Silent rolling bearing

Abstract

The utility model discloses a silent rolling bearing, which is characterized in that the two end parts of the outer surface of an inner ring are connected with protective covers for reducing the contact between balls and external impurities, the outer surfaces, close to the balls, of the protective covers are connected with silence rings, and the silence rings form silence spaces for silence of the balls; the mute ring is of a multi-layer structure and is sequentially provided with a fixed ring layer, a filling ring layer, a sound insulation ring layer, a filling ring layer and a fixed ring layer from inside to outside, the interior of the sound insulation ring layer is hollow and is filled with a sound absorption material, and the bearing is provided with a protective cover, so that noise generated by friction between balls and external impurities can be greatly reduced; the silence ring for achieving the silence effect through sound insulation is arranged, and the filling ring layer and the sound insulation ring layer in the silence ring can achieve the silence effect through vibration absorption, so that the silence effect of the bearing is further improved; the protection cover and the mute ring connected to the protection cover can be installed on the inner ring in an interference connection mode, and the whole structure is simple and easy to install.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling bearings, in particular to a silent rolling bearing. Background Art

[0002] Rolling bearings usually include an inner ring, an outer ring, and balls arranged between the inner ring and the outer ring. Existing rolling bearings will produce annoying noise when impurities enter the bearing and rub against the balls. The balls themselves will also produce considerable noise when rolling and rubbing against the inner and outer rings during rotation. The noise will mainly be transmitted outward from the gap between the outer ring and the inner ring, which will bring a bad experience to the user during the use of the rolling bearing. In addition, insufficient bearing lubrication, dry friction, and improper shape matching and deformation of adjacent parts of the inner and outer rings of the bearing will also cause the rolling bearing to produce noise during use. Therefore, it is necessary to design a silent rolling bearing with good silencing effect. Utility Model Content

[0003] The utility model aims to provide a silent rolling bearing, which solves the problem of high working noise of the existing rolling bearing.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A silent rolling bearing comprises an inner ring, an outer ring, and balls arranged between the inner ring and the outer ring, the outer surface of the inner ring is connected to both ends with protective covers for reducing the contact between the balls and external impurities, the protective covers are connected to silent rings on the outer surfaces close to the balls, the silent rings form a silent space for silent balls, the silent rings are of a multi-layer structure and are provided with a fixed ring layer, a filling ring layer, a sound insulation ring layer, a filling ring layer and a fixed ring layer in sequence from the inside to the outside, the sound insulation ring layer is hollow inside and filled with sound absorbing material.

[0006] Furthermore, the outer surface of the inner ring and the inner surface of the outer ring are both fixedly connected with limiting ridges, and the limiting ridges on the inner ring and the limiting ridges on the outer ring cooperate with each other to limit the ball.

[0007] Furthermore, the fixing ring layer is composed of corrugated paper and an aluminum foil layer coated on the corrugated paper.

[0008] Furthermore, the filler in the filling ring layer is a plastic ball.

[0009] Furthermore, the diameter of the plastic ball is 0.8-1.2 mm.

[0010] Furthermore, the sound insulation ring layer is composed of hollow aluminum and sound-absorbing cotton filled inside the hollow aluminum.

[0011] Furthermore, the protective cover is interference connected with the inner ring.

[0012] The beneficial effects of the utility model are as follows: (1) The rolling bearing is provided with a protective cover, which can greatly reduce the noise generated by the friction between the ball and external impurities; a silent ring is provided to achieve a silent effect by sound insulation, and the filling ring layer and the sound insulation ring layer provided in the silent ring can achieve a silent effect by absorbing vibration, further improving the silent effect of the bearing. (2) The protective cover and the silent ring connected to the protective cover can be installed on the inner ring through an interference fit, and the overall structure is simple and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the silent ring of the utility model.

[0015] In the figure: 1. Inner ring; 2. Outer ring; 3. Ball; 4. Protective cover; 5. Silent ring; 6. Fixed ring layer; 7. Filling ring layer; 8. Sound insulation ring layer; 9. Limiting ridge. DETAILED DESCRIPTION

[0016] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0017] like Figure 1-2 As shown, a silent rolling bearing comprises an inner ring 1, an outer ring 2, and balls 3 arranged between the inner ring 1 and the outer ring 2, the outer surface of the inner ring 1 is connected to both ends with protective covers 4 for reducing the contact between the balls 3 and external impurities, the protective covers 4 are connected to silent rings 5 ​​on the outer surfaces close to the balls 3, the silent rings 5 ​​form a silent space for the silent balls 3, the silent rings 5 ​​are of a multi-layer structure and are provided with a fixed ring layer 6, a filling ring layer 7, a sound insulation ring layer 8, a filling ring layer 7 and a fixed ring layer 6 in sequence from the inside to the outside, the sound insulation ring layer 8 is hollow inside and filled with sound-absorbing material.

[0018] Working principle: Under the protection of the protective cover 4, the noise generated by the friction between the ball and external impurities can be greatly reduced. The silent ring 5 forms a silent space for the silent ball 3, which can achieve a silent effect through sound insulation, and the sound-absorbing material in the sound insulation ring layer 8 can reduce noise by absorbing the vibration energy of sound waves, so that the bearing can not only isolate the noise, but also absorb its sound wave energy during the noise propagation process. The overall silent effect will be better. The silent ring 5 can be connected to the outer surface of the ball 3 by bonding.

[0019] Preferably, limiting ridges 9 are fixedly connected to the outer surface of the inner ring 1 and the inner surface of the outer ring 2. The limiting ridges 9 on the inner ring 1 cooperate with the limiting ridges 9 on the outer ring 2 to limit the balls 3. The limiting ridges 9 are arranged in several groups according to the number of balls 3. The number of groups of limiting ridges 9 should correspond to the number of balls 3 one by one, and the balls 3 in the limiting ridges 9 are evenly distributed along the outer surface of the inner ring 1. The limiting ridges 9 limit the balls 3 to prevent the balls 3 from escaping from between the inner ring 1 and the outer ring 2.

[0020] Preferably, the fixed ring layer 6 is composed of corrugated paper and an aluminum foil layer wrapped on the corrugated paper, the aluminum foil layer has good formability and thermal conductivity, and the corrugated paper has good anti-extrusion performance, so that the fixed ring layer 6 as a whole has a certain anti-compression property, which is used to provide buffering and protect the filling ring layer 7 and the sound insulation ring layer 8 inside the silent ring 5.

[0021] Preferably, the filler in the filling ring layer 7 is a plastic ball. The plastic ball can absorb the energy of the sound wave by absorbing vibration, so as to achieve the effect of reducing noise and improve the quiet effect of the bearing.

[0022] Preferably, the diameter of the plastic ball is 0.8-1.2 mm.

[0023] Preferably, the sound insulation ring layer 8 is composed of hollow aluminum and sound-absorbing cotton filled inside the hollow aluminum. After the sound enters the porous sound-absorbing cotton, the sound energy is converted into heat energy through vibration and friction, which consumes the sound energy, can reduce noise, and further improve the quiet effect of the bearing.

[0024] Preferably, the protective cover 4 is interference connected with the inner ring 1. The interference connection between the protective cover 4 and the inner ring 1 usually needs to be achieved with the aid of an impact tool that can apply a large pressure. The protective cover 4 and the silent ring 5 connected to the protective cover 4 are installed on the inner ring 1 through an interference connection. The overall structure is relatively simple, which is convenient for installing the bearing.

[0025] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A silent rolling bearing, comprising an inner ring (1), an outer ring (2), and balls (3) arranged between the inner ring (1) and the outer ring (2), characterized in that: Both ends of the outer surface of the inner ring (1) are connected to protective covers (4) for reducing contact between the ball (3) and external impurities. The protective covers (4) are connected to silent rings (5) on the outer surface close to the ball (3). The silent rings (5) form a silent space for the silent ball (3). The silent rings (5) are multi-layered structures and are provided with a fixed ring layer (6), a filling ring layer (7), a sound insulation ring layer (8), a filling ring layer (7) and a fixed ring layer (6) in sequence from the inside to the outside. The sound insulation ring layer (8) is hollow inside and filled with sound absorbing material.

2. A silent rolling bearing according to claim 1, characterized in that: The outer surface of the inner ring (1) and the inner surface of the outer ring (2) are both fixedly connected with limiting ridges (9); the limiting ridges (9) on the inner ring (1) and the limiting ridges (9) on the outer ring (2) cooperate with each other to limit the ball (3).

3. A silent rolling bearing according to claim 1, characterized in that: The fixing ring layer (6) is composed of corrugated paper and an aluminum foil layer coated on the corrugated paper.

4. A silent rolling bearing according to claim 1, characterized in that: The filler in the filling ring layer (7) is a plastic ball.

5. A silent rolling bearing according to claim 4, characterized in that: The diameter of the plastic ball is 0.8-1.2 mm.

6. A silent rolling bearing according to claim 1, characterized in that: The sound insulation ring layer (8) is composed of hollow aluminum and sound-absorbing cotton filled inside the hollow aluminum.

7. A silent rolling bearing according to claim 1, characterized in that: The protective cover (4) is interference-connected with the inner ring (1).

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