A flexible assembling mechanism for a three-in-one motor stator and rotor

Abstract

The present invention discloses a flexible assembly mechanism for a three-in-one motor stator and rotor, which includes a bracket, a bracket mounting plate, a turntable mounting plate, a guide rod mechanism, a positioning seat, and a plurality of clamping mechanisms; the clamping mechanisms are annularly and arrayedly distributed on the turntable mounting plate and are used for clamping the lower edge of the inner circle of the stator, the positioning seat is arranged in the middle of the upper end of the turntable mounting plate and is used for axially supporting the inner circle of the stator, the guide rod mechanism has a guide rod in contact with the inner circle of the rotor, the guide rod penetrates through the positioning seat and is driven by a second cylinder; wherein, the turntable mounting plate and the bracket mounting plate are rotationally connected through a turntable bearing to ensure the circumferential precise positioning of the rotor and the stator. The clamping mechanism is adopted to fix the motor stator, avoiding the up-and-down movement of the rotor caused by magnetic influence during the process of loading the rotor into the stator, and ensuring that the rotor and the stator are assembled in place after the rotor bearing is pressed into the stator; the stator is positioned by a diamond pin, and a floating turntable is added at the stator placement position to ensure the circumferential precise positioning of the rotor and the stator after the stator and the rotor are assembled.

Description

Technical Field

[0001] The present invention relates to the field of motor assembly equipment, and particularly relates to a flexible assembling mechanism for a stator and rotor of a three-in-one motor. Background Art

[0002] With the booming development of the new energy vehicle industry, the demand for new energy motors is increasing day by day, and the integrated design of motors will be the future development trend of new energy vehicles. Among them, the three-in-one motor is a typical example of integrated design and is increasingly favored by automobile manufacturers. The three-in-one motor is a technology that integrates an electric control unit, a motor, and a reducer into one. One of the difficulties is the increased difficulty of motor assembly caused by high integration. The three-in-one motor, like a common motor, also includes two components: a stator housing and a rotor. At the same time, the motor is directly connected to the reducer, and the overall size is larger than that of a common motor, making the stator-rotor assembly more difficult and requiring special assembly equipment.

[0003] New energy motors are generally permanent magnet synchronous motors. A large number of magnetic steel sheets are evenly distributed in the rotor, and the stator is generally a steel shell. The rotor has extremely strong magnetism. During the assembly process of the stator and rotor, the stator and rotor are extremely likely to attract each other, resulting in the rotor shaft being unable to accurately insert into the stator, causing improper installation.

[0004] Some of the existing stator-rotor assembly technologies use guiding devices to solve the problem of stator-rotor attraction in the radial direction, but they cannot effectively solve the problem of stator-rotor attraction in the axial direction. For example, in the patents "A non-contact permanent magnet generator stator-rotor assembly device" with application number 202011591400.6 and "A driving motor stator-rotor assembly tooling" with application number 202021650566.6. Some technologies fix the stator through a simple clamping device, but it is not applicable to stators with complex shell shapes. For example, in the patent "A single-air-gap type permanent magnet disk motor stator-rotor assembly tooling" with application number 202022083374.8.

[0005] Some technologies have set up a movable tray for placing the stator housing, which can place different types of stator housings, but there is no effective method to overcome the circumferential position error when placing the stator housing. For example, in the patent "A new energy motor stator housing and rotor assembly equipment" with application number 201810716136.0; some technologies have set up a circumferential positioning structure for the stator and rotor, but cannot achieve automatic adjustment of circumferential errors. For example, in the patent "Stator-rotor assembly machine" with application number 202022018827.9.

[0006] Therefore, the existing technology has basically solved the problem of the rotor being attracted and deflected in the radial direction due to magnetism during the stator-rotor assembly by adding an axial guiding structure during the stator-rotor assembly. However, since the guiding structure cannot solve the problem of magnetic attraction and axial movement of the stator, it may lead to improper installation of the rotor.

[0007] In the prior art, the stator is fixed by a simple clamping device, which solves the problem of the stator moving up and down due to magnetic attraction. However, it is not applicable to the stator housing with complex shapes. At the same time, simply clamping the stator housing tightly cannot solve the problem of the circumferential error that may occur when the stator is placed at the press-fitting position, and it is impossible to ensure the precise circumferential positioning of the rotor and the stator after the stator and rotor are assembled together. Summary of the Invention

[0008] To overcome the defects of the prior art, the purpose of the present invention is to provide a flexible assembling mechanism for the stator and rotor of a three-in-one motor, so as to solve the problems of the stator moving up and down due to magnetic attraction and the circumferential error that may occur when the stator is placed at the press-fitting position.

[0009] For this purpose, the present invention proposes a flexible assembling mechanism for the stator and rotor of a three-in-one motor, including a bracket, a bracket mounting plate, a turntable mounting plate, a guide rod mechanism, a positioning seat, and a plurality of clamping mechanisms; the clamping mechanisms are annularly and arrayedly distributed on the turntable mounting plate and are used to clamp the lower edge of the inner circle of the stator. The positioning seat is arranged in the middle of the upper end of the turntable mounting plate and is used to axially support the inner circle of the stator. The guide rod mechanism has a guide rod that contacts the inner circle of the rotor. The guide rod passes through the positioning seat and is driven by a second cylinder; wherein, the turntable mounting plate is rotationally connected to the bracket mounting plate through a turntable bearing to ensure the precise circumferential positioning of the rotor and the stator.

[0010] Further, a second fixed block is arranged on the turntable mounting plate, a first fixed block is arranged on the bracket mounting plate, and the first fixed block and the second fixed block are connected by a spring.

[0011] Further, the first fixed block and the second fixed block are also movably connected by bolts to adjust the maximum rotation amplitude of the turntable mounting plate.

[0012] Further, the clamping mechanism includes a claw, a claw mounting block, and a first cylinder. The first cylinder drives the claw to move radially outward to clamp the lower edge of the inner circle of the stator.

[0013] Further, a plurality of avoidance grooves for avoiding the claws are arranged on the positioning seat.

[0014] Further, at least two stator horizontal detection mechanisms are arranged on the turntable mounting plate. The stator horizontal detection mechanism includes a horizontal support rod and a contact sensor. The horizontal support rod has a movable component inside that contacts the stator. The contact sensor judges whether the stator is placed horizontally according to the movement of the movable component.

[0015] Further, a plurality of fixed support rods are arranged on the turntable mounting plate to support the motor housing outside the stator.

[0016] Further, a plurality of diamond pins are provided at the upper end of the positioning seat, and the diamond pins are used for circumferentially positioning the stator.

[0017] Further, a bushing cooperating with the guide rod is provided at the lower end of the bracket mounting plate.

[0018] Further, the second cylinder is arranged on the bracket, and the guide rod is connected to the second cylinder through a connecting member.

[0019] The flexible assembling mechanism for the three-in-one motor stator and rotor provided by the present invention uses a clamping mechanism to fix the motor stator, avoiding the up-and-down movement of the rotor caused by magnetic influence during the process of inserting the rotor into the stator, and ensuring that the rotor and stator are accurately assembled after the rotor bearing is pressed into the stator; the motor stator is positioned by positioning pins, and a floating turntable is added at the stator placement position, which can offset the circumferential position deviation when placing the stator, ensuring the accurate circumferential positioning of the rotor and the stator after the stator and rotor are assembled; the stator-rotor assembling equipment of the present invention is suitable for automated production and has high production efficiency.

[0020] In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0022] Figure 1 is a schematic three-dimensional structure diagram of the flexible assembling mechanism for the three-in-one motor stator and rotor of the present invention cooperating with the stator;

[0023] Figure 2 is a schematic structure diagram of the flexible assembling mechanism for the three-in-one motor stator and rotor of the present invention;

[0024] Figure 3 is an axonometric view of the flexible assembling mechanism for the three-in-one motor stator and rotor of the present invention;

[0025] Figure 4 is a sectional view taken along the A-A direction of the flexible assembling mechanism for the three-in-one motor stator and rotor of the present invention;

[0026] Figure 5 is a sectional view taken along the B-B direction of the flexible assembling mechanism for the three-in-one motor stator and rotor of the present invention.

[0027] DESCRIPTION OF THE REFERENCE NUMERALS

[0028] 1. Bracket mounting plate; 2. Turntable mounting plate; 3. Connecting block; 4. Cylinder 1; 5. Guide rail; 6. Jaw mounting block; 7. Jaw; 8. Positioning seat; 9. Fixed support rod; 10. Connecting piece; 11. Contact sensor; 12. Horizontal support rod; 13. Fixed block 1; 14. Spring; 15. Fixed block 2; 16. Guide rod; 17. Bolt; 18. Turntable bearing; 19. Cylinder 2; 20. Rotor; 21. Stator; 22. Bearing; 23. Bracket; 24. Diamond pin; 25. Bush; 26. Connecting piece. Detailed implementation mode

[0029] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] As Figures 1 to 5 shown, the flexible assembling mechanism for the stator and rotor of the three-in-one motor of the present invention includes: bracket 23, bracket mounting plate 1, turntable mounting plate 2, three groups of clamping mechanisms evenly distributed and installed on the turntable mounting plate 2, stator support mechanism, and guide rod mechanism.

[0031] Specifically, as Figure 2 , Figure 3 shown, the clamping mechanism is composed of jaw 7, jaw mounting block 6, connecting block 3 and cylinder 1. The cylinder 1 drives the jaw to move on the guide rail 5. When the jaw moves outwards, it clamps the lower edge of the inner circle of the stator 21.

[0032] The stator support mechanism is divided into three fixed support rods 9 and two stator horizontal detection mechanisms. The stator horizontal detection mechanism includes horizontal support rod 12, contact sensor 11 and connecting piece 10. The horizontal support rod 12 has a movable part that moves along the vertical direction inside, and a contact sensor 11 is installed on one side of the horizontal support rod 12 through the connecting piece 10.

[0033] The stator 21 is supported on the horizontal support rod 12 and pushes the movable part to move downwards. Whether the contact sensor 11 contacts the movable part is used to judge whether the stator 21 is placed horizontally, so that the central axis of the stator placed on the fixed support rod 9 is in the vertical direction and parallel to the central axis of the rotor 20. The fixed support rod 9 is used to support the motor housing outside the stator.

[0034] The turntable mounting plate 2 is rotatably connected to the bracket mounting plate 1 through the turntable bearing 18. The fixed block 2 15 is installed on the turntable mounting plate 2, and the fixed block 1 13 is installed on the bracket mounting plate 1. The fixed block 1 13 and the fixed block 2 15 are connected by a spring 14.

[0035] As Figure 4As shown, the bracket mounting plate 1 is mounted on the bracket 23. There is also a turntable bearing 18 between the turntable mounting plate 2 and the bracket mounting plate 1. When the stator 21 is placed on the fixed support rod 9, if the circumferential position is inaccurate, it will force the turntable mounting plate 2 to rotate, and then it will return to the accurate position due to the deformation recovery of the spring 14. Among them, the first fixing block 13 and the second fixing block 15 are also movably connected by bolts 17, and the maximum rotation amplitude of the turntable mounting plate 2 is adjusted by the bolts.

[0036] In the middle of the upper end of the turntable mounting plate 2, there is an annular positioning seat 8. Inside the positioning seat 8, there is a guide rod 16, and at the upper end of the positioning seat 8, there is a diamond pin 24; the bearing 22 has been installed on the rotor 20 before the rotor is inserted into the stator. The bearing 22 is not in direct contact with the equipment. The inner ring of the rotor contacts the guide rod 16, and the inner ring of the stator contacts the positioning seat 8. There are three avoidance grooves on the positioning seat 8 for avoiding the clamping jaws 7. The stator is positioned by means of the positioning seat 8 and the diamond pin 24, and the diamond pin 24 is used for circumferential positioning of the stator 21.

[0037] As Figure 5 shown, a second cylinder 19 is fixed on the bracket 23, and the guide rod 16 is connected to the second cylinder 19 through a connecting piece 26. There is a bushing 25 at the lower end of the bracket mounting plate 1, and the bushing 25 is slidably connected to the guide rod 16, and the up-and-down linear motion of the guide rod 16 is realized through the bushing 25.

[0038] It should be noted that the fixed support rod 9, the stator horizontal detection mechanism, and the clamping mechanism in the present invention are not limited to two or three shown in the figure, and can also be multiple, and can be evenly distributed on the turntable mounting plate 2.

[0039] In addition, the present invention is applied to the assembly of the stator and rotor of a three-in-one motor. Since the three-in-one motor is larger in size than a common motor, the present invention can also be adapted to the assembly of the stator and rotor of a common motor.

[0040] The working principle and working process of the flexible assembly mechanism of the stator and rotor of the three-in-one motor of the present invention will be briefly described below with reference to the accompanying drawings.

[0041] First, adjust the specific position of the fixed support rod 9 according to the structure of the stator housing. The manipulator grabs the stator 21 and places it on this equipment, and the stator 21 is horizontally placed by supporting it through the fixed support rod 9 and the horizontal support rod 12. If there is a circumferential error when the manipulator places the stator, since the turntable mounting plate 2 is floating, the support rod and the stator are still in correct contact, and then the turntable mounting plate 2 is corrected by the rebound of the spring 14 to offset the circumferential error when the stator is placed.

[0042] Then, the cylinder 1 drives the jaw 7 to move outwards to clamp the lower edge of the inner ring of the stator, and the guide rod 16 drives through the cylinder 2 and extends out through the positioning seat 8. The rotor 20 is pressed down into the stator 21 by the pneumatic actuator. First, the lower edge of the inner ring of the rotor 20 contacts the top of the guide rod 16 to ensure that the rotor 20 is not affected by magnetic attraction radially during the downward movement.

[0043] Finally, the rotor 20 and the guide rod 16 are slowly pressed into the stator 21 until the bearing 22 is completely pressed into the inner ring of the stator. After the stator and rotor are assembled, the guide rod 16 retracts downward, the jaw 7 releases, and the manipulator grabs the assembled motor.

[0044] Among them, the flexible assembly mechanism of the three-in-one motor stator and rotor of the present invention utilizes the following working principles:

[0045] (1) The stator is placed on the press-fitting station by the manipulator. Since the press-fitting station of this device has a floating turntable, the circumferential position error during the placement of the stator will be automatically offset.

[0046] (2) The three-piece jaws of the stator clamping device contact the lower edge of the inner ring at the bearing press-fitting position of the stator and clamp the stator.

[0047] (3) The bearing is pre-installed on the rotor and enters the press-fitting position, and the guide rod passes through the inner ring of the stator press-fitting bearing and extends upward.

[0048] (4) The electric actuator presses the rotor downward. When it contacts the rotor guide rod, the guide rod follows the downward press-fitting movement of the rotor.

[0049] (5) After the rotor smoothly enters the stator, the rotor bearing is pressed into the inner ring of the stator; the manipulator grabs the assembled motor.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flexible assembling mechanism for a three-in-one motor stator and rotor, characterized in that It includes a bracket (23), a bracket mounting plate (1), a turntable mounting plate (2), a guide rod mechanism, a positioning seat (8), and several clamping mechanisms; The clamping mechanisms are annularly and arrayedly distributed on the turntable mounting plate (2) and are used to clamp the lower edge of the inner ring of the stator (21). The positioning seat (8) is arranged in the middle of the upper end of the turntable mounting plate (2) and is used to axially support the inner ring of the stator (21). The guide rod mechanism has a guide rod (16) that contacts the inner ring of the rotor (20), and the guide rod (16) penetrates through the positioning seat (8) and is driven by a second cylinder (19); Among them, the turntable mounting plate (2) and the bracket mounting plate (1) are rotationally connected through a turntable bearing (18) to ensure the circumferential precise positioning of the rotor (20) and the stator (21). A second fixed block (15) is arranged on the turntable mounting plate (2), and a first fixed block (13) is arranged on the bracket mounting plate (1), and the first fixed block (13) and the second fixed block (15) are connected by a spring (14); At least two stator horizontal detection mechanisms are arranged on the turntable mounting plate (2). The stator horizontal detection mechanism includes a horizontal support rod (12) and a contact sensor (11). The horizontal support rod (12) has a movable part that contacts the stator (21), and the contact sensor (11) judges whether the stator (21) is placed horizontally according to the movement of the movable part.

2. The flexible assembly mechanism for the three-in-one motor stator and rotor according to claim 1, characterized in that, The first fixed block (13) and the second fixed block (15) are also movably connected by a bolt (17) to adjust the maximum rotation amplitude of the turntable mounting plate (2).

3. The flexible assembling mechanism for the combined stator and rotor of the three-in-one motor according to claim 1, characterized in that The clamping mechanism includes a jaw (7), a jaw mounting block (6), and a first cylinder (4). The first cylinder (4) drives the jaw (7) to move radially outward to clamp the lower edge of the inner ring of the stator (21).

4. The flexible assembling mechanism for the three-in-one motor stator and rotor according to claim 3, characterized in that, Several avoidance grooves for avoiding the jaws (7) are arranged on the positioning seat (8).

5. The flexible assembling mechanism for the three-in-one motor stator and rotor according to claim 1, characterized in that, Several fixed support rods (9) are arranged on the turntable mounting plate (2) and are used to support the motor housing outside the stator (21).

6. The flexible assembly mechanism for the three-in-one motor stator and rotor according to claim 1, characterized in that, Several diamond pins (24) are arranged at the upper end of the positioning seat (8), and the diamond pins (24) are used for circumferential positioning of the stator (21).

7. The flexible assembly mechanism of the three-in-one motor stator and rotor according to claim 1, characterized in that, A bushing (25) that cooperates with the guide rod (16) is arranged at the lower end of the bracket mounting plate (1).

8. The flexible assembly mechanism for the three-in-one motor stator and rotor according to claim 1, characterized in that, The second cylinder (19) is arranged on the bracket (23), and the guide rod (16) is connected to the second cylinder (19) through a connecting piece (26).

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