Direct-current brushless motor convenient to disassemble

Abstract

The utility model discloses a direct current brushless motor convenient to disassemble in the technical field of direct current brushless motors, which comprises a top cover, a shell, a base, a stator and a shaft core, the stator is arranged in the shell, the top cover is arranged at the upper end of the shell and is detachably connected with the shell, the base is arranged at the bottom of the shell and is detachably connected with the shell, and the shaft core is arranged in the shell. The base is provided with a shaft hole and a bearing which are used for being rotationally connected with the shaft core, at least one through hole is formed in the end, close to the shell, of the top cover, at least one bolt hole is formed in the end, close to the top cover, of the shell, the top cover is in fastening connection with the shell through a locking bolt, and at least one limiting hole is formed in the base. At least one limiting column integrally formed with the shell is arranged at one end, close to the base, of the shell, the limiting columns are arranged in the limiting holes and are in interference fit with the limiting holes, when the shell is reinstalled, the shaft core is inserted into the bearing, the stator is arranged on the outer side of the shaft core in a sleeving mode, and the concentricity of the stator rotor and the rotor assembly is guaranteed through the shaft hole of the base and the bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of direct current brushless motors, in particular to a direct current brushless motor which is easy to disassemble. Background Art

[0002] The structure of a DC motor should consist of two parts: the stator and the rotor. The stationary part of a DC motor is called the stator. Its main function is to generate a magnetic field. The rotating part is called the rotor. Its main function is to generate electromagnetic torque and induced electromotive force. It is the hub of energy conversion for DC motors, so it is usually called the armature. DC motors are widely used because of their good speed regulation performance.

[0003] However, when the brushless DC motor is currently disassembled for repair, a special tooling fixture is required to adjust the concentricity of the stator assembly and the rotor assembly during reinstallation, which is troublesome to install. In addition, the entire housing needs to be removed during disassembly, and the disassembly steps are relatively cumbersome. Utility Model Content

[0004] In order to overcome the deficiencies of the existing technical solutions, the utility model provides a DC brushless motor that is easy to disassemble, which can effectively solve the technical problems that when the current DC brushless motor is disassembled and repaired, a special tooling fixture needs to be used to adjust the concentricity of the stator assembly and the rotor assembly during reinstallation, the installation is relatively troublesome, and the entire casing needs to be taken out during disassembly, and the disassembly steps are relatively cumbersome.

[0005] The utility model solves the technical problem by adopting the following technical solution: a conveniently disassembled DC brushless motor, comprising a top cover, a shell, a base, a stator and a shaft core, wherein the stator is arranged inside the shell, the top cover is arranged at the upper end of the shell and is detachably connected thereto, the base is arranged at the bottom of the shell and is detachably connected thereto, and the base is provided with a shaft hole and a bearing for rotationally connecting with the shaft core;

[0006] The top cover is provided with at least one through hole at one end close to the outer shell, and the outer shell is provided with at least one bolt hole at one end close to the top cover. The top cover is fastened to the outer shell by a locking bolt. The base is provided with at least one limiting hole, and the outer shell is provided with at least one limiting column integrally formed therewith at one end close to the base. The limiting column is arranged inside the limiting hole and is interference connected therewith.

[0007] Preferably, at least one first heat dissipation hole is opened on the side of the top cover, and the first heat dissipation holes are distributed in a circular array with the center point of the top cover as the center.

[0008] Preferably, a plurality of evenly distributed stator chips are fixedly disposed on the inner wall of the shell, the stator chips are rectangular, and there is a gap between the stators and the stator chips.

[0009] Preferably, at least one positioning protrusion integrally formed therewith is provided at one end of the shell close to the top cover, at least one positioning hole is opened at the bottom of the top cover, and the positioning protrusion is arranged inside the positioning hole and is interference connected therewith.

[0010] Preferably, at least one second heat dissipation hole is opened on the side of the base, and the second heat dissipation holes are distributed in a circular array with the center point of the base as the center.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] When the brushless DC motor needs to be disassembled, you only need to loosen the locking bolts to loosen the top cover and the outer shell. After removing the top cover, pull the outer shell upward to loosen the outer shell and the base. When reinstalling, insert the shaft core into the bearing, and set the stator sleeve on the outside of the shaft core. Use the base shaft hole and bearing to ensure the concentricity of the stator rotor and the rotor assembly, without using special tooling to adjust the concentricity of the stator assembly and the rotor assembly. Then place the outer shell on the base, and make the limit column re-interference connected with the limit hole, place the top cover on the outer shell, tighten the locking bolts to complete the reinstallation, and the disassembly steps are simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a brushless DC motor that is easy to disassemble according to the utility model;

[0014] Figure 2 This is an exploded view of a brushless DC motor that is easy to disassemble according to the utility model;

[0015] Figure 3 The utility model is a schematic structural diagram of a housing of a brushless DC motor which is easy to disassemble.

[0016] Numbers in the figure:

[0017] 1-positioning protrusion, 2-bolt hole, 3-limiting column, 4-housing, 5-stator chip, 7-first heat dissipation hole, 8-locking bolt, 9-second heat dissipation hole, 10-base, 11-stator, 12-top cover, 13-axis core. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-3As shown, the utility model provides a DC brushless motor that is easy to disassemble, including a top cover 12, a shell 4, a base 10, a stator 11 and a shaft core 13, wherein the stator 11 is arranged inside the shell 4, and a plurality of evenly distributed stator chips 5 are fixedly arranged on the inner wall of the shell 4, wherein the stator chips 5 are rectangular, and there is a gap between the stator 11 and the stator chips 5, wherein the top cover 12 is arranged at the upper end of the shell 4 and is detachably connected thereto, wherein the base 10 is arranged at the bottom of the shell 4 and is detachably connected thereto, wherein the base 10 is provided with an axial hole and a bearing for rotationally connecting with the shaft core 13, wherein at least one first heat dissipation hole 7 is provided on the side of the top cover 12, and the first heat dissipation holes 7 are distributed in a circular array with the center point of the top cover 12 as the center, and wherein at least one second heat dissipation hole 9 is provided on the side of the base 10, and the second heat dissipation holes 9 are distributed in a circular array with the center point of the base 10 as the center;

[0020] The top cover 12 is provided with at least one through hole at one end close to the outer shell 4, and the outer shell 4 is provided with at least one bolt hole 2 at one end close to the top cover 12. The top cover 12 is fastened to the outer shell 4 by a locking bolt 8. The base 10 is provided with at least one limiting hole, and the outer shell 4 is provided with at least one limiting column 3 integrally formed therewith at one end close to the base 10. The limiting column 3 is arranged inside the limiting hole and is interference connected therewith. The outer shell 4 is provided with at least one positioning protrusion 1 integrally formed therewith at one end close to the top cover 12. The bottom of the top cover 12 is provided with at least one positioning hole, and the positioning protrusion 1 is arranged inside the positioning hole and is interference connected therewith. The outer shell 4 and the base 10 are also fastened with bolts.

[0021] Compared with the traditional technology: when the DC brushless motor needs to be disassembled, it is only necessary to loosen the locking bolt 8 to loosen the top cover 12 and the outer shell 4. After removing the top cover 12, pull the outer shell 4 upward to loosen the outer shell 4 and the base 10. When reinstalling, insert the shaft core 13 into the bearing, and sleeve the stator 11 on the outside of the shaft core 13. The shaft hole and the bearing of the base 10 are used to ensure the concentricity of the stator 11 rotating part and the rotor assembly, without using a special tooling fixture to adjust the concentricity of the stator 11 assembly and the rotor assembly. Then, place the outer shell 4 on the base 10, and make the limit column 3 re-interferencely connected with the limit hole, place the top cover 12 on the outer shell 4, tighten the locking bolt 8 to complete the reinstallation, and the disassembly steps are simple and convenient.

[0022] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A brushless DC motor that is easy to disassemble, comprising a top cover, a housing, a base, a stator and a shaft core, wherein the stator is arranged inside the housing, and is characterized in that: The top cover is arranged at the upper end of the shell and is detachably connected thereto, the base is arranged at the bottom of the shell and is detachably connected thereto, and the base is provided with an axial hole and a bearing for rotationally connecting with the shaft core; The top cover is provided with at least one through hole at one end close to the outer shell, and the outer shell is provided with at least one bolt hole at one end close to the top cover. The top cover is fastened to the outer shell by a locking bolt. The base is provided with at least one limiting hole, and the outer shell is provided with at least one limiting column integrally formed therewith at one end close to the base. The limiting column is arranged inside the limiting hole and is interference connected therewith.

2. The conveniently disassembled brushless DC motor according to claim 1, characterized in that: At least one first heat dissipation hole is formed on the side of the top cover, and the first heat dissipation holes are distributed in a circular array with the center point of the top cover as the center.

3. The conveniently disassembled brushless DC motor according to claim 1, characterized in that: A plurality of evenly distributed stator chips are fixedly disposed on the inner wall of the shell, the stator chips are rectangular, and there is a gap between the stators and the stator chips.

4. The conveniently disassembled brushless DC motor according to claim 1, characterized in that: At least one positioning protrusion is formed integrally with the housing at one end close to the top cover, and at least one positioning hole is formed at the bottom of the top cover. The positioning protrusion is arranged inside the positioning hole and is interference-connected with the positioning hole.

5. The conveniently disassembled brushless DC motor according to claim 1, characterized in that: At least one second heat dissipation hole is formed on the side of the base, and the second heat dissipation holes are distributed in a circular array with the center point of the base as the center.

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