Assembly tooling and process of stator fixing plate for new energy motor resolver

Abstract

This invention relates to the field of motor manufacturing and assembly technology, specifically to the assembly tooling and process for a resolver stator fixing plate of a new energy motor. The tooling includes a resolver sensor transported by a conveyor belt and a robotic arm positioned outside the conveyor belt. The end of the robotic arm is equipped with a universal fixture. The universal fixture includes a limiting part, a rotating tube sleeved outside the limiting part, and a clamping mechanism positioned outside the rotating tube. This invention achieves rapid self-adjustment and precise adaptation of the fixture through a single-drive, double-linkage structure. By driving the rotation of a single rotating tube, utilizing the slots on its outer wall and the guide grooves on the bottom rotating ring, and through the transmission via a lever and a protrusion, the single rotational input is decoupled into two actions: circumferential rigid locking of the rotating disk and radial fine-tuning of the moving gripper.

Description

Technical Field

[0001] This invention relates to the field of motor manufacturing and assembly technology, and more specifically, to the assembly tooling and process of the stator fixing plate of a new energy motor resolver. Background Technology

[0002] In the manufacturing of new energy drive motors, the assembly precision of the resolver directly determines the motor's control performance. Traditional separate resolvers require complex online electrical zero-point calibration during final assembly, a cumbersome and inefficient process. To address this, an integrated resolver sensor has been developed. This sensor pre-integrates the stator coils and mounting plate into a high-precision module before shipment, achieving a "calibration-free" design and significantly improving product consistency. While this design ensures precision entirely upfront, it places extremely high demands on the mechanical assembly process during final assembly. It is essential to ensure a stress-free, zero-interference precision coupling between the mounting plate and the motor end cover via locating pins and pin holes, and to maintain this perfect alignment during the final bolt tightening process.

[0003] Patent application number CN202511352367.4 discloses an intelligent assembly center for the rotor of a permanent magnet synchronous direct drive motor, including an assembly table. A first movable slide rail is fixedly installed at one end of the assembly table, and a second movable slide rail is fixedly installed at the other end of the assembly table. A camera is detachably installed on the other side of the assembly table. Through the coordinated use of two sets of electric sliders, two sets of electric telescopic rods, an assembly placement plate, a camera, and a device program, the processing and assembly position can be changed according to the permanent magnet synchronous direct drive motors of different sizes.

[0004] However, traditional assembly fixtures have poor versatility and low changeover efficiency because they require special fixtures for different models of resolver sensors or frequent changes of chucks. At the same time, because the clamping mechanism of traditional fixtures is large in radial or axial dimensions, when it attempts to place the workpiece into the shallow or narrow groove of the motor end cover, its body is very prone to mechanical interference with the edge of the groove. It often relies on additional auxiliary push rods or complex secondary positioning clamping, resulting in a cumbersome assembly path and ultimately restricting assembly accuracy and efficiency.

[0005] In view of this, we propose the assembly tooling and process for the stator fixing plate of the new energy motor resolver. Summary of the Invention

[0006] The purpose of this invention is to provide assembly tooling and process for the stator fixing plate of a new energy motor resolver. Through the single-drive double-linkage structure of the universal fixture, the fixture can achieve rapid self-adjustment and precise adaptation, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: The assembly fixture for the stator fixing plate of the new energy motor resolver includes a resolver sensor transported by a conveyor belt and a robotic arm set on the outside of the conveyor belt, the end of which is provided with a universal clamp. The universal clamp includes a limiting part, a rotating tube sleeved on the outside of the limiting part, and a clamping mechanism disposed on the outside of the rotating tube. The outer wall of the rotating tube is provided with two inclined grooves for guiding the clamping mechanism to descend and adjust the radial clamping range. The limiting part includes a rotating ring, a limiting ring sleeved outside the rotating ring, a pair of protrusions disposed on the inner wall of the limiting ring, and a number of limiting rods disposed on the outer side of the limiting ring. The outer wall of the rotating ring is provided with two guide grooves. In the above configuration, after the rotating ring rotates, it drives the protrusion to move along the guide groove, which in turn drives the limiting ring to move upward, thereby adjusting the position of several limiting rods; The clamping mechanism includes a lifting ring, a pair of levers disposed on the inner ring wall of the lifting ring, three rotating frames that rotate on the outer wall of the lifting ring, a rotating disk disposed below the rotating frames, a movable gripper that slides inside the rotating disk, and a connecting rod disposed between the movable gripper and the rotating frames. In the above configuration, after the rotating tube rotates, it drives the dial block to move along the dial groove, which in turn drives the lifting ring and the rotating frame to move downward. By changing the tilt angle of the connecting rod, the radial clamping position of the moving gripper is adjusted.

[0008] In the technical solution of the present invention, the resolver sensor includes a resolver stator and a fixing ring plate pressed into the outside of the resolver stator by an interference fit, and the robotic arm is fixedly connected to the bracket on the outside of the conveyor belt by bolts.

[0009] The above setup establishes an automated assembly system framework based on a conveyor line and a robotic arm, clearly defining the integrated resolver sensor, consisting of a resolver stator and a fixed ring plate, as the work object, and providing a target and path for the gripping and embedding operations of the general-purpose fixture.

[0010] In the technical solution of the present invention, the universal fixture further includes a driver, which includes a connecting bracket fixedly connected to the end of the robotic arm by bolts, a motor fixedly connected to the outer wall of the connecting bracket by bolts, a coupling coaxially connected to the output shaft of the motor, a rotating shaft snapped and fixed to the bottom end of the coupling, and a gear fixedly connected to the end of the rotating shaft by a pin. The connecting bracket has an L-shaped longitudinal section and a partition plate welded to its outer wall near the bottom.

[0011] The above setup provides the core drive and mounting foundation for the universal fixture. The driver transmits power to subsequent mechanisms via motors, gears, etc., while the connecting brackets and partitions provide a stable mounting platform for components such as the limiting parts, ensuring the overall structural rigidity.

[0012] In the technical solution of the present invention, the limiting part further includes a fixing rod fixedly connected to the bottom surface of the partition by bolts, a fixing base fixedly connected to the bottom end of the fixing rod by bolts, and a sealing ring plate fixedly connected to the top surface of the fixing base by screws. The annular outer wall of the fixing base is provided with several regularly distributed, through holes that are internal and external and have an inverted T-shaped longitudinal section. The bottom disc of the fixing base is provided with an annular groove near the edge.

[0013] In the technical solution of the present invention, the rotating ring is rotatably connected to the inner bottom surface of the fixed base, the guide groove is composed of an initial spiral segment and a remaining annular segment, the limiting ring is slidably connected to the outer side of the rotating ring, the protrusion is engaged with the inner wall of the limiting ring, the longitudinal section of the limiting rod is inverted T-shaped and the end is hemispherical, the limiting rod is slidably connected to the inside of the through hole, and a spring is sleeved on the outer side of the limiting rod. The two ends of the spring are respectively welded and fixed to the hole wall of the through hole and the inner end of the limiting ring.

[0014] The above settings constitute the precision locking logic of the limiting part, establishing a fixed benchmark for subsequent adjustments to the clamping mechanism.

[0015] In the technical solution of the present invention, the resolver sensor further includes a rotating part, the rotating part including a ring tooth that is snapped and fixed to the outer wall of the rotating tube and meshes with the gear, and two retaining rings integrally formed on the outer wall of the rotating tube. The rotating tube is rotatably connected to the inside of the connecting bracket and its bottom end is snapped and fixed to the rotating ring.

[0016] The above setup reveals the timing control principle of the rotating part. The rotation of the rotating tube, through the groove on its outer wall composed of annular and helical segments, cooperates with the guide groove to sequentially trigger two stages: the extension of the limit rod and the downward movement of the lifting ring driven by the lever, thus achieving precise decoupling and sequential control of the action.

[0017] In the technical solution of the present invention, the lifting ring is slidably connected to the outer wall of the rotating tube, the dial block is fixedly engaged with the inner wall of the lifting ring, the rotating frame is rotatably connected to the outer wall of the lifting ring, and the dial groove on the rotating tube is composed of an initial annular segment and the remaining spiral segment.

[0018] In the technical solution of the present invention, the rotating disk is rotatably connected to the outer wall of the fixed base. The outer wall of the rotating disk is provided with a through groove. The top surface of the rotating disk is provided with a limiting slide groove that communicates with the through groove. The bottom surface of the rotating disk is integrally formed with an arc-shaped strip that rotates inside the annular groove on the bottom disc of the fixed base. A transverse frame slides on the top surface of the rotating disk. The upper and lower ends of the connecting rod are respectively hinged to the inside of the rotating frame and the transverse frame.

[0019] In the technical solution of the present invention, the movable gripper includes a horizontal bar that slides in the through groove, a clamping rod that is welded and fixed to the bottom surface of the outer end of the horizontal bar, a clamping head that is threaded to the bottom end of the clamping rod, and a protruding rod that is snapped and fixed to the top surface of the inner end of the horizontal bar and is fixedly connected to the transverse frame by bolts.

[0020] The above setup illustrates the gripping execution mechanism of the clamping mechanism. The downward movement of the lifting ring pushes the transverse frame through the rotating frame and connecting rod, driving the moving gripper to slide radially on the locked rotating disk, so that the gripping head precisely matches the threaded hole of the fixed ring plate, ultimately achieving reliable gripping and flexible adaptation.

[0021] On the other hand, the present invention also provides an assembly process for a new energy motor resolver stator fixing plate, which, using the above-mentioned assembly fixture for the new energy motor resolver stator fixing plate, includes the following steps: S1. First, perform pre-adjustment and loading of the general fixture; the operator identifies the distribution circle diameter and circumferential angle of the threaded holes on the fixed ring plate of the resolver sensor according to the model of the resolver sensor in the current production batch, and manually adjusts the moving jaws in the clamping mechanism to change the radial position of each clamping head on the rotating disk so that its distribution is pre-aligned with the threaded holes of the fixed ring plate; at the same time, the conveyor belt transports the resolver sensor to the loading station within the working range of the robotic arm; S2. Subsequently, the circumferential locking of the rotating disk is performed; the robotic arm positions the universal gripper above the resolver sensor in preparation for gripping, the driver is started, and the motor drives the rotating shaft and gear to rotate through the coupling. The gear meshes with the ring teeth, driving the rotating tube to start rotating; the bottom end of the rotating tube is locked and fixed to the rotating ring, thus driving the rotating ring to rotate synchronously. S3. The initial spiral section of the guide groove on the outer wall of the rotating ring contacts the protrusion on the inner wall of the limiting ring. Under the guidance of the spiral groove, the protrusion drives the entire limiting ring to move upward and pushes all the limiting rods to overcome the spring force and extend outward synchronously along the through hole on the fixed base until the ends of each limiting rod are tightly against the inner wall of the rotating disk, thereby completely locking and fixing the rotating disk in the circumferential direction to prevent it from rotating in subsequent adjustments. At this stage, the initial annular section of the groove on the outer wall of the rotating tube contacts the block on the lifting ring, and only relative sliding occurs, without generating axial drive. Therefore, the lifting ring and the clamping mechanism connected to it remain stationary. S4. Next, perform radial fine adjustment of the moving gripper; the driver continues to run, the rotating tube continues to rotate, and when the spiral segment of the guide groove ends and the protrusion enters its remaining annular segment, the limiting ring stops axial movement and remains in a high-position locked state; at the same time, the rotation of the rotating tube causes the spiral segment of the dialing groove to begin to contact the dialing block; and the dialing block drives the lifting ring to move axially downward along the outer wall of the rotating tube. S5. The downward movement of the lifting ring causes the rotating frame on its outer wall to move downward synchronously; the rotating frame pushes the transverse frame to slide on the top surface of the rotating disk through the connecting rod; since the rotating disk has been circumferentially locked by the limiting rod, the linear motion of the transverse frame is converted into driving the moving jaw to make precise radial movement in the through slot through the protruding rod, thereby adjusting the radial position of each clamping head to be perfectly matched with the precise coordinates of the threaded hole on the fixed ring plate. S6. Next, grasping and clamping are performed; after the position of the moving gripper is adjusted, the robotic arm precisely lowers the universal fixture so that all gripping heads are accurately inserted into the corresponding threaded holes of the fixed ring plate; the driver controls the motor to reverse briefly and slightly, so that the moving gripper produces a slight radial contraction, and uses the reliable mechanical interference and friction between the gripping head and the wall of the threaded hole to firmly grasp the resolver sensor. S7. Next, the assembly, embedding, and final fastening are performed. The robotic arm moves the gripped resolver sensor to directly above the motor end cover to be assembled. Through precise position control of the robotic arm, the resolver stator and the fixed ring plate are smoothly and vertically embedded into their corresponding mounting grooves along the positioning pins on the motor end cover, ensuring stress-free contact of the positioning surfaces. Subsequently, the driver controls the universal fixture to release its grip on the fixed ring plate, and the robotic arm moves away. S8. Finally, the preset multi-axis automatic bolt tightening machine passes the fastening bolts through the mounting holes of the fixing ring plate and screws them into the threaded bottom holes of the motor end cover using the set tightening strategy, thus completing the final rigid connection and sealing between the resolver stator fixing plate and the motor end cover.

[0022] Compared with the prior art, the beneficial effects of the present invention are: 1. The assembly tooling and process of the stator fixing plate of the new energy motor resolver achieves rapid self-adjustment and precise adaptation of the fixture through the single-drive double-linkage structure of the universal fixture. By driving the rotation of a single rotating tube, the groove on its outer wall and the guide groove on the bottom rotating ring are used to drive the single rotation input through the pull block and the protrusion respectively. This decouples the single rotation input into two actions: the circumferential rigid locking of the rotating disk and the radial fine adjustment of the moving jaw. After manual pre-adjustment, the universal fixture can adapt to the thread hole distribution of different models of fixing ring plates without replacing the fixture body, thus improving the versatility of the tooling and the assembly efficiency.

[0023] 2. The assembly tooling and process of the stator fixing plate of the new energy motor resolver, through the standardized process of pre-adjustment, self-locking, fine adjustment, gripping and embedding, can automatically complete the benchmark locking and coordinate fine adjustment. It directly uses the threaded hole of the workpiece itself as the gripping benchmark, realizing high-precision and non-destructive gripping, simplifying the assembly action into a continuous movement, and improving the positioning accuracy and the stability of the assembly process. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the resolver sensor in this invention; Figure 3 This is a schematic diagram of the general-purpose clamp in this invention; Figure 4 This is a partial structural diagram of the universal fixture in this invention; Figure 5 This is a schematic diagram of the driver structure in this invention; Figure 6 This is a cross-sectional schematic diagram of the limiting part in this invention; Figure 7 For the present invention Figure 6 An enlarged schematic diagram of part A in the middle; Figure 8 This is a partial cross-sectional schematic diagram of the limiting part in this invention; Figure 9 This is a partial structural diagram of the limiting part in the present invention; Figure 10 This is a schematic diagram of the rotating part in this invention; Figure 11 This is a schematic diagram of the clamping mechanism in this invention; Figure 12 This is a cross-sectional schematic diagram of the lifting ring structure in this invention; Figure 13 This is a cross-sectional schematic diagram of the rotating disk in this invention; Figure 14 This is a partial structural diagram of the clamping mechanism in this invention; Figure 15 This is a schematic diagram of the movable gripper structure in this invention; Explanation of reference numerals in the attached figures: 100. Resolver sensor; 110. Resolver stator; 120. Fixed ring plate; 200. Robotic arm; 300. General-purpose clamp; 310. Driver; 311. Connecting bracket; 312. Motor; 313. Coupling; 314. Shaft; 315. Gear; 316. Partition; 320. Limiting part; 321. Fixing rod; 322. Fixing base; 3220. Through hole; 3221. Annular groove; 323. Sealing ring plate; 324. Rotating ring; 3240. Guide groove; 325. Limiting ring; 326. Protrusion; 327. Limiting rod; 328. Spring; 33 0. Rotating part; 331. Rotating tube; 3310. Slot; 332. Ring tooth; 333. Retaining ring; 340. Clamping mechanism; 341. Lifting ring; 342. Slot; 343. Rotating frame; 344. Rotating disk; 3440. Through slot; 3441. Limiting slide groove; 3442. Arc-shaped bar; 345. Moving gripper; 3450. Crossbar; 3451. Clamping rod; 3452. Clamping head; 3453. Protruding rod; 346. Horizontal moving frame; 347. Connecting rod. Detailed Implementation

[0025] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0026] Please see Figures 1-2 As shown, this embodiment provides the following technical solution: The assembly tooling for the stator fixing plate of the new energy motor resolver includes a resolver sensor 100 transported by a conveyor belt and a robotic arm 200 set on the outside of the conveyor belt. The end of the robotic arm 200 is provided with a universal clamp 300. Specifically, the resolver sensor 100 includes a resolver stator 110 and a fixing ring plate 120 pressed into the outside of the resolver stator 110 by an interference fit. The robotic arm 200 is fixedly connected to the bracket on the outside of the conveyor belt by bolts.

[0027] Furthermore, the robotic arm 200 positions the universal gripper 300 above the resolver sensor 100 for grasping movement and subsequent assembly embedding.

[0028] The above setup constructs an automated assembly system framework based on the conveyor line and robotic arm 200, and clarifies the integrated resolver sensor 100, which consists of resolver stator 110 and fixed ring plate 120, as the work object, providing a target and path for the gripping and embedding operations of the general-purpose fixture 300.

[0029] Please see Figures 3-5As shown, in this embodiment, the universal fixture 300 includes a driver 310, a limiting part 320 sleeved on the outside of the limiting part 320, a rotating tube 331 and a clamping mechanism 340 disposed on the outside of the rotating tube 331, and the resolver sensor 100 also includes the rotating part 330. Specifically, the driver 310 includes a connecting bracket 311 bolted to the end of the robotic arm 200, a motor 312 bolted to the outer wall of the connecting bracket 311, a coupling 313 coaxially connected to the output shaft of the motor 312, a rotating shaft 314 snapped to the bottom of the coupling 313, and a gear 315 bolted to the end of the rotating shaft 314. The connecting bracket 311 has an L-shaped longitudinal section and a partition 316 welded to its outer wall near the bottom.

[0030] Furthermore, the connecting bracket 311 is used to ensure that the universal clamp 300 can move stably with the robotic arm 200. After the motor 312 is started, it drives the rotating shaft 314 and the gear 315 at its end to rotate through the coupling 313. The partition 316 is used to provide a fixed platform for the structure in the limiting part 320.

[0031] The above setup provides the core drive and mounting foundation for the universal fixture 300. The driver 310 transmits power to subsequent mechanisms via the motor 312, gear 315, etc., while the connecting bracket 311 and partition 316 provide a stable mounting platform for components such as the limiting part 320, ensuring the overall structural rigidity.

[0032] Please see Figures 6-9 As shown, in this embodiment, the limiting part 320 includes a rotating ring 324, a limiting ring 325 sleeved outside the rotating ring 324, a pair of protrusions 326 disposed on the inner wall of the limiting ring 325, and a plurality of limiting rods 327 disposed on the outer side of the limiting ring 325. The outer wall of the rotating ring 324 is provided with two guide grooves 3240. After the rotating ring 324 rotates, it drives the protrusions 326 to move along the guide grooves 3240, thereby causing the limiting ring 325 to move upward, and adjusting the position of the plurality of limiting rods 327.

[0033] Specifically, the limiting part 320 also includes a fixing rod 321 fixedly connected to the bottom surface of the partition plate 316 by bolts, a fixing base 322 fixedly connected to the bottom end of the fixing rod 321 by bolts, and a sealing ring plate 323 fixedly connected to the top surface of the fixing base 322 by screws. The annular outer wall of the fixing base 322 has several regularly distributed, through holes 3220 that are internal and external and have an inverted T-shaped longitudinal section. The bottom disc of the fixing base 322 has an annular groove 3221 near the edge.

[0034] Furthermore, the rotating ring 324 is rotatably connected to the inner bottom surface of the fixed base 322, the guide groove 3240 is composed of an initial spiral segment and the remaining annular segment, the limiting ring 325 is slidably connected to the outer side of the rotating ring 324, the protrusion 326 is engaged with the inner wall of the limiting ring 325, the longitudinal section of the limiting rod 327 is inverted T-shaped and the end is hemispherical, the limiting rod 327 is slidably connected to the inside of the through hole 3220, and a spring 328 is sleeved on the outer side of the limiting rod 327. The two ends of the spring 328 are respectively welded and fixed to the hole wall of the through hole 3220 and the inner end of the limiting ring 325.

[0035] Furthermore, after the rotating ring 324 rotates, the initial spiral segment of the guide groove 3240 on the outer wall contacts the protrusion 326 on the inner wall of the limiting ring 325. Under the guidance of the spiral groove, the protrusion 326 drives the entire limiting ring 325 to move upward, and pushes all the limiting rods 327 to overcome the elastic force of the spring 328 and extend outward synchronously along the through hole 3220 on the fixed base 322, thereby limiting the position of the internal structure of the clamping mechanism 340.

[0036] The above settings constitute the precision locking logic of the limiting part 320, establishing a fixed benchmark for the subsequent adjustment of the clamping mechanism 340.

[0037] Please see Figure 10 As shown, in this embodiment, the rotating part 330 includes a ring tooth 332 that is snapped and fixed to the outer wall of the rotating tube 331 and meshes with the gear 315, and two retaining rings 333 integrally formed on the outer wall of the rotating tube 331. The rotating tube 331 is rotatably connected to the inside of the connecting bracket 311 and its bottom end is snapped and fixed to the rotating ring 324. The outer wall of the rotating tube 331 is provided with two inclined grooves 3310 for guiding the clamping mechanism 340 to descend and adjust the radial clamping range.

[0038] Specifically, during the stage when all the limit rods 327 extend outward synchronously along the through holes 3220 on the fixed base 322; the initial annular segment of the groove 3310 on the outer wall of the rotating tube 331 contacts the lever 342 on the lifting ring 341, and only relative sliding occurs, without generating axial drive, so the lifting ring 341 and the clamping mechanism 340 connected to it remain stationary.

[0039] Furthermore, as the driver 310 continues to operate, the rotating tube 331 continues to rotate. When the spiral segment of the guide groove 3240 finishes its stroke and the protrusion 326 enters its remaining annular segment, the limiting ring 325 stops axial movement and remains in a high-position locked state. At the same time, the rotation of the rotating tube 331 causes the spiral segment of the dial groove 3310 to begin contacting the dial block 342. The dial block 342 drives the lifting ring 341 to move axially downward along the outer wall of the rotating tube 331.

[0040] The above configuration reveals the timing control principle of the rotating part 330. The rotation of the rotating tube 331, through the groove 3310 composed of annular and spiral segments on its outer wall, cooperates with the guide groove 3240 to sequentially trigger two stages: the extension of the limit rod 327 and the downward movement of the lifting ring 341 driven by the toggle block 342. This achieves precise decoupling and sequential control of the action.

[0041] Please see Figures 11-15 As shown, in this embodiment, the clamping mechanism 340 includes a lifting ring 341, a pair of levers 342 disposed on the inner ring wall of the lifting ring 341, three rotating frames 343 rotating on the outer wall of the lifting ring 341, a rotating disk 344 disposed below the rotating frames 343, a movable gripper 345 sliding inside the rotating disk 344, and a connecting rod 347 disposed between the movable gripper 345 and the rotating frames 343. After the rotating tube 331 rotates, it drives the levers 342 to move along the lever groove 3310, causing the lifting ring 341 and the rotating frames 343 to move downward. By changing the tilt angle of the connecting rod 347, the radial clamping position of the movable gripper 345 is adjusted.

[0042] Specifically, the lifting ring 341 is slidably connected to the outer wall of the rotating tube 331, the lever 342 is snapped and fixed to the inner wall of the lifting ring 341, the rotating frame 343 is rotatably connected to the outer wall of the lifting ring 341, and the lever groove 3310 on the rotating tube 331 is composed of an initial annular segment and the remaining spiral segment.

[0043] Furthermore, the rotating disk 344 is rotatably connected to the outer wall of the fixed base 322. The outer wall of the rotating disk 344 is provided with a through groove 3440. The top surface of the rotating disk 344 is provided with a limiting slide groove 3441 that communicates with the through groove 3440. The bottom surface of the rotating disk 344 is integrally formed with an arc-shaped strip 3442 that rotates inside the annular groove 3221 on the bottom disc of the fixed base 322. A transverse frame 346 slides on the top surface of the rotating disk 344. The upper and lower ends of the connecting rod 347 are respectively hinged to the inside of the rotating frame 343 and the transverse frame 346.

[0044] Furthermore, the movable gripper 345 includes a crossbar 3450 that slides within the through groove 3440, a gripping rod 3451 that is welded and fixed to the bottom surface of the outer end of the crossbar 3450, a gripping head 3452 that is threaded to the bottom end of the gripping rod 3451, and a protruding rod 3453 that is snapped and fixed to the top surface of the inner end of the crossbar 3450 and is fixedly connected to the transverse frame 346 by bolts.

[0045] Furthermore, before the assembly work begins, the operator identifies the distribution circle diameter and circumferential angle of the threaded holes on the fixed ring plate 120 of the current production batch of the resolver sensor 100, and manually adjusts the moving jaws 345 in the clamping mechanism 340 to change the radial position of each clamping head 3452 on the rotating disk 344 so that its distribution is pre-aligned with the threaded holes of the fixed ring plate 120.

[0046] Furthermore, after all the limiting rods 327 overcome the elastic force of the spring 328, they extend outward synchronously along the through hole 3220 on the fixed base 322. The ends of each limiting rod 327 then tightly abut against the inner wall of the rotating disk 344, thereby completely locking and fixing the rotating disk 344 in the circumferential direction and preventing it from rotating during subsequent adjustments.

[0047] Furthermore, the downward movement of the lifting ring 341 causes the rotating frame 343 on its outer wall to move downward synchronously; the rotating frame 343 pushes the transverse frame 346 to slide on the top surface of the rotating disk 344 through the connecting rod 347; since the rotating disk 344 has been circumferentially locked by the limiting rod 327, the linear motion of the transverse frame 346 is converted into driving the moving gripper 345 to make precise radial movement in the through groove 3440 through the protruding rod 3453, thereby adjusting the radial position of each gripping head 3452 to perfectly match the precise coordinates of the threaded hole on the fixed ring plate 120.

[0048] Furthermore, after the position of the moving gripper 345 is adjusted, the robotic arm 200 precisely lowers the universal fixture 300, ensuring that all gripping heads 3452 are accurately inserted into the corresponding threaded holes of the fixed ring plate 120. The driver 310 controls the motor 312 to perform a short-term, small-amplitude reverse rotation, causing the moving gripper 345 to produce a slight radial contraction. Utilizing the reliable mechanical interference and friction between the gripping heads 3452 and the wall of the threaded hole, the resolver sensor 100 is securely gripped. Subsequently, the gripping heads 3452 can be replaced periodically as they wear out during prolonged operation.

[0049] The above configuration describes the gripping execution mechanism of the clamping mechanism 340. The lifting ring 341 moves downward and pushes the transverse frame 346 through the rotating frame 343 and the connecting rod 347, driving the moving gripper 345 to slide radially on the locked rotating disk 344, so that the gripping head 3452 accurately matches the threaded hole of the fixed ring plate 120, ultimately achieving reliable gripping and flexible adaptation.

[0050] The assembly process of the new energy motor resolver stator fixing plate of the present invention, using the above-mentioned assembly tooling for the new energy motor resolver stator fixing plate, includes the following steps: S1. First, the general fixture 300 is pre-adjusted and loaded. According to the model of the resolver sensor 100 in the current production batch, the operator identifies the distribution circle diameter and circumferential angle of the threaded holes on the fixed ring plate 120, and manually adjusts the moving jaws 345 in the clamping mechanism 340 to change the radial position of each clamping head 3452 on the rotating disk 344, so that its distribution is pre-aligned with the threaded holes of the fixed ring plate 120. At the same time, the conveyor belt transports the resolver sensor 100 to the loading station within the working range of the robotic arm 200. S2. Subsequently, the circumferential locking of the rotating disk 344 is performed; the robotic arm 200 positions the universal gripper 300 above the resolver sensor 100 in preparation for gripping, and starts the driver 310. The motor 312 drives the rotating shaft 314 and gear 315 to rotate through the coupling 313. The gear 315 meshes with the ring gear 332, driving the rotating tube 331 to start rotating; the bottom end of the rotating tube 331 is locked and fixed to the rotating ring 324, thereby driving the rotating ring 324 to rotate synchronously. S3. The initial spiral segment of the guide groove 3240 on the outer wall of the rotating ring 324 contacts the protrusion 326 on the inner wall of the limiting ring 325. Under the guidance of the spiral groove, the protrusion 326 drives the entire limiting ring 325 to move upward and pushes all the limiting rods 327 to overcome the elastic force of the spring 328 and extend outward synchronously along the through hole 3220 on the fixed base 322 until the ends of each limiting rod 327 are tightly against the inner wall of the rotating disk 344, thereby completely locking and fixing the rotating disk 344 in the circumferential direction to prevent it from rotating in subsequent adjustments. At this stage, the initial annular segment of the groove 3310 on the outer wall of the rotating tube 331 contacts the lever 342 on the lifting ring 341 and only slides relative to each other without generating axial drive. Therefore, the lifting ring 341 and the clamping mechanism 340 connected to it remain stationary. S4. Next, the radial fine adjustment of the moving gripper 345 is performed; the driver 310 continues to run, and the rotating tube 331 continues to rotate. When the spiral segment of the guide groove 3240 finishes its stroke and the protrusion 326 enters its remaining annular segment, the limiting ring 325 stops axial movement and remains in a high-position locked state; at the same time, the rotation of the rotating tube 331 causes the spiral segment of the dial groove 3310 to begin to contact the dial block 342; and the dial block 342 drives the lifting ring 341 to move axially downward along the outer wall of the rotating tube 331. S5, the downward movement of the lifting ring 341 causes the rotating frame 343 on its outer wall to move downward synchronously; the rotating frame 343 pushes the transverse frame 346 to slide on the top surface of the rotating disk 344 through the connecting rod 347; since the rotating disk 344 has been circumferentially locked by the limiting rod 327, the linear motion of the transverse frame 346 is converted into driving the moving gripper 345 to make precise radial movement in the through groove 3440 through the protrusion rod 3453, thereby adjusting the radial position of each gripping head 3452 to be completely matched with the precise coordinates of the threaded hole on the fixed ring plate 120; S6. Next, gripping and clamping are performed. After the position of the moving gripper 345 is adjusted, the robotic arm 200 precisely lowers the universal fixture 300 so that all gripping heads 3452 are accurately inserted into the corresponding threaded holes of the fixed ring plate 120. The driver 310 controls the motor 312 to reverse briefly and slightly, so that the moving gripper 345 produces a slight radial contraction. The reliable mechanical interference and friction between the gripping heads 3452 and the wall of the threaded hole are used to firmly grip the resolver sensor 100. S7. Next, the assembly, embedding, and final fastening are performed. The robotic arm 200 moves the gripped resolver sensor 100 to directly above the motor end cover to be assembled. Through precise position control of the robotic arm, the resolver stator 110 and the fixed ring plate 120 are smoothly and vertically embedded into their corresponding mounting grooves along the positioning pins on the motor end cover, ensuring stress-free contact of the positioning surfaces. Subsequently, the driver 310 controls the universal clamp 300 to release its grip on the fixed ring plate 120, and the robotic arm 200 moves away. S8. Finally, the preset multi-axis automatic bolt tightening machine passes the fastening bolts through the mounting holes of the fixing ring plate 120 and screws them into the threaded bottom holes of the motor end cover using the set tightening strategy, thus completing the final rigid connection and sealing between the resolver stator fixing plate and the motor end cover.

[0051] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. An assembly fixture for a resolver stator fixing plate of a new energy motor, comprising a resolver sensor transported by a conveyor belt and a robotic arm disposed on the outside of the conveyor belt, characterized in that: The end of the robotic arm is equipped with a universal clamp; The universal clamp includes a limiting part, a rotating tube sleeved on the outside of the limiting part, and a clamping mechanism disposed on the outside of the rotating tube. The outer wall of the rotating tube is provided with two inclined grooves for guiding the clamping mechanism to descend and adjust the radial clamping range. The limiting part includes a rotating ring, a limiting ring sleeved outside the rotating ring, a pair of protrusions disposed on the inner wall of the limiting ring, and a number of limiting rods disposed on the outer side of the limiting ring. The outer wall of the rotating ring is provided with two guide grooves. After the rotating ring rotates, it drives the protrusions to move along the guide grooves, thereby driving the limiting ring to move upward and adjusting the position of the number of limiting rods. The clamping mechanism includes a lifting ring, a pair of levers disposed on the inner ring wall of the lifting ring, three rotating frames that rotate on the outer wall of the lifting ring, a rotating disk disposed below the rotating frames, a movable gripper that slides inside the rotating disk, and a connecting rod disposed between the movable gripper and the rotating frames. After the rotating tube rotates, it drives the dial block to move along the dial groove, which in turn drives the lifting ring and the rotating frame to move down. By changing the tilt angle of the connecting rod, the radial clamping position of the moving jaw is adjusted.

2. The assembly tooling for the stator fixing plate of the new energy motor resolver according to claim 1, characterized in that: The resolver sensor includes a resolver stator and a fixing ring plate pressed into the outside of the resolver stator by an interference fit. The robotic arm is fixedly connected to a bracket on the outside of the conveyor belt by bolts.

3. The assembly tooling for the stator fixing plate of the new energy motor resolver according to claim 2, characterized in that: The universal fixture also includes a driver, which includes a connecting bracket bolted to the end of the robotic arm, a motor bolted to the outer wall of the connecting bracket, a coupling coaxially connected to the output shaft of the motor, a rotating shaft snapped to the bottom of the coupling, and a gear bolted to the end of the rotating shaft. The connecting bracket has an L-shaped longitudinal section and a partition welded to its outer wall near the bottom.

4. The assembly tooling for the stator fixing plate of the new energy motor resolver according to claim 3, characterized in that: The limiting part also includes a fixing rod fixedly connected to the bottom surface of the partition by bolts, a fixing base fixedly connected to the bottom end of the fixing rod by bolts, and a sealing ring plate fixedly connected to the top surface of the fixing base by screws. The annular outer wall of the fixing base has several regularly distributed, through holes that are internal and external and have an inverted T-shaped longitudinal section. The bottom disc of the fixing base has an annular groove near the edge.

5. The assembly tooling for the stator fixing plate of the new energy motor resolver according to claim 4, characterized in that: The rotating ring is rotatably connected to the inner bottom surface of the fixed base. The guide groove consists of an initial spiral segment and a remaining annular segment. The limiting ring is slidably connected to the outer side of the rotating ring. The protrusion is engaged with the inner wall of the limiting ring. The longitudinal section of the limiting rod is inverted T-shaped and the end is hemispherical. The limiting rod is slidably connected to the inside of the through hole. A spring is sleeved on the outer side of the limiting rod. The two ends of the spring are welded and fixed to the hole wall of the through hole and the inner end of the limiting ring, respectively.

6. The assembly tooling for the stator fixing plate of the new energy motor resolver according to claim 5, characterized in that: The resolver sensor also includes a rotating part, which includes a ring tooth that is snapped and fixed to the outer wall of the rotating tube and meshes with the gear, and two retaining rings integrally formed on the outer wall of the rotating tube. The rotating tube is rotatably connected to the inside of the connecting bracket and its bottom end is snapped and fixed to the rotating ring.

7. The assembly tooling for the stator fixing plate of the new energy motor resolver according to claim 6, characterized in that: The lifting ring is slidably connected to the outer wall of the rotating tube, the dial block is engaged and fixed to the inner wall of the lifting ring, the rotating frame is rotatably connected to the outer wall of the lifting ring, and the dial groove on the rotating tube consists of an initial annular segment and the remaining spiral segment.

8. The assembly tooling for the stator fixing plate of the new energy motor resolver according to claim 7, characterized in that: The rotating disk is rotatably connected to the outer wall of the fixed base. The outer wall of the rotating disk has a through groove. The top surface of the rotating disk has a limiting slide groove that communicates with the through groove. The bottom surface of the rotating disk is integrally formed with an arc-shaped strip that rotates inside the annular groove on the bottom disc of the fixed base. A transverse frame slides on the top surface of the rotating disk. The upper and lower ends of the connecting rod are respectively hinged to the inside of the rotating frame and the transverse frame.

9. The assembly tooling for the stator fixing plate of the new energy motor resolver according to claim 8, characterized in that: The movable gripper includes a horizontal bar that slides in the through groove, a clamping rod welded and fixed to the bottom surface of the outer end of the horizontal bar, a clamping head threaded to the bottom end of the clamping rod, and a protruding rod snapped and fixed to the top surface of the inner end of the horizontal bar and fixed to the transverse frame by bolts.

10. An assembly process for a resolver stator fixing plate of a new energy motor, using the assembly tooling for the resolver stator fixing plate of a new energy motor as described in claim 9, characterized in that, Includes the following steps: S1. First, perform pre-adjustment and loading of the general fixture; the operator identifies the distribution circle diameter and circumferential angle of the threaded holes on the fixed ring plate of the resolver sensor according to the model of the resolver sensor in the current production batch, and manually adjusts the moving jaws in the clamping mechanism to change the radial position of each clamping head on the rotating disk so that its distribution is pre-aligned with the threaded holes of the fixed ring plate; at the same time, the conveyor belt transports the resolver sensor to the loading station within the working range of the robotic arm; S2. Subsequently, the circumferential locking of the rotating disk is performed; the robotic arm positions the universal gripper above the resolver sensor in preparation for gripping, the driver is started, and the motor drives the rotating shaft and gear to rotate through the coupling. The gear meshes with the ring teeth, driving the rotating tube to start rotating; the bottom end of the rotating tube is locked and fixed to the rotating ring, thus driving the rotating ring to rotate synchronously. S3. The initial spiral section of the guide groove on the outer wall of the rotating ring contacts the protrusion on the inner wall of the limiting ring. Under the guidance of the spiral groove, the protrusion drives the entire limiting ring to move upward and pushes all the limiting rods to overcome the spring force and extend outward synchronously along the through hole on the fixed base until the ends of each limiting rod are tightly against the inner wall of the rotating disk, thereby completely locking and fixing the rotating disk in the circumferential direction to prevent it from rotating in subsequent adjustments. At this stage, the initial annular section of the groove on the outer wall of the rotating tube contacts the block on the lifting ring, and only relative sliding occurs, without generating axial drive. Therefore, the lifting ring and the clamping mechanism connected to it remain stationary. S4. Next, perform radial fine adjustment of the moving gripper; the driver continues to run, the rotating tube continues to rotate, and when the spiral segment of the guide groove ends and the protrusion enters its remaining annular segment, the limiting ring stops axial movement and remains in a high-position locked state; at the same time, the rotation of the rotating tube causes the spiral segment of the dialing groove to begin to contact the dialing block; and the dialing block drives the lifting ring to move axially downward along the outer wall of the rotating tube. S5. The downward movement of the lifting ring causes the rotating frame on its outer wall to move downward synchronously; the rotating frame pushes the transverse frame to slide on the top surface of the rotating disk through the connecting rod; since the rotating disk has been circumferentially locked by the limiting rod, the linear motion of the transverse frame is converted into driving the moving jaw to make precise radial movement in the through slot through the protruding rod, thereby adjusting the radial position of each clamping head to be perfectly matched with the precise coordinates of the threaded hole on the fixed ring plate. S6. Next, grasping and clamping are performed; after the position of the moving gripper is adjusted, the robotic arm precisely lowers the universal fixture so that all gripping heads are accurately inserted into the corresponding threaded holes of the fixed ring plate; the driver controls the motor to reverse, so that the moving gripper retracts radially, and uses the reliable mechanical interference and friction between the gripping head and the wall of the threaded hole to firmly grasp the resolver sensor. S7. Next, the assembly, embedding, and final fastening are performed. The robotic arm moves the gripped resolver sensor to directly above the motor end cover to be assembled. Through precise position control of the robotic arm, the resolver stator and the fixed ring plate are smoothly and vertically embedded into their corresponding mounting grooves along the positioning pins on the motor end cover, ensuring stress-free contact of the positioning surfaces. Subsequently, the driver controls the universal fixture to release its grip on the fixed ring plate, and the robotic arm moves away. S8. Finally, the preset multi-axis automatic bolt tightening machine passes the fastening bolts through the mounting holes of the fixing ring plate and screws them into the threaded bottom holes of the motor end cover using the set tightening strategy, thus completing the final rigid connection and sealing between the resolver stator fixing plate and the motor end cover.

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