WO2021249002A1

WO2021249002A1 - Bicycle

Info

Publication number: WO2021249002A1
Application number: PCT/CN2021/086065
Authority: WO
Inventors: 夏世光
Original assignee: 上海趣童工坊企业管理有限公司
Priority date: 2020-06-09
Filing date: 2021-04-09
Publication date: 2021-12-16
Also published as: CN111572688A

Abstract

Disclosed is a bicycle, comprising: a front handlebar assembly (1), a front seat assembly (2), a rear handlebar assembly (3) and a rear seat assembly (4) which are sequentially arranged from front to back; 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 to 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 to the rear beam (52) such that the bicycle can be in an unfolded state and a folded state; and a steering system (6), wherein the lower end of the front handlebar assembly (1) is connected to a front wheel (8), such that the steering of the front wheel (8) can be controlled by the rotation of the front handlebar assembly (1), and 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), such that the rear handlebar assembly (3) can drive the front handlebar assembly (1) to rotate.

Description

bike

This application claims the priority of the Chinese patent application whose application date is June 9, 2020 and the application number is 202010519341.5. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the technical field of vehicles, such as a bicycle.

Background technique

With the improvement of people's living standards, they pay more attention to the company of their children, and there are more activities such as taking children outings. Bicycles for double use in the related art generally use the front handlebar to control the direction, and the rear handlebar is not provided or the rear handlebar is fixed, and cannot be used to control the direction. Because children have poor ability to control bicycles and predict dangers, if a child sits in the front seat and drives the front handlebar to rotate, there is a great safety hazard in controlling the steering of the front wheel. If the adult sits in the front seat to control the direction and the child sits in the back seat, the adult cannot see the child in real time. When the child is in danger of falling, the adult cannot protect the child, and the child sitting in the back seat cannot exercise the child's control ability. In addition, due to the large size of the tandem bicycle, it is inconvenient to be carried to the suburbs, thereby affecting the use of users.

Summary of the invention

The present application provides a bicycle, which can improve the safety of the bicycle and make the bicycle easy to carry.

An embodiment provides a bicycle, including:

Front handlebar assembly, front seat assembly, rear handlebar assembly and rear seat assembly arranged in sequence from front to back;

Beam frame, the front handlebar assembly, the front seat assembly, the rear handlebar assembly and the rear seat assembly are respectively connected to the beam frame, wherein the beam frame includes a front beam and a rear beam, and the front The beam is rotatably connected with the rear beam, so that the bicycle can be in an unfolded state and a folded state;

A steering system, a front wheel is connected to the lower end of the front handlebar assembly, the front handlebar assembly can be rotated to control the steering of the front wheel, the front end of the steering system is connected with the front handlebar assembly, and the steering system The rear end is connected with the rear handlebar assembly, so that the rear handlebar assembly can drive the front handlebar assembly to rotate.

Description of the drawings

FIG. 1 is a schematic structural diagram of a bicycle in an unfolded state according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a bicycle in a folded state according to an embodiment of the present application;

FIG. 3 is a partial structural diagram of a bicycle in a folded state according to an embodiment of the present application;

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

FIG. 5 is a partial structural diagram of the bicycle in an unfolded state according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a bicycle steering system provided by an embodiment of the present application.

In the picture:

1. Front handlebar assembly; 11, front outer rod; 12, front inner rod; 121, upper turning rod; 122, lower turning rod;

2. Front seat assembly; 21. Front seat support rod; 22. Front channel steel;

3. Rear handlebar assembly; 31. Rear inner rod; 32. Rear outer rod; 33. Rear steering rod; 34. Rear handlebar body;

4. Rear seat assembly; 41. Rear seat support rod; 411, Upper support rod; 412, Lower support rod;

5. Beam frame; 51. Front beam; 511. Front shaft; 52. Rear beam;

6. Steering system;

61. Front fixed block; 611. Hood; 612, Left plug-in block; 613, Right plug-in block;

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

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

64. Abutment block;

7. Rear wheel group; 71, left wheel; 72, right wheel; 73, rear axle sleeve; 74, rear shaft;

8. Front wheel;

9. Transmission system; 91. Front chain wheel; 92. Middle chain wheel set; 93. Front chain; 94. Rear chain wheel; 95. Rear chain;

10. Limit rod; 101. Arc plate;

20. Front support frame; 201, diagonal bar; 202, cross bar;

30. Rear support frame; 301. Rear support frame body; 302. Rear channel steel;

40. Mounting frame.

detailed description

This application defines some position words. In the case of no explanation to the contrary, the position words used are "upper", "lower", "left", "right", "inner", and "outer". The words are used for ease of understanding, and therefore do not constitute a limitation on the protection scope of this application.

In this application, unless expressly stipulated and defined otherwise, the "above" or "below" of the first feature of the second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or merely indicating that the level of the first feature is higher than that of the second feature. The “below”, “below” and “below” of the second feature of the first feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In the description of this application, unless expressly stipulated and limited otherwise, the terms "connected", "connected", and "fixed" shall be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrated ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood under specific circumstances.

This embodiment provides a bicycle that can be used when adults and children are outings, but is not limited to this, and can also be used in other occasions to improve its safety and portability.

As shown in Figures 1 and 2, the bicycle provided by this embodiment includes a front handlebar assembly 1, a front seat assembly 2, a rear handlebar assembly 3, and a rear seat assembly 4 that are sequentially arranged from front to back, and also includes a beam frame 5 and In the steering system 6 (refer to FIG. 6), the front handlebar assembly 1, the front seat assembly 2, the rear handlebar assembly 3, and the rear seat assembly 4 are connected to the beam frame 5, respectively.

The beam frame 5 includes a front beam 51 and a rear beam 52. Optionally, the front handlebar assembly 1 is connected to the front end of the front beam 51, and the rear end of the rear beam 52 is connected to the rear wheel set 7. The front beam 51 and the rear beam 52 are rotatably connected to enable the bicycle to be in an unfolded state and a folded state. The length of the bicycle in the folded state can be reduced to facilitate the user to place the bicycle in the trunk of the car. Optionally, when the bicycle is in the unfolded state, the rear beam 52 is arranged approximately horizontally. When the bicycle is in the folded state from the unfolded state, the rear beam 52 rotates downward and forward about the horizontal axis. In this embodiment, the rear beam 52 is connected to The rear wheel set 7 of the rear beam 52 can rotate approximately 150°-170°, so that the size of the folded bicycle in the height direction will not increase. In one embodiment, the rotation angle of the rear beam 52 is not limited to this. As long as the rear beam 52 and the rear wheel set 7 do not interfere with other components such as the front beam 51, the rear beam 52 can rotate arbitrarily within a range of 180°. In other embodiments, when the bicycle enters the folded state from the unfolded state, the rear beam 52 rotates leftward, forward, or rightward and forward about the vertical axis, or the rear beam 52 rotates upward and forward about the horizontal axis. Exemplarily, the left-right direction is the left-right direction when the user is riding a bicycle, or the left-right direction when facing the bicycle.

Optionally, the front beam 51 and the rear beam 52 are rotatably connected by a middle rotating shaft. In one embodiment, the front beam 51 is provided with a central shaft hole, the central shaft is rotated through the central shaft hole, and both ends of the central shaft extend out of the central shaft hole. The rear beam 52 includes two beam plates arranged in parallel, and the two beam plates are respectively rotatably connected to the two ends of the protruding shaft hole of the middle rotating shaft.

As shown in FIGS. 1 and 2, the rear seat assembly 4 includes a rear seat support rod 41, and the rear seat support rod 41 is rotatably arranged on the front beam 51. Specifically, the rotation axis of the rear seat support rod 41 is parallel to the rotation axis of the rear beam 52, and the rear seat support rod 41 rotates forward and downward, thereby reducing the height of the bicycle. The rear seat assembly 4 may also include a rear seat, and the rear seat is connected to the upper end of the rear seat support rod 41.

In order to improve the stability of the rear seat assembly 4 when the bicycle is in the unfolded state and avoid the rear seat assembly 4 from rotating backwards and downwards during riding, the bicycle further includes a rear support frame 30, the rear end of which is connected to The rear beam 52, optionally, the rear end of the rear support frame 30 is connected to the rear beam 52 through the rear wheel set 7. The front end of the rear support frame 30 is detachably connected to the rear seat support rod 41, and the rear seat support rod 41, the rear beam 52 and the rear support frame 30 form a triangular structure. Optionally, the rear seat support rod 41 is inclined rearward, that is, the rear seat support rod 41 is arranged at an acute angle with the rear beam 52 and the rear support frame 30. On the one hand, the stability of the rear seat support rod 41 can be improved, and on the other hand, it can also This can prevent the rear wheel set 7 and the rear beam 52 from rotating when the bicycle passes the ditch.

As shown in Figures 1 and 2, optionally, the rear support frame 30 includes a rear support frame body 301 and a rear channel steel 302 connected to the front end of the rear support frame body 301. The rear seat support rod 41 can be inserted into the rear groove. In the steel 302, the detachable connection between the rear seat support rod 41 and the rear support frame 30 is realized. Optionally, the rear channel steel 302 includes a bottom plate and two side plates connected to both ends of the bottom plate. The bottom plate and the two side plates are connected to form a U-shaped channel steel. The rear seat support rod 41 is made of square steel. The seat support rod 41 and the rear channel steel 302 have a large contact area, thereby improving the stability of the connection between the rear seat support rod 41 and the rear channel steel 302. In other embodiments, the rear seat support rod 41 may also be a round tube.

As shown in Figure 2, optionally, the rear seat support rod 41 is rotatably connected to the front beam 51 through a mounting frame 40. The mounting frame 40 includes a bottom plate and two ear plates respectively connected to the left and right ends of the bottom plate. The bottom plate and the ear plates form a U Type structure. The lower side of the bottom plate is connected to the front beam 51, and the two lugs are provided with shaft holes at the positions directly opposite. 51's rotating connection.

As shown in Figures 1 and 2, optionally, the rear seat support rod 41 includes an upper support rod 411 and a lower support rod 412. The lower end of the lower support rod 412 is rotatably connected to the front beam 51, and the upper end of the upper support rod 411 is座连接。 Block connection. The upper support rod 411 and the lower support rod 412 are rotatably connected, so that the rear seat support rod 41 can be folded, and the length of the folded rear seat support rod 41 is reduced, thereby avoiding interference between the rear seat support rod 41 and the rear handlebar assembly 3 . In other embodiments, the rear seat support rod 41 may not be formed by connecting the upper support rod 411 and the lower support rod 412, but an integrated structure. When the bicycle is folded, the rear seat support rod 41 is integrally rotated forwards and downwards to achieve folding. .

As shown in Figure 1, Figure 3 and Figure 4, optionally, the lower end of the rear handlebar assembly 3 is rotatably connected to the front beam 51. In this embodiment, the rear handlebar assembly 3 can rotate around a horizontal axis. , It can also rotate around a vertical axis, where the horizontal axis is parallel to the rotation axis of the rear beam 52.

As shown in Figure 1, in order to restrict the rotation of the rear handlebar assembly 3 of the bicycle in the unfolded state around the horizontal axis, the bicycle further includes a limit rod 10, and the front end of the limit rod 10 is detachably connected to the rear handlebar assembly 3 to limit the position The rear end of the rod 10 is fixedly connected with the rear seat assembly 4. When folding the bicycle, the limit rod 10 is separated from the rear handlebar assembly 3, the restriction on the rear handlebar assembly 3 is cancelled, and the rear handlebar assembly 3 rotates forward and downward around the horizontal axis, thereby reducing in the height direction The size of the bicycle.

Optionally, the limit rod 10 includes a limit rod body and an arc plate 101 connected to the front end of the limit rod body. The arc plate 101 has an arc groove, and the arc groove can be inserted into the rear handlebar assembly 3. In other embodiments, the front end of the limit rod 10 may be fixedly connected with the rear handlebar assembly 3, and the rear end of the limit rod 10 may be detachably connected with the rear seat assembly 4.

As shown in FIG. 3, optionally, the rear handlebar assembly 3 is rotatably connected to the front beam 51 through another mounting frame 40, and the connecting shaft passes through the two axle holes and the lower end of the rear handlebar assembly 3, thereby realizing the rear handle The assembly 3 is connected to the rotation of the front beam 51.

As shown in Figures 1 and 3, in this embodiment, the lower end of the front seat assembly 2 is detachably connected to the front beam 51, and the rear handlebar assembly 3 rotates integrally with the front seat assembly 2, thereby increasing the folding and opening 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 forward and downward as a whole, the rear handlebar assembly 3 and the front seat assembly 2 first rotate backwards and downwards around the horizontal axis to make the front handlebar The assembly 1 is separated from the front beam 51, and then the rear handlebar assembly 3 is rotated to the left or right around the vertical axis, so that the front seat assembly 2 is located on the side of the front beam 51, and finally the rear handlebar assembly 3 and the front seat assembly 2 are wound around The horizontal axis rotates forward and downward about 180° to complete the folding of the rear handlebar assembly 3 and the front seat assembly 2. Optionally, in this embodiment, the rear handlebar assembly 3 rotates 90° around the vertical axis. When the bicycle is in the folded state, the length direction of the rear handlebar body 34 of the rear handlebar assembly 3 is consistent with the vertical direction. This reduces the size of the bicycle in the left-right direction.

Optionally, in order to enable the rear handlebar assembly 3 to rotate about a vertical axis, the rear handlebar assembly 3 includes a rear inner rod 31 and a rear outer rod 32, and the lower end of the rear inner rod 31 is rotatably connected with the front beam 51, exemplarily , The lower end of the rear inner rod 31 is rotatably connected with the rear beam 52 through the mounting frame 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 the vertical axis, the rear inner rod 31 does not rotate, and the rear outer rod 32 rotates around its own axis . Optionally, the front seat assembly 2 is connected to the rear outer rod 32, so that the front seat assembly 2 is driven to rotate while the rear outer rod 32 rotates.

Optionally, as shown in Figures 1 and 4, in order to ensure the stability of the front seat assembly 2 and the rear handlebar assembly 3, and to realize the connection between the front seat assembly 2 and the rear outer rod 32, the front seat assembly 2 is connected to the front support frame 20 The rear outer rod 32 is connected. The front support frame 20 includes a cross rod 202 and a diagonal rod 201. The front end of the cross rod 202 is connected to the front seat assembly 2, and the rear end of the cross rod 202 is connected to the rear outer rod 32 of the rear handlebar assembly 3. The upper end of the diagonal rod 201 is connected with the rear end of the cross rod 202 and the rear outer rod 32, and the lower end of the diagonal rod 201 is connected with the lower end of the front seat assembly 2. The front seat assembly 2, the diagonal rod 201 and the cross rod 202 form a triangular structure, and the front beam 51 , The rear handlebar assembly 3 and the diagonal rod 201 form a triangular structure.

Optionally, as shown in Figures 1 and 3, the front seat assembly 2 includes a front seat support rod 21 and a front channel steel 22. The front seat support rod 21 is connected to the rear handlebar assembly 3, and the upper end of the front seat support rod 21 is connected to the front seat. The lower end of the support rod 21 is connected with the front channel steel 22, and the front channel steel 22 can be inserted into the front beam 51. Optionally, the front channel steel 22 and the rear channel steel 302 have the same structure, the front beam 51 is a square tube, and the connection strength between the front channel steel 22 and the front beam 51 is high and easy to disassemble.

As shown in FIGS. 1 and 3, optionally, the front handlebar assembly 1 includes a front outer rod 11 and a front inner rod 12, and the front end of the front beam 51 is connected to the front outer rod 11. The front inner rod 12 includes an upper turning rod 121 and a lower turning rod 122 arranged up and down. The lower turning rod 122 is rotatably inserted into the front outer rod 11, and both ends of the lower turning rod 122 extend out of the front outer rod 11, and the lower turning rod 122 The lower end is connected to the front wheel 8. The upper turning rod 121 is rotatably connected with the upper end of the lower turning rod 122, the upper turning rod 121 can be rotated forward to an unfolding position coaxially arranged with the lower turning rod 122, and can be rotated backward to an angle arranged with the upper turning rod 121 The folding position, optionally, when the upper rotating rod 121 is vertically arranged, it is the working state, and when it is in the horizontal position, it is the folding position. The front handlebar assembly 1 of this structure can not only reduce the height of the front handlebar assembly 1, but also enable the front handlebar assembly 1 to control the direction of the front wheels 8.

Optionally, an upper locking member is connected to the lower end of the upper rotating rod 121, a lower locking member is connected to the upper end of the lower rotating rod 122, and the upper locking member and the lower locking member are connected or clamped by bolts to realize the upper The rotating rod 121 and the lower rotating rod 122 are detachably connected.

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

As shown in Figures 1 and 2, lift up the middle shaft, so that the rear beam 52 rotates downward and forward around the middle shaft, so that the rear channel steel 302 is separated from the rear seat assembly 4, and the rear beam 52 rotates to abut the front beam 51 , Complete the folding of the rear half of the self-proclaimed bicycle, and achieve the purpose of reducing the size of the bicycle in the length direction.

As shown in FIGS. 1, 3, and 4, the rear seat assembly 4 is rotated backward and downward, and the front end of the limit rod 10 is separated from the rear handlebar assembly 3.

The rear handlebar assembly 3 is rotated backward and downward, and the front channel steel 22 of the front seat assembly 2 is separated from the front beam 51, and the rear outer rod 32 of the rear handlebar assembly 3 is rotated to make the front seat assembly 2 and the front support frame 20 Rotate 90° around the vertical axis, and then rotate the rear handlebar assembly 3 forward and downward around the horizontal axis until it abuts the front beam 51.

Separate the upper turning rod 121 and the lower turning rod 122 of the front handlebar assembly 1, and rotate the upper turning rod 121 backwards and downwards. The front handlebar is inserted into the front seat assembly 2, the diagonal rod 201 and the cross rod 202 to form a triangular structure (Exemplarily, depending on the size of the upper turning rod 121, the front handlebar may also be inserted into the rear side of the diagonal rod 201 or the front side of the cross rod 202). The above can realize the bicycle from the unfolded state to the folded state.

As shown in FIGS. 1 and 5, the rear wheel set 7 includes a left wheel 71 and a right wheel 72, and the left wheel 71 and the right wheel 72 are spaced apart in the left-right direction. The bicycle route provided in this embodiment is a tricycle, and the front wheel 8, the left wheel 71, and the right wheel 72 are located on the three vertices of the triangle, so that the bicycle can be effectively prevented from overturning, and the safety of children can be guaranteed.

The rear wheel set 7 also includes a rear axle sleeve 73 which is connected to the rear end of the rear beam 52. The rear axle sleeve 73 is provided with a rear shaft 74. The left wheel 71 and the right wheel 72 are respectively connected to both ends of the rear shaft 74. The left wheel 71 and the right wheel 72 are connected by a rear shaft 74 to realize coaxial rotation. 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 the synchronous rotation of the left wheel 71 and the right wheel 72, optionally, one of the left wheel 71 and the right wheel 72 is a driving wheel, and the other is a driven wheel, that is, one of the left wheel 71 and the right wheel 72 is fixedly connected to the rear shaft 74 , The other is rotatably connected with the rear shaft 74.

As shown in Figure 1, optionally, the rear support frame 30 is connected to the rear axle sleeve 73. In order to improve the stability of the rear 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 steel 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 outside of the rear shaft sleeve 73.

As shown in Figure 5, in order to drive the rear wheel set 7 to rotate, optionally, the bicycle further includes a transmission system 9. The transmission system 9 includes a front sprocket 91, an intermediate sprocket 92, a front chain 93, a rear sprocket 94, and a rear sprocket. Chain 95. The front sprocket 91 and the intermediate sprocket group 92 are respectively rotatably arranged on the beam frame 5 in the front-rear direction. The front chain 93 is drivingly connected to the front sprocket 91 and the middle sprocket 92, the rear sprocket 94 is sleeved outside the rear rotating shaft 74, and the rear chain 95 is drivingly connected to the middle sprocket 92 and the rear sprocket 94.

Optionally, referring to FIG. 5, the front beam 51 is rotatably provided with a front rotating shaft 511, both ends of the front rotating shaft 511 are connected with front pedals, and the front sprocket 91 is fixed to the front rotating shaft 511 and is located on the first side of the front beam 51 side. The middle chain wheel set 92 includes two left chain wheels arranged on the first side of the front beam 51, and the front chain 93 is drivingly connected to one of the left chain wheels. In order to improve the rotational stability of the rear shaft 74, the intermediate sprocket set 92 further includes a right sprocket, and the right sprocket is located on the second side of the front beam 51. Two rear sprockets 94 are provided on the rear rotating shaft 74 at intervals, two rear chains 95 are provided, and the two rear chains 95 are drivingly connected to the two rear sprockets 94 in a one-to-one correspondence.

In order to allow adults 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 enable the child to control the steering of the bicycle and achieve the purpose of exercising the control ability of the child, the front handlebar assembly 1 is connected with the front wheel 8, and the front handlebar assembly 1 can control the steering of the front wheel 8 by rotating. In order to prevent children from being unable to avoid the danger accurately and in time, in this embodiment, an adult sitting on the rear seat assembly 4 can also control the steering of the front wheels 8 through the rear handlebar assembly 3. For example, the aforementioned steering system 6 The front end is connected with the front handlebar assembly 1, and the rear end of the steering system 6 is connected with 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 and the front handlebar assembly 1 rotate synchronously, and both the rear handlebar assembly 3 and the front handlebar assembly 1 can control the steering of the bicycle to avoid danger in time.

As shown in FIG. 1, optionally, the rear handlebar assembly 3 further includes a rear steering rod 33 and a rear handlebar body 34. The rear steering rod 33 is rotatably connected to the upper end of the rear outer rod 32, and the rear handlebar body 34 is connected to the rear steering rod 33. The upper end of the rear handlebar body 34 includes a left handle and a right handle. The adult sits on the rear seat assembly 4, and the left and right hands hold the left and right handles respectively.

As shown in FIG. 6, the steering system 6 includes a front fixed 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. Optionally, the front fixing block 61 includes a hoop 611 and a left inserting block 612 and a right inserting block 613 respectively arranged on opposite sides of the hoop 611. The hoop 611 It is sleeved on the front inner rod 12 of the front handlebar assembly 1, and the rotation of the hoop 611 can drive the front inner rod 12 to rotate, and the front inner rod 12 drives the front wheel 8 to steer to realize the steering of the bicycle. The front end of the left control assembly 62 is connected with the left plug-in block 612 of the front fixed block 61 and is located 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. The front end of the right control assembly 63 is connected with the right plug-in block 613 of the front fixing block 61 and is located on the right side of the front handlebar assembly 1, and the rear end of the right control assembly 63 is connected with the right handle of the rear handlebar assembly 3. The handlebar assembly 3 drives the front handlebar assembly 1 to rotate through the left control assembly 62 and the right control assembly 63.

In an embodiment, the steering system 6 further includes an abutment block 64, the left control assembly 62 includes a left spring 621 and a left cable 622, and the right control assembly 63 includes a right spring 631 and a right cable 632. The left cable 622 and the right cable 632 can be selected as steel wire ropes.

The abutment block 64 is connected to the rear handlebar assembly 3, and the abutment block 64 is provided with left and right perforations spaced in the left-right direction.

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

The left cable 622 passes through the left spring 621 and the left perforation, 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, and the left cable 622 It is located on the left side of the front handlebar assembly 1. Optionally, the front end of the left cable 622 passes through the left plug block 612 and is fixedly connected to the left plug block 612.

The right cable 632 passes through the right spring 631 and the right perforation, 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 Located on the right side of the front handlebar assembly 1, optionally, the front end of the right cable 632 passes through the right plug block 613 and is fixedly connected to the right plug block 613.

Optionally, in order to shorten the length of the left spring 621 and the right spring 631 and avoid bending of the left spring 621 and the right spring 631 during the steering process of the bicycle, optionally, the steering system 6 further includes 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 passes through the left through hole, the left sleeve 623 and the left spring 621 in sequence. The right sleeve 633 is located between the right spring 631 and the abutting block 64, and the right cable 632 passes through the right perforation, the right sleeve 633 and the right spring 631 in sequence. The front fixing block 61 may be arranged in 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 rod 121 or the lower 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 this embodiment, an adult controls a bicycle to turn left as an example to illustrate the working process and working principle of the steering system 6:

An adult sitting on the rear seat assembly 4 controls the rear handlebar body 34 to turn counterclockwise, that is, the left handle of the rear handlebar body 34 rotates away from the front handlebar assembly 1, and the right handle of the rear handlebar body 34 moves closer to the front car Rotate the direction of assembly 1, the left spring 621 is compressed, the right spring 631 is stretched, the front fixed block 61 rotates counterclockwise, the front fixed block 61 drives the front inner rod 12 to rotate counterclockwise, so that the front inner rod 12 drives the front wheel 8 Turn left to realize the left turn of the self-proclaimed car.

The principle of turning right and left of a bicycle is the same, so I won't repeat it here.

In the bicycle provided by the present application, the front beam 51 and the rear beam 52 are rotatably connected, so that the bicycle can be in an unfolded state and a folded state. In the trunk of the car, the bicycle is easy to carry. In order to enable the adult to see the condition of the child at any time, the child sits on the front seat assembly 2 to control the front handlebar assembly 1 and the adult sits on the rear seat assembly 4 to control the rear handlebar assembly 3. In order to enable the child to control the steering of the bicycle and achieve the purpose of exercising the control ability of the child, the front handlebar assembly 1 is connected with the front wheel 8, and the front handlebar assembly 1 can control the steering of the front wheel 8 by rotating. To prevent children from being unable to avoid the danger accurately and in time, 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. The adult sitting on the rear seat assembly 4 passes through the rear car The handle assembly 3 controls the front handlebar assembly 1 to rotate, realizes the synchronous movement of the front handlebar assembly 1 and the rear handlebar assembly 3, and then controls the steering of the front wheel 8 to realize the steering of the bicycle.

Claims

A bicycle including:

The front handlebar assembly (1), the front seat assembly (2), the rear handlebar assembly (3) and the rear seat assembly (4) are arranged in sequence from front to back;

Beam frame (5), 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) ) Connection, wherein the beam frame (5) includes a front beam (51) and a rear beam (52), and the front beam (51) is rotatably connected with the rear beam (52) so that the bicycle can be in an unfolded state And folded state;

A steering system (6), a front wheel (8) is connected to the lower end of the front handlebar assembly (1), the rotation of the front handlebar assembly (1) can control the steering of the front wheel (8), the steering system The front end of (6) is connected with the front handlebar assembly (1), and the rear end of the steering system (6) is connected with the rear handlebar assembly (3), so that the rear handlebar assembly (3) The front handlebar assembly (1) can be driven to rotate.
The bicycle according to claim 1, wherein the steering system (6) comprises:

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

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

Right control assembly (63). The front end of the right control assembly (63) is connected to the front fixing block (61) and is located on the right side of the front handlebar assembly (1). 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 through the left control assembly (62) and the right control assembly (63) The handlebar assembly (1) rotates.
The bicycle according to claim 1, wherein a rear wheel set (7) is connected to the rear end of the rear beam (52), and the rear wheel set (7) comprises:

The left wheel (71) and the right wheel (72) are arranged at intervals along the left and right directions of the rear beam (52);

The rear axle sleeve (73) is connected to the rear end of the rear beam (52), the rear axle (74) is arranged in the rear axle sleeve (73), the left wheel (71) and the right wheel (72) They are respectively connected to the two ends of the rear rotating shaft (74).
The bicycle according to claim 1, wherein the rear seat assembly (4) comprises a rear seat support rod (41), and the rear seat support rod (41) is rotatably arranged on the front beam (51) ; The bicycle also includes:

A rear support frame (30), the rear end of the rear support frame (30) is connected to the rear beam (52), and the front end of the rear support frame (30) is detachably connected to the rear seat support rod (41) In connection, the rear seat support rod (41), the rear beam (52) and the rear support frame (30) form a triangular structure.
The bicycle according to claim 4, wherein the rear seat support rod (41) includes an upper support rod (411) and a lower support rod (412) that are rotatably connected, so that the rear seat support rod (41) can Fold; the lower end of the lower support rod (412) is rotatably connected with the front beam (51).
The bicycle according to claim 1, wherein the lower end of the rear handlebar assembly (3) is rotatably connected to the front beam (51); the bicycle further comprises:

A limit rod (10), the first end of the limit rod (10) is fixedly connected to one of the rear handlebar assembly (3) and the rear seat assembly (4), and the limit rod ( The second end of 10) is detachably connected to the other of the rear handlebar assembly (3) and the rear seat assembly (4).
The bicycle according to claim 6, wherein the rear handlebar assembly (3) comprises:

A rear inner rod (31), 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) and the rear outer rod (32) Connected, the lower end of the front seat assembly (2) is detachably connected with the front beam (51).
The bicycle according to any one of claims 1-7, wherein the front seat assembly (2) comprises:

A front seat support rod (21), the front seat support rod (21) is connected to the rear handlebar assembly (3);

The front channel steel (22), 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 inserted into the front beam (51).
The bicycle according to claim 1, wherein the front handlebar assembly (1) comprises:

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

The front inner rod (12) includes an upper rod (121) and a lower rod (122) which are arranged up and down and rotatably connected, and the upper rod (121) can be rotated to be the same as the lower rod (122) The unfolding position set by the shaft and the folding position that can be rotated to an angle set with the upper rotating rod (121), the lower rotating rod (122) is rotatably penetrated in the front outer rod (11), and the The lower end of the lower rotating rod (122) is connected with the front wheel (8).
The bicycle according to claim 3, further comprising a transmission system (9), the transmission system (9) comprising:

The front sprocket (91) and the intermediate sprocket set (92) are respectively rotatably arranged on the beam frame (5) along the front and rear direction of the beam frame (5);

The front chain (93) is in transmission connection with the front sprocket (91) and the intermediate sprocket set (92);

The rear sprocket (94) is sleeved outside the rear shaft (74);

The rear chain (95) is drivingly connected with the intermediate sprocket set (92) and the rear sprocket (94).