease seepage.

[0025] Example 2, based on Example 1, is... Figure 4 , Figure 5 and Figure 6 The double-wing elastic oil spill structure 9 includes a T-pin 901 fixed on the inner wall of the outer ring 2 between two retainers 7, a sliding sleeve 902 slidably mounted on the surface of the T-pin 901, and a round head 904 integrally formed at one end of the sliding sleeve 902. A spring 903 is fitted on the other end of the surface of the T-pin 901. One end of the spring 903 abuts against the sliding sleeve 902. Flexible rubber pads 905 are installed on both the front and rear outer walls of the sliding sleeve 902. One end of the round head 904 extends into the interior of the polyurethane foam block 4 and slides in cooperation with the polyurethane foam block 4. The flexible rubber pad 905 contacts one of the ball bearings 8. The interior of the polyurethane foam block 4 is provided with a groove 401 for the flexible rubber pad 905 to slide. A hollow part 202 is provided on one side of the inner wall of the outer ring 2 for the flexible rubber pad 905 to pass through.

[0026] The upper surface of the flexible rubber pad 905 is integrally formed with a rib 906. The flexible rubber pad 905 contacts one of the ball bearings 8 through the rib 906. When the fan-shaped protrusion 601 contacts the double-wing elastic oil overflow structure 9, the fan-shaped protrusion 601 contacts the round head 904 at one end of the sliding sleeve 902, causing the sliding sleeve 902 and the round head 904 to move towards the groove 401. At this time, the spring 903 is in a compressed state, and the sliding sleeve 902 drives the flexible rubber pad 905. 05 Slides in the groove 401 of the polyurethane foam block 4. At this time, the grease in the polyurethane foam block 4 continuously seeps into the flexible rubber pad 905 and the rib 906. When the fan-shaped protrusion 601 separates from the round head 904, the spring 903 causes the sliding sleeve 902, the flexible rubber pad 905, and the rib 906 to elastically return to their original positions. The grease is then applied to the ball 8 through the rib 906, forming an oil film that covers the ball 8 and the friction surface, ensuring that the lubricating grease is evenly distributed on the friction surface.

[0027] In this embodiment, the inner ring 5 is first connected to the outer shaft via a keyway. The outer ring 2 and inner ring 5 are the core components of the bearing system, bearing the load from the cage 7 and the balls 8. When the outer shaft drives the inner ring 5, rubber bushing 6, and cage 7 to rotate, the balls 8 roll stably between the outer ring 2 and inner ring 5 through the cage 7. The cage 7 maintains a uniform spacing between adjacent balls 8 and prevents collisions between the balls 8. The fan-shaped protrusion 601 of the rubber bushing 6 continuously contacts the movable end of the double-wing elastic oil overflow structure 9. At this time, the double-wing elastic oil overflow structure... 9. The lubricating grease overflows from the polyurethane foam block 4, forming an oil film that covers the friction surface of the balls 8, thereby ensuring that the lubricating grease is evenly distributed on each ball 8, optimizing the lubrication effect and reducing friction and wear. The polyurethane foam block 4, as an oil reservoir, can store the lubricating grease and release it when the double-wing elastic oil overflow structure 9 is activated. That is, the lubricating grease in the polyurethane foam block 4 is squeezed out and enters the friction area where the cage 7 and balls 8 are located through the double-wing elastic oil overflow structure 9, so that the grease can quickly penetrate and cover the friction surface, ensuring the lubrication effect.

Claims

1. A bass bearing having a noise reduction function, characterized by: The device includes a hollow corrugated shell (1), an outer ring (2) fixedly installed inside the hollow corrugated shell (1), and an inner ring (5) rotatably installed inside the outer ring (2). Both ends of the inner ring (5) are fixed with retainers (7), and several equally spaced ball bearings (8) are embedded inside the retainers (7) and contact the inner wall of the outer ring (2). A rubber bushing (6) is fixed to the inner wall of the inner ring (5), and a fan-shaped protrusion (60) is integrally formed on the outer wall of the rubber bushing (6). 1) The end of the fan-shaped protrusion (601) extends outward and penetrates to the outside of the inner ring (5). The outer ring (2) is equipped with a polyurethane foam block (4) storing lubricating grease. The left and right inner walls of the outer ring (2) are equipped with double-wing elastic oil overflow structures (9). The double-wing elastic oil overflow structures (9) are used to release the grease in the polyurethane foam block (4) to the ball (8) between the upper and lower retainers (7) when it is pushed by the fan-shaped protrusion (601).

2. The bass bearing with noise reduction function according to claim 1, characterized in that: The hollow corrugated shell (1) has flanges (101) integrally formed at both ends of its surface. The hollow corrugated shell (1) is made of stainless steel.

3. The bass bearing with noise reduction function according to claim 1, characterized in that: The top end of the outer ring (2) and the top end are integrally formed with an annular protrusion (3). The outer ring (2) and the inner ring (5) of the two retainers (7) are respectively far apart and are equipped with sealing gaskets (10). The outer wall of the sealing gasket (10) is fixedly connected to the inner wall of the outer ring (2). The inner wall of the sealing gasket (10) is in contact with the inner wall of the inner ring (5). The outer ring (2) is provided with a cavity (201) for accommodating the polyurethane foam block (4).

4. The bass bearing with noise reduction function according to claim 1, characterized in that: The inner diameter of the rubber bushing (6) is less than or equal to the inner diameter of the inner ring (5).

5. The bass bearing with noise reduction function according to claim 1, characterized in that: The double-wing elastic oil spill structure (9) includes a T-pin (901) fixed on the inner wall of the outer ring (2) between two retainers (7), a sliding sleeve (902) slidably mounted on the surface of the T-pin (901), and a round head (904) integrally formed at one end of the sliding sleeve (902). A spring (903) is fitted on the other end of the surface of the T-pin (901). One end of the spring (903) abuts against the sliding sleeve (902). Flexible rubber pads (905) are installed on the front and rear outer walls of the sliding sleeve (902). One end of the round head (904) extends into the interior of the polyurethane foam block (4) and slides with the polyurethane foam block (4). The flexible rubber pad (905) contacts one of the ball bearings (8).

6. A bass bearing with noise reduction function according to claim 5, characterized in that: The interior of the polyurethane foam block (4) is provided with a groove (401) for sliding of the flexible rubber pad (905), and the inner wall of one side of the outer ring (2) is provided with a hollow part (202) for the flexible rubber pad (905) to pass through.

7. A bass bearing with noise reduction function according to claim 6, characterized in that: The upper surface of the flexible rubber pad (905) is integrally formed with a rib (906), and the flexible rubber pad (905) contacts one of the balls (8) through the rib (906).

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