Motor assembly method and motor

Abstract

This invention discloses a motor assembly method and a motor. The motor assembly method includes: fixing a worm gear and taking a visual photograph of the worm gear to obtain a first visual image; calculating a first rotation angle based on the first visual image; fixing a helical gear and taking a visual photograph of the end face of the helical gear to obtain a second visual image; calculating a second rotation angle based on a standard helical gear image and the second visual image; calculating the actual rotation angle of the helical gear around its own central axis based on the first and second rotation angles; moving the helical gear to a first set height position directly above the worm gear; controlling the helical gear to rotate around its own central axis by the actual rotation angle; and moving the helical gear vertically downward to align and mesh with the worm gear. Compared with the prior art, this method avoids scratches or even structural damage to the helical gear and / or worm gear during assembly, effectively improving the precision and accuracy of assembling the helical gear and worm gear, and increasing the assembly yield.

Description

Technical Field

[0001] This invention relates to the field of assembly technology, and more particularly to a motor assembly method and a motor. Background Technology

[0002] For electric motors, the motor body, worm gear, and helical gear are all important structural components that contribute to the output torque. The output shaft of the motor body is either the worm shaft or the output shaft of the motor body is connected to the worm. The worm and helical gear mesh to transmit the rotational torque output by the motor body. Therefore, proper assembly of the worm gear and helical gear is a crucial factor in improving the performance and lifespan of the motor.

[0003] In existing technologies, helical gears are typically assembled onto worm gears using either manual or fully automated methods. However, manual assembly is inefficient and lacks precision. Fully automated assembly involves powering a motor to rotate the worm, which then automatically seeks the meshing surface with the helical gear. While this method improves efficiency, the motor speed is difficult to control. During the worm's automatic search for the meshing surface, scratches and even structural damage can easily occur between the worm and the helical gear. This is particularly pronounced when assembling worms made of metal and helical gears made of plastic, leading to low assembly yield. Summary of the Invention

[0004] The purpose of this invention is to provide a motor assembly method and a motor, in order to solve the problem that although the existing motor assembly methods can improve assembly efficiency, the helical gears and / or worm gears are scratched or even structurally damaged during the assembly process, resulting in a low assembly yield.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An electric motor assembly method for assembling a worm gear and a helical gear includes:

[0007] Fix the worm gear and take a visual photograph of the worm gear to obtain a first visual image;

[0008] Calculate the first rotation angle based on the first visual image;

[0009] The helical gear is fixed and its end face is photographed to obtain a second visual image;

[0010] The second rotation angle is calculated based on the standard helical gear image and the second visual image;

[0011] The actual rotation angle of the helical gear is calculated based on the first rotation angle and the second rotation angle;

[0012] Move the helical gear to a first predetermined height position directly above the worm; control the helical gear to rotate around its own central axis by the actual rotation angle;

[0013] The helical gear is moved vertically downwards to mesh with the worm gear.

[0014] As a preferred embodiment of the above-mentioned motor assembly method, the motor includes a motor housing and a motor assembly, wherein the motor assembly includes a motor body and a worm gear;

[0015] The specific steps for fixing the worm gear and taking visual photographs of the worm gear include:

[0016] The worm gear is assembled into the motor body;

[0017] The motor body is assembled into the motor housing;

[0018] The structure formed by the motor housing and the motor assembly is placed in a dark room and the motor housing is fixed in the dark room at its designated position.

[0019] The light source and the first vision camera are both fixed directly above the worm gear;

[0020] The light source illuminates the worm gear;

[0021] The first vision camera takes a visual picture of the worm gear.

[0022] As a preferred embodiment of the above-mentioned motor assembly method, the specific steps for calculating the first rotation angle based on the first visual image include:

[0023] Capture the position of a first bright spot between adjacent helical teeth within a defined area on the worm in the first visual image; calculate the distance between the center position of the first end face of the first calibration helical tooth of the worm and the center position of the first bright spot along the axial direction of the worm, which is the first axial distance; calculate the distance between two adjacent first bright spots, which is the second axial distance;

[0024] Obtain the standard axial spacing;

[0025] The first rotation angle is calculated based on Δθ1 = [Δx1 * (360 / A)] / Δx2; where Δθ1 is the first rotation angle; Δx1 is the absolute value of the difference between the first axial spacing and the standard axial spacing; A is the number of teeth of the helical gear; and Δx2 is the second axial spacing.

[0026] As a preferred embodiment of the above-mentioned motor assembly method, the specific steps for calculating the second rotation angle based on the standard helical gear image and the second visual image include:

[0027] Obtain a standard helical gear image;

[0028] Using the center of the end face of the standard helical gear in the standard helical gear image as the reference center, the center of the end face of the helical gear in the second visual image is made to coincide with the reference center;

[0029] Using the reference center as the rotation center, rotate the helical gear in the second visual image to make it coincide with the standard helical gear in the standard helical gear image;

[0030] The rotation angle when the helical gear in the second visual image coincides with the standard helical gear in the standard helical gear image is obtained, which is the second rotation angle.

[0031] As a preferred embodiment of the above-mentioned motor assembly method, the specific steps for calculating the actual rotation angle of the helical gear based on the first rotation angle and the second rotation angle include:

[0032] The actual rotation angle of the helical gear is calculated based on Δθ = ±Δθ1 + Δθ2;

[0033] Where Δθ is the actual rotation angle; Δθ1 is the first rotation angle; and Δθ2 is the second rotation angle.

[0034] As a preferred embodiment of the above-mentioned motor assembly method, the motor includes a helical gear assembly, the helical gear assembly includes a drive shaft and the helical gear, the helical gear is fixedly disposed on the drive shaft, and a limiting groove is provided at the end of the drive shaft away from the helical gear;

[0035] Between controlling the helical gear to rotate around its own central axis according to the actual rotation angle, and moving the helical gear vertically downward to mesh with the worm, the following steps are also included:

[0036] A limiting pin is inserted into the limiting groove of the drive shaft from bottom to top along the vertical direction and is pressed against the inner bottom wall of the limiting groove.

[0037] As a preferred embodiment of the above-mentioned motor assembly method, the specific steps for moving the helical gear vertically downward to engage with the worm gear include:

[0038] The helical gear assembly and the limiting pin are moved synchronously downward along the vertical direction to the second predetermined height position;

[0039] Release the helical gear assembly;

[0040] The limiting pin is moved downward along the vertical direction until the helical gear contacts the worm gear;

[0041] The limiting pin is moved downward along the vertical direction, so that the limiting pin separates from the inner bottom wall of the limiting groove and is partially located in the limiting groove; at the same time, the helical gear meshes with the worm under its own gravity.

[0042] Wherein, along the vertical direction, the height distance between the first set height position and the worm gear is greater than the height distance between the second set height position and the worm gear.

[0043] As a preferred embodiment of the above-mentioned motor assembly method, the limiting groove includes a first groove and a second groove disposed on the inner peripheral wall of the first groove, and the limiting pin can be inserted into the first groove and the second groove.

[0044] As a preferred embodiment of the above-mentioned motor assembly method, during the process of the helical gear meshing with the worm under its own weight, a downward pressure is applied to the helical gear assembly in the vertical direction.

[0045] Once the helical gear and the worm are engaged, the limiting pin is pulled out of the limiting groove along the vertical direction to stop applying downward pressure to the helical gear assembly.

[0046] The motor includes a worm gear and a helical gear, and the worm gear and the helical gear are assembled using the motor assembly method described above.

[0047] The beneficial effects of this invention are:

[0048] The present invention aims to provide a motor assembly method, which includes: fixing a worm gear and taking a visual photograph of the worm gear to obtain a first visual image; calculating a first rotation angle based on the first visual image; fixing a helical gear and taking a visual photograph of the end face of the helical gear to obtain a second visual image; calculating a second rotation angle based on a standard helical gear image and the second visual image; calculating the actual rotation angle of the helical gear around its own central axis based on the first and second rotation angles; moving the helical gear to a first predetermined height position directly above the worm gear; controlling the helical gear to rotate around its own central axis by the actual rotation angle; and moving the helical gear vertically downward to align and mesh with the worm gear. It can be understood that the angle of deflection of the worm gear relative to a standard worm gear is calculated using the first visual image, and the angle of deflection of the helical gear relative to a standard helical gear is calculated by comparing the standard helical gear image and the second visual image. During the assembly of the worm gear and the helical gear, the worm gear is controlled not to rotate, and only the helical gear is controlled to rotate around its own central axis based on the calculated actual rotation angle of the helical gear around its own central axis. Once the helical gear has rotated to the correct position, it is only necessary to move the helical gear downward along its central axis to align and mesh with the worm gear. Compared with existing technologies, this method avoids scratches or even structural damage to helical gears and / or worms during assembly, effectively improving the precision and accuracy of assembling helical gears and worms, and increasing the assembly yield.

[0049] The present invention also provides an electric motor comprising a worm and a helical gear, wherein the worm and the helical gear are assembled using the above-described motor assembly method. Compared with the prior art, this method avoids scratches or even structural damage to the helical gear and / or worm during assembly, effectively improving the precision and accuracy of assembling the helical gear and worm, and increasing the assembly yield. Attached Figure Description

[0050] Figure 1 This is a flowchart of a motor assembly method provided in a specific embodiment of the present invention;

[0051] Figure 2 This is a partial structural diagram of the motor provided in a specific embodiment of the present invention;

[0052] Figure 3 This is a schematic diagram of the worm gear structure of a motor provided in a specific embodiment of the present invention;

[0053] Figure 4 This is a partial exploded view of the motor provided in a specific embodiment of the present invention.

[0054] In the picture:

[0055] 100. Limiting pin; 200. Second bright spot;

[0056] 1. Worm gear; 11. First bright spot; 12. First calibration helical tooth; 121. First end face;

[0057] 2. Helical gear; 3. Motor housing; 4. Motor body; 5. Drive shaft. Detailed Implementation

[0058] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0059] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0062] In existing technologies, helical gears are typically assembled onto worm gears using either manual or fully automated methods. However, manual assembly is inefficient and lacks precision. Fully automated assembly involves powering a motor to rotate the worm, which then automatically seeks the meshing surface with the helical gear. While this method improves efficiency, the motor speed is difficult to control. During the worm's automatic search for the meshing surface, scratches and even structural damage can easily occur between the worm and the helical gear. This is particularly pronounced when assembling worms made of metal and helical gears made of plastic, leading to low assembly yield.

[0063] Therefore, in response to this phenomenon, the present invention provides a motor assembly method, which, compared with the prior art, avoids the phenomenon of helical gear 2 and / or worm gear 1 being scratched or even causing structural damage during the assembly process, effectively improving the precision and accuracy of assembling helical gear 2 and worm gear 1, and improving the assembly yield.

[0064] like Figure 1 As shown, the motor assembly method specifically includes:

[0065] S100: Fix the worm gear 1 and take a visual photograph of the worm gear 1 to obtain a first visual image.

[0066] Specifically, the steps for fixing the worm gear 1 and taking visual photographs of the worm gear 1 include:

[0067] The worm gear 1 is assembled onto the motor body 4.

[0068] The motor body 4 is assembled into the motor housing 3. It is understood that when the motor body 4 is assembled, the worm gear 1 is also assembled.

[0069] The structure formed by the motor housing 3 and the motor assembly is placed in a darkroom, and the motor housing 3 is fixed in its designated position within the darkroom. This arrangement prevents external light sources from affecting the accuracy of the captured first-view image. As an alternative, this motor assembly method can also be performed in a darkroom.

[0070] The light source and the first vision camera are both fixed directly above the worm gear 1. Since the motor body 4 and the worm gear 1 are both assembled in the motor housing 3, the light source and the first vision camera can only be fixed directly above the worm gear 1. This arrangement also makes the worm gear 1 reflect light illuminating from only one direction, and can form a first bright spot 11 on the outer peripheral surface between adjacent helical teeth.

[0071] The light source illuminates the worm gear 1, causing a first bright spot 11 to form on the outer peripheral surface between adjacent helical teeth of the worm gear 1.

[0072] The first-person camera takes a visual picture of the worm gear 1.

[0073] Therefore, based on the ability to capture first-view images, the accuracy of the captured first-view images can be effectively improved.

[0074] S200. Calculate the first rotation angle based on the standard worm gear image and the first visual image.

[0075] Specifically, the steps for calculating the first rotation angle based on the standard worm gear image and the first visual image include:

[0076] S210, such as Figure 3 As shown, the position of a first bright spot 11 between adjacent helical teeth in a set area on the worm gear 1 in the first visual image is captured; along the axial direction of the worm gear 1, the distance between the center position of the first end face 121 of the first calibration helical tooth 12 of the worm gear 1 and the center position of the first bright spot 11 is calculated as the first axial distance; the distance between two adjacent first bright spots 11 is calculated as the second axial distance.

[0077] S220, Obtain the standard axial spacing.

[0078] Specifically, a table can be pre-stored, from which the standard axial spacing can be retrieved. This table is formed by the model number of the worm gear 1 and its standard axial spacing. The table was obtained through extensive prior testing.

[0079] As an alternative, the specific steps for obtaining the standard axial spacing include:

[0080] Obtain a standard worm gear image. Preferably, the standard worm gear is placed in a dark chamber and fixed in its designated position within the chamber; the standard worm gear is rotated so that the second end faces of the second calibration helical teeth on the standard worm gear are vertically distributed at the uppermost end of the standard worm gear; a light source and a second vision camera are both fixed directly above the standard worm gear; the light source illuminates the standard worm gear; the second vision camera takes a visual photograph of the standard worm gear to obtain an image of the standard worm gear.

[0081] Capture the position of a second bright spot 200 between adjacent helical teeth within a set area on the standard worm in the image of the standard worm; along the axial direction of the standard worm, calculate the distance between the center position of the second end face of the second calibration helical tooth of the standard worm and the center position of the second bright spot 200, which is the standard axial distance.

[0082] S230, such as Figure 3 As shown, the first rotation angle is calculated based on Δθ1=[Δx1*(360 / A)] / Δx2; where Δθ1 is the first rotation angle; Δx1 is the absolute value of the difference between the first axial spacing and the standard axial spacing; A is the number of teeth of the helical gear 2; and Δx2 is the second axial spacing.

[0083] Specifically, steps S210 and S220 can be executed simultaneously, or the order of steps S210 and S220 can be reversed.

[0084] S300, fix the helical gear 2 and take a visual photograph of the end face of the helical gear 2 to obtain a second visual image.

[0085] Specifically, the steps for fixing the helical gear 2 and taking visual photographs of its end face include:

[0086] Fix the helical gear 2; fix the light source and the third vision camera, so that the light source and the third vision camera are both facing one end face of the helical gear 2; the light source illuminates the worm 1; the third vision camera takes a visual picture of the end face of the helical gear 2 to obtain a second vision image.

[0087] Understandably, by taking a picture of the end face of helical gear 2, the circumferential distribution of each tooth on helical gear 2 can be clearly reflected, which makes it convenient to calculate the second rotation angle.

[0088] S400, calculate the second rotation angle based on the standard helical gear image and the second visual image.

[0089] Specifically, the steps for calculating the second rotation angle based on the standard helical gear image and the second visual image include:

[0090] Obtain a standard helical gear image. This image can be pre-stored. The method for obtaining the standard helical gear image is the same as the method for obtaining the second-view image.

[0091] Using the center of the end face of the standard helical gear in the standard helical gear image as the reference center, the center of the end face of the helical gear 2 in the second visual image is aligned with the reference center.

[0092] Using the reference center as the rotation center, rotate the helical gear 2 in the second visual image to make it coincide with the helical gear 2 in the standard helical gear image.

[0093] The rotation angle when the helical gear 2 in the rotated second visual image coincides with the standard helical gear in the standard helical gear image is the second rotation angle.

[0094] Preferably, the rotation angle at the moment when the helical gear 2 in the second visual image and the standard helical gear in the standard helical gear image first coincide is selected as the second rotation angle. As an alternative, the sum of the rotation angle at the moment when the helical gear 2 in the second visual image and the standard helical gear in the standard helical gear image first coincide, and (360 / A) can also be used as the second rotation angle, where A is the number of teeth of the helical gear 2.

[0095] S100 and S200, and S300 and S400 can be performed simultaneously. Alternatively, S100 to S400 can be performed sequentially. In this embodiment, S100 to S400 are performed sequentially as an example.

[0096] S500. Calculate the actual rotation angle of the helical gear 2 around its own central axis based on the first rotation angle and the second rotation angle.

[0097] Specifically, the actual rotation angle of helical gear 2 around its own central axis is calculated based on Δθ=±Δθ1+Δθ2.

[0098] Where Δθ is the actual rotation angle; Δθ1 is the first rotation angle; and Δθ2 is the second rotation angle.

[0099] Specifically, such as Figure 4 As shown, if the distribution position of the first end face 121 of the first calibration helical tooth 12 of the worm 1 is to coincide with the distribution position of the second end face of the second calibration helical tooth of the standard worm, the worm 1 needs to be rotated clockwise around its own central axis in the direction of ab. When the end face of the helical gear 2 is to coincide with the end face of the standard helical gear 2, the helical gear 2 needs to be rotated clockwise around its own central axis in the direction of cd. In this case, Δθ=Δθ1+Δθ2.

[0100] If the distribution position of the first end face 121 of the first calibration helical tooth 12 of the worm 1 is to be aligned with the distribution position of the second end face of the second calibration helical tooth of the standard worm, the worm 1 needs to be rotated clockwise around its own central axis in the ef direction. When the end face of the helical gear 2 is aligned with the end face of the standard helical gear 2, the helical gear 2 needs to be rotated clockwise around its own central axis in the cd direction. In this case, Δθ = (-Δθ1) + Δθ2.

[0101] Among them, such as Figure 4 As shown, the clockwise direction of ab is opposite to that of ef.

[0102] S600, move the helical gear 2 to the first set height position directly above the worm gear 1; control the helical gear 2 to rotate around its own central axis by the actual rotation angle.

[0103] Understandably, with this setup, the helical gear 2 can mesh with the worm gear 1 by moving vertically downwards in the vertical direction.

[0104] Specifically, the helical gear 2 is moved to a first predetermined height position directly above the worm gear 1 using a robotic arm or similar mechanism. In this embodiment, the helical gear 2 is exemplarily moved to the first predetermined height position directly above the worm gear 1 using a robotic arm. The first predetermined height position is a pre-set position that allows the helical gear 2 to move vertically downwards in the vertical direction to mesh with the worm gear 1.

[0105] It is understood that in this embodiment, during the process of moving the helical gear 2 to the first set height position directly above the worm gear 1, the robotic arm does not drive the helical gear 2 to rotate around its own central axis or to revolve around a certain set reference center line.

[0106] If, during the process of moving the helical gear 2 to the first set height position directly above the worm gear 1, the robotic arm drives the helical gear 2 to rotate around its own central axis or to revolve around a certain set reference center line, where the rotation angle is the third rotation angle, then after moving the helical gear 2 to the first set height position directly above the worm gear 1, the actual rotation angle is calculated based on the first rotation angle, the second rotation angle, and the third rotation angle, and then the helical gear 2 is controlled to rotate around its own central axis by the actual rotation angle.

[0107] Specifically, the steps for calculating the actual rotation angle based on the first rotation angle, the second rotation angle, and the third rotation angle include: calculating the theoretical rotation angle of the helical gear 2 around its own central axis based on the first and second rotation angles; and calculating the actual rotation angle of the helical gear 2 around its own central axis based on the theoretical and third rotation angles. The method for calculating the theoretical rotation angle of the helical gear 2 around its own central axis based on the first and second rotation angles is the same as the method for calculating the actual rotation angle of the helical gear 2 around its own central axis based on the first and second rotation angles in step S500.

[0108] S700, move the helical gear 2 vertically downwards to mesh with the worm gear 1.

[0109] In order to improve the precision and accuracy of assembling the helical gear 2 and the worm gear 1, between steps S600 and S700, the following is also included: in the vertical direction, the limiting pin 100 is inserted from bottom to top into the limiting groove of the transmission shaft 5 and pressed against the inner bottom wall of the limiting groove.

[0110] This design prevents the helical gear 2 from tilting as it moves downwards in the vertical direction, thereby further improving the precision and accuracy of assembling the helical gear 2 and the worm gear 1.

[0111] Specifically, the limiting groove includes a first groove and a second groove disposed on the inner peripheral wall of the first groove, and the limiting pin 100 can be inserted into the first and second grooves. This arrangement prevents the helical gear 2 from tilting during its downward vertical movement and also prevents the helical gear 2 from rotating around its own central axis, thereby further improving the precision and accuracy of assembling the helical gear 2 and the worm gear 1. Specifically, the limiting groove is a groove on the worm gear 1 that connects with other components.

[0112] As an alternative, a detachable limiting member can be connected to the end of the drive shaft 5 away from the helical gear 2. The limiting member has a limiting groove, and the limiting pin 100 can be inserted into the limiting groove.

[0113] Specifically, the steps for moving the helical gear 2 vertically downwards to mesh with the worm gear 1 include:

[0114] The helical gear assembly and the limiting pin 100 are moved vertically downwards synchronously to a second preset height position. The second preset height position is a pre-set position that allows the helical gear 2 to move vertically downwards and mesh with the worm gear 1.

[0115] Loosen the helical gear assembly.

[0116] The limiting ejector pin 100 moves vertically downward until the helical gear 2 contacts the worm gear 1. The limiting ejector pin 100 is inserted into the transmission shaft 5. During the process of the limiting ejector pin 100 moving vertically downward, it drives the helical gear 2 to move downward in the vertical direction simultaneously.

[0117] The limiting ejector pin 100 is moved downwards in the vertical direction, separating it from the inner bottom wall of the limiting groove and partially placing it within the groove. Simultaneously, the helical gear 2 meshes with the worm gear 1 under its own weight. Specifically, the limiting ejector pin 100 separates from the second groove. This configuration ensures that the limiting ejector pin 100 prevents the helical gear 2 from tilting during meshing with the worm gear 1 and allows it to rotate around its central axis. This allows the helical gear 2 to mesh well with the worm gear 1 under its own weight, further improving the precision and accuracy of assembling the helical gear 2 and worm gear 1. It is understood that the vertical direction is parallel to the direction of gravity of the helical gear 2.

[0118] In the vertical direction, the height distance between the first set height position and the worm gear 1 is greater than the height distance between the second set height position and the worm gear 1.

[0119] To improve assembly efficiency, the motor assembly method also includes:

[0120] During the process of the helical gear 2 meshing with the worm gear 1 under its own weight, it applies downward pressure along the vertical direction of the helical gear assembly.

[0121] Once the helical gear 2 and the worm gear 1 are engaged, the limiting pin 100 is pulled out of the limiting groove in the vertical direction to stop applying downward pressure to the helical gear assembly.

[0122] This configuration effectively improves the assembly efficiency of helical gear 2 and worm gear 1.

[0123] The present invention also provides an electric motor, such as Figure 2-4As shown, the device includes a worm gear 1 and a helical gear 2, which are assembled using the aforementioned motor assembly method. Compared to existing technologies, this method avoids scratches or structural damage to the helical gear 2 and / or worm gear 1 during assembly, effectively improving the precision and accuracy of assembling the helical gear 2 and worm gear 1, and increasing the assembly yield.

[0124] Among them, such as Figure 2-4 As shown, the motor also includes a motor housing 3 and a motor assembly. The motor assembly includes a motor body 4 and a worm gear 1, and the motor assembly is fixedly installed inside the motor housing 3.

[0125] Specifically, such as Figure 4 As shown, the motor also includes a helical gear assembly, which includes a drive shaft 5 and a helical gear 2, with the helical gear 2 fixedly mounted on the drive shaft 5. When the helical gear 2 and the worm gear 1 are assembled, the motor body 4 can drive the helical gear 2 and the worm gear 1 to mesh, thereby driving the drive shaft 5 to rotate around its own central axis.

[0126] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A motor assembly method for assembling a worm gear (1) and a helical gear (2), characterized in that, include: Fix the worm (1) and take a visual photograph of the worm (1) to obtain a first visual image; Calculate the first rotation angle based on the first visual image; Fix the helical gear (2) and take a visual photograph of the end face of the helical gear (2) to obtain a second visual image; The second rotation angle is calculated based on the standard helical gear image and the second visual image; The actual rotation angle of the helical gear (2) is calculated based on the first rotation angle and the second rotation angle; Move the helical gear (2) to a first set height position directly above the worm (1); control the helical gear (2) to rotate around its own central axis by the actual rotation angle; The helical gear (2) is moved vertically downwards to mesh with the worm (1); The specific steps for calculating the first rotation angle based on the first visual image include: Capture the position of a first bright spot (11) between adjacent helical teeth in a set area on the worm (1) in the first visual image; along the axial direction of the worm (1), calculate the distance between the center position of the first end face (121) of the first calibration helical tooth (12) of the worm (1) and the center position of the first bright spot (11), which is the first axial distance; calculate the distance between two adjacent first bright spots (11), which is the second axial distance; Obtain the standard axial spacing; The first rotation angle is calculated based on Δθ1=[Δx1*(360 / A)] / Δx2; where Δθ1 is the first rotation angle; Δx1 is the absolute value of the difference between the first axial spacing and the standard axial spacing; A is the number of teeth of the helical gear (2); and Δx2 is the second axial spacing.

2. The motor assembly method according to claim 1, characterized in that, The motor includes a motor housing (3) and a motor assembly, the motor assembly including a motor body (4) and a worm gear (1); The specific steps for fixing the worm (1) and taking a visual photograph of the worm (1) include: The worm gear (1) is assembled onto the motor body (4); The motor body (4) is assembled into the motor housing (3); The structure formed by the motor housing (3) and the motor assembly is placed in the dark chamber and the motor housing (3) is fixed in the dark chamber at the installation position; The light source and the first vision camera are both fixed directly above the worm gear (1); The light source illuminates the worm (1); The first vision camera takes a visual picture of the worm (1).

3. The motor assembly method according to claim 1, characterized in that, The specific steps for calculating the second rotation angle based on the standard helical gear image and the second visual image include: Obtain a standard helical gear image; Using the center of the end face of the standard helical gear in the standard helical gear image as the reference center, the center of the end face of the helical gear in the second visual image is made to coincide with the reference center; Using the reference center as the rotation center, rotate the helical gear (2) in the second visual image to make it coincide with the standard helical gear in the standard helical gear image; The rotation angle when the helical gear (2) in the second visual image coincides with the standard helical gear in the standard helical gear image is the second rotation angle.

4. The motor assembly method according to claim 1, characterized in that, The specific steps for calculating the actual rotation angle of the helical gear (2) based on the first rotation angle and the second rotation angle include: The actual rotation angle of the helical gear (2) is calculated based on Δθ = ±Δθ1 + Δθ2; Where Δθ is the actual rotation angle; Δθ1 is the first rotation angle; and Δθ2 is the second rotation angle.

5. The motor assembly method according to any one of claims 1-3, characterized in that, The motor includes a helical gear assembly, which includes a drive shaft (5) and a helical gear (2). The helical gear (2) is fixedly mounted on the drive shaft (5), and a limiting groove is provided at one end of the drive shaft (5) away from the helical gear (2). Between controlling the rotation of the helical gear (2) around its own central axis according to the actual rotation angle, and moving the helical gear (2) vertically downward to mesh with the worm (1), the following steps are also included: In the vertical direction, the limiting pin (100) is inserted from bottom to top into the limiting groove of the transmission shaft (5) and pressed against the inner bottom wall of the limiting groove.

6. The motor assembly method according to claim 5, characterized in that, The specific steps for moving the helical gear (2) vertically downwards to mesh with the worm (1) include: The helical gear assembly and the limiting pin (100) are driven to move synchronously downward along the vertical direction to the second set height position; Release the helical gear assembly; The limiting pin (100) is driven to move downward along the vertical direction until the helical gear (2) contacts the worm (1); The limiting pin (100) is moved downward along the vertical direction, so that the limiting pin (100) is separated from the inner bottom wall of the limiting groove and partially located in the limiting groove; at the same time, the helical gear (2) meshes with the worm (1) under its own gravity. Wherein, along the vertical direction, the height distance between the first set height position and the worm (1) is greater than the height distance between the second set height position and the worm (1).

7. The motor assembly method according to claim 6, characterized in that, The limiting groove includes a first groove and a second groove disposed on the inner peripheral wall of the first groove, and the limiting pin (100) can be inserted into the first groove and the second groove.

8. The motor assembly method according to claim 6, characterized in that, During the process of the helical gear (2) meshing with the worm (1) under its own gravity, the helical gear (2) applies a downward pressure to the helical gear assembly in the vertical direction; After the helical gear (2) and the worm (1) are engaged, the limiting pin (100) is pulled out of the limiting groove along the vertical direction to stop applying downward pressure to the helical gear assembly.

9. An electric motor, comprising a worm gear (1) and a helical gear (2), characterized in that, The worm (1) and the helical gear (2) are assembled using the motor assembly method according to any one of claims 1-8.

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