Folding electric trailer for transporting people

Abstract

The utility model discloses a new folding electric trailer for transporting a person, which includes a folding trailer body, wherein a seat is installed in the upper part of the front end of the folding trailer body, a steering rod unit is attached to the lower part of the front end of the folding trailer body, wherein said steering rod unit is connected to at least one first wheel; at least two second wheels are installed at the end of the folding trailer body remote from the steering rod unit; in addition, a power source and a controller are provided on the folding trailer body, intended for supplying electrical energy and controlling the operation.This design allows for a seat to be installed at the top of the trailer's folding body, providing occupant space, making the electric trailer easier to use. The steering column assembly is also slidably connected to the trailer's folding body, allowing the steering column assembly to extend, increasing the distance between the seat's support point and the first wheel's support point, thereby increasing stability when carrying a person and improving safety. Furthermore, a footrest is provided at the front of the trailer's folding body, providing comfortable footrest and the ability to drive while standing, expanding the trailer's functionality. The electric trailer is also foldable and can be stored, making it easy to transport.

Description

[0001] Folding Electric Trailer for Transporting People

[0002] Technical field

[0003] The utility model relates to the field of folding trailer technology, in particular to a folding electric trailer for transporting people.

[0004] State of the art

[0005] A folding trailer is a cargo trailer designed to fold and tow. Due to its ease of use, cargo carrying capacity, and convenient storage, as well as time and labor savings, it has found wide application in transporting items and is now often used for outdoor activities or short-distance transportation.

[0006] Using a traditional trailer requires manual towing, which is labor-intensive and time-consuming, especially inconvenient when climbing hills with a load. Therefore, a power-assisted trailer has also been developed. By installing an electric wheel and control device on the trailer body, this provides electric traction assistance during towing, improving energy efficiency and ease of use. However, this technical solution still has its drawbacks: while it can reduce physical effort to a certain extent, it still requires a person to pull from the front. This method only reduces the user's effort when towing the trailer. However, due to design limitations, this trailer is not designed for carrying people, forcing the user to walk, which can easily lead to fatigue and reduce user comfort.

[0007] In this regard, there is a need to develop a folding electric trailer for transporting people.

[0008] Disclosure of Utility Model

[0009] presence of structural elements;

[0010] element characteristics and their relationship.

[0011] The objective of the claimed utility model is to eliminate the shortcomings of existing technology and improve the performance characteristics of transportation devices.

[0012] The technical result, which the claimed utility model is aimed at achieving, is the creation of a trailer for transporting a person, ensuring convenience, stability and safety during use.

[0013] The essence of the utility model is that the folding electric trailer for transporting a person includes a folding trailer body, made with the possibility of folding in the longitudinal direction from front to back, wherein in the upper part of the front end of the folding trailer body a seat is installed, to the lower part of the front end of the folding trailer body a steering rod unit is attached, which is connected to the first two wheels, at the end of the folding trailer body, remote from the steering rod unit, second wheels are installed, wherein on the folding trailer body there is a power source designed to supply electrical energy to the second wheels, as well as a controller designed to control the operation of the second wheels, wherein the folding trailer body includes a first cargo frame and a second cargo frame, one end of the first cargo frame is connected to one end of the second cargo frame,on each of the two lateral sides of the first cargo frame, a bracket unit is respectively provided, wherein both ends of each bracket unit are respectively connected to the support elements, the first cargo frame and the second cargo frame are designed with the possibility of folding relative to each other, with the simultaneous bringing of the bracket units located on both sides into a folded state. In this case:,

[0014] on both sides of one end of the first cargo frame, telescopic inner rods are slidably installed, wherein the telescopic inner rods are configured to extend from the first cargo frame and move the steering rod assembly away from the first cargo frame;

[0015] the steering rod assembly includes a transverse steering crossbar and a steering rod, wherein the first wheel is located under the transverse steering crossbar, a rotary rod is installed in the middle part of the transverse steering crossbar, which is configured to rotate horizontally relative to the transverse steering crossbar, the lower part of the rotary rod is connected to the first wheel, wherein the steering rod, by means of the rotary rod, causes the first wheel to rotate;

[0016] the steering rod assembly also includes a sleeve rod, where one end of the sleeve rod is pivotally connected to the upper part of the pivot rod, the steering rod is slidably disposed inside the sleeve rod, the cross steering bar is pivotally connected to the telescopic inner rod;

[0017] a support frame is installed between two support members located at the same ends of two bracket assemblies, horizontal connecting rods are installed at the upper parts of both ends of each bracket assembly on each side respectively, and the upper parts of both ends of the bracket assembly are connected to the support members by means of connecting rods;

[0018] the first wheels are made in the amount of two, and the first two wheels are respectively installed on both ends of the transverse steering crossbar, the end of the rotary rod, remote from the steering rod, is movably connected to the steering rod, and both ends of the steering rod are respectively pivotally connected to the first two wheels;

[0019] at the lower ends of the two support elements located near the steering rod assembly, vertical first guide grooves are respectively formed, a footrest is installed between the two first guide grooves, while first guide axes are respectively provided on both sides of the lower end of the footrest, and the lower end of the footrest is slidingly connected to the first guide grooves by means of the first guide axes;

[0020] at least one folding limiting pin is provided in the inner part of the lower end of the lower surface of the footrest, designed to limit the translational movement of the steering rod assembly in the folded state of the footrest, at least one hole for the pin is made on the upper surface of the crossbar, mating with the folding limiting pin, while in the middle part of the upper end of the footrest, an unloading hole is additionally made, mating with the rotary rod;

[0021] in the inner part of the upper end of the lower surface of the footrest, at least one unfolded limiting pin is provided, designed to limit the translational movement of the steering rod assembly in the unfolded state of the footrest, wherein the unfolded limiting pin mates with the hole for the pin;

[0022] spaced rotary connecting eyes are formed in the upper part of the rotary rod, wherein an insertion hole is formed between the two rotary connecting eyes, a protrusion is provided at the lower end of the sleeve rod, wherein the protrusion is inserted between the two rotary connecting eyes and pivotally connected to them by means of an axis of rotation, a folding limiting element is movably installed in the inner part of the lower end of the sleeve rod, wherein when the folding limiting element is compressed by the steering rod, one end of the folding limiting element comes out through the protrusion and enters the insertion hole, wherein the rotation of the sleeve rod relative to the rotary rod is limited;

[0023] A ring-shaped handrail is provided at the top of the steering column, and folding grooves are provided on both sides of the ring-shaped handrail, and a handle is pivotally mounted at one end of the two folding grooves, and one of the handles is electrically connected to the controller and is used to control the speed of the second wheels;

[0024] Coaxial limiting holes are provided on the side wall of the steering rod and on the side wall of the sleeve rod, respectively; a limiting locking pin is additionally installed inside the steering rod, mating with the limiting holes; a locking pin button is provided in the inner part of the lower end of the annular handrail, and the locking pin button brings the limiting locking pin to an extended or retracted state;

[0025] An additional braking device is provided on the steering crossbar, and the braking device is connected to the first wheel;

[0026] At each point of the hinge connection of the telescopic inner rod with the crossbar, a folding limiting sleeve is additionally installed, while at the end of the folding limiting sleeve facing the crossbar, a return spring of the sleeve is provided, and the folding limiting sleeve, under the action of the elastic force of the return spring of the sleeve, is located in the connection area of ​​the telescopic inner rod with the crossbar;

[0027] the seat is made of a rigid material, and both ends of the seat are respectively pivotally connected to both sides of the upper portion of the front end of the folding body of the trailer, and the seat is configured to rotate forward or backward relative to the folding body of the trailer;

[0028] the seat is made of a flexible material, and the seat is placed inside the upper part of the front end of the folding body of the trailer, and support rods are provided on the front side and / or the rear side of the seat and connected to the folding body of the trailer;

[0029] The ends of the telescopic inner rods, remote from the second cargo frame, are pivotally connected to the steering rod assembly.

[0030] The advantageous effect of the utility model is as follows: by installing a seat at the upper part of the front end of the folding trailer body, it is possible to transport a person; by extending the steering rod assembly, the distance between the seat support point and the support point of the first wheels increases, which improves the stability and safety of movement; due to the use of the first two wheels, the stability of the front part during movement and turning is improved; at the same time, the second wheels serve as drive wheels, which ensures the electric movement of the trailer; in addition, the presence of a footrest improves the convenience of leg placement and allows you to use the trailer in a standing position; the folding design makes it easy to carry and store.

[0031] Brief description of drawings

[0032] The essence of the utility model is explained by drawings, where:

[0033] Fig. 1 is a schematic design diagram of the utility model;

[0034] Fig. 2 is a diagram of a folding body of a utility model trailer;

[0035] Fig. 3 is a schematic structural diagram of the footplate of the utility model;

[0036] Fig. 4 is a schematic structural diagram of the steering rod assembly of the utility model;

[0037] Fig. 5 is a schematic structural diagram of the steering rod of the utility model;

[0038] Fig. 6 is a sectional view of the folding limiting element of the utility model;

[0039] Fig. 7 is a diagram of the operating state of utility model I;

[0040] Fig. 8 is a diagram of the operating state of utility model II;

[0041] Fig. 9 is a diagram of the folded state of the utility model;

[0042] Fig. 10 is a circuit diagram of the utility model controller;

[0043] Fig. 11 is a block diagram of the electrical connections of the utility model;

[0044] Reference symbols on the attached drawings:

[0045] 1 - Folding trailer body; 11 - First cargo frame; 12 - Second cargo frame; 13 - Bracket unit; 131 - Support frame; 132 - Connecting rod; 133 - First guide groove; 134 - Second guide groove; 14 - Support member; 15 - Second wheel; 16 - Power source; 17 - Controller; 18 - Telescopic inner rod;

[0046] 2 - Steering Rod Assembly; 21 - Steering Crossbar; 211 - Pivot Rod; 212 - Steering Tie Rod; 213 - Pin Hole; 214 - Pivot Connecting Eye; 215 - Insert Hole; 216 - Brake Device; 217 - Folding Stop Sleeve; 218 - Guide Column; 219 - Extension Block; 22 - Steering Rod; 221 - Ring Grab; 222 - Folding Groove; 223 - Handle; 224 - Stop Device; 225 - Control Button; 226 - Display Device; 227 - Stop Hole; 228 - Stop Lock Pin; 229 - Lock Pin Button; 23 - Sleeve; 231 - projection; 232 - folding limiting element; 233 - return spring of folding limiting element; 234 - sliding hole of axle; 24 - first wheel;

[0047] 3 - Footrest; 31 - First Guide Axle; 32 - Second Guide Axle; 33 - Folding Limit Pin; 34 - Unfolding Limit Pin; 35 - Unloading Hole;

[0048] 4 - seat.

[0049] Implementation of a utility model

[0050] As shown in drawings 1-11, the utility model proposes a new type of folding electric trailer for transporting a person, including: a folding trailer body 1, wherein said folding trailer body 1 is configured to fold in the longitudinal direction from front to back; a seat 4 is installed in the upper part of the front end of the folding trailer body 1; a steering rod unit 2 is connected to the lower part of the front end of the folding trailer body 1, wherein said steering rod unit 2 is connected to at least one first wheel 24; at least two second wheels 15 are installed at the end of the folding trailer body 1, remote from the steering rod unit 2; in addition, a power source 16 is provided on the folding body of the trailer 1, designed to supply electrical energy to the first wheel 24 and / or second wheels 15, as well as a controller 17, designed to control the operation of the first wheel 24 and / or second wheels 15.

[0051] In particular, the folding body of the trailer 1 is made in the form of a folding trailer with longitudinal folding in the direction from front to back; in the upper part of the front end of the folding body of the trailer 1, a seat 4 is installed with the possibility of rotation, intended for placing a user on the folding body of the trailer 1; the steering rod unit 2 is connected to the lower part of the folding body of the trailer 1, wherein on the lower part of the steering rod unit 2, at least one first wheel 24 is provided; on both sides of the end of the folding body of the trailer 1, remote from the steering rod unit 2, one second wheel 15 is respectively installed, rigidly fixed on the folding body of the trailer 1. Between the first wheel 24 and the second wheels 15, a stable triangular support structure is formed, ensuring stable movement of the folding body of the trailer 1 during the transportation of cargo and reducing the likelihood of tipping over.Preferably, in this embodiment, the first wheel 24 is swivelable and can rotate to control the direction of travel, while the second wheels 15 are stationary and cannot rotate, preventing loss of control during travel. Furthermore, a controller 17 is provided in the front portion of the folding body of the trailer 1, which is designed to control the operation of the first wheel 24 and / or the second wheels 15, as well as a power source 16, which is designed to supply electrical energy to the first wheel 24 and / or the second wheels 15, so that the first wheel 24 and / or the second wheels 15, under the control of the controller 17, are capable of independent movement, setting the folding body of the trailer 1 in motion and providing an electric drive.In this case, the steering rod unit 2 is intended to control the rotation of the first wheel 24, and the user can be seated on the seat 4, thereby implementing the control function with the transportation of a person, as a result of which the folding trailer does not require manual traction when used, the ease of use is increased and the labor intensity for the user is reduced.

[0052] It should be noted that the first wheel 24 and the second wheels 15 can be configured as drive wheels, or one of the first wheel 24 and the second wheels 15 can be selected as the drive wheel, depending on the actual use requirements. In this embodiment, it is preferable to use the first wheel 24 as the drive wheel because it is located at the same end as the steering column unit 2, which simplifies and reduces wiring; in addition, the front-wheel drive configuration facilitates overcoming uneven and rugged road sections such as thresholds and protrusions, providing better cross-country ability, and also has greater traction, which improves driving performance when driving with a heavy load.

[0053] In this case, the drive wheel is an electric wheel known from the prior art and containing a built-in electric motor; drive wheels of electric bicycles, electric motorcycles, etc. can be used as an example, and therefore a detailed description of the structure of the electric wheel is not given here.

[0054] Next, the folding trailer body 1 includes: a first cargo frame 11 and a second cargo frame 12; one end of the first cargo frame 11 is pivotally connected to one end of the second cargo frame 12; a bracket unit 13 is respectively provided on each of the two side faces of the first cargo frame 11, wherein both ends of each bracket unit 13 are respectively connected to support elements 14; telescopic inner rods 18 are slidably mounted on both ends of the first cargo frame 11, wherein the ends of said telescopic inner rods 18, remote from the second cargo frame 12, are pivotally connected to the steering rod unit 2; said telescopic internal rods 18 are designed with the possibility of being extended from the first cargo frame 11, causing the steering rod assembly 2 to move away from the first cargo frame 11.

[0055] In particular, the folding body of the trailer 1 includes: a first cargo frame 11, a second cargo frame 12, bracket assemblies 13 and support elements 14; the support elements 14 are made in the amount of four and are arranged in the form of a rectangle, wherein the first cargo frame 11 and the second cargo frame 12 are located inside the rectangle formed by the support elements 14, and are mutually pivotally connected to each other by one end of the first cargo frame 11 and one end of the second cargo frame 12; on both sides of the ends of the first cargo frame 11 and the second cargo frame 12, remote from each other, they are respectively pivotally connected to the corresponding support elements 14, wherein between the two support elements 14 located on one side, a bracket assembly 13 is connected.The said bracket unit 13 is made in an X-shaped design, due to which, when compressed from both ends, it is capable of folding towards the middle part, as a result of which, during the relative folding of the first cargo frame 11 and the second cargo frame 12, the simultaneous folding of the bracket units 13 located on both sides is ensured; in the unfolded state, the said bracket unit 13 is intended for distributing and receiving the load falling on the first cargo frame 11 and the second cargo frame 12. Preferably, in order to reduce the overall weight of the folding body of the trailer 1, the first cargo frame 11 and the second cargo frame 12 are made hollow.In addition, on both inner sides of the end of the first cargo frame 11, remote from the second cargo frame 12, telescopic inner rods 18 are mounted with the possibility of sliding, wherein the length of said telescopic inner rods 18 is less than the length of the first cargo frame 11; said telescopic inner rods 18 are configured to be partially extended from the first cargo frame 11 if necessary. The front ends of the telescopic inner rods 18 are pivotally connected to the steering rod assembly 2, wherein the telescopic inner rods 18 are configured to rotate relative to the steering rod assembly 2 in the vertical direction, as a result of which, when folding the first cargo frame 11 and the second cargo frame 12, the telescopic inner rods 18 can fold relative to the steering rod assembly 2.When extended, the telescopic internal rods 18 are capable of moving the steering rod assembly 2 and the first wheel 24 in the direction of moving away from the first cargo frame 11, while the maximum extension value of the telescopic internal rods 18 is less than their own length, which ensures the lifting of the folding body of the trailer 1 due to the interaction of the telescopic internal rods 18 with the first cargo frame 11; in this case, when placing the user on the seat 4, more reliable support is provided.

[0056] It should be noted that inside the folding body of the trailer 1, there is additionally provided a canvas pocket (not shown in the drawings), designed to cover and hold objects placed inside the folding body of the trailer, in order to prevent them from falling out.

[0057] Next, the lower surface of the end of the first cargo frame 11, connected to the second cargo frame 12, is made with an opening, wherein a part of the end of the second cargo frame 12, located near the first cargo frame 11, is inserted inside the first cargo frame 11 and is pivotally connected to the first cargo frame 11.

[0058] In particular, the lower surface of the end of the first cargo frame 11 connected to the second cargo frame 12 is formed with an opening (not shown in the drawings), and the length of said opening is less than half the length of the first cargo frame 11; one end of the second cargo frame 12 is inserted inside the end of the opening of the first cargo frame 11, and the amount of insertion is less than the length of said opening, as a result of which the impossibility of relative folding of the first cargo frame 11 and the second cargo frame 12 is prevented. At the same time, such a design of the opening on the lower surface makes it possible to prevent the deflection of the first cargo frame 11 and the second cargo frame 12 under load, thereby increasing the load-bearing capacity of the first cargo frame 11 and the second cargo frame 12.

[0059] Next, between two support elements 14 located at the same ends of two bracket assemblies 13, a support frame 131 is installed; wherein in the upper parts of both ends of each bracket assembly 13, on each side, horizontal connecting rods 132 are respectively provided, by means of which the upper parts of both ends of the bracket assembly 13 are connected to the support elements 14.

[0060] In particular, in order to increase the overall stability of the folding body of the trailer 1, in addition to the bracket units 13, between the two support elements 14 located in the front part of the folding body of the trailer 1, as well as between the two support elements 14 located in the rear part, support frames 131 are respectively installed. The said support frames 131 can be made in the form of a rectilinear shape, an X-shape or another shape; due to the installation of the support frames 131, the tilt of the two support elements 14 located at one end towards the middle part is effectively prevented, while the support frames 131 also perform the function of supporting the seat 4, distributing the load that occurs when transporting a person.Moreover, since the bracket assemblies 13 are also made in an X-shaped design, when they are folded, the height of both their ends increases, and the ends of the bracket assemblies 13 are connected to the support elements 14, as a result of which, in order to prevent kinematic interference, leading to the impossibility of folding the bracket assemblies 13, in conventional solutions the support elements 14 are made telescopic. However, the use of a telescopic design easily reduces the stability of the support elements 14. In this regard, in this embodiment, it is preferable that horizontal connecting rods 132 are respectively pivotally mounted in the upper portions of both ends of each bracket assembly 13, wherein the other end of each connecting rod 132 is pivotally connected to the upper portion of the corresponding support element 14.Since the lower part of the bracket assembly 13 is limited and cannot move, the folding of the bracket assembly 13 is achieved by moving its upper part; thus, to implement the folding of the bracket assembly 13, it is sufficient to install connecting rods 132 in the upper parts of its ends, without the need to make the supporting elements 14 telescopic. Moreover, due to the horizontal arrangement of the connecting rods 132, they are also capable of supporting the seat 4.

[0061] It should be noted that the length of the connecting rod 132 must correspond to the amount of movement of the upper part of the bracket unit 13; otherwise, it may affect the unfolding or folding of the bracket unit 13.

[0062] Next, in this embodiment, the steering rod assembly 2 includes: a crossbar 21, a steering rod 22 and a sleeve rod 23; the first wheel 24 is located under the crossbar 21; a rotary rod 211 is installed in the middle portion of the crossbar 21, and the said rotary rod 211 is configured to rotate horizontally relative to the crossbar 21; one end of the sleeve rod 23 is pivotally connected to an upper portion of the rotary rod 211; the steering rod 22 is slidably accommodated inside the sleeve rod 23; the crossbar 21 is pivotally connected to the telescopic inner rod 18; the lower part of the rotary rod 211 is connected to the first wheel 24, wherein the steering rod 22, by means of the rotary rod 211, sets the first wheel 24 into a turning motion.

[0063] In particular, the steering rod assembly 2 includes: a transverse steering crossbar 21, a steering rod 22 and a sleeve rod 23; both ends of the transverse steering crossbar 21 are respectively pivotally connected to the telescopic inner rods 18, wherein the first wheels 24 are mounted on the end sections of the transverse steering crossbar 21. In the middle part of the transverse steering crossbar 21, a rotary rod 211 is rotatably mounted, configured to rotate horizontally relative to the transverse steering crossbar 21; the lower end of the rotary rod 211 is connected to the first wheel 24, wherein the rotation of the first wheel 24 is carried out under the control of the rotary rod 211.The sleeve 23 is pivotally connected to the upper end of the rotary rod 211, wherein the steering rod 22 is slidably located inside the sleeve rod 23 and is designed to extend beyond the sleeve rod 23; if it is necessary to adjust the height of the steering rod 22, the latter extends from the sleeve rod 23. If it is necessary to tow the folding body of the trailer 1, the sleeve 23 can be turned relative to the rotary rod 211 in an inclined position, which facilitates the towing. When the telescopic internal rods 18 are extended, a synchronous movement of the transverse steering crossbar 21 and the first wheel 24 is ensured, as a result of which the distance between the support point of the first wheel 24 and the support point of the second wheels 15 increases, and the support point of the seat 4 is completely located between the first wheel 24 and the second wheels 15, thereby increasing the stability of the electric trailer when transporting a person.

[0064] Next, two first wheels 24 are provided, wherein the two said first wheels 24 are respectively installed on both ends of the cross steering crossbar 21; the end of the rotary rod 211, remote from the sleeve rod 23, is movably connected to the steering rod 212, wherein both ends of the said steering rod 212 are respectively pivotally connected to the two first wheels 24.

[0065] In particular, since the three-wheel structure is prone to overturning when turning, in order to improve the driving stability of the folding body of the trailer 1 and improve the safety of the driver, in this embodiment, two first wheels 24 are preferably provided, and said two first wheels 24 are respectively mounted on the end sections of the steering crossbar 21. In order to ensure the simultaneous synchronous rotation of the two first wheels 24 in one direction, a steering rod 212 is movably mounted on the lower part of the rotary rod 211, and both ends of the steering rod 212 are respectively pivotally connected to the corresponding first wheels 24. When the rotary rod 211 rotates, the steering rod 212 moves to the left or to the right, causing both first wheels 24 to turn to the left or to the right, as a result of which synchronous control of the two first wheels 24 is ensured.

[0066] Further, in this embodiment, at the lower ends of the two support members 14 located near the steering rod assembly 2, respectively, vertical first guide grooves 133 are formed; between the two said first guide grooves 133, a footrest 3 is installed, while on both sides of the lower end of the footplate 3, respectively, first guide axes 31 are provided, and the lower end of the footplate 3 is slidably connected with the first guide grooves 133 by means of the said first guide axes 31.

[0067] In particular, when the steering rod assembly 2 moves forward and the user is seated on the seat 4, due to the gap between the two telescopic inner rods 18, it is inconvenient to place the legs; although the legs can be placed on the telescopic inner rods 18, such a position requires spreading the legs and is inconvenient. In this regard, in this embodiment, on the lower parts of the two support members 14 located on the first cargo frame 11, respectively, outer vertical first guide grooves 133 are provided, and said first guide grooves 133 are located on the outer surface of the support members 14.Between two first guide grooves 133 a footrest 3 is mounted, wherein on both sides of the lower end of the footrest shield 3 first guide axes 31 are respectively provided, by means of which the footrest 3 is slidably connected to the first guide grooves 133, as a result of which the footrest 3 is limited in a position in front of two support elements 14. The footrest 3, by means of the interaction of the first guide axes 31 with the first guide grooves 133, is configured to rotate relative to the support elements 14: when the steering rod unit 2 is not extended, the footrest 3 is vertically adjacent to the front side of the support elements 14, and when the steering rod unit 2 is extended, the footrest 3 can be turned downwards and rest on the telescopic internal rods 18 and the crossbar 21.In this case, when the user is placed on the seat 4, the user can rest his feet on the footrest 3; in addition, the installation of the footboard 3 also makes it possible to control the device in a standing position.

[0068] At the same time, in order to ensure that when the footboard 3 is vertically adjacent to the front side of the support elements 14, no manual limitation of its rotation is required, in the upper parts of the two support elements 14 that are not equipped with the first guide grooves 133, second guide grooves 134 are respectively made, and in the upper part of each second guide groove 134 a window is made (not shown in the drawings). At the same time, on both sides of the end of the footboard 3, remote from the first guide axes 31, second guide axes 32 are respectively provided, mating with the second guide grooves 134, due to which the footboard 3 is held in a vertical position at the front end of the folding body of the trailer 1 through the interaction of the second guide axes 32 with the second guide grooves 134.If it is necessary to rotate the footboard 3, it is sufficient to lift the footboard 3 in such a way that the second guide axles 32 come out through the window from the second guide grooves 134, after which the rotation of the footboard 3 is ensured.

[0069] It should be noted that since the footboard 3 is located above the telescopic internal rods 18 and is configured to rotate relative to the support elements 14, in order to prevent the rotation of the footboard 3 from being limited by the telescopic internal rods 18 in the state when the footboard 3 is in the unfolded position, at the end of the footboard 3 located near the folding body of the trailer 1, an unloading (compensatory) structure is provided, mating with the telescopic internal rods 18, which ensures the normal rotation of the footboard 3.

[0070] Further, in the inner part of the lower end of the lower surface of the footboard 3, at least one folding limiting pin 33 is provided, intended to limit the translational movement of the steering rod unit 2 in the folded state of the footboard 3; in the inner part of the upper end of the lower surface of the footboard 3, at least one unfolded limiting pin 34 is provided, intended to limit the translational movement of the steering rod unit 2 in the unfolded state of the footboard 3. On the upper surface of the transverse steering crossbar 21, at least one hole is made for the pin 213, mating with the said folding limiting pin 33 and the unfolded limiting pin 34; in addition, in the middle part of the upper end of the footboard 3, an unloading hole 35 is made, mating with the rotary rod 211.

[0071] In particular, at the end of the footboard 3, located near the folding body of the trailer 1, in the unfolded position of the footboard 3, at least one folding limiting pin 33 is provided, wherein the said folding limiting pin 33 is located with a gap and parallel to the lower surface of the footboard 3; at the end of the footboard 3, remote from the folding body of the trailer 1, in the unfolded position, at least one unfolded limiting pin 34 is provided. At the same time, on the upper surface of the crossbar 21, holes are made for pins 213, corresponding and mating with the folding limiting pin 33 and the unfolded limiting pin 34.When the footboard 3 is in the unfolded position, the unfolded limiting pin 34 enters the hole for the pin 213, as a result of which the translational movement of the transverse steering crossbar 21 is limited by the footboard 3, and the transverse steering crossbar 21 cannot move; the translational movement of the transverse steering crossbar 21 becomes possible only after the footboard 3 is raised. If it is necessary to retract the transverse steering crossbar 21, the footboard 3 is first raised, removing the unfolded limiting pin 34 from the hole for the pin 213, and the footboard 3 is installed vertically at the front side of the support elements 14, wherein the folding limiting pin 33 changes direction from an orientation towards the folding body of the trailer 1 to a downward orientation.After the crossbar 21 has been retracted to a certain distance, further retraction is limited by the folding limiting pin 33; at this point, the footrest 3 is pulled upward, and due to the presence of the first guide grooves 133, the footrest 3 moves upward, as a result of which the crossbar 21 is released from the limitation of the folding limiting pin 33 and can be retracted further to the limit position. After the footboard 3 has been lowered, the folding limiting pin 33, which corresponds to the hole for the pin 213, enters the said hole for the pin 213, as a result of which, after the crossbar 21 has been retracted, its translational movement becomes impossible.Thus, by means of the unfolded limiting pin 34 of the footboard 3, the limitation of the crossbar 21 in the extended position is realized, and by means of the folding limiting pin 33, the limitation of the crossbar 21 in the retracted position is realized.

[0072] Further, in this embodiment, at each place of the hinge connection of the telescopic inner rod 18 with the transverse steering crossbar 21, a limiting sleeve folding element 217 is additionally installed; at the end of the said limiting sleeve folding element 217 facing the transverse steering crossbar 21, a return spring of the sleeve is provided, and the limiting sleeve folding element 217, under the action of the return spring of the sleeve, is located in the connection zone of the telescopic inner rod 18 with the transverse steering crossbar 21.

[0073] In particular, since the telescopic inner rod 18 can be completely retracted into the first cargo frame 11, and the crossbar 21 is located with a gap with respect to the first cargo frame 11 due to the restriction from the support members 14, when the telescopic inner rod 18 rotates, it may be restricted by the support frame 131 and is not able to rotate synchronously with the first cargo frame 11. In this regard, at both ends of the telescopic inner rod 18, respectively, horizontally protruding extension blocks 219 are provided for compensating for the gap between the telescopic inner rod 18 and the first cargo frame 11, due to which the telescopic inner rod 18 can be completely retracted into the first cargo frame 11, and its rotation axis coincides with the rotation axis of the first cargo frame 11.Since the crossbar 21 is pivotally connected to the telescopic inner rod 18, in order to prevent the rotation of the telescopic inner rod 18 relative to the crossbar 21 during normal operation, a folding limiting sleeve 217 is movably mounted on the extension block 219. Return springs of the sleeve (not shown in the drawings) are respectively provided on both sides of the end of said folding limiting sleeve 217 facing the crossbar 21. Under the action of the return springs of the sleeve, the folding limiting sleeve 217 is pressed against the place of the pivot connection of the extension block 219 with the telescopic inner rod 18, thereby limiting the rotation of the telescopic inner rod 18 relative to the extension block 219.When the crossbar 21 is retracted to the limit position, the folding limiting sleeve 217 is the first to come into contact with the first load frame 11 and, under the action of pressure from the first load frame 11, moves in the direction of the crossbar 21, simultaneously compressing the return springs of the sleeve. At the moment when the crossbar 21 is fixed by means of the folding limiting pin 33, the folding limiting sleeve 217 is already removed from the area of ​​the hinge connection of the extension block 219 with the telescopic inner rod 18, as a result of which the telescopic inner rod 18 is able to rotate relative to the extension block 219.When the crossbar 21 is extended, the folding limiting sleeve loses pressure from the side of the first cargo frame 11 and, under the action of the elastic force of the return springs of the sleeve, moves again into the area of ​​the hinge connection of the extension block 219 with the telescopic inner rod 18.

[0074] It should be noted that on both sides of the end of the folding limiting sleeve 217 facing the steering crossbar 21, guide columns 218 are respectively provided, and said guide columns 218 are configured to be inserted inside the steering crossbar 21; the return spring of the sleeve is located outside the guide columns 218, which prevents its displacement during compression and eliminates abnormal deformation of the return spring of the sleeve.

[0075] Next, in the upper part of the rotary rod 211, spaced apart rotary connecting eyes 214 are formed, wherein between the two said rotary connecting eyes 214, an insertion hole 215 is formed; at the lower end of the sleeve rod 23, a projection 231 is provided, wherein the said projection 231 is inserted between the two rotary connecting eyes 214 and pivotally connected to them by means of an axis of rotation; in the inner part of the lower end of the sleeve rod 23, a folding limiting element 232 is movably installed, when compressed by the steering rod 22, one end of the said folding limiting element 232 comes out through the projection 231 and enters the insertion hole 215.

[0076] In particular, in the upper part of the rotary rod 211, spaced apart rotary connecting lugs 214 are formed; at the same time, a protruding projection 231 is provided on the lower part of the sleeve rod 23, wherein the distance between said projection 231 and the two rotary connecting lugs 214 is matched in such a way that the projection 231 can be inserted between the two rotary connecting lugs 214. To implement the hinge connection, the projection 231 and the two rotary connecting lugs 214 are connected by means of an axis of rotation, due to which the rotation of the sleeve rod 23 relative to the rotary rod 211 is ensured.In order to prevent the rotation of the sleeve rod 23 relative to the rotary rod 211 when not necessary, a folding limiting element 232 is slidably mounted in the inner part of the lower end of the sleeve rod 23, wherein said folding limiting element 232 is configured to move upward and downward inside the lower part of the sleeve rod 23. One end of the folding limiting element 232 is configured to exit outward through the projection 231; at the end of the folding limiting element 232 located inside the sleeve rod 23, a return spring of the folding limiting element 233 is provided. When the folding limiting element 232 is compressed by the steering rod 22, one end of the folding limiting element 232 extends beyond the projection 231, while the return spring of the folding limiting element 233 is simultaneously compressed.After the force applied by the steering rod 22 is removed, the folding limiting element 232 is again drawn into the sleeve rod 23 under the action of the elastic force of the return spring 233. In order to ensure the fixation of the folding limiting element 232 in interaction with the rotary rod 211, an insertion hole 215 is made between the two rotary connecting lugs 214 in the upper part of the rotary rod 211; when the end of the folding limiting element 232 extends beyond the protrusion 231, the said end is inserted into the insertion hole 215, as a result of which, due to the interaction of the folding limiting element 232 and the insertion hole 215, the rotation of the sleeve rod 23 relative to the rotary rod 211 is limited.In this case, in the middle part of the folding limiting element 232, a sliding hole of the axis 234 is made, wherein the axis of rotation, by means of which the footrest 23 is pivotally connected to the rotary rod 211, is located inside the said sliding hole of the axis 234, due to which the folding limiting element 232 is made with the possibility of sliding between the sleeve rod 23 and the rotary rod 211. After the pressure from the steering rod 22 is stopped, the return spring 233 lifts the folding limiting element 232; in this case, due to the limitation from the side of the axis of rotation, the amount of lifting of the folding limiting element 232 is limited and can be adjusted by the length of the sliding hole of the axis 234.

[0077] Further, in this embodiment, an annular handrail 221 is provided at the upper end of the steering rod 22, and folding grooves 222 are respectively formed on both sides of the handle ring 221; a handle 223 is pivotally mounted at the same end of the two folding grooves 222, and one of the said handles 223 is electrically connected to the controller 17 and is intended to control the operating speed of the first wheel 24 and / or the second wheels 15. At the end of the handle 223 connected to the folding groove 222, a limiting device 224 is additionally provided, intended to fix the handle 223 in a state when it is laid in the folding groove 222, or when the handle 223 is located horizontally relative to the handle ring 221.In addition, on the handle ring 221, several control buttons 225 and one display device 226 are provided, wherein said control buttons 225 and display device 226, respectively, are electrically connected to the controller 17 by means of wires. On the side wall of the steering rod 22 and on the side wall of the sleeve rod 23, respectively, coaxial limiting holes 227 are made; inside the steering rod 22, a limiting locking pin 228 is additionally installed, wherein said limiting locking pin 228 is mated with the limiting holes 227. In the inner part of the lower end of the handle ring 221, a locking button 229 is provided, wherein said locking button 229 brings the limiting locking pin 228 into an extended or retracted state. In addition, a braking device 216 is additionally provided on the crossbar 21, wherein said braking device 216 is connected to the first wheel 24.

[0078] In particular, an annular handle 221 is provided at the upper end of the steering rod 22; the shape of said handle ring 221 can be made in the form of an inverted trapezoid, a triangle, a rectangle, a circle or another polygon, etc., which ensures the convenience of gripping and towing by the user. Folding grooves 222 are respectively formed on both sides of the handle ring 221, and a handle 223 is pivotally mounted at one end of the folding groove 222; said handle 223 is configured to be placed in the folding groove 222 when not in use and to be rotated to a horizontal position when in use.In order to comply with the user's control habits, one of the handles 223 is preferably made rotatable, that is, said handle 223 is made with the ability to rotate in place relative to the handle ring 221, similar to the accelerator handle of an electric bicycle, wherein the rotation speed of the first wheel 24 is regulated by means of the rotation angle of said handle 223. On the upper surface of the end of the folding groove 222, connected to the handle 223, a limiting device 224 is additionally provided, wherein said limiting device 224 is made in the form of a locking pin mechanism with an internal spring; at the same time, at the end of the handle 223, connected to the folding groove 222, a limiting opening 227 is made, mating with the limiting device 224, for fixing 223 in a horizontal position relative to the handle ring 221 or in a storage position.In addition, several control buttons 225 are provided on the handle ring 221, wherein said control buttons 225 include, but are not limited to, a forward / backward movement button, a driving / tow mode switching button, a button for regulating the speed of the auxiliary trailer drive, a button for turning on the lights, a horn button, a button for controlling the turn signals, etc.; the design of said control buttons can be made with reference to the push-button arrangement of prior art electric bicycles. A display device 226 is also provided on the handle ring 221, designed to indicate the charge level and the driving speed, etc., wherein the control buttons 225 and the display device 226 are respectively electrically connected to the controller 17 via wires.

[0079] On the side wall of the steering rod 22 and on the side wall of the sleeve rod 23, respectively, coaxial limiting holes 227 are made; inside the steering rod 22, a limiting locking pin 228 is provided, mating with the said limiting holes 227. In addition, on the ring of the handle 221, a button of the locking pin 229 is provided, and the limiting locking pin 228, under the action of pressing the button of the locking pin 229, comes out of the steering rod 22 and enters the limiting holes 227 of the steering rod 22 and the sleeve rod 23, thereby limiting the movement of the steering rod 22 inside the sleeve rod 23 and preventing its free movement. The specific interaction between the button of the locking pin 229 and the limiting locking pin 228 can be realized by analogy with the locking mechanism of the retractable handle of a suitcase of the prior art or, for example, by analogy with the design disclosed in patent CN 201821724858.2, and therefore a detailed description of the said interaction is not provided here.

[0080] Furthermore, a braking device 216 is additionally provided on the crossbar 21, which is intended for braking; said braking device 216 is designed as a foot brake of a traditional three-wheeled vehicle and is connected to the braking mechanisms of the first two wheels 24, and by pressing the braking device 216, the rotation of the first wheels 24 is slowed down or stopped.

[0081] Further, in this embodiment, the seat 4 is made of a rigid material, and both ends of said seat 4 are respectively pivotally connected to both sides of the upper portion of the front end of the folding body of the trailer, and said seat 4 is configured to rotate forward or backward relative to the folding body of the trailer.

[0082] Specifically, in order to improve the stability and load-bearing capacity of the seat 4, said seat 4 is made of a rigid material such as a wooden board, plastic, aluminum board, etc., which ensures sufficient load-bearing capacity with a relatively light weight. When the seat 4 is made of a rigid material, both ends thereof are respectively hingedly connected to both sides of the upper portion of the front end of the folding body of the trailer 1, due to which, in the operating state, the seat 4 can be laid horizontally inside the upper portion of the front end of the folding body of the trailer 1, and the user can directly sit on it if necessary. The seat 4 is supported by connecting rods 132 provided on the folding body of the trailer 1 and is capable of supporting the load of the weight of the human body.The hinged connection of the seat 4 allows it to rotate: when placing loads in the folding body of the trailer 1, the seat can be rotated counterclockwise and moved beyond the front end of the folding body of the trailer 1 so as not to interfere with the placement of objects; after placing the objects, the seat can be rotated clockwise and returned to the inside of the front end of the folding body of the trailer 1. In addition, the rotary installation of the seat 4 prevents the folding of the folding body of the trailer 1 from being limited during its longitudinal folding due to the presence of the seat 4, thereby eliminating an increase in the occupied volume, and also provides the possibility of using the seat 4 in outdoor conditions as a table top.

[0083] Further, in this embodiment, the seat 4 is made of a flexible material, and said seat 4 is located inside the upper portion of the front end of the folding body of the trailer 1; on the front side and / or on the rear side of the seat 4, support rods are provided that are connected to the folding body of the trailer 1.

[0084] In particular, in order to reduce the weight and improve the comfort of the seat, the seat 4 can also be made of a flexible material such as fabric, etc. When using a fabric material, both ends of the seat 4 are covered by connecting rods 132, and the seat 4 is supported by the connecting rods 132, and the user can directly sit on the seat 4. However, due to the flexible property of the seat 4, when used under the action of gravity, a situation may arise in which the bracket units 13 on both sides are pulled toward the middle part, which leads to tilting and deformation of the structure and adversely affects the use.In this regard, it is necessary to provide support rods on the front side and / or on the rear side of the seat 4, preferably on both the front and rear sides, wherein both ends of said support rods must be connected to connecting rods 132 in order to limit the inclination of the bracket assemblies 13 on both sides towards the middle part. It should be noted that the support rods can be designed with the possibility of a detachable connection or with a sliding connection; a sliding connection is understood to mean the possibility of their movement in the direction of the steering rod unit 2 for adjusting the position of the support rods relative to the folding body of the trailer 1, which makes it possible to avoid influencing the folding of the folding body of the trailer 1 during its assembly.

[0085] Operating state and driving principle: in particular, as shown in Fig. 1, the control state is shown. In this state, when folding is required, first the footboard 3 is lifted from the steering crossbar 21 and installed vertically, pressing it against the front end surface of the folding body of the trailer 1. Then the steering rod unit 2 is moved in the direction of the folding body of the trailer 1, as a result of which the telescopic inner rods 18 are retracted until the steering crossbar 21 is stopped by the folding stop pin 33. Then the footboard 3 is pulled up, ensuring the full retraction of the telescopic inner rods 18, and the steering crossbar 21 is also fully retracted.At this moment, the folding limiting sleeve 217, under the action of compression from the side of the first cargo frame 11, is displaced and pulled onto the extension block 219, exposing the area of ​​the hinge connection of the extension block 219 with the telescopic inner rod 18. After the complete retraction of the crossbar 21, the folding limiting pin 33 is aligned with the hole for the pin 213; then the footrest 3 is lowered, and the folding limiting pin 33 enters the hole for the pin 213, thereby realizing the fixation of the crossbar 21. After this, an upward force is applied to the middle part of the first cargo frame 11 and the second cargo frame 12, as a result of which the first cargo frame 11 and the second cargo frame 12 fold relative to each other. During the process of folding them, the bracket assemblies 13, located on both sides, are simultaneously brought into a folded state to the state shown in Fig. 9, in which the folding operation is completely completed.

[0086] When unfolding is required, a forward force is first applied to one end of the folding body of the trailer 1, and a backward force is applied to the other end; under the action of these oppositely directed forces, the first cargo frame 11 and the second cargo frame 12 move from the folded state to the unfolded state and straighten. During the unfolding of the first cargo frame 11 and the second cargo frame 12, the bracket assemblies 13 located on both sides are synchronously brought into the unfolded state.After the unfolding is complete, the footrest 3 is lifted, causing the folding limiting pin 33 to come out of the hole for the pin 213, then the steering rod unit 2 is pulled forward; after moving a given distance, the footrest 3 is lowered to a horizontal position, wherein the unfolded limiting pin 34 enters the hole for the pin 213, realizing the fixation of the steering rod unit 2 in the unfolded state and preventing its retraction or additional extension. Simultaneously, when the steering rod unit 2 is extended, the folding limiting sleeve 217, due to the loss of pressure from the first cargo frame 11, is extended under the action of the elastic force of the return spring of the sleeve and takes a position in the area of ​​the connection of the extension block 219 with the telescopic inner rod 18, thereby limiting the rotation of the crossbar 21 relative to the telescopic inner rod 18.At this point, the unfolding operation is completed; in this state, the user can sit on the seat 4, rest his feet on the footrest 3 and exercise control via the steering rod assembly 2.

[0087] The semi-unfolded state, as shown in Fig. 7 and Fig. 8, is a state in which the folding body of the trailer 1 is in a fully unfolded position, and the steering rod unit 2 is in a non-extended state; this state facilitates towing. In this state, by pressing the locking pin button 229, the limit locking pin 228 is retracted, after which the steering rod 22 is extended relative to the sleeve rod. After the steering rod 22 is extended by a predetermined distance and the limit holes 227 of the steering rod 22 and the sleeve rod are aligned, the limit locking pin 228 automatically comes out and enters the corresponding limit holes 227, fixing the steering rod 22 again.At the same time, when the steering rod 22 is extended, due to the absence of pressure from the steering rod 22, the folding limiting element 232 is extended upward under the action of the elastic force of the return spring of the folding limiting element 233, whereby the end of the folding limiting element 232 comes out of the insertion hole 215 and is drawn into the protrusion 231; as a result of this, the sleeve 23 is able to rotate relative to the rotary rod 211 in the vertical direction, as a result of which the steering rod 22 is brought to an inclined position, which facilitates the execution of towing. Of course, the transition of the steering rod unit 2 to the towing position can also be carried out in the state of control of the electric trailer; in addition, control is also possible in the semi-unfolded state.However, due to the fact that the distance between the support point of the first wheel 24 and the support point of application of the load of the seat 4 is too small, when a forward shift of the center of gravity occurs, the rear part of the structure may rise, which negatively affects safety, and therefore it is not recommended to carry out movement with a person placed in this state.

[0088] In general, the utility model implements the function of accommodating a person by installing a seat 4 in the upper part of the front end of the folding body of the trailer 1, which makes the use of the electric trailer less labor-intensive; at the same time, the steering rod unit 2 is connected to the folding body of the trailer 1 in a sliding manner, due to which the steering rod unit 2 can be extended, increasing the distance between the support point of the seat 4 and the support point of the first wheel 24, thereby increasing the stability when moving with the transportation of a person and improving the safety performance. In addition, a footrest 3 is provided in the front part of the folding body of the trailer 1, providing convenient placement of legs and the ability to move in a standing position, which expands the options for using the electric trailer. Moreover, the electric trailer is designed to be folded and stored, which increases the convenience of its transportation.

[0089] The utility model is not limited solely by the content of the description and embodiments set forth herein; thus, those skilled in the art will readily recognize the possibility of obtaining additional advantages and introducing modifications. Therefore, within the spirit and scope of the general concept defined by the claims of the utility model and their equivalents, the utility model is not limited to the specific details, representative devices, and illustrative examples shown and described above.

Claims

1. A folding electric trailer for transporting a person, including a folding trailer body, configured to fold in the longitudinal direction from front to back, wherein a seat is installed in the upper part of the front end of the folding trailer body, a steering rod unit is attached to the lower part of the front end of the folding trailer body, which is connected to two first wheels, second wheels are installed at the end of the folding trailer body remote from the steering rod unit, and a power source is provided on the folding trailer body, designed to supply electrical energy to the second wheels, as well as a controller designed to control the operation of the second wheels, wherein the folding trailer body includes a first cargo frame and a second cargo frame, one end of the first cargo frame is connected to one end of the second cargo frame, on each of the two lateral sides of the first cargo frame, respectively, a bracket unit is provided,wherein both ends of each bracket assembly are respectively connected to the support elements, the first load frame and the second load frame are designed with the possibility of folding relative to each other, with the simultaneous bringing of the bracket assemblies located on both sides into a folded state, 2. An electric trailer according to claim 1, characterized in that telescopic internal rods are mounted on both sides of one end of the first cargo frame with the possibility of sliding, wherein the telescopic internal rods are designed with the possibility of extending from the first cargo frame and moving the steering rod assembly away from the first cargo frame.

3. An electric trailer according to claim 1, characterized in that the steering rod assembly includes a transverse steering crossbar and a steering rod, wherein the first wheel is located under the transverse steering crossbar, a pivot rod is installed in the middle part of the transverse steering crossbar, which is designed to rotate horizontally relative to the transverse steering crossbar, the lower part of the pivot rod is connected to the first wheel, wherein the steering rod, by means of the pivot rod, sets the first wheel in a turning motion.

4. An electric trailer according to claim 3, characterized in that the steering rod assembly also includes a sleeve rod, where one end of the sleeve rod is pivotally connected to the upper part of the pivot rod, the steering rod is slidably located inside the sleeve rod, and the crossbar is pivotally connected to the telescopic inner rod.

5. An electric trailer according to paragraph 2, characterized in that a support frame is installed between two support elements located at the same ends of two bracket assemblies, horizontal connecting rods are installed in the upper parts of both ends of each bracket assembly on each side, respectively, and the upper parts of both ends of the bracket assembly are connected to the support elements by means of connecting rods.

6. An electric trailer according to paragraph 3, characterized in that the first wheels are made in the amount of two, wherein the first two wheels are respectively mounted on both ends of the steering crossbar, the end of the steering rod, remote from the steering rod, is movably connected to the steering rod, wherein both ends of the steering rod are respectively pivotally connected to the first two wheels.

7. An electric trailer according to paragraph 3, characterized in that at the lower ends of two support elements located near the steering rod assembly, respectively, vertical first guide grooves are formed, between the two first guide grooves a footboard is installed, while on both sides of the lower end of the footboard, respectively, first guide axles are provided, and the lower end of the footboard is slidingly connected to the first guide grooves by means of the first guide axles.

8. An electric trailer according to claim 7, characterized in that at least one folding limiting pin is provided in the inner part of the lower end of the lower surface of the footboard, which is intended to limit the translational movement of the steering rod unit in the folded state of the footboard, at least one hole for the pin is made on the upper surface of the crossbar, which is mated with the folding limiting pin, and in the middle part of the upper end of the footboard an unloading hole is additionally made, which is mated with the rotary rod.

9. An electric trailer according to claim 8, characterized in that at least one unfolded limiting pin is provided in the inner part of the upper end of the lower surface of the footboard, which is intended to limit the translational movement of the steering rod assembly in the unfolded state of the footboard, wherein the unfolded limiting pin is mated with the hole for the pin.

10. An electric trailer according to claim 4, characterized in that spaced apart rotating connecting eyes are formed in the upper part of the rotary rod, wherein an insertion hole is formed between the two rotating connecting eyes, a projection is provided at the lower end of the sleeve rod, wherein the projection is inserted between the two rotating connecting eyes and is pivotally connected to them by means of an axis of rotation, a folding limiting element is movably installed in the inner part of the lower end of the sleeve rod, wherein when the folding limiting element is compressed by the steering rod, one end of the folding limiting element comes out through the projection and enters the insertion hole, wherein the rotation of the sleeve rod relative to the rotary rod is limited.

11. An electric trailer according to paragraph 4, characterized in that a ring-shaped handrail is provided in the upper part of the steering rod, and folding grooves are respectively made on both sides of the ring-shaped handrail, a handle is pivotally mounted on one and the same end of the two folding grooves, and one of the handles is electrically connected to the controller and is intended to control the operating speed of the second wheels.

12. An electric trailer according to paragraph 11, characterized in that coaxial limiting holes are made on the side wall of the steering rod and on the side wall of the sleeve rod, respectively, a limiting locking pin is additionally installed inside the steering rod, mating with the limiting holes, a locking pin button is provided in the inner part of the lower end of the annular handrail, wherein the locking pin button brings the limiting locking pin to an extended or retracted state.

13. An electric trailer according to paragraph 3, characterized in that a braking device is additionally provided on the steering crossbar, wherein the braking device is connected to the first wheel.

14. An electric trailer according to paragraph 3, characterized in that at each point of the hinged connection of the telescopic inner rod with the crossbar, a folding limiting sleeve is additionally installed, while at the end of the folding limiting sleeve facing the crossbar, a return spring of the sleeve is provided, and the folding limiting sleeve, under the action of the elastic force of the return spring of the sleeve, is located in the area of ​​the connection of the telescopic inner rod with the crossbar.

15. An electric trailer according to claim 1, characterized in that the seat is made of a rigid material, wherein both ends of the seat are respectively pivotally connected to both sides of the upper part of the front end of the folding body of the trailer, and the seat is designed with the possibility of rotating forward or backward relative to the folding body of the trailer.

16. An electric trailer according to claim 1, characterized in that the seat is made of a flexible material, and the seat is located inside the upper part of the front end of the folding body of the trailer, and support rods are provided on the front side and / or on the rear side of the seat, connected to the folding body of the trailer.

17. An electric trailer according to claim 2, characterized in that the ends of the telescopic internal rods, remote from the second cargo frame, are pivotally connected to the steering rod assembly.

Images