Reinforcing structure of an electric folding cart

Abstract

A reinforcing structure for an electric folding cart is provided, comprising: a folding cart body, wherein wheels are arranged on the lower part of the folding cart body, a steering control device is further arranged on the folding cart body, reinforcement bar assemblies are respectively connected to two sides of the upper part of the folding cart body, and the reinforcement bar assemblies are detachably connected to the middle part of the folding cart body; and a seat device is further detachably arranged between the two reinforcement bar assemblies.By arranging the reinforcement bar assemblies on the body of the folding cart, its longitudinal and transverse movement is limited, improving its stability during use. Furthermore, the reinforcement bar assemblies also provide support points for attaching the seat unit, allowing a user to sit and drive the electric cart, thus enhancing user comfort. Additionally, the seat unit further limits the transverse movement of the two side frame assemblies, further improving the stability of the folding cart body and extending its service life.

Description

A reinforced structure of an electric folding cart Technical Field

[0001] The present invention relates to the technical field of foldable electric trailers, in particular to a reinforcement structure of an electric foldable cart. Background Art

[0002] A foldable trailer is a foldable and towable cargo vehicle. It is widely used in transporting things because of its simplicity of use, ability to carry cargo, ease of storage, and time and labor saving. It is now often used in outdoor activities or short-distance transportation.

[0003] Since existing folding electric trailers need to have a folding function, they are all achieved through a movable connection method. For example, Patent No. CN202222336784.8 (A Foldable Beach Trailer) discloses a chassis folding connecting seat, a chassis folding linkage tube, a folding lower seat and a folding upper seat, wherein the folding upper seat is arranged at the upper end of the folding lower seat, a side folding mechanism is arranged between the folding upper seat and the left and right sides of the folding lower seat, a telescopic mechanism is arranged between the folding lower seat and the folding upper seat, and a front and rear folding mechanism is arranged between the folding lower seat and the front and rear sides of the folding upper seat; from the drawings and the contents recorded in the specification, it can be seen that the middle part of the side folding mechanism is not connected to the chassis folding linkage tube, and the side folding mechanism is a double-fork type, and the chassis folding linkage tube is a single-fork structure, so that when it is in use, it will move outward due to the squeezing of the cargo, which can easily cause the side linkage tube and the connecting seat to be squeezed and deformed, resulting in a gap, which has a great impact on the subsequent stability of use.

[0004] Therefore, there is an urgent need to design a reinforced structure of an electric folding cart to overcome one or more of the above-mentioned deficiencies of the prior art. Summary of the Invention

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a reinforced structure of an electric folding cart, characterized in that it includes: a folding body, the folding body includes an end bracket assembly, a side bracket assembly, and a bottom bracket assembly; the end bracket assemblies are provided with two, and the two end bracket assemblies are spaced apart from each other; the side bracket assemblies are provided with two, and the two side bracket assemblies are arranged between the two end bracket assemblies, and the two side bracket assemblies are spaced apart; the front ends of the two side bracket assemblies are respectively rotatably connected to the end bracket assemblies at the front ends, and the two ends of each side bracket assembly can be folded toward the middle in the length direction; the bottom bracket assembly is provided with at least one, and the bottom bracket assembly is located between the two end bracket assemblies, and also Located between the two side bracket assemblies, the two ends of the bottom bracket assembly are respectively rotatably connected to the end bracket assemblies at the corresponding ends, and the bottom bracket assembly can be gathered toward the middle; wheels are provided at the bottom of the folding body, and the folding body is also provided with a steering device connected to the wheels for controlling the steering of the wheels, and the top two sides of the end bracket assembly at the front end are respectively connected with reinforcing rod assemblies, and the other end of the reinforcing rod assembly is connected to the end bracket assembly at the rear end, and the reinforcing rod assembly is also detachably connected to the side bracket assembly; a seat device is also detachably provided between the two reinforcing rod assemblies; a controller and a power supply are also provided on the folding body, and the power supply is connected to the controller, and the wheel at at least one end is connected to the controller.

[0006] In a preferred embodiment, each of the end bracket assemblies includes: a first X-shaped bracket, a supporting vertical rod; there are two supporting vertical rods, and each of the top and bottom ends of the supporting vertical rods is provided with a connecting seat, and the four ends of the first X-shaped bracket are rotatably connected to the corresponding connecting seats respectively; each of the side bracket assemblies includes: a second X-shaped bracket, and there is at least one second X-shaped bracket, and the second X-shaped bracket is rotatably connected to the connecting seat on the same side of the two end bracket assemblies.

[0007] In a preferred embodiment, the reinforcing rod assembly includes: a first reinforcing rod, a second reinforcing rod, and a connecting piece; one end of the first reinforcing rod is rotatably connected to the end bracket assembly at the front end, one end of the second reinforcing rod is rotatably connected to the first reinforcing rod through the connecting piece, and the other end of the second reinforcing rod is rotatably connected to the end bracket assembly at the rear end, and the first reinforcing rod and the second reinforcing rod can rotate respectively relative to the connecting piece.

[0008] In a preferred embodiment, a limiting structure is rotatably provided on the connecting member, and a limiting member is provided at a position of the side bracket assembly corresponding to the limiting structure, and the limiting structure cooperates with the limiting member to limit the folding of the reinforcing rod assembly.

[0009] In a preferred embodiment, the seat device is a hard plate structure, and both ends of the seat device are respectively provided with a slot adapted to the reinforcing rod assembly.

[0010] In a preferred embodiment, one end of the folding vehicle body is also connected to a pull rod assembly, the bottom of the pull rod assembly is rotatably connected to a strut adapter, one end of the strut adapter is rotatably connected to a first strut, and the other end of the strut adapter is connected to a second strut, and the first strut and the second strut are rotatably connected to the end bracket assembly at one end away from the strut adapter, respectively, the first strut and the second strut can be vertically rotated relative to the strut adapter and the end bracket assembly, respectively, and the pull rod assembly can be horizontally rotated relative to the strut adapter.

[0011] In a preferred embodiment, the first support rod and the second support rod or the end bracket assembly are further provided with a pedal rod.

[0012] In a preferred embodiment, the ends of the first strut and the second strut connected to the strut adapter are respectively provided with synchronous teeth, the two synchronous teeth are meshed with each other, and the top wall of the strut adapter is provided with an avoidance hole.

[0013] In a preferred embodiment, the pull rod assembly includes: a first folding member and a direction rod; the first folding member is rotatably connected to the strut adapter, and the first folding member can rotate horizontally relative to the strut adapter; the bottom of the direction rod is rotatably connected to the first folding member, and the direction rod can rotate vertically relative to the first folding member; the end bracket assembly at the front end is also provided with a clamp device for limiting the rotation of the direction rod relative to the first folding member.

[0014] In a preferred embodiment, the direction rod is a telescopic structure, a handle is provided on the top of the direction rod, a plurality of control buttons are provided on the handle, and the control buttons are connected to the controller.

[0015] In a preferred embodiment, the direction rod is further provided with a limit pin, and the limit pin is used to limit the extension and retraction of the direction rod.

[0016] In a preferred embodiment, the direction control device includes: a transmission rod; a plurality of transmission rods are provided, and the plurality of transmission rods are rotatably connected head to tail in sequence, and the head end and the tail end of the transmission rods after being connected are respectively rotatably connected to the corresponding wheels, and a swing arm is further connected to the bottom of the pull rod assembly, and the end of the swing arm away from the pull rod assembly is rotatably connected to the transmission rod located in the middle, and when the pull rod assembly rotates horizontally, it drives the swing arm to swing, and the swing arm drives the transmission rod to move.

[0017] In a preferred embodiment, the direction control device includes: an angle sensor, which is provided on the pull rod assembly and connected to the controller. When the pull rod assembly rotates horizontally, the angle sensor identifies the rotation direction and angle of the pull rod assembly.

[0018] The beneficial effects of the present invention are: by arranging a reinforcing rod assembly on the folding body, the movement of the two side bracket assemblies in the length direction and the lateral direction is limited, thereby improving the stability of the folding body during use; at the same time, the reinforcing rod assembly also provides a support point for placing the seat device, so that the user can sit and drive the electric stroller, thereby improving the comfort of use of the electric stroller; and the seat device can further limit the lateral movement of the two side bracket assemblies, further improving the stability of the folding body, and extending the service life of the folding body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic structural diagram of the present invention;

[0020] FIG2 is a schematic structural diagram of the foldable vehicle body of the present invention;

[0021] FIG3 is a schematic structural diagram of a reinforcing rod assembly according to the present invention;

[0022] FIG4 is a schematic structural diagram of a seat device according to the present invention;

[0023] FIG5 is a schematic diagram of the cooperation between the pull rod assembly and the direction control device of the present invention;

[0024] FIG6 is a schematic structural diagram of a first brace and a second brace of the present invention;

[0025] FIG7 is a schematic diagram of the folded state of the present invention.

[0026] In the picture:

[0027] 10. Folding body; 101. End bracket assembly; 1011. First X-shaped bracket; 1012. Support vertical rod; 1013. Connecting seat; 1014. Clamp assembly; 102. Side bracket assembly; 1021. Second X-shaped bracket; 1022. Stopper; 103. Bottom bracket assembly; 11. Wheel; 12. Steering device; 121. Transmission rod; 13. Reinforcement rod assembly; 131. First reinforcement rod; 132. Second reinforcing rod; 133. Connecting piece; 134. Limiting structure; 14. Seat device; 141. Slot; 15. Pull rod assembly; 151. First folding piece; 152. Steering rod; 153. Handle; 154. Limiting pin; 155. Hole; 156. Swing arm; 16. Strut connecting piece; 161. First strut; 162. Second strut; 163. Synchronous gear; 164. Avoidance hole. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0030] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0031] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0032] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing at various points in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "comprises," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized. The present invention is therefore not limited to the specific embodiments disclosed below.

[0033] As shown in Figures 1 to 7, the present invention provides a reinforced structure of an electric folding cart, characterized in that it includes: a folding body 10, the folding body 10 includes an end bracket assembly 101, a side bracket assembly 102, and a bottom bracket assembly 103; the end bracket assembly 101 is provided with two, and the two end bracket assemblies 101 are spaced apart from each other, and the side bracket assemblies 102 are provided with two, and the two side bracket assemblies 102 are arranged between the two end bracket assemblies 101, and the two side bracket assemblies 102 are spaced apart, and the front ends of the two side bracket assemblies 102 are rotatably connected to the end bracket assemblies 101 at the front ends, and the two ends of each side bracket assembly 102 can be folded toward the middle in the length direction, and at least one bottom bracket assembly 103 is provided, and the bottom bracket assembly 103 is located between the two end bracket assemblies 101 and also between the two side bracket assemblies 102. The two ends of the bottom bracket assembly 103 are rotatably connected to the end bracket assembly 101 at the corresponding end, and the bottom bracket assembly 103 can be gathered towards the middle; the bottom of the folding vehicle body 10 is provided with a wheel 11, and the folding vehicle body 10 is also provided with a steering device 12 connected to the wheel 11 for controlling the steering of the wheel 11, and the top two sides of the end bracket assembly 101 at the front end are respectively connected with a reinforcing rod assembly 13, and the other end of the reinforcing rod assembly 13 is connected to the end bracket assembly 101 at the rear end, and the reinforcing rod assembly 13 can be folded from the middle, and the reinforcing rod assembly 13 is also detachably connected to the side bracket assembly 102; a seat device 14 is also detachably provided between the two reinforcing rod assemblies 13; the folding vehicle body 10 is also provided with a controller (not shown in the figure) and a power supply (not shown in the figure), the power supply is connected to the controller, and the wheel 11 at at least one end is connected to the controller;

[0034] Specifically, the folding body 10 is composed of two side bracket assemblies 102, two end bracket assemblies 101, and a bottom bracket assembly 103 surrounding the rectangular folding body 10 with an open top. The folding body 10 can be gathered from the front, back, left, and right to the middle to reduce the space occupied by the folding body 10 when there is no need to use it, thereby improving the portability of the electric cart. Wheels 11 are respectively provided at both ends of the bottom of the folding body 10, and the wheel 11 at one end is used to control the driving direction of the electric cart. In order to improve the loading stability, carrying capacity and service life of the folding body 10, the two end bracket assemblies 1 The two sides of 01 are respectively connected with a reinforcing rod assembly 13, and the middle part of the reinforcing rod assembly 13 is also detachably connected to the side bracket assembly 102. When needed, it can be fixed with the side bracket assembly 102, and can be removed when not needed. By setting the reinforcing rod assembly 13, the end bracket assemblies 101 and the side bracket assemblies 102 at both ends are connected together to form a rigid structure to limit the outward expansion of the side bracket assembly 102. Since the folding body 10 is foldable, in order to avoid the reinforcing rod assembly 13 limiting the folding of the folding body 10, the reinforcing rod assembly 13 can be folded from the middle. When the folding body 10 is folded, When not in use, the connection between the middle part of the reinforcing rod assembly 13 and the side bracket assembly 102 can be untied, and then the folding body 10 can be folded. At this time, the two ends of the reinforcing rod assembly 13 are squeezed and folded synchronously from the middle, thereby avoiding affecting the folding of the folding body 10. In order to improve the user experience and comfort during use, a seat device 14 can be detachably connected to one end of the two reinforcing rod assemblies 13. The seat device 14 can be used for the user to sit on the folding body 10 and can be removed when not in use to avoid affecting use. The folding body 10 is also provided with a control for controlling the operation of the wheel 11 The foldable vehicle body 10 is equipped with a wheel hub motor and a power source for providing electrical energy to the wheel 11. The wheel 11 at at least one end has a hub motor inside and is connected to the controller to realize the electrification of the foldable vehicle body 10. When in use, the user can sit on the seat device 14 to drive the foldable vehicle body 10. In order to control the driving direction of the foldable vehicle body 10 according to needs, a direction control device 12 is also provided on the wheel 11 at one end. The direction control device 12 controls the direction of the wheel 11. The direction control method can be mechanical structure control or control through the differential speed of the wheel 11; and the driving control of the vehicle body can also be remote control.

[0035] Furthermore, each of the end bracket assemblies 101 includes: a first X-shaped bracket 1011 and a support vertical rod 1012; two support vertical rods 1012 are provided, and a connecting seat 1013 is provided at the top and bottom ends of each support vertical rod 1012, and the four ends of the first X-shaped bracket 1011 are rotatably connected to the corresponding connecting seats 1013; each of the side bracket assemblies 102 includes: a second X-shaped bracket 1021, and at least one second X-shaped bracket 1021 is provided, and the second X-shaped bracket 1021 is rotatably connected to the connecting seat 1013 on the same side of the two end bracket assemblies 101;

[0036] Specifically, each end bracket assembly 101 includes a first X-shaped bracket 1011, which can be folded or unfolded relative to each other around the intersection, and the four ends of the first X-shaped bracket 1011 are rotatably connected to the connecting seats 1013, and the two connecting seats 1013 on the same side are fixedly connected to the supporting vertical rod 1012, and the two supporting vertical rods 1012 are parallel to each other or unfolded when the first X-shaped bracket 1011 is folded or unfolded; each side bracket assembly 102 includes: at least one second X-shaped bracket 1021, the second X-shaped bracket 1021 can also be folded or unfolded relative to each other around the intersection, and the second X-shaped bracket 1021 also has four ends. When there is only one second X-shaped bracket 1021, the second X-shaped bracket 1021 is rotatably connected to the four connecting seats 1013 on the same side of the two end bracket assemblies 101, and when there are two second X-shaped brackets 1021, the two second X-shaped brackets 1021 are rotatably connected. One end of the X-shaped bracket 1021 is rotatably connected, and the two second X-shaped brackets 1021 connected together form a whole. The front end of the whole is rotatably connected to the connecting seat 1013 at the front end, and the rear end is rotatably connected to the connecting seat 1013 at the rear end. The bottom bracket assembly 103 is composed of four connecting rods and a mounting seat. The four connecting rods are rotatably connected to the mounting seat respectively. The bottom bracket assembly 103 is also provided with at least one. When there is only one, the ends of the four connecting rods away from the mounting seat are rotatably connected to the corresponding connecting seat 1013 respectively. When there are two bottom bracket assemblies 103, one side of the two bottom bracket assemblies 103 is respectively rotatably connected to the middle bottom of the side bracket assembly 102. When folded, each bottom bracket assembly 103 arches from its own middle part and the four connecting rods gather together, pulling the end bracket assembly 101 together, and the end bracket assembly 101 drives the side bracket assembly 102 to fold, thereby realizing the overall folding of the folding body 10.

[0037] It should be pointed out that the supporting vertical rod 1012 is a telescopic structure to adapt to the height difference generated when the first X-shaped bracket 1011 is folded, and when there are two second X-shaped brackets 1021, the connection between the two second X-shaped brackets 1021 overlaps. This structure can effectively prevent the second X-shaped bracket 1021 from falling down when it is under heavy pressure.

[0038] Furthermore, in this embodiment, the reinforcing rod assembly 13 includes: a first reinforcing rod 131, a second reinforcing rod 132, and a connecting piece 133; one end of the first reinforcing rod 131 is rotatably connected to the end bracket assembly 101 at the front end, one end of the second reinforcing rod 132 is rotatably connected to the first reinforcing rod 131 through the connecting piece 133, and the other end of the second reinforcing rod 132 is rotatably connected to the end bracket assembly 101 at the rear end, and the first reinforcing rod 131 and the second reinforcing rod 132 can respectively rotate relative to the connecting piece 133;

[0039] Specifically, the first reinforcing rod 131 and the second reinforcing rod 132 are connected together by a connecting piece 133, and the first reinforcing rod 131 and the second reinforcing rod 132 are respectively rotatably connected to the connecting piece 133, and can be rotated vertically relative to the connecting piece 133, so that when the folding body 10 is folded, the first reinforcing rod 131 and the second reinforcing rod 132 can be folded synchronously by squeezing, and when the folding body 10 is unfolded, the reinforcing rod assembly 13 is synchronously pulled and straightened, and then by fixing the connecting piece 133 to the side bracket assembly 102, the stability of the folding body 10 in the length and width directions is improved through the restriction of the reinforcing rod assembly 13.

[0040] Furthermore, a limiting structure 134 is rotatably provided on the connecting member 133, and a limiting member 1022 is provided at a position of the side bracket assembly 102 corresponding to the limiting structure 134. The limiting structure 134 cooperates with the limiting member 1022 to limit the folding of the reinforcing rod assembly 13;

[0041] Specifically, in order to connect the end bracket assembly 101 with the side bracket assembly 102, a limiting structure 134 is rotatably provided on the connecting piece 133. The limiting structure 134 can be horizontally rotated on the connecting piece 133. At the same time, when the side bracket assembly 102 and the reinforcing rod assembly 13 are in the unfolded state, a limiting piece 1022 is provided at the corresponding position of the side bracket assembly 102 and the connecting piece 133. The limiting structure 134 cooperates with the limiting piece 1022. There are many ways to cooperate. In this embodiment, for the sake of ease of understanding, the following is specifically disclosed. In one of them, the limiting structure 134 is a rotary handle, and a through hole adapted to the rotary handle is provided on the limiting member 1022. When the side bracket assembly 102 and the reinforcing rod assembly 13 are both in the unfolded state, the rotary handle can pass through the through hole, and then the rotary handle is rotated to make it staggered with the through hole. At this time, the rotary handle cannot be separated from the limiting member 1022 through the through hole, thereby realizing the connection and cooperation between the reinforcing rod assembly 13 and the side bracket assembly 102, connecting the side bracket assembly 102 with the end bracket assembly 101, thereby improving the stability of the folding bicycle.

[0042] Among them, the setting of the limiting member 1022, when there are two side bracket assemblies 102, the limiting member 1022 is set at the position where the two side bracket assemblies 102 are connected. When there is only one side bracket assembly 102, the limiting effect can be completed by the reinforcement rod assembly 13 itself, such as adding a spring pin in the connecting member 133. When the handle is rotated, the pin is pushed out and inserted into the first reinforcement rod 131 and the second reinforcement rod 132, limiting the rotation of the first reinforcement rod 131 and the second reinforcement rod 132, and also achieving the limiting effect. The return of the pin is achieved by the spring.

[0043] Furthermore, the seat device 14 is a hard plate structure, and both ends of the seat device 14 are respectively provided with a slot 141 adapted to the reinforcing rod assembly 13;

[0044] Specifically, in order to further improve the stability of the folding body 10 on the basis of the above-mentioned structure, the seat device 14 in this embodiment is preferably a hard structure, such as a wooden board plus a cushion, and a card slot 141 adapted to the reinforcing rod assembly 13 is provided at both ends of the seat device 14. The seat device 14 is detachably connected to the reinforcing rod assembly 13 through the card slot 141. Since the seat device 14 is a hard plate structure, it itself has thrust and tension. Through the setting of the card slot 141, the force is applied to the reinforcing rod assembly 13, and then acts on the side bracket assembly 102 through the reinforcing rod assembly 13, thereby further limiting the lateral deformation of the side bracket assembly 102, and the vertical deformation is limited by the reinforcing rod assembly 13.

[0045] It should be pointed out that in order to prevent the seat device 14 from sliding on the reinforcing rod assembly 13, a plug-in column (not shown in the figure) can be provided in the slot 141 of the seat device 14, and a socket (not shown in the figure) can be provided on the first reinforcing rod 131 and / or the second reinforcing rod 132. By cooperating with the plug-in column and the socket, the sliding of the seat device 14 is restricted, thereby improving safety during use.

[0046] Furthermore, in this embodiment, one end of the folding body 10 is further connected to a pull rod assembly 15, the bottom of the pull rod assembly 15 is rotatably connected to a strut adapter 16, one end of the strut adapter 16 is rotatably connected to a first strut 161, and the other end of the strut adapter 16 is connected to a second strut 162, the first strut 161 and the second strut 162 are rotatably connected to the end bracket assembly 101 at one end away from the strut adapter 16, the first strut 161 and the second strut 162 can be vertically rotated relative to the strut adapter 16 and the end bracket assembly 101, respectively, and the pull rod assembly 15 can be horizontally rotated relative to the strut adapter 16;

[0047] Specifically, in order to improve the safety and control convenience of the electric cart during driving, a pull rod assembly 15 is further connected to one end of the folding body 10, and the pull rod assembly 15 is used to control the driving direction of the folding body 10 and tow it. A support rod adapter 16 is also rotatably provided at the bottom of the pull rod assembly 15, and the pull rod assembly 15 can rotate horizontally relative to the support rod adapter 16 to facilitate turning operations. A first support rod 161 is rotatably connected to one end of the support rod adapter 16, and a second support rod 162 is rotatably connected to the other end of the support rod adapter 16. The first support rod 161 and the second support rod 162 can respectively rotate vertically relative to the support rod adapter 16, and the first support rod 161 and the second support rod 162 are separated from one end of the support rod adapter 16. The first and second struts 161 and 162 are rotatably connected to the corresponding connecting seats 1013, so that the pull rod assembly 15 is supported by the first and second struts 161 and 162. Since the first and second struts 161 and 162 are rotatably connected to the connecting seats 1013 and the strut adapter 16 respectively, when the folding body 10 is folded, the first and second struts 161 and 162 can also be rotated and folded to avoid affecting the folding of the folding body 10. In order to facilitate folding, there is a predetermined angle between the first and second struts 161 and 162, that is, the first and second struts 161 and 162 are arched. In this state, as long as the folding body 10 is folded, the first and second struts 161 and 162 will be squeezed and rotated and folded synchronously, which is simple and convenient to use.

[0048] Furthermore, the first support rod 161 and the second support rod 162 or the end bracket assembly 101 are further provided with a step rod (not shown in the figure);

[0049] Specifically, when the user sits on the seat device 14 to drive, in order to facilitate the user to put his feet, a pedal rod is respectively provided on the first support rod 161 and the second support rod 162 or the two connecting seats 1013 at the bottom of the end bracket assembly 101 at the front end. Preferably, the pedal rod is limited to rotate so that the pedal rod can be rotated to a certain angle when needed to be used, so as to facilitate putting feet, and can be rotated and folded when not in use.

[0050] Furthermore, in this embodiment, the ends of the first support rod 161 and the second support rod 162 connected to the support rod adapter 16 are respectively provided with synchronous teeth 163, and the two synchronous teeth 163 are meshed with each other. The top wall of the support rod adapter 16 is provided with an avoidance hole 164;

[0051] Specifically, the first support rod 161 and the second support rod 162 are connected together by the support rod adapter 16, and the two support rods can rotate vertically relative to the support rod adapter 16. Since the first support rod 161 and the second support rod 162 are not directly connected, the rotation angles of the two support rods will be different during rotation, causing the support rod adapter 16 to tilt, thereby causing the pull rod assembly 15 to tilt left and right. To avoid this situation, the first support rod 161 and the second support rod 162 are respectively embedded with a synchronous tooth 163 on one adjacent end. The two synchronous teeth 163 are engaged with each other, and the engagement of the gears limits the first support rod 161 and the second support rod 162 from rotating synchronously at the same angle, thereby ensuring that the pull rod assembly 15 is always in a vertical state. The avoidance hole 164 is used to avoid the synchronous tooth 163 when it is driven by the first support rod 161 and the second support rod 162 to avoid the synchronous tooth 163 from being restricted by the support rod adapter 16 and unable to rotate, so that the first support rod 161 and the second support rod 162 cannot be rotated into place.

[0052] Furthermore, in this embodiment, the pull rod assembly 15 includes: a first folding member 151 and a direction rod 152; the first folding member 151 is rotatably connected to the strut adapter 16, and the first folding member 151 can rotate horizontally relative to the strut adapter 16; the bottom end of the direction rod 152 is rotatably connected to the first folding member 151, and the direction rod 152 can rotate vertically relative to the first folding member 151; the front end bracket assembly 101 is further provided with a clamp device 1014 for limiting the rotation of the direction rod 152 relative to the first folding member 151;

[0053] Specifically, the pull rod assembly 15 includes: a first folding member 151, the first folding member 151 is rotatably connected to the support rod adapter 16, the first folding member 151 can rotate horizontally relative to the support rod adapter 16, the bottom end of the direction rod 152 is hinged to the top of the first folding member 151, and the direction rod 152 can rotate vertically relative to the first folding member 151. At the same time, a clamp device 1014 is provided in the middle of the first X-shaped bracket 1011 at the front end of the folding body 10. The clamp device 1014 is adapted to the direction rod 152 and is used to fix the direction rod 152 when the user sits on the seat device 14 to drive, so as to prevent it from rotating relative to the first folding member 151 and ensure safety during use.

[0054] Furthermore, in this embodiment, the direction rod 152 is a telescopic structure, and a handle 153 is provided at the top of the direction rod 152. The handle 153 is provided with a plurality of control buttons (not shown in the figure), and the control buttons are connected to the controller;

[0055] Specifically, the steering rod 152 adopts a telescopic structure, so that it has length adjustment. When installed at one end of the folding body 10, the height can be adjusted. A handle 153 is also provided at the top of the steering rod 152. The handle 153 is convenient for the user to hold. There are also several control buttons on the handle 153. The functions of the control buttons include but are not limited to: horn, turn signal, vehicle start, forward / reverse, speed control, braking, etc., among which the brake can be an electronic brake or a mechanical brake, such as a disc brake, drum brake, etc.; the speed control of the vehicle can adopt the traditional electric vehicle throttle handle 153 or a dial. The control principles are all existing conventional technologies, so they will not be repeated here.

[0056] Furthermore, in this embodiment, a limit pin 154 is further provided on the direction rod 152, and the limit pin 154 is used to limit the extension and retraction of the direction rod 152;

[0057] Specifically, a limit pin 154 is provided on the direction rod 152, and a clamping hole 155 is provided on the inner tube of the direction rod 152. The limit pin 154 is adapted to the clamping hole 155. The cooperation between the limit pin 154 and the clamping hole 155 limits the sliding of the direction rod 152.

[0058] Furthermore, in this embodiment, the steering device 12 includes: a transmission rod 121; a plurality of transmission rods 121 are provided, and the plurality of transmission rods 121 are rotatably connected in sequence end to end, and the head end and tail end of the connected transmission rods 121 are respectively rotatably connected to the corresponding wheels 11; the bottom of the pull rod assembly 15 is further connected to a swing arm 156, and the end of the swing arm 156 away from the pull rod assembly 15 is rotatably connected to the transmission rod 121 located in the middle. When the pull rod assembly 15 rotates horizontally, the swing arm 156 is driven to swing, and the swing arm 156 drives the transmission rod 121 to move;

[0059] Specifically, in this embodiment, the steering control device 12 includes: a transmission rod 121. A plurality of such transmission rods 121 are provided, and the plurality of transmission rods 121 are sequentially rotatably connected end to end. The transmission rods 121 can rotate relative to each other. Preferably, five transmission rods are provided, four long and one short, with the short one in the middle. After the connected transmission rods 121 rotate relative to each other, they can form a "Ji" shape to facilitate adapting to the space after the folding vehicle body 10 is folded. The connected transmission rods 121 form an integral body, and the front end and the rear end of this integral body are respectively rotatably connected to the corresponding wheels 11. A swing arm 156 is further provided at the bottom of the second folding member 151. The swing arm 156 is rotatably connected to the middle transmission rod 121. When the second folding member 151 rotates horizontally relative to the strut adapter 16, it drives the swing arm 156 to swing left and right. The swing arm 156 then drives the transmission rod 121 to move left and right, thereby pushing the wheels 11 to rotate left and right, achieving the orientation control of the wheels 11. The distance between the transmission rod 121 and the rotation center of the second folding member 151 needs to be equal to the distance between the transmission rod 121 and the rotation center of the wheels 11. At this time, there is no need to provide an avoidance slot on the swing arm 156 to ensure normal rotation.

[0060] Among them, the steering angle of the wheels 11 adopts the Ackermann principle. That is, when the wheels 11 turn, the steering angles of the two wheels 11 are not equal, which can be achieved by adjusting the connection position between the transmission rod 121 and the wheels 11, thereby reducing the wear of the wheels 11 and extending the service life of the wheels 11. Under the Ackermann principle, the two ends of the middle transmission rod 121 will interfere with the transmission rods 121 at both ends due to different torsion angles, which is likely to affect the service life. Therefore, the middle transmission rod 121 can be divided into two parts, with one end overlapping up and down, and the two parts can rotate relative to each other to avoid this problem.

[0061] It should be noted that the method using the transmission rod 121 can also be controlled electrically, that is, by adding a motor device such as a servo motor to push the transmission rod 121 to move.

[0062] Further, in another embodiment, the steering control device 12 includes: an angle sensor (not shown in the figure). The angle sensor is provided on the pull rod assembly 15. The angle sensor is connected to the controller. When the pull rod assembly 15 rotates horizontally, the angle sensor identifies the rotation direction and angle of the pull rod assembly 15.

[0063] Specifically, in this embodiment, the steering method adopts differential steering, and an angle sensor is installed on the pull rod assembly 15. The angle sensor is preferably an encoder, which is used to detect and identify the rotation angle and rotation direction of the steering rod 152, and send the detection data to the controller. After calculation, the controller controls the two wheels 11 with hub motors to produce a speed difference to change the direction of the folding body 10. If the steering rod 152 turns to the right, the speed of the left wheel 11 is greater than the speed of the right wheel 11, so that the folding body 10 swings to the right. In this way, the wheel 11 at the other end needs to be a universal wheel to ensure smooth steering.

[0064] In summary, the present invention limits the movement of the two side bracket assemblies 102 in the length and lateral directions by arranging a reinforcing rod assembly 13 on the folding body 10, thereby improving the stability of the folding body 10 during use. At the same time, the reinforcing rod assembly 13 also provides a support point for placing the seat device 14, so that the user can sit and drive the electric stroller, thereby improving the comfort of use of the electric stroller. The seat device 14 can also further limit the lateral movement of the two side bracket assemblies 102, further improve the stability of the folding body 10, and extend the service life of the folding body 10.

[0065] The present invention is not limited to what is described in the specification and embodiments, and additional advantages and modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein without departing from the spirit and scope of the general concept defined by the claims and their equivalents.

Claims

1. A reinforced structure of an electric folding cart, characterized in that: include: A folding bicycle body, the folding bicycle body comprises an end bracket assembly, a side bracket assembly and a bottom bracket assembly; the end bracket assembly is provided with two, and the two end bracket assemblies are spaced apart from each other in the front and rear; the side bracket assemblies are provided with two, and the two side bracket assemblies are spaced apart from each other; the front ends of the two side bracket assemblies are rotatably connected to the end bracket assemblies at the front ends respectively, and the two ends of each side bracket assembly can be folded toward the middle in the length direction; the bottom bracket assembly is provided with at least one, and the bottom bracket assembly is located between the two end bracket assemblies and also between the two side bracket assemblies; the two ends of the bottom bracket assembly The ends are rotatably connected with the end bracket assemblies at the corresponding ends, and the bottom bracket assembly can be gathered towards the middle; wheels are provided at the bottom of the folding body, and the folding body is also provided with a steering device connected to the wheels for controlling the steering of the wheels, and the top two sides of the end bracket assembly at the front end are respectively connected with reinforcing rod assemblies, and the other end of the reinforcing rod assembly is connected to the end bracket assembly at the rear end, and the reinforcing rod assembly is also detachably connected to the side bracket assembly; a seat device is also detachably provided between the two reinforcing rod assemblies; a controller and a power supply are also provided on the folding body, and the power supply is connected to the controller, and the wheel at at least one end is connected to the controller.

2. The reinforced structure of the electric folding cart according to claim 1, characterized in that: Each of the end bracket assemblies comprises: a first X-shaped bracket and a supporting vertical rod; two supporting vertical rods are provided, and a connecting seat is provided at the top and bottom ends of each supporting vertical rod, and the four ends of the first X-shaped bracket are rotatably connected to the corresponding connecting seats respectively; each of the side bracket assemblies comprises: a second X-shaped bracket, and at least one second X-shaped bracket is provided, and the second X-shaped bracket is rotatably connected to the connecting seat on the same side of the two end bracket assemblies.

3. The reinforced structure of the electric folding cart according to claim 1, characterized in that: The reinforcing rod assembly includes: a first reinforcing rod, a second reinforcing rod, and a connecting piece; one end of the first reinforcing rod is rotatably connected to the end bracket assembly at the front end, one end of the second reinforcing rod is rotatably connected to the first reinforcing rod through the connecting piece, and the other end of the second reinforcing rod is rotatably connected to the end bracket assembly at the rear end, and the first reinforcing rod and the second reinforcing rod can rotate respectively relative to the connecting piece.

4. The reinforced structure of the electric folding cart according to claim 3, characterized in that: A limiting structure is rotatably provided on the connecting member, and a limiting member is provided at a position of the side bracket assembly corresponding to the limiting structure. The limiting structure cooperates with the limiting member to limit the folding of the reinforcing rod assembly.

5. The reinforced structure of the electric folding cart according to claim 1, characterized in that: The seat device is a hard plate structure, and both ends of the seat device are respectively provided with slots adapted to the reinforcing rod assembly.

6. The reinforced structure of the electric folding cart according to claim 1, characterized in that: One end of the folding body is also connected to a pull rod assembly, the bottom of the pull rod assembly is rotatably connected to a strut adapter, one end of the strut adapter is rotatably connected to a first strut, and the other end of the strut adapter is connected to a second strut, the first strut and the second strut are rotatably connected to the end bracket assembly at one end away from the strut adapter, the first strut and the second strut can be vertically rotated relative to the strut adapter and the end bracket assembly respectively, and the pull rod assembly can be horizontally rotated relative to the strut adapter.

7. The reinforced structure of the electric folding cart according to claim 6, characterized in that: The first support rod and the second support rod or the end bracket assembly are also provided with a pedal rod.

8. The reinforced structure of the electric folding cart according to claim 6, characterized in that: The ends of the first support rod and the second support rod connected to the support rod adapter are respectively provided with synchronous teeth, the two synchronous teeth are meshed with each other, and the top wall of the support rod adapter is provided with an avoidance hole.

9. The reinforced structure of the electric folding cart according to claim 6, characterized in that: The pull rod assembly includes: a first folding member and a direction rod; the first folding member is rotatably connected to the support rod adapter, and the first folding member can rotate horizontally relative to the support rod adapter; the bottom of the direction rod is rotatably connected to the first folding member, and the direction rod can rotate vertically relative to the first folding member; the end bracket assembly at the front end is also provided with a clamp device for limiting the rotation of the direction rod relative to the first folding member.

10. The reinforced structure of the electric folding cart according to claim 9, characterized in that: The direction rod is a telescopic structure. A handle is provided at the top of the direction rod. A plurality of control buttons are provided on the handle. The control buttons are connected to the controller.

11. The reinforced structure of the electric folding cart according to claim 10, characterized in that: The direction rod is also provided with a limit pin, and the limit pin is used to limit the extension and retraction of the direction rod.

12. The reinforced structure of the electric folding cart according to claim 6, characterized in that: The direction control device includes: a transmission rod; a plurality of transmission rods are provided, and the plurality of transmission rods are rotatably connected head to tail in sequence, and the head end and the tail end of the transmission rods after being connected are respectively rotatably connected to the corresponding wheels, and a swing arm is also connected to the bottom of the pull rod assembly, and one end of the swing arm away from the pull rod assembly is rotatably connected to the transmission rod located in the middle, and when the pull rod assembly rotates horizontally, the swing arm is driven to swing, and the swing arm drives the transmission rod to move.

13. The reinforced structure of the electric folding cart according to claim 6, characterized in that: The direction control device includes: an angle sensor, which is arranged on the pull rod assembly and connected to the controller. When the pull rod assembly rotates horizontally, the angle sensor identifies the rotation direction and angle of the pull rod assembly.