CN-122001165-A - Stator and rotor coaxial press-fitting device and press-fitting method

Abstract

The invention relates to the technical field of motor assembly, in particular to a stator and rotor coaxial press-fitting device and a press-fitting method. The press-fit device comprises a lifting mechanism, a press-fit assembly, a bearing mechanism and a coaxial positioning mechanism, wherein the press-fit assembly is arranged at the lifting end of the lifting mechanism, a stator clamp is arranged on the press-fit assembly, the bearing mechanism is correspondingly arranged below the press-fit assembly and used for mounting a bearing rotor, and the coaxial positioning mechanism is arranged at the lifting end of the lifting mechanism and used for coaxially positioning the stator and the rotor through a coaxial positioning hole inserted into a rotor axis through a stator axis. The stator is clamped and fixed by the stator clamp, the coaxial positioning mechanism is driven by the lifting mechanism to penetrate through the axis of the stator and is inserted into the coaxial positioning hole on the axis of the rotor, so that the stator and the rotor are coaxial, and the stator is coaxially pressed on the rotor by the lifting mechanism downwards moving press-fitting assembly, so that the coaxial precision is high.

Inventors

• HU QIAN
• WANG SHICHANG
• GAO YIGANG
• LIN SHENGWU

Assignees

• 智新科技股份有限公司

Dates

Publication Date

20260508

Application Date

20260121

Claims (10)

1. 1. The coaxial press-fitting device for the stator and the rotor is characterized by comprising, A lifting mechanism; The pressing assembly is arranged at the lifting end of the lifting mechanism and is provided with a stator clamp; The bearing mechanism is correspondingly arranged below the press-fit assembly and is used for mounting the bearing rotor; And the coaxial positioning mechanism is arranged at the lifting end of the lifting mechanism and used for inserting the stator and the rotor into the coaxial positioning hole on the rotor axis through the stator axis to coaxially position the stator and the rotor.
2. 2. The coaxial stator and rotor press-fitting device of claim 1, wherein the lifting mechanism comprises a positioning lifting assembly and a press-fitting lifting assembly, the coaxial positioning mechanism comprises a vertical positioning rod, one end of the positioning rod is arranged at the lifting end of the positioning lifting assembly, the other end of the positioning rod is provided with a positioning tip for being inserted into a coaxial positioning hole on the axis of the rotor, and the press-fitting assembly is arranged at the lifting end of the press-fitting lifting assembly.
3. 3. The coaxial stator and rotor press-fitting device of claim 2, wherein the press-fitting lifting assembly comprises a servo electric cylinder and a balance lifting cylinder, wherein lifting ends of the servo electric cylinder and the balance lifting cylinder are connected with the press-fitting assembly, the servo electric cylinder is used for driving the press-fitting assembly to lift and move, and the balance lifting cylinder is used for balancing dead weight of the press-fitting assembly after the press-fitting assembly clamps the stator to prevent the press-fitting assembly from tilting.
4. 4. The coaxial press-fit device for the stator and the rotor according to claim 2, wherein the press-fit assembly comprises a mounting plate and a coaxial positioning block arranged on the mounting plate and used for being inserted into the stator, the positioning rod slides through a sliding hole arranged in the coaxial positioning block when lifting, the stator clamp is arranged on the mounting plate, and the stator clamp comprises at least two clamping arms rotatably arranged on the mounting plate.
5. 5. A coaxial stator and rotor press-fit device according to any one of claims 1-4 further comprising a mounting frame and a moving and cutting assembly slidably disposed on the mounting frame for moving the stator below the press-fit assembly, wherein the moving and cutting assembly comprises a turntable for receiving the stator and a driving member for driving the turntable to rotate, and the turntable is provided with a sensing member which can be sensed by a sensor disposed at a predetermined phase for calibrating the phase of the stator.
6. 6. The coaxial stator and rotor press-fitting device of claim 5, wherein the press-fitting assembly is provided with a phase positioning pin for being matched with a coaxial positioning block to be respectively inserted into a phase hole and a stator cavity of the stator after the sensor senses the sensed piece, so as to accurately position the axis and the phase of the stator.
7. 7. The coaxial press-fit device for the stator and the rotor according to claim 5, wherein one side of the mounting frame is provided with a supporting base, the moving and cutting assembly further comprises a sliding plate arranged on the supporting base in a sliding mode, the supporting base is provided with a moving and cutting telescopic cylinder used for driving the moving and cutting assembly to slide, the rotating disc and the driving piece are arranged on the sliding plate, the stator is located at a preset clamping position below the press-fit assembly when the end portion of the sliding plate abuts against the other side of the mounting frame, and a buffer limiting assembly used in a matched mode is arranged between the sliding plate and the other side of the mounting frame.
8. 8. The coaxial press-fit device for the stator and the rotor of claim 7, wherein the buffer limiting assembly comprises a buffer arranged on the mounting frame or the sliding plate, a support plate arranged on the other side of the mounting frame and protruding towards one side of the sliding plate, and a roller arranged on the support plate and used for rolling and abutting against the bottom surface of the sliding plate.
9. 9. The coaxial stator and rotor press-fitting device of claim 1, wherein the supporting mechanism comprises a fixed base, a jacking cylinder with a telescopic end penetrating through the fixed base, a supporting plate arranged at the lifting end of the jacking cylinder, a chock arranged on the fixed base and positioned on one side of the supporting plate, and a movable chock arranged on the fixed base and used for driving the chock to slide into the bottom of the supporting plate after the supporting plate is lifted.
10. 10. A method of coaxially press-fitting a stator and a rotor, characterized in that the stator and the rotor according to any one of claims 1 to 9 are used, the method comprising: rotating the stator to a set phase and moving to a preset clamping position below the press-fit assembly; the downward moving press-fitting assembly clamps the stator through a stator clamp; The coaxial positioning mechanism which is downwards shifted on the axis of the stator passes through the stator and is inserted into the coaxial positioning hole of the rotor to coaxially position; under the coaxial positioning action of the coaxial positioning mechanism, the downward moving stator is sleeved outside the rotor.

Description

Stator and rotor coaxial press-fitting device and press-fitting method Technical Field The invention relates to the technical field of motor assembly, in particular to a stator and rotor coaxial press-fitting device and a press-fitting method. Background In the new energy automobile driving unit, the permanent magnet synchronous motor has the advantages of high efficiency, high power density, wide speed regulation range and the like, and has become a core component of the new energy automobile driving unit. And the stator and rotor press-fitting process is used as a core for manufacturing the motor, and the core performance of the motor is directly determined. The stator and rotor axis deviation needs to be controlled within +/-0.05 mm in the stator and rotor press-mounting process, otherwise electromagnetic vibration, noise and efficiency attenuation are caused, and secondly, rigid collision between a rotor permanent magnet and a stator silicon steel sheet needs to be prevented in the stator and rotor press-mounting process, scratch of a stator winding insulating layer or magnetic steel fragmentation are caused, and the rotor and the stator need to be mounted under extremely high coaxiality. Disclosure of Invention The invention aims to solve the problems in the prior art and provides a stator and rotor coaxial press-fitting device and a press-fitting method. The technical proposal adopted by the invention is that the coaxial press-fitting device for the stator and the rotor comprises, A lifting mechanism; The pressing assembly is arranged at the lifting end of the lifting mechanism and is provided with a stator clamp; The bearing mechanism is correspondingly arranged below the press-fit assembly and is used for mounting the bearing rotor; And the coaxial positioning mechanism is arranged at the lifting end of the lifting mechanism and used for inserting the stator and the rotor into the coaxial positioning hole on the rotor axis through the stator axis to coaxially position the stator and the rotor. The coaxial positioning mechanism comprises a vertical positioning rod, one end of the positioning rod is arranged at the lifting end of the positioning lifting assembly, the other end of the positioning rod is provided with a positioning tip for being inserted into a coaxial positioning hole on the axis of the rotor, and the press-mounting assembly is arranged at the lifting end of the press-mounting lifting assembly. Further, the press-fitting lifting assembly comprises a servo electric cylinder and a balance lifting cylinder, wherein lifting ends of the servo electric cylinder and the balance lifting cylinder are respectively connected with the press-fitting assembly, the servo electric cylinder is used for driving the press-fitting assembly to lift and move, and the balance lifting cylinder is used for balancing dead weight of the press-fitting assembly after clamping the stator to avoid the inclination of the press-fitting assembly. Further, the press-fit assembly comprises a mounting plate and a coaxial positioning block which is arranged on the mounting plate and used for being inserted into the stator; the stator clamp is arranged on the mounting plate and comprises at least two clamping arms rotatably arranged on the mounting plate. Further, a pressure head for press-fitting the stator is arranged on the mounting plate. Further, a pressure sensor is arranged between the lifting end of the servo electric cylinder and the press-fitting assembly and used for detecting the vertical pressure of the stator. Further, be equipped with two connecting plates on the mounting panel, the opposite sides of two connecting plates all is equipped with the baffle, and pressure equipment lifting unit's lift end is located between two baffles and is equipped with the pressure-bearing piece, and pressure-bearing piece top side butt baffle, bottom side are with pressure sensor butt on the mounting panel. Further, the stator pressing assembly further comprises a mounting frame and a moving and cutting assembly which is arranged on the mounting frame in a sliding manner and used for moving the stator below the pressing assembly; the moving and cutting assembly comprises a rotary table for receiving the stator and a driving piece for driving the rotary table to rotate, wherein a sensitive piece is arranged on the rotary table and can be sensed by a sensor arranged at a preset phase and used for calibrating the phase of the stator. Further, a plurality of inductors are arranged at a plurality of preset phases and used for inducing the sensitive pieces and adapting to correct the phases of stators of different models. Further, the mounting frame is provided with a travel sensor, the press-fit assembly is provided with a travel rod, and the travel rod slides through the travel sensor and is used for detecting the lifting distance of the press-fit assembly. Further, the device also comprises a guide mechanism for guiding the pres