Automatic press fitting device of motor end cover and press fitting method of automatic press fitting device

Abstract

The invention relates to the technical field of motor press-fitting equipment, in particular to an automatic press-fitting device for a motor end cover, which comprises a base, and a jacking mechanism, a limiting mechanism, a press-fitting mechanism and a driving mechanism are sequentially arranged on the base from bottom to top. A motor end cover to be press-fitted is accommodated by the limiting mechanism, the motor end cover on the limiting mechanism is jacked by the jacking mechanism, the press-fitting mechanism is driven by the driving mechanism to move downwards, and the motor end cover is press-fitted onto a motor stator downwards by the press-fitting mechanism. The press-fitting mechanism comprises a pressure transmitting unit, a press-fitting unit located at the lower end of the pressure transmitting unit and a locking unit connecting the pressure transmitting unit and the press-fitting unit, the press-fitting unit comprises a press-fitting plate and a plurality of press-fitting rods, the pressure transmitting unit comprises a pressure transmitting plate, and the locking unit comprises a locking driving part, a locking buckle and a locking pin. The invention further provides a press fitting method of the motor end cover. According to the invention, the motor end cover and the motor stator can be accurately positioned, and automatic assembly of the electronic end cover can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of motor press-fitting equipment, and in particular provides an automatic press-fitting device for a motor end cover and a press-fitting method thereof. Background Art

[0002] The motor end cover is a cover installed on the motor casing to form a closed space inside the motor. At present, the assembly between the end cover of medium and large motors and the stator base generally adopts a stopper plus a transition fit or a small interference fit. During assembly, manual assembly is adopted, and the end is angularly positioned using a guide rod. After the stopper of the end cover enters the base, if the dead weight cannot overcome the interference, the end cover is assembled in place by tightening the bolts. The specific operation method is: place the stator base on the workbench in advance, screw the guide rod into the threaded hole on the stator end face, and then manually carry or hoist the end cover to the vicinity of the assembly surface of the stator base. After adjusting the angular position, pass the guide rod through the corresponding assembly hole of the end cover, and then assemble the end cover to the stator base. Align the end cover with the stator end face hole by visual observation, and then use a wrench with the process bolts to tighten the end cover to fit the stator end face.

[0003] The above-mentioned traditional operation method relies on the skills of employees, and requires a very slow operation process and careful observation to ensure that the end cover and the stator end surface holes are aligned correctly. At the same time, it is difficult to achieve automated assembly by using process bolts to tighten the end cover and the stator. In recent years, with the rapid development of intelligent manufacturing technology, the main manufacturing production lines of traction motors have gradually transformed and upgraded to automated and intelligent operations. Motor assembly is the core and most important assembly process of traction motors. The upgrade of its assembly operation mode is the focus of the current transformation of the motor manufacturing industry. The above-mentioned end cover assembly method obviously can no longer meet the requirements of automated assembly. In order to solve the above problems, the following patents in the prior art involve the automatic press-fitting of motor end covers: 1. The invention patent application with patent number "202311269908.8" and patent name "A motor end cover pressing device" includes a workbench and an abutment groove opened on the side wall of the workbench for the end cover body to slide into. A loading component for transporting a single end cover body into the abutment groove is provided on one side of the workbench. A pressing port for connecting to the abutment groove is opened through the workbench. A fixing component for fixing the motor body is provided at the bottom of the workbench. A pressing component for pressing the end cover body is provided on the workbench.

[0004] 2. The invention patent application with the patent number "202211545021.2" and the patent name "A vertical flexible fully automatic pressing device for a motor stator base and a rear end cover" includes an equipment body, an automatic assembly line is arranged inside the equipment body, both ends of the automatic assembly line pass through the equipment body, a robot is arranged on the side of one end of the automatic assembly line, a product pallet carrier is installed at the upper end of the automatic assembly line, a lifting and unloading mechanism is installed in the equipment body, a stator base positioning and transplanting mechanism is arranged at the left end of the equipment body, and a Z-axis pressing mechanism is arranged at the upper end of the equipment body.

[0005] The above-mentioned prior art can solve the problem that the assembly of the existing motor stator base and the end cover requires manual loading and unloading, which can improve the press-fitting efficiency of the motor end cover, save human resources, and avoid injuries to workers during handling. However, the structure of the prior art is relatively complex, and it is difficult to ensure the positioning accuracy of the end cover during press-fitting, and it is difficult to ensure the press-fitting efficiency and quality. Therefore, how to design an end cover press-fitting device that can achieve precise positioning of the end cover and the stator base, and realize efficient and automatic press-fitting of the motor end cover and the motor stator, is a problem that urgently needs to be solved. Summary of the invention

[0006] In order to solve the above problems, the present invention provides an automatic press-fitting device and a press-fitting method for a motor end cover, which can improve the press-fitting efficiency and press-fitting accuracy of the motor end cover and realize the automatic press-fitting of the motor end cover and the motor stator.

[0007] The present invention provides an automatic press-fitting device for a motor end cover, which specifically includes a base, on which a lifting mechanism, a limiting mechanism, a press-fitting mechanism and a driving mechanism are sequentially arranged from bottom to top; the motor end cover to be press-fitted is accommodated by the limiting mechanism, the motor end cover on the limiting mechanism is lifted by the lifting mechanism, the press-fitting mechanism is driven downward by the driving mechanism, and the motor end cover is press-fitted onto the motor stator by the press-fitting mechanism; the press-fitting mechanism includes a pressure transmission unit, a press-fitting unit located at the lower end of the pressure transmission unit, and a locking unit connecting the pressure transmission unit and the press-fitting unit, and the press-fitting unit includes a plurality of press-fitting rods.

[0008] Furthermore, the press-fitting rod includes a fixed rod and a telescopic rod; multiple press-fitting rods form multiple groups of press-fitting rod groups that match motor end covers of different specifications, and each group of press-fitting rod groups is distributed in a circle from the outside to the inside, and each group of press-fitting rod groups is composed of a fixed rod, or a telescopic rod, or a fixed rod and a telescopic rod.

[0009] Furthermore, the height of the press-fitting rods in each press-fitting rod group gradually decreases from the outside to the inside, that is, the height of the press-fitting rods in the outermost circle press-fitting rod group is the highest, and the height of the press-fitting rods in the innermost circle press-fitting rod group is the lowest; at least one press-fitting rod in each circle of press-fitting rod groups is provided with a spring pin at the bottom end, and during the press-fitting process, the spring pin extends into the positioning hole of the motor end cover to perform press-fitting positioning.

[0010] Furthermore, the press-fitting rods in the outermost circle press-fitting rod group are all in the form of fixed rods; the press-fitting rods in the innermost circle press-fitting rod group and the press-fitting rods in the press-fitting rod group between the outermost circle press-fitting rod group and the innermost circle press-fitting rod group can be in the form of fixed rods or telescopic rods, and the positions of the fixed rods and the telescopic rods are matched with the upper plane shape of each motor end cover to be press-fitted and are set accordingly.

[0011] Furthermore, the pressing unit also includes a pressing plate, and the pressing rod is connected to the lower end of the pressing plate; the pressure transmission unit includes a pressure transmission plate connected to the upper end of the pressing plate, a locking hole is provided on the pressure transmission plate, and a locking groove connected to the locking hole is provided on the pressing plate; the locking unit includes a locking driving member located at the upper end of the pressure transmission plate and a locking buckle located below the pressing plate, the power transmission rod of the locking driving member is passed through the locking hole and the locking groove and is connected to the locking buckle, and the locking buckle can rotate and abut against the lower end surface of the pressing plate to fasten the pressure transmission plate and the pressing plate.

[0012] Furthermore, the locking unit also includes a locking pin connected to the lower end of the pressure transmission plate and located on the inner side of the locking drive member, and a locking hole 2 is provided on the press-fit plate to match the locking pin.

[0013] Furthermore, the limiting mechanism includes a positioning plate for initially positioning the motor end cover to be pressed; a plurality of positioning platforms and positioning pins are provided on the upper end of the positioning plate, the center of the motor end cover is determined by the positioning platform, and the angular direction of the motor end cover is determined by the positioning platform and the positioning pins; the positioning platform includes a plurality of limiting steps of different heights to match the positioning requirements of motor end covers of different specifications.

[0014] Furthermore, the positions of each locating pin are set accordingly to match the positioning requirements of motor end covers of different specifications, and multiple locating pins are distributed in a ring shape and the centers of circles of each locating pin do not overlap; a telescopic head is provided at the upper end of each locating pin, and when the motor end cover is positioned, the telescopic head is inserted into the positioning hole of the motor end cover for positioning; for the same motor end cover, the positioning hole of the motor end cover into which the corresponding telescopic head is inserted is the same as the positioning hole into which the corresponding spring pin is inserted.

[0015] Furthermore, frame one, frame two and frame three are arranged above the base from bottom to top in sequence; the lifting mechanism is slidably arranged on frame one, and the positioning plate is slidably arranged on frame two; the driving mechanism is arranged on frame one, and the power output rod of the driving mechanism passes through frame one and is connected to the pressure transmission plate under frame one.

[0016] A method for press-fitting a motor end cover, wherein the motor end cover is press-fitted by the above-mentioned automatic press-fitting device, comprising the following steps: S1: Place the motor end cover to be press-fitted on the positioning plate, and use the corresponding limit steps and positioning pins to determine the center and angle of the motor end cover; place the motor stator on the lifting mechanism and place it co-centered with the lifting mechanism; S2: Slide the positioning plate on the second frame to slide the positioned motor end cover to the bottom of the press-fitting mechanism; S3: Slide the lifting mechanism on the frame 1 to the bottom of the positioning plate, drive the lifting mechanism to lift the motor end cover on the positioning plate upward, and remove the positioning plate from under the motor end cover; S4: Start the driving mechanism to apply a downward driving force to the pressure transmission plate, drive the pressing plate and the pressing rod to move downward and press against the motor end cover until the motor end cover is pressed onto the motor stator; while the driving mechanism applies the pressing force downward, the lifting mechanism needs to maintain the upward lifting force.

[0017] Compared with the prior art, the present invention can achieve the following beneficial effects: The press-fitting device and press-fitting method in the present invention can realize the automatic press-fitting of the motor end cover, and can also realize the automatic and rapid changeover of the press-fitting device through the design of the press-fitting rod and the press-fitting plate, which can ensure that the workstation can flexibly adapt to the automatic assembly of the motor end cover, improve the versatility of the device, and save assembly cost and assembly time.

[0018] The press-fitting device and press-fitting method of the present invention can realize the angular orientation and centering of the motor end cover assembly through the press-fitting rod, the press-fitting plate and the positioning plate, thereby improving the positioning accuracy between the motor end cover and the motor stator and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of a press-fitting device provided according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a driving mechanism and a pressing mechanism provided according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a press-fitting unit provided according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of a pressure transmission unit and a locking unit provided according to an embodiment of the present invention; Figure 5 Schematic diagram of the structure of a limiting mechanism provided according to an embodiment of the present invention.

[0020] The accompanying drawings include: base 1, lifting mechanism 2, limiting mechanism 3, pressing mechanism 4, driving mechanism 5, pressing rod 6, fixing rod 7, telescopic rod 8, spring pin 9, outermost circle pressing rod group 10, pressing plate 11, pressure transmission plate 12, locking groove 13, locking buckle 14, locking pin 15, locking hole 2 16, positioning plate 17, positioning platform 18, limiting step 19, positioning pin 20, telescopic head 21, frame one 22, frame two 23, frame three 24, locking drive 25, stop 26, U-shaped groove 27. DETAILED DESCRIPTION

[0021] In the following, reference will be made to the Figure 1-5 Embodiments of the present invention are described. In the following description, the same modules are represented by the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, the detailed description thereof will not be repeated.

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the following Figure 1-5 It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0023] An automatic press-fitting device for a motor end cover comprises a base 1, such as Figure 1 As shown, the base 1 is provided with a lifting mechanism 2, a limiting mechanism 3, a pressing mechanism 4 and a driving mechanism 5 from bottom to top, the limiting mechanism 3 is used to accommodate the motor end cover to be pressed, the lifting mechanism 2 is used to lift the motor end cover on the limiting mechanism 3, the driving mechanism 5 is used to drive the pressing mechanism 4 to move downward, and the pressing mechanism 4 is used to press the motor end cover downward onto the motor stator. Above the base 1, frame 1 22, frame 2 23 and frame 3 24 are provided from bottom to top, the lifting mechanism 2 is slidably provided on frame 1 22, the positioning plate 17 is slidably provided on frame 2 23, and the driving mechanism 5 is provided on frame 1 22.

[0024] like Figure 2 , Figure 3 As shown, the press-fitting mechanism 4 includes a pressure transmission unit, a press-fitting unit located at the lower end of the pressure transmission unit, and a locking unit connecting the pressure transmission unit and the press-fitting unit. The press-fitting unit includes a plurality of press-fitting rods 6 and a press-fitting plate 11. The press-fitting rods 6 are connected to the lower end of the press-fitting plate 11. The press-fitting rods 6 include fixed rods 7 and telescopic rods 8. The plurality of press-fitting rods 6 form a plurality of press-fitting rod groups matching motor end covers of different specifications. Each group of press-fitting rod groups is distributed in a circle from the outside to the inside. Each group of press-fitting rod groups is composed of fixed rods 7, or telescopic rods 8, or fixed rods 7 and telescopic rods 8.

[0025] The height of the press rods 6 in each press rod group gradually decreases from the outside to the inside, that is, the height of the press rods 6 in the outermost press rod group 10 is the highest, and the height of the press rods 6 in the innermost press rod group is the lowest. The outer diameter of the electronic end cover suitable for the inner circle is larger than the overall outer circle size of the press rod group of its outer circle, that is, the electronic end cover suitable for the inner circle can be accommodated in the press rod group of its outer circle without interference. At least one press rod 6 in each circle of press rod groups is provided with a spring pin 9 at the bottom end. During the press-fitting process, the spring pin 9 extends into the positioning hole of the motor end cover for press-fitting positioning. When the motor end cover is press-fitted into place, the spring pin 9 will withdraw from the positioning hole of the motor end cover.

[0026] The press-fitting rods 6 in the outermost circle press-fitting rod group 10 are all in the form of fixed rods 7 to match the press-fitting requirements of the motor end cover with a larger outer diameter. The press-fitting rods 6 in the innermost circle press-fitting rod group and the press-fitting rods 6 in the press-fitting rod group between the outermost circle press-fitting rod group 10 and the innermost circle press-fitting rod group can be in the form of fixed rods 7 or telescopic rods 8. The positions of the fixed rods 7 and the telescopic rods 8 are matched with the upper plane shapes of each motor end cover to be press-fitted and are set accordingly.

[0027] In a specific application, the best implementation is: each circle of press-fitting rod groups is set corresponding to a motor end cap, and the height of the press-fitting rods in each circle of press-fitting rod groups is kept consistent. If the press-fitting rod group includes both fixed rods 7 and telescopic rods 8, the height of the telescopic rods 8 after extension is kept consistent with that of the fixed rods 7. However, in order to match certain special-shaped motor end caps, fixed rods 7 or telescopic rods 8 can also be set in different circles of press-fitting rod groups to match the press-fitting requirements of special-shaped motor end caps. Those skilled in the art can make adaptive designs according to the actual shapes of the end caps.

[0028] like Figure 3 , Figure 4 As shown, the pressure transmission unit includes a pressure transmission plate 12 connected to the upper end of the pressing plate 11, and the power output rod of the driving mechanism 5 passes through the frame 22 and is connected to the pressure transmission plate 12 below the frame 22. The pressure transmission plate 12 transmits the pressing power of the driving motor to the pressing unit. A locking hole 1 is provided on the pressure transmission plate 12, and a locking groove 13 connected to the locking hole 1 is provided on the pressing plate 11. The locking unit includes a locking driving member 25 located at the upper end of the pressure transmission plate 12 and a locking buckle 14 located below the pressing plate 11. The power transmission rod of the locking driving member 25 is passed through the locking hole 1 and the locking groove 13 and is connected to the locking buckle 14. The locking buckle 14 can rotate and abut against the lower end surface of the pressing plate 11 to fasten the pressure transmission plate 12 and the pressing plate 11. The locking groove 13 can accommodate the power output rod of the locking driving member 25 to avoid interference, so that the locking buckle 14 and the pressing plate 11 have a larger contact area, thereby improving the locking force. The locking unit also includes a locking pin 15 connected to the lower end of the pressure transmission plate 12 and located on the inner side of the locking drive member 25. A locking hole 16 is provided on the pressing plate 11 to match the locking pin 15. The locking pin 15 further improves the stability of the connection between the pressing plate 11 and the pressure transmission plate 12.

[0029] like Figure 5As shown, the limiting mechanism 3 includes a positioning plate 17, which is used to initially position the motor end cover to be pressed, specifically to determine the center and angle of the motor end cover. A U-shaped groove 27 is provided on the positioning plate 17 so that the power output head of the lifting mechanism 2 can pass through and lift the motor end cover. A plurality of positioning platforms 18 and positioning pins 20 are provided on the upper end of the positioning plate 17. The positioning platform 18 determines the center of the motor end cover, and the positioning platform 18 and the positioning pins 20 cooperate to determine the angle of the motor end cover. The positioning platform 18 includes a plurality of limiting steps 19 of different heights to match the positioning requirements of motor end covers of different specifications.

[0030] The positions of the positioning pins 20 are set accordingly to match the positioning requirements of motor end covers of different specifications. The multiple positioning pins 20 are distributed in a ring shape and the centers of the circles of the positioning pins 20 do not overlap. Each positioning pin 20 is set to match a click end cover. A telescopic head 21 is provided at the upper end of each positioning pin 20. When positioning the motor end cover, the telescopic head 21 extends into the positioning hole of the motor end cover for positioning. For the same motor end cover, the positioning hole of the motor end cover into which the corresponding telescopic head 21 extends is the same as the positioning hole into which the corresponding spring pin 9 extends.

[0031] A method for press-fitting a motor end cover, wherein the motor end cover is press-fitted by the automatic press-fitting device of claim 9, comprising the following steps: S1: Place the motor end cover to be pressed on the positioning plate 17, and use the corresponding limiting steps 19 and positioning pins 20 to determine the center and angle of the motor end cover. Select the corresponding limiting steps 19 for limiting according to the outer diameter of the motor end cover. Place the motor stator at the lifting mechanism 2 and place it coaxially with the lifting mechanism 2. The motor stator is specifically placed at Figure 1 In the position shown at A, when the lifting mechanism 2 lifts the motor end cover upward, the motor stator does not move.

[0032] S2: Slide the positioning plate 17 on the frame 2 23 to slide the positioned motor end cover to below the press-fitting mechanism 4 .

[0033] S3: Slide the lifting mechanism 2 on the frame 1 22 to below the positioning plate 17 ( Figure 1 2 is the state before the lifting mechanism 2 slides to the bottom of the positioning plate 17), the lifting mechanism 2 is driven to lift the motor end cover on the positioning plate 17 upward, and the motor end cover is lifted by the power output head of the lifting mechanism 2 shown in B through the U-shaped groove 27 of the positioning plate 17, and then the positioning plate 17 is moved away from under the motor end cover.

[0034] S4: Start the driving mechanism 5 to apply a downward driving force to the pressure transmission plate 12, drive the pressing plate 11 and the pressing rod 6 to move downward and press toward the motor end cover, until the pressing rod 6 presses the motor end cover and presses the motor end cover onto the motor stator. While the driving mechanism 5 applies the pressing force downward, the lifting mechanism 2 needs to maintain an upward lifting force. During the pressing process, the driving force of the driving mechanism 5 becomes larger and larger, and the lifting force of the lifting mechanism 2 becomes smaller and smaller, but it is necessary to maintain the driving force of the driving mechanism 5 and the lifting force of the lifting mechanism 2 at the same time.

[0035] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0036] The above specific implementations of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An automatic press-fitting device for a motor end cover, characterized in that: The invention comprises a base (1), on which a lifting mechanism (2), a limiting mechanism (3), a pressing mechanism (4) and a driving mechanism (5) are arranged in order from bottom to top; the limiting mechanism (3) accommodates a motor end cover to be pressed, the lifting mechanism (2) lifts the motor end cover on the limiting mechanism (3), the driving mechanism (5) drives the pressing mechanism (4) to move downward, and the pressing mechanism (4) presses the motor end cover downward onto the motor stator; the pressing mechanism (4) comprises a pressure transmission unit, a pressing unit located at the lower end of the pressure transmission unit, and a locking unit connecting the pressure transmission unit and the pressing unit, and the pressing unit comprises a plurality of pressing rods (6).

2. The automatic press-fitting device for the motor end cover according to claim 1, characterized in that: The press-fitting rod (6) comprises a fixed rod (7) and a telescopic rod (8); a plurality of press-fitting rods (6) form a plurality of press-fitting rod groups matching motor end covers of different specifications, each press-fitting rod group being arranged in a circle from the outside to the inside, and each press-fitting rod group is composed of a fixed rod (7), or a telescopic rod (8), or a fixed rod (7) and a telescopic rod (8).

3. The automatic press-fitting device for the motor end cover according to claim 2, characterized in that: The height of the press rods (6) in each press rod group gradually decreases from the outside to the inside, that is, the height of the press rods (6) in the outermost press rod group (10) is the highest, and the height of the press rods (6) in the innermost press rod group is the lowest; at least one press rod (6) in each press rod group is provided with a spring pin (9) at the bottom end, and during the press-fitting process, the spring pin (9) extends into the positioning hole of the motor end cover to perform press-fitting positioning.

4. The automatic press-fitting device for the motor end cover according to claim 3, characterized in that: The press-fitting rods (6) in the outermost press-fitting rod group (10) are all in the form of fixed rods (7); the press-fitting rods (6) in the innermost press-fitting rod group and the press-fitting rods (6) in the press-fitting rod group between the outermost press-fitting rod group (10) and the innermost press-fitting rod group can be in the form of fixed rods (7) or telescopic rods (8), and the positions of the fixed rods (7) and the telescopic rods (8) are set accordingly to match the upper plane shape of each motor end cover to be press-fitted.

5. The automatic press-fitting device for the motor end cover according to claim 4, characterized in that: The press-fitting unit further comprises a press-fitting plate (11), and a press-fitting rod (6) is connected to the lower end of the press-fitting plate (11); the pressure transmission unit comprises a pressure transmission plate (12) connected to the upper end of the press-fitting plate (11), a locking hole 1 is formed on the pressure transmission plate (12), and a locking groove (13) connected to the locking hole 1 is formed on the press-fitting plate (11); the locking unit comprises a locking driving member (25) located at the upper end of the pressure transmission plate (12) and a locking buckle (14) located below the press-fitting plate (11), a power transmission rod of the locking driving member (25) is passed through the locking hole 1 and the locking groove (13) and is connected to the locking buckle (14), and the locking buckle (14) can rotate and abut against the lower end surface of the press-fitting plate (11) to fasten the pressure transmission plate (12) and the press-fitting plate (11).

6. The automatic press-fitting device for the motor end cover according to claim 5, characterized in that: The locking unit further comprises a locking pin (15) connected to the lower end of the pressure transmission plate (12) and located inside the locking drive member (25); a second locking hole (16) is provided on the press plate (11) to match the locking pin (15).

7. The automatic press-fitting device for the motor end cover according to claim 6, characterized in that: The limiting mechanism (3) comprises a positioning plate (17) for initially positioning the motor end cover to be pressed; a plurality of positioning platforms (18) and positioning pins (20) are provided at the upper end of the positioning plate (17); the positioning platform (18) is used to determine the center of the motor end cover, and the positioning platform (18) and the positioning pins (20) cooperate to determine the angular direction of the motor end cover; the positioning platform (18) comprises a plurality of limiting steps (19) of different heights to match the positioning requirements of motor end covers of different specifications.

8. The automatic press-fitting device for the motor end cover according to claim 7, characterized in that: The positions of the positioning pins (20) are set accordingly to match the positioning requirements of motor end covers of different specifications. The plurality of positioning pins (20) are distributed in a ring shape and the centers of the circles of the positioning pins (20) do not overlap. The upper end of each positioning pin (20) is provided with a telescopic head (21). When positioning the motor end cover, the telescopic head (21) extends into the positioning hole of the motor end cover for positioning. For the same motor end cover, the positioning hole of the motor end cover into which the corresponding telescopic head (21) extends is the same as the positioning hole into which the corresponding spring pin (9) extends.

9. The automatic press-fitting device for the motor end cover according to claim 8, characterized in that: A frame body 1 (22), a frame body 2 (23) and a frame body 3 (24) are arranged above the base (1) from bottom to top; the lifting mechanism (2) is slidably arranged on the frame body 1 (22), and the positioning plate (17) is slidably arranged on the frame body 2 (23); the driving mechanism (5) is arranged on the frame body 1 (22), and the power output rod of the driving mechanism (5) passes through the frame body 1 (22) and is connected to the pressure transmission plate (12) below the frame body 1 (22).

10. A method for press-fitting a motor end cover, wherein the motor end cover is press-fitted by the automatic press-fitting device according to claim 9, characterized in that: The steps include: S1: placing the motor end cover to be press-fitted on the positioning plate (17), and aligning the center and angle of the motor end cover by means of corresponding limit steps (19) and positioning pins (20); placing the motor stator on the lifting mechanism (2) and co-centering with the lifting mechanism (2); S2: Slide the positioning plate (17) onto the second frame (23) to slide the positioned motor end cover to the bottom of the press-fitting mechanism (4); S3: Sliding the lifting mechanism (2) on the frame body (22) to below the positioning plate (17), driving the lifting mechanism (2) to lift the motor end cover on the positioning plate (17) upward, and removing the positioning plate (17) from below the motor end cover; S4: starting the driving mechanism (5) to apply a downward driving force to the pressure transmission plate (12), driving the pressing plate (11) and the pressing rod (6) to move downward and press against the motor end cover until the motor end cover is pressed onto the motor stator; while the driving mechanism (5) applies the pressing force downward, the lifting mechanism (2) needs to maintain an upward lifting force.

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