CN212738500U

CN212738500U - Novel rotor wing strut with rotary wing capable of steering

Info

Publication number: CN212738500U
Application number: CN202021551241.2U
Authority: CN
Inventors: 卢增浩; 谢文亮; 李冲
Original assignee: Fujian Zhongli Technology Co ltd
Current assignee: Fujian Zhongli Technology Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-03-19
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a novel rotor wing strut with a rotor wing capable of steering, the rotor wing strut is of a two-section structure comprising a main body pole section and an outer end section, the main body pole section and the outer end section are both tubular poles, the connection between the main body pole section and the outer end section is connected through a rotating connection structure which can enable the outer end section to rotate around the axis of the rotor wing strut, the end part of the other end of the main body pole section is provided with a turning connection structure capable of steering and moving, the structure of the outer end section and the main body pole section can enable the outer end section to rotate through the rotating connection structure to change the direction of the rotor wing positioned on the outer end section so as to protect the rotor wing, the rotating connection structure can change the rotatable or fixed relation between the main body pole section and the outer end section through simple operation, the quick disassembly, installation and fixation can be achieved on the premise that the steering movement of the rotor wing strut is not hindered through the turning connection structure, and, make things convenient for rotor branch and unmanned aerial vehicle packing transportation.

Description

Novel rotor wing strut with rotary wing capable of steering

Technical Field

The utility model relates to an unmanned aerial vehicle field.

Background

Along with the rapid development of unmanned aerial vehicle technique, the function that unmanned aerial vehicle can realize is more and more used, uses unmanned aerial vehicle to replace also more and more generally of work, and unmanned aerial vehicle on the existing market is of a great variety, and big small structure according to its usage respectively has the difference.

Present most unmanned aerial vehicle's rotor branch all is direct fixed mounting on unmanned aerial vehicle's fuselage, this kind of rotor branch need occupy more space when unmanned out of work uses, especially some large-scale unmanned aerial vehicle's rotor branch, very be unfavorable for accomodating of unmanned aerial vehicle and place, rotor branch can receive its accident such as colliding with and then damage rotor branch, and when selling the packing, if direct complete machine packing not only pack the transportation because the volume is great lead to the fact in the trouble outside, still receive the damage easily.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel rotor branch that rotor can turn to can make rotor branch can turn to the setting of activity and just can realize dismantling the installation fast fixedly on unmanned aerial vehicle.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a novel rotor branch that rotor can turn to, rotor branch includes main part pole section and outer end section for two segmentation structures, main part pole section and outer end section are the tubulose pole, be connected between main part pole section and the outer end section through can making the outer end section around rotor branch axial lead pivoted rotation connection structure and connect, be equipped with the turn connection structure that can turn to the activity on the tip of the other end of main part pole section.

The rotary connecting structure comprises a central shaft tube, a first clamping ring, a return spring and a positioning sleeve; the positioning sleeve comprises a sleeve ring, a connecting rod and a positioning push block, wherein the annular surface on one side of the sleeve ring extends outwards in the axial direction, and the positioning push block is arranged on the outer end of the connecting rod; the two ends of the central shaft tube respectively penetrate through the end parts of the main body rod section and the outer end section, second clamping rings are respectively and convexly arranged on the outer peripheral surfaces of sections penetrating into the main body rod section and the outer end section, and the first clamping rings are respectively and fixedly arranged on the inner side walls of the main body rod section and the outer end section and are clamped with the corresponding second clamping rings to prevent the central shaft tube from falling off; the lantern ring is sleeved outside the middle shaft in the main body rod section, a telescopic opening axially and inwardly extending from the end face of the main body rod section is formed in the side wall of the main body rod section, the positioning push block is embedded in the telescopic opening, and a positioning opening axially and inwardly extending from the end face of the outer end section is formed in the side wall of the outer end section and used for the positioning push block to be embedded; the inner side wall of the main body rod section is provided with a step surface, and two ends of the reset spring are respectively propped against the end surface and the step surface on one side of the lantern ring; and movable openings for the connecting rod to penetrate through a movable space are correspondingly formed in the second clamping ring and the two first clamping rings arranged in the main rod section.

The turning connecting structure is a limiting convex grain arranged on the end part of the main body rod section, the limiting convex grain is arranged on the end part of the main body rod section through an elastic structure, a through hole for the limiting convex grain to penetrate through is formed in the end part of the main body rod section, and a clamping edge is formed on the outer side wall of one end, penetrating through the through hole, of the limiting convex grain in the main body rod section; the elastic structure comprises a connecting ring, a spring and a spring sleeve, wherein the connecting ring is embedded in a through hole and sleeved outside the limited convex particle, a clamping ring for clamping the outer edge of the through hole is formed on the edge of the connecting ring outside the through hole, the connecting ring penetrates through the end face of one end of the through hole in the main body rod section to support the clamping edge and is provided with an external thread on the outer side wall of the clamping edge, the spring sleeve is of a closed pipe sleeve structure with one end used for inserting the spring into the opening and the other end used for matching and screwing the external thread on the connecting ring, and the two ends of the spring are respectively supported on the clamping edge of one end of the spring sleeve and the limited convex particle.

By adopting the technical scheme, the beneficial effects of the utility model are that: rotor branch in above-mentioned structure sets up the accessible for the structure of outer end section and main part pole section and rotates connection structure and makes the outer end section rotate and change the direction that is located the rotor on the outer end section thereby the protection rotor can not receive the collision and increases the stability of structure, only need can reach the relation that changes rotatable or fixed between main part pole section and the outer end section through the position that changes the location ejector pad in rotating connection structure, only need can reach the relation that changes rotatable or fixed between main part pole section and the outer end section through the position that changes the location ejector pad during the use, it is simple and stable in structure in the aspect of the operation to use.

In addition, the limited convex grain among the turn connection structure can cooperate with the locating hole that supplies spacing convex grain cooperation embedding location of seting up on unmanned aerial vehicle's the fuselage, make rotor branch can realize turning to the activity around limiting the convex grain, realize rotor branch to the fuselage side turn to accomodate and reach the occupation space that reduces rotor branch, and can make to press down and prescribe a limit to the convex grain and make it break away from locating hole detachable lift rotor branch or when installing will prescribe a limit to the convex grain and push away to the locating hole then prescribe a limit to the convex grain because of the elastic construction effect can automatic block in the locating hole, and then realize not hindering rotor branch to turn to reach quick dismantlement installation fixed under the prerequisite of activity.

Drawings

Fig. 1 is a schematic structural diagram of an unmanned aerial vehicle convenient for accommodating packages according to the present invention;

fig. 2 is the utility model relates to a structure schematic diagram of unmanned aerial vehicle's support frame convenient to accomodate packing.

Fig. 3 is the utility model relates to an unmanned aerial vehicle's rotation connection structure's section structure schematic diagram convenient to accomodate packing.

Fig. 4 is an exploded view of the utility model relates to an unmanned aerial vehicle's rotation connection structure convenient to accomodate packing.

Fig. 5 is a section view of the turning connection structure of the unmanned aerial vehicle convenient for accommodating the package.

Fig. 6 is the utility model relates to a structure schematic diagram of an unmanned aerial vehicle's unilateral support frame convenient to accomodate packing.

In the figure: 1-a fuselage; 11-an inner groove; 111-rotor slots; 112-strut grooves; 113-a plug groove; 12-a camera slot; 13-a turning plug-in structure; 131-circular holes; 132-inner end positioning holes; 133-outer end positioning holes; 134-a communication groove; 135-a limit bump; 136-a turning table; 14-a hinge connection structure; 141-defining raised grains; 1411-card edge; 142-perforating; 143-connecting ring; 144-a spring; 145-spring housing; 2-a rotor strut; 21-a body shaft section; 22-an outer end section; 23-a rotating connection; 231-a central shaft tube; 232-a first snap ring; 233-a return spring; 234-positioning sleeve; 2341-a collar; 2342-connecting rod; 2343-positioning the push block; 235-a second snap ring; 236-a positioning port; 237-a telescoping port; a movable port-238; a locking bolt-239; 3-a rotor wing; 4-a support frame; 41-single side support frame; 411-bottom rail; 412-support rods; 4121-a lower support section; 4122-upper support section; 413-an elastic connecting rod; 4131-middle bar; 4132-rubber hook arm; 42-a linking structure; 5-a camera;

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.

The utility model discloses a novel rotor wing support rod with a rotary wing capable of steering by disclosing an unmanned aerial vehicle convenient for containing and packaging, as shown in figure 1, figure 2, figure 3, figure 4, figure 5 and figure 6, comprising a body 1, four rotor wing support rods 2 arranged on the body 1 and extending to the periphery, a rotary wing 3 arranged on the outer end of the rotor wing support rods 2, and a support frame 4 and a camera 5 arranged on the bottom of the body 1, the unmanned aerial vehicle of the utility model is different from the existing unmanned aerial vehicle in that two wings on the same side edge of the four rotor wing support rods 2 can be folded towards the side edge of the body 1 in opposite directions, inner grooves 11 for folding and embedding the rotor wing support rods 2 and the rotary wing 3 are arranged on the opposite side edges (on the left side and the right side as shown in the figure), a containing space is provided for folding and containing the rotor wing support rods and the rotary wing, a camera groove 12 is arranged on, the camera 5 is connected with the camera slot 12 through a telescopic connection structure (not shown in the figure) which can be movably embedded into the camera slot 12 or extend out of the camera slot 12, the camera 5 is driven to move by the telescopic connection structure so that the camera 5 can be hidden and retracted in the machine body 1 when not in use, the telescopic connection structure and the camera slot 12 are not the main improvement points of the scheme, the structure is not specifically explained here, and the clear understanding of the technical scheme of the improvement of the scheme by the technical personnel in the field is not influenced, the support frames 4 are two unilateral support frames 41 which are respectively and symmetrically arranged at two sides of the camera slot 12 and respectively correspond to the inner slots 11 at two sides of the machine body 1, the two unilateral support frames 41 are hinged on the machine body 1 through a connection structure 42 which can be upwards overturned towards one side of the corresponding machine body 1, the connection structure 42 can be a simple hinge structure formed by hinging a rotating shaft sleeve and a rotating shaft, so that the unilateral support frame can upwards overturn around the, when unmanned aerial vehicle is not using, can pack up the both sides limit at the fuselage with the outside upset that makes progress of two unilateral support frames 41, can hold the rotor branch that this fuselage both sides were folded up, pack up the whole occupation volume that reduces of back unmanned aerial vehicle, conveniently accomodate the packing and carry, then turn over two unilateral support frames 41 downwards when unmanned aerial vehicle uses and form the support frame 4 that can support the balanced stand of unmanned aerial vehicle, combine the concrete structure and the position relation at each position of figure specification below.

As shown, the inner recess 11 includes a rotor slot 111, a strut slot 112 and a plug slot 113 that communicate with each other, the rotor slots 111 correspond to the middle section of the side of the fuselage 1, the strut slots 112 are symmetrically arranged at both ends (upper and lower ends as shown in the figure) of the rotor slots 111, the insertion grooves 113 are respectively formed by turning the end parts of the strut grooves 112 to extend into the machine body 1 to form a hole structure, the inserting groove 113 is provided with a turning inserting structure 13 for the end part of the rotor wing support rod 2 to be turned and fixedly connected in an inserting way, when the unmanned aerial vehicle is stored, but rotor branch 2 the opposite direction of same side folds up to the side of fuselage 1, and rotor 3 corresponds the embedding in rotor groove 111, and rotor branch 2 embedding is in branch groove 112, and inserting groove 113 is then that unmanned aerial vehicle rotor branch 2 expandes the back and supplies its tip to insert the structure realization rotor branch 2 and inserting groove 113's fixed connection of rethread turn inserting structure 13 including establishing when using.

Further, the rotor wing strut 2 is a two-section structure including a main body pole section 21 connecting the body 1 and an outer end section 22 for the rotor wing 3 to be installed, the main body pole section 21 and the outer end section 22 are both tubular poles, a circuit of the rotor wing can be arranged in the tubular poles in a penetrating manner, the main body pole section 21 and the outer end section 22 are connected through a rotating connecting structure 23 which can enable the outer end section 22 to rotate around the axis of the rotor wing strut 2, the main body pole section 21 and the body 1 are connected through a turning connecting structure 14 which can enable the main body pole section 21 to turn to the side edge of the body 1, when the rotor wing strut 2 is stored, the outer end section 22 can be rotated 90 degrees through the rotating connecting structure 23 to be vertical to the previous state, so that the rotor wing strut 2 and the rotor wing 3 can be better embedded into the strut 112 and the rotor wing groove 111, as shown in the figure, the depth of the rotor wing groove 111 is greater than the strut groove 112, and the rotor wing after rotation is correspondingly embedded into the depth position, the rotor strut 2 is not exposed outside the inner recess.

As shown in the drawings, the rotary connection structure 23 in the above structure includes a central shaft tube 231, a first snap ring 232, a return spring 233 and a positioning sleeve 234; the positioning sleeve 234 comprises a sleeve ring 2341, a connecting rod 2342 extending axially outwards from one side annular surface of the sleeve ring 2341, and a positioning push block 2343 arranged on the outer end of the connecting rod 2342; the two ends of the middle shaft tube 231 respectively penetrate from the end parts of the main body rod section 21 and the outer end section 22, second snap rings 235 are respectively and convexly arranged on the outer peripheral surfaces of sections penetrating into the main body rod section 21 and the outer end section 22, the first snap rings 232 are respectively fixedly arranged on the inner side walls of the main body rod section 21 and the outer end section 22 and clamped with the corresponding second snap rings 235 to prevent the middle shaft tube 231 from falling off, the main body rod section 21 and the outer end section 22 are connected together through the middle shaft tube 231 through the arrangement that the first snap rings 232 and the second snap rings 235 are clamped with each other, and the outer end section 22 can rotate relative to the main body rod section 21; the lantern ring 2341 is sleeved outside the central axis tube 231 in the main body rod section 21, a telescopic opening 237 axially and inwardly extending from the end face of the main body rod section 21 is formed in the side wall of the main body rod section 21, the positioning push block 2343 is embedded in the telescopic opening 237, and a positioning opening 236 axially and inwardly extending from the end face of the outer end section 22 is formed in the side wall of the outer end section 22 and used for the positioning push block 2343 to be embedded in; the inner side wall of the main body rod section 21 is provided with a step surface, two ends of the return spring 233 respectively abut against the end surface and the step surface of one side of the sleeve ring 2341, and the return spring 233 provides thrust for the sleeve ring 2341, so that the positioning push block 2343 cannot slide out randomly when being embedded into the positioning opening 236; when the main body rod section 21 is fixedly connected with the outer end section 22 through the structure, the positioning push block 2343 is positioned in the positioning hole 236 of the outer end section 22 and clamped with the side edge of the positioning hole 236, so that the outer end section 22 is prevented from rotating; when the outer end section 22 needs to rotate, the positioning push block 2343 is pushed to exit the positioning opening 236 and retract into the telescopic opening 237, the positioning push block 2343 is no longer clamped with the side edge of the positioning opening 236, so that the outer end section 22 can rotate around the axis, the positioning opening 236 no longer corresponds to the telescopic opening 237 after the outer end section 22 rotates, the return spring 233 provides acting force for the collar 2341 to enable the positioning push block 2343 on the connecting rod 2342 of the collar 2341 to be abutted against the edge of the outer end section 22, and when the outer end section 22 rotates to the position where the positioning opening 236 corresponds to the telescopic opening 237, the positioning push block 2343 is pushed into the positioning opening 236 by the acting force of the return spring 233, so that the outer end section 22 is locked and prevented from rotating continuously.

As shown in the figure, in order to make the connection between the end of the rotor wing strut 2 and the insertion slot 113 can be turned and fixedly connected, the turning insertion structure 13 is that the hole structure of the insertion slot 113 is a circular hole 131, the upper and lower opposite central positions of the inner end of the insertion slot 113 are respectively provided with an inner end positioning hole 132, the outer end of the insertion slot 113 is provided with an upper and lower opposite turning platform 136, the upper and lower opposite turning platforms 136 are respectively provided with an outer end positioning hole 133 corresponding to the inner end positioning hole 132, a communication slot 134 communicating the two positioning holes is provided between the two positioning holes on the same side between the inner end and the outer end of the insertion slot 113, the outer end face of one end of the main body strut section 21 connected with the insertion slot 113 is connected with the two positioning holes and the communication slot 134 through the turning connection structure 14, the inner side face of the turning platform 136 is provided with a limit, when the rotor wing support rod 2 rotates around the folding table 136 to abut against the limit bump 135 through the arrangement of the limit bump 135, the end part of the rotor wing support rod 2 just corresponds to the circular hole 131, so that the rotor wing support rod 2 is conveniently inserted into the circular hole 131, and a quick positioning and guiding effect is provided for the installation of the rotor wing support rod 2, the axial line position of the folding table 136 corresponding to the outer end positioning hole 133 and the communication groove 134 is provided with a threaded through hole, a locking bolt 239 is screwed in the threaded through hole, the inner end of the locking bolt 239 is an abutting end, the outer end of the locking bolt 239 is a rotating end provided with a rotating handle, when the unmanned aerial vehicle is turned from a storage state to a use state, the rotor wing support rod 2 is pulled out of the support rod groove 112, the end part of the rotor wing support rod 2 is connected through the folding connection structure 14 to rotate around the folding table 136, and is pushed into the circular hole 131 after being abutted against by the, in the process, when the limiting convex particles 141 slide from the outer end positioning holes 133 to the communication grooves 134 and then to the inner end positioning holes 132, namely the inserting and fixing positions, the rotating handle is rotated to enable the propping end of the locking bolt 239 to prop against the outer circumferential surface of the rotor wing support rod 2, so that the fixing of the rotor wing support rod 2 is completed, and the mode of folding is that any component is not disassembled, so that the folding or unfolding operation is very simple and convenient, and no misoperation occurs.

As shown in the figure, the turning connection structure 14 is that a limiting convex particle 141 embedded in an outer end positioning hole 133, a communication groove 134 and an inner end positioning hole 132 to slide and limit a position is arranged on an outer end surface of one end of the main body rod section 21, which is connected with the insertion groove 113, the limiting convex particle 141 is arranged on an end portion of the main body rod section 21 through an elastic structure, a through hole 142 for the limiting convex particle 141 to penetrate through is arranged on the end portion of the main body rod section 21, and a clamping edge 1411 is formed on an outer side wall of one end of the main body rod section 21, where the limiting convex particle 141 penetrates through the through hole 142; the elastic structure comprises a connecting ring 143, a spring 144 and a spring sleeve 145, the connecting ring 143 is embedded in the through hole 142 and sleeved outside the limit convex particle 141, a snap ring for clamping the outer edge of the through hole 142 is formed on the edge of the connecting ring 143 outside the through hole 142, the end face of one end of the connecting ring 143 penetrating through the through hole 142 in the main body rod section 21 is used for propping against the snap ring 1411, and is provided with an external thread on the outer side wall thereof, the spring sleeve 145 is of a pipe sleeve structure with one end being an opening for embedding the spring 144 and the other end being a closing, the inner side wall of the opening of the spring sleeve 145 is provided with an internal thread matched and screwed with the external thread on the connecting ring 143, the two ends of the spring 144 are respectively propped against the closing end of the spring sleeve 145 and the snap ring 1 for limiting the convex particle 141, the limit convex particle 141 is arranged in the spring sleeve 145, and the external thread on the connecting ring 143 is screwed with the, the clamp edges 1411 on the limited convex particles 141 are abutted against the connecting ring 143 to prevent the limited convex particles 141 from falling off the spring sleeve 145, the spring 144 arranged in the spring sleeve 145 provides acting force to enable the clamp edges 1411 of the limited convex particles 141 to be abutted against the connecting ring 143, and when the main body rod section 21 is connected with the insertion groove 113, the limited convex particles 141 can be embedded into the outer end positioning hole 133, the communication groove 134 and the inner end positioning hole 132 to slide so as to limit the position of the main body rod section 21 and enable the main body rod section 21 to rotate around the limited convex particles 141.

In this embodiment, as shown in the drawings, the single-side supporting frame 41 includes a bottom cross bar 411, supporting rods 412 and an elastic connecting rod 413 symmetrically connected to two ends of the bottom cross bar 411, where the supporting rods 412 include a lower supporting section 4121 with a lower end connected to an end of the bottom cross bar 411 and an upper supporting section 4122 with a lower end connected to an upper end of the lower supporting section 4121, the upper end of the upper supporting section is hinged to the bottom of the body 1, an upper cross bar is connected between the lower ends of the two upper supporting sections, the elastic connecting rod 413 is used to connect two corresponding upper supporting sections of the two single-side supporting frames 41 and includes a middle rod 4131 and rubber hook arms 4132 hinged to two ends of the middle rod 4131, one end of the rubber hook arm 4132 is hinged to an end of the middle rod 4131, and the other end thereof is a hook portion capable of tightly hooking the upper supporting section, when the supporting frame 4 is in use, two ends of the elastic connecting rod 413 are, connect two fixed unilateral support frames 41 through elastic connection pole 413, make two unilateral support frames 41 form the support frame 4 that can support unmanned aerial vehicle to stand, rubber on elastic connection pole 413 colludes arm 4132 and can make unmanned aerial vehicle when descending the impact force of slow reduction support frame 4 and bottom surface contact play the effect of buffering, when not using, elastic connection pole 413 hangs on last horizontal pole through the portion of colluding at both ends, two unilateral support frames 41 can be respectively around the pin joint of last support section upwards overturn can hold the rotor branch of folding up in this fuselage both sides, and the end horizontal pole 411 of two unilateral support frames 41 then forms the portable arm that can conveniently mention with the hand, reach the effect of convenient transport, it turns over to turn over to receive and has reduced the whole volume of unmanned aerial vehicle, thereby make things convenient for unmanned aerial vehicle's transportation.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.

Claims

1. The utility model provides a novel rotor branch that rotor can turn to which characterized in that: the rotor branch includes main part pole section and outer end section for two segmentation structures, main part pole section and outer end section are the tubulose pole, be connected between main part pole section and the outer end section through can making the outer end section around rotor branch axial lead pivoted rotation connection structure connect, be equipped with on the tip of the other end of main part pole section and turn connection structure that can turn to the activity.

2. A novel rotor mast for a rotor-steerable rotor according to claim 1, wherein: the rotary connecting structure comprises a central shaft tube, a first clamping ring, a return spring and a positioning sleeve; the positioning sleeve comprises a sleeve ring, a connecting rod and a positioning push block, wherein the annular surface on one side of the sleeve ring extends outwards in the axial direction, and the positioning push block is arranged on the outer end of the connecting rod; the two ends of the central shaft tube respectively penetrate through the end parts of the main body rod section and the outer end section, second clamping rings are respectively and convexly arranged on the outer peripheral surfaces of sections penetrating into the main body rod section and the outer end section, and the first clamping rings are respectively and fixedly arranged on the inner side walls of the main body rod section and the outer end section and are clamped with the corresponding second clamping rings to prevent the central shaft tube from falling off; the lantern ring is sleeved outside the middle shaft in the main body rod section, a telescopic opening axially and inwardly extending from the end face of the main body rod section is formed in the side wall of the main body rod section, the positioning push block is embedded in the telescopic opening, and a positioning opening axially and inwardly extending from the end face of the outer end section is formed in the side wall of the outer end section and used for the positioning push block to be embedded; the inner side wall of the main body rod section is provided with a step surface, and two ends of the reset spring are respectively propped against the end surface and the step surface on one side of the lantern ring; and movable openings for the connecting rod to penetrate through a movable space are correspondingly formed in the second clamping ring and the two first clamping rings arranged in the main rod section.

3. A novel rotor mast for a rotor-steerable rotor according to claim 1, wherein: the turning connecting structure is a limiting convex grain arranged on the end part of the main body rod section, the limiting convex grain is arranged on the end part of the main body rod section through an elastic structure, a through hole for the limiting convex grain to penetrate through is formed in the end part of the main body rod section, and a clamping edge is formed on the outer side wall of one end, penetrating through the through hole, of the limiting convex grain in the main body rod section; the elastic structure comprises a connecting ring, a spring and a spring sleeve, wherein the connecting ring is embedded in a through hole and sleeved outside the limited convex particle, a clamping ring for clamping the outer edge of the through hole is formed on the edge of the connecting ring outside the through hole, the connecting ring penetrates through the end face of one end of the through hole in the main body rod section to support the clamping edge and is provided with an external thread on the outer side wall of the clamping edge, the spring sleeve is of a closed pipe sleeve structure with one end used for inserting the spring into the opening and the other end used for matching and screwing the external thread on the connecting ring, and the two ends of the spring are respectively supported on the clamping edge of one end of the spring sleeve and the limited convex particle.