CN112936174B - Bending strip-shaped mounting tool for split type unilateral bolt fastener - Google Patents
Bending strip-shaped mounting tool for split type unilateral bolt fastener Download PDFInfo
- Publication number
- CN112936174B CN112936174B CN202110153912.2A CN202110153912A CN112936174B CN 112936174 B CN112936174 B CN 112936174B CN 202110153912 A CN202110153912 A CN 202110153912A CN 112936174 B CN112936174 B CN 112936174B
- Authority
- CN
- China
- Prior art keywords
- split type
- bending
- connecting rod
- gasket
- bolt fastener
- 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.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention relates to a bending strip-shaped mounting tool for a split type unilateral bolt fastener, which comprises a round head bolt, a split type gasket, a sleeve, a gasket and a nut, wherein the bending strip-shaped mounting tool comprises a front end thread head and an operation connecting rod; when the bending strip-shaped mounting tool is used for mounting the split type unilateral bolt fastener, the split type unilateral bolt fastener is pushed into the mounting hole through the operation connecting rod, and in the pushing process, the included angle between the split type gasket and the horizontal plane is smaller than 15 degrees so as to enter the small-aperture mounting hole.
Description
Technical Field
The invention relates to the technical field of civil construction engineering and mechanical assembly, in particular to a bending strip-shaped mounting tool for a split type unilateral bolt fastener.
Background
At present, in the fields of civil construction and mechanical installation, the installation requirement for fastening the connection of structural members is large. In the case of bolts currently in common use, when performing a joint tightening operation on a member, a worker needs to simultaneously insert a bolt with a nut on one side of the member and then tighten the nut with a tool on the other side. The connecting and fastening method has the advantages of simple structure, convenient operation and good bearing capacity, but is only suitable for the open section components, and the common bolt and nut connecting and fastening method cannot be used in certain special occasions, such as connecting and fastening the closed section components or the components inconvenient to operate on the other side. Such as: in the steel pipe structure and the steel pipe concrete structure, the beam column connecting joint is a closed section, and the steel pipe column cannot be operated on two sides and can only be connected and installed on one side, so that the fastening and installation cannot be carried out by adopting the common bolt and nut connection fastening method. At present, no corresponding unilateral bolt product exists in the domestic market, the published related patent either weakens the bolt rod too much or has too few stress points of the bolt head, and similar products exist in the foreign market, but the prior patent or the prior product cannot apply larger pretension to the bolt in the installation stage to form a friction type bolt connecting joint, the comprehensive mechanical property of the bearing is not ideal, and the bearing is greatly limited in the application of earthquake-resistant design of a building structure.
Chinese patent with publication number CN 108571505a discloses a deformation shrinkage self-restoring split type single-side bolt fastener and its installation tool, in this application publication, after the round head bolt is sent into the installation hole by the installation tool, the split type gasket is pushed inwards by the thimble, but the tool in this application publication still has some defects, because when the split type single-side bolt fastener with smaller size specification is installed, the size of the opened hole is correspondingly smaller, and the original tool size is not changed, thereby the degree of extrusion deformation of the split type gasket on the installation tool is insufficient to pass through the opened round hole, resulting in that the split type single-side bolt fastener cannot be successfully installed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the bending strip-shaped mounting tool for the split type unilateral bolt fastener, so that the split type unilateral bolt fastener can be quickly mounted, the size and the specification of the split type unilateral bolt are smaller, and the tool has good working characteristics under the working condition that the size of an opening is correspondingly smaller, and is simple in structure and easy to operate.
The aim of the invention can be achieved by the following technical scheme:
the bending strip-shaped mounting tool comprises a round head bolt, a split gasket, a sleeve, a gasket and a nut, wherein the bending strip-shaped mounting tool comprises a front end thread head and an operation connecting rod, the front end thread head is arranged at the end part of the front section of the operation connecting rod, a bending part is arranged at the middle section of the operation connecting rod, and the bending part is a Z-shaped bending part;
when the split type unilateral bolt fastener is installed by using the bending strip-shaped installation tool, the sleeve, the gasket and the nut are sequentially sleeved on the rear section of the operation connecting rod, the round head bolt is fixedly installed on the front end screw head through threads, the split type gasket is sleeved on the middle bending section of the bending part after deformation and shrinkage, the installation hole is pushed in through the operation connecting rod, and in the pushing process, the included angle between the split type gasket and the horizontal plane is smaller than 15 degrees so as to enter the small-aperture installation hole.
Further, the split type gasket is perpendicular to the middle bending section of the bending part in the pushing process.
Further, the included angle alpha between the middle bending section and the two ends of the bending part is 75-85 degrees, and in the angle range, the split gasket can be pushed in at a small angle approximately horizontally during installation so as to enter the small-aperture installation hole.
Further, the operation connecting rod is a flat connecting rod, so that the split type gasket can realize maximum deformation and can be narrowest so as to enter the small-aperture mounting hole.
Furthermore, the width of the front section and the rear section of the operation connecting rod is the same as the diameter of the thread head at the front end, and the operation connecting rod is stable in installation and fixation.
Furthermore, the width of the middle bending section of the bending part is smaller than the length a of the leaf-shaped hole when the split type gasket deforms and contracts to the narrowest size, and the height is larger than the thickness h of the split type gasket.
Furthermore, the thickness of the operation connecting rod is smaller than the width b of the leaf-shaped hole when the split type gasket deforms and contracts to the narrowest size, so that the split type gasket can achieve the maximum deformation to be narrowest.
Further, the bending strip-shaped mounting tool further comprises a rear end thread head and a handle, wherein the rear end thread head is arranged at the end part of the rear section of the operation connecting rod, and the handle is fixedly arranged on the rear end thread head, so that the bending strip-shaped mounting tool is convenient to use and is convenient to operate by hand.
Preferably, the bending position of the Z-shaped bending part is provided with a round chamfer, so that the split type gasket, the sleeve, the gasket and the nut can be conveniently moved.
Further, before the split type unilateral bolt fastener is installed by using the bending strip-shaped installation tool, a split type gasket, a sleeve, a gasket and a nut are sequentially sleeved on the rear section of the operation connecting rod, and the threads at the bottom of the round head bolt and the threads of the thread head at the front end are screwed and fixed;
when the bending strip-shaped mounting tool is used for mounting the split type unilateral bolt fastener, firstly, the round head bolt is sent into the mounting hole, then the split type gasket is pushed to the middle bending section of the bending part, the split type gasket is pulled by hand, the split type gasket and the middle bending section of the bending part are mutually perpendicular, then the split type gasket is pinched flat to be in a deformed shrinkage state, then the operation connecting rod is pushed into the mounting hole, and the pinched split type gasket is pushed into the mounting hole.
Compared with the prior art, the invention has the following advantages:
1) The middle section of the installation tool is provided with the bending part, so that when the split type gasket is pushed into the installation hole, the included angle between the split type gasket and the horizontal plane is small and is approximately horizontal, the split type gasket can be easily pushed into the small-size installation hole, the installation difficulty of the split type unilateral bolt fastener under the condition of small opening size is solved, and the installation tool is simple in structure, easy to operate and high in installation efficiency;
2) The operation connecting rod is a flat metal strip bent at a large angle, the bending part is bent at a large angle, the size and shape design of the bending part can enable the split gasket of the split type unilateral bolt fastener with smaller size to be pushed into a corresponding mounting small hole at an approximately horizontal position under the state of deformation and shrinkage, the problem that the split gasket is difficult or even impossible to push into to complete mounting under the condition that the corresponding hole of a small-size bolt of an original mounting tool is smaller is solved, and the mounting tool matched with the split type unilateral bolt fastener is further perfected;
3) The invention has simple integral structure and only comprises four parts, thereby being convenient for manufacturing and mass production;
4) The structure and the principle of the invention can be applied to split type unilateral bolt fasteners with other specifications and sizes, and a whole set of corresponding installation tools can be formed, so that the operation is easy, and the overall adaptability and the installation efficiency are improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the front end screw head, the rear end screw head and the operating link of the present invention;
FIG. 3 is a schematic illustration of the split washer of the present invention compressed on the operating link and vented to the opening in comparison to the size of the mounting hole;
FIG. 4 is a schematic diagram showing the comparison of the dimensions of a split shim with a split shim when compressed on an operating link and vented into an opening in accordance with the present invention;
FIG. 5 is a schematic view of the present invention when the deformed and contracted self-restoring split washer is fed into the mounting hole.
Wherein: 1. front end screw thread head 2, operation connecting rod, 3, rear end screw thread head, 4, handle, 5, round head bolt, 6, split type gasket, 7, sleeve, 8, packing ring, 9, nut, 10, mounting hole.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Examples
As shown in fig. 1, the invention discloses a bending strip-shaped mounting tool for a split type unilateral bolt fastener, which comprises a round head bolt 5, a split type gasket 6, a sleeve 7, a gasket 8 and a nut 9, and is characterized in that the bending strip-shaped mounting tool comprises a front end thread head 1 and an operation connecting rod 2, the front end thread head 1 is arranged at the end part of the front section of the operation connecting rod 2, a bending part 21 is arranged in the middle section of the operation connecting rod 2, the bending part 21 is a Z-shaped bending part, a rear end thread head 3 and a handle 4 can be arranged at the rear section of the split type unilateral bolt fastener, the rear end thread head 3 is arranged at the end part of the rear section of the operation connecting rod 2, and the handle 4 is fixedly arranged on the rear end thread head 3, so that the bending strip-shaped mounting tool is convenient to use and is hand-held.
The operation link 2 is a flat link, and the included angle α between the middle bending section and the two ends of the bending portion 21 is a large angle greater than 75 °, preferably in the range of 75 ° to 85 °.
When the bending strip-shaped mounting tool is used for mounting the split type unilateral bolt fastener, the sleeve 7, the washer 8 and the nut 9 are sequentially sleeved on the rear section of the operation connecting rod 2, the round head bolt 5 is fixedly mounted on the front end threaded head 1 through threads, the split type gasket 6 is sleeved on the middle bending section of the bending part 21 after being deformed and contracted, the split type gasket 6 is pushed into the mounting hole 10 through the operation connecting rod 2, and in the pushing process, the split type gasket 6 is mutually perpendicular to the middle bending section of the bending part 21, and an included angle between the split type gasket 6 and a horizontal plane is smaller than 15 degrees.
Specific examples are given below:
a bending strip-shaped mounting tool for a split type unilateral bolt fastener is shown in fig. 1 and consists of a front end thread head 1, an operation connecting rod 2, a rear end thread head 3 and a handle 4, wherein the operation connecting rod 2 is a flat metal strip and is fixed with the front end thread head 1 and the rear end thread head 3, and a section of large-angle bending part 21 is arranged at the middle section of the operation connecting rod 2 so as to ensure that a split type gasket is pushed in at a small angle approximately horizontal.
As shown in fig. 2, the front end screw thread head 1 is a cylinder, the front end of the surface is provided with an external thread structure, the external thread size parameter is the same as the thread at the tail of the round head bolt 5 in the unilateral bolt fastener, the external thread structure can be in fastening connection with the round head bolt 5, the rear end screw thread head 3 and the front end screw thread head 1 are consistent in characteristic and are fixed with the operation connecting rod 2 together in a welding mode, the main body of the handle 4 is made of bakelite, the upper part of the handle is provided with a threaded hole, and the thread parameter is the same as the thread parameter of the rear end screw thread head 3, so that the connection and the fastening can be realized.
The whole operation connecting rod 2 is flat metal strip, adopts the material that intensity is higher, processes into the kink 21 that has a section bending angle in the middle section, and the contained angle of the middle kink and upper and lower both ends of this kink 21 is between 75 to 85 scope, and the position of operation connecting rod 2 buckling has the fillet, and convenient installation sleeve 7, washer 8 and nut 9 remove and install.
As shown in fig. 3 and 4, the widths of the upper and lower sections of the operation connecting rod 2 are similar to the diameters of the front end screw thread head 1 and the rear end screw thread head 3, the width of the middle bending section is smaller than the length a of the leaf-shaped hole when the split type gasket 6 is deformed and contracted to the narrowest size, the overall height of the operation connecting rod 2 is slightly smaller than the diameter d of the opened hole, the height of the middle bending section is slightly larger than the thickness h of the split type gasket 6, and the overall thickness of the operation connecting rod 2 is smaller than the width b of the leaf-shaped hole when the split type gasket 6 is deformed and contracted to the narrowest size, so that the split type gasket 6 can be sleeved into the bent part of the middle section of the operation connecting rod 2 at a small angle approximately horizontal in a narrower state and can be pushed.
The application method of the bending strip-shaped split unilateral bolt fastener installation tool is as follows:
before installation, the handle 4 is held by hand, the deformation and shrinkage self-recovery split type gasket 6, the sleeve 7, the gasket 8 and the nut 9 are sequentially placed at the position, close to the handle 4, of the rear end of the operation connecting rod 2 on the assembled installation tool, the threads at the bottom of the round head bolt 5 are screwed with the threads at the front end of the installation tool, and the boss of the split type gasket 6 faces the hand-held direction.
During installation, firstly, the round head bolt 5 is sent into the installation hole 10, then the split type gasket 6 is pushed to the middle bending section of the operation connecting rod 2, the split type gasket 6 is tensioned by hands, the split type gasket 6 is perpendicular to the middle bending section under the action of tension, the split type gasket 6 is located on the operation connecting rod 2 at the position similar to the small horizontal angle due to the fact that the middle bending section of the operation connecting rod 2 is provided with a large angle, then the split type gasket 6 is pinched to the state with very narrow deformation and shrinkage, the pinched deformation and shrinkage self-recovery split type gasket 6 is pushed into the installation hole 10 by the operation connecting rod 2, after the gasket reaches the position and returns to be round, the split type gasket 6 is convexly installed into the hole by pulling back the operation connecting rod 2, meanwhile, the round head bolt 5 and the split type gasket 6 are pressed tightly, and finally the sleeve 7, the gasket 8 and the nut 9 are installed, so that installation is completed.
The specific installation comprises the following steps:
1) Holding the handle 4, and sequentially placing the deformed and contracted self-recovery split gasket 6, the sleeve 7, the gasket 8 and the nut 9 on the assembled mounting tool to operate the position of the rear end of the connecting rod 2, which is close to the handle 4;
2) The bottom threads of the round head bolts 5 are screwed with the threads of the front end thread heads 1 of the installation tool, and the boss of the split type gasket 6 faces to the hand-held direction;
3) Sending the round head bolt 5 into the mounting hole;
4) Pushing the split type gasket 6 to the middle bending section of the bending part 21 of the operation connecting rod 2, tensioning the split type gasket 6 by hands, and making the split type gasket 6 vertical to the bending section under the action of pulling force, wherein the split type gasket 6 is positioned on the operation connecting rod 2 at a position similar to a small horizontal angle at the moment due to the fact that the middle bending section of the operation connecting rod 2 has a large angle;
5) Flattening the split gasket 6 to a state with very narrow deformation and shrinkage;
6) The operation connecting rod 2 is used for pushing the pinched deformed and contracted self-recovery split gasket 6 into the mounting hole 10;
7) After the gasket reaches the position and returns to round, the operation connecting rod 2 is pulled back, the convex surface of the split type gasket 6 can be installed in the hole through slight adjustment, and meanwhile, the round head bolt 5 and the split type gasket 6 are pressed;
8) The sleeve 7, the washer 8 and the nut 9 are installed according to the technical requirements, and the installation is completed.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions may be made without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (9)
1. The bending strip-shaped mounting tool for the split type unilateral bolt fastener comprises a round head bolt (5), a split type gasket (6), a sleeve (7), a gasket (8) and a nut (9), and is characterized by comprising a front end thread head (1) and an operation connecting rod (2), wherein the front end thread head (1) is arranged at the end part of the front section of the operation connecting rod (2), a bending part (21) is arranged at the middle section of the operation connecting rod (2), and the bending part (21) is a Z-shaped bending part;
when the bending strip-shaped mounting tool is used for mounting the split type unilateral bolt fastener, the sleeve (7), the gasket (8) and the nut (9) are sequentially sleeved on the rear section of the operation connecting rod (2), the round head bolt (5) is fixedly mounted on the front end threaded head (1) through threads, the split type gasket (6) is sleeved on the middle bending section of the bending part (21) after being deformed and contracted, the operation connecting rod (2) is pushed into the mounting hole (10), and in the pushing process, and the included angle between the split type gasket (6) and the horizontal plane is smaller than 15 degrees.
2. The bending strip-shaped mounting tool for the split type single-side bolt fastener according to claim 1, wherein the split type gasket (6) is mutually perpendicular to the middle bending section of the bending part (21) in the pushing process.
3. The bending strip-shaped mounting tool for the split type unilateral bolt fastener according to claim 2, wherein the included angle alpha between the middle bending section and the two ends of the bending part (21) is 75-85 degrees.
4. The bending strip-shaped installation tool for the split type single-side bolt fastener according to claim 1, wherein the operation connecting rod (2) is a flat connecting rod.
5. The bending strip-shaped installation tool for the split type unilateral bolt fastener according to claim 4, wherein the width of the front section and the rear section of the operation connecting rod (2) is the same as the diameter of the front thread head (1).
6. The bending strip-shaped mounting tool for the split type single-side bolt fastener according to claim 4, wherein the width of the middle bending section of the bending part (21) is smaller than the length a of the leaf-shaped hole when the split type gasket (6) deforms and contracts to the narrowest dimension, and the height is larger than the thickness h of the split type gasket (6).
7. The bending strip-shaped mounting tool for the split type single-sided bolt fastener according to claim 4, wherein the thickness of the operating link (2) is smaller than the width b of the leaf-shaped hole when the split type gasket (6) is deformed and contracted to the narrowest dimension.
8. The bending strip-shaped mounting tool for the split type unilateral bolt fastener according to claim 1, wherein the bending strip-shaped mounting tool further comprises a rear end thread head (3) and a handle (4), the rear end thread head (3) is arranged at the end part of the rear section of the operation connecting rod (2), and the handle (4) is fixedly arranged on the rear end thread head (3).
9. The bending strip-shaped mounting tool for the split type single-sided bolt fastener according to claim 1, wherein a round chamfer is arranged at the bending position of the Z-shaped bending part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153912.2A CN112936174B (en) | 2021-02-04 | 2021-02-04 | Bending strip-shaped mounting tool for split type unilateral bolt fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153912.2A CN112936174B (en) | 2021-02-04 | 2021-02-04 | Bending strip-shaped mounting tool for split type unilateral bolt fastener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112936174A CN112936174A (en) | 2021-06-11 |
| CN112936174B true CN112936174B (en) | 2023-05-02 |
Family
ID=76243769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110153912.2A Active CN112936174B (en) | 2021-02-04 | 2021-02-04 | Bending strip-shaped mounting tool for split type unilateral bolt fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112936174B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437149A (en) * | 2015-12-30 | 2016-03-30 | 同济大学 | Deformation retraction self-recovery type mounting tool for unilateral bolt fastener |
| CN111015566A (en) * | 2019-11-27 | 2020-04-17 | 同济大学 | Plate-shaped bending type split unilateral bolt fastener mounting tool |
| CN111055237A (en) * | 2019-11-27 | 2020-04-24 | 同济大学 | Hinge type deformation contraction self-recovery unilateral bolt fastener and mounting tool |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210732329U (en) * | 2019-04-29 | 2020-06-12 | 宁波欣阳伟业进出口有限公司 | Mounting tool of unilateral bolt |
| CN110486365A (en) * | 2019-08-02 | 2019-11-22 | 陈娟娟 | A kind of unilateral side bolt fastener and its method |
| CN110936327B (en) * | 2019-11-27 | 2020-10-02 | 同济大学 | Thimble position adjustable unilateral bolt fastener mounting tool |
| CN110900519B (en) * | 2019-11-27 | 2021-10-08 | 同济大学 | Mounting tool for sectional type split connection unilateral bolt fastener |
-
2021
- 2021-02-04 CN CN202110153912.2A patent/CN112936174B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437149A (en) * | 2015-12-30 | 2016-03-30 | 同济大学 | Deformation retraction self-recovery type mounting tool for unilateral bolt fastener |
| CN111015566A (en) * | 2019-11-27 | 2020-04-17 | 同济大学 | Plate-shaped bending type split unilateral bolt fastener mounting tool |
| CN111055237A (en) * | 2019-11-27 | 2020-04-24 | 同济大学 | Hinge type deformation contraction self-recovery unilateral bolt fastener and mounting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112936174A (en) | 2021-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103541982B (en) | A kind of Nested-type single-side bolt fastener | |
| CN112936174B (en) | Bending strip-shaped mounting tool for split type unilateral bolt fastener | |
| CN111055237B (en) | Hinge type deformation contraction self-recovery unilateral bolt fastener and mounting tool | |
| CN204566032U (en) | Times power drawbench | |
| CN211639740U (en) | Stud mounting tool | |
| CN212956942U (en) | Anti-loosening bolt ball joint for space grid structure | |
| CN111015566B (en) | Plate-shaped bending type split unilateral bolt fastener mounting tool | |
| CN211639739U (en) | Stud assembling device | |
| CN205201391U (en) | Low tone is apart from SMA moment spanner | |
| CN109236835A (en) | A kind of Lantern rivet nut | |
| CN213870670U (en) | Anti-loose nut | |
| CN100398848C (en) | Screw module with rivet function matched with nut and slope back stop jump ring and using method | |
| CN110977873B (en) | Stud bolt mounting tool and use method thereof | |
| CN205465987U (en) | Cutting ferrule formula pipeline connects extracting tool | |
| CN216306455U (en) | Anti-loosening assembly for pin nut | |
| CN212202777U (en) | Detachable aluminum alloy torque bolt | |
| CN212177621U (en) | Fastening member of punching and shearing machine | |
| CN112832519A (en) | A preloading device and pretension fixed subassembly for building templates | |
| CN108643550B (en) | Overhanging scaffold limiting device and construction method | |
| CN107299931B (en) | Improved split assembly screw | |
| CN215146563U (en) | Manual rivet nut rifle | |
| CN109058257B (en) | Fastening piece | |
| CN111350734A (en) | Unilateral fastening device and installation method thereof | |
| CN113958592A (en) | Anti-loosening assembly for pin nut | |
| CN216299133U (en) | Wire-pulling locking structure without operating gap |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |