Serpentine spring coupling

Abstract

The serpentine spring coupler comprises a serpentine spring, a pair of shaft sleeves, a left sleeve body and a right sleeve body, a plurality of extending blocks are fixedly arranged on the left sleeve body, inserting grooves are formed between the extending blocks, a plurality of sliding grooves corresponding to the inserting grooves are formed in the right sleeve body, and a pair of locking inserting blocks is slidably installed in each sliding groove. The end portion of each locking insertion block is matched with the lower surface of the adjacent extension block in an inserted mode through a clamping groove, a thrust spring is arranged between a pair of adjacent locking insertion blocks, an unlocking assembly is further arranged on the right sleeve body, and the unlocking assembly is used for enabling each locking insertion block to be separated from the corresponding clamping groove and to be kept. The left sleeve body and the right sleeve body are folded, the locking insertion blocks are connected with the corresponding clamping grooves in an inserted mode under the action of the corresponding thrust springs, the unlocking assembly is operated to enable the locking insertion blocks to be disengaged from the corresponding clamping grooves and keep the state, assembling and disassembling of the left sleeve body and the right sleeve body are facilitated, and convenience of maintenance of the serpentine spring coupler is improved.

Description

Technical Field

[0001] The invention relates to the technical field of couplings, in particular to a serpentine spring coupling. Background Art

[0002] The serpentine spring coupling is a metal elastic coupling that uses the elastic deformation of serpentine spring leaves to transmit torque and has certain compensation for the relative offset of the two shafts, vibration reduction and buffering performance.

[0003] It is mainly composed of two half couplings, two half covers, two sealing rings and serpentine springs. The serpentine springs are embedded in the tooth grooves of the half couplings to transmit torque. During operation, the axial force of the active end teeth on the serpentine springs drives the driven end to transmit torque.

[0004] The two outer half covers are usually connected to each other by bolts. In order to ensure that the serpentine spring works in the best position, maintenance personnel are generally required to regularly disassemble the two outer half covers for inspection and restore the serpentine spring to the best working position, wasting a lot of manpower and material resources. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art.

[0006] The present application provides a serpentine spring coupling, comprising a serpentine spring, a pair of shaft sleeves, a left sleeve body and a right sleeve body, wherein a plurality of extension blocks are fixedly arranged on the left sleeve body, slots are formed between the extension blocks, a plurality of slide grooves corresponding to the slots are arranged on the right sleeve body, a pair of locking plug blocks are slidably installed in each slide groove, the end of each locking plug block is plug-in-matched with the lower surface of the adjacent extension block through a slot, a thrust spring is arranged between the adjacent pair of locking plug blocks, and an unlocking component is also arranged on the right sleeve body, the unlocking component is used to disengage and maintain each locking plug block from the corresponding slot.

[0007] The card slot is arranged on the bottom surface of the extension block's extended section, and the cross-section shape is a right triangle with the inclined surface facing the left sleeve body, and the ends of each locking plug block are right triangles.

[0008] The unlocking assembly includes a rotating ring rotatably mounted on the peripheral wall of the right sleeve body, and a plurality of unlocking slides slidably mounted in each slot. Each unlocking slide is connected to the rotating ring through a transmission assembly and connected to a corresponding pair of locking plugs through a pressing assembly. A plurality of reset grooves are provided on the peripheral wall of the rotating ring. The other end of each unlocking slide extends into one end of each reset groove. A reset spring is provided between the side wall and the other end of each reset groove. A limiting assembly is provided on the inner peripheral wall of the rotating ring and the outer peripheral wall of the right sleeve body.

[0009] The transmission assembly includes a transmission column fixed at the bottom of the reset groove, and an inclined groove and a straight groove are provided on the unlocking slide. The inclined groove is connected to the straight groove away from the left sleeve end, and the straight groove extends along the circumference of the rotating ring.

[0010] The pressing assembly includes extrusion blocks fixed on the top surfaces of the adjacent ends of a pair of adjacent locking inserts. The surfaces of the extrusion blocks facing the adjacent extension blocks are inclined away from the left sleeve body. Trapezoidal grooves are formed at the ends of the unlocking sliding plates away from the transmission assembly. The two sides of the trapezoidal grooves are inclined. A pair of extrusion blocks are inserted into the trapezoidal grooves.

[0011] The limiting assembly includes a diamond-shaped groove. A straight sliding groove extending along its axis is provided on the peripheral wall of the right sleeve body. A sliding block is slidably installed in the straight sliding groove. A limiting rod slidably engaged with the diamond-shaped groove is fixed on the top of the sliding block. A limiting groove is provided at one end of the inner ring of the diamond-shaped groove, and a triangular dial block is provided on the outer ring at the same end.

[0012] There are several limiting assemblies, which are arranged at intervals in the circumferential direction.

[0013] Several inner arc grooves are provided at intervals at the right end of the peripheral wall of the right sleeve body. Several arc-shaped sliding blocks are provided at intervals on the inner peripheral wall of the rotating ring. Each arc-shaped sliding block is slidably installed in each inner arc groove.

[0014] Each arc-shaped sliding block corresponds to each reset groove. Outer arc grooves are formed at the bottoms of the reset grooves. A pair of parallel grooves extending along the sliding direction of the unlocking sliding plate are symmetrically provided on each unlocking sliding plate. Bolts are inserted into each parallel groove. The lower ends of the bolts pass through the corresponding outer arc grooves and are connected to the bottoms of the inner arc grooves through screw holes.

[0015] It further includes several insertion posts, which are respectively fixed at the ends of the reset grooves away from the unlocking sliding plates. The ends of the reset springs away from the unlocking sliding plates are sleeved on the corresponding insertion posts.

[0016] The beneficial effects of the present invention are as follows:

[0017] When assembling the left sleeve body and the right sleeve body, align each unlocking sliding plate with the corresponding slot, close the left sleeve body and the right sleeve body. Under the action of each thrust spring, the outer ends of the locking inserts are inserted into the corresponding card slots, completing the assembly of the left sleeve body and the right sleeve body. Compared with the prior art, the assembly of the two sleeve bodies in this application is fast.

[0018] When it is necessary to separate the left sleeve body and the right sleeve body, rotate the rotating ring counterclockwise. The limiting rod slides to one side of the triangular dial block. Each reset spring is compressed and shortened. The transmission column enters the end of the straight groove. Each unlocking sliding plate continues to penetrate into the slot. The two side surfaces of each trapezoidal groove push the corresponding pair of extrusion blocks closer to each other. The outer ends of the locking plates are disengaged from the corresponding card slots. Then release the rotating ring. Each reset spring releases part of its elastic potential energy, pushing the rotating ring to rotate clockwise. The transmission column moves to the position where the straight groove is connected to the inclined groove. The limiting rod enters the bottom of the limiting groove. At this time, the rotating ring cannot continue to rotate. Correspondingly, the transmission column cannot enter the inclined groove, fixing the positions of each unlocking sliding plate. Then the left sleeve body and the right sleeve body can be separated. Compared with the prior art, this makes it convenient to separate the left sleeve body and the right sleeve body, and there is no risk of the bolts falling off and getting lost.

[0019] After the left sleeve body and the right sleeve body are separated, rotate the rotating ring counterclockwise. The limiting rod disengages from the limiting groove and is pushed out of the limiting groove by the other inclined surface of the triangular dial block. Then release the rotating ring, and each return spring releases its elastic potential energy, pushing the rotating ring to rotate counterclockwise. Each transmission column enters the end of the inclined groove, and each unlocking slide plate slides out of each slot. Each trapezoidal groove disengages from the contact with each extrusion block, and each thrust spring releases its elastic potential energy, pushing each pair of locking inserts to separate from each other, completing the reset. When the left sleeve body and the right sleeve body are assembled, they can automatically be inserted and matched with the slots on the bottom surface of the corresponding extension blocks. Compared with the prior art, the disassembly and assembly efficiency of the left sleeve body and the right sleeve body of the present application is high, reducing the consumption of manpower and material resources. Description of the Drawings

[0020] Figure 1 Top view of the serpentine spring coupling in the embodiment of the present application;

[0021] Figure 2 Three-dimensional view of the serpentine spring and a pair of shaft sleeves in the embodiment of the present application;

[0022] Figure 3 Partial internal structure display diagram of the serpentine spring coupling in the embodiment of the present application;

[0023] Figure 4 Right view of the left shaft sleeve in the embodiment of the present application;

[0024] Figure 5 Schematic cross-sectional structure diagram in the A-A direction in the embodiment of the present application.

[0025] Reference Signs

[0026] 1 - Serpentine spring, 2 - Shaft sleeve, 3 - Left sleeve body, 4 - Right sleeve body, 5 - Extension block, 6 - Slot, 7 - Slide groove, 8 - Locking insert, 9 - Card slot, 10 - Thrust spring, 11 - Unlocking assembly, 111 - Rotating ring, 112 - Unlocking slide plate, 113 - Reset groove, 114 - Return spring, 115 - Transmission column, 116 - Inclined groove, 117 - Straight groove, 118 - Extrusion block, 119 - Trapezoidal groove, 12 - Limiting assembly, 121 - Rhombic groove, 122 - Straight slide groove, 123 - Sliding block, 124 - Limiting rod, 125 - Limiting groove, 126 - Triangular dial block, 13 - Inner arc groove, 14 - Arc-shaped slider, 15 - Outer arc groove, 16 - Parallel groove, 17 - Bolt. Detailed Description of the Embodiment

[0027] Next, the technical solutions in the embodiments of the present application will be clearly described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0028] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0029] The following will combine the accompanying drawings and, through specific embodiments and their application scenarios, provide a detailed description of the serpentine spring 1 coupling provided by the embodiments of this application.

[0030] Embodiment 1:

[0031] As Figures 1 to 5 shown, the embodiments of this application provide a serpentine spring 1 coupling, which includes a serpentine spring 1, a pair of shaft sleeves 2, a left sleeve body 3 and a right sleeve body 4. A number of extension blocks 5 are fixedly arranged on the left sleeve body 3, and slots 6 are formed between the extension blocks 5. A number of chutes 7 corresponding to the slots 6 are arranged on the right sleeve body 4. A pair of locking inserts 8 are slidably installed in each chute 7. The ends of the locking inserts 8 are inserted and matched with the lower surface of the adjacent extension block 5 through a card slot 9. A thrust spring 10 is arranged between a pair of adjacent locking inserts 8. The right sleeve body 4 is also provided with an unlocking assembly 11, and the unlocking assembly 11 is used to make each locking insert 8 disengage from the corresponding card slot 9 and remain.

[0032] In this embodiment of this application, the card slot 9 is arranged on the bottom surface of the outer extension section of the extension block 5, and the cross-sectional shape is a right triangle with the inclined surface facing the left sleeve body 3, and the ends of the locking inserts 8 are all right triangles.

[0033] Due to the adoption of the above serpentine spring 1 coupling, when assembling the left sleeve body 3 and the right sleeve body 4, the left sleeve body 3 and the right sleeve body 4 are closed. The inclined outer ends of the locking inserts 8 come into contact with the outer ends of the corresponding extension blocks 5. During the closing process of the left sleeve body 3 and the right sleeve body 4, the locking inserts 8 are pushed away from the corresponding extension blocks 5. Each thrust spring 10 is compressed and shortens to store elastic potential energy until the left sleeve body 3 and the right sleeve body 4 are closed. The outer ends of the locking inserts 8 respectively correspond to the card slots 9, and the thrust spring 10 releases the elastic potential energy and pushes the locking inserts 8 towards the corresponding card slots 9, so that the outer ends of the locking inserts 8 are inserted into the corresponding card slots 9, and the assembly of the left sleeve body 3 and the right sleeve body 4 is completed and cannot be separated.

[0034] When the left casing 3 and the right casing 4 need to be separated, the unlocking assembly 11 is operated to disengage each locking plug 8 from the corresponding slot 9 to separate the left casing 3 and the right casing 4. Compared with the prior art, the disassembly and assembly of the two casings of the present application is convenient and quick.

[0035] Embodiment 2:

[0036] In this embodiment, in addition to the structural features of the aforementioned embodiments, the unlocking assembly 11 includes a rotating ring 111 rotatably mounted on the peripheral wall of the right sleeve 4, and a plurality of unlocking slides 112 slidably mounted in each slot 6, each unlocking slide 112 is connected to the rotating ring 111 through a transmission assembly, and is connected to the corresponding pair of locking plugs 8 through a pressing assembly, a plurality of reset grooves 113 are provided on the peripheral wall of the rotating ring 111, and the other end of each unlocking slide 112 extends into one end of each reset groove 113, a reset spring 114 is provided between the side wall and the other end of each reset groove 113, and a limiting assembly 12 is provided on the inner peripheral wall of the rotating ring 111 and the outer peripheral wall of the right sleeve 4.

[0037] In this embodiment of the present application, the transmission assembly includes a transmission column 115 fixed at the bottom of the reset groove 113, and an inclined groove 116 and a straight groove 117 are provided on the unlocking slide 112. The inclined groove 116 is connected to the straight groove 117 away from the end of the left sleeve 3, and the straight groove 117 extends along the circumference of the rotating ring 111.

[0038] In this embodiment of the present application, the pressing assembly includes an extrusion block 118 fixed on the top surface of the adjacent ends of a pair of adjacent locking plug blocks 8, each extrusion block 118 is inclined toward the surface of the adjacent extension block 5 away from the left sleeve 3, and each unlocking slide plate 112 is provided with a trapezoidal groove 119 away from the transmission assembly end, the two sides of the trapezoidal groove 119 are inclined, and a pair of extrusion blocks 118 are inserted in the trapezoidal groove 119.

[0039] In this embodiment of the present application, a plurality of plug posts 118 are further included, which are respectively fixed to one end of each reset groove 113 away from the unlocking slide 112 , and one end of each reset spring 114 away from the unlocking slide 112 is sleeved on the corresponding plug post 118 .

[0040] like Figure 1 and Figure 3As shown in the figure, when it is necessary to disassemble the left sleeve body 3 and the right sleeve body 4 due to the adoption of the above-mentioned serpentine spring 1 coupling, rotate the rotating ring 111 counterclockwise. The limiting rod slides to one side of the triangular dial 126, and each reset spring 114 is compressed and shortened. The transmission column 115 enters the end of the straight groove 117. Each unlocking slide plate 112 continues to penetrate into the slot 6. The two side surfaces of each trapezoidal groove 119 push a corresponding pair of extrusion blocks 118 to approach each other. The outer ends of each locking plug board disengage from the corresponding card slot 9. Then release the rotating ring 111. Each reset spring 114 releases part of its elastic potential energy and pushes the rotating ring 111 to rotate clockwise. The transmission column 115 moves to the connection position of the straight groove 117 and the inclined groove 116. The limiting component 12 limits the continuous rotation of the rotating ring 111. Correspondingly, the transmission column 115 cannot enter the inclined groove 116, so that the positions of each unlocking slide plate 112 are fixed, and the left sleeve body 3 and the right sleeve body 4 can be separated. After the left sleeve body 3 and the right sleeve body 4 are separated, rotate the rotating ring 111 counterclockwise. The limiting component 12 releases the restriction on the rotating ring 111. Then release the rotating ring 111. Each reset spring 114 releases its elastic potential energy and pushes the rotating ring 111 to rotate counterclockwise. Each transmission column 115 enters the end of the inclined groove 116. Each unlocking slide plate 112 slides out of each slot 6. Each trapezoidal groove 119 disengages from the contact with each extrusion block 118. Each thrust spring 10 releases its elastic potential energy and pushes each pair of locking blocks 8 to separate from each other to complete the reset. When the left sleeve body 3 and the right sleeve body 4 are assembled, they can be automatically inserted and matched with the slots 6 on the bottom surface of the corresponding extension block 5. Compared with the prior art, the disassembly and assembly efficiency of the left sleeve body 3 and the right sleeve body 4 of the present application is high, and the consumption of human and material resources is reduced.

[0041] Embodiment 3:

[0042] In this embodiment, in addition to including the structural features of the foregoing embodiment, the limiting component 12 includes a diamond-shaped groove 121. A straight sliding groove 122 extending along its axis is provided on the peripheral wall of the right sleeve body 4. A sliding block 123 is slidably installed in the straight sliding groove 122. A limiting rod 124 slidably matched with the diamond-shaped groove 121 is fixedly provided at the top of the sliding block 123. A limiting groove 125 is provided at one end of the inner circle of the diamond-shaped groove 121, and a triangular dial 126 is provided on the outer circle at the same end.

[0043] In this embodiment of the present application, there are several limiting components 12, which are arranged at intervals in the circumferential direction.

[0044] Such as Figure 3As shown, due to the adoption of the above-mentioned serpentine spring 1 coupling, the tip at the lower end of the inner ring of the diamond-shaped groove 121 is offset to the left relative to the tip at the lower end of the outer ring of the diamond-shaped groove 121. When the rotating ring 111 rotates counterclockwise relative to the right sleeve 4, the diamond-shaped groove 121 and the limiting rod 124 move relative to each other. The limiting rod 124 contacts the right side of the inner ring of the diamond-shaped groove 121 and slides upward to the upper end of the diamond-shaped groove 121 until it contacts the right side of the triangular dial 126. Then, under the action of the return spring 114, the rotating ring 111 resets clockwise, and the limiting rod 124 enters the limiting groove. When the rotating ring 111 is rotated counterclockwise again, the limiting rod 124 disengages from the limiting groove 125 and cooperates with the other inclined surface of the triangular dial 126 to slide to the left side of the diamond-shaped groove 121. Then, the rotating ring 111 is released, and the elastic potential energy of each return spring 114 is released to push the rotating ring 111 to rotate clockwise. The limiting rod 124 returns from the left side of the diamond-shaped groove 121 to the lower end of the diamond-shaped groove 121. Compared with the prior art, in this application, when disassembling the left sleeve 3 and the right sleeve 4, only the rotating ring 111 needs to be rotated counterclockwise. When it is necessary to reset each structure, only the rotating ring 111 needs to be rotated counterclockwise again, which greatly improves the disassembly and assembly convenience of the left sleeve 3 and the right sleeve 4.

[0045] Embodiment 4:

[0046] In this embodiment, in addition to including the structural features of the foregoing embodiment, a plurality of inner arc grooves 13 are provided at intervals on the right end of the peripheral wall of the right sleeve 4, and a plurality of arc-shaped sliders 14 are provided at intervals on the inner peripheral wall of the rotating ring 111. Each arc-shaped slider 14 is respectively slidably installed in each inner arc groove 13.

[0047] In this embodiment of the present application, each arc-shaped slider 14 respectively corresponds to each reset groove 113. An outer arc groove 15 is opened at the bottom of each reset groove 113. A pair of parallel grooves 16 extending along the sliding direction of the unlocking slide plate 112 are symmetrically provided on each unlocking slide plate 112. A bolt 17 is inserted through each parallel groove 16. The lower end of each bolt 17 passes through the corresponding outer arc groove 15 and is connected to the bottom of each inner arc groove 13 through a screw hole.

[0048] As Figure 4 and Figure 5 shown, due to the adoption of the above-mentioned serpentine spring 1 coupling, when the rotating ring 111 rotates relative to the right sleeve 4, each arc-shaped slider 14 slides in the corresponding inner arc groove 13, the bolt 17 section of each bolt 17 slides in the corresponding outer arc groove 15 and the corresponding parallel groove 16, and the cross-sectional diameter of the outer end of each bolt 17 is greater than the width of each parallel groove 16.

[0049] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0050] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of the present application and without departing from the spirit and scope protected by the claims of the present application, can also make many forms, all of which fall within the protection scope of the present application.

Claims

1. A serpentine spring coupling, comprising a serpentine spring, a pair of shaft sleeves, a left sleeve body and a right sleeve body, characterized in that, The left sleeve body is fixed with a plurality of extension blocks, slots are formed between the extension blocks, the right sleeve body is provided with a plurality of slide grooves corresponding to the slots, a pair of locking plug blocks are slidably installed in each slide groove, the end of each locking plug block is plug-in-matched with the lower surface of the adjacent extension block through the slot, a thrust spring is provided between the adjacent pair of locking plug blocks, and the right sleeve body is also provided with an unlocking component, which is used to disengage and maintain each locking plug block from the corresponding slot.

2. The snake-shaped spring coupling according to claim 1, characterized in that, The card slot is arranged on the bottom surface of the extension block's extended section, and its cross-section is in the shape of a right triangle with the inclined surface facing the left sleeve body, and the ends of each locking plug block are right triangles.

3. The snake-shaped spring coupling according to claim 1, characterized in that, The unlocking assembly includes a rotating ring rotatably mounted on the peripheral wall of the right sleeve body, and a plurality of unlocking slides slidably mounted in each slot, each unlocking slide is connected to the rotating ring through a transmission assembly, and is connected to a corresponding pair of locking plugs through a pressing assembly, a plurality of reset grooves are provided on the peripheral wall of the rotating ring, the other end of each unlocking slide extends into one end of each reset groove, a reset spring is provided between the side wall and the other end of each reset groove, and a limiting assembly is provided on the inner peripheral wall of the rotating ring and the outer peripheral wall of the right sleeve body.

4. The snake-shaped spring coupling according to claim 2, wherein, The transmission assembly includes a transmission column fixed at the bottom of the reset groove, and an inclined groove and a straight groove are provided on the unlocking slide. The inclined groove is connected to the straight groove away from the left sleeve end, and the straight groove extends along the circumference of the rotating ring.

5. The snake-shaped spring coupling according to claim 2, characterized in that, The pressing assembly includes an extrusion block fixed on the top surface of the adjacent ends of a pair of adjacent locking blocks, each extrusion block is inclined toward the surface of the adjacent extension block away from the left sleeve body, each unlocking slide plate is provided with a trapezoidal groove away from the transmission assembly end, the two sides of the trapezoidal groove are inclined, and a pair of extrusion blocks are inserted in the trapezoidal groove.

6. The snake-shaped spring coupling according to claim 2, wherein The limiting component includes a diamond groove, and a straight sliding groove extending along its axis is provided on the peripheral wall of the right sleeve. A sliding block is slidably installed in the straight sliding groove, and a limit rod that slides with the diamond groove is fixed on the top of the sliding block. A limiting groove is provided at one end of the inner circle of the diamond groove, and a triangular shift block is provided on the outer circle of the same end.

7. The snake-shaped spring coupling according to claim 6, characterized in that, The limiting components are provided in plurality and are arranged at intervals along the circumferential direction.

8. The snake-shaped spring coupling according to claim 2, characterized in that, A plurality of inner arc grooves are arranged at intervals on the right end of the peripheral wall of the right sleeve body, and a plurality of arc-shaped sliding blocks are arranged at intervals on the inner peripheral wall of the rotating ring, and each arc-shaped sliding block is slidably installed in each inner arc groove.

9. The snake spring coupling according to claim 8, characterized in that, Each of the arc-shaped sliding blocks corresponds to a reset groove, and an outer arc groove is provided at the bottom of each reset groove. Each unlocking slide plate is symmetrically provided with a pair of parallel grooves extending along the sliding direction of the unlocking slide plate. A bolt is passed through each parallel groove, and the lower end of each bolt passes through the corresponding outer arc groove and is connected to the bottom of each inner arc groove through a screw hole.

10. A serpentine spring coupling according to claim 2, wherein, It also includes a plurality of plug posts, which are respectively fixed on one end of each reset groove away from the unlocking slide plate, and one end of each reset spring away from the unlocking slide plate is sleeved on the corresponding plug post.

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