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

Abstract

The utility model discloses a can drag after folding two wheeler that can walk back, 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, the front wheel fork include with the main frame rotatable and lockable front sleeve, with front sleeve looks fixed connection's handlebar, the utility model discloses form the space of accomodating the front wheel fork subassembly on the main frame, form the space of accomodating the rear wheel between main frame and sub vehicle frame, very big saving can drag after folding the space after the two wheeler that can walk back.

Description

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

Technical Field

The utility model relates to a two-wheeled vehicle which can be dragged and carried after being folded.

Background

The two-wheeled vehicle capable of being dragged and carried back after being folded is widely used in cities because the problem of traffic jam is effectively avoided due to the flexibility of the two-wheeled vehicle, the requirement of a user is higher and higher, the requirement on the two-wheeled vehicle capable of being dragged and carried back after being folded is also higher, and the problem which needs to be solved at present is how to fold the two-wheeled vehicle capable of being dragged and carried back after being folded to realize portability.

Disclosure of Invention

The utility model aims at providing a collapsible and folding back after the less back of occupation space can drag the capable two wheeler of going back of the body.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a two-wheel vehicle capable of being towed and backed after being folded comprises a main frame, an auxiliary frame fixedly connected with the main frame, a front wheel fork assembly arranged at the front end part of the main frame, a rear wheel fork assembly arranged at the rear end part of the main frame, a front wheel fork assembly comprising a front wheel fork and a front wheel rotatably connected to the front wheel fork, a handlebar fixedly connected with the front wheel fork, a front lower fork sleeved with the front wheel fork and capable of coaxially rotating and relatively locking, wherein the front wheel is rotatably connected to the front lower fork, the front lower fork and the front sleeve have an unfolding state and a folding state, when the front lower fork and the front sleeve are unfolded simultaneously, the front sleeve extends towards the front lower part of the main frame, a rotating shaft of the front wheel is parallel to a connecting shaft of the front sleeve and the rotation of the main frame, when the front lower fork and the front sleeve are folded simultaneously, the front sleeve is folded towards the main frame and is parallel to or forms an acute angle with the main frame, and a rotating shaft of the front lower fork and the front wheel is perpendicular to or forms an acute angle with a rotating connecting shaft of the front sleeve and the main frame.

Preferably, 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.

Preferably, 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 located in the first yielding groove.

Preferably, the front wheel fork includes a front folding locking portion for locking and unlocking the front sleeve relative to the main frame, the front sleeve is provided with a first locking groove, the front folding locking portion includes a first locking pin slidably connected to the main frame, and a first elastic member for always allowing the first locking pin to have a tendency of moving toward the first locking groove.

Preferably, the front wheel fork includes a front rotation locking portion for locking and unlocking the front sleeve and the front lower fork relatively, the front rotation locking portion includes a spline shaft sleeve fixedly disposed in the front sleeve, a spline shaft matched with the spline shaft sleeve and penetrating the spline shaft sleeve, and a wrench buckle mounted on the front sleeve for locking and unlocking 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, when the wrench 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 wrench buckle is locked, the teeth of the spline shaft are engaged with the tooth grooves in the spline shaft sleeve, and the spline shaft is fixedly connected with the spline shaft sleeve.

Preferably, the auxiliary frame comprises auxiliary support rods of which two ends are respectively connected with two ends of the main frame, and a seat cushion assembly arranged on the auxiliary support rods, wherein the seat cushion assembly comprises an auxiliary upper support rod of which the front end part is rotatably connected with the front end part of the main frame and can stretch and retract to a fixed 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.

Furthermore, the auxiliary upper stay bar comprises an auxiliary upper outer sleeve, a limiting inner pull rod coaxially arranged with the auxiliary upper outer sleeve and fixed in the auxiliary upper outer sleeve, and a telescopic cross beam sleeved in the limiting inner pull rod and penetrating through the auxiliary upper outer sleeve, and the seat cushion and the backrest are arranged on the telescopic cross beam.

Furthermore, the vice lower bracing piece include with flexible horizontal beam looks articulated vice first folding rod down, with vice bracing piece looks articulated vice second folding rod and well folding locking portion down, well folding locking portion has two states of locking and unblock, works as when well folding locking portion is locked, vice first folding rod down with vice second folding rod expandes and locks down, works as when well folding locking portion unblock, vice first folding rod down with vice second folding rod can be folded relatively down.

Furthermore, 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 part which enables the second lock pin to always have a movement trend towards the second clamping groove is used for enabling the second lock pin to always have a movement trend towards the second clamping groove.

Further, 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 through 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.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model discloses form the space of accomodating front wheel fork subassembly on the main frame, sub vehicle frame and main frame four ends that both connect are buckled, and both concatenations and form the hexagon, form the space of accomodating the rear wheel between main frame and sub vehicle frame, very big saving after can dragging after folding the space after can the back of the body two wheeler of going.

Drawings

FIG. 1 is a schematic view of the present invention according to the first embodiment;

FIGS. 2 and 3 are schematic views of a front rotary locking assembly according to a first embodiment of the present invention, respectively, when locked and unlocked;

fig. 4 and 5 are schematic diagrams of the folded two-wheeled vehicle capable of being towed and carried on back and the mechanism for towing respectively in the first embodiment;

fig. 6 and 7 are schematic structural views of the two-wheeled vehicle which can be towed after being folded and can be carried on the back and the rear folding locking part in the second embodiment respectively;

FIGS. 8, 11 and 12 are schematic structural views of a spline shaft and a spline shaft sleeve in the first and second embodiments;

FIG. 9 is a schematic structural view of a front fork or a rear fork in the third embodiment;

fig. 10 is a schematic structural view of a front fork or a rear fork in the fourth embodiment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are 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. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature. It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements 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 the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, the two-wheeled vehicle which can be towed after being folded and can be backed includes a main frame 1, a sub-frame 2 fixedly connected to the main frame 1, a front fork assembly 3 mounted on a front end portion of the main frame 1, and a rear fork assembly 4 mounted on a rear end portion of the main frame 1. The two-wheeled vehicle can be an electric vehicle, and can also be a fuel oil power vehicle and the like.

The front wheel fork assembly 3 comprises a front wheel fork 5 and a front wheel 6 rotatably connected to the front wheel fork 5, the front wheel fork 5 comprises a front sleeve 7 which can rotate and be locked with the main frame 1, a handle bar 8 fixedly connected with the front sleeve 7, a front lower fork 9 which is sleeved with the front sleeve 7 and can coaxially rotate and relatively lock, a front wheel 6 is rotatably connected on the front lower fork 9, the front lower fork 9 and the front sleeve 7 have unfolding and folding states, when the front lower fork frame 9 and the front sleeve 7 are unfolded simultaneously, the front sleeve 7 extends towards the front lower part of the main frame 1, the rotating shaft of the front lower fork frame 9 and the front wheel 6 is parallel to the rotating connecting shaft of the front sleeve 7 and the main frame 1, when the front lower fork 9 and the front sleeve 7 are folded simultaneously, the front sleeve 7 is folded toward the main frame 1 and is parallel to or forms an acute angle with the main frame 1, and the rotating shaft of the front lower fork 9 and the front wheel 6 is perpendicular to or forms an acute angle with the rotating connecting shaft of the front sleeve 7 and the main frame 1.

The middle part of the main frame 1 is provided with a first abdicating groove 10, and when the front lower fork 9 and the front sleeve 7 are folded simultaneously, the front lower fork 9, the front sleeve 7 and the front wheel 6 are positioned in the first abdicating groove 10.

The front wheel fork 5 comprises a front folding locking part 11 which enables a front sleeve 7 and the main frame 1 to be locked and unlocked relatively, a first clamping groove 12 is formed in the front sleeve 7, the front folding locking part 11 comprises a first locking pin 13 connected to the main frame 1 in a sliding mode, a first elastic piece 14 used for enabling the first locking pin 13 to have a movement trend towards the first clamping groove 12 all the time, when the first locking pin 13 is withdrawn from the first clamping groove 12, the front sleeve 7 can be turned and folded relative to the main frame 1, and when the first locking pin 13 is inserted into the first clamping groove 12, the front sleeve 7 is fixed relative to the main frame 1 and is in an opening state.

As shown in fig. 2/3, the front wheel fork 5 includes a front rotation locking portion 15 for locking and unlocking the front sleeve 7 and the front lower fork 9 relatively, the front rotation locking portion 15 includes a spline shaft sleeve 17 fixedly disposed in the front sleeve 7, a spline shaft 16 matched with the spline shaft sleeve 17 and passing through the spline shaft sleeve 17, a tightening screw 163 disposed in the spline shaft sleeve 17 and fixedly connected with the spline shaft 16, and a spline shaft spring 162 disposed between the tightening screw 163 and the spline shaft sleeve 17, one end of the spline shaft spring 162 is fixed on the tightening screw 163, and the other end is fixed with an inner limit ring 165, and the inner limit ring 165 abuts against an annular shoulder 172 in the spline shaft sleeve 17. A spline shaft spring 162 always making the spline shaft 16 have a tendency to move toward the inside of the spline shaft housing 17, a trigger 18 mounted on the front bushing 7 for locking and unlocking the spline shaft 16 and the spline shaft housing 17, the spline shaft housing 17 being fixedly connected to the handle bar 8, the spline shaft 16 being fixedly connected to the front lower fork 9, as shown in 2/3, the trigger 18 being rotatably connected to the outer side wall of the front bushing 7, the upper part of the U-shaped connecting plate 182 is rotatably connected with a push-out plate 181, the lower end of the push-out plate 181 is rotatably connected with a U-shaped connecting plate 182, a boss 164 is arranged on the spline shaft 16, the boss 164 abuts against the periphery of a through hole in the middle of the U-shaped connecting plate 182 and is fixedly connected with the front lower fork frame 9, in order to enable the rotation to be 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, the boss 164 and the plane bearing 91 are positioned on the same side of the flat plate in the middle of the U-shaped connecting plate 182, and the spline shaft sleeve 17 is positioned. When the trigger 18 is unlocked, the trigger is turned downwards, the push-out plate 181 pushes the U-shaped connecting plate 182 downwards until the teeth 161 of the spline shaft 16 slide out of the tooth grooves 171 of the spline shaft sleeve 17, at this time, the spline shaft 16 is rotatably connected with the spline shaft sleeve 17, when locking is required, the spline shaft 16 moves inwards and outwards of the spline shaft sleeve 1 under the action of the spline shaft spring 162 until the trigger 18 is locked, the teeth 161 of the spline shaft 16 are meshed with the tooth grooves 171 of the spline shaft sleeve 17, and the spline shaft 16 is fixedly connected with the spline shaft sleeve 17. The teeth of the spline shaft 16 may be single teeth or multiple teeth, and when the teeth of the spline shaft 16 are single teeth, the tooth grooves of the spline shaft sleeve 17 are one more than the teeth of the spline shaft 16. The rotation angle of the spindle 16 is in the range of 0 to 180 degrees, and the rotation angle of the spindle is also in the range of the rotation angles of the front lower fork and the rear lower fork.

The rear wheel fork assembly 4 comprises a rear sleeve 19 which can rotate and be locked with the main frame 1, a rear lower fork frame 20 which is sleeved with the rear sleeve 19 and can coaxially rotate and can be relatively locked, and a rear wheel 41, wherein the rear wheel 41 is rotationally connected to the rear lower fork frame 20, the rear lower fork frame 20 and the rear sleeve 19 are unfolded and folded, when the rear lower fork frame 20 and the rear sleeve 19 are unfolded simultaneously, the rear sleeve 19 extends towards the rear lower part of the main frame 1, the rotating shaft of the rear lower fork frame 20 and the rear wheel is parallel to the rotating connecting shaft of the rear sleeve 19 and the main frame 1, and when the rear lower fork frame 20 and the rear sleeve 19 are folded simultaneously, the rear sleeve 19 is rotationally folded towards the front upper part of the main frame 1 and is parallel to the main frame 1 or forms an acute angle, and the rotating shaft of the rear lower fork frame 20 and the rear wheel is vertical to or forms an acute angle with the rotating connecting.

The auxiliary frame 2 comprises an auxiliary stay bar 21 with two ends respectively connected with two ends of the main frame 1 and a seat cushion assembly 22 arranged on the auxiliary stay bar 21, wherein the seat cushion assembly 22 comprises an auxiliary upper stay bar 23 with a front end part rotatably connected with the front end part of the main frame 1 and a telescopic fixed length; a sub lower stay 24 which is foldable and has both end portions rotatably connected to the rear end portion of the main frame 1 and the rear end portion of the sub upper stay 23, respectively; a sub-locking portion for locking the sub-lower stay 24 when deployed; a seat cushion 28 and a backrest 29 provided on the sub upper stay 23; the seat cushion assembly 22 has folded and unfolded states, when the seat cushion assembly 22 is unfolded, the sub upper stay 23 is extended, the sub lower stay 24 is unfolded and the sub locking portion is in the locked state, when the seat cushion assembly 22 is folded, the sub upper stay 23 is contracted, and the sub lower stay 24 is folded and parallel to or at an acute angle with the sub stay 21.

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

The sub-lower stay 24 includes a sub-lower first folding bar 30 hinged to the telescopic beam, a sub-lower second folding bar 31 hinged to the sub-stay 21, and a middle folding locking portion 32, the middle folding locking portion 32 has two states of locking and unlocking, when the middle folding locking portion 32 is locked, the sub-lower first folding bar 30 and the sub-lower second folding bar 31 are unfolded and locked, and when the middle folding locking portion 32 is unlocked, the sub-lower first folding bar 30 and the sub-lower second folding bar 31 can be folded relatively. The middle folding locking part 32 includes a first sliding sleeve 33 fixed to the sub-lower first folding bar 30, a sliding lock pin 35 inserted into the first sliding sleeve 33, a second sliding sleeve 34 fixedly connected to the sub-lower second folding bar 31, and a sliding spring 36 for making the sliding lock pin 35 have a tendency to slide toward the second sliding sleeve 34, when the sliding lock pin 35 slides out of the second sliding sleeve 34, the sub-lower first folding bar 30 and the sub-lower second folding bar 31 can be folded relatively, and when the sliding lock pin 35 is inserted into the second sliding sleeve 34, the sub-lower first folding bar 30 and the sub-lower second folding bar 31 are unfolded and locked relatively.

The rear wheel fork assembly comprises a rear folding locking part which enables the rear sleeve 19 and the main frame 1 to be locked and unlocked relatively, a second clamping groove 42 is formed in the rear sleeve 19, the rear folding locking part comprises a second lock pin 43 connected to the main frame 1 in a sliding mode, and a second elastic piece 44 used for enabling the second lock pin to always have a movement trend towards the second clamping groove.

The rear wheel fork assembly comprises a rear rotary locking part 36 which enables the rear sleeve 19 and the rear lower fork frame 20 to be locked and unlocked relatively, the rear rotary locking part 36 has the same principle as the front rotary locking part 15, and comprises a spline shaft sleeve 17 fixedly arranged in the rear sleeve 19, a spline shaft 16 matched with the spline shaft sleeve 17 and penetrating in the spline shaft sleeve 17, a fastening screw 163 arranged in the spline shaft sleeve 17 and fixedly connected with the spline shaft 16, and a spline shaft spring 162 arranged between the fastening screw 163 and the spline shaft sleeve 17, wherein one end of the spline shaft spring 162 is fixed on the fastening screw 163, the other end of the spline shaft spring 162 is fixedly provided with an inner limiting ring 165, and the inner limiting ring 165 is abutted against an annular bushing shoulder 172 in the spline shaft sleeve 17. The spline shaft spring 162 always makes the spline shaft 16 have a tendency to move toward the inside of the spline shaft housing 17, the trigger 18 mounted on the front sleeve 7 for locking and unlocking the spline shaft 16 and the spline shaft housing 17, the spline shaft housing 17 fixedly connected to the handle bar 8, the spline shaft 16 fixedly connected to the front lower fork 9, as shown in fig. 7, the trigger 18 rotatably connected to the outer side wall of the rear sleeve 19, the upper part of the U-shaped connecting plate 182 is rotatably connected with a push-out plate 181, the lower end of the push-out plate 181 is rotatably connected with a U-shaped connecting plate 182, a boss 164 is arranged on the spline shaft 16, the boss 164 abuts against the periphery of a through hole in the middle of the U-shaped connecting plate 182 and is fixedly connected with the front lower fork frame 9, in order to enable the rotation to be 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, the boss 164 and the plane bearing 91 are positioned on the same side of the flat plate in the middle of the U-shaped connecting plate 182, and the spline shaft sleeve 17 is positioned. When the trigger 18 is unlocked, the trigger 18 is turned downwards, the push-out plate 181 pushes the U-shaped connecting plate 182 downwards until the teeth 161 of the spline shaft 16 slide out of the tooth grooves 171 of the spline shaft sleeve 17, at this time, the spline shaft 16 is rotatably connected with the spline shaft sleeve 17, when locking is required, the spline shaft 16 moves inwards and outwards towards the spline shaft sleeve 1 under the action of the spline shaft spring 162 until the trigger 18 is locked, the teeth of the spline shaft 16 are meshed with the tooth grooves of the spline shaft sleeve 17, and the spline shaft 16 is fixedly connected with the spline shaft sleeve 17. The teeth of the spline shaft 16 may be single teeth or multiple teeth, and when the teeth of the spline shaft 16 are single teeth, the tooth grooves of the spline shaft sleeve 17 are one more than the teeth of the spline shaft 16.

The main frame 1 is further provided with a folding step 37 having both a folded and an extended state and a step groove 45 for receiving the folding step. The handlebar 8 is a telescopic handlebar 8. All acute angles are less than 10. The upper rear end part of the main frame 1 is provided with a small wheel 38 which is convenient for dragging when the folded back type back-to-back two-wheeled vehicle is folded, the small wheel 38 can be folded, the lower end surface of the main frame 1 is provided with a backup plate 40 which is convenient for back-to-back, and a battery pack 39 of the folded back type back-to-back two-wheeled vehicle is provided with a front lower fork frame.

As shown in fig. 4/5, the folded and towed two-wheeled vehicle can be towed either back or back.

Example two

As shown in fig. 6 and 7, the present embodiment is different from the first embodiment in that: in this embodiment, the unlocking mode of the rear sleeve is different from that of the main frame, in order to improve the shock absorbing effect, the rear folding locking portion comprises a rear sleeve rotating tube 46 fixed on the rear sleeve 19 and rotatably connected with the rear end portion of the main frame 1, a rear sleeve unlocking block 47 fixed on the rear sleeve rotating tube 46, a rear sleeve unlocking pin 48 telescopically inserted on the rear sleeve unlocking block 47, a shock absorbing mounting rod 410 fixed on the auxiliary stay 21, a shock absorbing rod 49 with two ends respectively fixedly connected with the rear sleeve unlocking block 47 and the shock absorbing mounting rod 410 and capable of self-expanding, a shock absorbing spring 40 sleeved on the shock absorbing rod 49, two ends of the shock absorbing spring 40 respectively abut against the rear sleeve unlocking block 47 and the shock absorbing mounting rod 410, the main frame 1 respectively comprises a left piece and a right piece, a space for accommodating front wheels is formed between the left piece 01 and the right piece 02, a rear sleeve unlocking rotating shaft 411 is fixed between the rear end portions of the left piece 01 and the right, the rear cover unlocking rotating shaft is provided with a locking hole, when the rear cover unlocking pin 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 then the rear sleeve 19 is sleeved with the swinging of the rotating pipe 46 and the buffering of the shock absorbing spring 40 to realize shock absorption.

EXAMPLE III

The difference between this embodiment and the first embodiment is: as shown in fig. 9, the front rotation locking portion 15 may also be a front locking plate 1501 rotatably connected to the front sleeve and having a locking hole, and a front locking block 1502 disposed on the front lower fork, when the front locking plate 1501 is fastened to the front locking block 1502, the front lower fork and the front sleeve are relatively fixed, otherwise, the front lower fork and the front sleeve are relatively rotatable, and the rotation angle of the front lower fork is in the range of 0 ° to 180 °. The rear rotational locking portion 36 may also be of the form described above.

Example four

The difference between this embodiment and the first embodiment is: as shown in fig. 10, the front rotation locking portion 15 may also be a front sleeve 7 and a front lower fork 9 which are sleeved with each other, and the front rotation locking portion is unlocked and fixed by a through hole formed in the front sleeve 7 and a locking bolt 03 inserted into the through hole, and the rotation angle range of the front lower fork is 0 ° to 180 °. The rear rotational locking portion 36 may also be of the form described above.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by 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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