CN114918877A - Multifunctional bolt fastening and dismounting device - Google Patents
Multifunctional bolt fastening and dismounting device Download PDFInfo
- Publication number
- CN114918877A CN114918877A CN202210561761.9A CN202210561761A CN114918877A CN 114918877 A CN114918877 A CN 114918877A CN 202210561761 A CN202210561761 A CN 202210561761A CN 114918877 A CN114918877 A CN 114918877A
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- fixing
- stud
- detacher
- fixing ring
- ring
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- 238000003825 pressing Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 101100537937 Caenorhabditis elegans arc-1 gene Proteins 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009414 blockwork Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011172 small scale experimental method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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
- B25B29/00—Accessories
- B25B29/02—Bolt tensioners
-
- 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
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
The invention relates to a multifunctional bolt fastening detacher which comprises a fixing ring and fixing devices arranged on the fixing ring, wherein the fixing devices are uniformly arranged on the top surface of the fixing ring, each fixing device comprises a fixing block arranged on the top surface of the upper fixing ring or the fixing ring and a stud matched with the fixing block in a threaded manner, and the fixing ring is in a ring shape. The fixing device can fix and place the bolt in the dismounting and fixing work, the bolt rotates, the device is small in size and convenient to carry, meanwhile, a large amount of manpower and material resources can be saved, the power failure time is reduced, and the utilization rate of the transformer is increased.
Description
Technical Field
The invention relates to the technical field of electrical equipment, in particular to a multifunctional bolt fastening and dismounting device.
Background
In operating electrical equipment many devices are equipped with ceramic insulator terminals, for example: the transformer of the transformer area, the main transformer of the transformer substation, the CT and the PT are all provided with ceramic insulator binding posts. Loosening between the binding post and the insulator often occurs due to old equipment or factory installation and the like, and the binding post is provided with threads and a nut; when the nut is screwed by a spanner during maintenance, the loosened binding post can rotate along with the nut, so that the nut cannot be screwed out.
The damage of the loosening of the binding post is great: 1. the loose part can cause oil leakage of the transformer. 2. When the nut is screwed, the binding post rotates, and the linking part of the lower end of the binding post and the coil is easy to break. 3. The nut is difficult to disassemble during maintenance, so that the lead on the binding post is difficult to replace. 4. The binding post is a cylinder, the wrench cannot be clamped, and the clamp is not tight and easily damages the thread.
Previously, it took an hour, or even half a day, to repair a loose terminal. Once the operation is careless, the binding post rotates together with the nut, so that the joint of the lower end coil is broken, a power failure plan needs to be applied, the transformer needs to be returned to the factory for maintenance, a large-scale mechanical vehicle needs to hoist and transport, and a large amount of manpower and material resources are consumed. And meanwhile, the utilization rate is reduced due to power failure.
The patent number is CN 203738683U discloses a bolt-up detacher, including first rope, seat A, jack and seat B, the jack is located between seat A and the seat B, is equipped with two hole A on the seat A, and first rope passes two hole A backs in proper order and is connected with first spanner, places seat A, jack and seat B in suitable position, selects the first rope of suitable length, and the jack output pushes away seat A and stimulates first rope to realize twisting first spanner in a certain angle.
In this scheme, when carrying out the bolt-up and dismantling, need certain installation time, and then long, the operation is very inconvenient for the lengthened construction.
Patent number CN 103233965B discloses a fastening bolt assembly, which comprises a limit nut, a fastening bolt, a fixing stud and a fixing bolt, wherein the limit nut and the fastening bolt are used in cooperation as an installation assembly; the fixing stud is matched with the fixing bolt for use and used as a part for fixing the mounted device.
In the scheme, the large bolts are not convenient to fasten, and the bolts are not fixed, so that the fastening is very troublesome.
Disclosure of Invention
The invention aims to provide a multifunctional bolt fastening and dismounting device which can well fix a bolt on a binding post and fasten or dismount a nut.
The technical scheme of the invention is as follows:
the fixing device comprises a fixing ring and fixing devices arranged on the fixing ring, wherein the fixing devices are uniformly arranged on the top surface of the fixing ring;
the fixing device comprises a fixing block arranged on the upper fixing ring or the top surface of the fixing ring and a stud in threaded fit with the fixing block;
the fixed ring is in a ring shape.
Furthermore, the fixed ring is formed by correspondingly connecting the end parts of the two arc-shaped plates to form a circular ring shape.
Furthermore, the connecting device comprises a first screw hole and a connecting screw, the first screw hole is formed in the end face of the upper end of the arc plate, the first screw hole is formed in the arc plate and corresponds to the first screw hole in an up-down and tight-fit mode, and the connecting screw is in threaded fit with the first screw hole.
The disassembling device comprises telescopic rods symmetrically arranged on the fixing ring, a lifting table connected with the end part of the telescopic rods, a motor arranged on the lifting table, a connecting column fixedly connected with a rotating shaft of the motor, a second screw hole arranged at the bottom of the connecting column, a fixing stud in threaded fit with the second screw hole and a disassembling sleeve arranged at the bottom of the fixing stud;
the connecting column is arranged on the lower side of the lifting platform, and the dismounting sleeve is right opposite to the central position of the fixing ring.
Furthermore, the fixing stud is connected with the disassembling sleeve in a limiting and rotating mode.
Furthermore, a rotating handle is arranged at the outer end part of the stud.
Further, a pressing block is arranged at the inner end part of the stud.
Further, be provided with the mounting groove on solid fixed ring's the top surface, the bottom of telescopic link is in the mounting groove with gu fixed ring can dismantle the connection.
Furthermore, a spring is arranged between the pressing block and the stud, one end of the spring is connected with the inner end part of the stud, and the other end of the spring is connected with the end part of the pressing block.
Furthermore, the bottom surface of the arc-shaped plate is provided with a squeezing pad, and the squeezing pad is the same as the inner arc degree of the arc-shaped plate.
Compared with the prior art, the invention has the beneficial effects that:
1. the fixing device can fix and place the bolt in the dismounting and fixing work, and the bolt rotates.
2. Set up the briquetting of double-screw bolt tip for the nylon material can effectively protect the screw thread on the terminal not receive the damage, can also increase frictional force, more effectual terminal that compresses tightly guarantees that the terminal can not follow the nut and rotate together to easily back out the nut
3. The motor rotates and can drive the dismantlement sleeve and can unscrew the nut on the bolt, reduces the manual operation in order to avoid taking place the accident.
4. The telescopic link can drive and dismantle the sleeve and adjust the height of work from top to bottom.
5. The extrusion pad is placed with the solid fixed ring and crushes the terminal in the during operation, play the effect of buffering
6. The spring can play a role in buffering when the pressing block works.
7. The device is small in size and convenient to carry, can save a large amount of manpower and material resources, reduces power failure time and increases the utilization rate of the transformer.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the structure of the arc plate and the fixing block of the present invention;
FIG. 3 is a schematic structural view of a fixing block, a stud, a rotating handle and a pressing block of the present invention;
FIG. 4 is a schematic structural view of a mounting groove, a first screw hole and a connecting screw according to the present invention;
FIG. 5 is a schematic view of the structure of the elevating platform, the motor, the connecting column and the telescopic rod of the present invention;
FIG. 6 is a schematic structural view of a connecting post, a second screw hole, a fixing stud and a dismounting sleeve of the present invention;
FIG. 7 is a schematic view of the structure of the pressing block and the spring of the present invention;
FIG. 8 is a schematic view of the squeeze pad of the present invention.
Wherein, the reference numbers and component names in fig. 1 to 8 are as follows:
1. an arc-shaped plate;
2. pressing the cushion;
3. a fixed block;
301. a stud;
302. rotating the handle;
303. briquetting;
304. a spring;
4. mounting grooves;
5. a first screw hole;
6. a connecting screw;
7. a lifting platform;
701. a motor;
702. connecting columns;
703. a second screw hole;
704. fixing the screw rod;
705. disassembling the sleeve;
8. a telescopic rod.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
As shown in fig. 1 to 4, an embodiment of the present invention includes a fixing ring and a fixing device, the fixing ring plays a role of supporting the whole device as a whole, the fixing device can fix the terminal to facilitate fastening and detaching of the bolt, it should be noted that the fixing ring is sleeved on the terminal, and the bolt is fixed and detached after being placed stably.
As shown in fig. 4, in the fixing device, the fixing block 3 is fixedly welded on the top surface of the fixing ring, the stud 301 is connected with the fixing block 3 in a threaded fit manner, when the stud 301 is rotated clockwise, the end part of the stud extends towards the inner side of the fixing ring to fasten the binding post, so that a constructor can conveniently unscrew or fasten a nut on the bolt.
It should be further noted that the rotation strength and the extending length of the stud 301 need to be taken into consideration during the fastening process, so that the binding post cannot be damaged during the fastening process.
As shown in fig. 3, in the practical use process, in order to facilitate the installation of the fixing ring on the binding post, the fixing ring in a ring shape can be formed by the ends of the two arc-shaped plates 1 with the same shape and size, the arc-shaped plates 1 can be connected at the ends, and in the working process, the binding post is sleeved with the two arc-shaped plates 1 to be fastened and disassembled.
As an alternative to the connection of the two arcuate plates 1, as shown in fig. 4, a connecting device may be provided to connect the two arcuate plates 1, wherein, the connecting device comprises a first screw hole 5 and a connecting screw 6, the first screw hole 5 is arranged on the end surface of the upper end part of the arc-shaped plate 1, the first screw holes 5 of the two fixing rings are arranged in a vertically corresponding and close fit manner, the connecting screw 6 is in threaded fit with the first screw hole 5, the connecting screw 6 is screwed into the first screw hole 5 to fix the two arc-shaped plates 1 into a whole fixing ring, the end surfaces of the end parts of the two arc-shaped plates 1 are arranged in a vertically close fit manner, the two arc-shaped plates 1 are not on the same horizontal plane, the height of the fixing block 3 can be set so that the evenly arranged studs 301 are in the same horizontal plane, when carrying out the terminal fixed for the terminal atress is even, prevents to take place unexpected when fastening or dismantling.
Example 2
This embodiment is further extended from the above-mentioned embodiments, and as shown in fig. 5 and fig. 6, the embodiment includes a detaching device, which is installed on the top surface of the fixing ring, and the detaching device can conveniently detach the fixed bolt.
Wherein, the dismounting device comprises a telescopic rod 8 arranged on the upper fixing ring and the lower fixing ring, the telescopic rod 8 is vertically arranged, the end part of the lifting platform is detachably connected with a lifting platform 7, it should be noted that the telescopic rod 8 plays a role in supporting the lifting platform 7, the lifting platform 7 is driven by the telescopic rod 8 to move up and down, the shape of the lifting platform 7 is not limited to that shown in figure 5, a motor 701 is detachably mounted on the lifting platform 7, the rotating shaft of the motor 701 is arranged downwards, a connecting column 702 is fixedly connected on the rotating shaft, a second screw hole 703 is arranged at the bottom of the connecting column 702, a fixing screw 704 is in threaded fit with the second screw hole 703, a detaching sleeve 705 is arranged at the bottom of the fixing screw 704, and it should be noted that the connecting column 702 plays a role of connecting the motor 701 and the fixing screw 704, and then drive when motor 701 rotates and dismantle sleeve 705 and rotate, dismantle sleeve 705 bottom have with the nut assorted recess that needs the fastening to dismantle.
As shown in fig. 6, it should be further noted that the detaching sleeve 705 and the fixing screw 704 can be detachably connected, so as to facilitate the replacement of the detaching sleeve 705 with different models to adapt to different nuts.
It should be noted that the fixed screw 704 and the detachable sleeve 705 are limited in rotation, so that the detachable sleeve 705 can be adjusted conveniently to allow the nut on the bolt to enter the groove to fix the bolt.
As shown in fig. 4, in the actual work process, can set up on solid fixed ring's top surface with 8 assorted mounting grooves 4 of telescopic link, with the bottom of telescopic link 8 set up in mounting groove 4 with solid fixed ring detachable connects, mounting groove 4's effect is for telescopic link 8 provides detachable mounting's position, can copy the mode of installation and can be for screw-thread fit or buckle link etc. during the operation, dismantle sleeve 705 should just put with solid fixed ring down's central point.
As shown in fig. 2, as another scheme expansion of this embodiment, demountable installation dummy block 2 can be on the bottom surface of arc 1, and dummy block 2 is the rubber material, and when whole device was fixed on the terminal, dummy block 2 can play the guard action to the terminal, prevents that solid fixed ring from damaging the terminal, and the extrusion is taken your radian and is the same with the interior radian of arc 1.
Example 3
This embodiment is further extended from the above embodiments 1 and 2, as shown in fig. 3, a rotation handle 302 may be detachably mounted on an outer end portion of the stud 301, and the rotation handle 302 may facilitate screwing in and screwing out the stud 301.
It should be noted that the shape of the rotating handle 302 is not limited by fig. 2,
as shown in fig. 3, as a technical development of this embodiment, a pressing block 303 may be installed at an inner end portion of the stud 301, the terminal may be well fixed by the pressing block 303 during operation, the pressing block 303 may be made of a nylon material, which can effectively protect threads on the terminal from being damaged, increase friction, and compress the terminal more effectively.
As shown in fig. 7, as another technical development of this embodiment, a spring 304 is fixedly connected between the pressing piece 303 and the end of the stud 301, one end of the spring 304 is connected to the end of the stud 301, and the other end is connected to the end of the pressing piece 303, so that the spring 304 can play a role of buffering when being fixed.
The application method of the scheme is as follows:
the operator will fix the ring and overlap on the terminal, precession stud 301 through rotatory handle 302, make briquetting 303 will need the bolt fastening of fastening dismantlement to be fixed, all fixing device must even fixing bolt, then start telescopic link 8 and drive dismantlement sleeve 705 downwards, because it is connected for spacing rotation with clamping screw 704 is direct to dismantle sleeve 705, can make the nut that needs to dismantle on the bolt get into and dismantle sleeve 705, the rotatory nut phase-match of dismantling sleeve 705 and needs dismantlement of starter motor 701, only do not influence the bolt for the screw-out is cut, the fixed mode of nut is the same reason.
In the present invention, the terms "upper", "lower", "left", "right", "middle", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
At present, the technical scheme of the invention has been subjected to a pilot plant test, namely a small-scale experiment before large-scale mass production of products; after the pilot test is finished, the investigation for the use of the user is carried out in a small range, and the investigation result shows that the satisfaction degree of the user is higher; the preparation of products for formal production for industrialization (including intellectual property risk early warning investigation) is now started.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The multifunctional bolt fastening detacher is characterized by comprising a fixing ring and fixing devices arranged on the fixing ring, wherein the fixing devices are uniformly arranged on the top surface of the fixing ring;
the fixing device comprises a fixing block (3) arranged on the upper fixing ring or the top surface of the fixing ring and a stud (301) in threaded fit with the fixing block (3);
the fixed ring is in a ring shape.
2. The multifunctional bolt fastening detacher as recited in claim 1, characterized in that the fixing ring is formed by connecting two arc-shaped plates (1) end correspondingly to form a circular ring shape.
3. The multifunctional bolt fastening detacher of claim 2, further comprising a connecting device, wherein the connecting device comprises a first screw hole (5) and a connecting screw (6), the first screw hole (5) is arranged on the end surface of the upper end of the arc-shaped plate (1), the first screw holes (5) on the two arc-shaped plates (1) are correspondingly and closely attached up and down, and the connecting screw (6) is in threaded fit with the first screw hole (5).
4. The multifunctional bolt fastening detacher of claim 1, further comprising a detaching device, wherein the detaching device comprises telescopic rods (8) symmetrically arranged on the fixing ring, a lifting table (7) connected with the end of the telescopic rod (8), a motor (701) arranged on the lifting table (7), a connecting column (702) fixedly connected with a rotating shaft of the motor (701), a second screw hole (703) arranged at the bottom of the connecting column (702), a fixing stud (704) in threaded fit with the second screw hole (703), and a detaching sleeve (705) arranged at the bottom of the fixing stud (704);
the connecting column (702) is arranged on the lower side of the lifting platform (7), and the dismounting sleeve (705) is over against the central position of the fixing ring.
5. The multifunctional bolt-tightening detacher of claim 4, characterized in that the fixing stud (704) is in limited rotational connection with the detaching sleeve (705).
6. A multifunctional bolt-tightening detacher as recited in claim 5, characterized in that the outer end of the stud (301) is provided with a rotating handle (302).
7. A multi-functional bolt-fastening detacher as claimed in claim 6, characterised in that the inner end of the stud (301) is provided with a pressing piece (303).
8. The multifunctional bolt-fastening detacher as recited in claim 4, characterized in that the top surface of the fixing ring is provided with a mounting groove (4), and the bottom of the telescopic rod (8) is detachably connected with the fixing ring in the mounting groove (4).
9. A multifunctional bolt-fastening detacher as recited in claim 7, characterized in that a spring (304) is provided between the pressing block (303) and the stud (301), one end of the spring (304) is connected with the inner end of the stud (301), and the other end is connected with the end of the pressing block (303).
10. The multifunctional bolt fastening detacher as recited in claim 2, characterized in that a squeezing pad (2) is arranged on the bottom surface of the arc plate (1), and the inner arc degree of the squeezing pad (2) is the same as that of the arc plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210561761.9A CN114918877A (en) | 2022-05-23 | 2022-05-23 | Multifunctional bolt fastening and dismounting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210561761.9A CN114918877A (en) | 2022-05-23 | 2022-05-23 | Multifunctional bolt fastening and dismounting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114918877A true CN114918877A (en) | 2022-08-19 |
Family
ID=82810705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210561761.9A Pending CN114918877A (en) | 2022-05-23 | 2022-05-23 | Multifunctional bolt fastening and dismounting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114918877A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05305405A (en) * | 1992-04-30 | 1993-11-19 | Nippon Steel Corp | Attaching/detaching tool for cooling spray tip for continuous casting equipment |
| CN203542450U (en) * | 2013-11-18 | 2014-04-16 | 广州飞机维修工程有限公司 | Clamping and locating device for dismounting and mounting aircraft pneumatic starter rotor |
| CN208163535U (en) * | 2018-05-12 | 2018-11-30 | 缙云县南瓯堂企业管理咨询有限公司 | A kind of Liftable type auto repair nut dismounting tool |
| CN110614609A (en) * | 2019-10-09 | 2019-12-27 | 国网河北省电力有限公司邱县供电分公司 | Bolt fastener |
| CN210878489U (en) * | 2019-11-21 | 2020-06-30 | 梁国栋 | Drilling equipment bolt dismounting device |
| CN211439747U (en) * | 2019-12-25 | 2020-09-08 | 广州昇迅科技发展有限公司 | Adjustable bolt tightening device for elevator installation |
| CN213673923U (en) * | 2020-10-26 | 2021-07-13 | 招远市乾宇矿机配件有限公司 | Automatic nut dismounting tool for mining mechanical equipment |
| CN215548389U (en) * | 2021-09-18 | 2022-01-18 | 陈鹏 | Laborsaving dismounting device of bolt for drilling equipment |
| CN216299135U (en) * | 2021-10-29 | 2022-04-15 | 胡丹 | Portable automobile tire bolt dismounting device |
-
2022
- 2022-05-23 CN CN202210561761.9A patent/CN114918877A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05305405A (en) * | 1992-04-30 | 1993-11-19 | Nippon Steel Corp | Attaching/detaching tool for cooling spray tip for continuous casting equipment |
| CN203542450U (en) * | 2013-11-18 | 2014-04-16 | 广州飞机维修工程有限公司 | Clamping and locating device for dismounting and mounting aircraft pneumatic starter rotor |
| CN208163535U (en) * | 2018-05-12 | 2018-11-30 | 缙云县南瓯堂企业管理咨询有限公司 | A kind of Liftable type auto repair nut dismounting tool |
| CN110614609A (en) * | 2019-10-09 | 2019-12-27 | 国网河北省电力有限公司邱县供电分公司 | Bolt fastener |
| CN210878489U (en) * | 2019-11-21 | 2020-06-30 | 梁国栋 | Drilling equipment bolt dismounting device |
| CN211439747U (en) * | 2019-12-25 | 2020-09-08 | 广州昇迅科技发展有限公司 | Adjustable bolt tightening device for elevator installation |
| CN213673923U (en) * | 2020-10-26 | 2021-07-13 | 招远市乾宇矿机配件有限公司 | Automatic nut dismounting tool for mining mechanical equipment |
| CN215548389U (en) * | 2021-09-18 | 2022-01-18 | 陈鹏 | Laborsaving dismounting device of bolt for drilling equipment |
| CN216299135U (en) * | 2021-10-29 | 2022-04-15 | 胡丹 | Portable automobile tire bolt dismounting device |
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