Automatic positioning device for motor rotor core laminations

Abstract

The present invention relates to the field of motor manufacturing technology, and specifically to an automatic positioning device for motor rotor core laminations, comprising a placing table with a vertical axis that can rotate around its axis, a positioning axis coaxial with the placing table is provided at the center position of the placing table, and positioning parts distributed circumferentially along the positioning axis are provided on the placing table. When silicon steel sheets are stacked on the placing table, the side of the positioning part facing downward with the axis of the placing table is located in the winding groove of the silicon steel sheet, and the side of the positioning part facing the axis of the placing table has two expansion parts that can respectively abut on both sides of the winding groove when the placing table rotates. The present application can coaxially position all silicon steel sheets, improve stacking efficiency, and reduce labor and time costs. The two expansion parts in the rotating state of the placing table are tightly fitted with both sides of the winding groove, and the positioning accuracy of the silicon steel sheet is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of motor manufacturing, and in particular to an automatic positioning device for motor rotor core laminations. Background Art

[0002] The iron core of the motor stator and rotor is generally made of stacked stamping sheets. The motor stamping sheets are usually stamped silicon steel sheets. Motor stamping sheets of different specifications are suitable for the stators and rotors of motors of different powers. Their main functions are magnetic conduction, coil fixation, and heat dissipation. After the stamping sheets are stamped individually, the multiple layers of stamping sheets are riveted or welded into one. During the stacking process, it is necessary to ensure that the rivet holes or welding holes of each layer of stamping sheets are aligned. Since each motor stamping sheet is formed individually, the positions of the rivet holes or welding holes of each stamping sheet are scattered and disordered, and the stamping sheets need to be stacked neatly.

[0003] In actual production and manufacturing, the actual operation of stacking motor punching sheets often has the following problems: when manually stacking motor punching sheets, the motor punching sheets need to be threaded during the stacking process, and the rivet holes or welding holes of each layer of motor punching sheets need to be aligned. When placing the punching sheets during the stacking process, the stacked punching sheets are easily messed up, which makes the manual stacking efficiency low and cannot meet the requirements of motor punching sheet stacking in actual production; when stacking motor punching sheets, the existing motor punching sheet stacking equipment usually aligns the rivet holes or welding holes first, and then threads the center of the holes. The stacking process is cumbersome, and only one motor punching sheet can be stacked at a time, and the stacking efficiency is low. Summary of the Invention

[0004] In response to the above problems, an automatic positioning device for motor rotor core laminations is provided. The device stacks the silicon steel sheets on the top of the placement table in an unpositioned state, and the positioning pieces can be inserted into the winding grooves of the silicon steel sheets. By rotating the placement table, the two expansion pieces on the positioning pieces are expanded under the action of the rotating centrifugal force and respectively abut against the two sides of the winding grooves, thereby enabling all the silicon steel sheets to be coaxially positioned, thereby solving the problem of low efficiency of existing manual stacking.

[0005] In order to solve the problems of the prior art, the present invention provides an automatic positioning device for motor rotor core laminations, comprising a placing table with a vertical axis and capable of rotating around its axis, a positioning axis coaxial with the placing table is provided at the center position of the placing table, and positioning pieces distributed circumferentially along the positioning axis are provided on the placing table. When silicon steel sheets are stacked on the placing table, the side of the positioning piece facing downward with the axis of the placing table is located in the winding groove of the silicon steel sheet, and the side of the positioning piece facing the axis of the placing table has two expansion pieces that can respectively abut on both sides of the winding groove when the placing table rotates. When the placing table is stationary, the positioning piece can be inserted into the winding groove of the silicon steel sheet along the longitudinal direction.

[0006] Preferably, the expansion piece includes two abutment plates rotatably connected to the positioning piece, and a centrifugal block is provided in the positioning piece, which can radially move away from the positioning axis when the placement table rotates. The centrifugal block is transmission-connected to the abutment plates. When the centrifugal block moves away from the positioning axis, the two abutment plates open and abut on both sides of the laminated winding groove.

[0007] Preferably, a connecting rod rotatably connected to the outer side of the centrifugal block is provided, and the other end of the connecting rod is rotatably connected to the outer side of the abutment plate.

[0008] Preferably, an elastic reset component is provided in the positioning member, and the elastic reset component is connected to the centrifugal block. When the rotating seat is stationary, the elastic reset component guides the centrifugal block to move toward the axis of the rotating seat for reset.

[0009] Preferably, a thin plate passing through the two abutment plates is provided on the side of the centrifugal block facing the axis of the downward rotating seat, and a protrusion located between the two abutment plates is provided at one end of the thin plate. The protrusion abuts against the opposite surfaces of the two abutment plates. When the protrusion moves in a direction away from the axis of the rotating seat, the protrusion guides the two abutment plates to open outward.

[0010] Preferably, an elastic retracting element connected to the positioning piece is provided on the outer sides of the two abutting pieces. When the rotating seat is in a stationary state, the two abutting pieces abut against each other under the action of the elastic force on their outer sides.

[0011] Preferably, the positioning member is radially slidably arranged on the placement table, and the bottom end of the placement table is provided with an adjustment disk that can rotate relative to it, and the adjustment disk is provided with an adjustment groove deviating from its radial direction, and the bottom end of the positioning member is provided with an adjustment column extending downward and slidingly cooperating with the adjustment groove.

[0012] Preferably, the positioning device also includes a motor arranged at the bottom of the placing table, and a transmission shaft coaxial with the placing table is provided at the bottom end of the placing table, the transmission shaft is coaxially fixedly connected with the output shaft of the motor, the adjusting disk and the transmission shaft are slidably matched, and an elastic pushing element is provided on the transmission shaft that can make the adjusting disk elastically abut against the bottom end of the placing table, the bottom end of the placing table is provided with teeth and grooves distributed along its circumference, and the top of the adjusting disk is provided with a rack that can engage with the teeth and grooves.

[0013] Preferably, a hydraulic cylinder is also provided on the positioning member, the output shaft of the hydraulic cylinder is connected to the centrifugal block, and an isobaric cylinder is also provided at the bottom of the placement table. The isobaric cylinder has an isobaric cavity, and all the hydraulic cylinders are connected to the isobaric cavity through hydraulic flexible tubes.

[0014] Preferably, the isobaric cylinder also has a pressure relief chamber, the pressure relief chamber and the isobaric chamber are separated by a piston ring, a one-way airflow channel is provided on the transmission shaft, the pressure relief chamber is connected to the one-way airflow channel through a pressure relief flexible tube, and a pressure relief component is also provided in the one-way airflow channel, which is used to guide outside air into the pressure relief chamber to reset the output shaft of the hydraulic cylinder.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The present application stacks the silicon steel sheets on top of the placement table in an unpositioned state, and the positioning piece can be inserted into the winding groove of the silicon steel sheet when the placement table is not rotated. By rotating the placement table, the two expansion pieces on the positioning piece are unfolded under the action of the rotating centrifugal force and respectively abut on both sides of the winding groove, thereby being able to coaxially position all the silicon steel sheets, thereby improving the stacking efficiency and reducing the labor cost and time cost. Secondly, because the two expansion pieces in the rotation state of the placement table are tightly fitted with both sides of the winding groove, the positioning accuracy of the silicon steel sheet is higher, thereby improving the performance and reliability of the motor, reducing the difficulty of operation and the error rate, and making the entire production process more stable and reliable; and through the hydraulic cylinder, the isobaric cylinder and the one-way airflow channel on the transmission shaft, the centrifugal block can be locked after the placement table is rotated, thereby preventing the silicon steel sheets from being scattered and stacked again due to inertia after the placement table is stationary. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a three-dimensional diagram of an automatic positioning device for motor rotor core laminations.

[0018] Figure 2 The present invention is a three-dimensional cross-sectional view of an automatic positioning device for motor rotor core laminations.

[0019] Figure 3 The present invention is a cross-sectional view of an automatic positioning device for motor rotor core laminations.

[0020] Figure 4 yes Figure 3 A partial enlarged view of point A.

[0021] Figure 5 yes Figure 3 A partial enlarged view of point B.

[0022] Figure 6 The diagram is a top view of an automatic positioning device for motor rotor core laminations.

[0023] Figure 7 The present invention is a schematic diagram of a first embodiment of a positioning member in an automatic positioning device for a motor rotor core lamination, in a retracted state in a winding slot.

[0024] Figure 8 The present invention is a schematic diagram of a first embodiment of a positioning member in an automatic positioning device for motor rotor core laminations in a state of being expanded in a winding slot.

[0025] Figure 9 The present invention is a schematic diagram of a second embodiment of a positioning member in an automatic positioning device for motor rotor core laminations in a retracted state in a winding slot.

[0026] Figure 10 The present invention is a schematic diagram of an automatic positioning device for motor rotor core laminations when placing a stack of silicon steel sheets.

[0027] Figure 11 The present invention is a three-dimensional exploded view of a placement table and an adjustment disk in an automatic positioning device for motor rotor core laminations from a first perspective.

[0028] Figure 12 The present invention is a three-dimensional exploded view of a placement table and an adjustment disk in an automatic positioning device for motor rotor core laminations from a second viewing angle.

[0029] The numbers in the figure are: 1. silicon steel sheet; 11. winding groove; 2. placing table; 21. tooth groove; 3. positioning part; 31. centrifugal block; 32. connecting rod; 331. positioning rod; 332. return spring; 34. thin plate; 341. protrusion; 35. adjusting column; 4. expansion piece; 5. elastic gathering element; 61. adjusting disk; 611. adjusting groove; 612. rack; 62. motor; 63. transmission shaft; 631. DC channel; 632. pressure release channel; 633. conical block; 634. sliding column; 635. limiting ring; 636. pressure spring; 64. elastic pushing element; 66. hydraulic cylinder; 67. isobaric cylinder; 671. isobaric chamber; 672. pressure release chamber; 673. piston ring; 68. hydraulic hose; 69. pressure release hose; 7. positioning shaft; 8. bottom plate. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1 、 Figure 2 and Figure 3 As shown, this application provides:

[0032] An automatic positioning device for the rotor core laminations of a motor 62 includes a placement table 2 with a vertical axis and capable of rotating around its axis. A positioning shaft 7 coaxial with the placement table 2 is provided at the center position of the placement table 2. Positioning members 3 distributed circumferentially along the positioning shaft 7 are provided on the placement table 2. When silicon steel sheets 1 are stacked on the placement table 2, the positioning members 3 are located in the winding groove 11 of the silicon steel sheets 1 on the side of the placement table 2 axis facing downward. The positioning members 3 have two expansion members 4 on the side of the placement table 2 axis that can respectively abut against the two sides of the winding groove 11 when the placement table 2 rotates. When the placement table 2 is stationary, the positioning members 3 can be inserted into the winding groove 11 of the silicon steel sheets 1 along the longitudinal direction.

[0033] The positioning shaft 7 can pre-position the silicon steel sheet 1. The diameter of the positioning shaft 7 is slightly smaller than the inner diameter of the silicon steel sheet 1, so that the silicon steel sheet 1 can pass through the positioning shaft 7 and be placed on the placement table 2. During this process, the positioning piece 3 can be inserted into the winding groove 11 from the bottom of the winding groove 11. The two expansion pieces 4 can abut against each other when the placement table 2 is stationary, so that the two expansion pieces 4 can be inserted into the winding groove 11, and the placement table 2 is guided to rotate so that the two expansion pieces 4 can open and abut against the two ends of the winding groove 11 respectively, so that the two expansion pieces 4 on all the positioning pieces 3 can abut and position the silicon steel sheet 1, thereby facilitating the subsequent connection of adjacent silicon steel sheets 1.

[0034] In this embodiment, the silicon steel sheets 1 are stacked on top of the placement table 2 in an unpositioned state, and the positioning member 3 can be inserted into the winding groove 11 of the silicon steel sheet 1 when the placement table 2 is not rotated. By rotating the placement table 2, the two expansion members 4 on the positioning member 3 are unfolded under the action of the rotating centrifugal force and respectively abut on both sides of the winding groove 11, thereby being able to coaxially position all the silicon steel sheets 1, thereby improving the stacking efficiency and reducing the labor cost and time cost. Secondly, because the two expansion members 4 in the rotating state of the placement table 2 are tightly fitted with both sides of the winding groove 11, the positioning accuracy of the silicon steel sheet 1 is higher, thereby improving the performance and reliability of the motor 62, reducing the difficulty of operation and the error rate, and making the entire production process more stable and reliable.

[0035] like Figure 6 、 Figure 7 . Figure 8 and Figure 9 As shown, the expansion member 4 includes two abutment plates rotatably connected to the positioning member 3. A centrifugal block 31 is provided in the positioning member 3, which can radially move away from the positioning shaft 7 when the placement table 2 rotates. The centrifugal block 31 is transmission-connected to the abutment plates. When the centrifugal block 31 moves away from the positioning shaft 7, the two abutment plates open and abut on both sides of the laminated winding groove 11.

[0036] The expansion member 4 is composed of two abutment pieces which are tightly connected to the positioning member 3. The two abutment pieces are the main working parts of the expansion member 4 and their function is to open quickly when needed to stabilize and fix the lamination winding groove 11.

[0037] The positioning member 3 includes a centrifugal weight 31. When the placement table 2 rotates, the centrifugal weight 31 will move radially away from the positioning shaft 7 due to its own mass. The centrifugal weight 31 is connected to the two abutment plates via a transmission mechanism. This transmission mechanism ensures that the movement of the centrifugal weight 31 can be quickly and accurately converted into the movement of the abutment plates. When the centrifugal weight 31 moves away from the positioning shaft 7 due to rotation, it drives the two abutment plates to open outward through the transmission mechanism.

[0038] The opening action of the abutment pieces is rapid and stable. Once they are opened to the appropriate angle, they will tightly abut on both sides of the lamination winding groove 11. This abutment not only stabilizes the position of the lamination winding groove 11, but also prevents it from shaking or deflecting during rotation.

[0039] like Figure 7 and Figure 8 As shown, a connecting rod 32 rotatably connected to the centrifugal block 31 is provided on the outer side thereof, and the other end of the connecting rod 32 is rotatably connected to the outer side of the abutting piece.

[0040] As a first embodiment for the transmission connection between the centrifugal weight 31 and the abutment plate, to achieve precise control between the centrifugal weight 31 and the abutment plate, a connecting rod 32 is provided on the outside of the centrifugal weight 31, which is rotatably connected to the centrifugal weight 31. The connecting rod 32 connects the centrifugal weight 31 and the abutment plate, ensuring that the movement between them is synchronized.

[0041] The other end of the connecting rod 32 is rotatably connected to the outer side of the abutment plate. This rotational connection allows the movement of the connecting rod 32 to be directly transmitted to the abutment plate, thereby driving the abutment plate to perform corresponding movements. When the centrifugal weight 31 rotates away from the positioning shaft 7, the connecting rod 32 rotates accordingly, and the rotational connection further pushes the abutment plate outward.

[0042] The opening action of the abutment pieces is rapid and stable. Once they are opened to the appropriate angle, they will tightly abut on both sides of the lamination winding groove 11. This abutment not only stabilizes the position of the lamination winding groove 11, but also prevents it from shaking or deflecting during rotation.

[0043] like Figure 7 and Figure 8 As shown, the positioning member 3 is provided with an elastic reset component, which is connected to the centrifugal block 31. When the rotating seat is stationary, the elastic reset component guides the centrifugal block 31 to move toward the axis of the rotating seat for reset.

[0044] The elastic reset assembly includes a positioning rod 331 and a reset spring 332 . The positioning rod 331 is fixedly arranged on the positioning member 3 along the sliding direction of the centrifugal block 31 . The positioning rod 331 slides through the centrifugal block 31 . The reset spring 332 is sleeved on the positioning rod 331 .

[0045] In order to ensure that the device can quickly return to its initial state after rotation stops, an elastic reset assembly is set inside the positioning member 3. Its main function is to ensure that the centrifugal weight 31 can quickly return to its original state when the rotating base is stationary. This elastic reset assembly includes two parts: a positioning rod 331 and a reset spring 332.

[0046] Positioning rod 331 is fixedly mounted on positioning member 3 along the sliding direction of centrifugal mass 31. Positioning rod 331 provides a stable sliding path for centrifugal mass 31, ensuring its stability and accuracy during movement. A sliding groove matching positioning rod 331 is designed within centrifugal mass 31, allowing positioning rod 331 to slide through centrifugal mass 31, thereby providing stable guidance for centrifugal mass 31.

[0047] The return spring 332 is mounted on the positioning rod 331, with one end fixedly connected to the positioning member 3 and the other end in contact with the centrifugal weight 31. When the centrifugal weight 31 rotates away from the positioning shaft 7, the return spring 332 is compressed and stores energy. Once the rotating seat stops rotating, the return spring 332 releases the stored energy, pushing the centrifugal weight 31 along the positioning rod 331 toward the rotating seat axis, thereby quickly returning it to its original position.

[0048] This design allows the entire device to quickly switch between rotating and stationary states, improving its flexibility and stability. Whether in high-speed rotation or stationary mode, the extension maintains a stable grip on the lamination winding slots 11, ensuring the proper functioning of the entire device. Furthermore, the inclusion of an elastic return assembly increases the device's service life and reliability.

[0049] like Figure 9 As shown, a thin plate 34 passing through two abutment sheets is provided on one side of the centrifugal block 31 facing downwardly toward the axis of the rotating seat, and a protrusion 341 located between the two abutment sheets is provided at one end of the thin plate 34. The protrusion 341 abuts against the opposite surfaces of the two abutment sheets. When the protrusion 341 moves in a direction away from the axis of the rotating seat, the protrusion 341 guides the two abutment sheets to open outward.

[0050] As a second embodiment for transmission connection between the centrifugal block 31 and the abutment plate, a protrusion 341 is provided at one end of the thin plate 34, and this protrusion 341 is located between the opposite surfaces of the two abutment plates. The function of the protrusion 341 is to act as a wedge-shaped mechanism, which is used to push the abutment plates to open outward when the centrifugal block 31 moves. Specifically, when the centrifugal block 31 moves away from the axis of the rotating seat due to rotation, it will drive the thin plate 34 to move together. The movement of the thin plate 34 causes the protrusion 341 to move in a direction away from the axis of the rotating seat, and the movement of the protrusion 341 will guide the two abutment plates to gradually open outward.

[0051] During this process, the bump 341 maintains close contact with the opposing surface of the abutment sheet, ensuring force transmission and precise movement. The shape and size of the bump 341 are carefully calculated and optimized to ensure sufficient force and stability when pushing the abutment sheet open.

[0052] When the centrifugal weight 31 returns to its original position, that is, when it approaches the axis of the rotating seat, the protrusion 341 also moves back to its original position. During this process, the contact between the protrusion 341 and the abutment plate gradually decreases, and eventually completely breaks away from the contact. At this point, the abutment plate gradually returns to its original position due to its own elasticity or other reset mechanism, preparing for the next opening action.

[0053] like Figure 9 As shown, elastic retracting elements 5 connected to the positioning member 3 are provided on the outer sides of the two abutting pieces. When the rotating seat is in a stationary state, the two abutting pieces abut against each other under the action of elastic force on their outer sides.

[0054] In the design of the positioning member 3, to ensure that the two abutting pieces can fit tightly together when they do not need to be opened, elastic retractable elements 5 are provided on the outside of the two abutting pieces and connected to the positioning member 3. These elastic retractable elements 5 are typically made of an elastic material such as a spring or elastic rubber. They are carefully installed on the outside of the abutting pieces, with one end connected to the abutting piece and the other end fixed to the positioning member 3.

[0055] When the rotating base is stationary, the elastic retracting element 5 will, under its own elastic force, pull the two contact pieces together tightly, making them abut each other. This design ensures that the contact pieces can remain closed in the absence of external forces, preventing accidental opening due to vibration or other factors.

[0056] When the rotating base begins to rotate, the centrifugal mass 31 moves outward due to the centrifugal effect. Driven by the thin plate 34, the protrusion 341 drives the abutment piece outward. During this process, the elastic gathering element 5 is stretched and stores energy. Once the rotating base stops rotating, the centrifugal mass 31 and the protrusion 341 cease pushing on the abutment piece. At this time, the elastic gathering element 5 quickly releases the stored energy, pulling the abutment piece back into position and making it fit tightly together again.

[0057] This design not only improves the stability and reliability of the extension, but also ensures that the abutment plate can quickly switch between rotation and static states. Whether in high-speed rotation or static state, the extension can maintain a stable fixation on the lamination winding groove 11, providing a strong guarantee for the normal operation of the entire equipment.

[0058] like Figure 11 and Figure 12 As shown, the positioning member 3 is radially slidably arranged on the placement table 2, and the bottom end of the placement table 2 is provided with an adjustment disk 61 that can rotate relative to it, and the adjustment disk 61 is provided with an adjustment groove 611 that deviates from its radial direction, and the bottom end of the positioning member 3 is provided with an adjustment column 35 that extends downward and slides with the adjustment groove 611.

[0059] Both the adjustment disk 61 and the rotating table are provided with avoidance openings, so that after the silicon steel sheet 1 is positioned, the manipulator can pass through the avoidance openings to clamp and lift the positioned silicon steel sheet 1 .

[0060] The positioning member 3 is arranged to slide radially on the placement table 2, which allows the positioning member 3 to be radially moved and adjusted as needed. To achieve this function, a sliding track or similar guide mechanism may be used between the placement table 2 and the positioning member 3 to ensure the stability and accuracy of the positioning member 3 during movement.

[0061] At the bottom end of the placement platform 2, an adjustment disk 61 is provided, which can rotate relative to the placement platform 2. This adjustment disk 61 is designed to allow the user to influence the movement and position of the positioning member 3 by rotating it. The connection between the adjustment disk 61 and the placement platform 2 may use a bearing or similar rotating mechanism to ensure smooth rotation of the adjustment disk 61.

[0062] Adjustment disk 61 is provided with an adjustment slot 611, which is offset from its radial direction. Adjustment slot 611 mates with adjustment post 35 at the bottom end of positioning member 3. Adjustment post 35 is a key component of positioning member 3, extending downward and slidingly engaging adjustment slot 611. As adjustment disk 61 rotates, the trajectory of adjustment slot 611 guides adjustment post 35 to slide accordingly, thereby driving radial movement of positioning member 3.

[0063] like Figure 11 and Figure 12 As shown, the positioning device also includes a motor 62 arranged at the bottom of the placement table 2, and a transmission shaft 63 coaxial with the placement table 2 is provided at the bottom end of the placement table 2. The transmission shaft 63 is coaxially fixedly connected with the output shaft of the motor 62, and the adjustment disk 61 is slidably fitted with the transmission shaft 63. The transmission shaft 63 is provided with an elastic pushing element 64 that can make the adjustment disk 61 elastically abut against the bottom end of the placement table 2. The bottom end of the placement table 2 is provided with teeth 21 distributed along its circumference, and the top of the adjustment disk 61 is provided with a rack 612 that can be engaged with the teeth 21.

[0064] The positioning device further includes a base plate 8 , a motor 62 is disposed at the bottom of the base plate 8 , and a transmission shaft 63 is rotatably disposed on the base plate 8 .

[0065] The positioning device not only includes a positioning member 3 mounted on the placement table 2 but also an adjustment system driven by a motor 62. Motor 62 is located at the bottom of the placement table 2 and serves as the power source for the entire adjustment system. The output shaft of motor 62 is coaxially and fixedly connected to a transmission shaft 63 at the bottom of the placement table 2. This allows the rotation of motor 62 to be directly transmitted to transmission shaft 63, driving the placement table 2 to rotate.

[0066] The transmission shaft 63 is coaxial with the placement table 2 to ensure the stability of the rotation. The adjustment disk 61 is connected to the transmission shaft 63 in a sliding manner, which means that the adjustment disk 61 can move along the axis of the transmission shaft 63 while maintaining synchronization with the rotation of the transmission shaft 63.

[0067] To ensure that the adjustment disk 61 always closely abuts the bottom end of the placement table 2 during rotation, an elastic pushing element 64 is provided on the transmission shaft 63. This elastic pushing element 64 is a spring or similar elastic component that always applies an upward thrust to the adjustment disk 61, making it closely fit the bottom end of the placement table 2.

[0068] At the bottom end of the placement table 2, there are a series of teeth and grooves 21 distributed along its circumference. These teeth and grooves 21 are used to engage with the rack 612 on the adjustment disk 61 to achieve precise positioning and rotation control. The top of the adjustment disk 61 is provided with a rack 612 that can engage with the teeth and grooves 21. When the adjustment plate is pressed down relative to the placement table 2, the rack 612 can withdraw from the teeth and grooves 21, thereby allowing the adjustment disk 61 to rotate relative to the placement table 2, thereby adjusting the distance between the positioning member 3 and the positioning shaft 7, and when the downward force on the adjustment disk 61 stops, the adjustment disk 61 moves upward under the action of the elastic pushing element 64, so that the rack 612 engages with the teeth and grooves 21, thereby preventing the adjustment disk 61 from rotating relative to the placement table 2.

[0069] like Figure 4 and Figure 5 As shown, a hydraulic cylinder 66 is also provided on the positioning member 3, and the output shaft of the hydraulic cylinder 66 is connected to the centrifugal block 31. An isobaric cylinder 67 is also provided at the bottom of the placement table 2. The isobaric cylinder 67 has an isobaric chamber 671. All the hydraulic cylinders 66 are connected to the isobaric chamber 671 through hydraulic flexible tubes.

[0070] The output shaft of the hydraulic cylinder 66 is directly connected to the centrifugal mass 31. By controlling the piston movement of the hydraulic cylinder 66, all the hydraulic cylinders 66 are connected to the isobaric cylinder 67, so that the pressure in all the hydraulic cylinders 66 can be released into the isobaric chamber 671, so that all the centrifugal masses 31 can move along the box body to ensure precise positioning.

[0071] like Figure 4 and Figure 5 As shown, the isobaric cylinder 67 also has a pressure relief chamber 672, and the pressure relief chamber 672 and the isobaric chamber 671 are separated by a piston ring 673. A one-way airflow channel is provided on the transmission shaft 63, and the pressure relief chamber 672 is connected to the one-way airflow channel through a pressure relief flexible tube. A pressure relief component is also provided in the one-way airflow channel, and the pressure relief component is used to guide external air into the pressure relief chamber 672 to reset the output shaft of the hydraulic cylinder 66.

[0072] The one-way airflow channel includes a direct current channel 631 coaxial with the transmission shaft 63, and a pressure relief channel 632 extending radially along the transmission rod. The pressure relief channel 632 includes a conical section connected to the direct current channel 631, and an installation section located at the narrow section of the conical end. The anti-pressure assembly includes a conical block 633 coaxially slidingly arranged in the conical section, and a sliding column 634 connected to the narrow end of the conical block 633. A limiting ring 635 is provided at the outer end of the sliding column 634. Only a pressure spring 636 is sleeved on the sliding column 634. The pressure spring 636 is located between the limiting ring 635 and the circumferential surface of the transmission shaft 63.

[0073] In order to lock the centrifugal block 31 in its position away from the positioning shaft 7 so that the abutment sheet can stably abut the side of the winding groove 11, it is necessary to lock the piston ring 673 in the isobaric cylinder 67 after the pressure in the pressure relief chamber 672 increases and the piston ring 673 moves. The gas in the isobaric chamber 671 is discharged outward through the one-way air flow channel, and the outside air cannot enter the pressure relief chamber 672 to ensure that the piston ring 673 cannot move. The air in the pressure relief chamber 672 enters the direct current channel 631 and acts on the conical block. On the conical surface of 633, when the pressure in the DC channel 631 is greater than the pressure of the pressure spring 636, the conical block 633 moves to the right to open the conical section, so that the DC channel 631 is connected to the outside world. When the placement table 2 stops rotating and the centrifugal block 31 needs to be reset, the limit ring 635 is pressed to open the conical section to connect the atmosphere and the DC channel 631. The air enters the pressure relief chamber 672 through the DC channel 631 to ensure that the piston ring 673 can move upward and the centrifugal block 31 is reset.

[0074] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An automatic positioning device for motor rotor core laminations, characterized in that: The invention comprises a placing table (2) with a vertical axis and capable of rotating around the axis, a positioning shaft (7) coaxial with the placing table (2) is provided at the center position of the placing table (2), and positioning members (3) distributed circumferentially along the positioning shaft (7) are provided on the placing table (2); when the silicon steel sheet (1) is stacked on the placing table (2), the positioning member (3) is located in the winding groove (11) of the silicon steel sheet (1) on the side of the placing table (2) axis facing downward, and the positioning member (3) has two expansion members (4) on the side of the placing table (2) axis that can respectively abut against the two sides of the winding groove (11) when the placing table (2) rotates; when the placing table (2) is in a stationary state, the positioning member (3) can be inserted into the winding groove (11) of the silicon steel sheet (1) along the longitudinal direction; The expansion member (4) includes two abutment plates rotatably connected to the positioning member (3); a centrifugal block (31) is provided in the positioning member (3) and can move radially away from the positioning shaft (7) when the placement table (2) rotates; the centrifugal block (31) is in transmission connection with the abutment plates; when the centrifugal block (31) moves away from the positioning shaft (7), the two abutment plates open and abut against both sides of the lamination winding groove (11); A connecting rod (32) is provided on the outer side of the centrifugal block (31) and is rotatably connected thereto, and the other end of the connecting rod (32) is rotatably connected to the outer side of the abutment plate; An elastic reset component is provided in the positioning member (3), and the elastic reset component is connected to the centrifugal block (31). When the rotating seat is stationary, the elastic reset component guides the centrifugal block (31) to move toward the axis of the rotating seat for reset.

2. The automatic positioning device for motor rotor core laminations according to claim 1, characterized in that: A thin plate (34) passing through two abutment sheets is provided on one side of the centrifugal block (31) facing the axis of the downward rotating seat. A protrusion (341) located between the two abutment sheets is provided at one end of the thin plate (34). The protrusion (341) abuts against opposite surfaces of the two abutment sheets. When the protrusion (341) moves in a direction away from the axis of the rotating seat, the protrusion (341) guides the two abutment sheets to open outward.

3. The automatic positioning device for motor rotor core laminations according to claim 2, characterized in that: An elastic retracting element (5) connected to the positioning member (3) is provided on the outer sides of the two abutting pieces. When the rotating seat is in a stationary state, the two abutting pieces abut against each other under the action of elastic force on their outer sides.

4. The automatic positioning device for motor rotor core laminations according to any one of claims 1 to 3, characterized in that: The positioning member (3) is radially slidably arranged on the placement platform (2); the bottom end of the placement platform (2) is provided with an adjustment disk (61) capable of rotating relative thereto; the adjustment disk (61) is provided with an adjustment groove (611) deviating from its radial direction; the bottom end of the positioning member (3) is provided with an adjustment column (35) extending downward and slidingly engaged with the adjustment groove (611).

5. The automatic positioning device for motor rotor core laminations according to claim 4, characterized in that: The positioning device further comprises a motor (62) arranged at the bottom of the placement platform (2); a transmission shaft (63) coaxial with the placement platform (2) is provided at the bottom end of the placement platform (2); the transmission shaft (63) is coaxially fixedly connected to the output shaft of the motor (62); the adjustment disk (61) and the transmission shaft (63) are slidably matched; the transmission shaft (63) is provided with an elastic pushing element (64) capable of causing the adjustment disk (61) to elastically abut against the bottom end of the placement platform (2); the bottom end of the placement platform (2) is provided with tooth grooves (21) distributed along its circumference; and the top end of the adjustment disk (61) is provided with a rack (612) capable of engaging with the tooth groove (21).

6. The automatic positioning device for motor rotor core laminations according to claim 4, characterized in that: The positioning member (3) is further provided with a hydraulic cylinder (66), the output shaft of which is connected to the centrifugal block (31). The bottom of the placement table (2) is further provided with an isobaric cylinder (67), which has an isobaric chamber (671). All the hydraulic cylinders (66) are connected to the isobaric chamber (671) through a hydraulic flexible tube.

7. The automatic positioning device for motor rotor core laminations according to claim 6, characterized in that: The isobaric cylinder (67) further comprises a pressure relief chamber (672), the pressure relief chamber (672) and the isobaric chamber (671) being separated by a piston ring (673), a one-way airflow channel being provided on the transmission shaft (63), the pressure relief chamber (672) being connected to the one-way airflow channel via a pressure relief flexible tube, and a pressure relief assembly being provided in the one-way airflow channel, the pressure relief assembly being used to guide outside air into the pressure relief chamber (672) so as to reset the output shaft of the hydraulic cylinder (66).

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