CN102691712A

CN102691712A - Detachable anti-loosing and anti-theft bolt structure

Info

Publication number: CN102691712A
Application number: CN2012101888919A
Authority: CN
Inventors: 赵群燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-28
Filing date: 2012-05-28
Publication date: 2012-09-26
Anticipated expiration: 2032-05-28
Also published as: CN102691712B

Abstract

The invention relates to a fastening piece, in particularly a detachable anti-loosing and anti-theft bolt structure. The detachable anti-loosing and anti-theft bolt structure mainly comprises a bolt and a nut, and is characterized in that a threaded section of the bolt comprises an upper section and a lower section which are fabricated integrally; threads of the upper section and the lower section are same; the diameter of the upper section is smaller than that of the lower section to ensure that the threads of the upper section does not contact the threads of the nut; the threads of the upper section and the threads of the lower section are staggered for a half screw pitch to ensure that gear peaks and gear valleys of the threads of the upper section are opposite to gear peaks and gear valleys of the threads of the nut; a snap spring which is made of a shape memory alloy material is accommodated in a space which is formed by at least one circumferential gear valley; and the threads of the lower section of the bolt are matched with the threads of the nut. The detachable anti-loosing and anti-theft bolt structure can be screwed down by using a standard tool to realize a reliable self-locking function, and the nut cannot become loosed automatically, so that the detachable anti-loosing and anti-theft bolt structure has high anti-loosing and anti-theft function. When the detachable anti-loosing and anti-theft bolt structure is required to be disassembled, the nut is heated to ensure that the snap spring is separated from the nut, and then the bolt can be unscrewed by using a wrench, so that the conventional destructive disassembly is avoided, and waste is reduced.

Description

Dismountable locking, anti-theft bolt structure

Technical field

The present invention relates to fastening piece, particularly a kind of dismountable anti-theft bolt.

Background technique

Bolt is the most frequently used fastening piece, tightens or dismantles through conventional tools such as spanners, can be widely used in the fastening occasion of various needs.Many electrical equipment or devices out of doors all are to use bolt, like automotive number plate, wheel, storage battery, and street lamp electrical equipment, transformer, air-conditioning outer machine or the like, the robber only needs with spanner just detachable.Multiple anti-theft bolt has appearred in existing technology, and most of anti-theft bolts are to change hexagon nut into abnormity, does not have counter-rotational point of application of force, perhaps hexagon nut is twisted into two parts, shown in Chinese patent 200910191325.1 disclosed a kind of anti-demounting bolts.These schemes all are to make bolt permanent on-dismountable; But in fact more device is need be dismountable; Such as maintenance, resettlement etc., this just needs to be equipped with the special tool that adapts, and these special tools can exist in a large number; As long as copy out or use special tool, still can not solve stolen problem.

In addition, need prevent after the bolton to get loose, the most frequently used is spring washer, but effectively locking reliability is not high.Chinese patent 02231475.X has introduced a kind of self-locking antitheft bolt; On screw rod, be provided with at least one groove; The both ends of the surface of this groove are perpendicular with the axis of screw rod respectively, and the bottom surface of groove and the axis of screw rod be hemistich mutually, and the side of groove is a concave curved surface; The direction from shallow to dark and the thread rotary orientation on the bolt of groove are consistent, and the side length of groove slightly is longer than the diameter of steel ball.During use, steel ball is placed in the groove of bolt, and nut is threaded to the groove of bolt.When nut when tightening, nut can not be stuck; Otherwise nut is stuck, and nut can not revolved.So except irreversible, also there is complex structure in the solution of existing techniques, processing difficulties, relative defective such as with high costs.

Summary of the invention

Technical problem to be solved by this invention is to overcome the existing in prior technology defective, provides that a kind of available standards instrument turns, simple in structure, with low cost and dismountable locking, anti-theft bolt structure.

Technological scheme of the present invention is following: a kind of dismountable locking, anti-theft bolt structure; Form by screw bolt and nut; The thread section that it is characterized in that bolt is made into integration by two sections, and the screw thread of two sections is identical, but the diameter of epimere is less than the diameter of hypomere; Make it not contact with the screw thread of nut; The screw thread of epimere and the screw thread of the hypomere half pitch that staggers makes the tooth peak of tooth peak, tooth paddy and the nut top screw thread of the screw thread of epimere, tooth paddy relatively, have at least one spiral circumference space content to put the jump ring of being processed by shape memory alloy material at the formed relatively spiral circuferential spacing of above-mentioned bolts and nuts tooth paddy respectively; The internal thread number of turns of nut is more than the bolt hypomere outside thread number of turns, the screw-thread fit of the screw thread of bolt hypomere and nut bottom.

Said jump ring is oval in the shape of a spiral C type circle when normal temperature; The heating back is the circular C type of a spiral circle, just binds round in the tooth paddy of bolt epimere screw thread.Like this, heating when mounted, jump ring is that circular C type circle can not contact with the internal thread of nut, and the screw thread of bolt hypomere is cooperated with nut thread.After installing, along with the reduction of temperature, jump ring returns to the oval C type of spiral circle, and its different position is stuck in the tooth paddy of nut thread and bolt thread respectively simultaneously, and bolt can not continue advance and retreat.

The length of said bolt epimere is 1-3 pitch.

The present invention needs dismounting and occasion locking, antitheft after being specifically designed to bolton, and nut can directly adopt standard piece, and bolt adopts standard piece machine shaping, can use conventional tool to tighten.Because jump ring is in continuous helix tooth paddy, to make deformed movement, have the characteristics of step-less adjustment locking elasticity, connected piece thickness accommodation is bigger; Because no matter the bolt precession is in which kind of position; All can automatically lock in this precession position after the cooling, produce reliable auto-lock function, nut can not get loose voluntarily; Promptly use spanner also can't twist, have higher stopping anti-theft feature.The present invention has broken through traditional jump ring only can be in a specific annular spring groove locking position, the qualification that connected piece thickness is single.When needs are dismantled, as long as the nut place is heated, jump ring is separated with nut, promptly available spanner withdraws from, and has avoided traditional destructiveness dismounting, cuts the waste.

Description of drawings

Further illustrate particular content of the present invention below in conjunction with accompanying drawing and embodiment.

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the plan view or the worm's eye view of product shown in Figure 1.

Fig. 3 is the plan view after jump ring 3 is heated among Fig. 1.

Fig. 4 is jump ring 3 cooled plan views among Fig. 1.

Description of symbols among the figure: 1, bolt; 11, the tooth paddy of bolt thread; 12, the tooth peak of bolt thread; 2, nut; 21, the tooth paddy of nut thread; 22, the tooth peak of nut thread; 200, spiral circuferential spacing; 3, jump ring.

Embodiment

With reference to accompanying drawing, the thickness of nut 2 of the present invention should be greater than the length of bolt hypomere, and is corresponding with the epimere outside thread of bolt with a few circle internal threads of reserving the upper end, the usefulness of confession locking.The head of standard piece bolt 1 is carried out undergauge processing with lathe, and cut-off is that to be slightly larger than the spiral shell of its screw thread dark, does not contact with the screw thread of nut when stretching into nut to be as the criterion.The undergauge section is called epimere, and the undergauge section is not called hypomere, and the length of epimere is advisable with 1-3 pitch, and hypomere is the fastening functional section that cooperates with nut thread.Process 1-3 circle screw thread in the epimere half pitch that staggers earlier; The screw thread of last hypomere is identical; Like this; When the bolts and nuts screw-thread fit, the tooth peak 22 of the tooth peak 12 of bolt epimere screw thread, tooth paddy 11 and nut thread, tooth paddy 21 respectively relatively, tooth paddy 11 and tooth paddy 21 form can ccontaining jump ring spiral circuferential spacing 200.

Jump ring 3 adopts shape memory alloy material to make, and this material has the round trip memory function, also is that cold conditions (normality) is the straight line strip, and hot is the bung flange shape, and deformation temperature is greater than 100 ℃.During use; Intercepting one segment length is equivalent to the lines of the girth of bolt epimere thread paddy when normality; Be around in the tooth paddy of bolt epimere screw thread, with the baking rifle this shape memory allow wires bar heated then, make it lock ring forms the circular C type of spiral circle in the tooth paddy 11 of bolt epimere screw thread jump ring 3; At this moment the maximum diameter of jump ring 3 is less than the minimum diameter of nut thread; Jump ring 3 does not contact with the screw thread of nut when making the bolt epimere stretch into nut, continues to turn bolt or nut with spanner, finishes until fastening.After this, along with the reduction of temperature, jump ring 3 recovers shape to vertical element trend gradually, but because the restriction of nut thread tooth paddy, finally forms the oval C type loop-shaped of spiral and becomes normality.Because jump ring is positioned at tooth paddy 11 and tooth paddy 12 formed spiral spaces; The major axis two ends of oval C type spiral round jump ring are stuck in the nut teeth paddy 12; The minor axis end of oval C type spiral ring is stuck in the bolt tooth paddy 11; At this moment also can't rotating bolt or nut with spanner, thus realize the lock function of jump ring, reach purpose locking, antitheft.

If the shape memory allow wires bar is the 2-3 circle in the tooth paddy of bolt epimere screw thread; Can form the ellipse coil spring shape after the cooling; To have more position is stuck in respectively in nut teeth paddy 12 and the bolt tooth paddy 11; The stopping performance is more reliable, be applicable to requirement higher such as the bigger device of vibrations such as the traffic tool.

In the time need bigger Applicable scope being arranged to connected piece; Can nut be made thicker; Make it the internal thread of more circle, such as being shaped on 10 road internal threads, wherein 5 roads are fastening used as cooperating with bolt thread; 5 then other road thread paddy all can be used for cooperating locking with jump ring, also are that the suitable thicknesses excursion of connected piece is equivalent to 5 road pitch sums.

When the needs dismounting device; As long as nut is heated with the baking rifle, make the jump ring of the shape-memory in the nut return to the spiral circle form of lock ring in the tooth paddy 11 of bolt epimere screw thread, jump ring separates with nut; Be that available spanner unclamps nut, realize dismountable purpose.

Claims

1. dismountable locking, anti-theft bolt structure; Form by screw bolt and nut; The thread section that it is characterized in that bolt is made into integration by two sections, and the screw thread of two sections is identical, but the diameter of epimere is less than the diameter of hypomere; Make it not contact with the screw thread of nut; The screw thread of epimere and the screw thread of the hypomere half pitch that staggers makes the tooth peak of tooth peak, tooth paddy and the nut top screw thread of the screw thread of epimere, tooth paddy relatively, have at least one spiral circumference space content to put the jump ring of being processed by shape memory alloy material at the formed relatively spiral circuferential spacing of above-mentioned bolts and nuts tooth paddy respectively; The internal thread number of turns of nut is more than the bolt hypomere outside thread number of turns, the screw-thread fit of the screw thread of bolt hypomere and nut bottom.

2. according to said dismountable locking, the anti-theft bolt structure of claim 1, it is characterized in that said jump ring oval in the shape of a spiral C type circle when normality; Deformation state is the circular C type of a spiral circle, just binds round in bolt epimere and the formed relatively spiral circuferential spacing of nut teeth paddy.

3. according to said dismountable locking, the anti-theft bolt structure of claim 2, it is characterized in that the external diameter of the circular C type of said spiral circle is slightly less than the minimum diameter of nut.

4. according to said dismountable locking, the anti-theft bolt structure of claim 1, the length that it is characterized in that said bolt epimere is 1-3 pitch.