Electric trailer

Abstract

The utility model relates to an electric trailer which comprises a trailer body and a traction frame. A frame of the trailer main body is connected with the traction frame; a rotating device and a lifting device are arranged on the vehicle frame at intervals, the rotating device is located on the side, close to the traction frame, of the vehicle frame, and forward rotation and reverse rotation of a wire coil on the lifting device are controlled through the rotating device. The electric trailer has the advantages that the trailer body is directly connected with the traction frame and can be connected with the traction frame through external traction power to drive the electric trailer to move, and manpower is saved; and meanwhile, through the arrangement of the rotating device and the lifting device on the frame, transportation of the wire coil with the large diameter and winding and unwinding of the cable can be achieved, a certain distance can be kept between the bottom of the wire coil and the ground through control of the lifting device, and the wire coil can be loaded to the frame conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable conveying equipment technical field, concretely is a kind of electric power trailer. BACKGROUND

[0002] The common electric power trailer on market is generally simple, and the carrying capacity is small, which needs to be transported to the work site by manpower or mechanical auxiliary transportation such as forklift and crane, and the cable roll of large tonnage needs to be hoisted to the electric power trailer by complex equipment, which consumes manpower and is low in efficiency. UTILITY MODEL CONTENT

[0003] The utility model provides an electric power trailer to improve transportation efficiency and reduce labor cost in view of the technical problems in the prior art.

[0004] The utility model solves the technical problems in the prior art by the technical scheme as follows:

[0005] An electric power trailer includes a trailer main body and a traction frame.

[0006] The frame of the trailer main body is connected with the traction frame.

[0007] Rotary devices and lifting devices are arranged on the frame at intervals, and the rotary devices are located on one side of the frame close to the traction frame, and the lifting devices are controlled by the rotary devices to rotate the wire disc on the lifting devices.

[0008] As a further technical scheme, the cross section of the frame is configured as a frame type, and the rotary devices and the lifting devices are arranged on both sides of the frame type in the length direction.

[0009] The side of the frame type away from the traction frame in the width direction is detachably connected with both sides of the frame type in the length direction.

[0010] As a further technical scheme, the rotary device includes a first telescopic cylinder, a U-shaped support arm, a rotary shaft and a roller.

[0011] The fixed end of the first telescopic cylinder is connected with the frame, and the telescopic end of the first telescopic cylinder is connected with the vertical edge of the U-shaped support arm, and the U-shaped support arm is rotated close to or away from the lifting device side by the first telescopic cylinder.

[0012] The vertical edges of the U-shaped support arm on both sides are symmetrically arranged on both sides of the frame in the length direction, the horizontal edge of the U-shaped support arm is provided with the rotary shaft, the rotary shaft is provided with the roller, and the rotary shaft is rotated to drive the roller to rotate the wire disc on the lifting device.

[0013] The first telescopic cylinder is provided with two and symmetrically provided on both sides of the length direction of the frame, and the first telescopic cylinder is located on the side close to the traction frame.

[0014] As a further technical solution, a roller is provided on both sides of the length direction of the rotating shaft, and the roller pushes the side plate on the wire reel to rotate.

[0015] As a further technical solution, the rotating shaft on the U-shaped support arm is provided with at least two and staggered in the up-down direction.

[0016] As a further technical solution, the lifting device comprises a support frame, a support sleeve, a second telescopic cylinder;

[0017] The support frame is vertically fixed to the upper end surface of the frame, the support sleeve is slidably sleeved on the support frame, the fixed end of the second telescopic cylinder is connected with the frame, and the telescopic end of the second telescopic cylinder is connected with the side of the support sleeve away from the wire reel. The second telescopic cylinder pushes the support sleeve to move along the height direction of the support frame;

[0018] The side of the support sleeve away from the second telescopic cylinder is provided with a mounting hole for mounting the wire reel.

[0019] As a further technical solution, the lifting device further comprises a first guide block and a second guide block;

[0020] The first guide block is provided on the rack, and the first guide block is opposite to the bottom of the support sleeve.

[0021] The second guide block is vertically provided on the upper end surface of the wheel cover assembly of the trailer body, and the slide rail on the second guide block is slidably connected with the slide block of the outer side wall of the support sleeve.

[0022] As a further technical solution, the traction frame comprises a < type connecting support, a force bearing frame, a traction ring and a steering wheel.

[0023] The two ends of the < type connecting support are respectively connected with the two ends of the length direction of the frame, the force bearing frame is horizontally and vertically connected with the frame, and one end of the force bearing frame is connected with the transverse side of the frame away from the lifting device, and the other end of the force bearing frame extends out of the apex of the < type connecting support to be connected with the traction ring.

[0024] The two outer side walls of the < type connecting support are provided with the steering wheels, and the steering wheels drive the trailer body to move.

[0025] As a further technical solution, the traction frame further comprises a limiting piece and a telescopic rod.

[0026] The limiting piece is fixed to the outer side wall of the < type connecting support, the telescopic rod is movably connected to the limiting piece, the lower part of the telescopic rod is rotatably connected to the steering wheel, and the height of the steering wheel is adjusted by controlling the position of the telescopic rod in the height direction through the limiting piece.

[0027] As a further technical solution, the trailer body further comprises a tire and a drive axle assembly.

[0028] The tire is connected with the drive axle assembly, and the tire is arranged on both sides of the length direction of the frame.

[0029] The beneficial effects of the utility model are:

[0030] 1. The trailer body is directly connected with the traction frame, the traction frame can be connected with the external traction power to drive the utility model electric trailer to move, and manpower is saved.

[0031] 2. The frame is designed as a frame type, that is, the electric trailer does not have a chassis, which facilitates the installation of the wire reel.

[0032] 3. The structure of the rotating device is simplified compared with the traditional electric trailer, manual rotation is avoided, work efficiency is improved, and manpower is saved.

[0033] In addition, the design of the first telescopic cylinder enables the utility model electric trailer to install wire reels of different models, thereby improving the adaptability of the electric trailer.

[0034] 4. The structure of the lifting device can adjust the height of the wire reel placed in the frame to adapt to different ground conditions, and saves manpower.

[0035] 5. The structure of the traction frame, when the traction frame is separated from the power source, the electric trailer can move through the steering wheel. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a perspective structural schematic view of the electric trailer without the first telescopic cylinder and the second telescopic cylinder.

[0037] Figure 2 It is a partial side view structural schematic view of the electric trailer.

[0038] Figure 3 It is a perspective structural schematic view of the electric trailer without the first telescopic cylinder and the second telescopic cylinder. Figure 1 It is an enlarged structural schematic view of A part.

[0039] Figure 4 It is a plan structural schematic view of the rotating shaft with the roller.

[0040] In the drawings, the components represented by each reference numeral are listed as follows:

[0041] The trailer main body 1, the frame 11, the tire 12, the drive axle assembly 13, the telescopic supporting leg 14, the manual brake system 15.

[0042] The traction frame 2, the < type connecting support 21, the force bearing frame 22, the traction ring 23, the steering wheel 24, the limiting piece 25, the telescopic rod 26.

[0043] The rotating device 3, the first telescopic cylinder 31, the U type support arm 32, the rotating shaft 33, the roller 34.

[0044] The lifting device 4, the support frame 41, the support sleeve 42, the mounting hole 421, the second telescopic cylinder 43, the first guide block 44, the second guide block 45.

[0045] The wheel cover assembly 5. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the present application.

[0047] In the description of the present application, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0048] In the description of the present application, the term "for example" is used to indicate "as an example, illustration or description". Any embodiment described as "for example" in the present application is not necessarily interpreted as more preferred or more advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that those skilled in the art can realize the present application without using these specific details. In other examples, well-known structures and processes will not be described in detail to avoid unnecessary details making the description of the present application obscure. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of principles and features disclosed in the present application.

[0049] Embodiment 1

[0050] In order to reduce cost and improve work efficiency, the present embodiment provides a power trailer, referring to Figure 1 、 Figure 2 , specifically comprising a trailer body 1, a towing frame 2; the frame 11 of the trailer body 1 is connected with the towing frame 2, that is, when the power source is connected with the towing frame 2, the power trailer of the present embodiment can be pulled; the rotating device 3 and the lifting device 4 are arranged on the frame 11 at intervals, and the rotating device 3 is located on one side of the frame 11 close to the towing frame 2, and the rotating device 3 controls the forward and reverse rotation of the wire reel on the lifting device 4.

[0051] It should be noted that the rotating device 3 can push the wire reel to rotate forward and reverse to realize the winding and unwinding of the cable on the wire reel. Of course, here, the forward rotation of the wire reel can also be for winding, and the reverse rotation is for winding the cable; the lifting device 4 is used to adjust the position of the height direction of the wire reel.

[0052] In the specific implementation process, referring to Figure 1The cross section of the frame 11 is configured as a frame type, therefore, the electric trailer of the utility model does not set a bottom plate, after the installation of the wire reel, the height requirement of the circuit transportation is greatly reduced; the two sides of the length direction of the frame type are both provided with the rotating device 3 and the lifting device 4, namely, the electric trailer of the embodiment does not have a chassis or a bottom plate structure, therefore, the wire reel can be accommodated in the frame type structure; preferably, the width of the frame type is greater than the diameter of the wire reel, so that the frame type frame 11 can be sleeved on the wire reel, then the connecting shaft is arranged in the middle of the wire reel, then the connecting shaft is inserted into the corresponding lifting device 4 on the frame 11, then the height of the wire reel from the ground is adjusted through the lifting device 4, and the automatic loading and unloading of the wire reel are realized. It can be explained that the side of the frame type away from the traction frame 2 in the width direction is detachably connected with the two sides of the length direction of the frame type (for example, the side can be connected by using a bolt, or the side can be opened by using a left side welded hinge and a right side welded spring hook, so that the side is convenient to detach), therefore, after the side of the frame type away from the traction frame 2 is detached, the wire reel can be rolled into the frame type, then the detached side of the frame is mounted, finally, the wire reel is mounted on the frame 11 as described above, and the height of the wire reel from the ground is adjusted through the lifting device 4.

[0053] In the specific implementation process, referring to Figure 1 、 Figure 2 、 Figure 4 , the rotating device 3 comprises a first telescopic cylinder 31, a U-shaped support arm 32, a rotating shaft 33 and a roller 34.

[0054] The fixed end of the first telescopic cylinder 31 is connected with the frame 11, and the telescopic end of the first telescopic cylinder 31 is connected with the vertical edges of the U-shaped support arm 32; the U-shaped support arm 32 is rotated to the side of the lifting device 4 by the first telescopic cylinder 31, that is, when the first telescopic cylinder 31 works, the two side walls of the U-shaped support arm 32 are rotated around the two vertices of the U-shaped structure under the action of the first telescopic cylinder 31 (that is, the wire reel is approached or distanced).

[0055] The vertical edges of the two sides of the U-shaped support arm 32 are symmetrically arranged on the two sides of the length direction of the frame 11, the horizontal edge of the U-shaped support arm 32 is provided with the rotating shaft 33, the rotating shaft 33 is sleeved with the roller 34, the rotating shaft 33 is rotated to drive the roller 34 to push the wire reel on the lifting device 4 to rotate forward or backward; the first telescopic cylinder 31 is provided with two and symmetrically arranged on the two sides of the length direction of the frame 11, the first telescopic cylinder 31 is located on the side close to the traction frame 2, that is, the two vertical edges of the U-shaped support arm 32 are both provided with the first telescopic cylinder 31, so as to work on the U-shaped support arm 32 at the same time.

[0056] It is explained that when the U-shaped support arm 32 pushes the wire drum to rotate under the action of the first telescopic cylinder 31, the roller 34 is in rolling connection with the side plate of the wire drum, and the side plate is pushed to rotate by the roller 34 to realize the winding and unwinding of the cable. In order to improve the accuracy, the edge of the side plate on the wire drum is located in the middle of the roller 34, that is, the side plate is always connected with the roller 34.

[0057] Further, one roller 34 is arranged on each side of the length direction of the rotating shaft 33, and the side plate on the wire drum is pushed to rotate by the roller 34. That is, two rollers 34 are arranged on the rotating shaft 33 and located on both sides of the length direction of the rotating shaft 33, so that when the rotating shaft 33 rotates under the action of the power, the roller 34 on the rotating shaft 33 rotates together, and then pushes the side plate on the wire drum to rotate, so as to finally realize the rotation of the wire drum to wind and unwind the cable. Therefore, in order to improve the motion accuracy, the side plate is located in the middle of the roller 34.

[0058] In order to improve the thrust, the rotating shaft 33 on the U-shaped support arm 32 is arranged at least two and staggered in the up-down direction, that is, two groups of rollers 34 are arranged to push the side plate to rotate, so as to increase the thrust for pushing the wire drum. It should be noted that the positions of the rollers 34 on the two rotating shafts 33 are the same.

[0059] In the specific implementation process, referring to Figures 1-3 , the lifting device 4 comprises a support frame 41, a support sleeve 42 and a second telescopic cylinder 43. The support frame 41 is vertically fixed to the upper end surface of the vehicle frame 11, the support sleeve 42 is slidably sleeved on the support frame 41, the fixed end of the second telescopic cylinder 43 is connected with the vehicle frame 11, and the telescopic end of the second telescopic cylinder 43 is connected with the side of the support sleeve 42 away from the installation wire drum. The second telescopic cylinder 43 pushes the support sleeve 42 to move along the height direction of the support frame 41, and the installation hole 421 for installing the wire drum is arranged on the side of the support sleeve 42 away from the second telescopic cylinder 43. That is, when the connecting shaft penetrating the wire drum is arranged in the installation hole 421, the second telescopic cylinder 43 can work to push the support sleeve 42 to slide along the support frame 41, for example, upward to adjust the distance from the ground.

[0060] It is explained that when the support sleeve 42 moves to the appropriate position, the support sleeve 42 and the support frame 41 can be locked by the locking member, for example, the locking member is a screw, that is, the screw penetrates the support sleeve 42 and the support frame 41 at the same time to fix them.

[0061] In the specific implementation process, referring to Figure 1 , Figure 2The traction frame 2 comprises a < type connecting bracket 21, a force bearing bracket 22, a traction ring 23 and a steering wheel 24; the two ends of the < type connecting bracket 21 are connected with the two ends of the length direction of the vehicle frame 11 respectively, the force bearing bracket 22 is connected with the vehicle frame 11 horizontally and perpendicularly, and one end of the force bearing bracket 22 is connected with the transverse side of the vehicle frame 11 away from the lifting device 4, and the other end of the force bearing bracket 22 extends out of the top point of the < type connecting bracket 21 to be connected with the traction ring 23, so that during the operation of the electric power trailer, the power source is connected with the traction ring 23, and then the traction ring 23 is pulled, at this time, the force bearing bracket 22 pulls the vehicle frame 11 to run; and when the traction ring 23 is not pulled by the power source and the electric power trailer needs to be moved, the steering wheel 24 is arranged on the outer side wall of the < type connecting bracket 21, and the trailer body 1 is moved through the steering wheel 24.

[0062] Further, the traction frame 2 further comprises a limiting piece 25 and a telescopic rod 26; the limiting piece 25 is fixed to the outer side wall of the < type connecting bracket 21, and the telescopic rod 26 is movably connected to the limiting piece 25, and the lower part of the telescopic rod 26 is rotationally connected with the steering wheel 24; the position of the telescopic rod 26 in the height direction is controlled through the limiting piece 25 to adjust the height of the steering wheel 24, that is, the distance between the telescopic rod 26 and the ground can be adjusted to adjust the height of the steering wheel 24 from the ground, so that the wire reel loaded in the electric power trailer can be parallel to the ground or can be arranged to be inclined to the ground under the action of the steering wheel 24, the telescopic rod 26 and the like. The design not only can adapt to different terrains (for example, flat terrain, inclined terrain and the like), but also can further facilitate the installation and disassembly of the wire reel.

[0063] It should be noted that referring to Figure 2 The trailer body 1 further comprises a tire 12 and a drive axle assembly 13; the tire 12 is connected with the drive axle assembly 13, and the two sides of the length direction of the vehicle frame 11 are both provided with the tire 12, and the tire 12 is moved through the traction frame 2. That is, during the movement of the electric power trailer, the tire 12 moves, and the steering wheel 24 also moves during the process. The rear axle drive in the electric power trailer can select a single axle single wheel or a double axle single wheel;

[0064] In order to stably park the electric power trailer, the outer side wall of the < type connecting bracket 21 is further provided with a telescopic supporting leg 14 to assist the tire 12 and the steering wheel 24 to stably park the electric power trailer.

[0065] For example, the drive axle assembly 13 includes an independent wheel end, a brake drum hub, a connecting shaft, a suspension arm, and a connecting bracket. The connecting shaft in the drive axle can be connected by a square tube, and the bracket connected to the frame 11 can be connected by bolts or welding.

[0066] The frame 11 can be a C-shaped beam structure or a rectangular tube tailor-welded structure.

[0067] In this embodiment, the first telescopic cylinder 31 and the second telescopic cylinder 43 can be hydraulic cylinders. The electric power frame 11 of this embodiment can be connected to a power vehicle with a 4x2 or 6x4 chassis to drive the electric power trailer to move.

[0068] The electric power trailer in this embodiment also includes a brake system provided on the trailer body 1. The brake system can be a pneumatic brake system or a manual brake system. The pneumatic brake system uses an emergency relay valve and a load distribution valve for control. The manual brake system 15 includes, for example, a steel wire rope and a rotating bracket.

[0069] In this embodiment, the frame 11 and the traction frame 2 can be detached, for example, by bolts and pins, which facilitates transportation and installation in other places, and is convenient and reliable.

[0070] The electric power trailer in this embodiment can carry a load of 20 tons and transport cables of various specifications (such as 2 meters to 4 meters in diameter). It overcomes the difficulty of ordinary transport vehicles that need to be adjusted or hoisted for loading and unloading. It realizes efficient loading, unloading, winding, and unwinding, and has high transportation and loading efficiency, improved safety and convenience, cost savings, simple operation, and reliable use, and is easy to promote.

[0071] Embodiment 2

[0072] This embodiment is based on Embodiment 1. To ensure that the support sleeve 42 with the coil always moves in a vertical direction and avoids position deviation, refer to Figures 1-3The lifting device 4 further comprises a first guide block 44 and a second guide block 45; the first guide block 44 is arranged on the vehicle frame 11 and is opposite to the bottom of the support sleeve 42, so that the support sleeve 42 is opposite to the first guide block 44 when running downward to the bottom, and the support sleeve 42 is borne by the first guide block 44 to return to the original position; during the height direction running of the support sleeve 42, the position deviation of the wire coil under the gravity of the wire reel or the deviation of the support sleeve 42 due to uneven force is avoided; the second guide block 45 is vertically arranged on the upper end surface of the wheel cover assembly 5 of the trailer main body 1, and the slide rail on the second guide block 45 is slidably connected with the slide block of the outer wall of the support sleeve 42, that is, the support sleeve 42 always slides along the second guide block 45, thereby ensuring the upward or downward movement of the wire coil in the vertical direction and further avoiding the injury of the worker when the wire coil deviates from the vehicle frame 11 due to uneven force.

[0073] For example, the longitudinal section of the contact surface between the first guide block 44 and the support sleeve 42 is configured as an L shape, and the opening direction of the L shape is towards the support sleeve 42.

[0074] The utility model discloses the following technical scheme:

[0075] The wire coil is arranged in the frame-shaped vehicle frame 11, the connecting shaft is inserted into the corresponding mounting hole 421 of the support sleeve 42 on both sides, and then the mounting hole 421 is locked, the height of the wire coil from the ground is adjusted by the lifting device 4, the power source (such as other large vehicles) is connected with the traction ring 23 to drive the electric trailer to move and realize transportation, in the process, the rotating device 3 does not work, which can protect the wire coil to a certain extent and strengthen the stability of the wire coil on the electric trailer.

[0076] When the electric trailer is transported to the destination and the wire coil needs to be wound or unwound, the first telescopic cylinder 31 in the rotating device 3 is started to make the roller 34 abut against the side plate of the wire coil, and then the motor drives the rotating shaft 33 to work, thereby driving the roller 34 to rotate and push the side plate to rotate, so as to achieve the purpose of winding or unwinding the wire coil.

[0077] When the electric trailer needs to be moved for a short distance or the electric trailer is moved without the power source, the height of the steering wheel 24 is adjusted, so that the steering wheel 24 and the tire 12 jointly drive the electric trailer to move.

[0078] When the electric trailer needs to be stably placed on the ground, the telescopic supporting leg 14 can be opened to stably park the electric trailer.

[0079] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0080] Although preferred embodiments of the application have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once they have been given the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the application.

[0081] Obviously, those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the claims of the application and their equivalents, the application also intends to include these modifications and variations.

Claims

1. An electric trailer, characterized in that, Includes trailer body (1) and tow frame (2); The frame (11) of the trailer body (1) is connected to the towing frame (2); The frame (11) is provided with a rotating device (3) and a lifting device (4) at intervals. The rotating device (3) is located on the side of the frame (11) close to the traction frame (2). The rotating device (3) controls the forward and reverse rotation of the coil on the lifting device (4).

2. An electric trailer according to claim 1, characterized in that, The cross-sectional structure of the frame (11) is frame-shaped, and the rotating device (3) and the lifting device (4) are provided on both sides of the frame in the length direction. The side of the frame away from the traction frame (2) in the width direction is detached from both sides in the length direction of the frame.

3. An electric trailer according to claim 1, characterized in that, The rotating device (3) includes a first telescopic cylinder (31), a U-shaped support arm (32), a rotating shaft (33), and a roller (34). The fixed end of the first telescopic cylinder (31) is connected to the frame (11), and the telescopic end of the first telescopic cylinder (31) is connected to the vertical side of the U-shaped support arm (32). The first telescopic cylinder (31) pushes the U-shaped support arm (32) to rotate closer to or away from the lifting device (4). The vertical sides of the U-shaped support arm (32) are symmetrically arranged on both sides of the length direction of the frame (11). The horizontal side of the U-shaped support arm (32) is provided with the rotating shaft (33). The rotating shaft (33) is fitted with the roller (34). The rotating shaft (33) rotates to drive the roller (34) to push the lifting device (4) to rotate forward and backward. The first telescopic cylinder (31) is provided in two and symmetrically arranged on both sides of the length direction of the frame (11), and the first telescopic cylinder (31) is located on the side closer to the traction frame (2).

4. An electric trailer according to claim 3, characterized in that, A roller (34) is provided on both sides along the length of the rotation axis (33), and the side plate on the reel is rotated by the roller (34).

5. An electric trailer according to claim 3, characterized in that, The rotating shaft (33) on the U-shaped support arm (32) has at least two shafts that are staggered in the vertical direction.

6. An electric trailer according to any one of claims 1-5, characterized in that, The lifting device (4) includes a support frame (41), a support sleeve (42), and a second telescopic cylinder (43). The support frame (41) is vertically fixed to the upper end face of the vehicle frame (11), the support sleeve (42) is slidably sleeved on the support frame (41), the fixed end of the second telescopic cylinder (43) is connected to the vehicle frame (11), and the telescopic end of the second telescopic cylinder (43) is connected to the side of the support sleeve (42) away from the mounting coil. The second telescopic cylinder (43) pushes the support sleeve (42) to move along the height direction of the support frame (41). The support sleeve (42) has a mounting hole (421) for mounting a coil on the side opposite to the second telescopic cylinder (43).

7. An electric trailer according to claim 6, characterized in that, The lifting device (4) also includes a first guide block (44) and a second guide block (45); The first guide block (44) is disposed on the frame (11), and the bottom of the first guide block (44) is opposite to the bottom of the support sleeve (42); The second guide block (45) is vertically disposed on the upper end face of the wheel cover assembly (5) of the trailer body (1), and the slide rail on the second guide block (45) is slidably connected to the slider on the outer side wall of the support sleeve (42).

8. An electric trailer according to claim 6, characterized in that, The traction frame (2) includes a <-type connecting bracket (21), a support frame (22), a traction ring (23), and a steering wheel (24); The two ends of the <-shaped connecting bracket (21) are respectively connected to the two ends of the frame (11) in the length direction. The support frame (22) is horizontally and vertically connected to the frame (11). One end of the support frame (22) is connected to the side of the frame (11) away from the lifting device (4). The other end of the support frame (22) extends out of the apex of the <-shaped connecting bracket (21) to connect with the traction ring (23). The steering wheel (24) is provided on both outer side walls of the <-type connecting bracket (21), and the trailer body (1) is driven to move by the steering wheel (24).

9. An electric trailer according to claim 8, characterized in that, The traction frame (2) also includes a limiting member (25) and a telescopic rod (26); The limiting member (25) is fixed to the outer wall of the <-type connecting bracket (21), the telescopic rod (26) is movably connected to the limiting member (25), and the lower part of the telescopic rod (26) is rotatably connected to the steering wheel (24). The position of the telescopic rod (26) in the height direction is controlled by the limiting member (25) to adjust the height of the steering wheel (24).

10. An electric trailer according to claim 9, characterized in that, The trailer body (1) also includes tires (12) and drive axle assembly (13). The tire (12) is connected to the drive axle assembly (13). The tire (12) is provided on both sides of the frame (11) in the length direction. The tire (12) is driven to move by the traction frame (2).

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