CN211685454U - Two-wheeled vehicle capable of being dragged and carried after being folded - Google Patents

Abstract

The utility model discloses a two-wheeled vehicle which can be towed and travelled after being folded. The utility model comprises a main frame, a sub-frame fixedly connected with the main frame, and a sub-frame mounted on the front end of the main frame. A front wheel fork assembly, a rear wheel fork assembly mounted on the rear end of the main frame, the front wheel fork assembly comprising a front wheel fork and a front wheel rotatably connected to the front wheel fork, the front wheel fork The utility model includes a rotatable and lockable front bushing with the main frame, and a handlebar fixedly connected with the front bushing. The utility model forms a storage space for accommodating the front wheel fork assembly on the main frame. A storage space for storing rear wheels is formed between the frame and the sub-frame, which greatly saves the folding space of a two-wheeled vehicle that can be towed and carried on its back after being folded.

Description

Two-wheeled vehicle that can be towed and transported after being folded

technical field

The utility model relates to a two-wheeled vehicle which can be towed and carried on its back after being folded.

Background technique

Two-wheeled vehicles that can be towed and carried on their backs after being folded are widely used in cities because of their flexibility, which can effectively avoid the problem of traffic jams. The two-wheeled vehicle has put forward higher requirements, and how to make the two-wheeled vehicle that can be towed and carried on the back can be folded to achieve portability is an urgent problem to be solved at present.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a foldable two-wheeled vehicle that can be towed and carried on its back after being folded and takes up less space after being folded.

In order to achieve the above purpose, the technical scheme adopted by the present utility model is: a two-wheeled vehicle that can be towed and can be driven backwards after being folded, which comprises a main frame, a sub-frame fixedly connected with the main frame, an installation A front wheel fork assembly at the front end of the main frame and a rear wheel fork assembly installed at the rear end of the main frame, the front wheel fork assembly includes a front wheel fork and is rotatably connected to the front wheel fork The front wheel, the front wheel fork includes a front sleeve that is rotatable and lockable with the main frame, a handlebar fixedly connected with the front sleeve, and is sleeved with the front sleeve and can be locked. A front lower fork that rotates coaxially and is relatively locked, the front wheel is rotatably connected to the front lower fork, and the front lower fork and the front sleeve are in unfolded and folded states. When the fork frame and the front sleeve are unfolded at the same time, the front sleeve protrudes toward the front and bottom of the main frame, and the front lower fork frame and the rotation shaft of the front wheel are connected with the front sleeve and the front sleeve. The rotation connecting shafts of the main frame are parallel, and when the front lower fork frame and the front sleeve are folded at the same time, the front sleeve is folded toward the main frame and is parallel to the main frame or forms an acute angle, The rotation axis of the front lower fork frame and the front wheel is perpendicular to or forms an acute angle with the rotation connection axis of the front sleeve and the main frame.

Preferably, the rear wheel fork assembly includes a rear sleeve that is rotatable and lockable with the main frame, and a rear lower fork bracket that is sleeved with the rear sleeve and can be rotated coaxially and locked relative to each other. The rear wheel is rotatably connected to the rear lower fork, and the rear lower fork and the rear sleeve are in unfolded and folded states. When the rear lower fork and the rear sleeve are simultaneously unfolded, the The rear sleeve protrudes toward the rear and bottom of the main frame, and the rotating shaft of the rear lower fork frame and the rear wheel is parallel to the rotation connecting shaft of the rear sleeve and the main frame. When the rear lower fork frame and the rear sleeve are folded at the same time, the rear sleeve is rotated and folded toward the front and upper side of the main frame and is parallel to the main frame or forms an acute angle. The rotation axis of the wheel is perpendicular or at an acute angle to the rotation connecting axis of the rear sleeve and the main frame.

It is optimized that the middle part of the main frame is provided with a first letting slot, when the front lower fork frame and the front sleeve are folded at the same time, the front lower fork frame and the front sleeve and the front wheel is located in the first giving way slot.

Preferably, the front wheel fork includes a front folding locking portion for locking and unlocking the front bushing and the main frame relative to each other, the front bushing is provided with a first slot, and the front folding lock The tightening portion includes a first lock pin slidably connected to the main frame, and is used to make the first lock pin always have a first elastic member that tends to move toward the first slot, and when the first lock pin withdraws When the first clamping slot is used, the front sleeve can be flipped and folded relative to the main frame, and when the first locking pin is inserted into the first clamping slot, the front sleeve can be opposite to the main frame. The main frame is fixed and open.

Preferably, the front wheel fork includes a front rotation locking portion for relatively locking and unlocking the front sleeve and the front lower fork frame, and the front rotation locking portion includes a front rotation locking portion that is fixedly arranged in the front sleeve. The flower shaft sleeve is matched with the flower shaft shaft sleeve and the flower shaft is worn in the flower shaft shaft sleeve, and is installed on the front sleeve for making the flower shaft and the flower shaft A toggle for locking and disengaging the axle sleeve, the flower axle sleeve is fixedly connected with the handlebar, the flower axle is fixedly connected with the front lower fork frame, when the toggle is unlocked, the flower axle is fixedly connected The teeth of the shaft slide out of the tooth slot in the flower shaft sleeve. At this time, the flower shaft is rotatably connected with the flower shaft sleeve. When the trigger is locked, the teeth of the flower shaft are connected to the flower shaft. The tooth grooves in the shaft sleeve are engaged, and the flower shaft is fixedly connected with the flower shaft shaft sleeve.

Preferably, the sub-frame includes a sub-strut with both ends connected to the two ends of the main frame, and a seat cushion assembly mounted on the sub-strut, the seat cushion assembly includes a front end portion and a The front end of the main frame is rotatably connected, and the auxiliary upper strut can be retracted and fixed in length; the two ends are foldable and are respectively connected with the rear end of the main frame and the rear of the auxiliary upper stay. A secondary lower strut whose ends are rotatably connected; a secondary locking part for locking the secondary lower strut when unfolded; a seat cushion and a backrest arranged on the secondary upper strut; the seat cushion assembly has a folding and the unfolded state, when the seat cushion assembly is unfolded, the auxiliary upper stay is extended, the auxiliary lower stay is unfolded and the auxiliary locking portion is in a locked state, when the seat cushion assembly is folded, the auxiliary upper stay The strut is shrunk, and the secondary lower strut is folded and parallel to the secondary strut or the included angle is an acute angle.

Further, the auxiliary upper support rod includes an auxiliary upper outer sleeve, a limit inner pull rod coaxially arranged with the auxiliary upper outer sleeve and fixed in the auxiliary upper outer sleeve, sleeved in the limit inner pull rod and passing through the limit inner pull rod. The telescopic cross-bar beam is arranged in the outer casing of the auxiliary upper part, and the seat cushion and the backrest are installed on the telescopic cross-bar beam.

Further, the auxiliary lower support rod includes a first auxiliary lower folding rod hinged with the telescopic beam beam, a second auxiliary lower folding rod hinged with the auxiliary support rod, and a middle folding locking portion, so The middle folding locking part has two states of locking and unlocking. When the middle folding locking part is locked, the auxiliary lower first folding rod and the auxiliary lower second folding rod are unfolded and locked. When the middle folding lock When the parts are unlocked, the auxiliary lower first folding rod and the auxiliary lower second folding rod can be folded relative to each other.

Further, the rear wheel fork assembly includes a rear-folding locking portion for relatively locking and unlocking the rear sleeve and the main frame, the rear sleeve is provided with a second slot, and the rear foldable The locking portion includes a second lock pin slidably connected to the main frame, and is used to make the second lock pin always have a second elastic member that tends to move toward the second slot. When withdrawing from the second slot, the rear sleeve can be flipped and folded relative to the main frame, and when the second lock pin is inserted into the second slot, the rear sleeve can be folded relative to the main frame. The main frame is fixed and opened.

Further, the rear wheel fork assembly includes a rear rotation locking portion for relatively locking and unlocking the rear sleeve and the rear lower fork bracket, and the rear rotation locking portion includes a rear rotation locking portion fixed on the rear sleeve. The flower shaft sleeve in the tube is matched with the flower shaft shaft sleeve and the flower shaft is inserted in the flower shaft shaft sleeve, and is installed on the rear sleeve for making the flower shaft and the flower shaft A toggle for locking and disengaging the axle sleeve, the flower axle sleeve is fixedly connected with the main frame, the flower axle is fixedly connected with the rear lower fork frame, when the toggle is unlocked, the The teeth of the flower shaft slide out of the tooth slot in the flower shaft sleeve. At this time, the flower shaft and the flower shaft sleeve are rotatably connected. When the trigger button is locked, the teeth of the flower shaft are connected to the The tooth grooves in the flower shaft sleeve are engaged, and the flower shaft is fixedly connected with the flower shaft sleeve.

Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art: the present utility model forms a receiving space for receiving the front wheel fork assembly on the main frame, and four connecting The ends are bent, and the two are spliced to form a hexagon. A storage space for the rear wheels is formed between the main frame and the sub-frame, which greatly saves the folded two-wheeled vehicles that can be towed and backed after being folded. space.

Description of drawings

Accompanying drawing 1 is the schematic diagram of the utility model in the first embodiment;

Figures 2 and 3 are schematic diagrams of the locking and unlocking of the front rotation locking assembly in the first embodiment;

Figures 4 and 5 are the schematic diagrams of the mechanism of the two-wheeled vehicle that can be towed and can be carried on its back after being folded in the first embodiment;

Figures 6 and 7 are respectively a schematic structural diagram of the two-wheeled vehicle that can be towed and carried on its back after being folded and its rear folding locking part in the second embodiment;

Accompanying drawing 8, 11 and 12 are the structural representations of the flower axis and the flower axis bush in embodiment one and two;

9 is a schematic structural diagram of a front wheel fork or a rear wheel fork in Embodiment 3;

FIG. 10 is a schematic structural diagram of the front wheel fork or the rear wheel fork in the fourth embodiment.

Detailed ways

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

As shown in FIG. 1 , the two-wheeled vehicle that can be towed and travelled after being folded includes a main frame 1 , a sub-frame 2 fixedly connected to the main frame 1 , and a front wheel fork mounted on the front end of the main frame 1 . Assembly 3. The rear wheel fork assembly 4 installed on the rear end of the main frame 1. The two-wheeled vehicle can be an electric vehicle or a fuel-powered vehicle.

The front wheel fork assembly 3 includes a front wheel fork 5 and a front wheel 6 rotatably connected to the front wheel fork 5 . The front wheel fork 5 includes a front sleeve 7 that is rotatable and lockable with the main frame 1 , and a front sleeve 7 . The handlebar 8 is fixedly connected, and the front lower fork frame 9 is sleeved with the front sleeve 7 and can be rotated coaxially and relatively locked. The front wheel 6 is rotatably connected to the front lower fork frame 9. The front lower fork frame 9 and The front sleeve 7 has an unfolded and folded state. When the front lower fork 9 and the front sleeve 7 are unfolded at the same time, the front sleeve 7 protrudes toward the front and bottom of the main frame 1, and the front lower fork 9 and the rotation shaft of the front wheel 6 Parallel to the rotation connection axis of the front sleeve 7 and the main frame 1, when the front lower fork 9 and the front sleeve 7 are folded at the same time, the front sleeve 7 is folded towards the main frame 1 and is parallel or formed with the main frame 1. For an acute angle, the rotation axis of the front lower fork 9 and the front wheel 6 is perpendicular to the rotation connection axis of the front sleeve 7 and the main frame 1 or forms an acute angle.

The middle of the main frame 1 is provided with a first give way slot 10. When the front lower fork frame 9 and the front sleeve 7 are folded at the same time, the front lower fork frame 9, the front sleeve 7 and the front wheel 6 are located in the first give way groove. within 10.

The front wheel fork 5 includes a front foldable locking portion 11 for locking and unlocking the front sleeve 7 and the main frame 1 relative to each other. The front sleeve 7 is provided with a first slot 12. The first lock pin 13 on the main frame 1 is used to make the first lock pin 13 always have a first elastic member 14 that has a tendency to move toward the first card slot 12 . When the first lock pin 13 exits the first card slot 12 , the front sleeve 7 can be flipped and folded relative to the main frame 1 , when the first locking pin 13 is inserted into the first slot 12 , the front sleeve 7 is fixed relative to the main frame 1 and is in an open state.

As shown in Fig. 2/3, the front wheel fork 5 includes a front rotary locking portion 15 for locking and unlocking the front sleeve 7 and the front lower fork 9 relative to each other. The flower shaft sleeve 17 in 7 is matched with the flower shaft shaft sleeve 17 and the flower shaft 16 which is worn in the flower shaft shaft sleeve 17, is arranged in the flower shaft shaft sleeve 17 and is fixedly connected with the flower shaft 16. The screw 163, the flower shaft spring 162 arranged between the suspending screw 163 and the flower shaft sleeve 17, one end of the flower shaft spring 162 is fixed on the suspending screw 163 and the other end is fixed with an inner limit ring 165, the inner limit ring 165 abuts against the annular shoulder 172 in the sprocket bushing 17 . The spline spring 162 makes the spline 16 always have a tendency to move toward the spline sleeve 17, and is installed on the front sleeve 7 for locking and disengaging the spline 16 and the spline sleeve 17. The axle sleeve 17 is fixedly connected with the handlebar 8, the flower shaft 16 is fixedly connected with the front lower fork frame 9, as shown in Figure 2/3, the toggle 18 is rotatably connected to the outer side wall of the front sleeve 7, which is rotatably connected There is a push-out plate 181, the lower end of the push-out plate 181 is rotatably connected with a U-shaped connecting plate 182, the flower shaft 16 has a boss 164, and the boss 164 abuts against the circumference of the through hole in the middle of the U-shaped connecting plate 182 and is connected with the front lower fork. The frame 9 is fixedly connected. In order to make the rotation smoother, a plane bearing 91 is connected between the boss 164 and the flat plate in the middle of the U-shaped connecting plate 182. On the other side, the sprocket bushing 17 is located on the other side of the flat plate in the middle of the U-shaped connecting plate 182 . When the trigger 18 is unlocked, it is turned downward, and the push-out plate 181 pushes the U-shaped connecting plate 182 downward until the teeth 161 of the flower shaft 16 slide out of the tooth slot 171 of the flower shaft sleeve 17, and the flower shaft 16 and the flower shaft are at this time. The shaft sleeve 17 is rotatably connected, and when it needs to be locked, the flower shaft 16 moves to the inside and outside of the flower shaft shaft sleeve 1 under the action of the flower shaft spring 162, until the pull button 18 is locked, the tooth 161 of the flower shaft 16 and the flower shaft shaft sleeve 17 The tooth slot 171 of the sprocket is engaged, and the sprocket shaft 16 is fixedly connected with the sprocket shaft sleeve 17 . The teeth of the sprocket 16 can be single teeth or multiple teeth. When the teeth of the sprocket 16 are single teeth, the tooth slot of the sprocket bush 17 is one more tooth than that of the sprocket 16 . The rotation angle of the flower shaft 16 ranges from 0° to 180°, and the rotation angle of the flower shaft is also the rotation angle range of the front lower fork frame and the rear lower fork frame.

The rear wheel fork assembly 4 includes a rear sleeve 19 that is rotatable and lockable with the main frame 1 , a rear lower fork frame 20 that is sleeved with the rear sleeve 19 and can be rotated coaxially and locked relatively, and a rear wheel 41 . The wheel 41 is rotatably connected to the rear lower fork frame 20. The rear lower fork frame 20 and the rear sleeve 19 are in unfolded and folded states. When the rear lower fork frame 20 and the rear sleeve 19 are unfolded at the same time, the rear sleeve 19 faces the main vehicle. The rear and bottom of the frame 1 protrudes, and the rotation axis of the rear lower fork frame 20 and the rear wheel is parallel to the rotation connecting shaft of the rear sleeve 19 and the main frame 1. When the rear lower fork frame 20 and the rear sleeve 19 are folded at the same time, The rear sleeve 19 is rotated and folded toward the front and upper side of the main frame 1 and is parallel to the main frame 1 or forms an acute angle. or an acute angle.

The sub-frame 2 includes a sub-strut 21 whose ends are respectively connected with the two ends of the main frame 1 , a seat cushion assembly 22 mounted on the sub-strut 21 , and the seat cushion assembly 22 includes a front end portion and the front end of the main frame 1 . The auxiliary upper strut 23, which is rotatably connected with each other, and can be retracted and can be fixed in length; the auxiliary upper strut 23, which can be folded and connected with the rear end of the main frame 1 and the rear end of the auxiliary upper strut 23 respectively. The lower stay 24; the auxiliary locking part for locking when the auxiliary lower stay 24 is unfolded; the seat cushion 28 and the backrest 29 arranged on the auxiliary upper stay 23; the seat cushion assembly 22 has a folded and unfolded state, when the seat cushion When the assembly 22 is unfolded, the secondary upper stay 23 is extended, the secondary lower stay 24 is unfolded and the secondary locking part is in a locked state, when the seat cushion assembly 22 is folded, the secondary upper stay 23 is retracted, the secondary lower stay 24 is folded and is in a locked state. The auxiliary struts 21 are parallel or the included angle is an acute angle.

The auxiliary upper support rod 23 includes an auxiliary upper outer sleeve 25, a limit inner pull rod 26 arranged coaxially with the auxiliary upper outer sleeve 25 and fixed in the auxiliary upper outer sleeve 25, sleeved in the limit inner pull rod 26 and penetrated through the limit inner pull rod 26. The telescopic beam 27 , the seat cushion 28 and the backrest 29 in the auxiliary upper outer sleeve 25 are mounted on the telescopic beam 27 .

The auxiliary lower strut 24 includes an auxiliary lower first folding rod 30 hinged with the telescopic beam beam, an auxiliary lower second folding rod 31 hinged with the auxiliary strut 21 and a middle folding locking part 32, the middle folding locking part 32 has There are two states of locking and unlocking. When the folding locking part 32 is locked, the first folding rod 30 and the second folding rod 31 are unfolded and locked. When the folding locking part 32 is unlocked, the first folding rod 30 and the second folding rod 30 and The secondary lower second folding rod 31 can be folded relatively. The middle folding locking part 32 includes a first sliding sleeve 33 fixed with the first folding rod 30 under the auxiliary lower part, a sliding locking pin 35 passing through the first sliding sleeve 33 , and a second sliding sleeve 35 fixedly connected with the second folding rod 31 under the auxiliary lower part. Sliding the sleeve 34, the sliding lock pin 35 has a sliding spring 36 with a sliding tendency towards the second sliding sleeve 34, when the sliding lock pin 35 slides out of the second sliding sleeve 34, the first folding rod 30 and the second folding The rod 31 can be folded relative to each other. When the sliding lock pin 35 is inserted into the second sliding sleeve 34 , the secondary lower first folding rod 30 and the secondary lower second folding rod 31 are unfolded and locked relative to each other.

The rear wheel fork assembly includes a rear folding locking portion for locking and unlocking the rear sleeve 19 and the main frame 1 relative to each other. The rear sleeve 19 is provided with a second slot 42. The rear folding locking portion includes a sliding connection to the main vehicle. The second locking pin 43 on the frame 1 is used for the second elastic member 44 that keeps the second locking pin moving toward the second slot. When the second locking pin exits the second slot, the rear sleeve 19 can When the second locking pin is inserted into the second slot, the rear sleeve 19 is fixed relative to the main frame 1 and is in an open state.

The rear wheel fork assembly includes a rear rotary locking portion 36 for locking and unlocking the rear sleeve 19 and the rear lower fork frame 20 relative to each other. The rear rotary locking portion 36 has the same principle as the front rotary locking portion 15. The flower shaft sleeve 17 in the rear sleeve 19, the flower shaft 16 matched with the flower shaft sleeve 17 and passing through the flower shaft sleeve 17, arranged in the flower shaft sleeve 17 and fixed with the flower shaft 16 The connected suspending screw 163, the flower shaft spring 162 arranged between the suspending screw 163 and the flower shaft sleeve 17, one end of the flower shaft spring 162 is fixed on the suspending screw 163 and the other end is fixed with an inner limit ring 165, The inner limit ring 165 abuts against the annular shoulder 172 in the splined bushing 17 . The spline spring 162 makes the spline 16 always have a tendency to move toward the spline sleeve 17, and is installed on the front sleeve 7 for locking and disengaging the spline 16 and the spline sleeve 17. The axle sleeve 17 is fixedly connected with the handlebar 8, and the flower shaft 16 is fixedly connected with the front lower fork 9. As shown in FIG. Plate 181, the lower end of the push-out plate 181 is rotatably connected with a U-shaped connecting plate 182, the flower shaft 16 has a boss 164, the boss 164 abuts on the circumference of the through hole in the middle of the U-shaped connecting plate 182 and is connected with the front lower fork 9 Fixed connection, in order to make the rotation smoother, a plane bearing 91 is connected between the boss 164 and the flat plate in the middle of the U-shaped connecting plate 182, and the boss 164 and the flat bearing 91 are located on the same side of the flat plate in the middle of the U-shaped connecting plate 182, The flower shaft sleeve 17 is located on the other side of the flat plate in the middle of the U-shaped connecting plate 182 . When the trigger buckle 18 is unlocked, the trigger buckle 18 is turned downward, and the push-out plate 181 pushes the U-shaped connecting plate 182 downward until the teeth 161 of the flower shaft 16 slide out of the tooth slot 171 of the flower shaft sleeve 17. At this time, the flower shaft 16 and the The flower shaft sleeve 17 is rotatably connected, and when it needs to be locked, the flower shaft 16 moves to the inside and outside of the flower shaft sleeve 1 under the action of the flower shaft spring 162, until the pull button 18 is locked, the teeth of the flower shaft 16 and the flower shaft sleeve The tooth slots of 17 are engaged, and the sprocket shaft 16 is fixedly connected with the sprocket shaft sleeve 17 . The teeth of the sprocket 16 can be single teeth or multiple teeth. When the teeth of the sprocket 16 are single teeth, the tooth slot of the sprocket bush 17 is one more tooth than that of the sprocket 16 .

The main frame 1 is also provided with a folding footrest 37 having two states of folding and extending, and a footrest groove 45 for accommodating the folding footrest. The handlebar 8 is a retractable handlebar 8. All acute angles are less than 10°. The upper rear end of the main frame 1 is provided with a small wheel 38 for towing the two-wheeled vehicle after folding, which is convenient for towing when the two-wheeled vehicle is folded, and the small wheel 38 can be folded. The backboard 40 is folded, and the battery pack 39 of the two-wheeled vehicle that can be towed and folded is provided on the front lower fork frame.

As shown in Figure 4/5, the two-wheeled vehicle that can be towed and can be towed after being folded can be towed on the back or on the back.

Embodiment 2

As shown in Figures 6 and 7, the difference between this embodiment and the first embodiment is that in this embodiment, the unlocking methods of the rear sleeve and the main frame are different. In order to improve the shock absorption effect, the rear folding locking part includes a A rear sleeve rotating tube 46 on the sleeve 19 and rotatably connected to the rear end of the main frame 1, a rear sleeve unlocking block 47 fixed on the rear sleeve rotating tube 46, and retractably inserted in the rear sleeve The rear sleeve unlocking pin 48 on the unlocking block 47, the shock absorber mounting rod 410 fixed on the auxiliary strut 21, and the shock absorber whose two ends are fixedly connected with the rear sleeve unlocking block 47 and the shock absorber installation rod 410 and is retractable by itself The rod 49, the shock-absorbing spring 40 sleeved on the shock-absorbing rod 49, the two ends of the shock-absorbing spring 40 abut on the rear cover unlocking block 47 and the shock-absorbing installation rod 410, respectively, the main frame 1 is two pieces on the left and right, and the left A space for storing the front wheels is formed between the sheet 01 and the right sheet 02, a rear sleeve unlocking shaft 411 is fixed between the rear ends of the left sheet 01 and the right sheet 02, and a locking hole is provided on the rear sleeve unlocking shaft. When the 48 is inserted into the locking hole, the rear sleeve 19 is fixed relative to the main frame 1 and is in an open state, and the rear sleeve 19 then covers the swing of the rotating tube 46 and the buffering of the shock absorber spring 40 to realize shock absorption.

Embodiment 3

The difference between this embodiment and the first embodiment is that, as shown in FIG. 9 , the front rotary locking portion 15 can also be a front locking plate 1501 rotatably connected to the front sleeve and provided with a locking hole and a front lower fork frame. The front lock block 1502, when the front lock plate 1501 is buckled on the front lock block 1502, the front lower fork and the front sleeve are relatively fixed, otherwise they can rotate relative to each other, and the rotation angle range of the front lower fork is 0° -180°. The rear rotation locking portion 36 may also be in the form described above.

Embodiment 4

The difference between this embodiment and the first embodiment is that, as shown in FIG. 10 , the front rotary locking portion 15 can also be the front sleeve 7 and the front lower fork 9 that are connected to each other, and the through holes opened on the two can also be used. And the locking bolt 03 penetrated in the through hole realizes unlocking and fixing, and the rotation angle range of the front lower fork is 0°-180°. The rear rotation locking portion 36 may also be in the form described above.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and its purpose is to enable those who are familiar with the technology to understand the content of the present invention and implement accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The utility model provides a can drag two wheeler that can go back and forth after folding, its include the main frame, with main frame looks fixed connection's sub vehicle frame, install in the front wheel fork subassembly of main frame front end portion, install in the rear wheel fork subassembly of main frame rear end portion, the front wheel fork subassembly include the front wheel fork and rotate connect in front wheel on the front wheel fork, its characterized in that: the front wheel fork comprises a front sleeve which can rotate and be locked with the main frame and a handlebar which is fixedly connected with the front sleeve, the front lower fork frame is sleeved with the front sleeve, can coaxially rotate and is relatively locked, the front wheel is rotatably connected to the front lower fork frame, the front lower fork frame and the front sleeve are unfolded and folded, when the front under fork and the front sleeve are deployed simultaneously, the front sleeve is projected toward the front lower side of the main frame, the rotating shaft of the front lower fork frame and the front wheel is parallel to the rotating connecting shaft of the front sleeve and the main frame, when the front lower fork and the front bushing are folded simultaneously, the front bushing is folded toward the main frame and is parallel to the main frame or forms an acute angle with the main frame, the rotating shaft of the front lower fork and the front wheel is vertical to or forms an acute angle with the rotating connecting shaft of the front sleeve and the main frame.

2. The folded towable-backable two-wheeled vehicle of claim 1, wherein: the rear wheel fork assembly comprises a rear sleeve which can rotate and be locked with the main frame and a rear lower fork which is sleeved with the rear sleeve and can coaxially rotate and be relatively locked, the rear wheel is rotatably connected to the rear lower fork, the rear lower fork and the rear sleeve have unfolded and folded states, when the rear under fork and the rear sleeve are deployed simultaneously, the rear sleeve projects toward the rear lower side of the main frame, the rotating shaft of the rear lower fork frame and the rear wheel is parallel to the rotating connecting shaft of the rear sleeve and the main frame, when the rear lower fork and the rear sleeve are folded simultaneously, the rear sleeve is folded towards the front upper part of the main frame in a rotating mode and is parallel to the main frame or forms an acute angle, and a rotating shaft of the rear lower fork and the rear wheel is perpendicular to or forms an acute angle with a rotating connecting shaft of the rear sleeve and the main frame.

3. The folded towable-backable two-wheeled vehicle of claim 1, wherein: the middle part of the main frame is provided with a first yielding groove, and when the front lower fork frame and the front sleeve are folded simultaneously, the front lower fork frame, the front sleeve and the front wheel are positioned in the first yielding groove.

4. The folded towable-backable two-wheeled vehicle of claim 1, wherein: the front wheel fork comprises a front folding locking part which enables the front sleeve and the main frame to be locked and unlocked relatively, a first clamping groove is formed in the front sleeve, the front folding locking part comprises a first lock pin which is connected to the main frame in a sliding mode and a first elastic piece which is used for enabling the first lock pin to always have a movement trend towards the first clamping groove, when the first lock pin is withdrawn out of the first clamping groove, the front sleeve can be turned and folded relative to the main frame, and when the first lock pin is inserted into the first clamping groove, the front sleeve is fixed relative to the main frame and is in an opening state.

5. The folded towable-backable two-wheeled vehicle of claim 1, wherein: the front wheel fork comprises a front rotary locking part which enables the front sleeve and the front lower fork frame to be locked and unlocked relatively, the front rotary locking part comprises a spline shaft sleeve fixedly arranged in the front sleeve, a spline shaft matched with the spline shaft sleeve and penetrating into the spline shaft sleeve, and a spanner buckle which is arranged on the front sleeve and used for locking and separating the spline shaft and the spline shaft sleeve, the spline shaft sleeve is fixedly connected with the handlebar, the spline shaft is fixedly connected with the front lower fork frame, when the spanner buckle is unlocked, teeth of the spline shaft slide out of tooth grooves in the spline shaft sleeve, the spline shaft is rotatably connected with the spline shaft sleeve, when the spanner buckle is locked, the teeth of the spline shaft are meshed with the teeth grooves in the spline shaft sleeve, and the spline shaft is fixedly connected with the spline shaft sleeve.

6. The folded towable-backable two-wheeled vehicle of claim 1, wherein: the auxiliary frame comprises auxiliary support rods and seat cushion components, wherein two ends of each auxiliary support rod are respectively connected with two ends of the main frame, the seat cushion components are arranged on the auxiliary support rods, and each seat cushion component comprises an auxiliary upper support rod, the front end part of each auxiliary upper support rod is rotatably connected with the front end part of the main frame, and the auxiliary upper support rods can stretch and can also be fixed in length; the auxiliary lower stay bar can be folded, and two end parts of the auxiliary lower stay bar are respectively and rotatably connected with the rear end part of the main frame and the rear end part of the auxiliary upper stay bar; a sub-locking portion for locking the sub-lower stay when deployed; the seat cushion and the backrest are arranged on the auxiliary upper stay bar; the seatpad subassembly has folding and expansion state, works as when the seatpad subassembly expandes, the vaulting pole extension is gone up to the pair, and vice lower vaulting pole expandes and vice locking portion is in the locking state, works as when the seatpad subassembly is folded, the vaulting pole shrink is gone up to the pair, vice lower vaulting pole fold and with vice vaulting pole is parallel or the contained angle is the acute angle.

7. The folded towable-backable two-wheeled vehicle of claim 6, wherein: the auxiliary upper stay bar comprises an auxiliary upper outer sleeve, a limiting inner pull rod which is coaxially arranged with the auxiliary upper outer sleeve and is fixed in the auxiliary upper outer sleeve, and a telescopic cross bar beam which is sleeved in the limiting inner pull rod and penetrates through the auxiliary upper outer sleeve, and the seat cushion and the backrest are arranged on the telescopic cross bar beam.

8. The folded towable-backable two-wheeled vehicle of claim 7, wherein: the lower auxiliary stay bar comprises a lower auxiliary first folding bar hinged with the telescopic cross beam, a lower auxiliary second folding bar hinged with the lower auxiliary stay bar and a middle folding locking portion, the middle folding locking portion has two states of locking and unlocking, when the middle folding locking portion is locked, the lower auxiliary first folding bar and the lower auxiliary second folding bar are unfolded and locked, and when the middle folding locking portion is unlocked, the lower auxiliary first folding bar and the lower auxiliary second folding bar can be folded relatively.

9. The folded towable-backable two-wheeled vehicle of claim 2, wherein: the rear wheel fork assembly comprises a rear folding locking part which enables the rear sleeve and the main frame to be locked and unlocked relatively, a second clamping groove is formed in the rear sleeve, the rear folding locking part comprises a second lock pin which is connected to the main frame in a sliding mode, and a second elastic piece which is used for enabling the second lock pin to always have a movement trend towards the second clamping groove.

10. The folded towable-backable two-wheeled vehicle of claim 2, wherein: the rear wheel fork assembly comprises a rear rotary locking part which enables the rear sleeve and the rear lower fork frame to be locked and unlocked relatively, the rear rotary locking part comprises a spline shaft sleeve fixedly arranged in the rear sleeve, a spline shaft matched with the spline shaft sleeve and penetrating into the spline shaft sleeve, and a spanner buckle which is arranged on the rear sleeve and used for locking and unlocking the spline shaft and the spline shaft sleeve, the spline shaft sleeve is fixedly connected with the main frame, the spline shaft is fixedly connected with the rear lower fork frame, when the spanner buckle is unlocked, teeth of the spline shaft slide out of tooth grooves in the spline shaft sleeve, the spline shaft is rotatably connected with the spline shaft sleeve, when the spanner buckle is locked, the teeth of the spline shaft are meshed with the tooth grooves in the spline shaft sleeve, and the spline shaft is fixedly connected with the spline shaft sleeve.

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