CN212766598U - Bicycle with a wheel - Google Patents

Abstract

The utility model relates to a vehicle technical field specifically discloses a bicycle, and this bicycle includes handlebar assembly, back handlebar assembly, roof beam structure and a steering system. The front beam and the rear beam of the beam frame are rotatably connected, so that the bicycle can be in an unfolding state and a folding state, the size of the bicycle in the length direction can be greatly reduced when the bicycle is in the folding state, and the bicycle is convenient to carry and store. In order to make children can control the bicycle and turn to, reach the purpose of tempering children's control ability, children sit on the front seat subassembly to control front handlebar subassembly, front handlebar subassembly is connected with the front wheel, and front handlebar subassembly rotates and can control the front wheel and turn to. In order to avoid the situation that children cannot avoid danger accurately and timely, the front end of the steering system is connected with the front handlebar assembly, the rear end of the steering system is connected with the rear handlebar assembly, an adult sitting on the backseat assembly controls the front handlebar assembly to rotate through the rear handlebar assembly, and then the front wheel is controlled to rotate, so that the steering of the bicycle is realized.

Description

Bicycle with a wheel

Technical Field

The utility model relates to a vehicle technical field especially relates to a bicycle.

Background

Along with the improvement of living standard of people, more attention is paid to the accompany of children, and more activities such as outing with children are provided. The bicycle used by two persons in the prior art is generally used for controlling the direction of a front handlebar, is not provided with a rear handlebar or fixed by the rear handlebar, and cannot be used for controlling the direction. Because children have poor controllability to the bicycle and the ability of prejudging danger, if children sit in the front seat and drive the front handlebar and rotate, there is very big potential safety hazard in controlling the front wheel steering. If the direction is controlled to the adult seat in the front seat, children sit in the back seat, then the adult can't see children in real time, and when children had dangers such as fall, adult can't protect children, and children sit and can't play the effect of tempering children's control ability in the back seat. In addition, the tandem bicycle is inconvenient to carry to the outside due to the large size thereof, thereby affecting the use of the user.

Therefore, a bicycle with high safety and portability is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bicycle to improve the security of bicycle and make bicycle portable.

To achieve the purpose, the utility model adopts the following technical proposal:

a bicycle, comprising: by preceding handlebar subassembly, front seat subassembly, back handlebar subassembly and the back seat subassembly that sets gradually after to, still include:

the beam frame is connected with the front handlebar assembly, the front seat assembly, the rear handlebar assembly and the rear seat assembly respectively and comprises a front beam and a rear beam, and the front beam is rotatably connected with the rear beam so as to enable the bicycle to be in an unfolded state and a folded state;

the front steering system, the lower extreme of front handlebar subassembly is connected with the front wheel, the front handlebar subassembly rotates and can control the front wheel turns to, steering system's front end with the front handlebar subassembly is connected, steering system's rear end with the back handlebar subassembly is connected, so that the back handlebar subassembly can drive the front handlebar subassembly rotates.

Preferably, the steering system includes:

the front fixing block is connected with the front handlebar assembly;

the front end of the left control assembly is connected with the front fixing block and is positioned on the left side of the front handlebar assembly, and the rear end of the left control assembly is connected with the left handle of the rear handlebar assembly;

the right control assembly, the front end of right control assembly with the preceding fixed block is connected, and is located the right side of preceding handlebar assembly, the rear end of right control assembly with the right handle of back handlebar assembly is connected, back handlebar assembly passes through left control assembly with right control assembly drives preceding handlebar assembly rotates.

Preferably, the rear end of the rear beam is connected with a rear wheel set, and the rear wheel set includes:

the left wheel and the right wheel are arranged at intervals along the left-right direction;

the rear shaft sleeve is connected to the rear end of the rear beam, a rear rotating shaft is arranged in the rear shaft sleeve, and the left wheel and the right wheel are respectively connected to two ends of the rear rotating shaft.

Preferably, the rear seat assembly includes a rear seat post rotatably provided to the front beam in a front-rear direction; the bicycle further comprises:

the rear end of the rear support frame is connected with the rear beam, the front end of the rear support frame is detachably connected with the rear seat support rod, and the rear seat support rod, the rear beam and the rear support frame form a triangular structure.

Preferably, the backseat strut comprises an upper strut and a lower strut which are rotatably connected, so that the backseat strut can be folded; the lower end of the lower supporting rod is rotatably connected with the front beam.

Preferably, the lower end of the rear handlebar assembly is connected to the front beam in a front-to-rear rotatable manner; the bicycle further comprises:

one end of the limiting rod is fixedly connected with one of the rear handlebar assembly and the rear seat assembly, and the other end of the limiting rod is detachably connected with the other of the rear handlebar assembly and the rear seat assembly.

Preferably, the rear handlebar assembly includes:

the lower end of the rear inner rod is rotatably connected with the front beam;

the rear outer rod is sleeved outside the rear inner rod and can rotate relative to the rear inner rod, the front seat assembly is connected with the rear outer rod, and the lower end of the front seat assembly is detachably connected with the front beam.

Preferably, the front seat assembly includes:

a front seat strut connected to the rear handlebar assembly;

the lower end of the front seat support rod is connected with the front channel steel, and the front channel steel can be spliced with the front beam.

Preferably, the front handlebar assembly includes:

the front end of the front beam is connected with the front outer rod;

interior pole in the front, including setting up from top to bottom and rotating last bull stick and the lower bull stick of connecting, just the upper bull stick can rotate extremely with the expansion position of the coaxial setting of lower bull stick to and can rotate extremely with the folding position that the upper bull stick is the angle setting, the lower bull stick rotates and wears to locate preceding outer pole, the lower extreme of lower bull stick is connected with the front wheel.

Preferably, the bicycle further comprises a transmission system, the transmission system comprising:

the front chain wheel and the middle chain wheel group are respectively and rotatably arranged on the beam frame along the front and back directions;

the front chain is in transmission connection with the front chain wheel and the middle chain wheel set;

the rear chain wheel is sleeved outside the rear rotating shaft;

and the rear chain is in transmission connection with the middle chain wheel set and the rear chain wheel.

The utility model has the advantages that:

the front beam is connected with the rear beam in a rotating mode, so that the bicycle can be in an unfolding state and a folding state, the size of the bicycle in the folding state can be greatly reduced in the length direction, a user can place the bicycle in a trunk of a car, and the bicycle is convenient to carry. To enable an adult to view the condition of the child at any time, the child sits on the front seat assembly to control the front handlebar assembly and the adult sits on the rear seat assembly to control the rear handlebar assembly. In order to make children can control the bicycle and turn to, reach the purpose of tempering children's controllability, the front handlebar subassembly is connected with the front wheel, and the front wheel can be controlled in the rotation of front handlebar subassembly and turns to. In order to avoid the situation that children cannot avoid danger accurately and timely, the front end of a steering system is connected with a front handlebar assembly, the rear end of the steering system is connected with a rear handlebar assembly, an adult sitting on a backseat assembly controls the front handlebar assembly to rotate through the rear handlebar assembly, synchronous motion of the front handlebar assembly and the rear handlebar assembly is achieved, and then the front wheels are controlled to steer, and steering of a bicycle is achieved.

Drawings

Fig. 1 is a schematic structural view of a bicycle in a deployed state according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a bicycle according to an embodiment of the present invention in a folded state;

FIG. 3 is a schematic view of a portion of a bicycle in a folded state according to an embodiment of the present invention;

FIG. 4 is a structural schematic diagram of the bicycle of FIG. 3 from another perspective;

FIG. 5 is a schematic view of a portion of a bicycle in an unfolded state according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a steering system of a bicycle according to an embodiment of the present invention.

In the figure:

1. a front handlebar assembly; 11. a front outer bar; 12. a front inner rod; 121. an upper rotating rod; 122. a lower rotating rod;

2. a front seat assembly; 21. a front seat strut; 22. a front channel steel;

3. a rear handlebar assembly; 31. a rear inner rod; 32. a rear outer bar; 33. a rear steering lever; 34. a rear handlebar body;

4. a rear seat assembly; 41. a rear seat strut; 411. an upper support rod; 412. a lower support rod;

5. a beam frame; 51. a front beam; 52. a rear beam;

6. a steering system;

61. a front fixed block; 611. a ferrule; 612. a left insertion block; 613. a right insertion block;

62. a left control assembly; 621. a left spring; 622. a left cable; 623. a left sleeve;

63. a right control assembly; 631. a right spring; 632. a right cable; 633. a right sleeve;

64. a butting block;

7. a rear wheel set; 71. a left wheel; 72. a right wheel; 73. a rear shaft sleeve; 74. a rear rotating shaft;

8. a front wheel;

9. a transmission system; 91. a front sprocket; 92. a middle sprocket set; 93. a front chain; 94. a rear sprocket; 95. a rear chain;

10. a limiting rod;

20. a front support frame; 201. a diagonal bar; 202. a cross bar;

30. a rear support frame; 301. a rear support frame body; 302. back channel steel;

40. and (7) mounting frames.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

The present invention is limited to certain orientation words, and when no opposite explanation is given, the used orientation words are "upper", "lower", "left", "right", "inner" and "outer", and these orientation words are adopted for easy understanding, and therefore do not constitute a limitation to the scope of the present invention.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a bicycle that can be used when an adult and a child play in an outing or the like, but is not limited thereto, and can be used in other places to improve the degree of safety and portability thereof.

As shown in fig. 1 and 2, the bicycle provided by the present embodiment includes a front handlebar assembly 1, a front seat assembly 2, a rear handlebar assembly 3, a rear seat assembly 4, a beam frame 5 and a steering system 6, which are sequentially arranged from front to rear, wherein the front handlebar assembly 1, the front seat assembly 2, the rear handlebar assembly 3 and the rear seat assembly 4 are respectively connected to the beam frame 5.

The beam frame 5 includes a front beam 51 and a rear beam 52. Preferably, the front handlebar assembly 1 is attached to the front end of the front beam 51 and the rear end of the rear beam 52 is attached to the rear wheel set 7. The front frame 51 is rotatably coupled to the rear frame 52 to allow the bicycle to be unfolded and folded, and the bicycle in the folded state can be greatly reduced in size in the longitudinal direction thereof to facilitate a user to place the bicycle in a trunk of the automobile. Preferably, the rear frame 52 is disposed substantially horizontally when the bicycle is in the unfolded state, and the rear frame 52 rotates downward and forward about a horizontal axis when the bicycle is brought from the unfolded state to the folded state, and in this embodiment, the rear frame 52 and the rear wheel group 7 connected to the rear frame 52 can rotate approximately 150 ° to 170 °, so that the folded bicycle does not increase in size in the height direction. Of course, it is understood that the rotation angle of the rear beam 52 is not limited thereto, and the rear beam 52 may be rotated arbitrarily within the range of 180 ° as long as the rear beam 52 and the rear wheel group 7 do not interfere with other members such as the front beam 51. Of course, in other embodiments, the rear beam 52 rotates left, forward, or right, forward about a vertical axis, or the rear beam 52 rotates up, forward about a horizontal axis as the bicycle is brought from the unfolded state to the folded state. It is understood that the left-right direction is a left-right direction when the user rides the bicycle, or a left-right direction when facing the bicycle.

Preferably, the front beam 51 and the rear beam 52 are rotatably connected by a central pivot. Furthermore, the front beam 51 is provided with a center shaft hole, the center shaft is rotatably inserted into the center shaft hole, and two ends of the center shaft extend out of the center shaft hole. The back beam 52 includes two beam plates disposed in parallel, and the two beam plates are rotatably connected to two ends of the protruding shaft hole of the central rotating shaft, respectively.

As shown in fig. 1 and 2, the rear seat assembly 4 includes a rear seat stay 41, and the rear seat stay 41 is provided to the front beam 51 to be rotatable forward and backward. Specifically, the rotational axis of rear seat strut 41 is parallel to the rotational axis of rear beam 52, and rear seat strut 41 rotates forward and downward, thereby lowering the height of the bicycle. The rear seat assembly 4 may also include a rear seat attached to the upper end of the rear seat post 41.

To improve the stability of rear seat assembly 4 when the bicycle is in the deployed state and to avoid rearward and downward rotation of rear seat assembly 4 during riding, the bicycle further includes a rear support frame 30, a rear end of rear support frame 30 is connected to rear beam 52, and preferably, a rear end of rear support frame 30 is connected to rear beam 52 via a rear wheel set 7. The front end of the rear support frame 30 is detachably connected to the rear seat post 41, and the rear seat post 41, the rear beam 52 and the rear support frame 30 form a triangular structure. Preferably, the rear seat strut 41 is arranged to be inclined rearward, i.e. the rear seat strut 41 is arranged at an acute angle to the rear beam 52 and the rear support frame 30, on the one hand to improve the stability of the rear seat strut 41, and on the other hand to prevent the rear wheel unit 7 and the rear beam 52 from rotating when the bicycle passes through the sill.

As shown in fig. 1 and 2, preferably, the rear support frame 30 includes a rear support frame body 301 and a rear channel 302 connected to the front end of the rear support frame body 301, and the rear support rod 41 can be inserted into the rear channel 302, so as to detachably connect the rear support rod 41 and the rear support frame 30. Furthermore, the rear channel steel 302 comprises a bottom plate and two side plates connected to two ends of the bottom plate, the bottom plate and the two side plates are connected into a U-shaped channel steel, the rear seat supporting rod 41 is made of square steel, and the contact area between the rear seat supporting rod 41 and the rear channel steel 302 is large, so that the connection stability is improved. Of course, in other embodiments, the back seat support rod 41 can be a round tube, and such adjustment and change to the specific structure of the back seat support rod 41 do not depart from the spirit and scope of the present invention, and should be limited within the scope of the present invention.

As shown in fig. 2, the rear seat post 41 is preferably rotatably connected to the front beam 51 by a mounting bracket 40, and the mounting bracket 40 includes a bottom plate and two ear plates respectively connected to the left and right ends of the bottom plate, and the bottom plate and the ear plates form a U-shaped structure. The lower side of the bottom plate is connected to the front beam 51, shaft holes are formed in positions opposite to the two lug plates, and the connecting shaft penetrates through the two shaft holes and the rear seat supporting rod 41, so that the rear seat supporting rod 41 is rotatably connected with the front beam 51.

As shown in fig. 1 and 2, preferably, the rear seat strut 41 includes an upper strut 411 and a lower strut 412, the lower end of the lower strut 412 is rotatably connected to the front beam 51, and the upper end of the upper strut 411 is connected to the rear seat. Upper strut 411 and lower strut 412 are pivotally connected to allow rear seat strut 41 to fold, and the folded rear seat strut 41 has a reduced length to prevent rear seat strut 41 from interfering with rear handlebar assembly 3. In other embodiments, the rear seat strut 41 is not formed by connecting the upper strut 411 and the lower strut 412, but is an integral structure, and when the bicycle is folded, the rear seat strut 41 is integrally rotated forward and downward to fold.

As shown in fig. 1, 3 and 4, the lower end of the rear handlebar assembly 3 is preferably connected to the front beam 51 for forward and backward rotation, and in this embodiment, the rear handlebar assembly 3 can rotate about a horizontal axis, which is parallel to the rotation axis of the rear beam 52, as well as about a vertical axis.

As shown in fig. 1, in order to restrict the rotation of the rear handle bar assembly 3 of the bicycle in the unfolded state around the horizontal axis, the bicycle further comprises a limiting rod 10, the front end of the limiting rod 10 is detachably connected with the rear handle bar assembly 3, and the rear end of the limiting rod 10 is fixedly connected with the rear seat assembly 4. When the bicycle is folded, the stopper rod 10 is separated from the rear handle bar assembly 3, the restriction of the rear handle bar assembly 3 is canceled, and the rear handle bar assembly 3 is rotated forward and downward about the horizontal axis, thereby reducing the size of the bicycle in the height direction.

Preferably, the gag lever post 10 includes the gag lever post body and connects in the arc board of gag lever post body front end, and the arc board has the arc groove, and the arc groove can be pegged graft with preceding handlebar assembly 1. Of course, in other embodiments, the front end of the limiting rod 10 can be fixedly connected to the rear handlebar assembly 3, and the rear end of the limiting rod 10 can be detachably connected to the rear seat assembly 4.

As shown in fig. 3, preferably, the rear handlebar assembly 3 is rotatably connected to the front beam 51 through another mounting bracket 40, and the connecting shaft is inserted through the two shaft holes and the lower end of the rear handlebar assembly 3, so as to rotatably connect the rear handlebar assembly 3 to the front beam 51.

As shown in fig. 1 and 3, in the present embodiment, the lower end of the front seat assembly 2 is detachably coupled to the front frame 51, and the rear handlebar assembly 3 is integrally rotated with the front seat assembly 2, thereby increasing the folding and unfolding speed of the bicycle. In order to avoid interference with the front beam 51 when the rear handlebar assembly 3 and the front seat assembly 2 rotate forwards and downwards integrally, the rear handlebar assembly 3 and the front seat assembly 2 rotate backwards and downwards around a horizontal axis to separate the front handlebar assembly 1 from the front beam 51, then the rear handlebar assembly 3 rotates leftwards or rightwards around a vertical axis to enable the front seat assembly 2 to be positioned at the side of the front beam 51, and finally the rear handlebar assembly 3 and the front seat assembly 2 rotate forwards and downwards around the horizontal axis by about 180 degrees, so that the folding of the rear handlebar assembly 3 and the front seat assembly 2 can be completed. Preferably, in the present embodiment, the rear handlebar assembly 3 is rotated 90 ° about the vertical axis, and when the bicycle is in the folded state, the length direction of the rear handlebar body 34 of the rear handlebar assembly 3 coincides with the vertical direction, thereby reducing the size of the bicycle in the left-right direction.

Preferably, in order to enable the rear handlebar assembly 3 to rotate around a vertical axis, the rear handlebar assembly 3 comprises a rear inner rod 31 and a rear outer rod 32, the lower end of the rear inner rod 31 is rotatably connected with the front beam 51, and specifically, the lower end of the rear inner rod 31 is rotatably connected with the rear beam 52 through the mounting bracket 40. The rear outer rod 32 is sleeved outside the rear inner rod 31 and can rotate relative to the rear inner rod 31, when the rear handlebar assembly 3 rotates around a vertical axis, the rear inner rod 31 does not rotate, and the rear outer rod 32 rotates around the axis of the rear outer rod. Preferably, the front housing assembly 2 is connected to the rear outer link 32 such that rotation of the rear outer link 32 simultaneously rotates the front housing assembly 2.

Preferably, to ensure the stability of the front seat assembly 2 and the rear handlebar assembly 3 and to achieve the connection of the front seat assembly 2 with the rear outer bar 32, the front seat assembly 2 is connected with the rear outer bar 32 through the front support frame 20, the front support frame 20 includes a cross bar 202 and a diagonal bar 201, the front end of the cross bar 202 is connected with the front seat assembly 2, and the rear end of the cross bar 202 is connected with the rear outer bar 32 of the rear handlebar assembly 3. The upper end of down tube 201 is connected with the rear end of crossbar 202 and rear outer rod 32, and the lower end of down tube 201 is connected with the lower extreme of front seat subassembly 2, and front seat subassembly 2, down tube 201 and crossbar 202 form the triangle-shaped structure, and front beam 51, rear handlebar assembly 3 and down tube 201 form the triangle-shaped structure.

Preferably, the front seat assembly 2 includes a front seat strut 21 and a front channel 22, the front seat strut 21 is connected with the rear handlebar assembly 3, the upper end of the front seat strut 21 is connected with a front seat, the lower end of the front seat strut 21 is connected with the front channel 22, and the front channel 22 can be plugged with the front beam 51. Preferably, the front channel 22 and the rear channel 302 have the same structure, the front beam 51 is a square tube, and the front channel 22 and the front beam 51 have high connection strength and are convenient to detach.

As shown in fig. 1 and 3, the front handlebar assembly 1 preferably includes a front outer bar 11 and a front inner bar 12, and a front end of a front beam 51 is connected to the front outer bar 11. The preceding inner rod 12 includes the last bull stick 121 and the lower bull stick 122 that set up from top to bottom, and in the outer pole 11 before the lower bull stick 122 rotates and wears to locate, and outer pole 11 before just stretching out at the both ends of lower bull stick 122, the front wheel 8 is connected to the lower extreme of lower bull stick 122. Go up bull stick 121 and lower bull stick 122's upper end and rotate and be connected, go up bull stick 121 can rotate forward to the expansion position with the coaxial setting of lower bull stick 122 to and can rotate backward to the folding position that is the angle setting with last bull stick 121, preferably, be operating condition when going up the vertical setting of bull stick 121, when being horizontal position, for folding position. The front handlebar assembly 1 with the structure can reduce the height of the front handlebar assembly 1 and control the direction of the front wheel 8 through the front handlebar assembly 1.

Preferably, the upper end of the upper rotating rod 121 is connected with an upper locking member, the lower end of the lower rotating rod 122 is connected with a lower locking member, and the upper locking member is connected with the lower locking member through a bolt or a clamping connection, so as to detachably connect the upper rotating rod 121 and the lower rotating rod 122.

The folding process of the bicycle provided in this embodiment is as follows:

as shown in fig. 1 and 2, the central rotating shaft is lifted upwards, the rear beam 52 rotates downwards and forwards around the central rotating shaft, the rear channel steel 302 is separated from the rear seat assembly 4, the rear beam 52 rotates to be abutted against the front beam 51, the folding of the rear half part of the self-weighing bicycle is completed, and the purpose of reducing the size of the bicycle in the length direction is achieved;

as shown in fig. 1, 3 and 4, the rear seat assembly 4 is rotated rearward and downward, and the front end of the stopper rod 10 is separated from the rear handle bar assembly 3;

rotating the rear handlebar assembly 3 backward and downward, separating the front channel steel 22 of the front seat assembly 2 from the front beam 51, rotating the rear outer bar 32 of the rear handlebar assembly 3, rotating the front seat assembly 2 and the front support frame 20 by 90 ° about a vertical axis, and then rotating the rear handlebar assembly 3 forward and downward about a horizontal axis until abutting against the front beam 51;

the upper turn lever 121 of the front handle bar assembly 1 is separated from the lower turn lever 122 and the upper turn lever 121 is rotated backward and downward, and the front handle bar is inserted into the front seat assembly 2, the down tube 201 and the crossbar 202 to form a triangular structure (specifically, depending on the size of the upper turn lever 121, the front handle bar is also inserted either to the rear side of the down tube 201 or to the front side of the crossbar 202). The bicycle can be folded from the unfolded state.

As shown in fig. 1 and 5, the rear wheel group 7 includes a left wheel 71 and a right wheel 72, and the left wheel 71 and the right wheel 72 are disposed at an interval in the left-right direction. The bicycle that this embodiment provided is by for the tricycle, and front wheel 8, left wheel 71 and right wheel 72 are located triangular three summits to can effectively avoid the bicycle to topple over, provide the guarantee for children's safety.

The rear wheel set 7 further includes a rear axle sleeve 73, the rear axle sleeve 73 is connected to the rear end of the rear beam 52, a rear rotating shaft 74 is disposed in the rear axle sleeve 73, and the left wheel 71 and the right wheel 72 are respectively connected to two ends of the rear rotating shaft 74. The left wheel 71 and the right wheel 72 are connected through a rear rotating shaft 74 to realize coaxial rotation, and the rear shaft sleeve 73 can reduce the exposure of rotating moving parts and improve the safety performance of the bicycle. In order to ensure that the left wheel 71 and the right wheel 72 rotate synchronously, it is preferable that one of the left wheel 71 and the right wheel 72 is a driving wheel, and the other is a driven wheel, i.e. one of the left wheel 71 and the right wheel 72 is fixedly connected with the rear rotating shaft 74, and the other is rotatably connected with the rear rotating shaft 74.

As shown in fig. 1, preferably, the rear support frame 30 is connected to the rear axle sleeve 73, in order to improve the stability of the rear portion of the bicycle, the rear support frame 30 includes a triangular support body and a top rod connected to the corner of the support body, the rear channel 302 is connected to the upper end of the top rod, the other two top corners of the support body are respectively connected to a bottom rod, and the lower end of the bottom rod is connected to the outer side of the rear axle sleeve 73.

As shown in fig. 5, to drive the rear wheel set 7 to rotate, the bicycle preferably further comprises a transmission system 9, and the transmission system 9 comprises a front sprocket 91, an intermediate sprocket set 92, a front chain 93, a rear sprocket 94 and a rear chain 95. The front sprocket 91 and the intermediate sprocket group 92 are rotatably provided to the beam frame 5 in the front-rear direction, respectively. The front chain 93 is in transmission connection with the front chain wheel 91 and the middle chain wheel set 92, the rear chain wheel 94 is sleeved outside the rear rotating shaft 74, and the rear chain 95 is in transmission connection with the middle chain wheel set 92 and the rear chain wheel 94.

Preferably, a front rotating shaft is rotatably disposed on the front beam 51, a front pedal is connected to each end of the front rotating shaft, and the front chain wheel 91 is fixed to the front rotating shaft and is located on one side of the front beam 51. The middle sprocket set 92 includes two left sprockets disposed on one side of the front beam 51, and the front chain 93 is drivingly connected to one of the left sprockets. To improve the rotational stability of the rear axle 74, the middle sprocket set 92 further includes a right sprocket on the other side of the front beam 51. Two rear chain wheels 94 are arranged on the rear rotating shaft 74 at intervals, two rear chains 95 are arranged, one rear chain 95 is in driving connection with one of the right chain wheel and the rear chain wheel 94, and the other rear chain 95 is in driving connection with the other left chain wheel and the other rear chain wheel 94.

To enable an adult to see the condition of the child at any time, the child sits on the front seat assembly 2 and the adult sits on the rear seat assembly 4. In order to make children can control the bicycle and turn to, reach the purpose of tempering children's controllability, front handlebar assembly 1 is connected with front wheel 8, and front handlebar assembly 1 rotates and can control front wheel 8 and turn to. To avoid the child from being able to avoid danger accurately and timely, in this embodiment, the adult sitting on the rear seat assembly 4 can also control the front wheel 8 to turn through the rear handlebar assembly 3, specifically, the front end of the steering system 6 is connected to the front handlebar assembly 1, and the rear end of the steering system 6 is connected to the rear handlebar assembly 3, so that the rear handlebar assembly 3 drives the front handlebar assembly 1 to rotate. The steering system 6 provided in this embodiment can make the rear handlebar assembly 3 rotate with the front handlebar assembly 1 synchronously, and the rear handlebar assembly 3 and the front handlebar assembly 1 can both control the bicycle to steer, thereby avoiding danger in time.

As shown in fig. 1, the rear handle bar assembly 3 further preferably includes a rear steering rod 33 and a rear handle bar body 34, the rear steering rod 33 is rotatably connected to the upper end of the rear outer rod 32, the rear handle bar body 34 is fixedly connected to the upper end of the rear steering rod 33, the rear handle bar body 34 includes a left handle and a right handle, and an adult sits on the rear seat assembly 4, and the left handle and the right handle are respectively held by the left hand and the right hand.

As shown in fig. 6, the steering system 6 includes a front fixing block 61, a left control assembly 62, and a right control assembly 63. The front fixing block 61 is connected to the front handlebar assembly 1, preferably, the front fixing block 61 includes a hoop 611 and a left insertion block 612 and a right insertion block 613 respectively disposed at two opposite sides of the hoop 611, the hoop 611 is sleeved on the front inner rod 12 of the front handlebar assembly 1, the hoop 611 rotates to drive the front inner rod 12 to rotate, and then the front inner rod 12 drives the front wheel 8 to turn, so as to steer the bicycle. The front end of the left control assembly 62 is connected to the left insertion block 612 of the front fixing block 61 and is located at the left side of the front handlebar assembly 1, and the rear end of the left control assembly 62 is connected to the left handle of the rear handlebar assembly 3. The front end of the right control assembly 63 is connected to the right insertion block 613 of the front fixing block 61 and is located at the right side of the front handlebar assembly 1, the rear end of the right control assembly 63 is connected to the right handle of the rear handlebar assembly 3, and the rear handlebar assembly 3 drives the front handlebar assembly 1 to rotate through the left control assembly 62 and the right control assembly 63.

Specifically, steering system 6 also includes a butt block 64, left control assembly 62 includes a left spring 621 and a left cable 622, and right control assembly 63 includes a right spring 631 and a right cable 632. The left cable 622 and the right cable 632 are preferably steel cables.

The butt joint block 64 is connected with the rear handlebar assembly 3, and the butt joint block 64 is provided with a left through hole and a right through hole which are arranged at intervals along the left-right direction.

The rear end of the left spring 621 abuts against the abutment block 64, and the front end of the left spring 621 abuts against the front fixing block 61 and is located on the left side of the front handlebar assembly 1. The rear end of the right spring 631 abuts the abutment block 64, and the front end of the right spring 631 abuts the front fixing block 61 and is located on the right side of the front handlebar assembly 1.

The left cable 622 is disposed through the left spring 621 and the left through hole, the rear end of the left cable 622 is connected to the left handle of the rear handlebar assembly 3, the front end of the left cable 622 is connected to the front fixing block 61, the left cable 622 is disposed on the left side of the front handlebar assembly 1, and preferably, the front end of the left cable 622 is disposed through the left insertion block 612 and fixedly connected to the left insertion block 612.

The right cable 632 is disposed through the right spring 631 and the right through hole, the rear end of the right cable 632 is connected to the right handle of the rear handlebar assembly 3, the front end of the right cable 632 is connected to the front fixing block 61, and the right cable 632 is located on the right side of the front handlebar assembly 1, preferably, the front end of the right cable 632 is disposed through the right insertion block 613 and is fixedly connected to the right insertion block 613.

Preferably, in order to shorten the length of the left spring 621 and the right spring 631 and avoid the left spring 621 and the right spring 631 bending during the bicycle turning process, the steering system 6 further comprises a left sleeve 623 and a right sleeve 633, the left sleeve 623 is located between the left spring 621 and the abutment block 64, and the left cable 622 is sequentially inserted through the left through hole, the left sleeve 623 and the left spring 621. The right sleeve 633 is positioned between the right spring 631 and the abutment block 64, and the right cable 632 is sequentially threaded through the right perforation, the right sleeve 633 and the right spring 631. The front fixing block 61 may be disposed inside the front outer rod 11, and the left cable 622 and the right cable 632 may be connected to the front fixing block 61 after passing through the rear outer rod 32 and the front beam 51. Alternatively, the front fixing block 61 may be fixedly connected to the upper rotating rod 121 or the lower rotating rod 122 and located outside the front outer rod 11, and the left cable 622 and the right cable 632 may be located outside the rear outer rod 32 and the front beam 51.

In the present embodiment, the working process and working principle of the steering system 6 are described by taking an example of controlling the left turn of the bicycle by an adult:

sit handlebar body 34 anticlockwise rotation behind adult's control of back seat subassembly 4, the left handle of back handlebar body 34 rotates to the direction of keeping away from handlebar assembly 1 promptly, the right handle of back handlebar body 34 rotates to the direction of being close to handlebar assembly 1, left spring 621 is stretched, right spring 631 is compressed, preceding fixed block 61 anticlockwise rotation, interior pole 12 anticlockwise rotation before preceding fixed block 61 drives, and then make preceding interior pole 12 drive front wheel 8 turn left, realize the turn left of self-call car.

The principle of the bicycle turning right and turning left is the same, and the description is omitted.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A bicycle, comprising: by preceding handlebar assembly (1), front seat subassembly (2), back handlebar assembly (3) and back seat subassembly (4) that set gradually after to, its characterized in that still includes:

a beam frame (5), wherein the front handlebar assembly (1), the front seat assembly (2), the rear handlebar assembly (3) and the rear seat assembly (4) are respectively connected with the beam frame (5), the beam frame (5) comprises a front beam (51) and a rear beam (52), and the front beam (51) is rotatably connected with the rear beam (52) so as to enable the bicycle to be in an unfolded state and a folded state;

steering system (6), the lower extreme of front handlebar subassembly (1) is connected with front wheel (8), front handlebar subassembly (1) is rotated and can be controlled front wheel (8) turn to, steering system's (6) the front end with front handlebar subassembly (1) is connected, steering system's (6) the rear end with back handlebar subassembly (3) are connected, so that back handlebar subassembly (3) can drive front handlebar subassembly (1) rotates.

2. Bicycle according to claim 1, characterized in that the steering system (6) comprises:

the front fixing block (61) is connected with the front handlebar assembly (1);

the front end of the left control assembly (62) is connected with the front fixing block (61) and is positioned on the left side of the front handlebar assembly (1), and the rear end of the left control assembly (62) is connected with the left handle of the rear handlebar assembly (3);

right control assembly (63), the front end of right side control assembly (63) with preceding fixed block (61) is connected, and is located the right side of preceding handlebar assembly (1), the rear end of right side control assembly (63) with the right handle of back handlebar assembly (3) is connected, back handlebar assembly (3) are passed through left side control assembly (62) with right side control assembly (63) drive preceding handlebar assembly (1) rotates.

3. The bicycle of claim 1, wherein a rear wheel set (7) is connected to a rear end of the rear beam (52), the rear wheel set (7) comprising:

a left wheel (71) and a right wheel (72) which are arranged at intervals in the left-right direction;

the rear axle sleeve (73) is connected to the rear end of the rear beam (52), a rear rotating shaft (74) is arranged in the rear axle sleeve (73), and the left wheel (71) and the right wheel (72) are respectively connected to two ends of the rear rotating shaft (74).

4. The bicycle according to claim 1, wherein the rear seat assembly (4) comprises a rear seat post (41), the rear seat post (41) being rotatably disposed to the front beam (51) in a fore-and-aft direction; the bicycle further comprises:

the rear support frame (30), the rear end of rear support frame (30) connect in back roof beam (52), the front end of rear support frame (30) detachably with back seat branch (41) are connected, back seat branch (41), back roof beam (52) with rear support frame (30) form the triangle-shaped structure.

5. The bicycle according to claim 4, characterized in that the rear seat strut (41) comprises an upper strut (411) and a lower strut (412) rotatably connected to enable the rear seat strut (41) to be folded; the lower end of the lower support rod (412) is rotatably connected with the front beam (51).

6. The bicycle of claim 1, wherein the lower end of the rear handlebar assembly (3) is connected to the front beam (51) in a forward and backward rotatable manner; the bicycle further comprises:

the one end of gag lever post (10) with back handlebar subassembly (3) with one fixed connection in back seat subassembly (4), the other end of gag lever post (10) with back handlebar subassembly (3) with another in back seat subassembly (4) can dismantle the connection.

7. The bicycle of claim 6, wherein the rear handlebar assembly (3) comprises:

the lower end of the rear inner rod (31) is rotatably connected with the front beam (51);

the rear outer rod (32) is sleeved outside the rear inner rod (31) and can rotate relative to the rear inner rod (31), the front seat assembly (2) is connected with the rear outer rod (32), and the lower end of the front seat assembly (2) is detachably connected with the front beam (51).

8. Bicycle according to any of claims 1 to 7, characterized in that the front seat assembly (2) comprises:

a front seat post (21), said front seat post (21) being connected to said rear handlebar assembly (3);

the lower end of the front seat support rod (21) is connected with the front channel steel (22), and the front channel steel (22) can be spliced with the front beam (51).

9. Bicycle according to claim 1, characterized in that the front handlebar assembly (1) comprises:

the front end of the front beam (51) is connected with the front outer rod (11);

interior pole (12) in the front, including setting up from top to bottom and rotating last bull stick (121) and lower bull stick (122) of connecting, just go up bull stick (121) can rotate extremely with the expansion position of lower bull stick (122) coaxial setting to and can rotate extremely with it is the folding position that angle set up to go up bull stick (121), bull stick (122) rotate down and wear to locate preceding outer pole (11), the lower extreme of lower bull stick (122) is connected with front wheel (8).

10. A bicycle according to claim 3, characterized in that the bicycle further comprises a transmission system (9), the transmission system (9) comprising:

a front chain wheel (91) and a middle chain wheel group (92) which are respectively arranged on the beam frame (5) in a rotating way along the front and back direction;

the front chain (93) is in transmission connection with the front chain wheel (91) and the middle chain wheel set (92);

the rear chain wheel (94) is sleeved outside the rear rotating shaft (74);

and the rear chain (95) is in transmission connection with the middle chain wheel set (92) and the rear chain wheel (94).

Images