Foldable cart

Abstract

The utility model discloses a foldable cart which comprises a first cart body, second cart bodies capable of being folded along the first cart body are symmetrically hinged to the two sides of the first cart body, and a folding beam capable of opening the two wheel suspensions is arranged between the two wheel suspensions. A connecting rod set capable of switching the folding state and the unfolding state of the folding beam is arranged on the first vehicle body, the two wheel suspensions are synchronously folded inwards when the folding beam is folded, and a pin set capable of keeping the folding beam in the unfolding state is arranged on the first vehicle body. The frame is composed of the first cart body and the second cart bodies hinged to the two sides of the first cart body, the second cart bodies can be folded along the first cart body, the folded cart is in a U shape, the space occupied by the cart can be greatly reduced after the cart is folded, and when the second cart bodies are folded along the first cart body, the cart is convenient to use. The wheel suspensions and the wheels can be synchronously folded and abut against the bottom of the second trolley body, and therefore the space occupied by the trolley can be further saved.

Description

Technical Field

[0001] The utility model relates to the technical field of transportation equipment, in particular to a foldable cart. Background Art

[0002] A trolley is a transport vehicle that is pushed or pulled by manpower. In daily life or work, small items are usually transported by a trolley to reduce the transport burden of the transporter. The trolley is widely used because of its low cost, simple maintenance, convenient operation, light weight, and can work in places where motor vehicles are inconvenient to use.

[0003] For example, the Chinese patent: application number is 200880017775.2, and the patent name is foldable trailer, "including a frame and a towing member, the towing member is installed on the frame by a hinged connection, so that the towing member can be folded downward and pushed to the lower side of the freight surface, and the hinged wheel suspension including wheels, wheel hubs and springs is arranged on the frame and the freight surface, so that the wheels and the wheel suspensions can be rotated to be close to the freight surface, and an axis with joints in the middle and toward each end of the wheel is arranged between the wheel suspensions." The above invention can fold the wheel suspension, wheels and towing member in a folding manner. After folding, the wheel suspension, wheels and towing member will be close to the freight surface. Although the foldable cart can save some space after folding, the size of the space finally occupied by the foldable cart depends on the size of the frame itself. The size occupied by the above-mentioned folded cart will not be less than the space occupied by the frame itself. Utility Model Content

[0004] The purpose of the utility model is to provide a foldable stroller.

[0005] In order to achieve the above purpose, the utility model adopts the following scheme:

[0006] The foldable stroller according to claim 1, wherein the first and second wheels are folded inwardly and the second and second wheels are folded inwardly so as to be able to move the two wheels apart.

[0007] As a further solution of the utility model, the wheel suspension is triangular in shape, a wheel bearing is provided at the top corner of the wheel suspension, and the wheel is mounted on the wheel bearing.

[0008] As a further solution of the utility model, first hinged ears are provided at two bases of the wheel suspension, and annular grooves capable of being hinged to the first hinged ears are symmetrically provided on the axle.

[0009] As a further solution of the utility model, a first limiting plate is provided on one side of the annular groove, and the first limiting plate is arranged on the outer side of the unfolded wheel suspension.

[0010] As a further solution of the utility model, the folding beam includes a connecting block arranged between the two wheel suspensions, a first connecting rod that can swing left and right is hinged at both ends of the connecting block, a second connecting rod that can swing left and right is hinged at one end of the first connecting rod, a hinge groove is vertically provided at the top corner of the wheel suspension, and one end of the second connecting rod is hinged in the hinge groove.

[0011] As a preferred solution of the utility model, a second limit plate is provided at the hinge between the connecting block and the second connecting rod, and the second limit plate is arranged on the outside of the opening direction of the folding beam.

[0012] As a further solution of the utility model, the connecting rod group includes a guide groove arranged on the second car body and located below the connecting block, a moving block is provided on the guide groove, a third connecting rod is hinged between the moving block and the connecting block, a second hinged ear is symmetrically provided on the first car body, an arc-shaped connecting rod is hinged on the second hinged ear, a sliding groove is provided on the third connecting rod, and a sliding shaft cooperating with the sliding groove is provided at one end of the arc-shaped connecting rod.

[0013] As a preferred solution of the utility model, the pin group includes a fixing plate arranged between the two second hinged ears, and coaxial pin holes are respectively provided on the fixing plate and the arc-shaped connecting rod, and a pin is inserted into the pin hole.

[0014] As a preferred solution of the utility model, a push-pull member is hingedly connected to one end of one of the second vehicle bodies.

[0015] To sum up, the utility model has the following beneficial effects compared with the prior art: the frame of the utility model is composed of a first body and a second body hinged on both sides of the first body, and the second body can be folded along the first body, and the cart is U-shaped after being folded. After the cart is folded, the space occupied by the cart can be greatly reduced, and when the second body is folded along the first body, the wheel suspension and the wheels will also be folded synchronously and close to the bottom of the second body, which can further save the space occupied by the cart. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the three-dimensional views of the present utility model.

[0017] Figure 2 This is the second stereoscopic view of the present utility model.

[0018] Figure 3 This is the third stereoscopic view of the present utility model.

[0019] Figure 4 This is an exploded view of the utility model.

[0020] Figure 5 This is one of the views of the utility model after folding.

[0021] Figure 6 This is the second view of the utility model after folding.

[0022] Explanation of the accompanying drawings: 1. first vehicle body; 2. second vehicle body; 3. axle; 4. wheel suspension; 5. wheel; 6. folding beam; 7. connecting rod group; 8. pin group; 11. wheel bearing; 12. first hinged ear; 13. annular groove; 14. first limit plate; 61. connecting block; 62. first connecting rod; 63. second connecting rod; 64. hinged groove; 65. second limit plate; 71. guide groove; 72. moving block; 73. third connecting rod; 74. second hinged ear; 75. arc connecting rod; 76. slide groove; 77. sliding shaft; 81. fixing plate; 82. latch hole; 83. latch; 91. push-pull member. DETAILED DESCRIPTION

[0023] The following specific implementation content provides a variety of different embodiments or examples for implementing the utility model. Of course, these are only embodiments or examples and are not intended to be limiting. In addition, repeated reference numerals may be used in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of simply and clearly describing the utility model and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0024] In addition, space-related words may be used, such as "below", "lower side", "from the inside out", "above", "upper side" and similar words. These relative words are for the convenience of describing the relationship between one element or feature and another element or feature in the drawings. These spatial relative words include different orientations of the device in use or operation, as well as the orientations described in the drawings. The device may be turned to different orientations, rotations or other orientations, and the space-related adjectives used therein may also be interpreted in the same way. Therefore, it cannot be understood as a limitation on the utility model. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0025] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods: Figures 1 to 6 A foldable cart shown in the figure comprises a first body 1 on both sides of which are symmetrically hinged second bodies 2 that can be folded along the first body 1; axles 3 are symmetrically arranged at the bottom of the second body 2; wheel suspensions 4 that can be folded inwards are hinged on the axles 3; wheels 5 are mounted on the wheel suspensions 4; a folding beam 6 that can open the two wheel suspensions 4 is arranged between the two wheel suspensions 4; a connecting rod group 7 that can switch the folding beam 6 between a folded state and an open state is arranged on the first body 1; when the folding beam 6 is folded, the two wheel suspensions 4 are synchronously folded inwards; and a pin group 8 that can keep the folding beam 6 in an open state is arranged on the first body 1.

[0026] A further embodiment of the wheel suspension 4 in the present invention: the wheel suspension 4 is triangular, a wheel bearing 11 is provided at the top corner of the wheel suspension 4, the wheel 5 is mounted on the wheel bearing 11, the wheel suspension 4 is triangular because the triangle is more stable and not easy to deform, the wheel bearing 11 is the prior art, and the wheel 5 is mounted on the wheel bearing 11 and rotates along it.

[0027] A further embodiment of the wheel suspension 4 in the present invention: a first articulated ear 12 is provided at the two bases of the wheel suspension 4, and an annular groove 13 which can be articulated with the first articulated ear 12 is symmetrically provided on the axle 3. After the first articulated ear 12 and the annular groove 13 are articulated with each other, the wheel suspension 4 can rotate along the axis of the axle 3.

[0028] A further embodiment of the annular groove 13 in the utility model: a first limiting plate 14 is provided on one side of the annular groove 13, and the first limiting plate 14 is arranged on the outer side of the unfolded wheel suspension 4. The first limiting plate 14 plays a limiting role. When the wheel suspension is unfolded outward and is 90 degrees with the second vehicle body 2, the first limiting plate 14 will limit the wheel suspension 4 from unfolding outward.

[0029] A further embodiment of the folding beam 6 in the utility model: the folding beam 6 includes a connecting block 61 arranged between the two wheel suspensions 4, a first connecting rod 62 that can swing left and right is hinged at both ends of the connecting block 61, a second connecting rod 63 that can swing left and right is hinged at one end of the first connecting rod 62, a hinge groove 64 is vertically provided at the top corner of the wheel suspension 4, and one end of the second connecting rod 63 is hinged in the hinge groove 64, such as Figure 5 and Figure 6 As shown, when the second vehicle body 2 is folded along the first vehicle body 1, the folding beam 6 will be folded synchronously. After the folding beam 6 is folded, it will be folded into the following Figure 3 and Figure 6 As shown, the stroller can be folded into a U-shape, and the wheel suspension 4 and the wheels 5 can be folded to be parallel to the second vehicle body 2.

[0030] A further embodiment of the connecting block 61 in the utility model: a second limiting plate 65 is provided at the hinge of the connecting block 61 and the second connecting rod 63, and the second limiting plate 65 is arranged on the outside of the opening direction of the folding beam 6. The function of the second limiting plate 65 is that after the folding beam 6 is unfolded into a straight line, the second limiting plate 65 will keep the folding beam 6 in a straight line.

[0031] A further embodiment of the connecting rod group 7 in the utility model: the connecting rod group 7 includes a guide groove 71 arranged on the second body 2 and below the connecting block 61, a moving block 72 is provided on the guide groove 71, a third connecting rod 73 is hinged between the moving block 72 and the connecting block 61, a second hinged ear 74 is symmetrically provided on the first body 1, an arc-shaped connecting rod 75 is hinged on the second hinged ear 74, a slide groove 76 is provided on the third connecting rod 73, and a sliding shaft 77 cooperating with the slide groove 76 is provided at one end of the arc-shaped connecting rod 75. The arc-shaped connecting rod 75 can synchronously drive the folding beam 6 to fold when the second body 2 is folded along the first body 1, and drive the wheel suspension 4 to fold.

[0032] A further embodiment of the pin group 8 in the present invention: the pin group 8 includes a fixing plate 81 arranged between two second hinged ears 74, and coaxial pin holes 82 are respectively provided on the fixing plate 81 and the arc-shaped connecting rod 75, and a pin 83 is inserted into the pin hole 82. When the pin 83 is inserted into the pin hole 82 on the fixing plate 81 and the arc-shaped connecting rod 75, the position of the arc-shaped connecting rod 75 is fixed, the folding beam 6 can maintain a straight line, and the wheel suspension 4 can maintain verticality with the second vehicle body 2.

[0033] A further embodiment of the second vehicle body 2 of the present invention: a push-pull member 91 is hingedly connected at one end of one of the second vehicle bodies 2 .

[0034] When in use: the wheel suspension 4 is triangular because the triangle is more stable and not easy to deform. The wheel bearing 11 is a prior art. The wheel 5 is mounted on the wheel bearing 11 and rotates along it. After the first hinge ear 12 and the annular groove 13 are hinged to each other, the wheel suspension 4 can rotate along the axis of the axle 3. The first limit plate 14 plays a limiting role. When the wheel suspension is expanded outward and is 90 degrees with the second vehicle body 2, the first limit plate 14 will limit the wheel suspension 4 from expanding outward. Figure 5 and Figure 6 As shown, when the second vehicle body 2 is folded along the first vehicle body 1, the folding beam 6 will be folded synchronously. After the folding beam 6 is folded, it will be folded into the following Figure 3 and Figure 6As shown, the cart will be folded into a U shape, the wheel suspension 4 and the wheel 5 will be folded to be parallel to the second vehicle body 2, and the function of the second limit plate 65 is that after the folding beam 6 is unfolded into a straight line, the second limit plate 65 will keep the folding beam 6 in a straight line, and the arc-shaped connecting rod 75 can synchronously drive the folding beam 6 to fold when the second vehicle body 2 is folded along the first vehicle body 1, and drive the wheel suspension 4 to fold, and when the pin 83 is inserted into the pin hole 82 on the fixing plate 81 and the arc-shaped connecting rod 75, the position of the arc-shaped connecting rod 75 is fixed, the folding beam 6 can be kept in a straight line, and the wheel suspension 4 can be kept perpendicular to the second vehicle body 2.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A foldable stroller, comprising a first body (1), a second body (2) symmetrically hinged on both sides of the first body (1) and capable of being folded along the first body (1), axles (3) symmetrically arranged at the bottom of the second body (2), a wheel suspension (4) hinged on the axle (3) capable of being folded inwardly, wheels (5) mounted on the wheel suspension (4), wherein: A folding beam (6) capable of opening the two wheel suspensions (4) is provided between the two wheel suspensions (4); a connecting rod group (7) capable of switching the folding beam (6) between a folded state and an open state is provided on the first vehicle body (1); when the folding beam (6) is folded, the two wheel suspensions (4) are folded inwards synchronously; and a pin group (8) capable of keeping the folding beam (6) in an open state is provided on the first vehicle body (1).

2. A foldable stroller according to claim 1, characterized in that: The wheel suspension (4) is triangular in shape, a wheel bearing (11) is provided at the top corner of the wheel suspension (4), and the wheel (5) is mounted on the wheel bearing (11).

3. A foldable stroller according to claim 2, characterized in that: First hinged ears (12) are provided at two bases of the wheel suspension (4), and an annular groove (13) capable of being hinged to the first hinged ears (12) is symmetrically provided on the axle (3).

4. A foldable stroller according to claim 3, characterized in that: A first limiting plate (14) is provided on one side of the annular groove (13), and the first limiting plate (14) is arranged on the outside of the unfolded wheel suspension (4).

5. A foldable stroller according to claim 1, characterized in that: The folding beam (6) comprises a connecting block (61) arranged between two wheel suspensions (4), a first connecting rod (62) which can swing left and right is hinged at both ends of the connecting block (61), a second connecting rod (63) which can swing left and right is hinged at one end of the first connecting rod (62), a hinge groove (64) is vertically arranged at the top corner of the wheel suspension (4), and one end of the second connecting rod (63) is hinged in the hinge groove (64).

6. A foldable stroller according to claim 5, characterized in that: A second limiting plate (65) is provided at the hinged portion between the connecting block (61) and the second connecting rod (63), and the second limiting plate (65) is arranged on the outside of the opening direction of the folding beam (6).

7. A foldable stroller according to claim 6, characterized in that: The connecting rod assembly (7) comprises a guide groove (71) arranged on the second vehicle body (2) below the connecting block (61); a moving block (72) is arranged on the guide groove (71); a third connecting rod (73) is hinged between the moving block (72) and the connecting block (61); a second hinged ear (74) is symmetrically arranged on the first vehicle body (1); an arc connecting rod (75) is hinged on the second hinged ear (74); a sliding groove (76) is arranged on the third connecting rod (73); and a sliding shaft (77) cooperating with the sliding groove (76) is arranged at one end of the arc connecting rod (75).

8. A foldable stroller according to claim 7, characterized in that: The pin assembly (8) comprises a fixing plate (81) arranged between two second hinged ears (74), and coaxial pin holes (82) are respectively provided on the fixing plate (81) and the arc-shaped connecting rod (75), and a pin (83) is inserted into the pin hole (82).

9. The foldable stroller according to claim 1, characterized in that: A push-pull member (91) is hingedly connected to one end of one of the second vehicle bodies (2).

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