Child tricycle

Abstract

The utility model relates to the technical field of baby carriages and discloses a child tricycle which comprises a supporting frame, a front wheel assembly and a rear wheel assembly, and the front wheel assembly is arranged at the front end of the supporting frame and provided with a front wheel. The rear wheel assembly comprises a first rear wheel frame and a second rear wheel frame, the first end of the first rear wheel frame is rotationally connected to the rear end of the supporting frame through a first shaft, and the first end of the second rear wheel frame is rotationally connected to the rear end of the supporting frame through a second shaft. The first shaft and the second shaft integrally extend in the vertical direction; the rear wheel assembly has a folded state and an unfolded state, and in the folded state, the first rear wheel frame and the second rear wheel frame rotate to be close to the supporting frame and are oppositely located on the two sides of the supporting frame; in the unfolded state, the first rear wheel frame and the second rear wheel frame rotate in the direction away from the supporting frame and rotate to the rear side of the supporting frame. According to the child tricycle convenient to fold, the size of the folded child tricycle in the length direction is shortened, the occupied space is reduced, and a user can conveniently carry and store the child tricycle.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of baby carriage, especially to a child tricycle. BACKGROUND

[0002] With the improvement of people's living standards, baby carriage has become an indispensable product in the growth process of children. Baby carriage generally includes tricycle and bicycle, when children are small, they generally ride tricycle when playing to ensure safety because of insufficient balance ability; when children grow up, they are generally not interested in tricycle, but more willing to ride bicycle.

[0003] Most of the existing child tricycles cannot be folded, even if some can be folded, the operation is also more troublesome when folding, and the folding structure is relatively complex, and the folding effect is not ideal, and there is still a problem of large volume after folding.

[0004] In addition, due to the single function of the existing child tricycle, it is necessary to purchase child tricycle and child bicycle at different growth stages of children, which not only increases the economic pressure of parents, but also needs to provide enough space for storage. Moreover, the use form of the existing child tricycle is usually fixed and cannot be adjusted, which cannot meet the different riding needs of children.

[0005] Therefore, there is an urgent need for a child tricycle to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0006] Based on the above, the purpose of the utility model is to provide a child tricycle, which is convenient to fold, can shorten the size along the length direction after folding, reduce the occupied space, and is convenient for users to carry and store.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The child tricycle comprises:

[0009] A support frame;

[0010] A front wheel assembly is arranged at the front end of the support frame and has a front wheel;

[0011] A rear wheel assembly comprises a first rear wheel frame and a second rear wheel frame, a first end of the first rear wheel frame is rotatably connected to the rear end of the support frame through a first shaft, and a first end of the second rear wheel frame is rotatably connected to the rear end of the support frame through a second shaft; the first shaft and the second shaft are integrally arranged along the vertical direction;

[0012] The rear wheel assembly has a folded state and an unfolded state. In the folded state, the first rear wheel frame and the second rear wheel frame are rotated to be close to the support frame and are located on the two sides of the support frame respectively. In the unfolded state, the first rear wheel frame and the second rear wheel frame are rotated to be away from the support frame and are located on the rear side of the support frame.

[0013] In some possible embodiments, the rear wheel assembly further comprises a first rear wheel arranged on the first rear wheel frame and a second rear wheel arranged on the second rear wheel frame.

[0014] The distance between the first rear wheel frame and the second rear wheel frame is adjustable to change between the first use state and the second use state.

[0015] In the first use state, the first rear wheel frame and the second rear wheel frame are close to each other, and the first rear wheel and the second rear wheel are close to each other to form a rear wheel group, and the rear wheel group and the front wheel are arranged in the front-rear direction.

[0016] In the second use state, the first rear wheel frame and the second rear wheel frame are symmetrically arranged on the two sides of the support frame, and the first rear wheel, the second rear wheel and the front wheel are arranged in a triangular shape as a whole.

[0017] In some possible embodiments, the rear wheel assembly further comprises a first rear wheel mounting seat and a second rear wheel mounting seat, the first rear wheel is rotatably arranged on the first rear wheel mounting seat, the second rear wheel is rotatably arranged on the second rear wheel mounting seat, the first rear wheel mounting seat is rotatably arranged on the first rear wheel frame through a first rear wheel rotating shaft, and the second rear wheel mounting seat is rotatably arranged on the second rear wheel frame through a second rear wheel rotating shaft.

[0018] The first rear wheel rotating shaft and the second rear wheel rotating shaft are arranged in the vertical direction as a whole, so that in the first use state, the first rear wheel can be rotated to the inner side of the first rear wheel frame, and the second rear wheel can be rotated to the inner side of the second rear wheel frame; in the second use state, the first rear wheel can be rotated to the outer side of the first rear wheel frame, and the second rear wheel can be rotated to the outer side of the second rear wheel frame.

[0019] In some possible embodiments, in the first use state, the free end surface of the first rear wheel and the free end surface of the second rear wheel are attached to each other.

[0020] In the folded state, the first rear wheel can be rotated to the outer side of the first rear wheel frame, and the second rear wheel can be rotated to the outer side of the second rear wheel frame, and the free end surface of the first rear wheel and the free end surface of the second rear wheel are away from each other.

[0021] In some possible embodiments, two sides of the rear end of the support frame are respectively fixed with a first rear wheel frame mounting seat and a second rear wheel frame mounting seat, the first rear wheel frame is rotatably connected to the first rear wheel frame mounting seat through the first shaft, and the second rear wheel frame is rotatably connected to the second rear wheel frame mounting seat through the second shaft.

[0022] In some possible embodiments, the first rear wheel frame mounting seat is provided with a pair of connecting plates oppositely arranged thereon, one end of each connecting plate is fixed to the support frame, and the other end of each connecting plate extends away from the support frame, and the first shaft is rotatably mounted between the two connecting plates.

[0023] The child tricycle further has a locking structure, which comprises a lock tongue movably arranged on the connecting plate and a plurality of lock grooves arranged on the first shaft, and the position of the first rear wheel frame relative to the support frame can be locked through cooperation of the lock tongue and the lock grooves.

[0024] In some possible embodiments, the first rear wheel frame can rotate within a range of 180 degrees around the first shaft; and / or,

[0025] the second rear wheel frame can rotate within a range of 180 degrees around the second shaft; and / or,

[0026] the first rear wheel can rotate within a range of 180 degrees around the first rear wheel rotation shaft; and / or,

[0027] the second rear wheel can rotate within a range of 180 degrees around the second rear wheel rotation shaft.

[0028] In some possible embodiments, the child tricycle further comprises a handle assembly arranged at the front end of the support frame, the handle assembly comprises a steering shaft and a handle, the handle is arranged at the upper end of the steering shaft, the steering shaft passes through the front end of the support frame and is connected to the front wheel assembly, a joint is arranged between the upper part and the lower part of the steering shaft, the joint is fixed to the lower part of the steering shaft, the upper part of the steering shaft is rotatably connected to the joint through a third shaft, and the handle and the upper part of the steering shaft can be rotated towards the support frame to be folded.

[0029] In some possible embodiments, a seat is further arranged on the support frame, the front and rear positions of the seat on the support frame are adjustable; and / or, the child tricycle further comprises a pedal, and the pedal is located close to the front wheel.

[0030] In some possible embodiments, a driving assembly is further included, and the driving assembly is drivingly connected to at least one of the front wheel, the first rear wheel and the second rear wheel.

[0031] The utility model discloses a beneficial effect:

[0032] The utility model provides a child tricycle, simple structure, through the first rear wheel frame and the second rear wheel frame to the mutual approach of forward rotation, can conveniently fold the child tricycle, effectively shortens its size along the length direction, reduces its occupied space, and the user carries and accomodates storage.

[0033] When the first rear wheel frame and the second rear wheel frame rotate and open to both sides, can be used as tricycle, thereby providing enough stability for the riding of young children, when the first rear wheel frame and the second rear wheel frame rotate to the mutual approach to the rear, can be used as two-wheeled vehicle, can exercise the balance of children, the child tricycle realizes the function of one car two -use, is applicable to the different stages of children's growth, saves the purchase cost of family.

[0034] And, through the rotation of the first rear wheel frame and the second rear wheel frame, the interval between the first rear wheel and the second rear wheel can be adjusted, so that the child tricycle can be used in various forms to meet the different riding needs of children and improve the riding experience of children. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is the structural schematic diagram of the child tricycle (in three -wheel wide wheel track state) provided by the utility model embodiment;

[0036] Figure 2 It is the bottom view of Figure 1 ;

[0037] Figure 3 It is the structural schematic diagram of the child tricycle (when adjusting seat) provided by the utility model embodiment;

[0038] Figure 4 It is the structural schematic diagram of the child tricycle (in three -wheel narrow wheel track state) provided by the utility model embodiment;

[0039] Figure 5 It is the bottom view of Figure 4 ;

[0040] Figure 6 It is the structural schematic diagram of the child tricycle (in two -wheel state) provided by the utility model embodiment;

[0041] Figure 7 It is the bottom view of Figure 6 ;

[0042] Figure 8 It is the structural schematic diagram of the child tricycle (in folding state) provided by the utility model embodiment;

[0043] Figure 9 It is the bottom view of Figure 8Figure 2 is a bottom view of the device of Figure 1.

[0044] Figure 1 is a perspective view of the device of the present application.

[0045] 1 support frame; 11 first rear wheel frame mount; 12 second rear wheel frame mount; 13 connecting rod; 2 front wheel; 3 handlebar assembly; 31 steering shaft; 32 handlebar; 33 swivel joint; 34 third shaft; 4 first rear wheel frame; 41 first shaft; 42 first rear wheel mount; 5 second rear wheel frame; 51 second shaft; 52 second rear wheel mount; 6 first rear wheel; 61 first rear wheel axle; 7 second rear wheel; 71 second rear wheel axle; 8 seat; 9 pedal. DETAILED DESCRIPTION

[0046] The utility model will be described in further detail below in connection with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0047] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0048] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0049] In the description of this utility model, the terms "upper," "lower," "left," and "right," etc., regarding orientations or positions, are based on the orientations or positions shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0050] This embodiment provides a children's tricycle to address the problems of existing children's tricycles, which have limited functionality, are non-adjustable, and are inconvenient to fold. It should be noted that in this embodiment, "front" refers to the front of the children's tricycle in its travel direction, "rear" refers to the rear of the children's tricycle in its travel direction, "left" refers to the left side when the child is riding facing forward, and "right" refers to the right side when the child is riding facing forward.

[0051] like Figures 1 to 9 As shown, the children's tricycle provided in this embodiment includes a support frame 1, a front wheel assembly, a rear wheel assembly and an armrest assembly 3. The support frame 1 extends along the front and rear directions of the vehicle body and is the main supporting component of the frame. Optionally, the support frame 1 is made of metal pipe fittings to improve its structural strength and reduce weight. The front end of the support frame 1 is provided with a connecting rod 13 extending in the vertical direction, and the connecting rod 13 and the support frame 1 are in a "T" shape. In this embodiment, the connecting rod 13 is also made of metal pipe fittings, and the connecting rod 13 and the support frame 1 can be fixed by welding or made by one-piece processing. The armrest assembly 3 is arranged at the front end of the support frame 1, and the armrest assembly 3 includes a steering shaft 31 and a handle 32. The handle 32 is arranged at the upper end of the steering shaft 31. The steering shaft 31 passes through the connecting rod 13 from top to bottom and is connected to the front wheel assembly for driving the front wheel assembly to steer. The front wheel assembly is arranged at the front end of the support frame 1. Specifically, the front wheel assembly includes a front fork, a baffle and a front wheel 2 . The front fork is fixedly connected to the steering shaft 31 . The front wheel 2 is rotatably connected to the front fork. The baffle is connected to the front fork and blocks the upper side of the front wheel 2 .

[0052] The rear wheel assembly includes a first rear wheel frame 4 and a second rear wheel frame 5. The first rear wheel frame 4 extends obliquely downward from the rear end of the support frame 1. The first end of the first rear wheel frame 4 is rotatably connected to the left side of the rear end of the support frame 1 via a first shaft 41 to enable the first rear wheel frame 4 to rotate forward or backward relative to the support frame 1; the second end of the first rear wheel frame 4 is connected to the first rear wheel 6. The second rear wheel frame 5 extends obliquely downward from the rear end of the support frame 1. The first end of the second rear wheel frame 5 is rotatably connected to the right side of the rear end of the support frame 1 via a second shaft 51 to enable the second rear wheel frame 5 to rotate forward or backward relative to the support frame 1; the second end of the second rear wheel frame 5 is connected to the second rear wheel 7. In this embodiment, the first shaft 41 and the second shaft 51 are both arranged to extend in the vertical direction.

[0053] The rear wheel assembly of the present embodiment has a folded state and an unfolded state. In the folded state (as shown in Figures 8-9 ), the first rear wheel frame 4 and the second rear wheel frame 5 are respectively rotated forward to approach the support frame 1 and are located on the two sides of the support frame 1. In the unfolded state (as shown in Figures 1-7 ), the first rear wheel frame 4 and the second rear wheel frame 5 are rotated away from the support frame 1 and are located on the rear side of the support frame 1. The children's tricycle provided by the present embodiment has a simple structure. By rotating the first rear wheel frame 4 and the second rear wheel frame 5 forward to approach each other, the children's tricycle can be conveniently folded, the length of the children's tricycle is effectively shortened, the space occupied by the children's tricycle is reduced, and the user can conveniently carry and store the children's tricycle.

[0054] Further, the distance between the first rear wheel frame 4 and the second rear wheel frame 5 is adjustable to change between the first use state and the second use state. In the first use state, the first rear wheel frame 4 and the second rear wheel frame 5 are rotated rearward to approach each other, and the first rear wheel 6 and the second rear wheel 7 are combined to form a rear wheel group, which is arranged along the front-rear direction together with the front wheel 2, i.e., the children's tricycle is in a two-wheel state (as shown in Figures 6-7 ) at this time. When riding, the balance of the child can be exercised. In the second use state, the first rear wheel frame 4 and the second rear wheel frame 5 are symmetrically arranged on the two sides of the support frame 1, and the first rear wheel 6, the second rear wheel 7, and the front wheel 2 are arranged in a triangular shape as a whole, i.e., the children's tricycle is in a three-wheel state (as shown in Figures 1-5 ) at this time. When riding, sufficient stability can be provided for the riding of young children. Therefore, the children's tricycle of the present embodiment realizes a dual-purpose function, is suitable for different stages of growth of children, and saves the purchase cost of the family. Moreover, when the children's tricycle is in the three-wheel state, by simultaneously rotating the first rear wheel frame 4 and the second rear wheel frame 5 forward or rearward, the distance between the first rear wheel 6 and the second rear wheel 7 can be adjusted (as shown in the wide wheelbase state in Figures 1-3 and the narrow wheelbase state in Figures 4-5 ), so that the children's tricycle can be used in various forms to meet different riding needs of children and improve the riding experience of children.

[0055] Optionally, the rear wheel assembly further comprises a first rear wheel mounting seat 42 and a second rear wheel mounting seat 52. The first rear wheel mounting seat 42 is rotatably mounted to the second end of the first rear wheel frame 4 through a first rear wheel rotating shaft 61, and the first rear wheel 6 is rotatably mounted to the first rear wheel mounting seat 42. The first rear wheel rotating shaft 61 extends along the vertical direction, so that the first rear wheel 6 can be smoothly turned between the inner side and the outer side of the first rear wheel frame 4. The second rear wheel mounting seat 52 is rotatably mounted to the second end of the second rear wheel frame 5 through a second rear wheel rotating shaft 71, and the second rear wheel 7 is rotatably mounted to the second rear wheel mounting seat 52. The second rear wheel rotating shaft 71 extends along the vertical direction, so that the second rear wheel 7 can be smoothly turned between the inner side and the outer side of the second rear wheel frame 5. Specifically, in the first use state (i.e., when the child tricycle is in the two-wheel state), the first rear wheel 6 is turned to the inner side of the first rear wheel frame 4, the second rear wheel 7 is turned to the inner side of the second rear wheel frame 5, and the free end face of the first rear wheel 6 and the free end face of the second rear wheel 7 are mutually attached. This is conducive to reducing the width of the rear wheel group formed by the first rear wheel 6 and the second rear wheel 7 when the child tricycle is in the two-wheel state, and improving the comfort and flexibility when riding in the two-wheel state. In the second use state (i.e., when the child tricycle is in the three-wheel state), the first rear wheel 6 is turned to the outer side of the first rear wheel frame 4, and the second rear wheel 7 is turned to the outer side of the second rear wheel frame 5, so as to improve the stability of the support. Further, when the child tricycle is in the folded state, the first rear wheel 6 is turned to the outer side of the first rear wheel frame 4, the second rear wheel 7 is turned to the outer side of the second rear wheel frame 5, and the free end face of the first rear wheel 6 and the free end face of the second rear wheel 7 are mutually away. This can further reduce the volume of the child tricycle after folding, reduce the space occupied, and facilitate the user to store and carry.

[0056] In the embodiment, the first rear wheel frame 4, the second rear wheel frame 5, the first rear wheel 6 and the second rear wheel 7 can all rotate horizontally around their respective axes without changing the height position. Optionally, the first rear wheel frame 4 rotates around the first axis 41 within an angle range of 180 degrees, and the second rear wheel frame 5 rotates around the second axis 51 within an angle range of 180 degrees. This arrangement provides sufficient space for the front and rear rotation of the first rear wheel frame 4 and the second rear wheel frame 5, ensuring that after rotating to the rear, the three-wheel state and the two-wheel state can be switched, and after rotating to the front, the folding of the tricycle can be realized. Further, the first rear wheel 6 rotates around the first rear wheel rotating shaft 61 within an angle range of 180 degrees, so as to ensure that the first rear wheel 6 can be smoothly turned between the inner side and the outer side of the first rear wheel frame 4. At the same time, the second rear wheel 7 rotates around the second rear wheel rotating shaft 71 within an angle range of 180 degrees, so as to ensure that the second rear wheel 7 can be smoothly turned between the inner side and the outer side of the second rear wheel frame 5.

[0057] The left side of the rear end of the support frame 1 is fixed with a first rear wheel frame mounting seat 11, and the first rear wheel frame 4 is rotatably connected to the first rear wheel frame mounting seat 11 through a first shaft 41. Meanwhile, the right side of the rear end of the support frame 1 is fixed with a second rear wheel frame mounting seat 12, and the second rear wheel frame 5 is rotatably connected to the second rear wheel frame mounting seat 12 through a second shaft 51. In this way, the structure is simple, the connection is reliable, and the stability of the relative rotation between the first rear wheel frame 4 and the second rear wheel frame 5 is ensured. Specifically, the first rear wheel frame mounting seat 11 has a pair of connecting plates oppositely arranged, one end of the connecting plate is fixed to the support frame 1, the other end of the connecting plate extends away from the support frame 1, and the first shaft 41 is rotatably installed between the two connecting plates. The second rear wheel frame mounting seat 12 has the same structure as the first rear wheel frame mounting seat 11, and will not be described here.

[0058] Further, the first rear wheel frame mounting seat 11 is also provided with a locking structure, which includes a lock tongue movably arranged on the connecting plate and a plurality of lock grooves arranged on the first shaft 41. The position of the first rear wheel frame 4 relative to the support frame 1 can be locked by the cooperation of the lock tongue and the lock groove. Similarly, the second rear wheel frame mounting seat 12 is also provided with a locking structure for locking the position of the second rear wheel frame 5 relative to the support frame 1. By arranging the above-mentioned locking structure, the stability of the position of the first rear wheel frame 4 and the second rear wheel frame 5 during riding is ensured, and the riding safety is improved. In addition, the first rear wheel mounting seat 42 is also provided with a locking structure for locking the position of the first rear wheel 6 relative to the first rear wheel frame 4; the second rear wheel mounting seat 52 is also provided with a locking structure for locking the position of the second rear wheel 7 relative to the second rear wheel frame 5, so as to ensure the stability of the position of the first rear wheel 6 and the second rear wheel 7 during riding, and improve the riding safety.

[0059] It should be noted that the above-mentioned locking structure can be realized by using a pin, a buckle, a toothed part or other structures capable of limiting the rotation of the shaft in the prior art, and the present embodiment does not limit the same.

[0060] In the present embodiment, the handrail assembly 3 is a foldable structure. Specifically, a joint 33 is arranged between the upper part and the lower part of the steering shaft 31, the joint 33 is fixed to the lower part of the steering shaft 31, and the upper part of the steering shaft 31 is rotatably connected to the joint 33 through a third shaft 34, so that the handle 32 and the upper part of the steering shaft 31 can be rotated towards the support frame 1 to realize folding. Preferably, the third shaft 34 extends in the horizontal direction and is perpendicular to the support frame 1. By folding the handrail assembly 3 towards the support frame 1, the size of the child tricycle after folding is further reduced, and the storage space is saved.

[0061] In the embodiment, the support frame 1 is further provided with a seat 8 for the child to sit on. The seat 8 is fixedly connected to the support frame 1 by fasteners (such as bolts, nuts, etc.), and has a simple structure and stable and reliable connection. Further, the seat 8 is adjustable in position along the front-rear direction on the support frame 1, so as to meet the riding requirements of children of different ages and heights on the tricycle and improve the use flexibility of the tricycle.

[0062] Further, the child tricycle of the embodiment further comprises a pedal 9 located close to the front wheel 2. Specifically, the pedal 9 can be arranged at the lower part of the front end of the support frame 1, in which case the pedal 9 can be used only for placing the child's feet, and the tricycle is driven to travel by a big person pushing or by an electric drive when in use; or the pedal 9 can also be connected to the two sides of the wheel shaft of the front wheel 2 as a footrest mechanism, and the tricycle is driven to travel by the child pedaling.

[0063] Optionally, the child tricycle of the embodiment further comprises a drive assembly drivingly connected with at least one of the front wheel 2, the first rear wheel 6 and the second rear wheel 7. By arranging the drive assembly, when the child does not want to ride or has difficulty in riding, the drive assembly is used to drive the child tricycle to move forward, which is convenient to use and improves the riding experience. Optionally, the front wheel 2 in the embodiment is an electric drive wheel, which is arranged such that the front wheel 2 has both steering and driving functions, making it very convenient to steer at large and small angles, and flexible, stable and reliable in steering, and does not require structures such as transmission bars and differentials, facilitating independent design of the first rear wheel 6 and the second rear wheel 7, simplifying the structure and reducing energy consumption. Further, the drive assembly of the embodiment comprises a motor, a battery and a drive switch. The motor is connected with the front wheel 2 for driving the front wheel 2 to rotate. The drive switch is arranged on the handle assembly 3 for controlling the opening and closing of the drive assembly. The battery is used to provide electric energy for the motor and the drive switch. Further, the pedal 9 is further provided with an acceleration mechanism for controlling the speed of the child tricycle and a brake mechanism for braking.

[0064] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to exhaust all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model claim.

Claims

1. A child's tricycle characterised in that, The utility model relates to a folding bicycle, comprising: a support frame; a front wheel assembly arranged at a front end of the support frame and having a front wheel; a rear wheel assembly including a first rear wheel frame and a second rear wheel frame, a first end of the first rear wheel frame being rotatably connected to a rear end of the support frame via a first shaft, and a first end of the second rear wheel frame being rotatably connected to the rear end of the support frame via a second shaft, the first shaft and the second shaft being arranged in an overall vertical direction; the rear wheel assembly having a folded state and an unfolded state, in the folded state, the first rear wheel frame and the second rear wheel frame are respectively rotated to be close to the support frame and oppositely located on two sides of the support frame, and in the unfolded state, the first rear wheel frame and the second rear wheel frame are rotated away from the support frame and to the rear side of the support frame.

2. The child tricycle of claim 1, wherein, the rear wheel assembly further includes a first rear wheel arranged on the first rear wheel frame and a second rear wheel arranged on the second rear wheel frame; a distance between the first rear wheel frame and the second rear wheel frame is adjustable to change between a first use state and a second use state; in the first use state, the first rear wheel frame and the second rear wheel frame are close to each other, and the first rear wheel and the second rear wheel are close to each other to form a rear wheel set, and the rear wheel set and the front wheel are arranged in a front-rear direction; in the second use state, the first rear wheel frame and the second rear wheel frame are symmetrically arranged on two sides of the support frame, and the first rear wheel, the second rear wheel and the front wheel are arranged in a triangular shape as a whole.

3. The child tricycle of claim 2, wherein, the rear wheel assembly further includes a first rear wheel mounting seat and a second rear wheel mounting seat, the first rear wheel is rotatably mounted to the first rear wheel mounting seat, and the second rear wheel is rotatably mounted to the second rear wheel mounting seat, the first rear wheel mounting seat is rotatably mounted to the first rear wheel frame via a first rear wheel rotating shaft, and the second rear wheel mounting seat is rotatably mounted to the second rear wheel frame via a second rear wheel rotating shaft; the first rear wheel rotating shaft and the second rear wheel rotating shaft are arranged in an overall vertical direction, so that in the first use state, the first rear wheel can be rotated to an inner side of the first rear wheel frame, and the second rear wheel can be rotated to an inner side of the second rear wheel frame, and in the second use state, the first rear wheel can be rotated to an outer side of the first rear wheel frame, and the second rear wheel can be rotated to an outer side of the second rear wheel frame.

4. The child tricycle of claim 3, wherein, in the first use state, a free end surface of the first rear wheel and a free end surface of the second rear wheel are attached to each other; in the folded state, the first rear wheel can be rotated to an outer side of the first rear wheel frame, and the second rear wheel can be rotated to an outer side of the second rear wheel frame, and the free end surface of the first rear wheel and the free end surface of the second rear wheel are away from each other.

5. The child tricycle of claim 1, wherein the rear end of the support frame is fixed with a first rear wheel frame mounting seat and a second rear wheel frame mounting seat on two sides respectively, the first rear wheel frame is rotatably connected to the first rear wheel frame mounting seat via the first shaft, and the second rear wheel frame is rotatably connected to the second rear wheel frame mounting seat via the second shaft.

6. The child's tricycle of claim 5, wherein The first rear wheel frame mounting seat has a pair of connecting plates arranged oppositely, one end of the connecting plates is fixed to the support frame, the other end of the connecting plates extends away from the support frame, and the first shaft is rotatably installed between the two connecting plates; The child tricycle further has a locking structure, the locking structure includes a lock tongue movably arranged on the connecting plate and a plurality of lock slots arranged on the first shaft, and the position of the first rear wheel frame relative to the support frame can be locked through cooperation of the lock tongue and the lock slots.

7. The child tricycle of claim 3, wherein The first rear wheel frame can rotate within a range of 180 degrees around the first shaft; and / or, The second rear wheel frame can rotate within a range of 180 degrees around the second shaft; and / or, The first rear wheel can rotate within a range of 180 degrees around the first rear wheel rotating shaft; and / or, The second rear wheel can rotate within a range of 180 degrees around the second rear wheel rotating shaft.

8. The child tricycle of claim 1, wherein, The child tricycle further includes a handrail assembly arranged at the front end of the support frame, the handrail assembly includes a steering shaft and a handle, the handle is arranged at the upper end of the steering shaft, the steering shaft passes through the front end of the support frame and is connected with the front wheel assembly, an adapter is arranged between the upper part and the lower part of the steering shaft, the adapter is fixed to the lower part of the steering shaft, the upper part of the steering shaft is rotatably connected with the adapter through a third shaft, and the handle and the upper part of the steering shaft can be rotated towards the support frame to be folded.

9. The child tricycle of claim 1, wherein, The support frame further has a seat arranged thereon, the seat can be adjusted in position in front and back directions on the support frame; and / or, the child tricycle further includes a pedal, and the pedal is arranged close to the front wheel.

10. The child tricycle of claim 2, wherein, The child tricycle further includes a driving assembly, and the driving assembly is drivingly connected with at least one of the front wheel, the first rear wheel and the second rear wheel.

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