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EP-4674725-B1 - COLLAPSIBLE WAGON AND WAGON WITH HEIGHT REDUCED AFTER BEING FOLDED

EP4674725B1EP 4674725 B1EP4674725 B1EP 4674725B1EP-4674725-B1

Inventors

  • ZHANG, Xiangshan

Dates

Publication Date
20260513
Application Date
20240821

Claims (7)

  1. A wagon with a height reduced after being folded, comprising a collapsible wagon, wherein the collapsible wagon comprises four standing posts (1) arranged in a rectangle pattern and at intervals, a bottom folding mechanism (2) hinged between the four standing posts (1), a first folding mechanism (31), a third folding mechanism (33), a second folding mechanism (32), and a fourth folding mechanism (34) that are arranged in sequence and respectively connected between adjacent two standing posts (1), and first sliding sleeves (41) respectively slidably provided on the standing posts (1), wherein the first sliding sleeves (41) are respectively hinged to short tubes (5); each of the first folding mechanism (31) and the second folding mechanism (32) comprises a first crossing assembly (311) and a second crossing assembly (312); each of the first crossing assembly (311) and the second crossing assembly (312) comprises a first cross tube (3111) and a second cross tube (3112); the first cross tube (3111) is hinged to an upper end of the corresponding standing post (1), and the short tube (5) is hinged to the first cross tube (3111); the short tube (5) is provided with a second sliding sleeve (42); and the second cross tube (3112) is hinged to the second sliding sleeve (42) of the corresponding short tube (5); and folded heights of the first crossing assembly (311), the second crossing assembly (312), the third folding mechanism (33), the fourth folding mechanism (34) and the bottom folding mechanism (2) are not greater than a height of the upper end of the standing post (1); characterized in that each of the first folding mechanism (31) and the second folding mechanism (32) further comprises at least one third crossing assembly (313), the first, third and second crossing assemblies are hinged in sequence; the folded height of the third crossing assembly (313) is not greater than a height of the upper end of the standing post (1); the wagon with the height reduced after being folded further comprises lifting tubes; wherein an end of the lifting tube (100) is hinged to the second sliding sleeve (42), and the lifting tube (100) is slidably connected to the upper end of the corresponding standing post (1); and upper ends of the four lifting tubes (100) are configured to be respectively connected to four corners of a fabric bed of the wagon with the height reduced after being folded; when the collapsible wagon changes from a folded state to an unfolded state, the upper ends of the lifting tubes (100) move vertically away from the upper ends of the standing posts (1) when a wagon frame is unfolded; and when the collapsible wagon changes from the unfolded state to the folded state, the upper ends of the lifting tubes (100) vertically approach the upper ends of the standing posts (1) when the wagon frame is folded; and a height of the collapsible wagon in the folded state is smaller than a height of the collapsible wagon in the unfolded state, and the height of the collapsible wagon is reduced after the collapsible wagon is folded.
  2. The wagon with the height reduced after being folded according to claim 1, characterized in that the collapsible wagon further comprises a first suspension rod (71) and a second suspension rod (72); an upper end of the first suspension rod (71) is hinged to the first folding mechanism (31); an upper end of the second suspension rod (72) is hinged to the second folding mechanism (32); and a lower end of the first suspension rod (71) and a lower end of the second suspension rod (72) are connected to the bottom folding mechanism (2); and the first suspension rod (71) and the second suspension rod (72) are flexible rods; and in a process of folding the collapsible wagon, the first suspension rod (71) and the second suspension rod (72) deform, and the two ends of the first suspension rod (71) respectively approach the two ends of the second suspension rod (72).
  3. The wagon with the height reduced after being folded according to claim 2, characterized in that the bottom folding mechanism (2) comprises a first bottom support assembly (21) and a second bottom support assembly (22) that are symmetrically arranged and hinged to each other; and each of the first bottom support assembly (21) and the second bottom support assembly (22) comprises a first bottom connector (210), a first bottom connecting tube (211), a second bottom connecting tube (212), a third bottom connecting tube (213), and a fourth bottom connecting tube (214); first ends of the first bottom connecting tube (211), the second bottom connecting tube (212), the third bottom connecting tube (213) and the fourth bottom connecting tube (214) are rotatably connected at a limited angle to the first bottom connector (210); and second ends of the first bottom connecting tube (211) and the second bottom connecting tube (212) are respectively rotatably connected at a limited angle to lower ends of corresponding standing posts (1).
  4. The wagon with the height reduced after being folded according to claim 3, characterized in that the bottom folding mechanism (2) further comprises a second bottom connector (216) and a third bottom connector (215) that are symmetrically arranged; and the lower end of the first suspension rod (71) and the lower end of the second suspension rod (72) are respectively connected to the second bottom connector (216) and the third bottom connector (215); the third bottom connecting tube (213) of the first bottom support assembly (21) and the third bottom connecting tube (213) of the second bottom support assembly (22) are rotatably connected at a limited angle to the third bottom connector (215); and the fourth bottom connecting tube (214) of the first bottom support assembly (21) and the fourth bottom connecting tube (214) of the second bottom support assembly (22) are rotatably connected at a limited angle to the second bottom connector (216).
  5. The wagon with the height reduced after being folded according to claim 1, characterized in that the four standing posts (1) are a first standing post (11), a second standing post (12), a third standing post (13), and a fourth standing post (14), respectively; each of the third folding mechanism (33) and the fourth folding mechanism (34) comprises a first crossing tube (341) and a second crossing tube (342) that are hinged to each other, as well as a third crossing tube (343) and a fourth crossing tube (344) that are hinged to each other; first ends of the first crossing tube (341) and the third crossing tube (343) are hinged to each other; and first ends of the second crossing tube (342) and the fourth crossing tube (344) are hinged to each other; in the fourth folding mechanism (34), a second end of the first crossing tube (341) is hinged to an upper end of the fourth standing post (14), a second end of the third crossing tube (343) is hinged to an upper end of the first standing post (11), a second end of the second crossing tube (342) is hinged to the first sliding sleeve (41) on the fourth standing post (14), and a second end of the fourth crossing tube (344) is hinged to the first sliding sleeve (41) on the first standing post (11); and in the third folding mechanism (33), a second end of the first crossing tube (341) is hinged to an upper end of the second standing post (12), a second end of the third crossing tube (343) is hinged to an upper end of the third standing post (13), a second end of the second crossing tube (342) is hinged to the first sliding sleeve (41) on the second standing post (12), and a second end of the fourth crossing tube (344) is hinged to the first sliding sleeve (41) on the third standing post (13).
  6. The wagon with the height reduced after being folded according to claim 1, characterized in that the collapsible wagon further comprises a handle mechanism (6); the handle mechanism (6) comprises a telescopic rod (60), a first horizontal tube (61), a second horizontal tube (62), and a limiting member (63); and the telescopic rod (60) is slidably connected to the limiting member (63); and first ends of the first horizontal tube (61) and the second horizontal tube (62) are respectively rotatably connected at a limited angle to two ends of the limiting member (63); and second ends of the first horizontal tube (61) and the second horizontal tube (62) are respectively rotatably connected to lower ends of two standing posts (1) connected to the fourth folding mechanism (34).
  7. The wagon with the height reduced after being folded according to claim 1, characterized in that the upper ends of the lifting tubes (100) are respectively provided with connecting members (104), and the connecting members (104) are respectively connected to the corners of the fabric bed of the wagon with the height reduced after being folded.

Description

TECHNICAL FIELD The present invention relates to the technical field of wagons, and in particular to a collapsible wagon and a wagon with a reduced height after being folded. BACKGROUND TECHNOLOGY In daily life and production, it is often necessary to use wagons to transport luggage or items. Wagons are widely used because they are convenient, time-saving, and effortless to push. Collapsible wagons are designed for easy storage. Collapsible wagons are lightweight and can be placed on the vehicle after being folded, making them easy to carry. However, the existing collapsible wagon has a small capacity after being unfolded, only to store a small number of items, and has a large volume and takes up a lot of space after being folded. It is especially inconvenient to fold and store the collapsible wagon in a space-limited area such as a car trunk, seriously affecting the user experience. CN219339485U discloses a double-sliding-sleeve gathering trailer. The double-sliding-sleeve gathering trailer comprises a vertical rod assembly, a left side face folding assembly, a right side face folding assembly, a front side face folding assembly, a rear side face folding assembly, a bottom supporting assembly and a wheel assembly, wherein the vertical rod assembly comprises four vertical rods distributed in a rectangular shape, the upper end of each vertical rod is fixedly provided with an upper fixing base, and the lower end of each vertical rod is fixedly provided with a lower fixing base; a linkage sliding sleeve capable of vertically and freely sliding is arranged on each vertical rod. DE202024101319U1 discloses a lower support structure of a hand truck and hand cart. The lower support structure of the hand truck comprises a base and a castor wheel arranged below the base, wherein the base comprises a central joint, at least three link assemblies and at least three corner joints, the first end of each of the link assemblies being hingedly connected to the central joint, the second end of the link assembly being hingedly connected to one of the corner joints, and the corner joint being connected to a castor wheel, so that the base is formed in a foldable structure which is selectively unfolded or folded; each of the link assemblies comprises a first link member and a second link member, wherein when the base is unfolded, the first link member is arranged above the second link member, so that the base is formed in a two-story structure. US2021/107549A1 discloses a folding wagon frame. The folding frame has corner posts including a front right post, a front left post, a rear right post, and a rear left post. Upper corner joints include a front right upper joint on the front right post, a front left upper joint on the front left post, a rear right upper joint on the rear right post, and a rear left upper j oint on the rear left post. Slide joints are slidingly mounted below the upper corner joints on the corner posts and include a front right slide joint on the front right post, a front left slide joint on the front left post, a rear right slide joint on the rear right post, and a rear left slide joint on the rear left post. CONTENT OF THE INVENTION (I) Technical Problem to Be Solved In view of the above defects and shortcomings of the prior art, the present invention is defined in claim 1 and provides a wagon with a height reduced after being folded. The present invention solves the technical problem that the existing collapsible wagon has a small unfolded capacity and a large folded volume. (II) Technical Solution In order to achieve the above objective, a wagon according to claim 1 is provided. Preferred embodiments are defined in the dependent claims. The present disclosure provides a wagon with a height reduced after being folded, comprising a collapsible wagon, wherein the collapsible wagon includes four standing posts arranged in a rectangle pattern and at intervals, a bottom folding mechanism hinged between the four standing posts, a first folding mechanism, a third folding mechanism, a second folding mechanism, and a fourth folding mechanism that are arranged in sequence and respectively connected between adjacent two standing posts, and first sliding sleeves respectively slidably provided on the standing posts, where the first sliding sleeves are respectively hinged to short tubes; each of the first folding mechanism and the second folding mechanisms includes a first crossing assembly, at least one third crossing assembly, and a second crossing assembly that are hinged in sequence; each of the first crossing assembly and the second crossing assembly includes a first cross tube and a second cross tube; the first cross tube is hinged to an upper end of the corresponding standing post, and the short tube is hinged to the first cross tube; the short tube is provided with a second sliding sleeve; and the second cross tube is hinged to the second sliding sleeve of the corresponding short tube; andfolded heights of the