CN113446298A - Anti-theft fastening bolt and nut thereof - Google Patents

Anti-theft fastening bolt and nut thereof Download PDF

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Publication number
CN113446298A
CN113446298A CN202110794639.1A CN202110794639A CN113446298A CN 113446298 A CN113446298 A CN 113446298A CN 202110794639 A CN202110794639 A CN 202110794639A CN 113446298 A CN113446298 A CN 113446298A
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China
Prior art keywords
nut
bolt
magnet
hole
movable plate
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Granted
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CN202110794639.1A
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Chinese (zh)
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CN113446298B (en
Inventor
吴自明
曹威
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Jiangsu Yongya Automobile Accessory Co ltd
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Individual
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Priority to CN202110794639.1A priority Critical patent/CN113446298B/en
Publication of CN113446298A publication Critical patent/CN113446298A/en
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Publication of CN113446298B publication Critical patent/CN113446298B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/041—Specially-shaped shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002—Measures against loss of bolts, nuts or pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/005—Measures against unauthorised operation of bolts, nuts or pins

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

The invention belongs to the technical field of fasteners, in particular to an anti-theft fastening bolt and a nut thereof, which comprise a bolt and a nut; the outer surface of the circumference of the bolt is uniformly provided with threads; a plurality of first sliding grooves are uniformly formed in the outer surface of the circumference of the bolt; the first sliding groove penetrates through the screw teeth; a plurality of second sliding grooves are uniformly formed in the surface of one side, close to the central axis of the nut, of the nut; the surface of one side of the second chute, which is close to the outer part of the screw cap, is elastically connected with a movable plate through a first spring; the movable plate is fixedly connected with a first magnet at one side close to the outer surface of the nut; the outer surface of the nut is provided with a circular groove; a through hole is formed in the circular groove; the through hole is communicated with the second chute and is opposite to the first magnet; a second magnet is connected in the through hole in a sliding manner; the bolt and nut fastening device is simple in structure, can realize fastening and taking down of the bolt and the nut, and effectively prevents lawless persons from taking down the bolt and the nut.

Description

Anti-theft fastening bolt and nut thereof
Technical Field
The invention belongs to the technical field of fasteners, and particularly relates to an anti-theft fastening bolt and a nut thereof.
Background
The nut is the nut, the part that is used for playing the fastening effect together with bolt or screw rod is twisted, bolt and nut are often used in the open air in daily life, can lead to some lawless persons to dismantle bolt and nut here, be used for obtaining illegal income, mostly adopt to fix bolt and nut extremely for preventing lawless persons from stealing in prior art, can't take off, with this when the part damages and faces the maintenance, need to amputate the bolt, and can lead to damaging other spare parts of part and lead to the part to scrap in the excision process, and most bolt and nut are put in the open air, easily rust, lead to being difficult to separating both.
Some technical schemes of anti-theft fastening bolts and nuts thereof also appear in the prior art, for example, a chinese patent with application number cn202110017888.x discloses an anti-theft fastening bolt and nut thereof, which comprises a base, a fastened piece, a stud, a nut, a stopper, an elastic element and an elastic pad; although the device has restricted demolising of nut, plays the effect of theftproof, but the later stage need amputate the bolt when maintaining the device, has increased work load, and probably leads to the damage to the part at the in-process of amputating the bolt, is unfavorable for the maintenance to spare part.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that most of the prior art adopts the mode that a bolt and a nut are fixed and cannot be taken down to prevent illegal persons from stealing, so that the bolt needs to be cut off when parts are damaged and face maintenance, other parts of the parts can be damaged in the cutting process, the parts are scrapped, most of the bolts and the nuts are placed outdoors and are easy to rust, and the two parts are difficult to separate.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to an anti-theft fastening bolt and a nut thereof, which comprise a bolt and a nut; the outer surface of the circumference of the bolt is uniformly provided with threads; a plurality of first sliding grooves are uniformly formed in the outer surface of the circumference of the bolt; the first sliding groove penetrates through the screw teeth; the bolt is connected with the nut through threads; a plurality of second sliding grooves are uniformly formed in the surface of one side, close to the central axis of the nut, of the nut; the surface of one side of the second chute, which is close to the outer part of the screw cap, is elastically connected with a movable plate through a first spring; the movable plate is fixedly connected with a first magnet at one side close to the outer surface of the nut; the outer surface of the nut is provided with a circular groove; a through hole is formed in the circular groove; the through hole is communicated with the second chute and is opposite to the first magnet; a second magnet is connected in the through hole in a sliding manner;
when the screw is in work, the bolt is not in threaded connection with the nut in an initial state; because the elastic force of the first spring is greater than the friction force between the movable plate and the second chute, the first spring pushes the movable plate to move towards the direction close to the central axis of the nut, and the surface of the movable plate on one side far away from the through hole exceeds the surface of the inner ring of the nut;
when a part needs to be fastened with a nut through a bolt, a second magnet is installed inside the through hole, the attraction force of the second magnet to the first magnet is larger than the friction force between the movable plate and the second chute and the elasticity of the first spring to the movable plate, at the moment, the movable plate moves towards the direction close to the through hole, when the movable plate stops moving, the surface of one side of the movable plate close to the central axis of the nut completely enters the inside of the second chute, at the moment, the operation is also carried out on the outer surface of the nut in other directions, then, the bolt can be screwed into the nut through a wrench, in the process, the part of the second magnet far away from the through hole completely enters the circular groove, the surface of one side of the second magnet far away from the central axis of the nut is parallel to the outer surface of the corresponding nut, and the first magnet and the second magnet attract each other, so that when the nut is screwed by the wrench, the first magnet cannot fall from the inside of the through hole, and the second magnet cannot be damaged when the wrench works, so that the service life of the parts is effectively ensured, and the rectangular through hole is designed, so that the possibility that lawbreakers directly attract the first magnet through a magnet of a common type can be effectively reduced, and then the bolt and the nut are separated, so that the parts are lost (the through hole has other shapes and is also within the protection range of the wrench); after the parts are fastened, the second magnets are taken down, at the moment, the movable plate enters the first sliding groove due to the fact that the elastic force of the first spring is larger than the friction force between the movable plate and the second sliding groove, the movable plate is attached to the outer surface of the bolt on the side surface close to the central axis of the nut, part of the movable plate is inserted into the first sliding groove, the other part of the movable plate is still located inside the second sliding groove, and therefore the movable plate is used for limiting and clamping the screw teeth, the bolt cannot be unscrewed from the nut, and the property of the unscrewed bolt is effectively prevented from being stolen by lawless persons; when the parts are fastened and the first sliding groove does not correspond to the movable plate, the bolt is unscrewed after the second magnet is inserted into the through hole, and the rubber gasket is added between the bolt and the nut until the first sliding groove corresponds to the position of the movable plate; when the part is damaged and needs to be maintained, the second magnet is inserted into the through hole, at the moment, because the attraction force of the second magnet to the first magnet is greater than the friction force between the movable plate and the second sliding groove and the pulling force of the first spring to the movable plate, the movable plate moves towards the direction close to the through hole, and then a wrench is used; the bolt and the nut can be separated, so that the bolt and the nut can be fastened and can also be separated, the practicability of the bolt and the nut is effectively improved, and meanwhile, the risk that the bolt and the nut cannot be taken down and need to be cut off, parts fastened by the bolt and the nut are possibly damaged, and resource waste is caused.
Preferably, the through hole is connected with a rubber block in a sliding manner;
the during operation, after accomplishing bolt and nut fastening, inside advancing the through-hole with the block rubber stopper, closely laminate with the through-hole inner wall because of block rubber border surface, effectually prevent that external steam from entering into in the second spout, thereby effectively avoid the inside rust of nut, and then effectively avoid the fly leaf after rustting to bond with the bolt, lead to second magnet to fill in behind the through-hole, appeal between first magnet and the second magnet is less than the frictional force between fly leaf and bolt and the second spout, first spring is to the elasticity of fly leaf, thereby lead to the fly leaf to be unable normal through-hole direction motion, and then lead to the fly leaf still to be located between the second spout and make bolt and nut unable to separate, have to relieve the nut and the being connected of bolt through the mode that cuts off the bolt.
Preferably, the upper surface and the lower surface in the second sliding groove are both provided with a third sliding groove; the third sliding groove is inclined towards the direction of the through hole; the third sliding groove is positioned between the surface of the movable plate on one side close to the first spring and the surface of the second sliding groove on one side far away from the central axis of the nut; a third magnet is elastically connected to the inside of the third sliding chute through a second spring;
when the bolt and the nut are required to be installed or removed in work, the second magnet specially made by the invention is required, the magnetic field intensity of the second magnet is a preset specific range value, when a lawbreaker inserts the inside of the through hole through a common magnet and the magnetic field intensity of the common magnet exceeds the magnetic field intensity of the second magnet of the invention, the attraction force between the common magnet and the third magnet is larger than the pulling force of the second spring to the third magnet, so that the third magnet slides out of the third chute at one end far away from the second spring, the attraction force between the common magnet and the first magnet is larger than the friction force between the movable plate and the second chute and the elasticity of the first spring to the movable plate, the movable plate moves towards the through hole, the surface of one side of the movable plate close to the through hole contacts the third magnet, the third magnet blocks the movable plate from continuing to move towards the through hole, and the surface of one side of the movable plate far away from the through hole is still positioned in the second chute, the movable plate still limits the bolt, so that the situation that a lawbreaker uses a magnet with larger magnetic field intensity to place on the outer surface of the nut to separate the bolt from the nut is effectively avoided, and the anti-theft performance of the anti-theft nut is further effectively improved; when a lawbreaker inserts into the through hole through the common magnet and the magnetic field intensity of the common magnet is less than that of the second magnet, the attraction force between the common magnet and the first magnet is less than the friction force between the movable plate and the second chute and the elasticity of the first spring to the movable plate, so that the movable plate does not move, and the safety performance of the invention for protecting parts is improved.
Preferably, the movable plate comprises a push plate and a mounting plate; the push plate is positioned on one side close to the central axis of the nut; the mounting plate is positioned at one side close to the through hole; the surface of the push plate, which is close to one side of the through hole, is elastically connected with the mounting plate through a plurality of third springs which are uniformly and fixedly connected; the surface of the mounting plate, which is close to one side of the through hole, is elastically connected with the surface of the second chute, which is close to one side of the through hole, through a first spring;
when the anti-theft device works, when a lawbreaker inserts into the through hole through the common magnet, the magnetic field intensity of the common magnet exceeds the magnetic field intensity of the second magnet, and the magnetic field intensity of the common magnet is too large, so that the end of the third magnet far away from the second spring does not extend out of the third chute, and the first magnet drives the mounting plate to move towards the through hole, when the end of the third magnet far away from the second spring is positioned between the push plate and the mounting plate, the end of the third magnet far away from the second spring extends out of the third chute, so that the mounting plate continues to drive the push plate to move through the third spring, the surface of one side of the push plate close to the through hole contacts with the third magnet, thereby realizing the limit of the push plate, and after the push plate stops moving, the surface of the push plate far away from the through hole is still positioned in the second chute, thereby realizing the limit of the bolt, and effectively improving the anti-theft performance of the anti-theft device, the fastening performance between the bolt and the nut is effectively improved.
Preferably, the push plate and the mounting plate are hermetically connected through paraffin; lubricating oil is filled in a sealed space formed by the paraffin;
the during operation, bolt and nut fastening back because of the paraffin texture is softer for paraffin receives the extrusion when the motion at push pedal and mounting panel, appears the gap on the paraffin, makes inside lubricating oil slowly flow out, thereby makes lubricating oil carry out the surface oil to the gap between bolt and the screw rod and handles, avoids the bolt nut to expose and easily rusts in the open air, when needs are with the bolt nut separation, can be smooth with bolt and nut separation, effectively improve device's practicality.
Preferably, the push plate and the mounting plate are both provided with oil collecting grooves; the oil collecting groove surrounds the side wall of the push plate, which is contacted with the second sliding groove; the oil collecting groove surrounds the side wall of the mounting plate, which is in contact with the second sliding groove;
the during operation, after lubricating oil flows, at first through a plurality of oil sumps of seting up on push pedal and the mounting panel, then lubricating oil just slowly flows in to bolt and nut contact department through the gap between push pedal and the second spout inner wall slowly, and the oil sump can be collected lubricating oil, and it is great to avoid appearing the gap on the paraffin, so that lubricating oil once only flows out to the realization lasts to lubricate bolt and nut through lubricating oil, improves the life of this device.
The invention has the following beneficial effects:
1. according to the anti-theft fastening bolt and the nut thereof, the bolt and the nut can be installed by arranging the movable plate, the first spring, the first magnet and the second magnet, the movable plate is positioned in the first sliding groove after installation is completed, the surface of one side of the movable plate, which is far away from the first through hole, is in contact with the surface of the bolt, and the bolt is effectively limited, so that the bolt and the nut do not rotate, and the anti-theft performance of the anti-theft fastening bolt is effectively improved.
2. According to the anti-theft fastening bolt and the nut thereof, the second spring and the third magnet are arranged, so that when a lawbreaker inserts into the through hole through the common magnet and the magnetism of the common magnet exceeds the magnetic force of the second magnet, the third magnet extends out of the third chute, and the third magnet blocks the movable plate to move towards the through hole, so that the movable plate is still positioned in the first chute on the surface of one side far away from the first through hole, and the bolt is still limited, thereby effectively ensuring that the bolt and the nut are not separated, and effectively improving the safety performance of the device.
3. According to the anti-theft fastening bolt and the nut thereof, when a lawbreaker inserts into the through hole through the common magnet and the magnetism of the common magnet exceeds the magnetism of the second magnet, and when the magnetism of the common magnet is too large, the third magnet does not extend out of the third chute at one end far away from the second spring, and the first magnet drives the mounting plate to move towards the through hole, when the surface of the side, close to the through hole, of the push plate contacts the third magnet, and after the push plate stops moving, the surface of the side, far away from the through hole, of the push plate is still positioned in the second chute, so that the push plate is limited, the anti-theft performance of the anti-theft fastening bolt and the nut are effectively improved, and the fastening performance of the bolt and the nut is effectively improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a front view of the present invention, cut away;
FIG. 2 is a schematic view of a second magnet and rubber block;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
in the figure: the device comprises a bolt 1, a nut 2, threads 3, a first sliding groove 4, a second sliding groove 5, a first spring 6, a movable plate 7, a first magnet 8, a circular groove 9, a through hole 11, a second magnet 12, a rubber block 13, a third sliding groove 15, a second spring 16, a third magnet 17, a push plate 18, a mounting plate 19, a third spring 21, paraffin 22 and an oil collecting groove 23.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 3, the anti-theft fastening bolt and the nut thereof according to the present invention includes a bolt 1 and a nut 2; the outer surface of the circumference of the bolt 1 is uniformly provided with threads 3; a plurality of first sliding grooves 4 are uniformly formed in the outer surface of the circumference of the bolt 1; the first sliding groove 4 penetrates through the screw teeth 3; the bolt 1 is connected with the nut 2 through threads; a plurality of second sliding grooves 5 are uniformly formed in the surface of one side, close to the central axis of the nut 2, of the nut 2; the surface of one side of the second chute 5 close to the outer part of the nut 2 is elastically connected with a movable plate 7 through a first spring 6; the movable plate 7 is fixedly connected with a first magnet 8 at one side close to the outer surface of the nut 2; the outer surface of the nut 2 is provided with a circular groove 9; a through hole 11 is formed in the circular groove 9; the through hole 11 is communicated with the second chute 5, and the through hole 11 is opposite to the first magnet 8; a second magnet 12 is slidably connected in the through hole 11.
When the bolt works, the bolt 1 and the nut 2 are not in threaded connection in an initial state; because the elastic force of the first spring 6 is greater than the friction force between the movable plate 7 and the second chute 5, the first spring 6 pushes the movable plate 7 to move towards the direction close to the central axis of the nut 2, and at the moment, the surface of the movable plate 7 on the side far away from the through hole 11 exceeds the surface of the inner ring of the nut 2;
when a part needs to be fastened with the nut 2 through the bolt 1, the second magnet 12 is installed and placed in the through hole 11, because the attraction force of the second magnet 12 to the first magnet 8 is greater than the friction force between the movable plate 7 and the second chute 5 and the elastic force of the first spring 6 to the movable plate 7, at this time, the movable plate 7 moves towards the direction close to the through hole 11, when the movable plate 7 stops moving, the movable plate 7 completely enters the second chute 5 at the side surface close to the central axis of the nut 2, at this time, the operation is also performed on the outer surfaces of the nut 2 at other positions, then, the bolt 1 can be screwed into the nut 2 through the wrench, and in this process, the part of the second magnet 12 far from the through hole 11 completely enters the circular groove 9, so that the side surface of the second magnet 12 far from the central axis of the nut 2 is parallel to the outer surface of the corresponding nut 2, and the first magnet 8 and the second magnet 12 attract each other, therefore, when the nut 2 is screwed by a wrench, the first magnet 8 cannot fall from the inside of the through hole 11, and the wrench does not damage the second magnet 12 when working, so that the service life of the parts of the invention is effectively ensured, and the through hole 11 is designed to be rectangular, so that the possibility that lawless persons directly attract the first magnet 8 through the magnets of common types can be effectively reduced, and then the bolt 1 is separated from the nut 2, so that the parts are lost (the through hole 11 is in other shapes and is also within the protection range of the invention); after the parts are fastened, the plurality of second magnets 12 are taken down, at the moment, because the elastic force of the first spring 6 is greater than the friction force between the movable plate 7 and the second sliding groove 5, the movable plate 7 enters the first sliding groove 4, the movable plate 7 is attached to the outer surface of the bolt 1 on the surface close to one side of the central axis of the nut 2, part of the movable plate 7 is inserted into the first sliding groove 4, the other part of the movable plate 7 is still located in the second sliding groove 5, and therefore the screw threads 3 are limited and clamped through the movable plate 7, the bolt 1 cannot be unscrewed from the nut 2, and the property stealing of the unscrewed bolt 1 by lawless persons is effectively prevented; when the parts are fastened and the first sliding groove 4 does not correspond to the movable plate 7, the bolt 1 is unscrewed after the second magnet 12 is inserted into the through hole 11, and a rubber gasket is added between the bolt 1 and the nut 2 until the first sliding groove 4 corresponds to the movable plate 7; when the parts are damaged and need to be maintained, the second magnet 12 is inserted into the through hole 11, at this time, because the attraction force of the second magnet 12 to the first magnet 8 is greater than the friction force between the movable plate 7 and the second chute 5 and the pulling force of the first spring 6 to the movable plate 7, the movable plate 7 moves towards the direction close to the through hole 11, and then a wrench is used; the bolt 1 and the nut 2 can be separated, so that the bolt 1 and the nut 2 can be fastened, the bolt 1 and the nut 2 can also be separated, the practicability of the bolt is effectively improved, meanwhile, the bolt 1 cannot be taken down from the nut 2 and needs to be cut off, and the risk of damaging parts fastened by the bolt 1 and the nut 2 possibly exists, and resource waste is caused.
As an embodiment of the present invention, a rubber block 13 is slidably connected inside the through hole 11;
during operation, after bolt 1 and nut 2 fastening are accomplished, inside rubber piece 13 stopper through-hole 11, because of rubber piece 13 border surface and the inseparable laminating of through-hole 11 inner wall, effectually prevent that external steam from entering into in the second spout 5, thereby effectively avoid 2 inside rusts of nut, and then effectively avoid the fly leaf 7 after rustting to bond with bolt 1, lead to second magnet 12 to fill in behind the through-hole 11, the appeal between first magnet 8 and the second magnet 12 is less than the frictional force between fly leaf 7 and bolt 1 and the second spout 5, the elasticity of first spring 6 to fly leaf 7, thereby lead to fly leaf 7 unable to the motion of through-hole 11 direction, and then lead to fly leaf 7 still to be located between the second spout 5 and make bolt 1 and nut 2 unable separation, have to remove nut 2 and bolt 1's connection through the mode of cutting off bolt 1.
As an embodiment of the present invention, the second sliding chute 5 has third sliding chutes 15 formed on both the upper surface and the lower surface; the third sliding chute 15 is designed to be inclined towards the direction of the through hole 11; the third sliding groove 15 is located between a side surface of the movable plate 7 close to the first spring 6 and a side surface of the second sliding groove 5 far away from the central axis of the nut 2; a third magnet 17 is elastically connected to the inside of the third sliding groove 15 through a second spring 16;
when the bolt 1 and the nut 2 are required to be installed or removed, the second magnet 12 specially made according to the present invention is required, the magnetic field strength of the second magnet 12 is within a preset specific range, when a lawless person inserts the through hole 11 through a common magnet and the magnetic field strength of the common magnet exceeds the magnetic field strength of the second magnet 12 of the present invention, the attractive force between the common magnet and the third magnet 17 is greater than the tensile force of the second spring 16 to the third magnet 17, so that the third magnet 17 slides out of the third chute 15 at the end far from the second spring 16, the attractive force between the common magnet and the first magnet 8 is greater than the friction force between the movable plate 7 and the second chute 5 and the elastic force of the first spring 6 to the movable plate 7, the movable plate 7 moves towards the through hole 11, the surface of the movable plate 7 near the through hole 11 contacts the third magnet 17, the third magnet 17 prevents the movable plate 7 from continuing to move towards the through hole 11, at the moment, the surface of the movable plate 7, which is far away from the through hole 11, is still positioned in the second chute 5, and the movable plate 7 still limits the bolt 1, so that the situation that a lawbreaker uses a magnet with larger magnetic field intensity to place on the outer surface of the nut 2 to separate the bolt 1 from the nut 2 is effectively avoided, and the anti-theft performance of the anti-theft device is further effectively improved; when a lawbreaker inserts into the through hole 11 through the common magnet and the magnetic field intensity of the common magnet is less than the magnetic field intensity of the second magnet 12 of the present invention, the attraction force between the common magnet and the first magnet 8 is less than the friction force between the movable plate 7 and the second chute 5 and the elastic force of the first spring 6 to the movable plate 7, so that the movable plate 7 does not move, and the safety performance of the present invention to the protection of parts is further improved.
As an embodiment of the present invention, the movable plate 7 includes a push plate 18 and a mounting plate 19; the push plate 18 is positioned on one side close to the central axis of the nut 2; the mounting plate 19 is positioned at one side close to the through hole 11; the push plate 18 is elastically connected with a mounting plate 19 on the surface of one side close to the through hole 11 through a plurality of third springs 21 which are uniformly and fixedly connected; the surface of the mounting plate 19, which is close to one side of the through hole 11, is elastically connected with the surface of the second chute 5, which is close to one side of the through hole 11, through a first spring 6;
when the device works, when a lawbreaker is inserted into the through hole 11 through the common magnet and the magnetic field strength of the common magnet exceeds the magnetic field strength of the second magnet 12 of the invention, and when the magnetic field strength of the common magnet is too large, the end of the third magnet 17 far away from the second spring 16 does not extend out of the third chute 15, and the first magnet 8 drives the mounting plate 19 to move towards the through hole 11, at this time, when the end of the third magnet 17 far away from the second spring 16 is located between the push plate 18 and the mounting plate 19, the end of the third magnet 17 far away from the second spring 16 extends out of the third chute 15, so that when the mounting plate 19 continues to drive the push plate 18 to move through the third spring 21, the surface of the push plate 18 close to the through hole 11 contacts with the third magnet 17, thereby realizing the limit of the push plate 18, and after the push plate 18 stops moving, the surface of the push plate 18 far away from the through hole 11 is still located inside the second chute 5, therefore, the bolt 1 is limited, the anti-theft performance of the anti-theft bolt is effectively improved, and the tightness between the bolt 1 and the nut 2 is effectively improved.
In one embodiment of the invention, the push plate 18 and the mounting plate 19 are hermetically connected through paraffin 22; lubricating oil is filled in a sealed space formed by the paraffin 22;
the during operation, bolt 1 and nut 2 fastening back, because of the paraffin 22 texture is softer, make paraffin 22 receive the extrusion when the motion at push pedal 18 and mounting panel 19, appear the gap on paraffin 22, make inside lubricating oil slowly flow, thereby make lubricating oil carry out the surface oil to the gap between bolt 1 and the screw rod and handle, avoid bolt 1 nut 2 to expose and easily rust in the open air, when needs are with bolt 1 nut 2 separation, can be smooth with bolt 1 and nut 2 separation, effectively improve the practicality of device.
As an embodiment of the invention, the push plate 18 and the mounting plate 19 are both provided with oil collecting grooves 23; the oil collecting groove 23 surrounds the side wall of the push plate 18, which is in contact with the second sliding groove 5; the oil collecting groove 23 surrounds the side wall of the mounting plate 19, which is in contact with the second sliding groove 5;
the during operation, after lubricating oil flows out, at first through a plurality of oil sumps 23 that set up on push pedal 18 and the mounting panel 19, then lubricating oil just slowly flows in to bolt 1 and nut 2 contact department through the gap between push pedal 18 and the 5 inner walls of second spout, oil sump 23 can be collected lubricating oil, it is great to avoid appearing the gap on paraffin 22, so that lubricating oil once only flows out, thereby realize continuously lubricating bolt 1 and nut 2 through lubricating oil, improve the life of this device.
The specific implementation flow is as follows:
in the initial state, the bolt 1 and the nut 2 are not in threaded connection; because the elastic force of the first spring 6 is greater than the friction force between the movable plate 7 and the second chute 5, the first spring 6 pushes the movable plate 7 to move towards the direction close to the central axis of the nut 2, and at the moment, the surface of the movable plate 7 on the side far away from the through hole 11 exceeds the surface of the inner ring of the nut 2;
when a part needs to be fastened with the nut 2 through the bolt 1, the second magnet 12 is installed and placed in the through hole 11, because the attraction force of the second magnet 12 to the first magnet 8 is greater than the friction force between the movable plate 7 and the second chute 5 and the elastic force of the first spring 6 to the movable plate 7, at this time, the movable plate 7 moves towards the direction close to the through hole 11, when the movable plate 7 stops moving, the movable plate 7 completely enters the second chute 5 at the side surface close to the central axis of the nut 2, at this time, the operation is also performed on the outer surfaces of the nut 2 at other positions, then, the bolt 1 can be screwed into the nut 2 through the wrench, and in this process, the part of the second magnet 12 far from the through hole 11 completely enters the circular groove 9, so that the side surface of the second magnet 12 far from the central axis of the nut 2 is parallel to the outer surface of the corresponding nut 2, and the first magnet 8 and the second magnet 12 attract each other, therefore, when the nut 2 is screwed by a wrench, the first magnet 8 cannot fall from the inside of the through hole 11, and the wrench does not damage the second magnet 12 when working, so that the service life of the parts of the invention is effectively ensured, and the through hole 11 is designed to be rectangular, so that the possibility that lawless persons directly attract the first magnet 8 through the magnets of common types can be effectively reduced, and then the bolt 1 is separated from the nut 2, so that the parts are lost (the through hole 11 is in other shapes and is also within the protection range of the invention); after the parts are fastened, the plurality of second magnets 12 are taken down, at the moment, because the elastic force of the first spring 6 is greater than the friction force between the movable plate 7 and the second sliding groove 5, the movable plate 7 enters the first sliding groove 4, the movable plate 7 is attached to the outer surface of the bolt 1 on the surface close to one side of the central axis of the nut 2, part of the movable plate 7 is inserted into the first sliding groove 4, the other part of the movable plate 7 is still located in the second sliding groove 5, and therefore the screw threads 3 are limited and clamped through the movable plate 7, the bolt 1 cannot be unscrewed from the nut 2, and the property stealing of the unscrewed bolt 1 by lawless persons is effectively prevented; when the parts are fastened and the first sliding groove 4 does not correspond to the movable plate 7, the bolt 1 is unscrewed after the second magnet 12 is inserted into the through hole 11, and a rubber gasket is added between the bolt 1 and the nut 2 until the first sliding groove 4 corresponds to the movable plate 7; when the parts are damaged and need to be maintained, the second magnet 12 is inserted into the through hole 11, at this time, because the attraction force of the second magnet 12 to the first magnet 8 is greater than the friction force between the movable plate 7 and the second chute 5 and the pulling force of the first spring 6 to the movable plate 7, the movable plate 7 moves towards the direction close to the through hole 11, and then a wrench is used; the bolt 1 and the nut 2 can be separated, so that the bolt 1 and the nut 2 can be fastened, and the bolt 1 and the nut 2 can also be separated, the practicability of the invention is effectively improved, and meanwhile, the risk that parts fastened by the bolt 1 and the nut 2 are damaged and the resource waste is caused because the bolt 1 and the nut 2 cannot be taken down and the bolt 1 needs to be cut off is avoided;
after the bolt 1 and the nut 2 are fastened, the rubber block 13 is inserted into the through hole 11, the circumferential surface of the rubber block 13 is tightly attached to the inner wall of the through hole 11, external water vapor is effectively prevented from entering the second chute 5, rusting in the nut 2 is effectively avoided, and the rusted movable plate 7 is effectively prevented from being bonded with the bolt 1, so that after the second magnet 12 is inserted into the through hole 11, the attraction force between the first magnet 8 and the second magnet 12 is smaller than the friction force between the movable plate 7 and the bolt 1 and the second chute 5, and the elasticity of the first spring 6 on the movable plate 7, so that the movable plate 7 cannot move towards the direction of the through hole 11, the movable plate 7 is still positioned between the second chutes 5, the bolt 1 and the nut 2 cannot be separated, and the connection between the nut 2 and the bolt 1 has to be removed in a mode of cutting off the bolt 1;
when the bolt 1 and the nut 2 need to be installed or removed, the second magnet 12 specially made in the present invention is needed, and the magnetic field strength of the second magnet 12 is a predetermined specific range, when a lawless person inserts into the through hole 11 through a common magnet and the magnetic field strength of the common magnet exceeds the magnetic field strength of the second magnet 12 in the present invention, the attractive force between the common magnet and the third magnet 17 is greater than the pulling force of the second spring 16 to the third magnet 17, so that the third magnet 17 slides out of the third chute 15 at the end far from the second spring 16, so that the attractive force between the common magnet and the first magnet 8 is greater than the friction force between the movable plate 7 and the second chute 5 and the elastic force of the first spring 6 to the movable plate 7, the movable plate 7 moves toward the through hole 11, at this time, the surface of the movable plate 7 near the through hole 11 contacts the third magnet 17, and the third magnet 17 blocks the movable plate 7 from moving toward the through hole 11, at the moment, the surface of the movable plate 7, which is far away from the through hole 11, is still positioned in the second chute 5, and the movable plate 7 still limits the bolt 1, so that the situation that a lawbreaker uses a magnet with larger magnetic field intensity to place on the outer surface of the nut 2 to separate the bolt 1 from the nut 2 is effectively avoided, and the anti-theft performance of the anti-theft device is further effectively improved; when a lawbreaker inserts into the through hole 11 through the common magnet and the magnetic field intensity of the common magnet is less than the magnetic field intensity of the second magnet 12 of the invention, the attraction force between the common magnet and the first magnet 8 is less than the friction force between the movable plate 7 and the second chute 5 and the elastic force of the first spring 6 to the movable plate 7, so that the movable plate 7 does not move, and the safety performance of the invention to the part protection is improved;
when a lawbreaker inserts into the through hole 11 through the common magnet and the magnetic field strength of the common magnet exceeds the magnetic field strength of the second magnet 12 of the present invention, and when the magnetic field strength of the common magnet is too large, the end of the third magnet 17 far from the second spring 16 does not extend out of the third sliding groove 15, and the first magnet 8 drives the mounting plate 19 to move toward the through hole 11, at this time, when the end of the third magnet 17 far from the second spring 16 is located between the push plate 18 and the mounting plate 19, the end of the third magnet 17 far from the second spring 16 extends out of the third sliding groove 15, so that when the mounting plate 19 continues to drive the push plate 18 to move through the third spring 21, the surface of the push plate 18 near the through hole 11 contacts with the third magnet 17, thereby realizing the limit of the push plate 18, and after the push plate 18 stops moving, the surface of the push plate 18 far from the through hole 11 is still located inside the second sliding groove 5, therefore, the bolt 1 is limited, the anti-theft performance of the anti-theft bolt is effectively improved, and the tightness between the bolt 1 and the nut 2 is effectively improved;
after the bolt 1 and the nut 2 are fastened, the paraffin 22 is extruded when the push plate 18 and the mounting plate 19 move due to the fact that the paraffin 22 is soft in texture, a gap appears on the paraffin 22, and internal lubricating oil slowly flows out, so that the lubricating oil can perform surface oil treatment on the gap between the bolt 1 and the screw rod, the bolt 1 and the nut 2 are prevented from being exposed outdoors and easily rusted, when the bolt 1 and the nut 2 need to be separated, the bolt 1 and the nut 2 can be smoothly separated, and the practicability of the device is effectively improved; after lubricating oil flows out, at first through a plurality of oil sumps 23 of seting up on push pedal 18 and the mounting panel 19, then lubricating oil just slowly flows in to bolt 1 and nut 2 contact department through the gap between push pedal 18 and the 5 inner walls of second spout, and oil sump 23 can be collected lubricating oil, avoids appearing the gap great on paraffin 22 to once only flow as for lubricating oil, thereby realizes continuously lubricating bolt 1 and nut 2 through lubricating oil, improves the life of this device.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides an anti-theft type fastening bolt and nut which characterized in that: comprises a bolt (1) and a nut (2); the outer surface of the circumference of the bolt (1) is uniformly provided with screw teeth (3); a plurality of first sliding grooves (4) are uniformly formed in the outer surface of the circumference of the bolt (1); the first sliding groove (4) penetrates through the screw teeth (3); the bolt (1) is connected with the nut (2) through threads; a plurality of second sliding grooves (5) are uniformly formed in the surface of one side, close to the central axis of the nut (2), of the nut (2); the surface of one side, close to the outer part of the nut (2), of the second sliding groove (5) is elastically connected with a movable plate (7) through a first spring (6); one side of the movable plate (7) close to the outer surface of the screw cap (2) is fixedly connected with a first magnet (8); a circular groove (9) is formed in the outer surface of the nut (2); a through hole (11) is formed in the circular groove (9); the through hole (11) is communicated with the second chute (5), and the through hole (11) is opposite to the first magnet (8); and a second magnet (12) is connected in the through hole (11) in a sliding manner.
2. The anti-theft fastening bolt and nut as defined in claim 1, wherein: the rubber block (13) is connected inside the through hole (11) in a sliding mode.
3. The anti-theft fastening bolt and nut as defined in claim 1, wherein: third sliding grooves (15) are formed in the upper surface and the lower surface of the second sliding groove (5); the third sliding chute (15) is obliquely designed towards the direction of the through hole (11); the third sliding groove (15) is positioned between the surface of the movable plate (7) on one side close to the first spring (6) and the surface of the second sliding groove (5) on one side far away from the central axis of the nut (2); and a third magnet (17) is elastically connected inside the third sliding groove (15) through a second spring (16).
4. The anti-theft fastening bolt and nut as defined in claim 4, wherein: the movable plate (7) comprises a push plate (18) and a mounting plate (19); the push plate (18) is positioned on one side close to the central axis of the nut (2); the mounting plate (19) is positioned at one side close to the through hole (11); the surface of the push plate (18) close to one side of the through hole (11) is elastically connected with a mounting plate (19) through a plurality of third springs (21) which are uniformly and fixedly connected; the mounting plate (19) is close to one side surface of the through hole (11) and is elastically connected with the second sliding groove (5) through the first spring (6) so as to be close to one side surface of the through hole (11).
5. The anti-theft fastening bolt and nut as defined in claim 1, wherein: the push plate (18) is connected with the mounting plate (19) in a sealing way through paraffin (22); and lubricating oil is filled in a sealed space formed by the paraffin (22).
6. The anti-theft fastening bolt and nut as defined in claim 5, wherein: the push plate (18) and the mounting plate (19) are both provided with oil collecting grooves (23); the oil collecting groove (23) surrounds the side wall of the push plate (18) which is contacted with the second sliding groove (5); the oil collecting groove (23) surrounds the side wall of the mounting plate (19) which is in contact with the second sliding groove (5).
CN202110794639.1A 2021-07-14 2021-07-14 Anti-theft type fastener Active CN113446298B (en)

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CN202110794639.1A CN113446298B (en) 2021-07-14 2021-07-14 Anti-theft type fastener

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Application Number Priority Date Filing Date Title
CN202110794639.1A CN113446298B (en) 2021-07-14 2021-07-14 Anti-theft type fastener

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CN113446298B CN113446298B (en) 2023-01-03

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018119653A (en) * 2017-01-27 2018-08-02 久一 西室 New fastening structure for bolt and nut
CN211314816U (en) * 2019-11-21 2020-08-21 天津德泽金属制品有限公司 Replaceable anti-theft nut
CN211778615U (en) * 2020-03-17 2020-10-27 天津瑞鑫盛世科技有限公司 Three round pin axles with autonomic lubricating function
CN211924703U (en) * 2020-04-13 2020-11-13 苏州达舟精密机械有限公司 Nut capable of preventing loosening
CN212775123U (en) * 2020-08-24 2021-03-23 深圳市昌海科明家电有限公司 High fastener of security
CN213298539U (en) * 2020-10-12 2021-05-28 福建省华盖机械制造有限公司 Bolt suite

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018119653A (en) * 2017-01-27 2018-08-02 久一 西室 New fastening structure for bolt and nut
CN211314816U (en) * 2019-11-21 2020-08-21 天津德泽金属制品有限公司 Replaceable anti-theft nut
CN211778615U (en) * 2020-03-17 2020-10-27 天津瑞鑫盛世科技有限公司 Three round pin axles with autonomic lubricating function
CN211924703U (en) * 2020-04-13 2020-11-13 苏州达舟精密机械有限公司 Nut capable of preventing loosening
CN212775123U (en) * 2020-08-24 2021-03-23 深圳市昌海科明家电有限公司 High fastener of security
CN213298539U (en) * 2020-10-12 2021-05-28 福建省华盖机械制造有限公司 Bolt suite

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