Low-noise bearing

Abstract

The utility model discloses a low-noise bearing, which comprises a bearing outer ring, a bearing inner ring, a retainer, a ball assembly and a dust cover, the ball assembly is arranged in a raceway between the bearing inner ring and the bearing outer ring through the retainer, and the end face of the raceway is sealed by the dust cover; and the inner side and the outer side of the dustproof cover are tightly connected with the bearing outer ring and the bearing inner ring through a rubber ring respectively. The rubber ring is arranged among the bearing outer ring, the dustproof cover and the bearing inner ring, the rubber ring can isolate vibration transmitted to the retainer by the bearing outer ring, and noise generated by vibration of the dustproof cover of the bearing is avoided.

Description

Technical Field

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

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. During the rotation of the bearing, the ball rolls between the outer ring and the inner ring. Due to the friction between the ball and the outer ring and the inner ring, noise is often generated. In some working environments, noise indicators need to be strictly controlled, and noise reduction of bearings is particularly important. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a low-noise bearing, which can effectively reduce the noise generated during the rotation of the bearing.

[0004] To this end, the technical solution of the utility model is: a low-noise bearing, comprising a bearing outer ring, a bearing inner ring, a cage, a ball assembly and a dust cover, the ball assembly is placed in a raceway between the bearing inner ring and the bearing outer ring through the cage, and the end surface of the raceway is closed by the dust cover;

[0005] The inner side of the bearing outer ring and the outer side of the bearing inner ring are provided with an inward-sunken step surface, and the inner side of the step surface is provided with a clamping groove; the dust cover is an annular structure, and a circle of positioning grooves is provided on the side of the dust cover, and the two sides of the positioning groove are a first edge and a second edge, and the first edge protrudes from the second edge;

[0006] The inner and outer sides of the dust cover are tightly connected to the outer ring and inner ring of the bearing through a rubber ring respectively; the rubber ring includes an annular body, a first retaining ring is provided on one side of the annular body, and a second retaining ring is provided on the other side; the annular body is placed on the step surface, one end is inserted into the retaining groove, and the other end is inserted into the positioning groove, and the first edge is abutted against the outer ring and inner ring of the bearing through the first retaining ring, and the second edge is abutted against the outer ring and inner ring of the bearing through the second retaining ring.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: sound-absorbing cotton is provided on the inner side of the dust cover.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the inner side of the outer ring of the bearing is provided with a first sunken step surface, and the inner side of the first step surface is provided with a first groove; the outer side of the inner ring of the bearing is provided with a second sunken step surface, and the inner side of the second step surface is provided with a second groove.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the inner side of the dust cover is provided with an inner positioning groove, a first inner edge and a second inner edge; the outer side of the dust cover is provided with an outer positioning groove, a first outer edge and a second outer edge, an outer rubber ring is provided between the dust cover and the outer ring of the bearing, and an inner rubber ring is provided between the dust cover and the inner ring of the bearing.

[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: an oil filling hole is provided on the inner ring of the bearing, an oil channel is provided inside, and the outlet of the oil channel faces the ball assembly.

[0011] On the basis of the above scheme and as a preferred scheme of the above scheme: the ball assembly includes a plurality of balls, and the plurality of balls are arranged in the raceway between the outer ring of the bearing and the inner ring of the bearing, and gaps are left between the plurality of balls and the retaining frame.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. A rubber ring is provided between the bearing outer ring, the dust cover and the bearing inner ring. The rubber ring can isolate the vibration transmitted from the bearing outer ring to the retaining frame and avoid the noise generated by the vibration of the bearing dust cover.

[0014] 2. The sound-absorbing cotton pasted on the inside of the dust cover absorbs the noise generated by the rolling of the balls, further reducing the noise during the operation of the bearing.

[0015] 3. An oil filling hole is set on the inner ring of the bearing, and the lubricating oil can be injected into the oil channel. When the ball rolls, the lubricating oil in the oil channel contacts the ball, so that the surface of the ball is coated with lubricating oil. The ball rolls in contact with the inner wall of the outer ring of the bearing, so that the inner wall of the outer ring of the bearing is also coated with lubricating oil, thereby improving the lubrication of the bearing and reducing the noise of the ball rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural sectional view of the utility model;

[0017] Figure 2 for Figure 1 A local enlarged view of point A;

[0018] Figure 3 for Figure 1 A local enlarged view of point B;

[0019] Figure 4 This is a structural sectional view of the dust cover of the utility model;

[0020] Figure 5 It is a structural sectional view of the rubber ring of the utility model.

[0021] Marked in the figure are: bearing outer ring 1, first step surface 11, first groove 12, bearing inner ring 2, second step surface 21, second groove 22, retaining frame 3, ball 4, dust cover 5, inner positioning groove 51, first inner edge 52, second inner edge 53, outer positioning groove 54, first outer edge 55, second outer edge 56, outer rubber ring 6, outer annular body 61, first outer snap ring 62, second outer snap ring 63, inner rubber ring 7, inner annular body 71, first inner snap ring 72, second inner snap ring 73, silencer cotton 8, oil filling hole 9, oil channel 91, dust plug 92. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.

[0024] See the attached drawings. The low-noise bearing of this embodiment comprises a bearing outer ring 1, a bearing inner ring 2, a retainer 3, a ball assembly and a dust cover 5. The ball assembly comprises a plurality of balls 4, which are arranged in a raceway between the bearing outer ring 1 and the bearing inner ring 2, with gaps between the plurality of balls 4 and the retainer 3; the end surface of the raceway is closed by the dust cover 5.

[0025] The inner side of the bearing outer ring 1 is provided with a first step surface 11 which is sunken, and the inner side of the first step surface 11 is provided with a first groove 12; the outer side of the bearing inner ring 2 is provided with a second step surface 21 which is sunken, and the inner side of the second step surface 21 is provided with a second groove 22.

[0026] The dust cover 5 is an annular structure, and an inner positioning groove 51, a first inner edge 52 and a second inner edge 53 are provided on the inner side of the dust cover 5, and the first inner edge 52 protrudes from the second inner edge 53; an outer positioning groove 54, a first outer edge 55 and a second outer edge 56 are provided on the outer side of the dust cover 5, and the first outer edge 55 protrudes from the second outer edge 56.

[0027] An outer rubber ring 6 is provided between the dust cover 5 and the bearing outer ring 1. The outer rubber ring 6 includes an outer annular body 61. A first outer retaining ring 62 is provided on one side of the outer annular body 61, and a second outer retaining ring 63 is provided on the other side. The outer annular body 61 is placed on the first step surface 11, one end of which is inserted into the first retaining groove 12, and the other end of which is inserted into the outer positioning groove 54 of the dust cover 5, and the first outer edge 55 is in contact with the bearing outer ring 1 through the first outer retaining ring 62, and the second outer edge 56 is in contact with the bearing outer ring 1 through the second outer retaining ring 63.

[0028] An inner rubber ring 7 is provided between the dust cover 5 and the bearing inner ring 2. The inner rubber ring 7 includes an inner annular body 71. A first inner snap ring 72 is provided on one side of the inner annular body 71, and a second inner snap ring 73 is provided on the other side. The inner annular body 7 is placed on the second step surface 21, one end of the inner annular body 7 is inserted into the second slot 22, and the other end of the inner positioning slot 51 of the dust cover 5. The first inner edge 52 is in contact with the bearing inner ring 2 through the first inner snap ring 72, and the second inner edge 53 is in contact with the bearing inner ring 2 through the second inner snap ring 73.

[0029] The outer rubber ring can isolate the vibration transmitted from the outer ring of the bearing to the retaining frame, and the inner rubber ring can reduce the vibration between the inner ring of the bearing and the dust cover, thereby avoiding the noise generated by the vibration of the dust cover of the bearing.

[0030] The inner side of the dust cover 5 is provided with a sound-absorbing cotton 8, which can absorb the noise generated by the rolling of the balls and further reduce the noise during the operation of the bearing.

[0031] The bearing inner ring 2 is provided with an oil injection hole 9, an oil passage 91 is provided inside the bearing inner ring 2, the outlet of the oil passage faces the ball 4, and a dust plug 92 is provided on the oil injection hole 9. When in use, the lubricating oil is injected into the oil passage, and when the ball rolls, the lubricating oil in the oil passage contacts the ball, so that the surface of the ball is coated with the lubricating oil, and the ball rolls with the inner wall surface of the bearing outer ring, so that the inner wall surface of the bearing outer ring is also coated with the lubricating oil, thereby improving the lubrication of the bearing and reducing the noise of the ball rotation.

[0032] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A low-noise bearing, comprising a bearing outer ring, a bearing inner ring, a cage, a ball assembly and a dust cover, wherein the ball assembly is placed in a raceway between the bearing inner ring and the bearing outer ring through the cage, and the end surface of the raceway is closed by the dust cover; Features: The inner side of the bearing outer ring and the outer side of the bearing inner ring are provided with an inward-sunken step surface, and the inner side of the step surface is provided with a clamping groove; the dust cover is an annular structure, and a circle of positioning grooves is provided on the side of the dust cover, and the two sides of the positioning groove are a first edge and a second edge, and the first edge protrudes from the second edge; The inner and outer sides of the dust cover are tightly connected to the outer ring and inner ring of the bearing through a rubber ring respectively; the rubber ring includes an annular body, a first retaining ring is provided on one side of the annular body, and a second retaining ring is provided on the other side; the annular body is placed on the step surface, one end is inserted into the retaining groove, and the other end is inserted into the positioning groove, and the first edge is abutted against the outer ring and inner ring of the bearing through the first retaining ring, and the second edge is abutted against the outer ring and inner ring of the bearing through the second retaining ring.

2. A low noise bearing according to claim 1, characterized in that: The inner side of the dust cover is provided with sound-absorbing cotton.

3. A low noise bearing according to claim 1, characterized in that: The inner side of the bearing outer ring is provided with a first step surface which is sunken inwards, and the inner side of the first step surface is provided with a first groove; the outer side of the bearing inner ring is provided with a second step surface which is sunken inwards, and the inner side of the second step surface is provided with a second groove.

4. A low noise bearing according to claim 1, characterized in that: The inner side of the dust cover is provided with an inner positioning groove, a first inner edge and a second inner edge; the outer side of the dust cover is provided with an outer positioning groove, a first outer edge and a second outer edge, an outer rubber ring is provided between the dust cover and the outer ring of the bearing, and an inner rubber ring is provided between the dust cover and the inner ring of the bearing.

5. A low noise bearing according to claim 1, characterized in that: The inner ring of the bearing is provided with an oil filling hole, and an oil channel is provided inside, and the outlet of the oil channel faces the ball assembly.

6. A low noise bearing according to claim 1, characterized in that: The ball assembly comprises a plurality of balls, and the plurality of balls are arranged in a raceway between an outer ring of a bearing and an inner ring of a bearing, and gaps are left between the plurality of balls and a retaining frame.

Images