A permanent magnet motor assembly machine

Abstract

The present invention relates to the technical field of permanent magnet motor assembly equipment, and specifically discloses a permanent magnet motor assembly machine, including a frame, a first clamp, a second clamp, a propulsion device and a supporting device; the propulsion device includes a propulsion cylinder, a propulsion elastic member, a locking mechanism and a propulsion drive mechanism, the second clamp is assembled on the propulsion cylinder for upward and downward movement, the application end of the propulsion elastic member is fixed on the second clamp, the receiving end of the propulsion elastic member is movably connected to the propulsion cylinder, the locking mechanism controls the fixation and freedom of the receiving end of the propulsion elastic member, and the propulsion drive mechanism drives the propulsion cylinder to move vertically; the supporting device includes a supporting cylinder, an alignment head, a supporting elastic member and a supporting drive mechanism, the alignment head is used to support the lower end center of the rotor, the supporting elastic member is connected between the alignment head and the supporting cylinder, and the supporting drive mechanism drives the supporting cylinder to move vertically. The permanent magnet motor assembly machine assembles the stator and rotor through an elastic mounting method, avoids damage to the stator and rotor, and improves the motor performance.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet motor assembly equipment, and in particular to a permanent magnet motor assembly machine. Background Art

[0002] A permanent magnet motor is an electric motor that uses permanent magnets to generate a magnetic field. It has the characteristics of simple structure, high reliability and high efficiency. A permanent magnet motor usually consists of a stator, a rotor and a control device. The stator is the stationary part of the motor. It is usually composed of a circular iron core stacked with silicon steel sheets. There are stator slots evenly distributed on the stator core for placing windings (coils). The windings can be loose-embedded or formed windings. They are fixed in the stator slots by insulating materials. The function of the stator is to generate a rotating magnetic field. The rotor is the rotating part of the motor. It is usually made of permanent magnetic materials. These permanent magnetic materials can be rare earth materials, such as neodymium iron boron or samarium cobalt magnets. The permanent magnets on the rotor are usually fixed on the rotor core. They generate a constant magnetic field, which interacts with the rotating magnetic field generated by the stator to generate torque. The control device is responsible for controlling the current and voltage of the motor to achieve rotation or other movement of the motor.

[0003] In the process of producing permanent magnet motors, it is necessary to assemble the manufactured stators and rotors together. Since this process is difficult to operate manually, a permanent magnet motor assembly machine is usually used in the prior art to complete this task. This device can automatically assemble the stator and rotor of the motor together, thereby improving work efficiency. The Chinese patent document with the authorization announcement number CN117175879B discloses a stator-rotor assembly machine for a drive motor and a stator-rotor assembly method for a drive motor. In the stator-rotor assembly machine for the drive motor, the stator assembly is fixed on the mounting platform, and the driving mechanism can axially send the rotor assembly into the inner cavity of the stator assembly for assembly. In the assembly process, the relative position of the rotor assembly with respect to the stator assembly can be actively corrected to ensure that the gap between the two is uniform and avoid scratches. At the same time, the assembly machine reduces the accuracy requirements for the relative position of the stator and the rotor, thereby improving assembly efficiency and assembly quality.

[0004] However, when the stator-rotor assembly machine of the drive motor in the prior art is working, the driving mechanism drives the rotor assembly to move axially downward into the inner cavity of the stator assembly, and drives the rotor assembly to rotate at the same time. In this way, when there is a deviation between the axis of the rotor assembly and the axis of the stator assembly, the rotor assembly rotates and moves downward into the inner cavity of the stator assembly, and the permanent magnet or other components of the rotor assembly may collide with the inner wall of the stator assembly, resulting in damage to the magnet or components, making it difficult to actively correct the relative position of the rotor assembly and the stator assembly, and continued assembly is likely to cause damage to the stator and rotor and reduce the performance of the motor. Summary of the invention

[0005] The present invention provides a permanent magnet motor assembly machine, aiming to solve the problem that the stator and rotor may be damaged and the motor performance may be reduced during the assembly process of the stator and rotor assembly machine and the stator and rotor assembly method of the drive motor in the related art.

[0006] A permanent magnet motor assembly machine of the present invention comprises a frame, and also comprises: a first clamp, mounted on the frame, for clamping the stator; a second clamp, distributed above the first clamp, for clamping the upper end of the rotor; a propulsion device, mounted on the frame, for driving the second clamp to move vertically to push the rotor into the stator, the propulsion device comprises a propulsion cylinder, a propulsion elastic member, a locking mechanism and a propulsion driving mechanism, the second clamp is assembled on the propulsion cylinder for vertical movement, the application end of the propulsion elastic member is fixed on the second clamp, the receiving end of the propulsion elastic member is movably connected to the propulsion cylinder, and is used to adjust The propulsion device applies a driving force to the rotor, the locking mechanism is used to control the fixation and freedom of the receiving end of the propulsion elastic member so that the propulsion elastic member can store or release energy, and the propulsion drive mechanism is used to drive the propulsion cylinder to move vertically; the supporting device is installed on the frame, and the supporting device includes a supporting cylinder, an alignment head, a supporting elastic member and a supporting drive mechanism. The alignment head is used to support the lower end center of the rotor, and the supporting elastic member is connected between the alignment head and the supporting cylinder to apply an upward elastic force to the alignment head to support the rotor, and the supporting drive mechanism is used to drive the supporting cylinder to drive the alignment head to move vertically. The permanent magnet motor assembly machine pushes the rotor into the stator through an adjustable elastic force to assemble the rotor and the stator. The elastic installation method can absorb and disperse the assembly stress, reduce the stress concentration on the rotor or the stator during the assembly process, and avoid damage caused by excessive force. The elastic force can also adapt to the dimensional changes caused by manufacturing tolerances or temperature changes to maintain an appropriate gap between the rotor and the stator; and the locking mechanism can control the fixation and freedom of the receiving end of the propulsion elastic member according to the size of the installation resistance encountered by the rotor during the assembly process. When the installation resistance is large, the propulsion elastic force is released and the assembly is stopped, so as to avoid continuing to assemble the rotor and the stator when the assembly accuracy is poor and the alignment is poor, thereby causing damage to the stator and the rotor and affecting the electromagnetic performance and service life of the motor.

[0007] Preferably, the locking mechanism includes a mounting plate, a locking block, a connecting rod, a locking column and an unlocking column. The mounting plate is assembled on the propulsion cylinder for vertical movement, and the receiving end of the propulsion elastic member is fixedly connected to the mounting plate. The locking block is assembled on the mounting plate along the radial direction of the propulsion cylinder. A locking groove is provided on the inner cylinder wall of the propulsion cylinder for inserting the locking block to limit the movement of the mounting plate on the propulsion cylinder. The locking block is connected to the locking column assembled on the mounting plate for vertical movement through a connecting rod, and the unlocking column corresponds to the locking column up and down and is fixed on the second clamp. When the mounting plate is close to the second clamp, the unlocking column can push the locking column upward so that the locking column drives the locking block to disengage from the locking groove through the connecting rod.

[0008] Preferably, the locking column is coaxially arranged with the propulsion cylinder, and the two connecting rods are symmetrically hinged to the left and right sides of the locking column and are respectively hinged to the locking blocks.

[0009] Preferably, the propulsion device further comprises a sensor in communication connection with the propulsion drive mechanism, the sensor being fixed in the propulsion cylinder and located above the mounting plate. The sensor is used to detect the position of the mounting plate and the locking column, thereby controlling the start and stop of the propulsion drive mechanism by sending a signal to the controller.

[0010] Preferably, the supporting device further comprises a damper, which is arranged between the alignment head and the supporting cylinder. The damper is used to reduce impact and vibration when the rotor and the stator are assembled, thereby improving the stability of the assembly action.

[0011] Preferably, the second clamp includes a clamp tube, an adjusting plug and a clip. The clamp tube is assembled on the propulsion tube for up and down movement. The application end of the propulsion elastic member is fixedly connected to the clamp tube. A hydraulic ring groove is arranged outside the clamp tube. The inner side of the hydraulic ring groove is connected with a plurality of hydraulic channels. The adjusting plug is sleeved outside the clamp tube and blocked at the upper end opening of the hydraulic ring groove. The inner peripheral side of the adjusting plug is threadedly matched with the outer peripheral side of the clamp tube. The outer ends of the plurality of clips are respectively connected with the hydraulic channels. The inner end of the clip is used to clamp the upper end of the rotor. Thus, the staff can move the adjusting plug downward by rotating the adjusting plug, so that the hydraulic oil pushes the clip to clamp the rotor through the hydraulic channel, and the clamping action is realized by pressure transmission, and the clamping action is more stable.

[0012] Preferably, the outer end of the clamp is connected to the hydraulic channel via a clamping spring. The clamping spring is used to automatically compensate for slight differences in rotor size during the clamping action to maintain a stable clamping force and buffer the impact force when the second clamp contacts the rotor to reduce damage to the rotor.

[0013] Preferably, the propulsion drive mechanism includes a first motor and a propulsion gear, the first motor is mounted on a frame, the propulsion gear is sleeved outside the propulsion cylinder and connected to the output end of the first motor, the inner circumference of the propulsion gear is threadedly matched with the outer circumference of the propulsion cylinder, and the propulsion cylinder is assembled on the frame for up and down movement.

[0014] Preferably, the supporting drive mechanism includes a second motor and a transmission cylinder, the second motor is mounted on the frame, the transmission cylinder is sleeved outside the supporting cylinder and connected to the output end of the second motor, the inner circumference of the transmission cylinder is threadedly matched with the outer circumference of the supporting cylinder, and the supporting cylinder is assembled on the frame for up and down movement.

[0015] Preferably, the first clamp includes a plurality of clamping blocks distributed on the outside of the stator, the inner ends of the clamping blocks are used to clamp the stator, the outer ends of the clamping blocks are connected to a telescopic rod, the telescopic rod is connected to a driving motor, and the driving motor is used to drive the telescopic rod to extend and retract to control the clamping blocks to clamp or release the stator.

[0016] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: the rotor is pushed into the stator by an adjustable elastic force, and the rotor and stator are assembled. The elastic installation method can absorb and disperse the assembly stress, reduce the stress concentration on the rotor or stator during the assembly process, and avoid damage caused by excessive force. The elastic force can also adapt to the dimensional changes caused by manufacturing tolerances or temperature changes, and maintain an appropriate gap between the rotor and the stator; and the locking mechanism can control the fixation and freedom of the receiving end of the propulsion elastic member according to the size of the installation resistance encountered by the rotor during the assembly process. When the installation resistance is large, the propulsion elastic force is released to stop the assembly, thereby avoiding continuing to assemble the rotor and stator when the assembly accuracy is poor and the centering is poor, thereby causing damage to the stator and rotor and affecting the electromagnetic performance and service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the permanent magnet motor assembly machine of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the propulsion device and the second clamp of the permanent magnet motor assembling machine of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the locking mechanism of the permanent magnet motor assembling machine of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the second clamp of the permanent magnet motor assembling machine of the present invention.

[0021] Figure 5 It is a structural schematic diagram of a supporting device and a first clamp of a permanent magnet motor assembling machine of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the supporting drive mechanism of the permanent magnet motor assembling machine of the present invention.

[0023] Reference numerals:

[0024] 10. frame; 110. square shaft; 20. stator; 30. first clamp; 310. clamp block; 320. telescopic rod; 330. drive motor; 40. rotor; 410. head; 420. center groove; 50. second clamp; 510. clamp cylinder; 511. matching ear; 520. adjustment plug; 521. outer boss; 530. clamp; 540. hydraulic ring groove; 541. hydraulic channel; 550. clamping spring; 60. propulsion device; 610. propulsion cylinder; 611. locking groove; 612. A threaded groove; 613, a second vertical groove; 620, a propulsion elastic member; 631, a mounting plate; 631a, a radial groove; 631b, a through hole; 632, a locking block; 633, a connecting rod; 634, a locking column; 635, an unlocking column; 641, a first motor; 642, a propulsion gear; 650, a sensor; 70, a supporting device; 710, a supporting cylinder; 720, an alignment head; 730, a supporting elastic member; 741, a second motor; 741a, a transmission belt; 742, a transmission cylinder; 750, a damper. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] like Figure 1 , Figure 4 and Figure 5 As shown, an embodiment of the permanent magnet motor assembly machine of the present invention is used to assemble the manufactured stator 20 and rotor 40, including a frame 10, a first clamp 30, a second clamp 50, a propulsion device 60 and a supporting device 70. The rotor 40 in the embodiment has a head 410 at the upper end and a center groove 420 at the lower end. Among them, the first clamp 30, the propulsion device 60 and the supporting device 70 are respectively installed on the frame 10, and the second clamp 50 is connected to the propulsion device 60. The first clamp 30 is used to clamp the stator 20 so that the stator 20 is fixed. The second clamp 50 is distributed above the first clamp 30 and is used to clamp the head 410 at the upper end of the rotor 40. The propulsion device 60 is used to drive the second clamp 50 to move vertically to push the rotor 40 into the stator 20. The supporting device 70 corresponds to the propulsion device 60 up and down and is used to support the center groove 420 at the lower end of the rotor 40.

[0027] like Figure 1 and Figure 5As shown, the first clamp 30 includes a driving motor 330, a telescopic rod 320 and a clamping block 310. The four clamping blocks 310 are evenly distributed around the outer side of the stator 20 and are respectively assembled on the frame 10 along the radial direction of the rotor 40. The inner end of each clamping block 310 is used to clamp the stator 20 so that the stator 20 is fixed. The outer end of each clamping block 310 is connected to the telescopic rod 320, and the telescopic rod 320 is connected to the driving motor 330 installed on the frame 10. The driving motor 330 is used to drive the telescopic rod 320 to extend and retract, so as to control the clamping block 310 to approach or move away from the stator 20 along the radial direction of the rotor 40, so that the clamping block 310 clamps or releases the stator 20.

[0028] like Figures 1 to 3 As shown, the propulsion device 60 includes a propulsion cylinder 610 , a propulsion elastic member 620 , a locking mechanism, a propulsion driving mechanism and a sensor 650 .

[0029] The propulsion cylinder 610 is in the shape of a hollow cylinder. The outer cylinder wall of the propulsion cylinder 610 is provided with a first vertical groove and a first threaded groove 612. The inner cylinder wall of the propulsion cylinder 610 is provided with a second vertical groove 613 and a locking groove 611. The propulsion cylinder 610 is assembled on the frame 10 by moving up and down through the first vertical groove.

[0030] The propulsion drive mechanism includes a first motor 641 and a propulsion gear 642. The first motor 641 is mounted on the frame 10, the propulsion gear 642 is sleeved outside the propulsion cylinder 610 and connected to the output end of the first motor 641, and the inner circumference of the propulsion gear 642 is threadedly engaged with the first thread groove 612 to limit the vertical movement of the propulsion cylinder 610 when the propulsion gear 642 is stationary, and when the first motor 641 drives the propulsion gear 642 to rotate, the propulsion cylinder 610 is driven to move vertically through thread engagement.

[0031] The locking mechanism includes a mounting plate 631, a locking block 632, a connecting rod 633, a locking column 634 and an unlocking column 635. The mounting plate 631 is assembled in the propulsion cylinder 610 so as to move up and down, and the second clamp 50 is assembled on the propulsion cylinder 610 so as to move up and down and is located below the mounting plate 631. The propulsion elastic member 620 is connected between the mounting plate 631 and the second clamp 50 and is used to adjust the driving force applied by the propulsion device 60 to the rotor 40. The propulsion elastic member 620 is a spring, and the applying end of the propulsion elastic member 620 is fixedly connected to the second clamp 50, and the receiving end of the propulsion elastic member 620 is fixedly connected to the mounting plate 631. Thus, the rotor 40 is pushed into the stator 20 by an adjustable elastic force, and the rotor 40 and the stator 20 are assembled. The elastic installation method can absorb and disperse the assembly stress, reduce the stress concentration on the rotor 40 or the stator 20 during the assembly process, and avoid damage caused by excessive force. In addition, the elastic force can adapt to dimensional changes caused by manufacturing tolerances or temperature changes, maintain an appropriate gap between the rotor 40 and the stator 20, so as to ensure the quality of the motor.

[0032] The locking column 634 is coaxially arranged with the propulsion cylinder 610, and the two connecting rods 633 are symmetrically hinged on the left and right sides of the locking column 634, and are respectively hinged to the locking block 632. The cross-section of the mounting plate 631 is circular, and the mounting plate 631 has a radial groove 631a extending radially along the mounting plate 631 and a through hole 631b located at the center of the mounting plate 631. The locking blocks 632 on both sides of the locking column 634 are respectively assembled on the mounting plate 631 through the radial groove 631a along the radial movement of the propulsion cylinder 610, and the locking block 632 can be inserted in the locking groove 611 to limit the up and down movement of the mounting plate 631 in the propulsion cylinder 610. The unlocking column 635 corresponds to the locking column 634 up and down and is fixed on the second clamp 50. When the pushing cylinder 610 drives the mounting plate 631 to approach the second clamp 50, the unlocking column 635 can pass through the through hole 631b and push the locking column 634 upward, so that the locking column 634 drives the locking block 632 to disengage from the locking groove 611 through the connecting rod 633.

[0033] Thus, the fixing and freedom of the receiving end of the propulsion elastic member 620 is controlled by the locking mechanism, so that the propulsion elastic member 620 can store or release energy. Specifically, when the propulsion device 60 pushes the rotor 40 downward for assembly, the locking column 634 drives the locking block 632 to be inserted into the locking groove 611 through the connecting rod 633, and limits the installation plate 631 from moving up and down in the propulsion cylinder 610 to fix the receiving end of the propulsion elastic member 620. The propulsion elastic member 620 can store energy, so that the propulsion force is an adjustable elastic force; when the rotor 40 is subject to installation resistance during the assembly process, it may be due to interference or friction caused by the influence of magnetic attraction or assembly accuracy. When the installation resistance is small, under the continued push of the propulsion device 60, the rotor 40 is allowed to overcome the small installation resistance without affecting the product performance to complete the assembly. However, when the installation resistance reaches a certain value, it is said that The assembly accuracy is poor and the centering is poor. At this time, the compression of the propulsion elastic member 620 reaches a certain value, so that the second clamp 50 moves upward relative to the propulsion cylinder 610, and the unlocking column 635 passes through the through hole 631b and pushes the locking column 634 upward, so that the locking column 634 drives the locking block 632 to disengage from the locking groove 611 through the connecting rod 633, and the mounting plate 631 can move up and down in the propulsion cylinder 610. The receiving end of the propulsion elastic member 620 can move freely, so that the propulsion device 60 releases the propulsion elastic force of the second clamp 50 and stops the assembly, so as to avoid continuing to push the rotor 40 downward for assembly when the installation resistance reaches a certain value, thereby causing damage to the stator 20 and the rotor 40, affecting the electromagnetic performance and service life of the motor.

[0034] The sensor 650 is fixed in the propulsion cylinder 610 and located above the mounting plate 631. The sensor 650 is in communication connection with the first motor 641. The sensor 650 in the embodiment is a position sensor, which is used to detect the position of the locking column 634. When the unlocking column 635 triggers the locking column 634 to move up so that the mounting plate 631 can move up and down in the propulsion cylinder 610, the elastic potential energy stored in the propulsion elastic member 620 is released, so that the mounting plate 631 drives the locking column 634 to move up. When the sensor 650 detects that the upper surface of the locking column 634 contacts the lower surface of the sensor 650, the sensor 650 sends an electrical signal to the controller, and the controller controls the first motor 641 to turn off to stop driving the propulsion cylinder 610 to move down.

[0035] like Figure 1 , Figure 3 and Figure 4 As shown, the second clamp 50 includes a clamp barrel 510, an adjustment plug 520 and a clamping piece 530. The outer barrel wall at the upper end of the clamp barrel 510 is provided with a matching ear 511, and the matching ear 511 is assembled in the second vertical groove 613 of the propulsion barrel 610 for upward and downward movement, the application end of the propulsion elastic member 620 is fixedly connected to the clamp barrel 510, and the unlocking column 635 is fixed to the clamp barrel 510. The outside of the clamp barrel 510 is provided with a hydraulic ring groove 540, and the hydraulic ring groove 540 contains hydraulic oil. The inside of the hydraulic ring groove 540 is connected with multiple hydraulic channels 541. The adjusting plug 520 is sleeved on the outside of the clamp barrel 510 and blocked at the upper end opening of the hydraulic ring groove 540. The inner circumference of the adjusting plug 520 is threadedly matched with the outer circumference of the clamp barrel 510. The outer ends of multiple clips 530 are respectively connected to the hydraulic channels 541 through clamping springs 550. The inner ends of the clips 530 are used to clamp the head 410 at the upper end of the rotor 40. The outer circumference of the adjusting plug 520 in the embodiment is provided with an outer boss 521, and the outer circumference of the outer boss 521 is provided with straight lines to increase friction and facilitate the staff to control the adjusting plug 520. Therefore, the staff can move the adjusting plug 520 downward by rotating the adjusting plug 520, so that the hydraulic oil pushes the clamp 530 to clamp the rotor 40 through the hydraulic channel 541, and the clamping action is achieved through pressure transmission. The clamping action is smoother. The clamping spring 550 is used to automatically compensate for slight differences in the size of the rotor 40 during the clamping action to maintain a stable clamping force, and to cushion the impact force when the second clamp 50 contacts the rotor 40, thereby reducing damage to the rotor 40.

[0036] like Figure 1 , Figure 5 and Figure 6 As shown, the supporting device 70 includes a supporting cylinder 710 , an alignment head 720 , a supporting elastic member 730 , a supporting driving mechanism and a damper 750 .

[0037] The alignment head 720 is used to support the center groove 420 at the lower end of the rotor 40. The supporting elastic member 730 is connected between the alignment head 720 and the supporting tube 710 to apply an upward elastic force to the alignment head 720 to support the rotor 40. It is used to cooperate with the propulsion device 60 to position the rotor 40 axially so that the rotor 40 and the stator 20 can remain coaxial as much as possible, and can reduce the assembly stress and provide a certain degree of adaptability. The supporting elastic member 730 is a spring.

[0038] The supporting driving mechanism is used to drive the supporting cylinder 710 to drive the alignment head 720 to move vertically. The supporting driving mechanism includes a second motor 741 and a transmission cylinder 742. The second motor 741 is installed on the frame 10. The transmission cylinder 742 is sleeved outside the supporting cylinder 710 and connected to the transmission belt 741a at the output end of the second motor 741. The inner circumference of the transmission cylinder 742 is threadedly matched with the outer circumference of the supporting cylinder 710. A square shaft 110 is fixed on the frame 10, and the supporting cylinder 710 is sleeved outside the square shaft 110 to move up and down. Therefore, the transmission cylinder 742 is driven to rotate by the second motor 741, and the transmission cylinder 742 can drive the supporting cylinder 710 to move vertically through threaded matching.

[0039] The damper 750 is disposed between the alignment head 720 and the support tube 710, and is used to reduce impact and vibration when the rotor 40 and the stator 20 are assembled, thereby improving the stability of the assembly action. The damper 750 is a prior art and will not be described in detail here.

[0040] The working process of the embodiment of the permanent magnet motor assembly machine of the present invention comprises the following steps:

[0041] The first step is to fix the stator 20, place the stator 20 in the first fixture 30, and start the four drive motors 330 synchronously. Each drive motor 330 drives the telescopic rod 320 to extend synchronously, and controls the four clamps 310 to approach the stator 20 synchronously, so as to fix the stator 20 at the center position of the first fixture 30.

[0042] The second step is to install the rotor 40, place the head 410 at the upper end of the rotor 40 in the second fixture 50, rotate the adjusting plug 520 to move the adjusting plug 520 downward, and the hydraulic oil pushes the clamp 530 to clamp the head 410 of the rotor 40 through the hydraulic channel 541, so that the head 410 of the rotor 40 is fixed at the center position of the second fixture 50; start the second motor 741, the second motor 741 drives the transmission cylinder 742 to rotate, and the transmission cylinder 742 drives the supporting cylinder 710 through threaded cooperation to drive the alignment head 720 to move upward, so that the alignment head 720 holds the center groove 420 at the lower end of the rotor 40 upward, so as to cooperate with the second fixture 50 to position the rotor 40 axially, so that the rotor 40 and the stator 20 remain coaxial as much as possible.

[0043] The third step is to start the assembly. The first motor 641 and the second motor 741 are started. The first motor 641 drives the propulsion gear 642 to rotate. The propulsion gear 642 drives the propulsion cylinder 610 to move downward through the threaded fit. The propulsion cylinder 610 drives the rotor 40 to move downward through the second clamp 50, and pushes the rotor 40 downward into the stator 20. The second motor 741 drives the transmission cylinder 742 to rotate. The transmission cylinder 742 drives the supporting cylinder 710 through the threaded fit to drive the alignment head 720 to move downward with the rotor 40. When the propulsion device 60 pushes the rotor 40 downward for assembly, the locking column 634 drives the locking block 632 to be inserted into the locking groove 611 through the connecting rod 633, and limits the installation plate 631 from moving up and down in the propulsion cylinder 610 to fix the receiving end of the propulsion elastic member 620. The propulsion elastic member 620 can store energy, so that the propulsion force is an adjustable elastic force. The supporting elastic member 730 cooperates with the propulsion elastic member 620 to absorb and disperse the assembly stress and provide a certain adaptability.

[0044] Step 4: during the assembly process, when the rotor 40 is subjected to a small installation resistance during the assembly process, the propulsion device 60 continues to push, allowing the rotor 40 to overcome the small installation resistance without affecting the product performance and complete the assembly; when the rotor 40 is subjected to a large installation resistance during the assembly process, the compression amount of the propulsion elastic member 620 reaches a certain value, so that the second clamp 50 moves upward relative to the propulsion cylinder 610, and the unlocking column 635 passes through the through hole 631b and pushes the locking column 634 upward, so that the locking column 634 drives the lock through the connecting rod 633. The stop block 632 is disengaged from the locking groove 611, and the mounting plate 631 can move up and down in the propulsion cylinder 610. The receiving end of the propulsion elastic member 620 can move freely, so that the propulsion elastic force of the propulsion device 60 on the second clamp 50 is released, and the mounting plate 631 drives the locking column 634 to move upward. When the sensor 650 detects that the upper surface of the locking column 634 is in contact with the lower surface of the sensor 650, the sensor 650 sends an electrical signal to the controller, and the controller controls the first motor 641 to turn off to stop driving the propulsion cylinder 610 to move downward and stop assembly.

[0045] The fifth step is to complete the assembly. After the assembly process is successfully completed, rotate the adjusting plug 520 to move the adjusting plug 520 upward, and the clamp 530 releases the head 410 of the rotor 40, and synchronously start the four driving motors 330. Each driving motor 330 drives the telescopic rod 320 to shrink synchronously, and controls the four clamps 310 to synchronously move away from the stator 20, and remove the assembled stator and rotor.

[0046] Therefore, the embodiment of the permanent magnet motor assembly machine of the present invention pushes the rotor 40 into the stator 20 through an adjustable elastic force to assemble the rotor 40 and the stator 20. The elastic installation method can absorb and disperse the assembly stress, reduce the stress concentration on the rotor 40 or the stator 20 during the assembly process, and avoid damage caused by excessive force. The elastic force can also adapt to the dimensional changes caused by manufacturing tolerances or temperature changes, and maintain an appropriate gap between the rotor 40 and the stator 20; and the locking mechanism can control the fixation and freedom of the receiving end of the propulsion elastic member 620 according to the size of the installation resistance encountered by the rotor 40 during the assembly process. When the installation resistance is large, the propulsion elastic force is released to stop the assembly, thereby avoiding continuing to assemble the rotor 40 and the stator 20 when the assembly accuracy is poor and the centering is poor, thereby causing damage to the stator 20 and the rotor 40 and affecting the electromagnetic performance and service life of the motor.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A permanent magnet motor assembly machine, comprising a frame, characterized in that: Also includes: The first clamp is installed on the frame and is used to clamp the stator; the second clamp is distributed above the first clamp and is used to clamp the upper end of the rotor; the propulsion device is installed on the frame and is used to drive the second clamp to move vertically to push the rotor into the stator. The propulsion device includes a propulsion cylinder, a propulsion elastic member, a locking mechanism and a propulsion driving mechanism. The second clamp is assembled on the propulsion cylinder for vertical movement. The application end of the propulsion elastic member is fixed on the second clamp, and the receiving end of the propulsion elastic member is movably connected to the propulsion cylinder to adjust the propulsion device applied to the rotor. The locking mechanism is used to control the fixing and freedom of the receiving end of the propulsion elastic member so that the propulsion elastic member can store or release energy. The propulsion drive mechanism is used to drive the propulsion cylinder to move vertically; the supporting device is installed on the frame. The supporting device includes a supporting cylinder, an alignment head, a supporting elastic member and a supporting drive mechanism. The alignment head is used to support the lower end center of the rotor. The supporting elastic member is connected between the alignment head and the supporting cylinder to apply an upward elastic force to the alignment head to support the rotor. The supporting drive mechanism is used to drive the supporting cylinder to drive the alignment head to move vertically; The locking mechanism includes a mounting plate, a locking block, a connecting rod, a locking column and an unlocking column. The mounting plate is assembled on the propulsion cylinder for moving up and down. The receiving end of the propulsion elastic member is fixedly connected to the mounting plate. The locking block is assembled on the mounting plate along the radial direction of the propulsion cylinder. A locking groove is provided on the inner cylinder wall of the propulsion cylinder for inserting the locking block to limit the movement of the mounting plate on the propulsion cylinder. The locking block is connected to the locking column assembled on the mounting plate for moving up and down through a connecting rod. The unlocking column corresponds to the locking column up and down and is fixed on the second clamp. When the mounting plate is close to the second clamp, the unlocking column can push the locking column upward so that the locking column drives the locking block to disengage from the locking groove through the connecting rod.

2. A permanent magnet motor assembly machine according to claim 1, characterized in that: The locking column is coaxially arranged with the propulsion cylinder, and two connecting rods are symmetrically hinged to the left and right sides of the locking column and are respectively hinged to the locking blocks.

3. A permanent magnet motor assembly machine according to claim 1, characterized in that: The propulsion device also includes a sensor that is communicatively connected to the propulsion drive mechanism, and the sensor is fixed in the propulsion cylinder and located above the mounting plate.

4. A permanent magnet motor assembly machine according to claim 1, characterized in that: The supporting device also includes a damper, which is arranged between the alignment head and the supporting cylinder.

5. The permanent magnet motor assembly machine according to claim 1, characterized in that: The second clamp includes a clamp cylinder, an adjusting plug and a clamping piece. The clamp cylinder is assembled on the propulsion cylinder for upward and downward movement. The applying end of the propulsion elastic member is fixedly connected to the clamp cylinder. A hydraulic ring groove is arranged outside the clamp cylinder. The inner side of the hydraulic ring groove is connected with a plurality of hydraulic channels. The adjusting plug is sleeved outside the clamp cylinder and sealed at the upper end opening of the hydraulic ring groove. The inner circumference of the adjusting plug is threadedly matched with the outer circumference of the clamp cylinder. The outer ends of the plurality of clamps are respectively connected with the hydraulic channels, and the inner ends of the clamps are used to clamp the upper end of the rotor.

6. A permanent magnet motor assembly machine according to claim 5, characterized in that: The outer end of the clamp is connected to the hydraulic channel through a clamping spring.

7. The permanent magnet motor assembly machine according to claim 1, characterized in that: The propulsion drive mechanism includes a first motor and a propulsion gear. The first motor is installed on the frame. The propulsion gear is sleeved outside the propulsion cylinder and connected to the output end of the first motor. The inner circumference of the propulsion gear is threadedly matched with the outer circumference of the propulsion cylinder. The propulsion cylinder is assembled on the frame for up and down movement.

8. The permanent magnet motor assembly machine according to claim 1, characterized in that: The supporting drive mechanism includes a second motor and a transmission cylinder. The second motor is installed on the frame. The transmission cylinder is sleeved outside the supporting cylinder and connected to the output end of the second motor. The inner circumference of the transmission cylinder is threadedly matched with the outer circumference of the supporting cylinder. The supporting cylinder is assembled on the frame for up and down movement.

9. The permanent magnet motor assembly machine according to claim 1, characterized in that: The first clamp includes a plurality of clamping blocks distributed on the outside of the stator, the inner ends of the clamping blocks are used to clamp the stator, the outer ends of the clamping blocks are connected to a telescopic rod, the telescopic rod is connected to a driving motor, and the driving motor is used to drive the telescopic rod to extend and retract to control the clamping blocks to clamp or release the stator.

Images