Stator and rotor assembly equipment and assembly method

Abstract

This invention discloses a stator and rotor assembly equipment and its assembly method. The assembly equipment includes a frame, a rotor end cover conveying mechanism, a positioning mechanism, a heating mechanism, a stator conveying mechanism, a pressing mechanism, and a transfer mechanism. A worktable is provided on the frame; the rotor end cover conveying mechanism and the stator conveying mechanism are arranged parallel to each other on the worktable; the positioning mechanism and the heating mechanism are arranged along the conveying direction of the rotor end cover conveying mechanism; the pressing mechanism is located at the end of the stator conveying mechanism; and the transfer mechanism is connected between the heating mechanism and the pressing mechanism. Therefore, this assembly equipment can fix the stator circumferentially and vertically when the rotor is inserted into the stator, making it easier to center the rotor during insertion and resulting in faster and more accurate assembly. Furthermore, the stepped support mechanism ensures that each step in the pressing process between the rotor end cover and the stator has an independent support structure, achieving complete assembly.

Description

Technical Field

[0001] This invention relates to the field of new energy motor assembly technology, and in particular to a stator and rotor assembly equipment and its assembly method. Background Technology

[0002] Motors have become an indispensable driving component in various devices. During motor manufacturing, the stator and rotor need to be assembled together. Before this assembly, existing stator and rotor assembly equipment generally has a complex structure, is bulky, heavy, and occupies a large amount of space.

[0003] Especially for the main drive motors used in current new energy vehicles, the stator and rotor are both very large in size and weight. Before assembly, the rotor is already magnetized, resulting in a significant magnetic force between the rotor and stator during installation. This magnetic force, combined with the rotor's weight, makes alignment during rotor insertion and can lead to misalignment. Existing equipment for assembling such motors has the following drawbacks: 1. It typically lacks a fixing mechanism for the stator. Due to the rotor's magnetism, the significant magnetic force during insertion directly causes stator displacement, making alignment difficult and resulting in low assembly accuracy. 2. The lifting mechanism in the conveying system is rigidly connected to the ship plate. Because the rotor is heavy, the ship plate inevitably sways during rotor transport. The rigid connection directly transmits the torque from this swaying to the lifting mechanism, causing damage and shortening the service life of the conveying system. 3. When the rotor is inserted into the stator, the traditional press-fitting mechanism does not have a separate support device for the bearing at the lower end of the rotor. This can easily lead to the bearing falling off due to lack of support under the bearing when the rotor is installed into the stator. Furthermore, the traditional press-fitting mechanism lacks effective support for the stator, which can cause uneven force distribution when the rotor is installed into the stator and when the end cover is mounted on the upper edge of the stator. This results in misalignment of the rotor end cover and stator assembly, low assembly accuracy, and instability. Therefore, the existing rotor and stator assembly equipment should be improved to solve the above problems. Summary of the Invention

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a stator and rotor assembly device and its assembly method. This device can protect the conveying mechanism during material handling and extend the service life of the conveying mechanism; it can fix the stator circumferentially and vertically when the rotor is inserted into the stator, making it easier to center the rotor during installation and making the assembly faster and more accurate; and it adopts a stepped support mechanism so that each step of the rotor end cover and stator pressing process has an independent support structure for support, achieving complete assembly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stator and rotor assembly device includes a frame, a rotor end cover conveying mechanism mounted on the frame, a positioning mechanism for rotating and positioning the rotor end cover, a heating mechanism for heating the rotor end cover, a stator conveying mechanism for conveying the stator, a pressing mechanism for pressing the rotor end cover onto the stator, and a transfer mechanism for transferring the rotor end cover from the heating mechanism to the pressing mechanism. A worktable is provided on the frame; the rotor end cover conveying mechanism and the stator conveying mechanism are arranged parallel to each other on the worktable; the positioning mechanism and the heating mechanism are arranged along the conveying direction of the rotor end cover conveying mechanism; the pressing mechanism is located at the end of the stator conveying mechanism; and the transfer mechanism is connected between the heating mechanism and the pressing mechanism.

[0007] As a preferred embodiment: the positioning mechanism includes a positioning bracket, a rotary drive motor, a drive ring, a displacement sensor, and a lifting drive device. The positioning bracket is installed on the side of the rotor end cover conveying mechanism, the lifting drive device is installed on the top of the positioning bracket, the rotary drive motor is installed at the output end of the lifting drive device, the drive ring is installed on the shaft end of the rotary drive motor, and the displacement sensor is located on the side of the drive ring and faces the side wall of the rotor end cover.

[0008] As a preferred embodiment: the positioning bracket is provided with an adjustment device on its side for keeping the pins on the rotor end cover parallel to the conveying direction of the rotor end cover conveying mechanism. The adjustment device includes an adjustment rod arranged parallel to the conveying direction of the rotor end cover and an adjustment cylinder that drives the adjustment rod toward the rotor end cover. The adjustment rod is installed on the shaft end of the adjustment cylinder.

[0009] As a preferred embodiment: the heating mechanism includes a heating bracket, a high-frequency heating coil that can be lifted and lowered on the heating bracket, and a lifting drive cylinder that drives the high-frequency heating coil to rise and fall on the heating bracket. The lifting drive cylinder is mounted on the heating bracket, and the high-frequency heating coil is mounted at the output end of the lifting drive cylinder.

[0010] As a preferred embodiment: the rotor end cover conveying mechanism is provided with a ship plate for supporting the rotor end cover, and a lifting and positioning mechanism for positioning and lifting the ship plate is provided below the rotor end cover conveying mechanism. The lifting and positioning mechanism includes a base plate, a top plate movably mounted on the base plate, a first cylinder for driving the base plate and the top plate to rise and fall, and a second cylinder for locking the base plate and the top plate together. Multiple ball bearings are provided between the base plate and the top plate, and a pin for positioning on the top plate is provided. The shaft end of the first cylinder is connected to the base plate. The second cylinder is mounted on the base plate, and a locking pin that can pass through the base plate and the top plate is installed on the shaft end of the second cylinder.

[0011] As a preferred embodiment: the transfer mechanism includes a transfer bracket that can be raised and lowered relative to the frame, a material picking device, and a longitudinal drive assembly that drives the material picking device to reciprocate between the heating mechanism and the pressing mechanism. The transfer bracket is longitudinally positioned above the rotor end cover conveying mechanism and the stator conveying mechanism. The longitudinal drive assembly is mounted on the transfer bracket. The material picking device is mounted on the output end of the longitudinal drive assembly, and a ring pressing part for pressing the end cover is provided around the material picking device.

[0012] As a preferred embodiment: the pressing mechanism includes a pressing electric cylinder, a pressing head, a stator fixing assembly, and a pressing bracket. The pressing electric cylinder is vertically mounted above the pressing bracket, the pressing head is mounted on the output end of the pressing electric cylinder, and the stator fixing assembly is mounted below the pressing bracket and faces the pressing head.

[0013] As a preferred embodiment: the stator fixing assembly includes a fixing plate, two stator clamping blocks located on the fixing plate, a clamping drive cylinder that drives the two stator clamping blocks to close or open to clamp or release the stator, and a positioning and lifting drive cylinder that drives the fixing plate to rise and fall. The two stator clamping blocks are mounted on the output end of the clamping drive cylinder. Limiting devices for preventing vertical movement of the stator are respectively provided on the two clamping blocks. The limiting devices include limiting blocks and limiting drive cylinders that drive the limiting blocks to move back and forth. The limiting drive cylinders are mounted on the stator clamping blocks, and the limiting blocks are mounted on the shaft end of the limiting drive cylinders and located between the two stator clamping blocks. The output end of the positioning and lifting drive cylinder is connected to the fixing plate.

[0014] As a preferred embodiment, the pressing mechanism further includes a guiding device located inside the frame. The guiding device includes a guiding drive cylinder, a guiding plate, and a guide pin that is liftably mounted on the guiding plate. The output end of the guiding drive cylinder is connected to the guiding plate, and the guide pin is vertically mounted on the guiding plate and is located between the two stator clamping blocks.

[0015] As a preferred embodiment, the pressing mechanism further includes a stepped support mechanism located below the stator conveying mechanism. The stepped support mechanism includes a support plate, a positioning boss, a stepped block, and a support drive cylinder that drives the stepped block to move back and forth to change the support position. The positioning boss is installed in the middle of the support plate, the stepped block is laterally movable on the side of the support plate, and the shaft end of the support drive cylinder is connected to the stepped block.

[0016] As a preferred embodiment: the stepped support mechanism has two sets of stepped blocks and a support drive cylinder, the two sets of stepped blocks and the support drive cylinder being symmetrically distributed on both sides of the support plate; stepped notches are respectively provided on both sides of the support plate corresponding to the stepped blocks, the stepped blocks being movable back and forth in the stepped notches; the stepped block includes a first stepped part for supporting the rotor bearing and a second stepped part for supporting the lower end of the stator, the first stepped part and the second stepped part being integrally connected.

[0017] An assembly method for use in the stator and rotor assembly equipment described above includes the following steps:

[0018] S1. The rotor end cover conveying mechanism feeds the rotor end cover to the positioning mechanism;

[0019] S2. The positioning mechanism drives the rotor end cover to rotate until the displacement sensor detects that it is in position and then stops rotating.

[0020] S3. The rotor end cover conveying mechanism conveys the rotor end cover to the heating mechanism. The high-frequency heating coil of the heating mechanism descends to cover the end cover and heats it to the predetermined temperature.

[0021] S4. After the rotor end cover is heated, the high-frequency heating coil returns to its original position. The first cylinder of the lifting and positioning mechanism drives the base plate and the top plate to lift the ship plate. At the same time, the second cylinder drives the locking pin to exit the top plate, so that the top plate can move relative to the base plate. The material picking device of the transfer mechanism moves to the top of the ship plate to pick up the rotor end cover and moves it to the pressing mechanism.

[0022] S5. The locking pin of the lifting and positioning mechanism locks the top plate under the drive of the second cylinder, and pushes the base plate and the top plate back to their original positions under the drive of the first cylinder.

[0023] S6. The stator fixing assembly descends to the outside of the stator, and its stator clamping block and limiting device fix the stator in the circumferential and vertical directions. The guide pin of the guide device is pushed upward by the guide drive cylinder to abut against the rotor shaft end, and moves downward as the rotor end cover moves downward.

[0024] S7. The first step of the stepped support mechanism moves forward under the drive of the support drive cylinder. The first step moves to the bottom of the lower bearing of the rotor to support the bearing.

[0025] S8. After the lower end of the rotor shaft is assembled with the bearing, the first step of the stepped support mechanism is pushed back by the support drive cylinder, so that the second step is located below the stator edge and forms support for the stator edge; the press head continues to press down until the rotor is completely pressed into the stator, and the end cover is sleeved and installed on the upper edge of the stator, and the assembly is completed.

[0026] Compared with the prior art, the present invention has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, by integrating the rotor end cover conveying mechanism, positioning mechanism, heating mechanism, stator conveying mechanism, pressing mechanism, and transfer mechanism onto a frame to form a stator and rotor assembly equipment, the assembly equipment adopts a lifting and positioning mechanism with a movable top plate, which can protect the lifting and positioning mechanism and the conveying mechanism from damage during material handling, thus extending the service life of the mechanism; it can fix the stator circumferentially and vertically respectively when the rotor is inserted into the stator, making it easier to center the rotor during installation and making the assembly faster and more accurate; and a stepped support mechanism is set in the pressing mechanism so that each mating part of the rotor end cover and stator has an individual support structure for support during the pressing process, which improves the assembly accuracy and stability, and achieves complete assembly.

[0027] To more clearly illustrate the structural features and effects of the present invention, a detailed description is provided below in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of the assembly equipment of the present invention;

[0029] Figure 2 This is a three-dimensional schematic diagram of the assembly equipment of the present invention from another perspective;

[0030] Figure 3 This is a three-dimensional schematic diagram of the heating mechanism of the present invention;

[0031] Figure 4 This is a three-dimensional schematic diagram of the lifting and positioning mechanism of the present invention;

[0032] Figure 5 This is a side view of the lifting and positioning mechanism of the present invention;

[0033] Figure 6 This is a three-dimensional schematic diagram of the stator fixing assembly of the present invention;

[0034] Figure 7 This is a three-dimensional schematic diagram of the transfer mechanism of the present invention;

[0035] Figure 8 This is a side view of the transfer mechanism of the present invention;

[0036] Figure 9 This is a three-dimensional schematic diagram of the positioning mechanism of the present invention;

[0037] Figure 10 This is a three-dimensional schematic diagram of the guiding device of the present invention;

[0038] Figure 11 This is a three-dimensional schematic diagram of the upper part of the pressing mechanism of the present invention;

[0039] Figure 12This is a three-dimensional schematic diagram of the stepped support mechanism of the present invention.

[0040] Explanation of reference numerals in the attached diagram:

[0041] 10. Frame; 11. Workbench; 20. Rotor end cover conveying mechanism; 21. Ship plate; 22. Lifting and positioning mechanism; 221. Base plate; 222. Top plate; 223. First cylinder; 224. Second cylinder; 225. Pin; 226. Locking pin; 30. Positioning mechanism; 31. Positioning bracket; 32. Rotary drive motor; 33. Drive ring; 34. Displacement sensor; 35. Lifting drive device; 40. Heating mechanism; 41. Heating bracket; 42. High-frequency heating ring; 43. Lifting drive cylinder; 50. Stator conveying mechanism; 60. Pressing mechanism; 61. Pressing electric cylinder; 62. Pressing head; 63. Stator fixing assembly; 631. Fixing plate; 632. Stator clamping block; 633. Clamping drive cylinder; 634. 635. Position lifting drive cylinder; 6351. Limiting device; 6352. Limiting drive cylinder; 64. Guiding device; 641. Guiding drive cylinder; 642. Guide plate; 643. Guide pin; 65. Step support mechanism; 651. Support plate; 652. Positioning boss; 653. Step block; 6531. First step; 6532. Second step; 654. Support drive cylinder; 655. Step notch; 656. Vertical cylinder; 66. Pressing bracket; 67. Material lifting drive cylinder; 70. Transfer mechanism; 71. Transfer bracket; 72. Material picking device; 73. Longitudinal drive assembly; 74. Ring pressing part; 80. Adjusting device; 81. Adjusting rod; 82. Adjusting cylinder; 90. Rotor end cover. Detailed Implementation

[0042] The present invention is as follows Figures 1 to 12 As shown, a stator and rotor assembly device and its assembly method are disclosed. The assembly device includes a frame 10, a rotor end cover conveying mechanism 20 mounted on the frame 10, a positioning mechanism 30 for rotating and positioning the rotor end cover, a heating mechanism 40 for heating the rotor end cover, a stator conveying mechanism 50 for conveying stator material, a pressing mechanism 60 for pressing the rotor end cover onto the stator, and a transfer mechanism 70 for transferring the rotor end cover from the heating mechanism 40 to the pressing mechanism 60, wherein:

[0043] The frame 10 is provided with a workbench 11 for supporting the above-mentioned mechanisms.

[0044] The rotor end cover refers to the combination of the rotor and the end cover. The rotor is magnetized, and the end cover is installed on the upper end of the rotor shaft. The upper end of the rotor shaft and the end cover are fitted with a bearing. The stator is cylindrical. Finally, the rotor is installed in the stator, and the end cover is installed on the upper end of the stator.

[0045] Both the rotor end cover conveying mechanism 20 and the stator conveying mechanism 50 adopt the form of belt drive combined with guide rail. The rotor end cover conveying mechanism 20 and the stator conveying mechanism 50 are arranged in parallel on the workbench 11. The parallel arrangement makes the material conveying path of the entire machine more reasonable and compact, which is convenient for the planning of the assembly process. The positioning mechanism 30 and the heating mechanism 40 are arranged along the conveying direction of the rotor end cover conveying mechanism 20. The pressing mechanism 60 is located at the end of the stator conveying mechanism 50. The transfer mechanism 70 is connected between the heating mechanism 40 and the pressing mechanism 60 and is used to transfer the stator from the heating mechanism 40 to the pressing mechanism 60.

[0046] The positioning mechanism 30 includes a positioning bracket 31, a rotary drive motor 32, a drive ring 33, a displacement sensor 34, and a lifting drive device 35. The positioning bracket 31 is installed beside the rotor end cover conveying mechanism 20. The lifting drive device is installed on top of the positioning bracket 31. The rotary drive motor 32 is installed on the output end of the lifting drive device 35. The drive ring 33 is installed on the shaft end of the rotary drive motor 32. The displacement sensor 34 is located beside the drive ring 33 and faces the side wall of the rotor end cover 90. The outer wall of the rotor end cover has a specific groove structure. After the displacement sensor 34 detects the groove, it indicates that the rotation is in place, and the rotary drive motor 32 stops driving. Specifically, during positioning, the lifting drive device 35 drives the rotary drive motor 32 and the drive ring 33 to descend until the drive ring 33 is in close contact with the upper surface of the end cover. The friction between the drive ring 33 and the end cover drives the end cover to rotate relative to the rotor until the groove position is detected. After the positioning is completed, the lifting drive device 35 drives the rotary drive motor 32 and the drive ring 33 to reset upwards; the lifting drive device 35 is a cylinder.

[0047] The positioning bracket 31 is equipped with an adjustment device 80 on its side to keep the pins on the rotor end cover (pins are arranged along the circumference of the outer wall of the end cover) parallel to the conveying direction. The adjustment device 80 includes an adjustment rod 81 arranged parallel to the conveying direction of the rotor end cover and an adjustment cylinder 82 that drives the adjustment rod 81 towards the rotor end cover. The adjustment rod 81 is mounted on the shaft end of the adjustment cylinder 82. When the adjustment cylinder 82 drives the adjustment rod 81 forward, the adjustment rod will abut against the two pins of the end cover, so that the end cover remains fixed after being positioned by the positioning mechanism 30. The main function of the adjustment device 80 is as follows: the rotation drive motor 32 drives the drive ring 33 to rotate, and the drive ring 33 drives the end cover to rotate. After the displacement sensor detects the groove structure, although the drive stops immediately, due to the bearing-type rotational fit between the end cover and the rotor, there will be a small rotational inertia, resulting in a small-angle deflection. The adjustment device can use the cooperation between the adjustment rod and the pins of the end cover to make the end cover accurately fixed.

[0048] The heating mechanism 40 is used to heat the end cover, causing it to expand due to heat, so as to facilitate subsequent mating with the upper end of the stator. The heating mechanism 40 includes a heating bracket 41, a high-frequency heating coil 42 that can be lifted and lowered on the heating bracket 41, and a lifting drive cylinder 43 that drives the high-frequency heating coil 42 to move up and down on the heating bracket 41. The lifting drive cylinder 43 is mounted on the heating bracket 41, and the high-frequency heating coil 42 is mounted on the output end of the lifting drive cylinder 43.

[0049] The rotor end cover conveying mechanism 20 is provided with a ship plate 21 for supporting the rotor end cover, and a lifting and positioning mechanism 22 for positioning the ship plate 21 is provided below the rotor end cover conveying mechanism 20. The lifting and positioning mechanism 22 includes a base plate 221, a top plate 222 movably mounted on the base plate 221, a first cylinder 223 for driving the base plate 221 and the top plate 222 to rise and fall, and a second cylinder 224 for locking the base plate 221 and the top plate 222 together. A plurality of ball bearings are provided between the base plate 221 and the top plate 222, and a pin 225 for positioning on the ship plate 21 is provided on the top plate 222. The shaft end of the first cylinder 223 is connected to the base plate 221. The shaft end of the second cylinder 224 is equipped with a locking pin 226 that can pass through the base plate 221 and the top plate 222.

[0050] The rotor end cover, after being heated by the heating mechanism 40, is transferred to the pressing mechanism 60 by the transfer mechanism 70. When the transfer mechanism 70 removes the rotor end cover, due to its large overall mass, the rotor end cover will be squeezed and deformed by the rotor end cover conveying mechanism 20 during the removal process, making it impossible to convey materials. To avoid this situation, a lifting and positioning mechanism is used to lift the ship plate 21 to a certain height before the removal operation. However, it is difficult to avoid shaking the ship plate during the removal process. Due to the large weight of the rotor end cover, this shaking force will be directly transmitted through the ship plate to the lifting and positioning mechanism, causing local damage to the lifting and positioning mechanism and making it unusable for a long time. Therefore, the top plate 222 is movably mounted on the base plate 221. Specifically, multiple ball bearings are arranged between the upper surface of the base plate 221 and the lower surface of the top plate 222. Simultaneously, a structure is provided on the base plate 221 to prevent the top plate 222 from detaching from it. This ensures that the top plate 222 is movable without detaching from the base plate 221. When the locking pin 226 is not inserted into the top plate 222, the top plate 222 can move relative to the base plate 221. At this time, material handling operations can be performed. The shaking force generated during material handling is dissipated by the rolling of the ball bearings, avoiding direct impact on the lower part of the lifting and positioning mechanism 22 and extending the service life of the lifting and positioning mechanism 22. After material handling is completed, the lifting and positioning mechanism 22 lowers and resets the boat plate 21. Simultaneously, the locking pin 226 remains inserted into the top plate 222, locking it securely.

[0051] The transfer mechanism 70 includes a transfer bracket 71 that can be raised and lowered relative to the frame 10, a material picking device 72, and a longitudinal drive assembly 73 that drives the material picking device 72 to reciprocate between the heating mechanism 40 and the pressing mechanism 60. The transfer bracket 71 is longitudinally positioned above the rotor end cover conveying mechanism 20 and the stator conveying mechanism 50. The longitudinal drive assembly 73 is mounted on the transfer bracket 71, and the material picking device 72 is mounted on the output end of the longitudinal drive assembly 73. The material picking device 72 is an internally supported gripper that extends into the rotor shaft (which is hollow inside) in a retracted state, and then expands and extends, using the friction between the gripper and the inner wall of the rotor shaft to pick up the rotor. The longitudinal drive assembly 73 is a combination of a motor, a lead screw, and a slider. Since this drive method is existing technology, it will not be described in detail here. In addition, in this application, the drive device and drive assembly can be in the form of a cylinder or a motor combined with a lead screw and a slider, as needed. A ring-shaped pressure bar is provided around the material picking device 72 to form a ring pressure part 74. The ring pressure part 74 is used to simultaneously press the end cover against the rotor when the material picking device 72 picks up the rotor, so as to prevent the end cover from rotating or falling off the rotor.

[0052] The pressing mechanism 60 includes a pressing electric cylinder 61, a pressing head 62, a stator fixing assembly 63, and a pressing bracket 64. The pressing electric cylinder 61 is vertically mounted above the transfer bracket 71. The pressing head 62 is mounted on the output end of the pressing electric cylinder 61. The stator fixing assembly 63 is mounted below the pressing bracket 64 and faces the pressing head 62. The transfer bracket 71 is located below the pressing bracket 60.

[0053] In this embodiment, the pressing head 62 is actually the material taking device 72. The pressing electric cylinder 61 drives the transfer bracket 71 to rise and fall, so that the material taking device 72 drives the rotor end cover to be assembled on the stator. In addition, a material lifting drive cylinder 67 is also provided above the pressing bracket 60. The material lifting drive cylinder 67 is mainly used as a backup and can be used when the downforce requirement of the stator and rotor is relatively small.

[0054] The stator fixing assembly 63 includes a fixing plate 631, two stator clamping blocks 632 located on the fixing plate 631, a clamping drive cylinder 633 for driving the two stator clamping blocks 632 to close or open to clamp or release the stator, and a positioning and lifting drive cylinder 634 for driving the fixing plate 631 to rise and fall. The two stator clamping blocks 632 are mounted on the output end of the clamping drive cylinder 633; ​​and limiting devices 635 for preventing vertical movement of the stator are respectively provided on the two clamping blocks. The limiting device 635 includes a limiting block 6351 and a limiting drive cylinder 6352 that drives the limiting block 6351 to move back and forth. The limiting drive cylinder 6352 is mounted on the stator clamping block 632, and the limiting block 6351 is mounted on the shaft end of the limiting drive cylinder 6352 and located between the two stator clamping blocks 632. The positioning and lifting drive cylinder 634 is mounted on the frame 10, and the output end of the positioning and lifting drive cylinder 634 is connected to the fixing plate 631. The stator fixing assembly 63 is mainly used to fix the stator when the rotor end cover is assembled downwards with the stator, so as to avoid the large magnetic force between the rotor and the stator causing the stator to shift, thereby improving the assembly accuracy. In practical use, the stator conveying mechanism 50 conveys the stator to the area below the pressing mechanism 60. The positioning and lifting drive cylinder 634 drives the fixing plate 631 to descend, positioning the two stator clamping blocks 632 on the outside of the stator. The two stator clamping blocks 632 close to clamp the stator, and the limiting block 6351 of the limiting device 635 extends and locks onto the outer wall of the stator, achieving circumferential and vertical fixation of the stator and improving the stability of the stator placement. When the stator fixing assembly 63 is not in use, the positioning and lifting drive cylinder 634 drives the fixing plate 631 to rise above the stator conveying mechanism 50 to avoid obstructing the stator conveying.

[0055] The pressing mechanism 60 also includes a guiding device 64 located inside the frame 10. The guiding device 64 includes a guiding drive cylinder 641, a guide plate 642, and a guide pin 643 that is liftably mounted on the guide plate 642. The output end of the guiding drive cylinder 641 is connected to the guide plate 642, and the guide pin 643 is vertically mounted on the guide plate 642 and corresponds to the two stator clamping blocks 632. The guiding device 64 is mainly used to abut against the lower end of the rotor shaft when the rotor enters the stator, and then gradually moves down as the rotor end cover moves down, playing a guiding role in guiding the rotor into the stator. Based on the stator fixing assembly 63, it further improves the assembly accuracy and assembly efficiency of the rotor end cover and the stator.

[0056] The pressing mechanism 60 also includes a stepped support mechanism 65 located below the stator conveying mechanism 50. The stepped support mechanism 65 includes a support plate 651, a positioning boss 652, a stepped block 653, and a support drive cylinder 654 that drives the stepped block 653 to move back and forth to change the support position. The positioning boss 652 is installed in the middle of the support plate 651, and the stepped block 653 is laterally movable on the side of the support plate 651. The shaft end of the support drive cylinder 654 is connected to the stepped block 653. The stepped support mechanism 65 has two sets of stepped blocks 653 and a support drive cylinder 654, which are symmetrically distributed on both sides of the support plate 651. Step notches 655 are respectively provided on both sides of the support plate 651 corresponding to the stepped blocks 653. The stepped blocks 653 can move back and forth and are located in the step notches 655. The stepped block 653 includes a first stepped part 6531 for supporting the rotor bearing and a second stepped part 6532 for supporting the lower end of the stator. The first stepped part 6531 and the second stepped part 6532 are integrally connected. Additionally, a vertical cylinder 656 is provided below the support plate 651 to drive the support plate 651 to rise and fall. After the stator is delivered to the position, the vertical cylinder 656 drives the support plate 651 to rise relative to the stepped block 653. The positioning boss 652 passes through the through hole on the ship plate 21 (the ship plate on which the stator is loaded has a through hole) to position the stator. At the same time, the bearing is placed on top of the positioning boss 652 (the bearing and the stator are loaded at the same time). Then, the support drive cylinder 654 drives the stepped block 653. 53 moves forward, causing the first stepped portion 6531 to extend into the through hole of the ship plate 21. The vertical cylinder 656 lowers the drive support plate 651 to a certain height, causing the bearing to fall onto the first stepped portion 6531. The first stepped portions 6531 on both sides symmetrically support the bearing. As the rotor shaft descends, the bearing is installed at the lower end of the rotor shaft. The stepped block 653 moves backward, placing the second stepped portion 6532 below the stator end face, providing strong support for the stator end face during stator and end cover assembly. During this process, the guide pin 642 passes through the positioning boss 652, the through hole of the ship plate 21, and then abuts against the lower end of the stator and rotor shaft.

[0057] Specifically, during assembly, the stepped support mechanism 65 first moves the first stepped portion 6531 forward, allowing it to support the bearing upwards. This provides strong support for the bearing when the rotor is inserted into the stator. Under the downward pressure of the pressing head 62, the bearing is tightly fitted into the lower end of the rotor shaft, preventing it from falling off during hoisting. When the middle section of the rotor is fully inserted into the stator and the end cover contacts the upper end of the stator, the stepped support mechanism 65 retracts the first stepped portion 6531 backwards, placing the second stepped portion 6532 at the lower edge of the stator to support the lower end face of the stator, thus completing the press-fit between the end cover and the upper end of the stator. This stepped support structure provides support for different stress points, ensuring even stress distribution and proper fit of all parts, thus improving overall assembly accuracy.

[0058] When the transfer mechanism 70 picks up the rotor end cover, the pressing cylinder 61 drives the transfer mechanism 70 to descend as a whole, causing the rotor end cover to fall onto the stator. As the rotor end cover falls, the guide pin 643 of the guiding device 64 extends upward and abuts against the lower end of the rotor shaft. The pressing cylinder 61 continues to drive the transfer mechanism 70 to move downward, and the guide pin 643 descends slowly until the rotor end cover and stator are assembled. During this process, the stator fixing assembly 63 and the stepped support mechanism 65 operate to assist the rotor end cover in being fully assembled onto the stator.

[0059] An assembly method for use in the stator and rotor assembly equipment described above includes the following steps:

[0060] S1. The rotor end cover conveying mechanism 20 feeds the rotor end cover to the positioning mechanism 30.

[0061] S2. The positioning mechanism 30 drives the rotor end cover to rotate until the displacement sensor 34 detects the position of the groove on the end cover and then stops rotating.

[0062] S3. The rotor end cover conveying mechanism 20 conveys the rotor end cover to the heating mechanism 40. The high-frequency heating coil 42 of the heating mechanism 40 descends to cover the end cover and heats it to the predetermined temperature.

[0063] S4. After the rotor end cover is heated, the high-frequency heating coil 42 returns to its original position. The first cylinder 223 of the lifting and positioning mechanism 22 drives the base plate 221 to lift the ship plate 21. At the same time, the second cylinder 224 drives the locking pin 226 to exit the top plate 222, so that the top plate 222 can move relative to the base plate 221. The material picking device 72 of the transfer mechanism 70 moves to the top of the ship plate 21 to pick up the rotor end cover and move it to the pressing mechanism 60.

[0064] S5. The locking pin 226 of the lifting and positioning mechanism 22 locks the top plate 222 under the drive of the second cylinder 224, and pushes the base plate 221 back to its original position downward under the drive of the first cylinder 223.

[0065] S6. The stator fixing assembly 63 descends to the outside of the stator, and its stator clamping block 632 and limiting device 635 fix the stator in the circumferential and vertical directions. The guide pin 643 of the guide device 64 is pushed upward by the guide drive cylinder 641 to abut against the rotor shaft end, and moves downward as the rotor end cover moves down.

[0066] S7. The first step 6531 of the stepped support mechanism 65 moves forward under the drive of the support drive cylinder 654. The first step 6531 moves to the bottom of the lower end bearing of the rotor to support the bearing.

[0067] S8. After the lower end of the rotor shaft is installed and fitted with the bearing, the first step 6531 of the stepped support mechanism 65 is driven by the support drive cylinder 654 to retract backward, so that the second step 6532 is located below the stator edge, forming support for the lower edge of the stator; the press head 62 continues to press down until the rotor is completely pressed into the stator, and the end cover is sleeved and installed on the upper edge of the stator, and the assembly is completed.

[0068] The key design feature of this invention is that by integrating the rotor end cover conveying mechanism, positioning mechanism, heating mechanism, stator conveying mechanism, pressing mechanism, and transfer mechanism onto a frame to form a stator and rotor assembly device, this assembly device employs a lifting and positioning mechanism with a movable top plate to protect the lifting and positioning mechanism and conveying mechanism from damage during material handling, thus extending the service life of the mechanism. When the rotor is inserted into the stator, the stator is first fixed circumferentially and vertically, making it easier to center the rotor during installation and resulting in faster and more precise assembly. Furthermore, a stepped support mechanism is incorporated into the pressing mechanism, providing individual support structures for each mating part of the rotor end cover and stator during the pressing process, improving assembly accuracy and stability, and achieving complete assembly.

[0069] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A stator and rotor assembly device, characterized in that: The system includes a frame, a rotor end cover conveying mechanism mounted on the frame, a positioning mechanism for rotating and positioning the rotor end cover, a heating mechanism for heating the rotor end cover, a stator conveying mechanism for feeding the stator, a pressing mechanism for pressing the rotor end cover onto the stator, and a transfer mechanism for transferring the rotor end cover from the heating mechanism to the pressing mechanism. A worktable is provided on the frame; the rotor end cover conveying mechanism and the stator conveying mechanism are arranged parallel to each other on the worktable; the positioning mechanism and the heating mechanism are arranged along the conveying direction of the rotor end cover conveying mechanism; the pressing mechanism is located at the end of the stator conveying mechanism; and the transfer mechanism connects the heating mechanism and the pressing mechanism. The positioning mechanism includes a positioning bracket, a rotary drive motor, a drive ring, a displacement sensor, and a lifting drive device. The positioning bracket is installed on the side of the rotor end cover conveying mechanism, the lifting drive device is installed on the top of the positioning bracket, the rotary drive motor is installed at the output end of the lifting drive device, the drive ring is installed on the shaft end of the rotary drive motor, and the displacement sensor is located on the side of the drive ring and faces the side wall of the rotor end cover. The heating mechanism includes a heating bracket, a high-frequency heating coil that can be lifted and lowered on the heating bracket, and a lifting drive cylinder that drives the high-frequency heating coil to rise and fall on the heating bracket. The lifting drive cylinder is mounted on the heating bracket, and the high-frequency heating coil is mounted on the output end of the lifting drive cylinder. The rotor end cover conveying mechanism is provided with a ship plate for supporting the rotor end cover, and a lifting and positioning mechanism for positioning and lifting the ship plate is provided below the rotor end cover conveying mechanism. The lifting and positioning mechanism includes a base plate, a top plate that is movably mounted on the base plate, a first cylinder for driving the base plate and the top plate to rise and fall, and a second cylinder for locking the base plate and the top plate together. Multiple ball bearings are provided between the base plate and the top plate, and a pin for positioning on the top plate is provided. The shaft end of the first cylinder is connected to the base plate. The second cylinder is mounted on the base plate, and a locking pin that can pass through the base plate and the top plate is installed on the shaft end of the second cylinder. The transfer mechanism includes a transfer bracket that can be raised and lowered relative to the frame, a material picking device, and a longitudinal drive assembly that drives the material picking device to reciprocate between the heating mechanism and the pressing mechanism. The transfer bracket is longitudinally positioned above the rotor end cover conveying mechanism and the stator conveying mechanism. The longitudinal drive assembly is mounted on the transfer bracket. The material picking device is mounted on the output end of the longitudinal drive assembly, and a ring pressing part for pressing the end cover is provided around the material picking device. The pressing mechanism includes a pressing electric cylinder, a pressing head, a stator fixing assembly, and a pressing bracket. The pressing electric cylinder is vertically installed above the pressing bracket, the pressing head is installed on the output end of the pressing electric cylinder, and the stator fixing assembly is installed below the pressing bracket and faces the pressing head.

2. The stator and rotor assembly equipment according to claim 1, characterized in that: The positioning bracket is provided with an adjustment device on its side to keep the pins on the rotor end cover parallel to the conveying direction of the rotor end cover conveying mechanism. The adjustment device includes an adjustment rod arranged parallel to the conveying direction of the rotor end cover and an adjustment cylinder that drives the adjustment rod toward the rotor end cover. The adjustment rod is installed on the shaft end of the adjustment cylinder.

3. The stator and rotor assembly equipment according to claim 1, characterized in that: The stator fixing assembly includes a fixing plate, two stator clamping blocks located on the fixing plate, a clamping drive cylinder that drives the two stator clamping blocks to close or open to clamp or release the stator, and a positioning and lifting drive cylinder that drives the fixing plate to rise and fall. The two stator clamping blocks are mounted on the output end of the clamping drive cylinder. Limiting devices for preventing vertical movement of the stator are respectively provided on the two clamping blocks. The limiting devices include limiting blocks and limiting drive cylinders that drive the limiting blocks to move back and forth. The limiting drive cylinders are mounted on the stator clamping blocks, and the limiting blocks are mounted on the shaft end of the limiting drive cylinders and located between the two stator clamping blocks. The output end of the positioning and lifting drive cylinder is connected to the fixing plate.

4. The stator and rotor assembly equipment according to claim 3, characterized in that: The pressing mechanism also includes a guiding device located inside the frame. The guiding device includes a guiding drive cylinder, a guiding plate, and a guide pin that can be lifted and mounted on the guiding plate. The output end of the guiding drive cylinder is connected to the guiding plate, and the guide pin is vertically mounted on the guiding plate and is located between the two stator clamping blocks.

5. The stator and rotor assembly equipment according to claim 1, characterized in that: The pressing mechanism also includes a stepped support mechanism located below the stator conveying mechanism. The stepped support mechanism includes a support plate, a positioning boss, a stepped block, and a support driving cylinder that drives the stepped block to move back and forth to change the support position. The positioning boss is installed in the middle of the support plate, the stepped block is laterally movable on the side of the support plate, and the shaft end of the support driving cylinder is connected to the stepped block.

6. The stator and rotor assembly equipment according to claim 5, characterized in that: The stepped support mechanism has two sets of stepped blocks and a support drive cylinder, which are symmetrically distributed on both sides of the support plate. Step notches are provided on both sides of the support plate corresponding to the stepped blocks, and the stepped blocks can be moved back and forth in the step notches. The stepped block includes a first stepped part for supporting the rotor bearing and a second stepped part for supporting the lower end of the stator, and the first stepped part and the second stepped part are integrally connected.

7. An assembly method for use in the stator and rotor assembly equipment as described in any one of claims 1-6, characterized in that: It includes the following steps, S1. The rotor end cover conveying mechanism feeds the rotor end cover to the positioning mechanism; S2. The positioning mechanism drives the rotor end cover to rotate until the displacement sensor detects that it is in position and then stops rotating. S3. The rotor end cover conveying mechanism conveys the rotor end cover to the heating mechanism. The high-frequency heating coil of the heating mechanism descends to cover the end cover and heats it to the predetermined temperature. S4. After the rotor end cover is heated, the high-frequency heating coil returns to its original position. The first cylinder of the lifting and positioning mechanism drives the base plate and the top plate to lift the ship plate. At the same time, the second cylinder drives the locking pin to exit the top plate, so that the top plate can move relative to the base plate. The material picking device of the transfer mechanism moves to the top of the ship plate to pick up the rotor end cover and moves it to the pressing mechanism. S5. The locking pin of the lifting and positioning mechanism locks the top plate under the drive of the second cylinder, and pushes the base plate and the top plate back to their original positions under the drive of the first cylinder. S6. The stator fixing assembly descends to the outside of the stator, and its stator clamping block and limiting device fix the stator in the circumferential and vertical directions. The guide pin of the guide device is pushed upward by the guide drive cylinder to abut against the rotor shaft end, and moves downward as the rotor end cover moves downward. S7. The first step of the stepped support mechanism moves forward under the drive of the support drive cylinder. The first step moves to the bottom of the lower bearing of the rotor to support the bearing. S8. After the lower end of the rotor shaft is assembled with the bearing, the first step of the stepped support mechanism is pushed back by the support drive cylinder, so that the second step is located below the stator edge and forms support for the stator edge; the press head continues to press down until the rotor is completely pressed into the stator, and the end cover is sleeved and installed on the upper edge of the stator, and the assembly is completed.

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