An automated assembly method for a micro motor and a micro motor produced by assembling the same

Abstract

The present invention relates to the field of micro-motor assembly technology, and in particular to an automated assembly method for micro-motors and the micro-motors assembled and produced by the same, which include a housing, a protective cover, a stator frame, a rotor, a rotating shaft, a front cover and a rear cover, wherein the stator frame is hollow, and a coil is wound around the outer peripheral wall of the stator frame; the rear cover is provided with a rear positioning pin, and the rear end of the stator frame is provided with a rear positioning hole, and the rear positioning pin is plugged into the rear positioning hole; the front cover is provided with a front positioning pin, and the stator frame is provided with a front positioning hole, and the front positioning pin is plugged into the front positioning hole. The present invention does not require the operation of locking screws, and the assembly process is quick and convenient. The screw components are omitted, and the assembly process is simplified, which is conducive to improving production efficiency, increasing production capacity, and reducing labor costs; it avoids abnormal noise caused by loose screws, and also avoids problems with the micro-motor caused by loose screws, which is conducive to improving the service life of the micro-motor.

Description

Technical Field

[0001] The present invention relates to the technical field of micro motor assembly, and in particular to an automated assembly method for a micro motor and a micro motor produced by the assembly. Background Art

[0002] In the field of micro motor technology, micro motors are core components in various precision electronic equipment and automation systems, and the stability and reliability of their performance are crucial. Micro motors are usually composed of multiple precision components, including rotors, stators, bearings, housings, etc., and the tight connection of these components mostly relies on screw fixation. However, due to the continuous vibration generated by micro motors during operation, traditional screw fixation methods face challenges, especially when the motor is at high speed or under long-term workload, the screws are prone to gradually loosen due to vibration, which will not only lead to a decrease in motor efficiency and abnormal noise, but in severe cases may also cause equipment failure, affecting the service life and safety performance of the product.

[0003] To solve this problem, the industry has explored a variety of technical means, such as anti-loosening screws, pre-set plastic washers, thread locking adhesives, etc. to enhance the stability of screw connections. Anti-loosening screws resist loosening caused by vibration through special thread design or the addition of elastic elements; pre-set plastic washers can undergo plastic deformation during the screw tightening process, forming additional friction to prevent the screw from loosening; and thread locking adhesives fill the thread gaps after curing through chemical action, effectively preventing the screws from loosening in a vibrating environment. Although these technologies have alleviated the problem of screw loosening to a certain extent, they either increase manufacturing costs or place higher requirements on the assembly process, and may still fail under extreme conditions or after long-term use.

[0004] Therefore, developing an innovative micromotor structural design and assembly method to fundamentally improve the ability of various components of the micromotor to remain tight in a high-frequency vibration environment and reduce or even eliminate the various disadvantages caused by loose screws has become a technical problem that needs to be urgently solved in the current field of micromotor technology. Summary of the invention

[0005] In view of the problems of the prior art, the present invention provides an automated assembly method for a micro motor and a micro motor produced by the assembly. The method has an ingenious design, no screw locking operation is required, the assembly process is quick and convenient, the screw components are omitted, the assembly process is simplified, the structure is simple, and it is beneficial to improve production efficiency, simplify the production process, increase production capacity, and reduce labor costs; further, the micro motor of the present application does not have a screw component, thereby avoiding abnormal noise caused by loose screws, and also avoiding problems in the operation of the micro motor caused by loose screws, which is beneficial to improving the service life of the micro motor.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides an automated assembly method for a micro motor, comprising the following steps: step S1, loading a rear shaft sleeve and a rear end cover, and arranging the rear shaft sleeve in a rear middle shaft hole of the rear end cover;

[0008] Step S2, heating and hot-melting the rear positioning pins on both sides of one end surface of the rear end cover to a preset temperature;

[0009] Step S3, loading the stator frame, assembling the rear end cover on the rear end opening of the stator frame with the coil, and inserting the rear positioning pins of the rear end cover into the rear positioning holes on both sides of the inner wall of the stator frame;

[0010] Step S4, loading the rotating shaft integrally formed with the rotor, and inserting the rear end of the rotating shaft integrally formed with the rotor from the inner front end of the stator frame into the rear shaft sleeve of the rear end cover;

[0011] Step S5, loading the front shaft sleeve and the front end cover, and installing the front shaft sleeve in the front middle shaft hole of the front end cover;

[0012] Step S6, aligning the front sleeve of the front end cover with the front end of the rotating shaft, driving the front end cover to move, so that the front end of the rotating shaft passes through the front sleeve of the front end cover;

[0013] Step S7, heating and hot-melting the front positioning pins on both sides of one end surface of the front end cover to a preset temperature;

[0014] Step S8, assembling the front end cover at the front end opening of the stator frame, and inserting the front positioning pins of the front end cover into the front positioning holes on both sides of the inner wall of the stator frame;

[0015] Step S9, loading the housing, assembling the stator frame with the coil into the housing from the front opening of the housing;

[0016] Step S10, loading the protective cover, assembling the protective cover to the front end opening of the shell to close the front end opening of the shell, the protective cover is provided with an outer central axis hole for the front end of the rotating shaft to pass through.

[0017] Among them, abutment blocks are extended on both sides of the outer wall of the stator frame, the outer shell is provided with a cavity, support platforms are provided on both sides of the inner wall of the cavity, the abutment blocks are located above the support platforms, and at least one stator positioning column is provided at the lower end of the abutment block, and at least one stator positioning hole is provided on the support platform, and the stator positioning column and the stator positioning hole are arranged in a one-to-one correspondence; in the step S9, when the stator frame with the coil is assembled from the front end opening of the outer shell to the cavity of the outer shell, the stator positioning column is inserted into the stator positioning hole.

[0018] Wherein, the upper end surface of the support platform and the lower end surface of the abutment block are in horizontal abutment with each other.

[0019] Before the stator positioning column is inserted into the stator positioning hole, the stator positioning column is first heated and hot-melted to a preset temperature.

[0020] Among them, support blocks are respectively provided on the other two sides of the inner wall of the cavity, and a protective cover insertion hole is provided on the support block, and protective cover positioning columns are respectively provided on the two sides of the lower end of the protective cover; in the step S10, when the protective cover is assembled to the front end opening of the shell, the protective cover positioning columns are first heated and hot-melted to a preset temperature, and then the protective cover positioning columns are inserted into the protective cover insertion holes until the protective cover closes the front end opening of the shell.

[0021] The present invention also provides a micro motor, which includes a housing, a protective cover, a stator frame, a rotor, a rotating shaft, a front end cover and a rear end cover, wherein the stator frame is hollow, and a coil is wound around the outer peripheral wall of the stator frame; the stator frame is installed in the housing, the front end opening of the housing is installed with the protective cover, and the center of the protective cover is provided with an outer middle axis hole; the center of the front end cover is provided with a front middle axis hole, and a front shaft sleeve is installed in the front middle axis hole; the center of the rear end cover is provided with a rear middle axis hole, and a rear shaft sleeve is installed in the rear middle axis hole; the rotating shaft and the rotor are integrally formed;

[0022] The rear end cover is provided with rear positioning pins on both sides of an end surface close to the rear end of the stator frame, and the inner wall of the rear end of the stator frame is provided with rear positioning holes on both sides, and the rear positioning pins are inserted into the rear positioning holes. The rear end cover is used to cover the rear end opening of the stator frame;

[0023] The rotor is movably mounted in the stator frame, and the rear end of the rotating shaft is slidably inserted into the rear shaft sleeve;

[0024] Front positioning plugs are respectively arranged on both sides of an end surface of the front end cover close to the front end of the stator frame, and front positioning holes are respectively arranged on both sides of the inner wall of the front end of the stator frame. The front positioning plugs are inserted into the front positioning holes, and the front end cover is used to cover the front end opening of the stator frame;

[0025] The front end of the rotating shaft is slidably inserted into the front shaft sleeve and the outer middle shaft hole.

[0026] Wherein, abutment blocks are extended on both sides of the stator frame, the shell is provided with a cavity, support platforms are provided on both sides of the inner wall of the cavity, the abutment block is located above the support platform, and at least one stator positioning column is provided at the lower end of the abutment block, and at least one stator positioning hole is provided on the support platform, and the stator positioning column and the stator positioning hole are arranged in a one-to-one correspondence; when the stator frame with the coil is assembled from the front end opening of the shell to the cavity of the shell, the stator positioning column is inserted into the stator positioning hole; the upper end surface of the support platform and the lower end surface of the abutment block are matched and abutted horizontally.

[0027] Wherein, end cover support bodies are respectively arranged on both sides of the inner wall of the stator frame, a rear end installation groove is formed between the rear end of the end cover support body and the inner wall of the stator frame, the rear positioning plug hole is arranged at the rear end of the end cover support body, and the rear end cover is installed in the rear end installation groove;

[0028] A front end mounting groove is formed between the front end of the end cover support body and the inner wall of the stator frame, the front positioning socket is arranged at the front end of the end cover support body, and the front end cover is installed in the front end mounting groove.

[0029] Among them, support blocks are respectively provided on the other two sides of the inner wall of the cavity, and a protective cover insertion hole is provided on the support block, and protective cover positioning columns are respectively provided on the two sides of the lower end of the protective cover; when the protective cover is assembled to the front end opening of the shell, the protective cover positioning columns are inserted into the protective cover insertion holes until the protective cover closes the front end opening of the shell; a protective cover receiving groove is formed between the front end of the support block and the inner wall of the cavity, and the protective cover is accommodated in the protective cover receiving groove.

[0030] Wherein, a ball is rotatably arranged at the rear end of the rotating shaft, and the ball is slidably abutted against the bottom of the inner wall of the shell.

[0031] Beneficial effects of the present invention:

[0032] The present invention is cleverly designed, does not require screw locking operations, and the assembly process is quick and convenient. The screw components are omitted, the assembly process is simplified, and the structure is simple, which is conducive to improving production efficiency, simplifying production processes, increasing production capacity, and reducing labor costs. Furthermore, the micromotor of the present application does not have a screw component, which avoids abnormal noise caused by loose screws. At the same time, it also avoids problems with the micromotor caused by loose screws, which is conducive to improving the service life of the micromotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flow chart of an automated assembly method for a micro motor in Example 1 of the present invention.

[0034] Figure 2This is a structural cross-sectional view of a micro motor in Example 2 of the present invention.

[0035] Figure 3 This is a structural exploded view of a micro motor in Example 2 of the present invention.

[0036] exist Figures 1 to 3 Reference numerals in the drawings include:

[0037] 1. Shell; 2. Protective cover; 3. Stator frame; 4. Rotor; 5. Rotating shaft; 6. Front cover; 7. Rear cover; 8. Coil; 9. Outer center axis hole; 10. Front center axis hole; 11. Front bushing; 12. Rear center axis hole; 13. Rear bushing; 14. Rear positioning pin; 15. Rear positioning socket; 16. Front positioning pin; 17. Front positioning socket; 18. Abutment block; 19. Cavity; 20. Support platform; 21. Stator positioning pin; 22. Stator positioning hole; 23. End cover support body; 24. Front end mounting groove; 25. Support block; 26. Protective cover socket; 27. Protective cover positioning pin; 28. Ball; 29. ​​Protective cover groove. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0039] Example 1

[0040] Embodiment 1 of the present application provides an automated assembly method for a micro motor, which comprises the following steps:

[0041] Step S1, loading the rear sleeve 13 and the rear end cover 7, and installing the rear sleeve 13 in the rear middle shaft hole 12 of the rear end cover 7;

[0042] Step S2, heating and hot-melting the rear positioning pins 14 on both sides of one end surface of the rear end cover 7 to a preset hot-melt temperature;

[0043] Step S3, loading the stator frame 3, assembling the rear end cover 7 at the rear end opening of the stator frame 3 with the coil 8, and inserting the rear positioning pins 14 of the rear end cover 7 into the rear positioning holes 15 on both sides of the inner wall of the stator frame 3;

[0044] Step S4, loading the rotating shaft 5 integrally formed with the rotor 4, and inserting the rear end of the rotating shaft 5 integrally formed with the rotor 4 from the front end inside the stator frame 3 into the rear sleeve 13 of the rear end cover 7;

[0045] Step S5, loading the front shaft sleeve 11 and the front end cover 6, and installing the front shaft sleeve 11 in the front center shaft hole 10 of the front end cover 6;

[0046] Step S6, aligning the front sleeve 11 of the front cover 6 with the front end of the rotating shaft 5, driving the front cover 6 to move, so that the front end of the rotating shaft 5 passes through the front sleeve 11 of the front cover 6;

[0047] Step S7, heating and hot-melting the front positioning pins 16 on both sides of one end surface of the front end cover 6 to a preset hot-melt temperature;

[0048] Step S8, assembling the front end cover 6 at the front end opening of the stator frame 3, and inserting the front positioning pins 16 of the front end cover 6 into the front positioning holes 17 on both sides of the inner wall of the stator frame 3;

[0049] Step S9, loading the housing 1, assembling the stator frame 3 with the coil 8 into the housing 1 from the front end opening of the housing 1;

[0050] Step S10, loading the protective cover 2, assembling the protective cover 2 to the front end opening of the shell 1 to close the front end opening of the shell 1, and the protective cover 2 is provided with an outer central axis hole 9 for the front end of the rotating shaft 5 to pass through.

[0051] Specifically, the embodiment of the present application is cleverly designed and the assembly process is simplified. When assembling the embodiment of the present application, first load the rear shaft sleeve 13 and the rear end cover 7, and install the rear shaft sleeve 13 in the rear center shaft hole 12 of the rear end cover 7; heat and hot-melt the rear positioning pins 14 on both sides of one end face of the rear end cover 7 to a preset temperature, load the stator frame 3, and assemble the rear end cover 7 in the rear end opening of the stator frame 3 with the coil 8, wherein the heated and hot-melted rear positioning pins 14 are inserted into the rear positioning holes 15 on both sides of the inner wall of the stator frame 3. During the process, the rear positioning pin 14 after heating and hot melting is inserted into the rear positioning socket 15. After cooling, the rear positioning pin 14 after heating and hot melting is welded in the rear positioning socket 15, and the rear end cover 7 is stably connected with the stator frame 3 and is not easy to loosen; then the rotating shaft 5 integrally formed with the rotor 4 is loaded, and the rear end of the rotating shaft 5 integrally formed with the rotor 4 is inserted from the inner front end of the stator frame 3 into the rear shaft sleeve 13 of the rear end cover 7, and the rotating shaft 5 is movably arranged in the rear shaft sleeve 13 to realize the rear end positioning of the rotating shaft 5; then the front shaft sleeve 11 and the front end are loaded The front cover 6 is assembled into the front opening of the stator frame 3, and the front positioning pins 16 after hot melting are inserted into the front positioning holes 17 on both sides of the inner wall of the stator frame 3. In the process, the front positioning pin 16 is inserted into the front positioning hole 17 after being heated and melted. After cooling, the front positioning pin 16 is melted in the front positioning hole 17, and the front end cover 6 is stably connected to the stator frame 3 and is not easy to loosen; then the outer shell 1 is loaded, and the stator frame 3 with the coil 8 is assembled into the outer shell 1 from the front end opening of the outer shell 1; the protective cover 2 is loaded, and the protective cover 2 is assembled to the front end opening of the outer shell 1 to close the front end opening of the outer shell 1. The protective cover 2 is provided with an outer central axis hole 9 for the front end of the rotating shaft 5 to pass through.

[0052] In the embodiment of the present application, abutment blocks 18 are extended on both sides of the outer wall of the stator frame 3, the outer shell 1 is provided with a cavity 19, and support platforms 20 are provided on both sides of the inner wall of the cavity 19. The abutment blocks 18 are located above the support platforms 20, and at least one stator positioning column 21 is provided at the lower end of the abutment block 18. At least one stator positioning hole 22 is provided on the support platform 20, and the stator positioning column 21 and the stator positioning hole 22 are arranged one by one; in step S9, when the stator frame 3 with the coil 8 is assembled from the front end opening of the outer shell 1 to the cavity 19 of the outer shell 1, the stator positioning column 21 is inserted into the stator positioning hole 22, and before the stator positioning column 21 is inserted into the stator positioning hole 22, the stator positioning column 21 is first heated and hot-melted to a preset hot-melt temperature. Specifically, under the above setting, in the process of assembling the stator frame 3 into the outer shell 1, the initial positioning is first performed by abutting the abutment block 18 with the support platform 20. In the process, the stator positioning column 21 is hot-melted and then inserted into the stator positioning hole 22. After cooling, the stator positioning column 21 is fused into the stator positioning hole 22. The structure is strong in stability, so that the stator frame 3 can be firmly installed in the outer shell 1 and is not easy to loosen.

[0053] In the embodiment of the present application, support blocks 25 are respectively provided on the other two sides of the inner wall of the cavity 19, and a protective cover insertion hole 26 is provided on the support blocks 25, and protective cover positioning columns 27 are respectively provided on the two sides of the lower end of the protective cover 2; in step S10, when the protective cover 2 is assembled to the front opening of the shell 1, the protective cover positioning columns 27 are first heated and hot-melted to a preset hot-melt temperature, and then the protective cover positioning columns 27 are inserted into the protective cover insertion holes 26 until the protective cover 2 closes the front opening of the shell 1. Specifically, under the above-mentioned setting, when the protective cover 2 is assembled to the front opening of the shell 1, the protective cover positioning columns 27 of the protective cover 2 are first hot-melted and then inserted into the protective cover insertion holes 26. After cooling, the protective cover positioning columns 27 are fused in the protective cover insertion holes 26, and the structural stability is strong, so that the protective cover 2 can be firmly installed on the shell 1 and is not easy to loosen.

[0054] According to the assembly method in the embodiment of the present application, there is no need to perform screw locking operations during the assembly process, and the assembly process is quick and convenient. The screw components are omitted, and the assembly process is simplified, which is beneficial to improving production efficiency, simplifying production processes, increasing production capacity, and reducing labor costs. Furthermore, the micro motor assembled by this method does not have screw components, thereby avoiding abnormal noise caused by loose screws, and also avoiding problems with the operation of the micro motor caused by loose screws, which is beneficial to improving the service life of the micro motor.

[0055] In the embodiments of the present application, during the assembly process between the front end cover 6, the rear end cover 7, the rotating shaft 5 and the stator frame 3, and the assembly process between the stator frame 3, the protective cover 2 and the outer shell 1, the front positioning pin 16, the front positioning socket 17, the rear positioning pin 14, the rear positioning socket 15, the stator positioning pin 21, the stator positioning hole 22, the protective cover positioning pin 27 and the protective cover socket 26 can be positioned by a CCD visual detector, wherein a plurality of CCD visual detectors can be provided for adaptive configuration.

[0056] In the embodiment of the present application, the upper end surface of the support platform 20 is horizontally abutted with the lower end surface of the abutment block 18. Specifically, under the above configuration, the contact between the support platform 20 and the abutment block 18 is smooth, the support is better, and the positioning of the stator frame 3 is more stable and accurate.

[0057] Example 2

[0058] Embodiment 2 of the present application provides a micro motor, which includes a housing 1, a protective cover 2, a stator frame 3, a rotor 4, a rotating shaft 5, a front end cover 6 and a rear end cover 7. The stator frame 3 is hollow, and a coil 8 is wound around the outer peripheral wall of the stator frame 3; the stator frame 3 is installed in the housing 1, and the front end opening of the housing 1 is equipped with a protective cover 2, and an outer center axis hole 9 is opened at the center of the protective cover 2; a front center axis hole 10 is opened at the center of the front end cover 6, and a front shaft sleeve 11 is installed in the front center axis hole 10; a rear center axis hole 12 is opened at the center of the rear end cover 7, and a rear shaft sleeve 13 is installed in the rear center axis hole 12; the rotating shaft 5 and the rotor 4 are integrally formed; the two sides of the end surface of the rear end cover 7 close to the rear end of the stator frame 3 are respectively A rear positioning pin 14 is provided, and rear positioning holes 15 are respectively provided on both sides of the inner wall at the rear end of the stator frame 3. The rear positioning pin 14 is inserted into the rear positioning hole 15, and the rear end cover 7 is used to cover the rear end opening of the stator frame 3; the rotor 4 is movably installed in the stator frame 3, and the rear end of the rotating shaft 5 is slidably inserted into the rear shaft sleeve 13; the front end cover 6 is close to the front end of the stator frame 3. Front positioning pins 16 are respectively provided on both sides of an end surface of the front end of the stator frame 3, and front positioning holes 17 are respectively provided on both sides of the inner wall at the front end of the stator frame 3. The front positioning pin 16 is inserted into the front positioning hole 17, and the front end cover 6 is used to cover the front end opening of the stator frame 3; the front end of the rotating shaft 5 is slidably inserted into the front shaft sleeve 11 and the outer center axis hole 9.

[0059] Specifically, the micromotor of the embodiment of the present application has a novel structure and an ingenious design. During assembly, the rear end cover 7 is inserted into the rear positioning hole 15 through the rear positioning plug column 14, and the rear end cover 7 covers the rear end opening of the stator frame 3 to realize the assembly of the rear end cover 7. Then, the rotor 4 is assembled in the stator frame 3, and the rear end of the rotating shaft 5 is slidably inserted into the rear shaft sleeve 13. Then, the front end cover 6 is assembled to the front end opening of the stator frame 3, and the front end of the rotating shaft 5 is slidably inserted into the front shaft sleeve 11. The front end cover 6 is used to cover the front end opening of the stator frame 3; then, the stator frame 3 is assembled outside. The protective cover 2 is assembled on the front end opening of the outer shell 1; the front end of the rotating shaft 5 is slidably penetrated into the outer central axis; the embodiment of the present application does not need to perform the screw locking operation, the assembly process is quick and convenient, the screw components are omitted, the assembly process is simplified, the structure is simple, and it is beneficial to improve production efficiency, simplify production processes, increase production capacity, and reduce labor costs; further, the micro motor of the present application does not have a screw component, which avoids abnormal noise caused by loose screws, and also avoids problems with the micro motor caused by loose screws, which is beneficial to improving the service life of the micro motor.

[0060] In the embodiment of the present application, abutment blocks 18 are extended on both sides of the stator frame 3, a cavity 19 is provided on the shell 1, and support platforms 20 are provided on both sides of the inner wall of the cavity 19. The abutment blocks 18 are located above the support platforms 20, and at least one stator positioning column 21 is provided at the lower end of the abutment blocks 18. At least one stator positioning hole 22 is provided on the support platform 20, and the stator positioning column 21 is arranged in a one-to-one correspondence with the stator positioning hole 22; when the stator frame 3 with the coil 8 is assembled from the front end opening of the shell 1 to the cavity 19 of the shell 1, the stator positioning column 21 is inserted into the stator positioning hole 22; the upper end surface of the support platform 20 and the lower end surface of the abutment block 18 are matched and abutted horizontally. Specifically, under the above setting, the abutment block 18 abuts against the upper end surface of the support platform 20, and the stator positioning column 21 is inserted into the stator positioning hole 22, so as to realize the precise installation of the stator frame 3.

[0061] In the embodiment of the present application, end cap supports 23 are respectively provided on both sides of the inner wall of the stator frame 3, a rear end installation groove is formed between the rear end of the end cap support 23 and the inner wall of the stator frame 3, a rear positioning plug hole 15 is provided at the rear end of the end cap support 23, and the rear end cap 7 is installed in the rear end installation groove; a front end installation groove 24 is formed between the front end of the end cap support 23 and the inner wall of the stator frame 3, a front positioning plug hole 17 is provided at the front end of the end cap support 23, and the front end cap 6 is installed in the front end installation groove 24. Specifically, under the above arrangement, the rear end cap 7 and the front end cap 6 are accurately assembled and stored, and the rear end cap 7 and the front end cap 6 can be prevented from protruding.

[0062] In the embodiment of the present application, support blocks 25 are respectively provided on the other two sides of the inner wall of the cavity 19, and a protective cover insertion hole 26 is provided on the support block 25. Protective cover positioning columns 27 are respectively provided on the two sides of the lower end of the protective cover 2; when the protective cover 2 is assembled to the front end opening of the shell 1, the protective cover positioning columns 27 are inserted into the protective cover insertion holes 26 until the protective cover 2 closes the front end opening of the shell 1; a protective cover receiving groove 29 is formed between the front end of the support block 25 and the inner wall of the cavity 19, and the protective cover 2 is accommodated in the protective cover receiving groove 29. Specifically, under the above-mentioned setting, it is convenient to assemble the protective cover 2 in the protective cover receiving groove 29, and the protective cover 2 is prevented from protruding to the front end opening of the shell 1. Further, the protective cover positioning columns 27 are inserted into the protective cover insertion holes 26 to achieve accurate assembly of the protective cover 2.

[0063] In the embodiment of the present application, during the assembly process, when the rear end cover 7 is assembled to the rear end opening of the stator frame 3 with the coil 8, the rear positioning pins 14 that have been heated and hot-melted are inserted into the rear positioning holes 15 on both sides of the inner wall of the stator frame 3. During the assembly process, the rear positioning pins 14 that have been heated and hot-melted are inserted into the rear positioning holes 15. After cooling, the rear positioning pins 14 that have been heated and hot-melted are welded in the rear positioning holes 15, and the rear end cover 7 is stably connected to the stator frame 3 and is not easy to loosen. When the front end cover 6 is assembled to the front end opening of the stator frame 3, the front positioning pins 16 on both sides of one end face of the front end cover 6 are heated and hot-melted to a preset temperature, and then the front positioning pins 16 that have been hot-melted are inserted into the front positioning holes 17 on both sides of the inner wall of the stator frame 3. During the assembly process, the front positioning pins 16 that have been heated and hot-melted are inserted into the front positioning holes 17 7, after cooling, the front positioning pin 16 is heated and hot-melted and welded into the front positioning socket 17, and the front end cover 6 is stably connected to the stator frame 3 and is not easy to loosen; when the stator frame 3 is installed in the shell 1, the initial positioning is performed after the abutment block 18 and the support platform 20 are matched and abutted. During the process, the stator positioning pin 21 is hot-melted and then inserted into the stator positioning hole 22. After cooling, the stator positioning pin 21 is welded into the stator positioning hole 22, and the structure is strong, so that the stator frame 3 can be stably installed in the shell 1 and is not easy to loosen; when the protective cover 2 is assembled to the front end opening of the shell 1, the protective cover positioning pin 27 of the protective cover 2 is first hot-melted and then inserted into the protective cover socket 26. After cooling, the protective cover positioning pin 27 is welded into the protective cover socket 26, and the structure is strong, so that the protective cover 2 can be stably installed on the shell 1 and is not easy to loosen.

[0064] In the embodiment of the present application, a ball 28 is rotatably arranged at the rear end of the rotating shaft 5, and the ball 28 is in sliding contact with the bottom of the inner wall of the housing 1. Specifically, a pit is arranged at the center of the inner bottom wall of the cavity 19, and the ball 28 is rotatably arranged in the pit. Under the above arrangement, it is convenient to position the ball 28, and then to position the rear end of the rotating shaft 5, which can ensure the rotation stability and accuracy of the rotating shaft 5 on the one hand, and improve the smoothness of the rotating shaft 5 when rotating on the other hand.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. An automated assembly method for a micro motor, characterized in that: The following steps are involved: Step S1, loading the rear axle sleeve and the rear end cover, and installing the rear axle sleeve in the rear middle axle hole of the rear end cover; Step S2, heating and hot-melting the rear positioning pins on both sides of one end surface of the rear end cover to a preset temperature; Step S3, loading the stator frame, assembling the rear end cover on the rear end opening of the stator frame with the coil, and inserting the rear positioning pins of the rear end cover into the rear positioning holes on both sides of the inner wall of the stator frame; Step S4, loading the rotating shaft integrally formed with the rotor, and inserting the rear end of the rotating shaft integrally formed with the rotor from the front end inside the stator frame into the rear shaft sleeve of the rear end cover; Step S5, loading the front shaft sleeve and the front end cover, and installing the front shaft sleeve in the front middle shaft hole of the front end cover; Step S6, aligning the front sleeve of the front end cover with the front end of the rotating shaft, driving the front end cover to move, so that the front end of the rotating shaft passes through the front sleeve of the front end cover; Step S7, heating and hot-melting the front positioning pins on both sides of one end surface of the front end cover to a preset temperature; Step S8, assembling the front end cover at the front end opening of the stator frame, and inserting the front positioning pins of the front end cover into the front positioning holes on both sides of the inner wall of the stator frame; Step S9, loading the housing, assembling the stator frame with the coil into the housing from the front opening of the housing; Step S10, loading the protective cover, assembling the protective cover to the front end opening of the shell to close the front end opening of the shell, the protective cover is provided with an outer central axis hole for the front end of the rotating shaft to pass through; Abutment blocks are extended on both sides of the outer wall of the stator frame, the outer shell is provided with a cavity, support platforms are provided on both sides of the inner wall of the cavity, the abutment blocks are located above the support platforms, at least one stator positioning column is provided at the lower end of the abutment blocks, at least one stator positioning hole is provided on the support platform, and the stator positioning columns and the stator positioning holes are arranged in a one-to-one correspondence; in the step S9, when the stator frame with the coil is assembled from the front end opening of the outer shell to the cavity of the outer shell, the stator positioning columns are inserted into the stator positioning holes; The upper end surface of the support platform and the lower end surface of the abutment block are in horizontal abutment with each other; Before inserting the stator positioning column into the stator positioning hole, the stator positioning column is first heated and hot-melted to a preset temperature; Support blocks are respectively provided on the other two sides of the inner wall of the cavity, and protective cover insertion holes are provided on the support blocks. Protective cover positioning columns are respectively provided on the two sides of the lower end of the protective cover; in the step S10, when the protective cover is assembled to the front end opening of the shell, the protective cover positioning columns are first heated and hot-melted to a preset temperature, and then the protective cover positioning columns are inserted into the protective cover insertion holes until the protective cover closes the front end opening of the shell.

2. A micro motor assembled and produced by the automated assembly method according to claim 1, characterized in that: It includes a shell, a protective cover, a stator frame, a rotor, a rotating shaft, a front cover and a rear cover, wherein the stator frame is hollow, and a coil is wound around the outer peripheral wall of the stator frame; the stator frame is installed in the shell, the front opening of the shell is equipped with the protective cover, and the center of the protective cover is provided with an outer central axis hole; A front center shaft hole is formed at the center of the front end cover, a front shaft sleeve is installed in the front center shaft hole, a rear center shaft hole is formed at the center of the rear end cover, a rear shaft sleeve is installed in the rear center shaft hole; the rotating shaft is integrally formed with the rotor; The rear end cover is provided with rear positioning pins on both sides of an end surface close to the rear end of the stator frame, and the inner wall of the rear end of the stator frame is provided with rear positioning holes on both sides, and the rear positioning pins are inserted into the rear positioning holes. The rear end cover is used to cover the rear end opening of the stator frame; The rotor is movably mounted in the stator frame, and the rear end of the rotating shaft is slidably inserted into the rear shaft sleeve; Front positioning plugs are respectively arranged on both sides of an end surface of the front end cover close to the front end of the stator frame, and front positioning holes are respectively arranged on both sides of the inner wall of the front end of the stator frame. The front positioning plugs are inserted into the front positioning holes, and the front end cover is used to cover the front end opening of the stator frame; The front end of the rotating shaft is slidably inserted into the front shaft sleeve and the outer middle shaft hole.

3. A micro motor according to claim 2, characterized in that: Abutment blocks are extended on both sides of the stator frame, the shell is provided with a cavity, support platforms are provided on both sides of the inner wall of the cavity, the abutment block is located above the support platform, at least one stator positioning column is provided at the lower end of the abutment block, at least one stator positioning hole is provided on the support platform, and the stator positioning column and the stator positioning hole are arranged in a one-to-one correspondence; when the stator frame with the coil is assembled from the front end opening of the shell to the cavity of the shell, the stator positioning column is inserted into the stator positioning hole; the upper end surface of the support platform and the lower end surface of the abutment block are matched and abutted horizontally.

4. A micro motor according to claim 2, characterized in that: End cover supports are respectively arranged on both sides of the inner wall of the stator frame, a rear end mounting groove is formed between the rear end of the end cover support and the inner wall of the stator frame, the rear positioning plug hole is arranged at the rear end of the end cover support, and the rear end cover is installed in the rear end mounting groove; A front end mounting groove is formed between the front end of the end cover support body and the inner wall of the stator frame, the front positioning socket is arranged at the front end of the end cover support body, and the front end cover is installed in the front end mounting groove.

5. A micro motor according to claim 3, characterized in that: Support blocks are respectively provided on the other two sides of the inner wall of the cavity, and a protective cover insertion hole is provided on the support block, and protective cover positioning columns are respectively provided on the two sides of the lower end of the protective cover; when the protective cover is assembled to the front end opening of the shell, the protective cover positioning columns are inserted into the protective cover insertion holes until the protective cover closes the front end opening of the shell; a protective cover receiving groove is formed between the front end of the support block and the inner wall of the cavity, and the protective cover is accommodated in the protective cover receiving groove.

6. A micro motor according to claim 2, characterized in that: A ball is rotatably arranged at the rear end of the rotating shaft, and the ball is slidably abutted against the bottom of the inner wall of the shell.

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