A stator coil winding mechanism suitable for a stator coil with end-start winding

Abstract

A stator coil winding mechanism suitable for the end-of-tail line is located at both ends, which comprises a winding seat assembly, a clamping assembly and a locking assembly. The winding seat assembly comprises a rotating device, a mounting seat, a placing ring and a tail line winding assembly. The tail line winding assembly comprises a supporting column, a mounting block, a winding column assembly, a moving plate and a movable piece. The mounting block is provided with a first through hole. The winding column assembly comprises a winding shaft. One end of the winding shaft is connected with the moving plate, and the other end extends out of the first through hole. The moving plate is connected with the winding shaft and the movable piece. The clamping assembly comprises a third cylinder and a clamping jaw cylinder. The clamping jaw cylinder clamps and moves the moving plate, so that the winding shaft is retracted into the first through hole, and the wire originally wound on the winding shaft is also automatically detached, realizing the rapid unloading of the tail coil. At the same time, due to the multiple winding shafts, the size and type of the tail line can be wound, improving the applicability.

Description

Technical Field

[0001] This invention relates to the field of winding device technology, and in particular to a stator coil winding mechanism suitable for use with the starter and tail wires located at both ends. Background Technology

[0002] A coil typically refers to a loop of wire winding. Common applications include motors, inductors, transformers, and loop antennas. It is generally made by winding individual wires together, with the wires insulated from each other. A stator winding refers to the winding mounted on the stator. Existing stator coils include... Figure 9 As shown, the coil frame 100 includes a ring-shaped body 110 and a plurality of winding posts 120 disposed on the inner sidewall of the body 110. The starting wire and the ending wire of the coil frame 100 are located at opposite ends of the coil frame 100. During winding, the wire is first wound on the starting end, then inserted into the body 110 to wind around the winding post 120, then wound to the ending end, and then the wire is cut and the above steps are repeated on another winding post 120.

[0003] However, when unwinding the wire after winding, the process is cumbersome because each winding post 120 has a tail coil underneath. Each tail coil needs to be removed individually without tangling. Furthermore, current technology typically winds the tail coil onto a single post, making it difficult to quickly adjust the diameter and type of tail coil when needed. Summary of the Invention

[0004] In view of this, the present invention provides a stator coil winding mechanism suitable for use with the start and end wires located at both ends, in order to solve the above-mentioned technical problems.

[0005] A stator coil winding mechanism suitable for use with the starting and ending wires located at both ends. The stator coil winding mechanism for use with the starting and ending wires located at both ends includes a winding seat assembly and two clamping assemblies disposed on one side of the winding seat assembly. The winding seat assembly includes a rotating device, a mounting base disposed on the rotating device, a placement ring disposed on the mounting base, and a plurality of ending wire winding assemblies disposed on the mounting base. The side wall of the mounting base has a plurality of openings spaced apart for mounting the ending wire winding assemblies. Each ending wire winding assembly includes a support column disposed within one of the openings, a mounting block disposed on the support column, at least two winding column assemblies disposed on the mounting block, a movable plate disposed on the winding column assembly, and a movable member connecting the movable plate and the mounting block. The mounting block has four first through holes, two second through holes, and one third through hole. Each winding column assembly includes a winding shaft movably inserted into the first through hole and two bushings disposed within the first through hole. One end of the winding shaft is connected to the movable plate, and the other end extends out of the first through hole. The movable plate is connected to one end of the winding shaft and one end of the movable member. One end of the movable member is movably disposed in the third through hole, and the other end is connected to the center of the movable plate. The clamping assembly includes a third cylinder and a gripper cylinder disposed on the output end of the third cylinder. The gripper cylinder is used to clamp the movable plate and drive it to move, so that the winding shaft retracts into the first through hole.

[0006] Furthermore, the inner wall of the placement ring is provided with an extension section extending toward its central axis, and multiple thread-starting posts are arranged circumferentially on the placement ring.

[0007] Furthermore, the four first through holes are arranged in a square array on the mounting block and include two first cylindrical segments located at both ends of the first through holes, and a second cylindrical segment located between the two first cylindrical segments.

[0008] Furthermore, the diameter of the first cylindrical segment is larger than the diameter of the second cylindrical segment, and the bushing is disposed inside the first cylindrical segment.

[0009] Furthermore, the diameter of the third through hole at the end closer to the moving plate is smaller than the diameter at the end farther from the moving plate.

[0010] Furthermore, the two ends of the second through hole are respectively connected to the second cylindrical segments of the two first through holes.

[0011] Furthermore, the winding shaft is provided with a locking groove for engaging with the ball-head plunger, and the locking groove is located near the end of the winding shaft that extends out of the first through hole.

[0012] Furthermore, the winding post assembly also includes a ball-head plunger disposed in the second through hole, the ball-head plunger abutting against the side wall of the winding shaft, and the ball-head plunger engaging with the engaging groove when the winding shaft retracts into the first through hole.

[0013] Furthermore, the stator coil winding mechanism suitable for the start and end wires located at both ends further includes a wire cutting and clamping assembly disposed on one side of the winding seat assembly. The wire cutting and clamping assembly includes a bracket disposed on one side of the winding seat assembly, a first cylinder disposed on the bracket, a wire cutting cylinder disposed on the first cylinder, a second cylinder disposed on the bracket, and a wire clamping cylinder disposed on the second cylinder. The first cylinder is used to drive the wire cutting cylinder to move towards or away from the winding seat assembly, and the height of the wire cutting cylinder is located between the placement ring and the end wire winding assembly.

[0014] Furthermore, the stator coil winding mechanism suitable for use with starter and tail wires located at both ends further includes a locking assembly disposed on the winding seat assembly. The locking assembly includes a rocker arm disposed on the placement ring, a locking plate rotatably disposed within the rocker arm, a pin passing through the locking plate, a spring disposed at one end of the locking plate, a drive cylinder disposed on the base, and a pressure plate disposed at the output end of the drive cylinder. One end of the locking plate extends out of the rocker arm and faces the central axis of the placement ring, while the other end is provided with the spring. One end of the spring is connected to the locking plate, and the other end is connected to the placement ring.

[0015] Compared with the prior art, the mounting block of the stator coil winding mechanism with the tail wire located at both ends provided by the present invention has four first through holes, two second through holes, and one third through hole. The winding post assembly is disposed in the first through hole, one end of the winding shaft is connected to the moving plate, and the other end extends out of the first through hole, with the extended portion used for winding the tail wire. The moving plate is connected to one end of the winding shaft and one end of the movable member, so that when the clamping assembly clamps the moving plate and moves it, it can drive the winding shaft to move together, thereby controlling whether the winding shaft retracts or extends. Therefore, when the winding shaft retracts into the first through hole, the wire originally wound on the winding shaft will also automatically fall off, realizing rapid unloading of the tail coil. At the same time, since multiple winding shafts can wind tail wires of different sizes and types, the applicability is improved. Attached Figure Description

[0016] Figure 1 This invention provides a structural schematic diagram of a stator coil winding mechanism suitable for use with the start and end wires located at both ends.

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of a winding seat assembly applicable to a stator coil winding mechanism with the start and end wires located at both ends.

[0018] Figure 3 for Figure 1 A schematic diagram of the placement ring structure applicable to stator coil winding mechanisms with start and end wires located at both ends.

[0019] Figure 4 for Figure 1 A schematic diagram of the tail wire winding assembly of a stator coil winding mechanism applicable to stator coil winding mechanisms with the tail wires located at both ends.

[0020] Figure 5 for Figure 1 An exploded view of the tail wire winding assembly of a stator coil winding mechanism applicable to stator coil winding mechanisms with the tail wires located at both ends.

[0021] Figure 6 for Figure 1 A cross-sectional view of the tail wire winding assembly of a stator coil winding mechanism applicable to stator coil winding mechanisms with the tail wires located at both ends.

[0022] Figure 7 for Figure 1 An isometric sectional view of the mounting blocks and support columns of a stator coil winding mechanism with the start and end wires located at both ends.

[0023] Figure 8 for Figure 1 A schematic diagram of the clamping assembly of a stator coil winding mechanism applicable to stator coils with starter and tail wires located at both ends.

[0024] Figure 9 for Figure 1 A schematic diagram of the structure of the coil frame to be wound by a stator coil winding mechanism with the start and end wires located at both ends. Detailed Implementation

[0025] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0026] like Figures 1 to 9The diagram shows a structural schematic of a stator coil winding mechanism with the starter and tail wires located at both ends, as provided by the present invention. The stator coil winding mechanism with the starter and tail wires located at both ends includes a winding base assembly 10, a wire cutting and clamping assembly 20 disposed on one side of the winding base assembly 10, two clamping assemblies 30 disposed on one side of the winding base assembly 10, and a locking assembly 40 disposed on the winding base assembly 10. It is conceivable that the stator coil winding mechanism with the starter and tail wires located at both ends also includes other functional modules, such as connecting components, sensors, and mounting components, etc., which are technologies well known to those skilled in the art and will not be described in detail here.

[0027] First, it should be noted that the stator coil winding mechanism applicable to stator coils with the start and end wires located at both ends is used to wind the coil frame 100. The coil frame 100 is as follows... Figure 9 As shown, the coil frame 100 includes a ring-shaped body 110 and a plurality of winding posts 120 disposed on the inner sidewall of the body 110. The number of winding posts 120 and the number of starting ends 130 are the same. The structure of the coil frame 100 should be prior art and will not be described in detail here.

[0028] The winding seat assembly 10 is disposed on the base 50, which supports the aforementioned functional modules, namely the winding seat assembly 10, the wire cutting and clamping assembly 20, and the clamping assembly 30. Therefore, the base 50 is provided with various functional structures, such as screws, bolts, through holes, etc., to complete the installation and assembly of the aforementioned functional modules. These can be configured according to actual needs, and will not be described in detail here.

[0029] The winding seat assembly 10 includes a rotating device 11 disposed on the base 50, a mounting seat 12 disposed on the rotating device 11, a placement ring 13 disposed on the mounting seat 12, and a plurality of tail wire winding assemblies 14 disposed on the mounting seat 12.

[0030] In this embodiment, the rotating device 11 is a motor used to drive the winding seat assembly 10 to rotate in order to cooperate with the guide needle to wind the winding post 120 at different positions on the coil frame 100.

[0031] The mounting base 12 has a hollow cylindrical structure. One end of the mounting base 12 is located on the output end of the rotating device 11, and the other end is provided with the placement ring 13. Multiple openings 121 for mounting the tail wire winding assembly 14 are spaced apart on the side wall of the mounting base 12. The openings 121 are square in shape, and the number of openings 121 is the same as the number of winding posts 120 and their positions correspond. Each opening 121 is used to mount one tail wire winding assembly 14, allowing the tail wire on a winding post 120 to be wound onto the tail wire winding assembly 14.

[0032] The placement ring 13 is used to place the coil frame 100. An extension segment 131 extending towards its central axis is provided on the inner sidewall of the placement ring 13. The extension segment 131 supports the bottom of the coil frame 100, and the inner sidewall of the placement ring 13 is in contact with the outer sidewall of the coil frame 100, thereby placing the coil frame 100 within the placement ring 13. It is conceivable that locking the top of the coil frame 100 can be achieved using the locking assembly 40, which will be described in detail below along with the locking assembly 40.

[0033] The placement ring 13 has a plurality of starting posts 132 arranged circumferentially, the number of starting posts 132 being the same as the number of winding posts 120 and serving as the starting end for winding.

[0034] The tail wire winding assembly 14 includes a support post 141 disposed in the opening 121, a mounting block 142 disposed on the support post 141, at least two winding post assemblies 143 disposed on the mounting block 142, a movable plate 144 disposed on the winding post assembly 143, and a movable member 145 connecting the movable plate 144 and the mounting block 142.

[0035] One end of the support column 141 is located at the bottom of the opening 121, and the other end is provided with the mounting block 142.

[0036] The mounting block 142 is provided with four first through holes 1421, two second through holes 1422, and one third through hole 1423.

[0037] Four first through holes 1421 are arranged in a square array on the mounting block 142. Each first through hole 1421 is used to mount the winding post assembly 143 and includes two first cylindrical segments 14211 located at both ends of the first through hole 1421, and a second cylindrical segment 14212 located between the two first cylindrical segments 14211. The diameter of the first cylindrical segment 14211 is larger than the diameter of the second cylindrical segment 14212. The two ends of the second through hole 1422 communicate with the second cylindrical segments 14212 of the two first through holes 1421, respectively. A third through hole 1423 is located at the center of the four first through holes 1421 and is used to mount the movable member 145. The diameter of the end of the third through hole 1423 near the moving plate 144 is smaller than the diameter of the end away from the moving plate 144.

[0038] The winding post assembly 143 includes a winding shaft 1431 movably inserted into the first through hole 1421, two bushings 1432 disposed in the first cylindrical section 14211, and a ball-head plunger 1433 disposed in the second through hole 1422.

[0039] One end of the winding shaft 1431 is connected to the movable plate 144, and the other end extends out of the first through hole 1421, with the extended portion used for winding the tail wire. A locking groove 1434 is provided on the winding shaft 1431 for engaging with the ball-head plunger 1433. The locking groove 1434 is located near the end of the winding shaft 1431 extending out of the first through hole 1421, so that when the winding shaft 1431 retracts into the first through hole 1421, the locking groove 1434 moves backward together and engages with the ball-head plunger 1433, thereby fixing the winding shaft 1431.

[0040] The two bushings 1432 are respectively located within the two first cylindrical segments 14211. The bushings 1432 are used to reduce friction when the winding shaft 1431 moves, so as to support the stable movement of the winding shaft 1431.

[0041] The ball-head plunger 1433 is located in the second through hole 1422 and abuts against the side wall of the winding shaft 1431. The ball-head plunger 1433 is used to engage with the locking groove 1434 when the winding shaft 1431 retracts into the first through hole 1421, thereby preventing the winding shaft 1431 from moving. It is conceivable that the ball-head plunger 1433 can also be a double ball-head plunger. In this embodiment, two winding shafts 1431 are arranged diagonally, so only ball-head plungers are needed for fixation. When it is necessary to increase the tail wire winding size, four winding shafts 1431 will be set to increase the tail wire winding diameter. At the same time, the ball-head plunger needs to be replaced with a double ball-head plunger so that two winding shafts can be fixed at both ends respectively.

[0042] The movable plate 144 is connected to one end of the winding shaft 1431 and one end of the movable member 145, so that when the clamping assembly 40 clamps the movable plate 144 and moves it, it can move the winding shaft 1431 together, thereby controlling whether the winding shaft 1431 retracts or extends.

[0043] One end of the movable component 145 is movably disposed in the third through hole 1423, and the other end is connected to the center of the movable plate 144. The movable component 145 is used to improve the stability of the movement of the movable plate 144. Since the diameter of the end of the third through hole 1423 near the movable plate 144 is smaller than the diameter of the end away from the movable plate 144, the movable component 145 will be stuck when it moves to the end with the smaller diameter, thereby playing a limiting role.

[0044] The wire cutting and clamping assembly 20 includes a bracket 21 disposed on one side of the winding seat assembly 10, a first cylinder 22 disposed on the bracket 21, a wire cutting cylinder 23 disposed on the first cylinder 22, a second cylinder 24 disposed on the bracket 21, and a wire clamping cylinder 25 disposed on the second cylinder 24.

[0045] The first cylinder 22 drives the wire-cutting cylinder 23 to move closer to or away from the winding seat assembly 10. The height of the wire-cutting cylinder 23 is between the placement ring 13 and the tail wire winding assembly 14, so that the first cylinder 22 can drive the wire-cutting cylinder 23 to extend into the opening 121 to cut the wire. After the tail coil of a winding post 120 is wound, the wire is cut by the wire-cutting cylinder 23 to proceed with the winding of the next winding post 120. The second cylinder 24 drives the wire-clamping cylinder 25 to move closer to or away from the winding seat assembly 10. The height of the wire-clamping cylinder 25 is the same as that of the starting post 132. The wire-clamping cylinder 25 is used to clamp the wire before winding, thereby tightening the wire.

[0046] In this embodiment, two clamping components 30 are provided and are arranged opposite each other on both sides of the winding seat assembly 10, so that the moving plate 144 can be pulled out and pushed in simultaneously, improving efficiency. Each clamping component 30 includes a third cylinder 31 and a gripper cylinder 32 disposed on the output end of the third cylinder 31. The height of the gripper cylinder 32 is the same as the height of the moving plate 144, and it is used to clamp the moving plate 144 and drive it to move.

[0047] The locking assembly 40 includes a rocker arm 41 disposed on the placement ring 13, a locking plate 42 rotatably disposed within the rocker arm 41, a pin 43 passing through the locking plate 42, a spring 44 disposed at one end of the locking plate 42, a drive cylinder 45 disposed on the base 50, and a pressure plate 46 disposed at the output end of the drive cylinder 45.

[0048] The lifting frame 41 has a square frame structure and is located on the edge of the placement ring 13. The locking plate 42 is rotatably mounted inside the lifting frame 41 via the pin 43 at its middle position. One end of the locking plate 42 extends out of the lifting frame 41 and faces the central axis of the placement ring 13; this end is used to press down on the coil frame. The other end is equipped with the spring 44. One end of the spring 44 is connected to the locking plate 42, and the other end is connected to the placement ring 13. The spring 44's own elastic force drives the locking plate 43 to rotate, causing the other end of the locking plate 43 to press down, thereby locking the coil frame. The spring 44's own elastic force is the kinetic energy for locking the coil frame, so the locking plate 42 still has the kinetic energy to lock the coil frame during rotation. The driving cylinder 45 is used to drive the pressure plate 46 to move. When unlocking is required, the pressure plate 46 presses against the end of the locking plate 42 with the spring 44, thereby compressing the spring 44. In this way, the other end of the locking plate 42 will lift up and move away from the coil frame, thereby opening the locking mechanism 40. During winding, the coil frame 100 is first placed inside the placement ring 13, and the wire clamping cylinder 25 clamps the wire. Then, driven by the external moving device, the guide pin first winds the wire onto the starting end 132, and then extends into the body 110 to wind the wire onto the winding post 120. After winding the corresponding number of turns, the guide pin moves down to wind the wire onto the two winding shafts 1431, thereby forming the tail coil. The first cylinder 22 drives the wire cutting cylinder 23 to extend into the opening 121 to cut the wire. The rotating device 11 drives the winding seat assembly 10 to rotate one position, the wire clamping cylinder 25 clamps the wire again, and the above winding steps are repeated until all winding posts 120 are wound. After all winding is completed, the clamping assembly 30 grasps the moving plate 144 and moves it backward, causing the winding shaft 1431 to retract into the first through hole 1421. The wire originally wound on the winding shaft 1431 will also automatically fall off, realizing rapid unloading of the tail coil. Then, the rotating device 11 drives the winding seat assembly 10 to rotate one station to unload the tail wires from all the tail wire winding assemblies 14. When it is necessary to change the diameter of the tail coil, multiple winding shafts 1431 can be set up, or the wire can be wound onto different numbers of winding shafts 1431 as needed, thereby changing the diameter of the tail coil. At the same time, multiple winding shafts 1431 can also have different winding methods, such as the guide pin moving in a figure-eight shape or in a series of continuous circles, thereby realizing different types of tail wire winding and improving applicability.

[0049] Compared with the prior art, the mounting block 142 of the stator coil winding mechanism with the starter and tail wires located at both ends provided by the present invention has four first through holes 1421, two second through holes 1422, and one third through hole 1423. The winding post assembly 143 is disposed in the first through hole 1421. One end of the winding shaft 1431 is connected to the moving plate 144, and the other end extends out of the first through hole 1421, with the extended portion used for winding the tail wire. The moving plate 144 is connected to one end of the winding shaft 1431 and one end of the movable member 145, so that when the clamping assembly 40 clamps the moving plate 144 and moves it, it can drive the winding shaft 1431 to move together, thereby controlling whether the winding shaft 1431 retracts or extends. Therefore, when the winding shaft 1431 retracts into the first through hole 1421, the wire originally wound on the winding shaft 1431 will also automatically fall off, realizing rapid unloading of the tail coil. Meanwhile, the availability of multiple winding spools 1431 allows for the winding of tail wires of various sizes and types, thus improving applicability.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. A stator coil winding mechanism suitable for use with the start and end wires located at both ends, characterized in that: The stator coil winding mechanism applicable to stator coils with the tail wire located at both ends includes a winding seat assembly and two clamping assemblies disposed on one side of the winding seat assembly. The winding seat assembly includes a rotating device, a mounting base disposed on the rotating device, a placement ring disposed on the mounting base, and a plurality of tail wire winding assemblies disposed on the mounting base. The side wall of the mounting base has a plurality of openings spaced apart for mounting the tail wire winding assemblies. Each tail wire winding assembly includes a support column disposed within an opening, a mounting block disposed on the support column, at least two winding column assemblies disposed on the mounting block, a movable plate disposed on the winding column assembly, and a clamping device connecting the movable plate and the mounting block. The mounting block has four first through holes, two second through holes, and one third through hole. The winding post assembly includes a winding shaft movably inserted into the first through hole and two bushings disposed in the first through hole. One end of the winding shaft is connected to a moving plate, and the other end extends out of the first through hole. The moving plate is connected to one end of the winding shaft and one end of the movable component. One end of the movable component is movably disposed in the third through hole, and the other end is connected to the center of the moving plate. The clamping assembly includes a third cylinder and a gripper cylinder disposed on the output end of the third cylinder. The gripper cylinder is used to clamp the moving plate and drive it to move so that the winding shaft retracts into the first through hole.

2. The stator coil winding mechanism as described in claim 1, applicable to stator coils with the start and end wires located at both ends, characterized in that: The inner wall of the placement ring is provided with an extension section extending toward its central axis, and multiple thread-starting posts are arranged circumferentially on the placement ring.

3. The stator coil winding mechanism as described in claim 1, applicable to stator coils with the start and end wires located at both ends, characterized in that: The four first through holes are arranged in a square array on the mounting block and include two first cylindrical segments located at both ends of the first through holes, and a second cylindrical segment located between the two first cylindrical segments.

4. The stator coil winding mechanism as described in claim 3, applicable to stator coils with starter and tail wires located at both ends, characterized in that: The diameter of the first cylindrical segment is larger than the diameter of the second cylindrical segment, and the bushing is disposed inside the first cylindrical segment.

5. The stator coil winding mechanism as described in claim 3, applicable to stator coils with the start and end wires located at both ends, characterized in that: The diameter of the third through hole at the end closest to the moving plate is smaller than the diameter at the end furthest from the moving plate.

6. The stator coil winding mechanism as described in claim 3, applicable to stator coils with the start and end wires located at both ends, characterized in that: The two ends of the second through hole are respectively connected to the second cylindrical sections of the two first through holes.

7. The stator coil winding mechanism as described in claim 1, applicable to stator coils with the start and end wires located at both ends, characterized in that: The winding post assembly further includes a ball-head plunger disposed in the second through hole. The winding shaft is provided with a locking groove for engaging with the ball-head plunger. The locking groove is located near the end of the winding shaft that extends out of the first through hole. The ball-head plunger abuts against the side wall of the winding shaft. When the winding shaft retracts into the first through hole, the ball-head plunger engages with the locking groove.

8. The stator coil winding mechanism as described in claim 1, applicable to stator coils with starter and tail wires located at both ends, characterized in that: The stator coil winding mechanism applicable to both ends of the starting and ending wires further includes a wire cutting and clamping assembly disposed on one side of the winding seat assembly. The wire cutting and clamping assembly includes a bracket disposed on one side of the winding seat assembly, a first cylinder disposed on the bracket, a wire cutting cylinder disposed on the first cylinder, a second cylinder disposed on the bracket, and a wire clamping cylinder disposed on the second cylinder. The first cylinder is used to drive the wire cutting cylinder to move towards or away from the winding seat assembly. The height of the wire cutting cylinder is located between the placement ring and the ending wire winding assembly.

9. The stator coil winding mechanism as described in claim 1, applicable to stator coils with starter and tail wires located at both ends, characterized in that: The stator coil winding mechanism applicable to both ends of the starting and ending wires further includes a locking component disposed on the winding seat assembly. The winding seat assembly is disposed on the base. The locking component includes a rocker arm disposed on the placement ring, a locking plate rotatably disposed within the rocker arm, a pin passing through the locking plate, a spring disposed at one end of the locking plate, a drive cylinder disposed on the base, and a pressure plate disposed at the output end of the drive cylinder. One end of the locking plate extends out of the rocker arm and faces the central axis of the placement ring, and the other end is provided with the spring. One end of the spring is connected to the locking plate, and the other end is connected to the placement ring.

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