CN108757695A - A kind of anti-loosening unit bolt nut with fixing device - Google Patents

A kind of anti-loosening unit bolt nut with fixing device Download PDF

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Publication number
CN108757695A
CN108757695A CN201810550892.0A CN201810550892A CN108757695A CN 108757695 A CN108757695 A CN 108757695A CN 201810550892 A CN201810550892 A CN 201810550892A CN 108757695 A CN108757695 A CN 108757695A
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CN
China
Prior art keywords
bolt
groove
fixed
head
circular hole
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.)
Granted
Application number
CN201810550892.0A
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Chinese (zh)
Other versions
CN108757695B (en
Inventor
王爱玲
刘彬
袁润杰
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.)
Jining Polytechnic
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Jining Polytechnic
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
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Priority to CN201810550892.0A priority Critical patent/CN108757695B/en
Publication of CN108757695A publication Critical patent/CN108757695A/en
Application granted granted Critical
Publication of CN108757695B publication Critical patent/CN108757695B/en
Active legal-status Critical Current
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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
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/02Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/04Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
    • 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
    • F16B37/00Nuts or like thread-engaging members
    • 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
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/02Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/08Locking of screws, bolts or nuts in which the locking takes place after screwing down with a cap interacting with the nut, connected to the bolt by a pin or cotter pin
    • 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
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/02Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/10Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

A kind of anti-loosening unit bolt nut with fixing device is related to electrical equipment and component of machine field, and in particular to a kind of anti-loosening unit bolt nut with fixing device, including:Bolt, fixing bolt, fixed transverse rod, groove nut, it is characterised in that:The bolt is made of upper hexagonal bolt head and bolt column, it is integral with bolt column that upper hexagonal bolt head is fixed at bolt column top, the upper hexagonal bolt head top is fixedly installed the stationary gland in rice font six press handles of band, the fixing bolt is made of upper gland, spring, upper bush, fixed vertical pole, the fixed transverse rod is made of folding head, groove bar, and the groove nut is designed as hexagonal.The invention passes through bolt, fixing bolt when connecting two or several parts outstanding by circular hole, fixed transverse rod, the use cooperation of groove nut, can effectively prevent the loosening of screw bolt and nut, to prevent the loosening of two or several parts, the generation of accident is prevented, ensures safety.

Description

A kind of anti-loosening unit bolt nut with fixing device
Technical field
The invention is related to electrical equipment and component of machine field, and in particular to a kind of with the anti-loosening of fixing device Unit bolt nut.
Background technology
When being attached to mechanical equipment and electrical equipment product component, bolt and nut connection is often to use , the electrical equipment especially in vibration environment, falling off for bolt and nut not only causes the loosening of parts, influences equipment Normal operation, and the bolt and nut to fall off, the failures such as short circuit are be easy to cause in electrical equipment, cause disaster;Bolt The connection of nut be exactly in order to make two or several parts it is firm for a long time or it is permanent be connected to one piece, how to prevent Nut is rotated relative to bolt under the action of external force, is the technology of the technical field to cause the loosening of connected parts Problem, in order to increase the fastness of bolt and nut connection, it is common practice that washer is added, even in this way, in some Special Rings Under border, especially in the environment of vibrations, it is also to be easy to loosen that the Connection Time of screw bolt and nut, which has been grown, to make the connection of parts It loosens, causes the accident.
Invention content
The invention technical problems to be solved are in view of the foregoing drawbacks, to provide a kind of with the anti-loosening of fixing device Unit bolt nut.
A kind of anti-loosening unit bolt nut with fixing device of the invention, including:Bolt, fixing bolt, fixation Cross bar, groove nut, it is characterised in that:The bolt is made of upper hexagonal bolt head and bolt column, upper hexagonal bolt head It is integral with bolt column to be fixed at bolt column top, the upper hexagonal bolt head top is fixedly installed in rice font band The stationary gland of six press handles, the angle between six press handles of the stationary gland is 60 degree, each press handle difference Positioned at upper six sides of hexagonal bolt head centre and protrude outward upper hexagonal bolt head, the press handle protrudes upper hexagonal Bolt head, which sets up separately, is equipped with circular hole one;Screw thread is provided with outside the bolt column, upper and lower directions is hollow inside the bolt column, institute Stating the centre position upper and lower directions setting on the corresponding hexagonal each side of bolt head outside bolt column, there are six fixing grooves, described solid Slot is determined with circular hole one on a vertical plane, and the fixing groove is connected to the hollow space inside bolt column, and the fixing groove is not Penetrate into top under bolt column;
The fixing bolt is made of upper gland, spring, upper bush, fixed vertical pole, and fixed head lower part is fixedly connected with Upper bush, fixed head lower part are fixedly installed spring in upper bush interior location, and the spring lower part is connected with fixation Vertical pole, for the fixed vertical pole upper socket inside upper bush, the fixed vertical pole lower part is provided with circular hole two;
The fixed transverse rod is made of folding head, groove bar, and the fixed transverse rod is the rectangular shape of flat type, the groove bar It is provided at both ends with fixed groove one, fixed plush copper, the groove bar two are provided on the upper and lower inner wall of one indent channel bar of fixed groove End fixed groove a bite is vertically arranged with connecting shaft up and down, folds head and is set as lateral T-type, and the first end of folding is protrusion, The centre of the protrusion for folding head is vertically disposed with fixed groove two, and the root of the protrusion for folding head is up and down through setting There are circular hole three, the connecting shaft of the groove bar to pass through circular hole three, the protrusion for folding head is around connecting shaft at groove bar both ends Fixed groove one in be freely rotated, it is described fold head protrusion be transferred to groove bar both ends fixed groove for the moment, fold Fixed groove two in the protrusion of head, which blocks the fixation plush copper on groove bar, keeps folding head and groove bar on the same line;
The groove nut is designed as hexagonal, and centre is provided with circular hole four, and screw thread, the groove are provided in the circular hole four Nut is respectively arranged with fixed groove three in the lower part of six facades, and the fixed groove three is penetrated through with intermediate circular hole four.
The invention by the circular hole of parts when connecting two or several parts outstanding, by bolt, Gu Determine bolt, fixed transverse rod, the use cooperation of groove nut can effectively prevent the loosening of screw bolt and nut, to prevent two Or the loosening of several parts, the generation of accident is prevented, ensures safety.
Description of the drawings
Attached drawing 1 is the structural schematic diagram of the invention.
Attached drawing 2 is the structural schematic diagram of the bolt of the invention.
Attached drawing 3 be the invention attached drawing 2 in A-A sectional view.
Attached drawing 4 be the invention attached drawing 2 in B-B sectional view.
Attached drawing 5 is the structural schematic diagram of the groove nut of the invention.
Attached drawing 6 is the structural schematic diagram of the fixing bolt of the invention.
Attached drawing 7 is the structural schematic diagram of the fixed transverse rod of the invention.
Attached drawing 8 is the structural schematic diagram of the groove bar of the invention.
Attached drawing 9 is the structural schematic diagram of the folding head of the invention.
Attached drawing 10 is that the fixed transverse rod of the invention folds the structural schematic diagram after head folds.
Shown in reference to the accompanying drawings:1- bolts, 2- fixing bolts, 3- fixed transverse rods, 4- groove nuts, the upper hexagonal bolt heads of 11-, 12- bolt columns, 13 fixing grooves, 14- stationary glands, 141- press handles, 142- circular holes one, the upper glands of 21-, 22- springs, 23- Upper bush, 24- fix vertical pole, 241- circular holes two, and 31- folds head, 32- protrusions, 33- fixed grooves two, 34- fixation plush coppers, 35- Groove bar, 36- fixed grooves one, 37- connecting shafts, 38- circular holes three, 41- fixed grooves three, 42- circular holes four.
Specific implementation mode
With reference to the accompanying drawings 1, attached drawing 2, attached drawing 3, attached drawing 4, attached drawing 5, attached drawing 6, attached drawing 7, attached drawing 8, attached drawing 9, attached drawing 10, in conjunction with Specific implementation mode is described in further detail the invention.
As shown in attached drawing 1, attached drawing 2, attached drawing 3, attached drawing 4, attached drawing 5, attached drawing 6, attached drawing 7, attached drawing 8, attached drawing 9, a kind of band is solid Determine the anti-loosening unit bolt nut of device, including:Bolt 1, fixing bolt 2, fixed transverse rod 3, groove nut 4, upper six side Type bolt head 11, bolt column 12, fixing groove 13, stationary gland 14, press handle 141, circular hole 1, upper gland 21, bullet Spring 22, upper bush 23, fixed vertical pole 24, circular hole 2 241, folding head 31, protrusion 32, fixed groove 2 33, fixation are convex First 34, groove bar 35, fixed groove 1, connecting shaft 37, circular hole 3 38, fixed groove 3 41, circular hole 4 42, it is special Sign is:The bolt 1 is made of upper hexagonal bolt head 11 and bolt column 12, and upper hexagonal bolt head 11 is fixed at spiral shell 12 top of hitching post and bolt column are integral, and upper 11 top of hexagonal bolt head is fixedly installed in six pressings of rice font band The stationary gland 14 of handle 141, the angle between six press handles 141 of the stationary gland 14 is 60 degree, each press handle 141 It is located at the centre on 11 6 sides of hexagonal bolt head and protrudes outward hexagonal bolt head 11, the press handle 141 11 part of hexagonal bolt head is provided with circular hole 1 in protrusion;Screw thread, the bolt column are provided with outside the bolt column 12 12 inside upper and lower directionss are hollow, the centre position upper and lower on the corresponding 11 each side of hexagonal bolt head in 12 outside of the bolt column To setting, there are six fixing grooves 13, and the fixing groove 13 and circular hole 1 are on a vertical plane, the fixing groove 13 and bolt Hollow space connection inside column 12, the fixing groove 13 do not penetrate into 12 times tops of bolt column;
The fixing bolt 2 is made of upper gland 21, spring 22, upper bush 23, fixed vertical pole 24,21 lower part of fixed head It is fixedly connected with upper bush 23,21 lower part of fixed head is fixedly installed spring 22 in 23 interior location of upper bush, described 22 lower part of spring is connected with fixed vertical pole 24, and 24 upper socket of fixed vertical pole is inside upper bush 23, the fixed vertical pole 24 lower parts are provided with circular hole 2 241;
The fixed transverse rod 3 is made of folding head 31, groove bar 35, and the fixed transverse rod 3 is the rectangular shape of flat type, described Groove bar 35 is provided at both ends with fixed groove 1, and fixed plush copper is provided on one 36 indent channel bar of fixed groove, about 35 inner wall 34, it is vertically arranged with connecting shaft 37 about one 36 mouthfuls of 35 both ends fixed groove of the groove bar, folds head 31 and is set as lateral T Type, described 31 one end of folding head are protrusion 32, and the centre of the protrusion 32 for folding head 31 is vertically disposed with fixed groove 2 33, The root of the protrusion 32 for folding head 31 is provided through circular hole 3 38 up and down, and the connecting shaft 37 of the groove bar 35 passes through circle Hole 3 38, the protrusion 32 for folding head 31 freely turn around connecting shaft 37 in the fixed groove 1 at 35 both ends of groove bar Dynamic, the protrusion 33 for folding head 31 folds the protrusion 32 of head 31 when being transferred to fixed groove 1 at 35 both ends of groove bar On fixed groove 2 33 block the fixation plush copper 34 on groove bar 35 folding head 31 and groove bar 35 made to be in same straight line On;
The groove nut 4 is designed as hexagonal, and centre is provided with circular hole 4 42, and screw thread, institute are provided in the circular hole 4 42 It states groove nut 4 and is respectively arranged with fixed groove 3 41, the fixed groove 3 41 and intermediate circle in the lower part of six facades Hole 4 42 penetrates through.
When using the present invention, the bolt column 12 of bolt 1 is inserted into the company for the two or several parts for needing to be fixedly connected It connects in hole, by the fixed groove 3 41 of groove nut 4, Open Side Down, and groove nut 4 is socketed in spiral shell by screw thread by spanner It is tightened on the bolt column 12 of bolt 1, finely tunes six sides of the hexagon facade of groove nut 4 and the upper hexagonal bolt head 11 of bolt 1 Shape facade is to just, making the fixed groove 3 41 of groove nut 4 overlap connection with the fixing groove 13 of bolt column 12;By two fixing bolts 2 are inserted into the circular hole 1 of symmetrical two press handles 141 point-blank on upper hexagonal bolt head 11 respectively, under Fixed vertical pole 24 is drawn, head 31 will be folded and be inserted into fixed vertical pole 24 with the fixed transverse rod 3 on the same line of groove bar 35 Circular hole 2 241 then passes through the fixed groove 41 of groove nut 4 and the fixing groove 13 of bolt column 12, is finally inserted symmetric position Fixation vertical pole 24 circular hole 2 241, unclamp fixed vertical pole 24, under the action of spring 22, fixed vertical pole 24 is opened in pulling, to It drives fixed transverse rod 3 to be stuck in the fixed groove 41 of groove nut 4, fixed cross is bumped between bolt column 12 and groove nut 4 Bar 3 effectively prevent groove nut 4 to rotate with respect to bolt column 12, prevents bolt 1 and groove nut 4 from loosening;Head will be folded 31 with connecting shaft 37 be axis turn to 35 upright position of groove bar, prevent fixed transverse rod 3 from the circular hole 2 241 of fixed vertical pole 24 Inside fall off.
The invention is connected parts by the connected circular hole of two or several parts, fixed by bolt Bolt, fixed transverse rod, groove nut use cooperation, the loosening of screw bolt and nut can be effectively prevent, to prevent two or The loosening of several parts prevents the generation of accident, ensures safety.

Claims (1)

1. a kind of anti-loosening unit bolt nut with fixing device, including:Bolt (1), fixing bolt (2), fixed transverse rod (3), groove nut (4), upper hexagonal bolt head (11), bolt column (12), fixing groove (13), stationary gland (14), press Pressure handle (141), circular hole one (142), upper gland (21), spring (22), upper bush (23), fixed vertical pole (24), circular hole Two (241) fold head (31), raised (32), fixed groove two (33), fixed plush copper (34), groove bar (35), fix Groove one (36), connecting shaft (37), circular hole three (38), fixed groove three (41), circular hole four (42), it is characterised in that:It is described Bolt (1) is made of upper hexagonal bolt head (11) and bolt column (12), and upper hexagonal bolt head (11) is fixed at bolt Column (12) top and bolt column are integral, upper hexagonal bolt head (11) top be fixedly installed in six, rice font band by The stationary gland (14) of pressure handle (141), the angle between six press handles (141) of the stationary gland (14) is 60 degree, often A press handle (141) is located at the centre on (11) six sides of hexagonal bolt head and protrudes outward hexagonal bolt head (11), hexagonal bolt head (11) is partly provided with circular hole one (142) in press handle (141) protrusion;The bolt column (12) external to be provided with screw thread, the internal upper and lower directions of the bolt column (12) is hollow, corresponding upper six outside the bolt column (12) There are six fixing groove (13), the fixing groove (13) and circles for centre position upper and lower directions setting when type bolt head (11) is each Hole one (142) is on a vertical plane, and the fixing groove (13) hollow space internal with bolt column (12) is connected to, the fixation Slot (13) does not penetrate into top under bolt column (12);
The fixing bolt (2) is made of upper gland (21), spring (22), upper bush (23), fixed vertical pole (24), described solid Determine head (21) lower part and be fixedly connected with upper bush (23), fixed head (21) lower part is fixed in upper bush (23) interior location It is provided with spring (22), spring (22) lower part is connected with fixed vertical pole (24), and fixed vertical pole (24) upper socket exists Upper bush (23) is internal, and fixed vertical pole (24) lower part is provided with circular hole two (241);
The fixed transverse rod (3) is made of folding head (31), groove bar (35), and the fixed transverse rod (3) is the cuboid of flat type Shape, the groove bar (35) are provided at both ends with fixed groove one (36), and fixed groove one (36) indent channel bar (35) is interior up and down Fixed plush copper (34) is provided on wall, fixed groove one (36) mouth in groove bar (35) both ends is vertically arranged with connecting shaft up and down (37), it folds head (31) and is set as lateral T-type, described folding head (31) one end is raised (32), described to fold the convex of head (31) The centre for playing (32) is vertically disposed with fixed groove two (33), and the root of the protrusion (32) for folding head (31) is run through up and down to be set It is equipped with circular hole three (38), the connecting shaft (37) of the groove bar (35) passes through circular hole three (38), the protrusion for folding head (31) (32) connecting shaft (37) is surrounded to be freely rotated in the fixed groove one (36) at groove bar (35) both ends, the folding head (31) Raised (33) fold the fixation in the protrusion (32) of head (31) when being transferred to fixed groove one (36) at groove bar (35) both ends Groove two (33) blocks the fixation plush copper (34) on groove bar (35), and so that folding head (31) with groove bar (35) is in same straight On line;
The groove nut (4) is designed as hexagonal, and centre is provided with circular hole four (42), and spiral shell is provided in the circular hole four (42) Line, the groove nut (4) are respectively arranged with fixed groove three (41), the fixed groove three (41) in the lower part of six facades It is penetrated through with intermediate circular hole four (42).
CN201810550892.0A 2018-05-31 2018-05-31 Anti-loosening bolt and nut combination with fixing device Active CN108757695B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810550892.0A CN108757695B (en) 2018-05-31 2018-05-31 Anti-loosening bolt and nut combination with fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810550892.0A CN108757695B (en) 2018-05-31 2018-05-31 Anti-loosening bolt and nut combination with fixing device

Publications (2)

Publication Number Publication Date
CN108757695A true CN108757695A (en) 2018-11-06
CN108757695B CN108757695B (en) 2020-07-10

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110792676A (en) * 2019-11-21 2020-02-14 徐州市金冠环保科技有限公司 Novel connection of environmental protection equipment device
CN111558429A (en) * 2020-05-28 2020-08-21 康志平 Mine stone crushing equipment
CN111963554A (en) * 2020-07-31 2020-11-20 江苏永昊高强度螺栓有限公司 Anti-rotation bolt
CN112922951A (en) * 2021-01-18 2021-06-08 吴铁成 Anti-theft bolt assembly
CN113464537A (en) * 2021-07-21 2021-10-01 宁波九龙紧固件制造有限公司 Hexagonal head bolt with hole and production process thereof
WO2021226004A1 (en) 2020-05-08 2021-11-11 Caterpillar Inc. Fastener retaining component

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2429679Y (en) * 1999-10-11 2001-05-09 张佩师 Cup-shaped security loosen-proof screw assembly
KR100869365B1 (en) * 2008-03-05 2008-11-24 한국종합설계 주식회사 Insulator holder
KR20090062281A (en) * 2007-12-12 2009-06-17 현대자동차주식회사 Loose-proof nut bolt structure
CN103267057A (en) * 2013-05-13 2013-08-28 山东高唐智泰金马量仪科技有限公司 Lock nut, lock structure using lock nut and method for mounting lock structure
CN106969021A (en) * 2017-04-20 2017-07-21 四川西普石油物资装备有限公司 Engineering machinery fastener with locking functions
CN107676363A (en) * 2017-10-30 2018-02-09 安徽凯瑞汽配制造有限公司 A kind of bolt assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2429679Y (en) * 1999-10-11 2001-05-09 张佩师 Cup-shaped security loosen-proof screw assembly
KR20090062281A (en) * 2007-12-12 2009-06-17 현대자동차주식회사 Loose-proof nut bolt structure
KR100869365B1 (en) * 2008-03-05 2008-11-24 한국종합설계 주식회사 Insulator holder
CN103267057A (en) * 2013-05-13 2013-08-28 山东高唐智泰金马量仪科技有限公司 Lock nut, lock structure using lock nut and method for mounting lock structure
CN106969021A (en) * 2017-04-20 2017-07-21 四川西普石油物资装备有限公司 Engineering machinery fastener with locking functions
CN107676363A (en) * 2017-10-30 2018-02-09 安徽凯瑞汽配制造有限公司 A kind of bolt assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110792676A (en) * 2019-11-21 2020-02-14 徐州市金冠环保科技有限公司 Novel connection of environmental protection equipment device
WO2021226004A1 (en) 2020-05-08 2021-11-11 Caterpillar Inc. Fastener retaining component
US11174890B1 (en) * 2020-05-08 2021-11-16 Caterpillar Inc. Fastener retaining component
CN111558429A (en) * 2020-05-28 2020-08-21 康志平 Mine stone crushing equipment
CN111963554A (en) * 2020-07-31 2020-11-20 江苏永昊高强度螺栓有限公司 Anti-rotation bolt
CN112922951A (en) * 2021-01-18 2021-06-08 吴铁成 Anti-theft bolt assembly
CN112922951B (en) * 2021-01-18 2022-12-06 深圳市朗固精密五金有限公司 Anti-theft bolt assembly
CN113464537A (en) * 2021-07-21 2021-10-01 宁波九龙紧固件制造有限公司 Hexagonal head bolt with hole and production process thereof

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