CN104879361A - Expansion lock bolt - Google Patents
Expansion lock bolt Download PDFInfo
- Publication number
- CN104879361A CN104879361A CN201510191941.2A CN201510191941A CN104879361A CN 104879361 A CN104879361 A CN 104879361A CN 201510191941 A CN201510191941 A CN 201510191941A CN 104879361 A CN104879361 A CN 104879361A
- Authority
- CN
- China
- Prior art keywords
- bolt
- main body
- expansion
- body bolt
- 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.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 208000005168 Intussusception Diseases 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
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
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
-
- 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
Abstract
The invention discloses an expansion lock bolt which is characterized by comprising a main bolt and a catch bolt. An external threaded structure which is matched with an internal threaded hole of a workpiece in a threaded manner is arranged on the outer circumferential surface of the main bolt, an axially through internal threaded hole is formed in the main bolt, a front section of the main bolt is an expansion section which can be radially expanded, and an axially through hollow expansion hole is formed in the expansion section; the catch bolt is matched with the internal threaded hole of the main bolt by external threads of the catch bolt in a threaded manner, the rotation direction of the catch bolt in the main bolt is opposite to the rotation direction of the main bolt in the internal threaded hole in the workpiece; a bolt front end of the catch bolt can deeply extend into the hollow expansion hole of the expansion section, so that the expansion section can be radially expanded and butted to the surface of the internal threaded hole of the workpiece. The expansion lock bolt has the advantages that loosening can be effectively prevented, the expansion lock bolt is easy to disassemble, and abrasion can be prevented.
Description
Technical field
The present invention relates to a kind of fastening piece, is more particularly a kind of fastening threaded connector.
Background technique
Plain bolt connection has certain self-locking performance, but in the process of vibration, and use in the environment that temperature variation is larger, easily cause bolt looseness even to come off, cause unnecessary loss.No matter be take metal as material or employing working of plastics, unavoidably there are wearing and tearing in disassembly process, due to the matching gap added between component of wearing and tearing, frequent easy disassembling causes because excessive wear causes connected piece to be scrapped.
Locking thread of the prior art is generally arrange elastic washer, also have and the bottom end face of bolt is set to dentation, to increase the frictional force between bolt end face and assembly parts, but these modes fundamentally can not solve the loosening problem of the threaded connector produced due to the increase of the matching gap of screw thread.
Application number is 201120276074.X, Authorization Notice No. is: it is application nylon rope on its screw thread that the utility model patent of CN202301389 U discloses " a kind of novel screw ", between internal thread and outside thread, establish one deck elastomer contact, make its embed completely at the bottom of tip of thread and tooth between gap, certain locking effect can be played.But nylon material also should not for a long time and be reused, and can not bear larger working pulling force.
Summary of the invention
The present invention is the deficiency for avoiding existing for above-mentioned prior art, provides a kind of expansion chek bolt, loosening, being easy to dismounting to effectively preventing, and avoids wearing and tearing.
The present invention is that technical solution problem adopts following technological scheme:
The structural feature of expansion chek bolt of the present invention comprises:
One main body bolt, its outer peripheral surface has the external thread structure with workpiece interior threaded hole screw-thread fit, described main body bolt has axially through interior threaded hole, and being set at the leading portion of described main body bolt can the expansion arc of radially bulging, and described expansion arc has the axially through swollen hole of hollow;
One dogbolt, described dogbolt forms screw-thread fit with the interior threaded hole of its outside thread and described main body bolt, and the rotation direction of described dogbolt in main body bolt and the rotation direction of described main body bolt in workpiece interior threaded hole are opposite direction;
The bolt front end of described dogbolt can be embedded in the swollen hole of hollow of described expansion arc, makes described expansion arc in radial bulging and is butted on the surface of workpiece interior threaded hole.
The structural feature of expansion chek bolt of the present invention is also: the vibrational power flow of the expansion arc of described main body bolt is: be set to circumferentially be uniformly distributed and having the expand tube of at least three axial notch at leading portion by described main body bolt, described hollow is swollen hole is in described expand tube cone shape hole, is embedded in described cone shape hole with the bolt front end of described dogbolt and axially different position makes described expand tube form bulging diametrically.
The structural feature of expansion chek bolt of the present invention is also: the vibrational power flow of the expansion arc of described main body bolt is: the groove be disposed radially in the expansion arc of described main body bolt, described groove is in the both sides main body bolt sidewall of symmetrical position the radial slideway in the both sides being formed as symmetrical in described main body bolt, being combined with respectively in the radial slideway in described both sides can the radially slide block that slides of slideway, described slide block is set to curved end towards the end face at the interior threaded hole center of main body bolt, point to be in the axial hole that slide block in the radial slideway in both sides is formed as the swollen hole of hollow using relative curved end, the bolt front end of described dogbolt is conical head, being embedded in described conical head on the axially different position in described axial hole makes a pair slide block form bulging dorsad diametrically.
Further: described slide block is magnetic component, the magnetic force attracted each other is utilized can to form obvolvent in the interior threaded hole of described main body bolt between a pair slide block.
Further: described slide block is connected with tile clamping plate towards the one end at the interior threaded hole center of main body bolt, the axial hole as the swollen hole of hollow is formed using a pair tile clamping plate be oppositely arranged; Described tile clamping plate are magnetic component, utilize the magnetic force attracted each other can form obvolvent in the interior threaded hole of described main body bolt between a pair tile clamping plate.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention is the internal and external threads structure forming intussusception with main body bolt and dogbolt, and Hand of spiral is contrary, stop anti-loosing effect highly significant;
2, the present invention is equipped with expansion arc, further add anti-loosing effect with the form of radial bulging;
3, the present invention adopts the structural type of expand tube at expansion arc, simply effectively, easy to implement, reliably fastening;
4, the present invention adopts the form of slide block at expansion arc, and its skid is flexible, and be easy to bulging, firm process is lighter.
Accompanying drawing explanation
Fig. 1 a is the embodiment of the present invention 1 structural representation;
Fig. 1 b is main body bolt appearance schematic diagram in the embodiment of the present invention 1;
Fig. 1 c is main body bolt internal structure schematic diagram in the embodiment of the present invention 1;
Fig. 1 d is dogbolt schematic diagram in the embodiment of the present invention 1;
Fig. 2 a is the embodiment of the present invention 2 structural representation;
Fig. 2 b is main body bolt appearance schematic diagram in the embodiment of the present invention 2;
Fig. 2 c is the A-A view of Fig. 2 b;
Fig. 2 d is main body bolt internal structure schematic diagram in the embodiment of the present invention 2;
Fig. 2 e is dogbolt schematic diagram in the embodiment of the present invention 2;
Number in the figure: 1 main body bolt, 2 interior threaded holes, 3 dogbolts, 3a conical head, 4 expansion arcs, 4a axial notch, 4b expand tube, 4c slideway, 4d slide block, 4e tile clamping plate, the 5 swollen holes of hollow.
Embodiment
Embodiment 1: see Fig. 1 a, Fig. 1 b, Fig. 1 c and Fig. 1 d, and the present embodiment is the locking EXPANSION ANCHOR BOLTS of tube-expanding type, and it comprises:
Main body bolt 1, its outer peripheral surface has the external thread structure with workpiece interior threaded hole screw-thread fit, main body bolt 1 has axially through interior threaded hole 2, and being set at the leading portion of main body bolt 1 can the expansion arc 4 of radially bulging, and expansion arc 4 has the axially through swollen hole 5 of hollow.
Dogbolt 3, dogbolt 3 forms screw-thread fit with the interior threaded hole 2 of its outside thread and main body bolt 1, and the rotation direction of dogbolt 3 in main body bolt 1 and the rotation direction of main body bolt 1 in workpiece interior threaded hole are opposite direction.
The bolt front end of dogbolt 3 can be embedded in the swollen hole 5 of hollow of expansion arc 4, makes expansion arc 5 in radial bulging and is butted on the surface of workpiece interior threaded hole.
In concrete enforcement, the vibrational power flow of the expansion arc 4 of main body bolt 1 is: be set to circumferentially be uniformly distributed and having the expand tube 4b of at least three axial notch 4a at leading portion by main body bolt 1, arrange " ten " word is provided with four axial notch 4a in the present embodiment; Hollow is swollen hole 5 is in expand tube 4b cone shape hole, is embedded in cone shape hole with the bolt front end of dogbolt 3 and axially different position makes expand tube 4b form bulging diametrically.
When implementing fastening, first main body bolt is placed in workpiece interior threaded hole with screw-thread fit, again by dogbolt with screw-thread fit in the interior threaded hole of main body bolt, until the bolt front end of dogbolt is embedded in the swollen hole of hollow of expansion arc, make the radially bulging be butted on the surface of workpiece interior threaded hole of the expand tube in expansion arc, realize locking.
Embodiment 2: see Fig. 2 a, Fig. 2 b, Fig. 2 c Fig. 2 d and Fig. 2 e, the present embodiment is the locking EXPANSION ANCHOR BOLTS of slide block type, and identical with embodiment 1, it comprises:
Main body bolt 1, its outer peripheral surface has the external thread structure with workpiece interior threaded hole screw-thread fit, main body bolt 1 has axially through interior threaded hole 2, and being set at the leading portion of main body bolt 1 can the expansion arc 4 of radially bulging, and expansion arc 4 has the axially through swollen hole 5 of hollow.
Dogbolt 3, dogbolt 3 forms screw-thread fit with the interior threaded hole 2 of its outside thread and main body bolt 1, and the rotation direction of dogbolt 3 in main body bolt 1 and the rotation direction of main body bolt 1 in workpiece interior threaded hole are opposite direction.
The bolt front end of dogbolt 3 can be embedded in the swollen hole 5 of hollow of expansion arc 4, makes expansion arc 5 in radial bulging and is butted on the surface of workpiece interior threaded hole.
The vibrational power flow being the expansion arc 4 being main body bolt 1 with difference structural type in embodiment 1 is: the groove be disposed radially in the expansion arc 4 of main body bolt 1, groove is in the both sides main body bolt sidewall of symmetrical position the radial slideway 4c in the both sides being formed as symmetrical in main body bolt 1, being combined with respectively in the radial slideway 4c in both sides can the radially slide block 4d that slides of slideway, slide block 4d is set to curved end towards the end face at the interior threaded hole center of main body bolt 1, point to be in the axial hole that slide block 4d in the radial slideway 4c in both sides is formed as the swollen hole 5 of hollow using relative curved end, the bolt front end of dogbolt 3 is conical head 3a, being embedded in conical head 3a on the axially different position in axial hole makes a pair slide block 4d form bulging dorsad diametrically, the length of slide block 4d is rationally set, make when main body bolt 1 is carried out screw-thread fit in workpiece interior threaded hole, slide block 4d does not protrude from the outer peripheral surface of main body bolt 1.
In order to ensure when main body bolt 1 is carried out screw-thread fit in workpiece interior threaded hole, interference is not caused because of slide block 4d active bulging, slide block 4d is set to magnetic component, between a pair slide block 4d, utilizes the magnetic force attracted each other can form obvolvent in the interior threaded hole of main body bolt 1.
In the present embodiment, as shown in Figure 2 c, in order to make between dogbolt 3 with slide block 4d coordinate more reliable, be connected with tile clamping plate 4e at slide block 4d towards the one end at the interior threaded hole center of main body bolt 1, the axial hole as the swollen hole 5 of hollow is formed using a pair tile clamping plate 4e be oppositely arranged, the conical head 3a of dogbolt 3 acts on a pair tile clamping plate 4e, promotes a pair slide block 4d slide in slideway by a pair tile clamping plate 4e; Can arrange a pair tile clamping plate 4e is magnetic component, utilizes the magnetic force attracted each other can form obvolvent in the interior threaded hole of main body bolt 1 between a pair tile clamping plate 4e.
When implementing fastening, first main body bolt is placed in workpiece interior threaded hole with screw-thread fit, again by dogbolt with screw-thread fit in the interior threaded hole of main body bolt, until the bolt front end of dogbolt is embedded in the swollen hole of hollow of expansion arc, promote slide block to release along slideway to both sides, and be butted on the surface of workpiece interior threaded hole, realize locking.
Claims (7)
1. an expansion chek bolt, is characterized in that comprising:
One main body bolt (1), its outer peripheral surface has the external thread structure with workpiece interior threaded hole screw-thread fit, described main body bolt (1) has axially through interior threaded hole (2), being set at the leading portion of described main body bolt (1) can the expansion arc (4) of radially bulging, and described expansion arc (4) has the axially through swollen hole of hollow (5);
One dogbolt (3), described dogbolt (3) forms screw-thread fit with the interior threaded hole (2) of its outside thread and described main body bolt (1), and the rotation direction of described dogbolt (3) in main body bolt (1) and the rotation direction of described main body bolt (1) in workpiece interior threaded hole are opposite direction;
The bolt front end of described dogbolt (3) can be embedded in the swollen hole of hollow (5) of described expansion arc (4), makes described expansion arc (5) in radial bulging and is butted on the surface of workpiece interior threaded hole.
2. expansion chek bolt according to claim 1, it is characterized in that: the vibrational power flow of the expansion arc (4) of described main body bolt (1) is: described main body bolt (1) is set to circumferentially be uniformly distributed and having the expand tube (4b) of at least three axial notch (4a) at leading portion, described hollow is swollen hole (5) is in described expand tube (4b) cone shape hole, is embedded in described cone shape hole with the bolt front end of described dogbolt (3) and axially different position makes described expand tube (4b) form bulging diametrically.
3. expansion chek bolt according to claim 2, is characterized in that: described axial notch (4a) is four of the distribution in " ten " word.
4. expansion chek bolt according to claim 1, it is characterized in that: the vibrational power flow of the expansion arc (4) of described main body bolt (1) is: the groove be disposed radially in the expansion arc (4) of described main body bolt (1), described groove is in the both sides main body bolt sidewall of symmetrical position the radial slideway (4c) in the both sides being formed as symmetrical in described main body bolt (1), being combined with respectively in the radial slideway (4c) in described both sides can the radially slide block (4d) that slides of slideway, described slide block (4d) is set to curved end towards the end face at the interior threaded hole center of main body bolt (1), point to be in the axial hole that slide block ((4d)) in the radial slideway ((4c)) in both sides is formed as the swollen hole of hollow (5) using relative curved end, the bolt front end of described dogbolt (3) is conical head (3a), being embedded in described conical head (3a) on the axially different position in described axial hole makes a pair slide block ((4d)) form bulging dorsad diametrically.
5. expansion chek bolt according to claim 4, it is characterized in that: described slide block (4d) is magnetic component, between a pair slide block (4d), utilize the magnetic force attracted each other can form obvolvent in the interior threaded hole of described main body bolt (1).
6. expansion chek bolt according to claim 4, it is characterized in that: described slide block (4d) is connected with tile clamping plate (4e) towards the one end at the interior threaded hole center of main body bolt (1), form the axial hole as the swollen hole of hollow (5) using a pair tile clamping plate (4e) be oppositely arranged.
7. expansion chek bolt according to claim 6, it is characterized in that: described tile clamping plate (4e) are magnetic component, between a pair tile clamping plate (4e), utilize the magnetic force attracted each other can form obvolvent in the interior threaded hole of described main body bolt (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191941.2A CN104879361A (en) | 2015-04-21 | 2015-04-21 | Expansion lock bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191941.2A CN104879361A (en) | 2015-04-21 | 2015-04-21 | Expansion lock bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104879361A true CN104879361A (en) | 2015-09-02 |
Family
ID=53946992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510191941.2A Pending CN104879361A (en) | 2015-04-21 | 2015-04-21 | Expansion lock bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104879361A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015265A (en) * | 2016-06-03 | 2016-10-12 | 河南科技大学 | Internal screw for check bolt, and check bolt assembly |
| CN106089887A (en) * | 2016-08-31 | 2016-11-09 | 吴金平 | A kind of bullet anti-loose expansion fastener of swollen type |
| CN106333611A (en) * | 2016-11-03 | 2017-01-18 | 中山市和美电器燃具有限公司 | Fixed detachable fixing seat of oven |
| CN107304780A (en) * | 2016-04-25 | 2017-10-31 | 李奇 | Expansion fastening device |
| CN107524677A (en) * | 2016-05-27 | 2017-12-29 | 林易攸 | Expansion screw without bar planting glue |
| CN109015039A (en) * | 2018-10-20 | 2018-12-18 | 贵州航铄工业股份有限公司 | A kind of thin-walled parts processing bit combination fixture with threaded hole |
| US10267346B2 (en) | 2016-04-25 | 2019-04-23 | Chi Li | Expandable fixing device |
| CN110107575A (en) * | 2019-05-30 | 2019-08-09 | 河北鑫泰轴承锻造有限公司 | A kind of primary and secondary setscrew component |
| CN110307232A (en) * | 2019-07-03 | 2019-10-08 | 王仲文 | A kind of screw for preventing from loosening |
| CN110905897A (en) * | 2019-11-14 | 2020-03-24 | 深圳市大富科技股份有限公司 | Expansion screw |
| CN111022458A (en) * | 2019-11-19 | 2020-04-17 | 承庚机械科技(上海)有限公司 | Tear open formula pin structure open |
| CN111306162A (en) * | 2018-12-12 | 2020-06-19 | 天津卓帛科技发展有限公司 | Automobile locking screw |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2671717A1 (en) * | 1991-01-17 | 1992-07-24 | Asa Laboratoires Prothaid | Expansion bolt for the fixation of a ligament prosthesis on the cortical wall of a bone |
| CN2148850Y (en) * | 1992-09-27 | 1993-12-08 | 成永生 | Multi-purpose expansion wall nail |
| JPH08200331A (en) * | 1995-01-19 | 1996-08-06 | Kyoritsu Kinzoku Kogyo Kk | Joint bar tool with anchor and anchor |
| CN201526572U (en) * | 2009-11-14 | 2010-07-14 | 山西大同大学 | Nut embedded resin anchoring bolt |
| CN102410294A (en) * | 2011-11-17 | 2012-04-11 | 中铁十五局集团有限公司 | Top tightening-type self-locking bolt |
| CN102865277A (en) * | 2012-09-28 | 2013-01-09 | 王利烨 | Anti-dropping fastener |
| CN204572722U (en) * | 2015-04-21 | 2015-08-19 | 合肥工业大学 | The locking EXPANSION ANCHOR BOLTS of a kind of slide block type |
| CN204572727U (en) * | 2015-04-21 | 2015-08-19 | 合肥工业大学 | The locking EXPANSION ANCHOR BOLTS of a kind of tube-expanding type |
-
2015
- 2015-04-21 CN CN201510191941.2A patent/CN104879361A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2671717A1 (en) * | 1991-01-17 | 1992-07-24 | Asa Laboratoires Prothaid | Expansion bolt for the fixation of a ligament prosthesis on the cortical wall of a bone |
| CN2148850Y (en) * | 1992-09-27 | 1993-12-08 | 成永生 | Multi-purpose expansion wall nail |
| JPH08200331A (en) * | 1995-01-19 | 1996-08-06 | Kyoritsu Kinzoku Kogyo Kk | Joint bar tool with anchor and anchor |
| CN201526572U (en) * | 2009-11-14 | 2010-07-14 | 山西大同大学 | Nut embedded resin anchoring bolt |
| CN102410294A (en) * | 2011-11-17 | 2012-04-11 | 中铁十五局集团有限公司 | Top tightening-type self-locking bolt |
| CN102865277A (en) * | 2012-09-28 | 2013-01-09 | 王利烨 | Anti-dropping fastener |
| CN204572722U (en) * | 2015-04-21 | 2015-08-19 | 合肥工业大学 | The locking EXPANSION ANCHOR BOLTS of a kind of slide block type |
| CN204572727U (en) * | 2015-04-21 | 2015-08-19 | 合肥工业大学 | The locking EXPANSION ANCHOR BOLTS of a kind of tube-expanding type |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10267346B2 (en) | 2016-04-25 | 2019-04-23 | Chi Li | Expandable fixing device |
| CN107304780A (en) * | 2016-04-25 | 2017-10-31 | 李奇 | Expansion fastening device |
| CN107524677A (en) * | 2016-05-27 | 2017-12-29 | 林易攸 | Expansion screw without bar planting glue |
| CN106015265A (en) * | 2016-06-03 | 2016-10-12 | 河南科技大学 | Internal screw for check bolt, and check bolt assembly |
| CN106089887A (en) * | 2016-08-31 | 2016-11-09 | 吴金平 | A kind of bullet anti-loose expansion fastener of swollen type |
| CN106333611A (en) * | 2016-11-03 | 2017-01-18 | 中山市和美电器燃具有限公司 | Fixed detachable fixing seat of oven |
| CN109015039A (en) * | 2018-10-20 | 2018-12-18 | 贵州航铄工业股份有限公司 | A kind of thin-walled parts processing bit combination fixture with threaded hole |
| CN111306162A (en) * | 2018-12-12 | 2020-06-19 | 天津卓帛科技发展有限公司 | Automobile locking screw |
| CN110107575A (en) * | 2019-05-30 | 2019-08-09 | 河北鑫泰轴承锻造有限公司 | A kind of primary and secondary setscrew component |
| CN110307232A (en) * | 2019-07-03 | 2019-10-08 | 王仲文 | A kind of screw for preventing from loosening |
| CN110307232B (en) * | 2019-07-03 | 2023-06-16 | 浙江启冠精工机械股份有限公司 | Screw capable of preventing loosening |
| CN110905897A (en) * | 2019-11-14 | 2020-03-24 | 深圳市大富科技股份有限公司 | Expansion screw |
| CN111022458A (en) * | 2019-11-19 | 2020-04-17 | 承庚机械科技(上海)有限公司 | Tear open formula pin structure open |
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