Precise docking of electric heavy truck catenary automatic capture of bow rod and its application

Abstract

The present application relates to the technical field of rail transit electrical equipment, in particular to an electric heavy truck contact net automatic capture bow rod with precise butt joint and its application, comprising a sliding plate installed on the top of a support, a pair of conductive groups are slidingly connected on the top surface of the sliding plate, the conductive groups are composed of a pair of graphite balls in transverse proximity, used for supporting and contacting the conductor, a reversing group is arranged on the top surface of the sliding plate, used for receiving wind force to automatically adjust the graphite ball reversing contact with the conductor; the reversing group is composed of a reversing rod arranged on the bottom surface of each pair of graphite balls and a fan wheel for controlling the rotation of the two reversing rods, the fan wheel and the reversing rod transmit the wind power through a gear. The present application achieves the technical effects of uniform wear on the surface of the graphite ball and significantly prolonged replacement and maintenance period by setting the clamping piece to press and clamp the graphite ball, rolling friction of the graphite ball with the conductor in transverse proximity, and driving the graphite ball to continuously reverse rotation by the reversing group receiving wind force, completing the dynamic change of the contact surface of the graphite ball and the conductor.

Description

Technical Field

[0001] This invention relates to the field of rail transit electrical equipment technology, specifically to an automatic capture pantograph for precise docking of the overhead contact line of an electric heavy-duty truck and its application. Background Technology

[0002] In the overhead contact line power supply system of electric heavy-duty trucks, the pantograph, as a key component connecting the vehicle and the power grid, directly affects the stability of current collection and the service life of the equipment due to the rationality of its structural design. Existing pantographs mostly use a fixed graphite slider that slides in contact with the conductor for conductivity. Patent application CN202321434555.8 discloses a dual-head pantograph configuration for new energy heavy-duty trucks, including a frame, two lifting mechanisms, and two contact heads. The bottom ends of the two lifting mechanisms are fixed adjacently to the frame; the two contact heads are respectively fixed to the top ends of the two lifting mechanisms. By designing two lifting mechanisms to drive the two pantograph heads to rise and fall respectively, and since the two pantograph heads are electrically connected to the positive and negative wires of the power grid charging line and the positive and negative charging lines of the power supply device for new energy heavy trucks, a complete power circuit is formed. This avoids the need for additional components of new energy heavy trucks to be connected to the ground, thus improving the driving safety of new energy heavy trucks. At the same time, the independent raising and lowering of the two pantograph heads can adapt to situations where the positive and negative wires in the contact wire are far apart, thereby improving the adaptability of the dual-head pantograph configuration.

[0003] Existing patents, such as the one with application number CN202321434555.8, propose a dual-head pantograph configuration that adapts to changes in the spacing between the positive and negative wires through independent lifting. However, this solution primarily addresses the adaptability between the upper and lower wires, and does not provide an effective solution for the spacing changes and uniform wear issues caused by wear during contact with a single wire. This structure presents the following problems in practical applications: First, the long-term unidirectional sliding friction between the graphite slider and the wire easily leads to severe localized wear on the slider, shortening the replacement cycle and increasing maintenance costs. Second, while adjusting the horizontal friction range with the graphite slider by laying the power grid charging cable in a zigzag pattern solves the problem of localized wear, it also introduces inconvenience and increased costs associated with laying the power cable. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention aims to provide an automatic capture arm for precise docking of the contact network of electric heavy trucks and its application. It utilizes two pairs of graphite balls to clamp the positive and negative power grid wires in rolling friction contact, reducing wear. At the same time, each pair of graphite balls can slide laterally without the need for winding the power lines, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides an automatic capture bow for precise docking of the contact wire of an electric heavy truck, including a slide plate installed on the top of a bracket. A pair of conductive groups are slidably connected to the top surface of the slide plate. The conductive groups are composed of a pair of graphite balls that are laterally close together and used to support the conductor and make contact with the conductor. A reversing group is provided on the top surface of the slide plate to receive wind force and automatically adjust the graphite balls to reverse the contact with the conductor. Each pair of graphite spheres has several clamping components attached to their opposite sides near each other. A slide is provided below each pair of graphite spheres. The outer ends of the clamping components are fixedly connected to support rods that are slidably connected to the top surface of the slide. A pair of threaded rods are threaded between the bottoms of the two support rods, and the threads of the two threaded rods are arranged in opposite directions. A vision sensor is provided below each pair of graphite spheres near each other to monitor the gap size in real time and provide feedback to the microprocessor to control the servo motor to drive the two threaded rods to rotate, thereby controlling the two support rods to adjust the gap of the pair of graphite spheres and ensuring that it is less than the outer diameter of the wire. The graphite spheres undergo rolling friction within the clamping components, thus the graphite spheres and the wires undergo rolling friction. In addition, the slide supports the pair of graphite spheres to slide horizontally on the top surface of the slide plate, naturally adapting to the zigzag swing path of the wires generated when the vehicle swings, preventing hard compression that could cause the graphite spheres to break.

[0006] The reversing assembly consists of a reversing rod placed on the bottom surface of each pair of graphite spheres and a fan impeller controlling the rotation of the two reversing rods. The fan impeller is located at the center of the top surface of the slide plate and is vertically oriented. The fan impeller and the reversing rod transmit wind power through gears. The reversing assembly operates under the wind force from the front of the vehicle. Generally, electric heavy trucks travel at a speed of 80-100 km / h, at which time the frontal wind force can reach level 8-10, with stable wind direction and sufficient wind force. In addition, the wire and the graphite spheres undergo rolling friction, which ensures that the graphite spheres and wires roll in contact and rotate horizontally while the friction surface changes due to the wind force.

[0007] As a further improvement to this technical solution, the clamping component is integrally composed of a curved shell and a straight plate. The curved shell is fitted and snapped into the central annular surface of the graphite sphere. Several clamping components are hinged to each other with a backing plate. Several springs are provided in a ring at equal intervals on the outer side of the backing plate. The central axis of the spring points perpendicularly to the central axis of the backing plate, and the outer end of the spring is embedded in the side wall of the straight plate of the clamping component. Experimental tests and calculations show that the elastic force of the spring is less than the crushing force of the graphite sphere. In addition, the wire and the graphite sphere are in rolling contact friction, unlike the traditional horizontal graphite sliding plate and wire squeezing friction. This means that the clamping component does not need to have a large clamping force to limit the graphite sphere. The graphite sphere is reinforced with graphite-based composite materials to resist being crushed by the clamping component, such as C / C-graphite / Cu or powder metallurgy materials with added copper, nickel, and other metals.

[0008] As a further improvement to this technical solution, a pair of guide rails are fixedly installed on the center line of the top surface of the slide plate along its length. The slide table is matched and engaged with the guide rails and slides. The support rod is L-shaped and has an directional groove on the center line of its horizontal section. A pair of pins are embedded in the top surface of the slide table near the center, and the pins are slidably inserted into the directional groove.

[0009] As a further improvement to this technical solution, the outer end of the horizontal section of the support rod is provided with a connecting platform, and the side of the connecting platform is provided with a threaded hole and is threadedly connected to the threaded rod.

[0010] As a further improvement to this technical solution, a worm gear is tightly fitted near the end of a pair of threaded rods, and the outer end of the output shaft of the servo motor is coaxially connected to a worm that meshes with the worm gear.

[0011] As a further improvement to this technical solution, an arc groove is provided at the center of the side of the back plate, and the arc groove is adapted to be snapped into the graphite ball. A connecting sleeve is provided in the middle of the other side of the back plate for connecting and fixing with the top of the support rod.

[0012] As a further improvement to this technical solution, a protective cover is provided on the center of the top surface of the slide, and a vision sensor is embedded in the top surface of the protective cover.

[0013] As a further improvement to this technical solution, the outer wall of the reversing rod is fitted with a rubber sleeve, the bottom end of the central shaft of the impeller is coaxially connected with a main bevel gear, and one end of the reversing rod is tightly fitted with a secondary bevel gear that meshes with the main bevel gear.

[0014] As a further improvement to this technical solution, support plates are sleeved at both ends of the reversing rod, and the support plates are fixed to the end face of the guide rail by bolts.

[0015] The application of the precisely aligned electric heavy-duty truck contact network automatic capture pantograph provided by this invention is the application of the aforementioned precisely aligned electric heavy-duty truck contact network automatic capture pantograph in the electric contact traction of rail transit.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The electric heavy-duty truck contact network automatic capture arch and its application, by setting up a clamping component with an embedded spring to press and clamp graphite balls, a pair of graphite balls approaching each other laterally and rolling against the conductor instead of traditional sliding friction, and by receiving wind power through the reversing group to drive the graphite balls to continuously change direction and rotate, the contact surface between the graphite balls and the conductor is dynamically changed, achieving the technical effect of uniform wear on the surface of the graphite balls and significantly extending the replacement and maintenance cycle.

[0017] 2. The automatic capture arch rod of the electric heavy truck contact network with precise docking and its application are achieved by connecting a pair of reverse threaded rods between the bottom of two support rods and using a vision sensor to monitor the gap size of a pair of graphite balls in real time. The microprocessor controls the servo motor to drive the threaded rods to rotate, thereby completing the automatic adjustment of the gap between the two graphite balls. This achieves the technical effect of ensuring that the gap always adapts to the outer diameter of the conductor and that the conductor is stably supported and contacted.

[0018] 3. The electric heavy-duty truck contact wire automatic capture bow and its application: by setting an I-shaped guide rail on the top surface of the slide plate to match the sliding table, and adopting a directional groove sliding insertion structure between the support rod and the sliding table, a pair of graphite balls can be freely slid and precisely guided in the lateral direction. This achieves the technical effect of adapting to the left and right deviation of the vehicle in a single lane while ensuring that the conductor is always located between the two balls.

[0019] 4. The invention relates to the automatic capture arm of the electric heavy-duty truck contact network and its application. By adopting a gear transmission structure of wind turbine and reversing rod, and designing the outer diameter of the main bevel gear to be smaller than that of the secondary bevel gear to form a speed reduction transmission, the invention achieves efficient utilization of wind power and slow and stable rotation of the reversing rod, thus achieving the technical effect of driving the graphite ball to commutate uniformly without additional power and saving energy. Attached Figure Description

[0020] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, will select various possible shapes and proportions to implement the invention according to specific circumstances.

[0021] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention; Figure 2 This is the overall front view of the present invention; Figure 3 This is an overall top view of the present invention; Figure 4 This is a schematic diagram of the assembly structure of a pair of conductive groups and a commutation group according to the present invention; Figure 5 This is one of the partial exploded views of the conductive group of the present invention; Figure 6 This is a second partial exploded view of the conductive assembly of the present invention; Figure 7 This is a schematic diagram of the commutator assembly structure of the present invention; The meanings of the labels in the diagram are as follows: 100. Stand; 110. Skateboard; 120. Guide rail; 200. Conductive assembly; 210. Graphite ball; 220. Clamping component; 221. Spring; 222. Backing plate; 223. Arc groove; 224. Connecting sleeve; 230. Slide table; 231. Protective cover; 240. Support rod; 241. Connecting platform; 242. Orientation groove; 250. Threaded rod; 251. Worm gear; 260. Servo motor; 270. Vision sensor; 300. Reversing assembly; 310. Reversing rod; 311. Support plate; 320. Fan impeller; 330. Main bevel gear; 340. Secondary bevel gear. Detailed Implementation

[0022] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art will conceive of any possible variations of the invention, all of which should be considered within the scope of the invention. The terms "installation" and "connection" should be interpreted broadly, referring to direct connection as well as indirect connection through an intermediate medium.

[0023] The terms "central axis," "vertical," "horizontal," "front," "rear," "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" used herein to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and are not intended to 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 of the invention. Furthermore, in the description of the invention, "a number" means two or more, unless otherwise explicitly specified.

[0024] Please see Figures 1-6As shown, this invention provides an automatic capture pantograph for precise docking of electric heavy-duty truck contact networks, which is applied in electric contact traction in rail transit. It includes a slide plate 110 mounted on top of a bracket 100. A pair of conductive groups 200 are slidably connected to the top surface of the slide plate 110. The conductive groups 200 are composed of a pair of graphite balls 210 arranged laterally close together to support the conductors and achieve contact conductivity. Wires are then led out from below the slide plate 110 to the electric heavy-duty truck contact network for energization. The two pairs of graphite balls 210 are respectively connected to the positive and negative terminals of the power grid charging conductors and the positive and negative charging terminals of the new energy electric heavy-duty truck power supply device. The electrical connection forms a complete power-carrying circuit. This power-carrying method is existing technology and will not be described in detail here. A reversing assembly 300 is provided on the top surface of the slide plate 110 to automatically adjust the reversing contact wire of the graphite ball 210 by receiving wind force. When the electric heavy truck is in motion, the reversing assembly 300 works due to the wind force from the front. The general speed of the electric heavy truck is 80-100km / h. At this time, the front wind force can reach level 8-10, which allows the graphite ball 210 to continuously reverse direction when it rolls and rubs against the wire, so as to ensure that the graphite ball 210 wears evenly and has a longer replacement and maintenance cycle.

[0025] Specifically, a pair of graphite spheres 210 are fitted with several clamping parts 220 on their opposite sides near each other. This engagement allows the conductor of the external power grid to be supported and made conductive when placed between the pair of graphite spheres 210 near each other. A slide table 230 is provided below the pair of graphite spheres 210. A pair of guide rails 120 are fixedly installed on the center line of the top surface of the slide plate 110 along its length. The guide rails 120 are I-shaped tracks. The slide table 230 is matched and engaged with the guide rails 120 and slides, which serves to limit and guide the sliding. The outer end of the clamping part 220 is fixedly connected to a support rod 240 that slides on the top surface of the slide table 230. That is, the support rod 240 supports the clamping part 220 and the graphite spheres 210 above the slide table 230 and slides freely on the guide rails 120 with the slide table 230. In this way, the pair of graphite spheres 210 will support the left and right displacement of the conductor, adapting to the fault tolerance range of lateral displacement of the vehicle during driving, which is conducive to achieving synchronous conductivity when the electric heavy truck shifts left and right within a fixed single lane. Because the conductor is always supported by a pair of graphite balls 210, and the pair of graphite balls 210 can move laterally in a single lane to adapt to the vehicle's deviation, there is no need to lay the conductor in a winding manner, which saves on the difficulty and cost of paving.

[0026] Since the two graphite balls 210 will shrink and increase their spacing due to wear with the wire, and considering that the outer diameter of the wire remains constant, the spacing between the two graphite balls 210 needs to be adjusted to always support the wire and achieve contact conductivity. A pair of threaded rods 250 are threaded between the bottoms of the two support rods 240, with opposite thread directions and coaxial connection. Rotation allows the support rods 240 on the two threaded rods 250 to move in opposite directions, thereby adjusting the spacing between the two graphite balls 210. A vision sensor 270 is preferably located below the pair of graphite balls 210 near each other. An industrial camera is used to monitor the gap size in real time. For example, an industrial camera is installed on the side between two graphite spheres 210 to capture a side view containing the two spheres and the wire. The monitoring principle is that the image algorithm identifies the outline of the two spheres and the position of the wire in real time. The gap size is determined by calculating the actual center distance of the spheres and edge detection to deduce the sphere radius, i.e. the degree of wear. The microprocessor controls the servo motor 260 to drive the two threaded rods 250 to rotate, which in turn controls the two support rods 240 to drive the pair of graphite spheres 210 to adjust the gap and ensure that it is smaller than the outer diameter of the wire, so that the pair of graphite spheres 210 can always support the wire.

[0027] Furthermore, the clamping member 220 is integrally composed of a curved shell and a straight plate, for example, by welding. The components of the conductive assembly 200, the slide plate 110, and the guide rail 120 are all made of conductive metal, such as aluminum alloy, which is both conductive and rust-free. The curved shell is adapted to and snapped into the central annular surface of the graphite ball 210, thereby clamping the graphite ball 210 and allowing it to roll within the clamping members 220. A backing plate 222 is hinged between the clamping members 220. A number of springs 221 are provided in a ring at equal intervals on the outer side of the backing plate 222. The central axis of the springs 221 points perpendicularly to the central axis of the backing plate 222, and the outer end of the springs 221 is embedded in the side wall of the straight plate of the clamping member 220. The springs 221 use their rebound force to press the straight plate of the clamping member 220, causing the curved shell to clamp the graphite ball 210, which is constantly being worn down. When the diameter of the graphite ball 210 is detected by the vision sensor 270 to be less than a threshold, a replacement and maintenance reminder is given.

[0028] Furthermore, the support rod 240 is L-shaped, and a directional groove 242 is formed on the center line of the top surface of its horizontal section. A pair of pins are embedded in the top surface of the slide table 230 near the center. The pins are slidably inserted into the directional groove 242, so that the support rod 240 drives the graphite balls 210 to slide stably. A connecting platform 241 is provided at the outer end of the horizontal section of the support rod 240. The side of the connecting platform 241 has a threaded hole and is threadedly connected to the threaded rod 250. The rotation of the threaded rod 250 drives the support rod 240 to slide directionally on the slide table 230, thereby adjusting the distance between the two graphite balls 210.

[0029] Furthermore, a pair of threaded rods 250 are tightly fitted with worm gears 251 near their ends, and the outer end of the output shaft of the servo motor 260 is coaxially connected to the worm gear meshing with the worm gears 251; the servo motor 260 is fixedly installed on the side of the slide table 230, and the servo motor 260 is electrically connected to the vision sensor 270.

[0030] Furthermore, an arc groove 223 is provided at the center of the side of the back plate 222. The arc groove 223 is adapted to engage with the graphite ball 210, so that the graphite ball 210 rolls without deviating. A connecting sleeve 224 protrudes from the center of the other side of the back plate 222 for connecting and fixing to the top of the support rod 240, for example, by bolting, so as to facilitate disassembly and replacement.

[0031] Furthermore, a protective cover 231 is provided on the top center of the slide table 230 to protect the worm gear 251 and worm from accumulating dust and water; the vision sensor 270 is embedded in the top surface of the protective cover 231, with its central axis pointing to the center of the gap between a pair of graphite balls 210 to ensure that the image is not deviated.

[0032] like Figure 7 As shown, the commutator 300 consists of a commutator rod 310 placed on the bottom surface of each pair of graphite balls 210 and a fan impeller 320 that controls the rotation of the two commutator rods 310. The fan impeller 320 is placed at the center of the top surface of the slide plate 110 and is arranged vertically in the axial direction. That is, the lower end of the central shaft of the fan impeller 320 is fitted with a bearing and the bearing is embedded in the slide plate 110 and can rotate freely. The fan impeller 320 and the commutator rod 310 transmit wind power through gears, so no additional power output is required, saving electricity.

[0033] Furthermore, a rubber sleeve is fitted on the outer wall of the reversing rod 310, utilizing the wear resistance of the rubber sleeve to contact the graphite ball 210 for frictional reversal. A main bevel gear 330 is coaxially connected to the bottom end of the central shaft of the impeller 320, and a secondary bevel gear 340, meshing with the main bevel gear 330, is tightly fitted at one end of the reversing rod 310. By designing the outer diameter of the main bevel gear 330 to be smaller than that of the secondary bevel gear 340, a speed reduction transmission effect is achieved, allowing the reversing rod 310 to slowly drive the graphite ball 210 to rotate in the opposite direction, ensuring continuous diffusion of wear on the surface of the graphite ball 210. Support plates 311 are fitted at both ends of the reversing rod 310, and the support plates 311 are fixed to the end face of the guide rail 120 by bolts.

[0034] In this invention, the precisely aligned electric heavy-duty truck contact network automatic capture arm operates as the electric heavy-duty truck moves. Each pair of graphite balls 210 clamps a wire, rolling and making contact with each other for electrical conductivity. Simultaneously, the wind force of the moving truck drives the impeller 320 to rotate continuously. The wind power is transmitted through gears, causing the reversing rod 310 to rotate slowly. This friction causes the graphite balls 210 to rotate in the opposite direction. Due to the rolling friction between the wire and the graphite balls 210, the wear on the surface of the graphite balls 210 continuously spreads, achieving uniform wear during electrical conductivity. The vision sensor 270 captures the gap between a pair of graphite balls 210 in real time and feeds it back to the microprocessor to control the servo motor 260 to drive the two threaded rods 250 to rotate. This, in turn, controls the two support rods 240 to adjust the gap between the pair of graphite balls 210, ensuring that it is smaller than the outer diameter of the wire. This ensures that the pair of graphite balls 210 can always support the wire. When the vision sensor 270 detects that the diameter of the graphite balls 210 is less than a threshold, it prompts for replacement and maintenance.

[0035] It should be noted that the fixed connection and fixing method of the present invention are achieved by conventional fixing means such as bolt connection, welding, or bonding that are compatible with each other. These are existing technologies and will not be described in detail here. The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A precision-connecting electric heavy-duty truck contact wire automatic capture pantograph, characterized by: Includes a slide plate (110) mounted on top of a bracket (100), on the top surface of the slide plate (110) a pair of conductive groups (200) slidably connected, the conductive group (200) being composed of a pair of graphite balls (210) arranged laterally close together, used to support the wire and make contact with the conductor, and a reversing group (300) is provided on the top surface of the slide plate (110) for automatically adjusting the graphite balls (210) to reverse contact with the conductor when receiving wind force; Several clamping parts (220) are fitted on the back side of the pair of graphite balls (210) near each other. A slide (230) is provided below the pair of graphite balls (210). The outer end of the clamping part (220) is fixedly connected to a support rod (240) that is slidably connected to the top surface of the slide (230). A pair of threaded rods (250) are threaded between the bottom of the two support rods (240), and the thread directions of the two threaded rods (250) are opposite. A vision sensor (270) is provided below the pair of graphite balls (210) near each other to monitor the gap size near each other in real time and to feed back to the microprocessor to control the servo motor (260) to drive the two threaded rods (250) to rotate, thereby controlling the two support rods (240) to drive the pair of graphite balls (210) to adjust the gap and satisfy that it is smaller than the outer diameter of the wire. The reversing assembly (300) consists of a reversing rod (310) placed on the bottom surface of each pair of graphite balls (210) and a wind turbine (320) that controls the rotation of the two reversing rods (310). The wind turbine (320) is placed at the center of the top surface of the slide plate (110) and is arranged vertically in the axial direction. The wind turbine (320) and the reversing rod (310) transmit wind power through gears.

2. The electric heavy-duty truck contact wire automatic capture archway for precise docking as described in claim 1, characterized in that: The clamping member (220) is integrally composed of a curved shell and a straight plate. The curved shell is adapted to be snapped into the central ring surface of the graphite ball (210). A backing plate (222) is hinged between several clamping members (220). A number of springs (221) are provided in a ring at equal intervals on the outer side of the backing plate (222). The central axis of the spring (221) points vertically to the central axis of the backing plate (222), and the outer end of the spring (221) is embedded in the side wall of the straight plate of the clamping member (220).

3. The electric heavy-duty truck contact wire automatic capture archway for precise docking according to claim 2, characterized in that: A pair of guide rails (120) are fixedly installed on the center line of the top surface of the slide plate (110). The slide table (230) is matched and engaged with the guide rails (120) and slides. The support rod (240) is L-shaped and has an orientation groove (242) on the center line of its horizontal section. A pair of pins are embedded on the top surface of the slide table (230) near the center. The pins are slidably inserted into the orientation groove (242).

4. The electric heavy-duty truck contact wire automatic capture pantograph with precise docking as described in claim 3, characterized in that: The horizontal section of the support rod (240) is provided with a connecting platform (241) at its outer end. The side of the connecting platform (241) is provided with a threaded hole and is threadedly connected to the threaded rod (250).

5. The electric heavy-duty truck contact wire automatic capture archway for precise docking according to claim 4, characterized in that: A pair of threaded rods (250) are tightly fitted with worm gears (251) near their ends, and the outer end of the output shaft of the servo motor (260) is coaxially connected to a worm that meshes with the worm gears (251).

6. The electric heavy-duty truck contact wire automatic capture archway for precise docking according to claim 5, characterized in that: The side of the back plate (222) has an arc groove (223) at its center. The arc groove (223) is adapted to be snapped into the graphite ball (210). The other side of the back plate (222) has a connecting sleeve (224) protruding from the center, which is used to be sleeved and fixed to the top of the support rod (240).

7. The electric heavy-duty truck contact wire automatic capture pantograph with precise docking as described in claim 6, characterized in that: The slide (230) is covered with a protective cover (231) in the middle of its top surface, and the vision sensor (270) is embedded in the top surface of the protective cover (231).

8. The electric heavy-duty truck contact wire automatic capture archway for precise docking according to claim 7, characterized in that: The outer wall of the reversing rod (310) is fitted with a rubber sleeve, and the bottom end of the central shaft of the impeller (320) is coaxially connected with a main bevel gear (330). One end of the reversing rod (310) is tightly fitted with a secondary bevel gear (340) that meshes with the main bevel gear (330).

9. The electric heavy-duty truck contact wire automatic capture archway for precise docking according to claim 8, characterized in that: Support plates (311) are fitted at both ends of the reversing rod (310), and the support plates (311) are fixed to the end face of the guide rail (120) by bolts.

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