Silent bearing with dust cover

Abstract

The utility model relates to bearing technical field discloses a mute bearing with dustproof cover, including top and bottom cover, the top bottom side fixedly connected with a plurality of clamping blocks, the clamping block outer wall fixedly connected with the card sparrow, the bottom cover top is equipped with fixed hole, the top inner wall slidingly connected with the rotating rod, the rotating rod bottom outer wall links with the bottom cover through quick -release assembly, the top and bottom cover similar side is equipped with outer axle, the outer axle inner wall fixedly connected with the outer ring support, the outer ring support outer wall is provided with the roller, the roller outer wall rotatably connected with the retainer, the retainer inboard is provided with the inner axle, the inner axle both sides are equipped with the sound insulation piece, the top and bottom cover inner wall is equipped with the sound -absorbing component. In the utility model, the dustproof cover with the mute bearing can be quickly disassembled, and simultaneously has the noise reduction function, thereby being convenient for maintenance, prolonging the service life of bearing.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to a silent bearing with a dust cover. Background Technology

[0002] As a key component in mechanical equipment, the operating condition of bearings directly affects the performance and lifespan of the entire machine. However, in practical applications, bearings are often subjected to accelerated wear due to the intrusion of external contaminants such as dust and impurities, which in turn leads to problems such as increased noise and shortened lifespan. Therefore, developing a noise-reducing bearing dust cover is of great practical significance.

[0003] Existing bearings typically use a rigid interference fit between the dust cover and the outer ring, which easily generates resonance noise due to vibration during operation. Furthermore, the rigid collision between the steel balls and the metal cage, along with the high surface roughness of the raceway, further exacerbates the noise, failing to meet the requirements of noise-sensitive environments in precision instruments. Traditional dust covers and bearing outer rings are often non-removable stamped structures; adding grease or inspecting internal wear requires damaging the dust cover or even replacing the entire bearing, resulting in high maintenance costs. Some removable dust covers require special tools to pry open, which can easily lead to deformation of the outer ring and expansion of the sealing gap, significantly reducing dustproof performance after reinstallation. To address these technical problems, this application proposes a silent bearing with a dust cover. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a silent bearing with a dust cover. The dust cover of this silent bearing can be quickly removed and also has a built-in noise reduction function, thereby facilitating maintenance and extending the service life of the bearing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A silent bearing with a dust cover includes a top cover and a bottom cover. Multiple locking blocks are fixedly connected to the bottom side of the top cover, and clamps are fixedly connected to the outer walls of the locking blocks. A fixing hole is provided at the top of the bottom cover. A rotating rod is slidably connected to the inner wall of the top cover. The bottom outer wall of the rotating rod is connected to the bottom cover via a quick-release assembly. An outer shaft is installed on the side of the top and bottom covers adjacent to each other. An outer ring support is fixedly connected to the inner wall of the outer shaft. Rollers are provided on the outer wall of the outer ring support. A cage is rotatably connected to the outer wall of the rollers. An inner shaft is provided inside the cage. Sound-absorbing sheets are installed on both sides of the inner shaft. Noise-absorbing components are provided on the inner walls of the top and bottom covers.

[0006] Furthermore, the quick-release assembly includes a limiting block fixedly connected to the outer wall at the bottom of the rotating rod, a spring sleeved on the outer wall at the top of the rotating rod, a retaining ring provided on the top of the spring, a locking hole provided on the outer wall of the rotating rod, an annular groove provided on the outer wall of the limiting block, and the locking hole and the annular groove are formed on the inner wall of the bottom cover.

[0007] Furthermore, the inner wall of the retaining ring is fixedly connected to the rotating rod, and an unlocking hole is provided at the top of the rotating rod.

[0008] Furthermore, one end of the spring is connected to the retaining ring, and the other end of the spring is connected to the top cover.

[0009] Furthermore, the noise reduction assembly includes multiple noise reduction holes located on the inner walls of the top cover and the bottom cover, and multiple tortuous blocks are fixedly connected to the outer walls of the noise reduction holes.

[0010] Furthermore, one end of the roller is connected to the outer ring support, and the other end of the roller is connected to the inner shaft.

[0011] Furthermore, the outer wall of the locking block is connected to the fixing hole, and the outer wall of the locking tenon is connected to the fixing hole.

[0012] This utility model has the following beneficial effects: 1. In this utility model, the dust cover of the silent bearing can be quickly installed and removed through quick-release components and multiple positioning rods, which facilitates the addition of lubricating oil and maintenance of the bearing on the inner wall. At the same time, the dust cover covers the entire bearing, which can prevent dust from entering the bearing.

[0013] 2. In this utility model, the dust cover of the silent bearing can reduce the noise during bearing operation through the noise reduction component, and can cancel the sound emitted by the bearing through the labyrinth channel, thereby further reducing the noise during bearing operation. Attached Figure Description

[0014] Figure 1 A perspective view of a silent bearing with a dust cover proposed in this utility model; Figure 2 This is a diagram showing the internal structure of the dust cover of a silent bearing with a dust cover according to the present invention. Figure 3 This utility model provides a structural diagram of the inner wall of a silent bearing with a dust cover. Figure 4 This utility model presents a structural diagram of a quick-release assembly for a silent bearing with a dust cover.

[0015] Legend: 1. Top cover; 2. Bottom cover; 3. Inner shaft; 4. Unlocking hole; 5. Noise-absorbing hole; 6. Locking block; 7. Clamping tenon; 8. Fixing hole; 9. Rotating rod; 10. Locking hole; 11. Bending block; 12. Sound insulation sheet; 13. Outer shaft; 14. Cage; 15. Outer ring support; 16. Roller; 17. Limiting block; 18. Snap ring; 19. Spring; 20. Annular groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figures 1-3 An embodiment of this utility model provides a silent bearing with a dust cover, comprising a top cover 1 and a bottom cover 2. Multiple locking blocks 6 are fixedly connected to the bottom side of the top cover 1, and locking tabs 7 are fixedly connected to the outer walls of the locking blocks 6. A fixing hole 8 is provided at the top of the bottom cover 2. A rotating rod 9 is slidably connected to the inner wall of the top cover 1. The bottom outer wall of the rotating rod 9 is connected to the bottom cover 2 via a quick-release assembly. An outer shaft 13 is installed on a side close to the top cover 1 and the bottom cover 2. An outer ring support 15 is fixedly connected to the inner wall of the outer shaft 13. Rollers 16 are provided on the outer wall of the outer ring support 15. A retainer 14 is rotatably connected to the outer wall of the rollers 16. An inner shaft 3 is provided inside the retainer 14. Sound-insulating sheets 12 are installed on both sides of the inner shaft 3. Noise-absorbing components are provided on the inner walls of the top cover 1 and the bottom cover 2.

[0018] Specifically, the top cover 1 and bottom cover 2 are installed onto the outer wall of the bearing using quick-release components and positioned using multiple clips 6 and fixing holes 8. After installation, the clamps 7 are fixed in the fixing holes 8 to prevent the top cover 1 and bottom cover 2 from coming off. At the same time, the top cover 1 and bottom cover 2 prevent dust from entering the bearing. The rotation of the inner shaft 3 will drive the rollers 16 on the cage 14 to rotate on the outer ring support 15. The rollers 16 are coated with lubricating oil to ensure smooth rotation of the inner shaft 3. The sound insulation sheet 12 will reduce the noise when the bearing rotates. At the same time, the sound-absorbing components on the inner walls of the top cover 1 and bottom cover 2 will further reduce the transmission of sound.

[0019] Reference Figures 2-4The quick-release assembly includes a limiting block 17 fixedly connected to the bottom outer wall of the rotating rod 9, a spring 19 sleeved on the top outer wall of the rotating rod 9, a retaining ring 18 at the top of the spring 19, a locking hole 10 on the outer wall of the rotating rod 9, an annular groove 20 on the outer wall of the limiting block 17, the locking hole 10 and the annular groove 20 being formed on the inner wall of the bottom cover 2, the inner wall of the retaining ring 18 being fixedly connected to the rotating rod 9, an unlocking hole 4 being formed at the top of the rotating rod 9, one end of the spring 19 being connected to the retaining ring 18, and the other end of the spring 19 being connected to the top cover 1. During installation... First, press the rotating rod 9 up and down on the top cover 1. Then, insert the rotating rod 9 into the locking hole 10. After inserting it to the bottom, rotate the rotating rod 9 through the unlocking hole 4 on the top side of the rotating rod 9. This causes the limiting block 17 on the bottom side of the rotating rod 9 to rotate in the annular groove 20. After rotating 90 degrees, release the unlocking hole 4 and the rotating rod 9. The spring 19 pushes the retaining ring 18 upward in the top cover 1, thereby causing the limiting block 17 on the rotating rod 9 to move upward and thus lock in the annular groove 20 on the inner wall of the bottom cover 2, thereby fixing the top cover 1 on the bottom cover 2.

[0020] The noise reduction assembly includes multiple noise reduction holes 5 located on the inner walls of the top cover 1 and the bottom cover 2. Multiple bend blocks 11 are fixedly connected to the outer walls of the noise reduction holes 5. The sound generated by the bearing rotation is absorbed through the noise reduction holes 5 and forms a labyrinth channel through the multiple bend blocks 11 connected in an alternating manner within the noise reduction holes 5. The sound waves are reflected multiple times within the bend channel, and the energy gradually attenuates. The sound waves on different paths generate a phase difference, and some frequencies cancel each other out, thereby reducing the sound of the bearing rotation.

[0021] One end of the roller 16 is connected to the outer ring support 15, and the other end of the roller 16 is connected to the inner shaft 3. The sliding friction of the roller 16 is converted into rolling friction, which reduces energy loss and provides stable rotational support for the shaft and the parts on the shaft.

[0022] The outer wall of the locking block 6 is connected to the fixing hole 8, and the outer wall of the clamp 7 is connected to the fixing hole 8. After the locking block 6 extends into the fixing hole 8, it is fixed in the fixing hole 8 by the clamp 7.

[0023] Working principle: During installation, first press the rotating rod 9 down on the top cover 1, then insert the rotating rod 9 into the locking hole 10. After inserting it to the bottom, rotate the rotating rod 9 through the unlocking hole 4 on the top side of the rotating rod 9. This causes the limiting block 17 on the bottom side of the rotating rod 9 to rotate in the annular groove 20. After rotating 90 degrees, release the unlocking hole 4 and the rotating rod 9. The spring 19 pushes the retaining ring 18 upward in the top cover 1, thereby causing the limiting block 17 on the rotating rod 9 to move upward, thus locking it in the annular groove 20 on the inner wall of the bottom cover 2. This fixes the top cover 1 onto the bottom cover 2, and positions it through multiple locking blocks 6 and fixing holes 8. After installation, the tenon 7 will be fixed. In the fixing hole 8, the top cover 1 and bottom cover 2 are prevented from coming out. The top cover 1 and bottom cover 2 can prevent dust from entering the bearing. The rotation of the inner shaft 3 will drive the roller 16 on the cage 14 to rotate on the outer ring support 15. The roller 16 is coated with lubricating oil to ensure smooth rotation of the inner shaft 3. The sound insulation sheet 12 will reduce the sound when the bearing rotates. The sound emitted by the bearing rotation will be absorbed by the sound-absorbing hole 5 and form a labyrinth channel through multiple interlaced tortuous blocks 11 in the sound-absorbing hole 5. The sound waves are reflected multiple times in the tortuous channel, and the energy gradually decays. The sound waves on different paths produce a phase difference, and some frequencies cancel each other out, thereby reducing the sound of the bearing rotation.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A silent bearing with a dust cover, characterized by: Includes a top cover (1) and a bottom cover (2). The bottom of the top cover (1) is fixedly connected to a plurality of locking blocks (6). The outer wall of the locking blocks (6) is fixedly connected to a tenon (7). The top of the bottom cover (2) is provided with a fixing hole (8). The inner wall of the top cover (1) is slidably connected to a rotating rod (9). The bottom outer wall of the rotating rod (9) is connected to the bottom cover (2) through a quick-release assembly. An outer shaft (13) is installed on the side of the top cover (1) and the bottom cover (2). An outer ring support (15) is fixedly connected to the inner wall of the outer shaft (13). A roller (16) is provided on the outer wall of the outer ring support (15). A retainer (14) is rotatably connected to the outer wall of the roller (16). An inner shaft (3) is provided on the inner side of the retainer (14). Sound insulation plates (12) are installed on both sides of the inner shaft (3). A sound-absorbing assembly is provided on the inner wall of the top cover (1) and the bottom cover (2).

2. The silent bearing with dust cover according to claim 1, characterized in that: The quick-release assembly includes a limiting block (17) fixedly connected to the bottom outer wall of the rotating rod (9), a spring (19) sleeved on the top outer wall of the rotating rod (9), a retaining ring (18) provided on the top of the spring (19), a locking hole (10) provided on the outer wall of the rotating rod (9), and an annular groove (20) provided on the outer wall of the limiting block (17). The locking hole (10) and the annular groove (20) are opened on the inner wall of the bottom cover (2).

3. A silent bearing with a dust cover according to claim 2, characterized in that: The inner wall of the retaining ring (18) is fixedly connected to the rotating rod (9), and the top of the rotating rod (9) is provided with an unlocking hole (4).

4. A silent bearing with a dust cover according to claim 2, characterized in that: One end of the spring (19) is connected to the retaining ring (18), and the other end of the spring (19) is connected to the top cover (1).

5. A silent bearing with a dust cover according to claim 1, characterized in that: The noise reduction assembly includes multiple noise reduction holes (5) located on the inner walls of the top cover (1) and the bottom cover (2), and multiple tortuous blocks (11) are fixedly connected to the outer walls of the noise reduction holes (5).

6. A silent bearing with a dust cover according to claim 1, characterized in that: One end of the roller (16) is connected to the outer ring support (15), and the other end of the roller (16) is connected to the inner shaft (3).

7. A silent bearing with a dust cover according to claim 1, characterized in that: The outer wall of the card block (6) is connected to the fixing hole (8), and the outer wall of the clasp (7) is connected to the fixing hole (8).

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