CN1724885A - Multifunction for antidissembling ring bolt and installing tool - Google Patents

Multifunction for antidissembling ring bolt and installing tool Download PDF

Info

Publication number
CN1724885A
CN1724885A CN 200510017794 CN200510017794A CN1724885A CN 1724885 A CN1724885 A CN 1724885A CN 200510017794 CN200510017794 CN 200510017794 CN 200510017794 A CN200510017794 A CN 200510017794A CN 1724885 A CN1724885 A CN 1724885A
Authority
CN
China
Prior art keywords
lasso
bolt
shape
endoporus
unloaded
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
CN 200510017794
Other languages
Chinese (zh)
Inventor
汪新民
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN 200510017794 priority Critical patent/CN1724885A/en
Publication of CN1724885A publication Critical patent/CN1724885A/en
Priority to PCT/CN2006/001618 priority patent/WO2007006223A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002Measures against loss of bolts, nuts or pins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B47/00Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • B23B47/28Drill jigs for workpieces

Abstract

The invention relates a multifunctional bolt anti-departing ferrule and installing tool and a bolt auxiliary. The shape of the ferrule is approximately partially spherical or of a combined shape, i.e. the top of the ferrule is approximately partially spherical and the bottom of the ferrule is of a circular truncated cone, the surface of the ferrule is smooth and has no taper inner hole, the shape of an inner hole is the same as that of a bolt head or nut, and on the condition of overly cooperating with it, the bottom has a spacer installing hollow; a wrench can not fasten the shape of the ferrule, a clamp can not clamp the shape of the ferrule, the ferrule closely cling to work-piece so as to be prized, having very strong anti-departing and anti-theft properties; the anti-loosening raised pole inserted in the hole of a work-piece has extremely reliable bolt anti-loosening function; the manufacturing process is simple; the invention can support standard or nonstandard bolts except sunk and semicircular bolts.

Description

Lasso and setting tool are unloaded in multi-functional bolt tamper
Technical field the present invention relates to the bolt annex, and lasso is unloaded in especially a kind of multi-functional bolt tamper.
The invention still further relates to the special tool that the anti-dismounting of multipurpose bolt lasso is installed.
The anti-dismounting of the existing bolt of background technique anti-theft technique, as Chinese patent application number: 200420006543.6 " the antitheft fixed cover of outer-hexagonal nut ", in the disclosed technological scheme, circle has the fixed cover of tapering not have other function, and this is an one; The fixed cover endoporus lacks and can form friction tight key structure key element with bolt head or nut, only depends on the hammering when installing, and can not guarantee formation and bolt head or nut drive fit, loses antitheft effect with regard to easy split getting off, this be its two; Being fixed with the endoporus of tapering and the bolt head or the nut of zero draft, is to form friction tight structure, and nature loses antitheft effect with regard to easy split getting off, this be its three; Will pacify packing ring when the bolt of normal reasonable disposition uses, fixed cover does not have the position that holds packing ring when installing, and back fixed cover lower plane is installed can't be close to workpiece, remove and lose antitheft effect with regard to easily being torn open instrument by sled, this be its four; The fin of fixed cover endoporus and groove to the essentially no effect of anti-detaching theft-proof, make manufacturing process become complicated on the contrary, will inevitably increase manufacture cost, this be its five.Another part Chinese patent application number: 03277170.3 " a kind of anti-theft and waterproof nut ", in the disclosed technological scheme, the blind silk hole under the circular appearance can be fastening with instrument, otherwise just can pull down, and exists theftproof performance not strong, do not have multi-purpose phenomenon.
Setting tool staking punch commonly used and bushing plate.
The summary of the invention the technical problem to be solved in the present invention is, provides a kind of anti-dismounting, theftproof performance strong, and manufacturing process is simple relatively, prevents bolt looseness again, has the multi-functional bolt tamper that beautifies outward appearance and improve human body collision safety protective concurrently and unloads lasso.
A kind of special tool that multi-functional anti-dismounting lasso is installed also is provided.
For solving the problems of the technologies described above, the technological scheme that lasso is unloaded in multi-functional bolt tamper of the present invention is: six side's endoporus are arranged in the middle of circular, the plane that can be adjacent to workpiece is arranged at the bottom, it is characterized in that the spherical profile of the approximate part of lasso, or the spherical profile that makes up with frustoconic shape of approximate part, the surface is slick and sly, the endoporus of zero draft, the endoporus of other shape is identical with bolt head that is cooperated or nut profile, and guarantee that endoporus forms radial interference fit with bolt head that is cooperated or nut, sees the position that holds bolt washer in addition from lasso lower plane direction.
The interference position of aforementioned anti-dismounting lasso endoporus, except that internal orifice dimension to whole interference, can be modified into the top that is distributed on the polygon angle of spot hole or the middle part on limit, also can be distributed on the circumference equally divided position in the circular port, be more conducive to assembling like this.
In order to alleviate the weight and the economical with materials of the anti-dismounting of solid type lasso, lasso can be made the boring type.Its endoporus also can be made the flange of downward in-plane, increases to cooperate intensity.No matter the position of construction bolt packing ring is all left in hollow type or solid type lasso bottom, avoid mutual interference, guarantee that assembling back lasso lower plane can be close on the workpiece.Also can be modified into the lasso lower plane and extend axially out one section isometrical open column shape shirt rim, but lower end, shirt rim chamfering or tapering is arranged, imbed during assembling in the fit dimension concave station prefabricated on the workpiece, also can form interference fit, further strengthen anti-dismounting performance with workpiece concave station internal diameter.
In order to make anti-dismounting lasso have the function that prevents bolt looseness, at the lower plane of aforementioned lasso, or the lower plane of shirt rim, a screw retention projection increased to a plurality of axial projections, the lower end of projection needs chamfering or tapering is arranged, in the locking protruding rod hole that is beneficial to imbed on the workpiece and is cooperated.
The endoporus of solid type lasso can be modified into blind hole, and in lasso, the appearance slyness is attractive in appearance, except that anti-disassembling function, has the function of beautifying outward appearance, and bolt is also had certain corrosion proof function the bolt clad in the installation back.Have concurrently simultaneously certain again to human body collision safety safeguard function.On this basis, further improvement also can be in the middle of the blind hole bottom, it is top to increase a reverse frustoconic screw retention, and top top also can change circular arc into, and the bolt that has two to many center crossed grooves with threaded end cooperates, after nut is fastening, this style ferrules in the punching press is utilized the top tapering of reverse frustoconic, and the screw rod end that has crossed grooves is strutted, turn over and be squeezed on the nut, and have anti-bolt looseness function.
Unload lasso for multi-functional bolt tamper of the present invention is installed, make special-purpose staking punch.The stock shape staking punch that adopts the high-quality steel to make, beat resistance shape can be made in the rear end, or with the press machine shape that tool matches that is installed.Topmostly be characterised in that the interior circular arc of staking punch front end or interior circular arc adds inner taper, add external taper with the external arc of the anti-dismounting lasso that matches or external arc and match, when preventing punching press in addition in the middle of the staking punch with the cavity of bolt head or nut interference.Bolton will prevent dismantling the lasso lower plane towards workpiece after on the workpiece, and endoporus is aimed at bolt head or nut, entangle lasso with supporting staking punch, again staking punch is applied stamping press, the lasso of interference fit tightly is enclosed within on bolt head or the nut, lower plane is close to workpiece, finishes the lasso assembling.
For lower plane of the present invention is installed the lasso of screw retention projection is arranged, bolton is after on the workpiece, identical with center hole with bolt head or nut shape, and the special jewel template of loose fit, be enclosed within on bolt head or the nut, locate with this, because of the position of locking projection on the position in drill jig hole on the bushing plate and the supporting lasso matches, lean on the spacing of drill jig hole, after getting out the hole that to imbed locking projection on the workpiece, use again aforesaid staking punch with this lasso punching press on bolt, in the inevitable boring that imbed accurately on the workpiece of the locking projection on the lasso at this moment.Form constraint mutually between workpiece, lasso, the bolt three, make anti-dismounting lasso have anti-extremely reliably bolt looseness function, finish the lasso assembling.
Lasso is unloaded in foregoing multi-functional bolt tamper, the spherical profile of approximate part, or be similar to profile partly spherical and the frustoconic shape combination, the extracting tool spanner can't block, pliers can't clamp, lower plane is close to workpiece and can't be levered up, and adopts the high-strength material heating treatment process to make, and also can anti-drilling, anti-ly saw, add the interference fit of lasso and bolt, compare with the fixed cover of no interference fit, significantly improved anti-disassembling function, this is an one.The shirt rim style ferrules, the shirt rim style ferrules that especially adopts the high-strength material heating treatment process to make, except that with the interference fit of bolt, also formed interference fit between lasso and the workpiece, make lasso have dual anti-disassembling function, this be its two.The locking projection of lasso, locking top tip structure, compare with the fixed cover of no locking functions, under the situation that does not increase materials, increased anti-quite reliably bolt looseness function, solved the bolton field and wished to have good measure to solve and asking of not resolving carried always, this be its three.After lasso is installed on the bolt, make the bolt appearance become slick and sly, compare, strengthened the function of beautifying outward appearance with the fixed cover of general appearance, this be its four.Be equipped with the bolt of lasso, the appearance slyness, the spherical profile of especially approximate part is compared with the fixed cover that rib is arranged, and has not only saved materials, the function of safety protection when also obviously having improved the human body collision, this be its five.Compare with the fixed cover that has only through hole, the blind hole style ferrules is wrapped in bolt wherein, and bolt has been produced certain corrosion proof function, this be its six.Above-described is six kinds of functions of anti-dismounting lasso.
Lasso is unloaded in aforesaid multi-functional bolt tamper, only needs to change the shape of endoporus, just can be supporting with equilateral or unequal-sided polygon bolt head or nut very easily.Certainly also be convenient to cylinder head bolt supportingly, compare with the fixed cover that structural type is single, have matching performance widely, this is an one.Compare with the fixed cover of single appearance and structural behaviour, the lasso appearance has approximate part sphere that the spherical profile that makes up with frustoconic shape of approximate part is arranged again, structural type has hollow type, solid type, shirt rim type, locking convex column type, blind hole type, the top type of blind hole etc. are arranged again, and the variation of manufactured materials.Formed the series product of plurality of specifications model and structural behaviour, had quite wide application area, this be its two.The manufacturing process of lasso is simple relatively, and cost is cheap relatively, as the hollow type that becomes with plate stamping; As require to lay particular stress on attractive in appearance, and have certain anti-disassembling function, available colored engineering plastics single injection-molded, this be its three.The structural feature of lasso has determined to install simple and convenient relatively, only needs the personnel of low technological level just can operate, this be its four.Above-described is four kinds of performances of anti-dismounting lasso.
The special-purpose staking punch that lasso is unloaded in multi-functional bolt tamper is installed, reach the structural principle of special jewel template, determined the manufacturing process of special-purpose staking punch and special jewel template, and using method is all simple and convenient relatively, also determine not easy break-down of special tool, had higher serviceability and reliability.
Description of drawings unloads lasso below in conjunction with accompanying drawing to multi-functional bolt tamper and is described in further detail:
Fig. 1 is the plan view of solid type lasso; Fig. 2 is the vertical view cutaway drawing of Fig. 1.
Fig. 3 is the plan view of hollow type lasso; Fig. 4 is the vertical view cutaway drawing of Fig. 3.
Fig. 5 is the plan view of hollow flange style ferrules; Fig. 6 is the vertical view cutaway drawing of Fig. 5.
Fig. 7 is the plan view of solid shirt rim style ferrules; Fig. 8 is the vertical view cutaway drawing of Fig. 7.
Fig. 9 is the plan view of hollow shirt rim style ferrules; Figure 10 is the vertical view cutaway drawing of Fig. 9.
Figure 11 is the plan view of solid locking convex column type lasso; Figure 12 is the vertical view cutaway drawing of Figure 11.
Figure 13 is the plan view of hollow locking convex column type lasso; Figure 14 is the vertical view cutaway drawing of Figure 12.
Figure 15 is the plan view of the locking convex column type lasso in solid shirt rim; Figure 16 is the vertical view cutaway drawing of Figure 15.
Figure 17 is the plan view of the locking convex column type lasso in hollow shirt rim; Figure 18 is the portion of the overlooking sectional view of Figure 17.
Figure 19 is the plan view of solid blind hole style ferrules; Figure 20 is the vertical view cutaway drawing of Figure 19.
Figure 21 is the plan view of the locking top style ferrules of solid blind hole; Figure 22 is the vertical view cutaway drawing of Figure 21.
Figure 23 is the local enlarged diagram of middle part interference on anti-dismounting lasso polygon endoporus limit.
Figure 24 is the local enlarged diagram of end interference of angle of spot hole in the anti-dismounting lasso polygon.
Lasso is unloaded in embodiment such as Fig. 1 and solid type shown in Figure 2, Fig. 3 and hollow type shown in Figure 4, Fig. 5 and the multi-functional bolt tamper of hollow flange type shown in Figure 6, is the most basic type.Its profile preferentially selects for use approximate part spherical, the also optional combination profile that tapering is arranged with the approximate spherical bottom of part, top, the surface is slick and sly, there is not other convex-concave distortion, just can prevent to be blocked by spanner, or be clamped by pliers, lower plane is beneficial to is close to workpiece when installing, live in case torn open the instrument sled, and can't pull down by sled.The lasso endoporus is identical with the shape of bolt head or nut, and utilizes the chamfering of bolt head or nut and be convenient to install, also can inner orifice earlier contact bolt one end also make chamfering and be more conducive to and install.Endoporus except that with the whole radial interference fit of bolt, also can be in the middle part interference fit of all limits of polygon endoporus or an edge, also can be in the end interference fit of all angles of polygon endoporus or angular interval, shown in the local enlarged diagram of Figure 23, Figure 24, suitable gap is left at other position, can more help like this installing cooperating.Circular inner hole is three position interference fit of circumference five equilibrium preferably, and appropriate gap is all left at other position.The flange of hollow flange style ferrules, comparing with hollow type has increased the cooperation of endoporus intensity.How much used packing ring can change during assembling bolt.Sometimes also double nut need be installed,, can treat the nut of nearly workpiece when packing ring, adapt to by the axial height of adjusting lasso bottom hollow position for lasso.Mounted lasso endoporus upper edge a little less than or flush in bolt head or nut.When having certain anti-dismounting to require but biasing toward outward appearance or other function, lasso can select for use non-ferrous metal or colored engineering plastic materials to make.As require anti-drilling reaching when preventing sawing, and lasso can be selected high-strength metal material for use, and heating treatment process is made.
As Fig. 7 and solid shirt rim type, Fig. 9 and the anti-dismounting of hollow shirt rim type lasso shown in Figure 10 shown in Figure 8, be on the basis of aforementioned lasso, lower plane extends axially into isometrical hollow cylindrical shirt rim, but lower end, shirt rim chamfering or tapering is arranged is imbedded during assembling in the fit dimension concave station prefabricated on the workpiece.Also can be again with workpiece on the concave station internal diameter form interference fit, further strengthen anti-dismounting performance.
As Figure 11 and solid locking convex column type, Figure 13 and hollow locking convex column type, Figure 15 and the locking convex column type in solid shirt rim, Figure 17 and the anti-dismounting of the locking convex column type in hollow shirt rim lasso shown in Figure 180 shown in Figure 16 shown in Figure 14 shown in Figure 12, be on the basis of aforementioned lasso, at lasso lower plane or shirt rim lower plane, make the locking projection of axial projections.The projection front end needs chamfering or tapering is arranged, and is beneficial to assembling.Projection is minimum to be one, and ordinary circumstance is two of symmetry, and is also a plurality of.After the bolton, put the special jewel template behind the hole that gets out the locking projection of embedding on the workpiece, promptly available special-purpose staking punch is installed this lasso.At this moment in the inevitable boring of imbedding accurately on the workpiece of the locking projection on the lasso.Form constraint mutually between workpiece, lasso, the bolt three, the lasso of locking projection also can all be installed at bolt two, except that having anti-disassembling function, also have extremely reliable anti-loosening function.Additional function as anti-dismounting lasso, under the situation that seldom increases manufacture cost, for better solving the difficult problem of bolt looseness in the bolton field, a kind of measure extremely reliably is provided, especially anti-loosening requirement height has anti-dismounting to have more advantage when requiring again.
Based on Fig. 1 and solid type lasso shown in Figure 2, be modified into as Figure 19 and the anti-dismounting of solid blind hole type lasso shown in Figure 20, after the installation with bolt cover below lasso, the appearance slyness is attractive in appearance, except that anti-disassembling function, improve the safety properties of human body collision, also improved the Corrosion Protection of bolt.Laying particular stress on when beautifying outward appearance or improving human body collision safety protective, make of plastic materials, that can significantly fall reduces cost and weight reduction.
Based on Figure 19 and solid blind hole style ferrules shown in Figure 20, be modified into as Figure 21 and the locking top style ferrules of solid blind hole shown in Figure 22.Intermediate fabrication one reverse frustoconic is top in the blind hole bottom, having two bolt matchings to many center crossed grooves with threaded end uses, after nut is fastening, this lasso in the punching press utilizes top tapering, and the screw rod end that has groove is strutted, be squeezed on the nut, except that anti-disassembling function, also has the function of well preventing bolt looseness, corrosion protection, beautifying outward appearance, the especially suitable position that should not on workpiece, bore anti-loosening protruding rod hole of this style ferrules.But to carefully design the fit dimension between lasso and thread head crossed grooves, nut, the workpiece.
Except that countersunk head, button-headed screw, other off-gauge special bolts head or nut all can design with reference to previous embodiment, change the shape of endoporus, produce the anti-dismounting of special type lasso, as bolt head or nuts such as triangle, pentagon, heptagon, inequilateral shapes.

Claims (10)

1. lasso is unloaded in a multi-functional bolt tamper, six side's endoporus are arranged in the middle of circular, the plane that can be adjacent to workpiece is arranged at the bottom, it is characterized in that the spherical profile of the approximate part of lasso, or be similar to profile partly spherical and the frustoconic shape combination, surperficial slyness, the endoporus of zero draft, the endoporus of other shape is identical with bolt head that is cooperated or nut profile, and guarantees that endoporus forms radial interference fit with bolt head that is cooperated or nut, sees the position that holds bolt washer in addition from lasso lower plane direction.
2. lasso is unloaded in multi-functional bolt tamper according to claim 1, the interference position that it is characterized in that the lasso endoporus, except that all radially evenly the interference, also can be distributed on the top of polygon angle of spot hole, the middle part on limit, or the equally divided position of circular port circumference, at this moment leave the gap between other position of endoporus and bolt head that is cooperated or the nut.
3. lasso is unloaded in multi-functional bolt tamper according to claim 1, it is characterized in that the lasso lower flat has increased the screw retention projection of axial projections, and the lower end of projection needs chamfering or tapering is arranged.
4. lasso is unloaded in multi-functional bolt tamper according to claim 1, it is characterized in that the lasso lower flat extends axially into isometrical open column shape shirt rim, imbeds during assembling in the fit dimension concave station prefabricated on the workpiece, also can form interference fit with the workpiece concave station.
5. lasso is unloaded in multi-functional bolt tamper according to claim 4, it is characterized in that the lower plane of lasso shirt rim has increased the screw retention projection of axial projections, and the lower end of projection needs chamfering or tapering is arranged.
6. lasso is unloaded in multi-functional bolt tamper according to claim 1, and the endoporus that it is characterized in that lasso is a blind hole.
7. lasso is unloaded in multi-functional bolt tamper according to claim 6, and it is locking top to it is characterized in that having increased reverse frustoconic in the middle of the lasso blind hole bottom, and top tip is circular arc also.
8. lasso is unloaded in multi-functional bolt tamper according to claim 1, and the inside that it is characterized in that lasso is hollow, the flange that endoporus also can oriented lower plane direction.
9. one kind the special-purpose staking punch that lasso is unloaded in multi-functional bolt tamper as claimed in claim 1 is installed, beat resistance shape is made in the staking punch rear end, or make and the press machine shape that tool matches that is installed, the interior circular arc or the interior circular arc that it is characterized in that the staking punch front end add inner taper, add external taper with external arc of preventing the dismounting lasso or external arc and match, prevent cavity in the middle of the staking punch in addition with the bolt interference.
10. installation such as claim 3 or the 5 described multi-functional bolt tampers special jewel template of unloading lasso, the centralized positioning hole shape that it is characterized in that bushing plate, identical with bolt head that is cooperated or nut shape, and loose fit, and locate with this, the position in drill jig hole on the bushing plate matches with anti-anti-loosening projection position of dismantling the lasso bottom.
CN 200510017794 2005-07-10 2005-07-10 Multifunction for antidissembling ring bolt and installing tool Pending CN1724885A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN 200510017794 CN1724885A (en) 2005-07-10 2005-07-10 Multifunction for antidissembling ring bolt and installing tool
PCT/CN2006/001618 WO2007006223A1 (en) 2005-07-10 2006-07-10 An anti-dissembling ferrule for bolt, a punch and a drilling plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200510017794 CN1724885A (en) 2005-07-10 2005-07-10 Multifunction for antidissembling ring bolt and installing tool

Publications (1)

Publication Number Publication Date
CN1724885A true CN1724885A (en) 2006-01-25

Family

ID=35924472

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200510017794 Pending CN1724885A (en) 2005-07-10 2005-07-10 Multifunction for antidissembling ring bolt and installing tool

Country Status (2)

Country Link
CN (1) CN1724885A (en)
WO (1) WO2007006223A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115673386A (en) * 2022-11-22 2023-02-03 沪东中华造船(集团)有限公司 Hydraulic fixed type tail pipe drilling jig tool and using method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000104720A (en) * 1998-09-25 2000-04-11 Fujikura Ltd Tamperproof cover for bolt or nut
AUPQ158099A0 (en) * 1999-07-12 1999-08-05 Goodcart Pty Limited Security screw
CN2564790Y (en) * 2002-08-21 2003-08-06 戴鸿志 Protective cover for bolt and nut
CN1417493A (en) * 2002-11-04 2003-05-14 张奎贵 Anti-theft capped screw nut

Also Published As

Publication number Publication date
WO2007006223A1 (en) 2007-01-18

Similar Documents

Publication Publication Date Title
EP1907712B1 (en) Method for fixing an accessory part to a wall and fixture set therefor
US9074617B2 (en) Security fastener for wheels with a recess hole
CN112212296B (en) Fixed anti-skid locking device and multifunctional rod comprising same
US7938610B2 (en) Lock nut
CA2314561A1 (en) A bolt and a manufacturing method thereof
CN1724885A (en) Multifunction for antidissembling ring bolt and installing tool
CN1643264A (en) Anti-theft device intended, in particular, for vehicle wheels
CN210565555U (en) Large-scale pull rod fixing device
CN201041186Y (en) Theft-proof nut
CN201535309U (en) Iron tower anti-loose anti-theft thread connecting pair
CN2692398Y (en) Three fixture type antitheft screw bolt
CN2784464Y (en) Anti-theft cover for manhole
CN211343662U (en) Anti-loosening device for pile hammer head
CN209990757U (en) Anti-loosening special-shaped combined bolt
CN214998745U (en) Locking car screw that moves
CN217207281U (en) High-strength locking nut
CN110966297B (en) Pile driving hammer head loosening prevention method and device
CN200954807Y (en) Dismounting-proof mechanism of aubomotive anti-theft lock
CN218718090U (en) Anti-theft nut
CN214998786U (en) Anti-theft anti-loose bolt
CN212985779U (en) A theftproof bolt for electric power engineering
CN218953771U (en) Antitheft screw nail
CN201391528Y (en) Theftproof bolt pair
CN215950076U (en) Embedded positioning anti-theft screw
CN2227148Y (en) Anti-theft cover for sewer monhole

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication