Stator slot type automatic sizing tooling

Abstract

The utility model belongs to motor manufacturing technical field especially relates to a kind of stator slot type automatic expansion tooling. Including machine table unit, the machine table unit includes machine table frame and movable sliding table, sliding table is driven by translation driving part;Stator fixing unit is set on the sliding table, including the tooling sleeve for accommodating stator and the compression part for compressing stator;Radial expansion actuator is used to produce radial expansion movement under axial power drive;Jacking unit is set in the machine table frame, and its power output end is connected with the radial expansion actuator;The working end of radial expansion actuator can produce radial expansion movement under the axial power provided by the jacking unit, and can be radially retracted under the action of built-in elastic reset element. It adopts the equal number of expansion teeth that is distributed uniformly with stator slot type on the periphery of expansion sleeve body, and the expansion teeth are extended under the pushing of expansion core, and the expansion work of stator slot type can be completed at one time.

Description

Technical Field

[0001] This utility model belongs to the field of motor manufacturing technology, and in particular relates to an automatic expansion tooling for stator slots. Background Technology

[0002] In the field of motor winding production, winding expansion is a critical process to ensure motor performance, and its accuracy directly affects the motor's insulation performance, heat dissipation efficiency, and operational stability. Currently, winding expansion in the industry largely relies on manual operation, which not only suffers from low efficiency and high labor intensity, but also results in significant variations in expansion accuracy due to differences in human feel. This leads to poor consistency in the dimensions of stator slots within the same batch after expansion, making it impossible to guarantee the pass rate and meet the needs of large-scale production.

[0003] The low efficiency of manual forming (approximately 5 minutes per machine) is mismatched with the cycle time of automated production lines, becoming a bottleneck restricting capacity improvement. Furthermore, the lack of stability in manual operation makes quality control through data traceability difficult. Therefore, an automated forming tooling is urgently needed to address these industry pain points. Summary of the Invention

[0004] This utility model addresses the shortcomings of existing technologies by providing an automatic stator slot expansion tool.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a stator slot type automatic expansion tooling includes a machine base unit, the machine base unit includes a machine base frame and a movable slide table disposed thereon, the slide table being driven by a translation drive component;

[0006] A stator fixing unit is disposed on the slide table and includes a tooling sleeve for accommodating the stator and a clamping component for clamping the stator.

[0007] A radial expansion actuator is used to generate radial expansion motion under axial power drive.

[0008] A lifting unit is installed inside the machine frame, and its power output end is connected to the radial expansion actuator to drive the radial expansion actuator to lift as a whole and provide it with the axial power.

[0009] The working end of the radial expansion actuator can generate radial expansion motion under the axial power provided by the lifting unit, and can radially contract and reset under the action of the built-in elastic reset element.

[0010] Furthermore, the radial expansion actuator adopts an expansion unit, including an expansion sleeve, an expansion core, and multiple expansion teeth; the expansion sleeve is a hollow tubular structure, with multiple slots evenly distributed along its length on its outer circumference; a circular hole is opened in the center of the bottom of each slot for connecting to the inner cavity of the expansion sleeve; the expansion teeth are disposed in the slots, with each slot corresponding to one expansion tooth; one end of the expansion tooth is hinged to the outer wall of the expansion sleeve through a hinge seat, and the other end of the expansion tooth serves as a power input end, extending into the inner cavity of the expansion sleeve through the circular hole; the expansion core is housed inside the expansion sleeve, and an inclined platform is provided on its upper part, which contacts and engages with the power input end of the expansion tooth.

[0011] Furthermore, the built-in elastic reset element is a reset spring, and the expansion tooth is provided with a reset spring through hole. All the reset spring through holes of the expansion teeth share a common reset spring, which is connected end to end to form a ring, and is used to provide elastic tension to make the expansion tooth radially reset; the power output end of the lifting unit is connected to the expansion core, and is used to drive its lifting and lowering; when the expansion core rises, it pushes the power input end of the expansion tooth through the inclined platform, forcing the expansion tooth to open radially outward around the hinge point.

[0012] Furthermore, the lifting unit includes a primary lifting mechanism and a secondary lifting mechanism; the primary lifting mechanism includes a primary driving component for driving the secondary lifting mechanism and the expansion unit as a whole to move in the vertical direction; the secondary lifting mechanism includes a secondary driving component, the power output end of which is connected to the expansion core for driving the expansion core to move relative to the expansion sleeve body.

[0013] Furthermore, the lifting unit also includes multiple guide support rods vertically fixed within the machine frame; the primary lifting mechanism includes a primary mounting plate connected to the piston rod of the primary drive component, the primary mounting plate being slidably fitted onto the guide support rods; the secondary lifting mechanism includes a secondary mounting plate connected to the piston rod of the secondary drive component, the secondary mounting plate being connected to the primary mounting plate via a connecting structure, and being slidably fitted onto the guide support rods.

[0014] Furthermore, the expansion sleeve is fixed to a follower plate by a positioning sleeve, the follower plate is fixedly connected to the secondary mounting plate of the secondary lifting mechanism, and is slidably sleeved on the guide support rod.

[0015] Furthermore, the power input end of the expansion tooth is provided with a guide wheel, which makes rolling contact with the inclined platform of the expansion core.

[0016] Furthermore, the tooling sleeve has an axially arranged angular positioning strip on its inner wall, which is used to cooperate with the axial groove of the outer circular side wall of the stator to achieve angular positioning.

[0017] Furthermore, the translation drive component is a translation cylinder, the cylinder body of which is fixed to the top surface of the machine frame, and the cylinder rod of which is connected to the slide. The machine unit also includes guide rails on both sides of the slide's movement direction and stops for limiting the slide's travel. The slide is slidably connected to the guide rails, and through holes are provided at the center of the slide and at corresponding positions on the upper end of the machine frame for the radial expansion actuator to pass through.

[0018] Furthermore, a guide sleeve with a conical top is fixedly connected to the top of the expansion sleeve body. The bottom of the guide sleeve is inserted into the inner cavity of the expansion sleeve body, and the two are tightly fitted together. The guide sleeve is provided with an axial limiting shoulder that cooperates with the inner cavity of the expansion sleeve body.

[0019] Compared with the prior art, this utility model has the following advantages.

[0020] This utility model's expanding tooling employs expanding teeth evenly distributed around the periphery of the expanding sleeve, with the same number as the stator slots. Driven by the expanding core, the teeth extend, completing the stator slot expanding process in one operation. After the expanding teeth complete the stator slot expanding process, a ring-shaped return spring penetrating the teeth simultaneously resets all the expanded teeth. Furthermore, the stator fixing unit, through the installation of angular positioning strips and clamping cylinders, achieves precise radial and axial fixing of the stator, ensuring reliable and stable positioning. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0022] Figure 1 This is a 3D view of the stator slot automatic expansion tooling of the embodiment.

[0023] Figure 2 This is a top view of the stator slot type automatic expansion tooling in the embodiment.

[0024] Figure 3 This is a schematic diagram of the open side structure of the stator slot type automatic expansion tooling in an embodiment.

[0025] Figure 4 This is a three-dimensional view of the stator slot type automatic expansion tooling lifting unit in the embodiment.

[0026] Figure 5 This is a three-dimensional view of the tooling kit for the automatic expansion tooling of the stator slot type in the embodiment.

[0027] Figure 6 This is a schematic diagram of the stator slot type automatic expansion tooling expansion unit and other components in an embodiment.

[0028] Figure 7 This is a schematic diagram of the stator slot type automatic expansion tooling expansion unit structure in an embodiment.

[0029] Figure 8 This is a cross-sectional view of the expansion unit of the stator slot automatic expansion tooling in the embodiment.

[0030] Figure 9 This is a schematic diagram of the stator slot type automatic expansion tooling expansion unit removing the guide sleeve in an embodiment.

[0031] Figure 10 This is a schematic diagram of the connection between the expansion teeth of the expansion unit and the return spring in an embodiment.

[0032] Figure 11 This is a three-dimensional view of the tooth expansion of the stator slot automatic expansion tool in the embodiment.

[0033] Figure 12-13 yes Figure 10 Enlarged view of a portion of the diagram.

[0034] Figure 14 yes Figure 9 Enlarged view of a portion of the diagram.

[0035] Figure 15 yes Figure 4 Enlarged view of a portion of the diagram.

[0036] Figure 16 yes Figure 8 Enlarged view of a portion of the diagram.

[0037] In the diagram, 1. Machine base unit; 2. Stator fixing unit; 3. Lifting unit; 4. Expansion unit; 101. Machine base frame; 102. Stop (or stop block); 103. Guide rail; 104. Slide table; 105. Translation cylinder; 106. Foot switch; 107. Button box; 108. Light grating; 201. Tooling sleeve; 202. Stator; 203. Clamping cylinder; 204. Angular positioning strip; 205. Notch; 206. Stator slot wedge; 301. First-stage drive component; 302. First-stage mounting plate; 303. Connecting column; 304. Connecting plate; 305. Support column; 306. Secondary drive component; 307. Secondary mounting plate; 308. Flange seat; 309. Follower plate; 310. Guide support rod; 401. Positioning sleeve; 402. Tightening screw; 403. Expansion sleeve body; 404. Guide sleeve; 405. Expansion tooth; 406. Hinge seat; 407. Groove; 408. Pin; 409. Earring; 410. Return spring; 411. Guide wheel; 412. Expansion core; 413. Inclined platform; 414. Pin hole; 415. Return spring through hole; 416. Guide wheel mounting hole; 417. Tip; 418. Shoulder; 419. Pin shaft. Detailed Implementation

[0038] like Figure 1-16As shown, the stator slot-type automatic expansion fixture includes a machine unit 1, which includes a machine frame 101 and a movable slide 104 mounted thereon. The slide 104 is driven by a translation drive component. It also includes a stator fixing unit 2, a radial expansion actuator, and a lifting unit 3. The stator fixing unit 2 is mounted on the slide 104 and includes a fixture sleeve 201 for accommodating the stator 202 and a clamping component for clamping the stator. The radial expansion actuator generates radial expansion motion under axial power drive. The lifting unit 3 is located within the machine frame 101, and its power output end is connected to the radial expansion actuator, driving the radial expansion actuator to lift and lower as a whole and providing it with axial power. The working end of the radial expansion actuator can generate radial expansion motion under the axial power provided by the lifting unit 3, and can radially contract and reset under the action of a built-in elastic reset element.

[0039] The lifting unit 3 drives the radial expansion actuator to rise into the stator inner hole and further provides axial power to drive the working end of the radial expansion actuator to expand radially and insert into the stator slot wedge 206 to complete the expansion. After the expansion is completed, the lifting unit 3 falls back, and the working end of the radial expansion actuator radially contracts and resets under the action of the built-in elastic reset element.

[0040] Preferably, the radial expansion actuator adopts an expansion unit 4, including an expansion sleeve 403, an expansion core 412, and multiple expansion teeth 405. The expansion sleeve 403 is a hollow tubular structure, and multiple slots 407 extending through the length direction are evenly distributed on its outer wall. A circular hole is opened in the middle of the bottom of the slot 407 to connect to the inner cavity of the expansion sleeve. The expansion teeth 405 are disposed in the slots 407, and each slot 407 corresponds to one expansion tooth 405. One end of the expansion tooth 405 is hinged to the outer wall of the expansion sleeve 403 through a hinge seat 406, and the other end of the expansion tooth 405 serves as the power input end and extends into the inner cavity of the expansion sleeve 403 through the circular hole. The expansion core 412 is housed inside the expansion sleeve 403, and an inclined platform 413 is provided on its upper part. The inclined platform 413 contacts and engages with the power input end of the expansion tooth 405.

[0041] Preferably, the built-in elastic reset element is a reset spring 410. The expansion teeth 405 are provided with reset spring through holes 415. All the reset spring through holes 415 of the expansion teeth 405 share a common reset spring 410. The reset spring 410 is connected end to end to form a ring, which is used to provide elastic tension to make the expansion teeth 405 radially reset. The power output end of the lifting unit 3 is connected to the expansion core 412 to drive its lifting and lowering. When the expansion core 412 rises, it pushes the power input end of the expansion teeth 405 through the inclined platform 413, forcing the expansion teeth 405 to open radially outward around the hinge point.

[0042] Specifically, the lifting unit 3 includes a primary lifting mechanism and a secondary lifting mechanism. The primary lifting mechanism includes a primary drive component 301, which drives the secondary lifting mechanism and the expansion unit 4 as a whole to move vertically; the primary drive component is a primary cylinder. The secondary lifting mechanism includes a secondary drive component 306, whose power output end is connected to the expansion core 412, and is used to drive the expansion core 412 to move relative to the expansion sleeve body 403. The secondary drive component is a secondary cylinder. The lifting unit 3 also includes multiple guide support rods 310 vertically fixed within the machine frame 101; the primary lifting mechanism includes a primary mounting plate 302 connected to the piston rod of the primary drive component 301, and the primary mounting plate 302 is slidably fitted onto the guide support rods 310; the primary mounting plate is also the primary cylinder mounting plate; the secondary lifting mechanism includes a secondary mounting plate 307 connected to the piston rod of the secondary drive component 306, and the secondary mounting plate 307 is connected to the primary mounting plate 302 through a connecting structure and is slidably fitted onto the guide support rods 310. The secondary mounting plate, also known as the secondary cylinder mounting plate, consists of a connecting structure including the connecting column 303, the connecting plate 304, and the secondary cylinder mounting plate.

[0043] Preferably, the expansion sleeve 403 is fixed to a follower plate 309 by a positioning sleeve 401. The follower plate 309 is fixedly connected to the secondary mounting plate 307 of the secondary lifting mechanism and is slidably sleeved on the guide support rod 310. The addition of the follower plate enhances the guiding height and makes the guiding more stable.

[0044] In one possible embodiment, the side wall of the positioning sleeve 401 is provided with a radial threaded through hole, and the expansion sleeve body 403 is tightened and fixed by a screw 402.

[0045] In another possible embodiment, the power input end of the expansion gear 405 is provided with a guide wheel mounting hole, and the guide wheel is rotatably mounted on the power input end via a wheel axle. The power input end of the expansion gear 405 is provided with a guide wheel 411, and the guide wheel 411 is in rolling contact with the inclined platform 413 of the expansion core 412.

[0046] Preferably, the inner wall of the tooling sleeve 201 is provided with an angular positioning strip 204, which is used to cooperate with the axial groove of the outer circular side wall of the stator 202 to achieve angular positioning.

[0047] In another possible embodiment, the tooling sleeve 201 is mounted on the slide table 104 and secured with fasteners.

[0048] In another possible embodiment, the clamping component adopts a clamping cylinder 203. The bottom of the clamping cylinder 203 is embedded and installed in the notch 205 axially opened on the outer circle of the tooling sleeve 201. The pressure head of the clamping cylinder 203 can rotate and clamp the upper end of the stator 202 placed in the tooling sleeve 201.

[0049] In another possible embodiment, machine unit 1 also includes a light curtain 108 for safety protection and a button box 107 and a foot switch 106 for controlling the start and stop of the equipment. The light curtain 108 refers to a light curtain sensor for safety protection, i.e., a safety light curtain. It monitors hazardous areas during manual loading, and immediately stops the equipment if an operator intrudes, thus ensuring the operator's safety. The light curtain is specifically located at the manual loading side end of the slide table 104, and the button box 107 and foot switch 106 are used to control the start and stop of the equipment.

[0050] Preferably, the translation drive component is a translation cylinder 105. The cylinder body of the translation cylinder 105 is fixed to the top surface of the machine frame 101, and the cylinder rod of the translation cylinder 105 is connected to the slide table 104. The machine unit 1 also includes guide rails 103 disposed on both sides of the slide table 104 in the direction of movement and a stop 102 for limiting the stroke of the slide table 104. The slide table 104 is slidably connected to the guide rails 103. The center of the slide table 104 and the corresponding position at the upper end of the machine frame 101 are provided with through holes for the radial expansion actuator to pass through.

[0051] Preferably, the top of the expansion sleeve 403 is fixedly connected to a guide sleeve 404 with a conical top structure. The bottom of the guide sleeve 404 is inserted into the inner cavity of the expansion sleeve 403, and the two are tightly fitted together. The guide sleeve 404 is provided with an axial limiting shoulder that cooperates with the inner cavity of the expansion sleeve 403.

[0052] In another possible embodiment, the outwardly extending end face of the expansion tooth 405 (the end face away from the spring) is provided with a tip 417 for easy insertion into the stator slot wedge.

[0053] In another possible embodiment, one end of the expansion tooth 405 is hinged to the outer wall of the expansion sleeve 403 via a hinge seat 406; wherein, the hinge seat is composed of two earrings 409 fixed on the expansion sleeve, and the end of the expansion tooth 405 is provided with a pin hole 414. During installation, the end of the expansion tooth 405 is located between the two earrings 409, and a pin shaft 419 passes through the two earrings and the pin hole 414, and the end that passes through is locked with a pin 408.

[0054] Detailed explanation of the solution's working process and application:

[0055] 1. Machine Unit 1: Composed of machine frame 101, guide rail 103, slide table 104, etc., providing the foundation for equipment installation. Light grating 108 and foot switch 106 are used to ensure operational safety.

[0056] In the stator fixing unit 2, the stator 202 is fixed by the tooling sleeve 201 and the clamping cylinder 203, and the angular positioning strip 204 constrains the angular position of the stator to ensure that the expansion teeth in the expansion form are aligned with the stator slot wedge.

[0057] The specific connection relationship of machine unit 1 is as follows: A pair of guide rails 103 are arranged parallel to each other on the upper end of the machine frame 101. A slide table 104 is arranged on the upper end of the guide rails 103. A slide table 104 is installed at the bottom of the slide table 104 to slide in cooperation with the guide rails 103. A translation cylinder 105 is installed on the non-manual feeding side of the slide table 104. The body of the translation cylinder 105 is fixed to the upper end of the machine frame 101. The extension rod of the translation cylinder is fixed to the end face of the slide table by bolts. The extension and retraction of the cylinder can drive the slide table 104 to move on the guide rails 103. Stops 102 are set at the ends of the stroke on both sides of the slide table 104 in the direction of movement to limit the linear movement of the slide table. A button box 107 is installed on the side of machine unit 1 for starting and stopping the equipment. A pair of light curtains 108 are installed on the manual feeding side of the slide table 104 to provide safety protection for manual feeding.

[0058] A through hole is provided in the center of the slide table 104, and a corresponding through hole is also provided at the upper end of the machine frame 101 for the expansion unit 4 to pass through. A tooling sleeve 201 is fixedly provided at the upper end of the through hole in the center of the slide table 104. The tooling sleeve 201 has a hole in the center for placing the stator 202. The central hole of the tooling sleeve matches the outer diameter of the stator 202. At the same time, an angular positioning strip 204 is axially provided on the inner wall of the central hole of the tooling sleeve, which matches the axial groove provided on the outer side wall of the stator 202, so as to realize the angular positioning and fixation of the stator 202 when it is manually or automatically placed into the tooling sleeve. A rectangular notch 205 is axially opened on the outer circle of the tooling sleeve 201 to accommodate the body of the clamping cylinder 203. The clamping cylinder 202 is fixedly installed on the surface of the slide table with the pressure head on top. The body is embedded in the notch 205. The pressure head of the clamping cylinder can clamp the upper end of the stator 202 placed in the tooling sleeve 201 to prevent the stator from moving axially.

[0059] 2. Lifting Drive Operation Description: A two-stage lifting mechanism consisting of a primary cylinder and a secondary cylinder transmits power to the expansion unit via transmission components such as the connecting column 303 and the follower plate 309, enabling linear lifting and lowering of the expansion mechanism and providing power for the expansion action. The primary cylinder mainly enables the expansion unit to extend upwards into the stator's inner hole. Then, the secondary cylinder drives the expansion core upwards. During this upward movement, the expansion core's inclined platform and guide wheel engage in rolling motion, driving the expansion teeth to move radially outwards, inserting the tips of the expansion teeth into the stator slots.

[0060] Four parallel guide support rods are installed inside the machine tool. The top of the guide support rods is fixedly connected to the top of the machine tool frame, and the bottom of the guide support rods is fixedly connected to the bottom of the machine tool frame. The first-stage cylinder is fixedly installed on the bottom of the first-stage cylinder mounting plate. The cylinder extension rod extends upward and is threadedly connected to the bottom of the connecting column. The first-stage cylinder mounting plate has four through holes for the corresponding guide support rods 310 to pass through. The top of the first-stage cylinder mounting plate is fixedly connected to the bottom of the connecting column 303. The upper end of the connecting column 303 is fixedly connected to the connecting plate 304. The connecting plate 304 is fixedly connected to the second-stage cylinder mounting plate through the support column 305. The second-stage cylinder mounting plate is provided with... Four through holes are used for the guide support rod to pass through and achieve linear movement. The extension and retraction action of the cylinder rod of the first-stage cylinder can push the second-stage cylinder mounting plate to move up and down on the guide support rod. The second-stage cylinder is installed at the bottom of the second-stage cylinder mounting plate. The cylinder extension rod extends upward and is bolted to the bottom of the expansion core. The upper surface of the second-stage cylinder mounting plate and the lower surface of the follower plate are fixedly connected by a flange seat 308. The center of the flange seat 308 is a through hole for the extension rod of the second-stage cylinder to pass through. The follower plate 309 is also provided with four through holes for the guide support rod to pass through and achieve linear movement. A positioning sleeve is fixedly connected to the upper surface of the follower plate.

[0061] 3. The expansion process is as follows: the inclined platform 413 of the expansion core rolls in conjunction with the guide wheel of the expansion tooth 405 of the expansion sleeve. The inclined platform laterally pushes the expansion tooth radially, and the lifting force drives the expansion tooth to open radially, completing the expansion of the stator winding. The guide wheel 411 can convert sliding friction into rolling friction during the expansion process, which is beneficial to equipment stability and service life. The return spring 410 applies an inward pulling force to the expansion tooth during the radial retraction process, ensuring that the expansion tooth automatically resets after retraction.

[0062] Specifically: The lower part of the expansion sleeve is inserted into the positioning sleeve. The side wall of the positioning sleeve is provided with a radial threaded through hole. The tightening screw is pressed against the outer surface of the expansion sleeve through the threaded through hole to prevent the expansion sleeve from moving axially. The expansion sleeve is a hollow tubular structure. The expansion sleeve is provided with grooves 407 evenly distributed around its circumference. The grooves connect the inside and outside of the middle part of the side wall of the expansion sleeve. Lugs are fixed to both sides of one end of the groove on the outer wall of the expansion sleeve. The expansion teeth are placed in the grooves and have a certain gap with the sides of the grooves to facilitate the extension and retraction of the expansion teeth without resistance. The pin hole of the expansion teeth and the lugs are connected by a pin to form a hinge seat. The expansion teeth can rotate around the pin. The other end of the expansion tooth is placed inside the expansion sleeve body. A guide wheel is provided at the contact position between the other end of each expansion tooth and the expansion core. The guide wheel is installed on the guide wheel mounting hole. A return spring through hole is provided at this end of the expansion tooth. The return spring passes through the return spring through hole of each expansion tooth and is connected to form a ring device with a closing connection inside the expansion sleeve body. A pointed part is provided on the outwardly protruding end face of the expansion tooth. An expansion core is installed inside the expansion sleeve body. The expansion core is a stepped columnar structure with inclined platform between the steps. A guide sleeve is fixed to the top of the expansion sleeve body. The top of the guide sleeve is a conical structure.

[0063] The workflow and steps of this utility model are as follows:

[0064] The translation cylinder pushes the slide table out of the working position - the stator is manually loaded - the translation cylinder pulls the slide table into the working position - the clamping cylinder rotates 90° to press and fix the upper end face of the stator, limiting the axial movement of the stator - the first-stage cylinder rod extends to lift the second-stage cylinder and the expansion unit upwards until the expansion unit body extends into the stator hole - at this time, the second-stage cylinder rod extends to lift the expansion core upwards → the expansion core pushes the expansion teeth radially outwards through the lateral force of the inclined plate (the expansion teeth swing outwards around the hinge seat pin) → each expansion sleeve body has an expansion tooth in the groove, and the expansion tooth is inserted through the tip guide. The stator is expanded into the wedge-shaped slot of the stator. After expansion is complete, the secondary cylinder retracts, the expansion core moves downward, and the expansion teeth retract into the slot of the expansion sleeve under the radial tension of the return spring (the expansion teeth retract inward with the hinge seat pin as the center). The primary cylinder retracts, and the entire expansion unit moves downward and exits from the stator center hole, completing the expansion reset. The translation cylinder pushes the slide table out of the working position. The stator is manually unloaded and then loaded. The translation cylinder pulls the slide table into the working position. The clamping cylinder rotates 90° to axially clamp and fix the stator. The next stator expansion operation begins. Specifically:

[0065] 1. The stator achieves precise axial and angular positioning through a fixed unit.

[0066] 2. The lifting unit drives the expansion unit to rise, and the expansion core inclined platform pushes the expansion teeth to open, applying force to the winding to expand.

[0067] 3. After the expansion is completed, the return spring drives the expansion teeth to retract, the lifting unit falls back, the stator moves out, and one cycle is completed.

[0068] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A stator slot type automatic expansion tooling, characterized in that, include: The machine unit (1) includes a machine frame (101) and a movable slide (104) disposed thereon, the slide (104) being driven by a translation drive component; The stator fixing unit (2) is disposed on the slide table (104) and includes a tooling sleeve (201) for accommodating the stator (202) and a clamping component for clamping the stator; A radial expansion actuator is used to generate radial expansion motion under axial power drive. The lifting unit (3) is located inside the machine frame (101), and its power output end is connected to the radial expansion actuator to drive the radial expansion actuator to lift as a whole and provide it with the axial power. The working end of the radial expansion actuator can generate radial expansion motion under the axial power provided by the lifting unit (3), and can radially contract and reset under the action of the built-in elastic reset element.

2. The automatic stator slot expansion tooling according to claim 1, characterized in that, The radial expansion actuator adopts an expansion unit (4), including an expansion sleeve (403), an expansion core (412), and multiple expansion teeth (405); the expansion sleeve (403) is a hollow tubular structure, and multiple slots (407) extending through the length direction are evenly distributed on its outer wall circumference; a circular hole is opened in the middle of the bottom of the slot (407) to connect to the inner cavity of the expansion sleeve (403); the expansion teeth (405) are arranged in the slots (407), and each slot ( 407) corresponds to an expansion tooth (405); one end of the expansion tooth (405) is hinged to the outer wall of the expansion sleeve (403) through the hinge seat (406), and the other end of the expansion tooth (405) serves as the power input end and extends into the inner cavity of the expansion sleeve (403) through the round hole; the expansion core (412) is housed inside the expansion sleeve (403), and its upper part is provided with an inclined platform (413), which contacts and engages with the power input end of the expansion tooth (405).

3. The automatic stator slot expansion tooling according to claim 2, characterized in that, The built-in elastic reset element is a reset spring (410). The expansion tooth (405) is provided with a reset spring through hole (415). All the reset spring through holes (415) of the expansion teeth (405) are connected together by a reset spring (410). The reset spring (410) is connected end to end to form a ring, which is used to provide elastic tension to make the expansion tooth (405) radially reset. The power output end of the lifting unit (3) is connected to the expansion core (412) to drive its lifting and lowering; when the expansion core (412) rises, it pushes the power input end of the expansion tooth (405) through the inclined platform (413), forcing the expansion tooth (405) to open radially outward around the hinge point.

4. The automatic stator slot expansion tooling according to claim 2, characterized in that, The lifting unit (3) includes a primary lifting mechanism and a secondary lifting mechanism; the primary lifting mechanism includes a primary drive component (301) for driving the secondary lifting mechanism and the expansion unit (4) to move as a whole in the vertical direction; the secondary lifting mechanism includes a secondary drive component (306), whose power output end is connected to the expansion core (412) for driving the expansion core (412) to move relative to the expansion sleeve (403).

5. The automatic stator slot expansion tooling according to claim 4, characterized in that, The lifting unit (3) also includes multiple guide support rods (310) that are vertically fixed inside the machine frame (101). The primary lifting mechanism includes a primary mounting plate (302) connected to the piston rod of the primary drive component (301), and the primary mounting plate (302) is slidably sleeved on the guide support rod (310); The secondary lifting mechanism includes a secondary mounting plate (307) connected to the piston rod of the secondary drive component (306). The secondary mounting plate (307) is connected to the primary mounting plate (302) through a connecting structure and is slidably sleeved on the guide support rod (310).

6. The automatic stator slot expansion tooling according to claim 5, characterized in that, The expansion sleeve (403) is fixed to a follower plate (309) by a positioning sleeve (401). The follower plate (309) is fixedly connected to the secondary mounting plate (307) of the secondary lifting mechanism and is slidably sleeved on the guide support rod (310).

7. The automatic stator slot expansion tooling according to claim 2, characterized in that, The power input end of the expansion tooth (405) is provided with a guide wheel (411), and the guide wheel (411) is in rolling contact with the inclined platform (413) of the expansion core (412).

8. The automatic stator slot expansion tooling according to claim 1, characterized in that, The tooling sleeve (201) has an axially arranged angular positioning strip (204) on its inner wall, which is used to cooperate with the axial groove of the outer circular side wall of the stator (202) to achieve angular positioning.

9. The automatic stator slot expansion tooling according to claim 1, characterized in that, The translation drive component is a translation cylinder (105). The cylinder body of the translation cylinder (105) is fixed to the top surface of the machine frame (101), and the cylinder rod of the translation cylinder (105) is connected to the slide (104). The machine unit (1) also includes guide rails (103) arranged on both sides of the movement direction of the slide (104) and a stop (102) for limiting the stroke of the slide (104). The slide (104) is slidably connected to the guide rails (103). The center of the slide (104) and the corresponding position on the upper end of the machine frame (101) are provided with through holes for the radial expansion actuator to pass through.

10. The automatic stator slot expansion tooling according to claim 2, characterized in that, The top of the expansion sleeve (403) is fixedly connected to a guide sleeve (404) with a cone-shaped top. The bottom of the guide sleeve (404) is inserted into the inner cavity of the expansion sleeve (403), and the two are tightly fitted together. The guide sleeve (404) is provided with an axial limiting shoulder that cooperates with the inner cavity of the expansion sleeve (403).

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