Structure capable of enhancing stability of electric folding cart

Abstract

The utility model discloses a structure capable of enhancing stability of an electric folding cart, which comprises a folding cart body, wheels are arranged at the bottom of the folding cart body, the folding cart body is further provided with a direction control device connected with the wheels and used for controlling the wheels to steer, and a seat device is further detachably arranged between two side support assemblies. The seat device limits the side support assembly to move in the length direction and the width direction of the folding vehicle body. A controller and a power source are further arranged on the folding trolley body, the power source is connected with the controller, and the wheels at least one end are connected with the controller. By the adoption of the design, the seat device and the limiting columns are arranged on the folding trolley body, and through cooperation of the seat device and the limiting columns, movement of the two side support assemblies in the length direction and the transverse direction is limited; the stability of the folding cart body during use is improved, the service life of the folding cart body is prolonged, meanwhile, the seat device further provides a sitting function, so that a user can sit to drive the electric cart, and the use comfort of the electric cart is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of folding electric trailers, in particular to a structure capable of enhancing the stability of an electric folding cart. Background Art

[0002] A folding trailer, a load-carrying vehicle that can be folded and towed, is widely used when carrying things because of its simple use, load-carrying capacity, convenient storage, time-saving and labor-saving features, and is now often used in outdoor activities or short-distance transportation.

[0003] Existing folding electric trailers need to be folded, so they are all realized by movable connection methods. For example, the patent number CN202222336784.8 (a foldable beach trailer) discloses a chassis folding connection seat, a chassis folding linkage pipe, a lower folding seat and an upper folding seat. The upper folding seat is arranged at the upper end of the lower folding seat. A side folding mechanism is arranged between the left and right of the upper folding seat and the lower folding seat. A telescopic mechanism is arranged between the lower folding seat and the upper folding seat. A front and rear folding mechanism is arranged between the front and rear of the lower folding seat and the upper folding seat. From the content recorded in the specification drawings and the specification, it can be seen that the middle part of its side folding mechanism is not connected to the chassis folding linkage pipe, and the side folding mechanism is in a double-fork shape, while the chassis folding linkage pipe is in a single-fork structure. As a result, when in use, it will move outwards due to the extrusion of goods, easily causing the side linkage pipe and the connection seat to be extruded and deformed, generating gaps, which has a great impact on the subsequent use stability.

[0004] Therefore, it is urgent to design a structure capable of enhancing the stability of an electric folding cart to overcome one or more of the above-mentioned deficiencies of the prior art. Summary of the Utility Model

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a structure capable of strengthening the stability of an electric folding stroller, characterized in that it comprises: a folding body, the folding body comprising 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 arranged at intervals in front and behind; 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 arranged at intervals, and 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, and the bottom bracket assembly is provided with at least one, 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 are rotatably connected to the end bracket assemblies at the corresponding ends respectively, and the bottom bracket assembly can be gathered toward the middle. Wheels are provided at the bottom of the folding body. The folding body is also provided with a steering device connected to the wheels for controlling the steering of the wheels. A seat device is also detachably provided between the two side bracket assemblies. The seat device limits the movement of the side bracket assembly along the length and width directions of the folding body. A controller and a power supply are also provided on the folding body. 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 comprises: a first X-shaped bracket, a supporting vertical rod; two supporting vertical rods are provided, and the top and bottom ends of each supporting vertical rod are provided with connecting seats, 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.

[0007] In a preferred embodiment, the seat device includes: a seat bracket, wherein both ends of the seat bracket are respectively provided with support feet, a first limiting groove adapted to the thickness of the second X-shaped bracket is opened in the first direction of the support feet, a second limiting groove is opened in the second direction of the support feet, the first direction is perpendicular to the second direction, and a limiting column is also provided on the side of the second X-shaped bracket, and the limiting column is adapted to the second limiting groove.

[0008] In a preferred embodiment, one end of the folding vehicle body is further connected with a pull rod assembly. The bottom of the pull rod assembly is rotatably connected with a support rod adapter. One end of the support rod adapter is rotatably connected with a first support rod, and the other end of the support rod adapter is connected with a second support rod. The ends of the first support rod and the second support rod away from the support rod adapter are respectively rotatably connected with the end support assembly. The first support rod and the second support rod can respectively rotate vertically relative to the support rod adapter and the end support assembly, and the pull rod assembly can rotate horizontally relative to the support rod adapter.

[0009] In a preferred embodiment, the first support rod and the second support rod or the end support assembly are further connected with a footrest.

[0010] In a preferred embodiment, the ends of the first support rod and the second support rod connected to the support rod adapter are respectively provided with synchronous teeth, and the two synchronous teeth are meshed with each other. An avoidance hole is formed in the top wall of the support rod adapter.

[0011] In a preferred embodiment, the pull rod assembly includes: a first folding member and a direction rod; the first folding member is rotatably connected with the support rod adapter, the first folding member can rotate horizontally relative to the support rod adapter, the bottom of the direction rod is rotatably connected with the first folding member, the direction rod can rotate vertically relative to the first folding member, and a clamping device for restricting the rotation of the direction rod relative to the first folding member is further provided on the front end support assembly.

[0012] In a preferred embodiment, the direction rod is a telescopic structure, a handle is provided at the top end of the direction rod, and a plurality of control buttons are provided on the handle. The control buttons are connected with the controller.

[0013] In a preferred embodiment, a limit pin is further provided on the direction rod, and the limit pin is used for restricting the telescopic movement of the direction rod.

[0014] In a preferred embodiment, the steering control device includes: a transmission rod; a plurality of transmission rods are provided, and the plurality of transmission rods are sequentially rotatably connected end to end. The head end and the tail end of the connected transmission rods are respectively rotatably connected with the corresponding wheels. A swing arm is further connected to the bottom of the pull rod assembly. One end of the swing arm away from the pull rod assembly is rotatably connected with the transmission rod located in the middle. When the pull rod assembly rotates horizontally, the swing arm is driven to swing, and the swing arm drives the transmission rod to move.

[0015] In a preferred embodiment, the steering control device includes: an angle sensor, the angle sensor is arranged on the pull rod assembly, the angle sensor is connected with the controller, and when the pull rod assembly rotates horizontally, the angle sensor identifies the rotation direction and angle of the pull rod assembly.

[0016] The beneficial effects of the utility model are as follows: By arranging a seat device and a limiting column on the folding vehicle body, through the cooperation of the seat device and the limiting column, the movement of the two side bracket assemblies in the length direction and the transverse direction is restricted, so as to improve the stability of the folding vehicle body during use, extend the service life of the folding vehicle body, and at the same time, the seat device also provides a sitting function, enabling the user to drive the electric trolley while sitting, and improving the use comfort of the electric trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the utility model;

[0018] Figure 2 is a schematic structural diagram of the folding vehicle body of the utility model;

[0019] Figure 3 is a schematic structural diagram of the seat device of the utility model;

[0020] Figure 4 is a schematic diagram of the cooperation between the pull rod assembly and the steering control device of the utility model;

[0021] Figure 5 is a schematic structural diagram of the first support rod and the second support rod of the utility model;

[0022] Figure 6 is a schematic diagram of the folded state of the utility model.

[0023] In the figure:

[0024] 10. Folding vehicle body; 101. End bracket assembly; 1011. First X-shaped bracket; 1012. Support vertical rod; 1013. Connecting seat; 1014. Clamping device; 102. Side bracket assembly; 1021. Second X-shaped bracket; 1022. Limiting part; 103. Bottom bracket assembly; 11. Wheel; 12. Steering control device; 121. Transmission rod; 13. Limiting column; 14. Seat device; 141. Seat bracket; 142. Support leg; 143. First limiting groove; 144. Second limiting groove; 15. Pull rod assembly; 151. First folding part; 152. Direction rod; 153. Handle; 154. Limiting pin; 155. Card hole; 156. Swing arm; 16. Bracket connecting piece; 161. First support rod; 162. Second support rod; 163. Synchronous tooth; 164. Avoidance hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be provided in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] In the description of the embodiments of the present utility model, 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 communication or an indirect communication through an intermediate medium. Among them, "fixing" means that they are connected to each other and the relative positional relationship after connection remains unchanged. The orientation terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only references to the direction of the accompanying drawings. Therefore, the orientation terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, 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 thus cannot be understood as a limitation on the embodiments of the present utility model.

[0027] In the embodiments of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0028] In the embodiments of the present utility model, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0029] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present utility model. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0030] As Figures 1-6 shown, the present utility model provides a reinforcing structure for an electric folding cart, which is characterized by comprising: a folding vehicle body 10, the folding vehicle body 10 including end support assemblies 101, side support assemblies 102, and bottom support assemblies 103; there are two end support assemblies 101, and the two end support assemblies 101 are arranged at intervals front and back; there are two side support assemblies 102, and the two side support assemblies 102 are arranged between the two end support assemblies 101, and the two side support assemblies 102 are arranged at intervals; the front ends of the two side support assemblies 102 are respectively rotatably connected to the front end support assembly 101; both ends of each side support assembly 102 can be folded towards the middle in the length direction; there is at least one bottom support assembly 103, the bottom support assembly 103 is located between the two end support assemblies 101 and also between the two side support assemblies 102, and both ends of the bottom support assembly 103 are respectively rotatably connected to the corresponding end support assembly 101, and the bottom support assembly 103 can be folded towards the middle; wheels 11 are provided at the bottom of the folding vehicle body 10, and the folding vehicle body 10 is further provided with a steering control device 12 connected to the wheels 11 for controlling the steering of the wheels 11; a seat device 14 is detachably provided between the two side support assemblies 102, and the seat device 14 restricts the movement of the side support assemblies 102 in the length direction and width direction of the folding vehicle body 10; a controller (not shown in the figure) and a power supply (not shown in the figure) are further provided on the folding vehicle body 10, the power supply is connected to the controller, and at least one end of the wheels 11 is connected to the controller;

[0031] Specifically, the folding vehicle body 10 is formed by two side bracket assemblies 102, two end bracket assemblies 101, and a bottom bracket assembly 103 surrounding a rectangular folding vehicle body 10 with an open top. The folding vehicle body 10 can gather towards the middle from the front, back, left, and right to reduce the occupied space of the folding vehicle body 10 when there is no usage requirement, improving the portability of the electric cart. Wheels 11 are respectively provided at both ends of the bottom of the folding vehicle body 10, and one of the wheels 11 is used to control the driving direction of the electric cart. To improve the load-carrying stability, carrying capacity, and service life of the folding vehicle body 10, a seat device 14 is detachably connected between the two side bracket assemblies 102. The setting of the seat device 14 can limit the expansion and contraction of the side bracket assemblies 102 in the length direction of the folding vehicle body 10 in the unfolded state. And since the seat device 14 spans above the two side bracket assemblies 102, the seat device 14 can also limit the offset of the side bracket assemblies 102 in the width direction of the folding vehicle body 10 in the unfolded state, thereby improving the stability of the folding vehicle body 10 during use. Also, when placing goods, the offset of the two side bracket assemblies 102 in opposite or away directions can be avoided through the limitation of the seat device 14, thus preventing the deformation of the side bracket assemblies 102 and extending the service life. Moreover, the seat device 14 can provide support for the user, allowing the user to sit on the folding vehicle body 10, improving the usage experience and comfort during use. A controller for controlling the operation of the wheels 11 and a power source for supplying electrical energy to the wheels 11 are also provided on the folding vehicle body 10. At least one of the wheels 11 is a wheel 11 with a hub motor inside and is connected to the controller to achieve the electrification of the folding vehicle body 10. During use, the user can sit on the seat device 14 and drive the folding vehicle body 10. To be able to control the driving direction of the folding vehicle body 10 according to requirements, a steering device 12 is also provided on one of the wheels 11. The steering device 12 controls the orientation of the wheel 11, and the orientation control method can be mechanical structure control or control by the differential of the wheels 11; and the driving control of the vehicle body can also be in a remote control manner.

[0032] Furthermore, each of the end bracket assemblies 101 includes: a first X-shaped bracket 1011 and a support vertical rod 1012; there are two support vertical rods 1012, and connection seats 1013 are provided at the top and bottom of each support vertical rod 1012. The four ends of the first X-shaped bracket 1011 are respectively rotatably connected to the corresponding connection seats 1013; each of the side bracket assemblies 102 includes: a second X-shaped bracket 1021, and there is at least one second X-shaped bracket 1021. The second X-shaped bracket 1021 is rotatably connected to the connection seats 1013 on the same side of the two end bracket assemblies 101.

[0033] Specifically, each end bracket assembly 101 includes a first X-shaped bracket 1011 which can be relatively folded or unfolded around the intersection point. Connecting seats 1013 are respectively rotatably connected to the four ends of the first X-shaped bracket 1011, and a support vertical rod 1012 is fixedly connected between two connecting seats 1013 on the same side. When the first X-shaped bracket 1011 is folded or unfolded, the two support vertical rods 1012 move closer in parallel or unfold in parallel. Each side bracket assembly 102 includes at least one second X-shaped bracket 1021 which can also be relatively folded or unfolded around the intersection point, 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. When there are two second X-shaped brackets 1021, one end of the two second X-shaped brackets 1021 is rotatably connected. After being connected together, the two second X-shaped brackets 1021 form an integral body. The front end of this integral body is rotatably connected to the front connecting seat 1013, and the rear end is rotatably connected to the rear connecting seat 1013. The bottom bracket assembly 103 is composed of four connecting rods and a mounting seat. The four connecting rods are respectively rotatably connected to the mounting seat. 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 respectively rotatably connected to the corresponding connecting seats 1013. When there are two bottom bracket assemblies 103, one side of each of the two bottom bracket assemblies 103 is respectively rotatably connected to the middle bottom of the side bracket assembly 102. When folding, each bottom bracket assembly 103 arches from its own middle part, and the four connecting rods gather together, pulling the end bracket assemblies 101 to gather, and the end bracket assemblies 101 drive the side bracket assemblies 102 to fold, thereby realizing the overall folding of the folding vehicle body 10.

[0034] It should be noted that the support 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 part of the two second X-shaped brackets 1021 coincides, and this structure can effectively prevent the second X-shaped bracket 1021 from sagging under heavy pressure.

[0035] Furthermore, in this embodiment, the seat device 14 includes a seat bracket 141. Support feet 142 are respectively provided at both ends of the seat bracket 141. A first limiting groove 143 adapted to the thickness of the second X-shaped bracket 1021 is provided in the first direction of the support foot 142. A second limiting groove 144 is provided in the second direction of the support foot 142. The first direction is perpendicular to the second direction. A limiting post 13 is also provided on the side of the second X-shaped bracket 1021, and the limiting post 13 is adapted to the second limiting groove 144.

[0036] Specifically, feet 142 are integrally provided at both ends of the seat bracket 141. A first limiting groove 143 is provided in the first direction at the bottom end of the foot 142, and a second limiting groove 144 is provided in the second direction. The first direction and the second direction are perpendicular to each other. The first limiting groove 143 is adapted to the second X-shaped bracket 1021. The foot 142 is sleeved on the second X-shaped bracket 1021 through the first limiting groove 143. The cooperation between the first limiting groove 143 and the second X-shaped bracket 1021 restricts the movement of the seat device 14 in the width direction of the folding vehicle body 10. At the same time, a limiting post 13 is provided on the side of the second X-shaped bracket 1021. The limiting post 13 is adapted to the second limiting groove 144. When the foot 142 is sleeved on the second X-shaped bracket 1021, the second limiting groove 144 is engaged with the limiting post 13 to restrict the movement of the seat device 14 in the length direction of the folding vehicle body 10. At the same time, since the seat device 14 is an integral structure, the seat device 14 can also restrict the movement of the second X-shaped bracket 1021 in the length direction of the folding vehicle body 10, avoiding the collapse and movement of the second X-shaped bracket 1021, thereby improving the use stability of the folding vehicle body 10.

[0037] It should be noted that the cooperation mode between the seat device 14 and the side bracket assembly 101 can also be to fixedly install a ring block adapted to the foot 142 on the side bracket assembly 101, and a part of the foot 142 can be directly inserted into the ring block. This method can also achieve the same effect.

[0038] Further, in this embodiment, a pull rod assembly 15 is further connected to one end of the folding vehicle body 10. A support rod adapter 16 is rotatably connected to the bottom of the pull rod assembly 15. A first support rod 161 is rotatably connected to one end of the support rod adapter 16, and a second support rod 162 is connected to the other end of the support rod adapter 16. The ends of the first support rod 161 and the second support rod 162 away from the support rod adapter 16 are respectively rotatably connected to the end bracket assembly 101. The first support rod 161 and the second support rod 162 can respectively rotate vertically relative to the support rod adapter 16 and the end bracket assembly 101, and the pull rod assembly 15 can rotate horizontally relative to the support rod adapter 16;

[0039] Specifically, to improve the safety and control convenience of the electric trolley during driving, a pull rod assembly 15 is also connected to one end of the folding vehicle body 10. The pull rod assembly 15 is used to control the driving direction of the folding vehicle body 10 and for towing. A support rod adapter 16 is rotatably provided at the bottom of the pull rod assembly 15. 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 rotate vertically relative to the support rod adapter 16 respectively. The ends of the first support rod 161 and the second support rod 162 away from the support rod adapter 16 are respectively rotatably connected to the corresponding connection seats 1013, thereby using the first support rod 161 and the second support rod 162 to support the pull rod assembly 15. And because the first support rod 161 and the second support rod 162 are respectively rotatably connected to the connection seat 1013 and the support rod adapter 16, when the folding vehicle body 10 is folded, the first support rod 161 and the second support rod 162 can also rotate and fold, avoiding affecting the folding of the folding vehicle body 10. And for easy folding, there is a predetermined angle between the first support rod 161 and the second support rod 162, that is, the first support rod 161 and the second support rod 162 are arched. In this state, as long as the folding vehicle body 10 is folded, the first support rod 161 and the second support rod 162 will rotate and fold synchronously when being squeezed, which is simple and convenient to use.

[0040] Further, a footrest bar (not shown in the figure) is also provided on the first support rod 161 and the second support rod 162 or the end support assembly 101;

[0041] Specifically, when the user is driving while sitting on the seat device 14, to facilitate the user to rest their feet, footrest bars are respectively provided on the first support rod 161 and the second support rod 162 or on the two connection seats 1013 or the support vertical rods 1012 at the bottom of the front end support assembly 101. Preferably, the footrest bar is limited in rotation, so that the footrest bar can rotate a certain angle to unfold when needed for resting the feet, and can rotate and fold up when not in use.

[0042] Further, in this embodiment, synchronizing teeth 163 are respectively provided at the ends of the first support rod 161 and the second support rod 162 connected to the support rod adapter 16. The two synchronizing teeth 163 are engaged with each other, and an avoidance hole 164 is opened on the top wall of the support rod adapter 16;

[0043] Specifically, the first strut 161 and the second strut 162 are connected together through a strut adapter 16, and the two struts can rotate vertically relative to the strut adapter 16. Since the first strut 161 and the second strut 162 are not directly connected, the rotation angles of the two struts will be different when rotating, causing the strut adapter 16 to tilt, thereby causing the tie rod assembly 15 to tilt left and right. To avoid this situation, synchronous teeth 163 are respectively embedded at the adjacent ends of the first strut 161 and the second strut 162, and the two synchronous teeth 163 are meshed. The meshing of the gears restricts the first strut 161 and the second strut 162 to rotate synchronously and at the same angle, thereby ensuring that the tie rod assembly 15 is always in a vertical state. The avoidance hole 164 is used to avoid the position of the synchronous teeth 163 when the synchronous teeth 163 are driven by the first strut 161 and the second strut 162, so as to prevent the synchronous teeth 163 from being unable to rotate due to the restriction of the strut adapter 16, resulting in the first strut 161 and the second strut 162 not being able to rotate in place.

[0044] Further, in this embodiment, the tie 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, 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, the direction rod 152 can rotate vertically relative to the first folding member 151, and a clamping device 1014 for restricting the direction rod 152 from rotating relative to the first folding member 151 is further provided on the front end bracket assembly 101.

[0045] Specifically, the tie rod assembly 15 includes: a first folding member 151, the first folding member 151 is rotatably connected to the strut adapter 16, the first folding member 151 can rotate horizontally relative to the strut adapter 16, the bottom end of the direction rod 152 is hinged to the top of the first folding member 151, the direction rod 152 can rotate vertically relative to the first folding member 151. At the same time, a clamping device 1014 is provided in the middle of the first X-shaped bracket 1011 at the front end of the folding vehicle body 10. The clamping device 1014 is adapted to the direction rod 152 and is used to fix the direction rod 152 when the user is driving while sitting on the seat device 14, so as to prevent it from rotating relative to the first folding member 151 and ensure safety during use.

[0046] Further, in this embodiment, the direction rod 152 is a telescopic structure, a handle 153 is provided at the top end of the direction rod 152, and a plurality of control buttons (not shown in the figure) are provided on the handle 153, and the control buttons are connected to the controller.

[0047] Specifically, the steering rod 152 adopts a telescopic structure, enabling it to adjust its length. When installed at one end of the folding vehicle body 10, it can adjust the height. A handle 153 is also provided at the top of the steering rod 152 for the user to hold. Several control buttons are further provided on the handle 153. The functions of the control buttons include but are not limited to: horn, turn signal, vehicle start, forward / backward, speed control, braking, etc. Among them, the braking can be electronic braking or mechanical braking, such as disc brakes, drum brakes, etc.; the speed control can be achieved by using a traditional electric vehicle handle 153 or finger shifters. The control principles are all conventional existing technologies, so they will not be elaborated here.

[0048] Further, in this embodiment, a limit pin 154 is also provided on the steering rod 152, and the limit pin 154 is used to limit the telescopic movement of the steering rod 152.

[0049] Specifically, a limit pin 154 is provided on the steering rod 152. At the same time, a locking hole 155 is provided on the inner tube of the steering rod 152. The limit pin 154 is adapted to the locking hole 155. Through the cooperation of the limit pin 154 and the locking hole 155, the sliding of the steering rod 152 is restricted.

[0050] Further, in this embodiment, the steering control device 12 includes: a transmission rod 121; several transmission rods 121 are provided. The several transmission rods 121 are sequentially rotatably connected end to end. The front end and the rear end of the connected transmission rods 121 are respectively rotatably connected to the corresponding wheels 11. A swing arm 156 is further connected to the bottom of the pull rod assembly 15. One 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, it drives the swing arm 156 to swing, and the swing arm 156 drives the transmission rod 121 to move.

[0051] Specifically, in this embodiment, the steering 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 arranged, 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 first folding member 151, and this swing arm 156 is rotatably connected to the middle transmission rod 121. When the first folding member 151 rotates horizontally relative to the strut adapter 16, it drives the swing arm 156 to swing left and right, and 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 to achieve the control of the orientation of the wheels 11. The distance between the transmission rod 121 and the rotation center of the first folding member 151 needs to be equal to the distance between the transmission rod 121 and the rotation center of the wheels 11. In this case, there is no need to provide an avoidance groove on the swing arm 156 to ensure normal rotation.

[0052] 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, so as to reduce the wear of the wheels 11 and extend 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.

[0053] 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 make it push the transmission rod 121 to move.

[0054] Further, in another embodiment, the steering device 12 includes: an angle sensor (not shown in the figure). The angle sensor is provided on the pull rod assembly 15, and 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.

[0055] Specifically, in this embodiment, the steering method adopts differential steering. 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 direction rod 152, and send the detection data to the controller. After calculation, the controller controls the two wheels 11 with hub motors to generate a speed difference, so as to change the orientation of the folding vehicle body 10. For example, if the direction rod 152 turns to the right, the speed of the left wheel 11 is greater than that of the right wheel 11, causing the folding vehicle body 10 to swing to the right. In this way, the wheel 11 at the other end needs to be a universal wheel to ensure smooth steering.

[0056] In summary, the present utility model sets a seat device and a limit post on the folding vehicle body. Through the cooperation of the seat device and the limit post, the movement of the two side bracket assemblies in the length direction and the transverse direction is restricted, so as to improve the stability of the folding vehicle body during use and extend the service life of the folding vehicle body. At the same time, the seat device also provides a seating function, enabling the user to drive the electric cart while sitting, thus improving the comfort of using the electric cart.

[0057] The present utility model is not limited solely to what is described in the specification and embodiments. Therefore, for those skilled in the art, additional advantages and modifications can be easily achieved. Thus, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present utility model is not limited to the specific details, representative devices, and illustrated examples shown and described herein.

Claims

1. A structure capable of enhancing the stability of an electric folding cart, It is 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 is also located between the two end bracket assemblies The two ends of the bottom bracket assembly are rotatably connected to the end bracket assemblies at the corresponding ends respectively, 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. A seat device can be detachably provided between the two side bracket assemblies, and the seat device limits the movement of the side bracket assembly along the length and width directions of the folding body; 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 structure capable of enhancing the stability of the electric folding stroller according to claim 1, It is 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 structure capable of enhancing the stability of the electric folding stroller according to claim 2, It is characterized in that The seat device includes: a seat bracket, wherein two ends of the seat bracket are respectively provided with supporting feet, a first limiting groove adapted to the thickness of the second X-shaped bracket is opened in a first direction of the supporting feet, a second limiting groove is opened in a second direction of the supporting feet, the first direction is perpendicular to the second direction, and a limiting column is further provided on the side of the second X-shaped bracket, and the limiting column is adapted to the second limiting groove.

4. The structure capable of enhancing the stability of the electric folding stroller according to claim 1, It is 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.

5. The structure capable of enhancing the stability of the electric folding cart according to claim 4, wherein, a footrest rod is further connected to the first support rod and the second support rod or the end support assembly.

6. The structure capable of enhancing the stability of the electric folding cart according to claim 4, wherein, synchronization teeth are respectively provided at one ends of the first support rod and the second support rod connected to the support rod adapter, and the two synchronization teeth are meshed with each other. An avoidance hole is formed in the top wall of the support rod adapter.

7. The structure capable of enhancing the stability of the electric folding cart according to claim 4, wherein, 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, 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, the direction rod can rotate vertically relative to the first folding member, and a clamping device for restricting the rotation of the direction rod relative to the first folding member is further provided on the front end support assembly.

8. The structure capable of enhancing the stability of the electric folding cart according to claim 7, wherein, the direction rod is a telescopic structure, a handle is provided at the top end of the direction rod, and a plurality of control buttons are provided on the handle, and the control buttons are connected to the controller.

9. The structure capable of enhancing the stability of the electric folding cart according to claim 7, wherein, a limit pin is further provided on the direction rod, and the limit pin is used to limit the telescopic movement of the direction rod.

10. The structure capable of enhancing the stability of the electric folding cart according to claim 4, wherein, the steering device includes: transmission rods; a plurality of transmission rods are provided, and the plurality of transmission rods are sequentially rotatably connected end to end. The head end and the tail end after the transmission rods are connected are respectively rotatably connected to the corresponding wheels. A swing arm is further 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. When the pull rod assembly rotates horizontally, the swing arm is driven to swing, and the swing arm drives the transmission rod to move.

11. The structure capable of enhancing the stability of the electric folding cart according to claim 4, wherein, the steering device includes: an angle sensor, the angle sensor is provided on the pull rod assembly, the angle sensor is connected to the controller, and when the pull rod assembly rotates horizontally, the angle sensor identifies the rotation direction and angle of the pull rod assembly.

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