CN110576412A - Bracket and use method - Google Patents

Bracket and use method Download PDF

Info

Publication number
CN110576412A
CN110576412A CN201911002379.9A CN201911002379A CN110576412A CN 110576412 A CN110576412 A CN 110576412A CN 201911002379 A CN201911002379 A CN 201911002379A CN 110576412 A CN110576412 A CN 110576412A
Authority
CN
China
Prior art keywords
guide
bolt
bracket
stretcher
piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911002379.9A
Other languages
Chinese (zh)
Inventor
崔俊峰
徐智杰
丁佐
乔英志
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.)
China Shipbuilding Power Engineering Institute Co Ltd
Original Assignee
China Shipbuilding Power Engineering Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Shipbuilding Power Engineering Institute Co Ltd filed Critical China Shipbuilding Power Engineering Institute Co Ltd
Priority to CN201911002379.9A priority Critical patent/CN110576412A/en
Publication of CN110576412A publication Critical patent/CN110576412A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Abstract

The invention belongs to the technical field of brackets, and particularly discloses a bracket for supporting a bolt hydraulic stretcher, which comprises a supporting piece, a driving mechanism and a guide piece, wherein the driving mechanism is arranged below the supporting piece, one end of the guide piece penetrates through the supporting piece to be abutted against or fixedly connected with the driving mechanism, the other end of the guide piece is provided with an external thread, the guide piece is provided with a first position and a second position in the driving direction of the driving mechanism, when the guide piece is positioned at the first position, the other end of the guide piece can be provided with the bolt hydraulic stretcher and a locking nut, and when the guide piece is positioned at the second position, the bolt hydraulic stretcher and the locking nut can be screwed into a bolt to be pre-tightened. The invention also discloses a use method of the bracket, which is applied to the bracket. The bracket and the using method disclosed by the invention have the advantages that manual support is not needed when the bolt hydraulic stretcher pre-tensions the inverted bolt, the operation is simple, and the use is safe.

Description

Bracket and use method
Technical Field
The invention relates to the technical field of brackets, in particular to a bracket for a hydraulic stretcher for a supporting bolt and a using method of the bracket.
Background
The bolt hydraulic stretcher makes the stretched bolt stretched in the elastic deformation area by means of the hydraulic source provided by the hydraulic pump, and the length of the bolt is slightly deformed, so that the nut is easy to loosen. The stretcher is a safe, efficient and quick tool, is an optimal way for fastening and disassembling bolts of various specifications, and is widely applied to occasions with high strength, large size and high pretightening force or strict pretightening force requirements.
The working property of the bolt hydraulic stretcher determines that the weight of the bolt hydraulic stretcher is generally heavier, namely dozens of kilograms when the bolt hydraulic stretcher is light, and hundreds of kilograms when the bolt hydraulic stretcher is heavy. Before the bolt is stretched by the stretcher, the stretcher is firstly connected with the working bolt in a threaded mode, the bolt with the upward or lateral bolt direction is not difficult to install, but the hydraulic bolt hydraulic stretcher is difficult to disassemble and assemble due to the fact that the hydraulic bolt hydraulic stretcher is heavy in weight. Because the bolt is down, the hydraulic stretching ware needs many people to cooperate according to traditional mounting method, and bare-handed hydraulic stretching ware lifts up, and tensile nut and working bolt centering to with the stretcher precession bolt, this kind of method rotatory stretcher is very difficult, and dismouting personnel station is crowded simultaneously, can not support too long time, and the dismouting process can cause serious physical demands. Sometimes, the situation that the dismounting personnel cannot insist on supporting the weight of the dismounting personnel to cause dismounting failure or even cause injury by smashing of the personnel occurs, time and labor are wasted, and the operational safety risk is high.
Therefore, a bracket which is simple and safe to operate is required for mounting the hydraulic tensioner for the inverted large bolt.
Disclosure of Invention
the invention aims to provide a bracket, so that manual support is not needed when a bolt hydraulic tensioner is used for pre-tightening an inverted bolt, the operation is simple, and the use is safe.
The invention also aims to provide a bracket using method, which simplifies the operation process of pre-tightening the inverted bolt by the bolt hydraulic stretcher and improves the operation safety and the working efficiency of the bolt hydraulic stretcher.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
A bracket for a bolt hydraulic tensioner, comprising: a support member; the driving mechanism is arranged below the supporting piece; the guide piece, guide piece one end is passed support piece butt or rigid coupling in actuating mechanism, the other end is provided with the external screw thread on actuating mechanism's the direction of drive, the guide piece has primary importance and second position, works as the guide piece is located during the primary importance, the guide piece the other end can be installed bolt hydraulic pressure stretcher and lock nut, works as the guide piece is located during the second place, bolt hydraulic pressure stretcher with lock nut can preced on treating the pretension bolt.
Further, the guide and the bolt to be pretensioned are coaxial in the driving direction of the drive mechanism.
further, when the guide piece is located at the second position, a preset distance is reserved between the other end of the guide piece and the bolt to be pre-tightened.
Further, the preset distance is a thread pitch value of the external thread.
Furthermore, a through hole is formed in the support piece, and the guide piece penetrates through the through hole and can slide relative to the support piece.
Furthermore, the support piece comprises a body and a fixing piece, the body is provided with an installation position capable of installing the fixing piece, the fixing piece is provided with the penetrating holes, and the guide piece penetrates through the penetrating holes.
Furthermore, the fixing part is provided with a plurality of fixing parts, the sizes of the through holes of the fixing part are different, and the guide part is arranged in one of the through holes in a penetrating mode.
Further, the guide piece is of a hollow structure.
A bracket using method is applied to the bracket.
Further, the bracket using method comprises the following steps:
Placing the bracket below the bolt to be pre-tightened;
the driving mechanism drives the guide piece to be located at the first position, and the bolt hydraulic stretcher and the locking nut are sequentially screwed into one end, provided with the external thread, of the guide piece;
And the driving mechanism drives the guide piece to move to the second position, and the locking nut and the bolt hydraulic stretcher are sequentially screwed into the bolt to be pre-tightened.
The invention has the beneficial effects that:
According to the bracket provided by the invention, the guide piece is arranged on the support piece in a penetrating way and is abutted or fixedly connected with the driving mechanism, when the guide piece is positioned at the first position, the bolt hydraulic stretcher and the locking nut are sequentially screwed into one end with the external thread on the guide piece, and when the guide piece is positioned at the second position under the driving of the driving mechanism, the locking nut and the bolt hydraulic stretcher can be sequentially screwed into the bolt to be pre-tightened. The bracket reduces the workload of manual operation, and is simple, convenient and safe to operate.
the use method of the bracket provided by the invention is applied to the bracket, simplifies the operation process of pre-tightening the inverted bolt by the bolt hydraulic stretcher, and improves the operation safety and the working efficiency of the bolt hydraulic stretcher.
Drawings
FIG. 1 is a first schematic diagram of the working process of the bracket provided by the present invention;
FIG. 2 is a second schematic diagram of the working process of the bracket provided by the present invention;
FIG. 3 is a schematic structural view of a support provided by the present invention;
Fig. 4 is a schematic structural diagram of the fixing member provided by the present invention.
In the figure:
20. pre-tightening the bolt; 30. locking the nut;
1. A support member; 11. a body; 111. mounting holes; 12. a fixing member; 121. perforating holes; 122. mounting a plate; 123. a sliding sleeve;
2. A drive mechanism; 3. a guide member.
Detailed Description
in order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
the technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
the bolt hydraulic stretcher is a safe and efficient dismounting tool for fastening and dismounting bolts of various specifications, and is widely applied to large-scale bolt fastening or dismounting occasions with high strength, large size and strict requirements on large pretightening force or pretightening force.
The weight of the bolt hydraulic stretcher is generally heavier due to the working property of the bolt hydraulic stretcher, the bolt hydraulic stretcher is in threaded connection with a working bolt before the stretcher is used for stretching the bolt, a hoisting tool can be used for mounting the bolt in an upward or lateral direction, but the hydraulic stretcher needs to be matched by multiple persons for the bolt in the downward direction, the hydraulic stretcher is lifted by bare hands, a locking nut is centered with the working bolt, and the stretcher is screwed into the working bolt.
in order to solve the above problems, as shown in fig. 1 and 2, the present embodiment provides a bracket for a strut bolt hydraulic tensioner, which includes a support member 1, a driving mechanism 2, and a guide member 3. It is noted that the structure of the bolt hydraulic tensioner is not shown in both fig. 1 and 2. Wherein actuating mechanism 2 sets up in support piece 1's below, and 3 one ends of guide pass support piece 1 butt or rigid coupling in actuating mechanism 2, and the other end is provided with the external screw thread. In the driving direction of the driving mechanism 2, the guide 3 has a first position and a second position, and when the guide 3 is located at the first position, the other end (the end provided with the external thread) of the guide 3 can mount the bolt hydraulic stretcher and the lock nut 30, and when the guide 3 is located at the second position, the bolt hydraulic stretcher and the lock nut 30 can be screwed into the bolt 20 to be pretensioned. The drive mechanism 2 is capable of driving the guide 3 to reciprocate between the first position and the second position.
in this embodiment, the guide 3 is arranged on the support 1 in a penetrating manner and is abutted against the driving mechanism 2, when the guide 3 is located at the first position, the bolt hydraulic stretcher and the lock nut 30 are sequentially screwed into one end of the guide 3 with the external thread, and when the guide 3 is located at the second position under the driving of the driving mechanism 2, the lock nut 30 and the bolt hydraulic stretcher can be sequentially screwed into the bolt 20 to be pre-tightened. The bracket reduces the workload of manual operation, and has simple structure and simple, convenient and safe operation.
Alternatively, in order to achieve a stable support of the guide 3, the support 1 is preferably a square table structure, which may be made of wood or steel. In other embodiments, the support 1 may also be a round table or tripod structure. The specific structural form or material of the supporting member 1 needs to be determined according to the supporting requirement of the guiding member 3, and the embodiment is not particularly limited.
In order to improve the flexibility of carrying and using the pallet, the driving mechanism 2 is preferably provided separately from the support member 1, and when used, the driving mechanism 2 is only required to be provided below the support member 1. In other embodiments, the driving mechanism 2 may be integrated with the supporting member 1 to increase the integration of the bracket. The driving mechanism 2 is preferably a hydraulic jack, so that the design and manufacturing cost of the bracket is saved, and meanwhile, the hydraulic jack with the corresponding specification can be selected according to different working conditions. Of course, the driving mechanism 2 may also be a motor or an electric push rod structure, and the driving mechanism 2 capable of realizing linear driving is a conventional technical means in the field, and is not described in detail in this embodiment.
When the guide 3 is in the second position, as shown in fig. 2, the guide 3 and the bolt 20 to be pretensioned are coaxial in the driving direction of the drive mechanism 2, so that it is possible to screw the bolt hydraulic tensioner and the union nut 30 into the bolt 20 to be pretensioned.
It is to be noted that when the guide 3 is in the second position, there is a predetermined distance between the end of the guide 3 having the external thread and the inverted bolt 20 to be pretensioned, which is preferably the pitch value of the external thread, so that the union nut 30 and the bolt hydraulic tensioner are screwed into the bolt 20 to be pretensioned in turn. When the preset distance value is too small or one end of the guide member 3 with the external thread abuts against the inverted bolt 20 to be pre-tightened, the locking nut 30 may be jammed when the bolt 20 to be pre-tightened is screwed in from the guide member 3; when the preset distance is too large, the lock nut 30 may be detached from the bolt 20 to be pretensioned when the bolt 20 to be pretensioned is screwed into the guide 3, increasing the difficulty in handling the bracket.
to increase the stability of the support 1 and reduce the overall weight of the bracket, the guide 3 is preferably a hollow cylindrical structure in this embodiment. The thickness of the cylinder wall of the guide 3 is determined according to the weight of the bolt hydraulic tensioner, and the embodiment is not particularly limited.
as shown in fig. 1 to 4, the supporting member 1 includes a body 11 and fixing members 12, the body 11 is provided with an installation position capable of installing the fixing members 12, specifically, the installation position includes a plurality of installation holes 111, each fixing member 12 is detachably installed in one of the installation holes 111, each fixing member 12 is provided with a through hole 121, the through holes 121 of the fixing members 12 are different in size, and the guiding member 3 is inserted into one of the through holes 121 and can move in the driving direction of the driving mechanism 2 relative to the corresponding fixing member 12. During the actual use of the bracket, the number and the size of the corresponding guide members 3 and the fixing members 12 are selected according to the number and the size of the bolts 20 to be pre-tightened. Different types of guide parts 3 and fixing parts 12 are selected according to different bolts 20 to be pre-tightened, so that the universality and flexibility of the bracket are improved, and the application range of the bracket is expanded.
in the present embodiment, the number of the mounting holes 111 is the same as that of the fixing elements 12, and the fixing elements 12 correspond to each other one by one, specifically, five mounting holes 111 are distributed on the body 11 of the support 1, correspondingly, five fixing elements 12 are also provided, and each fixing element 12 is detachably mounted in one of the mounting holes 111. For clarity of the operation of the bracket, only one fixing element 12 is shown in fig. 1 and 2. In other embodiments, the number and arrangement of the mounting holes 111 may be determined according to the number and arrangement of the bolts 20 to be pretensioned, and the embodiment is not particularly limited.
Specifically, the mounting hole 111 of the body 11 of the support member 1 is preferably a square stepped hole, and the fixing member 12 provided in the mounting hole 111 is correspondingly provided with a mounting plate 122 having a stepped structure that can be engaged with a stepped surface of the square stepped hole, as shown in fig. 3 and 4. The square stepped hole can limit the relative rotation between the body 11 and the guide 3, and the stability of the bracket is improved.
in other embodiments, the mounting hole 111 of the supporting member 1 may also be a circular or polygonal structure, the mounting plate 122 of the fixing member 12 is correspondingly configured to be a circular or polygonal structure, and the fixing member 12 and the mounting hole 111 may be clamped or bolted. The specific matching structure and fixing form of the fixing member 12 and the mounting hole 111 only need to realize stable support of the guide member 3.
Further, in order to improve the stable support of the fixing member 12 to the guide member 3, a sliding sleeve 123 communicating with the through hole 121 is further disposed on the mounting plate 122 of the guide member 3, and the guide member 3 slides up and down along the sliding sleeve 123 under the driving of the driving mechanism 2 so that the guide member 3 is switched between the first position and the second position. The specific structure and/or size of the sliding sleeve 123 is determined according to the size of the guide 3, and the embodiment is not particularly limited.
For easy understanding, the present embodiment also provides a method of using a bracket applied to the above bracket, the method including:
Placing a support piece 1 below a bolt 20 to be pre-tightened, placing a driving mechanism 2 below the support piece 1, and finally enabling one end of a guide piece 3 to penetrate through a through hole 121 in the support piece 1 and abut against or be fixedly connected with the driving mechanism 2;
Controlling the driving mechanism 2 to drive the guide part 3 to be positioned at a first position, and sequentially screwing the bolt hydraulic stretcher and the locking nut 30 into one end with external threads on the guide part 3;
And finally, controlling the driving mechanism 2 to drive the guide part 3 to move to a second position, wherein the distance between one end of the guide part 3 with the external thread structure and the bolt 20 to be pre-tightened is a thread pitch value of the external thread, and sequentially screwing the locking nut 30 and the bolt hydraulic stretcher into the bolt 20 to be pre-tightened.
In this embodiment, through using this bracket for need not artifical the support when the bolt hydraulic stretching ware dismouting bolt of inversion, easy operation, it is safe in utilization.
it should be noted that, in the actual use process, when the lock nut 30 and the bolt hydraulic stretcher are screwed into the position to be pre-tightened on the bolt 20 to be pre-tightened in sequence, the pre-tightening operation of the bolt 20 to be pre-tightened is completed according to the conventional operation method of the bolt hydraulic stretcher. And then screwing the bolt hydraulic stretcher into the guide piece 3, controlling the driving mechanism 2 to drive the guide piece 3 to return to the first position, screwing the bolt hydraulic stretcher out of the guide piece 3, and finishing the pre-tightening operation of the inverted bolt 20 to be pre-tightened.
in other embodiments, the bracket may also be used for disassembling the locknut 30 on the inverted bolt, and the process is the same as the pre-tightening process of the bolt 20 to be pre-tightened, which is not described in detail in this embodiment.
the foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A bracket for bracing a bolt hydraulic tensioner, comprising:
A support (1);
A drive mechanism (2) disposed below the support member (1);
Guide (3), the one end of guide (3) is passed support piece (1) butt or rigid coupling in actuating mechanism (2), the other end of guide (3) is provided with the external screw thread on actuating mechanism's (2) the direction of drive, guide (3) have primary importance and second place, work as guide (3) are located during the primary importance, guide (3) the other end can be installed bolt hydraulic pressure stretcher and lock nut (30), work as guide (3) are located during the second place, bolt hydraulic pressure stretcher with lock nut (30) can be screwed into on treating pretension bolt (20).
2. A carriage in accordance with claim 1, characterized in that the guide (3) and the bolt (20) to be pretensioned are coaxial in the driving direction of the drive mechanism (2).
3. A carriage in accordance with claim 1, characterized in that the other end of the guide (3) has a predetermined distance from the bolt (20) to be pretensioned when the guide (3) is in the second position.
4. The bracket of claim 3, wherein the predetermined spacing is a pitch value of the external threads.
5. a carriage in accordance with claim 1, characterized in that said support (1) is provided with a through hole (121), said guide (3) being inserted in said through hole (121) and being able to slide with respect to said support (1).
6. a carriage in accordance with claim 5, characterized in that said supporting member (1) comprises a body (11) and a fixing member (12), said body (11) is provided with an installation position for installing said fixing member (12), said fixing member (12) is provided with said through holes (121), said guiding member (3) is arranged in said through holes (121).
7. A carriage in accordance with claim 6, characterized in that said fixing element (12) is provided in a plurality, said through holes (121) of said fixing element (12) being of different sizes, said guide element (3) being inserted in one of said through holes (121).
8. A carriage in accordance with claim 1, characterized in that the guide (3) is of hollow construction.
9. A method of using a pallet, characterized by being applied to a pallet according to any of claims 1-8.
10. A method of using a pallet as claimed in claim 9, characterised in that the method of using a pallet comprises the steps of:
Placing the bracket below the bolt (20) to be pretensioned;
The driving mechanism (2) drives the guide piece (3) to be located at the first position, and the bolt hydraulic stretcher and the locking nut (30) are sequentially screwed into one end, provided with the external thread, of the guide piece (3);
The driving mechanism (2) drives the guide piece (3) to move to the second position, and the locking nut (30) and the bolt hydraulic stretcher are sequentially screwed into the bolt (20) to be pre-tightened.
CN201911002379.9A 2019-10-21 2019-10-21 Bracket and use method Pending CN110576412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911002379.9A CN110576412A (en) 2019-10-21 2019-10-21 Bracket and use method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911002379.9A CN110576412A (en) 2019-10-21 2019-10-21 Bracket and use method

Publications (1)

Publication Number Publication Date
CN110576412A true CN110576412A (en) 2019-12-17

Family

ID=68815217

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911002379.9A Pending CN110576412A (en) 2019-10-21 2019-10-21 Bracket and use method

Country Status (1)

Country Link
CN (1) CN110576412A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113524116A (en) * 2021-08-19 2021-10-22 上海康恒环境股份有限公司 Hydraulic cylinder extracting tool
CN113972803A (en) * 2021-10-20 2022-01-25 重庆迎洲压铸有限公司 Wind power motor mounting system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204772371U (en) * 2015-07-15 2015-11-18 中国水利水电第五工程局有限公司 Screw rod elongator dismouting device
CN108747961A (en) * 2018-07-24 2018-11-06 顺德职业技术学院 A kind of attaching/detaching apparatus and assembly and disassembly methods of shafting components
CN210909810U (en) * 2019-10-21 2020-07-03 中船动力研究院有限公司 Bracket

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204772371U (en) * 2015-07-15 2015-11-18 中国水利水电第五工程局有限公司 Screw rod elongator dismouting device
CN108747961A (en) * 2018-07-24 2018-11-06 顺德职业技术学院 A kind of attaching/detaching apparatus and assembly and disassembly methods of shafting components
CN210909810U (en) * 2019-10-21 2020-07-03 中船动力研究院有限公司 Bracket

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113524116A (en) * 2021-08-19 2021-10-22 上海康恒环境股份有限公司 Hydraulic cylinder extracting tool
CN113972803A (en) * 2021-10-20 2022-01-25 重庆迎洲压铸有限公司 Wind power motor mounting system
CN113972803B (en) * 2021-10-20 2023-12-05 重庆迎洲压铸有限公司 Wind-powered electricity generation motor installing the system

Similar Documents

Publication Publication Date Title
CN110576412A (en) Bracket and use method
CN111519937B (en) Support system for installing prefabricated building and construction method thereof
CN210909810U (en) Bracket
WO2023045194A1 (en) Pin shaft disassembly and assembly apparatus, frame connecting structure, and work machine
CN206445748U (en) One kind draws code instrument
CN210307643U (en) Bolt fastening device suitable for narrow space
CN211103821U (en) Hydraulic wrench lifting device
CN107354927B (en) A kind of assembly tooling of hydraulic bolt lifting device, assembly method and hydraulic bolt lifting device
CN221435599U (en) Hydraulic stretcher auxiliary device suitable for dismounting and mounting large-sized nut
CN218284267U (en) Steel structure connecting device for steel structure engineering
CN221821649U (en) Hoisting device
CN217604387U (en) Efficient energy-saving electromagnetic heating pry device
CN220621009U (en) Overhanging I-steel connecting piece
CN112743488B (en) Automatic dismounting method and device for nut on lower end face of circular flange of nuclear power plant
CN218503812U (en) Screw screwing jig for rear controller
CN214003799U (en) Hoisting device for chemical tower
CN218946841U (en) Shaft sleeve assembling device
CN110182274B (en) Fixing device for motor for controlling lifting of screw rod
CN218201960U (en) Servo electric cylinder
CN221343688U (en) Hoisting device for toughened glass transportation
CN219753030U (en) Auxiliary safety device for hanging basket steel suspender
CN115126272B (en) Clamp type safety rope fixing support
CN220684422U (en) Lifting tool for removing blocking valve holding plate
CN215202654U (en) Pile sharing equipment
CN211195735U (en) New energy vehicle maintenance equipment

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