A motor stator press mounting base positioning device

Abstract

The application provides a motor stator press-fitting machine base positioning device and belongs to the technical field of motor assembly. The device solves the problems of poor adaptability and low efficiency of the existing stator press-fitting device. The device comprises a motor speed reducer, a transmission gear, a reversing gear, a rack, a sliding block, a guide rail, a plurality of machine base positioning modules and a bottom plate. The plurality of machine base positioning modules and the guide rail are installed on the bottom plate. The plurality of machine base positioning modules are combined to press-fit and position the motor machine base. The machine base positioning module is installed on the guide rail. The motor speed reducer drives the transmission gear to rotate. The transmission gear is engaged with the reversing gear. The reversing gear is engaged with the rack. The rack moves linearly along the guide rail. The end is fixed with the sliding block. Then the sliding block and the machine base positioning module are pulled to move. The opening and closing of the positioning clamping jaw are realized through the automatic control of the motor speed reducer. The manual positioning is replaced. The positioning time of single machine base stator press-fitting is shortened by more than 50% compared with the traditional mode. The production efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of motor assembly technology, and in particular relates to a positioning device for a motor stator press-fitting machine base, which can be used for motor stator press-fitting. Background Technology

[0002] In the motor manufacturing industry, stator pressing is a crucial step in motor assembly. When pressing the stator, the motor frame must first be placed in the designated position. Since some winding core coils extend beyond the frame's stop, the frame must be placed on a lower shim to elevate the stop and ensure smooth pressing of the windings without damage. Currently, this is done manually. When different specifications of motor frames need to be pressed, different lower shims must be manually changed, which has the following drawbacks: First, the existing base positioning device is a special structure that is only compatible with a single type of motor base. Changing the specifications requires changing the tooling, which has poor versatility and increases equipment costs and storage burden. Secondly, manually changing positioning fixtures is time-consuming and labor-intensive. For large machine bases, there are safety hazards such as squeezing and bumping during fixture handling and installation. Third, the storage and retrieval of tooling is cumbersome, and finding suitable tooling takes a long time, resulting in low production efficiency. Therefore, the development of a highly adaptable and efficient motor stator press-fitting positioning device has become an urgent need in the industry. Summary of the Invention

[0003] In view of this, in order to solve the problems of poor adaptability and low efficiency of existing stator press-fitting devices, this invention proposes a motor stator press-fitting machine base positioning device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a motor stator press-fitting base positioning device, comprising a motor reducer, transmission gears, reversing gears, racks, sliders, guide rails, several base positioning modules, and a base plate. A guide rail is mounted on the base plate, and the base positioning module is mounted on the guide rail. The base positioning module is fixed on the slider, and several base positioning modules are arranged together to press and position the motor base. The motor reducer drives the transmission gear to rotate. The transmission gear meshes with the reversing gear, which in turn meshes with the rack. The rack moves linearly along the guide rail, and its end is fixed to the slider, thereby pulling the slider and the machine base positioning module to move.

[0005] Preferably, the base positioning module includes a positioning claw and a support platform, the support platform being fixed above the slider, and the positioning claw and the support platform being fastened together by bolts.

[0006] Preferably, the positioning claw has an arc-shaped structure, with its inner side conforming to the inner curved surface of the machine base stop.

[0007] Preferably, there are 4 or 5 positioning claws.

[0008] Preferably, the tail of the positioning claw is an integral structure with the slider, and it opens and closes radially with the linear movement of the slider, adapting to motor bases with different inner diameters.

[0009] Preferably, the base plate is equipped with several stroke detection devices, which correspond to the inner and outer limit stroke positions of the slider respectively.

[0010] Preferably, when the slider moves to its limit position, the stroke detection device sends a signal to the control system of the motor reducer, and the motor reducer automatically stops to prevent the positioning claw from overtraveling and damaging the machine base stop.

[0011] Preferably, the slider has symmetrical racks fixed to its left and right sides by bolts, and the racks, slider and positioning claws are an integral structure.

[0012] Preferably, the rack, slider, and positioning claw form at least two sets of opposing integral structures. The transmission gear and reversing gear are configured such that when the motor reducer drives the transmission gear to rotate, the meshing transmission of the reversing gear drives the racks of the two opposing integral structures to move synchronously outward or inward, thereby realizing the synchronous opening and closing of the positioning claw.

[0013] Preferably, the motor reducer is a servo motor reducer, which can detect the output torque and automatically stop the motor when the torque reaches the set value.

[0014] A positioning method for a motor stator press-fitting machine base positioning device includes the following steps: Step 1: Parameter setting: Based on the inner diameter specification of the machine base, the system converts it into the number of revolutions of the motor reducer, thus completing the initial parameter setting; Step 2: Preliminary positioning: Press the start button, the motor reducer drives the transmission gear to rotate, and the reversing gear drives the rack to move linearly along the guide rail. The rack pulls the slider and the positioning claw to move outward synchronously until the arc surface of the positioning claw reaches the set value, thus achieving radial preliminary positioning; Step 3: Base loading: The motor base is transported to the top by a robotic arm and slowly lowered onto the support platform to ensure the base's posture, thus completing the base loading. Step 4: Precise positioning: The servo motor continues to drive the gear to rotate, which in turn moves the rack. The rack then drives the positioning chuck to expand until the set value is reached. Step 5: Stator pressing: Start the external pressing equipment and press the winding into the machine base along the lower tire axis. The positioning claws and the lower tire support platform together limit the radial and axial displacement of the lower tire of the machine base and control the coaxiality error between the stator and the machine base. Step 6: Reset and Unloading: After the stator is pressed, the control system controls the motor reducer to run in reverse, driving the transmission gear, reversing gear and rack to move in the opposite direction. The slider drives the positioning claw to move inward to reset. The robot arm removes the pressed stator assembly from the lower die, completing one pressing operation.

[0015] Compared with the prior art, the beneficial effects of the motor stator press-fitting base positioning device of the present invention are: 1. High positioning accuracy: The closed-loop control of the servo motor reducer and the rigid transmission of the gear rack ensure high radial positioning accuracy of the positioning claws. Combined with the support platform, it controls the coaxiality error between the winding core and the machine base, greatly improving the pressing quality of the stator.

[0016] 2. High adaptability: The positioning jaws can achieve radial opening and closing through the linear movement of the slider, covering the inner diameter of the motor base stop in the range of φ250mm~φ454mm, without the need to change tooling, thus reducing the cost of production equipment.

[0017] 3. Good structural stability: The small clearance fit between the precision guide rail and the slider, combined with the chamfered positioning claws, effectively prevents the slippage and deflection of the machine base during the pressing process, ensuring the stability of the pressing process.

[0018] 4. High degree of automation: The opening and closing of the positioning claws is realized through the automatic control of the motor reducer, replacing manual positioning. The positioning time of the stator press-fitting of a single machine base is reduced by more than 50% compared with the traditional method, thus improving production efficiency. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the motor stator press-fitting base positioning device according to the present invention; In the diagram: 1-Motor reducer, 2-Transmission gear, 3-Reversing gear, 4-Rack, 5-Slider, 6-Guide rail, 7-Support platform, 8-Positioning claw, 9-Base plate, 11-Integral structure No. 1, 12-Integral structure No. 2, 13-Integral structure No. 3, 14-Integral structure No. 4, 15-Transmission gear No. 1, 16-Transmission gear No. 2, 17-Reversing gear No. 1, 18-Reversing gear No. 2. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the drawings, and not all of them. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the invention.

[0021] See Figure 1 This embodiment describes a motor stator press-fitting base positioning device, which includes seven core components: a motor reducer 1, a transmission gear 2, a reversing gear 3, a rack 4, a slider 5, a guide rail 6, a base plate 9, and a base positioning module.

[0022] The motor reducer 1 is a servo motor reducer, which can detect the output torque and automatically stop the motor when the torque reaches the set value.

[0023] Both the transmission gear 2 and the reversing gear 3 are made of alloy structural steel and have undergone carburizing, quenching, and grinding. They mesh as gears. The reversing gear 3 is mounted on the base plate shaft via a precision bearing and meshes with the transmission gear 2 to transmit power. It also meshes with the rack 4 to convert rotational power into linear power. The base plate shaft is not shown in the diagram; it is a standard component used to fix the bearings and gears.

[0024] The rack 4 is a hardened linear rack with ground tooth surfaces, and is set along the direction of the guide rail 6. The end is fixed to the slider 5 by bolts. The slider 5 is an alloy machined part with a T-slot at the bottom to fit the guide rail 6. The top of the slider 5 is equipped with an oil injection groove to reduce sliding friction loss through oil lubrication and ensure the smooth movement of the slider 5.

[0025] The machine base positioning module includes positioning claws 8 and support platform 7, which are fastened together by bolts. The support platform 7 is fixed above the slider 5 and serves to support the machine base. The positioning claws 8 have an arc-shaped structure, with their inner sides conforming to the inner curved surface of the machine base stop. There are four claws in total, and they are evenly distributed in the circumferential direction. The arc-shaped surface of the positioning claws 8 is chamfered to prevent them from bumping against the machine base stop during the feeding process. The tail of the positioning claws 8 is an integral structure with the slider 5, and it opens and closes radially with the linear movement of the slider 5, adapting to motor bases with different inner diameters.

[0026] The base plate 9 is a precision-machined part with a milled and ground surface, serving as the basic load-bearing component of the device. Guide rails 6 are machined on the base plate 9 to guide the linear motion of the slider 5; the surface of the guide rails 6 is hardened. The motor reducer 1 is fixed to the underside of the base plate 9, and its reduction ratio can be selected according to positioning requirements. Its output shaft is coaxially connected to the transmission gear 2 via a coupling, providing precise rotational power to the transmission system. The motor reducer 1 uses a servo motor paired with the reducer, capable of detecting torque. When the torque reaches a certain value, the motor automatically stops to prevent damage to the machine base.

[0027] The base plate 9 is equipped with a stroke detection device, which corresponds to the inner and outer limit stroke positions of the slider 5. When the slider 5 moves to the limit position, the stroke detection device sends a signal to the control system of the motor reducer, and the motor reducer automatically stops to prevent the positioning claw 8 from over-travel and damaging the machine base stop.

[0028] The rack 4, slider 5, and positioning claw 8 form at least two sets of opposing integral structures. The transmission gear 2 and reversing gear 3 are configured such that when the motor reducer drives the transmission gear to rotate, the meshing transmission of the reversing gear drives the racks of the two opposing integral structures to move synchronously outward or inward, thereby realizing the synchronous opening and closing of the positioning claw.

[0029] Specifically, symmetrical racks 4 are fixed to the left and right sides of the slider 5 by bolts. The racks 4, slider 5, and positioning claws 8 form an integral structure (11, 12, 13, 14). Among them, integral structure 11 and integral structure 13 are arranged opposite each other, and integral structure 12 and integral structure 14 are arranged opposite each other. Integral structure 11, integral structure 12, integral structure 13, and integral structure 14 are arranged counterclockwise.

[0030] When the motor drives the gear to rotate, the rotation of the gear causes the rack 4 to expand, and the first integral structure 11 and the second integral structure 12 move outward accordingly. The left rack 4 of the first integral structure 11 drives the first transmission gear 15 to rotate clockwise, and the right rack of the second integral structure 12 drives the second transmission gear 16 to rotate counterclockwise. Through the first reversing gear 17 and the second reversing gear 18, the racks 4 of the third integral structure 13 and the fourth integral structure 14 move outward, thereby causing the third integral structure 13 and the fourth integral structure 14 to move outward. This achieves the positioning of the integral structures 11, 12, 13 and 14 by moving outward. The reverse is also true.

[0031] The present invention also discloses a method for positioning a motor stator press-fitting base based on the above-mentioned device, comprising the following steps: 1. Parameter setting: Based on the inner diameter specification of the machine base, the system converts it into the number of revolutions of the motor reducer 1, thus completing the initial parameter setting.

[0032] 2. Preliminary positioning: Press the start button, the motor reducer 1 drives the transmission gear 2 to rotate, and the reversing gear 3 drives the rack 4 to move linearly along the guide rail 6. The rack 4 pulls the slider 5 and the positioning claw 8 to move outward synchronously until the arc surface of the positioning claw 8 reaches the set value, thus achieving radial preliminary positioning.

[0033] 3. Base loading: The motor base is transported to the upper part by a robotic arm and slowly lowered to the support platform 7 to ensure the posture of the base and complete the base loading.

[0034] 4. Precise positioning: The servo motor continues to drive the gear to rotate, which in turn moves the rack 4. The rack 4 then drives the positioning claw 8 to expand until the set value is reached.

[0035] 5. Stator pressing: Start the external pressing equipment to press the winding into the machine base along the lower tire axis. The positioning claw 8 and the lower tire support platform together restrict the radial and axial displacement of the lower tire of the machine base, and control the coaxiality error between the stator and the machine base.

[0036] 6. Reset and unloading: After the stator is pressed, the control system controls the motor reducer 1 to run in reverse, driving the transmission gear 2, reversing gear 3 and rack 4 to move in opposite directions. The slider 5 drives the positioning claw 8 to move inward to reset. The robot arm removes the pressed stator assembly from the lower die, completing one pressing operation.

[0037] Example 1 A positioning device for a motor stator press-fitting base includes a base plate 9 made of 45 steel with dimensions of 600mm×600mm×50mm; a motor reducer 1 consisting of a servo motor and a reducer; a transmission gear 2 and a reversing gear 3 with 25 and 35 teeth respectively, meshing with each other; a rack 4 made of hardened and ground rack with a tooth pitch of 6.28mm and a tooth pitch error of 0.008mm; a clearance of 0.2mm between the slider 5 and the guide rail 6; and four positioning claws 8 with arc-shaped surfaces adapted to motor bases ranging from φ250mm to φ454mm, with positioning pins to ensure their fixing accuracy.

[0038] The positioning and pressing method in this embodiment is as follows: 1. The target displacement of the positioning claw 8 is set to 325mm by the control system. The system calculates the angle that the motor needs to rotate and first reaches the preset value of 320mm.

[0039] 2. Place the motor base with a stop diameter of φ325mm on the lower tire to complete the initial positioning.

[0040] 3. Start the motor reducer 1, drive the transmission gear 2 to rotate, and drive the rack 4 and slider 5 to slide through the reversing gear 3. The positioning claw 8 moves outward to fit against the outer wall of the tire under the machine base, completing the precise positioning.

[0041] 4. Start the pressing equipment and press the winding into the machine base.

[0042] 5. After pressing is completed, remove the stator, the motor reducer 1 will rotate in reverse, and the positioning claw 8 will reset.

[0043] Example 2 The difference between this embodiment and embodiment 1 is that there are 5 positioning claws 8, which are evenly distributed around the lower tire support platform. The arc-shaped surface of the claws can be adapted to the inner wall of the base with different curvatures by replacing the wear-resistant pads. The positioning press-fitting method of this embodiment is the same as that of embodiment 1, and the adaptability and positioning stability are further improved.

[0044] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A positioning device for a motor stator press-fitting machine base, characterized in that: It includes a motor reducer (1), transmission gear (2), reversing gear (3), rack (4), slider (5), guide rail (6), several base positioning modules and base plate (9). A guide rail (6) is installed on the base plate (9), and the base positioning module is installed on the guide rail (6). The base positioning module is fixed on the slider (5). Several base positioning modules are arranged together to press and position the motor base. The motor reducer (1) drives the transmission gear (2) to rotate. The transmission gear (2) meshes with the reversing gear (3). The reversing gear (3) meshes with the rack (4). The rack (4) moves linearly along the guide rail (6). Its end is fixed to the slider (5), thereby pulling the slider (5) and the base positioning module to move. The base positioning module includes a positioning claw (8) and a support platform (7). The support platform (7) is fixed above the slider (5), and the positioning claw (8) and the support platform (7) are fixedly connected. The positioning claw (8) has an arc-shaped structure, and its inner side is in contact with the inner curved surface of the machine base stop. The motor reducer (1) is a servo motor reducer, which can detect the output torque and automatically stop the motor when the torque reaches the set value.

2. The motor stator press-fitting machine base positioning device according to claim 1, characterized in that: The positioning claws (8) are 4 or 5 in number.

3. The motor stator press-fitting machine base positioning device according to claim 1, characterized in that: The tail of the positioning claw (8) is an integral structure with the slider (5), and it opens and closes radially with the linear movement of the slider (5), adapting to motor bases with different inner diameters.

4. The motor stator press-fitting machine base positioning device according to claim 1, characterized in that: Several stroke detection devices are installed on the base plate (9), which correspond to the inner and outer limit stroke positions of the slider (5).

5. The motor stator press-fitting machine base positioning device according to claim 4, characterized in that: When the slider (5) moves to the limit position, the stroke detection device sends a signal to the control system of the motor reducer, and the motor reducer stops automatically to prevent the positioning claw (8) from over-travel and damaging the machine base stop.

6. The motor stator press-fitting machine base positioning device according to claim 1, characterized in that: The slider (5) has symmetrical racks (4) fixed to its left and right sides by bolts.

7. The motor stator press-fitting machine base positioning device according to claim 6, characterized in that: The rack (4), slider (5) and positioning claw (8) form at least two sets of relatively arranged integral structures. The transmission gear (2) and reversing gear (3) are configured such that when the motor reducer drives the transmission gear to rotate, the meshing transmission of the reversing gear drives the racks of the two relatively arranged integral structures to move outward or inward synchronously, thereby realizing the synchronous opening and closing of the positioning claw.

8. A positioning method for a motor stator press-fitting machine base positioning device as described in any one of claims 1-7, characterized in that: Includes the following steps: Step 1: Parameter setting: Based on the inner diameter specification of the machine base, the system is converted into the number of rotations of the motor reducer (1) to complete the initial parameter setting; Step 2: Preliminary positioning: Press the start button, the motor reducer (1) drives the transmission gear (2) to rotate, and through the reversing gear (3) drives the rack (4) to move linearly along the guide rail (6). The rack (4) pulls the slider (5) and the positioning claw (8) to move outward synchronously until the arc surface of the positioning claw (8) reaches the set value, thus achieving radial preliminary positioning; Step 3: Loading the machine base: The motor base is transported to the top by the robot arm and slowly lowered to the support platform (7) to ensure the posture of the machine base and complete the loading of the machine base; Step 4: Precise positioning: The servo motor continues to drive the gear to rotate, which in turn drives the rack (4) to move. The rack (4) drives the positioning claw (8) to expand until the set value is reached; Step 5: Stator pressing: Start the external pressing equipment and press the winding into the machine base along the lower tire axis. The positioning claw (8) and the lower tire support platform together restrict the radial and axial displacement of the lower tire of the machine base and control the coaxiality error between the stator and the machine base. Step 6: Reset and unload: After the stator is pressed, the control system controls the motor reducer (1) to run in reverse, driving the transmission gear (2), reversing gear (3) and rack (4) to move in opposite directions. The slider (5) drives the positioning claw (8) to move inward to reset. The robot arm removes the pressed stator assembly from the lower tire, completing one pressing operation.

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