Low-noise bearing

Abstract

The utility model provides a low-noise bearing, which relates to the technical field of bearings and comprises a bearing outer ring and a bearing inner ring, annular outer connecting plates are arranged on the two sides of the bearing outer ring, annular sound-absorbing boxes are fixedly connected to the inner side edges of the annular outer connecting plates, and the two annular sound-absorbing boxes are respectively arranged on the two sides of the bearing outer ring and the bearing inner ring. A plurality of first sound absorption holes are evenly formed in the surfaces of the annular sound absorption boxes, the annular sound absorption boxes are arranged on the two sides of the outer ring and the inner ring of the bearing and matched with the first sound absorption holes and the first sound absorption layer, noise running out from the side face when the bearing operates can be absorbed, and meanwhile the second sound absorption holes, the second sound absorption layer and the second reflection layer in the interlayer of the inner ring and the outer ring of the bearing can effectively absorb noise. And noise generated by the operation of the balls can be reduced, and the noise reduction effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field especially relates to a low noise bearing. BACKGROUND

[0002] Bearing is an important mechanical element, its main function is to support mechanical rotating body, reduce friction in the movement, and ensure the rotation precision, the classification of bearing can be classified according to its use, structure, friction mode and so on various ways, and the use of bearing is very extensive, and it is applied in each field such as automobile, motor, aerospace to precision machine tool.

[0003] The low noise bearing of prior art, the publication number is: CN221857305U, when bearing is used, first, add lubricating oil to the inside of bearing, then insert the sealing cover between the bearing outer ring and the bearing inner ring, the sealing cover bottom will extrude the clamping block, so that the clamping block starts to extrude the spring and the damper and shrinks to the inside of the first recess, when the sealing cover is completely inserted between the bearing outer ring and the bearing inner ring, the spring and the damper will drive the clamping block to enter the second recess, the sealing cover position is fixed, then the muffler is attached to the surface of bearing outer ring, the screw is screwed into the inside of threaded hole, and the muffler is fixed through the threaded block, when bearing works, noise will be generated, noise will first enter the sound absorption layer, then the sound absorption layer will absorb most of the noise, the reflection layer will reflect the remaining noise to the sound absorption layer for further absorption, to reduce noise as much as possible, the waterproof layer can avoid water entering the sound absorption layer, resulting in the sound absorption layer losing effect, and the protection layer can reduce the probability of damage of the muffler due to external collision.

[0004] In the low noise bearing, the main function of the sealing cover is to prevent foreign matter from entering and facilitate lubrication maintenance, and the muffler is covered in the specific area of bearing outer ring through the sound absorption layer, reflection layer and other components, but if the side is not completely covered by the muffler, and the sealing cover is only a mechanical sealing structure, noise may leak from the side of bearing, resulting in reduced noise reduction effect. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problems in the prior art and provides a low noise bearing.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a low noise bearing, including bearing outer ring and bearing inner race, the both sides of bearing outer ring are provided with annular outer connecting plate, the inboard fixed connection of annular outer connecting plate has annular sound absorption box, two annular sound absorption boxes are arranged respectively at the both sides of bearing outer ring and bearing inner race, the surface of annular sound absorption box is evenly provided with a plurality of first sound absorption holes, the inside of annular sound absorption box is filled with first sound absorption layer, the both sides of bearing outer ring are provided with annular inner connecting plate, the outboard fixed connection of annular inner connecting plate has the protection shell for protecting annular sound absorption box, the inner surface of protection shell is covered with first reflection layer.

[0007] Preferably, the bearing outer ring and the bearing inner race are provided with a sandwich inside, and the bearing outer ring inboard and the bearing inner race outboard are provided with second sound absorption holes between the sandwich with similar positions.

[0008] Preferably, the second sound absorption holes are provided with a plurality of annular array distribution around the bearing center axis, and the plurality of second sound absorption holes are divided into two rows, and the two rows of second sound absorption holes are arranged on the both sides of the ball.

[0009] Preferably, the sandwich is provided with a second sound absorption layer, and the second sound absorption layer is provided with a second reflection layer outside.

[0010] Preferably, the bearing outer ring and the bearing inner race are provided with mounting grooves, and the annular inner connecting plate and the annular outer connecting plate are arranged in the mounting grooves.

[0011] Preferably, a plurality of mounting holes are arranged on the annular inner connecting plate and the annular outer connecting plate in annular array distribution, and the mounting holes are provided with fixed bolts for thread connection with the bearing outer ring and the bearing inner race.

[0012] Preferably, the cross section of the protection shell is U-shaped, the U-shaped opening of the protection shell faces the annular sound absorption box, the annular sound absorption box is arranged inside the protection shell, and the annular sound absorption box is in clearance fit with the protection shell.

[0013] Preferably, the annular sound absorption box is in clearance fit with the bearing inner race.

[0014] Compared with the prior art, the utility model has the advantages and positive effects that,

[0015] 1、in the utility model, by setting annular sound absorption box on the both sides of bearing outer ring and inner race, cooperating with first sound absorption hole, first sound absorption layer, can absorb the noise running out from side when bearing runs, at the same time, the second sound absorption hole in the sandwich of bearing inner and outer ring, second sound absorption layer and second reflection layer can reduce the noise generated by the ball running, improve the noise reduction effect.

[0016] 2. The utility model discloses a mounting groove, the mounting hole and fixed bolt on annular inner connecting plate, annular outer connecting plate are collocated, and each component is closely and stably connected together, so that the whole bearing structure is more compact, and the U-shaped structure design of the protective shell can protect the annular sound box from being damaged by external collision. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional structure schematic diagram of a low-noise bearing is provided for the utility model;

[0018] Figure 2 A side sectional three-dimensional structure schematic diagram is provided for the utility model Figure 1 .

[0019] Figure 3 A three-dimensional structure schematic diagram of a first sound hole is provided for the utility model;

[0020] Figure 4 A three-dimensional structure schematic diagram of a protective shell is provided for the utility model;

[0021] Figure 5 An enlarged view of A in Figure 2 .

[0022] Legend: 1, bearing outer ring; 2, bearing inner ring; 3, fixed bolt; 4, protective shell; 5, annular sound box; 6, first sound hole; 7, annular inner connecting plate; 8, mounting hole; 9, second reflection layer; 10, second sound absorption layer; 11, second sound hole; 12, first reflection layer; 13, first sound absorption layer; 14, annular outer connecting plate; 15, mounting groove; 16, interlayer. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further described below in combination with the drawings and examples. It should be noted that the embodiments of the application and the features in the examples can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from the description, therefore, the utility model is not limited to the specific embodiments disclosed in the following disclosure.

[0025] As Figures 1-5As shown, a low-noise bearing includes an outer bearing ring 1 and an inner bearing ring 2. Annular outer connecting plates 14 are provided on both sides of the outer bearing ring 1. Annular sound-absorbing boxes 5 are fixedly connected to the inner sides of the annular outer connecting plates 14. Two annular sound-absorbing boxes 5 are respectively located on both sides of the outer bearing ring 1 and the inner bearing ring 2. A plurality of first sound-absorbing holes 6 are evenly distributed on the surface of the annular sound-absorbing boxes 5. A first sound-absorbing layer 13 is filled inside the annular sound-absorbing boxes 5. Annular inner connecting plates 7 are provided on both sides of the outer bearing ring 1. A protective shell 4 for protecting the annular sound-absorbing boxes 5 is fixedly connected to the outer sides of the annular inner connecting plates 7. The inner surface of the protective shell 4 is covered with a first reflective layer 12.

[0026] In this technical solution, the annular outer connecting plate 14 is fixedly connected to the annular sound-absorbing box 5, so that the annular sound-absorbing box 5 can be stably set on both sides of the bearing outer ring 1 and the bearing inner ring 2. The first sound-absorbing hole 6 on the surface of the annular sound-absorbing box 5 allows noise to enter the interior of the annular sound-absorbing box 5, and the first sound-absorbing layer 13 filled inside can absorb noise, playing a preliminary noise reduction role.

[0027] The protective shell 4 protects the annular sound-absorbing box 5 from damage caused by external impacts. The first reflective layer 12 on the inner surface of the protective shell 4 reflects noise that is not completely absorbed by the first sound-absorbing layer 13 back to the first sound-absorbing layer 13, further improving the sound absorption effect and reducing the outward transmission of noise. The annular inner connecting plate 7 is fixedly connected to the protective shell 4, ensuring the installation stability of the protective shell 4 and thus ensuring that the entire noise reduction structure can function effectively.

[0028] like Figure 5 As shown, both the outer ring 1 and the inner ring 2 of the bearing have a sandwich layer 16 inside. The inner side of the outer ring 1 and the outer side of the inner ring 2 are provided with second sound-absorbing holes 11 between the sandwich layers 16 in close positions. There are a number of second sound-absorbing holes 11 and they are arranged in a ring array around the central axis of the bearing. The number of second sound-absorbing holes 11 are divided into two rows. The two rows of second sound-absorbing holes 11 are arranged on both sides of the ball. A second sound-absorbing layer 10 is provided in the sandwich layer 16. A second reflective layer 9 is sleeved on the outside of the second sound-absorbing layer 10.

[0029] In the technical solution, the interlayer 16 inside the bearing outer ring 1 and the bearing inner ring 2 provides a mounting space for the noise reduction assembly, the two rows of second sound-absorbing holes 11 arranged in a ring array around the bearing center axis and located on both sides of the ball can effectively capture the noise generated by the ball during operation and guide the noise into the interlayer 16, the second sound-absorbing layer 10 in the interlayer 16 converts the incoming sound energy into other forms of energy to achieve noise absorption and reduce the intensity of the noise, and the second reflecting layer 9 sleeved outside the second sound-absorbing layer 10 mainly reflects the noise that is not completely absorbed by the second sound-absorbing layer 10 back to the second sound-absorbing layer 10 to increase the absorption opportunity and further reduce the noise transmitted through the bearing outer ring 1 and the bearing inner ring 2, thereby achieving a more efficient noise reduction effect and comprehensively improving the low-noise performance of the bearing.

[0030] Further, the first sound-absorbing layer 13 and the second sound-absorbing layer 10 can be made of sound-absorbing rubber, and the first reflecting layer 12 and the second reflecting layer 9 can be made of polyester film coated with aluminum.

[0031] As shown in Figure 5 The bearing outer ring 1 and the bearing inner ring 2 are provided with mounting grooves 15 on both sides, and the ring-shaped inner connecting plate 7 and the ring-shaped outer connecting plate 14 are arranged in the mounting grooves 15, a plurality of mounting holes 8 arranged in a ring array are formed in the ring-shaped inner connecting plate 7 and the ring-shaped outer connecting plate 14, and a fixing bolt 3 for threaded connection with the bearing outer ring 1 and the bearing inner ring 2 is arranged in the mounting hole 8.

[0032] In the technical solution, the mounting grooves 15 on both sides of the bearing outer ring 1 and the bearing inner ring 2 provide precise positioning and mounting space for the ring-shaped inner connecting plate 7 and the ring-shaped outer connecting plate 14, so that they can be accurately installed at a specific position of the bearing to ensure the compactness and orderliness of the entire structure, and the mounting holes 8 arranged in a ring array on the ring-shaped inner connecting plate 7 and the ring-shaped outer connecting plate 14 cooperate with the fixing bolt 3 to firmly fix the ring-shaped inner connecting plate 7 and the ring-shaped outer connecting plate 14 on the bearing outer ring 1 and the bearing inner ring 2 by threaded connection, and the ring array distribution mode uniformly disperses the fixing force between the connecting plate and the bearing, avoiding local excessive stress and enhancing the stability of the connection.

[0033] In addition, the threaded connection of the fixing bolt 3 not only facilitates installation and disassembly, but also effectively prevents the connecting plate from loosening during long-term operation of the bearing, ensuring that the noise reduction components such as the ring-shaped sound-absorbing box 5 and the protective shell 4 are always in the correct position and continuously play a noise reduction role, thereby guaranteeing the stability of the low-noise bearing.

[0034] As shown in Figure 4As shown, the cross section of the protective shell 4 is U-shaped, the U-shaped opening of the protective shell 4 faces the annular sound absorption box 5, the annular sound absorption box 5 is arranged inside the protective shell 4, the annular sound absorption box 5 is in clearance fit with the protective shell 4, and the annular sound absorption box 5 is in clearance fit with the bearing inner ring 2.

[0035] In the technical solution, the protective shell 4 is arranged to provide good protection for the annular sound absorption box 5, effectively prevent foreign matters from impacting the annular sound absorption box 5, and reduce the risk of damage, and the U-shaped structure can also reflect and block noise to some extent, reducing the spread of noise.

[0036] In addition, the annular sound absorption box 5 is in clearance fit with the protective shell 4, so that the annular sound absorption box 5 has a certain space for movement in the protective shell 4, and the annular sound absorption box 5 is in clearance fit with the bearing inner ring 2, so that the bearing inner ring 2 does not directly rub against the annular sound absorption box 5 during operation.

[0037] Working principle: when the low-noise bearing works, the noise generated by the operation of the bearing first enters the inside through the first sound absorption hole 6 on the surface of the annular sound absorption box 5, is absorbed by the first sound absorption layer 13 to achieve primary noise reduction, and the first reflection layer 12 on the inner surface of the protective shell 4 reflects the noise that is not completely absorbed back to the first sound absorption layer 13 for secondary absorption; at the same time, the noise generated by the operation of the ball is captured by the second sound absorption hole 11 arranged in a ring array on both sides of the ball and introduced into the interlayer 16, the second sound absorption layer 10 in the interlayer 16 performs secondary absorption, the second reflection layer 9 reflects the remaining noise back to the second sound absorption layer 10 for further absorption, in addition, the U-shaped protective shell 4 blocks foreign matters and reflects noise, the clearance fit between the annular sound absorption box 5 and the protective shell 4 and the bearing inner ring 2 avoids additional friction noise, and multiple structures work together to achieve efficient noise reduction.

[0038] The above is only a preferred embodiment of the present application, and does not limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments still falls within the protection scope of the present application.

Claims

1. A low noise bearing comprising a bearing outer ring (1) and a bearing inner ring (2), characterized in that: The annular outer connecting plate (14) is fixedly connected with the annular sound absorption box (5) on the inner side, two annular sound absorption boxes (5) are arranged on the two sides of the bearing outer ring (1) and the bearing inner ring (2) respectively, a plurality of first sound absorption holes (6) are uniformly arranged on the surface of the annular sound absorption box (5), the annular sound absorption box (5) is filled with a first sound absorption layer (13), the annular inner connecting plate (7) is arranged on the two sides of the bearing outer ring (1), the protective shell (4) for protecting the annular sound absorption box (5) is fixedly connected with the outer side of the annular inner connecting plate (7), and the inner surface of the protective shell (4) is covered with a first reflection layer (12).

2. The low noise bearing of claim 1, wherein: The bearing outer ring (1) and the bearing inner ring (2) are internally provided with a sandwich layer (16), and the inner side of the bearing outer ring (1) and the outer side of the bearing inner ring (2) are respectively provided with a second sound absorption hole (11) between the sandwich layers (16) at positions close to each other.

3. The low noise bearing of claim 2, wherein: The second sound absorption hole (11) is arranged in a plurality of annular arrays around the bearing center axis, the plurality of second sound absorption holes (11) are divided into two rows, and the two rows of second sound absorption holes (11) are arranged on the two sides of the ball.

4. The low noise bearing of claim 2, wherein: The sandwich layer (16) is provided with a second sound absorption layer (10), and the second sound absorption layer (10) is sleeved with a second reflection layer (9).

5. The low noise bearing of claim 2, wherein: The bearing outer ring (1) and the bearing inner ring (2) are provided with mounting grooves (15) on the two sides, and the annular inner connecting plate (7) and the annular outer connecting plate (14) are arranged in the mounting grooves (15).

6. The low noise bearing of claim 5, wherein: A plurality of mounting holes (8) arranged in annular arrays are arranged on the annular inner connecting plate (7) and the annular outer connecting plate (14), and the mounting holes (8) are provided with fixing bolts (3) for threadedly connecting the bearing outer ring (1) and the bearing inner ring (2).

7. The low noise bearing of claim 1, wherein: The cross section of the protective shell (4) is U-shaped, the U-shaped opening of the protective shell (4) faces the annular sound absorption box (5), the annular sound absorption box (5) is arranged on the inner side of the protective shell (4), and the annular sound absorption box (5) is in clearance fit with the protective shell (4).

8. The low noise bearing of claim 7, wherein: The annular sound absorption box (5) is in clearance fit with the bearing inner ring (2).

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