CN112194063A - Electrical power rush-repair ladder - Google Patents

Electrical power rush-repair ladder Download PDF

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Publication number
CN112194063A
CN112194063A CN202011024076.XA CN202011024076A CN112194063A CN 112194063 A CN112194063 A CN 112194063A CN 202011024076 A CN202011024076 A CN 202011024076A CN 112194063 A CN112194063 A CN 112194063A
Authority
CN
China
Prior art keywords
motor
fixedly connected
shaft
rotating shaft
guide rail
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
CN202011024076.XA
Other languages
Chinese (zh)
Inventor
隋霄
尹青青
张健
林令俊
宋滕飞
陈泉
王东升
李雅楠
赵雪梅
董国升
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.)
Yantai Power Supply Co of State Grid Shandong Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Yantai Power Supply Co of State Grid Shandong Electric Power 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 State Grid Corp of China SGCC, Yantai Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202011024076.XA priority Critical patent/CN112194063A/en
Publication of CN112194063A publication Critical patent/CN112194063A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/042Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations actuated by lazy-tongs mechanisms or articulated levers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F13/00Common constructional features or accessories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006Safety devices, e.g. for limiting or indicating lifting force for working platforms

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

The invention discloses an electric power rush-repair ladder, which comprises a base and a guide rail, wherein the lower end of the base is welded with a supporting leg, the supporting legs are internally provided with a groove, the groove is internally provided with an air cylinder, the tail end of a telescopic shaft of the air cylinder is provided with a wheel seat, the lower end of the wheel seat is provided with a universal wheel, the right side of the upper end of the base is fixedly connected with a motor seat, a first motor is arranged at the upper end of the motor base, a rotating shaft is sleeved outside a first motor shaft of the first motor, the upper end of the base is fixedly connected with a box body, a shaft sleeve is arranged inside the right side of the box body, a rotating shaft is sleeved inside the shaft sleeve in a sliding manner, the invention relates to an electric power rush-repair ladder which has the characteristics of automatic lifting and short-distance parallel movement.

Description

Electrical power rush-repair ladder
Technical Field
The invention belongs to the technical field of power rush-repair ladders, and particularly relates to a power rush-repair ladder.
Background
At present, each household electrical power supply unit carries an electrical power rush-repair ladder to carry out specific operation by a transformer overhaul worker during routine maintenance and emergency maintenance of a transformer substation. However, the current power emergency repair ladder has some problems: 1. only the climbing function can be realized, the protection of constructors is paid little attention, the problem of the emergency repair ladder is caused to damage the personnel, and the electric power and the personnel safety are damaged; 2. the operating range of the staff is small, and the position needs to be changed frequently. Therefore, it is necessary to design an electrical power emergency repair ladder.
The invention content is as follows:
the present invention is directed to solving the above problems by providing an electrical power emergency repair ladder, which solves the problems mentioned in the background art.
In order to solve the above problems, the present invention provides a technical solution:
the utility model provides an electrical power rush-repair ladder, includes base, guide rail, the lower extreme welding of base has the supporting leg, the inside recess of having seted up of supporting leg, the internally mounted of recess has the cylinder, the wheel seat is installed to the end of the telescopic shaft of cylinder, the universal wheel is installed to the lower extreme of wheel seat, the upper end right side fixedly connected with motor cabinet of base, first motor is installed to the upper end of motor cabinet, the pivot has been cup jointed to the outside of the first motor shaft of first motor, the upper end fixedly connected with box of base, the inside axle sleeve that is provided with in right side of box, the pivot has been cup jointed in the inside slip of axle sleeve, the fixed cover of inboard fixedly connected with axle tail of box, the fixed cover of axle tail rotates with the pivot to.
Preferably, the number of the supporting legs is four, and the four supporting legs are uniformly distributed at the lower end of the base.
As preferred, the inside sliding connection of pivot has fixing bolt, fixing bolt's end and first motor shaft threaded connection, the pivot runs through the axle sleeve and extends to inside the box, there is the movable block outside of pivot through threaded connection, the articulated seat of upper end fixedly connected with of movable block, the upper end of articulated seat articulates there is the connecting rod the upper end fixedly connected with connecting cylinder of connecting rod, the through-hole has been seted up to the inside of upper end of box, the inside sliding connection of through-hole has the lift post, the open slot has been seted up to the inside of lift post, the inside of lift post is provided with the dead lever, the dead lever runs through the open slot, the outside of dead lever just is located the open slot inboard and rotates and is connected with the connecting cylinder.
Preferably, the outer portion of the rotating shaft is fixedly connected with a limiting ring, the rotating shaft is a forward and reverse threaded screw rod, and the forward and reverse threaded screw rods of the rotating shaft are symmetrically distributed on two sides of the limiting ring.
As preferred, the upper end fixedly connected with fixed block of lift post, the fixed block is L type and quantity is two, two fixed block symmetric distribution is in the upper end of lift post, the slide rail has been seted up to the inside of guide rail, the inside sliding connection of slide rail has the fixed block, the quantity of slide rail is two, two slide rail symmetric distribution is in the both sides of guide rail, there is spacing bolt inside of slide rail through threaded connection, spacing bolt runs through the guide rail and extends to the outside of another slide rail, there is the nut terminal outside of spacing bolt through threaded connection, spacing bolt's quantity is two, two spacing bolt symmetric distribution is at the both ends of guide rail, the guide rail is located the top of lift post.
Preferably, the lower extreme fixedly connected with rack of guide rail, the outside meshing of rack has the gear, the outside left side fixedly connected with motor frame of lift post, the second motor is installed to the upper end of motor frame, the terminal fixedly connected with square piece of the second motor shaft of second motor, square groove has been seted up to the inside of gear, square groove runs through the gear, the inside joint in square groove has square piece, the right side contact of gear has the clamp plate, the inside sliding connection of clamp plate has the screw, the end and the square piece threaded connection of screw, the outside upper end meshing of gear has the rack.
Preferably, the upper end of the guide rail is fixedly connected with an operation table, a support is welded on the right side of the outside of the operation table, and an illuminating lamp is installed at the upper end of the support.
Preferably, the lower end of the moving block is provided with a pulley, the bottom of the inner side of the box body is provided with a sliding groove, and the inside of the sliding groove is connected with the pulley in a sliding manner.
The invention has the beneficial effects that: the invention relates to a power rush-repair ladder which has the characteristics of automatic lifting and short-distance parallel movement, and compared with the traditional rush-repair ladder, the power rush-repair ladder has the following two beneficial effects in specific use:
firstly, replacing the traditional mode that workers need to climb by themselves, the workers enter the operation table, the first motor is controlled, the first motor shaft of the first motor drives the rotating shaft to rotate, the moving block in threaded connection with the outer portion of the rotating shaft moves horizontally, the moving block drives the connecting rod to move through the hinge base, the connecting rod drives the lifting column to move upwards, so that the operation table is driven to move upwards, time and labor are saved, and the safety of the workers standing in the operation table is also protected;
secondly, through controlling the second motor, the second motor shaft drive gear of second motor rotates, and the gear drives the rack and removes to drive the guide rail and remove, further drive the operation panel and remove, make staff's operating space grow, need not frequently from salvageing the ladder and getting off and change the position again, convenience very.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a side view of the guide rail of the present invention;
FIG. 3 is a side view of the gear of the present invention;
FIG. 4 is an enlarged view of the portion A of FIG. 1 according to the present invention;
FIG. 5 is an enlarged view of the portion B of FIG. 1 according to the present invention;
FIG. 6 is an enlarged view of the structure of the portion C of FIG. 1 according to the present invention;
fig. 7 is a side view of the guide rail of the present invention.
In the figure: 1. a base; 2. supporting legs; 3. a groove; 4. a cylinder; 5. a telescopic shaft; 6. a wheel seat; 7. a universal wheel; 8. a motor base; 9. a first motor; 10. a first motor shaft; 11. a rotating shaft; 12. fixing the bolt; 13. a box body; 14. a shaft sleeve; 15. fixing a shaft tail sleeve; 16. a moving block; 17. a hinged seat; 18. a connecting rod; 19. a through hole; 20. a lifting column; 21. a fixed block; 22. an operation table; 23. a support; 24. an illuminating lamp; 25. a slide rail; 26. a limit bolt; 27. a rack; 28. a motor frame; 29. a second motor; 30. a second motor shaft; 31. a gear; 32. a limiting ring; 33. a chute; 34. fixing the rod; 35. an open slot; 36. a connecting cylinder; 37. a pulley; 38. a guide rail; 39. a square block; 40. a square groove; 41. pressing a plate; 42. a screw; 43. and a nut.
The specific implementation mode is as follows:
as shown in fig. 1 to 7, the following technical solutions are adopted in the present embodiment:
example (b):
the utility model provides an electrical power rush-repair ladder, includes base 1, guide rail 38, the lower extreme welding of base 1 has supporting leg 2, recess 3 has been seted up to the inside of supporting leg 2, the internally mounted of recess 3 has cylinder 4, wheel seat 6 is installed to the end of the telescopic shaft 5 of cylinder 4, universal wheel 7 is installed to the lower extreme of wheel seat 6, upper end right side fixedly connected with motor cabinet 8 of base 1, first motor 9 is installed to the upper end of motor cabinet 8, pivot 11 has been cup jointed to the outside of the first motor shaft 10 of first motor 9, the upper end fixedly connected with box 13 of base 1, the inside axle sleeve 14 that is provided with in right side of box 13, pivot 11 has been cup jointed in the inside slip of axle sleeve 14, the fixed cover 15 of inboard fixedly connected with axle tail of box 13, the fixed cover 15 of axle tail rotates with pivot 11 to be connected.
The number of the supporting legs 2 is four, and the supporting legs 2 are evenly distributed at the lower end of the base 1.
The inside sliding connection of pivot 11 has fixing bolt 12, the end and the first motor shaft 10 threaded connection of fixing bolt 12, pivot 11 runs through axle sleeve 14 and extends to inside box 13, there is movable block 16 outside of pivot 11 through threaded connection, the articulated seat 17 of upper end fixedly connected with of movable block 16, the upper end of articulated seat 17 articulates there is connecting rod 18 the upper end fixedly connected with connecting cylinder 36 of connecting rod 18, through-hole 19 has been seted up to the inside of the upper end of box 13, the inside sliding connection of through-hole 19 has lift post 20, open slot 35 has been seted up to the inside of lift post 20, the inside of lift post 20 is provided with dead lever 34, dead lever 34 runs through open slot 35, the outside of dead lever 34 just is located open slot 35 inboard and rotates and is connected with connecting cylinder 36.
The outer portion of the rotating shaft 11 is fixedly connected with a limiting ring 32, the rotating shaft 11 is a forward and reverse threaded screw rod, and the forward and reverse threaded screw rods of the rotating shaft 11 are symmetrically distributed on two sides of the limiting ring 32.
Wherein, the upper end fixedly connected with fixed block 21 of lift post 20, fixed block 21 is L type and quantity is two, two fixed block 21 symmetric distribution is in the upper end of lift post 20, slide rail 25 has been seted up to the inside of guide rail 38, the inside sliding connection of slide rail 25 has fixed block 21, the quantity of slide rail 25 is two, two slide rail 25 symmetric distribution is in the both sides of guide rail 38, there is stop bolt 26 in the inside of slide rail 25 through threaded connection, stop bolt 26 runs through guide rail 38 and extends to the outside of another slide rail 25, there is nut 43 terminal outside of stop bolt 26 through threaded connection, stop bolt 26's quantity is two, two stop bolt 26 symmetric distribution is at the both ends of guide rail 38, guide rail 38 is located the top of lift post 20.
Wherein, the lower extreme fixedly connected with rack 27 of guide rail 38, the outside meshing of rack 27 has gear 31, the outside left side fixedly connected with motor frame 28 of lift post 20, second motor 29 is installed to the upper end of motor frame 28, the terminal fixedly connected with square piece 39 of second motor shaft 30 of second motor 29, square groove 40 has been seted up to the inside of gear 31, square groove 40 runs through gear 31, the inside joint of square groove 40 has square piece 39, the right side contact of gear 31 has clamp plate 41, the inside sliding connection of clamp plate 41 has screw 42, the end and the square piece 39 threaded connection of screw 42, the outside upper end meshing of gear 31 has rack 27.
The upper end of the guide rail 38 is fixedly connected with an operating table 22, a support 23 is welded on the right side of the outside of the operating table 22, and an illuminating lamp 24 is installed at the upper end of the support 23.
Pulleys 37 are mounted at the lower end of the moving block 16, a sliding groove 33 is formed in the bottom of the inner side of the box body 13, and the pulleys 37 are connected to the inside of the sliding groove 33 in a sliding mode.
The using state of the invention is as follows: when the emergency power repair ladder is used, the air cylinder 4 is opened, the telescopic shaft 5 of the air cylinder 4 pushes the wheel seat 6 to move downwards, the wheel seat 6 drives the universal wheel 7 to move downwards until the universal wheel 7 is contacted with the ground, the opposite emergency power repair ladder is lifted off the ground, then the emergency power repair ladder is moved to a preset place, the air cylinder 4 is controlled, the telescopic shaft 5 of the air cylinder 4 is moved upwards, the universal wheel 7 is driven to move upwards until the universal wheel 7 is moved into the groove 3, the supporting legs 2 are contacted with the ground at the moment, the position of the emergency power repair ladder is fixed, then a worker enters the operation table 22, the first motor 9 is started, the first motor shaft 10 of the first motor 9 drives the rotating shaft 11 to rotate, the moving block 16 in threaded connection with the outer part of the rotating shaft 11 moves horizontally, the moving block 16 drives the connecting rod 18 to move through the hinge seat 17, the connecting rod 18 drives the lifting column 20 to move upwards, and the operation table 22, after arriving the position that needs the maintenance, close first motor 9, the staff maintains the operation, time saving and labor saving, the staff stands in operation panel 22 self safety has also obtained the protection, light 24 provides illumination for the staff, through controlling second motor 29, second motor shaft 30 of second motor 29 drives gear 31 and rotates, gear 31 drives rack 27 and removes, thereby drive guide rail 38 and remove, further drive operation panel 22 and remove, make staff's operating space grow, need not frequently to follow the change position again of salvageing the ladder, convenience very.
While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides an electrical power rush-repair ladder which characterized in that: comprises a base (1) and a guide rail (38), wherein a supporting leg (2) is welded at the lower end of the base (1), a groove (3) is formed in the supporting leg (2), a cylinder (4) is installed in the groove (3), a wheel seat (6) is installed at the tail end of a telescopic shaft (5) of the cylinder (4), a universal wheel (7) is installed at the lower end of the wheel seat (6), a motor seat (8) is fixedly connected to the right side of the upper end of the base (1), a first motor (9) is installed at the upper end of the motor seat (8), a rotating shaft (11) is sleeved outside a first motor shaft (10) of the first motor (9), a box body (13) is fixedly connected to the upper end of the base (1), a shaft sleeve (14) is arranged inside the right side of the box body (13), and the rotating shaft (11) is sleeved inside the shaft sleeve (14, the inner side of the box body (13) is fixedly connected with a shaft tail fixing sleeve (15), and the shaft tail fixing sleeve (15) is rotatably connected with the rotating shaft (11).
2. An electrical power rush-repair ladder according to claim 1, characterized in that: the number of the supporting legs (2) is four, and the supporting legs (2) are evenly distributed at the lower end of the base (1).
3. An electrical power rush-repair ladder according to claim 1, characterized in that: the inner part of the rotating shaft (11) is slidably connected with a fixed bolt (12), the tail end of the fixed bolt (12) is in threaded connection with a first motor shaft (10), the rotating shaft (11) penetrates through a shaft sleeve (14) and extends to the inner part of a box body (13), the outer part of the rotating shaft (11) is in threaded connection with a movable block (16), the upper end of the movable block (16) is fixedly connected with a hinged seat (17), the upper end of the hinged seat (17) is hinged with a connecting rod (18), the upper end of the connecting rod (18) is fixedly connected with a connecting cylinder (36), the inner part of the upper end of the box body (13) is provided with a through hole (19), the inner part of the through hole (19) is slidably connected with a lifting column (20), the inner part of the lifting column (20) is provided with an open slot (35), the inner part of the lifting column (20) is, the outer part of the fixed rod (34) is positioned at the inner side of the opening groove (35) and is rotatably connected with a connecting cylinder (36).
4. An electrical power rush-repair ladder according to claim 1, characterized in that: the outer portion of the rotating shaft (11) is fixedly connected with a limiting ring (32), the rotating shaft (11) is a forward and reverse rotation threaded screw rod, and the forward rotation screw rod and the reverse rotation screw rod of the rotating shaft (11) are symmetrically distributed on two sides of the limiting ring (32).
5. An electrical power rush-repair ladder according to claim 3, characterized in that: the upper end fixedly connected with fixed block (21) of lift post (20), fixed block (21) are L type and quantity is two, two fixed block (21) symmetric distribution is in the upper end of lift post (20), slide rail (25) have been seted up to the inside of guide rail (38), the inside sliding connection of slide rail (25) has fixed block (21), the quantity of slide rail (25) is two, two slide rail (25) symmetric distribution is in the both sides of guide rail (38), there is stop bolt (26) inside of slide rail (25) through threaded connection, stop bolt (26) run through guide rail (38) and extend to the outside of another slide rail (25), there are nut (43) terminal outside of stop bolt (26) through threaded connection, the quantity of stop bolt (26) is two, two stop bolt (26) symmetric distribution is at the both ends of guide rail (38), the guide rail (38) is located above the lifting column (20).
6. An electrical power rush-repair ladder according to claim 5, characterized in that: the lower end of the guide rail (38) is fixedly connected with a rack (27), a gear (31) is meshed outside the rack (27), the left side of the outer part of the lifting column (20) is fixedly connected with a motor frame (28), the upper end of the motor frame (28) is provided with a second motor (29), the tail end of a second motor shaft (30) of the second motor (29) is fixedly connected with a square block (39), a square groove (40) is arranged inside the gear (31), the square groove (40) penetrates through the gear (31), a square block (39) is clamped in the square groove (40), a pressure plate (41) is contacted with the right side of the gear (31), the inner portion of the pressing plate (41) is connected with a screw (42) in a sliding mode, the tail end of the screw (42) is in threaded connection with the square block (39), and the upper end of the outer portion of the gear (31) is meshed with the rack (27).
7. An electrical power rush-repair ladder according to claim 5, characterized in that: the upper end fixedly connected with operation panel (22) of guide rail (38), the outside right side welding of operation panel (22) has support (23), light (24) are installed to the upper end of support (23).
8. An electrical power rush-repair ladder according to claim 3, characterized in that: the lower end of the moving block (16) is provided with a pulley (37), the bottom of the inner side of the box body (13) is provided with a sliding groove (33), and the inside of the sliding groove (33) is connected with the pulley (37) in a sliding manner.
CN202011024076.XA 2020-09-25 2020-09-25 Electrical power rush-repair ladder Pending CN112194063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011024076.XA CN112194063A (en) 2020-09-25 2020-09-25 Electrical power rush-repair ladder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011024076.XA CN112194063A (en) 2020-09-25 2020-09-25 Electrical power rush-repair ladder

Publications (1)

Publication Number Publication Date
CN112194063A true CN112194063A (en) 2021-01-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011024076.XA Pending CN112194063A (en) 2020-09-25 2020-09-25 Electrical power rush-repair ladder

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CN (1) CN112194063A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000026080A (en) * 1998-07-14 2000-01-25 Nec Eng Ltd Elevating apparatus and cleaning apparatus for color cathode-ray tube panel therewith
CN103182270A (en) * 2013-03-01 2013-07-03 湖州杭华油墨科技有限公司 Drive shaft regulating device for mixing head
CN104821501A (en) * 2015-05-27 2015-08-05 国网山东平阴县供电公司 Auxiliary device for mounting current transformer of middle-arranged switchgear
CN108081220A (en) * 2017-12-11 2018-05-29 邓之玉 A kind of five metalworkings mobile hidden workbench
CN109372897A (en) * 2018-11-16 2019-02-22 中国航空工业集团公司洛阳电光设备研究所 A kind of installation fixed structure of motor output shaft and gear
CN209038965U (en) * 2018-09-26 2019-06-28 陈利 A kind of safety cage for housing construction
CN209815615U (en) * 2019-05-17 2019-12-20 牛锐 Be used for housing construction to use safe companion ladder

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000026080A (en) * 1998-07-14 2000-01-25 Nec Eng Ltd Elevating apparatus and cleaning apparatus for color cathode-ray tube panel therewith
CN103182270A (en) * 2013-03-01 2013-07-03 湖州杭华油墨科技有限公司 Drive shaft regulating device for mixing head
CN104821501A (en) * 2015-05-27 2015-08-05 国网山东平阴县供电公司 Auxiliary device for mounting current transformer of middle-arranged switchgear
CN108081220A (en) * 2017-12-11 2018-05-29 邓之玉 A kind of five metalworkings mobile hidden workbench
CN209038965U (en) * 2018-09-26 2019-06-28 陈利 A kind of safety cage for housing construction
CN109372897A (en) * 2018-11-16 2019-02-22 中国航空工业集团公司洛阳电光设备研究所 A kind of installation fixed structure of motor output shaft and gear
CN209815615U (en) * 2019-05-17 2019-12-20 牛锐 Be used for housing construction to use safe companion ladder

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Effective date of registration: 20210602

Address after: 264000 Jiefang Road 158, Zhifu District, Yantai, Shandong

Applicant after: State Grid Shandong Electric Power Company Yantai Power Supply Co.

Address before: 264000 Jiefang Road 158, Zhifu District, Yantai, Shandong

Applicant before: State Grid Shandong Electric Power Company Yantai Power Supply Co.

Applicant before: STATE GRID CORPORATION OF CHINA

RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20210108