Asynchronous motor integral pressing mechanism and stacking system

Abstract

The present invention discloses an integral press-fitting mechanism and stacking system for an asynchronous motor, including an integral press-fitting mechanism for the asynchronous motor, as well as a liquid nitrogen cooling mechanism and / or a heating mechanism. The liquid nitrogen cooling mechanism is used to cool the rotor shaft, and the heating mechanism is used to heat the rotor core and the dynamic balance plate. The integral press-fitting mechanism for the asynchronous motor is used to assemble the rotor core, the upper dynamic balance plate, the lower dynamic balance plate, and the rotor shaft into one body. The present invention reduces the diameter of the rotor shaft through the liquid nitrogen cooling mechanism, and heats the upper dynamic balance plate, the lower dynamic balance plate, and the cast aluminum rotor core respectively through the heating mechanism, making full use of the principle of thermal expansion and contraction. While minimizing the volume of the rotor shaft, the apertures of the upper dynamic balance plate, the lower dynamic balance plate, and the cast aluminum rotor core are increased to facilitate assembly.

Description

Technical Field

[0001] The present invention relates to the field of mechanical assembly, and particularly to an integral press-fitting mechanism and stacking system for an asynchronous motor. Background Art

[0002] The rotor of a motor product is a component composed of multiple materials and multiple parts. The rotor bears the function of converting electrical energy of the motor into mechanical energy, is the rotating part of the motor product, and is also a docking component with supporting equipment.

[0003] The motor rotor is composed of an upper dynamic balance plate, a lower dynamic balance plate, a cast aluminum rotor core, and a rotor shaft. The assembly of the motor rotor mainly uses the principle of thermal expansion and contraction for press-fitting. Usually, a hot sleeve type assembly is adopted, where the cast aluminum rotor core is heated, causing the aperture of the core to increase due to heat expansion, facilitating the rotor shaft to enter the inside of the cast aluminum rotor core.

[0004] For example, in a Chinese patent with an application number of: 201711201379.2 and a patent name of "A Rotor Core Hot Sleeve Shaft Equipment", a rotor core hot sleeve shaft equipment is described, which includes a frame, a manipulator, a heating mechanism, a positioning mechanism, a press shaft mechanism, a control panel, and a cooling mechanism arranged on the frame. The heating lifting device and the heating device of the heating mechanism are arranged in an up-and-down relative cooperation. The heating lifting device rises to a predetermined position for positioning the rotor core, and the heating device descends to heat the rotor core to a specified temperature; the pressing device and the positioning device of the positioning mechanism are arranged in an up-and-down cooperation. The manipulator places the heated rotor core on the positioning device, and the positioning device cooperates with the pressing device to press and position the rotor core; the press shaft mechanism is located above the pressing device and is correspondingly arranged in cooperation with the pressing device; the manipulator transfers the rotor shaft onto the press shaft mechanism, and the press shaft mechanism presses the rotor shaft and the positioned rotor core together to complete the press shaft process. This equipment heats the rotor core by means of hot sleeve heating, and at the same time, through the mutual cooperation of the positioning mechanism and the press shaft mechanism, the assembly of the rotor shaft and the rotor core is achieved. However, this solution does not heat the upper dynamic balance plate and the lower dynamic balance plate, and cannot solve the problem of damage to the upper dynamic balance plate and the lower dynamic balance plate caused when the rotor shaft passes through the upper dynamic balance plate and the lower dynamic balance plate. At the same time, this solution does not perform a cooling treatment on the rotor shaft, and does not fully utilize the effect of thermal expansion and contraction to optimize the assembly effect.

[0005] For the cooling of the rotor shaft, the traditional method is to completely immerse the rotor shaft in liquid nitrogen for cooling. However, the contact between the rotor shaft and liquid nitrogen will generate a cold shock, resulting in the rapid cooling of the rotor shaft, making the rotor shaft prone to cracking and causing unnecessary losses. At the same time, problems such as frosting and slipping on the surface of the cooled rotor shaft, which cause the rotor shaft to fall off from the jaw and cause damage, also urgently need to be solved. Summary of the Invention

[0006] The purpose of the present invention is to solve the above technical problems, and provide an integral press-fitting mechanism and stacking system for an asynchronous motor.

[0007] The present invention is realized through the following technical solutions:

[0008] The integral press-fitting mechanism for an asynchronous motor includes a frame. Characteristically, it further includes a downward pressing mechanism that can generate linear motion;

[0009] A press-fitting mechanism is arranged below the downward pressing mechanism and can be driven by the downward pressing mechanism to move up and down;

[0010] A pressing mechanism is arranged below the press-fitting mechanism and can move up and down through a cylinder;

[0011] A supporting mechanism is fixedly arranged below the pressing mechanism and is used to support the rotor core and the upper dynamic balance plate;

[0012] A locking mechanism is arranged between the pressing mechanism and the supporting mechanism and is used to wedge the pressing mechanism, apply a downward pressure to the pressing mechanism, so that the pressing mechanism applies pressure to the rotor core, the upper dynamic balance plate, and the lower dynamic balance plate on the supporting mechanism;

[0013] A positioning mechanism can make the upper dynamic balance plate and the rotor core maintain coaxiality through the principle of tensioning;

[0014] A lifting mechanism is connected to the positioning mechanism and drives the positioning mechanism to move up and down, so that the positioning mechanism passes through above the supporting mechanism.

[0015] Preferably, the downward pressing mechanism is driven by a servo motor I, and the servo motor I drives a pressing shaft to move up and down.

[0016] Preferably, the press-fitting mechanism includes a press head connecting shaft, an adjustment plate, a press head, and limit shafts arranged on both sides of the press head. The press head connecting shaft matches the pressing shaft, and the press head connecting shaft, the adjustment plate, the press head, and the limit shafts are integrally connected.

[0017] Preferably, the pressing mechanism includes a mounting seat. On the surface of the mounting seat, two positioning blocks driven by a cylinder to open and close are symmetrically arranged. After the positioning blocks are combined, a cylindrical through hole is formed in the middle.

[0018] Preferably, two limit blocks corresponding to the positions of the limit shafts are further arranged on the surface of the pressing mechanism, and the limit blocks are driven by a cylinder to translate.

[0019] Preferably, the supporting mechanism includes a positioning component and a wedge-shaped component. The supporting mechanism includes a mounting plate and a positioning seat arranged in the middle of the mounting plate. A circular through hole with the same aperture as the through hole on the positioning block is arranged in the center of the positioning seat.

[0020] Preferably, the locking mechanism includes clamping blocks fixedly arranged at both ends of the bottom of the pressing mechanism, and a wedge-shaped component arranged on the surface of the supporting mechanism corresponding to the positions of the clamping blocks. A through hole is arranged in the middle of the clamping block. The wedge-shaped component includes a locking cylinder, a wedge block, a spring and a wedge-shaped groove. The shape and volume of the wedge-shaped groove match the shape and volume of the clamping block.

[0021] Preferably, the positioning mechanism includes a positioning pin, an inner support taper shaft, an expansion sleeve, a fixed seat and an inner support mechanism cylinder which are coaxially arranged from top to bottom. The inner support mechanism cylinder controls the opening and closing of the expansion sleeve.

[0022] Preferably, a driving motor II, a lead screw and a tensioning mechanism are arranged on the lifting mechanism. The driving motor II can drive the lead screw to move up and down, and drive the positioning mechanism to pass through above the supporting mechanism.

[0023] An asynchronous motor stacking system includes the asynchronous motor integral pressing mechanism as described above.

[0024] Preferably, the asynchronous motor stacking system further includes a liquid nitrogen cooling mechanism and a heating mechanism. The liquid nitrogen cooling mechanism is used to cool the rotor shaft, and the heating mechanism is used to heat the rotor core and the dynamic balance plate.

[0025] Preferably, the liquid nitrogen cooling mechanism includes a freezing chamber with a loading and unloading opening. A rotor shaft accommodating area is arranged in the freezing chamber. Cooling pipes are arranged around the rotor shaft accommodating area. Air outlet holes are evenly distributed on the inner side wall of the cooling pipes. The cooling pipes are communicated with a liquid nitrogen inlet and output gas-liquid two-phase nitrogen from the air outlet holes.

[0026] Preferably, the bottom of the rotor shaft accommodating area is connected to a cam indexer. The driving shaft of the cam indexer passes through the axis of the rotor shaft accommodating area and drives it to rotate.

[0027] Preferably, a plurality of accommodating grooves are arranged on the rotor shaft accommodating area. A fixed seat which matches the inner pipe diameter of the rotor shaft and is inserted into the inside of the rotor shaft is arranged in each accommodating groove. The loading and unloading opening is arranged corresponding to the axis of the fixed seat.

[0028] Preferably, a movable gripper is correspondingly arranged at the upper end of the loading and unloading opening. A tensioning mechanism which can be opened and closed is arranged at the top of the gripper. The tensioning mechanism can just enter the inside of the rotor shaft through the opening of the rotor shaft in the closed state.

[0029] Preferably, the heating mechanism includes a rotor heating mechanism, a dynamic balance plate heating mechanism and a temperature measuring sensor mechanism. Heating coils made of copper pipes are arranged in the rotor heating mechanism and the dynamic balance plate heating mechanism. The heating coils are communicated with a chiller.

[0030] The beneficial effects of the present invention are embodied in:

[0031] 1. By means of the liquid nitrogen cooling mechanism, the diameter of the rotor shaft is reduced, and the heating mechanism heats the upper dynamic balance plate, the lower dynamic balance plate and the cast aluminum rotor core respectively. By making full use of the principle of thermal expansion and contraction, while minimizing the volume of the rotor shaft, the aperture diameters of the upper dynamic balance plate, the lower dynamic balance plate and the cast aluminum rotor core are increased, which is convenient for assembly.

[0032] 2. In the integral press-fitting mechanism of the asynchronous motor, the rotor shaft, the lower dynamic balance plate, the cast aluminum rotor and the upper dynamic balance plate are coaxially arranged, and the press-fitting can be carried out simultaneously, which greatly improves the press-fitting efficiency and ensures the concentricity of the four to the greatest extent, thereby improving the processing accuracy.

[0033] 3. The fixing mechanism in the liquid nitrogen cooling mechanism prevents the rotor shaft from being directly subjected to cold shock, avoids the generation of cracks in the rotor shaft, improves the qualified rate of the rotor shaft after freezing. At the same time, the annular cooling pipe is used to evenly spray out gas-liquid two-phase nitrogen, and the gas-liquid two-phase nitrogen is in a mist state, which not only cools the rotor shaft fully and evenly, but also greatly reduces the consumption of liquid nitrogen and the manufacturing cost.

[0034] 4. The rotary disk in the liquid nitrogen cooling mechanism is provided with multiple stations, which can not only ensure the simultaneous cooling of multiple rotor shafts to improve the efficiency, but also ensure that the rotor shafts have sufficient freezing time to reach the preset freezing temperature by extending the rotation time.

[0035] 5. The gripper for grasping the rotor shaft is tightly matched with the rotor shaft through the tensioning mechanism, which avoids the rotor shaft from slipping due to the small surface friction and improves the accuracy of part grasping.

[0036] 6. The rotor heating mechanism and the dynamic balance plate heating mechanism are used to heat the cast aluminum rotor core, the upper dynamic balance plate and the lower dynamic balance plate respectively, which meets the different heating requirements of parts with different materials, shapes and sizes, avoids the problems of insufficient heating or uneven heating of some parts, and at the same time avoids the damage problems caused by the direct assembly of the upper dynamic balance plate and the lower dynamic balance plate without heating.

[0037] 7. The setting of multiple temperature measuring mechanisms in the heating mechanism enables the workpiece to reach a suitable heating temperature and is not easily scrapped due to overheating or uneven heating. Brief Description of the Drawings

[0038] Figure 1 : It is the top view of the asynchronous motor stacking system in the present invention;

[0039] Figure 2 : It is the front view of the integral press-fitting mechanism of the asynchronous motor in the present invention;

[0040] Figure 3: It is the longitudinal sectional view of the locking mechanism in the integral press-fitting mechanism of the asynchronous motor of the present invention;

[0041] Figure 4 : It is the longitudinal sectional view of the positioning mechanism (with workpiece) in the integral press-fitting mechanism of the asynchronous motor of the present invention;

[0042] Figure 5 : It is the three-dimensional view of the positioning mechanism in the integral press-fitting mechanism of the asynchronous motor of the present invention;

[0043] Figure 6 : It is Figure 5 The enlarged schematic view of part A in

[0044] Figure 7 : It is the longitudinal sectional view of the top of the positioning mechanism in the integral press-fitting mechanism of the asynchronous motor of the present invention;

[0045] Figure 8 : It is the longitudinal sectional view of the positioning mechanism (without workpiece) in the integral press-fitting mechanism of the asynchronous motor of the present invention;

[0046] Figure 9 : It is the three-dimensional view of the liquid nitrogen cooling mechanism in the present invention;

[0047] Figure 10 : It is the schematic diagram of the internal structure of the liquid nitrogen cooling mechanism in the invention;

[0048] Figure 11 : It is the longitudinal sectional view of the liquid nitrogen cooling mechanism in the invention;

[0049] Figure 12 : It is the schematic diagram of the internal structure (without frame) of the heating mechanism in the invention;

[0050] Figure 13 : It is the top view of the internal structure of the heating mechanism in the present invention;

[0051] Figure 14 : It is the side view of part of the structure in the heating mechanism in the present invention;

[0052] Figure 15 : It is the schematic diagram of the moving mechanism in the heating mechanism in the present invention.

[0053] The markings in the figure are as follows:

[0054] 1: The overall press-fitting mechanism of the asynchronous motor 1, 11: The downward pressing mechanism, 111: Servo motor I, 112: Press shaft, 12: Press-fitting mechanism, 121: Press head connecting shaft, 122: Press head, 123: Limit shaft, 13: Clamping mechanism, 131: Positioning block, 132: Limit block, 14: Support mechanism, 141: Positioning seat, 142:, 15: Locking mechanism, 151: Clamping block, 152: Locking cylinder, 153: Wedge-shaped groove, 154: Wedge-shaped block, 16: Positioning mechanism, 161: Positioning shaft, 1610: Accommodating cavity, 1611: Concave part, 1612: Convex rod, 1613: First annular groove, 1614: First fastening screw, 1615: Insertion rod, 1616: Rod part, 1617: Insertion hole, 162: Inner support taper shaft, 1621: Head, 1622: Outer taper surface, 1623: Inner taper surface, 163: Expansion sleeve, 1630: First part, 1631: Second part, 1632: Connection surface, 1633: Second annular groove, 1634: Second fastening screw, 164: Fixed seat, 165: Driving cylinder, 166: Positioning pin;

[0055] 2: The liquid nitrogen cooling mechanism, 21: Freezing chamber, 23: Cooling pipe, 24: Liquid inlet, 25: Rotary disk, 26: Cam indexer, 27: Housing;

[0056] 3: Heating mechanism, 31: Intermediate frequency heater I 310: Heating base I, 311: Heating pin, 32: Intermediate frequency heater II, 33: Super audio frequency heater, 330: Heating table, 331: Heating base II, 34: Sensor I, 35: Sensor II, 351: Chain track, 36: Sensor III, 37: Mounting seat, 370: Slide rail, 371: Transfer cylinder, 372: Guided lifting cylinder, 38: Claw, 380: Clamping cylinder;

[0057] 4: Rotor core, 5: Rotor shaft, 6: Upper dynamic balance plate, 7: Lower dynamic balance plate, 8: Cleaning mechanism, 91: Rotor core loading rack, 92: Dynamic balance plate loading rack, 93: Rotor shaft loading rack, 100: Robot I, 200: Robot II. Specific implementation mode

[0058] In order to clearly and detailedly show the purpose, advantages and features of the present invention, it will be illustrated and explained through the non-restrictive description of the following preferred embodiments. This embodiment is only a typical example of applying the technical solution of the present invention, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

[0059] At the same time, it is stated that in the description of the solution, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "front", "back", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of description and simplification, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0060] In addition, the terms "first" and "second" in this solution are only used for descriptive purposes and cannot be understood as indicating or implying a ranking of importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0061] The following will describe the integral press-fitting mechanism 1 of the asynchronous motor and the stacking system in the present invention in detail with reference to the drawings and embodiments.

[0062] As Figures 2 to 4 shown, the integral press-fitting mechanism 1 of the asynchronous motor disclosed in the present invention includes a frame, the frame includes a base and a frame assembly, a downward pressing mechanism 11 fixed by a mounting seat is provided on the frame, the downward pressing mechanism 11 is driven by a servo motor I 111, the servo motor I 111 drives a pressing shaft 112 to move up and down, a press-fitting mechanism 12 and a pressing mechanism 13 are movably arranged below the downward pressing mechanism 11 through a slide rail, the press-fitting mechanism 12 is arranged below the downward pressing mechanism 11 and can be driven by the downward pressing mechanism 11 to lift and lower; the pressing mechanism 13 is arranged below the press-fitting mechanism 12 and can move up and down through a cylinder; a support mechanism 14 is fixedly arranged below the pressing mechanism 13 for supporting the rotor core 4 and the upper dynamic balance plate 6; a locking mechanism 15 is arranged between the pressing mechanism 13 and the support mechanism 14 for wedging the pressing mechanism 13 and applying a downward pressure to the pressing mechanism 13, so that the pressing mechanism 13 applies pressure to the rotor core 4, the upper dynamic balance plate 6 and the lower dynamic balance plate 7 on the support mechanism 14; the positioning mechanism 16 can maintain the coaxiality of the upper dynamic balance plate 6 and the rotor core 4 through the tensioning principle; the lifting mechanism is connected to the positioning mechanism 16 and drives the positioning mechanism 16 to lift and lower, so that the positioning mechanism 16 passes above the support mechanism 14.

[0063] As Figure 2As shown, the press-fitting mechanism 12 includes a press head connecting shaft 121, an adjustment plate, and a press head 122. The press head connecting shaft 121 matches the press shaft 112. The press head connecting shaft 121, the adjustment plate, and the press head 122 are integrally connected. When the press shaft 112 descends and abuts against the press head connecting shaft 121, the continued descent of the press shaft 112 will drive the press head connecting shaft 121 and the press head 122 to descend simultaneously.

[0064] As Figure 2 shown, the clamping mechanism 13 includes a mounting base. On the surface of the mounting base, two positioning blocks 131 driven by a cylinder to open and close are symmetrically arranged. After the positioning blocks 131 are combined, a cylindrical through hole is formed in the middle. The diameter of this through hole is equivalent to the diameter of the rotor shaft 5, enabling the rotor shaft 5 to just pass through the through hole.

[0065] Specifically, a clamping component is arranged between the press-fitting mechanism 12 and the clamping mechanism 13. The clamping component includes limiting shafts 123 symmetrically arranged at both ends of the bottom of the press-fitting mechanism 12. The height of the limiting shafts 123 is greater than the height of the press head 122. In this embodiment, the height difference between the limiting shafts 123 and the press head 122 is the same as the height of the rotor core 4. The clamping component further includes a limiting block 132 arranged on the surface of the clamping mechanism 13 and corresponding to the position of the limiting shafts 123, which is in a two-stage stepped shape. The height difference between the higher end and the lower end of the limiting block 132 is equivalent to the height of the rotor core 4. A limiting cylinder is fixedly connected to the outside of the higher end of the limiting block 132. In the first state, the limiting cylinder extends, pushing the limiting block 132 to move inward. After the press-fitting mechanism 12 descends, the limiting shafts 123 abut against the higher end of the limiting block 132. When the rotor shaft 5 is placed on the positioning blocks 131, the press head 122 just touches the top of the rotor shaft 5. In the second state, the limiting cylinder retracts, driving the limiting block 132 to move back. At this time, the press-fitting mechanism 12 descends, the limiting shafts 123 abut against the lower end of the limiting block 132, and the press head 122 descends compared to the first state, pushing the rotor shaft 5 to move downward.

[0066] As Figure 2 shown, the support mechanism 14 includes a mounting plate, adjustment blocks arranged around the mounting plate for adjusting the position of the mounting base, and a positioning seat 141 arranged in the middle of the mounting plate. A cylindrical mounting platform 142 protrudes from the center of the positioning seat 141, and a circular through hole with the same aperture as the through hole on the positioning block 131 is arranged in the center of the cylindrical mounting platform 142, making the cross-section of the cylindrical mounting platform 142 in a circular ring shape. The shape and area of this circular ring cross-section are the same as the shape and area of the upper dynamic balance plate 6, and at the same time, the iron core 4 can be stably fixed on the cylindrical mounting platform 142.

[0067] Further, as Figures 2 to 3As shown, a locking mechanism 15 is provided between the pressing mechanism 13 and the supporting mechanism 14. The locking mechanism 15 is used to wedge the pressing mechanism 13 and apply a downward pressure to the pressing mechanism 13, so that the pressing mechanism 13 applies pressure to the rotor core 4, the upper dynamic balance plate 6 and the lower dynamic balance plate 7 on the supporting mechanism 14. The locking mechanism 15 includes clamping blocks 151 symmetrically arranged at both ends of the bottom of the pressing mechanism 13, and a wedge-shaped hole is provided in the middle of the clamping block 151. The locking mechanism 15 further includes a wedge-shaped component arranged on the surface of the supporting mechanism 14. The wedge-shaped component is sequentially provided with a locking cylinder 152, a wedge-shaped block 154, a spring and a wedge-shaped groove 153. The shape and volume of the wedge-shaped groove 153 match the shape and volume of the clamping block 151, and the position of the wedge-shaped groove 153 corresponds to the position of the clamping block 151. The shape and volume of the wedge-shaped hole match the shape and volume of the wedge-shaped block 154, and when the clamping block 151 is completely embedded in the wedge-shaped groove 153, the wedge-shaped block 154 can just pass through the wedge-shaped hole. In the first state, the pressing mechanism 13 descends, the clamping block 151 enters the inside of the wedge-shaped groove 153, the locking cylinder 152 extends to push the wedge-shaped block 154 through the wedge-shaped hole on the clamping block 151, and the pressing mechanism 13 is locked. In the second state, the cylinder retracts to drive the wedge-shaped block 154 to return to its original position, the pressing mechanism 13 rises, and the clamping block 151 leaves the wedge-shaped groove 153.

[0068] As Figure 2 , Figure 4 and Figure 8 shown, a driving motor II and a lead screw 172 are provided on the lifting mechanism. The driving motor II can drive the lead screw 172 to move up and down. A positioning mechanism 16 is provided at the top of the lifting mechanism. The positioning mechanism 16 includes a tensioning sleeve 163 that can be controlled to open and close by a cylinder. The driving motor II on the lifting mechanism drives the positioning mechanism 16 to pass through the through hole in the middle of the supporting mechanism 14. The part of the positioning mechanism 16 passing through the supporting mechanism 14 is used to fix the upper dynamic balance plate and the iron core 4.

[0069] Specifically, as Figure 2 , Figures 4 to 8As shown in the figure, the positioning mechanism 16 includes a positioning shaft 161, an inner support cone shaft 162, a tension sleeve 163, a fixed seat 164, and a driving cylinder 165 that are coaxially arranged from top to bottom. The positioning shaft 161 has a positioning pin 166 for positioning inside, and the positioning shaft 161 and the positioning pin 166 form the first positioning mechanism 16. The tension sleeve 163 is arranged between the inner support cone shaft 162 and the fixed seat 164 and sleeved on the inner support cone shaft 162. The driving cylinder 165 drives the inner support cone shaft 162 to move downward to squeeze the tension sleeve 163, so that the outer diameter of the tension sleeve 163 expands outward for positioning. The inner support cone shaft 162, the tension sleeve 163, and the driving cylinder 165 form the second positioning mechanism 16. And the inner support cone shaft 162 is fixedly connected to the positioning shaft 161, so that the first positioning mechanism 16 and the second positioning mechanism 16 perform positioning synchronously.

[0070] Specifically, as Figure 5 shown in the figure, the top of the positioning shaft 161 has an opening, and a hollow accommodation cavity 1610 extends from the opening into its interior. The positioning pin 166 is arranged at the axis of the accommodation cavity 1610. In this embodiment, the positioning pin 166 is used to position the rotor shaft 5, and the top of the positioning pin 166 is conical to facilitate insertion into the interior of the rotor shaft 5.

[0071] Furthermore, as Figure 7 shown in the figure, in order to reduce the hard contact between the rotor shaft 5 and the positioning pin 166, the accommodation cavity 1610 is T-shaped, and there is a concave portion 1611 at the axis of its cavity bottom. The bottom of the positioning pin 166 has a convex rod 1612 that matches the concave portion 1611. The convex rod 1612 is inserted into the concave portion 1611, and a spring is arranged between the convex rod 1612 and the concave portion 1611. The two ends of the spring are respectively abutted against the convex rod 1613 and the concave portion 1611. The spring mainly plays a role in shock absorption and buffering to reduce the wear of the rotor shaft 5. In other feasible embodiments, the spring can be replaced by other elastic members with shock absorption effects.

[0072] As Figures 7 to 8 shown in the figure, the bottom of the positioning shaft 161 in the present invention has an insertion rod 1615 extending outward from its axis. The inner support cone shaft 162 is T-shaped, its head 1621 abuts against the positioning shaft 161, its rod portion 1616 is arranged inside the fixed seat 164 and connected to the driving cylinder 165. There is a jack 1617 extending downward from the top at the axis of the head 1621, and the insertion rod 1615 is fixedly arranged in the jack 1617 to realize the connection and fixation between the inner support cone shaft 162 and the positioning shaft 161.

[0073] Specifically, a first annular groove 1613 is provided along the outer wall of the bottom of the inserting rod 1615. A group of through holes communicating with the jack 1617 are annularly and evenly distributed along the side wall of the rod part 1616 of the inner support tapered shaft 162. The first fastening screw 1614 passes through the through hole and abuts against the first annular groove 1613 to fasten the positioning shaft 161 and the inner support tapered shaft 162 together. Since the inner support tapered shaft 162 is arranged inside the fixed seat 164, the annular structure of the first annular groove 1613 has a larger tolerance rate compared with other hole-shaped structures, which can ensure the solid connection between the first fastening screw 1614 and the first annular groove 1613.

[0074] Similarly, the outer wall of the expansion sleeve 163 also has a second annular groove 1633, and the outer wall of the fixed seat 164 has a perforation. The second fastening screw 1634 passes through the perforation and abuts against the second annular groove 1633 to fasten the expansion sleeve 163 and the fixed seat 164 together.

[0075] As Figures 5 to 6 shown, in order to facilitate the installation of the first fastening screw 1614, a group of waist-shaped holes are evenly distributed on the side wall of the fixed seat 164. The waist-shaped holes are vertically arranged, and the length thereof is not less than the moving distance of the inner support tapered shaft 162.

[0076] As Figures 7 to 8 shown, the expansion sleeve 163 includes a first part 1630 and a second part 1631 which are connected. There is an interface surface 1632 between the first part 1630 and the second part 1631. The first part 1630 is in sliding contact with the head 1621, and strip-shaped gaps extending downward from its opening are evenly distributed on the side wall of the first part 1630. The diameter of the second part 1631 is smaller than that of the first part 1630. The second part 1631 is embedded inside the fixed seat 164 and is fixedly connected to the fixed seat 164 by the second fastening screw 1634. The expansion sleeve 163 is made of 65Mn spring steel. The setting of the gaps enables the first part 1630 to have an expansion space and makes it have a tension to expand outward. When the head 1621 presses the first part 1630 downward, the side wall of the first part 1630 will expand outward against the head 1621 to achieve the purpose of expanding its outer diameter, so that the lower dynamic balance plate arranged outside the expansion sleeve 163 is tightly attached to the outer wall of the first part 1630 to realize the positioning function of the lower dynamic balance plate.

[0077] Further, the head 1621 has an outer conical surface 1622 with a diameter gradually decreasing from top to bottom. The inner wall of the first part 1630 has an inner conical surface 1623 that matches the outer conical surface 1622. The outer conical surface 1622 and the inner conical surface 1623 are in contact. The outer conical surface 1622 moves downward along the inner conical surface 1623 to expand the first part 1630 and increase the outer diameter of the first part 1630. In this preferred embodiment, the inclination of the outer conical surface 1622 and the inner conical surface 1623 is preferably 10°. As Figure 1 shown, for the tightened state of the tightening sleeve 163, the head 1621 squeezes the first part 1630 downward as much as possible, causing its side wall to expand outward; as Figure 1 shown, for the loosened state of the tightening sleeve 163, the head 1621 is as far away from the first part 1630 as possible, reducing the extrusion on the first part 1630.

[0078] As Figure 8 shown, the fixed seat 164 has a bottom plate. A set of support rods are fixedly provided at the bottom of the bottom plate. The support rods are mounted on the drive cylinder 165. The lead screw 172 extends into the interior of the fixed seat 164 and is fixedly connected to the inner support cone shaft 162. The bottom plate can improve the stability of the fixed seat 164 and reduce the possibility of its shaking. In this preferred embodiment, the outer diameters of the fixed seat 164 and the positioning shaft 161 are the same. In other feasible embodiments, the outer diameter of the fixed seat 164 can also gradually increase from top to bottom.

[0079] Further, a limit nut is sleeved on the lead screw 172. The limit nut is located between the bottom plate and the drive cylinder 165 and limits the movement range of the lead screw 172 to prevent excessive displacement of the lead screw 172 from causing excessive extrusion of the expansion sleeve and damaging the lower dynamic balance plate.

[0080] Further, as Figure 2 shown, the operating principles and specific structures of the drive motor I and the drive motor II are similar to those of the Chinese patent with the application number 201910534907.9, and will not be elaborated here.

[0081] In the specific implementation process, the specific operation process of the asynchronous motor integral press-fitting mechanism 1 is as follows:

[0082] First, the drive motor II in the lifting mechanism drives the positioning mechanism 16 to lift through the lead screw 172, so that the positioning mechanism 16 passes through the through hole provided on the support mechanism 14. At the same time, the tightening sleeve 163 provided on the positioning mechanism 16 is controlled to open by the cylinder. The robot I 100 passes the upper dynamic balance plate, the iron core 4, and the lower dynamic balance plate through the top of the positioning mechanism 16 in sequence and fixes them with the tightening sleeve 163;

[0083] Secondly, the pressing mechanism 13 is driven by a cylinder to descend to a position flush with the rotor core 4. At this time, the two positioning blocks 131 on the surface of the pressing mechanism 13 are driven by the cylinder to merge, and the rotor shaft 5 is fixedly placed in the through hole in the middle of the positioning blocks 131. The driving motor I drives the press-fitting mechanism 12 to descend. The limiting shaft 123 abuts against the higher end of the limiting block 132 and pushes the pressing mechanism 13 to press tightly against the rotor core 4, the upper dynamic balance plate 6, and the lower dynamic balance plate 7. At the same time, the clamping block 151 is embedded in the wedge-shaped groove 153, and the locking mechanism 15 locks the pressing mechanism 13 and the supporting mechanism 14 under the action of the cylinder;

[0084] Furthermore, the expansion sleeve is retracted and reset under the action of the cylinder. At the same time, the limiting block 132 is also driven by the cylinder to make its lower end correspond to the limiting shaft 123;

[0085] Then, the driving motor I continues to push the press head connecting shaft 121 and the press head 122 to descend through the pressing shaft 112. The limiting shaft 123 abuts against the lower end of the limiting block 132. The press head 122 pushes the rotor shaft 5 to pass through the central holes of the rotor core 4 and the lower dynamic balance plate. At the same time, the driving motor II drives the positioning mechanism 16 to descend and reset through the lead screw 172, so that the rotor shaft 5 finally passes through the upper dynamic balance plate;

[0086] Finally, the locking mechanism 15 is unlocked. The driving motor I drives the press-fitting mechanism 12 to lift and reset. The pressing mechanism 13 is driven by the cylinder to lift and reset. The robot I 100 takes away the workpiece after the press-fitting is completed.

[0087] As Figure 1 shown, the asynchronous motor stacking system includes an overall asynchronous motor press-fitting mechanism 1, and also includes a liquid nitrogen cooling mechanism 2 and / or a heating mechanism. That is, the asynchronous motor stacking system can be composed of the overall asynchronous motor press-fitting mechanism 1 alone, or composed of the overall asynchronous motor press-fitting mechanism 1 and the liquid nitrogen cooling mechanism 2, or can be composed of the overall asynchronous motor press-fitting mechanism 1 and the heating mechanism. In this solution, the asynchronous motor stacking system is preferably composed of the overall asynchronous motor press-fitting mechanism 1, the liquid nitrogen cooling mechanism 2, and the heating mechanism together. The liquid nitrogen cooling mechanism 2 is used to cool the rotor shaft 5, and the heating mechanism is used to heat the rotor core 4 and the dynamic balance plate.

[0088] Furthermore, as Figure 1 shown, the asynchronous motor stacking system further includes a cleaning mechanism 8, a rotor core loading rack 91, a dynamic balance plate loading rack 92, and a rotor shaft loading rack 93. The rotor core loading rack 91, the dynamic balance plate loading rack 92, and the rotor shaft loading rack 93 are respectively used to place the rotor core, the dynamic balance plate, and the rotor shaft to be assembled. The cleaning mechanism 8 is used to clean the workpiece before press-fitting.

[0089] As shown Figures 9 - 11 in the figure, the liquid nitrogen cooling mechanism 2 is used to freeze the rotor shaft 5, and includes a freezing chamber 21 having a loading and unloading opening. A rotatable rotor shaft accommodating area is provided in the freezing chamber 21 for fixing the rotor shaft 5. An annular cooling pipe 23 is arranged along the outer contour above the rotor shaft accommodating area. Air outlet holes are evenly distributed on the inner side wall of the cooling pipe 23. The cooling pipe 23 is communicated with a liquid nitrogen inlet 24, and gas-liquid two-phase nitrogen is output from the air outlet holes to freeze the rotor shaft 5.

[0090] In the present invention, gas-liquid two-phase nitrogen is used to freeze the rotor shaft 5. The gas-liquid two-phase nitrogen is in a mist state. Compared with the way that liquid nitrogen directly contacts the rotor shaft 5, the cooling and freezing method of the gas-liquid two-phase nitrogen contacting the rotor shaft 5 is more gentle, which can effectively reduce the cold shock received by the rotor shaft 5, avoid cracks in the rotor shaft 5 caused by a large cold shock, greatly improve the qualified rate of the rotor shaft 5 after freezing, and reduce unnecessary losses. On the other hand, the gas-liquid two-phase nitrogen will greatly reduce the consumption of nitrogen, save the amount of nitrogen used, and reduce the manufacturing cost of the freezing link.

[0091] Specifically, as shown Figure 10 in the figure, due to the principle that cold air sinks, the cooling pipe 23 is arranged above the rotor shaft accommodating area so that the gas-liquid two-phase nitrogen ejected from the air outlet holes can fully contact the rotor shaft 5. And the cooling pipe 23 is annular, and the air outlet holes are evenly distributed on the inner side of the cooling pipe 23, so that the gas-liquid two-phase nitrogen ejected from the air outlet holes contacts the rotor shaft 5 in all directions, avoiding the occurrence of uneven freezing.

[0092] Specifically, as shown Figure 10 and Figure 11As shown, the rotor shaft accommodating area includes a rotating disk 25 and a cam indexer 26. The drive shaft of the cam indexer 26 passes through the center of the rotating disk 25 and drives it to rotate. The rotating disk 25 is coaxially arranged in the freezing chamber 21, and the drive shaft penetrates through the center of the freezing chamber 21. The cam indexer 26 drives the rotating disk 25 to perform intermittent rotation at the same time interval to accurately control the time for the rotating disk 25 to rotate one week, ensuring that the time for the rotating disk 25 to rotate one week is not less than the shortest freezing time of the rotor shaft 5. In this preferred embodiment, the time for the rotating disk 25 to rotate one week is equal to the freezing time required for the rotor shaft 5, that is, the rotor shaft 5 is placed on the rotating disk 25 from the loading and unloading port for freezing. When the rotating disk 25 rotates one week and the rotor shaft 5 returns to below the loading and unloading port again, the rotor shaft 5 has been frozen and can be taken out from the loading and unloading port. Such a setting can maximize the rotation efficiency of the rotating disk 25. In this preferred embodiment, the time for the rotating disk 25 to rotate one week is 30 minutes. In other feasible embodiments, the rotation time of the rotating disk 25 can be specifically set according to the diameter of the rotating disk 25.

[0093] In this solution, the loading and unloading port is fixed, so that the rotor shaft 5 rotates relative to the loading and unloading port to extend the freezing time of the rotor shaft 5; in other solutions, the rotor shaft 5 can be fixed so that the loading and unloading port rotates relative to the rotor shaft 5. In another feasible solution, both the rotor shaft 5 and the loading and unloading port can be fixed, and multiple loading and unloading ports can be set to take out the rotor shaft 5.

[0094] As Figure 10 , Figure 11 As shown, in order to fix the rotor shaft 5, a group of accommodating grooves are evenly distributed along the edge of the rotating disk 25. The outer diameter of the accommodating groove matches the inner pipe diameter of the rotor shaft 5 and is inserted into the inside of the rotor shaft 5. Further, the diameter of the accommodating groove gradually decreases from bottom to top to form a cone shape. Such a structural setting enables the accommodating groove to be quickly inserted into the inside of the rotor shaft 5. The accommodating groove and the rotor shaft 5 are fixed to each other in a plug-in form, which can facilitate the grasping and placement of the rotor shaft 5 and improve the efficiency. Of course, in other feasible embodiments, other mechanisms can also be provided on the rotating disk 25 to fix the rotor shaft 5.

[0095] As Figure 9As shown in the figure, in order to improve the automation of the present invention, the rotor shaft 5 is grasped and placed by the gripper 28. To facilitate the operation of the gripper 28, the loading and unloading port is arranged corresponding to the axis of the accommodating groove. Such a structural arrangement enables the gripper 28 to vertically move up and down to complete the grasping and placing of the rotor shaft 5, greatly improving the efficiency of grasping and placing the rotor shaft 5. At the same time, setting only one loading and unloading port can ensure the sealing of the freezing chamber 21 and reduce the leakage of nitrogen.

[0096] In order to ensure that the temperature of the rotor shaft 5 reaches the preset freezing temperature when it is repositioned under the loading and unloading port after rotating one week, an array of temperature sensors (not shown in the figure) is arranged in the freezing chamber 21. The temperature sensors extend downward from the loading and unloading port to detect the temperature of the rotor shaft 5 directly opposite the loading and unloading port. The array of temperature sensors is arranged according to the temperature difference between different heights in the vertical direction to ensure that the overall temperature of the rotor shaft 5 reaches the preset temperature, improving the accuracy of temperature detection of the rotor shaft 5 and avoiding uneven freezing of the taken-out rotor shaft 5.

[0097] As Figure 12 shown in the figure, in order to further heat-insulate the freezing chamber 21, a housing 27 matching its outer contour is arranged outside the freezing chamber 21, and there is a vacuum gap between the housing 27 and the freezing chamber 21. The setting of the vacuum gap enables the temperature in the freezing chamber 21 to be kept constant, reduces energy loss, and further reduces the consumption of nitrogen.

[0098] As Figure 12 shown in the figure, the heating mechanism includes a frame. The frame includes a base, columns, guide rails, and a protection component. Side doors that can be controlled to open and close by cylinders are arranged on both sides of the protection component. A heating mechanism 3 is arranged on the frame. The heating mechanism 3 includes a rotor heating mechanism and a dynamic balance plate heating mechanism. A moving mechanism is movably arranged on the guide rails. The moving mechanism moves up and down above the rotor heating mechanism through the guide rails. The moving mechanism includes a mounting seat 37 that can be translated by a cylinder and a clamping jaw 38 that is openably and closably arranged on the mounting seat 37. The partition component heating system further includes a temperature measuring mechanism. The temperature measuring mechanism includes a first temperature measuring component and a second temperature measuring component that are movably arranged above the rotor heating mechanism and the dynamic balance plate heating mechanism.

[0099] As Figures 12 to 14As shown, the rotor heating mechanism includes medium-frequency heaters I 31 and medium-frequency heaters II 32 which are symmetrically arranged. The medium-frequency heaters I 31 and medium-frequency heaters II 32 include heating bases I 310, heating pins 311 and heating coils. The dynamic balance plate heating mechanism consists of at least two symmetrically arranged ultra-audio-frequency heaters 33. In this solution, four ultra-audio-frequency heaters 33 are provided. The ultra-audio-frequency heaters 33 include heating bases II 331 and heating platforms 330. A protruding cylinder is provided at the axis center of the heating platform 330. A heating coil is arranged inside the heating platform 330. The heating coil is made of a hollow copper pipe. The copper pipes of the heating coils in the rotor heating mechanism and the copper pipes of the heating coils in the dynamic balance plate heating mechanism are respectively connected to a large water chiller and a small water chiller. For the cooling method of the heating coil, the connection method between the heating coil and the water chiller, and the water conveyance method, please refer to the Chinese patents with patent application numbers: 201320069698.3 and 201320069698.3 respectively.

[0100] Further, as Figure 12 , Figure 15 shown, the moving mechanism includes a mounting seat 37, a heating rotor guiding lifting cylinder 372 for driving the mounting seat 37 to move up and down, a gripper 38 which is openable and closable and arranged on the mounting seat 37, a transfer cylinder 371 for driving the gripper 38 to translate in the Z-axis direction, and clamping cylinders 380 arranged on both sides of the gripper 38 and used for controlling the opening and closing of the gripper 38. A slide rail 370 is further arranged on the surface of the mounting seat 37. The gripper 38 is controlled by the transfer cylinder 371 to move in the Z-axis direction on the slide rail 370. The number of the moving mechanisms is the same as the number of the medium-frequency heaters. In this solution, since the medium-frequency heaters I 31 and medium-frequency heaters II 32 are symmetrically arranged in the partition component heating system, a moving mechanism I and a moving mechanism II are respectively correspondingly arranged directly above the medium-frequency heaters I 31 and medium-frequency heaters II 32.

[0101] As Figure 12 , Figure 14 shown, the first temperature measuring component includes at least one sensor I 34 (preferably two in this solution to prevent damage or measurement error of one of the sensors). The sensor I 34 is fixed by a fixing block and driven by a cylinder to move up and down on the mounting seat 37. The second temperature measuring component includes a chain track 351 and at least two sensors II 35 which move up and down above the dynamic balance plate heating mechanism through the chain track 351. The sensors II 35 are driven by cylinders to move. The second temperature measuring component further includes a temperature measuring frame fixedly arranged at one end of the heating platform 330 and a sensor III 36 which is arranged at the top of the temperature measuring frame in a liftable manner. At least one sensor III 36 is arranged near each heating platform 330, and preferably two in this solution.

[0102] Further, a control panel (not shown in the figure) is provided on the frame. The control panel is connected to the frame through a rocker locking assembly. A position locking mechanism is provided on the rocker locking assembly, which can detect the passing of the robot and actively avoid it. The control panel is electrically connected to the chiller, the heating mechanism 3, the temperature measuring mechanism, and the side door.

[0103] In the specific implementation process, the working process of the zoning component heating system in this solution is as follows:

[0104] First, start the heating system. The guiding lifting cylinder 372 controls the side door to open. The mounting seat 37 on the transfer mechanism I is controlled to descend by the heating rotor guiding lifting cylinder 372. At the same time, the transfer cylinder 371 drives the clamping jaw 38 to extend out of the mounting seat 37 along the slide rail 370. At this time, the clamping jaw 38 is in a closed state (that is, just in a state where it can fix the rotor core 4).

[0105] Secondly, the rocker locking assembly detects the robot and rotates the control panel to other directions. The robot I 100 enters through the side door entrance, transports the rotor core 4 to the clamping jaw 38, and then transports the upper dynamic balance plate 6 and the lower dynamic balance plate 7 to different heating platforms 330 respectively and then leaves. The side door closes.

[0106] Then, the ultra-audio frequency heater 33 starts to heat. At this time, the clamping jaw 38 moves to the intermediate frequency heater I 31 and places the rotor core 4 on the heating base I 310. The heating pin 311 passes through the inside of the core 4. After determining the position, the clamping jaw 38 opens and returns to its original position at the same time. The intermediate frequency heater I 31 starts to heat.

[0107] After heating for a certain period of time (the heating time of the intermediate frequency heater I 31 is preferably 50 minutes), the clamping jaw 38 descends to the position where the core 4 is located and closes. After clamping the core 4, it rises to the sensor I 34 for temperature measurement. If the required temperature is reached, the clamping jaw 38 descends, the side door opens, the robot I 100 transports the core 4 to the clamping jaw 38 on the transfer mechanism II, the robot I 100 leaves, the side door closes, and the clamping jaw 38 repeats the previous actions of the clamping jaw 38 to place the core 4 on the intermediate frequency heater II 32 for the second heating; if the required temperature is not reached, continue to heat until the required temperature is reached and then transport the core 4 to the second clamping jaw 38 through the robot I 100.

[0108] Finally, after the core 4 undergoes the second heating, the side door opens. The robot I 100 enters through the side door entrance, scans the codes and takes away the core 4, the upper dynamic balance plate 6, and the lower dynamic balance plate 7 respectively, and the heating is completed.

[0109] In a preferred embodiment of the present invention, the asynchronous motor stacking system includes an overall press-fitting mechanism 1 for the asynchronous motor, a liquid nitrogen cooling mechanism 2 (for cooling the rotor shaft 5), and a heating mechanism (for heating the rotor core 4, the upper dynamic balance plate 6, and the lower dynamic balance plate 7). The specific operation process of the asynchronous motor stacking system in this solution is as follows:

[0110] In the first step, the robot I 100 takes out the rotor core 4 from the rotor core loading rack 91 and transports it to the cleaning mechanism 8 for cleaning;

[0111] In the second step, start the heating device, open the side door, extend the gripper in place. The robot I 100 takes out the rotor core 4, the upper dynamic balance plate 6, and the lower dynamic balance plate 7 from the cleaning mechanism 8 and the dynamic balance plate loading rack 92 respectively. The robot I 100 places the rotor core 4 on the gripper, places the dynamic balance plates on the heating table and then leaves. The gripper places the rotor core 4 on the intermediate frequency heater I and then returns. Close the side door to start heating;

[0112] In the third step, after the first heating stage is completed, open the side door again, extend the second gripper in place. The robot I 100 places the rotor core 4 on the second gripper and then leaves. The second gripper places the rotor core 4 on the intermediate frequency heater II and then returns. Close the side door for secondary heating;

[0113] In the fourth step, after heating is completed, the temperature is measured by the temperature measuring mechanism. Open both side doors. The robot I 100 takes out the rotor core 4, the upper dynamic balance plate 6, and the lower dynamic balance plate 7 and transports them to the overall press-fitting mechanism 1 for the asynchronous motor;

[0114] In the fifth step, start the overall press-fitting mechanism 1 for the asynchronous motor. The lifting mechanism 17 drives the positioning mechanism 16 to lift, so that the positioning mechanism 16 passes through the support mechanism 14. At the same time, the expansion sleeve 163 provided on the positioning mechanism 16 is controlled to open by the cylinder (this part can be carried out simultaneously with the first, second, and third steps). The robot I 100 passes the upper dynamic balance plate, the core 4, and the lower dynamic balance plate through the top of the positioning mechanism 16 in sequence, and is fixed by the expansion sleeve 163;

[0115] In the sixth step, the pressing mechanism 13 descends to a position flush with the rotor core 4, places the rotor shaft 5 fixedly in the through hole in the middle of the positioning block 131. The driving motor I drives the press-fitting mechanism 12 and the pressing mechanism 13 to descend, so that the rotor core 4, the upper dynamic balance plate 6, and the lower dynamic balance plate 7 are pressed tightly. The locking mechanism 15 locks the pressing mechanism 13 and the support mechanism 14, and the expansion sleeve contracts and resets;

[0116] Step 7: Start the liquid nitrogen cooling mechanism 2. The robot II 200 takes out the rotor shaft 5 from the rotor shaft loading rack 93 and places it through the pick-and-place opening in the rotor shaft accommodating area in the freezing chamber 21, and it is fixed by the accommodating groove. The cam indexer 26 rotates to start cooling the rotor shaft 5 (to keep the temperature of each workpiece within an appropriate range, this step can be carried out simultaneously with Steps 1 to 5).

[0117] Step 8: After the rotor shaft 5 is cooled, the rotor shaft 5 is taken out from the freezing chamber 21 by the gripper 28 and conveyed to the asynchronous motor integral press-fitting mechanism 1 by the robot II 200.

[0118] Step 9: The driving motor I continues to push the press head connecting shaft 121 and the press head 122 to descend through the press shaft 112. The limiting shaft 123 abuts against the lower end of the limiting block 132. The press head 122 pushes the rotor shaft 5 through the central holes of the rotor core 4 and the lower dynamic balance plate. At the same time, the driving motor II drives the positioning mechanism 16 to descend and reset through the lead screw 172, so that the rotor shaft 5 finally passes through the upper dynamic balance plate.

[0119] Step 10: The locking mechanism 15 is unlocked. The driving motor I drives the press-fitting mechanism 12 to lift and reset. The pressing mechanism 13 is driven by a cylinder to lift and reset. The robot I 100 takes away the workpiece after the press-fitting is completed.

[0120] There are still various implementation manners of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the protection scope of the present invention.

Claims

1. Asynchronous motor integral pressing mechanism, including a frame, characterized in that Further included are: A downward pressing mechanism (11), which can generate linear motion; A press-fitting mechanism (12), arranged below the downward pressing mechanism (11) and can be driven by the downward pressing mechanism (11) to move up and down; A pressing mechanism (13), arranged below the press-fitting mechanism (12) and can move up and down through a cylinder; A supporting mechanism (14), fixedly arranged below the pressing mechanism (13) for supporting the rotor core (4) and the upper dynamic balance plate (6); A locking mechanism (15), arranged between the pressing mechanism (13) and the supporting mechanism (14) for wedging the pressing mechanism (13), applying a downward pressure to the pressing mechanism (13), so that the pressing mechanism (13) applies pressure to the rotor core (4), the upper dynamic balance plate (6) and the lower dynamic balance plate (7) on the supporting mechanism (14); A positioning mechanism (16), which can maintain the coaxiality of the upper dynamic balance plate (6) and the rotor core (4) through the tensioning principle; A lifting mechanism (17), connected to the positioning mechanism (16) and driving the positioning mechanism (16) to move up and down, so that the positioning mechanism (16) passes through above the supporting mechanism (14); The positioning mechanism (16) includes a positioning shaft (161), an inner support taper shaft (162), a tensioning sleeve (163), a fixed seat (164) and a driving cylinder (165) arranged coaxially from top to bottom. The inside of the positioning shaft (161) has a positioning pin (166) for positioning, and the positioning shaft (161) and the positioning pin (166) form a first positioning mechanism; the tensioning sleeve (163) is arranged between the inner support taper shaft (162) and the fixed seat (164) and sleeved on the inner support taper shaft (162). The driving cylinder (165) drives the inner support taper shaft (162) to move downwards to squeeze the tensioning sleeve (163), so that the outer diameter of the tensioning sleeve (163) expands outwards for positioning. The inner support taper shaft (162), the tensioning sleeve (163) and the driving cylinder (165) form a second positioning mechanism; and the inner support taper shaft (162) is fixedly connected to the positioning shaft (161), so that the first positioning mechanism and the second positioning mechanism perform positioning synchronously; the top of the positioning shaft (161) has an opening, and a hollow accommodating cavity (1610) extends from the opening into its inside. The positioning pin (166) is arranged at the axis of the accommodating cavity (1610); the accommodating cavity (1610) is T-shaped, and there is a concave portion (1611) recessed inwards at the axis of its cavity bottom. The bottom of the positioning pin (166) has a convex rod (1612) matching the concave portion (1611). The convex rod (1612) is inserted into the concave portion (1611), and a spring is arranged between the convex rod (1612) and the concave portion (1611). The two ends of the spring are respectively abutted against the convex rod (1612) and the concave portion (1611).

2. The integral press-fitting mechanism for an asynchronous motor according to claim 1, characterized in that: The downward pressing mechanism (11) is driven by a servo motor I (111), and the servo motor I (111) drives a pressing shaft (112) to move up and down.

3. The integral press-fitting mechanism for an asynchronous motor according to claim 2, characterized in that: The press-fitting mechanism (12) includes a punch connecting shaft (121), an adjustment plate, a punch (122), and limit shafts (123) arranged on both sides of the punch (122). The punch connecting shaft (121) matches the press shaft (112), and the punch connecting shaft (121), adjustment plate, punch (122), and limit shafts (123) are integrally connected.

4. The integral press-fitting mechanism for an asynchronous motor according to claim 3, characterized in that: The clamping mechanism (13) includes a mounting frame. On the surface of the mounting frame, two positioning blocks (131) driven by a cylinder to open and close are symmetrically arranged. A cylindrical through-hole is formed in the middle after the positioning blocks (131) are combined.

5. The integral press-fitting mechanism for an asynchronous motor according to claim 4, characterized in that: On the surface of the clamping mechanism (13), two limit blocks (132) corresponding to the positions of the limit shafts (123) are also arranged, and the limit blocks (132) are driven to translate by a cylinder.

6. The integral press-fitting mechanism for the asynchronous motor according to claim 4, characterized in that: The support mechanism (14) includes a mounting plate and a positioning seat (141) arranged in the middle of the mounting plate. A circular through-hole with the same aperture as the through-hole on the positioning block (131) is arranged in the center of the positioning seat (141).

7. The integral press-fitting mechanism for an asynchronous motor according to claim 1, wherein the locking mechanism (15) includes clamping blocks (151) fixedly arranged at both ends of the bottom of the clamping mechanism (13), and a wedge-shaped component arranged on the surface of the support mechanism (14) corresponding to the positions of the clamping blocks (151). A through-hole is arranged in the middle of the clamping block (151). The wedge-shaped component includes a locking cylinder (152), a wedge block (154), a spring, and a wedge-shaped groove (153). The shape and volume of the wedge-shaped groove (153) match the shape and volume of the clamping block (151).

8. The integral pressing mechanism for the asynchronous motor according to claim 1, wherein: A driving motor II, a lead screw (172), and a tensioning mechanism are arranged on the lifting mechanism (17). The driving motor II can drive the lead screw (172) to move up and down, and drive the positioning mechanism (16) to pass through above the support mechanism (14).

9. Asynchronous motor stacking system, characterized in that: Includes the integral press-fitting mechanism (12) for an asynchronous motor according to any one of claims 1-8.

10. The asynchronous motor stacking system according to claim 9, characterized in that: The asynchronous motor stacking system further includes a liquid nitrogen cooling mechanism (2) and / or a heating mechanism (3). The liquid nitrogen cooling mechanism (2) is used to cool the rotor shaft 5, and the heating mechanism (3) is used to heat the rotor core (4) and the dynamic balance plate.

11. The asynchronous motor stacking system according to claim 10, characterized in that: The liquid nitrogen cooling mechanism (2) includes a freezing chamber (21) having a loading and unloading port (22). A rotor shaft accommodating area is arranged in the freezing chamber (21). Cooling pipes (23) are arranged around the rotor shaft accommodating area. Air outlet ports (231) are evenly distributed on the inner side wall of the cooling pipes (23). The cooling pipes (23) are communicated with a liquid nitrogen inlet (24), and gas-liquid two-phase nitrogen is output from the air outlet ports (231).

12. The asynchronous motor stacking system according to claim 11, characterized in that: The bottom of the rotor shaft accommodating area is connected to a cam indexer (26). The driving shaft (261) of the cam indexer (26) passes through the axis of the rotor shaft accommodating area and drives it to rotate.

13. The asynchronous motor stacking system according to claim 12, characterized in that: A plurality of accommodating grooves (251) are provided on the rotor shaft accommodating area, and a fixing seat (164) that matches the inner pipe diameter of the rotor shaft (5) and is inserted into the inside of the rotor shaft (5) is provided in each accommodating groove (251). The material loading and unloading port (22) is correspondingly arranged relative to the axis of the fixing seat (164).

14. The asynchronous motor stacking system according to claim 13, wherein: A movable gripper (28) is correspondingly arranged at the upper end of the material loading and unloading port (22). An expandable and contractible mechanism that can be opened and closed is arranged at the top of the gripper (28). In the closed state, the expandable and contractible mechanism can just enter the inside of the rotor shaft (5) through the opening of the rotor shaft (5).

15. The asynchronous motor stacking system according to claim 10, characterized in that: The heating mechanism (3) includes an intermediate frequency heating mechanism, an ultra-audio frequency heating mechanism, and a temperature measuring sensor mechanism. Heating coils made of copper tubes are arranged in the intermediate frequency heating mechanism and the ultra-audio frequency heating mechanism. The heating coils are communicated with a chiller.

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