Motor bearing assembly

Abstract

The utility model provides a motor bearing assembly, and belongs to the technical field of bearings. The problem that noise is easily generated due to sealing failure of an existing motor bearing is solved. The motor bearing assembly comprises a motor shaft and a bearing assembly body arranged on the motor shaft, the bearing assembly body is composed of two bearing units and an assembling sleeve, the two bearing units are arranged on the motor shaft in a sleeving mode and connected with the motor shaft, and the assembling sleeve and the motor shaft are coaxially arranged. Sealing units which are connected with the assembling sleeve and used for enhancing the sealing performance are arranged at the two ends of the assembling sleeve, and a noise reduction unit which is connected with the assembling sleeve and has a noise reduction function is arranged in the assembling sleeve. The sealing structure has the advantages of being good in sealing performance and capable of reducing noise.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings and relates to a motor bearing assembly. Background Art

[0002] A motor bearing is a special bearing used for an electric motor. The motor bearing plays a role in supporting and guiding the movement of the shaft and can also bear the components rotating idly on the shaft. The common bearing structure is a rolling steel ball structure. The smooth metal balls roll in the metal surfaces of the inner and outer rings of the bearing to reduce friction, thereby bearing and supporting the rotation of the motor main shaft and enabling the motor to rotate stably. During long-term operation, due to the influence of the environment, its sealing effect will be affected, resulting in wear. At the same time, noise will be generated after wear, thus not meeting the use requirements. Summary of the Invention

[0003] The purpose of the utility model is to provide a motor bearing assembly with good sealing effect and noise reduction for the problems existing in the prior art.

[0004] The purpose of the utility model can be achieved by the following technical solutions: A motor bearing assembly includes a motor shaft and a bearing assembly arranged on the motor shaft. It is characterized in that the bearing assembly consists of two bearing units and a fitting sleeve. The two bearing units are sleeved on the motor shaft and connected thereto. The fitting sleeve is coaxially arranged with the motor shaft. Sealing units are arranged at both ends of the fitting sleeve and connected thereto for enhancing the sealing performance. A noise reduction unit is arranged in the fitting sleeve and connected thereto for reducing noise.

[0005] In the above-mentioned motor bearing assembly, the bearing unit consists of an outer ring, an inner ring, a cage and rolling elements.

[0006] In the above-mentioned motor bearing assembly, the sealing unit is a sealing ring cover. The sealing ring cover is sleeved on the motor shaft and connected to the fitting sleeve by a plurality of studs. A sealing gasket is sleeved on the outer peripheral wall of the motor shaft outside the corresponding sealing ring cover and connected thereto for enhancing the sealing performance.

[0007] In the above-mentioned motor bearing assembly, a sealing ring embedded in the sealing ring cover and used for enhancing the sealing performance is further arranged between the sealing ring cover and the motor shaft.

[0008] In the above-mentioned motor bearing assembly, the noise reduction unit is composed of two assembly rings and a noise reduction cylinder. A radially outwardly protruding convex ring portion is provided on the outer peripheral wall of the motor shaft at the position between the two bearing units. Both of the assembly rings are sleeved on the motor shaft and located between the two bearing units. The above-mentioned assembly rings are in contact with the convex ring portion through the corresponding bearing units. Both ends of the noise reduction cylinder are in contact with the assembly rings. An axially outwardly protruding annular protrusion for supporting the noise reduction cylinder is provided on the end face of the assembly ring in contact with the noise reduction cylinder.

[0009] In the above-mentioned motor bearing assembly, two symmetrically arranged sealing ring plates are further sleeved on the motor shaft. The sealing ring plates are located between the corresponding sealing ring covers and the corresponding bearing units.

[0010] Compared with the prior art, the present motor bearing assembly has the following advantages:

[0011] 1. The bearing assembly is composed of two bearing units and a fitting sleeve. Both of the bearing units are sleeved on the motor shaft and connected thereto. The fitting sleeve is coaxially arranged with the motor shaft. Sealing units connected thereto and used for enhancing the sealing performance are provided at both ends of the fitting sleeve. A noise reduction unit connected thereto and having a noise reduction effect is arranged inside the fitting sleeve. With the above-mentioned structure, certain sound insulation effects are achieved while ensuring the sealing performance. Description of the Drawings

[0012] Figure 1 It is a schematic cross-sectional structure diagram of the motor shaft in the present motor bearing assembly.

[0013] In the figure, 1. Motor shaft; 2. Bearing unit; 3. Fitting sleeve; 4. Sealing ring cover; 5. Sealing gasket; 6. Sealing ring; 7. Assembly ring; 8. Noise reduction cylinder; 9. Convex ring portion; 10. Annular protrusion; 11. Sealing ring plate. Detailed Embodiments

[0014] The following are specific embodiments of the present invention in combination with the drawings. The technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0015] Such as Figure 1As shown in the figure, the motor bearing assembly includes a motor shaft and a bearing assembly arranged on the motor shaft. The bearing assembly consists of two bearing units and a fitting sleeve. The two bearing units are sleeved on the motor shaft and connected thereto. The fitting sleeve is coaxially arranged with the motor shaft, and the inner diameter of the fitting sleeve is larger than the outer diameter of the motor shaft. The bearing units are located between the motor shaft and the fitting sleeve. Sealing units are provided at both ends of the fitting sleeve and are connected thereto for enhancing the sealing performance. A noise reduction unit is provided in the fitting sleeve and is connected thereto for reducing noise. The sealing unit is a sealing ring cover, which is sleeved on the motor shaft and connected to the fitting sleeve by a plurality of stud bolts. A sealing gasket for enhancing the sealing performance is sleeved on the outer peripheral wall of the motor shaft outside the corresponding sealing ring cover, and an elastic folded edge is provided at the end of the sealing gasket that abuts against the sealing cover. The noise reduction unit consists of two assembly rings and a noise reduction cylinder. A convex ring portion protruding radially outward is provided on the outer peripheral wall of the motor shaft between the two bearing units. The two assembly rings are sleeved on the motor shaft and are located between the two bearing units. The above-mentioned assembly rings abut against the convex ring portion through the corresponding bearing units. The outer diameter of the assembly ring is smaller than the inner diameter of the fitting sleeve and is also smaller than the outer diameter of the bearing unit. The vertical cross-section of the assembly ring is arranged in two symmetrically arranged L-shaped structures. The two ends of the noise reduction cylinder respectively abut against the assembly rings. An annular protrusion axially protruding outward and used for supporting the noise reduction cylinder is provided on the end face of the assembly ring that abuts against the noise reduction cylinder. A sound-absorbing cotton cover for sound absorption is provided in the noise reduction cylinder and is connected thereto. A plurality of through holes are provided on the outer peripheral wall of the noise reduction cylinder. Two symmetrically arranged sealing ring plates are also sleeved on the motor shaft. The sealing ring plates are located between the corresponding sealing ring cover and the corresponding bearing unit. A weight-reducing groove is provided on the inner end face of the sealing ring cover.

[0016] As a preferred structure, the bearing unit consists of an outer ring, an inner ring, a cage and rolling elements.

[0017] Furthermore, in order to improve the sealing performance, a sealing ring for enhancing the sealing performance is also provided between the sealing ring cover and the motor shaft and is embedded in the sealing ring cover.

[0018] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0019] Although terms such as etc. are used more frequently herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A motor bearing assembly, comprising a motor shaft (1) and a bearing assembly arranged on the motor shaft (1), characterized in that: The bearing assembly is composed of two bearing units (2) and an assembly sleeve (3); the two bearing units (2) are sleeved on the motor shaft (1) and connected thereto; the assembly sleeve (3) and the motor shaft (1) are coaxially arranged; sealing units connected thereto and used to enhance sealing performance are arranged at both ends of the assembly sleeve (3); and a noise reduction unit connected thereto and having a noise reduction effect is arranged inside the assembly sleeve (3).

2. A motor bearing assembly according to claim 1, characterized in that: The bearing unit (2) is composed of an outer ring, an inner ring, a retaining frame and rolling elements.

3. The motor bearing assembly according to claim 1, characterized in that: The sealing unit is a sealing ring cover (4), which is sleeved on the motor shaft (1) and connected to the assembly sleeve (3) via a plurality of studs. A sealing gasket (5) connected to the sealing ring cover (4) and used to enhance the sealing performance is sleeved on the outer peripheral wall of the motor shaft (1) outside the corresponding sealing ring cover (4).

4. A motor bearing assembly according to claim 3, characterized in that: A sealing ring (6) is also provided between the sealing ring cover (4) and the motor shaft (1), and is embedded in the sealing ring cover (4) and used to enhance the sealing performance.

5. The motor bearing assembly according to claim 1, characterized in that: The noise reduction unit is composed of two assembly rings (7) and a noise reduction cylinder (8). The outer peripheral wall of the motor shaft (1) located between the two bearing units (2) is provided with a convex ring portion (9) protruding radially outward. The two assembly rings (7) are both arranged on the motor shaft (1) and located between the two bearing units (2). The assembly rings (7) are in contact with the convex ring portion (9) through the corresponding bearing units (2). The two ends of the noise reduction cylinder (8) are respectively in contact with the assembly rings (7). The end surface of the assembly ring (7) in contact with the noise reduction cylinder (8) is provided with an annular protrusion (10) protruding axially outward and used to support the noise reduction cylinder (8).

6. The motor bearing assembly according to claim 3, characterized in that: The motor shaft (1) is also sleeved with two symmetrically arranged sealing ring plates (11), and the sealing ring plates (11) are located between the corresponding sealing ring cover (4) and the corresponding bearing unit (2).

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