CN116461639A - A multi-purpose folding trailer handle and folding trailer - Google Patents

Abstract

The application relates to a multi-purpose folding trailer handle, comprising: a steering rod assembly, at least one steering wheel is connected to the bottom end of the steering rod assembly, the steering wheel rotates with the steering rod assembly, the bottom of the steering rod assembly is above the steering wheel and a bushing is provided, the bushing is used to rotate the steering rod assembly, one side of the bushing is connected to a limiter, and the two ends of the limiter are respectively connected to a support rod. With the above design, the shaft sleeve and the limiter are set to be rotationally connected, so that the handle of the multi-purpose folding trailer has various forms, which can be converted according to the usage conditions, and the practicality is improved. The handle of the multi-purpose folding trailer has a control function, and can be adapted to a folding car body with electric drive or an ordinary folding car body.

Description

A multi-purpose folding trailer handle and folding trailer

technical field

The invention relates to the technical field of folding trailers, in particular to a multipurpose folding trailer handle and a folding trailer.

Background technique

Folding trailer, a foldable and towable cargo vehicle, is widely used in moving things because of its simple use, loadability, convenient storage, time-saving and labor-saving, and is often used in outdoor activities or short-distance transportation.

Existing folding trailer such as patent No. CN202122285319.1 (a new type of camping vehicle) can be known according to its specification and accompanying drawings, and it discloses a foldable vehicle body and a handle that is positioned at the front end of the vehicle body and can rotate relative to the folding vehicle body. It is impossible to carry people or only children, and it can only be dragged by manpower. Because it has loads and has a certain weight, manpower still needs to walk during the dragging process. If it is used for a long time, it is easy to bring fatigue to the user, and the user experience is not good. Based on this situation, a power-assisted trailer is also designed in the prior art, such as Patent No. CN202220922980. , to reduce the fatigue of the user under long-term use, but these two solutions have a common problem that their trailer handles have a single function and only have the effect of facilitating towing, and are limited by the structure of the trailer handle.

Therefore, there is an urgent need to design a multi-purpose folding trailer handle and folding trailer to overcome the above-mentioned one or more deficiencies in the prior art.

Contents of the invention

The technical solution adopted by the present invention to achieve the above-mentioned technical purpose is: a multi-purpose folding trailer handle, which is characterized in that it includes: a steering rod assembly, at least one steering wheel is connected to the bottom end of the steering rod assembly, and the steering wheel rotates with the steering rod assembly. The bottom of the steering rod assembly is provided with a bushing above the steering wheel. The bushing is used to rotate the steering rod assembly.

In a preferred embodiment, the direction rod assembly includes: a sleeve rod and a direction rod. The direction rod is telescopically arranged in the sleeve rod, and a clamping device is provided between the direction rod and the sleeve rod to limit the axial movement and radial rotation of the direction rod. The top end of the direction rod is also connected with a handle ring, and the handle ring drives the rotation of the sleeve rod through the direction rod.

In a preferred embodiment, the engaging device includes: a telescopic bayonet provided on the top of the sleeve rod, and a telescopic bayonet provided on the side wall of the direction rod to cooperate with the telescopic bayonet.

In a preferred embodiment, the bottom of the handle ring is provided with a mounting hole, the top end of the direction rod is inserted into the mounting hole at the bottom of the handle ring, the side wall of the top end of the direction rod is provided with a limited-rotation detent, and the side wall of the mounting hole at the bottom of the handle ring is provided with a number of delimiting holes that match the delimiting detent.

In a preferred embodiment, the handle ring is in the shape of an inverted trapezoid, folding grooves are respectively provided on both sides of the handle ring, and the same end of the two folding grooves is rotatably connected to a handle, and the end of the handle rod connected to the folding groove is also provided with a limiting device, which is used to limit the position when the handle is stored in the folding groove or when the handle is horizontal relative to the handle ring.

In a preferred embodiment, the handle ring is further provided with several control buttons, and several of the control buttons are connected with integrated wires.

In a preferred embodiment, the bushing is movably connected to the bushing rod, and the bushing rod is displaced and/or rotated relative to the bushing. The bottom of the bushing rod is located within the range of the bushing and is provided with an arc-shaped pin hole at a predetermined angle, and the position of the bushing corresponding to the arc-shaped pin hole is provided with a retractable bayonet pin.

In a preferred embodiment, the sleeve rod is further provided with a number of folding adjustment holes, the folding adjustment holes are adapted to the folding bayonet, and the sleeve rod is also provided with a rotation-limiting chute corresponding to and adapted to the folding bayonet.

In a preferred embodiment, the inner wall of the sleeve rod is provided with a protruding rotation-limiting projection, and the outer wall of the direction rod is provided with a rotation-limiting groove adapted to the rotation-limiting projection.

In a preferred embodiment, the bushing is rotatably connected to the limiting member, and one side of the bushing is provided with an extended connecting plug, and the middle part of the top surface of the connecting plug is provided with a plug slide slot, and the side wall of the connecting plug far away from the shaft sleeve is provided with a plug rotating shaft hole, and the side wall of the connecting plug is also provided with a waist-shaped sliding hole spaced from the plug rotating shaft hole, and a control rotating shaft hole is provided below the waist-shaped sliding hole.

In a preferred embodiment, a casing is provided on the side of the limiting member away from the support rod, the end surface and the bottom surface of the casing are open, and an avoidance groove is opened in the middle of the top surface of the casing, and an insert rotating shaft is connected to the casing, the insert rotating shaft is rotatably connected to the insert rotating shaft hole, and the sleeve rotates relative to the limiting member through the insert rotating shaft.

In a preferred embodiment, the sleeve is also rotatably connected with a retractable control handle, the retractable control handle includes: a handle and a rod; the rod is fixedly connected to the handle, the end of the rod far away from the handle is provided with a control shaft, the control shaft is adapted to and rotatably connected to the control shaft hole, the end of the rod provided with the control shaft is also provided with a shaft sliding hole, and a first detent is movable in the sliding hole of the shaft, and the rod is located in the insertion block chute and the escape groove. The two ends of the bayonet pin are respectively located in the waist-shaped sliding hole, and when the handle rotates around the control shaft, the first bayonet pin is driven to move in the shaft sliding hole and the waist-shaped sliding hole.

In a preferred embodiment, first U-shaped holes are formed on both sides of the end surface of the casing opening, and second U-shaped holes are respectively formed on both sides of the bottom surface of the casing opening. When the bushing rotates relative to the limiting member, the first detent is snapped into the corresponding first U-shaped hole or the second U-shaped hole, and the first U-shaped hole and the second U-shaped hole are separated by a preset angle.

In a preferred embodiment, a first tension spring is fixedly connected to the bottom surface of the connecting plug, and an end of the first tension spring far away from the connecting plug is fixedly connected to an end of the rod part provided with the control shaft.

In a preferred embodiment, the same ends of the two support rods are respectively rotatably connected to the limiter, and the ends of each of the support rods away from the limiter are respectively rotatably connected to a connection kit, and the opposite sides of the two connection kits are inclined at a predetermined angle in the opposite direction, so that the ends of the two support rods far away from the connection kit rotate horizontally around the connection kit to form a triangular structure.

In a preferred embodiment, a connecting shaft is provided at the end of the connecting kit far away from the support rod, and the two ends of the connecting shaft pass through both sides of the connecting kit respectively, and a displacement sliding hole is opened in the middle of the connecting kit, and a second bayonet is arranged in the displacement sliding hole, and two second extension springs are connected between the second bayonet and the connecting shaft.

In a preferred embodiment, the first bayonet is connected with two linkage lines, and the ends of the two linkage lines away from the first bayonet are respectively connected to the two second bayonets, so that when the first bayonet is displaced by the folding control handle, the second bayonet is linked with the first bayonet through the linkage line.

The second embodiment of the present invention provides a foldable trailer, which includes a foldable body and the multi-purpose foldable trailer handle as described in any one of the above-mentioned embodiments; the foldable body can be folded and contracted, and power wheels are respectively installed on both sides of the rear end of the foldable body, and the power wheels are used to drive the foldable body to move forward after being energized. The two sides of the front end of the folding car body are respectively provided with load-bearing bases, and the support rods of the handle of the multi-purpose folding trailer are connected to the load-bearing bases.

Preferably, the height of the auxiliary wheels is smaller than that of the power wheels and the steering wheels.

Preferably, one end of the load-bearing base is provided with a retractable seat with an open end surface and a top surface, the connecting shaft of the connecting kit is rotatably connected with the retractable seat, and a third U-shaped hole is respectively opened on both sides of the top surface of the retractable seat, and the third U-shaped hole is used to cooperate with the second bayonet to limit the position, and the two sides of the end surface of the retractable seat are respectively provided with C-shaped holes, and the C-shaped hole is used to cooperate with the second bayonet to limit the position, and the length of the C-shaped hole is greater than the width of the second bayonet.

Preferably, a folding seat is detachably installed above the front end of the folding vehicle body, and a seat support is provided at the bottom of the folding seat, and the seat support is connected with the folding vehicle body.

The beneficial effect of the present invention is that: the shaft sleeve and the limiting member are arranged to be rotationally connected, so that the handle of the multi-purpose folding trailer has various forms, which can be converted according to the usage conditions, and the practicability is improved, and the handle of the multi-purpose folding trailer has a control function, and can be adapted to a folding car body with electric drive or an ordinary folding car body without limitation, and the applicability is improved, so that the folding car body has the functions of electric driving with people and objects, electric power-assisted towing, and folding and storage, and has the characteristics of lightness, portability and convenient movement, so as to meet the use requirements of various scenarios.

Description of drawings

Fig. 1 is the structural representation of multi-purpose folding trailer handle of the present invention;

Fig. 2 is an exploded view of the multi-purpose folding trailer handle of the present invention;

Fig. 3 is a structural schematic diagram of the handle ring of the present invention;

Fig. 4 is the structural representation of direction bar of the present invention;

Fig. 5 is the structural representation of sleeve rod of the present invention;

Fig. 6 is the structural representation of axle sleeve of the present invention;

Fig. 7 is a schematic structural view of the folding control handle of the present invention;

Fig. 8 is a structural schematic diagram of a limiting member of the present invention;

Fig. 9 is an exploded view of the connection kit of the present invention;

Fig. 10 is a schematic diagram of the structure of the folding car body according to the second embodiment of the present invention;

Fig. 11 is a combined schematic diagram of the first embodiment and the second embodiment of the present invention;

Fig. 12 is a schematic diagram of dragging under the combined state of the first embodiment and the second embodiment of the present invention;

Fig. 13 is a schematic diagram of folding in the combined state of the first embodiment and the second embodiment of the present invention;

Figure 14 is a schematic diagram of the auxiliary wheel of the present invention from the ground;

Fig. 15 is a block diagram of the electrical connection of the present invention;

Fig. 16 is a schematic structural view of the electric wheel of the present invention;

Fig. 17 is a functional block diagram of the controller of the present invention.

In the picture:

10. Direction rod assembly; 101. Direction rod; 1011. Telescopic clamping hole; 1012. Limiting rotation bayonet; 1013. Limiting rotation groove;

102. handle ring; 1021. rotation limit hole; 1022. folding groove; 1023. grip rod; 1024. limit device; 1025. control button; 1026. integrated wire; 1027. display screen;

103, sleeve rod; 103-A, clamping device; 1031, telescopic bayonet pin; 1032, arc-shaped pin hole; 1033, folding adjustment hole; 1034, limit-rotation chute; 1035, limit-rotation bump; 1036, direction wheel;

11, shaft sleeve; 111, folding pin; 112, connecting plug; 113, plug chute; 114, plug shaft hole; 115, waist-shaped sliding hole; 116, control shaft hole; 117, first extension spring;

12. Folding control handle; 121. Handle; 122. Rod; 123. Control shaft; 124. Sliding hole of shaft; 125. First bayonet pin;

13. Limiting piece; 131. Cover shell; 132. Avoidance groove; 133. Plug shaft; 134. First U-shaped hole; 135. Second U-shaped hole;

14. Support rod; 141. Connecting kit; 142. Connecting shaft; 143. Displacement slide hole; 144. Second detent; 145. Second extension spring; 146. Foot brake;

15. Folding vehicle body; 151. Controller; 152. Power supply; 153. Power wheel; 154. Training wheel; 155. Load-bearing base; 156. Folding seat; 157. Third U-shaped hole; 158. C-shaped hole;

16. Folding seat; 161. Seat support.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many ways other than those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise 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 intermediary. In addition, "connected" can be directly connected or indirectly connected through an intermediary. Wherein, "fixed" 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 invention, such as "inner", "outer", "top", "bottom", etc., are only referring to the directions of the drawings. Therefore, the orientation terms used are for better and more clearly explaining and understanding the embodiments of the present invention, rather than indicating or implying that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the embodiments of the present invention.

In the embodiments of the present invention, the terms "first" and "second" are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.

In the embodiment of the present invention, "and/or" is just a relationship describing the relationship between related objects, indicating that there may be three relationships, for example, A and/or B, which may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Reference to "one embodiment" or "some embodiments" or the like in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this specification do not necessarily all refer to the same embodiment, but mean "one or more, but not all," unless specifically emphasized otherwise. The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically stated otherwise. Accordingly, the present invention is not limited to the specific examples disclosed below.

As shown in Figures 1-9, the first embodiment of the present invention provides a multi-purpose folding trailer handle, including: a steering rod assembly 10, at least one steering wheel 1036 is connected to the bottom end of the steering rod assembly 10, and the steering wheel 1036 rotates with the steering rod assembly 10. The bottom of the steering rod assembly 10 is located above the steering wheel 1036. A bushing 11 is provided. The bushing 11 is used to rotate the steering rod assembly 10. At least one support rod 14 is connected to the member 13;

Specifically, when the handle of the multi-purpose folding trailer is combined with an external trailer, the steering rod assembly 10 is used to control the direction of travel of the external trailer. At least one steering wheel 1036 is connected to the bottom of the steering rod assembly 10. The number of the steering wheels 1036 can be increased according to the use requirements. If the overall stability of the folding trailer needs to be improved, two steering wheels 1036 can be set. The two steering wheels 1036 are spaced at a predetermined distance. The bottom of the steering rod assembly 10 is also provided with a shaft sleeve 11, which is used to make the steering rod assembly 10 rotate in place relative to the shaft sleeve 11, and then drive the steering wheel 1036 to rotate. A limit piece 13 is connected to one side of the shaft sleeve 11. The limit piece 13 is used to connect the support rod 14 and the direction rod assembly 10. Two support rods 14 are provided. There are two types, one is movable connection and the other is fixed connection. The first embodiment of the present application is preferably movable connection, through which the multi-purpose folding trailer handle of the present application can change the use posture according to requirements to meet different use requirements.

Further, in this embodiment, the direction rod assembly 10 includes: a sleeve rod 103 and a direction rod 101 , the direction rod 101 is telescopically arranged in the sleeve rod 103 , and a locking device is provided between the direction rod 101 and the sleeve rod 103 to limit the axial movement of the direction rod 101 , and a handle ring 102 is connected to the top of the direction rod 101 , and the handle ring 102 drives the sleeve rod 103 to rotate through the direction rod 101 ;

Concretely, the direction rod 101 can telescopically slide in the sleeve rod 103 to adjust the use height of the direction rod 101. At the same time, between the sleeve rod 103 and the direction rod 101, a clamping device that restricts the direction rod 101 to move axially and radially relative to the sleeve rod 103 is provided, so that the direction rod 101 can drive the sleeve rod 103 to rotate horizontally. At the same time, a handle ring 102 is connected to the top of the direction rod 101. The handle ring 102 is hollow, so that the user can put his hand into the handle ring 102 when he needs to tow, so as to improve the convenience of towing, and the handle ring 102 can drive the direction rod 101 and the sleeve rod 103 to rotate relative to the shaft sleeve 11, so as to control the orientation of the direction wheel 1036.

Further, as shown in FIG. 4 and FIG. 5 , the locking device includes: a telescopic locking pin 1031 arranged on the top of the sleeve rod 103 , and a telescopic locking hole 1011 arranged on the side wall of the direction bar 101 to cooperate with the telescopic locking pin 1031 ;

Specifically, in order to prevent the direction rod 101 from freely moving in the sleeve rod 103, a clamping device is provided between the sleeve and the direction rod. The clamping device includes: a telescopic bayonet pin 1031 arranged on the top of the sleeve rod 103, and a plurality of telescopic bayonet holes 1011 provided along the length direction on the side wall of the direction rod 101. The multiple telescopic bayonet holes 1011 are arranged at intervals and on the same straight line. The position relative to the sleeve rod 103 is fixed, wherein the interior of the telescopic bayonet 1031 has its own spring, and the head of the telescopic bayonet 1031 is pushed out into the telescopic bayonet hole 1011 under the force of the spring to realize the limit.

Further, in this embodiment, as shown in Figure 2, Figure 3 and Figure 4, the bottom of the handle ring 102 is provided with a mounting hole, the top of the direction rod 101 is inserted into the mounting hole at the bottom of the handle ring 102, the top of the direction rod 101 is inserted into the bottom of the handle ring 102 and connected in rotation, the top side wall of the direction rod 101 is provided with a rotation-limiting bayonet pin 1012, and the side wall of the installation hole at the bottom of the handle ring 102 is provided with a number of rotation-limiting holes that match the rotation-limiting bayonet pins 1021;

Specifically, in order to facilitate different use requirements, if the steering wheel 1036 needs to rotate but the handle ring 102 does not turn, the handle ring 102 can change the angle relative to the direction rod 101, and a mounting hole (not shown in the figure) is provided in the middle of the bottom surface of the handle ring 102. At the same time, the handle ring 102 can rotate freely relative to the direction rod 101. Because the handle ring 102 can rotate freely relative to the direction rod 101, the handle ring 102 cannot drive the direction rod 101 to rotate. The rotation of the direction rod 101 is realized through the cooperation of the rotation-limiting bayonet 1012 and the rotation-limiting hole 1021. Since the rotation-limiting bay 1021 is provided with a plurality of holes along the bottom circumference of the handle ring 102, it can be fixed within a preset angle to meet different usage requirements. The structure of the rotation-limiting bayonet 1012 is the same as that of the telescopic bayonet 1031.

Further, in this embodiment, as shown in FIG. 3 , the handle ring 102 is in the shape of an inverted trapezoid, and the two sides of the handle ring 102 are respectively provided with folding grooves 1022, and the same end of the two folding grooves 1022 is rotatably connected with a grip rod 1023, and the end of the grip rod 1023 connected to the folding groove 1022 is also provided with a limiting device 1024, which is used to orient the grip when the grip rod 1023 is stored in the folding groove 1022. When the rod 1023 is horizontal relative to the handle ring 102, the position is limited;

Specifically, the shape of the handle ring 102 also includes but is not limited to triangle, rectangle, ellipse, circle or other polygons, etc. In this application, in order to make the rationality of the structure preferably an inverted trapezoid, a folding groove 1022 is respectively opened on both sides of the handle ring 102. One end of the folding groove 1022 is rotatably connected with a handle 1023 through a rotating shaft. The handle 1023 can be rotated and stored in the folding groove 1022 when not in use. 023 can be used normally when in use, and a limit device 1024 is also provided on the end that the folding groove 1022 is connected with the handle bar 1023. In this application, the limit device 1024 is preferably a bayonet pin with a spring inside, which is simple in structure, easy to install, and low in cost. The position corresponding to the positioning device 1024 is provided with a hole adapted to the positioning device 1024, so that the handle 1023 can be fixed by the positioning device 1024 in the unfolded state or in the collapsed state to ensure normal use. A display screen 1027 is also provided on the side of the handle ring 102 facing the direction of the support rod 14. The display screen 1027 is used to display relevant information such as power and speed after the handle of a multi-purpose folding trailer is electrically connected with an external trailer.

Further, as shown in FIG. 3 , the handle ring 102 is also provided with several control buttons 1025, and several of the control buttons 1025 are connected with integrated wires 1026;

Specifically, in order to facilitate the adaptation of the handlebar 102 to an external electric-driven trailer, a number of control buttons 1025 are provided on the handlebar 102. The control buttons 1025 include but are not limited to a forward/reverse button, a driving/towing switch button, a trailer assist speed control button, a car light switch button, a horn button, and a turn signal control button. The principle of finger dial speed control: it includes a finger handle and a finger position sensor. When the finger handle is moved, the finger position sensor will transmit the finger position signal to the controller, and the controller then adjusts the output power of the motor by controlling the battery output voltage or current, thereby controlling the speed. The thumb position sensor can be realized by means of variable resistance or hall sensor, which converts the rotation range of the thumb into an electrical signal and sends it to the controller.

The rotating speed control principle of the grip bar 1023 is the same as the dial speed control principle. This is a common prior art, so its structure will not be described in detail here, and reference can be made to the electric door handle of an electric bicycle. An integrated wire 1026 is provided in the steering rod 101. The integrated wire 1026 enters the sleeve rod 103 from the steering rod 101 and then leads out from the support rod 14 to avoid wire exposure. When the corresponding button is pressed, the corresponding resistance value will be generated, which will be transmitted to the controller through the integrated wire, and the controller will receive the resistance signal, identify the function of the button according to the resistance value and make corresponding control.

Further, in this embodiment, as shown in FIG. 1 , FIG. 5 , and FIG. 6 , the sleeve 11 is movably connected with the sleeve rod 103 , and the sleeve rod 103 is displaced and/or rotated relative to the sleeve 11 . The bottom of the sleeve rod 103 is located within the range of the sleeve 11 and is provided with an arc-shaped pin hole 1032 at a predetermined angle, and the position corresponding to the shaft sleeve 11 and the arc-shaped pin hole 1032 is provided with a retractable bayonet pin 111 ;

Specifically, the shaft sleeve 11 and the sleeve rod 103 are movably connected, and the movable mode is that the sleeve rod 103 can move axially relative to the shaft sleeve 11, and the sleeve rod 103 can rotate horizontally relative to the shaft sleeve 11. 120°-150° arc-shaped pin hole 1032, the arc-shaped pin hole 1032 is located within the set range of the shaft sleeve 11, and at the same time, a folding bayonet 111 is provided at the position corresponding to the shaft sleeve 11 and the arc-shaped pin hole 1032. 11 can also limit the axial movement of the sleeve rod 103 relative to the sleeve 11 .

It should be noted that, in order to limit the sliding of the axle sleeve 11 to the direction of the direction wheel 1036, a plane bearing (not shown) is embedded in the bottom surface of the axle sleeve 11. In order to make the plane bearing spaced from the wheel yoke of the direction wheel, a boss can be arranged at the bottom of the sleeve rod 103. The diameter of the boss is smaller than the plane bearing. By setting the boss, the plane bearing is separated from the wheel yoke of the direction wheel. Insert it into the sleeve rod 103 and connect with the wheel fork shaft of the steering wheel 1036, so that the steering wheel 1036 is detachably fixed on the sleeve rod 103 and rotates with the sleeve rod 103. When the limit screw needs to be taken out, the relative position of the shaft sleeve 11 and the sleeve rod 103 can be changed so that the limit screw is exposed, and the limit screw can be removed to take out the direction wheel 1036.

Further, as shown in Figure 5, the sleeve rod 103 is also provided with a number of folding adjustment holes 1033, the folding adjustment holes 1033 are adapted to the folding bayonet pin 111, and the sleeve rod 103 is also provided with a rotation limiting chute 1034 corresponding to and adapted to the folding bayonet pin 111;

Specifically, because the sleeve rod 103 can move axially relative to the shaft sleeve 11, in order to prevent it from being fixed and affecting normal use, a plurality of folding adjustment holes 1033 are also provided on the sleeve rod 103, and the folding adjustment holes 1033 are compatible with the folding bayonet pin 111. When the sleeve 11 rotates, the sleeve rod 103 will drive the folding adjustment hole 1033 to rotate horizontally, but the folding bayonet pin 111 will not rotate horizontally. 1, so that when the sleeve rod 103 moves, the folding bayonet pin 111 can be positioned in the rotation-limiting chute 1034, so that the sleeve rod 103 cannot rotate relative to the shaft sleeve 11 when moving, and because the rotation-limiting slide groove 1034 is arranged along the length of the sleeve rod 103, even if the folding bayonet 111 breaks away from the cooperation with the rotation-limiting chute 1034, it can be easily and quickly refitted together, only need to rotate the sleeve rod 103.

Further, in this embodiment, as shown in FIG. 5 , the inner wall of the sleeve rod 103 is provided with a protruding rotation-limiting protrusion 1035 , and the outer wall of the direction rod 101 is provided with a rotation-limiting groove 1013 adapted to the rotation-limiting protrusion 1035 ;

Specifically, in order to further improve the degree of cooperation between the direction rod 101 and the sleeve rod 103, a rotation-limiting projection 1035 of predetermined length is provided on the inner wall of the top end of the sleeve rod 103, and a rotation-limiting groove 1013 arranged along the length of the direction rod 101 is provided on the outer wall of the direction. The rotation-limiting groove 1013 is adapted to the rotation-limiting projection 1035. The cooperation of the rotation-limiting hole 1021 ensures the synchronization between the direction rod 101 and the sleeve rod 103. At the same time, the setting of the rotation-limiting protrusion 1035 and the rotation-limiting groove 1013 can also prevent the rotation of the direction rod 101 relative to the sleeve rod 103 after the telescopic bayonet 1031 loses cooperation with the rotation-limiting hole 1021.

Further, in this embodiment, as shown in FIG. 1 and FIG. 6 , the bushing 11 is rotationally connected with the stopper 13, and one side of the bushing 11 is also provided with a connecting plug 112 extending out. The middle part of the top surface of the connecting plug 112 is provided with a plug sliding groove 113, and the side wall of the connecting plug 112 far away from the end of the bushing 11 is provided with a plug rotating shaft hole 114, and the side wall of the connecting plug 112 is also provided with a plug rotating shaft hole. 114 waist-shaped sliding holes 115 arranged at intervals, the bottom of the waist-shaped sliding holes 115 is provided with a control shaft hole 116;

Specifically, one side of the shaft sleeve 11 is provided with a connecting plug 112, which is integrally formed with the shaft sleeve 11, and in the middle of the top surface of the connecting plug 112 is also provided with a plug chute 113 arranged along the length direction of the connecting plug 112. On the side wall of the connecting plug 112 away from the end of the shaft sleeve 11, there is a plug shaft hole 114 arranged along the width direction of the connecting plug 112. The plug shaft hole 114 runs through both sides of the connecting plug 112. A waist-shaped sliding hole 115 is also provided between the inserting block rotating shaft hole 114 and the shaft sleeve 11, and a control rotating shaft hole 116 is provided below the waist-shaped sliding hole 115; a casing 131 with an end surface and an opening on the bottom surface is provided on the side of the limiter 13 away from the support rod 14, and the connecting plug 112 can be inserted into the casing 131, and a plugging block rotating shaft 133 is arranged in the casing 131, and the plugging block rotating shaft 133 is matched with the plugging block rotating shaft hole 114 And rotatably connected, the shaft sleeve 11 cooperates with the plug shaft hole 114 and the plug shaft 133 to rotate vertically relative to the stopper 13, so that the direction bar 101 can be folded relative to the stopper 13 under the drive of the shaft sleeve 11, wherein an avoidance groove 132 is also provided in the middle of the top surface of the casing 131.

Further, as shown in FIG. 8 , the side of the limiting member 13 facing away from the support rod 14 is provided with a casing 131 , the end surface and the bottom surface of the casing 131 are open, and an avoidance groove 132 is opened in the middle of the top surface of the casing 131 , and an inserting block rotating shaft 133 is also connected inside the casing 131 . 3 turn;

Specifically, a casing 131 is provided on the side of the limiting member 13 away from the support rod 14, and the casing 131 is adapted to the connecting plug 112. The connecting plug 112 is inserted into the casing 131, and an avoidance groove 132 is also provided in the middle of the top surface of the casing 131. The inserting block 112 is rotatably connected with the inserting block rotating shaft 133 through the inserting block rotating shaft hole 114 , so that the shaft sleeve 11 can rotate vertically relative to the limiting member 13 .

Further, as shown in FIG. 7 , the sleeve 11 is also rotatably connected with a folding control handle 12 , and the folding control handle 12 includes: a handle 121 and a rod 122 ; One end is also provided with a rotating shaft sliding hole 124, the first locking pin 125 is movable in the rotating shaft sliding hole 124, the rod portion 122 is located in the plug sliding groove 113 and the avoidance groove 132, the two ends of the first bayonet pin 125 are respectively located in the waist-shaped sliding hole 115, and when the handle 121 rotates around the control rotating shaft 123, it drives the first locking pin 125 to move in the rotating shaft sliding hole 124 and the waist-shaped sliding hole 115;

Specifically, in order to realize the fixing of the shaft sleeve 11 relative to the stopper 13 and improve the stability of use, the shaft sleeve 11 is rotatably connected with a retractable control handle 12. The retractable control handle 12 includes: a rod portion 122 and a handle portion 121. The handle portion 121 is convenient for the user to move. The rod portion 122 is used to rotate and connect with the connecting plug 112. 23. The control shaft 123 is adapted to the control shaft hole 116 and connected in rotation. The rod portion 122 can rotate on the connecting plug 112, wherein the rod portion 122 is located in the plug slide groove 113 and the avoidance groove 132. A shaft sliding hole 124 is also provided between the control shaft 123 and the handle 121 of the rod portion 122. A first bayonet 125 is arranged in the shaft sliding hole 124, and the first bayonet pin 125 can slide on the shaft. Slide in the hole 124, and the two ends of the first bayonet 125 also penetrate in the waist-shaped sliding hole 115, because the movement track of the rod 122 is arc-shaped, and the first bayonet 125 can only translate and cannot move up and down, if there is no rotating shaft sliding hole 124, there will be motion interference. In order to prevent the first bayonet pin 125 from moving laterally, clip springs are provided at both ends of the first bayonet pin 125 .

Further, as shown in FIG. 8 , first U-shaped holes 134 are provided on both sides of the opening of the casing 131, and second U-shaped holes 135 are respectively provided on both sides of the bottom surface of the opening of the casing 131. When the bushing 11 rotates relative to the limiting member 13, the first bayonet pin 125 snaps into the corresponding first U-shaped hole 134 or the second U-shaped hole 135;

Specifically, in order to form cooperation with the first bayonet pin 125 and realize the angle fixation of the shaft sleeve 11 relative to the limiter 13, a first U-shaped hole 134 is respectively provided on both sides of the end surface of the opening of the casing 131, and a second U-shaped hole 135 is respectively provided on both sides of the bottom surface of the opening of the casing 131. The handle 121 drives the first bayonet pin 125 to break away from the first U-shaped hole 134. At this time, the shaft sleeve 11 can be rotated relative to the limiter 13. When the axle sleeve 11 is at a second angle relative to the limiter 13, the first bayonet pin 125 can be snapped into the second U-shaped hole 135 to realize the limit at the second angle. When the limit needs to be released, the same as above. Wherein the interval angle between the first U-shaped hole 134 and the second U-shaped hole 135 is equal to 90°.

Further, as shown in FIG. 7 , the bottom surface of the connecting plug 112 is also fixedly connected with a first tension spring 117 , and the end of the first tension spring 117 away from the connection with the connecting plug 112 is fixedly connected with the end of the rod 122 provided with the control shaft 123 . Specifically, in order to realize the automatic cooperation of the first bayonet 125 with the first U-shaped hole 134 and the second U-shaped hole 135 , a first tension spring 117 is also fixedly connected with the bottom of the connecting plug 112 . One end of the first extension spring 117 away from the connecting plug 112 is fixedly connected with the end of the rod portion 122 provided with the control shaft 123. Because it needs to act on the first bayonet pin 125 all the time, and the first bayonet pin 125 moves away from the direction where the axle sleeve 11 is located, so the connection position between the first extension spring 117 and the rod portion 122 needs to be on the side of the rod portion 122 away from the axle sleeve 11, so that the rod portion 122 is pulled by the first extension spring 117. Push the first locking pin 125 to move away from the shaft sleeve 11, so that when the shaft sleeve 11 and the limiting member 13 are at the first angle or the second angle, they can automatically snap into the corresponding first U-shaped hole 134 or the second U-shaped hole 135.

It should be pointed out that the first extension spring 117 can also be arranged between the handle 121 and the limiting member 13. Specifically, if the handle 121 needs to be inclined toward the direction of the support rod 14 so that the first bayonet 125 moves toward the direction of the supporting rod 14, the first extension spring 117 can also be arranged between the handle 121 and the limiting member 13.

Further, as shown in FIG. 1 and FIG. 9 , the same ends of the two support rods 14 are respectively rotatably connected to the limiter 13, and the ends of each support rod 14 away from the limiter 13 are respectively rotatably connected to a connecting sleeve 141, and the opposite sides of the two connecting sleeves 141 are inclined at a predetermined angle in the opposite direction, so that the ends of the two support rods 14 away from the connecting sleeve 141 rotate horizontally around the connecting sleeve 141 to form a triangular structure;

Concrete, the limiter 13 faces away from the opening on one side of the casing 131, and the same ends of the two support rods 14 are respectively inserted into one side of the limiter 13 opening and are rotatably connected with the limiter 13, so that the two support rods 14 can rotate relative to the limiter 13 respectively, and the maximum angle of outward rotation is limited by the side wall of the limiter 13. Rotate horizontally at a certain angle in the opposite direction, and the opposite side of the two connecting sets 141, which are located at one end rotatably connected to the support rod 14, are inclined at a predetermined angle, so that the ends of the two support rods 14 away from the connecting set 141 can approach each other or move away from each other. When they are close to each other, a triangular structure is formed, and the stability is stronger. If they are far away from each other, a rectangular structure or a regular trapezoidal structure is formed. In this application, it is preferably a triangular structure to ensure stability.

It should be noted that the opposite sides of the two connecting sleeves 141 can also be provided with openings, so that the two support rods 14 can rotate in opposite directions;

Further, as shown in FIG. 9 , the connecting sleeve 141 is provided with a connecting shaft 142 at one end away from the supporting rod 14 , and the two ends of the connecting shaft 142 pass through both sides of the connecting sleeve 141 respectively, and a displacement sliding hole 143 is opened in the middle of the connecting sleeve 141 , and a second bayonet 144 is arranged in the displacement sliding hole 143 , and two second extension springs 145 are connected between the second bayonet 144 and the connecting shaft 142 ;

Specifically, in order to improve the use stability and effect of the handle of the multi-purpose folding trailer, the end of the connection kit 141 away from the support rod 14 is provided with a connection shaft 142. The pin 144 can cooperate with the external trailer by itself to limit the position. Two second tension springs 145 are also arranged between the second bayonet 144 and the connecting shaft 142. By the tension of the two second tension springs 145, the second bayonet 144 is always moved in the direction where the connecting shaft 142 is located, so that after the position is corresponding, the second bayonet 144 can cooperate with the external trailer to realize the position limiting.

Further, the first bayonet 125 is connected with two linkage lines (not shown in the figure), and the ends of the two linkage lines away from the first bayonet 125 are respectively connected to the two second bayonets 144, so that when the first bayonet 125 is displaced by the folding control handle 12, the second bayonet 144 is linked with the first bayonet 125 through the linkage line;

Specifically, in order to realize the synchronous release of the first bayonet 125 and the second bayonet 144, the present application connects a linkage line between the first bayonet 125 and the two second bayonets 144 respectively. Through the setting of the linkage line, the first bayonet 125 and the second bayonet 144 can be linked. For example, when the handle 121 is moved, it will drive the first bayonet 125 to move. 144 will be pulled synchronously, and stretch the second extension spring 145 at the same time, so as to realize the linkage between the first bayonet 125 and the second bayonet 144;

It should be noted that the fixing methods of the first bayonet pin 125, the second bayonet pin 144, and the rotating shaft in the present application all use snap springs, that is, snap springs are respectively arranged at both ends of the bayonet pin and the rotating shaft, and the position is limited by the cooperation between the snap springs and the structure to avoid unnecessary displacement.

The folding process of the handle of the multi-purpose folding trailer: Take Figure 1 as an example, this is the first state; when it needs to be folded, first move the handle 121, so that the rod 122 is driven by the handle 121 to rotate around the control shaft 123, and the rod 122 drives the first bayonet 125 to move away from the first U-shaped hole 134. Part 13 rotates vertically, and shaft sleeve 11 drives sleeve rod 103 to rotate so that it is in a parallel state with support rod 14. The axial movement of sleeve rod 103 relative to shaft sleeve 11 can be determined according to requirements. 1033 cooperates to realize the fixation of the sleeve rod 103, so far the folding of the handle of the multi-purpose folding trailer is completed; it should be pointed out that since the steering wheel 1036 is provided with a front fork, the axle sleeve 11 rotates relative to the stopper 13 in the first state, and after the first bayonet pin 125 enters the second U-shaped hole 135, because the side wall of the front fork is in contact with the bottom surface of the stopper 13 and is restricted by the stopper 13, the direction wheel 1036 cannot rotate under the influence of gravity Or rotate during the initial stage of folding.

The second embodiment of the present invention, as shown in FIG. 10 , provides a foldable trailer, including a foldable body 15, a multipurpose foldable trailer handle as described in any one of the above embodiments; the foldable body 15 can be folded and contracted, and power wheels 153 are respectively installed on both sides of the rear end of the foldable body 15, and the electric wheels 153 are used to drive the foldable body 15 to advance after electrification; and the electric wheel 153 to provide electric power, the controller 151 is used to receive instructions to control the power supply 152 and the electric wheel 153, auxiliary wheels 154 are detachably connected to both sides of the front end of the folding car body 15, and load-bearing bases 155 are respectively provided on both sides of the front end of the folding car body 15, and the support rod 14 of the handle of the multi-purpose folding trailer is connected to the load-bearing base 155;

Specifically, the foldable trailer is driven by electricity and can be folded and contracted. It includes: a foldable car body 15 and the multipurpose foldable trailer handle described in any one of the above-mentioned embodiments; a controller 151 and a power supply 152 electrically connected to the controller 151 are arranged on the foldable car body 15; Forward or backward, and the electric wheel 153 also has brake structures such as disc brakes or drum brakes, wherein the outer shell of the brake structure needs to be fixedly connected with the wheel fork of the electric wheel 153 to prevent the shell from rotating with the electric wheel 153; for details, please refer to the drive wheel of the electric bicycle in the prior art; Load-bearing bases 155 are respectively connected to both sides of the front end of the front end, and the load-bearing bases 155 are used to connect the vehicle frame and to be rotationally connected with the connecting kit 141 of the handle of the multi-purpose folding trailer, so that the support rod 14 can rotate vertically relative to the folding car body 15 through the connecting kit 141 to achieve the effect of folding.

It should be noted that, as shown in Fig. 10, Fig. 15, Fig. 16 and Fig. 17, the controller 151 also leads to a wire which extends to the front end of the folding car body 15, and is used to connect with the integrated wire 1026 of the multi-purpose folding trailer handle, so that the movement of the folding trailer can be controlled through the multi-purpose folding trailer handle. When a certain control button 1025 is pressed, a corresponding signal will be generated. 1 will receive the control signal of the forward key and enter the forward mode. After receiving the signal from the vehicle speed control structure, the controller 151 controls the motor in the electric wheel 153 to rotate forward, and if it is the reverse key, it will reverse;

Further, as shown in Figure 14, the height of the auxiliary wheel 154 is smaller than the height of the power wheel 153 and the direction wheel 1036;

Specifically, because the rear end of the folding car body 15 is provided with a power wheel 153, when the folding car body 15 is used in conjunction with the handle of a multi-purpose folding trailer, there are three wheels between the power wheel 153 and the steering wheel 1036. Because the structure of the three wheels is easy to cause rollover due to gravity deviation during driving, especially when turning, the front end of the folding car body 15 can also be detachably provided with an auxiliary wheel 154. The auxiliary wheel 154 is a universal wheel. The two sides of the car body 15 form supports to improve the stability of the folding trailer while driving and avoid rollover. However, in actual use, the support of the auxiliary wheel 154 will cause the friction between the steering wheel 1036 and the driving wheel and the ground to reduce and slip easily. 53 and the frictional force on the ground to avoid slipping, and can also support the folding trailer when the folding trailer rolls over to one side, so as to avoid rollover.

Wherein, the auxiliary wheel 154 can also be set to a telescopic structure or a rotating structure, wherein the telescopic structure is that it can be stretched out or retracted on the folding car body 15 to achieve the effect of lifting off the ground;

It should be noted that, in order to avoid rollover, it is also possible to set two steering wheels 1036 with a certain distance between the two steering wheels 1036, so that it can produce the effect of auxiliary wheels 154, which can reduce the risk of rollover.

Further, as shown in FIG. 10 , one end of the load-bearing base 155 is provided with a foldable seat 156 with an open end surface and a top surface, the connecting shaft 142 of the connection kit 141 is rotatably connected with the foldable seat 156 , and the two sides of the top surface of the foldable seat 156 are respectively provided with third U-shaped holes 157, and the third U-shaped holes 157 are used to cooperate with the second bayonet pin 144. The C-shaped hole 158 is used to cooperate with the second bayonet pin 144 to limit the position, and the length of the C-shaped hole 158 is greater than the width of the second bayonet pin 144;

Specifically, in order to improve the use experience and stability of use, a folding seat 156 with an end surface and an open top surface is provided on the end surface of the load-bearing base 155 facing the handle of the multi-purpose folding trailer, wherein the connecting shaft 142 of the connecting kit 141 is connected to the folding seat 156 in rotation, and a third U-shaped hole 157 and a C-shaped hole 158 are provided on the folding seat 156, which are used to cooperate with the second bayonet pin 144 to realize the fixed position of the connecting kit 141 and the folding car body 15, avoiding the need to rotate When rotating, it affects the use. The length of the C-shaped hole 158 can be greater than or equal to the width of the second bayonet 144. In this embodiment, it is preferably larger than the width of the second bayonet 144. When the second bayonet 144 is located in the C-shaped hole 158, the connecting sleeve 141 can be rotated downward by a certain angle relative to the folding seat 156, so as to drive on uneven roads. .

Further, a folding seat 16 is detachably installed above the front end of the folding car body 15, and a seat support 161 is provided at the bottom of the folding seat 16, and the seat support 161 is connected with the folding car body 15;

Specifically, in order to improve the comfort of the user when driving the foldable trailer, a foldable seat 16 can also be disassembled and installed above the front end of the foldable car body 15, and in order to enhance the supporting force of the foldable seat 16, base supports are provided on the bottom of one end of the foldable seat 16 away from the front end of the foldable car body 15.

Wherein for the convenience of the user standing on the handle of the multi-purpose folding trailer, a pedal can be detachably set between the two support rods 14 .

This application achieves different use effects through different folding methods, as follows:

One, the driving posture as shown in Figure 11, i.e. the first state; when the support bar 14 is parallel to the longitudinal direction of the car body, and the sleeve bar 103 and the support bar 14 are in an angled state, the user can stand on the support bar 14, and control the travel of the folding car body 15 through the control buttons 1025 of the handle ring 102, so as to realize the functions of driving and carrying people.

Second, in the towing posture as shown in Figure 12, when the battery is dead or the driving function is not needed in the driving posture, the handle 121 can be moved to drive the rod 122 to rotate around the control shaft 123, and the rod 122 drives the first bayonet pin 125 to move away from the first U-shaped hole 134. At the same time, the first bayonet pin 125 drives the second bayonet pin 144 to break away from the C-shaped hole 158 through the linkage line. The spacing of pin 125 is to rotate the axle sleeve 11 so that it rotates vertically relative to the stopper 13. The axle sleeve 11 drives the sleeve bar 103 to rotate so that the sleeve bar 103 is located below the stopper 13. 35 is in a misplaced state and cannot be snapped in. In order to avoid this situation, you can pull the retractable bayonet pin 111 at this time to make it break away from the arc pin hole 1032, and then apply a force on the sleeve rod 103 to make it move relative to the shaft sleeve 11 and drive the direction wheel 1036 away from the stopper 13. 5 will correspond to the second U-shaped hole 135. If the handle is released, the first bayonet pin 125 will automatically snap into the second U-shaped hole 135 under the force of the first tension spring 117 to form a fit to realize the fixing of the sleeve rod 103 in this state. At the same time, because the second bayonet pin 144 is separated from the C-shaped hole 158, after losing the restriction of the second bayonet pin 144, the support rod 14 can rotate relative to the folding car body 15 through the connection kit 141 and make it in an inclined state. The conversion of the dragging posture is convenient for dragging. In this state, the dragging assist speed control key in the control button 1025 can be toggled to achieve the assisting effect. It should be pointed out that in this state, in order to improve the labor-saving of towing, the position of the bushing 11 relative to the sleeve rod 103 must be in the middle of the sleeve rod 103. In this position, it is possible to avoid the rearward steering wheel 1036, so that the center of gravity of the multi-purpose folding trailer handle is rearward, which brings more laborious situation to towing. At the same time, the direction bar 101 can also be pulled out according to the needs of use, so as to extend the length of the handle of the multi-purpose folding trailer and facilitate towing.

Third, the folded posture as shown in Figure 13, this posture needs to further rotate the support rod 14 in the dragging posture, so that it is vertical relative to the folding car body 15, and the relative position of the axle sleeve 11 and the sleeve rod 103 is at the top of the sleeve rod 103, and the sleeve rod 103 is fixed through the folding bayonet 111 and the folding adjustment hole 1033 at the top of the sleeve rod 103. When folding the trailer, it is also necessary to remove the folding seat board to avoid affecting the folding.

It should be pointed out that the first bayonet 125 and the second bayonet 144 can also be independently controlled to realize the release of the limit, that is, the release of the first bayonet 125 will not drive the second bayonet 144 to release the limit. Release, in order to avoid inconvenience to use, the second bayonet 144 can be set as a structure such as the telescopic bayonet 1031, and it is arranged on the opposite side of the two retractable seats 156, and the head of the telescopic bayonet 1031 pops up and touches the top surface or the bottom surface of the connecting sleeve 141, thereby realizing the limit. The head of the telescopic bayonet 1031 can be retracted by the rotation of the pull wire, so as to realize the release of the limit.

Wherein, when the second bayonet 144 is replaced with the mode of the telescopic bayonet 1031, only one telescopic bayonet 1031 needs to be provided on each folding seat 156, and the position of the telescopic bayonet 1031 is at the intersection of the bottom surface line of the connecting kit 141 in the folded posture and the top surface line of the riding posture, so that a telescopic bayonet 1031 can realize the limiting effect in both postures.

The present invention also provides a third embodiment. The third embodiment includes a folding car body 15 and a multipurpose folding trailer handle. The difference is that the multipurpose folding trailer handle includes: a direction rod 101, a handle ring 102, a shaft sleeve 11, and a support rod 14; the shaft sleeve 11 and the direction rod 101 are rotationally connected. In the same manner, the end of the support rod 14 away from the axle sleeve 11 is welded or clamped to the load-bearing base 155 of the folding car body 15. In the third embodiment, since the handle of the multi-purpose folding trailer cannot be folded, the setting of the limiter 13, the connecting kit 141, the first bayonet pin 125, the second bayonet pin 144, and the folding control handle 12 can be omitted at this time.

It can be seen from the above that the multi-purpose folding control handle of the present application can be adapted to all folding car bodies with or without electric drive on the market. Among them, the folding car bodies without electric drive can be towed by the multi-purpose folding control handle, and those with electric drive can be used for driving or assisted towing.

To sum up, the present invention sets the shaft sleeve and the limiter in a rotational connection, so that the handle of the multi-purpose folding trailer can have various forms, which can be converted according to the usage conditions to improve the practicability, and the handle of the multi-purpose folding trailer has a control function, and can be adapted to a folding car body with electric drive or an ordinary folding car body without limitation.

The present invention is not limited to what has been described in the specification and the embodiments, so that additional advantages and modifications can readily be realized by those skilled in the art, so that the invention is not limited to the specific details, representative apparatus 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 (21)

1. A multipurpose folding trailer handle comprising: the steering rod assembly, the bottom of steering rod assembly is connected with at least one direction wheel, the direction wheel is along with the steering rod assembly rotates, the bottom of steering rod assembly is located the top of direction wheel is equipped with the axle sleeve, the axle sleeve is used for making the steering rod assembly rotates, one side of axle sleeve is connected with the locating part, be connected with a bracing piece on the locating part at least.

2. The multipurpose folding trailer handle as claimed in claim 1, wherein said steering rod assembly comprises: the telescopic steering device comprises a sleeve rod and a steering rod, wherein the steering rod is arranged in the sleeve rod in a telescopic mode, a clamping device which limits the axial movement and radial rotation of the steering rod is arranged between the steering rod and the sleeve rod, the top end of the steering rod is further connected with a handle ring, and the handle ring drives the sleeve rod to rotate through the steering rod.

3. The multipurpose folding trailer handle as claimed in claim 2, wherein said snap-in means comprises: the telescopic clamping pin is arranged at the top of the loop bar, and the telescopic clamping hole is arranged on the side wall of the steering rod and matched with the telescopic clamping pin.

4. The multipurpose folding trailer handle as claimed in claim 2, wherein a mounting hole is formed in the bottom of the handle ring, the top end of the steering rod is inserted into the mounting hole in the bottom of the handle ring, a rotation limiting bayonet lock is formed on the top end side wall of the steering rod, and a plurality of rotation limiting holes matched with the rotation limiting bayonet lock are formed on the side wall of the mounting hole in the bottom of the handle ring.

5. The multipurpose folding trailer handle as claimed in claim 2, wherein the handle ring is in an inverted trapezoid shape, folding grooves are respectively formed on two sides of the handle ring, a holding rod is rotatably connected to the same ends of the two folding grooves, and a limiting device is further arranged at one end of the holding rod connected with the folding grooves, and is used for limiting when the holding rod is contained in the folding grooves or when the holding rod is horizontal relative to the handle ring.

6. The multipurpose folding trailer handle as claimed in claim 2, wherein said handle ring is further provided with a plurality of control keys, a plurality of said control keys being connected with an integrated wire.

7. The multipurpose folding trailer handle as claimed in claim 2, wherein the sleeve is movably connected with the sleeve rod, the sleeve rod is displaced and/or rotated relative to the sleeve rod, an arc-shaped pin hole with a predetermined angle is formed in the bottom of the sleeve rod within the range of the sleeve rod, and a folding bayonet is formed at a position of the sleeve rod corresponding to the arc-shaped pin hole.

8. The multipurpose folding trailer handle as claimed in claim 7, wherein the loop bar is further provided with a plurality of folding adjustment holes, the folding adjustment holes are matched with the folding bayonet, and the loop bar is further provided with a rotation limiting chute which corresponds to and is matched with the folding bayonet.

9. The multipurpose folding trailer handle as claimed in claim 2, wherein the inner wall of the loop bar is provided with a protruding rotation limiting protrusion, and the outer side wall of the steering bar is provided with a rotation limiting groove adapted to the rotation limiting protrusion.

10. The multipurpose folding trailer handle as claimed in claim 1, wherein the shaft sleeve is rotatably connected with the limiting member, one side of the shaft sleeve is further provided with an extended connecting plug, a plug sliding groove is formed in the middle of the top surface of the connecting plug, a plug rotating shaft hole is formed in the side wall of one end of the connecting plug, which is far away from the shaft sleeve, a waist-shaped sliding hole is formed in the side wall of the connecting plug, which is arranged at an interval with the plug rotating shaft hole, and a control rotating shaft hole is formed below the waist-shaped sliding hole.

11. The multipurpose folding trailer handle as claimed in claim 10, wherein a casing is provided on a side of the limiting member facing away from the supporting rod, an end surface and a bottom surface of the casing are opened, an avoidance groove is provided in the middle of the top surface of the casing, an insert rotating shaft is further connected in the casing, the insert rotating shaft is rotatably connected with the insert rotating shaft hole, and the shaft sleeve rotates relative to the limiting member through the insert rotating shaft.

12. The multipurpose folding trailer handle as claimed in claim 11, wherein said sleeve is further rotatably connected with a folding lever, said folding lever comprising: a handle portion, a stem portion; the utility model provides a handle, including handle, pole portion, handle, control pivot, pole portion, control pivot hole, pivot, pole portion is located the pole portion is kept away from the one end of handle is equipped with the control pivot, the control pivot with the one end of control pivot still is equipped with the pivot slide hole, pivot slide hole internalization is equipped with first bayonet lock, pole portion is located the inserts spout with dodge the inslot, the both ends of first bayonet lock are located respectively in the kidney-shaped slide hole, the handle winds when the control pivot rotates drive first bayonet lock in the pivot slide hole with kidney-shaped slide hole is internal to be removed.

13. The multipurpose folding trailer handle as claimed in claim 12, wherein a first U-shaped hole is formed on two sides of an end surface of the casing opening, a second U-shaped hole is formed on two sides of a bottom surface of the casing opening, and the first bayonet lock is snapped into the corresponding first U-shaped hole or the second U-shaped hole when the sleeve rotates relative to the stopper.

14. The multipurpose folding trailer handle as claimed in claim 13, wherein the bottom surface of the connection plug is further fixedly connected with a first tension spring, and one end of the first tension spring, which is far away from the connection plug, is fixedly connected with one end of the rod portion, which is provided with the control rotation shaft.

15. The multipurpose folding trailer handle as claimed in claim 14, wherein the same ends of the two support rods are respectively rotatably connected with the limiting members, and one end of each support rod far away from the limiting members is respectively rotatably connected with a connecting sleeve member, and opposite faces of the two connecting sleeve members are inclined by a predetermined angle in opposite directions, so that one end of the two support rods far away from the connecting sleeve members horizontally rotates around the connecting sleeve member to form a triangular structure.

16. The multipurpose folding trailer handle as claimed in claim 15, wherein a connecting shaft is arranged at one end of the connecting sleeve, which is far away from the supporting rod, two ends of the connecting shaft respectively penetrate through two sides of the connecting sleeve, a displacement sliding hole is formed in the middle of the connecting sleeve, a second bayonet lock is arranged in the displacement sliding hole, and two second tension springs are connected between the second bayonet lock and the connecting shaft.

17. The multipurpose folding trailer handle as claimed in claim 12 or 16, wherein the first bayonet is connected with two linkage lines, and one ends of the two linkage lines away from the first bayonet are respectively connected with two second bayonet, so that when the first bayonet is driven to displace by the folding control handle, the second bayonet is linked with the first bayonet through the linkage lines.

18. A folding trailer comprising a folding body, a multipurpose folding trailer handle as claimed in any one of claims 1 to 17; the folding car body is foldable and contractible, the electric power wheel is installed respectively to the rear end both sides of folding car body, the electric power wheel is used for driving after the circular telegram folding car body marches, still be equipped with controller and power on the folding car body, the power is used for the controller with the electric power wheel provides electric power, the controller is used for receiving instruction control the power with the work of electric power wheel, the front end both sides of folding car body can be dismantled respectively and be connected with the auxiliary wheel, the front end both sides of folding car body still are equipped with the bearing base respectively, the bracing piece of multipurpose folding trailer handle with the bearing base is connected.

19. The folding trailer of claim 18 wherein the auxiliary wheels have a height that is less than the heights of the power wheels and the steering wheels.

20. The folding trailer of claim 18, wherein one end of the bearing base is provided with a folding seat with an end face and a top face open, the connecting shaft of the connecting sleeve is rotatably connected with the folding seat, the two sides of the top face of the folding seat are respectively provided with a third U-shaped hole, the third U-shaped holes are used for being matched and limited with the second bayonet, the two sides of the end face of the folding seat are respectively provided with a C-shaped hole, the C-shaped holes are used for being matched and limited with the second bayonet, and the length of the C-shaped holes is larger than the width of the second bayonet.

21. The folding trailer of claim 18, wherein a folding seat is removably mounted above the front end of the folding body, the bottom of the folding seat being provided with a seat support, the seat support being connected to the folding body.