New energy electric drive assembly line stator and rotor assembly machine

Abstract

This utility model relates to the field of assembly machine technology and discloses a stator and rotor assembly machine for a new energy electric drive assembly line, including a machine base, a frame, a servo pressing mechanism, an upper ejector mechanism, a stator housing loading slide, a rotor end cover assembly loading slide, a lower ejector mechanism, and a spline alignment mechanism. Through the coordinated work of these mechanisms, automated operation of the stator and rotor assembly is achieved, reducing manual intervention, lowering labor intensity, and improving production efficiency. The dedicated spline alignment mechanism accurately adjusts the alignment of the stator splines and rotor splines, ensuring accurate spline alignment and preventing damage to components caused by misalignment.

Description

Technical Field

[0001] This utility model relates to the field of assembly machine technology, specifically to a stator and rotor assembly machine for a new energy electric drive assembly line. Background Technology

[0002] In the production and assembly process of electric drive systems for new energy vehicles, the assembly of the stator and rotor is a critical step that directly affects the performance and quality of the electric drive system. Stator-rotor assembly requires accurately pressing the rotor into the stator, with the alignment of the rotor splines with the stator splines being a particularly challenging aspect. Inaccurate alignment can not only lead to assembly difficulties but may also damage the spline structure, affecting product lifespan.

[0003] Currently, some production lines still use manual assisted assembly or semi-automated equipment for operation, which has the following problems: high degree of human involvement, high labor intensity, and low production efficiency; assembly accuracy is difficult to guarantee, especially spline alignment which relies on human experience and is prone to deviation. Utility Model Content

[0004] This utility model mainly provides a stator and rotor assembly machine for new energy electric drive assembly lines, which solves the problems of high manual involvement, high labor intensity, low production efficiency, and difficulty in ensuring assembly accuracy, especially the spline alignment which relies on manual experience and is prone to deviation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A stator and rotor assembly machine for a new energy electric drive assembly line includes a machine base, a frame mounted on the machine base, a servo pressing mechanism mounted on the upper end of the frame, an upper ejector mechanism mounted on the lower end of the servo pressing mechanism, a stator housing loading slide mounted on the machine base, a rotor end cover assembly loading slide mounted on the machine base corresponding to one side of the stator housing loading slide, a lower ejector mechanism mounted on the machine base corresponding to the position below the upper ejector mechanism, and a spline alignment mechanism mounted on the machine base for spline alignment.

[0006] Furthermore, the servo pressing mechanism includes a lifting frame; the upper ejector mechanism includes a tensioning cylinder and an upper ejector pin mounted on the lifting frame. A tensioning plate is provided at the lower end of the tensioning cylinder. Multiple floating positioning spindles are mounted on the tensioning plate. Each floating positioning spindle is equipped with a pair of reverse-mounted plane bearings. A floating plate is mounted on each reverse-mounted plane bearing. A tooling plate is detachably connected to the lower side of the floating plate. An end cap clamping rod and an end cap positioning pin are provided on the tooling plate. An upper expansion hole is provided on the tensioning plate, the floating plate, and the tooling plate to accommodate the upper ejector pin. A floating positioning component for fixing the position of the floating plate is provided on the tensioning plate. Specifically, multiple upper guide sleeves are provided on the lifting frame. An upper guide rod is slidably connected within each upper guide sleeve, and the lower end of the upper guide rod is fixedly connected to the tensioning plate. Specifically, the floating positioning assembly includes a floating positioning cylinder disposed on the tensioning plate, the output end of the floating positioning cylinder being provided with a floating positioning pin, and a floating positioning hole cooperating with the floating positioning pin being provided on the floating plate. Specifically, a pressing cylinder is disposed on the pressing plate, the output end of the pressing cylinder being provided with a lower self-locking wedge, and an upper self-locking wedge cooperating with the lower self-locking wedge is disposed on the lifting frame.

[0007] Furthermore, the servo pressing mechanism includes a lifting frame, a lifting slide rail vertically mounted on the lifting frame, and a servo pressing cylinder mounted on the frame; the output end of the servo pressing cylinder is mounted on the lifting frame, and the sliding seat of the lifting slide rail is fixedly connected to the frame. Specifically, a balancing cylinder is mounted on the frame, and the lower end of the balancing cylinder is fixedly connected to the upper surface of the lifting frame.

[0008] Furthermore, the stator housing loading slide includes a stator linear displacement module mounted on the machine base and a displacement plate mounted on the stator linear displacement module. The displacement plate is provided with multiple sets of upper and lower floating components. A tray is provided at the upper end of each upper and lower floating component, and a limiting plate is provided at the lower end of each upper and lower floating component. A spring sleeve is provided on the limiting plate, and a floating support rod is slidably connected inside the spring sleeve. A support rod floating spring is provided between the floating support rod and the spring sleeve. A bearing-fitting rotating sleeve is rotatably connected to the upper end of the floating support rod. A fine guide hole for the lower ejector pin to pass through is provided on the floating support rod, and a lower expansion hole for the lower ejector pin to pass through is provided on the bearing-fitting rotating sleeve. A fixing seat for limiting the limiting plate is provided on the machine base, and a convex top ring for limiting the floating support rod is provided on the fixing seat. Both the displacement plate and the tray are provided with an outer expansion hole for the bearing-fitting rotating sleeve to pass through.

[0009] Furthermore, the upper and lower floating assembly includes a lower guide sleeve disposed on the displacement plate, an upper and lower floating guide rod slidably connected inside the lower guide sleeve, and a housing floating spring disposed between the lower guide sleeve and the tray; the tray is disposed at the upper end of the upper and lower floating guide rods, and the limiting plate is disposed at the lower end of the upper and lower floating guide rods.

[0010] Furthermore, the rotor end cover assembly loading slide includes a loading rack, on which a rotor linear displacement module, a rotor vertical displacement module mounted on the rotor linear displacement module, and a rotor frame mounted on the rotor vertical displacement module are provided. A rotor positioning block is provided on the rotor frame. Both the rotor frame and the rotor positioning block are provided with a material removal notch.

[0011] Furthermore, the lower ejector mechanism includes an ejector frame disposed on the lower side of the machine base, an ejector displacement slide rail disposed on the ejector frame, an ejector mounting slide plate slidably connected to the ejector displacement slide rail, an ejector displacement rodless cylinder disposed on the ejector frame for driving the ejector mounting slide plate to move up and down, and a lower ejector pin disposed on the ejector mounting slide plate; a coarse guide sleeve disposed on the machine base for coarsely guiding the lower ejector pin.

[0012] Furthermore, the spline alignment mechanism includes an alignment frame disposed on the lower side of the machine tool, an alignment displacement slide rail disposed on the alignment displacement slide rail, an alignment slide plate disposed on the alignment frame, an alignment displacement rodless cylinder disposed on the alignment frame for driving the alignment slide plate to move up and down, an alignment servo motor disposed on the alignment slide plate, an alignment floating sleeve disposed at the output end of the alignment servo motor, a drive shaft axially slidably connected inside the alignment floating sleeve, an alignment floating spring disposed between the lower end of the drive shaft and the alignment floating sleeve, and a rotary plug-in disposed at the upper end of the drive shaft.

[0013] Furthermore, a circumferential limiting pin is provided on the drive shaft, and an axial displacement limiting sliding hole for the pin is provided on the alignment floating sleeve to cooperate with the axial displacement of the circumferential limiting pin.

[0014] Beneficial effects: Through the coordinated work of various mechanisms, the assembly of the stator and rotor is automated, reducing manual intervention, lowering labor intensity, and improving production efficiency; a dedicated spline alignment mechanism accurately adjusts the alignment of the stator and rotor splines, ensuring accurate spline alignment and preventing damage to components caused by misalignment; the use of reverse-mounted plane bearings, floating positioning mandrels, and bearing-coordinated rotating sleeves allows for floating adjustment of components during assembly, preventing scratches and damage to components caused by hard contact; and detachable tooling plates and other structures facilitate adjustments for different product models, improving the equipment's versatility. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the stator and rotor assembly machine of a new energy electric drive assembly line according to an embodiment; Figure 2 This is a schematic diagram of a machine tool with its outer casing removed, according to one embodiment. Figure 3 This is a slanted view of the upper ejector mechanism according to one embodiment; Figure 4 This is a cross-sectional schematic diagram of an embodiment of the upper ejector pin mechanism; Figure 5 This is a schematic diagram of a floating positioning mandrel according to one embodiment; Figure 6 This is a schematic diagram of a stator housing loading slide according to an embodiment; Figure 7 This is a schematic diagram of the loading slide of the rotor end cover assembly according to one embodiment; Figure 8 This is a slanted view of the lower ejector pin mechanism according to one embodiment; Figure 9 This is a cross-sectional schematic diagram of the lower ejector mechanism according to one embodiment; Figure 10 This is a schematic diagram of an oblique view of a spline mechanism according to one embodiment; Figure 11 is a cross-sectional schematic diagram of a spring sleeve according to an embodiment.

[0016] Reference numerals: 1. Machine base; 2. Servo pressing mechanism; 3. Lifting frame; 301. Lifting slide rail; 302. Servo pressing cylinder; 303. Balancing cylinder; 304. Upper ejector pin mechanism; 4. Tensioning cylinder; 401. Upper ejector pin; 402. Tensioning plate; 403. Floating positioning spindle; 404. Reverse mounting plane bearing; 405. Floating plate; 406. Tooling plate; 407. End cover clamping rod; 408. End cover positioning pin; 409. Floating positioning assembly; 410. Upper guide; 411. Upper guide rod; 412. Pressing cylinder; 413. Lower self-locking inclined block; 414. Upper self-locking inclined block; 415. Stator housing loading slide; 5. Stator linear displacement module; 501. Displacement plate; 502. Upper and lower floating assembly; 503. Tray; 504. Limiting plate; 505. Spring sleeve; 506. Floating support rod; 507. Support rod. Floating spring 508, bearing mating rotating sleeve 509, precision guide hole 510, fixed seat 511, convex top ring 512, rotor end cover assembly loading slide 6, loading rack 601, rotor linear displacement module 602, rotor vertical displacement module 603, rotor frame 604, rotor positioning block 605, unloading notch 606, lower ejector pin mechanism 7, ejector pin frame 701, ejector pin displacement slide rail 702, ejector pin mounting slide plate 703, ejector pin displacement rodless cylinder 704, lower ejector pin 705, coarse guide sleeve 706, spline alignment mechanism 8, alignment frame 801, alignment displacement slide rail 802, alignment slide plate 803, alignment displacement rodless cylinder 804, alignment servo motor 805, alignment floating sleeve 806, drive shaft 807, rotary plug-in 808, circumferential limit pin 809. Detailed Implementation

[0017] The following will provide a more detailed description of the technical solution for the stator and rotor assembly machine of the new energy electric drive assembly line involved in this utility model, with reference to the embodiments.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] As shown in Figures 1 to 11, the stator and rotor assembly machine of the new energy electric drive assembly line in this embodiment includes a machine base 1, a frame 2 mounted on the machine base 1, a servo pressing mechanism 3 mounted on the upper end of the frame 2, an upper ejector mechanism 4 mounted on the lower end of the servo pressing mechanism 3, a stator housing loading slide 5 mounted on the machine base 1, a rotor end cover assembly loading slide 6 mounted on the machine base 1 on one side corresponding to the stator housing loading slide 5, a lower ejector mechanism 7 mounted on the machine base 1 at a position below the upper ejector mechanism 4, and a spline alignment mechanism 8 mounted on the machine base 1 for spline alignment. In use, the loading and unloading of corresponding workpieces is achieved by external manual labor or a multi-axis robot. The stator housing loading slide 5 moves the stator housing, fixed to it, to a preset assembly position. The rotor end cover assembly loading slide 6 moves the rotor end cover assembly, fixed to it, to the assembly position. The upper ejector mechanism 4 and lower ejector mechanism 7 activate and initially hold the upper and lower ends of the rotor shaft of the product. Then, the servo pressing mechanism 3 drives the upper ejector mechanism 4, in conjunction with the rotor end cover assembly loading slide 6, to continue lowering the rotor end cover assembly, allowing the rotor shaft to enter the shaft cavity of the stator housing and perform initial positioning of the stator housing and rotor end cover assembly. Subsequently, the rotor end cover assembly moves downward a certain distance, disengaging from the positioning components and resetting. The upper ejector mechanism 4 and lower ejector mechanism 7 then drive the rotor shaft of the product to continue entering. When the rotor spline and stator spline reach a preset limit distance, the spline alignment mechanism 8 is activated. The protruding shaft extends and connects to the stator housing, and the stator spline is adjusted by rotating the protruding shaft through the spline mechanism 8, thereby aligning the stator spline with the rotor spline. At this time, the end cover is in the pre-installed state. The servo pressing mechanism 3 is started to drive the components to descend, and the ejector pin mechanism 4 is used to drive the end cover to be assembled on the stator housing. After the end cover is assembled, the servo pressing mechanism 3 is started again to descend, thereby pressing the rotor spline down to the stator spline, so that the two are located in the spline sleeve of the product, thereby pressing the rotor in the rotor end cover assembly into the stator and completing the assembly.

[0020] In one embodiment, as shown in Figures 1, 2, 3, 4, and 5, the servo pressing mechanism 3 includes a lifting frame 301; the upper ejector mechanism 4 includes a tensioning cylinder 401 and an upper ejector 402 mounted on the lifting frame 301. A tensioning plate 403 is provided at the lower end of the tensioning cylinder 401. Multiple floating positioning spindles 404 are mounted on the tensioning plate 403. Each floating positioning spindle 404 is provided with a pair of reverse-mounted plane bearings 405. A floating plate 406 is mounted on each reverse-mounted plane bearing 405. A tooling plate 407 is detachably connected to the lower side of the floating plate 406. An end cap clamping rod 408 and an end cap positioning pin 409 are provided on the tooling plate 407. An upwardly enlarged hole is provided on the tensioning plate 403, the floating plate 406, and the tooling plate 407 to accommodate the upper ejector 402. The tensioning plate 403... A floating positioning assembly 410 for fixing the position of the floating plate 406 is provided on the lifting frame 301. Specifically, multiple upper guides 411 are provided on the lifting frame 301, and an upper guide rod 412 is slidably connected in each upper guide 411. The lower end of the upper guide rod 412 is fixedly connected to the tension plate 403. Specifically, the floating positioning assembly 410 includes a floating positioning cylinder provided on the tension plate 403. A floating positioning pin is provided at the output end of the floating positioning cylinder, and a floating positioning hole is provided on the floating plate 406 to cooperate with the floating positioning pin. Specifically, a clamping cylinder 413 is provided on the tension plate 403, and a lower self-locking wedge 414 is provided at the output end of the clamping cylinder 413. An upper self-locking wedge 415 is provided on the lifting frame 301 to cooperate with the lower self-locking wedge 414. In the rotor end cover assembly, the positions of the rotor and end cover are not fixed from the beginning. Therefore, a clamping rod is needed to straighten the end cover, and a floating positioning component 410 is needed to allow the end cover to move within a certain range during assembly. The reverse-mounted planar bearing 405 refers to a planar bearing with an inner ring in a reversed position. Its balls are limited by the outer ring, and the outer rear balls are not in the groove of the inner ring, so the inner ring can move. That is, in the radial direction, due to the gap between the inner ring and the floating positioning mandrel 404, the floating plate 406 can float freely within a certain range in the planar direction, such as 2mm, 3mm, etc. The specific floating range is determined by the selected gap between the inner ring and the floating positioning mandrel 404.In use, firstly, the tensioning cylinder 401 is in the extended state, and the floating positioning assembly 410 is in the fixed state of the floating plate 406; the servo pressing mechanism 3 drives the lifting frame 301 to descend, so that the upper ejector pin 402 presses against the upper end of the rotor shaft in the rotor end cover assembly, and the end cover pressing rod 408 presses against the upper end of the end cover in the end cover assembly, thereby straightening the end cover and making the end cover horizontal; then the pressing cylinder 413 is activated, driving the lower self-locking wedge 414 to move and press against the upper self-locking wedge 415, completing the self-locking of the pressing rod with the upper end of the rotor end cover; then the rotor shaft is inserted into the shaft cavity in the stator housing, thus waiting for the next step of adjusting the stator spline by the spline mechanism 8; at this time, the end cover is in the pre-installed state, and the floating positioning cylinder is activated to disengage the floating positioning pin from the floating positioning hole on the floating plate 406, so that the floating plate 406 can be installed in reverse of the plane bearing 405. With the cooperation of the servo pressing mechanism 3, the end cover floats in a horizontal position, so that when the servo pressing mechanism 3 drives the end cover into the mounting pin on the stator housing, the position can be adjusted by floating, avoiding misalignment of the end cover and the stator housing. After the end cover is assembled on the stator housing, when the rotor pressing needs to continue, the pressing cylinder 413 returns to the unlocked state, and the tensioning cylinder 401 drives the tensioning plate 403 to rise, so that the upper end of the pressing rod moves away from the end cover, and the servo pressing mechanism 3 can also drive the upper pin 402 set on the lifting frame 301 to continue to descend, pressing the rotor completely into the stator to complete the assembly.With this structure, the lifting frame 301 of the servo pressing mechanism 3 provides stable support for the upper ejector mechanism 4. In the upper ejector mechanism 4, the reverse-mounted plane bearing 405 cooperates with the floating positioning spindle 404, allowing the floating plate 406 to float freely within a certain range in the horizontal direction. Combined with the end cover clamping rod 408 and the end cover positioning pin 409, this ensures accurate positioning of the end cover during assembly and avoids hard collisions between the end cover and the stator housing through floating adjustment during assembly, effectively protecting the components. The detachable tooling plate 407 facilitates the replacement of suitable positioning components according to different product models, improving the equipment's versatility and flexibility. The floating positioning assembly 410 can fix the position of the floating plate 406 when needed, ensuring positioning stability during critical stages of assembly. The cooperation between the upper guide 411 and the upper guide rod 412 provides accurate guidance for the lifting movement of the tension plate 403, ensuring smooth movement and improving the performance of the upper ejector mechanism 4. The positioning accuracy and pressing stability are improved; the floating positioning cylinder, through the cooperation of the floating positioning pin and the floating positioning hole, realizes the rapid fixing and release of the floating plate 406, which is convenient to control and reliable in positioning; the pressing cylinder 413 drives the lower self-locking inclined block 414 and the upper self-locking inclined block 415 to form a self-locking mechanism, which can maintain a stable pressing force during the pressing of the end cover, prevent loosening, ensure the stability of the end cover's posture during assembly, and avoid assembly deviation caused by insufficient pressing force.

[0021] In one embodiment, as shown in Figures 1 and 2, the servo pressing mechanism 3 includes a lifting frame 301, a lifting slide rail 302 vertically disposed on the lifting frame 301, and a servo pressing cylinder 303 disposed on the frame 2. The output end of the servo pressing cylinder 303 is disposed on the lifting frame 301, and the sliding seat of the lifting slide rail 302 is fixedly connected to the frame 2. Specifically, a balancing cylinder 304 is disposed on the frame 2, and the lower end of the balancing cylinder 304 is fixedly connected to the upper surface of the lifting frame 301. In use, the servo pressing cylinder 303, in conjunction with the lifting slide rail 302, can move the lifting frame 301 up and down on the frame 2 to complete multiple steps of assembly work; at the same time, the balancing cylinder 304 can balance the weight and motion inertia of the lifting frame 301, making the movement of the lifting frame 301 more stable and ensuring the relative positional accuracy between the components. With this structure, the servo pressure cylinder 303 provides power for the lifting of the lifting frame 301. It has high pressure and displacement control accuracy and can adjust the pressing force at different stages during the assembly of the stator and rotor to meet the assembly process requirements. The cooperation between the lifting slide rail 302 and the sliding seat provides guidance for the movement of the lifting frame 301, ensuring that the lifting frame 301 moves smoothly in the vertical direction and avoids deviation. The balancing cylinder 304 can balance the weight of the lifting frame 301 and related components, reduce the load on the servo pressure cylinder 303, reduce energy consumption, and at the same time make the movement of the lifting frame 301 more stable, reduce the impact of motion inertia on the assembly accuracy, and extend the service life of the equipment.

[0022] In one embodiment, as shown in Figures 6 and 11, the stator housing loading slide 5 includes a stator linear displacement module 501 mounted on the machine base 1 and a displacement plate 502 mounted on the stator linear displacement module 501. The displacement plate 502 has multiple sets of vertical floating components 503. A tray 504 is mounted on the upper end of each vertical floating component 503, and a limiting plate 505 is mounted on the lower end of each vertical floating component 503. A spring sleeve 506 is mounted on the limiting plate 505, and a floating support rod 507 is slidably connected inside the spring sleeve 506. A support rod floating spring 508 is provided between the floating support rod 507 and the spring sleeve 506. A bearing-fitting rotating sleeve 509 is rotatably connected to the upper end of the floating support rod 507. A precision guide hole 510 is provided on the floating support rod 507 for the lower ejector pin 705 to pass through. The bearing-fitting rotating sleeve 509... A downward enlarged hole is provided for the lower ejector pin 705 to pass through; a fixed seat 511 is provided on the machine base 1 for limiting the limiting plate 505, and a raised top ring 512 is provided on the fixed seat 511 for limiting the floating support rod 507; both the displacement plate 502 and the tray 504 have outward enlarged holes for the bearing mating rotating sleeve 509 to pass through. The stator linear displacement module 501 can be any of the existing technologies, as long as it can drive the displacement plate 502 and the components mounted on it to the assembly station. In use, the positioning housing is placed on the tray 504 equipped with positioning components for pre-positioning. The stator linear displacement module 501 moves the tray 504 and stator housing to the assembly position. During the pressing of the rotor shaft by the upper ejector mechanism 4, the downward force of the rotor shaft, in conjunction with the upper and lower floating components 503, moves the tray 504 and the limiting plate 505 downward. After the limiting plate 505 abuts against the fixed seat 511, the convex top ring 512 pushes the floating support rod 507 upward, thereby causing the bearing and rotating sleeve 509 on the floating support rod 507 to be supported on the lower end of the spline sleeve on the stator housing, preventing the spline sleeve and the bearing outside from dislodging during the insertion and assembly of the rotor shaft. At the same time, due to the setting of the bearing and rotating sleeve 509, the spline mechanism 8 can be adjusted. When rotating the spline sleeve, it avoids sliding friction between the spline sleeve and the non-rotating support component, which could cause scratches on the spline sleeve. After assembly, due to the reset of the upper ejector mechanism 4 and the servo pressing mechanism 3, the tray 504 and the limit plate 505 can be reset under the drive of the upper and lower floating components 503, and the floating support rod 507 and the bearing-coordinated rotating sleeve 509 can be reset under the drive of the support rod floating spring 508.With this structure, the stator linear displacement module 501 can move the stator housing to the assembly station, achieving a high degree of automation. The upper and lower floating component 503 allows the tray 504 to float up and down during the assembly process, working with the fixed seat 511 to limit the position of the limiting plate 505, thus achieving buffering and positioning of the stator housing during assembly. The floating support rod 507, in conjunction with the support rod floating spring 508, can lift the bearing-fitting rotating sleeve 509 upwards during the assembly process through the action of the convex top ring 512, effectively supporting the lower end of the spline sleeve inside the stator housing and preventing the spline sleeve and bearing from dislodging. The bearing-fitting rotating sleeve 509 can rotate synchronously with the spline sleeve, avoiding sliding friction when adjusting the spline mechanism 8 and preventing scratches on the spline sleeve. The precision guide hole 510 provides accurate guidance for the lower ejector pin 705, ensuring the coaxiality of the lower ejector pin 705 and the rotor shaft, and improving the assembly accuracy. After assembly, each component can automatically reset under the action of the spring, facilitating the next operation.

[0023] In one embodiment, as shown in FIG6, the vertical floating assembly 503 includes a lower guide sleeve disposed on the displacement plate 502, a vertical floating guide rod slidably connected within the lower guide sleeve, and a housing floating spring disposed between the lower guide sleeve and the tray 504; the tray 504 is disposed at the upper end of the vertical floating guide rod, and the limiting plate 505 is disposed at the lower end of the vertical floating guide rod. In use, the vertical displacement of the vertical floating guide rod within the lower guide sleeve realizes the vertical adjustment of the tray 504 and the limiting plate 505. After assembly, the housing floating spring resets the tray 504 and the limiting plate 505. With this structure, the cooperation between the lower guide sleeve and the upper and lower floating guide rods provides accurate guidance for the up and down movement of the tray 504 and the limiting plate 505, ensuring smooth floating; the shell floating spring provides elastic support for the tray 504, plays a buffering role during the assembly process, avoids the stator shell from being subjected to severe impact, and protects the workpiece; at the same time, the elastic restoring force of the spring can drive the tray 504 and the limiting plate 505 to automatically reset after the assembly is completed.

[0024] In one embodiment, as shown in FIG7, the rotor end cover assembly loading slide 6 includes a loading rack 601, on which a rotor linear displacement module 602 is disposed, a rotor vertical displacement module 603 disposed on the rotor linear displacement module 602, and a rotor frame 604 disposed on the rotor vertical displacement module 603. A rotor positioning block 605 is disposed on the rotor frame 604. Both the rotor frame 604 and the rotor positioning block 605 are provided with a material release notch 606. The rotor linear displacement module 602 and the rotor vertical displacement module 603 can both adopt existing technologies, as long as their working principle can be achieved. In use, the rotor end cover assembly is positioned on the rotor frame 604 with a rotor positioning block 605. The rotor end cover assembly is linearly displaced by the rotor linear displacement module 602. After reaching the preset position, the rotor vertical displacement module 603 can move the rotor frame 604 and the rotor positioning block 605 up and down, thereby cooperating with the servo pressing mechanism 3 and other components to achieve the initial positioning of the rotor end cover assembly. After the initial positioning, the vertical displacement module continues to move downward to disengage the rotor positioning block 605 from the lower end of the rotor, and the rotor linear displacement module 602 drives the linear reset. During the linear reset, the rotor shaft can be moved out from the stripping notch 606. Finally, the rotor vertical displacement module 603 performs lifting and lowering reset. With this structure, the cooperation between the rotor linear displacement module 602 and the vertical displacement module enables accurate transfer of the rotor end cover assembly in both horizontal and vertical directions, ensuring its accurate arrival at the assembly station and improving the loading and positioning accuracy. The rotor positioning block 605 can reliably position the rotor end cover assembly, ensuring its stable posture during the transfer and initial assembly stages. The design of the unloading notch 606 facilitates the smooth disengagement of the rotor shaft in the rotor end cover assembly from the rotor positioning block 605 after initial positioning, without interfering with the assembly action of the rotor shaft. This achieves seamless connection between the loading, positioning, and unloading processes of the rotor end cover assembly, improving assembly efficiency.

[0025] In one embodiment, as shown in Figures 8 and 9, the lower ejector mechanism 7 includes an ejector frame 701 disposed on the lower side of the machine base 1. An ejector displacement slide rail 702 is disposed on the ejector frame 701. An ejector mounting slide plate 703 is slidably connected to the ejector displacement slide rail 702. An ejector displacement rodless cylinder 704 is disposed on the ejector frame 701 for driving the ejector mounting slide plate 703 to move up and down. A lower ejector 705 is mounted on the ejector mounting slide plate 703. A coarse guide sleeve 706 is disposed on the machine base 1 for coarsely guiding the lower ejector 705. In use, the ejector pin displacement rodless cylinder 704 drives the ejector pin mounting slide plate 703 to move up and down on the ejector pin displacement slide rail 702. The coarse guide sleeve 706 provides coarse guidance for the lower ejector pin 705 to prevent large deviations from the lower ejector pin 705. Finally, during the assembly process, the lower ejector pin 705 is precisely guided by the fine guide hole 510 on the floating support rod 507. With this structure, the rodless cylinder 704 for ejector displacement drives the lower ejector pin 705 to move up and down along the ejector pin displacement slide rail 702 via the ejector pin mounting slide plate 703. The response is rapid and the movement is smooth, accurately controlling the position of the lower ejector pin 705. Together with the upper ejector pin 402, it provides reliable support for both ends of the rotor shaft. The coarse guide sleeve 706 provides initial guidance for the lower ejector pin 705 during its ascent, preventing large deviations and laying the foundation for accurate guidance through the fine guide hole 510 of the floating support rod 507. This ensures the coaxiality of the lower ejector pin 705 and the rotor shaft, improving assembly accuracy.

[0026] In one embodiment, as shown in Figures 8 and 9, the spline alignment mechanism 8 includes an alignment frame 801 disposed on the lower side of the machine base 1. The alignment frame 801 is provided with an alignment displacement slide rail 802, and an alignment slide plate 803 is slidably connected to the alignment displacement slide rail 802. The alignment frame 801 is provided with an alignment displacement rodless cylinder 804 for driving the alignment slide plate 803 to move up and down. The alignment slide plate 803 is provided with an alignment servo motor 805. An alignment floating sleeve 806 is provided at the output end of the alignment servo motor 805. A transmission shaft 807 is axially slidably connected inside the alignment floating sleeve 806. An alignment floating spring is provided between the lower end of the transmission shaft 807 and the alignment floating sleeve 806. A rotary plug-in 808 is provided at the upper end of the transmission shaft 807. Among them, the rotary plug-in 808 has a U-shaped structure, which can lock the slotted shaft used to drive the spline sleeve to rotate, thereby adjusting the stator spline inside the spline sleeve. In use, the alignment slide plate 803, equipped with an alignment servo motor 805, moves up and down on the alignment slide rail 802 via the alignment displacement rodless cylinder 804. During the upward movement of the alignment servo motor 805, it drives the drive shaft 807 mounted on it to move until the rotating plug 808 at the upper end of the drive shaft 807 abuts against the slotted shaft on the stator housing. Simultaneously, the drive shaft 807 moves downward within the alignment floating sleeve 806, compressing the alignment floating spring. Subsequently, the alignment servo motor 805 drives the drive shaft 807 and the rotating plug 808 to rotate. When the rotating plug 808 rotates to a certain position, its slot corresponds to the slotted shaft, and under the thrust of the compressed alignment floating spring, the rotating plug 808 engages with the slotted shaft. Finally, the alignment servo motor 805 drives the slotted shaft to rotate, thus realizing the rotation of the spline sleeve. This structure utilizes a rodless cylinder 804 for alignment displacement, which drives the alignment slide plate 803 to move up and down along the alignment displacement rail 802. This accurately controls the lifting and lowering of the rotary plug-in 808, ensuring its precise alignment with the slotted shaft inside the stator housing. The alignment servo motor 805 provides rotational power for spline adjustment, accurately controlling the rotation angle of the slotted shaft to ensure alignment between the stator and rotor splines. The coordination of the alignment floating sleeve 806, the drive shaft 807, and the alignment floating spring allows the rotary plug-in 808 to have a certain amount of axial floating, ensuring reliable alignment with the slotted shaft while preventing damage from hard collisions. The rotary plug-in 808 effectively clamps the slotted shaft, ensuring stable torque transmission, achieving efficient spline adjustment, increasing the spline alignment success rate, and reducing the risk of spline damage.

[0027] In one embodiment, such as Figure 10As shown, a circumferential limiting pin 809 is provided on the drive shaft 807, and an axial displacement limiting sliding hole for the pin 806 is provided to cooperate with the axial displacement of the circumferential limiting pin 809. In use, the circumferential limiting pin 809 achieves circumferential limiting of the drive shaft 807 relative to the axial floating sleeve 806, and the axial displacement limiting sliding hole for the pin achieves axial displacement of the drive shaft 807 within the axial floating sleeve 806, while preventing the drive shaft 807 from dislodging. This structure, with the circumferential limiting pin 809 and the axial displacement limiting sliding hole of the pin rod, can both restrict the circumferential rotation of the drive shaft 807 relative to the alignment floating sleeve 806, ensuring that the torque of the alignment servo motor 805 can be reliably transmitted to the drive shaft 807 and the rotary plug-in 808, thus guaranteeing the stability of spline adjustment; and allow the drive shaft 807 to slide within a certain range in the axial direction, meeting the axial floating requirements when the rotary plug-in 808 is connected to the slotted shaft, while preventing the drive shaft 807 from coming out of the alignment floating sleeve 806. The ingenious structural design improves the reliability and safety of the spline mechanism 8.

[0028] In this application, the power source for each cylinder can utilize existing technology, namely, connecting to an air compressor via existing compressed air delivery pipes. The air compressor comprises existing components such as a power system, compressor main unit, intake system, exhaust system, cooling system, lubrication system, control system, and air tank, thereby providing compressed air to power the cylinders. Each motor in this application is connected to a power source via cable, thus using electrical energy as its power source.

[0029] Working principle: The stator housing is placed on the tray 504 of the stator housing loading slide 5 by external manual labor or a multi-axis robot. The tray 504 provides initial elastic support through the upper and lower floating components 503 (lower guide sleeve, upper and lower floating guide rods, and housing floating springs), and the stator positioning component pre-positions the stator housing. Subsequently, the stator linear displacement module 501 is activated, driving the displacement plate 502, the tray 504, and the stator housing to move horizontally until the stator housing reaches the preset assembly position. Similarly, the external equipment places the rotor end cover assembly on the rotor frame 604 of the rotor end cover assembly loading slide 6, and the rotor positioning block 605 pre-positions the rotor end cover assembly. The rotor linear displacement module 602 drives the rotor frame 604 and the rotor end cover assembly to move horizontally, and the rotor vertical displacement module 603 adjusts the height to accurately transfer the rotor end cover assembly to the assembly position, corresponding vertically to the stator housing.

[0030] The rodless cylinder 704 of the lower ejector mechanism 7 is activated, which drives the ejector mounting slide 703 to rise along the ejector displacement slide rail 702. The lower ejector 705 passes through the coarse guide sleeve 706 on the machine base 1 to achieve coarse guidance. It continues to rise and passes through the fine guide hole 510 of the floating support rod 507 of the stator housing loading slide 5 to achieve fine guidance. Finally, it supports the lower end of the spline sleeve inside the stator housing and provides bottom support for the rotor shaft.

[0031] When the servo cylinder 303 of the servo pressing mechanism 3 is activated, it drives the lifting frame 301 to descend along the lifting slide rail 302. The balancing cylinder 304 works synchronously to balance the weight of the lifting frame 301 and ensure smooth movement. The lifting frame 301 drives the upper ejector mechanism 4 to descend synchronously. The upper ejector 402 cooperates with the lower ejector 705 to initially press against the two ends of the rotor shaft in the rotor end cover assembly from the upper and lower ends, realizing the initial coaxial positioning of the rotor shaft.

[0032] The servo pressing mechanism 3 continues to drive the upper ejector pin 402 to descend. At the same time, the rotor vertical displacement module 603 of the rotor end cover assembly loading slide 6 follows the descent of the servo pressing mechanism 3, driving the rotor frame 604 to descend. Together, they push the rotor shaft axially into the shaft cavity of the stator housing, completing the initial axial positioning of the stator housing and the rotor end cover assembly. The rotor vertical displacement module 603 continues to drive the rotor frame 604 to descend a certain distance, causing the rotor end cover assembly to disengage from the rotor positioning block 605. Subsequently, the rotor linear displacement module 602 drives the rotor frame 604 to reset horizontally. Through the stripping notch 606 on the rotor frame 604 and the positioning block, interference with the rotor shaft is avoided. The rotor vertical displacement module 603 drives the rotor frame 604 to rise and reset, making room for subsequent assembly.

[0033] The upper ejector mechanism 4, in conjunction with the support of the lower ejector 705, drives the rotor shaft to continue to penetrate deeper into the stator shaft cavity until the distance between the rotor spline and the stator spline (located inside the spline sleeve) reaches the preset limit value.

[0034] At this time, the alignment displacement rodless cylinder 804 drives the alignment slide plate 803 to rise along the alignment displacement slide rail 802. The rotating plug 808 at the upper end of the drive shaft 807 passes through the machine base 1 and connects to the slotted shaft (the driving component of the spline sleeve) inside the stator housing. Then, the drive shaft 807 slides axially within the alignment floating sleeve 806, and the alignment floating spring is compressed (the circumferential limit pin 809 slides along the pin rod axial displacement limit sliding hole to ensure that the drive shaft 807 rotates synchronously in the circumferential direction and does not come out). The alignment servo motor 805 starts and drives the rotating plug 808 to rotate through the alignment floating sleeve 806 and the drive shaft 807 to engage the slotted shaft, thereby driving the slotted shaft and spline sleeve to rotate and adjust the stator spline angle. Until the stator spline and rotor spline are completely aligned, the alignment mechanism stops working, and the alignment displacement rodless cylinder 804 drives the alignment slide plate 803 to descend and reset.

[0035] Subsequently, the floating positioning cylinder of the floating positioning assembly 410 is activated, causing the floating positioning pin to exit from the floating positioning hole of the floating plate 406, thus releasing the fixation of the floating plate 406. At this time, the floating plate 406 can float slightly in the horizontal direction under the action of the reverse-mounted plane bearing 405. The servo pressing mechanism 3 drives the lifting frame 301 to continue to descend, and the end cover pressing rod 408 presses the upper end of the end cover. The floating characteristics of the floating plate 406 can automatically compensate for the installation deviation between the end cover and the stator housing, ensuring that the end cover is accurately installed in the preset position of the stator housing. At the same time, the pressing cylinder 413 drives the lower self-locking wedge 414 to engage with the upper self-locking wedge 415 to maintain the end cover in a pressed state, thereby completing the installation of the end cover.

[0036] After the end cover is assembled, the clamping cylinder 413 resets and releases its self-locking mechanism; the tensioning cylinder 401 drives the tensioning plate 403 to rise, causing the end cover clamping rod 408 to disengage from the end cover; the servo pressing mechanism 3 continues to drive the upper ejector pin 402 to descend, pushing the rotor shaft to move further along the axial direction, and pressing the rotor spline completely into the stator spline sleeve, thus achieving the final assembly of the rotor and stator.

[0037] After assembly, the servo cylinder 303 drives the lifting frame 301 to rise, and the upper ejector pin 402 moves upward and resets accordingly; the ejector pin displacement rodless cylinder 704 of the lower ejector pin mechanism 7 drives the lower ejector pin 705 to descend and reset; the upper and lower floating components 503 of the stator housing loading slide 5, under the action of the housing floating spring, drive the tray 504 and the limit plate 505 to rise and reset; the floating support rod 507 resets under the action of the support rod floating spring 508; the stator linear displacement module 501 drives the assembled stator housing to move out of the assembly station, waiting for external equipment to pick up the material, completing one assembly cycle.

[0038] Beneficial effects: Through the coordinated work of various mechanisms, the assembly of the stator and rotor is automated, reducing manual intervention, lowering labor intensity, and improving production efficiency; the dedicated spline alignment mechanism 8 accurately adjusts the alignment of the stator and rotor splines, ensuring accurate spline alignment and preventing damage to components caused by misalignment; the use of structures such as the reverse-mounted flat bearing 405, the floating positioning mandrel 404, and the bearing-fitting rotating sleeve 509 enables floating adjustment of components during assembly, preventing scratches and damage to components caused by hard contact; and the detachable tooling plate 407 and other structures facilitate adjustments for different product models, improving the equipment's versatility.

[0039] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge or conventional technology in the field. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new energy electric drive assembly line stator-rotor combined assembly machine, characterized in that: The system includes a machine base, a frame mounted on the machine base, a servo pressing mechanism mounted on the upper end of the frame, an upper ejector mechanism mounted on the lower end of the servo pressing mechanism, a stator housing loading slide mounted on the machine base, a rotor end cover assembly loading slide mounted on the machine base corresponding to one side of the stator housing loading slide, a lower ejector mechanism mounted on the machine base corresponding to the position below the upper ejector mechanism, and a spline alignment mechanism mounted on the machine base for spline alignment.

2. The new energy electric drive assembly line permanent magnet motor rotor assembling machine according to claim 1, characterized in that: The servo pressing mechanism includes a lifting frame; the upper ejector mechanism includes a tensioning cylinder and an upper ejector pin mounted on the lifting frame. A tensioning plate is provided at the lower end of the tensioning cylinder. Multiple floating positioning spindles are provided on the tensioning plate. Each floating positioning spindle is provided with a pair of reverse-mounted plane bearings. A floating plate is provided on the reverse-mounted plane bearings. A tooling plate is detachably connected to the lower side of the floating plate. An end cap clamping rod and an end cap positioning pin are provided on the tooling plate. An upper expansion hole is provided on the tensioning plate, the floating plate, and the tooling plate to cooperate with the upper ejector pin through. A floating positioning component for fixing the position of the floating plate is provided on the tensioning plate.

3. The new energy electric drive assembly line rotor assembling machine according to claim 2, characterized in that: The servo pressing mechanism includes a lifting frame, a lifting slide rail vertically arranged on the lifting frame, and a servo pressing cylinder arranged on the frame; the output end of the servo pressing cylinder is arranged on the lifting frame, and the sliding seat of the lifting slide rail is fixedly connected to the frame.

4. The new energy electric drive assembly line rotor assembling machine according to claim 1, characterized in that: The stator housing loading slide includes a stator linear displacement module mounted on the machine base and a displacement plate mounted on the stator linear displacement module. Multiple sets of upper and lower floating components are mounted on the displacement plate. A tray is mounted at the upper end of each upper and lower floating component, and a limit plate is mounted at the lower end of each upper and lower floating component. A spring sleeve is mounted on the limit plate, and a floating support rod is slidably connected inside the spring sleeve. A support rod floating spring is mounted between the floating support rod and the spring sleeve. A bearing-fitting rotating sleeve is rotatably connected to the upper end of the floating support rod. A fine guide hole for the lower ejector pin to pass through is provided on the floating support rod, and a lower expansion hole for the lower ejector pin to pass through is provided on the bearing-fitting rotating sleeve. A fixing seat for limiting the limit plate is mounted on the machine base, and a convex top ring for limiting the floating support rod is provided on the fixing seat. Both the displacement plate and the tray have an outer expansion hole for the bearing-fitting rotating sleeve to pass through.

5. The new energy electric drive assembly line rotor assembling machine according to claim 4, characterized in that: The upper and lower floating assembly includes a lower guide sleeve disposed on the displacement plate, an upper and lower floating guide rod slidably connected inside the lower guide sleeve, and a housing floating spring disposed between the lower guide sleeve and the tray; the tray is disposed at the upper end of the upper and lower floating guide rods, and the limiting plate is disposed at the lower end of the upper and lower floating guide rods.

6. The new energy electric drive assembly line rotor assembling machine according to claim 1, characterized in that: The rotor end cover assembly loading slide includes a loading frame, on which a rotor linear displacement module, a rotor vertical displacement module mounted on the rotor linear displacement module, and a rotor frame mounted on the rotor vertical displacement module are provided. A rotor positioning block is provided on the rotor frame. Both the rotor frame and the rotor positioning block are provided with a material removal notch.

7. The stator and rotor assembly machine for a new energy electric drive assembly line according to claim 1, characterized in that: The lower ejector mechanism includes an ejector frame disposed on the lower side of the machine base, an ejector displacement slide rail disposed on the ejector frame, an ejector mounting slide plate slidably connected to the ejector displacement slide rail, an ejector displacement rodless cylinder disposed on the ejector frame for driving the ejector mounting slide plate to move up and down, and a lower ejector pin disposed on the ejector mounting slide plate; a coarse guide sleeve disposed on the machine base for coarsely guiding the lower ejector pin.

8. The new energy electric drive assembly line rotor assembling machine according to claim 1, characterized in that: The spline alignment mechanism includes an alignment frame mounted on the lower side of the machine tool, an alignment displacement slide rail mounted on the alignment frame, an alignment slide plate mounted on the alignment displacement slide rail, a rodless alignment displacement cylinder mounted on the alignment frame for driving the alignment slide plate to move up and down, an alignment servo motor mounted on the alignment slide plate, an alignment floating sleeve mounted at the output end of the alignment servo motor, a drive shaft axially slidably connected inside the alignment floating sleeve, an alignment floating spring mounted between the lower end of the drive shaft and the alignment floating sleeve, and a rotary plug-in mechanism mounted at the upper end of the drive shaft.

9. The new energy electric drive assembly line rotor assembling machine according to claim 8, characterized in that: The drive shaft is provided with a circumferential limiting pin, and the alignment floating sleeve is provided with a pin axial displacement limiting sliding hole for cooperating with the axial displacement of the circumferential limiting pin.

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