CN111632355A - Handheld pole device of stepping on of integral type bullet knot - Google Patents
Handheld pole device of stepping on of integral type bullet knot Download PDFInfo
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- CN111632355A CN111632355A CN202010489539.3A CN202010489539A CN111632355A CN 111632355 A CN111632355 A CN 111632355A CN 202010489539 A CN202010489539 A CN 202010489539A CN 111632355 A CN111632355 A CN 111632355A
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- clamping jaw
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B27/00—Apparatus for climbing poles, trees, or the like
- A63B27/02—Climbing devices for round poles or trees attachable to the feet
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Abstract
The invention relates to the technical field of power maintenance equipment, and discloses an integrated elastic buckle handheld pole climbing device, which comprises: the clamping device comprises a first clamping jaw and a second clamping jaw, wherein the first clamping jaw and the second clamping jaw can be opened and closed mutually, are both arc-shaped, and form a clamping space for clamping a rod to be climbed between the first clamping jaw and the second clamping jaw; the two ends of the connecting rod are hinged to the first clamping jaw and the second clamping jaw respectively, and the connecting rod drives the first clamping jaw to move towards the second clamping jaw through rotation so as to realize opening and closing; the two ends of the elastic piece are respectively connected to the first clamping jaw and the second clamping jaw and used for resetting the first clamping jaw and the second clamping jaw. The integrated elastic buckle handheld pole climbing device provided by the invention is matched with the climber for use, so that the acting points of workers in the pole climbing and pole climbing operation process are increased, the problem that the workers only exert force on legs but do not exert force on hands is solved, and the safety is improved.
Description
Technical Field
The invention relates to the technical field of power maintenance equipment, in particular to an integrated elastic buckle handheld rod climbing device.
Background
At present, power maintenance personnel of power supply stations in rural areas mostly use climbers in pole climbing operation. The acting points of climbing the rod by using the climbers are all on the legs, and the staff hold the rod body by hands without acting force. And step on the pole operation and still need bear multiplexer utensil bag and transmission multiplexer utensil, step on pole and the operation on the pole for a long time, the staff all has shank flesh and ache and feels, and the physical power that the operation consumed on the pole is also far more than the physical power that ground operation consumed. And the pole climbing operation safety is lower by using the climbers alone.
Disclosure of Invention
Based on the above, the invention aims to provide an integrated elastic buckle handheld pole climbing device which is used for finishing pole climbing and pole climbing operation in cooperation with a climber and improving the safety and convenience of pole climbing operation of workers.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a pole device is stepped on in handheld lock of integral type bullet knot, it includes:
the clamping device comprises a first clamping jaw and a second clamping jaw, wherein the first clamping jaw and the second clamping jaw can be opened and closed mutually, are both arc-shaped, and form a clamping space for clamping a rod to be climbed between the first clamping jaw and the second clamping jaw;
the two ends of the connecting rod are respectively hinged to the first clamping jaw and the second clamping jaw, and the connecting rod drives the first clamping jaw to move towards the second clamping jaw through rotation so as to realize opening and closing;
the two ends of the elastic piece are respectively connected to the first clamping jaw and the second clamping jaw, and the elastic piece is used for resetting the second clamping jaw relative to the first clamping jaw.
As an integral type bullet is detained handheld preferred scheme of climbing lever apparatus, first clamping jaw is the major arc shape, the second clamping jaw is inferior arc shape, the second clamping jaw set up in first clamping jaw orientation one side of the centre of a circle of first clamping jaw.
As a preferred scheme of the integrated elastic buckle handheld climbing device, the arc radiuses of the first clamping jaw and the second clamping jaw are between 100mm and 150 mm.
As a preferred scheme of the integrated elastic buckle handheld climbing device, the arc length of the first clamping jaw is 500-600 mm, and the arc length of the second clamping jaw is 200-300 mm.
As a preferred scheme of the integrated elastic buckle handheld climbing rod device, the elastic member is an extension spring, two ends of the extension spring are respectively fixed to the first clamping jaw and the second clamping jaw, when the first clamping jaw and the second clamping jaw are buckled, the extension spring is in a normal state, and when the first clamping jaw and the second clamping jaw are separated, the extension spring is in a compressed state.
As a preferred scheme of the integrated elastic buckle handheld climbing device, the connecting rod comprises a connecting part for holding, and two ends of the connecting part are respectively hinged to the first clamping jaw and the second clamping jaw; or the like, or, alternatively,
the connecting rod includes fixed connection's connecting portion and extension, the both ends of connecting portion articulate respectively in first clamping jaw with the second clamping jaw, the extension stretches out one side that the centre of a circle was kept away from to first clamping jaw, the extension is used for gripping.
As a preferred scheme of the integrated elastic buckle handheld pole climbing device, an anti-slip ring and a plurality of grooves which are convenient to hold are arranged on the connecting portion or the extending portion.
As a preferable scheme of the integrated elastic buckle handheld climbing device, the connecting rod is made of an insulating material.
As an optimal scheme of the integrated elastic buckle handheld climbing rod device, the first clamping jaw and the second clamping jaw are respectively composed of a mutually-attached structural layer and a resistance-increasing layer, and the resistance-increasing layer is arranged on the inner side of the structural layer and is used for being directly contacted with a rod to be climbed.
As a preferred scheme of the integrated elastic buckle handheld climbing rod device, the structural layer is made of high-carbon steel materials, and the resistance-increasing layer is made of anti-skidding rubber materials.
The invention has the beneficial effects that:
the integrated elastic buckle handheld pole climbing device provided by the invention is matched with the foot buckle for use, so that the acting points of a worker in the pole climbing process and the pole working process are increased, the problem that the worker only exerts force on legs but does not exert force on hands is solved, the worker does not need to press the whole body weight on the foot buckle, the safety and the working convenience are improved, and meanwhile, the body burden is reduced. The device has simple principle and convenient use, and is particularly suitable for electric power operation and maintenance operation in rural areas and other areas.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an integrated elastic buckle handheld climbing device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an integrated elastic buckle handheld climbing device according to a second embodiment of the present invention.
In the figure: 1. a first jaw; 11. a first jaw structure layer; 12. a first jaw resistance increasing layer; 2. a second jaw; 21. a second jaw structure layer; 22. a second jaw resistance increasing layer; 3. a connecting rod; 31. a connecting portion; 32. an extension portion; 33. a groove; 34. an anti-slip ring; 4. an elastic member; 5. a first pivot shaft; 6. a second pivot shaft; 100. and (4) clamping the space.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
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; may be directly connected, may be internal to the two elements or may be in an interactive relationship with the two elements. 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. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Example one
As shown in fig. 1, the embodiment provides an integral type spring buckle handheld climbing rod device, which includes a first clamping jaw 1 and a second clamping jaw 2 that can open and close each other, where the first clamping jaw 1 and the second clamping jaw 2 are both arc-shaped, and arc portions of the two clamping jaws form a clamping space 100 for clamping a rod to be climbed, and when the first clamping jaw 1 and the second clamping jaw 2 are buckled with each other, the rod to be climbed is clamped in the clamping space 100, so as to provide stress support for a worker to climb the rod and perform work on the rod. When the first jaw 1 and the second jaw 2 are separated, the pole to be climbed is loosened to move the device to the next grip point of the pole to be climbed to assist the staff in climbing or lowering the pole. The handheld pole climbing device of integral type bullet knot that this embodiment provided is applicable to but not limiting to the field that needs to climb the wire pole and carry out the operation in the electric power industry, and other trades that need to climb the pole operation are the application scope of this device equally.
The first clamping jaw 1 and the second clamping jaw 2 are mutually opened and closed through a connecting rod 3 and an elastic piece 4. The both ends of connecting rod 3 articulate respectively in first clamping jaw 1 and second clamping jaw 2, and the both ends of elastic component 4 fixed connection respectively in first clamping jaw 1 and second clamping jaw 2. When this device during operation, the staff holds first clamping jaw 1 and connecting rod 3, with the direction pulling of connecting rod 3 to the centre of a circle of keeping away from first clamping jaw 1 to drive second clamping jaw 2 and remove, the compression of elastic component 4, centre gripping space 100 grow, when moving this device to the reservation position of waiting to climb the pole, loosen connecting rod 3, first clamping jaw 1 resets under the effect of elastic component 4, waits to climb the pole and is pressed from both sides tightly in centre gripping space 100. The device is suitable for two matched devices, the left hand and the right hand of a worker respectively hold one device, and meanwhile the device is matched with the climbers and can be alternately clamped at positions of the rod to be climbed at different heights, so that the rod climbing or rod descending is realized.
Specifically, the first clamping jaw 1 is composed of a first clamping jaw structure layer 11 and a first clamping jaw resistance increasing layer 12 which are mutually attached and fixed, the first clamping jaw structure layer 11 is used for providing structural support and ensuring the overall structural strength of the device, and the first clamping jaw resistance increasing layer 12 is used for directly contacting with a rod to be climbed so as to be attached to the surface of the rod to be climbed.
In this embodiment, to ensure the overall strength of the device, the first jaw structure layer 11 is preferably made of high-carbon steel. In order to ensure the insulation requirement and prevent the potential safety hazard caused by electric leakage, the first clamping jaw resistance increasing layer 12 is preferably made of an insulating material. Further, the first clamping jaw resistance increasing layer 12 is made of an anti-slip rubber material, the anti-slip rubber material has good insulation performance, the friction coefficient of the anti-slip rubber material is large, and the anti-slip rubber material is firmly attached to the rod to be climbed. The first clamping jaw resistance increasing layer 12 is fixed on the first clamping jaw structure layer 11 in a gluing or embedding mode, and the projection area of the first clamping jaw resistance increasing layer 12 on the first clamping jaw structure layer 11 is larger than the area of the first clamping jaw structure layer 11, so that the edge of the first clamping jaw structure layer 11 is prevented from contacting with a rod to be climbed, and the insulation performance of the device is further guaranteed.
The first clamping jaw 1 is of a major arc structure, and an opening is formed in one side of the first clamping jaw to facilitate the entering and exiting of a rod to be climbed. In the electric power industry, the pole to be climbed is a utility pole, and the diameter of the pole is generally between 150mm and 270 mm. In the embodiment, the radius of the first clamping jaw 1 is preferably set to be between 100mm and 150mm, that is, the diameter of the first clamping jaw 1 is set to be between 200mm and 300mm, so as to clamp telegraph poles with different sizes. Further, the arc length of the first clamping jaw 1 is set to be 500 mm-600 mm, so that the contact area of the first clamping jaw and the outer surface of the telegraph pole is increased, and the clamping stability of the device is improved.
The second jaw 2 is similar in structure to the first jaw 1 and is composed of a second jaw structure layer 21 and a second jaw resistance-increasing layer 22 which are attached to each other. The materials and mutual fixing manner of the second jaw structure layer 21 and the second jaw resistance-increasing layer 22 are the same as those of the first jaw 1, and are not described herein again.
The second clamping jaw 2 is a minor arc structure, is disposed on one side of the first clamping jaw 1 facing the center of the circle of the first clamping jaw 1, and forms a clamping space 100 with the first clamping jaw 1. The radius of the second clamping jaw 2 is the same as that of the first clamping jaw 1, and the second clamping jaw is also arranged between 100mm and 150mm, so that telegraph poles with different sizes and specifications can be clamped. Further, the arc length of the second clamping jaw 2 is set between 200mm and 300mm, so that the size is reduced as much as possible while the friction force with the telegraph pole is ensured, and the holding force of workers is reduced.
The connecting rod 3 is used for being held by a worker and driving the second clamping jaw 2 to move relative to the first clamping jaw 1. The connecting rod 3 is made of an insulating material, preferably the connecting rod 3 is made of carbon fiber or a ceramic material. The connecting rod 3 comprises a connecting portion 31 and two end portions (not shown) located at both ends of the connecting portion 31, the two end portions of the connecting rod 3 being hinged to the first jaw 1 and the second jaw 2, respectively. Specifically, be provided with first fixing base on the first clamping jaw 1, seted up first through-hole in the first fixing base, first pin joint axle 5 is installed to the first through-hole internal rotation, and connecting portion 31 is close to the one end of first clamping jaw 1 and is fixed in on first pin joint axle 5, realizes the articulated between connecting rod 3 and the first clamping jaw 1 through the rotation of first pin joint axle 5 in first through-hole.
The second clamping jaw 2 is provided with a second fixing seat, a second through hole is formed in the second fixing seat, a second pivot shaft 6 is rotatably installed in the second through hole, one end, close to the second clamping jaw 2, of the connecting portion 31 is fixed to the second pivot shaft 6, and the second pivot shaft 6 rotates in the second through hole to achieve hinging between the connecting rod 3 and the second clamping jaw 2.
In order to facilitate the holding of the worker, the connecting rod 3 is provided with the anti-slip ring 34 and the plurality of grooves 33, the shapes of the grooves 33 are matched with the shapes of fingers so as to improve the holding comfort, and the anti-slip ring 34 and the connecting rod 3 are integrally formed so as to improve the structural strength of the connecting rod 3.
The elastic piece 4 is arranged between the first clamping jaw 1 and the second clamping jaw 2 and used for resetting the second clamping jaw 2 and providing clamping force for the first clamping jaw 1 and the second clamping jaw 2 in the process of clamping a rod to be climbed. In this embodiment, the elastic member 4 is an extension spring, and two ends of the extension spring are respectively fixed to the first jaw structure layer 11 and the second jaw structure layer 21. Further, the elastic member 4 is a high-strength extension spring to ensure strength and overall safety of the device.
The elastic part 4 and the whole working principle of the device are as follows: when the worker holds the connecting rod 3 and drives the first clamping jaw 1 to move, the elastic piece 4 is compressed, the clamping space 100 is enlarged at the moment, and the rod to be climbed can be sleeved in the clamping space 100 by moving the device. When the connecting rod 3 is loosened, the first clamping jaw 1 and the second clamping jaw 2 move towards each other and abut against the surface of the rod to be climbed under the elastic action of the elastic piece 4, the elastic deformation of the elastic piece 4 is reduced, the clamping space 100 is reduced, and the rod to be climbed is clamped in the clamping space 100.
Example two
As shown in fig. 2, the embodiment provides a handheld pole-climbing device of integral type bullet knot, and it comprises first clamping jaw 1, second clamping jaw 2, connecting rod 3 and elastic component 4, forms the centre gripping space 100 that is used for the centre gripping pole of waiting to climb between first clamping jaw 1 and the second clamping jaw 2, and connecting rod 3 is used for driving first clamping jaw 1 to open and shut for second clamping jaw 2, and elastic component 4 is used for reseing of first clamping jaw 1.
The structure of the integrated spring buckle handheld climbing rod device provided by the embodiment is basically the same as that of the integrated spring buckle handheld climbing rod device provided by the embodiment, except that in the embodiment, the connecting rod 3 further comprises an extending part 32 extending out of the first clamping jaw 1 in addition to a connecting part 31 arranged between the first clamping jaw 1 and the second clamping jaw 2, and a worker can realize relative movement between the first clamping jaw 1 and the second clamping jaw 2 by holding the first clamping jaw 1 and the extending part 32 and further realize clamping of a rod to be climbed.
Specifically, the extension portion 32 is formed by extending the connecting portion 31 toward a side away from the center of the first clamping jaw 1, and the connecting portion 31 and the extension portion 32 rotate synchronously around the first pivot shaft 5. Further, the extension portion 32 is bent toward one side of the first clamping jaw 1, so that a worker can conveniently hold the first clamping jaw, and working convenience is improved. The recess 33 of the connecting rod 3 and the anti-slip ring 34 are both arranged on the side of the extension 32 facing away from the first jaw 1. When the worker holds the extension part 32 and rotates the extension part to one side of the first jaw 1, the extension part 32 drives the connecting part 31 to rotate around the first pivot shaft 5, so that the clamping space 100 is increased or decreased to clamp the pole to be climbed.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a pole device is stepped on in handheld lock of integral type bullet, its characterized in that includes:
the clamping device comprises a first clamping jaw (1) and a second clamping jaw (2) which can be opened and closed mutually, wherein the first clamping jaw (1) and the second clamping jaw (2) are both arc-shaped, and a clamping space (100) for clamping a rod to be climbed is formed between the first clamping jaw (1) and the second clamping jaw (2);
the two ends of the connecting rod (3) are hinged to the first clamping jaw (1) and the second clamping jaw (2) respectively, and the connecting rod (3) drives the first clamping jaw (1) to move towards the second clamping jaw (2) through rotation so as to realize opening and closing;
elastic component (4), the both ends of elastic component (4) connect respectively in first clamping jaw (1) with second clamping jaw (2), elastic component (4) are used for second clamping jaw (2) are relative the reseing of first clamping jaw (1).
2. The integrated type elastic buckle handheld climbing pole device according to claim 1, wherein the first clamping jaw (1) is in a major arc shape, the second clamping jaw (2) is in a minor arc shape, and the second clamping jaw (2) is arranged on one side, facing the center of the circle of the first clamping jaw (1), of the first clamping jaw (1).
3. The hand-held pole climbing device with integrated spring clip according to claim 2 is characterized in that the radius of the circular arc of the first clamping jaw (1) and the second clamping jaw (2) is between 100mm and 150 mm.
4. The hand-held climbing pole device of an integrated elastic buckle according to claim 2, wherein the arc length of the first clamping jaw (1) is 500-600 mm, and the arc length of the second clamping jaw (2) is 200-300 mm.
5. The integrated type elastic buckle handheld climbing pole device according to claim 1, wherein the elastic member (4) is an extension spring, two ends of the extension spring are respectively fixed to the first clamping jaw (1) and the second clamping jaw (2), the extension spring is in a normal state when the first clamping jaw (1) and the second clamping jaw (2) are buckled, and the extension spring is in a compressed state when the first clamping jaw (1) and the second clamping jaw (2) are separated.
6. The hand-held pole climbing device with integrated spring clip according to claim 1, wherein the connecting rod (3) comprises a connecting part (31) for holding, and two ends of the connecting part (31) are respectively hinged to the first clamping jaw (1) and the second clamping jaw (2); or the like, or, alternatively,
connecting rod (3) are including fixed connection's connecting portion (31) and extension portion (32), the both ends of connecting portion (31) articulate respectively in first clamping jaw (1) with second clamping jaw (2), extension portion (32) stretch out to one side of the centre of a circle is kept away from in first clamping jaw (1), extension portion (32) are used for gripping.
7. The hand-held pole-climbing device with integral snap rings according to claim 6 is characterized in that the connecting part (31) or the extending part (32) is provided with an anti-slip ring (34) and a plurality of grooves (33) for facilitating holding.
8. The integral snap-action hand-held pole climbing device according to claim 1, characterized in that the connecting rod (3) is made of an insulating material.
9. The integrated spring-catch handheld climbing pole device according to claim 1, wherein the first clamping jaw (1) and the second clamping jaw (2) are both composed of a mutually attached structural layer and a resistance-increasing layer, and the resistance-increasing layer is arranged on the inner side of the structural layer and is used for directly contacting with the pole to be climbed.
10. The hand-held pole-climbing integral snap fastener device of claim 9, wherein the structural layer is made of a high carbon steel material and the resistance-increasing layer is made of a non-slip rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010489539.3A CN111632355B (en) | 2020-06-02 | 2020-06-02 | Handheld pole device of stepping on of integral type bullet knot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010489539.3A CN111632355B (en) | 2020-06-02 | 2020-06-02 | Handheld pole device of stepping on of integral type bullet knot |
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| Publication Number | Publication Date |
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| CN111632355A true CN111632355A (en) | 2020-09-08 |
| CN111632355B CN111632355B (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010489539.3A Active CN111632355B (en) | 2020-06-02 | 2020-06-02 | Handheld pole device of stepping on of integral type bullet knot |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6312364B1 (en) * | 1998-08-19 | 2001-11-06 | Douglas Spriggs Selsam | Blow-moldable water-filled freeweights |
| CN105749499A (en) * | 2016-03-30 | 2016-07-13 | 国网浙江省电力公司岱山县供电公司 | Auxiliary pylon climbing device |
| CN206342869U (en) * | 2016-08-28 | 2017-07-21 | 王建明 | Hand-held climber |
| CN107080923A (en) * | 2017-06-08 | 2017-08-22 | 国网安徽省电力公司亳州供电公司 | Dropproof steps on bar instrument |
| CN108144266A (en) * | 2018-01-04 | 2018-06-12 | 四川省达川中学 | A kind of portable tool of climbing tree |
| CN208694179U (en) * | 2018-08-20 | 2019-04-05 | 广东电网有限责任公司 | Elevating device and equipment of ascending a height |
-
2020
- 2020-06-02 CN CN202010489539.3A patent/CN111632355B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6312364B1 (en) * | 1998-08-19 | 2001-11-06 | Douglas Spriggs Selsam | Blow-moldable water-filled freeweights |
| CN105749499A (en) * | 2016-03-30 | 2016-07-13 | 国网浙江省电力公司岱山县供电公司 | Auxiliary pylon climbing device |
| CN206342869U (en) * | 2016-08-28 | 2017-07-21 | 王建明 | Hand-held climber |
| CN107080923A (en) * | 2017-06-08 | 2017-08-22 | 国网安徽省电力公司亳州供电公司 | Dropproof steps on bar instrument |
| CN108144266A (en) * | 2018-01-04 | 2018-06-12 | 四川省达川中学 | A kind of portable tool of climbing tree |
| CN208694179U (en) * | 2018-08-20 | 2019-04-05 | 广东电网有限责任公司 | Elevating device and equipment of ascending a height |
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| Publication number | Publication date |
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| CN111632355B (en) | 2022-01-18 |
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