Trolley

Abstract

The utility model belongs to the technical field of children products, and particularly discloses a cart. According to the cart, the push rod assembly is used for a user to push the cart, the supporting piece is arranged between the push rod assembly and one of the first wheel assembly and the second wheel assembly, the cart frame can be folded, the size of the cart can be reduced, and meanwhile one end of the cart frame is connected to the first wheel assembly or the second wheel assembly connected with the supporting piece in a rotating mode around the first shaft. When the cart frame is folded, the cart frame rotates around the first shaft and is close to the supporting piece, the size of the folded cart is further reduced, the cart does not occupy space, the operation steps of folding the cart are simplified, and folding operation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to children's articles technical field especially push car. BACKGROUND

[0002] Children's push car provides great convenience for adults to carry smaller children to go out, so children's push car gradually becomes a necessity for adults to carry children to go out. Children's push car usually has a frame, a front wheel assembly, a rear wheel assembly, a seat and a push rod on the frame, children sit on the seat, and parents control the push car to walk by pushing the push rod. In the prior art, in order to facilitate the storage of the push car, the push car is usually designed as a foldable structure, but the folding operation of the push car in the prior art is relatively troublesome, and it is not convenient to fold, and the size of the folded push car cannot be minimized. SUMMARY

[0003] The utility model discloses a push car, which simplifies the operation steps of folding the push car, facilitates folding operation, and minimizes the size of the folded push car.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] A push car includes a frame, a push rod assembly movably arranged on the frame, a first wheel assembly arranged at one end of the frame, and a second wheel assembly arranged at the other end of the frame. A support is connected between the push rod assembly and one of the first wheel assembly and the second wheel assembly. The frame is foldable. One end of the frame is rotatably connected to the first wheel assembly or the second wheel assembly connected with the support around a first shaft. When the frame is folded, the frame rotates around the first shaft and approaches the support.

[0006] As an optional technical scheme of the above push car, the support is connected between the push rod assembly and the first wheel assembly. A first end of the support is connected with the first wheel assembly at one end of the frame. A second end of the support is connected with the push rod assembly at the other end of the frame. One end of the frame is rotatably connected to the first wheel assembly around a first shaft.

[0007] As an optional technical scheme of the above push car, the frame includes a bottom frame and a connecting assembly. One end of the bottom frame is rotatably connected to the first wheel assembly around a first shaft. The connecting assembly is connected to the other end of the bottom frame. The push rod assembly is movably connected to the connecting assembly. The connecting assembly is foldable. When the connecting assembly is folded, the bottom frame is driven to rotate around the first shaft and approach the support.

[0008] As an optional technical scheme of the above-mentioned stroller, the connecting assembly comprises a connecting rod and a damping assembly, one end of the damping assembly is rotationally connected with the chassis, the other end is rotationally connected with the connecting rod, the push rod assembly is movably connected with the connecting rod, and when the connecting assembly is folded, the connecting rod and the damping assembly are close to each other.

[0009] The opposite sides of the chassis are respectively provided with holding members, one end of each holding member is rotationally connected with the chassis, a cross rod is arranged between each holding member and the corresponding connecting rod, one end of the cross rod is rotationally connected with the corresponding holding member, and the other end of the cross rod, the connecting rod and the damping assembly are rotationally connected at a point, and when the frame is folded, the holding members and the cross rods are close to each other.

[0010] As an optional technical scheme of the above-mentioned stroller, the first end of the support member is fixedly connected with the first wheel assembly; and / or,

[0011] A first support sleeve is arranged on the first wheel assembly, the first end of the support member passes through the first support sleeve, and the support member is connected with the first wheel assembly; and / or,

[0012] The connecting assembly is rotationally connected with the second end of the support member around a second axis, when the frame is folded, the connecting assembly is folded and rotates relative to the support member around the second axis, driving the frame to close to the support member around the first axis; and / or,

[0013] A second support sleeve that rotates around the second axis is arranged on the connecting assembly, the second end of the support member passes through the second support sleeve and is connected with the push rod assembly, when the frame is folded, the connecting assembly is folded and rotates relative to the support member around the second axis, driving the frame to close to the support member around the first axis; and / or,

[0014] When the frame is unfolded, the support member can swing relative to the frame to drive the frame to turn.

[0015] As an optional technical scheme of the above-mentioned stroller, the first end of the support member is drivingly connected with one of the first wheel assembly and the second wheel assembly, the second end of the support member is connected with the push rod assembly, and when the push rod assembly moves, the first wheel assembly or the second wheel assembly connected with the support member can be driven to turn by the support member.

[0016] As an optional technical scheme of the above-mentioned stroller, a first linkage member is arranged between the first wheel assembly and the second wheel assembly, and when one of the first wheel assembly and the second wheel assembly connected with the support member is steered, the first linkage member can drive the other one of the first wheel assembly and the second wheel assembly to be steered synchronously; and / or,

[0017] The support member can swing relative to the frame to drive the first wheel assembly or the second wheel assembly to steer.

[0018] As an optional technical scheme of the above-mentioned stroller, the first end of the support member is in transmission connection with the first wheel assembly.

[0019] The first wheel assembly comprises a connecting frame and two first wheels, the connecting frame is rotationally connected with one end of the frame about the first shaft, the two first wheels are rotationally arranged on the connecting frame respectively, a first linkage rod is arranged between the two first wheels, the two ends of the first linkage rod are rotationally connected with the two first wheels respectively, a transmission gear is arranged on the first linkage rod along the extending direction of the first linkage rod, a gear shaft is movably connected with the first end of the support member, a gear is connected with the gear shaft, the gear shaft is rotationally connected with the connecting frame, and the gear is in mesh with the transmission gear; and / or,

[0020] A support sleeve is arranged on the first wheel assembly or the second wheel assembly or the frame, the support member passes through the support sleeve and is in transmission connection with the first wheel assembly or the second wheel assembly, and the support member can swing in the first direction relative to the support sleeve.

[0021] As an optional technical scheme of the above-mentioned stroller, the first end of the support member is in transmission connection with the first wheel assembly.

[0022] The second wheel assembly comprises two second wheels, the first linkage member comprises a second linkage rod arranged between the two second wheels, the two ends of the second linkage rod are rotationally connected with the two second wheels respectively, a third linkage rod is arranged between the second linkage rod and the first wheel assembly, and the two ends of the third linkage rod are rotationally connected with the first wheel assembly and the second linkage rod respectively.

[0023] As an optional technical scheme of the above-mentioned stroller, the push rod assembly is movably connected with the support member, and the push rod assembly can be folded relative to the support member.

[0024] The push rod assembly and the first wheel assembly are connected with the support member, the support member extends obliquely from one end of the frame to the upper rear of the other end of the frame, and a seat frame is arranged on the support member.

[0025] The seat frame comprises a seat plate and a backrest arranged at an angle with the seat plate.

[0026] The support member comprises a first support part, a second support part and a third support part connected in sequence, the first support part is connected with the first wheel assembly, the second support part is in L-shaped structure, the third support part is connected with the push rod assembly, a horizontal part of the second support part supports the seat plate, and a vertical part of the second support part supports the backrest.

[0027] The utility model discloses the beneficial effect of:

[0028] The utility model provides a cart, push rod assembly is used for the user to push the cart, and push rod assembly and one of first wheel assembly and second wheel assembly are equipped with support member, and the frame can be folded, can reduce the size of the cart, and one end of the frame is rotatably connected to the first wheel assembly or the second wheel assembly connected with the support member around the first shaft, when the frame is folded, the frame rotates around the first shaft and approaches the support member, further reduces the size of the cart after being folded, so that the cart does not occupy space, and the operation steps of folding the cart are simplified, and folding operation is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the first shaft side view of the cart provided by the utility model embodiment;

[0030] Figure 2 It is the left view of the cart provided by the utility model embodiment;

[0031] Figure 3 It is the schematic diagram of the cart after being folded provided by the utility model embodiment;

[0032] Figure 4 It is the second shaft side view of the cart provided by the utility model embodiment;

[0033] Figure 5 It is the bottom view of the cart provided by the utility model embodiment;

[0034] Figure 6 It is the right view of the cart provided by the utility model embodiment.

[0035] In the drawing:

[0036] 1, frame; 2, push rod assembly; 3, first wheel assembly; 4, second wheel assembly; 5, first linkage; 8, seat frame;

[0037] 11, first support sleeve; 12, bottom frame; 13, second support sleeve; 14, connecting assembly; 141, connecting rod; 142, damping assembly; 143, holding member; 144, horizontal rod;

[0038] 31, first wheel; 32, first linkage rod; 33, transmission tooth; 34, gear shaft; 35, gear; 36, first wheel shaft; 37, first connecting rod; 38, connecting frame;

[0039] 41, second wheel; 42, second wheel shaft; 43, second connecting rod;

[0040] 51, second linkage rod; 52, third linkage rod;

[0041] 61, support; 611, first support part; 612, second support part; 613, third support part;

[0042] 81, seat plate; 82, backrest;

[0043] a, first shaft; b, second shaft. DETAILED DESCRIPTION

[0044] The utility model will be described in further detail below in combination 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.

[0045] 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 fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside 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.

[0046] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include that the first and second features are in direct contact, or the first and second features 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.

[0047] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] As shown in Figures 1 to 3 The present embodiment provides a cart, which comprises a frame 1, a push rod assembly 2 movably arranged on the frame 1, a first wheel assembly 3 arranged at one end of the frame 1, and a second wheel assembly 4 arranged at the other end of the frame 1. A support member 61 is connected between the push rod assembly 2 and one of the first wheel assembly 3 and the second wheel assembly 4. The frame 1 is foldable, and one end of the frame 1 is rotatably connected to the first wheel assembly 3 or the second wheel assembly 4 connected with the support member 61. When the frame 1 is folded, the frame 1 rotates around the first axis a and approaches the support member 61.

[0049] The push rod assembly 2 is used for pushing the cart by a user. The support member 61 is arranged between the push rod assembly 2 and one of the first wheel assembly 3 and the second wheel assembly 4. The frame 1 is foldable, which can reduce the size of the cart. Meanwhile, one end of the frame 1 is rotatably connected to the first wheel assembly 3 or the second wheel assembly 4 connected with the support member 61. When the frame 1 is folded, the frame 1 rotates around the first axis a and approaches the support member 61, further reducing the size of the cart after being folded, so that the cart does not occupy space and the operation steps of folding the cart are simplified, facilitating the folding operation.

[0050] In the direction of advancing the cart, the first wheel assembly 3 is arranged at the front end of the frame 1, the second wheel assembly 4 is arranged at the rear end of the frame 1, and the push rod assembly 2 is arranged at the rear end of the frame 1. The support member 61 can be a support rod or a support pipe. The support member 61 and the push rod assembly 2 can be an integral structure or separately arranged, which is not limited here.

[0051] In some embodiments, the support member 61 is connected between the push rod assembly 2 and the first wheel assembly 3. The first end of the support member 61 is at one end of the frame 1 and connected with the first wheel assembly 3, and the second end of the support member 61 is at the other end of the frame 1 and connected with the push rod assembly 2. One end of the frame 1 is rotatably connected to the first wheel assembly 3 around the first axis a. When folding the frame 1, the frame 1 rotates around the first axis a relative to the first wheel assembly 3, the support member 61 is stationary, the other end of the frame 1 is held, the frame 1 approaches the support member 61, and the folding operation of the cart is completed. The folding operation steps are simple.

[0052] Optionally, the frame 1 comprises a bottom frame 12 and a connecting assembly 14, one end of the bottom frame 12 is rotatably connected to the first wheel assembly 3 around the first axis a, the connecting assembly 14 is connected to the other end of the bottom frame 12, the push rod assembly 2 is movably connected to the connecting assembly 14, the connecting assembly 14 is foldable, when the connecting assembly 14 is folded, the bottom frame 12 is driven to rotate around the first axis a and approach the support 61, thereby achieving the folding of the stroller in the height direction.

[0053] The connecting assembly 14 comprises a connecting rod 141 and a damping assembly 142, one end of the damping assembly 142 is rotatably connected to the bottom frame 12, the other end is rotatably connected to the connecting rod 141, the push rod assembly 2 is movably connected to the connecting rod 141, when the connecting assembly 14 is folded, the connecting rod 141 approaches the damping assembly 142. The connecting rod 141 is connected to the bottom frame 12 through the damping assembly 142, the damping assembly 142 is arranged close to the second wheel assembly 4, during the pushing process of the stroller, the damping assembly 142 plays a damping role for the whole vehicle, thereby improving the comfort of the child. The structure of the damping assembly 142 is prior art, which will not be described in detail here.

[0054] The connecting rod 141 is in U-shaped structure, the two ends of the connecting rod 141 are respectively connected with the damping assembly 142, the middle part of the connecting rod 141 is connected with the push rod assembly 2, the push rod assembly 2 is arranged on the connecting rod 141, thereby improving the height of the push rod assembly 2, which is convenient for the user to push the stroller through the push rod assembly 2.

[0055] The damping assembly can also be a four-bar linkage structure or a multi-link structure, through the movement of the positions of the rods and shafts, the shock absorber is matched to achieve the purpose of shock absorption. Since the linkage structure with damping function is prior art, it will not be described in detail here. The above connecting assembly can also be other structures with folding function, which will not be described in detail here.

[0056] The opposite sides of the chassis 12 are respectively provided with holding members 143, one end of the holding member 143 is rotationally connected with the chassis 12, a cross bar 144 is arranged between the holding member 143 and the connecting rod 141 of the corresponding side, one end of the cross bar 144 is rotationally connected with the holding member 143 of the corresponding side, the other end of the cross bar 144, the connecting rod 141 and the damping assembly 142 are rotationally connected at a point, when the frame 1 is folded, the holding member 143 and the cross bar 144 are close to each other. Rotate the holding member 143 downward, the cross bar 144 drives the damping assembly 142 to rotate downward, the holding member 143 and the damping assembly 142 are both rotated toward the front end of the stroller, the connecting rod 141 is rotated relative to the damping assembly 142 and toward the rear end of the stroller, the holding member 143 and the cross bar 144 are close to each other, thereby driving the chassis 12 to close to the support member 61 around the first axis a, thereby realizing the folding of the stroller in the height direction, without occupying space. Further, the push rod assembly 2 is movably connected with the support member 61, the push rod assembly 2 can be folded relative to the support member 61, further reducing the height of the stroller. Alternatively, the push rod assembly 2 is rotationally connected with the support member 61, and the push rod assembly 2 can be folded downward relative to the support member 61.

[0057] Alternatively, the first end of the support member 61 is fixedly connected with the first wheel assembly 3. Preferably, the first wheel assembly 3 is provided with a first support sleeve 11, the first end of the support member 61 passes through the first support sleeve 11, and the support member 61 is connected with the first wheel assembly 3. The first support sleeve 11 supports the first end of the support member 61.

[0058] The connecting assembly 14 is rotationally connected with the second end of the support member 61 around the second axis b, when the frame 1 is folded, the connecting assembly 14 is folded and rotates relative to the support member 61 around the second axis b, driving the frame 1 to close to the support member 61 around the first axis a. Preferably, the connecting assembly 14 is provided with a second support sleeve 13 rotationally connected around the second axis b, and the second support sleeve 13 is rotationally connected with the connecting rod 141 around the second axis b. The second end of the support member 61 passes through the second support sleeve 13 and is connected with the push rod assembly 2, when the frame 1 is folded, the connecting assembly 14 is folded and rotates relative to the support member 61 around the second axis b, driving the frame 1 to close to the support member 61 around the first axis a. The second support sleeve 13 supports the second end of the support member 61. When the frame 1 is folded, the connecting assembly 14 is folded and rotates relative to the support member 61 around the second axis b, driving the frame 1 to close to the support member 61 around the first axis a. When the frame 1 is unfolded, the support member 61 can swing relative to the frame 1 to drive the frame 1 to turn.

[0059] In some embodiments, a support member is connected between the push rod assembly 2 and the second wheel assembly 4, the first end of the support member is connected with the second wheel assembly 4, the second end of the support member is connected with the push rod assembly 2, and the frame 1 is pivotally connected with the second wheel assembly 4 about a first axis. When folding the frame 1, the frame 1 is pivoted about the first axis relative to the second wheel assembly 4, the support member is stationary, one end of the frame 1 is held, the frame 1 is moved towards the support member, and the folding operation of the stroller is completed. The folding operation is simple. When the stroller is running or reversing, the stroller needs to be turned. The push rod assembly 2 is operated to turn the stroller.

[0060] Referring to Figure 1 、 Figure 4 and 5 , in some embodiments, the first end of the support member 61 is drivingly connected with one of the first wheel assembly 3 and the second wheel assembly 4, the second end of the support member 61 is connected with the push rod assembly 2, and the support member 61 can swing relative to the frame 1 to drive the first wheel assembly 3 or the second wheel assembly 4 to turn. When the push rod assembly 2 moves, the first wheel assembly 3 or the second wheel assembly 4 connected with the support member 61 can be driven to turn by the support member 61. The user can turn the stroller during pushing the stroller by holding the push rod assembly 2, and the operation is convenient. The first wheel assembly 3 or the second wheel assembly 4 not connected with the support member 61 is a universal wheel structure or a directional wheel structure.

[0061] Optionally, a support sleeve is arranged on the first wheel assembly 3 or the second wheel assembly 4 or the frame 1, the support member 61 passes through the support sleeve and is drivingly connected with the first wheel assembly 3 or the second wheel assembly 4, and the support member 61 can swing in the first direction relative to the support sleeve.

[0062] In an implementable mode, when the first end of the support member 61 is drivingly connected with the first wheel assembly 3 and the second end of the support member 61 is connected with the push rod assembly 2, a first support sleeve 11 is arranged on the first wheel assembly 3, the first end of the support member 61 passes through the first support sleeve 11, a second support sleeve 13 is arranged on the connecting assembly 14, the second end of the support member 61 passes through the second support sleeve 13, and the support member 61 can swing in the first direction relative to the first support sleeve 11 and the second support sleeve 13, thereby transmitting force to the first wheel assembly 3 to turn the first wheel assembly 3.

[0063] Optionally, the first wheel assembly 3 comprises a connecting frame 38 and two first wheels 31, a first linkage rod 32 is arranged between the two first wheels 31, both ends of the first linkage rod 32 are rotatably connected with the two first wheels 31 respectively, a transmission gear 33 is arranged on the first linkage rod 32 along the extending direction of the first linkage rod 32, the first end of the support 61 is movably connected with a gear shaft 34, the gear shaft 34 is connected with a gear wheel 35, the gear shaft 34 is rotatably connected with the connecting frame 38, and the gear wheel 35 is engaged with the transmission gear 33. The movement of the support 61 drives the rotation of the gear shaft 34, the rotation of the gear shaft 34 drives the rotation of the gear wheel 35 around its own axis, thereby driving the first linkage rod 32 to move in the extending direction of the first linkage rod 32, the translation of the first linkage rod 32 drives the synchronous rotation of the two first wheels 31 in the same direction, thereby realizing the linkage of the two first wheels 31. The transmission connection between the support 61 and the first wheel assembly 3 is realized through the gear structure, which is more labor-saving during operation. In addition, the transmission gear 33 is machined on the first linkage rod 32, which reduces the number of parts. The gear wheel 35 can be a sector gear, which satisfies the maximum angle of rotation of the first wheel 31 and does not occupy space. Optionally, the first end of the support 61 is connected with the gear shaft 34 in a universal manner. The second wheel assembly 4 is a universal wheel structure or a directional wheel structure.

[0064] The two first wheels 31 are rotatably connected with the connecting frame 38 through the corresponding first wheel shafts 36 respectively, and a first connecting rod 37 is arranged on each first wheel shaft 36 correspondingly, one end of the first connecting rod 37 is fixedly connected with the first wheel shaft 36, and the other end of the first connecting rod 37 is rotatably connected with the end portion of the first linkage rod 32. The first connecting rod 37 is arranged to facilitate the connection of the first linkage rod 32 and the first wheel 31. The first support sleeve 11 is arranged on the connecting frame 38.

[0065] In another implementable manner, when the first end of the support is in transmission connection with the second wheel assembly 4 and the second end of the support is connected with the push rod assembly 2, the first support sleeve is arranged on the second wheel assembly 4, the second support sleeve is arranged on the connecting assembly 14, the first end of the support passes through the first support sleeve, the second end of the support passes through the second support sleeve, and the support can swing in the first direction relative to the first support sleeve and the second support sleeve, thereby transmitting power to the second wheel assembly 4 to make the second wheel assembly 4 turn.

[0066] Optionally, the second wheel assembly 4 comprises two second wheels 41, and a second linkage rod 51 is arranged between the two second wheels 41, two ends of the second linkage rod 51 are rotationally connected with the two second wheels 41 respectively, and a transmission gear is arranged on the second linkage rod 51 along the extending direction of the second linkage rod 51. The first end of the support member is movably connected with a gear shaft, and the gear shaft is connected with a gear. The gear shaft is rotationally connected with the frame 1, and the gear is in mesh with the transmission gear. The movement of the support member drives the gear shaft to rotate, the rotation of the gear shaft drives the gear to rotate around its own axis, and then drives the second linkage rod 51 to move in the extending direction of the second linkage rod 51. The translation of the second linkage rod 51 drives the two second wheels 41 to rotate synchronously and in the same direction, and then realizes the linkage of the two second wheels 41. The first wheel assembly 3 is a universal wheel structure or a directional wheel structure.

[0067] In other embodiments, the first end of the support member 61 is in transmission connection with one of the first wheel assembly 3 and the second wheel assembly 4, the second end of the support member 61 is connected with the push rod assembly 2, and a first linkage member 5 is arranged between the first wheel assembly 3 and the second wheel assembly 4. The support member 61 can swing relative to the frame 1 to drive the first wheel assembly 3 or the second wheel assembly 4 to steer. When the push rod assembly 2 moves, one of the first wheel assembly 3 and the second wheel assembly 4 connected with the support member 61 can be driven to steer by the support member 61, the first linkage member 5 is driven to steer the other one of the first wheel assembly 3 and the second wheel assembly 4 synchronously, the synchronous steering of the first wheel assembly 3 and the second wheel assembly 4 is realized, the process of steering the stroller is smoother, and it is not necessary to additionally apply force to the other wheel assembly to steer after one of the wheel assemblies is steered. The simultaneous steering of the first wheel assembly 3 and the second wheel assembly 4 reduces the turning radius of the stroller, the turning is more flexible, and the user experience is improved.

[0068] Optionally, a support sleeve is arranged on the first wheel assembly 3 or the second wheel assembly 4 or the frame 1, the support member 61 passes through the support sleeve and is in transmission connection with the first wheel assembly 3 or the second wheel assembly 4, and the support member 61 can swing in the first direction relative to the support sleeve. In an implementable mode, when the first end of the support member 61 is in transmission connection with the first wheel assembly 3 and the second end of the support member 61 is connected with the push rod assembly 2, a first support sleeve 11 is arranged on the first wheel assembly 3, the first end of the support member 61 passes through the first support sleeve 11, a second support sleeve 13 is arranged on the connecting assembly 14, the second end of the support member 61 passes through the second support sleeve 13, and the support member 61 can swing in the first direction relative to the first support sleeve 11 and the second support sleeve 13, and then transmits force to the first wheel assembly 3 to steer the first wheel assembly 3 and drive the first linkage member 5 to steer the second wheel assembly 4 synchronously.

[0069] Optionally, the first wheel assembly 3 comprises a connecting frame 38 and two first wheels 31, the connecting frame 38 is rotationally connected with one end of the frame 1 about the first axis a, and the two first wheels 31 are rotationally arranged on the connecting frame 38 respectively. A first linkage rod 32 is arranged between the two first wheels 31, the two ends of the first linkage rod 32 are rotationally connected with the two first wheels 31 respectively, and a transmission tooth 33 is arranged on the first linkage rod 32 along the extending direction of the first linkage rod 32. A gear shaft 34 is movably connected with the first end of the support 61, and a gear 35 is connected with the gear shaft 34. The gear shaft 34 is rotationally connected with the connecting frame 38, the gear 35 is meshed with the transmission tooth 33, and the first linkage 5 is connected with the first linkage rod 32 or the gear 35. The movement of the support 61 drives the rotation of the gear shaft 34, the rotation of the gear shaft 34 drives the rotation of the gear 35 about its own axis, and then drives the movement of the first linkage rod 32 in the extending direction of the first linkage rod 32. The translation of the first linkage rod 32 drives the synchronous rotation of the two first wheels 31 in the same direction, thereby realizing the linkage of the two first wheels 31. The transmission connection between the support 61 and the first wheel assembly 3 is realized through the gear structure, which is more labor-saving during operation. In addition, the transmission tooth 33 is machined on the first linkage rod 32, which reduces the number of parts. The gear 35 can be a sector gear, which satisfies the maximum angle of rotation of the first wheel 31 and does not occupy space. Optionally, the first end of the support 61 is connected with the gear shaft 34 in a universal manner.

[0070] Further optionally, the two first wheels 31 are rotationally connected with the connecting frame 38 through the corresponding first wheel shafts 36 respectively, and a first connecting rod 37 is arranged on each first wheel shaft 36 correspondingly. One end of the first connecting rod 37 is fixedly connected with the first wheel shaft 36, and the other end of the first connecting rod 37 is rotationally connected with the end of the first linkage rod 32. The first connecting rod 37 is arranged to facilitate the connection of the first linkage rod 32 and the first wheel 31. The first support sleeve 11 is arranged on the connecting frame 38.

[0071] Optionally, the second wheel assembly 4 comprises two second wheels 41, and the first linkage 5 comprises a second linkage rod 51 arranged between the two second wheels 41. The two ends of the second linkage rod 51 are rotationally connected with the two second wheels 41 respectively. A third linkage rod 52 is arranged between the second linkage rod 51 and the first wheel assembly 3, and the two ends of the third linkage rod 52 are rotationally connected with the first wheel assembly 3 and the second linkage rod 51 respectively. Specifically, one end of the third linkage rod 52 is rotationally connected with the first linkage rod 32 or the gear 35, and the other end is rotationally connected with the second linkage rod 51. When the first linkage rod 32 moves, the second linkage rod 51 is driven to move along the extending direction of the second linkage rod 51 through the third linkage rod 52, thereby driving the two second wheels 41 to turn synchronously, thereby realizing the simultaneous turning of the first wheel assembly 3 and the second wheel assembly 4.

[0072] Further optionally, the second wheel 41 is rotatably connected with the frame 1 through a second wheel shaft 42, and a second connecting rod 43 is arranged on each second wheel shaft 42 correspondingly, one end of the second connecting rod 43 is fixedly connected with the second wheel shaft 42, and the other end of the second connecting rod 43 is rotatably connected with the end of the second linkage rod 51. The second connecting rod 43 is arranged to facilitate the connection of the second linkage rod 51 and the second wheel 41.

[0073] The first linkage rod 32 and the second linkage rod 51 are both U-shaped structure rods.

[0074] In another implementable manner, when the first end of the support member is in transmission connection with the second wheel assembly 4 and the second end of the support member is connected with the push rod assembly 2, the first support sleeve is arranged on the second wheel assembly 4, the second support sleeve is arranged on the connecting assembly 14, the first end of the support member passes through the first support sleeve, the second end of the support member passes through the second support sleeve, and the support member can swing in the first direction relative to the first support sleeve and the second support sleeve, thereby transmitting power to the second wheel assembly 4 to make the second wheel assembly 4 turn and drive the first linkage member to make the first wheel assembly 3 turn synchronously.

[0075] Optionally, the second wheel assembly 4 includes two second wheels 41, and a second linkage rod is arranged between the two second wheels 41, both ends of the second linkage rod are rotatably connected with the two second wheels 41, a transmission gear is arranged on the second linkage rod in the direction in which the second linkage rod extends, a gear shaft is movably connected with the first end of the support member, a gear is connected with the gear shaft, the gear shaft is rotatably connected with the frame 1, and the gear is in meshing connection with the transmission gear. The movement of the support member drives the gear shaft to rotate, the rotation of the gear shaft drives the gear to rotate around its own axis, thereby driving the second linkage rod to move in the direction in which the second linkage rod extends, and the translation of the second linkage rod drives the two second wheels 41 to rotate synchronously and in the same direction, thereby realizing the linkage of the two second wheels 41.

[0076] The first wheel assembly 3 includes two first wheels 31, and a first linkage rod is arranged between the two first wheels 31, both ends of the first linkage rod are rotatably connected with the two first wheels 31, and a third linkage rod is arranged between the first linkage rod and the second linkage rod or the gear, one end of the third linkage rod is rotatably connected with the first linkage rod, and the other end of the third linkage rod is rotatably connected with the second linkage rod or the gear.

[0077] In combination Figure 1 and Figure 6As shown, in some embodiments, the stroller further comprises a seat frame 8, which is arranged on the support 61 and is supported by the support 61, thereby reducing the number of components. Further, the holding members 143 are arranged on opposite sides of the seat frame 8, and the height of the holding members 143 when unfolded is suitable for a child to hold on the seat frame 8. The holding members 143 can be L-shaped structural members, which are arranged on opposite sides of the seat frame 8, thereby facilitating the child to hold and shielding the child from falling from the sides of the seat frame 8.

[0078] Optionally, the seat frame 8 comprises a seat plate 81 and a backrest 82, which are arranged at an angle. The seat plate 81 is for a child to sit on, and the backrest 82 is for the child to lean against. The support 61 extends obliquely from one end of the frame 1 to the upper rear of the other end of the frame 1. The support 61 comprises a first support portion 611, a second support portion 612, and a third support portion 613 connected in sequence, the first support portion 611 is in transmission connection with the first wheel assembly 3, the second support portion 612 is in L-shaped structure, the third support portion 613 is connected with the push rod assembly 2, the horizontal portion of the second support portion 612 supports the seat plate 81, the vertical portion of the second support portion 612 supports the backrest 82, and the first support portion 611 is arranged lower than the third support portion 613. The second support portion 612 of the support 61 is arranged in adaptation to the structure of the seat frame 8, so as to stably support the seat frame 8.

[0079] Optionally, the support 61 is a support rod or a support pipe, and then the first support portion 611 and the horizontal portion of the second support portion 612 are arranged at an obtuse angle, the first support portion 611 extends obliquely downward relative to the second support portion 612, so as to be in transmission connection with the first wheel assembly 3. The third support portion 613 and the vertical portion of the second support portion 612 are arranged at an obtuse angle, and the third support portion 613 extends obliquely upward relative to the second support portion 612, so as to be connected with the push rod assembly 2.

[0080] Obviously, the above embodiments of the present application are merely exemplary for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A trolley, characterized in that, The vehicle includes a frame, on which a push rod assembly is movably mounted. One end of the frame has a first wheel assembly, and the other end has a second wheel assembly. A support member is connected between the push rod assembly and one of the first wheel assembly and the second wheel assembly. The frame is foldable. One end of the frame is rotatably connected to the first wheel assembly or the second wheel assembly connected to the support member about a first axis. When the frame is folded, it rotates about the first axis and comes close to the support member.

2. The trolley according to claim 1, characterized in that, The support member is connected between the push rod assembly and the first wheel assembly. The first end of the support member is at one end of the frame and connected to the first wheel assembly, and the second end of the support member is at the other end of the frame and connected to the push rod assembly. One end of the frame is rotatably connected to the first wheel assembly around a first axis.

3. The trolley according to claim 2, characterized in that, The frame includes a base frame and a connecting assembly. One end of the base frame is rotatably connected to the first wheel assembly around a first axis. The connecting assembly is connected to the other end of the base frame. The push rod assembly is movably connected to the connecting assembly. The connecting assembly is foldable. When the connecting assembly is folded, it drives the base frame to rotate around the first axis and move closer to the support member.

4. The trolley according to claim 3, characterized in that, The connecting assembly includes a connecting rod and a shock-absorbing assembly. One end of the shock-absorbing assembly is rotatably connected to the base frame, and the other end is rotatably connected to the connecting rod. The push rod assembly is movably connected to the connecting rod. When the connecting assembly is folded, the connecting rod and the shock-absorbing assembly move closer together. The chassis is provided with grips on opposite sides. One end of each grip is rotatably connected to the chassis. A crossbar is provided between the grip and the connecting rod on the corresponding side. One end of the crossbar is rotatably connected to the grip on the corresponding side. The other end of the crossbar, the connecting rod, and the shock absorber are rotatably connected to a point. When the chassis is folded, the grips and the crossbar move closer together.

5. The trolley according to claim 3, characterized in that, The first end of the support member is fixedly connected to the first wheel assembly; and / or The first wheel assembly is provided with a first support sleeve, and a first end of the support member passes through the first support sleeve; the support member is connected to the first wheel assembly; and / or, The connecting component is rotatably connected to the second end of the support member around the second axis. When the frame is folded, the connecting component is folded and rotates relative to the support member around the second axis, causing the frame to move closer to the support member around the first axis. The connecting assembly is provided with a second support sleeve that rotates about a second axis. The second end of the support member passes through the second support sleeve and is connected to the push rod assembly. When the frame is folded, the connecting assembly folds and rotates about the second axis relative to the support member, causing the frame to move upward about the first axis and approach the support member; and / or, When the frame is deployed, the support member can swing relative to the frame to drive the frame to turn.

6. The trolley according to claim 1, characterized in that, The first end of the support member is connected to one of the first wheel assembly and the second wheel assembly, and the second end of the support member is connected to the push rod assembly. When the push rod assembly moves, it can drive the first wheel assembly or the second wheel assembly connected to the support member to turn through the support member.

7. The trolley according to claim 6, characterized in that, A first linkage is provided between the first wheel assembly and the second wheel assembly. When one of the first wheel assembly and the second wheel assembly, which is connected to the support member, turns, it can drive the first linkage to cause the other wheel assembly to turn synchronously; and / or, The support member can swing relative to the frame to drive the first wheel assembly or the second wheel assembly to steer.

8. The trolley according to claim 6 or 7, characterized in that, The first end of the support member is connected to the first wheel assembly via a transmission connection. The first wheel assembly includes a connecting frame and two first wheels. The connecting frame is rotatably connected to one end of the vehicle frame around the first axis. The two first wheels are rotatably mounted on the connecting frame. A first linkage rod is provided between the two first wheels. The two ends of the first linkage rod are rotatably connected to the two first wheels. A transmission tooth is provided on the first linkage rod along the direction of extension of the first linkage rod. A gear shaft is movably connected to the first end of the support member. A gear is connected to the gear shaft. The gear shaft is rotatably connected to the connecting frame. The gear meshes with the transmission tooth. And / or, A support sleeve is provided on the first wheel assembly or the second wheel assembly or on the vehicle frame. The support member passes through the support sleeve and is pulsatingly connected to the first wheel assembly or the second wheel assembly. The support member can swing relative to the support sleeve in a first direction.

9. The trolley according to claim 7, characterized in that, The first end of the support member is connected to the first wheel assembly via a transmission connection. The second wheel assembly includes two second wheels. The first linkage includes a second linkage rod disposed between the two second wheels. The two ends of the second linkage rod are rotatably connected to the two second wheels respectively. A third linkage rod is provided between the second linkage rod and the first wheel assembly. The two ends of the third linkage rod are rotatably connected to the first wheel assembly and the second linkage rod respectively.

10. The trolley according to claim 1, characterized in that, The push rod assembly is movably connected to the support member, and the push rod assembly can be folded relative to the support member; The support member is provided between the push rod assembly and the first wheel assembly. The support member extends obliquely from one end of the frame toward the rear and upper part of the other end of the frame, and a seat is provided on the support member. The seat frame includes a seat plate and a backrest, wherein the backrest and the seat plate are arranged at an angle. The support component includes a first support portion, a second support portion, and a third support portion connected in sequence. The first support portion is connected to the first wheel assembly. The second support portion has an L-shaped structure. The third support portion is connected to the push rod assembly. The horizontal portion of the second support portion supports the seat plate, and the vertical portion of the second support portion supports the backrest.

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