A vibration isolation bearing structure for an electric machine

Abstract

The utility model relates to the technical field of shock insulation bearing structure, especially motor's shock insulation bearing structure, its realization is overall effective isolation to radial and axial vibration, and the simple structure of lower vibration isolation cover and upper vibration isolation cover can be directly set on the standard bearing, and the main structure such as motor casing need not carry out complicated change, and the utility model is easy to produce and assemble, and low in cost, including lower casing, stator assembly, first bearing, shaft, second bearing, magnetic ring fixed sleeve and upper casing, lower casing and upper casing assembly connection, stator assembly sets up on the upper casing inboard wall, and first bearing and second bearing are installed at the both ends of shaft respectively, and the rotor is provided on the shaft, and first bearing and second bearing are installed in lower casing and upper casing respectively, and the magnetic ring fixed sleeve is installed on the upper casing inboard wall and is set on the shaft, still including lower vibration isolation cover and upper vibration isolation cover, and lower vibration isolation cover and upper vibration isolation cover are respectively set on the outer ring of first bearing and second bearing.

Description

Technical Field

[0001] This utility model relates to the technical field of vibration isolation bearing structures, and in particular to a vibration isolation bearing structure for motors. Background Technology

[0002] Brushless motors are widely used in various industrial and consumer electronics products due to their high efficiency, long lifespan, and low noise. During operation, the rotor and its shaft system inevitably vibrate, including radial and axial vibrations. These vibrations are transmitted to the housing through the bearings, generating noise, affecting the user experience, and even impacting the reliability of the motor and related components over long-term use.

[0003] For example, the existing technology announcement number CN209818525U discloses a high-efficiency vibrating screen special bearing, including a bearing outer ring, an outer ring outer component, a pressure-resistant and wear-resistant layer, a bearing lower roller and vibration isolation rubber. The outer ring outer component is welded inside the bearing outer ring, and an outer ring inner component is fixed inside the bearing outer ring on one side of the outer ring outer component. The bearing middle ring is provided on the inner side of the bearing outer ring, and bearing upper rollers with equal spacing are installed at one end of the surface of the bearing middle ring.

[0004] In the prior art, in order to reduce vibration transmission, elastic components such as rubber rings are usually placed between the bearing and the bearing housing. However, such solutions can only alleviate axial vibration to a certain extent and have limited effect on suppressing radial vibration. Therefore, there is a need for a solution that can effectively isolate both radial and axial vibration at the same time and is structurally stable and durable. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a vibration isolation bearing structure for motors that achieves comprehensive and effective isolation of radial and axial vibrations. The lower and upper vibration isolation sleeves have simple structures and can be directly fitted onto standard bearings without complex modifications to the main structures such as the motor housing. It is easy to manufacture and assemble and has low cost.

[0006] This utility model discloses a vibration isolation bearing structure for an electric motor, comprising a lower housing, a stator assembly, a first bearing, a shaft, a second bearing, a magnetic ring fixing sleeve, and an upper housing. The lower housing and the upper housing are assembled and connected. The stator assembly is disposed on the inner side wall of the upper housing. The first bearing and the second bearing are respectively mounted at both ends of the shaft, and a rotor is mounted on the shaft. The first bearing and the second bearing are respectively mounted inside the lower housing and the upper housing. The magnetic ring fixing sleeve is mounted on the inner side wall of the upper housing and sleeved on the shaft. It also includes a lower vibration isolation sleeve and an upper vibration isolation sleeve, which are respectively fitted onto the outer rings of the first bearing and the second bearing. Bearing chambers are provided inside the lower housing and the upper housing. The bearings are installed in the bearing housing. By setting the outer walls of the first and second bearings on the lower and upper vibration isolation sleeves respectively, the outer rings of the first and second bearings are completely isolated from the side walls and end faces of the bearing housing. The lower and upper vibration isolation sleeves are elastic in both the radial and axial directions. When the shaft vibrates radially or axially, the side walls of the lower and upper vibration isolation sleeves will undergo elastic deformation to absorb the vibration energy, thereby achieving comprehensive and effective isolation of radial and axial vibrations. The lower and upper vibration isolation sleeves have a simple structure and can be directly fitted onto standard bearings without complex modifications to the main structures such as the motor housing. They are easy to manufacture and assemble, and have low cost.

[0007] Preferably, the lower vibration isolation sleeve and the upper vibration isolation sleeve include a sleeve portion that mates with the outer rings of the first bearing and the second bearing. The axial side of the sleeve portion extends to form an end face. There is a gap between the radial outer side of the sleeve portion and the side wall of the bearing chamber. The end face and the radial outer surface of the sleeve portion are wavy. By designing the lower vibration isolation sleeve and the upper vibration isolation sleeve to have wavy shapes on both the side and end faces, the structure has elasticity in both the radial and axial directions. When the rotor shaft system generates radial vibration, the wavy side wall of the sleeve portion will undergo elastic deformation to absorb vibration energy. When axial vibration occurs, the wavy end face will undergo elastic deformation to absorb vibration energy, thereby achieving comprehensive and effective isolation of radial and axial vibration.

[0008] Preferably, the lower vibration isolation sleeve and the upper vibration isolation sleeve are made of metal; using metal materials instead of rubber parts avoids problems such as material aging and creep, ensures the long-term stability of vibration isolation performance, and extends the service life of the motor.

[0009] Preferably, the lower vibration isolation sleeve and the upper vibration isolation sleeve are respectively interference-fitted onto the first bearing and the second bearing; this prevents abnormal noise or loosening under vibration conditions and ensures high reliability.

[0010] Preferably, it also includes an encoder PCB board, which is located inside the upper housing; this improves the convenience of motor control.

[0011] Preferably, it also includes an aluminum cover, which is installed on the upper housing; by opening the aluminum cover, the convenience of inspection and maintenance of the interior of the upper housing is improved.

[0012] Preferably, the lower housing and the upper housing are connected by multiple sets of screws, which improves the ease of assembly of the motor housing.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting the outer side walls of the first bearing and the second bearing respectively on the lower vibration isolation sleeve and the upper vibration isolation sleeve, the outer rings of the first bearing and the second bearing are completely isolated from the side wall surface and end face of the bearing chamber. The lower vibration isolation sleeve and the upper vibration isolation sleeve are elastic in both radial and axial directions. When the shaft generates radial or axial vibration, the side walls of the lower vibration isolation sleeve and the upper vibration isolation sleeve will undergo elastic deformation to absorb vibration energy, thereby achieving comprehensive and effective isolation of radial and axial vibration. The lower vibration isolation sleeve and the upper vibration isolation sleeve have a simple structure and can be directly fitted onto standard bearings without complex modifications to the main structure such as the motor housing. They are easy to produce and assemble, and have low cost. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the connection between the first bearing and the shaft, etc. Figure 3 This is a partial structural diagram showing the connection between the second bearing and the upper vibration isolation sleeve, etc.

[0015] The following are labels in the attached diagram: 1. Lower housing; 2. Stator assembly; 3. Lower vibration isolation sleeve; 4. First bearing; 5. Shaft; 6. Second bearing; 7. Upper vibration isolation sleeve; 8. Magnetic ring fixing sleeve; 9. Encoder PCB board; 10. Upper housing; 11. Aluminum cover; 12. Screw. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0017] Example 1 like Figures 1 to 3As shown, this utility model discloses a vibration isolation bearing structure for an electric motor, comprising a lower housing 1, a stator assembly 2, a first bearing 4, a shaft 5, a second bearing 6, a magnetic ring fixing sleeve 8, and an upper housing 10. The lower housing 1 and the upper housing 10 are assembled and connected. The stator assembly 2 is disposed on the inner side wall of the upper housing 10. The first bearing 4 and the second bearing 6 are respectively installed at both ends of the shaft 5, and a rotor is disposed on the shaft 5. The first bearing 4 and the second bearing 6 are respectively installed inside the lower housing 1 and the upper housing 10. The magnetic ring fixing sleeve 8 is installed on the inner side wall of the upper housing 10 and sleeved on the shaft 5. It also includes a lower vibration isolation sleeve 3 and an upper vibration isolation sleeve 7, which are respectively sleeved on the outer rings of the first bearing 4 and the second bearing 6. Bearing chambers are provided inside the lower housing 1 and the upper housing 10, and the first bearing 4 and the second bearing 6 are installed inside the bearing chambers. like Figure 1 As shown, the lower vibration isolation sleeve 3 and the upper vibration isolation sleeve 7 include a sleeve portion that mates with the outer ring of the first bearing 4 and the second bearing 6. The sleeve portion extends axially to form an end face, and there is a gap between the radial outer side of the sleeve portion and the side wall of the bearing chamber. The end face and the radial outer surface of the sleeve portion are wavy. In this embodiment, by setting the outer sidewalls of the first bearing 4 and the second bearing 6 on the lower vibration isolation sleeve 3 and the upper vibration isolation sleeve 7 respectively, the outer rings of the first bearing 4 and the second bearing 6 are completely isolated from the sidewalls and end faces of the bearing housing. The lower vibration isolation sleeve 3 and the upper vibration isolation sleeve 7 are elastic in both the radial and axial directions. When the shaft 5 generates radial or axial vibration, the sidewalls of the lower vibration isolation sleeve 3 and the upper vibration isolation sleeve 7 will undergo elastic deformation to absorb vibration energy, thereby achieving comprehensive and effective isolation of radial and axial vibration. The lower vibration isolation sleeve 3 and the upper vibration isolation sleeve 7 have simple structures and can be directly fitted onto standard bearings without complex modifications to the main structures such as the motor housing. They are easy to manufacture and assemble, and have low cost.

[0018] Example 2 Based on Example 1, such as Figure 1 As shown, this utility model discloses a vibration isolation bearing structure for an electric motor, wherein the lower vibration isolation sleeve 3 and the upper vibration isolation sleeve 7 are made of metal. like Figure 1 As shown, the lower vibration isolation sleeve 3 and the upper vibration isolation sleeve 7 are respectively interference-fitted onto the first bearing 4 and the second bearing 6; like Figure 1 As shown, it also includes an encoder PCB board 9, which is disposed inside the upper housing 10; like Figure 2 As shown, it also includes an aluminum cover 11, which is mounted on the upper housing 10; like Figure 2 As shown, the lower housing 1 and the upper housing 10 are connected by multiple sets of screws 12; In this embodiment, by designing the lower vibration isolation sleeve 3 and the upper vibration isolation sleeve 7 with wavy shapes on both the sides and ends, the structure has elasticity in both the radial and axial directions. When the rotor shaft system generates radial vibration, the side wall of the wavy sleeve will undergo elastic deformation to absorb vibration energy. When axial vibration occurs, the end face of the wavy sleeve will undergo elastic deformation to absorb vibration energy, thereby achieving comprehensive and effective isolation of radial and axial vibration. The use of metal materials instead of rubber parts avoids problems such as material aging and creep, ensuring the long-term stability of vibration isolation performance and extending the service life of the motor.

[0019] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A vibration isolation bearing structure for an electric motor, comprising a lower housing (1), a stator assembly (2), a first bearing (4), a shaft (5), a second bearing (6), a magnetic ring fixing sleeve (8), and an upper housing (10), wherein the lower housing (1) and the upper housing (10) are assembled and connected, the stator assembly (2) is disposed on the inner wall of the upper housing (10), the first bearing (4) and the second bearing (6) are respectively mounted on both ends of the shaft (5), a rotor is disposed on the shaft (5), the first bearing (4) and the second bearing (6) are respectively mounted inside the lower housing (1) and the upper housing (10), and the magnetic ring fixing sleeve (8) is mounted on the inner wall of the upper housing (10) and sleeved on the shaft (5); characterized in that, It also includes a lower vibration isolation sleeve (3) and an upper vibration isolation sleeve (7), which are respectively fitted on the outer rings of the first bearing (4) and the second bearing (6). Bearing chambers are provided in the lower housing (1) and the upper housing (10), and the first bearing (4) and the second bearing (6) are installed in the bearing chambers.

2. The vibration isolation bearing structure for an electric motor as described in claim 1, characterized in that, The lower vibration isolation sleeve (3) and the upper vibration isolation sleeve (7) include a sleeve portion that mates with the outer ring of the first bearing (4) and the second bearing (6). The sleeve portion extends axially to form an end face. There is a gap between the radial outer side of the sleeve portion and the side wall of the bearing chamber. The end face and the radial outer surface of the sleeve portion are wavy.

3. The vibration isolation bearing structure for an electric motor as described in claim 1, characterized in that, The lower vibration isolation sleeve (3) and the upper vibration isolation sleeve (7) are made of metal.

4. The vibration isolation bearing structure for an electric motor as described in claim 1, characterized in that, The lower vibration isolation sleeve (3) and the upper vibration isolation sleeve (7) are respectively interference-fitted onto the first bearing (4) and the second bearing (6).

5. The vibration isolation bearing structure for an electric motor as described in claim 1, characterized in that, It also includes an encoder PCB board (9), which is located inside the upper housing (10).

6. The vibration isolation bearing structure for an electric motor as described in claim 1, characterized in that, It also includes an aluminum cover (11), which is mounted on the upper housing (10).

7. The vibration isolation bearing structure for an electric motor as described in claim 1, characterized in that, The lower housing (1) and the upper housing (10) are connected by multiple sets of screws (12).

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