CN220410737U - Electric traction head and trailer - Google Patents

Abstract

This application discloses an electric tractor and a trailer, which include: a direction rod assembly, the bottom end of the direction rod assembly is connected to a first wheel, the direction rod assembly is connected to an adapter kit, and the adapter kit is connected to at least two tow bar assemblies. One end of each drawbar assembly is connected to a traction device, one end of each drawbar assembly is connected to a second wheel, the drawbar assembly is provided with a power supply and a controller, the direction rod assembly is electrically connected to the controller, and the above design is adopted , by connecting the traction seat at the rear end of the drawbar and setting a traction device on the traction seat, the electric traction head can be adapted to other car bodies, and the drawbar is rotationally connected to the adapter kit, so that it can adapt to different sizes The car body and different types of car bodies further improve the practicality, and the direction rod assembly can be folded through the adapter kit to reduce the space occupied. At the same time, the electric traction head can drive by itself, making the use of the electric traction head more abundant and satisfying. usage requirements of each scenario.

Description

Electric traction head and trailer

Technical Field

The utility model relates to the technical field of trailers, in particular to an electric traction head and a trailer.

Background

The foldable trailer is a foldable and draggable carrying vehicle, is convenient to store and store due to simple use and can be widely applied to outdoor activities or short-distance transportation when carrying things.

When the traditional trailer is used, the manual dragging is needed, time and labor are wasted, and particularly, the traditional trailer is inconvenient to carry on an uphill; for this reason, designers have still designed a helping hand trailer, patent number is CN202220922980.0 (helping hand trailer) it is through setting up electric wheel and controlling means on the automobile body, electric helping hand effect when realizing the trailer, the laborsaving nature of promotion trailer when using, the convenience, but this kind of scheme still has drawbacks, though can save strength to a certain extent, but its use still needs the people to pull in the place ahead to go, this kind of mode can only reduce the power that the user drags the trailer, but this kind of trailer can't realize manned function, so that the user can't avoid the needs hiking, produce the tired sense easily, influence the use experience sense, the steering yoke subassembly of current electric trailer all does not possess the suitability simultaneously, the steering yoke subassembly of a motorcycle type can't be with other motorcycle types adaptation promptly, the suitability is low.

Accordingly, there is a need to design an electric traction head and trailer that overcomes one or more of the above-described deficiencies in the prior art.

Disclosure of Invention

The technical scheme adopted by the utility model for achieving the technical purpose is as follows: an electric traction head comprising: the steering rod assembly, the bottom of steering rod assembly is connected with first wheel, the steering rod assembly is connected with the switching external member, the switching external member is connected with two at least traction lever assemblies, every the traction lever assembly keeps away from the one end of switching external member all is connected with draw gear, every the traction lever assembly keeps away from the one end of switching external member all is connected with the second wheel, first wheel and/or the second wheel is used for the drive the traction lever assembly walks, be equipped with on the traction lever assembly and be used for giving first wheel and/or the power of second wheel power supply and be used for controlling first wheel and/or the controller of second wheel walking, the steering rod assembly with the controller electricity is connected.

In a preferred embodiment, each of the drawbar assemblies comprises: a traction rod, a connecting piece and a traction seat; the connecting piece with the one end of traction lever rotates to be connected, the one end of traction seat with the connecting piece is kept away from the one end of traction lever rotates to be connected, draw gear with the traction seat is kept away from the one end of connecting piece rotates to be connected, the traction lever keep away from with the one end of connecting piece with the switching external member rotates to be connected.

In a preferred embodiment, a limiting structure matched with the two traction rods is arranged in the switching sleeve, and the limiting structure is used for enabling the two traction rods to rotate synchronously.

In a preferred embodiment, the end face and the top face of the traction seat far away from the traction device are open, one end of the connecting piece far away from the traction rod is inserted into the traction seat and vertically and rotatably connected with the traction seat, the end face of the opening of the traction seat is provided with a first clamping groove, and the top face of the opening of the traction seat is provided with a second clamping groove.

In a preferred embodiment, one end of the connecting piece, which is far away from the traction rod, is provided with a connecting shaft, one end of the connecting piece, which is provided with the connecting shaft, is inserted into the traction seat and is rotationally connected with the traction seat through the connecting shaft, a displacement sliding hole is formed in the middle of the connecting piece, a first clamping pin is arranged in the displacement sliding hole, two second tension springs are connected between the first clamping pin and the connecting shaft, the first clamping pin is matched with the first clamping groove and the second clamping groove, and two opposite surfaces of the connecting piece incline to opposite directions by a preset angle.

In a preferred embodiment, the steering rod assembly comprises: loop bar, steering yoke, the steering yoke is flexible to be located in the loop bar, just the steering yoke with be equipped with a restriction between the loop bar steering yoke axial activity and radial pivoted joint device, the top of steering yoke still is connected with the handle ring, the handle ring passes through the steering yoke drives the loop bar rotates, joint device includes: 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; the inner wall of the loop bar is provided with a convex rotation limiting lug, and the outer side wall of the steering bar is provided with a rotation limiting groove matched with the rotation limiting lug.

In a preferred embodiment, 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 plurality of rotation limiting holes are formed in the side wall of the top end of the steering rod along the circumference, rotation limiting bayonet locks matched with the rotation limiting holes are arranged on the side wall of the mounting hole in the bottom of the handle ring, folding grooves are formed in two sides of the handle ring respectively, two holding rods are connected with the same ends of the folding grooves in a rotating mode, limiting devices are further arranged at one ends of the holding rods, connected with the folding grooves, and used for limiting when the holding rods are contained in the folding grooves or when the holding rods are horizontal relative to the handle ring, a plurality of control keys are further arranged on the handle ring, and a plurality of control keys are connected with integrated wires.

In a preferred embodiment, the adapter kit comprises: shaft sleeve and limiting piece; 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 preset angle is formed in the range of the sleeve rod, and a folding bayonet lock is arranged at the position, corresponding to the arc-shaped pin hole, of the sleeve rod; the sleeve rod is also provided with a plurality of folding adjusting holes which are matched with the folding bayonet locks, the sleeve rod is also provided with a rotation limiting chute which corresponds to and is matched with the folding bayonet locks, one side of the shaft sleeve is also provided with a connecting plug block which extends out, the middle part of the top surface of the connecting plug block is provided with a plug block chute, one end side wall of the connecting plug block, which is far away from the shaft sleeve, is provided with a plug block rotating shaft hole, the side wall of the connecting plug block is also provided with a waist-shaped sliding hole which is arranged at intervals with the plug block rotating shaft hole, and the lower part of the waist-shaped sliding hole is provided with a control rotating shaft hole; one side of locating part is equipped with the cover shell, terminal surface and the bottom surface opening of cover shell, dodge the groove has been seted up in the middle of the top surface of cover shell, still be connected with the inserted block pivot in the cover shell, the inserted block pivot with the inserted block pivot hole rotates to be connected, the axle sleeve passes through the inserted block pivot is relative the locating part rotates, the traction lever with the locating part is kept away from one side of cover shell rotates to be connected.

In a preferred embodiment, the sleeve is also rotatably connected with a folding control handle, the folding control handle comprising: a handle portion, a stem portion; the rod part is fixedly connected with the handle part, one end of the rod part, which is far away from the handle part, is provided with a control rotating shaft, the control rotating shaft is in fit and rotary connection with the control rotating shaft hole, one end of the rod part, which is provided with the control rotating shaft, is also provided with a rotating shaft sliding hole, a second bayonet lock is movably arranged in the rotating shaft sliding hole, the rod part is positioned in the inserting block sliding groove and the avoiding groove, two ends of the second bayonet lock are respectively positioned in the kidney-shaped sliding hole, and the handle part drives the second bayonet lock to move in the rotating shaft sliding hole and the kidney-shaped sliding hole when rotating around the control rotating shaft; the sleeve is characterized in that first U-shaped holes are respectively formed in two sides of the end face of the sleeve opening, second U-shaped holes are respectively formed in two sides of the bottom face of the sleeve opening, and the second clamping pin is clamped into the corresponding first U-shaped holes or the second U-shaped holes when the shaft sleeve rotates relative to the limiting piece.

In a preferred embodiment, the bottom surface of the connecting plug is also fixedly connected with a first tension spring, and one end, far away from the connection with the connecting plug, of the first tension spring is fixedly connected with one end, provided with the control rotating shaft, of the rod part; the second bayonet lock is connected with two linkage lines, two the linkage line keep away from the one end of second bayonet lock respectively with two first bayonet lock is connected, makes the second bayonet lock by when folding control handle drives the displacement, the second bayonet lock passes through the linkage line with first bayonet lock linkage.

In a preferred embodiment, the adapter kit comprises: shaft sleeve and limiting piece; the shaft sleeve is fixedly connected with the steering rod assembly, the shaft sleeve is positioned in the middle of the steering rod assembly, the steering rod assembly rotates relative to the shaft sleeve, an arc-shaped pin hole with a preset angle is formed in the range of the shaft sleeve, and a folding bayonet lock is arranged at the position, corresponding to the arc-shaped pin hole, of the shaft sleeve; one side of the shaft sleeve is also provided with an extended connecting plug, the middle part of the top surface of the connecting plug is provided with a plug chute, one end side wall of the connecting plug, which is far away from the shaft sleeve, is provided with a plug rotating shaft hole, the side wall of the connecting plug is also provided with waist-shaped sliding holes which are arranged at intervals with the plug rotating shaft holes, and a control rotating shaft hole is arranged below the waist-shaped sliding holes; one side of locating part is equipped with the cover shell, terminal surface and the bottom surface opening of cover shell, dodge the groove has been seted up in the middle of the top surface of cover shell, still be connected with the inserted block pivot in the cover shell, the inserted block pivot with the inserted block pivot hole rotates to be connected, the axle sleeve passes through the inserted block pivot is relative the locating part rotates, the traction lever with the locating part is kept away from one side of cover shell rotates to be connected.

In a preferred embodiment, the upper part of the adapter sleeve is rotatably connected with a seat device.

Another aspect of the present utility model provides a trailer, comprising a vehicle body, an electric traction head according to any one of the above embodiments, wherein the electric traction head is detachably connected to one end of the vehicle body through a traction device, and at least one end of the vehicle body is provided with a third wheel.

The beneficial effects of the utility model are as follows: through the trailing end connection traction seat at the traction lever to set up draw gear on traction seat, make electric traction head can adapt other automobile bodies, and traction lever and switching external member rotate and be connected, make it can adapt not automobile bodies of equidimension and different grade type automobile body, further promote the practicality, and steering yoke subassembly realizes folding through the switching external member, reduces occupation space, simultaneously, electric traction head self can travel, makes electric traction head's use richer, satisfies the user demand of each scene.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the handle ring of the present utility model;

FIG. 3 is a schematic view of the steering column of the present utility model;

FIG. 4 is a schematic view of the structure of the loop bar of the present utility model;

FIG. 5 is a schematic view of the structure of the sleeve according to the present utility model;

FIG. 6 is a schematic view of the folding control handle of the present utility model;

FIG. 7 is a schematic view of a limiting member according to the present utility model;

FIG. 8 is a schematic view of the fifth wheel of the present utility model;

FIG. 9 is a schematic view of the drawbar assembly of the present utility model;

FIG. 10 is a schematic diagram of a second embodiment of the present utility model;

FIG. 11 is a schematic diagram of a first embodiment of the present utility model combined with a third embodiment;

FIG. 12 is a folding state diagram of the first embodiment in combination with the third embodiment of the present utility model;

FIG. 13 is a schematic circuit diagram of a controller according to the present utility model;

fig. 14 is a block diagram of an electrical connection of the present utility model.

In the figure:

10. a steering rod assembly; 101. a steering lever; 1011. a telescopic clamping hole; 1012. rotation limiting holes; 1013. a rotation limiting groove;

102. a handle ring; 1021. rotation limiting bayonet lock; 1022. a folding groove; 1023. a grip; 1024. a limiting device; 1025. a control key; 1026. integrating wires; 1027. a display screen;

103. a loop bar; 1031. a telescopic bayonet; 1032. arc pin holes; 1033. folding the adjusting hole; 1034. a rotation limiting chute; 1035. rotation limiting protruding blocks; 1036. a first wheel;

110. a switching sleeve; 11. a shaft sleeve; 111. folding bayonet lock; 112. connecting the plug blocks; 113. a plug sliding groove; 114. a plug rotating shaft 133 hole; 115. waist-shaped slide holes; 116. a control shaft 123 hole; 117. a first tension spring;

12. Folding the control handle; 121. a handle; 122. a stem portion; 123. a control rotating shaft; 124. a rotating shaft sliding hole; 125. a second bayonet lock;

13. a limiting piece; 131. a casing; 132. an avoidance groove; 133. a plug-in block rotating shaft; 134. a first U-shaped aperture; 135. a second U-shaped aperture;

14. a drawbar assembly; 140. a traction rod; 141. a connecting piece; 142. a connecting shaft; 143. a displacement slide hole; 144. a first bayonet; 145. a second tension spring; 146. a foot brake;

15. a traction seat; 151. a traction device; 152. a second wheel; 153. a first clamping groove; 154. a second clamping groove;

16. and a vehicle body.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled" and "mounted" should be interpreted broadly, and for example, "coupled" may or may not be detachably coupled; may be directly connected or indirectly connected through an intermediate medium. In addition, "communication" may be direct communication or may be indirect communication through an intermediary. Wherein, "fixed" means that the relative positional relationship is not changed after being connected to each other. References to orientation terms, such as "inner", "outer", "top", "bottom", etc., in the embodiments of the present utility model are merely to refer to the orientation of the drawings and, therefore, the use of orientation terms is intended to better and more clearly illustrate and understand the embodiments of the present utility model, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the embodiments of the present utility model.

In embodiments of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the embodiment of the present utility model, "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the utility model. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

As shown in fig. 1 to 14, a first embodiment of the present utility model provides an electric traction head, comprising: the steering rod assembly 10, the bottom end of the steering rod assembly 10 is connected with a first wheel 1036, the steering rod assembly 10 is connected with a switching sleeve 110, the switching sleeve 110 is connected with at least two traction rod assemblies 14, one end of each traction rod assembly 14, which is far away from the switching sleeve 110, is connected with a traction device 151, one end of each traction rod assembly 14, which is far away from the switching sleeve 110, is connected with a second wheel 152, the first wheel 1036 and/or the second wheel 152 are used for driving the traction rod assembly 14 to walk, a power supply (not shown in the figure) for supplying power to the first wheel 1036 and/or the second wheel 152 and a controller (not shown in the figure) for controlling the first wheel 1036 and/or the second wheel 152 to walk are arranged on the traction rod assembly 14, and the steering rod assembly 10 is electrically connected with the controller;

specifically, the traction rod assembly 14 is connected with the steering rod assembly 10 through the adapting sleeve 110, the bottom end of the steering rod assembly 10 is also connected with a first wheel 1036, the first wheel 1036 is controlled by the steering rod assembly 10 and rotates along with the rotation of the steering rod assembly 10, so as to realize the direction control, wherein the adapting sleeve 110 is movably connected with the steering rod assembly 10, so that the adapting sleeve 110 is not driven to rotate by the steering rod assembly 10 when rotating, the use is avoided, one end of the traction rod assembly 14, which is far away from the adapting sleeve 110, is connected with a traction device 151, the traction device 151 is used for being connected with an external trailer body 16, the traction device 151 can be in a columnar structure or a lantern ring structure or a tray structure, and the like, and in the embodiment, the traction device 151 is preferably in a columnar shape for convenience of description; the existing trailer body 16 is folded in a gathering way or folded in a doubling way or unfolded in a folding way, and is provided with four supporting rods, and the supporting rods are hollow for reducing weight and cost, so that the traction device 151 can be connected with the trailer body 16 through being spliced with the supporting rods to achieve a traction effect, a first wheel 1036 is detachably connected below the steering rod assembly 10, the first wheel 1036 is convenient to replace when needed, a second wheel 152 is detachably connected below one end of each traction rod assembly 14, which is far away from the steering rod assembly 10, the first wheel 1036 and the second wheel 152 can be used as driving wheels or can be used as driving wheels, the first wheel 1036 is preferably used as the driving wheels in the embodiment, the front driving mode is easier to achieve a rugged road surface, such as a passing bank, the passing performance is stronger, the front driving mode is stronger, and the traction effect of a large load is better; the driving wheel is a wheel with an in-wheel motor inside, and can refer to a driving wheel of an electric bicycle or an electric motorcycle, and meanwhile, a controller for controlling the first wheel 1036 and/or the second wheel 152 and a power supply for supplying electric energy are arranged on the traction rod assembly 14, so that the electric traction head is provided with walking power, further, the traction effect is realized, the direction rod assembly 10 is further electrically connected with the controller, thereby realizing the control of the first wheel 1036 through the direction rod assembly 10, realizing the independent running of the electric traction head, and realizing the traction of the trailer body 16 after being connected with the vehicle.

It should be noted that the first wheels 1036 may be provided in two to increase power and increase traction.

Further, each of the drawbar assemblies 14 includes: a drawbar 140, a connector 141 and a drawbar socket 15; the connecting piece 141 is rotatably connected with one end of the traction rod 140, one end of the traction seat 15 is rotatably connected with one end of the connecting piece 141 away from the traction rod 140, the traction device 151 is rotatably connected with one end of the traction seat 15 away from the connecting piece 141, and one end of the traction rod 140 away from the connecting piece 141 is rotatably connected with the adapting sleeve 110;

specifically, each drawbar assembly 14 includes: one end of the traction rod 140 is rotationally connected with the adapting sleeve 110, one end of the traction rod 140 can rotate relative to the adapting sleeve 110 in the horizontal direction, one end of the traction rod 140, which is far away from the adapting sleeve 110, is rotationally connected with the connecting piece 141, the connecting piece 141 is used for playing a role in adapting, the traction rod 140 is connected with the traction seat 15 through the connecting piece 141, the traction rod 140 can be prevented from being directly connected with the traction seat 15 through the arrangement of the connecting piece 141, the traction rod 140 can rotate relative to the connecting piece 141 in the horizontal direction, one end of the connecting piece 141, which is far away from the traction rod 140, is rotationally connected with the traction seat 15 in the horizontal direction, the traction seat 15 can rotate relative to the traction seat 15 in the vertical direction, so that the traction rod 140 can be in an included angle shape through the connecting piece 141 and the traction seat 15 in the vertical direction, a folding effect is achieved, the traction device 151 is arranged on the upper part of one end of the traction seat 15, which is far away from the connecting piece 141, and the traction device 151 is rotationally connected with the traction seat 15, when the traction device 151 is connected with the external trailer 16, the traction seat 16 can be prevented from rotating relative to the traction seat 15 in a certain angle, the traction device 151 can be prevented from being continuously stressed by the traction device 151 relative to the electric trailer 16 when the electric trailer is not running in a certain angle.

Further, a limiting structure (not shown) is disposed in the adaptor sleeve 110 and is matched with the two traction rods 140, so as to facilitate the two traction rods 140 to rotate synchronously; specifically, because the traction rods 140 are rotationally connected with the adapting sleeve 110, in order to avoid that the angles of the two traction rods 140 relative to the adapting sleeve 110 are different and the two traction rods 140 are easily affected by external force to freely move relative to the adapting sleeve 110, and normal use is affected, a limiting structure (not shown in the figure) matched with the traction rods 140 is arranged in the adapting sleeve 110, and is used for limiting the free rotation of the two traction rods 140 and enabling the two traction rods 140 to synchronously rotate, namely, when one traction rod rotates, the other traction rod can rotate along with the free rotation, the limiting structure can be realized by adopting the engagement of a gear and a rack, namely, a plurality of teeth distributed in an arc shape are arranged at one end of the traction rods 140, which is rotationally connected with the adapting sleeve 110, a gear is arranged between the two traction rods 140 in the adapting sleeve 110, the outer side of the gear is meshed with the teeth of the two traction rods 140, so that when one traction rod 140 rotates, the other traction rod 140 also rotates, and the two traction rods 140 only mutually draw together or are mutually far away, and simultaneously, when the two traction rods 140 also rotate, the maximum distance between the two traction rods 140 and the largest distance between the two traction rods are required to be separated from the teeth, and the gear can be separated from the hook sleeve 110 in order to realize rotation, and the hook sleeve can be realized by adopting the hook teeth, and the hook sleeve is required to rotate, and the hook sleeve can be rotationally and the hook teeth and the hook sleeve, and the hook sleeve can be rotated; the traction rod 140 is rotatably connected with the adapter sleeve 110, so that the electric traction head can be adjusted according to the width of the trailer body 16, and the electric traction head is not limited to the single-width trailer body 16, and the electric traction head can be adapted to the gathering type trailer body 16 through the rotary connection, so that the application range is wider, and the use cost of a user is lower.

Further, in this embodiment, an end surface and a top surface of the traction seat 15, which are far away from the traction device 151, are open, an end of the connecting piece 141, which is far away from the traction rod 140, is inserted into the traction seat 15 and is vertically rotatably connected with the traction seat 15, a first clamping groove 153 is provided on the end surface of the opening of the traction seat 15, and a second clamping groove 154 is provided on the top surface of the opening of the traction seat 15;

specifically, the end face and the top surface of the end face, which are connected with the traction base 15 and the traction rod 140, of the traction rod 140 are opened, one end of the traction rod 140 is inserted into the traction base 15 through the opening and is connected with the traction base 15 in a rotating way, and the traction rod 140 can rotate vertically relative to the traction base 15 due to the opening of the top surface of the traction base 15, and the bottom surface of the traction base 15 is closed, so that the traction rod 140 cannot rotate continuously after rotating vertically for a certain angle, and limited by the traction base 15, the structure can effectively avoid the arch between the traction base 15 and the traction rod 140, meanwhile, the two sides of the end face of the opening of the traction base 15 are respectively provided with a first clamping groove 153, the two sides of the top surface of the opening are respectively provided with a second clamping groove 154, and the first clamping groove 153 and the second clamping groove 154 are used for being matched with the connecting piece 141 to fix the connecting piece 141 in different directions.

Further, a connecting shaft 142 is disposed at one end of the connecting member 141 far away from the traction rod 140, one end of the connecting member 141 provided with the connecting shaft 142 is inserted into the traction seat 15 and is rotationally connected with the traction seat 15 through the connecting shaft 142, a displacement sliding hole 143 is formed in the middle of the connecting member 141, a first clamping pin 144 is disposed in the displacement sliding hole 143, two second tension springs 145 are connected between the first clamping pin 144 and the connecting shaft 142, the first clamping pin 144 is matched with the first clamping groove 153 and the second clamping groove 154, and two opposite surfaces of the two connecting members 141 are inclined in opposite directions by a predetermined angle;

specifically, the end of the connecting piece 141 far away from the traction rod 140 is provided with the connecting shaft 142, the end of the connecting piece 141 provided with the connecting shaft 142 is inserted into the traction seat 15 and is rotationally connected with the traction seat 15 through the connecting shaft 142, so that the traction rod 140 can vertically rotate relative to the traction seat 15, a displacement sliding hole 143 is further formed in the middle of the connecting piece 141, a first clamping pin 144 is arranged in the displacement sliding hole 143, the first clamping pin 144 can slide in the displacement sliding hole 143, the first clamping pin 144 is matched with the first clamping groove 153 and the second clamping groove 154, in order to enable the first clamping pin 144 to be matched with the first clamping groove 153 or the second clamping groove 154 to achieve limiting, two second tension springs 145 are further arranged between the first clamping pin 144 and the connecting shaft 142, and the first clamping pin 144 always moves towards the direction of the connecting shaft 142 through the tension of the two second tension springs 145, and the first clamping pin 144 is located on the outer side of the traction seat 15 due to the fact that the first clamping groove 153 and the second clamping groove 154 are located in the traction seat 15, and the connecting shaft 142 is located in the traction seat 15, and therefore the first clamping pin 144 can be matched with the first clamping groove 153 or the second clamping groove 154 after being located correspondingly.

It should be noted that a foot brake 146 is further provided on one of the traction rods 140, and a brake device such as a disc brake or drum brake is provided on the first wheel 1036 and/or the second wheel 152 and is connected to the foot brake 146, so as to achieve brake control of the first wheel 1036 and/or the second wheel 152.

Further, the steering rod assembly 10 includes: the utility model provides a loop bar 103, direction pole 101, the direction pole 101 is flexible to be located in the loop bar 103, just the direction pole 101 with be equipped with a restriction between the loop bar 103 direction pole 101 axial activity and radial pivoted joint device, the top of direction pole 101 still is connected with handle ring 102, handle ring 102 passes through the direction pole 101 drives loop bar 103 rotates, joint device includes: a telescopic bayonet 1031 provided at the top of the loop bar 103, and a telescopic bayonet 1011 provided on the side wall of the steering bar 101 to be matched with the telescopic bayonet 1031; the inner wall of the sleeve rod 103 is provided with a protruding rotation limiting protrusion 1035, and the outer side wall of the steering rod 101 is provided with a rotation limiting groove 1013 matched with the rotation limiting protrusion 1035;

specifically, the steering rod 101 can slide in the loop bar 103 in a telescopic manner to adjust the use height of the steering rod 101, meanwhile, a clamping device for limiting the axial movement and the radial movement of the steering rod 101 relative to the loop bar 103 is further arranged between the loop bar 103 and the steering rod 101, so that the steering rod 101 can drive the loop bar 103 to rotate horizontally, the first wheel 1036 is fixedly or detachably connected with the bottom end of the loop bar 103, in the embodiment, the first wheel 1036 can be synchronously driven by the steering rod 101, meanwhile, a handle ring 102 is connected to the top of the steering rod 101, the handle ring 102 is hollow, a user can conveniently put the hand into the handle ring 102 when the user needs to drag, and the handle ring 102 can drive the steering rod 101 and the loop bar 103 to rotate relative to the switching sleeve 110 so as to control the orientation of the first wheel 1036;

To avoid random movement of the steering rod 101 within the loop bar 103, a clamping device is provided between the loop bar 103 and the steering rod 101, the clamping device comprising: the telescopic clamping pin 1031 is arranged at the top of the loop bar 103, the plurality of telescopic clamping holes 1011 are formed in the side wall of the steering rod 101 along the length direction, the plurality of telescopic clamping holes 1011 are arranged at intervals, and on the same straight line, the position of the steering rod 101 relative to the loop bar 103 is fixed through the cooperation of the telescopic clamping pin 1031 and the telescopic clamping holes 1011, wherein the telescopic clamping pin 1031 is internally provided with a spring, the head part of the telescopic clamping pin 1031 is ejected into the telescopic clamping holes 1011 under the action force of the spring, the limit is realized, and if the limit is required to be released, the tail part of the telescopic clamping pin 1031 can be pulled to enable the head part of the telescopic clamping pin 1031 to be separated from the telescopic clamping holes 1011;

in order to further improve the degree of fit between the steering rod 101 and the loop bar 103, a rotation limiting protrusion 1035 with a preset length is arranged on the inner wall of the top end of the loop bar 103, meanwhile, a rotation limiting groove 1013 arranged along the length of the steering rod 101 is arranged on the outer side wall of the steering rod 101, the rotation limiting groove 1013 is matched with the rotation limiting protrusion 1035, the synchronism between the steering rod 101 and the loop bar 103 is ensured through the concave-convex fit between the rotation limiting protrusion 1035 and the rotation limiting groove 1013, meanwhile, the arrangement of the rotation limiting protrusion 1035 and the rotation limiting groove 1013 can also avoid the rotation of the steering rod 101 relative to the loop bar 103 after the telescopic bayonet 1031 and the rotation limiting hole 1012 lose fit;

Further, a mounting hole is formed in the bottom of the handle ring 102, the top end of the steering rod 101 is inserted into the mounting hole in the bottom of the handle ring 102, a plurality of rotation limiting holes 1012 are formed in the side wall of the top end of the steering rod 101 along the circumference, rotation limiting bayonet lock 1021 matched with the rotation limiting holes 1012 is formed in the side wall of the mounting hole in the bottom of the handle ring 102, folding grooves 1022 are formed in two sides of the handle ring 102 respectively, a holding rod 1023 is rotatably connected to the same ends of the two folding grooves 1022, a limiting device 1024 is further arranged at one end of the holding rod 1023 connected with the folding grooves 1022, and is used for limiting when the holding rod 1023 is stored in the folding grooves 1022 or when the holding rod 1023 is horizontal relative to the handle ring 102, a plurality of control keys 1025 are further arranged on the handle ring 102, and a plurality of control keys 1025 are connected with integrated wires 1026;

specifically, in order to facilitate the rotation of the first wheel 1036 and the rotation of the handle ring 102 without the rotation of the handle ring 102 under different use demands, the handle ring 102 can change the angle relative to the direction rod 101, a mounting hole (not shown in the figure) is formed in the middle of the bottom surface of the handle ring 102, the top end of the direction rod 101 is inserted into the mounting hole, the connecting piece 141 such as a bearing is tightly matched with the inner side wall of the mounting hole, the bearing can also be used for preventing the handle ring 102 from separating from the direction rod 101 after the limit of the rotation limiting bayonet lock 1021 is lost, and simultaneously the handle ring 102 can rotate freely relative to the direction rod 101, wherein the handle ring 102 can rotate freely relative to the direction rod 101, the rotation limiting bayonet lock 1021 is arranged on the bottom side wall of the handle ring 102, a plurality of rotation limiting holes 1012 are formed in the top of the direction rod 101, the rotation limiting bayonet lock 1021 is matched with the rotation limiting holes 1012 to realize the fixation of the handle ring 102, and the rotation of the direction rod 101 is driven by the rotation limiting bayonet lock 1021 and the rotation limiting bayonet lock 1012 is matched with the rotation limiting holes 1012, and the rotation of the rotation limiting bayonet lock 101 can not be satisfied in the same direction rod 1031.

The shape of the handle ring 102 includes, but is not limited to, triangle, rectangle, ellipse, circle or other polygons, in this application, the rationality of the structure is preferably inverted trapezoid, folding grooves 1022 are respectively provided at two sides of the handle ring 102, a holding rod 1023 is rotatably connected in one end of the folding groove 1022 through a rotation shaft, the holding rod 1023 can be rotatably stored in the folding groove 1022 when not in use, wherein, in order to enable the holding rod 1023 to be normally used when in use, a limiting device 1024 is further provided at one end of the folding groove 1022 connected with the holding rod 1023, in this application, the limiting device 1024 is preferably a bayonet lock with a spring, which has a simple structure, convenient installation and low cost, the limiting device 1024 can be other limiting structures with or without rebound function, such as a bayonet lock structure, a gear structure, etc., and holes adapted to the limiting device 1024 are provided at positions corresponding to the holding rod 1023 when in a folding state or an unfolding state, so that the holding rod 1023 can be normally used when in an unfolding state or a folding state, the limiting device 1024 can be fixed to ensure that the holding rod 1023 is in a folding state, and the pulling rod 1027 is normally oriented to the direction of the handle ring 102, and the information display screen 102 is provided at a normal speed, and the display screen is used for displaying the display speed and the display speed of the display.

In order to facilitate the control of the operation of the first wheel 1036 by the handle ring 102, a plurality of control buttons 1025 are further provided on the handle ring 102, wherein the control buttons 1025 include, but are not limited to, a forward/reverse button, a driving/towing switch button, a trailer power-assisted speed control button, a car light on-off button, a horn button, a steering lamp control button, etc., and the button design of the electric bicycle in the prior art can be specifically referred to, and simultaneously, in order to realize the control of the vehicle speed, a dial or one of the holding rods 1023 is set into a rotating structure, wherein the dial speed control principle is as follows: the electric motor comprises a finger-dialing handle and a finger-dialing position sensor, when the finger-dialing handle is dialed, the finger-dialing position sensor can transmit a finger-dialing position signal to a controller, and the controller adjusts the output power of the electric motor by controlling the output voltage or current of a battery, thereby controlling the speed. The finger-dialing position sensor can be realized by adopting a variable resistor or a Hall sensor and the like, converts the finger-dialing rotation amplitude into an electric signal and sends the electric signal to the controller;

the principle of rotation speed control of the grip 1023 is the same as that of finger dialing. This is a common prior art, and therefore, the structure thereof is not described in detail herein, and reference is made to the electric door handle of the electric bicycle. An integrated conducting wire 1026 is arranged in the steering rod 101, the integrated conducting wire 1026 enters the loop bar 103 from the steering rod 101 and is electrically connected with the first wheel 1036 and the controller from the traction rod 140, wires are prevented from being exposed, the integrated conducting wire 1026 is used for electrically connecting a plurality of control keys 1025, a display screen 1027 and a vehicle speed control structure with an external trailer, the control keys 1025 can also adopt a resistance key mode, the wire core setting of the integrated conducting wire 1026 can be reduced in the mode, the resistance value of each key of the resistance keys is different, the corresponding resistance value can be generated when the corresponding key is pressed, the integrated conducting wire 1026 is used for transmitting the resistance signal to the controller, and the controller receives the resistance signal, recognizes the key function according to the resistance value and performs corresponding control.

Further, the adapter kit 110 includes: a shaft sleeve 11 and a limiting piece 13; the sleeve 11 is movably connected with the sleeve rod 103, the sleeve rod 103 is displaced and/or rotated relative to the sleeve 11, an arc-shaped pin hole 1032 with a predetermined angle is formed in the sleeve rod 103 within the range of the sleeve 11, and a folding bayonet lock 111 is arranged at a position of the sleeve 11 corresponding to the arc-shaped pin hole 1032; the sleeve rod 103 is further provided with a plurality of folding adjustment holes 1033, the folding adjustment holes 1033 are matched with the folding bayonet 111, the sleeve rod 103 is further provided with a rotation limiting sliding groove 1034 which corresponds to and is matched with the folding bayonet 111, one side of the shaft sleeve 11 is further provided with a connecting insert 112 which extends out, the middle part of the top surface of the connecting insert 112 is provided with an insert sliding groove 113, one end side wall of the connecting insert 112, which is far away from the shaft sleeve 11, is provided with an insert rotating shaft 133 hole 114, the side wall of the connecting insert 112 is further provided with a kidney-shaped sliding hole 115 which is arranged at intervals with the insert rotating shaft 133 hole 114, and the lower part of the kidney-shaped sliding hole 115 is provided with a control rotating shaft 123 hole 116; a sleeve shell 131 is arranged on one side of the limiting piece 13, an end face and a bottom face of the sleeve shell 131 are opened, an avoidance groove 132 is formed in the middle of the top face of the sleeve shell 131, an insert rotating shaft 133 is further connected in the sleeve shell 131, the insert rotating shaft 133 is rotationally connected with the insert rotating shaft 133 hole 114, the shaft sleeve 11 rotates relative to the limiting piece 13 through the insert rotating shaft 133, and the traction rod 140 is rotationally connected with one side, far away from the sleeve shell 131, of the limiting piece 13;

Specifically, the sleeve 11 is movably connected with the sleeve 103, the sleeve 103 can axially move relative to the sleeve 11, the sleeve 103 horizontally rotates relative to the sleeve 11 or the sleeve 103 can axially move relative to the sleeve 11 and simultaneously horizontally rotate relative to the sleeve 11, in this embodiment, preferably, the sleeve 103 can axially move relative to the sleeve 11 and simultaneously horizontally rotate relative to the sleeve 11, and the sleeve 103 needs to rotate to drive the first wheel 1036, so that in order to avoid large-angle steering of the first wheel 1036 in the use process, the running is influenced, an arc-shaped pin hole 1032 with an angle of 120-150 degrees is arranged at the bottom of the sleeve 103, the arc-shaped pin hole 1032 is located in the sleeving range of the sleeve 11, and meanwhile, a folding bayonet 111 is arranged at a position corresponding to the arc-shaped pin hole 1032 of the sleeve 11, the folding bayonet 111 has the same structure as the telescopic bayonet 1031, and limits the rotation angle of the sleeve 103 by the cooperation of the folding bayonet 111 and the arc-shaped pin 1032, and simultaneously the folding bayonet 111 can limit the axial movement of the sleeve 103 relative to the sleeve 11;

it should be noted that, to limit the sliding of the sleeve 11 in the direction of the first wheel 1036, a plane bearing (not shown in the drawing) is embedded in the bottom surface of the sleeve 11, so that the plane bearing is spaced from the fork frame of the first wheel 1036, a boss may be disposed at the bottom of the sleeve 103, the diameter of the boss is smaller than that of the plane bearing, the plane bearing is spaced from the fork frame of the first wheel 1036 by the disposition of the boss, and meanwhile, a limit screw (not shown in the drawing) is further disposed on the sleeve 103, and the end of the limit screw is inserted into the sleeve 103 and connected with the fork shaft of the first wheel 1036, so that the first wheel 1036 is detachably fixed on the sleeve 103 and rotates along with the sleeve 103, when the limit screw needs to be taken out, the relative position of the sleeve 11 and the sleeve 103 may be changed, so that the limit screw is exposed, and the limit screw may be removed to take out the first wheel 1036.

Because the sleeve rod 103 can axially move relative to the shaft sleeve 11, in order to avoid the problem that the sleeve rod 103 cannot be fixed and the normal use is influenced, a plurality of folding adjustment holes 1033 are further arranged on the sleeve rod 103, the folding adjustment holes 1033 are matched with folding bayonet locks 111, when the sleeve rod 103 moves to a preset position, the folding bayonet locks 111 can be clamped into the folding adjustment holes 1033, so that the position of the sleeve rod 103 is fixed, and then, because the sleeve rod 103 can rotate relative to the shaft sleeve 11, the sleeve rod 103 can drive the folding adjustment holes 1033 to horizontally rotate, the folding bayonet locks 111 cannot horizontally rotate, in order to avoid the problem that the folding adjustment holes 1033 are difficult to be matched with the folding bayonet locks 111 due to the rotation of the sleeve rod 103, a vertical rotation limiting chute 1034 is further arranged on the sleeve rod 103, and the folding bayonet locks 111 are matched with each other along the rotation limiting chute 1034, so that when the sleeve rod 103 moves, the bayonet locks 111 can be positioned in the rotation limiting chute 1034, and the sleeve rod 103 cannot rotate relative to the shaft sleeve rod 11, and the sleeve rod 103 can be conveniently and quickly matched with the rotation limiting chute 103 even if the rotation limiting chute 103 is separated from the rotation limiting chute 111 along the length of the folding chute 1034;

A connecting insert 112 is arranged on one side of the shaft sleeve 11, the connecting insert 112 and the shaft sleeve 11 are integrally formed, an insert sliding groove 113 arranged along the length direction of the connecting insert 112 is also arranged in the middle of the top surface of the connecting insert 112, an insert rotating shaft 133 hole 114 arranged along the width direction of the connecting insert 112 is formed in the side wall of one end of the connecting insert 112 far away from the shaft sleeve 11, the insert rotating shaft 133 hole 114 penetrates through two sides of the connecting insert 112, a waist-shaped sliding hole 115 is also arranged between the insert rotating shaft 133 hole 114 and the shaft sleeve 11, and a control rotating shaft 123 hole 116 is arranged below the waist-shaped sliding hole 115;

the side, away from the traction rod 140, of the limiting piece 13 is provided with a casing 131 with an end face and an opening in the bottom face, the casing 131 is matched with the connecting insert 112, the connecting insert 112 can be inserted into the casing 131, an insert rotating shaft 133 is arranged in the casing 131, the insert rotating shaft 133 is matched with and rotationally connected with the insert rotating shaft 133 hole 114, the shaft sleeve 11 is matched with the insert rotating shaft 133 through the insert rotating shaft 133 hole 114 to realize vertical rotation relative to the limiting piece 13, so that the steering rod 101 can be driven by the shaft sleeve 11 to realize folding relative to the limiting piece 13, the middle part of the top face of the casing 131 is also provided with an avoidance groove 132, one end, away from the limiting piece 13, of the connection insert 112 is communicated with the end face of the opening of the casing 131, the inside of the casing 131 is also provided with an insert rotating shaft 133, and the connecting insert 112 is rotationally connected with the insert rotating shaft 133 through the insert rotating shaft 133 hole 114 to enable the shaft sleeve 11 to vertically rotate relative to the limiting piece 13;

The limiting piece 13 is opened at one surface facing away from the casing 131, the same ends of the two traction rods 140 are respectively inserted into one surface of the opening of the limiting piece 13 and are in rotary connection with the limiting piece 13, so that the two traction rods 140 can respectively rotate relative to the limiting piece 13, the maximum angle of outward rotation is limited by the side wall of the limiting piece 13, meanwhile, the connecting piece 141 is rotationally connected to one end of the traction rod 140 far away from the limiting piece 13, and in order to enable the traction rod 140 to horizontally rotate a certain angle relative to the connecting piece 141 in the opposite direction, one opposite surfaces of the two connecting pieces 141 are positioned at one end rotationally connected with the traction rod 140 and are respectively inclined at a preset angle, one ends of the two traction rods 140 far away from the connecting piece 141 can be mutually close or mutually far away, a triangular structure is formed when the two traction rods are mutually close, the stability is stronger, and if the two traction rods are mutually far away, a rectangular structure or a regular trapezoid structure is formed, and the two traction rods are preferably triangular structure in the application to ensure stability; wherein the limiting structure is arranged in the limiting piece 13.

It should be noted that, the opposite sides of the two connecting members 141 may also be provided with openings to enable the two traction rods 140 to rotate in opposite directions.

Further, in this embodiment, the shaft sleeve 11 is further rotatably connected to a folding control handle 12, and the folding control handle 12 includes: a shank 121, a stem 122; the rod 122 is fixedly connected with the handle 121, a control rotating shaft 123 is arranged at one end of the rod 122 far away from the handle 121, the control rotating shaft 123 is in fit and rotation connection with the control rotating shaft 123 hole 116, a rotating shaft sliding hole 124 is further arranged at one end of the rod 122 provided with the control rotating shaft 123, a second bayonet lock 125 is movably arranged in the rotating shaft sliding hole 124, the rod 122 is positioned in the insert sliding groove 113 and the avoiding groove 132, two ends of the second bayonet lock 125 are respectively positioned in the kidney-shaped sliding hole 115, and the handle 121 drives the second bayonet lock 125 to move in the rotating shaft sliding hole 124 and the kidney-shaped sliding hole 115 when rotating around the control rotating shaft 123; the two sides of the open end face of the sleeve 131 are respectively provided with a first U-shaped hole 134, the two sides of the open bottom face of the sleeve 131 are respectively provided with a second U-shaped hole 135, and the second bayonet 125 is clamped into the corresponding first U-shaped hole 134 or the second U-shaped hole 135 when the shaft sleeve 11 rotates relative to the limiting part 13;

In order to realize the fixation of the shaft sleeve 11 relative to the limiting piece 13 and improve the stability of use, a folding control handle 12 is rotatably connected to the shaft sleeve 11, and the folding control handle 12 comprises: the handle 121 is convenient for a user to stir, the handle 122 is used for being rotationally connected with the connecting plug 112, the handle 121 and the handle 122 are integrally formed, one end of the handle 122, which is far away from the handle 121, is connected with a control rotating shaft 123, the control rotating shaft 123 is matched with the control rotating shaft 123 hole 116 and is rotationally connected, the handle 122 can rotate on the connecting plug 112, the handle 122 is positioned in the plug chute 113 and the avoiding groove 132, a rotating shaft sliding hole 124 is further arranged between the control rotating shaft 123 of the handle 122 and the handle 121, a second bayonet lock 125 is arranged in the rotating shaft sliding hole 124, the second bayonet lock 125 can slide in the rotating shaft sliding hole 124, two ends of the second bayonet lock 125 penetrate into the kidney-shaped sliding hole 115, and the second bayonet lock 125 can only translate and can not move up and down due to the arc motion track of the handle 122;

In order to form a fit with the second bayonet 125, to realize the angle fixation of the shaft sleeve 11 relative to the limiting piece 13, the two sides of the end face of the opening of the sleeve 131 are respectively provided with a first U-shaped hole 134, and the two sides of the bottom face of the opening of the sleeve 131 are respectively provided with a second U-shaped hole 135, when the connection plug 112 and the limiting piece 13 are positioned at a first angle, the second bayonet 125 is clamped into the first U-shaped hole 134, limiting is realized, when the limiting needs to be released, the handle 121 can be shifted to drive the second bayonet 125 to separate from the first U-shaped hole 134, at this time, the shaft sleeve 11 can rotate relative to the limiting piece 13, when the shaft sleeve 11 is positioned at a second angle relative to the limiting piece 13, the second bayonet 125 can be clamped into the second U-shaped hole 135, and the limiting on the second angle is realized.

Further, a first tension spring 117 is fixedly connected to the bottom surface of the connection plug 112, and one end, far away from the connection plug 112, of the first tension spring 117 is fixedly connected with one end, provided with the control rotating shaft 123, of the rod portion 122; the second bayonet lock 125 is connected with two linkage lines, one ends of the two linkage lines, which are far away from the second bayonet lock 125, are respectively connected with the two first bayonet locks 144, so that when the second bayonet lock 125 is driven to move by the folding control handle 12, the second bayonet lock 125 is linked with the first bayonet locks 144 through the linkage lines;

Specifically, in order to realize the automatic matching between the second bayonet 125 and the first U-shaped hole 134 and the second U-shaped hole 135, a first tension spring 117 is fixedly connected to the bottom surface of the connecting plug 112, and one end of the first tension spring 117, which is far away from the connecting plug 112, is fixedly connected to one end of the rod 122, which is provided with a control shaft 123, wherein, as force is required to act on the second bayonet 125 all the time, and the second bayonet 125 moves in a direction far away from the shaft sleeve 11, the connection position between the first tension spring 117 and the rod 122 is required to be on one surface of the rod 122, which is far away from the shaft sleeve 11, so that the rod 122 pushes the second bayonet 125 to move in a direction far away from the shaft sleeve 11 under the pulling of the first tension spring 117, and then the corresponding first U-shaped hole 134 or the second U-shaped hole 135 can be automatically clamped when the shaft sleeve 11 and the limiting member 13 are at a first angle or a second angle.

It should be noted that the first tension spring 117 may also be disposed between the handle 121 and the limiting member 13, and specifically, if the handle 121 is required to incline in the direction of the support rod, so that the second bayonet 125 moves in the direction of the support rod, the first tension spring 117 may also be disposed between the handle 121 and the limiting member 13.

The second embodiment is different from the first embodiment in that the sleeve 11 is fixedly connected with the sleeve rod 103 of the steering rod assembly 10, the sleeve 11 is located at the middle position of the sleeve rod 103, and the interval radian between the first U-shaped hole 134 and the second U-shaped hole 135 is smaller than 90 °, so that when the second bayonet 125 is matched with the first U-shaped hole 134, the limiting member 13 forms an included angle with the connecting insert 112 of the sleeve 11, that is, the limiting member 13 forms an inclination with respect to the connecting insert 112, and the traction rod 140 also forms an inclination with respect to the traction seat 15, and meanwhile, the interval angle between the first bayonet 153 and the second bayonet 154 is smaller than 90 ° so as to fix the connecting member 141 in this state.

Further, in the present embodiment, a seat device (not shown in the drawings) is rotatably connected to the upper portion of the adapter sleeve 110;

specifically, because the traction rod 140 is obliquely arranged, the electric traction head cannot ride, in this embodiment, the seat device is rotationally connected to the upper portion of the shaft sleeve 11, the stay rod is rotationally connected to the bottom surface of the seat device, meanwhile, a through hole is formed in the limiting piece 13, when the seat device needs to be used, the support to the seat device is realized through the insertion of the stay rod and the limiting piece 13, and when the seat device is not used, the stay rod can be directly pulled out.

In this way, the loop bar 103 does not need to slide in the axial direction relative to the sleeve 11 during the folding process, and the folding adjustment hole 1033 does not need to be provided on the loop bar 103.

Another aspect of the present utility model provides a trailer, comprising a vehicle body 16, an electric traction head according to any one of the foregoing embodiments, wherein the electric traction head is detachably connected to one end of the vehicle body 16 through a traction device 151, and at least one end of the vehicle body 16 is provided with a third wheel;

specifically, because the traction rod 140 can adjust the spacing distance, the vehicle body 16 can be a common gathering type vehicle body 16 in the market, or a folding type vehicle body 16 or a vehicle body 16 which cannot be folded, and because the vehicle body 16 is provided with a vertical supporting rod and wheels which need to be inserted, the traction device 151 can be inserted into a through hole of the vehicle body 16, which is inserted into the wheels, or can be detachably connected with the supporting rod, so as to realize the adaptation, in the embodiment, because the traction device 151 is provided with the first wheels 1036 and the second wheels 152, one end of the vehicle body 16 only needs to be provided with a third wheel, and the vehicle body 16 can be driven by an electric traction head, so as to realize the traction walking;

It should be noted that, the bottom of the end of the vehicle body 16 connected to the traction device 151 needs to be spaced from the traction seat 15, and since the vehicle body 16 and the wheels carried by the vehicle body are usually fixed by screws, the traction device 151 and the vehicle body 16 can be fixed by screws, and only a screw hole needs to be formed in the traction device 151.

Because the electric traction head of the first embodiment does not have a seat device, in order to improve the experience of use, when the electric traction head is combined with the trailer on the basis of the first embodiment, the seat plate can be placed above one end, connected with the electric traction head, of the trailer, so that a person can sit on the seat plate when the electric traction head is used.

The electric traction head is matched with the automobile body, as shown in fig. 11, if the electric traction head is required to be folded in the state, the handle 121 can be stirred, the rod 122 is driven to rotate around the control rotating shaft 123, the rod 122 drives the second bayonet lock 125 to move so as to be separated from the first U-shaped hole 134, meanwhile, the second bayonet lock 125 drives the first bayonet lock 144 to be separated from the first bayonet groove 153 through the linkage line, at the moment, the shaft sleeve 11 can be rotated vertically relative to the limiting piece 13 due to the fact that the limit of the second bayonet lock 125 is lost between the shaft sleeve 11 and the limiting piece 13, the shaft sleeve 11 drives the sleeve rod 103 to rotate so as to enable the sleeve rod 103 to be positioned below the limiting piece 13, at the moment, the first wheel 1036 can interfere with the limiting piece 13 and can not enable the sleeve rod 103 to be parallel to the traction rod 140, namely not rotate in place, under the condition that the second bayonet lock 125 is also in a dislocation state with the second U-shaped hole 135, to avoid this, the folding latch 111 may be pulled to disengage from the arc-shaped pin hole 1032, and then a force is applied to the lever 103 to move relative to the sleeve 11, driving the first wheel 1036 away from the limiting member 13, after the interference between the first wheel 1036 and the limiting member 13 is lost, the lever 103 may be in a parallel state with the traction rod 140, after the lever 103 rotates in place, the second latch 125 may correspond to the second U-shaped hole 135, if the handle 121 is released, the second latch 125 may be automatically snapped into the second U-shaped hole 135 under the force of the first tension spring 117 to form a fit, so as to fix the lever 103 in this state, and at the same time, since the first latch 144 is disengaged from the first latch groove 153, after the limitation of the first latch 144 is lost, the traction rod 140 may rotate relative to the traction seat 15 via the connecting member 141 and be in an inclined state, the state is a dragging state, so that dragging is facilitated, and in the state, the first wheel 1036 can be controlled to run at a preset speed by toggling the dragging assisting speed control key in the control key 1025, so that an assisting effect is achieved. It should be noted that, in this state, in order to promote the labor-saving property of towing, the position of the sleeve 11 relative to the sleeve 103 may be located at the middle part of the sleeve 103, in this position, the situation that the gravity center of the steering rod assembly 10 is biased to the rear due to the bias of the first wheel 1036, so as to cause more effort to towing may be avoided, and the fixation of the sleeve 103 may be realized by the cooperation of the folding bayonet 111 and the folding adjustment hole 1033 located at the middle part of the sleeve 103, and meanwhile, the steering rod 101 may be pulled out according to the use requirement, so as to extend the length, and facilitate towing.

In the towing state, the towing rod 140 continues to rotate towards the direction of the vehicle body 16 until the towing rod 140 and the towing seat 15 are vertical, at this time, the first clamping pin 144 corresponds to the second clamping groove 154, the first clamping pin 144 is clamped into the second clamping groove 154 by itself under the action force of the second tension spring 145 to realize limit, at this time, the towing rod 140 cannot rotate relative to the towing seat 15, then the sleeve rod 103 slides relative to the shaft sleeve 11 to move downwards, so that the first wheel 1036 lands and completes folding, if the vehicle body 16 has the folding function, such as gathering the vehicle body 16, at this time, the vehicle body 16 can gather the vehicle body 16, the vehicle body 16 drives the two towing seats 15 to close to each other, the towing seat 15 drives the towing rod 140 to rotate relative to the limiting piece 13 and close to each other until the vehicle body 16 is completely folded, thereby realizing the effect of adapting the vehicle body 16; in the case of the two-fold type vehicle body 16, the two-fold type vehicle body 16 does not need to be folded in the width direction of the vehicle body 16, and therefore only the traction lever 140 and the traction seat 15 need to be in a vertical state.

In summary, according to the present utility model, the tail end of the traction rod 140 is connected with the traction seat 15, and the traction device 151 is disposed on the traction seat 15, so that the electric traction head can be adapted to other vehicle bodies 16, and the traction rod 140 is rotatably connected with the adapting sleeve 110, so that the electric traction head can be adapted to vehicle bodies 16 with different sizes and different types of vehicle bodies 16, the practicality is further improved, and the steering rod assembly 10 is folded through the adapting sleeve 110, so that the occupied space is reduced, and meanwhile, the electric traction head can be driven by itself, so that the use of the electric traction head is richer, and the use requirements of various scenes are satisfied.

The present utility model is not limited to the details and embodiments described herein, and thus additional advantages and modifications may readily be made by those skilled in the art, without departing from the spirit and scope of the general concepts defined in the claims and the equivalents thereof, and the utility model is not limited to the specific details, representative apparatus and illustrative examples shown and described herein.

Claims (13)

1. An electric traction head, comprising: the steering rod assembly, the bottom of steering rod assembly is connected with first wheel, the steering rod assembly is connected with the switching external member, the switching external member is connected with two at least traction lever assemblies, every the traction lever assembly keeps away from the one end of switching external member all is connected with draw gear, every the traction lever assembly keeps away from the one end of switching external member all is connected with the second wheel, first wheel and/or the second wheel is used for the drive the traction lever assembly walks, be equipped with on the traction lever assembly and be used for giving first wheel and/or the power of second wheel power supply and be used for controlling first wheel and/or the controller of second wheel walking, the steering rod assembly with the controller electricity is connected.

2. The motorized traction head of claim 1, wherein each of the traction rod assemblies comprises: a traction rod, a connecting piece and a traction seat; the connecting piece with the one end of traction lever rotates to be connected, the one end of traction seat with the connecting piece is kept away from the one end of traction lever rotates to be connected, draw gear with the traction seat is kept away from the one end of connecting piece rotates to be connected, the traction lever keep away from with the one end of connecting piece with the switching external member rotates to be connected.

3. The electric traction head according to claim 2, wherein a limiting structure matched with the two traction rods is arranged in the switching sleeve, and is used for promoting the two traction rods to rotate synchronously.

4. The electric traction head according to claim 2, wherein the end face and the top face of the traction seat far away from the traction device are open, the end of the connecting piece far away from the traction rod is inserted into the traction seat and vertically and rotatably connected with the traction seat, the end face of the traction seat opening is provided with a first clamping groove, and the top face of the traction seat opening is provided with a second clamping groove.

5. The electric traction head according to claim 4, wherein a connecting shaft is arranged at one end of the connecting piece far away from the traction rod, one end of the connecting piece provided with the connecting shaft is inserted into the traction seat and is rotationally connected with the traction seat through the connecting shaft, a displacement sliding hole is formed in the middle of the connecting piece, a first clamping pin is arranged in the displacement sliding hole, two second tension springs are connected between the first clamping pin and the connecting shaft, the first clamping pin is matched with the first clamping groove and the second clamping groove, and two opposite surfaces of the connecting piece incline to opposite directions by a preset angle.

6. The electric traction head of claim 1 wherein the steering rod assembly comprises: loop bar, steering yoke, the steering yoke is flexible to be located in the loop bar, just the steering yoke with be equipped with a restriction between the loop bar steering yoke axial activity and radial pivoted joint device, the top of steering yoke still is connected with the handle ring, the handle ring passes through the steering yoke drives the loop bar rotates, joint device includes: 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; the inner wall of the loop bar is provided with a convex rotation limiting lug, and the outer side wall of the steering bar is provided with a rotation limiting groove matched with the rotation limiting lug.

7. The electric traction head according to claim 6, 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 plurality of rotation limiting holes are formed in the side wall of the top end of the steering rod along the circumference, rotation limiting bayonet locks matched with the rotation limiting holes are arranged on the side wall of the mounting hole in the bottom of the handle ring, folding grooves are formed in two sides of the handle ring respectively, a holding rod is rotatably connected to the same ends of the two folding grooves, a limiting device is further arranged at one end of the holding rod connected with the folding grooves, the limiting device 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, a plurality of control keys are further arranged on the handle ring, and a plurality of control keys are connected with an integrated wire.

8. The motorized traction head of claim 6, wherein the adapter kit comprises: shaft sleeve and limiting piece; 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 preset angle is formed in the range of the sleeve rod, and a folding bayonet lock is arranged at the position, corresponding to the arc-shaped pin hole, of the sleeve rod; the sleeve rod is also provided with a plurality of folding adjusting holes which are matched with the folding bayonet locks, the sleeve rod is also provided with a rotation limiting chute which corresponds to and is matched with the folding bayonet locks, one side of the shaft sleeve is also provided with a connecting plug block which extends out, the middle part of the top surface of the connecting plug block is provided with a plug block chute, one end side wall of the connecting plug block, which is far away from the shaft sleeve, is provided with a plug block rotating shaft hole, the side wall of the connecting plug block is also provided with a waist-shaped sliding hole which is arranged at intervals with the plug block rotating shaft hole, and the lower part of the waist-shaped sliding hole is provided with a control rotating shaft hole; one side of locating part is equipped with the cover shell, terminal surface and the bottom surface opening of cover shell, dodge the groove has been seted up in the middle of the top surface of cover shell, still be connected with the inserted block pivot in the cover shell, the inserted block pivot with the inserted block pivot hole rotates to be connected, the axle sleeve passes through the inserted block pivot is relative the locating part rotates, the traction lever with the locating part is kept away from one side of cover shell rotates to be connected.

9. The electric traction head of claim 8 wherein the sleeve is further rotatably coupled with a folding lever, the folding lever comprising: a handle portion, a stem portion; the rod part is fixedly connected with the handle part, one end of the rod part, which is far away from the handle part, is provided with a control rotating shaft, the control rotating shaft is in fit and rotary connection with the control rotating shaft hole, one end of the rod part, which is provided with the control rotating shaft, is also provided with a rotating shaft sliding hole, a second bayonet lock is movably arranged in the rotating shaft sliding hole, the rod part is positioned in the inserting block sliding groove and the avoiding groove, two ends of the second bayonet lock are respectively positioned in the kidney-shaped sliding hole, and the handle part drives the second bayonet lock to move in the rotating shaft sliding hole and the kidney-shaped sliding hole when rotating around the control rotating shaft; the sleeve is characterized in that first U-shaped holes are respectively formed in two sides of the end face of the sleeve opening, second U-shaped holes are respectively formed in two sides of the bottom face of the sleeve opening, and the second clamping pin is clamped into the corresponding first U-shaped holes or the second U-shaped holes when the shaft sleeve rotates relative to the limiting piece.

10. The electric traction head according to claim 9, wherein the bottom surface of the connecting plug is fixedly connected with a first tension spring, and one end of the first tension spring, which is far away from the connecting plug and is connected with one end of the rod part, which is provided with the control rotating shaft, is fixedly connected with the rod part; the second bayonet lock is connected with two linkage lines, two the linkage line keep away from the one end of second bayonet lock is connected with two first bayonet locks respectively, makes the second bayonet lock by when folding control handle drives the displacement, the second bayonet lock passes through the linkage line is linked with first bayonet lock.

11. The motorized traction head of claim 1, wherein the adapter kit comprises: shaft sleeve and limiting piece; the shaft sleeve is fixedly connected with the steering rod assembly, the shaft sleeve is positioned in the middle of the steering rod assembly, the steering rod assembly rotates relative to the shaft sleeve, an arc-shaped pin hole with a preset angle is formed in the range of the shaft sleeve, and a folding bayonet lock is arranged at the position, corresponding to the arc-shaped pin hole, of the shaft sleeve; one side of the shaft sleeve is also provided with an extended connecting plug, the middle part of the top surface of the connecting plug is provided with a plug chute, one end side wall of the connecting plug, which is far away from the shaft sleeve, is provided with a plug rotating shaft hole, the side wall of the connecting plug is also provided with waist-shaped sliding holes which are arranged at intervals with the plug rotating shaft holes, and a control rotating shaft hole is arranged below the waist-shaped sliding holes; one side of locating part is equipped with the cover shell, terminal surface and the bottom surface opening of cover shell, dodge the groove has been seted up in the middle of the top surface of cover shell, still be connected with the inserted block pivot in the cover shell, the inserted block pivot with the inserted block pivot hole rotates to be connected, the axle sleeve passes through the inserted block pivot is relative the locating part rotates, the traction lever with the locating part is kept away from one side of cover shell rotates to be connected.

12. The electric traction head of claim 11 wherein the upper portion of the adapter sleeve is rotatably coupled with a seating device.

13. A trailer comprising a body, an electric traction head as claimed in any one of claims 1 to 12, the electric traction head being detachably connected to one end of the body by traction means, at least one end of the body being provided with a third wheel.