CN116771783A - Locking fastening component that takes off - Google Patents

Locking fastening component that takes off Download PDF

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Publication number
CN116771783A
CN116771783A CN202310681269.XA CN202310681269A CN116771783A CN 116771783 A CN116771783 A CN 116771783A CN 202310681269 A CN202310681269 A CN 202310681269A CN 116771783 A CN116771783 A CN 116771783A
Authority
CN
China
Prior art keywords
block
groove
driving
dustproof
telescopic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310681269.XA
Other languages
Chinese (zh)
Inventor
蒋小明
沈磊
孙健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangxi Haiwei Intelligent Equipment Co ltd
Original Assignee
Jiangxi Haiwei Intelligent Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangxi Haiwei Intelligent Equipment Co ltd filed Critical Jiangxi Haiwei Intelligent Equipment Co ltd
Priority to CN202310681269.XA priority Critical patent/CN116771783A/en
Publication of CN116771783A publication Critical patent/CN116771783A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16B35/06—Specially-shaped heads
    • 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
    • F16B33/00—Features common to bolt and nut
    • F16B33/004—Sealing; Insulation
    • 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
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • 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
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/284—Locking by means of elastic deformation

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The invention relates to the field of fasteners and discloses an anti-loosening fastening assembly, which comprises a bolt and a nut, wherein the bolt comprises a head part and a screw rod, the head part is provided with a dustproof driving part, the dustproof driving part comprises a driving groove with a non-circular cross section arranged on the head part and a dustproof block which is elastically telescopic and can block the driving groove and flush with the end surface of the head part or expose the driving groove, a containing groove is arranged in the screw rod, the side wall of the screw rod is axially recessed with a matching groove communicated with the containing groove, a telescopic part which is in splicing fit with the matching groove is elastically telescopic arranged in the containing groove, one end of the telescopic part far away from the containing groove is elastically telescopic and provided with a plurality of limiting blocks along the axial direction of the screw rod at intervals, a linkage mechanism which can realize synchronous telescopic part telescopic expansion and resetting along with the telescopic part stretching of the dustproof block is arranged between the telescopic part and the dustproof block, and the fastening assembly has the functions of dust prevention and loosening, and convenient disassembly and operation.

Description

Locking fastening component that takes off
Technical Field
The invention relates to the field of fasteners, in particular to an anti-loosening fastening assembly.
Background
The bolt and the nut are common fastening components, are generally stable after being locked, but if a fastened workpiece is in vibration for a long time, the vibration frequency difference exists between the connecting pieces, so that certain displacement can occur to each connecting piece in the connecting structure, the nut and the bolt are loosened, for example, when a train passes through a track at a certain speed, the fastening bolt and the nut on the track vibrate, the fastening bolt and the nut are loosened, and maintenance personnel are required to maintain and overhaul at regular time.
The chinese patent with publication number CN112879415a discloses a latch type locking fastening assembly, which comprises a screw rod, a nut and a latch seat, wherein the screw rod is provided with an external thread and a tooth slot, the inner annular wall of the nut is provided with an internal thread and a latch seat groove, the latch seat is arranged at a non-edge position of the inner annular wall, the latch seat is formed by a latch and a latch sheet, the latch is fixedly mounted or directly generated on the latch sheet to form the latch seat, the latch sheet is connected with the bottom of the latch seat groove through an elastic material, when the nut is screwed into the screw rod, the latch seat can move towards the inside of the latch seat groove after being extruded due to the action of the elastic material and the front inclined side of the top end position of the latch, so that the latch is separated from the tooth slot, and the nut is screwed into smoothly.
In the above patent, the nut can only be screwed down unidirectionally and cannot be unscrewed, and although the effect of preventing loosening can be realized, if the fastening component needs to be replaced for a longer period of time or the fastening object needs to be detached, the fastening component needs to be broken violently to loosen so as to drive the fastening component to loosen, and the problem of inconvenience in detachment exists.
Disclosure of Invention
Aiming at the defect that the loose-proof fastening component cannot be loosened after being fastened in the prior art, the invention provides the loose-proof fastening component which can realize the loose prevention and can be quickly disassembled.
In order to solve the technical problems, the invention is solved by the following technical scheme:
the utility model provides a locking fastening component that takes off, includes bolt and nut, and the bolt includes head and screw rod, its characterized in that: the head is provided with a dustproof driving part, the dustproof driving part comprises a driving groove with a non-circular section arranged on the head and a dustproof block which is elastically telescopic and can block the driving groove and flush with the end face of the head or expose the driving groove, a containing groove is arranged in the screw, a matching groove communicated with the containing groove is recessed along the axial direction of the screw, a telescopic part which is in plug-in fit with the matching groove is elastically telescopic arranged in the containing groove, a plurality of limiting blocks are elastically telescopic arranged at one end of the telescopic part far away from the containing groove along the axial direction of the screw at intervals, and a linkage mechanism is arranged between the telescopic part and the dustproof block;
when the dustproof block contracts towards the inside of the driving groove, the linkage mechanism drives the telescopic part to contract, and the limiting block moves along with the telescopic part until the nut can reciprocate in the axial direction of the screw rod; when the dustproof block is reset to be level with the end face of the head, the telescopic part is reset, the telescopic part stretches out towards the direction of the matching groove, the limiting block moves along with the telescopic part, the limiting block located at two ends of the nut limits the axial reciprocating movement of the nut on the screw rod, and the limiting block opposite to the inner wall of the nut elastically abuts against the inner wall of the nut.
By adopting the scheme, in the fastening assembly of the scheme, the head of the bolt is provided with the dustproof driving part, when in a normal state, the dustproof block is flush with the end part of the head, dirt can be prevented from entering the driving groove, the dustproof effect is achieved, when in a normal state, the telescopic part is in an extending state, as the end part of the telescopic part is provided with the plurality of limiting blocks, if the nut is positioned at a certain position of the screw rod, the limiting blocks at two ends of the nut can limit the axial movement of the nut along the screw rod, the right limiting blocks of the inner wall of the nut are elastically abutted against the inner wall of the nut, the friction force born by the rotation of the nut is increased, the probability of the rotation of the nut is reduced, the nut is multiply limited, the risk of the nut separating is obviously reduced, when the dustproof block is screwed down or unscrewed, the shrinkage of the dustproof block can drive the linkage mechanism, and then the telescopic part is driven to shrink, the limiting blocks can move to the nut smoothly reciprocate on the screw rod, so that the workpiece is locked or unlocked, the fastening assembly has the functions of dust prevention and the release prevention, and the release prevention function can be automatically switched to the unlocking mode by the release type by the release tool when the special tool rotates.
Preferably, the linkage mechanism comprises a matching block convexly arranged on one side of the telescopic part, which is far away from the matching groove, a driving chute arranged on the matching block along the axial direction of the screw rod, and a driving rod convexly arranged on one end of the dustproof block, which is close to the head part, which is matched with the driving chute, along with the approach of the driving rod to the tail part of the screw rod, the driving rod props against the driving chute and drives the matching block to move towards one side far away from the matching groove, and a first elastic piece for driving the telescopic part to be in an extending state is arranged between the matching block and one side of the accommodating groove far away from the matching groove.
By adopting the scheme, in a normal state, the telescopic part is in an extending state under the elastic action of the first elastic piece, so that the limiting block on the telescopic part can limit the movement of the nut; when the dustproof block is pressed, the driving rod fixed with the dustproof block slides along the inclined plane of the driving chute, and because the dustproof block moves along the axial direction of the screw rod, the dustproof block is driven to overcome the elasticity of the first elastic piece and move along the direction perpendicular to the driving rod, and then the telescopic part is driven to realize shrinkage until the limiting block and the telescopic block are retracted into the matching groove together, so that the nut can reciprocate on the screw rod.
Preferably, the cross section of the driving groove is right trapezoid, one end close to the head is a big head end, the inclined plane of the driving groove is located on one side far away from the telescopic part, and when the dustproof block is level with the end face of the head, the driving rod is located on the ascending slope of the inclined plane.
By adopting the scheme, the driving groove is arranged into a right trapezoid, the big end of the driving groove faces the head position, the inclined plane of the driving groove is positioned on one side away from the telescopic part, and when the dustproof block is contracted, the driving rod moves along the contraction direction to drive the matching block to move towards the direction away from the matching groove, and the telescopic part performs contraction movement.
Preferably, a plurality of first grooves are formed in one side, far away from the matching block, of the telescopic part along the axial direction of the screw at intervals, a limiting block is arranged in each first groove in a telescopic mode, and second elastic pieces with two ends fixed with the limiting block and the bottom of each first groove are arranged between the limiting block and the bottom of each first groove.
By adopting the scheme, the limiting blocks are arranged in a plurality, each limiting block is controlled to stretch and retract independently by the second elastic piece, and the limiting block has the advantages that when the positions of the nuts on the screw rods are different, the limiting blocks can limit the axial reciprocating displacement of the nuts along the screw rods and can elastically abut against the inner wall of the nuts to increase the rotating resistance of the nuts when the limiting blocks are right against the inner wall of the nuts, so that the function of deflection of the multiple limiting nuts is realized, and the loosening probability of the nuts is remarkably reduced.
Preferably, a limiting mechanism for limiting the telescopic part to be separated from the screw rod when the dustproof block is flush with the end face of the head is arranged between the driving rod and the telescopic part, the limiting mechanism comprises a yielding block convexly arranged at one end of the telescopic part close to the head, and the yielding block is provided with a yielding groove which can be used for the driving rod to pass through and can be used for the driving rod to pass through along with the telescopic of the telescopic part.
By adopting the scheme, the setting of the limiting mechanism is that after the dustproof block is assembled with the head, the driving rod fixed with the dustproof block passes through the abdication groove and then corresponds to the driving chute of the matching block, so that the telescopic part can not completely deviate from the accommodating groove due to the grafting matching of the abdication block and the driving rod, and the limiting function is achieved.
Preferably, the matching block is located in the middle of the telescopic part, the first elastic pieces are symmetrically arranged on two sides of the matching block, and the bottom of the driving rod is sunken with a yielding groove for the first elastic pieces to pass through.
By adopting the scheme, the first elastic pieces are symmetrically arranged on two sides of the matching block, so that the stability of expansion and contraction of the expansion part can be improved.
Preferably, the bottom of the driving rod is provided as a pressing ramp cooperating with the ramp of the driving chute.
By adopting the scheme, the bottom of the driving rod is provided with the extrusion inclined plane, and the extrusion inclined plane is matched with the inclined plane of the driving chute in an extrusion manner, so that the moving stability of the dustproof block can be improved.
Preferably, the driving groove is internally provided with a third elastic piece for driving the dustproof block to be in an extending state, and a matching structure which is convenient for the dustproof block to be led into the driving groove and is used for limiting the maximum extending stroke of the dustproof block after being led into the driving groove is arranged between the dustproof block and the driving groove and is flush with the end face of the head.
By adopting the scheme, the dustproof block is in the maximum extension stroke in a normal state by utilizing the matching structure and the third elastic piece, and the maximum extension stroke is flush with the end face of the head, so that the dustproof block is prevented from being separated from the head.
Preferably, the matching structure comprises an introduction block which is elastically and telescopically arranged at two opposite sides of the dustproof block, a fourth elastic piece which drives the introduction block to be in an extending state, and a guide groove which is recessed in the inner wall of the driving groove along the axial direction of the screw rod and can be used for the insertion and guiding sliding of the introduction block, wherein one side of the introduction block, which is close to the screw rod, is arranged to be convenient for introducing an introduction inclined plane of the driving groove.
By adopting the scheme, the guide-in block elastically stretches and contracts on the side wall of the dustproof block, and when the dustproof block is installed, the guide-in block is guided into the driving groove by the guide-in inclined plane and is kept in a splicing guide matched state with the guide groove by the second elastic piece, so that the dustproof block is limited to be separated from the driving groove.
Preferably, the cross section of the dust-proof block is regular polygon or ellipse.
The invention has the remarkable technical effects due to the adoption of the technical scheme: in the anti-loosening fastening assembly, the head part of the bolt is provided with a dustproof driving part, and in a normal state, the dustproof block is flush with the end part of the head part, so that dirt can be prevented from entering the driving groove, and the dustproof effect is achieved; simultaneously, the telescopic part is in the state of stretching out, because telescopic part tip sets up a plurality of stoppers, if the nut is located a position of screw rod this moment, then the stopper at nut both ends can limiting nut along the axial displacement of screw rod, the just limiting stopper of nut inner wall then elasticity butt is at the nut inner wall, increase the frictional force that the nut rotated and receive, reduce nut pivoted probability, therefore, the nut is by multiple spacing, show the risk that reduces the nut and break away from, when pressing the dustproof piece and screw up or unscrew the nut, the shrink of dustproof piece can drive the link gear, and then drive telescopic part shrink, make the stopper synchronous movement to nut can smooth reciprocating motion on the screw rod, realize locking or unblock to the work piece, therefore, this fastening assembly possesses dustproof and anti-loosening's function, and when utilizing specialized tool to rotate, can be automatically by the switching to the unblock mode of locking drawing of patterns, the structure is ingenious, the simple operation.
Drawings
FIG. 1 is an isometric view of a tamper-evident fastening assembly of the present embodiment;
FIG. 2 is a front view of a tamper-evident fastening assembly of the present embodiment;
FIG. 3 is a cross-sectional view of A-A of FIG. 2;
fig. 4 is an enlarged view of a of fig. 3;
fig. 5 is an enlarged view of B of fig. 3;
fig. 6 is a split view of a tamper-evident fastening assembly of the present embodiment.
The names of the parts indicated by the numerical reference numerals in the above drawings are as follows: 1. a head; 101. a driving groove; 102. a guide groove; 2. a screw; 201. a receiving groove; 3. a nut; 4. a dust-proof block; 401. a second groove; 5. a mating groove; 6. a telescopic part; 601. a first groove; 7. a limiting block; 8. a driving rod; 9. a relief groove; 10. extruding the inclined plane; 11. a mating block; 12. driving the chute; 13. letting the bit block; 14. a relief groove; 15. a first elastic member; 16. a third elastic member; 17. an import block; 18. an introduction slope; 19. a fourth elastic member; 20. and a second elastic member.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
1-6, including bolt and nut 3, the bolt includes head 1 and screw rod 2, head 1 is provided with dustproof drive portion, dustproof drive portion includes in the head 1 keep away from the drive groove 101 that the cross-section that screw rod 2 set up is non-circular and elastic extension set up can block drive groove 101 and flush or expose the dustproof piece 4 of drive groove 101 with head 1 terminal surface, the cross-section of drive groove 101 is regular polygon or oval, the embodiment adopts is regular hexagon, for the installation of being convenient for, be provided with in the drive groove 101 and order to drive dustproof piece 4 and be in the third elastic component 16 of stretching out the state, third elastic component 16 is a spring, be provided with the cooperation structure that is convenient for dustproof piece 4 leading-in drive groove 101 and the biggest stretch out stroke of spacing dustproof piece 4 after leading-in is flush with head 1 terminal surface between dustproof piece 4 and drive groove 101.
Referring to fig. 3-4 specifically, the matching structure includes a second groove 401 recessed on two opposite sides of the dust-proof block 4, an introduction block 17 elastically extending and retracting in the second groove 401, and a fourth elastic member 19 with two ends fixed to the introduction block 17 and the bottom of the second groove 401 respectively, the fourth elastic member 19 is a spring, a guide groove 102 for inserting and guiding and sliding the introduction block 17 is recessed on the inner wall of the driving groove 101 along the axial direction of the screw 2, one side of the introduction block 17 close to the screw 2 is set to be convenient for introducing an introduction inclined plane 18 of the driving groove 101, the dust-proof block 4 can be quickly installed by the matching structure, the effect that the dust-proof block 4 is flush with the end surface of the head 1 is realized by using the fourth elastic member 19, and cleaning of the surface of the head 1 is facilitated while dust falling in the driving groove 101 is avoided.
As shown in fig. 3, 5 and 6, a containing groove 201 is formed in the screw 2 along the axial direction of the screw 2, a matching groove 5 communicated with the containing groove 201 is recessed in the side wall of the screw 2 along the axial direction of the screw 2, a telescopic part 6 which is in plug-in fit with the matching groove 5 is elastically telescopic in the containing groove 201, a plurality of first grooves 601 are formed at one end of the telescopic part 6 far away from the containing groove 201 along the axial direction of the screw 2 at intervals, a limiting block 7 is elastically telescopic in the first grooves 601, a second elastic piece 20 with two ends fixed with the limiting block 7 and the bottom of the first grooves 601 is arranged between the limiting block 7 and the bottom of the first grooves 601, the second elastic piece 20 is a spring, a linkage mechanism is arranged between the telescopic part 6 and the dustproof block 4, and when the dustproof block is contracted towards the inside of the driving groove 101, the linkage mechanism drives the telescopic part 6 to shrink, the limiting block 7 moves along with the telescopic part 6 until the nut 3 can reciprocate in the axial direction of the screw 2; when the dustproof block 4 is reset to be level with the end face of the head 1, the telescopic part 6 is synchronously and elastically reset, the telescopic part 6 stretches out towards the direction of the matching groove 5, the limiting block 7 moves along with the telescopic part 6, and the limiting block 7 positioned at two ends of the nut 3 limits the axial reciprocating movement of the nut 3 on the screw rod 2, and the limiting block 7 opposite to the inner wall of the nut 3 is elastically abutted against the inner wall of the nut 3.
The linkage mechanism is shown with specific reference to fig. 3, including the cooperation piece 11 that one side protruding of cooperation groove 5 was kept away from to the telescopic part 6, the drive chute 12 that sets up along the axial of screw rod 2 on the cooperation piece 11, and be provided with the actuating lever 8 that drives chute 12 complex in the one end that dustproof piece 4 is close to head 1 fixed, the cross-sectional shape of actuating groove 101 is right trapezoid and be close to the one end of head 1 for big head end, the inclined plane of actuating groove 101 is located the one side of keeping away from telescopic part 6, the bottom of actuating lever 8 sets up the extrusion inclined plane 10 of the inclined plane complex with drive chute 12, when dustproof piece 4 and head 1 terminal surface level, actuating lever 8 is located the ascending department of inclined plane, along with actuating lever 8 is close to screw rod 2 afterbody, actuating lever 8 supports and drives the actuating chute 12 and to be moved to the one side of keeping away from cooperation groove 5, be provided with the first elastic component 15 that drives telescopic part 6 and be in the state between one side of keeping away from cooperation groove 5 in cooperation piece 11 and holding groove 201, the one end and the cooperation piece 11 is the spring, the other end and holding groove 11 are fixed connection, the other end and holding groove 201 elastic component are the elastic component is located the elastic component 15 that makes progress, the middle part of the telescopic component 11 is located the elastic component 15 is located the first elastic component 15 of the telescopic component 15 that can be located the telescopic part of the telescopic part 8, the telescopic part is located the telescopic part 15 and can be arranged in the side of the telescopic part 15.
Be provided with between actuating lever 8 and telescopic portion 6 and limit telescopic portion 6 to break away from the stop gear of screw rod 2 when dustproof piece 4 flushes with head 1 terminal surface, refer to the fig. 3 and 6 and show, stop gear includes the piece 13 of stepping down that is established in the one end of telescopic portion 6 near head 1 protruding, let be provided with on the piece 13 of stepping down that can supply actuating lever 8 to pass and can supply actuating lever 8 to pass all the time along with the flexible of telescopic portion 6, because dustproof piece 4 and head 1 assembly back, actuating lever 8 pass behind the groove 149 of stepping down and correspond with the drive chute 12 of cooperation piece 11, telescopic portion 6 can't deviate from accommodation groove 201 completely owing to let the grafting cooperation of piece 13 and actuating lever 8, the function that spacing telescopic portion 6 deviate from screw rod 2 has been played.
The assembly process comprises the following steps:
1. fitting assembly: the limiting block 7, the second elastic piece 20, the telescopic part 6, the abdication block 13, the matching block 11 and the first elastic piece 15 are welded and assembled to form a fitting I; the dustproof block 4, the driving rod 8, the guide-in block 17 and the fourth elastic piece 19 are welded and assembled to form a fitting II; the bolt is a fitting III; the nut 3 is a fitting IV; the third elastic member 16 is a fitting five.
2. And (3) assembling: the telescopic block is inserted into the matching groove 5 of the screw 2, then the third elastic piece 16 is placed into the driving groove 101, further, the guiding block 17 on the dustproof block 4 is aligned with the guiding groove 102, the driving rod 8 passes through the yielding groove 149, and the dustproof block 4 is pressed until the guiding block 17 is inserted into the guiding groove 102.
Dustproof principle: in the normal state, the dustproof block 4 is flush with the end part of the head part 1, so that dirt can be prevented from entering the driving groove 101, and the dustproof effect is achieved.
Principle of loose prevention: in normal state, the telescopic part 6 is in a stretched state under the action of the first elastic piece 15, and because the end part of the telescopic part 6 is provided with a plurality of limiting blocks 7, if the nut 3 is located at a certain position of the screw rod 2 at this time, the limiting blocks 7 at two ends of the nut 3 can limit the axial movement of the nut 3 along the screw rod 2, the limiting blocks 7 directly opposite to the inner wall of the nut 3 are elastically abutted against the inner wall of the nut 3, the friction force born by the rotation of the nut 3 is increased, the probability of the rotation of the nut 3 is reduced, so that the nut 3 is multiply limited, and the risk of the separation of the nut 3 is obviously reduced.
Principle of easy disassembly and assembly: when the dustproof block 4 is pressed so that a tool is inserted to screw or unscrew the nut 3, the contraction of the dustproof block 4 can drive the linkage mechanism to further drive the telescopic part 6 to contract, so that the limiting block 7 synchronously contracts until the nut 3 can smoothly reciprocate on the screw rod 2, and locking or unlocking of a workpiece is realized.

Claims (10)

1. The utility model provides a locking fastening component that takes off, includes bolt and nut (3), and the bolt includes head (1) and screw rod (2), its characterized in that: the head (1) is provided with a dustproof driving part, the dustproof driving part comprises a driving groove (101) which is arranged on the head (1) and has a non-circular cross section, and a dustproof block (4) which is elastically telescopic and can block the driving groove (101) and flush with the end surface of the head (1) or expose the driving groove (101), a containing groove (201) is arranged in the screw (2), a matching groove (5) which is communicated with the containing groove (201) is recessed on the side wall of the screw (2) along the axial direction of the screw, a telescopic part (6) which is in splicing fit with the matching groove (5) is elastically telescopic arranged in the containing groove (201), a plurality of limiting blocks (7) are elastically telescopic and arranged at one end, far away from the containing groove (201), of the telescopic part (6) along the axial direction of the screw (2), and a linkage mechanism is arranged between the telescopic part (6) and the dustproof block (4);
when the dustproof block (4) contracts towards the inside of the driving groove (101), the linkage mechanism drives the telescopic part (6) to contract, and the limiting block (7) moves along with the telescopic part (6) until the nut (3) can reciprocate in the axial direction of the screw rod (2); when the dustproof block (4) is reset to be level with the end face of the head (1), the telescopic part (6) is reset, the telescopic part (6) stretches out towards the direction of the matching groove (5), the limiting block (7) moves along with the telescopic part (6) and is positioned at the limiting blocks (7) at two ends of the nut (3), the limiting block (7) axially reciprocates on the screw (2), and the limiting block (7) opposite to the inner wall of the nut (3) elastically abuts against the inner wall of the nut (3).
2. A tamper-evident fastening assembly as claimed in claim 1, wherein: the linkage mechanism comprises a matching block (11) protruding on one side of the matching groove (5) away from the telescopic part (6), a driving chute (12) arranged along the axial direction of the screw rod (2) on the matching block (11) and a driving rod (8) protruding on one end of the dustproof block (4) close to the head part (1) and matched with the driving chute (12), along with the approach of the driving rod (8) to the tail part of the screw rod (2), the driving rod (8) props against the driving chute (12) and drives the matching block (11) to move towards one side away from the matching groove (5), and a first elastic piece (15) for driving the telescopic part (6) to be in an extending state is arranged between the matching block (11) and one side of the accommodating groove (201) away from the matching groove (5).
3. A tamper-evident fastening assembly in accordance with claim 2, wherein: the cross section shape of the driving groove (101) is right trapezoid, one end close to the head (1) is a big head end, the inclined plane of the driving groove (101) is located at one side far away from the telescopic part (6), and when the dustproof block (4) is level with the end face of the head (1), the driving rod (8) is located at the ascending slope of the inclined plane.
4. A tamper-evident fastening assembly as claimed in claim 3, wherein: one side of the telescopic part (6) far away from the matching block (11) is provided with a plurality of first grooves (601) along the axial direction of the screw rod (2) at intervals, a limiting block (7) is arranged in each first groove (601) in a telescopic way, and a second elastic piece (20) with two ends fixed with the limiting block (7) and the bottom of the first groove (601) is arranged between the limiting block and the bottom of the first groove.
5. A tamper-evident fastening assembly as defined in claim 4, wherein: be provided with between actuating lever (8) and telescopic part (6) and limit stop gear that telescopic part (6) break away from screw rod (2) when dustproof piece (4) flushes with head (1) terminal surface, stop gear includes in telescopic part (6) one end that is close to head (1) protruding block of stepping down (13), is provided with on block (13) of stepping down and can supply actuating lever (8) to pass and can supply the groove (14) (9) of stepping down that actuating lever (8) passed all the time along with the extension of telescopic part (6).
6. A tamper-evident fastening assembly as defined in claim 4, wherein: the cooperation piece (11) is located the middle part of flexible portion (6), and first elastic component (15) symmetry sets up in the both sides of cooperation piece (11), and actuating lever (8) bottom is sunken have and can supply the groove (14) (9) of stepping down that first elastic component (15) passed.
7. The anti-loosening fastening assembly of claim 6, wherein: the bottom of the driving rod (8) is provided with a pressing inclined surface (10) matched with the inclined surface of the driving chute (12).
8. A tamper-evident fastening assembly as claimed in claim 1, wherein: the driving groove (101) is internally provided with a third elastic piece (16) for driving the dustproof block (4) to be in an extending state, and a matching structure which is convenient for the dustproof block (4) to be led into the driving groove (101) and is flush with the end face of the head (1) is arranged between the dustproof block (4) and the driving groove (101) and is used for limiting the maximum extending stroke of the dustproof block (4) after the dustproof block is led into the driving groove (101).
9. A tamper-evident fastening assembly as defined in claim 8, wherein: the matching structure comprises an introduction block (17) which is elastically telescopic at two opposite sides of the dustproof block (4), a fourth elastic piece (19) which drives the introduction block (17) to be in an extending state, and a guide groove (102) which is recessed along the axial direction of the screw (2) and can be used for inserting and guiding the introduction block (17) to slide, wherein one side of the introduction block (17) close to the screw (2) is provided with an introduction inclined plane (18) which is convenient for introducing the driving groove (101).
10. A tamper-evident fastening assembly as claimed in claim 1, wherein: the cross section of the dustproof block (4) is regular polygon or ellipse.
CN202310681269.XA 2023-06-09 2023-06-09 Locking fastening component that takes off Pending CN116771783A (en)

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Application Number Priority Date Filing Date Title
CN202310681269.XA CN116771783A (en) 2023-06-09 2023-06-09 Locking fastening component that takes off

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310681269.XA CN116771783A (en) 2023-06-09 2023-06-09 Locking fastening component that takes off

Publications (1)

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CN116771783A true CN116771783A (en) 2023-09-19

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CN202310681269.XA Pending CN116771783A (en) 2023-06-09 2023-06-09 Locking fastening component that takes off

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117052773A (en) * 2023-10-10 2023-11-14 苏州森奇成型科技有限公司 Locking self-locking fastening bolt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117052773A (en) * 2023-10-10 2023-11-14 苏州森奇成型科技有限公司 Locking self-locking fastening bolt
CN117052773B (en) * 2023-10-10 2024-01-30 苏州森奇成型科技有限公司 Locking self-locking fastening bolt

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