CN220168331U - High strength screw fastener - Google Patents

Abstract

The utility model discloses a high-strength screw fastener, which relates to the technical field of screws and comprises a screw main body, a screw cap, a screwing unit and a nut unit; the screw main body is vertically arranged, and the upper end of the screw main body is fixedly connected with the middle part of the lower end of the screw cap; the screwing unit comprises an inner hexagonal groove, a sliding groove, an auxiliary block, a first sliding groove, a fixed block and a limiting assembly, wherein the limiting assembly is arranged at the front end and the rear end of the nut; the nut unit is installed at the outer side of the screw body. Be equipped with nut and interior hexagonal groove, can select one of two kinds of instruments of suitable size just can twist and use the screw, and just can install the nut unit in the screw main part according to the mode of installing ordinary nut, prevent through the closely laminating in rubber block deformation and the screw main part outside that the nut breaks away from the screw main part, it is more convenient, cooperate spacing subassembly again through the sliding connection of auxiliary block and spout in addition, make the use of auxiliary block more convenient stable and difficult fracture inefficacy.

Description

High strength screw fastener

Technical Field

The utility model relates to the technical field of screws, in particular to a high-strength screw fastener.

Background

The screw is a tool for progressively fastening a machine part by utilizing the physical and mathematical principles of the inclined plane circular rotation and friction force of an object, is a universal expression of a fastener, is a common utility model in the production and life of thousands of years, and is a first large utility model of human beings according to the application field;

the prior art discloses a compressor high strength screw fastener of publication number CN218454879U, comprising: a screw body; the movable groove is formed in the screw body; the outer hexagonal screw cap is fixed at the top of the screw body; the inner hexagonal driving groove is formed in the top of the outer hexagonal screw cap; the inner hexagon screw cap is rotationally connected to the bottom of the inner wall of the inner hexagon driving groove;

the screw is troublesome to use, at least two kinds of size tools are needed, an anti-falling assembly is needed to be additionally connected, one end of the driving block is rotatably connected with the operation groove, and the driving block is easy to break and lose efficacy in use, so that a high-strength screw fastener is proposed.

Disclosure of Invention

The utility model aims to overcome the prior art, and provides a high-strength screw fastener which is provided with a nut and an inner hexagonal groove, one of two tools with proper sizes can be selected to screw a screw for use, a nut unit can be arranged on a screw main body in a mode of installing a common nut, the nut is prevented from being separated from the screw main body through the tight fit between the deformation of a rubber block and the outer side of the screw main body, the screw fastener is more convenient, and in addition, the use of an auxiliary block is more convenient and stable, the auxiliary block is not easy to break and lose efficacy through the sliding connection of the auxiliary block and a chute, and the problems in the background art can be effectively solved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the high-strength screw fastener comprises a screw main body, a screw cap, a screwing unit and a nut unit;

a screw main body: the screw is vertically arranged, and the upper end of the screw main body is fixedly connected with the middle part of the lower end of the screw cap;

screwing unit: the nut comprises an inner hexagonal groove, a sliding groove, auxiliary blocks, a first sliding groove, a fixed block and a limiting component, wherein the inner hexagonal groove is formed in the upper end of the nut, the sliding groove is formed in the middle of the lower end of the inner hexagonal groove, the sliding groove penetrates through the front end and the rear end of the nut, the sliding groove is respectively in sliding connection with the two auxiliary blocks, the lower ends of the fixed blocks are fixedly connected to the front side and the rear side of the inner lower end of the sliding groove, the first sliding groove is formed in the middle of the lower end of the auxiliary block, the first sliding groove is respectively in sliding connection with the fixed block, and the limiting component is arranged at the front end and the rear end of the nut;

nut unit: is arranged on the outer side of the screw main body.

The screw main body and the nut are made of high-strength materials such as duplex stainless steel and the like, the auxiliary block is limited in the sliding groove through the limiting component, so that an inner hexagonal groove on the nut is formed, the screw main body can be screwed and used by selecting one of two tools which are suitable for the sizes of the nut and the inner hexagonal groove, the nut is arranged on the screw main body in a mode of installing an ordinary nut and limited by the nut unit, the nut is prevented from being separated from the screw main body, when the nut and the screw main body are inconvenient to screw and detach due to corrosion and rust in long-time use, the auxiliary block slides outwards along the sliding groove, the auxiliary block is limited by the first sliding groove and the fixed block, the auxiliary block is connected with the nut in a reinforcing mode, the possibility that the auxiliary block is separated from the sliding groove in use is reduced, the auxiliary block is limited by the limiting component, the auxiliary block is prevented from being retracted into the sliding groove in use, the nut and the screw main body is rotated by screwing other tools, and the nut and the screw main body are convenient to detach.

Further, spacing subassembly contains axis of rotation, baffle, accomodates groove, stopper, spout two and first draw-in groove, the inner of both ends upside fixedly connected with axis of rotation around the nut, and the outer end rotation of axis of rotation is connected with the one end of baffle, accomodate the groove around the inside upper end of spout, and accomodate groove and stopper sliding connection, spout two has been seted up at the upper end middle part of supplementary piece, and stopper and spout two sliding connection, first draw-in groove has been seted up to the lower extreme inboard of spout two, and the lower extreme joint of first draw-in groove and stopper.

Through axis of rotation supporting baffle, limit the auxiliary block in the spout through the baffle to form the interior hexagonal groove on the nut, when needing to use the auxiliary block, swing baffle breaks away from the auxiliary block, and when outside slip auxiliary block, the stopper slides in spout two, and when the auxiliary block was slided to the assigned position, the stopper was in accomodating the inslot and the first draw-in groove of downward slip joint, thereby fix the auxiliary block in the assigned position, prevented that the auxiliary block from returning back in the spout when using.

Further, the screwing unit further comprises a V-shaped groove, the upper side of the inner end of the auxiliary block is an inclined plane, and the two inclined planes are matched to form the V-shaped groove. When the auxiliary block is corroded and rusted for a long time, the auxiliary block can be corroded on the sliding groove or the two auxiliary blocks are corroded together, so that the auxiliary block is inconvenient to move, the auxiliary block can be separated and moved in the sliding groove by using a flat tool to knock down the V-shaped groove, and the auxiliary block can be used.

Further, the nut unit contains nut, fixed plate, logical groove, gag lever post, side groove, limiting plate and circular slot, the outside of screw main part and the middle part internal thread connection of nut, and the lower extreme left and right sides fixedly connected with fixed plate's of nut upper end, logical groove has been seted up at the middle part of fixed plate, and logical groove and gag lever post swing joint, the side groove has been seted up to both sides about the middle part of fixed plate, and side groove and logical groove intercommunication, both sides fixedly connected with limiting plate's inner about the middle part of gag lever post, and limiting plate and side groove sliding connection, the circular slot that corresponds with the side groove has been seted up to the inner of fixed plate, and limiting plate and circular slot swing joint.

The limiting plate is supported by the limiting rod, the nut is mounted on the screw body in a mode of mounting an ordinary nut, the limiting rod is pushed inwards to enable the limiting plate to be separated from the side groove, the limiting plate is located in the circular groove at the moment, the inner end of the limiting rod is in contact with the outer side of the screw body, the limiting rod is rotated to enable the limiting plate to rotate in the circular groove, and therefore the position of the limiting rod is fixed, and the nut is prevented from being separated from the screw body through contact friction between the limiting rod and the outer side of the screw body.

Further, the nut unit still contains the rubber piece, the inner of gag lever post rotates the outer end that is connected with the rubber piece, and the inner of rubber piece and the outside contact of screw main part, shallow slot has been seted up to the outer end of circular slot, and shallow slot and side groove perpendicular distribution, shallow slot and limiting plate's outer end joint.

When the limiting rod moves inwards, the rubber block contacts with the outer side of the screw body, the limiting rod is pushed inwards continuously to deform the rubber block, so that the rubber block is in closer contact with the screw body, the limiting rod is rotated to enable the limiting plate to correspond to the shallow groove, the limiting plate is clamped in the shallow groove through the elastic force of the rubber block, the limiting plate is prevented from rotating to the side groove to enable the rubber block to be separated from the screw body, when the nut is required to be separated from the screw body, the limiting rod is pushed inwards to enable the limiting plate to be separated from the shallow groove, the limiting rod is rotated reversely to enable the limiting plate to rotate to the side groove, and the limiting rod is pulled outwards to enable the rubber block to be separated from the screw body, so that the nut can be disassembled reversely rotated.

Further, still include protective housing, elastic clamping plate, second draw-in groove and friction line, the lower extreme of protective housing corresponds with the upper end of nut, and the upper end of both sides fixedly connected with elastic clamping plate around the inboard upper end of protective housing, the second draw-in groove has been seted up to both ends upside around the inboard in interior hexagonal groove, and the lower extreme and the second draw-in groove joint of elastic clamping plate, the friction line has evenly been seted up in the outside of protective housing.

After the screw is arranged at the appointed fastening position, the protection shell is sleeved on the screw cap, the elastic clamping plate is clamped in the second clamping groove, the screw cap is protected through the protection shell, meanwhile, the corrosion speed of the inner part of the screw cap is slowed down, and the protection shell is detached through friction lines by using a vice or other tools.

Compared with the prior art, the utility model has the beneficial effects that: this high strength screw fastener has following benefit:

1. when the screw cap and the screw main body are inconvenient to screw and detach due to corrosion and rust generated during long-time use, the auxiliary block outwards slides to a designated position along the sliding groove, the first sliding groove and the fixed block limit the auxiliary block and strengthen the connection between the auxiliary block and the screw cap, so that the possibility that the auxiliary block is separated from the sliding groove during use is reduced, and meanwhile, the limiting block downwards slides in the storage groove and is clamped into the first clamping groove, so that the auxiliary block is fixed at the designated position, the auxiliary block is prevented from returning into the sliding groove during use, and the screw cap and the screw main body are rotated by screwing the auxiliary block by using other tools, so that the screw cap and the screw main body are convenient to detach;

2. according to the method, a nut is arranged on a screw main body in a mode of installing an ordinary nut, a limiting rod is pushed inwards to enable a limiting plate to be separated from a side groove, a rubber block contacts with the outer side of the screw main body, and the limiting rod is pushed inwards to enable the rubber block to deform, so that the rubber block is in closer contact with the screw main body, the nut is prevented from being separated from the screw main body, the limiting rod is rotated to enable the limiting plate to correspond to a shallow groove, the limiting plate is clamped in the shallow groove through the elastic force of the rubber block, and therefore the limiting plate is prevented from rotating to the side groove to enable the rubber block to be separated from the screw main body;

3. be equipped with nut and interior hexagonal groove, can select one of two kinds of instruments of suitable size just can twist and use the screw, and just can install the nut unit in the screw main part according to the mode of installing ordinary nut, prevent through the closely laminating in rubber block deformation and the screw main part outside that the nut breaks away from the screw main part, it is more convenient, cooperate spacing subassembly again through the sliding connection of auxiliary block and spout in addition, make the use of auxiliary block more convenient stable and difficult fracture inefficacy.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a partial enlarged structure of the portion A in FIG. 1 according to the present utility model;

fig. 3 is a schematic view of the bottom structure of the present utility model.

In the figure: 1 a screw main body, 2 nuts, 3 screwing units, 31 an inner hexagonal groove, 32 a sliding groove, 33 an auxiliary block, 34 a sliding groove I, 35 a fixed block, 36 a rotating shaft, 37 a baffle plate, 38 a storage groove, 39 a limiting block, 310 a sliding groove II, 311 a first clamping groove, 312V-shaped grooves, 4 nut units, 41 nuts, 42 a fixed plate, 43 a through groove, 44 a limiting rod, 45 side grooves, 46 limiting plates, 47 round grooves, 48 rubber blocks, 5 a protective shell, 6 elastic clamping plates, 7 a second clamping groove and 8 friction lines.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the present embodiment provides a technical solution: the high-strength screw fastener comprises a screw main body 1, a nut 2, a screwing unit 3 and a nut unit 4;

screw body 1: is vertically arranged, and the upper end of the screw main body 1 is fixedly connected with the middle part of the lower end of the screw cap 2;

screwing unit 3: the nut comprises an inner hexagonal groove 31, a sliding groove 32, auxiliary blocks 33, a first sliding groove 34, a fixed block 35 and a limiting component, wherein the inner hexagonal groove 31 is formed in the upper end of the nut 2, the sliding groove 32 is formed in the middle of the lower end of the inner hexagonal groove 31, the sliding groove 32 penetrates through the front end and the rear end of the nut 2, the sliding groove 32 is respectively connected with the two auxiliary blocks 33 in a sliding manner, the lower ends of the fixed block 35 are fixedly connected to the front side and the rear side of the inner lower end of the sliding groove 32, the first sliding groove 34 is formed in the middle of the lower end of the auxiliary block 33, the first sliding groove 34 is respectively connected with the fixed block 35 in a sliding manner, and the limiting component is arranged at the front end and the rear end of the nut 2;

the spacing subassembly contains axis of rotation 36, baffle 37, accomodate groove 38, stopper 39, spout two 310 and first draw-in groove 311, the inner of axis of rotation 36 is fixedly connected with to both ends upside around the nut 2, and the outer end rotation of axis of rotation 36 is connected with the one end of baffle 37, accomodate groove 38 has been seted up to both sides around the inside upper end of spout 32, and accomodate groove 38 and stopper 39 sliding connection, spout two 310 have been seted up at the upper end middle part of auxiliary block 33, and stopper 39 and spout two 310 sliding connection, first draw-in groove 311 has been seted up to the lower extreme inboard of spout two 310, and first draw-in groove 311 and the lower extreme joint of stopper 39.

The baffle plate 37 is supported by the rotating shaft 36, the auxiliary block 33 is limited in the chute 32 by the baffle plate 37, so that the inner hexagonal groove 31 on the nut 2 is formed, when the auxiliary block 33 is needed to be used, the swinging baffle plate 37 is separated from the auxiliary block 33, the limiting block 39 slides in the chute two 310 when the auxiliary block 33 slides outwards, and when the auxiliary block 33 slides to a designated position, the limiting block 39 slides downwards in the storage groove 38 and is clamped in the first clamping groove 311, so that the auxiliary block 33 is fixed at the designated position, and the auxiliary block 33 is prevented from being retracted into the chute 32 when in use.

The screwing unit 3 further comprises a V-shaped groove 312, the upper side of the inner end of the auxiliary block 33 is an inclined surface, and the two inclined surfaces are matched to form the V-shaped groove 312. The auxiliary block 33 may be rusted on the sliding groove 32 or the two auxiliary blocks 33 may be rusted together when the auxiliary block 33 is corroded and rusted for a long time, so that the auxiliary block 33 is inconvenient to move, the auxiliary block 33 can be separated and moved in the sliding groove 32 by using a flat tool to knock down the V-shaped groove 312, and the auxiliary block 33 can be used.

Nut unit 4: is arranged on the outer side of the screw main body 1; the nut unit 4 comprises a nut 41, a fixed plate 42, a through groove 43, a limiting rod 44, a side groove 45, a limiting plate 46 and a round groove 47, wherein the outer side of the screw body 1 is in threaded connection with the middle part of the nut 41, the left side and the right side of the lower end of the nut 41 are fixedly connected with the upper end of the fixed plate 42, the through groove 43 is formed in the middle part of the fixed plate 42, the through groove 43 is movably connected with the limiting rod 44, the side groove 45 is formed in the upper side and the lower side of the middle part of the fixed plate 42, the side groove 45 is communicated with the through groove 43, the inner end of the limiting plate 46 is fixedly connected with the upper side and the lower side of the middle part of the limiting rod 44, the limiting plate 46 is in sliding connection with the side groove 45, the round groove 47 corresponding to the side groove 45 is formed in the inner end of the fixed plate 42, and the limiting plate 46 is movably connected with the round groove 47.

The limiting plate 46 is supported by the limiting rod 44, the nut 41 is mounted on the screw body 1 in a mode of mounting a common nut, the limiting rod 44 is pushed inwards to enable the limiting plate 46 to be separated from the side groove 45, the limiting plate 46 is located in the circular groove 47 at the moment, the inner end of the limiting rod 44 is in contact with the outer side of the screw body 1, the limiting rod 44 is rotated to enable the limiting plate 46 to rotate in the circular groove 47, so that the position of the limiting rod 44 is fixed, and the nut 41 is prevented from being separated from the screw body 1 through contact friction between the limiting rod 44 and the outer side of the screw body 1.

The nut unit 4 further comprises a rubber block 48, the inner end of the limiting rod 44 is rotatably connected with the outer end of the rubber block 48, the inner end of the rubber block 48 is in contact with the outer side of the screw body 1, a shallow groove is formed in the outer end of the round groove 47, the shallow groove is vertically distributed with the side groove 45, and the shallow groove is clamped with the outer end of the limiting plate 46.

When the limiting rod 44 moves inwards, the rubber block 48 contacts the outer side of the screw body 1, the limiting rod 44 is pushed inwards continuously to deform the rubber block 48, so that the rubber block 48 contacts the screw body 1 more tightly, the limiting rod 44 is rotated to enable the limiting plate 46 to correspond to the shallow groove, the limiting plate 46 is clamped in the shallow groove through the elasticity of the rubber block 48, the limiting plate 46 is prevented from rotating to the side groove 45 to enable the rubber block 48 to be separated from the screw body 1, when the nut 41 is required to be separated from the screw body 1, the limiting rod 44 is pushed inwards to enable the limiting plate 46 to be separated from the shallow groove, the limiting rod 44 is rotated reversely to enable the limiting plate 46 to rotate to the side groove 45, and the limiting rod 44 is pulled outwards to enable the rubber block 48 to be separated from the screw body 1, so that the nut 41 can be disassembled in a reverse rotation mode.

The screw body 1 and the nut 2 are made of high-strength materials such as duplex stainless steel, the auxiliary block 33 is limited in the sliding groove 32 through the limiting component, so that an inner hexagonal groove 31 on the nut 2 is formed, the screw body 1 can be screwed by selecting one of two tools which are suitable for the sizes of the nut 2 and the inner hexagonal groove 31, the nut 41 is mounted on the screw body 1 in a mode of mounting a common nut, the nut 41 is limited through the nut unit 4, the nut 41 is prevented from being separated from the screw body 1, the auxiliary block 33 slides outwards along the sliding groove 32 when the nut 2 and the screw body 1 are inconvenient to screw and detach after long-time use and corrosion rust is generated, the auxiliary block 33 is limited through the first sliding groove 34 and the fixed block 35, the connection between the auxiliary block 33 and the nut 2 is enhanced, the possibility that the auxiliary block 33 is separated from the sliding groove 32 when in use is reduced, the auxiliary block 33 is limited through the limiting component, the nut 2 and the screw body 1 are prevented from rotating by screwing the auxiliary block 33 through other tools when the other tools in the sliding groove 32, and the nut 2 and the screw body 1 are convenient to detach.

Still include protective housing 5, elastic clamping plate 6, second draw-in groove 7 and friction line 8, the lower extreme of protective housing 5 corresponds with the upper end of nut 2, and the upper end of both sides fixedly connected with elastic clamping plate 6 around the inboard upper end of protective housing 5, second draw-in groove 7 has been seted up to both ends upside around the inboard of interior hexagonal groove 31, and the lower extreme and the second draw-in groove 7 joint of elastic clamping plate 6, friction line 8 has evenly been seted up in the outside of protective housing 5.

After the screw is arranged at the appointed fastening position, the protective shell 5 is sleeved on the screw cap 2, the elastic clamping plate 6 is clamped in the second clamping groove 7, the screw cap 2 is protected through the protective shell 5, meanwhile, the corrosion speed of the inner part of the screw cap 2 is slowed down, and the protective shell 5 is detached through the friction line 8 by using a vice or other tools.

The working principle of the high-strength screw fastener provided by the utility model is as follows: the auxiliary block 33 is limited in the chute 32 through the baffle 37 so as to form an inner hexagonal groove 31 on the nut 2, the screw main body 1 can be screwed by selecting one of two tools which are suitable for the sizes of the nut 2 and the inner hexagonal groove 31, the nut 41 is arranged on the screw main body 1 in a mode of installing a common nut, the limiting rod 44 is pushed inwards so that the limiting plate 46 is separated from the side groove 45, the rubber block 48 contacts the outer side of the screw main body 1, the limiting rod 44 is pushed inwards continuously so that the rubber block 48 deforms, the contact between the rubber block 48 and the screw main body 1 is tighter, the nut 41 is prevented from being separated from the screw main body 1, the limiting plate 46 corresponds to the shallow groove by rotating the limiting rod 44, the limiting plate 46 is blocked in the shallow groove by the elastic force of the rubber block 48, the limiting plate 46 is prevented from rotating to the side groove 45 so that the rubber block 48 is separated from the screw main body 1, the protective shell 5 is sleeved on the nut 2, the elastic clamping plate 6 is clamped in the second clamping groove 7, the nut 2 is protected through the protective shell 5, meanwhile, the corrosion speed of the parts in the nut 2 is slowed down, when the nut 2, the screw main body 1 and the nut 41 are inconvenient to screw and disassemble due to corrosion and rust during long-time use, the protective shell 5 is conveniently detached by using a vice or other tools through the friction lines 8, the limiting rod 44 is pushed inwards to separate the limiting plate 46 from the shallow groove, the limiting rod 44 is rotated reversely to rotate the limiting plate 46 to the side groove 45, the limiting rod 44 is pulled outwards to separate the rubber block 48 from the screw main body 1, so that the nut 41 can be rotated, the swinging baffle 37 is separated from the auxiliary block 33, the auxiliary block 33 is separated and moves in the sliding groove 32 by aligning the V-shaped groove 312 through using a flat tool, the auxiliary block 33 slides outwards along the sliding groove 32, the limiting block 39 slides in the sliding groove 310, when the auxiliary block 33 slides to the designated position, the limiting block 39 slides downwards in the accommodating groove 38 and is clamped into the first clamping groove 311, so that the auxiliary block 33 is fixed at the designated position, the auxiliary block 33 is prevented from retreating into the sliding groove 32 when in use, the auxiliary block 33 is limited through the first sliding groove 34 and the fixed block 35, the auxiliary block 33 is connected with the nut 2, the possibility that the auxiliary block 33 is separated from the sliding groove 32 when in use is reduced, and the nut 2 and the screw body 1 are rotated by screwing the auxiliary block 33 by using other tools, so that the nut 2, the screw body 1 and the nut 41 are convenient to detach.

The foregoing is only illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, and all equivalent structures or equivalent flow modifications which may be made by the teachings of the present utility model and the accompanying drawings or which may be directly or indirectly employed in other related art are within the scope of the utility model.

Claims (6)

1. High strength screw fastener, its characterized in that: comprises a screw main body (1), a screw cap (2), a screwing unit (3) and a nut unit (4);

screw main body (1): is vertically arranged, and the upper end of the screw main body (1) is fixedly connected with the middle part of the lower end of the screw cap (2);

screwing unit (3): the nut comprises an inner hexagonal groove (31), a sliding groove (32), auxiliary blocks (33), a first sliding groove (34), a fixed block (35) and a limit component, wherein the inner hexagonal groove (31) is formed in the upper end of the nut (2), the sliding groove (32) is formed in the middle of the lower end of the inner hexagonal groove (31), the sliding groove (32) penetrates through the front end and the rear end of the nut (2), the sliding groove (32) is respectively connected with the two auxiliary blocks (33) in a sliding manner, the lower ends of the fixed block (35) are fixedly connected to the front side and the rear side of the inner lower end of the sliding groove (32), the first sliding groove (34) is formed in the middle of the lower end of the auxiliary block (33), the first sliding groove (34) is respectively connected with the fixed block (35) in a sliding manner, and the limit component is arranged at the front end and the rear end of the nut (2);

nut unit (4): is arranged outside the screw main body (1).

2. The high strength screw fastener of claim 1, wherein: the limiting component comprises a rotating shaft (36), a baffle (37), a storage groove (38), a limiting block (39), a sliding groove II (310) and a first clamping groove (311), wherein the upper sides of the front end and the rear end of the nut (2) are fixedly connected with the inner end of the rotating shaft (36), the outer end of the rotating shaft (36) is rotationally connected with one end of the baffle (37), the storage groove (38) is formed in the front side and the rear side of the inner upper end of the sliding groove (32), the storage groove (38) is in sliding connection with the limiting block (39), a sliding groove II (310) is formed in the middle of the upper end of the auxiliary block (33), the limiting block (39) is in sliding connection with the sliding groove II (310), the first clamping groove (311) is formed in the inner side of the lower end of the sliding groove II (310), and the first clamping groove (311) is in clamping connection with the lower end of the limiting block (39).

3. The high strength screw fastener of claim 1, wherein: the screwing unit (3) further comprises a V-shaped groove (312), the upper side of the inner end of the auxiliary block (33) is an inclined plane, and the two inclined planes are matched to form the V-shaped groove (312).

4. The high strength screw fastener of claim 1, wherein: the nut unit (4) contains nut (41), fixed plate (42), logical groove (43), gag lever post (44), side groove (45), limiting plate (46) and circular slot (47), the outside of screw main part (1) and the middle part internal thread connection of nut (41), and the upper end of fixed plate (42) is fixedly connected with in the lower extreme left and right sides of nut (41), logical groove (43) have been seted up at the middle part of fixed plate (42), and logical groove (43) and gag lever post (44) swing joint, side groove (45) have been seted up in the middle part upper and lower both sides of fixed plate (42), and side groove (45) and logical groove (43) intercommunication, the inner of limiting plate (46) are fixed connection in the middle part upper and lower both sides of gag lever post (44), and limiting plate (46) and side groove (45) sliding connection, circular slot (47) corresponding with side groove (45) are seted up to the inner of fixed plate (42), and limiting plate (46) and circular slot (47) swing joint.

5. The high strength screw fastener of claim 4, wherein: the nut unit (4) further comprises a rubber block (48), the inner end of the limiting rod (44) is rotationally connected with the outer end of the rubber block (48), the inner end of the rubber block (48) is in contact with the outer side of the screw main body (1), a shallow groove is formed in the outer end of the round groove (47), the shallow groove and the side groove (45) are vertically distributed, and the shallow groove is clamped with the outer end of the limiting plate (46).

6. The high strength screw fastener of claim 1, wherein: still include protective housing (5), elastic clamping plate (6), second draw-in groove (7) and friction line (8), the lower extreme of protective housing (5) corresponds with the upper end of nut (2), and the upper end of both sides fixedly connected with elastic clamping plate (6) around the inboard upper end of protective housing (5), second draw-in groove (7) have been seted up to both ends upside around the inboard of interior hexagonal groove (31), and the lower extreme and the second draw-in groove (7) joint of elastic clamping plate (6), friction line (8) have evenly been seted up in the outside of protective housing (5).