Motor assembly equipment and use method thereof

Abstract

The invention provides motor assembly equipment and a use method thereof. The motor assembly equipment comprises a main shell, a stator, a rotor, a motor shaft, a transmission hole and a first bearing, the ejector pin can abut against or be separated from the output end of the motor shaft; the main shell is connected with a clamping assembly capable of clamping or separating from the output end of the motor shaft; the overturning assembly is used for overturning the main shell and the rear shell at the same time, the mounting assembly is used for driving the gear shaft assembly to move and connecting the gear shaft assembly to the output end of the motor shaft, and a distance sensor used for detecting the distance of the gear shaft assembly is arranged on the main shell or the clamping assembly. With the adoption of the structure, the use amount of one bearing can be reduced when each motor is assembled, and the assembling difficulty and cost are reduced.

Description

Technical Field

[0001] The present invention relates to motor assembly, in particular to motor assembly equipment and a method for using the same. Background Art

[0002] In the field of motor assembly technology, traditional installation processes typically utilize a two-bearing motor shaft positioning structure to achieve precise positioning and support. This method, with one bearing positioned at each end of the motor shaft, ensures a uniform air gap between the rotor and stator. This prevents radial rotor offset during assembly, which could cause abnormal engagement between the stator and rotor, potentially hindering subsequent assembly operations and even damaging motor components.

[0003] However, the four-bearing structure not only increases the complexity of the assembly process and reduces assembly efficiency, but also increases manufacturing costs. Therefore, how to simplify the bearing support structure, reduce the number of parts and reduce costs while effectively preventing the stator and rotor from engaging during assembly has become a pressing technical problem in this field. Summary of the Invention

[0004] To overcome the existing technical problems, the present invention provides a motor assembly device and a method for using the same, which reduces the number of single bearings and can also control the gap between the stator and the rotor.

[0005] The present invention adopts the following technical solutions.

[0006] A motor assembly device includes a rear housing and a main housing. The main housing is provided with a stator. The rear housing is connected to a rotor located in the stator and a motor shaft located in the rotor. The main housing is further provided with a transmission hole through which an output end of the motor shaft can extend. A first bearing is mounted on the other end of the motor shaft.

[0007] It also includes a thimble that can abut or disengage from the output end of the motor shaft, and the thimble is used to control the radial gap between the stator and the rotor;

[0008] The main housing is connected to a clamping assembly capable of clamping or disengaging the output end of the motor shaft. When the ejector pin is disengaged from the motor shaft, the output end of the motor shaft is clamped by the clamping assembly.

[0009] It also includes a flipping assembly for simultaneously flipping the main housing and the rear housing, and a mounting assembly for moving the gear shaft assembly and connecting it to the output end of the motor shaft. A distance sensor for detecting the distance of the gear shaft assembly is provided on the main housing or the clamping assembly, and the clamping assembly disengages from the output end of the motor shaft according to the distance of the gear shaft assembly.

[0010] As a further improvement of the present invention, the clamping assembly includes a fixed block connected to the main shell, two sliding blocks arranged opposite to each other and slidably connected to the fixed block, and a driving assembly capable of driving the sliding blocks to move closer to or away from each other.

[0011] As a further improvement of the present invention, the driving assembly includes two motor driving components and two transmission gears respectively connected to the output ends of the motor driving components, and the sliding blocks are each provided with a rack meshing with the transmission gears.

[0012] As a further improvement of the present invention, the sliding block is U-shaped, and the sliding block includes a transmission part that cooperates with the driving assembly, a clamping part for clamping the motor shaft, and a connecting part connecting the transmission part and the clamping part. A sliding through hole is provided on the upper surface of the fixed block, and the connecting part is located in the sliding through hole and can move back and forth along the length direction of the sliding through hole.

[0013] As a further improvement of the present invention, the distance sensor is arranged on the clamping part, and the fixed block covers the distance sensor when the clamping assembly is in the disengaged state. When the clamping assembly is in the clamped state, the distance sensor and the fixed block are arranged alternately.

[0014] As a further improvement of the present invention, the sliding blocks are each provided with a clamping recess for clamping the output end of the motor shaft, and the fixed block is C-shaped.

[0015] As a further improvement of the present invention, the gear shaft assembly includes a gear shaft, a connecting piece connected between the gear shaft and the motor shaft, a second bearing arranged between the connecting piece and the motor shaft, and a third bearing arranged between the connecting piece and the gear shaft, and the distance of the gear shaft assembly is the second bearing distance.

[0016] As a further improvement of the present invention, the motor shaft is provided with a spline, and the connecting piece is provided with an internal spline that cooperates with the spline.

[0017] The present invention also provides a method for using a motor assembly device, which is implemented using the motor assembly device described above and includes the following steps:

[0018] S1. Install the stator on the main housing, and install the rotor, first bearing, and motor shaft on the rear housing to form an upper assembly. Pass the ejector pin through the transmission hole and abut against the output end of the motor shaft.

[0019] S2, driving the upper assembly to move downward and install it on the main shell to form a bottom assembly;

[0020] S3. Clamp the motor shaft output end with the clamping assembly, remove the ejector pin, flip the bottom assembly over using the flip assembly and secure it so that the motor shaft output end faces upward.

[0021] S4. Identify the center coordinates of the motor shaft and send them to the mounting assembly. The mounting assembly grabs the gear shaft assembly and moves it to the center coordinates.

[0022] S5. The mounting assembly drives the gear shaft assembly to move downward. The internal spline in the gear shaft assembly cooperates with the spline of the motor shaft. When the distance of the gear shaft assembly detected by the distance sensor is less than the preset disengagement distance, the gear shaft assembly stops moving downward, and the clamping assembly disengages from the output end of the motor shaft.

[0023] S6. Continue to move the gear shaft assembly downward and assemble the gear shaft assembly onto the motor shaft.

[0024] As a further improvement of the present invention, the specific steps of identifying the center coordinates of the motor shaft are: identifying the center coordinates by taking a photo;

[0025] The breakaway distance is 1mm.

[0026] The beneficial effects of the present invention are as follows: since the radial clearance between the stator and the rotor needs to be maintained at 1mm when assembling the motor, otherwise the rotor will be attracted to the stator, the prior art usually adopts a double-bearing structure to assemble the motor shaft, that is, a bearing is connected to each end of the motor shaft, and if the two bearings on the gear shaft assembly are counted, it is a four-bearing installation. However, the present invention only adopts a single-bearing structure to assemble the motor shaft, and replaces the bearing with a clamping assembly to keep the motor shaft aligned and ensure that the stator and rotor are not attracted. After the gear shaft assembly is installed, the bearing on the gear shaft assembly replaces the clamping assembly to continue to keep the motor shaft aligned, thereby reducing the amount of one bearing used when assembling each motor, reducing the difficulty and cost of assembly. In addition, the clamping assembly is detachably connected to the main housing and can be removed after the motor assembly is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 is a structural diagram of step S1 of the method for using the present invention;

[0029] Figure 2 is a structural diagram of step S2 of the method for using the present invention;

[0030] Figure 3 This is a structural diagram of the clamping assembly in the clamping state in step S3 of the method of use of the present invention;

[0031] Figure 4is a structural diagram of step S4 of the method for using the present invention;

[0032] Figure 5 is a structural diagram of step S5 of the method of using the present invention;

[0033] Figure 6 is a structural diagram of step S6 of the method of using the present invention;

[0034] Figure 7 It is a structural schematic diagram of the clamping assembly of the present invention;

[0035] Figure 8 It is a structural schematic diagram of the clamping assembly of the present invention from another angle.

[0036] Description of reference numerals:

[0037] 1-rear housing, 11-rotor, 12-motor shaft, 13-first bearing, 2-main housing, 21-stator, 22-transmission hole, 3-thimble, 4-clamping assembly, 41-fixed block, 411-sliding through hole, 42-sliding block, 421-rack, 422-transmission part, 423-clamping part, 424-connecting part, 425-clamping recess, 43-drive assembly, 431-motor drive part, 432-transmission gear, 5-spline, 6-gear shaft assembly, 61-gear shaft, 62-connecting part, 63-second bearing, 64-third bearing, 65-inner spline, 7-distance sensor. DETAILED DESCRIPTION

[0038] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. In order to better illustrate this embodiment, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual size of the product.

[0039] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments.

[0040] Reference Figures 1 to 8 As can be seen, a motor assembly device includes a rear housing 1 and a main housing 2. The main housing 2 is provided with a stator 21. The rear housing 1 is connected to a rotor 11 located in the stator 21 and a motor shaft 12 located in the rotor 11. The main housing 2 is further provided with a transmission hole 22 for the output end of the motor shaft 12 to extend out. The motor shaft 12 is installed with a first bearing 13 at the other end.

[0041] It also includes a thimble 3 that can abut or disengage from the output end of the motor shaft 12, and the thimble 3 is used to control the radial gap between the stator 21 and the rotor 11;

[0042] The main housing 2 is connected to a clamping assembly 4 that can clamp or detach the output end of the motor shaft 12. When the ejector pin 3 detaches from the motor shaft 12, the output end of the motor shaft 12 is clamped by the clamping assembly 4.

[0043] It also includes a flipping assembly for simultaneously flipping the main shell 2 and the rear shell 1, and a mounting assembly for driving the gear shaft assembly 6 to move and connect it to the output end of the motor shaft 12. A distance sensor 7 for detecting the distance of the gear shaft assembly 6 is provided on the main shell 2 or the clamping assembly 4, and the clamping assembly 4 disengages from the output end of the motor shaft 12 according to the distance of the gear shaft assembly 6.

[0044] Since the radial clearance between the stator and the rotor needs to be maintained at 1mm during motor assembly, otherwise the rotor 11 will be attracted to the stator 21, the prior art generally uses a double-bearing structure to assemble the motor shaft 12, that is, a bearing is connected to each end of the motor shaft 12. If the two bearings on the gear shaft assembly 6 are counted, it is a four-bearing installation. However, the present invention only uses a single-bearing structure to assemble the motor shaft 12, and the clamping assembly 4 replaces the bearing to keep the motor shaft 12 centered, ensuring that the stator 21 and the rotor 11 are not attracted. After the gear shaft assembly 6 is installed, the bearing on the gear shaft assembly 6 replaces the clamping assembly 4 to continue to keep the motor shaft 12 centered, thereby reducing the use of one bearing when assembling each motor, reducing the difficulty and cost of assembly. In addition, the clamping assembly 4 is detachably connected to the main housing and can be removed after the motor assembly is completed.

[0045] Specifically, the clamping assembly 4 has a plurality of pins, and the main housing 2 is provided with a plurality of matching holes corresponding one-to-one to the pins.

[0046] Regarding the specific structure of the mounting assembly, the present invention adopts a manipulator, which is too common and thus will not be described in detail. Regarding the structure of the flip assembly, reference may be made to the structure of patent number CN209382974U, which will not be described in detail in the present invention.

[0047] Reference Figure 1 The structure of the clamping assembly 4 in the disengaged state, refer to Figure 3 The structure of the clamping assembly 4 in the clamping state, and the reference Figure 7 As can be seen from the structural diagram of the clamping assembly 4, the clamping assembly 4 includes a fixed block 41 connected to the main shell 2, two sliding blocks 42 arranged opposite to each other and slidably connected to the fixed block 41, and a driving assembly 43 capable of driving the sliding blocks 42 to move closer to or away from each other.

[0048] As a specific embodiment, the drive assembly 43 includes two motor drive members 431 and two transmission gears 432 respectively connected to the output ends of the motor drive members 431. The sliding blocks 42 are each provided with a rack 421 that meshes with the transmission gears 432. Of course, electric push rods can also be used to drive the sliding blocks 42 to move closer to or away from each other.

[0049] The forward and reverse rotation of the motor drive 431 can drive the sliding blocks 42 toward or away from each other. The mechanical engagement between the transmission gear 432 and the rack 421 not only achieves a reliable self-locking effect, but also allows for precise adjustment of the movement distance. This allows the motor shaft 12 to be aligned when the two sliding blocks 42 approach each other, reducing the tilt angle and thus preventing the rotor 11 from being attracted to the stator 21.

[0050] Reference Figure 8 The structure of the sliding block 42 is U-shaped. The sliding block 42 includes a transmission part 422 that cooperates with the driving assembly 43, a clamping part 423 for clamping the motor shaft 12, and a connecting part 424 connecting the transmission part 422 and the clamping part 423. A sliding through hole 411 is provided on the upper surface of the fixed block 41, and the connecting part 424 is located in the sliding through hole 411 and can move back and forth along the length direction of the sliding through hole 411.

[0051] The connecting portion 424 is located and moves within the sliding hole 411, which can prevent the sliding block 42 from protruding too much from the fixed block 41 and causing the sliding block 42 to hit other components. In addition, the connecting portion 424 is confined within the inner side wall of the sliding hole 411, which can provide a guiding function.

[0052] Reference Figure 8 The distance sensor 7 is arranged on the clamping portion 423. When the clamping assembly 4 is in the disengaged state, the fixed block 41 covers the distance sensor 7. When the clamping assembly 4 is in the clamped state, the distance sensor 7 and the fixed block 41 are arranged alternately.

[0053] Specifically, the distance sensor 7 is an infrared distance sensor. The infrared distance sensor uses the principle that the reflection intensity of the infrared signal is different when it encounters an obstacle to detect the distance of the obstacle. It has a pair of infrared signal transmitting and receiving diodes. The transmitting tube transmits an infrared signal of a specific frequency, and the receiving tube receives the infrared signal of this frequency. When the infrared detection direction encounters an obstacle, the infrared signal is reflected back and received by the receiving tube. After being processed by the signal processor, the distance of the object is calculated based on the change in the intensity of the reflected light. Since the distance of the object is calculated by reflection, when the clamping assembly 4 clamps the motor shaft 12, the distance sensor 7 needs to be arranged in an interlaced manner with the fixed block 41 in order to detect the distance of the gear shaft assembly 6. When the clamping assembly 4 is in a disengaged state, the infrared distance sensor can reduce the detection frequency or shut down directly when it continuously detects that the distance is similar to the distance to the fixed block, and will not be activated again until the clamping assembly 4 switches to the clamping state, thereby reducing power consumption and increasing service life.

[0054] At this time, it should be noted that, since the clamping portion 423 protrudes from the fixed block 41, the only part of the clamping assembly 4 that can collide with the gear shaft assembly 6 is the clamping portion 423. Therefore, the distance sensor 7 is directly arranged on the clamping portion 423 to detect how much of the remaining safety distance is. In addition, the distance sensor 7 is not only used to detect how much of the safety distance is, but can also detect from the side whether the internal spline of the gear shaft assembly 6 has been partially inserted into the spline of the motor shaft 12. When the internal spline of the gear shaft assembly 6 is partially inserted into the spline of the motor shaft 12, the output end of the motor shaft 12 is effectively fixed, preventing the output end of the motor shaft 12 from becoming a free end when the clamping assembly 4 is switched to the disengaged state, thereby causing the rotor 11 to be attracted to the stator 12. Therefore, according to the distance of the gear shaft assembly 6 from the output end of the motor shaft 12, the distance should be between the insertion distance of the internal spline of the gear shaft assembly 6 and the collision distance of the clamping portion 423.

[0055] Reference Figure 7 The sliding blocks 42 are each provided with a clamping recess 425 for clamping the output end of the motor shaft 12, and the fixed block 41 is C-shaped. Since the motor shaft 12 is a cylinder, the clamping recess 425 is provided to enable the two sliding blocks 42 to center and clamp the motor shaft 12.

[0056] Reference Figure 4 The gear shaft assembly 6 includes a gear shaft 61, a connecting member 62 connected between the gear shaft 61 and the motor shaft 12, a second bearing 63 arranged between the connecting member 62 and the motor shaft 12, and a third bearing 64 arranged between the connecting member 62 and the gear shaft 61. The distance between the gear shaft assembly 6 and the second bearing 63 is the distance.

[0057] Since the second bearing 63 is located at the bottom of the gear shaft assembly, directly detecting the distance of the second bearing 63 can effectively determine the distance between the gear shaft assembly 6 and the distance sensor 7 .

[0058] As a further improvement of the present invention, the motor shaft 12 is provided with a spline, and the connecting member 62 is provided with an internal spline 65 that cooperates with the spline.

[0059] The present invention also provides a method for using a motor assembly device, which is implemented using the motor assembly device described above and includes the following steps:

[0060] S1. Install the stator 21 on the main housing 2, and install the rotor 11, the first bearing 13, and the motor shaft 12 on the rear housing 1 to form an upper assembly. The ejector pin 3 passes through the transmission hole 22 and abuts against the output end of the motor shaft 12.

[0061] S2, driving the upper assembly to move downward and install it on the main housing 2 to form a bottom assembly;

[0062] S3, clamp the output end of the motor shaft 12 with the clamping assembly 4, pull out the ejector pin 3, flip the bottom assembly over and fix it using the flip assembly so that the output end of the motor shaft 12 faces upward;

[0063] S4, identifying the center coordinates of the motor shaft 12, sending the center coordinates to the mounting assembly, and the mounting assembly grabs the gear shaft assembly 6 and moves it to the center coordinates;

[0064] S5. The mounting assembly drives the gear shaft assembly 6 to move downward, and the internal spline 65 in the gear shaft assembly 6 cooperates with the spline 5 of the motor shaft 12. When the distance of the gear shaft assembly 6 detected by the distance sensor 7 is less than the preset disengagement distance, the gear shaft assembly 6 stops moving downward, and the clamping assembly 4 disengages from the output end of the motor shaft 12.

[0065] S6 , the gear shaft assembly 6 continues to move downward, and the gear shaft assembly 6 is assembled onto the motor shaft 12 .

[0066] Specifically, the gear shaft assembly 6 can be assembled into place by moving it downward by another 20 mm.

[0067] As a further improvement of the present invention, the specific steps of identifying the center coordinates of the motor shaft 12 are: identifying the center coordinates by taking a photo;

[0068] The breakaway distance is 1mm.

[0069] Regarding the setting of the disengagement distance, as mentioned above, the distance sensor 7 is not only used to detect the safety distance, but can also indirectly detect whether the internal splines of the gear shaft assembly 6 have been partially inserted into the splines of the motor shaft 12. When the internal splines of the gear shaft assembly 6 are partially inserted into the splines of the motor shaft 12, the output end of the motor shaft 12 is effectively fixed, preventing the output end of the motor shaft 12 from becoming a free end when the clamping assembly 4 is switched to the disengaged state, thereby causing the rotor 11 to be attracted to the stator 12. Therefore, based on the distance of the gear shaft assembly 6 from the output end of the motor shaft 12, the distance should be between the insertion distance of the internal splines of the gear shaft assembly 6 and the collision distance of the clamping portion 423.

[0070] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the claims of the present invention.

Claims

1. A motor assembly device, characterized in that: The motor comprises a rear housing and a main housing, wherein a stator is disposed in the main housing, the rear housing is connected to a rotor located in the stator, and a motor shaft located in the rotor, the main housing further comprising a transmission hole through which an output end of the motor shaft can extend, and a first bearing is mounted at the other end of the motor shaft; It also includes a thimble capable of abutting or disengaging from the output end of the motor shaft, the thimble being used to control the radial gap between the stator and the rotor; The main housing is connected to a clamping assembly capable of clamping or detaching the output end of the motor shaft, and when the ejector pin is detached from the motor shaft, the output end of the motor shaft is clamped by the clamping assembly; It also includes a flipping assembly for simultaneously flipping the main housing and the rear housing, and a mounting assembly for moving the gear shaft assembly and connecting it to the output end of the motor shaft. The main housing or the clamping assembly is provided with a distance sensor for detecting the distance of the gear shaft assembly, and the clamping assembly disengages from the output end of the motor shaft according to the distance of the gear shaft assembly.

2. The motor assembly equipment according to claim 1, characterized in that: The clamping assembly includes a fixed block connected to the main housing, two sliding blocks arranged opposite to each other and slidably connected to the fixed block, and a driving assembly capable of driving the sliding blocks to move closer to or away from each other.

3. The motor assembly equipment according to claim 2, characterized in that: The driving assembly includes two motor driving components and two transmission gears respectively connected to the output ends of the motor driving components. The sliding blocks are each provided with a rack meshing with the transmission gears.

4. The motor assembly equipment according to claim 2, characterized in that: The sliding block is U-shaped and includes a transmission part that cooperates with the drive assembly, a clamping part for clamping the motor shaft, and a connecting part connecting the transmission part and the clamping part. A sliding through hole is provided on the upper surface of the fixed block, and the connecting part is located in the sliding through hole and can move back and forth along the length direction of the sliding through hole.

5. The motor assembly equipment according to claim 4, characterized in that: The distance sensor is arranged on the clamping portion. When the clamping assembly is in a disengaged state, the fixing block covers the distance sensor. When the clamping assembly is in a clamped state, the distance sensor and the fixing block are arranged alternately.

6. The motor assembly equipment according to claim 2, characterized in that: The sliding blocks are each provided with a clamping recess for clamping the output end of the motor shaft, and the fixed block is C-shaped.

7. The motor assembly equipment according to claim 1, characterized in that: The gear shaft assembly includes a gear shaft, a connecting piece connected between the gear shaft and the motor shaft, a second bearing arranged between the connecting piece and the motor shaft, and a third bearing arranged between the connecting piece and the gear shaft, and the gear shaft assembly distance is the second bearing distance.

8. The motor assembly equipment according to claim 7, characterized in that: The motor shaft is provided with a spline, and the connecting piece is provided with an internal spline that matches the spline.

9. A method for using a motor assembly device, implemented using the motor assembly device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Install the stator on the main housing, and install the rotor, first bearing, and motor shaft on the rear housing to form an upper assembly. Pass the ejector pin through the transmission hole and abut against the output end of the motor shaft. S2, driving the upper assembly to move downward and install it on the main shell to form a bottom assembly; S3. Clamp the motor shaft output end with the clamping assembly, remove the ejector pin, flip the bottom assembly over using the flip assembly and secure it so that the motor shaft output end faces upward. S4. Identify the center coordinates of the motor shaft and send the center coordinates to the mounting assembly. The mounting assembly grabs the gear shaft assembly and moves it to the center coordinates. S5. The mounting assembly drives the gear shaft assembly to move downward. The internal spline in the gear shaft assembly cooperates with the spline of the motor shaft. When the distance of the gear shaft assembly detected by the distance sensor is less than the preset disengagement distance, the gear shaft assembly stops moving downward, and the clamping assembly disengages from the output end of the motor shaft. S6. Continue to move the gear shaft assembly downward and assemble the gear shaft assembly onto the motor shaft.

10. The method for using the motor assembly equipment according to claim 9, characterized in that: The specific steps of identifying the center coordinates of the motor shaft are: identifying the center coordinates by taking a photo; The breakaway distance is 1 mm.

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