A shaft sleeve detachable structure and a motor with the same

Abstract

The application relates to a detachable structure of a shaft sleeve and a motor with the structure, which is installed on the motor, and the motor comprises a rotating shaft, a magnetic ring and a bearing, the detachable structure of the shaft sleeve comprises a special-shaped shaft sleeve and a perforated support, the special-shaped shaft sleeve is a stepped structure with different diameters at two ends, the special-shaped shaft sleeve is installed on the rotating shaft and located between the magnetic ring and the bearing, and the perforated support is provided with a dismounting hole for dismounting the special-shaped shaft sleeve. Compared with the prior art, the application has the advantages of reducing maintenance and repair costs and the technological difficulty of dismounting the shaft sleeve, enabling the magnetic ring to be positioned and installed by means of the special-shaped shaft sleeve, and simplifying the installation process.

Description

Technical Field

[0001] This invention relates to an electric motor, and more particularly to a detachable bushing structure and an electric motor having the structure. Background Technology

[0002] like Figure 1 As shown, the existing motor includes a rotating shaft 1, a magnetic ring 2, a bushing 3, a bearing 4, and a bracket 5. The bushing 3 is used for axial positioning of parts on the shaft and is widely used in various applications.

[0003] In the existing motor structure, the bushing 3 is pressed into the rotating shaft 1 by interference fit, which serves to hold the inner ring of the bearing 4 and restrict the axial movement of the bearing 4.

[0004] However, this structure is not conducive to the disassembly and maintenance of the entire machine in the later stages. The bushing 3 is located between the bracket 5 and the rotating shaft 1. Due to the interference of the bearing housing of the bracket 5 and the interference fit between the bushing 3 and the rotating shaft 1, the bushing 3 cannot be easily removed, which increases the maintenance cost and process difficulty of disassembling the motor. Furthermore, the installation of the magnetic ring 2 requires additional tooling for positioning and installation, making the installation process complex. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the prior art by providing a detachable bushing structure and a motor having the structure.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, a detachable bushing structure is provided, which is mounted on a motor, the motor including a rotating shaft, a magnetic ring and a bearing, the detachable bushing structure including a shaped bushing and a perforated bracket, the shaped bushing being a stepped structure with different diameters at both ends, the shaped bushing being mounted on the rotating shaft and located between the magnetic ring and the bearing, and the perforated bracket having a disassembly hole for disassembling the shaped bushing.

[0008] As a preferred technical solution, one end of the irregular bushing is a small end face of the bushing, which abuts against the inner ring of the bearing.

[0009] As a preferred technical solution, one end of the irregular bushing is the large end face of the bushing, which is used for the installation and positioning of the magnetic ring.

[0010] As a preferred technical solution, the diameter of the large end face of the bushing is the same as the diameter of the magnetic ring.

[0011] As a preferred technical solution, the irregular bushing is interference-fitted with the rotating shaft.

[0012] As a preferred technical solution, the irregular bushing is installed between the rotating shaft and the punched bracket.

[0013] As a preferred technical solution, the disassembly hole intersects with the center hole of the punch bracket.

[0014] As a preferred technical solution, the depth of the disassembly hole is greater than the installation depth of the large end face of the bushing.

[0015] As a preferred technical solution, the number of disassembly holes is multiple, designed according to the shape of the bushing disassembly tool.

[0016] According to another aspect of the present invention, an electric motor with a detachable bushing structure is provided, the electric motor including a rotating shaft, a magnetic ring and a bearing, the electric motor further including the aforementioned detachable bushing structure.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1) This invention utilizes the method of drilling holes in the bracket and designing irregularly shaped bushings to truly achieve the detachability of the bushings;

[0019] 2) This invention reduces maintenance and repair costs, and has a simple structure that is easy to process, reducing the difficulty of disassembling the bushing;

[0020] 3) This invention enables the magnetic ring to be positioned and installed using a special-shaped bushing, simplifying the installation process. Attached Figure Description

[0021] Figure 1 A partial cross-sectional view of the existing structure for mounting the bushing on the motor shaft;

[0022] Figure 2 This is a schematic diagram of the overall structure of the motor shaft sleeve mounting of the present invention;

[0023] Figure 3 This is a partial cross-sectional view of the bushing installation on the motor shaft of the present invention;

[0024] Figure 4 for Figure 3 A magnified view of part A;

[0025] Figure 5 This is a schematic diagram of the overall structure of the irregular bushing of the present invention;

[0026] Figure 6 This is a cross-sectional view of the irregular bushing of the present invention;

[0027] Figure 7 This is a schematic diagram of the overall structure of the punch bracket of the present invention;

[0028] Figure 8 This is an end view of the punch bracket of the present invention.

[0029] Figure 1 As indicated by the index number:

[0030] 1. Shaft, 2. Magnetic ring, 3. Bushing, 4. Bearing, 5. Bracket, 6. Other motor components;

[0031] Figure 2 As indicated by the index number:

[0032] 7. Drilled bracket; 8. Special-shaped bushing;

[0033] Figure 5 As indicated by the index number:

[0034] 71. Large end face of the bushing; 72. Small end face of the bushing;

[0035] Figure 7 As indicated by the index number:

[0036] 9. Disassembly hole. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0038] Example 1

[0039] This invention proposes a detachable bushing structure, which adopts a design of a non-shaped bushing 8 and a perforated bracket 7. The specific implementation scheme is as follows:

[0040] like Figure 2 , Figure 3 and Figure 4 As shown, the irregular bushing 8 is interference-fitted onto the rotating shaft 1, located between the drilled bracket 7 and the rotating shaft 1, with one end pressing against the inner ring of the bearing 4 and the other end pressing against the magnetic ring 2.

[0041] like Figure 5 and Figure 6 As shown, the two ends of the irregular bushing 8 have different diameters, forming a stepped structure. The end with the smaller diameter is the small end face 72 of the bushing, and the end with the larger diameter is the large end face 71 of the bushing. The small end face 72 of the bushing presses against the inner ring of the bearing 4, restricting the axial movement of the bearing 4; the large end face 71 of the bushing provides positioning for the magnetic ring 2, and its diameter is the same as that of the magnetic ring 2.

[0042] like Figure 7 and Figure 8 As shown, the punch bracket 7 has a disassembly hole 9 that intersects with the center hole of the punch bracket 7. The size of the disassembly hole 9 is designed according to the tooling dimensions for disassembling the non-shaped bushing 8; as shown Figure 4As shown, the depth of the disassembly hole 9 is designed to be deeper than the mounting location of the large end face 71 of the special-shaped bushing, and the same as or deeper than the depth into the punch bracket 7 when the tooling for disassembling the special-shaped bushing 8 is inserted; the number of disassembly holes 9 is the same as the number of pull claws of the bushing disassembly tooling, and in the case shown in the figure, there are 3.

[0043] The specific method for disassembling and assembling the bushing of this invention is as follows:

[0044] During installation, first press the bearing 4 into the bearing 4 chamber of the drilled bracket 7. The assembly relationship of the special-shaped bushing 8 follows the original scheme, and it is pressed into the rotating shaft 1 with an interference fit. Finally, the magnetic ring 2 is installed according to the positioning of the large end face 71 of the special-shaped bushing 8. The small end face 72 of the special-shaped bushing 8 presses against the inner ring of the bearing 4 to restrict the axial movement of the bearing 4. The large end face 71 of the special-shaped bushing 8 presses against the magnetic ring 2 to position the magnetic ring 2 and facilitate the installation of the magnetic ring 2.

[0045] When disassembling the non-shaped bushing 8, first remove the magnetic ring 2 on the rotating shaft 1, then use a tool to insert it into the hole on the punch bracket 7 and hold the bushing large end face 71 of the non-shaped bushing 8 so that the bushing large end face 71 of the non-shaped bushing 8 is subjected to force. Finally, the non-shaped bushing 8 can be removed with the help of the tool, thus completing the disassembly of the non-shaped bushing 8.

[0046] Example 2

[0047] The present invention also provides a motor with a detachable bushing structure, the motor including a rotating shaft 1, a magnetic ring 2 and a bearing 4, and the motor also including the detachable bushing structure described in Embodiment 1.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A detachable bushing structure, which is mounted on a motor, said motor comprising a rotating shaft (1), a magnetic ring (2), and a bearing (4), characterized in that, The detachable bushing structure includes a special-shaped bushing (8) and a punched bracket (7). The special-shaped bushing (8) is a stepped structure with different diameters at both ends. The special-shaped bushing (8) is mounted on the rotating shaft (1) and located between the magnetic ring (2) and the bearing (4). The punched bracket (7) has a disassembly hole (9) for disassembling the special-shaped bushing (8). The irregular bushing (8) is installed between the rotating shaft (1) and the punched bracket (7); the disassembly hole (9) intersects with the center hole of the punched bracket (7); When disassembling the non-shaped bushing (8), the tool extends into the disassembly hole on the punch bracket (7) and holds the bushing large end face (71) of the non-shaped bushing (8), so that the bushing large end face (71) of the non-shaped bushing (8) is subjected to force, and the non-shaped bushing (8) is removed with the help of the tool.

2. The detachable bushing structure according to claim 1, characterized in that, One end of the irregular bushing (8) is a small end face (72), which abuts against the inner ring of the bearing (4).

3. The detachable bushing structure according to claim 1, characterized in that, The other end of the irregular bushing (8) is the large end face (71) of the bushing, which is used for the installation and positioning of the magnetic ring (2).

4. The detachable bushing structure according to claim 3, characterized in that, The diameter of the large end face (71) of the bushing is the same as the diameter of the magnetic ring (2).

5. The detachable bushing structure according to claim 1, characterized in that, The irregular bushing (8) is interference-fitted with the rotating shaft (1).

6. The detachable bushing structure according to claim 3, characterized in that, The depth of the disassembly hole (9) is greater than the installation depth of the bushing large end face (71).

7. The detachable bushing structure according to claim 1, characterized in that, The number of disassembly holes (9) is multiple, designed according to the shape of the bushing disassembly tool.

8. A motor with a detachable bushing structure, the motor comprising a rotating shaft (1), a magnetic ring (2), and a bearing (4), characterized in that, The motor also includes the detachable bushing structure as described in any one of claims 1-7.

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