WO2021114290A1

WO2021114290A1 - Family bicycle

Info

Publication number: WO2021114290A1
Application number: PCT/CN2019/125396
Authority: WO
Inventors: 谭建新; 胡恒芳; 谭智恩
Original assignee: 苏州锂智车业科技有限公司
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-06-17
Also published as: CN111148690B; CN111148690A

Abstract

A family bicycle, comprising a family bicycle main body (100). The family bicycle main body comprises a stroller assembly (10) and a bicycle assembly (20). A stroller frame (11) is connected to a first connecting vehicle tube (111) having a hollow structure. The bicycle assembly comprises a bicycle frame (21). The bicycle frame comprises a front fork (211), a rear fork (212), a second connecting vehicle tube (213) and a third connecting vehicle tube (214). The front fork is detachably connected to the second connecting vehicle tube. The third connecting vehicle tube is located between a second rear wheel (23) and a vehicle seat (24). The first connecting vehicle tube is, selectively, detachably connected to the second connecting vehicle tube, or detachably connected to the third connecting vehicle tube after the front fork is detached, such that the stroller assembly can be connected to the front end or rear end of the bicycle assembly. The stroller assembly is, selectively, detachably connected to the second connecting vehicle tube or the third connecting vehicle tube of the bicycle assembly by means of the first connecting vehicle tube, such that the stroller assembly can be selectively installed at the front end or rear end of the bicycle assembly according to the physical strength of the rider and the preference of the child.

Description

Mother and baby bicycle

Technical field

The invention relates to a bicycle, in particular to a bicycle for mothers and babies.

Background technique

Nowadays, as a means of transportation, bicycles or electric bicycles have been widely used in people's daily life. Most of them are popular means of transportation, which are convenient and low-cost. It is now common sense to install a rear seat on a bicycle or electric bicycle when traveling with children. However, it is inconvenient and unsafe to travel with a baby by bicycle or electric bicycle. Therefore, there are also baby seats installed at the front of bicycles or electric bicycles to carry babies. However, to install the baby seat on the front end of the car, it is very difficult for the rider to turn the handle, which requires the rider to require relatively good physical strength, and the scope of application is narrow.

Summary of the invention

In order to overcome the shortcomings of the prior art, an object of the present invention is to provide a mother-infant bicycle, including a stroller component and a bicycle component. The stroller component can be selectively installed in the bicycle according to the rider’s physical condition and the baby’s preferences. Describe the front or rear end of the bicycle component.

In order to achieve the above objectives, the present invention is achieved through the following technical solutions.

The present invention provides a mother and baby bicycle, including a mother and baby bicycle body, the mother and baby bicycle body including a stroller component and a bicycle component; wherein,

The stroller assembly includes a stroller frame, a baby seat, two first front wheels, two first rear wheels, and two push hands; the two first front wheels and the two first rear wheels are respectively arranged in the stroller At the front end and the rear end of the bottom of the frame, the two first front wheels and the two first rear wheels are all universal wheels; the stroller frame is connected with a first connecting tube having a hollow structure;

The bicycle assembly includes a bicycle frame, a second front wheel, a second rear wheel, a seat, and a driving mechanism for driving the bicycle assembly forward. The bicycle frame includes a front fork, a rear fork, and a second connecting car. Tube, the third connecting tube; the second front wheel and the second rear wheel are respectively rotatably connected to the front fork and the rear fork; the front fork is detachably connected to the second connecting tube , The third connecting tube is located between the second rear wheel and the seat;

The inclination angle of the second connecting tube and the third connecting tube are equal, and the inclination directions are opposite, and the bottom ends of the second connecting tube and the third connecting tube are located on the same horizontal line;

The first connecting trolley tube is selectively detachably connected to the second connecting trolley tube or detachably connected to the third connecting trolley tube after the front fork is removed, so as to connect the stroller assembly to the The front or rear end of a bicycle component.

Preferably, the number of the first connecting vehicle tubes is two, and the two first connecting vehicle tubes are arranged in parallel, and each is provided with a first through hole;

One ends of the third connecting vehicle tube and the second connecting vehicle tube are respectively provided with a first "U"-shaped structure and a second "U"-shaped structure, the first "U"-shaped structure and the second "U"-shaped structure Two first spring pin mechanisms and two second spring pin mechanisms that are matched with two first through holes are respectively provided; the spring pin mechanism includes a pin rod and a compression spring connected to one end of the pin rod;

The two first connecting tubes are selectively and detachably connected to the third connecting tube or the second connecting tube through the first through hole and the first or second spring pin mechanism.

Preferably, the stroller assembly further includes a scissor hydraulic lifting mechanism, the scissor hydraulic lifting mechanism includes a first fixing member, a second fixing member, a hydraulic cylinder, and a first scissor and a second scissor that are intersected and bolted to each other. Fork, the two ends of the hydraulic cylinder are respectively connected with the first scissor and the second scissor; the first fixing member has a frame structure; the top surface of the second fixing member is a plane for connection In the baby seat;

One end of the first scissor is rotatably connected to the second fixing member, and the other end is slidably connected to the inner wall of the first fixing member frame; one end of the second scissor is rotatably connected to the outer surface of the first fixing member , The other end is slidably connected to the second fixing member; the hydraulic cylinder drives the first scissor fork and the corresponding second scissor fork to swing crosswise to change the first fixing member and the second fixing member The spacing between pieces.

Preferably, the scissor hydraulic lifting mechanism further includes a first connecting member and a second connecting member; the number of the first scissor, the second scissor, and the hydraulic cylinder is two; The first scissor forks are arranged in parallel, and the two second scissor forks are arranged in parallel; the two ends of the first connecting piece are respectively connected to the center positions of the two first scissor forks, and the two ends of the second connecting piece are respectively connected to two On one end of the second scissor; both ends of the hydraulic cylinder are respectively connected to the first connecting piece and the second connecting piece.

Preferably, the scissor hydraulic lifting mechanism further includes two third fixing members respectively fixed on both sides of a surface of the baby carriage frame, the third fixing member is provided with a guide rail, and both sides of the baby seat are respectively provided There is a sliding block, and the infant seat is slidably connected to the third fixing parts on both sides through the sliding block to stabilize the infant seat.

Preferably, both ends of the front fork are respectively provided with a third "U"-shaped structure, and the two vehicle tubes of the third "U"-shaped structure are respectively provided with a second through hole for connecting with the third vehicle tube. Or the second connecting tube can be detachably connected.

Preferably, a first baffle and a second baffle are respectively provided at the front and rear of the stroller frame; the height of the first baffle is higher than the leg of the baby when the baby seat is at its highest for safety protection; The height of the second baffle is greater than half of the height of the second rear wheel, so as to prevent the dirt driven by the second rear wheel from polluting the baby seat when the second rear wheel rotates.

Preferably, the bicycle assembly further includes a handle and a rearview mirror, the rearview mirror is arranged close to the handle for allowing the bicycle to view the infant seat; the stroller assembly also includes a sunshade, so The sunshade umbrella is arranged at the top of the baby seat.

Preferably, the first connecting vehicle tube and the third connecting vehicle tube are further locked by a buckle structure.

Preferably, the guide rail is provided with a plurality of first convex teeth, and the slider is provided with a second convex tooth; the first convex teeth and the second convex teeth are symmetrically matched and are both triangular, and the first convex teeth The teeth are gradually smaller in the direction away from the scissor hydraulic lifting mechanism, and the second convex teeth are gradually larger in the direction away from the scissor hydraulic lifting mechanism, so that the sliding block is upward relative to the guide rail. The resistance of the movement is smaller than the resistance of the sliding block moving downward relative to the guide rail.

Compared with the prior art, the beneficial effect of the present invention is that in the mother and infant bicycle provided by the present invention, the stroller assembly is selectively detachably connected to the second connecting tube or the first connecting tube of the bicycle assembly through the first connecting tube. The three are connected to the bicycle tube, and the stroller assembly can be selectively installed at the front or rear end of the bicycle assembly according to the physical condition of the rider and the preference of the baby. In a preferred solution of the present invention, the baby seat provides a hydraulic scissor lift mechanism connected to the stroller frame, and the height of the baby seat can be adjusted at any time to be suitable for different usage scenarios such as roads or parks. Further, the baby seat is slidably arranged on the guide rail on the third fixing member on the baby carriage frame, and through the cooperation of the first convex tooth and the second convex tooth, the resistance of the baby seat moving upwards is less than that of the baby seat moving downwards. Resistance to avoid shocking the baby due to the sudden drop of the baby seat due to the failure of the hydraulic cylinder.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and can be implemented in accordance with the content of the description, some embodiments are used to describe in detail below. The specific implementation of the present invention is given in detail by the following examples.

Description of the drawings

The drawings described here are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is a schematic diagram of the structure of the mother and baby bicycle body of the present invention;

Figure 2 is a schematic diagram of the three-dimensional structure of the hydraulic scissor lift mechanism of the present invention;

3 is a schematic diagram of the three-dimensional structure of the stroller assembly of the present invention (the baby seat and the first baffle are not shown);

4 is a schematic diagram of the three-dimensional structure of the third connecting vehicle tube of the present invention;

Figure 5 is a three-dimensional schematic diagram of the buckle structure of the present invention;

Fig. 6 is a diagram of the matching relationship between the first convex tooth and the second convex tooth of the present invention;

In the picture:

100. Mother and baby bicycle body;

10. Stroller components; 11. Stroller frame; 111. First connecting tube; 12. Baby seat; 121. Second protruding teeth; 13. First front wheel; 14. First rear wheel; 15. Pushing hand 16. Hydraulic scissor lifting mechanism; 161, first fixing member; 162, second fixing member; 163, hydraulic cylinder; 164, first scissor; 165, second scissor; 166, first connecting member; 167 , The third fixing member; 1671, the guide rail; 1671a, the first convex tooth;

20. Bicycle components; 21. Bicycle frame; 211. Front fork; 213. Second connecting tube; 214. Third connecting tube; 2141. First pin; 22. Second front wheel; 23. Second Rear wheel; 24, seat; 25, driving mechanism; 251, foot pedal; 252, first sprocket; 253, second sprocket; 254, chain; 26, handle; 27, rearview mirror;

30. Buckle structure; 31. First buckle piece; 311. Clip hook; 32. Second buckle piece; 321. Clamping portion; 322. Rotating portion; 323. Fixed portion.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings. The foregoing and other objectives, features, aspects and advantages of the present invention will become more apparent, so that those skilled in the art can implement them with reference to the text of the description. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used in all the drawings to indicate the same or similar parts. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, and lower parts are based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the size from top to bottom, "width" corresponds to the size from left to right, and "depth" corresponds to the size from front to back. These relative terms are for convenience of description and are generally not intended to require a specific orientation. Terms related to attachment, coupling, etc. (for example, "connection" and "attachment") refer to the relationship in which these structures are directly or indirectly fixed or attached to each other through intermediate structures, and the movable or rigid attachment or relationship, unless Other ways are clearly stated.

In the following, the present invention will be further described with reference to the drawings and specific implementations. It should be noted that, provided that there is no conflict, the following embodiments or technical features can be combined to form new embodiments. .

As shown in Figures 1 and 3, the present invention provides a mother and baby bicycle, including a mother and baby bicycle body 100, the mother and baby bicycle body 100 includes a stroller assembly 10 and a bicycle assembly 20; wherein,

The stroller assembly 10 includes a stroller frame 11, a baby seat 12, two first front wheels 13, two first rear wheels 14, and two push hands 15. The baby seat 12 has a protective fence and a safety belt to fix the baby in the ride; The first front wheel 13 and the two first rear wheels 14 are respectively arranged at the front and rear ends of the bottom of the stroller frame 11, and the two first front wheels 13 and the two first rear wheels 14 All are universal wheels; the stroller frame 11 is connected with a first connecting tube 111 having a hollow structure;

The bicycle assembly 20 includes a bicycle frame 21, a second front wheel 22, a second rear wheel 23, a seat 24, and a driving mechanism 25 for driving the bicycle assembly 20 forward. The bicycle frame 21 includes a front fork. 211, a rear fork 212, a second connecting tube 213, and a third connecting tube 214; the second front wheel 22 and the second rear wheel 23 are rotatably connected to the front fork 211 and the rear fork 212, respectively; The front fork 211 is detachably connected to the second connecting tube 213, and the third connecting tube 214 is located between the second rear wheel 23 and the seat 24;

The second connecting vehicle pipe 213 and the third connecting vehicle pipe 214 have the same inclination angle and opposite inclination directions, and the bottom ends of the second connecting vehicle pipe 213 and the third connecting vehicle pipe 214 are located on the same horizontal line, So that the second connecting tube 213 or the third connecting tube 214 is connected to the stroller assembly 10 or the front fork 211, and the bottom ends of all wheels of the mother and baby bicycle body 100 are on the same horizontal line;

The first connecting trolley tube 111 is selectively detachably connected to the second connecting trolley tube 213 or the front fork 211 is detachably connected to the third connecting trolley tube 214 to connect the stroller assembly 10 is connected to the front or rear end of the bicycle assembly 20.

When the first connecting tube 111 is connected to the third connecting tube 214, at this time, the stroller assembly 10 is located at the rear end of the bicycle assembly 20, and further, the second rear wheel 23 Located between the two first rear wheels 14, the second rear wheel 23 will not touch the stroller assembly 10 when it rotates.

When the first connecting tube 111 is connected to the second connecting tube 213, at this time, the stroller assembly 10 is located at the front end of the bicycle assembly 20, and the removed front fork 211 is installed at all The third connecting tube 214 can carry the front fork 211 and the second front wheel 22 that have been removed.

The driving mechanism 25 includes a pedal 251, a first sprocket 252 connected to the pedal 251, a second sprocket 253 and a chain 254 arranged on the second rear wheel 23. The two ends of the chain 254 are respectively Connected to the first sprocket 252 and the second sprocket 253, the bicycle pedals the pedal 251 forcefully to make the first sprocket 252 rotate. Under the transmission connection of the chain 254, The second sprocket 253 is driven to rotate, and then the second rear wheel 23 is rotated, so that the mother and baby bicycle body 100 moves forward.

The number of the first connecting vehicle tube 111 is two, and the two first connecting vehicle tubes 111 are arranged in parallel, and each is provided with a first through hole 1111; as shown in FIG. 4, the third connecting vehicle tube 214, One end of the second connecting tube 213 (not shown in the figure) is respectively provided with a first "U"-shaped structure and a second "U"-shaped structure, the first "U"-shaped structure and the second "U"-shaped structure The structure is respectively provided with two first spring pin mechanisms and two second spring pin mechanisms that cooperate with the two first through holes; that is, the two first spring pin mechanisms are respectively provided on the two vehicles of the first "U"-shaped structure. On the tube, two second spring pin mechanisms are respectively arranged on the two vehicle tubes of the second "U"-shaped structure;

The two first connecting vehicle tubes 111 cooperate with the first or spring pin mechanism through the first through holes to be selectively and detachably connected to the third connecting vehicle tube 214 or the second connecting vehicle tube 213. The spring pin mechanism includes a pin rod and a compression spring connected to one end of the pin rod. The first spring pin mechanism includes a first pin rod 2141 and a first compression spring connected to one end of the first pin rod 2141. The first spring pin mechanism is disposed on the third connecting tube 214. In the first groove (not shown in the figure); when there is no external pressure, one end of the first pin 2141 protrudes out of the first groove, and protrudes out of the first groove under external pressure When one end of the first pin 2141 is outside, the first compression spring is compressed, and the first pin 2141 is retracted into the first groove. Insert the third connecting tube 214 into the hollow structure of the first connecting tube 111, and under the pressure of the inner wall of the first connecting tube 111, the exposed end of the first pin 2141 of the third connecting tube 214 retracts In the first groove, when encountering the first through hole 1111, when there is no external force, the first pin 2141 is pressed, and the first pin 2141 extends into the first through hole under the elastic force of the first compression spring, thereby causing the first pin 2141 to extend into the first through hole. A connecting tube 111 is connected to the third connecting tube 214. When the stroller assembly 10 needs to be removed, press the exposed end of the first pin 2141 and simultaneously pull the first connecting tube 111 away from the third connecting tube 214, the first pin 2141 The first compression spring is pressed back under the pressure of the inner wall of the first through hole and the external force, the first compression spring is compressed, and the first pin 2141 is retracted to the first groove Inside, the stroller assembly 10 is separated from the rear end of the bicycle assembly 20. Similarly, the second spring pin mechanism includes a second pin rod and a second compression spring connected to one end of the second pin rod, and the second spring pin mechanism is provided on the second connecting tube 213 corresponding to In the second groove (not shown in the figure). The detachable connection of the first connecting tube 111 and the second connecting tube 213 is the same as the detachable connection between the first connecting tube 111 and the third connecting tube 214. I won't repeat it again.

As shown in FIG. 2, the stroller assembly 10 also includes a scissor hydraulic lifting mechanism 16. The scissor hydraulic lifting mechanism 16 includes a first fixing member 161, a second fixing member 162, a hydraulic cylinder 163, which cross each other and are bolted to each other. The first scissor 164 and the second scissor 165 of the hydraulic cylinder 163 are respectively connected to the first scissor 164 and the second scissor 165 at both ends; the first fixing member 161 is in a frame structure ; The top surface of the second fixing member 162 is a flat surface for connecting to the baby seat;

One end of the first scissor 164 is rotatably connected to the second fixing member 162, and the other end is slidably connected to the inner wall of the frame of the first fixing member 161; one end of the second scissor 165 is rotatably connected to the first fixing member 161. The outer surface of the fixing member 161 is slidably connected to the second fixing member 162 at the other end; the hydraulic cylinder 163 drives the first scissor 164 and the corresponding second scissor 165 to cross swing to change the first scissor 165 The distance between a fixing member 161 and the second fixing member 162.

Further, a first sliding groove (not shown in the figure) is respectively provided on two opposite inner walls of the frame of the first fixing member 161, and a second sliding groove is respectively provided on both sides of a surface of the second fixing member 162 (Not shown in the figure), the outer surface of one end of the first scissor 164 is provided with a first bump (not shown in the figure), and the outer surface of one end of the second scissor 165 is provided with a second bump (Not shown in the figure); the two first scissor forks 164 are slidably connected to the sliding grooves on both sides of the first fixing member 161 through the first protrusions, and the two second scissor forks 165 pass through The second protrusion is slidably connected to the sliding grooves on both sides of the second fixing member 162.

The scissor hydraulic lifting mechanism 16 further includes a first connecting piece 166 and a second connecting piece; the number of the first scissor 164, the second scissor 165, and the hydraulic cylinder 163 is two; two; The first scissor forks 164 are arranged in parallel, and the two second scissor forks 165 are arranged in parallel; the two ends of the first connecting piece 166 are respectively connected to the center positions of the two first scissor forks 164, and the second connecting piece The two ends are respectively connected to one ends of the two second scissor forks 165; the two ends of the hydraulic cylinder 163 are respectively connected to the first connecting piece 166 and the second connecting piece.

The stroller assembly 10 also includes a control assembly and a switch. The hydraulic cylinder 163 and the switch are respectively electrically connected to the control assembly to control the opening or closing and raising or lowering of the hydraulic scissor lifting mechanism 16 .

The scissor hydraulic lifting mechanism 16 also includes two third fixing members 167 respectively fixed on two sides of a surface of the baby carriage frame 11, the third fixing members 167 are provided with a guide rail 1671, and the baby seat 12 is two The sides are respectively provided with sliders (not shown in the figure), and the infant seat 12 is slidably connected to the third fixing members 167 on both sides through the sliders, so as to provide a guide on both sides of the infant seat 12 Fixed to further stabilize the baby seat 12.

The distance between the first fixing member 161 and the second fixing member 162 is adjusted by the scissor hydraulic lifting mechanism 16, thereby adjusting the height of the baby seat 12 relative to the ground, which can be applied to different Use scenarios. When used on a highway, due to the flying dust on the ground and the diffusion of car exhaust, the baby seat 12 is raised to protect the baby from pollutants; when used in the park, the baby seat 12 is lowered , In order to bring the baby closer to nature.

The two ends of the front fork 211 are respectively provided with a third "U"-shaped structure, the two tubes of the third "U"-shaped structure are respectively provided with a second through hole, the two second through holes and the first spring pin mechanism or The second spring pin mechanism is matched to be detachably connected with the third connecting tube 214 or the second connecting tube 213.

The stroller frame 11 is provided with a first baffle 17 and a second baffle 18 respectively at the front and rear; the height of the first baffle 17 is higher than that of the baby’s legs when the baby seat 12 is at its highest for safety Protection. Further, the first baffle 18 is a metal piece with strong firmness. The height of the second baffle 18 is greater than half of the height of the second rear wheel 23 to prevent the dirt driven by the second rear wheel 23 from polluting the baby seat 12 when the second rear wheel 23 rotates. Further, considering that the splashed mud is not hindered from the detachable connection of the first connecting tube 111 and the third connecting tube 214, the height of the second baffle 18 is as high as The top quarter of the second rear wheel 23.

The bicycle assembly 20 also includes a handle 26 and a rear-view mirror 27. The rear-view mirror 27 is arranged close to the handle 26. Using optical principles, the rear-view mirror 27 is arranged to allow the bicycle to pass through when riding. The rearview mirror 27 can clearly see the position of the baby seat 12, so that the bicycle can view the baby seat 12; the stroller assembly also includes a parasol 19, which is arranged on the infant The top of the seat 12.

As shown in FIG. 5, the first connecting vehicle tube 111 and the third connecting vehicle tube 214 are further locked by the buckle structure 30. The buckle structure 30 includes a first buckle member 31 and a second buckle member 32. The first buckle member 31 and the second buckle member 32 are respectively disposed on the first connecting tube 111 and the The third connection is on the vehicle tube 214. The first fastener 31 is provided with a snap hook 311; the second snap 32 includes a snap portion 321, a rotating portion 322, and a fixed portion 323. The rotating portion 322 is connected to the snap portion 321 respectively. , The fixed portion 323 is connected, the fixed portion 323 is fixed on the outer surface of the third connecting tube 214, the rotating portion 322 rotates to change the distance between the clamping portion 321 and the card structure 311 Then, after the clamping portion 321 is clamped to the clamping hook 311, the rotating portion 322 rotates to be fixed, and the clamping portion 321 clamps the clamping hook 311 so that the first fastener 31 and the second buckle 32 are firmly clamped. This further ensures that the stroller assembly 10 and the bicycle assembly 20 are firmly connected to ensure the safety of the baby.

As shown in Figure 1, Figure 3, Figure 6, the guide rail 1671 is provided with a plurality of first convex teeth 1671a, the slider is provided with a second convex tooth 121; the first convex teeth 1671a and the second convex teeth The teeth 121 are symmetrically matched and are triangular in shape. The first convex teeth 1671a are gradually smaller in the direction away from the scissor hydraulic lifting mechanism 16, and the second convex teeth 121 are directed away from the scissor hydraulic lifting mechanism 16. The direction is gradually enlarged, so that the resistance of the slider relative to the rail 1671 moving upward is smaller than the resistance of the slider relative to the rail 1671 moving downward. This is to prevent the baby seat 12 from sliding down too fast when the hydraulic cylinder 163 fails, which may scare the baby.

It should be understood that the maternal and infant bicycle provided by the present invention may also be an electric bicycle, which can realize manual or electric riding, and the specific electric driving adopts the existing known technology, which will not be repeated here.

Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. For those skilled in the art, it can be easily Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the embodiments shown here.

Claims

A maternal and infant bicycle, comprising a maternal and infant bicycle body (100), characterized in that the maternal and child bicycle body (100) includes a stroller component (10) and a bicycle component (20); wherein,

The stroller assembly (10) includes a stroller frame (11), a baby seat (12), two first front wheels (13), two first rear wheels (14), and two pushers (15); The front wheel (13) and the two first rear wheels (14) are respectively arranged at the front and rear ends of the bottom of the stroller frame (11), and the two first front wheels (13) and the two second A rear wheel (14) is a universal wheel; the stroller frame (11) is connected with a first connecting tube (111) having a hollow structure;

The bicycle assembly (20) includes a bicycle frame (21), a second front wheel (22), a second rear wheel (23), a seat (24), and a drive for driving the bicycle assembly (20) forward The mechanism (25), the bicycle frame (21) includes a front fork (211), a rear fork (212), a second connecting tube (213), and a third connecting tube (214); the second front wheel (22) The second rear wheel (23) is rotatably connected to the front fork (211) and the rear fork (212); the front fork (211) is detachably connected to the second connecting tube (213), the third connecting tube (214) is located between the second rear wheel (23) and the seat (24);

The second connecting tube (213) and the third connecting tube (214) have the same inclination angle and opposite inclination directions, the second connecting tube (213) and the third connecting tube (214) The bottom ends of are on the same horizontal line;

The first connecting tube (111) is selectively detachably connected to the second connecting tube (213) or detachably connected to the third connecting tube (214) after the front fork (211) is removed , To connect the stroller assembly (10) to the front or rear end of the bicycle assembly (20).
The mother-and-child bicycle according to claim 1, wherein the number of the first connecting tube (111) is two, and the two first connecting tubes (111) are arranged in parallel, and both are provided with a first connecting tube (111). Through hole (1111);

One ends of the third connecting tube (214) and the second connecting tube (213) are respectively provided with a first "U"-shaped structure and a second "U"-shaped structure. The two "U"-shaped structures are respectively provided with two first spring pin mechanisms and two second spring pin mechanisms that cooperate with the two first through holes; the spring pin mechanism includes a pin rod and a compression spring connected to one end of the pin rod;

The two first connecting tubes (111) cooperate with the first or second spring pin mechanism through the first through holes to be selectively detachably connected to the third connecting tube (214) or the second connecting tube Tube (213).
The mother and baby bicycle according to claim 1, wherein the stroller assembly (10) further comprises a scissor hydraulic lifting mechanism (16), and the scissor hydraulic lifting mechanism (16) comprises a first fixing member (161) , The second fixing member (162), the hydraulic cylinder (163), the first scissor (164) and the second scissor (165) that cross each other and are connected to each other. The two ends of the hydraulic cylinder (163) are connected to the The first scissor (164) and the second scissor (165) are connected; the first fixing member (161) is in a frame structure; the top surface of the second fixing member (162) is a plane for Connected to the baby seat (12);

One end of the first scissor (164) is rotatably connected to the second fixing member (162), and the other end is slidably connected to the inner wall of the frame of the first fixing member (161); the second scissor (165) One end is rotatably connected to the outer surface of the first fixing member (161), and the other end is slidably connected to the second fixing member (162); the hydraulic cylinder (163) drives the first scissor (164) and Correspondingly, the second scissor fork (165) swings crosswise to change the distance between the first fixing member (161) and the second fixing member (162).
The mother-and-child bicycle according to claim 3, characterized in that the scissor hydraulic lifting mechanism (16) further comprises a first connector (166) and a second connector; the first scissor (164), The number of the second scissor (165) and the hydraulic cylinder (163) are both two; the two first scissor (164) are arranged in parallel, and the two second scissor (165) are arranged in parallel; The two ends of the first connecting member (166) are respectively connected to the center positions of the two first scissor forks (164), and the two ends of the second connecting member are respectively connected to one end of the two second scissor forks (165) On; the two ends of the hydraulic cylinder (163) are respectively connected to the first connecting piece (166), the second connecting piece.
The mother and baby bicycle according to claim 3, characterized in that the scissor hydraulic lifting mechanism (16) further comprises two third fixing members ( 167), the third fixing member (167) is provided with a guide rail (1671), the baby seat (12) is provided with sliders on both sides, and the baby seat (12) is slidably connected to the The third fixing member (167) is used to stabilize the baby seat (12).
The mother-and-child bicycle according to claim 2, wherein the two ends of the front fork (211) are respectively provided with a third "U"-shaped structure, and the two tubes of the third "U"-shaped structure are respectively provided with The second through hole is used for detachably connecting with the third connecting tube (214) or the second connecting tube (213).
The mother-and-child bicycle according to claim 3, characterized in that a first baffle (17) and a second baffle (18) are respectively provided at the front and rear of the stroller frame (11); the first baffle The height of (17) is higher than that of the baby's legs when the baby seat (12) is at its highest for safety protection; the height of the second baffle (18) is greater than half of the second rear wheel (23) The height is used to prevent the dirt driven by the second rear wheel (23) from polluting the baby seat (12) when the second rear wheel (23) rotates.
The mother and baby bicycle according to claim 1, characterized in that the bicycle assembly (20) further comprises a handle (26), a rearview mirror (27), and the rearview mirror (27) is arranged close to the handle (26) side for viewing the baby seat (12) by the riding bicycle; the stroller assembly also includes a sunshade (19), the sunshade (19) is arranged at the top of the baby seat (12) .
The mother and baby bicycle according to claim 1, wherein the first connecting tube (111) and the third connecting tube (214) are further locked by a buckle structure (30).
The mother and baby bicycle according to claim 5, wherein the guide rail (1671) is provided with a plurality of first convex teeth (1671a), and the sliding block is provided with a second convex tooth (121); The convex teeth (1671a) are symmetrically matched with the second convex teeth (121) and are both triangular, and the first convex teeth (1671a) are gradually smaller in the direction away from the scissor hydraulic lifting mechanism (16), The second convex teeth (121) are gradually enlarged toward the direction away from the scissor hydraulic lifting mechanism (16), so that the upward movement resistance of the sliding block relative to the guide rail (1671) is smaller than that of the sliding block The resistance to the downward movement of the guide rail (1671).