Cover opening and closing device

Abstract

This invention provides a cover opening and closing device, comprising: at least two fixed shafts arranged along the width direction of a cable trench and extending along the length direction of the cable trench; lifting rods extending along the width direction of the cable trench, with the middle portions of at least two lifting rods correspondingly hinged to at least two fixed shafts; a cover plate mating portion provided at the first end of each lifting rod; and a connecting rod extending along the width direction of the cable trench and hinged to the second ends of the at least two lifting rods. When the lifting assembly is in the lifting state, the cover plate mating portion extends upward out of the cable trench; when the lifting assembly is in the retracted state, the cover plate mating portion retracts downward into the cable trench. An electric drive unit is connected to the connecting rod to drive the lifting assembly to switch between the lifting state and the retracted state. The technical solution provided by this application can solve the problem in related technologies where frequent opening and closing of the cover requires significant manpower and time.

Description

Technical Field

[0001] This invention relates to the field of cable trench technology, and more specifically, to a cover opening and closing device. Background Technology

[0002] With the increasing urbanization process in China, electrical circuits are generally laid in cable trenches during urban construction, and the top of the cable trench is covered with a cover plate to protect the cable trench.

[0003] In related technologies, cable trench covers are provided with pry holes to allow construction workers to use a pry bar in conjunction with the pry holes to pry the cable trench cover relative to the cable trench and to move the cable trench cover.

[0004] However, the method of using a pry bar and pry holes to pry and move the cover plate in the relevant technology requires two people to operate in order to move it stably. This makes the working efficiency of this method low, and it will consume a lot of manpower and time when the cover plate needs to be opened and closed frequently. Summary of the Invention

[0005] This invention provides a cover opening and closing device to solve the problem in related technologies that a lot of manpower and time are consumed when the cover needs to be opened and closed frequently.

[0006] This invention provides a cover opening and closing device, comprising: at least two fixed shafts arranged in a cable trench along the width direction, the fixed shafts extending along the length direction of the cable trench, and both ends of the fixed shafts being connectable to the cable trench; a lifting assembly including a connecting rod and at least two lifting rods, the at least two lifting rods extending along the width direction of the cable trench, the middle portions of the at least two lifting rods being hinged to the at least two fixed shafts respectively, the first end of the lifting rods being provided with a cover plate mating portion, the connecting rod extending along the width direction of the cable trench and hinged to the second ends of the at least two lifting rods, the lifting assembly having a lifting state and a retracted state, when the lifting assembly is in the lifting state, the cover plate mating portion can extend upward out of the cable trench, and when the lifting assembly is in the retracted state, the cover plate mating portion can retract downward into the cable trench; and an electric drive unit disposed on the side wall of the cable trench, the electric drive unit being drivenly connected to the connecting rod to drive the lifting assembly to switch between the lifting state and the retracted state.

[0007] Furthermore, the electric drive unit includes: a cylinder extending along the width direction of the cable trench, one end of which is movably connected to the cable trench; and a telescopic rod telescopically mounted on the cylinder along its extension direction, the end of the telescopic rod opposite to the cylinder being driven to a connecting rod to drive the lifting assembly to switch between a lifting state and a retracted state.

[0008] Furthermore, the cover opening and closing device also includes a cable trench mounting component, which can be installed on the wall of the cable trench, and one end of the cylinder is connected to the cable trench mounting component.

[0009] Furthermore, the cylinder body is inclined along the depth direction of the cable trench in the width direction, one end of the cylinder body is hinged to the cable trench mounting component, the hinge axis between the cylinder body and the cable trench mounting component extends along the length direction of the cable trench, and the end of the telescopic rod opposite to the cylinder body is hinged to the connecting rod.

[0010] Furthermore, the cable trench installation component includes a fixed groove plate and a slider. The fixed groove plate extends along the depth direction of the cable trench, and the slider is movably mounted on the fixed groove plate along the extension direction of the fixed groove plate. One end of the cylinder is connected to the slider, and the end of the telescopic rod opposite to the cylinder is hinged to the connecting rod.

[0011] Furthermore, the cable trench mounting component also includes a reset component, which is disposed between the slider and the fixed groove plate to apply a reset force to the slider to move towards the groove opening of the fixed groove plate.

[0012] Furthermore, the cable cover has a maintenance opening corresponding to the electric drive component, and the cover opening and closing device also includes a baffle plate, which is detachably and closably disposed at the maintenance opening.

[0013] Furthermore, the cover opening and closing device also includes: a sealing ring, which surrounds the outer edge of the cover and is connected to the cover to seal the gap between the cover and the maintenance opening; and / or, a safety lock, which is disposed between the cover and the cable cover, the safety lock having a protective state of locking the cover and the cable cover and a maintenance state that allows the cover to be opened and closed.

[0014] Furthermore, the lifting rod includes a bent rod, which includes a first rod segment and a second rod segment connected to each other and arranged at an angle. The connection between the first rod segment and the second rod segment is hinged to a fixed shaft. The cover plate mating part is located at the end of the first rod segment opposite to the second rod segment. The connecting rod is hinged to the end of the second rod segment opposite to the first rod segment.

[0015] Furthermore, the cover opening and closing device includes at least two lifting components arranged along the length of the cable trench, and an electric drive unit is driven to the linkage of the at least two lifting components; and / or, the cover mating part includes a cover mounting block and a hinge shaft, the cover mounting block being able to connect to the lower surface of the cable trench cover, and the hinge shaft extending along the length of the cable trench with a first end of the lifting rod provided thereon, the hinge shaft being hinged to the cover mounting block.

[0016] According to the technical solution of this invention, the cover opening and closing device includes a lifting assembly, an electric drive unit, and at least two fixed shafts. When it is necessary to open or close the cable trench cover, the electric drive unit drives the connecting rod to move, so that the connecting rod applies torque to the second end of the lifting rod, causing the lifting rod to rotate around the fixed shaft. This causes the first end of the lifting rod to drive the cable trench cover to move up and down through the cover mating part to realize the opening and closing of the cable trench cover. In this process, since the connecting rod can drive at least two lifting rods to rotate, the cable trench cover is opened and closed using at least two lifting rods, increasing the force points of the cable trench cover. Furthermore, the electric drive unit provides power to realize the opening and closing of the cable trench cover, which can improve operating efficiency and operating safety. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of the cover opening and closing device provided according to an embodiment of the present invention is shown;

[0019] Figure 2 A top view of a cover opening and closing device provided according to an embodiment of the present invention is shown.

[0020] The above figures include the following reference numerals:

[0021] 1. Cable trench; 2. Cable trench cover;

[0022] 10. Fixed shaft;

[0023] 20. Lifting assembly; 21. Connecting rod; 22. Lifting rod; 221. Cover plate mating part; 2211. Cover plate mounting block; 2212. Hinge shaft; 222. Bending rod; 2221. First rod segment; 2222. Second rod segment;

[0024] 30. Electric drive component; 31. Cylinder block; 32. Telescopic rod;

[0025] 40. Cable trench installation components; 50. Shelter plate; 70. Safety lock;

[0026] X represents the length of the cable trench; Y represents the width of the cable trench. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides a cover opening and closing device, which includes a lifting assembly 20, an electric drive unit 30, and at least two fixed shafts 10. The at least two fixed shafts 10 are arranged in the cable trench 1 along the width direction and extend along the length direction of the cable trench 1. Both ends of the fixed shafts 10 can be connected to the cable trench 1. The lifting assembly 20 includes a connecting rod 21 and at least two lifting rods 22, both of which extend along the width direction of the cable trench 1. The middle portions of the at least two lifting rods 22 are hinged to the at least two fixed shafts 10 respectively. The first end of the rod 22 is provided with a cover plate mating part 221. The connecting rod 21 extends along the width direction of the cable trench 1 and is hinged to the second ends of at least two lifting rods 22. The lifting assembly 20 has a lifting state and a retracted state. When the lifting assembly 20 is in the lifting state, the cover plate mating part 221 can extend upward out of the cable trench 1. When the lifting assembly 20 is in the retracted state, the cover plate mating part 221 can be retracted downward into the cable trench 1. The electric drive unit 30 can be provided on the side wall of the cable trench 1. The electric drive unit 30 is drivenly connected to the connecting rod 21 to drive the lifting assembly 20 to switch between the lifting state and the retracted state.

[0029] The cover opening and closing device provided in this embodiment includes a lifting assembly 20, an electric drive unit 30, and at least two fixed shafts 10. When it is necessary to open or close the cable trench cover, the electric drive unit 30 drives the connecting rod 21 to move, so that the connecting rod 21 applies torque to the second end of the lifting rod 22, causing the lifting rod 22 to rotate around the fixed shaft 10. This causes the first end of the lifting rod 22 to drive the cable trench cover to move up and down through the cover mating part 221 to realize the opening and closing of the cable trench cover. In this process, since the connecting rod 21 can drive at least two lifting rods 22 to rotate, the cable trench cover is opened and closed using at least two lifting rods 22, increasing the force points of the cable trench cover. Furthermore, the electric drive unit 30 provides power to realize the opening and closing of the cable trench cover, which can improve the operating efficiency and operating safety.

[0030] It should be noted that the length direction of cable trench 1 refers to... Figure 2The X-direction marked in the diagram refers to the width direction of cable trench 1. Figure 2 The Y-direction is marked in the middle.

[0031] like Figure 1 and Figure 2 As shown, the electric drive unit 30 includes a cylinder 31 and a telescopic rod 32. The cylinder 31 extends along the width direction of the cable trench 1, and one end of the cylinder 31 can be movably connected to the cable trench 1. The telescopic rod 32 is telescopically mounted on the cylinder 31 along the extension direction of the cylinder 31. The end of the telescopic rod 32 opposite to the cylinder 31 is driven to be connected to the connecting rod 21 to drive the lifting assembly 20 to switch between the lifting state and the retracted state.

[0032] When it is necessary to open or close the cable trench cover, the telescopic rod 32 moves relative to the cylinder 31 along the extension direction of the cylinder 31, so that the connecting rod 21 applies torque to the second end of the lifting rod 22, causing the lifting rod 22 to rotate around the fixed shaft 10, thereby causing the first end of the lifting rod 22 to drive the cable trench cover to move up and down through the cover plate mating part 221 to realize the opening and closing of the cable trench cover.

[0033] like Figure 1 and Figure 2 As shown, the cover opening and closing device also includes a cable trench mounting component 40, which can be installed on the wall of the cable trench 1. One end of the cylinder body 31 is connected to the cable trench mounting component 40. By using the cable trench mounting component 40 described above, and by installing the cable trench mounting component 40 on the wall of the cable trench 1, it is convenient to install the cylinder body 31 inside the cable trench 1.

[0034] Specifically, the "cable trench mounting component 40 is installed on the wall of cable trench 1" has the following two embodiments:

[0035] (1) The cable trench installation component 40 is fixedly installed on the wall of the cable trench 1. One end of the cylinder is hinged to the cable trench installation component. The hinge axis between the cylinder and the cable trench installation component extends along the length of the cable trench. The end of the telescopic rod away from the cylinder is hinged to the connecting rod. The cylinder is inclined along the depth of the cable trench in the width direction of the cable trench.

[0036] (2) The cable trench installation component includes a fixed groove plate and a slider. The fixed groove plate is fixedly installed on the wall of the cable trench and extends along the depth direction of the cable trench. The slider is movably set on the fixed groove plate along the extension direction of the fixed groove plate. One end of the cylinder is connected to the slider, and the end of the telescopic rod away from the cylinder is hinged to the connecting rod.

[0037] In this embodiment, as Figure 1 and Figure 2As shown, the cylinder 31 is inclined along the depth direction of the cable trench 1 in the width direction. One end of the cylinder 31 is hinged to the cable trench mounting component 40. The hinge shaft 2212 between the cylinder 31 and the cable trench mounting component 40 extends along the length direction of the cable trench 1. The end of the telescopic rod 32 facing away from the cylinder 31 is hinged to the connecting rod 21. When it is necessary to open or close the cable trench cover, the telescopic rod 32 moves relative to the cylinder 31 along the extension direction of the cylinder 31. At this time, the telescopic rod 32 applies a reaction force to the cylinder 31 to drive the cylinder 31 to swing relative to the cable trench mounting component 40, and causes the connecting rod 21 to apply torque to the second end of the lifting rod 22, causing the lifting rod 22 to rotate around the fixed shaft 10. This causes the first end of the lifting rod 22 to drive the cable trench cover to move up and down through the cover plate mating part 221 to realize the opening and closing of the cable trench cover.

[0038] In other embodiments, the cable trench mounting component 40 includes a fixed groove plate and a slider. The fixed groove plate extends along the depth direction of the cable trench 1, and the slider is movably mounted on the fixed groove plate along the extension direction of the fixed groove plate. One end of the cylinder 31 is connected to the slider, and the end of the telescopic rod 32 opposite to the cylinder 31 is hinged to the connecting rod 21. When it is necessary to open or close the cable trench cover, the telescopic rod 32 moves relative to the cylinder 31 along the extension direction of the cylinder 31. At this time, the telescopic rod 32 applies a reaction force to the cylinder 31, so that the cylinder 31 drives the slider to move along the extension direction of the fixed groove plate, and causes the connecting rod 21 to apply torque to the second end of the lifting rod 22, so that the lifting rod 22 rotates around the fixed shaft 10, thereby causing the first end of the lifting rod 22 to drive the cable trench cover to move up and down through the cover plate mating part 221 to realize the opening and closing of the cable trench cover.

[0039] Specifically, the cable trench mounting component 40 also includes a reset component, which is disposed between the slider and the fixed slot plate to apply a reset force to the slider to move towards the slot opening of the fixed slot plate. By using the reset component disposed between the slider and the fixed slot plate to apply a reset force to the slider to move towards the slot opening of the fixed slot plate, it is convenient for the slider to move upward and reset when the electric drive component 30 is unloaded.

[0040] like Figure 1 and Figure 2 As shown, the cable cover has a maintenance opening corresponding to the electric drive unit 30, and the cover opening and closing device also includes a baffle plate 50, which is detachably and closably disposed at the maintenance opening.

[0041] When the electric drive component 30 needs to be inspected, the shield 50 is opened to allow inspection through the maintenance port. When the internal structure of the cable trench 1 does not need to be inspected, the maintenance port is closed using the shield 50 to protect the electric drive component 30.

[0042] like Figure 1 and Figure 2As shown, the cover opening and closing device also includes a sealing ring, which surrounds the outer edge of the baffle 50 and is connected to the baffle 50 to seal the gap between the baffle 50 and the maintenance port.

[0043] The sealing ring is used to surround the outer edge of the shield 50 and connect to the shield 50 to seal the gap between the shield 50 and the maintenance opening, which can prevent water or small animals from entering the cable trench 1 through the gap between the shield 50 and the maintenance opening and causing damage.

[0044] like Figure 1 and Figure 2 As shown, the cover opening and closing device also includes a safety lock 70, which is disposed between the shield 50 and the cable cover. The safety lock 70 has a protective state of locking the shield 50 and the cable cover, and a maintenance state that allows the shield 50 to be opened and closed. When there is no need to inspect the internal structure of the cable trench 1, the safety lock 70 is used to lock the shield 50 and the cable cover to prevent unauthorized personnel from opening the shield 50 at will, thereby improving the protective reliability of the shield 50.

[0045] like Figure 1 and Figure 2 As shown, the lifting rod 22 includes a bent rod 222, which includes a first rod segment 2221 and a second rod segment 2222 connected to each other and arranged at an angle. The connection between the first rod segment 2221 and the second rod segment 2222 is hinged to the fixed shaft 10. The cover plate mating part 221 is provided at one end of the first rod segment 2221 away from the second rod segment 2222. The connecting rod 21 is hinged to one end of the second rod segment 2222 away from the first rod segment 2221.

[0046] By connecting the first rod segment 2221 and the second rod segment 2222 at an angle, and keeping the lengths of the first rod segment 2221 and the second rod segment 2222 unchanged, the size of the lifting rod 22 in the width direction of the cable trench is reduced, making the cover opening and closing device compact and helping to achieve structural miniaturization.

[0047] In this embodiment, the length of the second rod segment 2222 is greater than the length of the first rod segment 2221, so that the lifting rod 22 forms a lever structure. According to the lever principle, when a driving force is applied to the long arm end of the lever structure (i.e. the end of the second rod segment 2222 that is away from the first rod segment 2221), the short arm end of the lever structure (i.e. the end of the first rod segment 2221 that is away from the second rod segment 2222) can output a force greater than the driving force, thereby achieving the effect of saving effort.

[0048] In this embodiment, the second rod segment 2222 adopts an arc-shaped structure, and the middle part of the second rod segment 2222 protrudes in a direction away from the first rod segment 2221, making the movement trajectory of the lifting rod 22 smoother and reducing movement resistance.

[0049] like Figure 1 and Figure 2 As shown, the cover opening and closing device includes at least two lifting components 20 arranged along the length of the cable trench 1, and an electric drive unit 30 is driven to connect the connecting rods 21 of the at least two lifting components 20.

[0050] Since the electric drive unit 30 is driven to connect with the connecting rod 21 of at least two lifting components 20, the cable trench cover is opened and closed by using at least two lifting components 20, which increases the force points of the cable trench cover. Thus, only one electric drive unit 30 needs to perform one action to drive at least two lifting components 20 to realize the opening and closing of the cable trench cover, saving the number of drive components and simplifying the drive action.

[0051] like Figure 1 and Figure 2 As shown, the cover plate mating part 221 includes a cover plate mounting block 2211 and a hinge shaft 2212. The cover plate mounting block 2211 can be connected to the lower surface of the cable trench cover 2. The hinge shaft 2212 extends along the length direction of the cable trench 1 and has the first end of the lifting rod 22 provided therein. The hinge shaft 2212 is hinged to the cover plate mounting block 2211. With the cover plate mating part 221 having the above structure, the cover plate mounting block 2211 is connected to the lower surface of the cable trench cover 2, which can further prevent the cable trench cover from falling off and improve operational safety.

[0052] The cover opening and closing device provided in this embodiment has the following beneficial effects:

[0053] (1) Increase the force-bearing points of the cable trench cover, so that only one electric drive unit 30 needs to perform one action to drive at least two lifting components 20 to realize the opening and closing of the cable trench cover, saving the number of drive components and simplifying the drive action.

[0054] (2) The lifting rod 22 is based on the lever principle and has the effect of saving effort.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0057] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0058] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0059] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cover opening and closing device, characterized in that, The cover opening and closing device includes: At least two fixed shafts (10) are arranged in the cable trench (1) in a way that is oriented along the width direction of the cable trench (1). The fixed shafts (10) extend along the length direction of the cable trench (1), and both ends of the fixed shafts (10) are connected to the cable trench (1). The lifting assembly (20) includes a connecting rod (21) and at least two lifting rods (22). The at least two lifting rods (22) extend along the width direction of the cable trench (1). The middle parts of the at least two lifting rods (22) are hinged to at least two fixed shafts (10) in a corresponding manner. The first end of the lifting rod (22) is provided with a cover plate mating part (221). The connecting rod (21) extends along the width direction of the cable trench (1) and is hinged to the second end of the at least two lifting rods (22). The lifting assembly (20) has a lifting state and a retracted state. When the lifting assembly (20) is in the lifting state, the cover plate mating part (221) can extend upward out of the cable trench (1). When the lifting assembly (20) is in the retracted state, the cover plate mating part (221) can be retracted downward into the cable trench (1). An electric drive unit (30) can be installed on the side wall of the cable trench (1), and the electric drive unit (30) is driven to be connected to the connecting rod (21) to drive the lifting assembly (20) to switch between the lifting state and the storage state; The lifting rod (22) includes a bent rod (222), which includes a first rod segment (2221) and a second rod segment (2222) connected to each other and arranged at an angle. The connection between the first rod segment (2221) and the second rod segment (2222) is hinged to the fixed shaft (10). The cover plate mating part (221) is provided at the end of the first rod segment (2221) away from the second rod segment (2222). The connecting rod (21) is hinged to the end of the second rod segment (2222) away from the first rod segment (2221). The cover opening and closing device includes at least two lifting assemblies (20) arranged along the length of the cable trench (1), and the electric drive unit (30) is drivenly connected to the connecting rods (21) of the at least two lifting assemblies (20); and / or, The cover plate mating part (221) includes a cover plate mounting block (2211) and a hinge shaft (2212). The cover plate mounting block (2211) can be connected to the lower surface of the cable trench cover (2). The hinge shaft (2212) extends along the length direction of the cable trench (1) and the first end of the lifting rod (22) is provided. The hinge shaft (2212) is hinged to the cover plate mounting block (2211).

2. The cover opening and closing device according to claim 1, characterized in that, The electric drive unit (30) includes: A cylinder (31) extends along the width direction of the cable trench (1), and one end of the cylinder (31) is movably connected to the cable trench (1); A telescopic rod (32) is telescopically mounted on the cylinder (31) along the extension direction of the cylinder (31). One end of the telescopic rod (32) away from the cylinder (31) is driven to be connected to the connecting rod (21) to drive the lifting assembly (20) to switch between the lifting state and the storage state.

3. The cover opening and closing device according to claim 2, characterized in that, The cover opening and closing device also includes a cable trench mounting component (40), which can be installed on the wall of the cable trench (1), and one end of the cylinder (31) is connected to the cable trench mounting component (40).

4. The cover opening and closing device according to claim 3, characterized in that, The cylinder (31) is inclined along the depth direction of the cable trench (1) in the width direction. One end of the cylinder (31) is hinged to the cable trench mounting part (40). The hinge shaft (2212) between the cylinder (31) and the cable trench mounting part (40) extends along the length direction of the cable trench (1). The end of the telescopic rod (32) away from the cylinder (31) is hinged to the connecting rod (21).

5. The cover opening and closing device according to claim 3, characterized in that, The cable trench mounting component (40) includes a fixed groove plate and a slider. The fixed groove plate extends along the depth direction of the cable trench (1). The slider is movably mounted on the fixed groove plate along the extension direction of the fixed groove plate. One end of the cylinder (31) is connected to the slider. The end of the telescopic rod (32) opposite to the cylinder (31) is hinged to the connecting rod (21).

6. The cover opening and closing device according to claim 5, characterized in that, The cable trench mounting component (40) further includes a reset component disposed between the slider and the fixed groove plate to apply a reset force to the slider to move toward the groove opening of the fixed groove plate.

7. The cover opening and closing device according to claim 1, characterized in that, The cable cover has a maintenance opening corresponding to the electric drive unit (30), and the cover opening and closing device further includes a baffle plate (50), which is openable and closable at the maintenance opening.

8. The cover opening and closing device according to claim 7, characterized in that, The cover opening and closing device also includes: A sealing ring, surrounding the outer edge of the baffle (50) and connected to the baffle (50), to seal the gap between the baffle (50) and the maintenance opening; and / or, A safety lock (70) is disposed between the shield (50) and the cable cover, the safety lock (70) having a protective state for locking the shield (50) and the cable cover and a maintenance state for allowing the shield (50) to be opened and closed.

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