A motor stator hot mounting apparatus

Abstract

The utility model discloses a motor stator hot jacket equipment relates to motor assembly technical field, including frame, first positioning fixture, conveying device, heating device, second positioning fixture and pressure equipment. Frame is equipped with heating station and pressure station, and the pressure station is located the front of heating station, first positioning fixture is used for positioning casing, conveying device is used for conveying first positioning fixture from back to front, heating device is used for heating casing on first positioning fixture at heating station, second positioning fixture is located on frame, and second positioning fixture is used for positioning stator, and pressure equipment is used for loading stator on second positioning fixture from top to bottom into casing on first positioning fixture at pressure station. The motor stator hot jacket equipment effectively solves the problem that present manual hot jacket assembly mode is complicated, and then is favorable for improving the hot jacket assembly efficiency of stator.

Description

Technical Field

[0001] This utility model relates to the field of motor assembly technology, and in particular to a motor stator heat fitting device. Background Technology

[0002] The assembly of the motor stator and housing relies on a thermoforming process, based on the principle of thermal expansion and contraction of metals. First, the motor housing is heated, causing its inner diameter to expand. Once the housing has expanded to the appropriate size, the stator is installed inside, completing the thermoforming assembly. Finally, as the housing cools, its inner diameter contracts, tightly gripping the stator to form a gapless, high-strength connection. Current thermoforming assembly methods largely rely on manual operation. Operators use a flame gun or small heating device to locally heat the inner wall and edges of the housing. During heating, the inner diameter of the housing is frequently measured with calipers to determine if it meets assembly requirements. Once the housing meets the dimensions, the operator moves the stator and installs it into the housing, completing the thermoforming assembly. This manual thermoforming assembly method is cumbersome and not conducive to improving the efficiency of stator thermoforming assembly. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a motor stator heat-shrinking device, which is beneficial to improving the efficiency of stator heat-shrinking assembly.

[0004] According to an embodiment of the present invention, a motor stator heat fitting device includes a frame with a heating station and a pressing station, the pressing station being located in front of the heating station; a first positioning fixture for positioning a housing; a conveying device for conveying the first positioning fixture from back to front, so that the first positioning fixture moves sequentially to the heating station and the pressing station; a heating device mounted on the frame for heating the housing on the first positioning fixture at the heating station; a second positioning fixture mounted on the frame for positioning the stator; and a pressing device mounted on the frame for inserting the stator on the second positioning fixture from top to bottom into the housing on the first positioning fixture at the pressing station.

[0005] It has at least the following beneficial effects: When hot assembly of the stator is required, the operator first places and positions the motor housing to be assembled on the first positioning fixture, and simultaneously places and positions the motor stator to be assembled on the second positioning fixture. Then, the conveyor starts, moving the first positioning fixture carrying the housing from back to front, so that the first positioning fixture and the housing move to the preset heating position on the frame. After the first positioning fixture and the housing reach the heating position, the conveyor stops, leaving the first positioning fixture and the housing at the heating position. At this time, the heating device on the frame starts working, heating the housing on the first positioning fixture at the heating position. The housing expands to the required temperature and temperature after heating. After the required dimensions for assembly are met, the conveying device starts and moves the first positioning fixture and the heated housing forward, so that the first positioning fixture and the heated housing move to the pressing station located in front of the heating station. After the first positioning fixture and the housing move to the pressing station, the conveying device stops running, so that the first positioning fixture and the housing stay at the pressing station. Then the pressing device starts and presses the stator, which is positioned on the second positioning fixture, from top to bottom into the housing on the first positioning fixture at the pressing station, completing the thermal assembly of the motor stator and the housing. Finally, the conveying device starts and transports the first positioning fixture and the thermally assembled housing and stator forward to the downstream equipment. The conveying device in this motor stator heat fitting equipment enables automatic transport of the housing between the heating station and the pressing station. The heating device in the motor stator heat fitting equipment replaces the local heating method of manual hand-held flame guns or small heating devices, and the pressing device in the motor stator heat fitting equipment replaces the assembly method of manually handling the stator. This greatly reduces the participation of humans in tedious processes such as heating, measurement, and handling, effectively solving the problem of cumbersome existing manual heat fitting assembly methods, and thus helping to improve the efficiency of stator heat fitting assembly.

[0006] According to an embodiment of the present invention, the motor stator heat fitting equipment further includes a first limiting cylinder. The cylinder body of the first limiting cylinder is disposed on the frame. The piston rod of the first limiting cylinder can extend above the conveying device and abut against the first positioning fixture, so that the first positioning fixture stays at the heating station.

[0007] According to an embodiment of the present invention, the motor stator heat fitting equipment further includes a second limiting cylinder. The cylinder body of the second limiting cylinder is disposed on the frame. The piston rod of the second limiting cylinder can extend above the conveying device and abut against the first positioning fixture, so that the first positioning fixture stays at the pressing station.

[0008] The motor stator heat-shrinking equipment according to an embodiment of the present utility model further includes a first lifting device. The heating device includes a heating coil and a power supply module. The heating coil is electrically connected to the power supply module. The power supply module is disposed on the frame and is used to supply power to the heating coil. The first lifting device is disposed on the frame and is used to push the first positioning fixture at the heating station upward so that the heating coil extends into the housing on the first positioning fixture.

[0009] According to the motor stator heat fitting equipment of this utility model embodiment, the first lifting device includes a first lifting cylinder and a first support plate. The cylinder body of the first lifting cylinder is connected to the frame, and the first support plate is connected to the piston rod of the first lifting cylinder. The first support plate is provided with a plurality of first guide posts, and the first positioning fixture is provided with a plurality of first guide holes. The first lifting cylinder can drive the first support plate to rise so that the plurality of first guide posts are respectively inserted into the plurality of first guide holes, and the first support plate lifts the first positioning fixture upward.

[0010] According to an embodiment of the present invention, the motor stator heat fitting equipment further includes a translation device and a second lifting device. Both the translation device and the second lifting device are mounted on the frame. The frame also has a centering station located above the pressing station. The translation device is used to drive the second positioning fixture to move in the left-right direction so that the second positioning fixture can move to or away from the centering station. The second lifting device is used to push the first positioning fixture at the pressing station upward so that the first positioning fixture can move to the centering station. The pressing device includes a lifting drive mechanism and a tensioning mechanism. The lifting drive mechanism is mounted on the frame and can drive the tensioning mechanism to descend to the centering station so that the tensioning mechanism extends into the stator on the second positioning fixture at the centering station and tensions the stator, or the tensioning mechanism installs the stator into the housing on the first positioning fixture at the centering station.

[0011] According to the embodiment of the present utility model, the motor stator heat fitting device includes a tensioning mechanism comprising a finger cylinder and a plurality of tensioning claws. The cylinder body of the finger cylinder is connected to the output end of the lifting drive mechanism. The finger cylinder has a center line, which coincides with the central axis of the upper housing of the first positioning fixture at the pressing station. The upper ends of the plurality of tensioning claws are respectively connected to the plurality of output ends of the finger cylinder. The plurality of tensioning claws are circumferentially distributed around the center line. The lower ends of the plurality of tensioning claws are used to extend into the stator. The finger cylinder can drive the plurality of tensioning claws to move away from each other, so that the lower ends of the plurality of tensioning claws can be pressed against the inner wall of the stator simultaneously, and the central axis of the stator coincides with the center line.

[0012] According to the motor stator heat fitting device of this utility model embodiment, the lower end of the clamping claw is provided with a fitting arc plate, and the lower end of the clamping claw abuts against the inner wall of the stator through the fitting arc plate.

[0013] According to the embodiment of the present invention, the motor stator heat fitting device includes a tensioning mechanism comprising at least three tensioning claws.

[0014] According to an embodiment of the present utility model, the motor stator heat fitting device further includes a mounting plate, which is connected to the output end of the lifting drive mechanism. The cylinder body of the finger cylinder is connected to the mounting plate. The mounting plate is provided with multiple positioning rods, which are distributed circumferentially around the center line. The lower ends of the multiple positioning rods are all located above the lower end of the clamping claw. The multiple positioning rods are respectively used to insert into multiple structural holes on the stator.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the motor stator heat-shrinking device according to an embodiment of this utility model; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 yes Figure 1 A magnified view of a section at point B in the middle; Figure 4 This is a schematic diagram of the heating device; Figure 5 This is a structural schematic diagram of the press-fitting device; Figure 6 This is a partial structural diagram of the press-fitting device; Icon labels: Conveying device 100; Heating device 200; heating coil 210; power supply module 220; Pressing device 300; lifting drive mechanism 310; tensioning mechanism 320; finger cylinder 321; tensioning claw 322; fitting arc plate 323; mounting plate 330; positioning rod 340; First lifting device 400; Second lifting device 500; Translation device 600; Frame 700; first positioning fixture 710; second positioning fixture 720; 10 housing; 20 stator. Detailed Implementation

[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] refer to Figures 1 to 3 This utility model discloses a motor stator heat fitting device, including a frame 700, a first positioning fixture 710, a conveying device 100, a heating device 200, a second positioning fixture 720, and a pressing device 300. The frame 700 is provided with a heating station and a pressing station, the pressing station being located in front of the heating station; a first positioning fixture 710 is used to position the housing 10; a conveying device 100 is used to convey the first positioning fixture 710 from back to front, so that the first positioning fixture 710 moves sequentially to the heating station and the pressing station; a heating device 200 is provided on the frame 700, the heating device 200 being used to heat the housing 10 on the first positioning fixture 710 at the heating station; a second positioning fixture 720 is provided on the frame 700, the second positioning fixture 720 being used to position the stator 20; a pressing device 300 is provided on the frame 700, the pressing device 300 being used to insert the stator 20 on the second positioning fixture 720 from top to bottom into the housing 10 on the first positioning fixture 710 at the pressing station.

[0021] Understandably, when the stator 20 needs to be heat-fitted, the operator first places and positions the motor housing 10 to be assembled on the first positioning fixture 710, and simultaneously places and positions the motor stator 20 to be assembled on the second positioning fixture 720. Then, the conveying device 100 starts, moving the first positioning fixture 710 carrying the housing 10 from back to front, so that the first positioning fixture 710 and the housing 10 first move to the preset heating position on the frame 700. After the first positioning fixture 710 and the housing 10 move to the heating position, the conveying device 100 stops, leaving the first positioning fixture 710 and the housing 10 at the heating position. At this time, the heating device 200 on the frame 700 starts working, heating the housing 10 on the first positioning fixture 710 at the heating position. Once the housing 10 is heated... After expanding to the required assembly dimensions, the conveying device 100 starts and moves the first positioning fixture 710 and the heated housing 10 forward, so that the first positioning fixture 710 and the heated housing 10 move to the pressing station located in front of the heating station. After the first positioning fixture 710 and the housing 10 move to the pressing station, the conveying device 100 stops, so that the first positioning fixture 710 and the housing 10 remain at the pressing station. Then, the pressing device 300 starts and presses the stator 20, which is positioned on the second positioning fixture 720, from top to bottom into the housing 10 on the first positioning fixture 710 at the pressing station, completing the thermal assembly of the motor stator 20 and the housing 10. Finally, the conveying device 100 starts and conveys the first positioning fixture 710 and the thermally assembled housing 10 and stator 20 forward to the downstream equipment. The conveying device 100 in the motor stator heat fitting equipment realizes the automatic conveying of the housing 10 between the heating station and the pressing station. The heating device 200 in the motor stator heat fitting equipment replaces the local heating method of manual hand-held flame gun or small heating equipment. The pressing device 300 in the motor stator heat fitting equipment replaces the assembly method of manually handling the stator 20. It greatly reduces the participation of manpower in tedious links such as heating, measurement and handling, effectively solves the problem of tedious existing manual heat fitting assembly methods, and thus helps to improve the heat fitting assembly efficiency of the stator 20.

[0022] In this embodiment of the invention, the first positioning fixture 710 is a tooling for precisely positioning and supporting the housing 10, and the second positioning fixture 720 is a tooling for precisely positioning and supporting the stator 20. The first positioning fixture 710 can adapt to the shape of the housing 10. After the operator places the housing 10 on the first positioning fixture 710, the first positioning fixture 710 can limit the radial movement and axial displacement of the housing 10, ensuring that the housing 10 can be accurately moved to the heating station and the pressing station. The second positioning fixture 720 can adapt to the shape of the stator 20. After the operator places the stator 20 on the second positioning fixture 720, the stator 20 will not shift relative to the second positioning fixture 720, ensuring a smooth pressing process. Both the first positioning fixture 710 and the second positioning fixture 720 are common tooling in the field of motor assembly, and will not be described further here.

[0023] In this embodiment of the invention, the motor stator heat-shrinking device further includes a first limiting cylinder (not shown in the figure). The cylinder body of the first limiting cylinder is mounted on the frame 700, and the piston rod of the first limiting cylinder can extend above the conveying device 100 and abut against the first positioning fixture 710, so that the first positioning fixture 710 stops at the heating position. The motor stator heat-shrinking device further includes a second limiting cylinder (not shown in the figure). The cylinder body of the second limiting cylinder is mounted on the frame 700, and the piston rod of the second limiting cylinder can extend above the conveying device 100 and abut against the first positioning fixture 710, so that the first positioning fixture 710 stops at the pressing position.

[0024] Understandably, after the operator places the housing 10 in the first positioning fixture 710 and the stator 20 in the second positioning fixture 720, the conveying device 100 moves the first positioning fixture 710 from back to front. When the first positioning fixture 710 approaches the heating station, the piston rod of the first limiting cylinder extends above the conveying device 100 and abuts against the first positioning fixture 710 to prevent it from moving forward, thus ensuring that the first positioning fixture 710 is precisely positioned at the heating station. At this time, the heating device 200 heats the housing 10. After heating is completed, the piston rod of the first limiting cylinder retracts, causing the first limiting cylinder to stop. The piston rod of the cylinder disengages from the first positioning fixture 710, and the conveying device 100 continues to drive the first positioning fixture 710 forward. When it approaches the pressing station, the piston rod of the second limiting cylinder extends above the conveying device 100 and abuts against the first positioning fixture 710 to prevent the first positioning fixture 710 from moving forward, so that the first positioning fixture 710 stops precisely at the pressing station. Then the pressing device 300 presses the stator 20 into the housing 10. After the pressing is completed, the piston rod of the second limiting cylinder retracts, and the conveying device 100 continues to drive the first positioning fixture 710 and the housing 10 and stator 20 that have completed the heat fitting forward to the downstream equipment. The first and second limit cylinders abut against the first positioning fixture 710 through the extension and retraction of the piston rod. This provides rigid limiting when the conveying device 100 moves the first positioning fixture 710 to the heating station and the pressing station, effectively counteracting the inertial force when the conveying device 100 stops. This prevents the first positioning fixture 710 from shifting due to inertia, ensuring that the first positioning fixture 710 remains stably in the heating station and the pressing station during the heating and pressing process, thereby improving the heat fitting accuracy of the motor stator heat fitting equipment.

[0025] refer to Figure 1 , Figure 2 and Figure 4The motor stator heat fitting equipment also includes a first lifting device 400. The heating device 200 includes a heating coil 210 and a power supply module 220. The heating coil 210 is electrically connected to the power supply module 220. The power supply module 220 is mounted on the frame 700 and is used to supply power to the heating coil 210. The first lifting device 400 is mounted on the frame 700 and is used to push the first positioning fixture 710 at the heating station upward so that the heating coil 210 extends into the housing 10 on the first positioning fixture 710. Understandably, the operator first places the housing 10 on the first positioning fixture 710 and the stator 20 on the second positioning fixture 720. The conveying device 100 then moves the first positioning fixture 710 from back to front to the heating station and stops. Subsequently, the first lifting device 400 is activated, pushing the first positioning fixture 710 at the heating station upwards, causing the housing 10 on the first positioning fixture 710 to move upwards and leave the conveying device 100 until the heating coil 210 of the heating device 200 extends into the housing 10. At this time, the power supply module 220 supplies power to the heating coil 210, which heats the housing 10. After the housing 10 is heated to the appropriate size, the power supply module 220 stops supplying power, the first lifting device 400 is reset downwards, and the first positioning fixture 710 and the housing 10 are moved down. The heating coil 210 is removed from the housing 10, and the first positioning fixture 710 is placed back on the conveying device 100. Then the conveying device 100 moves the first positioning fixture 710 and the heated housing 10 forward to the pressing station.

[0026] In this embodiment of the utility model, the heating device 200 further includes an inner diameter detection sensor and a temperature control module. The inner diameter detection sensor is located at the end of the heating coil 210 and is used to detect the inner diameter of the housing 10 in real time. The temperature control module is electrically connected to the power supply module 220 and the inner diameter detection sensor, and is used to receive the inner diameter detection data and control the output power of the power supply module 220. The first lifting device 400 pushes the first positioning fixture 710 upward, causing the heating coil 210 to extend into the housing 10. The power supply module 220, under the control of the temperature control module, supplies power to the heating coil 210, which heats the housing 10. Simultaneously, the inner diameter detection sensor continuously detects the inner diameter of the housing 10 and transmits the data to the temperature control module. The temperature control module compares the detected value with the preset assembly size. If the current inner diameter of the housing 10 does not reach the preset assembly size, the power supply of the power supply module 220 is maintained or adjusted to keep the heating coil 210 heating. If the current inner diameter of the housing 10 reaches the preset size, the temperature control module immediately controls the power supply module 220 to stop supplying power, the heating coil 210 stops heating, and then the first lifting device 400 moves downward to reset, causing the first positioning fixture 710 to be placed back on the conveying device 100. The heating coil 210 then exits the housing 10, completing the heating of the housing 10. In this embodiment of the invention, the inner diameter detection sensor is located within the heat insulation structure, and the inner diameter detection sensor is a common distance sensor, which will not be further described here.

[0027] In this embodiment of the utility model, the first lifting device 400 includes a first lifting cylinder and a first support plate. The cylinder body of the first lifting cylinder is connected to the frame 700, and the first support plate is connected to the piston rod of the first lifting cylinder. The first support plate is provided with a plurality of first guide posts, and the first positioning fixture 710 is provided with a plurality of first guide holes. The first lifting cylinder can drive the first support plate to rise so that the plurality of first guide posts are respectively inserted into the plurality of first guide holes, and the first support plate lifts the first positioning fixture 710 upward. Understandably, when the first positioning fixture 710 moves to the heating station and stops, the first lifting cylinder of the first lifting device 400 is activated. The piston rod of the first lifting cylinder extends and drives the first support plate upward. At this time, the multiple first guide pins on the first support plate align with the multiple first guide holes on the first positioning fixture 710 and are inserted. As the first support plate continues to rise, after the first guide pins are fully inserted into the first guide holes, the first support plate contacts the first positioning fixture 710 and smoothly lifts the first positioning fixture 710 upward until the heating coil 210 extends into the housing 10. After the lifting is completed, the first lifting cylinder maintains the lifting state. After heating is completed, the piston rod of the first lifting cylinder retracts, the first support plate places the first positioning fixture 710 on the conveying device 100, and the first guide pins are pulled out from the first guide holes. During the lifting process, the first guide hole and the first guide post cooperate to limit the first positioning fixture 710 in the horizontal direction, ensuring that the first positioning fixture 710 and the housing 10 rise smoothly, avoiding collision between the housing 10 and the heating coil 210, so that the heating process can proceed smoothly.

[0028] refer to Figures 1 to 3The motor stator heat fitting equipment also includes a translation device 600 and a second lifting device 500. Both the translation device 600 and the lifting device 500 are mounted on a frame 700. The frame 700 also has a centering station located above the pressing station. The translation device 600 drives the second positioning fixture 720 to move left and right, allowing it to move to or away from the centering station. The second lifting device 500 pushes the first positioning fixture 710 at the pressing station upwards, so that... The first positioning fixture 710 can be moved to the centering position. The pressing device 300 includes a lifting drive mechanism 310 and a tensioning mechanism 320. The lifting drive mechanism 310 is mounted on the frame 700. The lifting drive mechanism 310 can drive the tensioning mechanism 320 to descend to the centering position so that the tensioning mechanism 320 extends into the stator 20 on the second positioning fixture 720 at the centering position and tensions the stator 20, or the tensioning mechanism 320 can install the stator 20 into the housing 10 on the first positioning fixture 710 at the centering position. Understandably, after the first positioning fixture 710 moves to the pressing station and stops, the translation device 600 is activated, driving the second positioning fixture 720, which already has the stator 20 placed on it, to move to the right to the centering station; subsequently, the lifting drive mechanism 310 is activated, driving the tensioning mechanism 320 to descend to the centering station, so that the tensioning mechanism 320 extends into the stator 20 on the second positioning fixture 720 and tensions the stator 20; then the lifting drive mechanism 310 drives the tensioning mechanism 320 and the stator 20 tensioned by the tensioning mechanism 320 to rise; after that, the translation device 600 drives... The second positioning fixture 720 moves to the left, moving away from the centering station to avoid the subsequent pressing path. Then, the second lifting device 500 is activated, pushing the first positioning fixture 710 and the heated housing 10 at the pressing station upwards, moving the first positioning fixture 710 and housing 10 to the centering station. At the same time, the lifting drive mechanism 310 drives the tensioning mechanism 320 and the stator 20 to descend to the centering station, so that the stator 20 is accurately installed into the housing 10 on the first positioning fixture 710 at the centering station, thus completing the hot fitting of the stator 20.

[0029] refer to Figure 5 and Figure 6The tensioning mechanism 320 includes a finger cylinder 321 and multiple tensioning claws 322. The cylinder body of the finger cylinder 321 is connected to the output end of the lifting drive mechanism 310. The finger cylinder 321 has a center line, which coincides with the central axis of the upper housing 10 of the first positioning fixture 710 at the pressing station. The upper ends of the multiple tensioning claws 322 are respectively connected to the multiple output ends of the finger cylinder 321. The multiple tensioning claws 322 are distributed circumferentially around the center line. The lower ends of the multiple tensioning claws 322 are used to extend into the stator 20. The finger cylinder 321 can drive the multiple tensioning claws 322 to move away from each other so that the lower ends of the multiple tensioning claws 322 can be pressed against the inner wall of the stator 20 at the same time, and the central axis of the stator 20 coincides with the center line. Understandably, the lifting drive mechanism 310 drives the finger cylinder 321 and multiple clamping claws 322 to descend. The lower ends of the multiple clamping claws 322 extend into the stator 20 on the second positioning fixture 720. After descending to the correct position, the finger cylinder 321 is activated. The multiple output ends of the finger cylinder 321 drive the multiple circumferentially distributed clamping claws 322 to move away from each other, so that the lower ends of the clamping claws 322 are simultaneously pressed against the inner wall of the stator 20. During this process, due to the positioning action of the first positioning fixture 710, the center line of the finger cylinder 321 coincides with the central axis of the housing 10 at the pressing station. The multiple clamping claws 322 calibrate the stator 20 through uniform radial force, so that the central axis of the stator 20 is precisely aligned with the center line of the finger cylinder 321 and the central axis of the housing 10, thus completing the centering and clamping of the stator 20. Next, the lifting drive mechanism 310 drives the finger cylinder 321, the clamping claw 322, and the stator 20 clamped by the clamping claw 322 to rise. After the first positioning fixture 710 and the housing 10 rise from the pressing station to the centering station, the lifting drive mechanism 310 drives the finger cylinder 321, the clamping claw 322, and the stator 20 clamped by the clamping claw 322 to descend, so that the stator 20 is pressed into the housing 10. Finally, the finger cylinder 321 drives the multiple clamping claws 322 to move closer to each other, so that the multiple clamping claws 322 disengage from the inner wall of the stator 20, and the lifting drive mechanism 310 drives the finger cylinder 321 and the multiple clamping claws 322 to rise and reset. By synchronously operating multiple circumferentially distributed clamping claws 322, the stator 20 can be reliably clamped to prevent it from loosening or falling during lifting and pressing. The symmetrical radial force of the multiple clamping claws 322 can also automatically calibrate the attitude of the stator 20, ensuring that the stator 20 is strictly aligned with the central axis of the housing 10. This avoids damage to the housing 10 or the stator 20 due to eccentricity during pressing, which helps to improve the pressing accuracy of the stator 20 and the quality of thermal assembly.

[0030] It should be explained that, in this embodiment of the invention, after the second positioning fixture 720 moves to the centering position, the central axis of the stator 20 coincides with the center line of the finger cylinder 321 under the positioning action of the second positioning fixture 720. It should also be explained that tightening refers to applying radial force to the inner wall of the stator 20 through the tightening claw 322, causing the tightening claw 322 to fit tightly against the stator 20 to form a firm connection. Due to the friction between the tightening claw 322 and the inner wall of the stator 20, as well as the clamping force generated by the radial pressure, the clamping force can overcome the weight of the stator 20 itself. Therefore, when the tightening mechanism 320 rises and falls, the tightening claw 322 can drive the stator 20 to rise and fall synchronously, ensuring that the stator 20 will not fall off or shift during movement.

[0031] refer to Figure 6 The lower end of the clamping claw 322 is provided with a fitting arc plate 323, and the lower end of the clamping claw 322 abuts against the inner wall of the stator 20 through the fitting arc plate 323. Understandably, the lower end of the clamping claw 322 abuts against the inner wall of the stator 20 via the fitting arc plate 323, effectively increasing the contact area between the lower end of the clamping claw 322 and the inner wall of the stator 20, thus preventing damage to the inner wall of the stator 20 due to excessive local force on the lower end of the clamping claw 322. On the other hand, the fitting arc plate 323 forms a surface contact with the inner wall of the stator 20, allowing the radial force generated by the clamping claw 322 to be transmitted more evenly to the stator 20, enhancing the clamping stability of the stator 20 and preventing slippage or swaying of the stator 20 during clamping, lifting, and pressing. Furthermore, the arc surface of the fitting arc plate 323 better adapts to the circular contour of the inner wall of the stator 20, further improving the alignment accuracy between the central axis of the stator 20 and the center line of the finger cylinder 321, ensuring that the stator 20 remains coaxial with the housing 10 during pressing and reducing assembly deviations. (Reference) Figure 6 The tensioning mechanism 320 includes at least three tensioning claws 322. It is understood that providing at least three tensioning claws 322 allows for stable radial support through a circumferential distribution at three or more points, preventing the stator 20 from rotating or swaying around the support points due to insufficient force during tensioning. This ensures that the stator 20 is evenly tensioned and that its central axis coincides with the center line of the finger cylinder 321. As a preferred embodiment of this invention, the tensioning mechanism 320 includes three tensioning claws 322.

[0032] refer to Figure 5 and Figure 6The motor stator heat-shrinking device also includes a mounting plate 330, which is connected to the output end of the lifting drive mechanism 310. The cylinder body of the finger cylinder 321 is connected to the mounting plate 330. The mounting plate 330 is provided with multiple positioning rods 340, which are distributed circumferentially around a center line. The lower ends of the positioning rods 340 are all located above the lower end of the clamping claw 322. The positioning rods 340 are respectively used to insert into multiple structural holes on the stator 20. It should be explained that the structural holes of the stator 20 refer to multiple through holes or blind holes distributed circumferentially around the central axis of the stator 20 on the outer wall of the stator 20, typically used for the installation and fixation of the stator 20 or for cooperation with other components. It is understood that when the lifting drive mechanism 310 drives the mounting plate 330 to descend, the finger cylinder 321 and the multiple positioning rods 340 connected to the mounting plate 330 descend synchronously. Multiple clamping claws 322 first extend into the stator 20 on the second positioning fixture 720. As the mounting plate 330 descends, the lower ends of multiple positioning rods 340, circumferentially distributed around the center line of the finger cylinder 321, align with and insert into multiple structural holes on the outer wall of the stator 20. Then, the finger cylinder 321 drives the multiple clamping claws 322 to move away from each other and press against the inner wall of the stator 20. By cooperating with the structural holes on the stator 20, the positioning rods 340 can pre-position the stator 20 before the clamping claws 322 move, limiting the rotation and offset of the stator 20 in the horizontal direction, ensuring that the initial posture of the stator 20 remains coaxial with the center line of the finger cylinder 321, providing a reference for the subsequent calibration of the clamping claws 322. At the same time, during the clamping and lifting process, the positioning rods 340 can help fix the stator 20, preventing the stator 20 from tilting during the clamping and lifting process, which is beneficial to improving the quality of the thermal assembly.

[0033] In this embodiment of the invention, the conveying device 100 includes two belt conveying mechanisms, both mounted on the frame 700 and parallel to the front-to-back direction. The two belt conveying mechanisms simultaneously support both sides of the first positioning fixture 710, and are used to drive the first positioning fixture 710 to move from back to front. Specifically, the belts in the two conveying mechanisms simultaneously support both sides of the first positioning fixture 710, enabling the two belts to convey the first positioning fixture 710 from back to front. Belt conveying mechanisms are common conveying mechanisms and will not be further described here.

[0034] In this embodiment of the invention, the first lifting device 400 and the second lifting device 500 are both located between two belt conveyor mechanisms. The first lifting device 400 is positioned corresponding to the heating station, and the second lifting device 500 is positioned corresponding to the pressing station. The structure of the second lifting device 500 is the same as that of the first lifting device 400, and will not be described further here. In this embodiment of the invention, the lifting drive mechanism 310 includes a lifting cylinder, multiple guide sleeves, and multiple guide rods. The cylinder body of the lifting cylinder is connected to the frame 700, the lower ends of the multiple guide rods are all connected to the frame 700, the multiple guide sleeves are all mounted on the mounting plate 330, and the multiple guide sleeves are respectively fitted onto the multiple guide rods. The piston rod of the lifting cylinder is connected to the mounting plate 330. In this embodiment of the invention, the translation device 600 is a common slider-rail cylinder-type linear drive device. The slider in the slider-rail cylinder-type linear drive device is connected to the second positioning fixture 720, and will not be described further here. In this embodiment of the present invention, after the thermal assembly of the stator 20 is completed, the two belt conveyor mechanisms continue to transport the first positioning fixture 710 and the thermally assembled stator 20 and housing 10 forward, so that the first positioning fixture 710 and the thermally assembled stator 20 and housing 10 leave the pressing station and move to the downstream equipment; then, the operator places the housing 10 to be assembled on the first positioning fixture 710, places the stator 20 to be assembled on the second positioning fixture 720, and places the first positioning fixture 710 at the rear end of the two belt conveyor mechanisms to start a new thermal assembly operation.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A motor stator heat-shrinking device, characterized in that, include: The frame (700) is provided with a heating station and a pressing station, wherein the pressing station is located in front of the heating station; The first positioning fixture (710) is used to position the housing (10); A conveying device (100) is used to convey the first positioning fixture (710) from back to front, so that the first positioning fixture (710) moves sequentially to the heating station and the pressing station; A heating device (200) is provided on the frame (700), and the heating device (200) is used to heat the housing (10) on the first positioning fixture (710) at the heating station. The second positioning fixture (720) is disposed on the frame (700) and is used to position the stator (20). A pressing device (300) is provided on the frame (700). The pressing device (300) is used to insert the stator (20) on the second positioning fixture (720) from top to bottom into the housing (10) on the first positioning fixture (710) at the pressing station.

2. The motor stator heat-shrinking device according to claim 1, characterized in that: It also includes a first limiting cylinder, the cylinder body of which is mounted on the frame (700), and the piston rod of which can extend above the conveying device (100) and abut against the first positioning fixture (710) so that the first positioning fixture (710) stays at the heating station.

3. The motor stator heat-shrinking device according to claim 1, characterized in that: It also includes a second limiting cylinder, the cylinder body of which is mounted on the frame (700), and the piston rod of which can extend above the conveying device (100) and abut against the first positioning fixture (710) so that the first positioning fixture (710) stays at the pressing station.

4. The motor stator heat-shrinking device according to claim 1, characterized in that: It also includes a first lifting device (400). The heating device (200) includes a heating coil (210) and a power supply module (220). The heating coil (210) is electrically connected to the power supply module (220). The power supply module (220) is mounted on the frame (700) and is used to supply power to the heating coil (210). The first lifting device (400) is mounted on the frame (700) and is used to push the first positioning fixture (710) at the heating station upward so that the heating coil (210) extends into the housing (10) on the first positioning fixture (710).

5. The motor stator heat-shrinking device according to claim 4, characterized in that: The first lifting device (400) includes a first lifting cylinder and a first support plate. The cylinder body of the first lifting cylinder is connected to the frame (700). The first support plate is connected to the piston rod of the first lifting cylinder. The first support plate is provided with a plurality of first guide posts. The first positioning fixture (710) is provided with a plurality of first guide holes. The first lifting cylinder can drive the first support plate to rise so that the plurality of first guide posts are respectively inserted into the plurality of first guide holes, and the first support plate lifts the first positioning fixture (710) upward.

6. The motor stator heat-shrinking device according to claim 1, characterized in that: It also includes a translation device (600) and a second lifting device (500), both of which are mounted on the frame (700). The frame (700) also has a centering station located above the pressing station. The translation device (600) drives the second positioning fixture (720) to move left and right, allowing it to move to or away from the centering station. The second lifting device (500) pushes the first positioning fixture (710) upwards at the pressing station, allowing the first positioning fixture (710) to move upwards. 10) The press-fitting device (300) is capable of being moved to the centering station. The press-fitting device (300) includes a lifting drive mechanism (310) and a tensioning mechanism (320). The lifting drive mechanism (310) is located on the frame (700). The lifting drive mechanism (310) can drive the tensioning mechanism (320) to descend to the centering station so that the tensioning mechanism (320) extends into the stator (20) on the second positioning fixture (720) at the centering station and tensions the stator (20), or the tensioning mechanism (320) inserts the stator (20) into the housing (10) on the first positioning fixture (710) at the centering station.

7. The motor stator heat-shrinking device according to claim 6, characterized in that: The tensioning mechanism (320) includes a finger cylinder (321) and multiple tensioning claws (322). The cylinder body of the finger cylinder (321) is connected to the output end of the lifting drive mechanism (310). The finger cylinder (321) has a center line that coincides with the central axis of the upper housing (10) of the first positioning fixture (710) at the pressing station. The upper ends of the multiple tensioning claws (322) are respectively connected to the multiple output ends of the finger cylinder (321). The multiple tensioning claws (322) are circumferentially distributed around the center line. The lower ends of the multiple tensioning claws (322) are used to extend into the stator (20). The finger cylinder (321) can drive the multiple tensioning claws (322) to move away from each other so that the lower ends of the multiple tensioning claws (322) can be pressed against the inner wall of the stator (20) at the same time, and the central axis of the stator (20) coincides with the center line.

8. The motor stator heat-shrinking device according to claim 7, characterized in that: The lower end of the clamping claw (322) is provided with a fitting arc plate (323), and the lower end of the clamping claw (322) abuts against the inner wall of the stator (20) through the fitting arc plate (323).

9. The motor stator heat-shrinking device according to claim 7, characterized in that: The tensioning mechanism (320) includes at least three tensioning claws (322).

10. The motor stator heat-shrinking device according to claim 7, characterized in that: It also includes a mounting plate (330), which is connected to the output end of the lifting drive mechanism (310). The cylinder body of the finger cylinder (321) is connected to the mounting plate (330). The mounting plate (330) is provided with multiple positioning rods (340). The multiple positioning rods (340) are distributed circumferentially around the center line. The lower ends of the multiple positioning rods (340) are all located above the lower end of the clamping claw (322). The multiple positioning rods (340) are respectively used to insert into multiple structural holes on the stator (20).

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