Assemblable steering system for collapsible wagon

Abstract

An assemblable steering system for a collapsible wagon, comprising: two wheels (10), a support base (11) being provided above each wheel (10); a support rod assembly (12) is provided between the two support bases (11); a steering rod assembly (13) is movably connected to the middle of the support rod assembly (12); at least one same end of the two wheels (10) is provided with a linkage member (15) between the two wheels (10); the bottom portion of the steering rod assembly (13) is at least connected to the linkage member (15); and each support base (11) is further provided with an assembly member (14).

Description

A folding trailer assembled steering system Technical Field

[0001] The utility model relates to the technical field of trailers, in particular to an assembled steering system for a folding trailer. 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] At present, existing trailers, whether foldable or not, usually use oblique fork universal wheels to facilitate steering. Due to its structural design (the wheel axis and the rotation axis are not on the same vertical line), the oblique fork universal wheel is more convenient and labor-saving in steering than the traditional straight fork universal wheel (the wheel axis and the rotation axis are on the same vertical line). It will rotate according to the direction of force transmission. However, at the same time, due to its free steering, it will be more difficult to control than the straight fork universal wheel, especially on loaded and inclined uphill roads. At this time, the oblique fork universal wheel will rotate in the direction of the sliding force due to the influence of the sliding force. In order to avoid the trailer losing control of the direction, it can only rely on Manpower pulling in the opposite direction brings inconvenience to use, and trailers are usually used outdoors. When the road surface is rough, the free movement characteristics of the oblique fork universal wheel will cause the oblique fork universal wheel to turn on its own when squeezed by the uneven road surface. Although the oblique fork universal wheel can be straightened by increasing the forward force, the oblique fork universal wheel is in an oblique swing state due to the squeezing, and the resistance of the uneven road surface is added. At this time, the force applied needs to be greater than various resistances, which is even more so under heavy load conditions, greatly affecting the user experience of the trailer. In addition, the free steering of the oblique fork universal wheel limits the scalability of the folding trailer and affects the development of the folding trailer.

[0004] Therefore, there is an urgent need to design a folding trailer assembly steering system to overcome one or more of the above-mentioned deficiencies in the prior art. Summary of the Invention

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a steering system of a folding trailer assembly, characterized in that it includes: two wheels, a support seat is provided above each wheel, a support rod assembly is provided between the two support seats, a direction rod assembly is movably connected to the middle part of the support rod assembly, a linkage part is provided between the two wheels, the linkage part is used to control the rotation of the two wheels, the bottom of the direction rod assembly is connected to at least one of the linkage parts, the direction rod assembly drives the linkage part to move, and the linkage part drives the two wheels to rotate, and the support seat is also provided with an assembly part for detachable connection with an external trailer.

[0006] In a preferred embodiment, the support rod assembly includes: a first support rod and a second support rod; one end of the first support rod is rotatably connected to one of the support seats, and one end of the second support rod is rotatably connected to the other support seat, and the first support rod and the second support rod are connected together at one end away from the support seat through a connecting kit, and the first support rod and the second support rod can rotate relative to the connecting kit, and the direction rod assembly is connected to the connecting kit.

[0007] In a preferred embodiment, the ends of the first support rod and the second support rod away from the support seat are respectively fixedly embedded with synchronous teeth, the two synchronous teeth are engaged with each other, and the top surface of the connecting kit is provided with an avoidance position.

[0008] In a preferred embodiment, a shaft sleeve is fixedly provided on one side of the connecting kit, the bottom of the direction rod assembly is passed through the shaft sleeve and is rotatably connected to the shaft sleeve, and the direction rod assembly can rotate horizontally relative to the shaft sleeve.

[0009] In a preferred embodiment, the direction rod assembly includes: a movable head, the movable head is inserted into the shaft sleeve, a transmission rod is fixedly provided at the bottom of the movable head, the end of the transmission rod away from the movable head is rotatably connected to the linkage part, the top of the movable head is rotatably connected to a direction pull rod, and the direction pull rod is telescopically arranged.

[0010] In a preferred embodiment, a reinforcement piece is embedded in one end of the direction pull rod connected to the movable head, and the reinforcement piece is rotatably connected to the movable head.

[0011] In a preferred embodiment, a sleeve is further provided on the outer side of the direction rod, and the outer circle of the sleeve is circular.

[0012] In a preferred embodiment, a wheel swing arm is provided at one end in the same direction of the two wheels respectively, the linkage part is a rigid structural part, the number of the linkage part is one, and the two ends of the linkage part are respectively rotatably connected to the corresponding wheel swing arm.

[0013] In a preferred embodiment, each wheel is provided with a wheel swing arm at both ends, the linkage member is a flexible structural member, the number of the linkage members is two, and each linkage member connects the two wheel swing arms at the same end together.

[0014] In a preferred embodiment, the rotation axis of the steering rod and the rotation axis of the wheel are located on the same straight line.

[0015] In a preferred embodiment, the two wheels are connected to a controller and a power source electrically connected to the controller.

[0016] In a preferred embodiment, one of the support seats is provided with an electric steering device, and an output end of the electric steering device is rotationally connected to the wheel through a connecting member for controlling the rotation of the wheel.

[0017] The beneficial effects of the present invention are as follows: the folding trailer can be divided into two separate kits through an assembled manner and sold separately, which can effectively reduce the replacement cost of the user in the later stage; at the same time, a linkage is provided between the two wheels, and the linkage is driven by the movement of the steering rod assembly to control the steering of the wheel; the structural design is reasonable, the structure is simple, and the operation is convenient; at the same time, through the setting of the linkage, the wheels can directly adopt straight fork universal wheels, making the use of the folding trailer safer and the driving more stable; the precise steering control brings greater scalability to the folding trailer, and has a large market application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is a schematic structural diagram of the wheel of the present invention;

[0020] Figure 3 is a schematic structural diagram of the support rod assembly of the present invention;

[0021] Figure 4 is a cross-sectional view of the support rod assembly of the present invention;

[0022] FIG5 is an exploded view of the steering rod assembly of the present invention;

[0023] FIG6 is a schematic diagram showing the cooperation between the present invention and an external vehicle body.

[0024] In the picture:

[0025] 10. Wheel; 101. Wheel swing arm; 11. Support seat; 12. Support rod assembly; 121. First support rod; 122. Second support rod; 123. Connection kit; 124. Avoidance position; 125. Bushing; 126. Synchronous gear; 13. Steering rod assembly; 131. Movable head; 132. Transmission rod; 133. Steering rod; 134. Reinforcement member; 135. Sleeve; 14. Assembly parts; 15. Linkage parts; 16. Electronic steering device. DETAILED DESCRIPTION

[0026] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many 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.

[0027] 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.

[0028] 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 specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0029] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0030] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of the present invention include a particular feature, structure or characteristic described in conjunction with that embodiment. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" that appear in different places 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 "comprise," "include," "have," and their variations all mean "including but not limited to," unless otherwise specifically emphasized. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] As shown in Figures 1 to 6, the present invention provides an assembled steering system for a folding trailer, characterized in that it includes: two wheels 10, a support seat 11 is provided above each of the wheels 10, a support rod assembly 12 is provided between the two support seats 11, a direction rod assembly 13 is movably connected to the middle of the support rod assembly 12, a linkage 15 is provided between the two wheels 10, the linkage 15 is used to control the rotation of the two wheels 10, the bottom of the direction rod assembly 13 is connected to at least one of the linkage members 15, the direction rod assembly 13 drives the linkage 15 to move, and the linkage 15 drives the two wheels 10 to rotate, and the support seat 11 is further provided with an assembly part 14 for detachable connection to an external trailer;

[0032] The two wheels 10 are connected to each other by a hub motor, and the two wheels 10 can rotate by themselves after being powered. For example, a power wheel of an electric bicycle or a power wheelchair can be used for the specific rotation. A support seat 11 is provided above each wheel 10. The support seat 11 is rotatably connected to the wheel 10, and the wheel 10 can rotate horizontally relative to the support seat 11. A support rod assembly 12 is commonly connected between the two support seats 11. The support rod assembly 12 is rotatably connected to the support seat 11, and the support rod assembly 12 can rotate vertically relative to the support seat 11. When the two wheels 10 approach each other, the support rod assembly 12 rotates upward on the support seat 11, thereby avoiding restricting the approach of the two wheels 10. At the same time, the support rod assembly 12 is also used to support the direction rod assembly 13. The direction rod assembly 13 is movably connected to the middle part of the support rod assembly 12, and the movable mode is to rotate in place. The two wheels 10 are also connected together by a linkage 15. The role of the linkage 15 The folding wheel 10 is controlled by the linkage 15, and the bottom of the steering rod assembly 13 is connected to the linkage 15, and is used to drive the linkage 15 to move when the steering rod assembly 13 rotates. The linkage 15 drives the two wheels 10 to move synchronously under the drive of the steering rod assembly 13, wherein the linkage 15 can be one or more, and the steering rod assembly 13 needs to be connected to at least one linkage 15 so that the linkage 15 can be directly driven by the steering rod assembly 13; an assembly part 14 for connecting to the external vehicle body is also provided on the support seat 11, and the support seat 11 can be detachably connected to the external vehicle body bracket connecting seat through the assembly part 14, and the assembly part 14 can be a quick-release structure or a plug-in column structure. Through assembly, the folding trailer is divided into two independent kit parts. When the user needs to replace it later, the required part can be directly replaced according to demand, which greatly reduces the replacement cost of the user.

[0033] It should be pointed out that since the wheels 10 are connected together by the linkage 15, their rotation is affected by the movement of the linkage 15, that is, the wheel 10 will not rotate when the linkage 15 does not move. Therefore, the drive can be set to a straight-fork universal wheel, which can be more stable than the oblique-fork universal wheel during driving. It cannot rotate freely and will only rotate when subjected to force in a specific direction, which can greatly improve the safety of use. In addition, under heavy load conditions, the steering of the straight-fork universal wheel is simpler, and the precise control method can bring additional functional expansion to the folding trailer, such as automation, manned and other functions.

[0034] Furthermore, the support rod assembly 12 includes: a first support rod 121 and a second support rod 122; one end of the first support rod 121 is rotatably connected to one of the support seats 11, and one end of the second support rod 122 is rotatably connected to the other support seat 11, and the ends of the first support rod 121 and the second support rod 122 away from the support seat 11 are connected together by a connecting kit 123, and the first support rod 121 and the second support rod 122 can rotate relative to the connecting kit 123, and the direction rod assembly 13 is connected to the connecting kit 123;

[0035] Specifically, the first strut 121 and the second strut 122 are rotatably connected to the two support seats 11 respectively, and the first strut 121 and the second strut 122 can rotate up and down relative to the corresponding support seats 11 respectively. At the same time, the first strut 121 and the second strut 122 are connected together at one end away from the support seat 11 through a connecting kit 123, and the first strut 121 and the second strut 122 are rotatably connected to the connecting kit 123 respectively, so that when the wheels 10 approach each other, the first strut 121 and the second strut 122 can rotate under extrusion to achieve the overall folding of the support rod assembly 12, avoiding affecting the approach of the wheels 10, and when the support rod assembly 12 rotates, it will drive the direction rod assembly 13 connected to the connecting kit 123 to rise or fall, and the direction rod assembly 13 drives the linkage 15 to rise or fall.

[0036] Furthermore, the first support rod 121 and the second support rod 122 are respectively fixedly embedded with a synchronous tooth 126 at one end away from the support base 11, and the two synchronous teeth 126 are meshed with each other. The top surface of the connecting kit 123 is provided with a relief;

[0037] Specifically, since the first support rod 121 and the second support rod 122 are connected together by the connecting kit 123, but not directly connected, when the first support rod 121 and the second support rod 122 rotate, the connecting kit 123 will be non-horizontal due to the inconsistent rotation angles, so that the direction rod assembly 13 connected to the connecting kit 123 is tilted, affecting normal use. To this end, a synchronous tooth 126 is fixedly embedded at one end of the first support rod 121 and the second support rod 122, and the two synchronous teeth 126 are in a meshing state. Through the meshing of the two synchronous teeth 126, the first support rod 12 is realized. 1 and the second support rod 122 rotate synchronously, and the angle is also the same, thereby ensuring that the direction rod assembly 13 can always be in a vertical state. At the same time, since the end of the synchronous tooth 126 will contact the top wall of the connecting sleeve 123 after the first support rod 121 and the second support rod 122 are folded, in order to avoid the first support rod 121 and the second support rod 122 being unable to rotate due to the restriction of the connecting sleeve 123, an avoidance position 124 is further opened on the top surface of the connecting sleeve 123. When the first support rod 121 and the second support rod 122 rotate, the end of the synchronous tooth 126 will extend out of the connecting sleeve 123 through the avoidance position 124.

[0038] It should be noted that, in order to facilitate subsequent operations, the first support rod 121 and the second support rod 122 are in a non-horizontal state, so that when the first support rod 121 and the second support rod 122 need to be rotated, there is no need to lift the first support rod 121 and the second support rod 122 first.

[0039] Furthermore, in this embodiment, a shaft sleeve 125 is fixedly provided on one side of the connecting kit 123, and the bottom of the direction rod assembly 13 is passed through the shaft sleeve 125 and is rotatably connected to the shaft sleeve 125, so that the direction rod assembly 13 can rotate horizontally relative to the shaft sleeve 125;

[0040] Specifically, to avoid interfering with the arrangement of the synchronizing teeth 126, an integrally formed sleeve 125 is provided on one outer wall of the connecting sleeve 123. The bottom of the direction rod assembly 13 is inserted into the sleeve 125. The bottom of the direction rod assembly 13 is rotatably connected to the sleeve 125 via a bearing, allowing the direction rod assembly 13 to rotate horizontally relative to the connecting sleeve 123. If the synchronizing teeth 126 are not provided, the direction rod assembly 13 can be directly inserted into the connecting sleeve 123.

[0041] Furthermore, the direction rod assembly 13 includes: a movable head 131, the movable head 131 is inserted into the shaft sleeve 125, a transmission rod 132 is fixedly provided at the bottom of the movable head 131, an end of the transmission rod 132 away from the movable head 131 is rotatably connected to the linkage member 15, and a direction pull rod 133 is rotatably connected to the top of the movable head 131, and the direction pull rod 133 is retractable.

[0042] Specifically, the direction rod assembly 13 includes: a movable head 131, which is inserted into the shaft sleeve 125 and is rotatably connected to the connecting kit 123 through a bearing. The bottom of the movable head 131 is fixedly connected to a transmission rod 132, which extends horizontally outward, and the end of the transmission rod 132 away from the movable head 131 is connected to the linkage 15. The top of the movable head 131 is rotatably connected to the direction pull rod 133, and the direction pull rod 133 can be rotated vertically relative to the movable head 131. The vertical rotation of the direction pull rod 133 can make it easier to improve effort saving during towing, and the direction pull rod 133 can drive the movable head 131 to rotate in place relative to the connecting kit 123, wherein the direction pull rod 133 is a retractable structural design, which is a common structure and will not be described here.

[0043] It should be noted that the direction pull rod 133 can be circular or elliptical. In this embodiment, the elliptical shape is preferably adopted because the pull rods of folding trailers on the market are all elliptical, and the production chain of the product has been formed, which can reduce production costs.

[0044] Furthermore, a reinforcement member 134 is embedded in one end of the direction pull rod 133 connected to the movable head 131, and the reinforcement member 134 is rotatably connected to the movable head 131;

[0045] Specifically, in this embodiment, the direction pull rod 133 adopts an elliptical shape, and the bottom of the direction pull rod 133 is rotatably connected to the movable head 131. In order to improve the strength of the direction pull rod 133 during use, a reinforcement 134 is embedded in the bottom of the direction pull rod 133. The reinforcement 134 is rotatably connected to the movable head 131. The direction pull rod 133 is rotatably connected to the movable head 131 through the reinforcement 134, thereby improving the strength of the connection and improving the service life.

[0046] Furthermore, a sleeve 135 is provided on the outer side of the direction pull rod 133, and the outer circle of the sleeve 135 is circular;

[0047] Specifically, one end of the existing folding body is usually provided with a clamp for limiting the direction rod 133. In this embodiment, in order to facilitate not towing, the direction rod 133 can be fixed on the folding body and can be rotated on the folding body to control the direction of the wheel 10. A sleeve 135 is also provided on the outside of the direction rod 133. The outer circle of the sleeve 135 is circular. When the direction rod 133 rotates in the clamp, the sleeve 135 rotates accordingly. Since the sleeve 135 is round, it will be restricted by the clamp no matter how much it rotates, which can effectively prevent the direction rod 133 from disengaging from the clamp during rotation. The length of the sleeve 135 is determined by the rising height of the direction rod 133 relative to the folding body when the folding body is folded.

[0048] It should be noted that if the direction rod 133 is circular, the sleeve 135 is not required.

[0049] Furthermore, in one embodiment, one end of the two wheels 10 in the same direction is respectively provided with a wheel swing arm 101, the linkage member 15 is a rigid structural member, the number of the linkage member 15 is one, and both ends of the linkage member 15 are respectively rotatably connected to the corresponding wheel swing arm 101;

[0050] Specifically, the linkage part 15 has two structures, which all change according to the number of the linkage parts 15. One of them is that the number of the linkage parts 15 is one, and the linkage part 15 is a hard structural part, such as aluminum alloy, iron, steel or plastic, which is not easy to deform. When a hard structural part is used, the linkage part 15 has multiple parts and is connected end to end, so that it can be folded according to needs and converted between the "I" shape and the "F" shape. At the same time, wheel swing arms 101 are respectively provided on the same end of the two wheels 10, and the two ends of the linkage part 15 are respectively connected to the two wheel swing arms 101 for rotation, and the transmission rod 132 is connected to the linkage part 15 located in the middle for rotation. When the transmission rod 132 swings left and right, it pushes the linkage part 15 to move left and right. Due to the hardness of the linkage part 15, it will push the wheel swing arm 101 to swing left and right when it moves left and right, thereby driving the wheels 10 to rotate left and right, realizing synchronous steering of the two wheels 10.

[0051] Furthermore, in another embodiment, each wheel 10 is provided with a wheel swing arm 101 at both ends, and the linkage member 15 is a flexible structural member. There are two linkage members 15, and each linkage member 15 connects the two wheel swing arms 101 at the same end.

[0052] Specifically, another way of the linkage 15 is that the number of the linkage 15 is set to two, and the linkage 15 is a flexible structural member, such as a material that is easily deformed, such as a steel wire, a steel wire rope or a braided rope. In this way, each wheel 10 is provided with a wheel swing arm 101 at both ends, and the two linkages 15 are respectively located at the two ends of the two wheels 10 and are respectively connected to the corresponding wheel swing arms 101, and the transmission rod 132 needs to be connected to at least one of the linkages 15. When the transmission rod 132 swings left and right, it drives the linkage 15 connected thereto to move. Since the linkage 15 is a flexible structural member, It is flexible, that is, it cannot generate thrust, and can only drive one of the wheels 10 to rotate through the pulling force generated by the movement of the transmission rod 132. At this time, since the two wheels 10 are connected together by another linkage 15, when one of the wheels 10 rotates, it will drive the other wheel 10 to rotate through the other linkage 15, thereby realizing the synchronous movement of the two wheels 10, and since the linkage 15 is flexible, each linkage 15 can be integrally formed, which can deform by itself when the external force is lost to avoid restricting the two wheels 10 from approaching.

[0053] Furthermore, in the above two methods, the rotation axis of the steering rod 133 and the rotation axis of the wheel 10 are located on the same straight line;

[0054] Specifically, since the movement of the transmission rod 132 is in an arc shape left and right, and the two implementation methods of the linkage member 15 are both in a linear motion, in order to ensure that there is no movement conflict between the transmission rod 132 and the linkage member 15, the rotation axis of the direction pull rod 133 and the rotation axis of the wheel 10 at the same end need to be in the same straight line. Under this condition, since the transmission rod 132 and the wheel swing arm 101 are of the same length, there will be no movement conflict at this time. Otherwise, it is necessary to open a slide groove on the transmission rod 132 so that the linkage member 15 can change its relative position with the transmission rod 132.

[0055] It should be pointed out that if the linkage 15 is a flexible structure and the two ends of the transmission rod 132 are respectively connected to the corresponding linkage 15, the three do not need to be in the same straight line, and there is no need to provide a slide groove, but it is necessary to meet the requirement of forming a parallelogram between the wheel swing arm 101 and the transmission rod 132 of the two wheels 10.

[0056] Furthermore, in this embodiment, the two wheels 10 are connected to a controller and a power source electrically connected to the controller;

[0057] Specifically, in order to make the use of the folding trailer more labor-saving, the hand-pulled trailer can be set as an electric power-assisted trailer. It is only necessary to connect the wheel 10 to the controller and the power supply, and the power supply is electrically connected to the controller so that the wheel 10 is driven by the controller; at the same time, a control button for controlling the speed and start and stop (not shown in the figure) can be set on the direction rod 133, and the control button is also electrically connected to the controller, so that electric power assistance can be achieved.

[0058] It should be pointed out that the circuit control adopts existing conventional technology, and reference may be made to the control of electric bicycles, so it will not be described in detail here.

[0059] Furthermore, one of the support seats 11 is provided with an electric steering device 16, and an output end of the electric steering device 16 is rotatably connected to the wheel 10 through a connecting member for controlling the rotation of the wheel 10;

[0060] Specifically, in order to realize the remote control function, an electronic steering device 16 can also be installed on one of the support seats 11. The output end of the electronic steering device 16 can make left and right swinging movements. The output end of the electronic steering device 16 is rotationally connected to the wheel swing arm 101 of one of the power wheels, and the electronic steering device 16 is also electrically connected to the controller. The controller can receive external control signals to control the operation of the electronic steering device 16 to achieve the remote control effect.

[0061] It should be noted that the electronically controlled steering device 16 may also be directly connected to the linkage 15 to control the steering of the wheel 10 .

[0062] In summary, the utility model uses an assembled manner to enable the folding trailer to be divided into two separate kits, which are sold separately, and can effectively reduce the replacement cost of users in the later stage. At the same time, a linkage 15 is provided between the two wheels 10, and the linkage 15 is driven by the movement of the steering rod assembly 13, thereby controlling the steering of the wheel 10. The structural design is reasonable, simple, and easy to operate. At the same time, through the provision of the linkage 15, the wheel 10 can directly adopt a straight fork universal wheel, making the use of the folding trailer safer and the driving more stable. The precise steering control brings greater scalability to the folding trailer and has a large market application prospect.

[0063] The present invention is not limited to what is described in the specification and implementation modes, and therefore additional advantages and modifications can be easily realized by those skilled in the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrated examples shown and described herein.

Claims

1. A folding trailer assembly steering system, characterized in that: include: Two wheels, each of which is provided with a support seat above, a support rod assembly is provided between the two support seats, a direction rod assembly is movably connected to the middle of the support rod assembly, a linkage part is provided between the two wheels, the linkage part is used to control the rotation of the two wheels, the bottom of the direction rod assembly is connected to at least one of the linkage parts, the direction rod assembly drives the linkage part to move, and the linkage part drives the two wheels to rotate, and the support seat is also provided with an assembly part for detachable connection with an external trailer.

2. The folding trailer assembly steering system according to claim 1, characterized in that: The support rod assembly includes: a first support rod and a second support rod; one end of the first support rod is rotatably connected to one of the support seats, one end of the second support rod is rotatably connected to the other support seat, the first support rod and the second support rod are connected together at one end away from the support seat through a connecting kit, and the first support rod and the second support rod can rotate relative to the connecting kit, and the direction rod assembly is connected to the connecting kit.

3. The folding trailer assembly steering system according to claim 2, characterized in that: The first support rod and the second support rod are respectively fixedly embedded with synchronous teeth at one end away from the support seat, and the two synchronous teeth are meshed with each other. The top surface of the connecting kit is provided with an avoidance position.

4. The folding trailer assembly steering system according to claim 2, characterized in that: A shaft sleeve is fixedly provided on one side of the connecting kit, the bottom of the direction rod assembly is passed through the shaft sleeve and is rotatably connected to the shaft sleeve, and the direction rod assembly can rotate horizontally relative to the shaft sleeve.

5. The folding trailer-mounted steering system according to claim 4, characterized in that: The direction rod assembly includes: a movable head, the movable head is inserted into the shaft sleeve, a transmission rod is fixedly provided at the bottom of the movable head, one end of the transmission rod away from the movable head is rotatably connected to the linkage member, and the top of the movable head is rotatably connected to a direction pull rod, and the direction pull rod is telescopically arranged.

6. The folding trailer-mounted steering system according to claim 5, characterized in that: A reinforcing piece is embedded in one end of the direction pull rod connected to the movable head, and the reinforcing piece is rotatably connected to the movable head.

7. The folding trailer-mounted steering system according to claim 5, characterized in that: A sleeve is also provided on the outer side of the direction pull rod, and the outer circle of the sleeve is circular.

8. The folding trailer-mounted steering system according to claim 5, characterized in that: One end of the two wheels in the same direction is respectively provided with a wheel swing arm, the linkage member is a rigid structural member, the number of the linkage member is one, and the two ends of the linkage member are respectively rotatably connected to the corresponding wheel swing arm.

9. The folding trailer-mounted steering system according to claim 5, characterized in that: Wheel swing arms are respectively provided at both ends of each wheel, and the linkage member is a flexible structural member. There are two linkage members, and each linkage member connects two wheel swing arms at the same end.

10. The folding trailer-mounted steering system according to claim 8 or 9, characterized in that: The rotation axis of the steering rod and the rotation axis of the wheel are located on the same straight line.

11. The folding trailer-mounted steering system according to claim 1, characterized in that: The two wheels are connected with a controller and a power source electrically connected to the controller.

12. The folding trailer-mounted steering system according to claim 11, characterized in that: One of the support seats is provided with an electric steering device, and the output end of the electric steering device is rotationally connected to the wheel through a connecting piece for controlling the rotation of the wheel.

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