CN116816798A - Bolt and nut assembly facilitating theft prevention - Google Patents

Abstract

The invention discloses a bolt and nut assembly which is beneficial to theft prevention, comprising a bolt and a nut, wherein the side wall of a third dovetail block is fixedly connected with a Z-shaped sliding rod, the elastic force of a second compression spring is far greater than that of a first compression spring, a first arc-shaped groove is obliquely arranged, the L-shaped sliding rod is in sliding connection with a second barrel body, the top end of a cross rod vertical rod passes through a T-shaped external thread cylinder and is in sliding connection with the T-shaped external thread cylinder, the bottom end of the cross rod vertical rod passes through the second barrel body and is inserted into a positioning barrel and is in sliding connection with the positioning barrel, the section of the top end of the cross rod vertical rod is an arc surface, the second barrel body is made of alloy steel materials, the wall thickness of the cross rod is 3mm-6mm, the connection mode of a fourth dovetail block and the L-shaped sliding rod is welded, the bolt and the nut can be fixed, the first barrel body needs to be repeatedly screwed for multiple times when the bolt and the nut are disassembled, the theft time is prolonged, and the use requirements are met.

Description

Bolt and nut assembly facilitating theft prevention

Technical Field

The invention relates to the technical field of theft prevention, in particular to a bolt and nut assembly which is beneficial to theft prevention.

Background

The anti-theft device has no strict meaning, can only prolong the time of unscrewing the bolt and the nut to play an anti-theft role, has an important role in daily life, has a very important role in industrial production, has a simple model and is too large in universality, so that the anti-theft performance of the bolt is very small, but in some occasions, the bolt is a first anti-theft checkpoint, and the anti-theft performance of the bolt is important; the existing anti-theft bolt has certain defects when in use, the anti-theft bolt is expensive and has small matching performance, the anti-theft performance of the anti-theft bolt is too low for daily maintenance of the anti-theft bolt, the anti-theft bolt is single in functionality and poor in practicability, and the anti-theft bolt is easily broken and split in a short time by lawless persons, so that immeasurable loss is caused, a certain influence is brought to the use process of people, and the use requirement cannot be met.

Disclosure of Invention

In order to solve the problems, the invention provides a bolt and nut assembly which is beneficial to theft prevention.

The invention is realized by the following technical scheme:

the utility model provides a help bolt nut subassembly of theftproof, includes bolt, nut, the nut cover is on the bolt and rather than assorted, the bolt is hollow structure, the bolt spiral shell head cross-section is circular, the bolt spiral shell head top surface is the inclined plane, the bolt spiral shell head internal section is regular polygon, nut bottom surface fixedly connected with staving, the interior external cross-section of staving is circular, the interior bottom surface fixed embedding of staving has a first one-way bearing, first one-way bearing inner ring rotation direction is the same with bolt tightening direction, first one-way bearing inner ring fixedly connected with montant, the montant cross-section is square, fixed cover has a first rubber ring on the montant, first rubber ring outer cambered surface is laminated with staving inner wall, the bolt spiral shell head inner paste the sliding is equipped with first staving, first staving top wear out the bolt, first staving outer cross-section is regular polygon and matches with the bolt, the interior cross-section is circular, the interior bottom surface of staving bottom surface fixed embedding has a plurality of first one-way bearings, first one-way bearing inner ring rotation direction is the same with bolt tightening direction, first dovetail inner side wall fixed block, second dovetail inner positioning block is equipped with the first dovetail, the top surface is equipped with the inside positioning block, the inside positioning block is equipped with the second dovetail, the top surface is equipped with the inside positioning block, the top surface of the first dovetail, the top surface is equipped with the inside positioning block, the top surface is equipped with the top of the first dovetail, the top end of the vertical rod penetrates into the positioning barrel and is matched with the positioning barrel, the bottom surface of the bolt is attached to the top surface of the first rubber ring, two third dovetail grooves are symmetrically formed in the inner wall of the first barrel body, a third dovetail block is attached to and slides in the third dovetail grooves, a second compression spring is arranged in the third dovetail grooves, a Z-shaped sliding rod is fixedly connected to the side wall of the third dovetail block, the elastic force of the second compression spring is far greater than that of the first compression spring, two vertical grooves are symmetrically formed in the outer cambered surface of the second barrel body, two first arc grooves are symmetrically formed in the outer cambered surface of the second barrel body, the first arc grooves are arranged between the two vertical grooves, two ends of each first arc groove are communicated with the vertical grooves, the first arc grooves are obliquely arranged, one end of each Z-shaped sliding rod penetrates into the vertical grooves, a second unidirectional bearing is fixedly embedded into one end of each Z-shaped sliding rod, the second unidirectional bearing inner ring is fixedly connected with a rotating shaft, a brake ring is fixedly sleeved on the rotating shaft, the brake ring is arranged in a vertical groove, a through hole is formed in the Z-shaped sliding rod, the through hole is arranged in the vertical groove, a bearing is fixedly connected in the second barrel, the bearing inner ring is fixedly connected with an internal thread barrel, a T-shaped external thread barrel matched with the internal thread barrel is arranged in the internal thread barrel in an attached mode, the internal section of the T-shaped external thread barrel is square, a spring is fixedly connected on the internal thread barrel, one end of the spring is fixedly connected with the inner wall of the second barrel, a brake block is fixedly embedded in the outer wall of the second barrel, the brake block is arranged below and communicated with the first arc-shaped groove, two fourth dovetail grooves are symmetrically formed in the outer wall of the internal thread barrel, a fourth dovetail block is arranged in an attached mode in a sliding mode, a third compression spring is arranged in the fourth dovetail groove, the utility model discloses a novel cross-shaped cross-bar positioning device, including fourth forked tail piece lateral wall fixedly connected with L shape slide bar, L shape slide bar cross-section is circular, second staving inner wall symmetry is opened there are two second arc grooves, the inclination of second arc groove is the same with first arc groove inclination, L shape slide bar one end inserts in the second arc groove, L shape slide bar one end passes the second staving and inserts in the perpendicular groove, L shape slide bar and second staving sliding connection, L shape slide bar and through-hole assorted, open in the second staving bottom surface has the spout, symmetrical slip is equipped with two T shape slide bars in the spout, T shape slide bar cross-section is isosceles trapezoid, laminating slip is equipped with the ring in the second staving, reduce between the ring internal diameter from bottom to top, ring bottom fixedly connected with extension spring, extension spring bottom and second staving inner bottom surface fixed connection, two T shape slide bars set up in the ring and with its intrados laminating, ring top surface fixedly connected with second rubber ring, second rubber ring sets up cross-shaped cross-bar and is equipped with two cross-shaped cross-bars and passes between two cross-shaped cross-bars and the cross-bar cross-section, the cross-bar positioning device is equipped with two cross-bars and is the cross-bar, the cross-bar positioning device is equipped with two cross-shaped cross-bar positioning device is inserted outside the cross-bar, and the cross-bar positioning device is equipped with the cross-shaped cross-bar.

Preferably, the second barrel body is made of alloy steel materials.

Preferably, the wall thickness of the cross rod is 3mm-6mm.

Preferably, the fourth dovetail block is welded with the L-shaped sliding rod in a connecting mode.

Compared with the prior art, the invention has the beneficial effects that: the device simple structure, the function is various, the practicality is strong, through setting up first forked tail piece, first compression spring, the second staving, the second forked tail piece, the location bucket, the third forked tail piece, the second compression spring, Z shape slide bar, the second one-way bearing, the rotation axis, the brake ring, a bearing, an internal thread section of thick bamboo, the T shape external thread section of thick bamboo, the clockwork spring, the brake block, the fourth forked tail piece, the third compression spring, L shape slide bar, the T shape slide bar, the ring, extension spring, second rubber ring and cross bar can realize the fixed of bolt and nut, when carrying out the dismantlement of bolt and nut, need carry out the rotatory of repeatedly twisting first staving many times, realize the split to bolt and nut, the extension steals time, improve the security performance, satisfy the user demand.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a front view of the structure of the present invention;

FIG. 3 is a cross-sectional view of the structure of FIG. 2 of the present invention;

FIG. 4 is a left side view and partial enlarged view of the structure of the present invention;

FIG. 5 is a top view of the structure of the present invention;

FIG. 6 is a cross-sectional view A-A of the structure of the present invention;

FIG. 7 is a B-B cross-sectional view of the structure of the present invention;

FIG. 8 is a block diagram of a structural component 10 according to the present invention;

FIG. 9 is an enlarged view of a portion of the structure of the present invention;

fig. 10 is a schematic working view and a partial enlarged view of the structure of the present invention.

In the figure: the bolt 1, the nut 2, the barrel 3, the first one-way bearing 4, the vertical rod 5, the first rubber ring 6, the first barrel 7, the first dovetail block 8, the first compression spring 9, the second barrel 10, the second dovetail block 11, the positioning barrel 12, the third dovetail block 13, the second compression spring 14, the Z-shaped slide bar 15, the second one-way bearing 16, the rotating shaft 17, the brake ring 18, the bearing 19, the internal thread cylinder 20, the T-shaped external thread cylinder 21, the spring 22, the brake block 23, the fourth dovetail block 24, the third compression spring 25, the L-shaped slide bar 26, the T-shaped slide bar 27, the circular ring 28, the tension spring 29, the second rubber ring 30, the cross bar 31, the first dovetail groove 1-1, the second dovetail groove 1-2, the third dovetail groove 7-1, the vertical groove 10-1, the first arc groove 10-2, the second arc groove 10-3, the slide groove 10-4, the through hole 15-1 and the fourth dovetail groove 20-1.

Detailed Description

The invention is described in further detail below with reference to the attached drawings and detailed description:

as shown in figures 1-10, the anti-theft bolt and nut assembly comprises a bolt 1 and a nut 2, wherein the nut 2 is sleeved on the bolt 1 and matched with the bolt 1, the bolt 1 is of a hollow structure, the cross section of a bolt head of the bolt 1 is circular, the top surface of the bolt head of the bolt 1 is an inclined surface, the inner cross section of the bolt head of the bolt 1 is of a regular polygon, the bottom surface of the nut 2 is fixedly connected with a barrel body 3, the inner cross section and the outer cross section of the barrel body 3 are circular, the inner bottom surface of the barrel body 3 is fixedly embedded with a first one-way bearing 4, the inner ring rotation direction of the first one-way bearing 4 is the same as the screwing direction of the bolt 1, the inner ring of the first one-way bearing 4 is fixedly connected with a vertical rod 5, the cross section of the vertical rod 5 is square, a first rubber ring 6 is fixedly sleeved on the vertical rod 5, the outer cambered surface of the first rubber ring 6 is attached to the inner wall of the barrel body 3, the inner joint sliding of the screw head of the bolt 1 is provided with a first barrel 7, the top end of the first barrel 7 penetrates out of the bolt 1, the outer cross section of the first barrel 7 is of a regular polygon and is matched with the bolt 1, the inner cross section of the first barrel 7 is circular, the inner wall of the bolt 1 is symmetrically provided with a plurality of first dovetail grooves 1-1, the inner joint sliding of the first dovetail grooves 1-1 is provided with a first dovetail block 8, the side wall of the first dovetail block 8 is fixedly connected with the outer wall of the first barrel 7, the inner joint rotation of the bolt 1 is provided with a second barrel 10, the inner bottom surface of the bolt 1 is annularly provided with a second dovetail groove 1-2, the inner joint sliding of the second dovetail groove 1-2 is provided with a plurality of second dovetail blocks 11, the top surface of the second dovetail blocks 11 is fixedly connected with the bottom surface of the second barrel 10, the inside laminating rotation of bolt 1 screw rod is equipped with location bucket 12, location bucket 12 external cross-section is circular, location bucket 12 internal cross-section is square, location bucket 12 top and second staving 10 bottom surface fixed connection, location bucket 12 bottom surface and bolt 1 bottom surface laminating, montant 5 top penetrates in the location bucket 12 and matches with it, bolt 1 bottom surface and first rubber ring 6 top surface laminating, first staving 7 inner wall symmetry is opened there are two third dovetail 7-1, laminating slip is equipped with third dovetail 13 in the third dovetail 7-1, be equipped with second compression spring 14 in the third dovetail 7-1, third dovetail 13 lateral wall fixedly connected with Z shape slide bar 15, second compression spring 14 elasticity dynamics is greater than the elasticity dynamics of first compression spring 9 far away, two vertical grooves 10-1 are symmetrically arranged on the outer arc surface of the second barrel body 10, two first arc grooves 10-2 are symmetrically arranged on the outer arc surface of the second barrel body 10, the first arc grooves 10-2 are arranged between the two vertical grooves 10-1, two ends of each first arc groove 10-2 are communicated with the vertical grooves 10-1, the first arc grooves 10-2 are obliquely arranged, one end of each Z-shaped sliding rod 15 penetrates into the corresponding vertical groove 10-1, one end of each Z-shaped sliding rod 15 is fixedly embedded with a second one-way bearing 16, the inner ring of each second one-way bearing 16 is fixedly connected with a rotating shaft 17, a brake ring 18 is fixedly sleeved on each rotating shaft 17, each brake ring 18 is arranged in each vertical groove 10-1, each Z-shaped sliding rod 15 is provided with a through hole 15-1, each through hole 15-1 is arranged in each vertical groove 10-1, each second barrel body 10 is fixedly connected with a bearing 19, the bearing 19 is fixedly connected with an inner ring of an inner threaded cylinder 20, a T-shaped outer threaded cylinder 21 matched with the inner ring of the inner threaded cylinder 20 is arranged in an attached manner, the inner cross section of the T-shaped outer threaded cylinder 21 is square, a spring 22 is fixedly connected to the inner threaded cylinder 20, one end of the spring 22 is fixedly connected with the inner wall of the second barrel 10, a brake block 23 is fixedly embedded into the outer wall of the second barrel 10, the brake block 23 is arranged below the first arc-shaped groove 10-2 and communicated with the first arc-shaped groove, two fourth dovetail grooves 20-1 are symmetrically arranged on the outer wall of the inner threaded cylinder 20, a fourth dovetail block 24 is arranged in the fourth dovetail groove 20-1 in an attached manner in a sliding manner, a third compression spring 25 is arranged in the fourth dovetail groove 20-1, an L-shaped slide bar 26 is fixedly connected to the side wall of the fourth dovetail block 24, the L-shaped slide bar 26 is circular in cross section, two second arc grooves 10-3 are symmetrically formed in the inner wall of the second barrel body 10, the inclination angle of the second arc grooves 10-3 is the same as that of the first arc groove 10-2, one end of an L-shaped slide bar 26 is inserted into the second arc groove 10-3, one end of the L-shaped slide bar 26 penetrates through the second barrel body 10 and is inserted into a vertical groove 10-1, the L-shaped slide bar 26 is in sliding connection with the second barrel body 10, the L-shaped slide bar 26 is matched with a through hole 15-1, a sliding groove 10-4 is formed in the inner bottom surface of the second barrel body 10, two T-shaped slide bars 27 are symmetrically arranged in the sliding groove 10-4 in a sliding manner, the cross bar section of the T-shaped slide bar 27 is isosceles trapezoid, a circular ring 28 is arranged in the second barrel body 10 in an attaching sliding manner, the inner diameter of the circular ring 28 is reduced from bottom to top, a stretching spring 29 is fixedly connected to the bottom surface of the circular ring 28, the bottom of the extension spring 29 is fixedly connected with the inner bottom surface of the second barrel body 10, two T-shaped sliding rods 27 are arranged in the circular ring 28 and are attached to the inner cambered surface of the second barrel body, a second rubber ring 30 is fixedly connected to the top surface of the circular ring 28, the second rubber ring 30 is arranged below the L-shaped sliding rods 26, a cross rod 31 is attached between the transverse rods of the two T-shaped sliding rods 27, two ends of the transverse rod of the cross rod 31 are inclined planes, the top end of a vertical rod of the cross rod 31 penetrates through the T-shaped external thread barrel 21 and is in sliding connection with the T-shaped external thread barrel 21, the bottom end of the vertical rod of the cross rod 31 penetrates through the second barrel body 10 and is inserted into the positioning barrel 12 and is in sliding connection with the positioning barrel 12, and the cross rod is provided with the cross rod and the cross rod, and the section of the top end of the vertical rod of the cross rod 31 is a cambered surface.

The second barrel body 10 is made of alloy steel materials.

The cross bar 31 has a wall thickness of 3mm-6mm.

The fourth dovetail block 24 is welded to the L-shaped slide bar 26.

Working principle: when the equipment needs to be fixed to prevent theft, the device is used for tightening and fixing instead of the traditional bolt and nut, firstly, the bolt 1 is moved to pass through a preformed hole of the equipment, the bolt 1 is arranged outside the equipment, then the nut 2 is moved to the other side of the equipment, the nut 2 drives the barrel 3 to move, the barrel 3 drives the first one-way bearing 4 to move, the first one-way bearing 4 drives the vertical rod 5 to move and insert into the positioning barrel 12, then the nut 2 is rotated, the nut 2 drives the barrel 3 to rotate, at the moment, the rotating direction of the barrel 3 is the same as the rotating direction of an outer ring of the first one-way bearing 4, the barrel 3 drives the outer ring of the first one-way bearing 4 to rotate, the movement is stopped when the surface of the nut 2 is attached to the surface of the equipment, the equipment is fixed, as shown in figure 1, the arrangement of the first rubber ring 6 prevents the vertical rod 5 from causing non-artificial rotation, and a thief steals, the first barrel 7 is clamped and then the first barrel 7 is screwed anticlockwise, the first barrel 7 drives the first dovetail block 8 to rotate, the first dovetail block 8 drives the bolt 1 to rotate, the bolt 1 is gradually separated from the nut 2 after rotating, the first barrel 7 drives the third dovetail block 13 to rotate, the third dovetail block 13 drives the Z-shaped slide bar 15 to rotate, the Z-shaped slide bar 15 drives the second barrel 10 to rotate, the second barrel 10 drives the positioning barrel 12 to rotate, the positioning barrel 12 drives the vertical rod 5 to rotate, the vertical rod 5 drives the inner ring of the first one-way bearing 4 to rotate, at the moment, the rotating direction of the vertical rod 5 is opposite to the rotating direction of the inner ring of the first one-way bearing 4, the inner ring of the first one-way bearing 4 cannot rotate so that the vertical rod 5 cannot rotate, the positioning barrel 12 cannot rotate so that the second barrel 10 cannot rotate, at this time, the first barrel body 7 continuously indirectly drives the Z-shaped slide bar 15 to rotate, the Z-shaped slide bar 15 slides in the first arc-shaped groove 10-2, the Z-shaped slide bar 15 drives the second one-way bearing 16 to slide, the second one-way bearing 16 drives the rotating shaft 17 to slide, the rotating shaft 17 drives the brake ring 18 to rotate on the brake block 23, the brake ring 18 drives the rotating shaft 17 to rotate, the rotating shaft 17 drives the inner ring of the second one-way bearing 16 to rotate, the one-way rotation of the rotating shaft 17 is ensured by the arrangement of the second one-way bearing 16, the brake ring 18 only can rotate in one direction, the first barrel body 7 is prevented from moving upwards to reset during the rotation, the first arc-shaped slide bar 10-2 drives the Z-shaped slide bar 15 to gradually move downwards due to the inclined arrangement of the first arc-shaped groove 10-2, the Z-shaped slide bar 15 drives the third dovetail block 13 to move downwards, the third dovetail block 13 drives the first barrel 7 to move downwards and gradually slide into the bolt 1, the first barrel 7 drives the first dovetail block 8 to move downwards and squeeze the first compression spring 9 to deform, the Z-shaped slide bar 15 gradually slides from the first arc-shaped groove 10-2 to the bottom end of the vertical groove 10-1, the Z-shaped slide bar 15 drives the through hole 15-1 to slide and gradually sleeve the L-shaped slide bar 26, the first barrel 7 moves downwards and is jointed with the cross bar 31 to push the cross bar 31 to move, the cross bar 31 pushes the two T-shaped slide bars 27 to move in a counter-rotating manner, the T-shaped slide bar 27 pushes the circular ring 28 to move upwards and pull the tension spring 29 to deform, the circular ring 28 drives the second rubber ring 30 to move upwards and be jointed with the surface of the L-shaped slide bar 26 to squeeze the L-shaped slide bar 26, the L-shaped slide bar 26 is prevented from rotating in an unintended manner, when the first barrel 7 slides into the bolt 1, at this time, the inner top surface of the first barrel 7 is attached to the top surface of the T-shaped external thread cylinder 21, as shown in fig. 10, the first barrel 7 slides and is separated from the clamping device, the L-shaped slide bar 26 limits the Z-shaped slide bar 15 so that the Z-shaped slide bar 15 cannot move upwards, the Z-shaped slide bar 15 cannot move so that the third dovetail block 13 cannot move, the third dovetail block 13 cannot move so that the first barrel 7 cannot move, then the first barrel 7 needs to be pressed, the first barrel 7 drives the second compression spring 14 to move downwards, the second compression spring 14 drives the third dovetail block 13 to move downwards, the third dovetail block 13 drives the Z-shaped slide bar 15 to move downwards, the Z-shaped slide bar 15 cannot move at this time, the first barrel 7 moves downwards at this time to squeeze the second compression spring 14 to deform, the first barrel 7 pushes the T-shaped external thread cylinder 21 and the cross bar 31 to move respectively, the cross rod 31 indirectly drives the second rubber ring 30 to move to continuously extrude the L-shaped slide rod 26 to perform braking operation, the T-shaped external thread cylinder 21 moves downwards to drive the internal thread cylinder 20 to rotate so as to gradually screw the spring 22, the internal thread cylinder 20 drives the fourth dovetail block 24 to rotate, the fourth dovetail block 24 drives the L-shaped slide rod 26 to rotate in the second arc-shaped groove 10-3, the fourth dovetail block 24 drives the L-shaped slide rod 26 to rotate downwards due to the inclination of the second arc-shaped groove 10-3, the L-shaped slide rod 26 gradually rotates to slide out of the through hole 15-1 to cancel the limit of the Z-shaped slide rod 15, then the first barrel 7 is loosened, the extruded second compression spring 14 pushes the first barrel 7 to move upwards, the first barrel 7 moves upwards to gradually separate from the T-shaped external thread cylinder 21, the second rubber ring 30 at the moment limits the L-shaped slide rod 26 so that the L-shaped slide rod 26 cannot rotate, the L-shaped slide bar 26 cannot rotate so that the fourth dovetail block 24 cannot rotate, the fourth dovetail block 24 cannot rotate so that the internal thread cylinder 20 cannot rotate, the screwed spring 22 cannot rotate so that the internal thread cylinder 20 is reset, the first dovetail block 8 is pushed by the extruded first compression spring 9, the first barrel 7 is driven to move upwards and gradually slide out of the bolt 1 by pushing the first dovetail block 8, the first barrel 7 moves upwards and gradually separates from the top surface of the cross bar 31, the deformed extension spring 29 drives the circular ring 28 to move, the circular ring 28 pushes the two T-shaped slide bars 27 to move oppositely, the T-shaped slide bars 27 push the cross bar 31 to move and reset, the circular ring 28 drives the second rubber ring 30 to move gradually to separate from the L-shaped slide bars 26 so as to cancel the limit of the L-shaped slide bars 26, the L-shaped slide bars 26 can rotate, the screwed spring 22 drives the internal thread cylinder 20 to rotate, the internal thread cylinder 20 indirectly drives the L-shaped slide bar 26 to rotate for resetting, the first compression spring 9 pushes the first dovetail block 8 to move for resetting, the first dovetail block 8 drives the first barrel 7 to move for resetting, then the first barrel 7 is clamped for rotating, the first barrel 7 is required to be clamped for a plurality of times, the first barrel 7 is rotated and the first barrel 7 is pressed, so that the amplitude movement of the first barrel 7 is realized, the first barrel 7 indirectly drives the bolt 1 to rotate and separate from the nut 2, the stealing time is prolonged, the use requirement is met, the arrangement of the first unidirectional bearing 4 and the second unidirectional bearing 16 ensures the unidirectional rotation of the device, the arrangement of the first compression spring 9, the second compression spring 14, the third compression spring 25 and the extension spring 29 plays an effective resetting role, the normal operation of the device is ensured, the arrangement of the positioning barrel 12 plays a limiting role on the cross rod 31, the cross bar 31 is prevented from rotating.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. The utility model provides a help bolt nut subassembly of theftproof, includes bolt (1), nut (2) cover is on bolt (1) and rather than assorted, bolt (1) is hollow structure, bolt (1) spiral shell head cross-section is circular, bolt (1) spiral shell head top surface is the inclined plane, bolt (1) spiral shell head internal cross-section is regular polygon, nut (2) bottom surface fixedly connected with staving (3), the inside and outside cross-section of staving (3) is circular, the fixed embedding of staving (3) internal bottom surface has first one-way bearing (4), first one-way bearing (4) inner ring direction of rotation is the same with bolt (1) tightening direction, first one-way bearing (4) inner ring fixedly connected with montant (5), montant (5) cross-section is square, fixed cover has first rubber ring (6) on montant (5), first rubber ring (6) extrados and staving (3) inner wall laminating, its characterized in that: the utility model discloses a bolt, including bolt (1) head, first staving (7) are equipped with to fit in the head of bolt (1) slip, bolt (1) are worn out on first staving (7) top, first staving (7) outer cross-section is regular polygon and with bolt (1) phase-match, first staving (7) inner cross-section is circular, a plurality of first dovetail (1-1) are opened to bolt (1) inner wall symmetry, fit in first dovetail (1-1) and slide and be equipped with first dovetail (8), first dovetail (8) lateral wall and first staving (7) outer wall fixed connection, be equipped with first compression spring (9) in first dovetail (1-1), the inner joint rotation of the bolt (1) is provided with a second barrel body (10), the inner bottom surface of the bolt (1) is annularly provided with a second dovetail groove (1-2), a plurality of second dovetail blocks (11) are arranged in the second dovetail groove (1-2) in a joint sliding manner, the top surface of the second dovetail blocks (11) is fixedly connected with the bottom surface of the second barrel body (10), the inner joint rotation of a screw rod of the bolt (1) is provided with a positioning barrel (12), the outer cross section of the positioning barrel (12) is circular, the inner cross section of the positioning barrel (12) is square, the top end of the positioning barrel (12) is fixedly connected with the bottom surface of the second barrel body (10), the positioning barrel (12) bottom surface is attached to the bolt (1) bottom surface, the top end of the vertical rod (5) penetrates into the positioning barrel (12) and is matched with the positioning barrel, the bottom surface of the bolt (1) is attached to the top surface of the first rubber ring (6), two third dovetail grooves (7-1) are symmetrically formed in the inner wall of the first barrel (7), a third dovetail block (13) is arranged in the third dovetail groove (7-1) in an attached sliding mode, a second compression spring (14) is arranged in the third dovetail groove (7-1), a Z-shaped sliding rod (15) is fixedly connected to the side wall of the third dovetail block (13), the elastic force of the second compression spring (14) is far greater than that of the first compression spring (9), two vertical grooves (10-1) are symmetrically formed in the outer arc surface of the second barrel (10), two first arc grooves (10-2) are symmetrically formed in the outer arc surface of the second barrel (10), the first arc grooves (10-2) are arranged between the two vertical grooves (10-1), one ends of the first arc grooves (10-2) are fixedly connected with the Z-shaped sliding rod (15), one ends of the first arc grooves (10-1) are fixedly connected with the Z-shaped sliding rod (15), the inner ring of the second unidirectional bearing (16) is fixedly connected with a rotating shaft (17), a brake ring (18) is fixedly sleeved on the rotating shaft (17), the brake ring (18) is arranged in a vertical groove (10-1), a through hole (15-1) is formed in a Z-shaped sliding rod (15), the through hole (15-1) is arranged in the vertical groove (10-1), a bearing (19) is fixedly connected in the second barrel (10), an inner ring of the bearing (19) is fixedly connected with an inner threaded cylinder (20), a T-shaped outer threaded cylinder (21) matched with the inner threaded cylinder is arranged in the inner threaded cylinder (20), the inner cross section of the T-shaped outer threaded cylinder (21) is square, a spring (22) is fixedly connected to the inner threaded cylinder (20), one end of the spring (22) is fixedly connected with the inner wall of the second barrel (10), a brake pad (23) is fixedly embedded in the outer wall of the second barrel (10), the brake pad (23) is arranged below the first barrel (10-2), a fourth dovetail groove (20) is formed in the inner arc groove (20), a fourth dovetail groove (20) is formed in the fourth arc groove (20), the side wall of the fourth dovetail block (24) is fixedly connected with an L-shaped slide bar (26), the cross section of the L-shaped slide bar (26) is circular, two second arc grooves (10-3) are symmetrically formed in the inner wall of the second barrel body (10), the inclination angle of the second arc grooves (10-3) is the same as that of the first arc grooves (10-2), one end of the L-shaped slide bar (26) is inserted into the second arc grooves (10-3), one end of the L-shaped slide bar (26) penetrates through the second barrel body (10) to be inserted into the vertical groove (10-1), the L-shaped slide bar (26) is in sliding connection with the second barrel body (10), the L-shaped slide bar (26) is matched with the through hole (15-1), the inner bottom surface of the second barrel body (10) is provided with a chute (10-4), two T-shaped sliding rods (27) are symmetrically arranged in the chute (10-4) in a sliding way, the cross rod section of each T-shaped sliding rod (27) is isosceles trapezoid, a circular ring (28) is arranged in the second barrel body (10) in a fitting way in a sliding way, the inner diameter of the circular ring (28) is reduced from bottom to top, the bottom surface of the circular ring (28) is fixedly connected with a tension spring (29), the bottom end of the tension spring (29) is fixedly connected with the inner bottom surface of the second barrel body (10), the two T-shaped sliding rods (27) are arranged in the circular ring (28) and are attached to the inner cambered surface of the circular ring, the utility model discloses a cross bar structure, including L shape slide bar (26), ring (28) top surface fixedly connected with second rubber ring (30), second rubber ring (30) set up in L shape slide bar (26) below, laminating between two T shape slide bar (27) horizontal poles is equipped with cross bar (31), cross bar (31) horizontal pole both ends are the inclined plane, in T shape external screw thread section of thick bamboo (21) are passed on cross bar (31) montant top and rather than sliding connection, second staving (10) are passed and insert in location bucket (12) and with two sliding connection to cross bar (31) montant bottom, cross bar (31) montant top cross section is the cambered surface.

2. A theft-resistant bolt and nut assembly as recited in claim 1, further comprising: the second barrel body (10) is made of alloy steel materials.

3. A theft-resistant bolt and nut assembly as recited in claim 1, further comprising: the wall thickness of the cross rod (31) is 3mm-6mm.

4. A theft-resistant bolt and nut assembly as recited in claim 1, further comprising: and the fourth dovetail block (24) and the L-shaped slide bar (26) are connected in a welding mode.