Intelligent remote grounding device for digital power transmission line maintenance

Abstract

The invention provides an intelligent remote grounding device for digital transmission line maintenance, and the device comprises a cabin body which is provided with a mounting side and a working side which are opposite to each other, the cabin body is fixed to a target object through a fixing part disposed at the mounting side, and the cabin body is provided with a cabin door for opening or closing an internal accommodation space at the working side; wherein the cabin opening device and the hooking device are arranged in the accommodating space; one end of the cabin opening device is connected with the cabin door, and the other end is connected with the inner wall of the cabin body to adjust the opening of the cabin door; the hooking device is provided with a connecting end and a working end which are opposite, the connecting end is connected with the cabin door, and the working end is provided with a lock catch position used for hooking a wire. The invention solves the technical problems that in the daily power-off maintenance operation process, due to the fact that the grounding wire is frequently used and the operation seems to be simple, a worker is prone to paralyzing thoughts and neglects the importance of correctly hanging the grounding wire, the situation that the grounding wire is frequently used improperly occurs, and the protection effect of the grounding wire is reduced or even fails.

Description

Technical Field

[0001] The present invention relates to the technical field of grounding wires, and in particular to an intelligent remote grounding device for digital power transmission line maintenance. Background Art

[0002] The grounding wire device is the most commonly used safety device by operators during maintenance work. Correct use of this device is an important measure to ensure the safety of maintenance work.

[0003] However, during routine power outage maintenance operations, due to the frequent use of grounding wires and the seemingly simple operation, workers are prone to become complacent and ignore the importance of correctly hanging grounding wires. As a result, improper use of grounding wires often occurs, resulting in reduced or even ineffective protection of the grounding wires. Summary of the Invention

[0004] The technical problem solved by the present invention is that during daily power outage maintenance operations, since grounding wires are frequently used and the operation seems simple, workers tend to become complacent and ignore the importance of correctly hanging the grounding wires. As a result, improper use of grounding wires often occurs, resulting in a reduction in or even failure of the protective effect of the grounding wires.

[0005] In order to solve the above problems, the present invention provides a digital transmission line maintenance intelligent remote grounding device, which includes a cabin, a cabin opening device and a hanging device; The cabin body is provided with an installation side and a working side opposite to each other. The cabin body is fixed to the target object by a fixing member provided on the installation side. The cabin body is provided with a door on the working side for opening or closing the internal storage space. The cabin opening device and the hooking device are provided in the storage space. One end of the hatch opening device is connected to the hatch door, and the other end is connected to the inner wall of the cabin body to adjust the opening of the hatch door; The hanging device is provided with a connecting end and a working end relative to each other, the connecting end is connected to the hatch, and the working end is provided with a locking position for hanging the wire.

[0006] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: the cabin of the digital transmission line maintenance intelligent remote grounding device is installed on the pole tower. When grounding maintenance is required, there is no need to wear safety protective gear, climb the pole tower, and carry the grounding device, which solves the problem of high operational risks.

[0007] In one example of the present invention, a working opening cooperating with the cabin door is provided at the bottom end of the cabin shell; in the direction from the connection end of the cabin door for rotationally connecting with the cabin shell to the open end of the cabin door, the cabin door is sequentially provided with a cabin opening rod connecting plate, a hanging rod support plate, a cabin opening rod mounting plate and a hanging rod fixing plate; the cabin opening rod mounting plate is movably connected to the top inner wall of the cabin shell through a pin shaft; the cabin opening rod connecting plate is connected to one end of the cabin opening device, and the other end of the cabin opening device is connected to the cabin opening rod connecting plate; the hanging device is supported by the hanging rod support plate, and the connecting end is connected to the hanging rod fixing plate.

[0008] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: the cabin of the grounding wire device is installed on the pole tower. When the grounding needs to be inspected, there is no need to wear safety protective gear, climb the pole tower, and carry the grounding device, which solves the problem of high operational risks.

[0009] In one example of the present invention, the cabin door also includes an inspection door and a door lock; the rear end of the cabin shell is provided with an inspection opening for cooperating with the inspection door, and the inspection opening is connected to the accommodating space; the inspection door is rotatably connected to the cabin shell, and the door lock is provided on the inspection door; wherein, when the inspection door closes the inspection opening, the door lock is adjusted to make the inspection door and the cabin shell form a locked state or an unlocked state.

[0010] In one embodiment of the present invention, the cabin opening device includes a flexible shaft and an adjustable cabin opening rod; the flexible shaft is connected to the adjustable cabin opening rod through a tail thread of a sliding connection shaft; the flexible shaft is movably connected to the cabin opening rod connecting plate, and the adjustable cabin opening rod is connected to the cabin opening rod mounting plate.

[0011] In one embodiment of the present invention, the flexible shaft is provided with a first end and a second end relative to each other, the first end is used to be movably connected to the cabin opening rod connecting plate, and the second end is provided with an installation space for assembling the adjustable cabin opening rod; the flexible shaft is also provided with a compression spring A, a copper sleeve A and a nut sleeve installed in the installation space; the nut sleeve is installed at the opening of the installation space; wherein, the sliding connection shaft is threadedly connected to the nut sleeve.

[0012] In one embodiment of the present invention, the working end includes a grounding clamp, and the connecting end includes an adjustable hanging rod; the grounding clamp is screwed to the adjustable hanging rod; a telescopic structure is provided in the adjustable hanging rod to adjust the length of the grounding clamp extending out of the cabin door.

[0013] In one embodiment of the present invention, the grounding clamp includes a grounding hook housing, a braided soft copper wire, a torsion spring, an elastic cylindrical cotter pin, a grounding soft copper wire, a wire clamp, a grounding hook body, a connecting rod clamp, a cylindrical pin shaft, a transmission connecting shaft, a compression spring B and a copper sleeve B; The grounding hook body is fixed in the grounding hook shell through the slot inside the grounding hook shell; The conductor clamp is connected and fixed inside the grounding hook body through an elastic cylindrical split pin; The torsion spring is fixed inside the grounding hook body through an elastic cylindrical cotter pin; the torsion spring uses the grounding hook body as a fixed contact end and the wire clamping plate as a movable contact end; The connecting rod splint is installed and connected through the cylindrical shaft on the grounding hook body; the transmission connecting shaft passes through the compression spring B and the copper sleeve B in sequence, is installed in the slot of the grounding hook shell, and is connected to the connecting rod splint through the cylindrical pin shaft.

[0014] In one embodiment of the present invention, it further comprises: A driving module is disposed in the accommodation space and is connected to the hatch opening device to drive the hatch opening device to rotate relative to the inner wall. An electronic control module, which is electronically connected to the drive module, the hatch opening device, and the hooking device; The electronic control module is used to control the start or stop of the drive module, and the electronic control module is controlled by the remote terminal; The electronic control module is used to control the extension and retraction of the hatch opening device to adjust the opening angle of the hatch; The electronic control module is used to control the extension and retraction of the hooking device to adjust the length of the working end extending out of the hatch.

[0015] After adopting the technical solution of the present invention, the following technical effects can be achieved: The cabin of the digital transmission line maintenance intelligent remote grounding device is installed on the tower. When grounding needs to be inspected, there is no need to wear safety gear, climb the tower, and carry the grounding device, which solves the problem of high operational risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings to be used in describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts. Figure 1 A schematic structural diagram of a digital transmission line maintenance intelligent remote grounding device provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a cabin provided in an embodiment of the present invention; Figure 3 A schematic structural diagram of a hatch opening device provided in an embodiment of the present invention; Figure 4 A schematic structural diagram of a flexible shaft provided in an embodiment of the present invention; Figure 5 A schematic structural diagram of a hooking device provided in an embodiment of the present invention; Figure 6 A schematic structural diagram of a grounding clamp provided in an embodiment of the present invention.

[0017] Description of reference numerals: 1. Cabin body; 2. Wire; 3. Cabin opening device; 4. Hanging device; 5. Cabin body shell; 6. Mounting bolts; 7. Cabin door; 8. Cabin opening rod connecting plate; 9. Hanging rod support plate; 10. Cabin opening rod mounting plate; 11. Hanging rod fixing plate; 12. Inspection door; 13. Door lock; 14. Flexible shaft; 15. Adjustable cabin opening rod; 17. Compression spring A; 18. Copper sleeve A; 19. Nut sleeve; 20. Sliding connecting shaft; 21. Grounding clamp; 22. Adjustable hanging rod; 23. Grounding hook shell; 24. Braided soft copper wire; 25. Torsion spring; 26. Elastic cylindrical cotter pin; 27. Grounding soft copper wire; 28. Wire clamp; 29. ​​Grounding hook body; 30. Connecting rod clamp; 31. Cylindrical pin shaft; 32. Transmission connecting shaft; 33. Compression spring B; 34. Copper sleeve B. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] See also Figure 1 , which is a structural diagram of a digital transmission line maintenance intelligent remote grounding device provided by an embodiment of the present invention. The digital transmission line maintenance intelligent remote grounding device includes a cabin, a cabin opening device and a hanging device; Combine Figure 2-Figure 6 The cabin body 1 is provided with an installation side and a working side opposite to each other. The cabin body 1 is fixed to the target object by a fixing member provided on the installation side, and the cabin body 1 is provided with a door 7 on the working side for opening or closing the internal accommodation space; wherein, the cabin opening device 3 and the hanging device 5 are provided in the accommodation space; One end of the hatch opening device 3 is connected to the hatch 7, and the other end is connected to the inner wall of the cabin body 1 to adjust the opening of the hatch 7; The hooking device 5 is provided with a connecting end and a working end opposite to each other, wherein the connecting end is connected to the hatch 7 and the working end is provided with a locking position for hanging the wire 2. For example, the fixing member is a mounting bolt 6.

[0020] In one example of the present invention, the bottom end of the cabin shell 5 is provided with a working opening that cooperates with the cabin door 7; in the direction from the connection end of the cabin door 7 for rotationally connecting with the cabin shell 5 to the open end of the cabin door 7, the cabin door 7 is provided with an opening rod connecting plate 8, a hanging rod support plate 99, a cabin opening rod mounting plate 10 and a hanging rod fixing plate 11 in sequence; the cabin opening rod mounting plate 10 is movably connected to the top inner wall of the cabin shell 5 through a pin shaft; the cabin opening rod connecting plate 8 is connected to one end of the cabin opening device 3, and the other end of the cabin opening device 3 is connected to the cabin opening rod connecting plate 8; the hanging device 5 is supported by the hanging rod support plate 9, and the connecting end is connected to the hanging rod fixing plate 11.

[0021] In one example of the present invention, the cabin door 7 also includes an inspection door 12 and a door lock 13; the rear end of the cabin shell 5 is provided with an inspection opening for cooperating with the inspection door 12, and the inspection opening is connected to the accommodating space; the inspection door 12 is rotatably connected to the cabin shell 5, and the door lock 13 is arranged on the inspection door 12; wherein, when the inspection door 12 closes the inspection opening, the door lock 13 is adjusted to make the inspection door 12 and the cabin shell 5 form a locked state or an unlocked state.

[0022] In one example of the present invention, the cabin opening device 3 includes a flexible shaft 14 and an adjustable cabin opening rod 15; the flexible shaft 14 is connected to the adjustable cabin opening rod 15 through the tail thread of the sliding connection shaft 20; the flexible shaft 14 is movably connected to the cabin opening rod connecting plate 8, and the adjustable cabin opening rod 15 is connected to the cabin opening rod mounting plate 10.

[0023] In one embodiment of the present invention, the flexible shaft 14 is provided with a first end and a second end relative to each other, the first end is used to be movably connected to the cabin opening rod connecting plate 8, and the second end is provided with an installation space for assembling the adjustable cabin opening rod 15; the flexible shaft 14 is also provided with a compression spring A17, a copper sleeve A18 and a nut sleeve 19 installed in the installation space; the nut sleeve 19 is installed at the opening of the installation space; wherein, the sliding connecting shaft 20 is screwed to the nut sleeve 19.

[0024] In one embodiment of the present invention, the working end includes a grounding clamp 21, and the connecting end includes an adjustable hanging rod 22; the grounding clamp 21 is screwed to the adjustable hanging rod 22; a telescopic structure is provided in the adjustable hanging rod 22 to adjust the length of the grounding clamp 21 extending out of the hatch 7.

[0025] In one embodiment of the present invention, the grounding clamp 21 includes a grounding hook housing 23, a braided soft copper wire 24, a torsion spring 25, an elastic cylindrical cotter pin 26, a grounding soft copper wire 27, a wire clamp 28, a grounding hook body 29, a connecting rod clamp 30, a cylindrical pin shaft 31, a transmission connecting shaft 32, a compression spring B33, and a copper sleeve B34; The grounding hook body 29 is fixed in the grounding hook housing 23 through a slot inside the grounding hook housing 23; The wire clamp 28 is connected and fixed inside the ground hook body 29 through the elastic cylindrical cotter pin 26; The torsion spring 25 is fixed inside the grounding hook body 29 via an elastic cylindrical cotter pin 26; the torsion spring 25 uses the grounding hook body 29 as a fixed contact end and the wire clamping plate 28 as a movable contact end; The connecting rod clamp 30 is installed and connected through the cylindrical shaft on the grounding hook body 29; the transmission connecting shaft 32 passes through the compression spring B33 and the copper sleeve B34 in sequence, is installed in the slot of the grounding hook housing 23, and is connected to the connecting rod clamp 30 through the cylindrical pin shaft 31.

[0026] In one embodiment of the present invention, it further comprises: A driving module is disposed in the accommodation space and is connected to the hatch opening device 3 to drive the hatch opening device 3 to rotate relative to the inner wall. An electronic control module, which is electrically connected to the drive module, the hatch opening device 3 and the hooking device 4; The electronic control module is used to control the start or stop of the drive module, and the electronic control module is controlled by the remote terminal; The electric control module is used to control the telescopic movement of the hatch opening device 3 to adjust the opening angle of the hatch 7; The electric control module is used to control the telescopic action of the hooking device 5 to adjust the length of the working end extending out of the hatch 7.

[0027] The cabin 1 of the digital transmission line maintenance intelligent remote grounding device is installed on the tower. When grounding needs to be inspected, there is no need to wear safety gear, climb the tower, and carry the grounding device, which solves the problem of high operational risk.

[0028] For the digital transmission line maintenance intelligent remote grounding device, when grounding maintenance is required, only the background operation is required, and workers do not need to perform difficult operations under high-altitude working conditions. The maintenance grounding is completed safely and efficiently, solving the problem of difficult grounding wire hanging. The grounding wire clamp is structurally designed to ensure contact with the conductor 2 in terms of area and shape, solving the problem of poor fit between the grounding device and the conductor 2. In the control system of the grounding clamp 21, the spring structure cooperates with the force measurement control system to provide real-time feedback, thereby solving the problem of weak grounding state perception.

[0029] The digital transmission line maintenance intelligent remote grounding device provided by this invention significantly reduces the number of personnel climbing, carrying, and reliability issues in traditional maintenance processes, solving the problems of insufficient personnel carrying capacity and low maintenance efficiency. Throughout the maintenance process, it fully reduces the risk factor of working conditions, optimizes the uncontrollable factors of personnel and the instability of high-altitude operations, and greatly improves the efficiency of the entire maintenance process, solving the problem of low maintenance efficiency.

[0030] In conjunction with the digital transmission line maintenance intelligent remote grounding device provided in the embodiment of the present invention, the specific operation steps are as follows: Hanging process flow: First, the hatch door 7 is opened by the adjustable hatch opening rod 15 until the grounding hook can be fully extended, and then the adjustable hatch opening rod 15 stops moving; The second step is to extend outwards through the adjustable hook rod 22. When the adjustable hook rod 22 is extended to the maximum length, the adjustable hook rod 22 stops moving; In the third step, the hatch door 7 is further opened downward by the adjustable hatch opening rod 15. When the adjustable hooking rod 22 is extended to its maximum length, the adjustable hooking rod 22 is in contact with the wire 2. When the adjustable hatch opening rod 15 is extended to its maximum length, the adjustable hatch opening rod 15 stops moving, and the hatch door 7 is fully opened. In the fourth step, the adjustable hook rod 22 initiates retraction, allowing the conductor 2 to enter the grounding clamp 21. During this process, the grounding clamp 21 is stretched, and the conductor clamp 28 and the connecting rod clamp 30 are in contact with the conductor 2. The electronic control module determines whether the contact is reliable. If the adjustable hook rod 22 determines that the contact is not in place, the adjustable hook rod 22 continues to retract; otherwise, the adjustable hook rod 22 stops. The grounding operation is completed.

[0031] Demolition process: First, after the maintenance work is completed, the adjustable hook rod 22 begins to extend, and the wire 2 is separated from the grounding clamp 21; when the adjustable hook rod 22 is extended to the maximum length, the action stops; In the second step, the hatch 7 is closed upward by the adjustable hatch opening rod 15, and the adjustable hooking rod 22 is separated from the wire 2 until the hatch 7 is closed to the state where the grounding hook can be fully extended, and the adjustable hatch opening rod 15 stops moving.

[0032] The third step is to retract the adjustable hook rod 22 inwards. When the adjustable hook rod 22 is retracted to the minimum length, the adjustable hook rod 22 stops moving. The fourth step is to close the hatch door 7 by means of the adjustable hatch opening rod 15. When the adjustable hatch opening rod 15 is retracted to a minimum length, the adjustable hatch opening rod 15 stops moving and the hatch door 7 is completely closed.

[0033] To summarize the above assembly and disassembly process: First, the adjustable hatch opening rod 15 in the hatch opening device 3 opens the hatch door 7 until the hook can be fully extended, and then the operation stops. The hooking device 4 begins to operate, and the adjustable hooking rod 22 extends outward. When the adjustable hooking rod 22 reaches its maximum length, the operation stops. Then, the adjustable hatch opening rod 15 in the hatch opening device 3 continues to open the hatch door 7 downward, so that the adjustable hooking rod 22 contacts the conductor 2. When the adjustable hatch opening rod 15 continues to extend to its maximum length, the operation stops. At this time, the adjustable hooking rod 22 begins to retract, so that the conductor 2 is fully attached to the clamp, and the grounding operation is completed.

[0034] Dismantling process: After the grounding operation is completed, the adjustable hook rod 22 begins to extend, and the movement stops when it reaches the maximum length; then the adjustable cabin opening rod 15 closes the cabin door 7 upward until the angle of the cabin door 7 is opened, and the adjustable cabin opening rod 15 stops moving; at this moment, the adjustable hook rod 22 retracts inward, and the movement stops when the adjustable hook rod 22 retracts to the minimum length; finally, the adjustable cabin opening rod 15 closes the cabin door 7.

[0035] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A digital transmission line maintenance intelligent remote grounding device, characterized in that: The digital transmission line maintenance intelligent remote grounding device comprises a cabin (1), a cabin opening device (3) and a hooking device (4); The cabin body (1) is provided with an installation side and a working side opposite to each other, the cabin body (1) is fixed to a target object via a fixing member provided on the installation side, and the cabin body (1) is provided with a door (7) on the working side for opening or closing an internal accommodation space; wherein the cabin opening device (3) and the hanging device (5) are provided in the accommodation space; One end of the hatch opening device (3) is connected to the hatch door (7), and the other end is connected to the inner wall of the cabin body (1) to adjust the opening of the hatch door (7); The hooking device (5) is provided with a connecting end and a working end opposite to each other, the connecting end is connected to the hatch (7), and the working end is provided with a locking position for hanging a wire (2).

2. The digital transmission line maintenance intelligent remote grounding device according to claim 1 is characterized in that: The bottom end of the cabin shell (5) is provided with a working opening that cooperates with the cabin door (7); In a direction from the connection end of the hatch (7) for rotatably connecting with the cabin shell (5) to the opening end of the hatch (7), the hatch door (7) is provided with a hatch opening rod connection plate (8), a hooking rod support plate (9), a hatch opening rod mounting plate (10) and a hooking rod fixing plate (11) in sequence; The cabin opening rod mounting plate (10) is movably connected to the top inner wall of the cabin shell (5) via a pin; The hatch opening rod connecting plate (8) is connected to one end of the hatch opening device (3), and the other end of the hatch opening device (3) is connected to the hatch opening rod connecting plate (8); The hooking device (5) is supported by the hooking rod support plate, and the connecting end is connected to the hooking rod fixing plate (11).

3. The digital transmission line maintenance intelligent remote grounding device according to claim 2 is characterized in that: The cabin door (7) further comprises an inspection door (12) and a door lock (13); The rear end of the cabin shell (5) is provided with an inspection opening for cooperating with the inspection door (12), and the inspection opening is in communication with the accommodation space; The inspection door (12) is rotatably connected to the cabin shell (5), and the door lock (13) is provided on the inspection door (12); When the inspection door (12) closes the inspection opening, the door lock (13) is adjusted so that the inspection door (12) and the cabin shell (5) are in a locked state or an unlocked state.

4. The digital transmission line maintenance intelligent remote grounding device according to claim 1 is characterized in that: The hatch opening device (3) comprises a flexible shaft (14) and an adjustable hatch opening rod (15); The flexible shaft (14) is connected to the adjustable cabin opening rod (15) through a tail thread of a sliding connection shaft (20); The flexible shaft (14) is movably connected to the cabin opening rod connecting plate (8), and the adjustable cabin opening rod (15) is connected to the cabin opening rod mounting plate (10).

5. The digital transmission line maintenance intelligent remote grounding device according to claim 4 is characterized in that: The flexible shaft (14) is provided with a first end and a second end opposite to each other, the first end being used for being movably connected to the hatch opening rod connecting plate (8), and the second end being provided with an installation space for assembling the adjustable hatch opening rod (15); The flexible shaft (14) is further provided with a compression spring A (17), a copper sleeve A (18) and a nut sleeve (19) installed in the installation space; the nut sleeve (19) is installed at the opening of the installation space; Wherein, the sliding connection shaft (20) is threadedly connected to the nut sleeve (19).

6. The digital transmission line maintenance intelligent remote grounding device according to claim 1 is characterized in that: The working end includes a grounding clamp (21), and the connecting end includes an adjustable hook rod (22); The grounding clamp (21) is screwed to the adjustable hook rod (22); A telescopic structure is provided in the adjustable hooking rod (22) to adjust the length of the grounding clamp (21) extending out of the cabin door (7).

7. The digital transmission line maintenance intelligent remote grounding device according to claim 6 is characterized in that: The grounding clamp (21) comprises a grounding hook housing (23), a braided soft copper wire (24), a torsion spring (25), an elastic cylindrical cotter pin (26), a grounding soft copper wire (27), a wire clamp (28), a grounding hook body (29), a connecting rod clamp (30), a cylindrical pin shaft (31), a transmission connecting shaft (32), a compression spring B (33) and a copper sleeve B (34); The grounding hook body (29) is fixed in the grounding hook housing (23) through a slot inside the grounding hook housing (23); The wire clamp (28) is connected and fixed inside the grounding hook body (29) via the elastic cylindrical cotter pin (26); The torsion spring (25) is fixed inside the grounding hook body (29) through the elastic cylindrical cotter pin (26); the torsion spring (25) uses the grounding hook body (29) as a fixed contact end and the wire clamp (28) as a movable contact end; The connecting rod clamp (30) is installed and connected through the cylindrical shaft on the grounding hook body (29); the transmission connecting shaft (32) passes through the compression spring B (33) and the copper sleeve B (34) in sequence, is installed in the card slot of the grounding hook shell (23), and is connected to the connecting rod clamp (30) through the cylindrical pin shaft (31).

8. The digital transmission line maintenance intelligent remote grounding device according to any one of claims 1 to 7, characterized in that: Also includes: a driving module, the driving module being arranged in the accommodation space, the driving module being connected to the hatch opening device (3) and being used to drive the hatch opening device (3) to rotate relative to the inner wall; an electric control module, the electric control module being electrically connected to the drive module, the cabin opening device (3) and the hooking device (4); The electric control module is used to control the start or stop of the driving module, and the electric control module is controlled by a remote terminal; The electric control module is used to control the telescopic action of the hatch opening device (3) to adjust the opening angle of the hatch door (7); The electric control module is used to control the telescopic action of the hooking device (5) to adjust the length of the working end extending out of the hatch (7).

Images