A new energy vehicle electric drive press-fitting equipment and its usage method

Abstract

This invention relates to a new energy vehicle electric drive press-fitting equipment and its usage method, including a heat-shrink press-fitting device, a stator-rotor assembly device, and a rotor press-fitting device. The heat-shrink press-fitting device includes a heat-shrinking device, a platform, a floating support, and a floating device. The heat-shrinking device is used to heat the electric drive housing, and the floating device is used to grip the stator and place the stator into the heated electric drive housing. The rotor press-fitting device includes a pressure head guide device and a clamping block. The clamping block is driven up and down by an electric cylinder to press the pressure head onto the rotor. The stator-rotor assembly device includes a pressing device, a reducer, a clamping device, a gripper, and a dragging platform. The dragging platform is used to support the heated electric drive housing at the first station, the reducer is used to install the rotor, the gripper is used to clamp the electric drive housing, and the clamping device, driven by a motor, descends to assemble the stator and rotor. This invention solves the problem of coaxiality error in stator-rotor assembly and overcomes the influence of magnetic force between the stator and rotor on the assembly.

Description

Technical Field

[0001] This invention belongs to the field of press-fitting machine technology, and relates to a press-fitting equipment for electric drive systems of new energy vehicles, specifically a press-fitting equipment for electric drive systems of multiple models of new energy vehicles. Background Technology

[0002] In the assembly process of new energy motors, the stator and rotor assembly equipment is a crucial link. However, this stage currently faces several problems, mainly including: 1) Insufficient automation: The automation level of the assembly equipment is not high enough, still requiring significant manual intervention. This not only affects production efficiency but also increases the risk of assembly defects caused by human error; 2) Assembly efficiency issues: Some equipment is slow in the assembly process, especially when handling larger or more complex stators and rotors, where efficiency problems are particularly prominent and cannot meet the needs of mass production; 3) Equipment compatibility issues: Different types and specifications of motor stators and rotors require different equipment or equipment adjustments for assembly. The existing equipment lacks compatibility and flexibility, resulting in frequent equipment changes and long adjustment times. These problems affect the production efficiency and quality of new energy motors. Therefore, improvements are needed in equipment upgrades, automation enhancement, and process optimization. Summary of the Invention

[0003] The technical problem to be solved by this invention is to overcome the aforementioned problems existing in the prior art, and to provide an electric drive press-fitting device for new energy vehicles. This invention has a reasonable design and compact structure. By designing an electric drive press-fitting device, it solves the problem of coaxiality error in stator and rotor assembly and overcomes the influence of magnetic force between the stator and rotor on the assembly.

[0004] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0006] A new energy vehicle electric drive press fitting equipment includes a heat fitting device, a stator and rotor assembly device, and a rotor press fitting device.

[0007] The heat fitting device includes a heat fitting equipment 104, a loading platform 105, a floating support platform 109, and a floating device 112;

[0008] The platform 105 and the floating platform 109 are set on the first work station slide, and the heat fitting device 104 and the floating device 112 are respectively set on the upper part; the heat fitting device 104 is used to heat the electric drive housing, and the floating device 112 is used to grab the stator and put the stator into the heated electric drive housing.

[0009] The rotor pressing device includes a pressing head guide device 301 and a pressing block 307;

[0010] The clamping block 307 is located below the pressure head guide device 301. The clamping block 307 is driven up and down by an electric cylinder to press the pressure head onto the rotor.

[0011] The stator and rotor assembly device includes a pressing device 201, a reducer 206, a clamping device 207, a gripper 208, and a dragging platform 210.

[0012] The reducer 206 and the drag table 210 are set on the slide of the second station. The drag table 210 is used to support the electric drive housing after it is heated in the first station. The reducer 206 is used to install the rotor. A clamping device 207 is set above the reducer 206. A gripper 208 is set on the clamping device 207. The gripper 208 is used to clamp the electric drive housing. The clamping device 208 is driven by the motor to descend and assemble the stator and rotor.

[0013] Furthermore, the pressure head is configured with different models and is press-fitted onto the rotor.

[0014] Furthermore, the heat-shrinking device 104 is provided with a slot structure for replacing the heating head in different models of heat-shrinking devices, which can heat different models of electric drive housings to adapt to different models of stators and to match the pressure heads on the stator with different models of rotors.

[0015] Furthermore, a new energy vehicle electric drive press-fitting equipment also includes a vertical guide rail 202 and a positioning bearing 209;

[0016] The clamping device 207 moves the vertical guide rail 202 downward through the action of the electric cylinder, and the positioning bearing 209 is used to position the electric drive housing.

[0017] Furthermore, a new energy vehicle electric drive press-fitting equipment also includes fastening bolts 203;

[0018] Fastening bolt 203 is used to lock the electric drive housing.

[0019] Furthermore, a new energy vehicle electric drive press-fitting equipment also includes a height detection device;

[0020] The floating support 109 can be adjusted up and down according to the height requirement, and the height detection device is used to detect the adjusted height of the floating support 109.

[0021] A method for using electric drive press-fitting equipment for new energy vehicles, characterized in that:

[0022] The station where the heat fitting press-fitting device is located is the first station, the station where the stator and rotor assembly device is located is the second station, and the station where the rotor press-fitting device is located is the third station. The heat fitting press-fitting device at the first station presses the stator and the rotor press-fitting head at the third station presses the stator and rotor at the third station simultaneously or sequentially, and then the stator and rotor assembly at the second station is carried out.

[0023] Further, at the first station: the platform 105 and the floating support 109 slide outwards, and the electric drive housing and the stator are placed into the platform 105 and the floating support 109 respectively by manual handling. The slide of the first station slides into the heat fitting device, and the electric drive housing is adjusted to be directly below the heat fitting device 104. The heat fitting device 104 is driven to move downwards by the cylinder 110 to heat the electric drive housing, and the stator gripper 111 grabs the stator in the floating support 109. The slide of the first station moves horizontally, and the heated electric drive housing is located below the stator gripper 111. The stator gripper 111 descends and puts the stator into the heated electric drive housing.

[0024] Further, in the third station: the rotor 303 is placed on the rotor placement platform 308 by hand, the rotor 303 is installed into the corresponding pressure head, and it is manually moved to the rotor support platform 305 on the base 306. The rotor support platform 305 is adjusted to adjust the rotor to be directly below the pressing block 307. The electric cylinder drives the pressing block 307 to move downward along the direction of the pressure head guide device 301 to press the rotor and the pressure head together. The pressing block 307 returns to its original position.

[0025] Further, the second station slide slides out, and the electric drive housing, which has been heated at the first station, is manually moved to the drag platform 210 on the second station slide next to the reducer 206. The second station slide is reset, and the top of the drag platform 210 is aligned with the clamping device 207. The clamping device 207 moves down along the vertical guide rail 202 under the action of the electric cylinder, and the positioning bearing 209 positions the electric drive housing. The gripper 208 clamps the electric drive housing, and the fastening bolt 203 locks the electric drive housing. The clamping device 208 rises, and the reducer 206 is manually hoisted and placed on the second station slide. The second station slide moves horizontally, and the top of the reducer 206 is aligned with the clamping device 207. Then, the rotor and wave spring pressed in at the third station are manually moved and pressed into the reducer 206. The clamping device 208, driven by the electric cylinder, descends to assemble the stator and rotor.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] This invention not only ensures consistent assembly quality for each product but also avoids discrepancies that may occur during manual operation, thus improving overall product quality. Furthermore, by changing tooling, it enables multi-functional pressing of multiple motor models on a single machine, and allows for automatic material handling and assembly of rotor and stator assemblies. This improves production and assembly efficiency while reducing labor and space constraints. Attached Figure Description

[0028] The invention will now be further described with reference to the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the heat fitting device.

[0030] Figure 2 for Figure 1 Schematic diagram of the middle stage and floating support structure;

[0031] Figure 3a Schematic diagram of the stator and rotor assembly device Figure 1 ;

[0032] Figure 3b Schematic diagram of the stator and rotor assembly device Figure 2 ;

[0033] Figure 4 This is a schematic diagram of the rotor pressing device.

[0034] Figure 5 Schematic diagram of the track used for the electric cylinder;

[0035] Figure 6 This is a schematic diagram of the slot structure of the heat fitting equipment;

[0036] Figure 7 This is a schematic diagram of the height detection device and the floating support structure;

[0037] Figure 8 This is a sectional view of the height detection device and floating support structure;

[0038] Figure 9a This is a schematic diagram of the floating device structure;

[0039] Figure 9b This is a sectional view of the floating device structure;

[0040] Figure 10 This is a schematic diagram of the clamping device.

[0041] Figure 11a A schematic diagram of the structure used for fastening bolts;

[0042] Figure 11b A sectional view of the structure used for fastening bolts;

[0043] Figure 12aThis is a schematic diagram of the rotor mounted on the reducer.

[0044] Figure 12b A cross-sectional view of the rotor mounted on the reducer;

[0045] Figure 13 This is a schematic diagram of the positioning structure of the positioning bearing;

[0046] Figure 14a This is a schematic diagram showing the stator and rotor after they are clamped together.

[0047] Figure 14b This is a cross-sectional view of the stator and rotor after they are clamped together.

[0048] Figure 15a Schematic diagram of the pressure head structure Figure 1 ;

[0049] Figure 15b Cross-section of the indenter structure Figure 1 ;

[0050] Figure 16a Schematic diagram of the pressure head structure Figure 2 ;

[0051] Figure 16b Cross-section of the indenter structure Figure 2 ;

[0052] Figure 17a Schematic diagram of the pressure head structure (3);

[0053] Figure 17b This is a cross-sectional view of the pressure head structure;

[0054] Figure 18 Schematic diagram of pressure heads with different structures for pressing the clamping block;

[0055] Figure 19 Schematic diagram of different pressure head structures for rotor installation;

[0056] Figure 20 This is a schematic diagram of the overall structure of the electric drive press-fitting equipment for new energy vehicles. Figure 1 ;

[0057] Figure 21 This is a schematic diagram of the overall structure of the electric drive press-fitting equipment for new energy vehicles. Figure 2 ;

[0058] Figure 22 Schematic diagram of the overall structure of the electric drive press-fitting equipment for new energy vehicles (Figure 3);

[0059] In the diagram: 101: Electric cylinder; 102: Power supply device; 103: Water system; 104: Heat fitting equipment; 105: Platform; 106: Positioning bolt; 107: Height detection device; 108: Housing positioning support; 109: Floating platform; 110: Cylinder; 111: Stator gripper; 112: Floating device; 201: Pressing device; 202: Vertical guide rail; 203: Fastening bolt; 204: Pneumatic guide rail; 205: Quick-change knob; 206: Reducer; 207: Clamping device; 208: Claw gripper; 209: Positioning bearing; 301: Pressure head guide device; 302: Single rail double slider; 303: Rotor; 304: Adjusting bolt; 305: Rotor support; 306: Base; 307: Clamping block; 308: Rotor placement platform. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting the invention. In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention.

[0061] The purpose of this invention is to provide a multi-model electric drive press-fitting equipment for new energy vehicles, which solves the coaxiality error in stator and rotor assembly, overcomes the influence of magnetic force between the stator and rotor on assembly, and allows production to be completed without a large amount of manual labor. This invention is rationally designed and compactly structured. By designing an electric drive press-fitting equipment, it solves the coaxiality error in stator and rotor assembly and overcomes the influence of magnetic force between the stator and rotor on assembly. This improves production assembly efficiency and reduces labor and space requirements.

[0062] See Figure 1 , Figure 2 , Figure 3a , Figure 3b , Figure 4 , Figure 20 , Figure 21 , Figure 22This specific embodiment of a multi-model electric drive press-fitting equipment for new energy vehicles comprises a heat-shrink press-fitting device, a stator-rotor assembly device, and a rotor press-fitting device.

[0063] The heat fitting press-fitting device includes a motor 101, a power supply device 102, a water system 103, a heat fitting device 104, a platform 105, positioning bolts 106, a height detection device 107, a housing positioning support 108, a floating platform 109, a cylinder 110, a stator gripper 111, and a floating device 112. The platform 105 and the floating platform 109 are set on the first work station slide, and the heat fitting device 104 and the floating device 112 are correspondingly set above them. The heat fitting device 104 is used to heat the electric drive housing, and the floating device 112 is used to grip the stator and place the stator into the heated electric drive housing.

[0064] See Figure 21 The station where the heat fitting press-fitting device is located is the first station. First, the heat fitting press-fitting device is placed in the first station. Figure 2 The platform 105 and floating support 109 shown slide outwards. The electric drive housing and stator are manually placed into the platform 105 and the floating support 109 above the housing positioning support 108, respectively. The first station slide slides in. The first station slide slides into the heat-fitting device, and the electric drive housing is adjusted to be directly below the heat-fitting equipment 104 using the positioning bolts 106. The power supply device 102 supplies power to the heat-fitting equipment 104 for heating. After heating is complete, the cylinder 110 drives the heat-fitting equipment 104 to move downwards to heat the electric drive housing. After heating is complete, the heating head of the heat-fitting equipment 104 resets. The stator gripper 111 grabs the stator from the floating support 109 above the housing positioning support 108. The fastening bearing in the floating device 112 ensures that the stator does not shift laterally during loading and unloading. Figure 9a , Figure 9b As shown. The slide moves horizontally, and the heated electric drive housing is located below the stator gripper 111. The stator gripper 111 descends to place the stator into the heated electric drive housing.

[0065] like Figure 6 As shown, the heat-shrinking device 104 is equipped with a slot structure for replacing the heating head in different models of heat-shrinking devices. This allows for heating different models of electric drive housings to accommodate different stators, and further adapts to matching with the pressure heads on different models of rotors. For example... Figure 7 , Figure 8 As shown, the floating platform can be adjusted up and down according to the height requirements, and the height detection device 107 is used to detect the adjusted height.

[0066] See Figure 3a , Figure 3bThe stator and rotor assembly device includes a pressing device 201, a vertical guide rail 202, fastening bolts 203, a pneumatic guide rail 204, a quick-change knob 205, a reducer 206, a clamping device 207, a gripper 208, a positioning bearing 209, and a dragging platform 210. The reducer 206 and the dragging platform 210 are set on the slide of the second station. The dragging platform 210 is used to support the electric drive housing after it has been heated in the first station. The reducer 206 is used to install the rotor. The clamping device 207 is set above it. The gripper 208 is set on the clamping device 207 and is used to clamp the electric drive housing. The clamping device 208 is driven by an electric cylinder to descend and assemble the stator and rotor.

[0067] See Figure 20 The stator and rotor assembly device is located at the second station. The slide table of the second station slides out, and the electric drive housing, heated at the first station, is manually moved onto the drag platform 210 on the slide table next to the reducer 206. The second station slide table returns to its original position, and the drag platform 210 is aligned with the clamping device 207. The clamping device 207 moves downward along the vertical guide rail 202 under the action of an electric cylinder, and the positioning bearing 209 positions the electric drive housing. Figure 13 As shown; the gripper 208 grips the electric drive housing, and the fastening bolt 203 locks the electric drive housing in place, as... Figure 10 , Figure 11a , Figure 11b As shown. The clamping device 208 rises, and the reducer 206 is manually hoisted and placed on the second station slide. The second station slide moves horizontally, aligning the top of the reducer 206 with the clamping device 207. Then, the rotor and wave spring from the third station are manually moved and pressed into the reducer 206. Driven by a motor, the clamping device 208 descends to assemble the stator and rotor. Figure 12a , Figure 12b The electric cylinder is... Figure 5 The slide rail shown can be slid to the corresponding position as needed for the second or third station, driving the clamping device 208 or clamping block 307 to move up and down. The quick-change knob 205 is used to quickly switch the position of the reducer 206 on the slide table of the second station.

[0068] See Figure 4 The rotor pressing device includes a pressure head guide device 301, a single-rail double-slider 302, a rotor 303, an adjusting bolt 304, a rotor support 305, a base 306, a pressing block 307, and a rotor placement platform 308. The pressing block 307 is located below the pressure head guide device 301 and is driven up and down by an electric cylinder to press different types of pressure heads onto the rotor. (See reference...) Figure 19 , Figure 22The rotor 303 is placed on the rotor placement platform 308 by hand, the rotor 303 is installed into the corresponding pressure head, and it is manually moved to the rotor support platform 305 on the base 306. The rotor support platform 305 is adjusted to adjust the rotor to be directly below the pressure block 307. The electric cylinder drives the pressure block 307 to move downward along the direction of the pressure head guide device 301 to press the rotor and the pressure head together. The pressure block 307 returns to its original position.

[0069] Different pressure heads with different structures can be equipped according to the shape and size of the rotor and stator. For details on installing different pressure heads on the rotor, please refer to [link / reference]. Figure 15a , Figure 15b , Figure 16a , Figure 16b , Figure 17a , Figure 17b , Figure 18 , Figure 19 Then it is assembled with the stator, and after assembly, it is as follows: Figure 14a , Figure 14b The stator can be adapted to different stator structures depending on the pressure head installed on the rotor.

[0070] This invention employs a holding brake electric cylinder, directly mounted on the slide plate, with the flange face on the end cover. A pressure calibration device is connected to the upper and lower parts of the electric cylinder, and this device can be freely disassembled. The tooling plate is connected by two screws and then directly locked to the electrode plate using pin positioning. The extended structure uses a 600° stroke and a Mitsubishi linear guide rail. In the heat-fitting press-fitting station, manual loading is used to place the stator and housing into the slide. The slide advances, the heating head descends to heat the housing, and the gripper picks up the stator. After heating, the heating head resets, the slide moves horizontally, and the gripper descends to fit the stator into the housing. In the assembly station, the reducer is manually hoisted in, and the stator housing assembly is manually transferred from the heat-fitting station. The slide advances, the gripper picks up the stator housing assembly, the slide moves horizontally, and the wave spring and rotor are manually installed. The gripper descends for automatic assembly, pre-tightening at least three assembly box bolts. In the press-fitting station, the parts are manually installed into the corresponding press head, the press head is fitted onto the rotor, and the electric cylinder drives the slide table to press down, completing the press-fitting process. The first station heat fitting and the third station rotor fitting can be carried out simultaneously or sequentially, and then the second station stator and rotor assembly can be carried out.

[0071] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be included within the scope of protection of the present invention. Furthermore, all content not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. A new energy vehicle electric drive press-fitting equipment, characterized in that: This includes a heat-shrink pressing device, a stator-rotor assembly device, and a rotor pressing device; The heat fitting device includes a heat fitting device (104), a loading platform (105), a floating support platform (109), and a floating device (112); The stage (105) and the floating platform (109) are set on the first work station slide, and the heat-shrinking device (104) and the floating device (112) are respectively set above them; the heat-shrinking device (104) is used to heat the electric drive housing, and the floating device (112) is used to grab the stator and put the stator into the heated electric drive housing; The rotor pressing device includes a pressure head guide device (301) and a pressing block (307); The clamping block (307) is located below the pressure head guide device (301). The clamping block (307) is driven up and down by an electric cylinder to press the pressure head onto the rotor. The stator and rotor assembly device includes a pressing device (201), a reducer (206), a clamping device (207), a gripper (208), and a dragging platform (210); The reducer (206) and the drag table (210) are set on the slide of the second station. The drag table (210) is used to support the electric drive housing after it is heated in the first station. The reducer (206) is used to install the rotor. A clamping device (207) is set above the reducer (206). A gripper (208) is set on the clamping device (207). The gripper (208) is used to clamp the electric drive housing. The clamping device (208) descends under the drive of the motor to assemble the stator and rotor.

2. The electric drive press-fitting equipment for new energy vehicles according to claim 1, characterized in that: The pressure heads are configured in different models and are press-fitted onto the rotor.

3. The electric drive press-fitting equipment for new energy vehicles according to claim 2, characterized in that: The heat-shrinking device (104) is provided with a slot structure for replacing the heating head in different models of heat-shrinking devices, which can heat different models of electric drive housings to adapt to different models of stators and to match the pressure heads on the stator and rotor of different models.

4. The electric drive press-fitting equipment for new energy vehicles according to claim 1, characterized in that: It also includes a vertical guide rail (202) and a positioning bearing (209); The clamping device (207) moves the vertical guide rail (202) downward by the action of the electric cylinder, and the positioning bearing (209) is used to position the electric drive housing.

5. The electric drive press-fitting equipment for new energy vehicles according to claim 1, characterized in that: It also includes fastening bolts (203); The fastening bolt (203) is used to lock the electric drive housing.

6. The electric drive press-fitting equipment for new energy vehicles according to claim 1, characterized in that: It also includes a height detection device; The floating support (109) can be adjusted up and down according to the height requirement, and the height detection device is used to detect the height adjusted by the floating support (109).

7. The method of using a new energy vehicle electric drive press-fitting equipment according to any one of claims 1 to 6, characterized in that: The station where the heat fitting press-fitting device is located is the first station, the station where the stator and rotor assembly device is located is the second station, and the station where the rotor press-fitting device is located is the third station. The heat fitting press-fitting device at the first station presses the stator and the rotor press-fitting head at the third station presses the stator and rotor at the third station simultaneously or sequentially, and then the stator and rotor assembly at the second station is carried out.

8. The method of using a new energy vehicle electric drive press-fitting equipment according to claim 7, characterized in that: First station: The platform (105) and floating platform (109) slide outwards. The electric drive housing and stator are placed into the platform (105) and floating platform (109) respectively by manual handling. The first station slide slides into the heat fitting device and adjusts the electric drive housing to be directly below the heat fitting device (104). The heat fitting device (104) is driven to move downwards to heat the electric drive housing by the cylinder (110). The stator gripper (111) grabs the stator in the floating platform (109). The first station slide moves horizontally. The heated electric drive housing is located below the stator gripper (111). The stator gripper (111) descends and puts the stator into the heated electric drive housing.

9. The method of using a new energy vehicle electric drive press-fitting equipment according to claim 8, characterized in that: Third station: The rotor (303) is placed on the rotor placement platform (308) manually, the rotor (303) is installed into the corresponding pressure head, and it is manually moved to the rotor support platform (305) on the base (306). The rotor support platform (305) is adjusted to adjust the rotor to be directly below the pressing block (307). The electric cylinder drives the pressing block (307) to move downward along the direction of the pressure head guide device (301) to press the rotor and the pressure head together. The pressing block (307) returns to its original position.

10. The method of using a new energy vehicle electric drive press-fitting equipment according to claim 9, characterized in that: The second station slide slides out, and the electric drive housing, which has been heated in the first station, is manually moved to the drag platform (210) on the second station slide next to the reducer (206). The second station slide is reset, and the drag platform (210) is aligned with the clamping device (207). The clamping device (207) moves down along the vertical guide rail (202) under the action of the electric cylinder, and the positioning bearing (209) positions the electric drive housing. The gripper (208) clamps the electric drive housing, and the fastening bolt (203) locks the electric drive housing. The clamping device (208) rises, and the reducer (206) is placed on the second station slide by manual hoisting. The second station slide moves horizontally, and the reducer (206) is aligned with the clamping device (207). Then, the rotor and wave spring pressed in the third station are manually moved and pressed into the reducer (206). The clamping device (208) is driven by the electric cylinder to descend and assemble the stator and rotor.

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