CN-121978524-A - Device for automatic positioning test of frameless motor

CN121978524ACN 121978524 ACN121978524 ACN 121978524ACN-121978524-A

Abstract

The invention relates to the technical field of testing devices and discloses a device for automatic positioning and testing of a frameless motor, which comprises an automatic clamping mechanism, wherein the automatic clamping mechanism comprises a rotor expansion main shaft and a rotor expansion sleeve which is sleeved on the rotor expansion main shaft in an axially movable manner, the rotor expansion main shaft is axially fixed with a fixed seat, the rotor expansion sleeve is provided with a plurality of elastic lobes distributed along the circumferential direction, a rotor to be tested is sleeved on the rotor expansion sleeve, an inclined plane matching structure is arranged between the rotor expansion main shaft and the rotor expansion sleeve, and a combined driving mechanism is used for driving the rotor expansion sleeve to axially move along the rotor expansion main shaft, driving the elastic lobes to radially expand through the inclined plane matching structure so as to lock a rotor to be tested and driving the rotor to be tested to enter a central inner cavity of a stator to be tested to be combined. According to the device, the radial expansion of the elastic valve is triggered by the axial movement of the rotor expansion sleeve, so that the centering and radial clamping of the rotor and the axial assembly of the stator and the rotor are synchronously completed, and the rotor is ensured to have higher coaxiality.

Inventors

DENG ZENGGE
BAI HONGCHAO
PAN WENCHAO
ZHANG JINGWEN

Assignees

青岛艾诺仪器有限公司

Dates

Publication Date: 20260505
Application Date: 20260401

Claims (10)

1. An apparatus for automated positioning testing of a frameless motor, comprising: The fixed seat is provided with a stator positioning seat for fixing a stator to be tested; the automatic clamping mechanism comprises a rotor expansion main shaft and a rotor expansion sleeve which is sleeved on the rotor expansion main shaft in an axially movable manner, wherein the rotor expansion main shaft is axially fixed with a fixed seat, the rotor expansion sleeve is provided with a plurality of elastic petals distributed along the circumferential direction, and a rotor to be tested is sleeved on the rotor expansion sleeve; The combined driving mechanism is used for driving the rotor expansion sleeve to axially move along the rotor expansion main shaft, driving the elastic valve to radially expand by utilizing radial force generated by the inclined plane matching structure so as to lock the rotor to be tested, and driving the rotor to be tested to enter the central inner cavity of the stator to be tested to finish combined assembly; The performance testing mechanism comprises a loading motor and a sensor, and is connected with the rotor expansion sleeve and used for driving the rotor to be tested to rotate in a combined state.
2. The device for automatic positioning test of a frameless motor according to claim 1, further comprising a positioning spindle, wherein the positioning spindle is rotationally connected with the fixed seat through a first bearing and axially fixed; The lower end of the rotor expansion sleeve is fixedly connected with an expansion connecting shaft, and the expansion connecting shaft is respectively in transmission connection with the combined driving mechanism and the performance testing mechanism.
3. The device for automatic positioning test of a frameless motor according to claim 2, wherein the positioning main shaft is fixedly connected with the rotor expansion main shaft through a positioning pin shaft, a sliding groove used for extending along the axial direction is formed in the side wall of the middle of the expansion connecting shaft, and the positioning pin shaft penetrates through the sliding groove so that the expansion connecting shaft can slide along the axial direction relative to the positioning main shaft and rotate synchronously in the circumferential direction.
4. The device for automatic positioning test of a frameless motor according to claim 2, wherein the fixing seat is further provided with a guide sleeve, the guide sleeve and the expansion connecting shaft are coaxially arranged, and the expansion connecting shaft enters the guide sleeve for limiting and guiding in the axial movement process of the expansion connecting shaft.
5. The apparatus for automated positioning testing of a frameless motor of claim 4, wherein the guide sleeve is a graphite copper sleeve or a rolling bearing.
6. The apparatus for automated positioning testing of a frameless motor of claim 2, wherein the rotor hutch sleeve comprises: the expansion part is provided with a plurality of elastic petals separated by expansion gaps, the inner sides of the elastic petals are provided with conical inclined planes, and the elastic petals radially expand to lock the rotor to be tested when being extruded by the rotor expansion main shaft; The limiting step is arranged on the outer peripheral side of the elastic valve and is used for being abutted with the bottom end surface of the rotor to be tested; And the connecting flange part is arranged at the bottom end of the rotor expansion sleeve and is used for being fixedly connected with the expansion connecting shaft.
7. The device for automatic positioning test of a frameless motor according to claim 1, wherein the bevel matching structure comprises a conical bevel arranged on the inner side of the elastic valve, the top end of the rotor expanding main shaft is used for supporting the conical bevel, or the bevel matching structure comprises a conical bevel arranged on the periphery of the rotor expanding main shaft, and the inner side of the elastic valve is used for being abutted with the conical bevel.
8. The apparatus for automated frameless motor positioning testing of claim 2, wherein the combined drive mechanism comprises a lift motor, a ball screw assembly, and a moving platform driven by the ball screw assembly, and wherein the expansion joint shaft is rotatably coupled to and axially fixed by a second bearing.
9. The apparatus for automated positioning testing of a frameless motor of claim 8, further comprising a support base plate to which the lift motor is secured; The combined driving mechanism further comprises a guide shaft, the bottom end of the guide shaft is fixed on the supporting bottom plate, and the moving platform is sleeved on the guide shaft in a sliding mode.
10. The device for automatic positioning test of a frameless motor according to claim 1, wherein the stator positioning seat is provided with a stator clamping cylinder assembly in a matching manner for fixing the stator to be tested in a radial direction.

Description

Device for automatic positioning test of frameless motor Technical Field The invention relates to the technical field of testing devices, in particular to a device for automatic positioning testing of a frameless motor. Background As a high performance torque motor, a frameless motor is usually separated from the rotor because it does not have the housing and bearing support structure of a conventional motor. When the motor delivery performance test or research and development experiment is carried out, the rotor and the stator are required to be respectively fixed and accurately assembled so as to ensure that the air gap between the rotor and the stator is uniform and meets the design requirement. Most of existing frameless motor test tools adopt a manual clamping mode. Because the frameless motor rotor is usually provided with the ferromagnetic magnetic steel, and the air gap between the stator and the rotor is extremely small, the coaxiality of the rotor and the stator is difficult to ensure by manual operation, and under the influence of the strong magnetic adsorption force, the rotor pole is easy to collide or rub with the inner wall of the stator, so that the magnetic steel is cracked or the stator coil is damaged. In addition, the manual clamping process is tedious, the test beat is longer, and the high-efficiency and automatic mass production test requirements cannot be met. Therefore, how to realize automatic positioning, reliable clamping and accurate assembly of the rotor and the stator of the frameless motor is a technical problem to be solved in the current motor detection field. Disclosure of Invention Based on the technical problems that the frameless motor is difficult to automatically clamp and position in the test process and the assembly precision is low in the prior art, the application provides a device for automatically positioning and testing the frameless motor, by arranging a fixed rotor expansion main shaft with a conical inclined plane, the rotor expansion sleeve capable of moving axially is matched, the vertical stroke is utilized to trigger the radial expansion of the elastic valve, the automatic expansion positioning of the rotor to be tested is realized, meanwhile, the rotor is driven by the combined driving mechanism to enter the inner cavity of the stator, and the dynamic performance detection of the motor is realized by the matching performance testing mechanism. The scheme can remarkably improve the clamping consistency of the frameless motor, effectively avoid collision when the stator and the rotor are assembled, and provide a reliable hardware basis for automatic testing. The invention provides a device for automatic positioning test of a frameless motor, which comprises: The fixed seat is provided with a stator positioning seat for fixing a stator to be tested; the automatic clamping mechanism comprises a rotor expansion main shaft and a rotor expansion sleeve which is sleeved on the rotor expansion main shaft in an axially movable manner, wherein the rotor expansion main shaft is axially fixed with a fixed seat, the rotor expansion sleeve is provided with a plurality of elastic petals distributed along the circumferential direction, and a rotor to be tested is sleeved on the rotor expansion sleeve; The combined driving mechanism is used for driving the rotor expansion sleeve to axially move along the rotor expansion main shaft, driving the elastic valve to radially expand by utilizing radial force generated by the inclined plane matching structure so as to lock the rotor to be tested, and driving the rotor to be tested to enter the central inner cavity of the stator to be tested to finish combined assembly; The performance testing mechanism comprises a loading motor and a sensor, and is connected with the rotor expansion sleeve and used for driving the rotor to be tested to rotate in a combined state. In some embodiments, the positioning device further comprises a positioning main shaft, wherein the positioning main shaft is rotationally connected with the fixed seat through a first bearing and is axially fixed; the rotor expanding main shaft is fixedly connected with the positioning main shaft; The lower end of the rotor expansion sleeve is fixedly connected with an expansion connecting shaft, and the expansion connecting shaft is respectively in transmission connection with the combined driving mechanism and the performance testing mechanism. In some embodiments, the positioning main shaft is fixedly connected with the rotor expansion main shaft through a positioning pin shaft, a sliding groove used for extending along the axial direction is formed in the side wall of the middle of the expansion connecting shaft, and the positioning pin shaft penetrates through the sliding groove so that the expansion connecting shaft can slide along the axial direction and synchronously rotate along the circumferential direction relative to the positioning main shaft. In some embod