A double-station heated motor rotor assembly device

Abstract

The application provides a double-station heating motor rotor assembling device and belongs to the technical field of motor rotor assembly. The device comprises a rack, a workbench and a machine box. The rack comprises a base and a machine head above the base. The workbench is arranged on the base, and two machine boxes are arranged on the two sides of the rack. The two ends of the workbench are heating stations, and the middle part is a pressing station. Slides are arranged at the heating stations. A second translation mechanism is arranged on the workbench and used for driving the slides to slide. Heating coils are arranged on the machine boxes and used for heating the motor rotor. A pressing mechanism is arranged on the machine head and used for pressing the motor shaft into the motor rotor. Four first cylindrical bearings are arranged in the slides and partially protrude under the action of compression springs. The device can realize continuous heating and pressing assembly of the rotor, greatly shorten the waiting time between processes and improve the production efficiency of the rotor hot fitting assembly.

Description

Technical Field

[0001] This invention belongs to the field of motor rotor assembly technology, and specifically relates to a motor rotor assembly device with dual-station heating. Background Technology

[0002] An electric motor rotor typically consists of a motor shaft and a rotor body fitted over the motor shaft. During rotor manufacturing, the motor shaft needs to be installed into the shaft hole of the rotor body to complete the assembly. Currently, the industry commonly uses a heat-shrinking process, which involves heating the shaft hole of the rotor body to expand it, then cooling and shrinking it after the motor shaft is inserted, thus achieving a tight assembly.

[0003] Traditional rotor heat jacket heating methods mainly include furnace heating and flame heating. Furnace heating involves placing a batch of rotors into a furnace for heating, which has a long heating time, high energy consumption, large equipment size, and high production cost. Flame heating is a contact heating method, which poses fire safety hazards, and the rotor heating temperature is difficult to control precisely. Both of these methods are cumbersome to operate, time-consuming, labor-intensive, and inefficient, making them unsuitable for the needs of mass production.

[0004] Electromagnetic induction heating, with its advantages of rapid heating, high heating efficiency, and good temperature controllability, is gradually becoming the preferred alternative to traditional heating furnaces and flame heating. However, current induction heating equipment for large rotors typically only has a single heating station, heating only one rotor at a time. The next rotor can only be heated after the first rotor has been heated and transferred. In this process, the rotor heating and pressing assembly steps are performed sequentially, resulting in long waiting intervals and limiting the overall production cycle time. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies that only have a single electromagnetic induction heating station by providing a dual-station heating motor rotor assembly device, which can realize continuous heating and pressing assembly of the rotor, thereby improving the production efficiency of rotor thermal assembly.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A dual-station heating motor rotor assembly device includes a frame, a worktable, and a housing. The frame includes a base and a head located above the base. The worktable is fixedly mounted on the base, and two housings are located on opposite sides of the frame. The worktable has heating stations at both ends and a pressing station in the middle. Each heating station is equipped with a slide table, and the worktable has a second translation mechanism for driving the slide table to slide between the heating and pressing stations. Each slide table has a support sleeve for mounting the motor rotor. Each housing has a heating coil for heating the motor rotor. The head has a pressing mechanism for pressing the motor shaft into the motor rotor, located directly above the pressing station. The slide table has four first cylindrical bearings inside, with their axes horizontal and perpendicular to the sliding direction of the slide table. Each first cylindrical bearing protrudes slightly from the bottom surface of the slide table under the action of a compression spring.

[0007] Furthermore, the worktable has two support beams arranged side by side along its length; the slide is square, with a square limiting block at the bottom, the width of which matches the distance between the two support beams; the slide spans both support beams and is slidably connected to them, and the limiting block is positioned between the support beams.

[0008] Furthermore, each of the support beams is provided with a first stop at both ends for positioning the slide table to the heating station, and a second stop in the middle for positioning the slide table to the pressing station.

[0009] Furthermore, the width of each slide is different on both sides of the limiting block, and the second stop is disposed within the gap between the same side edges of the two slides.

[0010] Furthermore, horizontal slots are provided through both ends of the slide table, the slots being perpendicular to the sliding direction of the slide table and having a vertical oval cross-section; a floating shaft is provided in each slot, the diameter of the floating shaft being slightly smaller than the width of the slot, and the first cylindrical bearing is provided at both ends of each floating shaft; multiple vertical blind holes for inserting the compression spring are provided along the slots, the lower end of the blind holes being open and the upper end extending above the slots; the compression spring is compressed above the floating shaft; the first cylindrical bearing is located in a cavity communicating with the bottom of the slide table, and the distance between the slot and the bottom surface of the slide table is less than the radial cross-sectional height of the first cylindrical bearing; before the pressing mechanism operates, the compression spring supports the floating shaft on the lower wall of the slot; when the pressing mechanism operates, the first cylindrical bearing retracts into the slide table under pressure.

[0011] Furthermore, the second translation mechanism includes a second translation cylinder, which is a magnetically coupled rodless cylinder, and a slider on the cylinder body is a second cylinder slider; a connecting angle iron is provided at the bottom of the slide table, the horizontal part of the connecting angle iron is fixedly connected to the slide table, and the vertical part is close to the second cylinder slider; the vertical part is provided with a vertical groove; a plurality of second cylindrical bearings are provided on the second cylinder slider, all of which are located in the vertical groove, and the outer diameter of the second cylindrical bearing is slightly smaller than the groove width of the vertical groove.

[0012] Furthermore, the pressing mechanism includes a servo electric cylinder disposed inside the machine head, the telescopic rod of the servo electric cylinder extending vertically downward out of the machine head; the lower end of the telescopic rod is provided with a lower pressing sleeve for cooperating with the motor shaft.

[0013] Furthermore, a pressure sensor is installed inside the lower pressure sleeve.

[0014] Furthermore, each of the chassis is provided with a plate-shaped lifting platform on its upper side, and a lifting mechanism for driving the lifting platform is provided inside the chassis; the lifting mechanism includes a lifting cylinder and multiple guide shafts; the piston rod of the lifting cylinder is vertically upward and is fixedly connected to the center of the lifting platform after passing through the platform surface of the chassis; each of the guide shafts is vertically arranged and its top end is fixedly connected to the lifting platform; each of the guide shafts is fitted with a sliding sleeve that is fixedly connected to the platform surface of the chassis.

[0015] Furthermore, the lifting platform is provided with a first translation mechanism for driving the heating coil to move horizontally. The first translation mechanism includes a first translation cylinder and a guide rail. The coil support of the heating coil is slidably connected to the guide rail via a slider. The first translation cylinder is arranged parallel to the guide rail. The first translation cylinder is a magnetically coupled rodless cylinder, and the slider on the cylinder body is a first cylinder slider. The first cylinder slider is fixedly connected to the coil support.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention features two heating stations and a central pressing station on a worktable. A sliding table reciprocates across the worktable, allowing rotors at the two heating stations to be heated and pressed alternately. For production processes where the rotor heating time is 2-3 times the pressing time, while one rotor is being pressed, the other rotor is simultaneously heated at the other heating station. After pressing, the next rotor can be pressed immediately without a long wait. Compared to existing induction heating equipment that can only heat one rotor at a time, this invention enables continuous heating and pressing assembly of rotors, significantly reducing waiting time between processes and improving the production efficiency of rotor heat assembly.

[0017] This invention features a first cylindrical bearing, supported by a floating spring, at the bottom of the slide. In the non-pressing state, the compressed spring ejects the first cylindrical bearing from the bottom of the slide, allowing the slide to roll against the support beam via the bearing, significantly reducing frictional resistance during translation. During pressing, the downward pressure overcomes the spring force, causing the first cylindrical bearing to retract into the slide. The bottom surface of the slide then fully contacts the support beam, providing a large-area, stable support for withstanding the immense pressure during pressing. This effectively prevents deformation or damage to the slide due to localized stress, balancing smooth sliding with pressing strength.

[0018] This invention incorporates a vertical groove on the connecting angle iron between the second translation cylinder and the slide table, and a second cylindrical bearing positioned within the vertical groove on the slider of the second cylinder. This design ensures that while the second translation cylinder drives the slide table horizontally, it does not interfere with the slide table's vertical movement under the action of the compression spring. As the slide table moves up and down, the second cylindrical bearing rolls within the vertical groove, reducing friction between the two components while maintaining the slide table's vertical freedom. This allows the floating support and horizontal drive functions to operate independently.

[0019] The slide of the present invention has an asymmetrical width on both sides of the limiting block. The second stop is located within the distance between the edges of the two slides on the same side. Therefore, the second stop can achieve differentiated blocking and positioning of the two slides. The second stop can block the wider part of one slide to achieve positioning of the slide, and can also allow the narrower part of the slide to pass through so as not to affect the sliding of the other slide.

[0020] The heating coil of the present invention can be raised and lowered and can be moved forward and backward. Before heating begins, the lifting mechanism and the first translation mechanism cooperate to place the heating coil on the outside of the rotor. After heating ends, the heating coil is moved away from the rotor by reversing the operation, so that the slide can smoothly transfer the rotor from the heating station to the pressing station, avoiding interference of the heating coil with the rotor translation process.

[0021] This invention is applicable to the assembly of large-size cast aluminum rotors with an outer diameter of 180mm to 325mm and a weight of 50kg to 120kg. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] Figure 1 One of the structural schematic diagrams of this invention; Figure 2 : The second schematic diagram of the structure of the present invention, wherein the head and the chassis are in partial cross-sectional view; Figure 3 : A schematic diagram of the structure of the slide and the second translation mechanism of the present invention, wherein the slide is in partial cross-sectional view; Figure 4 : The present invention Figure 3 The enlarged view of part A in the present invention; Figure 5 : The present invention Figure 3 The enlarged view of part B in the present invention; Where: 1 - frame, 11 - base, 12 - head, 2 - workbench, 21 - support beam, 22 - first stop iron, 23 - second stop iron, 3 - chassis, 31 - lifting table, 4 - heating coil, 41 - coil support, 5 - sliding table, 50 - support sleeve, 51 - limit block, 52 - cavity, 53 - first cylindrical bearing, 54 - floating shaft, 55 - slot hole, 56 - compression spring, 57 - connecting angle iron, 58 - vertical chute, 59 - blind hole, 6 - lifting mechanism, 61 - lifting cylinder, 62 - guiding shaft, 7 - first translation mechanism, 71 - first translation cylinder, 72 - first cylinder slider, 73 - guide rail, 8 - second translation mechanism, 81 - second translation cylinder, 82 - second cylinder slider, 83 - second cylindrical bearing, 9 - pressing mechanism, 91 - servo electric cylinder, 92 - lower pressing sleeve. Detailed implementation manners

[0024] In order to better understand the present invention, the content of the present invention will be further clearly described below in conjunction with embodiments and drawings. However, the protection scope of the present invention is not limited to the following embodiments only. In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0025] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by terms such as "left and right", "up and down", "front and back", "top and bottom", etc. is based on Figure 1 the orientation or positional relationship shown, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific manner.

[0026] Refer to Figures 1-5 , the purpose of this embodiment is to provide a motor rotor assembly device with double - station heating. The device is provided with a "U - shaped" frame 1. The lower part of the frame 1 is a base 11, and the upper part is a head 12. The head 12 is located above the base 11.

[0027] A worktable 2 is fixedly mounted on the base 11, extending equidistantly to the left and right. Two support beams 21 are arranged side-by-side along the length (left-right direction) of the worktable 2, and two slides 5 are slidably mounted on the support beams 21. Each slide 5 spans across the two support beams 21. Each slide 5 is square, with a square limiting block 51 at its bottom, positioned between the two support beams 21. The portions of the slide 5 on either side of the limiting block 51 rest on the support beams 21. The front-to-back width of the limiting block 51 matches the distance between the support beams 21, and the front and back sides of the limiting block 51 slide in contact with the inner sides of the two support beams 21, preventing the slide 5 from shifting forward or backward as it slides along the support beams 21.

[0028] The slide table 5 is equipped with a support sleeve 50 for mounting the rotor of the motor to be heated. The two ends of the worktable 2 are two heating stations for the rotor, and the middle part is the pressing station for the rotor (below the machine head 12). The slide table 5 is used to move the rotor from the heating station to the pressing station, and finally the pressing mechanism 9 on the machine head 12 presses the motor shaft into the rotor.

[0029] The sliding of the slide table 5 is driven by the second translation mechanism 8. Each support beam 21 has a first stop 22 at both ends for positioning the slide table 5 in the heating position, and a second stop 23 near the center for positioning the slide table 5 in the pressing position. When the slide table 5 abuts against the first stop 22, the slide table 5 is in the heating position, and the second translation mechanism 8 continuously provides a pushing force towards the first stop 22, fixing the slide table 5 in the heating position. When the slide table 5 abuts against the second stop 23, the slide table 5 is in the pressing position, and the second translation mechanism 8 continuously provides a pushing force towards the second stop 23, fixing the slide table 5 in the pressing position.

[0030] The slides 5 have different widths on both sides of the limiting block 51. The wider portion of one slide 5 rests on one of the support beams 21, and the wider portion of the other slide 5 rests on the other support beam 21. The second stop 23 is positioned between the planes containing the same side edges of the two slides 5 (positioned between the distances between the corresponding side edges of the two slides 5 in the front-back direction). Therefore, a single second stop 23 on each support beam 21 can block the wider portion of one slide 5 while allowing the other slide 5 to pass through, ensuring that the second stop 23 can position the corresponding slide 5 to the pressing position.

[0031] The rotor is heated by an induction heating host and a heating coil 4. During heating, the rotor is placed on a slide table 5 in the heating station, and the heating coil 4 is sleeved on the outside of the rotor. To avoid the heating coil 4 affecting the translation of the rotor, the heating coil 4 is also raised and lowered under the drive of the lifting mechanism 6, and translated back and forth under the drive of the first translation mechanism 7.

[0032] Specifically, a housing 3 is installed on both sides of the frame 1, and the housing 3 is located behind the workbench 2. A plate-shaped lifting platform 31 is installed on the upper side of each housing 3, and a lifting mechanism 6 is used to drive the lifting platform 31 to rise and fall. In the embodiment provided in the attached drawings, the lifting mechanism 6 includes a lifting cylinder 61 and a guide shaft 62. The piston rod of the lifting cylinder 61 is vertically upward, passes through the table surface of the housing 3, and is fixedly connected to the center of the lifting platform 31. Multiple guide shafts 62 (four guide shafts as shown in the attached drawings) are vertically arranged, and the top end of each guide shaft 62 is fixedly connected to the lifting platform 31. A sliding sleeve or linear bearing fixedly connected to the table surface of the housing 3 is fitted onto the guide shaft 62 to provide vertical guidance for the lifting of the lifting platform 31.

[0033] The first translation mechanism 7 is mounted on the lifting platform 31 and is used to drive the heating coil 4 to translate back and forth. In the embodiment provided in the accompanying drawings, the first translation mechanism 7 includes a first translation cylinder 71 and a guide rail 73. The guide rail 73 is arranged along the front-back direction, and the coil support 41 of the heating coil 4 is slidably connected to the guide rail 73 via a slider. The first translation cylinder 71 is parallel to the guide rail 73 and is used to drive the coil support 41 to slide along the guide rail 73. In order to reduce the axial length of the first translation cylinder 71 while meeting the stroke requirements, the first translation cylinder 71 is a magnetically coupled rodless cylinder, and the slider on the first translation cylinder 71 is a first cylinder slider 72, which is fixedly connected to the coil support 41.

[0034] When the rotor starts heating at the heating station, the lifting mechanism 6 raises the heating coil 4, and the first translation mechanism 7 moves the heating coil 4 towards the rotor (forward). When the first translation cylinder 71 reaches the end of its stroke, the lifting mechanism 6 lowers and places the heating coil 4 on the outside of the rotor. After heating is complete, the lifting mechanism 6 and the first translation mechanism 7 reverse their operation to return the heating coil 4 to its original position. The lifting mechanism 6 and the first translation mechanism 7 can be implemented using other conventional or known methods (such as motor screw drive, gear and rack).

[0035] The pressing mechanism 9 includes a servo electric cylinder 91 housed within the machine head 12, with a telescopic rod extending vertically downwards. A lower pressing sleeve 92 is located at the lower end of the telescopic rod, engaging with the motor shaft. The servo electric cylinder 91 then presses the motor shaft into the heated rotor. The pressing mechanism 9 can be implemented using other conventional or known methods (such as hydraulic or mechanical drive).

[0036] The pressing mechanism 9 applies enormous downward pressure (1-5 tons), therefore the support beam 21 needs to provide large-area support for the slide table 5, but the large-area contact between the slide table 5 and the support beam 21 results in excessive friction. To address this issue, a first cylindrical bearing 53 with floating support is installed at the bottom of the slide table 5 (outside the limiting block 51).

[0037] Specifically, slots 55 are horizontally provided at both ends of the slide table 5, and the slots 55 are perpendicular to the sliding direction of the slide table 5. The cross-section of the slot 55 is oval, with two semicircles distributed vertically. A floating shaft 54 ​​is provided inside the slot 55. The diameter of the floating shaft 54 ​​is slightly smaller than the width of the slot 55, so the floating shaft 54 ​​can move up and down within the slot 55. The diameter of the floating shaft 54 ​​is the same as the inner diameter of the first cylindrical bearing 53, and the first cylindrical bearing 53 is provided at both ends of each floating shaft 54. The slide table 5 is provided with a cavity 52 for accommodating the first cylindrical bearing 53, and the cavity 52 is connected to the bottom of the slide table 5. Multiple vertical blind holes 59 are also provided along the slots 55. The lower end of the blind hole 59 is open (connected to the bottom of the slide table 5), and the upper end extends above the slot 55. Each blind hole 59 is equipped with a compression spring 56, which is compressed above the floating shaft 54, thus providing a downward elastic force to support the floating shaft 54 ​​at the bottom of the slot 55. The distance between the slot 55 and the bottom surface of the slide table 5 is less than the radial section height of the first cylindrical bearing 53. Therefore, when the floating shaft 54 ​​is at the bottom of the slot 55, the first cylindrical bearing 53 will protrude from the bottom of the slide table 5. At the same time, the height of the first cylindrical bearing 53 protruding from the slide table 5 is less than the stroke of the floating shaft 54 ​​as it floats up and down within the slot 55. When the floating shaft 54 ​​moves upward, the first cylindrical bearing 53 will retract completely within the slide table 5.

[0038] The compression spring 56 installed in the slide table 5 can overcome the weight of the slide table 5 itself and other components on the slide table 5, and eject the first cylindrical bearing 53 from the slide table 5, thereby separating the slide table 5 from the support beam 21. The slide table 5 is slidably connected to the support beam 21 through the first cylindrical bearing 53, thus effectively reducing the resistance when the slide table 5 slides. When the pressing mechanism 9 presses the motor shaft downward, the downward pressure will overcome the elastic force of the compression spring 56, causing the first cylindrical bearing 53 to retract into the slide table 5, so that the slide table 5 is in complete contact with the support beam 21, thereby providing a firm support for the slide table 5.

[0039] In this case, the second translation mechanism 8 does not require a huge driving force to drive the slide table 5 to move. Therefore, the second translation mechanism 8 includes a second translation cylinder 81, which is a magnetically coupled rodless cylinder and is arranged between the two support beams 21 along the sliding direction of the slide table 5.

[0040] The slider mounted on the second translation cylinder 81 is the second cylinder slider 82, which is also floatingly connected to the slide table 5 to avoid interfering with the vertical movement of the slide table 5. Specifically, a connecting angle iron 57 is fixedly mounted on the bottom of the slide table 5. The horizontal part of the connecting angle iron 57 is fixedly connected to the slide table 5, and the vertical part of the connecting angle iron 57 is close to the second cylinder slider 82. The vertical part of the connecting angle iron 57 is provided with a vertical groove 58, and multiple second cylindrical bearings 83 are provided on the second cylinder slider 82. The second cylindrical bearings 83 are placed in the vertical groove 58, and the outer diameter of the second cylindrical bearings 83 is slightly smaller than the groove width of the vertical groove 58. When the second translation cylinder 81 drives the second cylinder slider 82 to move horizontally, the slide table 5 can be moved by the second cylindrical bearings 83 and the connecting angle iron 57. When the slide table 5 moves up and down, the second cylindrical bearings 83 roll in the vertical groove 58, which reduces the friction between the two and does not interfere with the vertical movement of the slide table 5.

[0041] The motor rotor assembly device is also equipped with a control mechanism, which controls the induction heating host, lifting mechanism 6, first translation mechanism 7, second translation mechanism 8, and pressing mechanism 9. Each heating station on the workbench 2 has a button for controlling the heating and translation slide 5, and each pressing station has a button for controlling the pressing mechanism 9; all these buttons are electrically connected to the control mechanism. A pressure sensor electrically connected to the control mechanism is also installed inside the lower pressing sleeve 92. For example, after receiving a "slide return" signal triggered by a button, the control mechanism activates the corresponding second translation mechanism 8 to move and fix the corresponding slide 5 at the heating station. After receiving a "start heating" signal triggered by a button, the lifting mechanism 6 and the first translation mechanism 7 work together to place the heating coil 4 on the outside of the rotor, start the induction heating host for heating, and issue a reminder message and begin heat preservation after the preset heating time is reached. When the control mechanism receives the "rotor transfer" signal triggered by the button, the induction heating host stops heating. The lifting mechanism 6 and the first translation mechanism 7 work together to return the heating coil 4 to its original position. The second translation mechanism 8 is then activated to move the slide table 5 and fix it to the pressing station. When the control mechanism receives the "start pressing" signal triggered by the button, the servo electric cylinder 91 starts working according to the preset process parameters, pressing the motor shaft, which has been placed above the rotor, into the rotor and holding the pressure for a preset time. After the pressure holding is completed, the servo electric cylinder 91 automatically rises and issues a reminder message.

[0042] This invention allows for the replacement of the corresponding heating coil 4, support sleeve 50, and process parameters (such as heating time, pressing curve, and holding time to match the ambient temperature) depending on the different assembled rotors. From a production perspective, the applicable rotors have an outer diameter ranging from 180mm to 325mm and a weight range from 50kg to 120kg, covering various series of cast aluminum rotors such as YBX5, YBX4, YBX3, WEX3, and YBBP.

[0043] This invention employs a servo electric cylinder as the power source for the pressing mechanism. Combined with corresponding process parameters, it achieves precise control of the motor shaft pressing stroke and holding time, ensuring consistency and reliability in each pressing operation. Simultaneously, a pressure sensor is installed within the lower pressing sleeve to monitor pressure changes in real time during the pressing process. This allows the control mechanism to precisely adjust the pressing process based on pressure feedback, effectively preventing damage to the rotor due to excessive pressure or insecure assembly due to insufficient pressure. Especially for large-sized rotors (outer diameter exceeding 300mm, weight exceeding 100kg) to which this device is applicable, a pressing force of 1-5 tons is required during the pressing process. Furthermore, the pressing process parameters required for different rotor sizes vary significantly. The combined use of the servo electric cylinder and pressure sensor provides a reliable guarantee for the precise pressing of rotors with a wide range of sizes.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A dual-station heating motor rotor assembly device, characterized in that, It includes a frame, a workbench, and a chassis; the frame includes a base and a head located above the base, the workbench is fixedly mounted on the base, and the two chassis are located on both sides of the frame; The two ends of the workbench are heating stations, and the middle is a pressing station; each heating station is equipped with a sliding table, and the workbench is equipped with a second translation mechanism for driving the sliding table to slide between the heating station and the pressing station; each sliding table is equipped with a support sleeve for mounting the motor rotor. Each of the chassis is equipped with a heating coil for heating the motor rotor; The machine head is provided with a pressing mechanism for pressing the motor shaft into the motor rotor, and the pressing mechanism is located directly above the pressing station; The slide table is equipped with four first cylindrical bearings inside. The axes of the first cylindrical bearings are horizontal and perpendicular to the sliding direction of the slide table. The first cylindrical bearings protrude from the bottom surface of the slide table under the action of compression springs.

2. The dual-station heating motor rotor assembly device according to claim 1, characterized in that, The workbench is provided with two supporting beams arranged side by side along its length. The slide is square, and a square limiting block is provided at the bottom. The width of the limiting block matches the distance between the two supporting beams. Each slide spans two support beams and is slidably connected to the support beams, and the limiting block is disposed between the support beams.

3. The dual-station heating motor rotor assembly device according to claim 2, characterized in that, Each of the support beams has a first stop at both ends for positioning the slide table to the heating station, and a second stop in the middle for positioning the slide table to the pressing station.

4. The dual-station heating motor rotor assembly device according to claim 3, characterized in that, Each of the slides has a different width on both sides of the limiting block, and the second stop is disposed within the gap between the same side edges of the two slides.

5. The dual-station heating motor rotor assembly device according to claim 2, characterized in that, The slide has horizontal slots through both ends, the slots are perpendicular to the sliding direction of the slide, and the cross-section is a vertical oval. Each slot is equipped with a floating shaft, the diameter of which is slightly smaller than the width of the slot, and each of the floating shafts is equipped with the first cylindrical bearing at both ends. A plurality of vertical blind holes for inserting the compression spring are provided along the slot, the lower end of the blind hole being open and the upper end extending above the slot; the compression spring is compressed above the floating shaft; The first cylindrical bearing is located in a slot cavity that communicates with the bottom of the slide, and the distance between the slot and the bottom surface of the slide is less than the radial cross-sectional height of the first cylindrical bearing; Before the pressing mechanism is in operation, the compression spring supports the floating shaft on the lower wall of the slot; when the pressing mechanism is in operation, the first cylindrical bearing retracts into the slide under pressure.

6. The dual-station heating motor rotor assembly device according to claim 5, characterized in that, The second translation mechanism includes a second translation cylinder, which is a magnetically coupled rodless cylinder, and the slider on the cylinder body is the second cylinder slider; The bottom of the slide is provided with a connecting angle iron, the horizontal part of which is fixedly connected to the slide, and the vertical part is close to the second cylinder slider; the vertical part is provided with a vertical groove. The second cylinder slider is provided with a plurality of second cylindrical bearings, all of which are located in the vertical slide groove, and the outer diameter of the second cylindrical bearing is slightly smaller than the width of the vertical slide groove.

7. The dual-station heating motor rotor assembly device according to claim 1, characterized in that, The pressing mechanism includes a servo electric cylinder disposed inside the machine head, and the telescopic rod of the servo electric cylinder extends vertically downward out of the machine head; the lower end of the telescopic rod is provided with a lower pressing sleeve for cooperating with the motor shaft.

8. The dual-station heating motor rotor assembly device according to claim 7, characterized in that, A pressure sensor is installed inside the lower pressure sleeve.

9. The dual-station heating motor rotor assembly device according to claim 1, characterized in that, Each of the chassis is equipped with a plate-shaped lifting platform on its upper side, and a lifting mechanism for driving the lifting platform is installed inside the chassis. The lifting mechanism includes a lifting cylinder and multiple guide shafts; The piston rod of the lifting cylinder is vertically upward and is fixedly connected to the center of the lifting platform after passing through the platform of the machine box; All guide shafts are vertically arranged, and their top ends are fixedly connected to the lifting platform; each guide shaft is fitted with a sliding sleeve that is fixedly connected to the chassis platform.

10. The dual-station heating motor rotor assembly device according to claim 9, characterized in that, The lifting platform is provided with a first translation mechanism for driving the heating coil to translate. The first translation mechanism includes a first translation cylinder and a guide rail. The coil support of the heating coil is slidably connected to the guide rail via a slider; The first translation cylinder is arranged parallel to the guide rail; The first translation cylinder is a magnetically coupled rodless cylinder, and the slider on the cylinder body is the first cylinder slider; the first cylinder slider is fixedly connected to the coil bracket.

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