Brushless motor convenient to install

Abstract

The utility model relates to a brushless motor convenient to install in the field of brushless motors, which comprises a base, a circuit board and an outer rotor shell, a mounting shaft sleeve is formed at the top end of the base, a stator iron core is clamped on the outer surface of the mounting shaft sleeve, a winding is wound on the stator iron core, a rotating shaft is coaxially connected in the mounting shaft sleeve, and a cushion block is coaxially connected in the middle of the rotating shaft. An inserting buckle is formed at the joint of the mounting shaft sleeve and the base, a positioning block is formed on the surface, close to the mounting shaft sleeve, of the base, a positioning notch is formed in the circuit board, fixing lugs are arranged on the outer surface of the base in a surrounding mode, threaded holes are formed in the surfaces of the fixing lugs, and a plurality of positioning buckles are formed on the edge of the base. According to the utility model, the circuit board is connected with the buckle of the plug-in buckle, so that the circuit board can be quickly mounted and dismounted, the threaded holes on the base are conveniently mounted and fixed in a threaded connection manner, and the positioning buckle can further enhance the stability and reliability of the mounting of the base.

Description

Technical Field

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

[0002] Brushless motors, also known as electronically commutated motors, are motors that use electronic commutators instead of traditional mechanical commutators. They are widely used in power tools, electric vehicles, aircraft models, drones, household appliances and other fields due to their advantages such as high efficiency, long life, low noise and low maintenance cost.

[0003] The brushless motor is mainly composed of a stator, a rotor, an electronic commutator and a power supply. The stator is fixed and has a coil wound on it. The rotor is composed of permanent magnets and can rotate freely. It is controlled by a circuit board that is mounted on the shaft and electrically connected to the stator winding. The electronic commutator is responsible for automatically switching the direction of the current according to the position of the rotor, thereby achieving continuous rotation of the rotor.

[0004] However, in actual applications, the installation and maintenance process of brushless motors is often relatively complicated, which is mainly due to the precise structure and high performance requirements of brushless motors. Due to the complexity of the motor structure and the limitations of the installation method, existing brushless motors are generally provided with an upper end cover and a lower end cover, so that its various components are installed on the lower end cover, and the circuit board is installed on the lower end cover by bolts, which leads to difficulties in maintenance or replacement of components, which is not conducive to the rapid assembly and disassembly of the brushless motor, increases the efficiency and cost of installation and maintenance, and the existing brushless motors only have mounting holes on the surface of the end cover for connection with external equipment or mechanisms, resulting in poor connection and installation stability of the brushless motor, thereby affecting the stable operation of the brushless motor. Utility Model Content

[0005] The purpose of the utility model is to solve the above defects and provide a brushless motor that is easy to install, so as to solve the technical problem that the installation and connection of the brushless motor in the above background technology is relatively cumbersome, which is not conducive to the rapid installation and disassembly of the brushless motor, thereby affecting the installation efficiency and production cost.

[0006] The purpose of the utility model is achieved by the following methods:

[0007] A brushless motor which is easy to install comprises a base, a circuit board and an outer rotor housing, a mounting sleeve is formed on the top of the base, a stator core is clamped on the outer surface of the mounting sleeve, a plurality of windings are arranged around the stator core, a rotating shaft is coaxially connected inside the mounting sleeve, a cushion block is coaxially connected to the middle of the rotating shaft, a plurality of clamping protrusions are formed on the outer surface of the mounting sleeve, a clamping groove matching the clamping protrusions is provided in the middle of the stator core, a plurality of buckles are formed at the connection between the mounting sleeve and the base, the circuit board is buckled with the buckle through a connecting hole, a positioning block is formed on the surface of the base close to the mounting sleeve, a positioning notch matching the positioning block is provided on the circuit board, a plurality of fixing ears are arranged around the outer surface of the base, threaded holes are provided on the surfaces of the fixing ears, and a plurality of positioning buckles are formed on the edge of the base.

[0008] Further in the above description, the snap-in protrusions are distributed around the outer surface of the mounting sleeve, the stator core is coaxially connected to the mounting sleeve, and the stator core is snap-fitted with the snap-in grooves and the snap-in protrusions, and a plurality of connection ends for connecting windings are arranged around the outer surface of the stator core, and the snap-in protrusions are snap-fitted with the snap-in grooves in the stator core to complete the installation connection of the stator core.

[0009] Further in the above description, a first bearing is sleeved in the mounting sleeve, a second bearing is sleeved in the base, the rotating shaft passes through the first bearing and the second bearing in sequence, and both are coaxially connected to the first bearing and the second bearing, making it convenient to connect the first bearing and the second bearing.

[0010] In the above description, the inner wall of the outer rotor housing is sleeved with a permanent magnet pole, and the inner wall of the permanent magnet pole is in contact with the outer side surface of the stator core.

[0011] Further in the above description, the circular array of positioning buckles is distributed on the edge of the base, the surface of the positioning buckles is higher than the surface of the fixing ears, and the surface of the positioning buckles forms a convex portion away from the surface of the fixing ears, so that the convex portion formed by the positioning buckles and the surfaces of the fixing ears can play a positioning clamping role when connected to an external fixed position, thereby improving the stability and reliability of the connection between the base and the fixed position.

[0012] Further in the above description, the buckles are distributed around the connection between the mounting sleeve and the base, and the outer surface of the buckles contacts the inner wall of the connecting hole. The provided buckles are convenient for connecting the circuit board, thereby improving the installation and connection efficiency between the circuit board and the mounting sleeve.

[0013] Further in the above description, a mounting portion connected to the rotating shaft is formed in the middle of the outer rotor housing, a mounting flange is provided on the surface of the outer rotor housing, and a plurality of mounting holes are opened on the mounting flange. The provided mounting flange can be matched and connected with the corresponding mounting position of the brushless motor to improve the adaptability of the connection.

[0014] The beneficial effects of the utility model are as follows: the stator core can be conveniently connected and disassembled with the mounting sleeve through the snap-fitting protrusion and the snap-fitting groove, and the snap-fitting protrusion and the snap-fitting groove fix the stator core on the mounting sleeve, thereby improving the stability and reliability of the connection; the fixing ears and threaded holes arranged on the base enable the brushless motor to be conveniently fixed on the equipment or mechanism by threaded connection, thereby improving the applicability and flexibility of the brushless motor; the positioning buckles on the surface of the base can further enhance the installation stability of the base and the external equipment or structure, so that the base can remain stable when subjected to load or external force, thereby ensuring the normal operation of the motor; in addition, the circuit board is snap-fitted to the plug buckle through the connecting hole, and the positioning block on the surface of the base is matched with the positioning notch of the circuit board, so that the circuit board can be quickly installed and disassembled; and this design greatly simplifies the installation and maintenance process of the brushless motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram from a top view of the present embodiment;

[0016] Figure 2 This is a three-dimensional diagram of the present embodiment from a bottom-up perspective;

[0017] Figure 3 Schematic diagram of the structure of the outer rotor housing in this embodiment;

[0018] Figure 4 is a cross-sectional view of this embodiment;

[0019] Figure 5 This is a schematic diagram of the connection between the shaft sleeve and the stator core in this embodiment;

[0020] Figure 6 This is a schematic diagram of the structure of installing the shaft sleeve in this embodiment;

[0021] The reference numerals in the figure are: 1-base, 2-circuit board, 3-outer rotor housing, 4-mounting sleeve, 5-stator core, 6-winding, 7-rotating shaft, 8-pad, 9-clamping protrusion, 10-clamping groove, 11-buckle, 12-connecting hole, 13-positioning block, 14-positioning notch, 15-fixing ear, 16-threaded hole, 17-positioning buckle, 18-first bearing, 19-second bearing, 20-permanent magnet pole, 21-mounting part, 22-mounting flange, 23-mounting hole. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] In this embodiment, refer to Figure 1-Figure 6The brushless motor which is easy to install is specifically implemented, and comprises a base 1, a circuit board 2 and an outer rotor housing 3. A mounting sleeve 4 is formed at the top of the base 1. A stator core 5 is clamped on the outer surface of the mounting sleeve 4. A winding 6 is arranged around the stator core 5. A rotating shaft 7 is coaxially connected in the mounting sleeve 4. A cushion block 8 is coaxially connected to the middle of the rotating shaft 7. Three clamping protrusions 9 are formed on the outer surface of the mounting sleeve 4. A clamping groove 10 matching the clamping protrusion 9 is provided in the middle of the stator core 5. Three plug buckles 11 are formed at the connection between the mounting sleeve 4 and the base 1. The circuit board 2 is buckled with the plug buckle 11 through a connecting hole 12. A positioning block 13 is formed on the surface of the base 1 close to the mounting sleeve 4. A positioning notch 14 matching the positioning block 13 is provided on the circuit board 2. Three fixing ears 15 are arranged around the outer surface of the base 1. Threaded holes 16 are provided on the surfaces of the fixing ears 15. Three positioning buckles 17 are formed on the edge of the base 1.

[0024] The clamping protrusions 9 are distributed around the outer surface of the mounting sleeve 4, the stator core 5 is coaxially connected to the mounting sleeve 4, and the stator core 5 is clamped with the clamping protrusions 9 through the clamping grooves 10. The outer surface of the stator core 5 is provided with a connection end for connecting the winding 6. The provided clamping protrusions 9 are clamped and matched with the clamping grooves 10 in the stator core 5, so that the installation connection of the stator core 5 can be completed.

[0025] The first bearing 18 is sleeved in the mounting sleeve 4, the second bearing 19 is sleeved in the base 1, the rotating shaft 7 passes through the first bearing 18 and the second bearing 19 in sequence, and is coaxially connected with the first bearing 18 and the second bearing 19, so that it is convenient to connect the first bearing 18 and the second bearing 19. The inner wall of the outer rotor housing 3 is sleeved with a permanent magnet pole 20, and the inner wall of the permanent magnet pole 20 is in contact with the outer side surface of the stator core 5.

[0026] The positioning clips 17 are distributed in a circular array on the edge of the base 1, and the surface of the positioning clips 17 is higher than the surface of the fixing ears 15, and the surface of the positioning clips 17 is away from the surface of the fixing ears 15 to form a convex portion, so that the convex portion formed by the positioning clips 17 and the surfaces of the fixing ears 15 can play a positioning and clamping role when connected to an external fixed position, thereby improving the stability and reliability of the connection between the base 1 and the fixed position.

[0027] The buckles 11 are distributed around the connection between the mounting sleeve 4 and the base 1, and the outer surface of the buckles 11 contacts the inner wall of the connecting hole 12. The buckles 11 are convenient for connecting the circuit board 2, thereby improving the installation and connection efficiency between the circuit board 2 and the mounting sleeve 4.

[0028] A mounting portion 21 connected to the rotating shaft 7 is formed in the middle of the outer rotor housing 3, and a mounting flange 22 is provided on the surface of the outer rotor housing 3. Four mounting holes 23 are opened on the mounting flange 22. The mounting flange 22 can be matched and connected with the corresponding mounting position of the brushless motor to improve the adaptability of the connection.

[0029] The specific installation process in this embodiment is as follows: the installation sleeve 4 is integrally formed with the base 1, the cushion block 8 is installed in the installation sleeve 4, and the first bearing 18 and the second bearing 19 are respectively nested and connected with the ends of the installation sleeve 4 and the base 1, and the rotating shaft 7 is connected, and the installation sleeve 4 is passed through the connecting hole 12 of the circuit board 2, so that its three buckles 11 are in contact with the inner wall of the connecting hole 12 to play a role in clamping and fixing, and the positioning block 13 on the surface of the base 1 is matched with the positioning notch 14 on the circuit board 2, so that the circuit board 2 can be clamped and fixed, thereby improving the installation efficiency of the circuit board 2, so that the circuit board 2 can be quickly installed and removed. This design greatly simplifies the installation and maintenance process of the brushless motor, and the winding 6 is wound on the connecting end of the stator core 5, and the stator core 5 is connected to the installation shaft. One end of the sleeve 4 is sleeved, so that the corresponding clamping of the three clamping protrusions 9 and the three clamping grooves 10 fixes the stator core 5 on the mounting sleeve 4, so that the stator core 5 can be easily sleeved and disassembled with the mounting sleeve 4, thereby improving the stability and reliability of the connection. The inner wall of the outer rotor housing 3 is connected to the permanent magnet pole 20, and is connected to the rotating shaft 7 through the mounting portion 21. The fixing ears 15 and threaded holes 16 provided on the base 1 enable the brushless motor to be fixed to the corresponding equipment or mechanism by threaded connection, thereby improving the applicability and flexibility of the brushless motor. The positioning buckle 17 on the surface of the base 1 can further enhance the installation stability of the base 1 and the external equipment or structure, so that the base 1 can remain stable when subjected to load or external force, thereby ensuring the normal operation of the motor.

[0030] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A brushless motor that is easy to install, comprising a base, a circuit board and an outer rotor housing, a mounting sleeve is formed at the top of the base, a stator core is clamped on the outer surface of the mounting sleeve, a plurality of windings are arranged around the stator core, a rotating shaft is coaxially connected inside the mounting sleeve, a cushion block is coaxially connected to the middle of the rotating shaft, and the characteristics are: A plurality of snap-in protrusions are formed on the outer surface of the mounting sleeve, a snap-in groove matching the snap-in protrusions is provided in the middle of the stator core, a plurality of buckles are formed at the connection between the mounting sleeve and the base, the circuit board is snap-connected with the buckles through connecting holes, a positioning block is formed on the surface of the base close to the mounting sleeve, a positioning notch matching the positioning block is provided on the circuit board, a plurality of fixing ears are arranged around the outer surface of the base, threaded holes are provided on the surfaces of the fixing ears, and a plurality of positioning buckles are formed on the edge of the base.

2. The brushless motor that is easy to install according to claim 1, characterized in that: The clamping protrusions are distributed around the outer surface of the mounting sleeve, the stator core is coaxially connected to the mounting sleeve, and the stator core is matched with the clamping protrusions through the clamping grooves, and a plurality of connection ends for connecting windings are arranged around the outer surface of the stator core.

3. The brushless motor that is easy to install according to claim 1, characterized in that: The installation sleeve is sleeved with a first bearing, the base is sleeved with a second bearing, the rotating shaft passes through the first bearing and the second bearing in sequence, and is coaxially connected to the first bearing and the second bearing.

4. The brushless motor that is easy to install according to claim 1, characterized in that: The inner wall of the outer rotor housing is sleeved with a permanent magnet pole, and the inner wall of the permanent magnet pole is in contact with the outer side surface of the stator core.

5. The brushless motor that is easy to install according to any one of claims 1 to 4, characterized in that: The positioning buckles are distributed in a circular array on the edge of the base, the surface of the positioning buckles is higher than the surface of the fixing ears, and the surface of the positioning buckles is away from the surface of the fixing ears to form a convex portion.

6. The brushless motor that is easy to install according to any one of claims 1 to 4, characterized in that: The buckles are distributed around the connection between the mounting sleeve and the base, and the outer surface of the buckles contacts the inner wall of the connection hole.

7. The brushless motor that is easy to install according to any one of claims 1 to 4, characterized in that: A mounting portion connected to the rotating shaft is formed in the middle of the outer rotor housing, a mounting flange is provided on the surface of the outer rotor housing, and a plurality of mounting holes are opened on the mounting flange.

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