Folding cart

Abstract

The utility model discloses a folding cart which comprises a folding frame connected with wheels and a flexible bearing platform connected to the folding frame, and the folding frame comprises a first folding net, a second folding net, a third folding net and a fourth folding net which are sequentially arranged in a four-dimensional mode. A first rotating part is connected between the first folding net and the second folding net; a second rotating part is connected between the second folding net and the third folding net; a third rotating part is connected between the third folding net and the fourth folding net; and a fourth rotating part is connected between the fourth folding net and the first folding net. As long as the four folding nets are folded at the same time, the folding frame can be folded. The four folding nets are similar to a common folding door and are formed by more than one group of connecting rods which are rotatably connected in an X shape. The folding basket formed by the four-side folding mechanism is matched with the flexible bearing platform, so that the folding basket is simple to manufacture, simple and understandable in folding mode, capable of being folded up and down and horizontally, and small in size after being folded.

Description

Technical Field

[0001] The present invention belongs to the field of transportation means, and particularly relates to a folding trolley. Background Art

[0002] In the current market, folding trolleys are widely used for transporting goods or carrying people, and have portability and flexibility. The existing technologies mainly include traditional handcarts and trolleys with a foldable design, and these trolleys usually adopt metal or plastic materials.

[0003] In the Chinese utility model patent with the publication number CN221293642U and the invention name "Frame folding structure of a folding trolley", a folding trolley is disclosed. A support assembly for supporting a top frame is provided on a chassis of the folding trolley. The support assembly includes a support frame, two first connecting rods, two second connecting rods and two connecting blocks. Two ends of the support frame are respectively pivotally connected to the two connecting blocks. The middle part of the support frame is detachably connected to the top frame. The first ends of the two first connecting rods are respectively fixedly connected to the two connecting blocks. The second ends of the first connecting rods are rotatably connected to the chassis. The first ends of the two second connecting rods are respectively pivotally connected to the two connecting blocks. The second ends of the second connecting rods are rotatably connected to a sliding seat. This folding mechanism has a complex distribution, is cumbersome to manufacture, and the folding and unfolding processes are cumbersome and not intuitive enough. After folding, it has a large volume and is not convenient for storage or carrying. Therefore, it is particularly important to develop a more efficient, stable and easy-to-operate folding trolley, and a trolley that can meet the requirement of significantly reduced volume after folding to meet the growing market demand for transportation means. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a folding trolley with simple manufacturing, an easy-to-understand folding method, which can be folded up and down or horizontally, and has a small volume after folding, in view of the above-mentioned current situation of the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problem is: a folding trolley, including a folding frame connected with wheels, and a flexible supporting platform connected to the folding frame. The folding frame includes a first folding net, a second folding net, a third folding net and a fourth folding net arranged in a four-dimensional order in sequence;

[0006] A first rotating part is connected between the first folding net and the second folding net;

[0007] A second rotating part is connected between the second folding net and the third folding net;

[0008] A third rotating part is connected between the third folding net and the fourth folding net;

[0009] A fourth rotating part is connected between the fourth folding net and the first folding net.

[0010] As long as the first folding net, the second folding net, the third folding net and the fourth folding net are folded simultaneously, the folding frame will be folded, and the flexible supporting platform will also be folded. The first folding net, the second folding net, the third folding net and the fourth folding net are similar to common folding doors and are composed of more than one set of link rods rotatably connected in an X shape.

[0011] In a preferred embodiment, the first folding net includes a first end connected to the first rotating part and a second end connected to the fourth rotating part, and further includes a third end above the first end and a fourth end above the second end;

[0012] The second folding net includes a fifth end connected to the first rotating part and a sixth end connected to the second rotating part, and further includes a seventh end above the fifth end and an eighth end above the sixth end;

[0013] The third folding net includes a ninth end connected to the second rotating part and a tenth end connected to the third rotating part, and further includes an eleventh end above the ninth end and a twelfth end above the tenth end;

[0014] The fourth folding net includes a thirteenth end connected to the third rotating part and a fourteenth end connected to the fourth rotating part, and further includes a fifteenth end above the thirteenth end and a sixteenth end above the fourteenth end. Such a structure ensures the stability of the folding frame chassis.

[0015] In a preferred embodiment, a fifth rotating part is connected between the third end and the seventh end; a sixth rotating part is connected between the eighth end and the eleventh end;

[0016] A seventh rotating part is connected between the twelfth end and the fifteenth end; an eighth rotating part is connected between the fifteenth end and the fourth end. Such a structure can sleeve the flexible supporting platform on the fifth rotating part, the sixth rotating part, the seventh rotating part and the eighth rotating part.

[0017] In a preferred embodiment, a first guide post is connected to the first rotating part, a second guide post is connected to the fourth rotating part, the fifth rotating part is provided with a first channel for the first guide post to slide, and the eighth rotating part is provided with a second channel for the second guide post to slide. The first guide post can prevent the first rotating part and the fifth rotating part from generating horizontal irregular misalignment during the folding and unfolding of the folding basket. Similarly, the second guide post can prevent the fourth rotating part and the eighth rotating part from generating horizontal irregular misalignment during the folding and unfolding of the folding basket.

[0018] In a preferred embodiment, the upper end of the first guide post is rotatably connected to a first handle through a first rotating shaft; the upper end of the second guide post is rotatably connected to a second handle through a second rotating shaft. The first handle and the second handle can be folded, and after the trolley is fully unfolded, the first handle and the second handle increase the volume of the trolley.

[0019] In a preferred embodiment, a fifth folding net is connected between the first handle and the second handle, which can ensure that the first handle and the second handle are unfolded simultaneously.

[0020] In a preferred embodiment, the fifth folding net includes a first rotating end rotatably connected to the first handle, a second rotating end rotatably connected to the second handle, as well as a first sliding end and a second sliding end.

[0021] In a preferred embodiment, the first folding net, the second folding net, the third folding net, and the fourth folding net are respectively provided with limiting members to restrict their further expansion.

[0022] In a preferred embodiment, there are a total of 4 wheels, which are respectively connected to the first rotating part, the second rotating part, the third rotating part, and the fourth rotating part.

[0023] In a preferred embodiment, the first rotating part, the second rotating part, the third rotating part, the fourth rotating part, the fifth rotating part, the sixth rotating part, and the eighth rotating part are all made of flexible rubber. However, in a general embodiment, the first rotating part, the second rotating part, the third rotating part, the fourth rotating part, the fifth rotating part, the sixth rotating part, and the eighth rotating part are all bases with rotating shafts.

[0024] In summary, compared with the prior art, the folding cart of the present utility model adopts a folding basket composed of a four-sided folding mechanism, and cooperates with a flexible supporting platform to realize a folding cart with simple manufacturing, a simple and easy-to-understand folding method, which can be folded up and down or horizontally, and has a small volume after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of Embodiment 1;

[0026] Figure 2 is Figure 1 an exploded schematic diagram of

[0027] Figure 3 is Figure 2 a schematic structural diagram of the folding basket in

[0028] Figure 4 is Figure 3 an exploded schematic diagram of

[0029] Figure 5 is a schematic structural diagram of Embodiment 2;

[0030] Figure 6It is a schematic diagram of the triple structure of the embodiment;

[0031] Figure 7 It is a schematic diagram of the structure of the folding basket in Embodiment 3;

[0032] Figure 8 It is Figure 7 exploded schematic diagram;

[0033] Figure 9 It is a schematic diagram of the structure of Embodiment 4;

[0034] Figure 10 It is a schematic diagram of the structure of the limiting part;

[0035] Figure 11 It is a schematic diagram of the structure of a trolley for carrying people. Specific embodiments

[0036] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] The reference numerals therein are: wheel 5, flexible support platform 6, first folding net 1, second folding net 2, third folding net 3, fourth folding net 4, first rotating part 51, second rotating part 52, third rotating part 53, fourth rotating part 54, first end 11, second end 14, third end 12, fourth end 13, fifth end 24, sixth end 21, seventh end 23, eighth end 22, ninth end 34, tenth end 31, eleventh end 33, twelfth end 32, thirteenth end 44, fourteenth end 41, fifteenth end 43, sixteenth end 42, fifth rotating part 55, sixth rotating part 56, seventh rotating part 57, eighth rotating part 58, limiting member 9, first guide post 71, second guide post 76, first channel 551, second channel 581, first rotating shaft 72, first grip 73, second rotating shaft 75, second grip 74, fifth folding net 8, first rotating end 81, second rotating end 84, first sliding end 82, second sliding end 83.

[0038] The flexspline 7 belongs to a small module non-circular gear, and it is relatively difficult to directly measure various errors. It is simpler to use the method of measuring the distance between pins. The distance between pins of the flexspline 7 is as Figure 1 shown.

[0039] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0040] It should be noted that the term "including" and any of its variations in the description, claims, and the above-mentioned drawings of this application are intended to cover non-exclusive inclusion. For example, a product containing a series of units does not have to be limited to those units clearly listed, but may include other units not clearly listed or inherent to these products.

[0041] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated device, element, or component must have a specific orientation or be constructed and operated in a specific orientation.

[0042] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0044] A folding cart, as Figures 1 to 3 shown, includes a folding frame connected with wheels 5, and a flexible supporting platform 6 connected to the folding frame. The folding frame includes a first folding net 1, a second folding net 2, a third folding net 3, and a fourth folding net 4 arranged in a four-dimensional sequence in turn;

[0045] A first rotating part 51 is connected between the first folding net 1 and the second folding net 2;

[0046] A second rotating part 52 is connected between the second folding net 2 and the third folding net 3;

[0047] A third rotating part 53 is connected between the third folding net 3 and the fourth folding net 4;

[0048] A fourth rotating part 54 is connected between the fourth folding net 4 and the first folding net 1.

[0049] In the embodiment, as Figure 2 and Figure 3As shown, the first folding net 1 includes a first end 11 connected to the first rotating part 51 and a second end 14 connected to the fourth rotating part 54. It also includes a third end 12 above the first end 11 and a fourth end 13 above the second end 14;

[0050] The second folding net 2 includes a fifth end 24 connected to the first rotating part 51 and a sixth end 21 connected to the second rotating part 52. It also includes a seventh end 23 above the fifth end 24 and an eighth end 22 above the sixth end 21;

[0051] The third folding net 3 includes a ninth end 34 connected to the second rotating part 52 and a tenth end 31 connected to the third rotating part 53. It also includes an eleventh end 33 above the ninth end 34 and a twelfth end 32 above the tenth end 31;

[0052] The fourth folding net 4 includes a thirteenth end 44 connected to the third rotating part 53 and a fourteenth end 41 connected to the fourth rotating part 54. It also includes a fifteenth end 43 above the thirteenth end 44 and a sixteenth end 42 above the fourteenth end 41.

[0053] In the embodiment, as Figure 2 and Figure 3 shown, a fifth rotating part 55 is connected between the third end 12 and the seventh end 23; a sixth rotating part 56 is connected between the eighth end 22 and the eleventh end 33;

[0054] a seventh rotating part 57 is connected between the twelfth end 32 and the fifteenth end 43; an eighth rotating part 58 is connected between the fifteenth end 43 and the fourth end 13.

[0055] In the embodiment, the first folding net 1, the second folding net 2, the third folding net 3, and the fourth folding net 4 are respectively provided with a limiting member 9 for restricting their own continuous expansion. As Figure 10 shown, the structure of the limiting member 9 on the first folding net 1 is disclosed. Preferably, the structures of the second folding net 2, the third folding net 3, and the fourth folding net 4 are the same as that of the first folding net 1.

[0056] In the embodiment, there are a total of 4 wheels 5, which are respectively connected to the first rotating part 51, the second rotating part 52, the third rotating part 53, and the fourth rotating part 54.

[0057] In the embodiment, the first rotating part 51, the second rotating part 52, the third rotating part 53, the fourth rotating part 54, the fifth rotating part 55, the sixth rotating part 56, and the eighth rotating part 58 are all made of flexible rubber, so as not to affect the rotation between the first folding net 1, the second folding net 2, the third folding net 3, and the fourth folding net 4.

[0058] In the embodiment, each of the first folding net 1, the second folding net 2, the third folding net 3 and the fourth folding net 4 has only two connecting rods rotatably connected in an X shape. Embodiment Two

[0059] Embodiment Two adds new technical features on the basis of Embodiment One, specifically as Figure 5 shown, a first guide post 71 is connected to the first rotating part 51, a second guide post 76 is connected to the fourth rotating part 54, the fifth rotating part 55 is provided with a first channel 551 for the first guide post 71 to slide, and the eighth rotating part 58 is provided with a second channel 581 for the second guide post 76 to slide.

[0060] In the embodiment, as Figure 5 shown, the upper end of the first guide post 71 is rotatably connected with a first grip 73 through a first rotating shaft 72; the upper end of the second guide post 76 is rotatably connected with a second grip 74 through a second rotating shaft 75.

[0061] In the embodiment, as Figure 5 shown, a fifth folding net 8 is connected between the first grip 73 and the second grip 74.

[0062] In the embodiment, as Figure 5 shown, the fifth folding net 8 includes a first rotating end 81 rotatably connected to the first grip 73, a second rotating end 84 rotatably connected to the second grip 74, and a first sliding end 82 and a second sliding end 83. Embodiment Three

[0063] The structure of Embodiment Three is similar to that of Embodiment One, as Figures 6 to 8 shown, the difference is only that the first folding net 1, the second folding net 2, the third folding net 3 and the fourth folding net 4 are composed of multiple groups of connecting rods rotatably connected in an X shape, similar to the structure of a folding door. Embodiment Four

[0064] The structure of Embodiment Four is similar to that of Embodiment Two, as Figure 9 shown, the difference is also only that the first folding net 1, the second folding net 2, the third folding net 3 and the fourth folding net 4 are composed of multiple groups of connecting rods rotatably connected in an X shape, similar to the structure of a folding door.

[0065] Figure 1 , 2 , 6, the flexible supporting platform 6 shown is used for holding items, Figure 11 shown, the flexible supporting platform 6 has a seat cushion and a backrest and can be used for carrying people.

[0066] The best embodiments of the present invention have been illustrated, and various changes or modifications made by those of ordinary skill in the art will not depart from the scope of the present invention.

Claims

1. A folding cart, comprising a folding frame connected with wheels (5), and a flexible supporting platform (6) connected to the folding frame, characterized in that, The folding frame described above includes a first folding net (1), a second folding net (2), a third folding net (3), and a fourth folding net (4) arranged in a four-dimensional sequence in turn; A first rotating part (51) is connected between the first folding net (1) and the second folding net (2); A second rotating part (52) is connected between the second folding net (2) and the third folding net (3); A third rotating part (53) is connected between the third folding net (3) and the fourth folding net (4); A fourth rotating part (54) is connected between the fourth folding net (4) and the first folding net (1).

2. The folding trolley according to claim 1, characterized in that, The first folding net (1) includes a first end part (11) connected to the first rotating part (51), and a second end part (14) connected to the fourth rotating part (54), and further includes a third end part (12) above the first end part (11), and a fourth end part (13) above the second end part (14); The second folding net (2) includes a fifth end part (24) connected to the first rotating part (51), and a sixth end part (21) connected to the second rotating part (52), and further includes a seventh end part (23) above the fifth end part (24), and an eighth end part (22) above the sixth end part (21); The third folding net (3) includes a ninth end part (34) connected to the second rotating part (52), and a tenth end part (31) connected to the third rotating part (53), and further includes an eleventh end part (33) above the ninth end part (34), and a twelfth end part (32) above the tenth end part (31); The fourth folding net (4) includes a thirteenth end part (44) connected to the third rotating part (53), and a fourteenth end part (41) connected to the fourth rotating part (54), and further includes a fifteenth end part (43) above the thirteenth end part (44), and a sixteenth end part (42) above the fourteenth end part (41).

3. The folding trolley according to claim 2, wherein A fifth rotating part (55) is connected between the third end part (12) and the seventh end part (23); a sixth rotating part (56) is connected between the eighth end part (22) and the eleventh end part (33); A seventh rotating part (57) is connected between the twelfth end part (32) and the fifteenth end part (43); an eighth rotating part (58) is connected between the fifteenth end part (43) and the fourth end part (13).

4. The folding cart according to claim 3, characterized in that, A first guide post (71) is connected to the first rotating part (51), a second guide post (76) is connected to the fourth rotating part (54), the fifth rotating part (55) is provided with a first channel (551) for the first guide post (71) to slide, and the eighth rotating part (58) is provided with a second channel (581) for the second guide post (76) to slide.

5. The folding trolley according to claim 4, characterized in that, The upper end of the first guide post (71) is rotationally connected to a first grip (73) through a first rotating shaft (72); the upper end of the second guide post (76) is rotationally connected to a second grip (74) through a second rotating shaft (75).

6. The folding cart according to claim 5, wherein, A fifth folding net (8) is connected between the first grip (73) and the second grip (74).

7. The folding cart according to claim 6, wherein, The fifth folding net (8) described above includes a first rotating end (81) rotatably connected to the first grip (73), a second rotating end (84) rotatably connected to the second grip (74), and a first sliding end (82) and a second sliding end (83).

8. The folding cart according to any one of claims 1 to 6, characterized in that, The first folding net (1), the second folding net (2), the third folding net (3), and the fourth folding net (4) are respectively provided with a limiting member (9) that restricts their own continuous expansion.

9. The folding cart according to any one of claims 1 to 6, characterized in that, There are a total of 4 wheels (5), which are respectively connected to the first rotating portion (51), the second rotating portion (52), the third rotating portion (53), and the fourth rotating portion (54).

10. The folding cart according to any one of claims 3 to 7, characterized in that, The first rotating portion (51), the second rotating portion (52), the third rotating portion (53), the fourth rotating portion (54), the fifth rotating portion (55), the sixth rotating portion (56), and the eighth rotating portion (58) are all made of flexible rubber.

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