CN115179027A - Large hydraulic stretcher moving integrated platform and use method - Google Patents
Large hydraulic stretcher moving integrated platform and use method Download PDFInfo
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- CN115179027A CN115179027A CN202210842871.2A CN202210842871A CN115179027A CN 115179027 A CN115179027 A CN 115179027A CN 202210842871 A CN202210842871 A CN 202210842871A CN 115179027 A CN115179027 A CN 115179027A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
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Abstract
The invention relates to a large hydraulic stretcher moving integrated platform and a using method thereof, wherein the platform comprises a moving integrated platform body, the moving integrated platform body is supported by a supporting device, the inside of the moving integrated platform body is connected with a hydraulic stretcher through a lifting device, and a combined hydraulic pump station is arranged in the moving integrated platform body; the lifting device comprises a screw rod vertically and rotatably arranged in the movable integrated platform body and a hand wheel connected to the top of the screw rod, and the top of the hydraulic stretcher is fixedly connected with a support; the inner wall of the movable integrated platform body is connected with the two limiting plates, the outer wall of the hydraulic stretcher is provided with the positioning plate, and the positioning plate is limited between the two limiting plates. The hydraulic stretching scheme of the main shaft bolt of the hydraulic generator is simplified, the labor intensity of field workers can be greatly reduced, the bolt stretching work efficiency is improved, the important part bolt stretching work can be completed quickly, safely, in a time-saving and labor-saving manner, and the safety of equipment and personnel is effectively guaranteed.
Description
Technical Field
The invention belongs to the technical field of equipment installation, and relates to a large hydraulic stretcher moving integrated platform and a using method thereof.
Background
In the process of assembling and disassembling bolts at important parts such as the connection of main shafts of large and medium hydropower station hydroelectric generating sets at home and abroad, a hydraulic stretcher is generally used, the hydraulic stretcher is a globally advanced bolt pre-tightening and disassembling tool, the hydraulic bolt stretcher is widely used for pre-tightening large-diameter bolts due to the advantages of simple product operation, convenient use, high safety and the like, and the size and the weight of the large hydraulic stretcher are increased along with the continuous increase of the sizes of the bolts.
At present, the hydraulic stretching ware that large-scale bolt was used mainly realizes transferring, installation, dismantlement etc. work through the manual work, has a great deal of safety risk and hidden danger in this type of work:
1. the heavy hydraulic stretcher needs to be moved by manually lifting shoulders, so that the manual labor intensity is high;
2. in the carrying process, the hydraulic stretcher has the hidden dangers of slipping and the like, and the safety of personnel and equipment cannot be thoroughly guaranteed;
3. the hydraulic stretcher generally needs to be provided with a movable pump station and needs special personnel to take charge, and the bolts stretch field operators, so that the waste of human resources is caused;
4. the large-scale hydraulic stretcher corollary equipment is many, and there is mixed and disorderly in the equipment placement, influences the whole pleasing to the eye of storage, and dismantles splitter at every turn, is unfavorable for next quick combination use etc. and the removal and the transition of large-scale hydraulic stretcher provide serious examination to personnel and important equipment facility.
Disclosure of Invention
In order to solve the above-mentioned safety risk and hidden danger that face, this patent aims at providing a large-scale hydraulic stretcher removes integrated platform to realize that large-scale hydraulic stretcher removes, uses, the integration function of storage, thoroughly solve the hydraulic pressure tensile elasticity work of different occasions, different model size bolts, make field personnel and equipment safety can guarantee.
In order to achieve the above purpose, the invention provides the following technical scheme: a large hydraulic stretcher moving integrated platform comprises a moving integrated platform body, wherein the moving integrated platform body is supported by a supporting device, a hydraulic stretcher is connected to the inside of the moving integrated platform body through a lifting device, and a combined hydraulic pump station which is matched with the hydraulic stretcher to work is installed in the moving integrated platform body; wherein, the first and the second end of the pipe are connected with each other,
the lifting device comprises a screw rod vertically and rotatably arranged in the movable integrated platform body and a hand wheel fixedly connected to the top of the screw rod, the top of the hydraulic stretcher is fixedly connected with a support, and the screw rod is in threaded connection with the support;
the inner wall of the movable integrated platform body is connected with two limiting plates, the outer wall of the hydraulic stretcher is provided with a positioning plate, and the positioning plate is limited between the two limiting plates.
Preferably, the supporting device comprises a group of fixed supporting legs and a group of telescopic supporting legs, the fixed supporting legs and the telescopic supporting legs are connected with the mobile integrated platform body, and lockable universal wheels are mounted at the bottoms of the fixed supporting legs and the telescopic supporting legs.
Preferably, the telescopic supporting legs comprise hollow rods fixedly connected with the mobile integrated platform body, movable rods are movably mounted in the hollow rods, sliding grooves used for adjusting the connection positions of the bolts are formed in the hollow rods and the movable rods, and the hollow rods are connected with the movable rods through bolts.
Preferably, the bottom of the hydraulic stretcher is detachably connected with the supporting seat, the side wall of the supporting seat is provided with an adjusting window and a bolt hole for installing a lifting rod, and the lifting rod is connected between the supporting seat and the hydraulic stretcher.
Preferably, the screw is a trapezoidal screw.
Preferably, the combined hydraulic pump station is controlled by a control button, and a quick connector at the outlet of the combined hydraulic pump station is connected with a quick connector at the end part of the hydraulic stretcher through a hose.
Preferably, the screw rod is connected with the movable integrated platform body through a thrust bearing and connected with the support through a support threaded sleeve.
Preferably, the mobile integrated platform body is connected with the handrail.
The invention also provides a use method of the large hydraulic stretcher mobile integrated platform, which comprises the following steps:
s1, adjusting the height of a telescopic leg of a mobile integrated platform, lifting the telescopic leg to the upper part of a rotor central body and placing the telescopic leg on an upper end shaft and the rotor central body;
s2, connecting the combined hydraulic pump station with a hydraulic stretcher through a hydraulic hose, finely adjusting the position of the movable integrated platform to enable the position to be opposite to the top of the connecting bolt, and operating a hand wheel to enable the hydraulic stretcher to integrally descend;
s3, when the support seat of the hydraulic stretcher descends to the plane of the upper end shaft, the lifting rod is removed, the hydraulic stretcher is separated from the support seat, and the combined hydraulic pump station can be operated to screw the bolts by using the hydraulic stretcher;
s4, after one bolt is screwed down, rotating the hand wheel to separate the hydraulic stretcher from the bolt, mounting a lifting rod after separation to connect the hydraulic stretcher and the supporting seat into a whole, rotating the hand wheel again to integrally lift the hydraulic stretcher until the integral height of the hydraulic stretcher exceeds the top of the bolt, pushing the movable integrated platform to the next bolt stretching station, and repeating the step S3;
s5 repeats step S4 until all bolts are tightened.
The invention has the following beneficial effects:
1. the mobile integrated platform of the large hydraulic stretcher has high integration level, has integrated functions of moving, using and storing, is simple to operate when in use, stores the hydraulic stretcher after the use is finished, and is suitable for hydraulic stretching tightness work in different use environments and different types and sizes.
2. The moving integrated platform of the large hydraulic stretcher is high in integration level, a group of height-adjustable supporting legs are designed by utilizing the step surface at the joint of the main shaft according to the structural characteristics of the main shaft of the hydraulic power station hydraulic generator, when the main shaft connecting bolt of the hydraulic turbine is tightened, the operation is simpler, and the hydraulic stretching tightening difficulty of the main shaft connecting bolt of the hydraulic turbine is reduced.
3. The application method of the large hydraulic stretcher moving integrated platform simplifies the hydraulic stretching scheme of the main shaft bolt of the hydraulic generator, can greatly reduce the labor intensity of field workers, greatly improves the bolt stretching work efficiency, can realize the rapid, safe, time-saving and labor-saving completion of the bolt stretching work of important parts, and effectively ensures the safety of equipment and personnel.
Drawings
FIG. 1 is a schematic view of a state structure according to the present invention.
Fig. 2 is another structural diagram of the present invention.
Fig. 3 is a schematic top view of fig. 2.
Fig. 4 is a schematic structural view of the telescopic leg of the present invention.
Fig. 5 is a schematic structural diagram of a use state of the present invention.
In the figure: 10. moving the integrated platform body; 11. a limiting plate; 12. a handrail; 20. a support device; 21. fixing the supporting legs; 22. a telescopic leg; 22-1, a hollow rod; 22-2, a movable rod; 23. a universal wheel; 24. a chute; 30. a lifting device; 31. a screw; 32. a hand wheel; 40. a hydraulic stretcher; 41. a support; 42. positioning a plate; 43. adjusting the window; 44. a lifting bar; 45. a support threaded sleeve; 46. a supporting seat; 47. a thrust bearing; 50. a combined hydraulic pump station; 51. and a control button.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to fig. 5, an embodiment of the present invention provides a large hydraulic stretcher moving integrated platform, which includes a moving integrated platform body 10, the moving integrated platform body 10 is supported by a supporting device 20, a hydraulic stretcher 40 is connected inside the moving integrated platform body 10 through a lifting device 30, and a combined hydraulic pump station 50 working in cooperation with the hydraulic stretcher 40 is installed inside the moving integrated platform body 10; wherein, the first and the second end of the pipe are connected with each other,
the lifting device 30 comprises a screw rod 31 vertically and rotatably installed in the mobile integrated platform body 10 and a hand wheel 32 fixedly connected to the top of the screw rod 31, the top of the hydraulic stretcher 40 is fixedly connected with a support 41, and the screw rod 31 is in threaded connection with the support 41;
the inner wall of the mobile integrated platform body 10 is connected with two limiting plates 11, the outer wall of the hydraulic stretcher 40 is provided with a positioning plate 42, and the positioning plate 42 is limited between the two limiting plates 11.
In the above embodiment, referring to fig. 2 and fig. 4, the supporting device 20 includes a set of fixed supporting legs 21 and a set of telescopic supporting legs 22 connected to the mobile integrated platform body 10, and lockable universal wheels 23 are mounted at the bottoms of the fixed supporting legs 21 and the telescopic supporting legs 22; the telescopic supporting legs 22 comprise hollow rods 22-1 fixedly connected with the mobile integrated platform body 10, movable rods 22-2 are movably mounted in the hollow rods 22-1, sliding grooves 24 used for adjusting the connection positions of bolts are formed in the hollow rods 22-1 and the movable rods 22-2, and the hollow rods 22-1 and the movable rods 22-2 are connected through the adjusting bolts.
In another embodiment, on the basis of the above embodiment, the bottom of the hydraulic stretcher 40 is detachably connected to a support seat 46, and an adjusting window 43 is formed on a side wall of the support seat 46 and used for stretching, so as to observe the alignment condition of the remaining bolts of the hydraulic stretcher 40 and facilitate the operation of the hydraulic stretcher to realize the connection with nuts; bolt holes are also opened for mounting the lifting rods 44, and the lifting rods 44 are connected between the supporting base 46 and the hydraulic stretcher 40.
In a preferred embodiment, the screw 31 is a trapezoidal screw to improve the connection stability of the hydraulic stretcher 40.
In another preferred embodiment, referring to fig. 3, the combined hydraulic pump station 50 is controlled by a control button 51, which comprises a start button, a stop button, a load button, an unload button, and the like, and a quick connector at the outlet of the combined hydraulic pump station 50 is connected with a quick connector at the end of the hydraulic tensioner 40 through a hose to realize quick connection and disconnection.
In another preferred embodiment, the screw 31 is connected with the mobile integrated platform body 10 through a thrust bearing 47, and is connected with the support 41 through a support screw sleeve 45, and in daily use and maintenance, the support screw sleeve 45 and the trapezoidal screw 31 need to be coated with grease to ensure lubrication, and the action is flexible and reliable; the support 41 is fixed at the center of the top of the hydraulic stretcher 40 through a bolt, the support 41 is a convex mechanism, the structure is compact and stable, and the weight requirement of lifting a large-scale hydraulic stretcher can be completely met.
Preferably, the handrail 12 is connected to the mobile integrated platform body 10, and the handrail 12 is used for pushing the mobile integrated platform when moving, so that accidents such as side turning of the mobile integrated platform can be prevented.
According to the invention, a hydraulic stretcher 40 is fixedly placed inside a movable integrated platform body 10 through a lifting device 30, the body is supported by a set of height-adjustable supporting devices 20 and can realize universal movement and locking fixation, a combined hydraulic pump station 50 is integrally installed inside the body, the combined hydraulic pump station 50 is controlled through a control button device, a pump station outlet quick joint is connected with a quick joint at the end part of the hydraulic stretcher 40 through a hydraulic hose so as to realize stretching work of a bolt at an important part, after the bolt is stretched, the hydraulic hose is disassembled, the lifting device 30 of the hydraulic stretcher 40 is operated, the hydraulic stretcher 40 is lifted to be above the top of the bolt, the integrated platform can be moved to the next bolt stretching station through pushing and controlling a handrail, the whole bolt stretching work can be completed by reducing 3-4 persons to 1-2 persons originally, and the labor force is completely released.
The embodiment is particularly suitable for the stretching work of the spindle connecting bolt of the hydraulic generator of the hydropower station, the connecting position of the spindle connecting bolt of the hydraulic generator has certain height difference, the width of a platform is not enough to completely place a mobile device, and a plurality of operators can not conveniently and independently operate the hydraulic stretcher on the platform to stretch the connecting bolt, so that a group of fixed supporting legs 21 and a group of telescopic supporting legs 22 are adopted in the design of the supporting device 20, when the hydraulic stretching device is used, the telescopic supporting legs 22 are adjusted to be consistent with the height difference of the spindle connecting step of the hydraulic generator, even if the height of the telescopic supporting legs 22 and the step at the spindle connecting part of the hydraulic generator is consistent with the height of the fixed supporting legs 21 in the invention, and the operability space of the hydraulic stretcher 40 is increased. After the stretching work of one connecting bolt is completed, only the pushing device is required to move on the step at the connecting part of the main shaft of the hydraulic generator integrally, so that the other connecting bolt can be quickly reached, the next stretching work is carried out, and the efficiency of the bolt stretching work is greatly improved.
This patent totally has three kinds of service states, is respectively:
the state I: referring to fig. 1, the hydraulic stretcher 40 is lifted to the position, which shows that the hydraulic stretcher is at the highest position and is higher than the top of the bolt to be tensioned (or loosened), and at this time, the whole integrated platform can perform operations such as moving, rotating, transferring and the like;
II, state: referring to fig. 2, the hydraulic tensioner is lowered to the position where the support 46 is completely disposed outside the nut, and the lifting rod 44 between the hydraulic tensioner 40 and the support 46 is released, so as to perform the operation of tightening (or loosening) the bolt;
III state: after the front telescopic supporting legs 22 are extended and the length of the front telescopic supporting legs is consistent with that of the fixed supporting legs 21, the integrated platform can be placed on the ground for moving, storing, hoisting and the like.
In the use, especially when needing frequently to remove the stretcher position, the convenience of integrated platform just seems very important, such as when shafting is connected, when needing to carry out the bolt and stretch in X, Y direction symmetry, the stretching and the transfer work of bolt can be accomplished to this patent fast, efficient, and factor of safety is high, can effectively ensure equipment and personnel's safety.
The embodiment provides a use method of a large hydraulic stretcher moving integrated platform, and with reference to fig. 5, the use method includes the following steps:
s1, adjusting the height of a telescopic leg 22 of the mobile integrated platform, lifting the telescopic leg to the upper part of a rotor central body and placing the telescopic leg on an upper end shaft A and the rotor central body B;
s2, connecting the combined hydraulic pump station 50 with the hydraulic stretcher 40 through a hydraulic hose, finely adjusting the position of the movable integrated platform to enable the position to be opposite to the top of the connecting bolt, and operating the hand wheel 32 to enable the hydraulic stretcher 40 to integrally descend;
s3, when the support seat 46 of the hydraulic stretcher descends to the plane of the upper end shaft A, the lifting rod 44 of the hydraulic stretcher 40 is removed, the hydraulic stretcher 40 is separated from the support seat 46, and the combined hydraulic pump station 50 can be operated to perform bolt tightening work by using the hydraulic stretcher 40;
s4, after one bolt is screwed down, the hand wheel 32 is rotated to separate the hydraulic stretcher 40 from the bolt, the lifting rod 44 of the hydraulic stretcher is installed after the separation, the hydraulic stretcher 40 and the supporting seat 46 are connected into a whole, the hand wheel 32 is rotated again to integrally lift the hydraulic stretcher 40 until the integral height of the hydraulic stretcher 40 exceeds the top of the bolt, the movable integrated platform is pushed to the next bolt stretching station, and then the step S3 is repeated;
s5 repeats step S4 until all bolts are tightened.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. The utility model provides a large-scale hydraulic stretcher removes integrated platform which characterized in that: the hydraulic drawing device comprises a mobile integrated platform body, wherein the mobile integrated platform body is supported by a supporting device, a hydraulic drawing device is connected in the mobile integrated platform body through a lifting device, and a combined hydraulic pump station which is matched with the hydraulic drawing device to work is arranged in the mobile integrated platform body; wherein the content of the first and second substances,
the lifting device comprises a screw rod vertically and rotatably arranged in the movable integrated platform body and a hand wheel fixedly connected to the top of the screw rod, the top of the hydraulic stretcher is fixedly connected with a support, and the screw rod is in threaded connection with the support;
the inner wall of the movable integrated platform body is connected with two limiting plates, the outer wall of the hydraulic stretcher is provided with a positioning plate, and the positioning plate is limited between the two limiting plates.
2. The large hydraulic stretcher mobile integrated platform according to claim 1, characterized in that: the supporting device comprises a group of fixed supporting legs and a group of telescopic supporting legs, wherein the fixed supporting legs and the telescopic supporting legs are connected with the mobile integrated platform body, and lockable universal wheels are arranged at the bottoms of the fixed supporting legs and the telescopic supporting legs.
3. The large hydraulic stretcher mobile integrated platform according to claim 2, characterized in that: the telescopic supporting leg comprises a hollow rod fixedly connected with the mobile integrated platform body, a movable rod is movably mounted in the hollow rod, sliding grooves used for adjusting the connection position of the bolts are formed in the hollow rod and the movable rod, and the hollow rod is connected with the movable rod through bolts.
4. The large hydraulic stretcher mobile integrated platform according to claim 1, characterized in that: the bottom of the hydraulic stretcher is detachably connected with a supporting seat, an adjusting window is formed in the side wall of the supporting seat, a bolt hole for installing a lifting rod is further formed in the side wall of the supporting seat, and the lifting rod is connected between the supporting seat and the hydraulic stretcher.
5. The large hydraulic stretcher mobile integrated platform according to claim 1, characterized in that: the screw rod is a trapezoidal screw rod.
6. The large hydraulic stretcher mobile integrated platform according to claim 1, characterized in that: the combined hydraulic pump station is controlled by a control button, and a quick connector at the outlet of the combined hydraulic pump station is connected with a quick connector at the end part of the hydraulic stretcher through a hose.
7. The large hydraulic stretcher mobile integrated platform according to claim 5, characterized in that: the screw rod is connected with the movable integrated platform body through a thrust bearing and connected with the support through a support threaded sleeve.
8. The large hydraulic stretcher mobile integrated platform according to claim 1, characterized in that: the mobile integrated platform body is connected with the handrail.
9. A use method of a large hydraulic stretcher moving integrated platform is characterized by comprising the following steps:
s1, adjusting the height of a telescopic leg of a mobile integrated platform, lifting the telescopic leg to the upper part of a rotor central body and placing the telescopic leg on an upper end shaft and the rotor central body;
s2, connecting the combined hydraulic pump station with a hydraulic stretcher through a hydraulic hose, finely adjusting the position of the movable integrated platform to enable the position to be opposite to the top of the connecting bolt, and operating a hand wheel to enable the hydraulic stretcher to integrally descend;
s3, when the support seat of the hydraulic stretcher descends to the plane of the upper end shaft, the lifting rod of the hydraulic stretcher is removed, the hydraulic stretcher is separated from the support seat, and the combined hydraulic pump station can be operated to screw the bolts by using the hydraulic stretcher;
s4, after one bolt is screwed down, rotating the hand wheel to separate the hydraulic stretcher from the bolt, mounting a lifting rod after separation to connect the hydraulic stretcher and the supporting seat into a whole, rotating the hand wheel again to integrally lift the hydraulic stretcher until the integral height of the hydraulic stretcher exceeds the top of the bolt, pushing the movable integrated platform to the next bolt stretching station, and repeating the step S3;
s5 repeats step S4 until all bolts are tightened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210842871.2A CN115179027A (en) | 2022-07-18 | 2022-07-18 | Large hydraulic stretcher moving integrated platform and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210842871.2A CN115179027A (en) | 2022-07-18 | 2022-07-18 | Large hydraulic stretcher moving integrated platform and use method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115179027A true CN115179027A (en) | 2022-10-14 |
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ID=83519299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210842871.2A Pending CN115179027A (en) | 2022-07-18 | 2022-07-18 | Large hydraulic stretcher moving integrated platform and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115179027A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040261583A1 (en) * | 2001-09-17 | 2004-12-30 | Jorg Hohmann | Hydraulic threaded bolt tightening device and method for tightening large bolt connections by using the hydraulic threaded bolt tightening device |
| US20150158408A1 (en) * | 2013-12-10 | 2015-06-11 | Paul Mason | Self-loading dolly |
| CN105798599A (en) * | 2016-05-05 | 2016-07-27 | 国家电网公司 | Lifting moving type hydraulic trolley for dismounting and mounting of bolts through bottom ring stretching |
| CN108910796A (en) * | 2018-06-28 | 2018-11-30 | 芜湖新尚捷智能信息科技有限公司 | A kind of novel elevating platform easy to remove |
| CN211421978U (en) * | 2019-11-01 | 2020-09-04 | 国唐汽车有限公司 | Car roof overhauling platform |
| CN211978549U (en) * | 2020-01-06 | 2020-11-20 | 上海本安实业发展有限公司 | Hydraulic stretcher is suppressed and is tried out leakage and put |
| CN213319931U (en) * | 2020-09-24 | 2021-06-01 | 江苏金风科技有限公司 | Auxiliary tool for bolt stretcher |
| CN213889923U (en) * | 2020-12-04 | 2021-08-06 | 天津市京安金属制品有限公司 | Skeleton strorage device is used in steel door production |
-
2022
- 2022-07-18 CN CN202210842871.2A patent/CN115179027A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040261583A1 (en) * | 2001-09-17 | 2004-12-30 | Jorg Hohmann | Hydraulic threaded bolt tightening device and method for tightening large bolt connections by using the hydraulic threaded bolt tightening device |
| US20150158408A1 (en) * | 2013-12-10 | 2015-06-11 | Paul Mason | Self-loading dolly |
| CN105798599A (en) * | 2016-05-05 | 2016-07-27 | 国家电网公司 | Lifting moving type hydraulic trolley for dismounting and mounting of bolts through bottom ring stretching |
| CN108910796A (en) * | 2018-06-28 | 2018-11-30 | 芜湖新尚捷智能信息科技有限公司 | A kind of novel elevating platform easy to remove |
| CN211421978U (en) * | 2019-11-01 | 2020-09-04 | 国唐汽车有限公司 | Car roof overhauling platform |
| CN211978549U (en) * | 2020-01-06 | 2020-11-20 | 上海本安实业发展有限公司 | Hydraulic stretcher is suppressed and is tried out leakage and put |
| CN213319931U (en) * | 2020-09-24 | 2021-06-01 | 江苏金风科技有限公司 | Auxiliary tool for bolt stretcher |
| CN213889923U (en) * | 2020-12-04 | 2021-08-06 | 天津市京安金属制品有限公司 | Skeleton strorage device is used in steel door production |
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