Folding trailer

Abstract

The utility model discloses a folding trailer which comprises a trailer frame body, a trapezoid supporting plate is fixedly connected to the middle of the trailer frame body, rotating shaft sleeves are rotationally connected to the two sides of one end of the lower portion of the trailer frame body, and limiting connecting bases are fixedly connected to the outer walls of the two rotating shaft sleeves. Limiting clamping blocks are fixedly connected to the lower portions of the ends, close to the rotating shaft sleeve, of the two limiting connecting bases, wheel assemblies are rotationally connected to the ends, away from the rotating shaft sleeve, of the two limiting connecting bases, and a bottom plate is rotationally connected to the end of one end of the lower portion of the frame body. The limiting convex seat and the limiting arc groove are arranged between the bottom plate and the frame body, the limiting convex seat and the limiting arc groove are matched with the limiting piece base and the V-shaped reed, when the bottom plate is opened in a rotating mode, the V-shaped reed on the limiting piece base is jacked up by the inclined face of the limiting convex seat on the bottom plate to slide into the limiting arc groove, and the V-shaped reed is matched with the limiting clamping groove corresponding to the limiting connecting seat. And the bottom plate and the wheel assembly are relatively limited.

Description

Technical Field

[0001] The utility model relates to the technical field of hand trailers, in particular to a folding trailer. Background Art

[0002] Hand trailers are widely used and indispensable in life. From buying groceries to transporting, hand trailers are needed in various scenarios. Folding trailers are widely popular in daily life due to their unique design and practicality; their main advantages include: convenient storage and carrying: the folding trailer adopts a folding design, which is compact when folded, easy to store and carry. Whether it is placed in a corner of the home, in the trunk of the car or in the storage room, it can be easily stored without taking up space; versatility: folding trailers are not only suitable for daily scenarios such as shopping, setting up stalls, buying groceries, but also for outdoor travel, picnics, etc., to meet a variety of needs; stable and durable: some folding trailers are made of metal or wear-resistant and non-slip materials, with a solid structure and strong load-bearing capacity. They can remain stable even on uneven roads and reduce bumps.

[0003] The floor of an existing folding trailer is generally directly hinged to the bottom axle. After it is opened, the floor is generally stabilized by the pressure of the cargo. Before the cargo is placed, the floor is movable relative to the cart. If it is pushed forward slightly, the floor will easily fold and the entire cart will fall over, posing a risk of tripping people. It is very unsafe and can only be pulled or carried, which is inconvenient to use and has room for further improvement. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a folding trailer that solves the above problem.

[0005] To achieve the above object, a foldable trailer is provided, comprising a frame body, a trapezoidal support plate fixedly connected to the middle portion of the frame body, telescopic pull rods provided on both sides of the upper portion of the frame body, an end of the telescopic pull rod away from the trapezoidal support plate fixedly connected to a trailer handle, a pull rod telescopic switch provided on the inner side of the trailer handle, a finger groove design provided on the grip of the trailer handle to improve grip comfort, and a widened spacing between the pull rod telescopic switch and the trailer handle. By increasing the space design, fingers are prevented from easily touching the pull rod telescopic switch when gripping, making gripping the handle more convenient and comfortable.

[0006] The top of described sliding panel also is provided with an interlocking plate, and the interlocking plate is hinged on the base plate, is fixed with a backing pin on the interlocking plate, and an end of sliding panel withstands on the backing pin of interlocking plate.

[0007] According to the folding trailer, the wheel assembly is a wheel that is directly rotatably connected to the limiting connecting seat.

[0008] According to the folding trailer, the wheel assembly includes a triangular planetary carrier and three planetary wheels. The center of the triangular planetary carrier is rotatably connected to the limit connecting seat, and the three ends of the triangular planetary carrier are respectively rotatably connected to the corresponding planetary wheels.

[0009] According to the folding trailer, the two rotating seats are respectively connected to the two side end pins of the frame body through a fixing pin, and the two limiting member bases are both limitedly engaged with the two side end portions of the frame body through the same fixing pin.

[0010] According to the folding trailer, a box frame is fixedly connected to the upper middle portion of the frame body, and a box cover is provided in the middle portion of the box frame.

[0011] According to the folding trailer, the connection points on both sides of the box frame and the frame body are provided with binding slots, and the outer sides of both ends of the trailer handle are fixedly connected with hanging platforms.

[0012] According to the folding trailer, a detachable net bag is provided on one side of the trapezoidal support plate close to the wheel assembly.

[0013] According to the folding trailer, the maximum angle between the frame body and the bottom plate is 95 degrees. When fully opened, the force point passes the highest point of the arc to form a downward negative angle.

[0014] The above solution has at least one of the following beneficial effects:

[0015] 1. A limiting convex seat and a limiting arc groove are provided between the bottom plate and the frame body of the utility model. In conjunction with the limiting member base and the V-shaped spring piece, when the bottom plate is rotated to open, the V-shaped spring piece on the limiting member base is lifted up by the inclined surface of the limiting convex seat on the bottom plate and slides into the limiting arc groove. In conjunction with the limiting card groove corresponding to the limiting connecting seat, the bottom plate and the wheel assembly are relatively limited. The overall structure can simultaneously play a positioning role for the bottom plate and the wheel assembly, thereby enhancing the practicality of the device.

[0016] 2. The utility model is provided with a box frame and a box cover, which can form a small storage box for storing elastic ropes and gloves. In addition, through the bundling slots opened on the side of the box frame and the hanging platform on the trailer handle, goods of different heights can be bundled, thereby enhancing the practicality of the device.

[0017] 3. The wheel assembly provided in the present invention can be replaced with a three-wheel structure that is convenient for going up and down stairs or a lighter single-wheel structure according to the situation, thereby expanding the use scenarios of the folding trailer.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is a schematic top view of the three-dimensional structure of a folding trailer of the present invention;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of a folding trailer according to the present invention when viewed from above;

[0022] Figure 3 This is a schematic diagram of the internal structure of a rotating seat of a folding trailer of the present invention;

[0023] Figure 4 This is a schematic structural diagram of the second embodiment of the present utility model;

[0024] Figure 5 for Figure 2 Enlarged view of point A.

[0025] Legend:

[0026] 1. Frame body; 2. Trapezoidal support plate; 3. Telescopic pull rod; 4. Trailer handle; 5. Pull rod telescopic switch; 6. Rotating shaft sleeve; 7. Limit connecting seat; 8. Wheel assembly; 9. Bottom plate; 10. Rotating seat; 11. Fixing pin; 12. Limiting cam; 13. Limiting arc groove; 14. Limiting member base; 15. V-shaped spring; 16. Limiting card slot; 17. Box frame; 18. Box cover; 19. Bundling card slot; 20. Hanging platform; 21. Removable mesh bag; 22. Limiting card block. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0028] Example 1

[0029] Reference Figure 1-3 5. The present invention provides a folding trailer, comprising a frame body 1, a trapezoidal support plate 2 being fixedly connected to the middle of the frame body 1, telescopic pull rods 3 being provided on both sides of the upper portion of the frame body 1, a trailer handle 4 being fixedly connected to one end of the telescopic pull rod 3 away from the trapezoidal support plate 2, and a pull rod telescopic switch 5 being provided on the inner side of the trailer handle 4;

[0030] The two ends of the two limiting connection seats 7 are fixedly connected to the limiting block 22 below the end of the two limiting connection seats 7 close to the rotating sleeve 6. The two limiting connection seats 7 are rotatably connected to the wheel assembly 8 at the end away from the rotating sleeve 6. The wheel assembly 8 is a wheel that is directly rotatably connected to the limiting connection seat 7. The end of the lower end of the frame body 1 is rotatably connected to the bottom plate 9. The maximum angle between the frame body 1 and the bottom plate 9 is 95 degrees. The upper and lower sides of the bottom plate 9 are fixedly connected to the positions corresponding to the frame body 1. The inner bottom of the rotating seat 10 is provided with a limiting convex seat 12. The tops of the two limiting convex seats 12 are provided with a limiting arc groove 13. The two end portions of the frame body 1 are inlaid with a limiting member base 14. The two rotating seats 10 are respectively connected to the two end portions of the frame body 1 by a fixing pin 11. The two limiter bases 14 are both limitedly connected to the ends of the frame body 1 on both sides through the same fixing pin 11. The ends of the two limiter bases 14 corresponding to the limit convex seat 12 are both provided with V-shaped springs 15, and the end shape of the V-shaped springs 15 corresponds to the shape of the limit arc groove 13. The middle part of one end of the two rotating seats 10 close to the limit connecting seat 7 is provided with a limit card groove 16 corresponding to the limit card block 22. By setting a limit between the bottom plate 9 and the frame body 1 The convex seat 12 and the limiting arc groove 13 cooperate with the limiting member base 14 and the V-shaped spring 15. When the bottom plate 9 is rotated to open, the V-shaped spring 15 on the limiting member base 14 is lifted by the inclined surface of the limiting convex seat 12 on the bottom plate 9 and slides into the limiting arc groove 13, and cooperates with the limiting card groove 16 corresponding to the limiting card block 22 of the limiting connecting seat 7, so that the bottom plate 9 and the wheel assembly 8 are relatively limited, thereby enabling the limiting structure to simultaneously position the bottom plate 9 and the wheel assembly 8;

[0031] A box frame 17 is fixedly connected to the middle of the upper part of the frame body 1, and a box cover 18 is provided in the middle of the box frame 17, which can form a small storage box for storing elastic ropes and gloves. Bundling slots 19 are provided at the connection between the box frame 17 and the frame body 1 on both sides. Hanging platforms 20 are fixedly connected to the outer sides of both ends of the trailer handle 4, which can be used for bundling goods of different heights. A detachable mesh bag 21 is provided on the side of the trapezoidal pallet 2 close to the wheel assembly 8, which can be used to place items.

[0032] Example 2

[0033] according to Figure 4 The difference between this embodiment and the first embodiment is that the wheel assembly 8 includes a triangular planetary carrier and three planetary wheels. The center of the triangular planetary carrier is rotatably connected to the limit connecting seat 7, and the three ends of the triangular planetary carrier are respectively rotatably connected to the corresponding planetary wheels, so that the cart can be used in a stair environment, which is convenient for users who need to climb stairs.

[0034] Working principle: When the present invention is in use, by arranging a limiting protrusion 12 and a limiting arc groove 13 between the bottom plate 9 and the frame body 1, in conjunction with the limiting member base 14 and the V-shaped spring 15, when the bottom plate 9 is rotated to open, the V-shaped spring 15 on the limiting member base 14 is lifted up by the inclined surface of the limiting protrusion 12 on the bottom plate 9 and slides into the limiting arc groove 13, and cooperates with the limiting card groove 16 corresponding to the limiting card block 22 of the limiting connecting seat 7, so that the bottom plate 9 and the wheel assembly 8 are relatively limited, so that the structure can play a positioning role for the bottom plate 9 and the wheel assembly 8 at the same time.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A folding trailer, comprising a frame body (1), characterized in that: The middle of the frame body (1) is fixedly connected to a trapezoidal support plate (2), telescopic pull rods (3) are provided on both sides above the frame body (1), one end of the telescopic pull rod (3) away from the trapezoidal support plate (2) is fixedly connected to a trailer handle (4), and a pull rod telescopic switch (5) is provided on the inner side of the trailer handle (4); The lower end of the frame body (1) is rotatably connected to a rotating shaft sleeve (6) on both sides, the outer walls of the two rotating shaft sleeves (6) are fixedly connected to a limited connection seat (7), the lower ends of the two limited connection seats (7) close to the rotating shaft sleeve (6) are fixedly connected to a limited block (22), the ends of the two limited connection seats (7) away from the rotating shaft sleeve (6) are rotatably connected to a wheel assembly (8), the lower end of the frame body (1) is rotatably connected to a bottom plate (9), and the upper two sides of the bottom plate (9) are fixedly connected to rotating seats (10) at positions corresponding to the frame body (1). A limiting convex seat (12) is provided at the lower part of the interior of the rotating seat (10), and a limiting arc groove (13) is provided on the top of the two limiting convex seats (12). The two end portions of the frame body (1) are inlaid with limiting member bases (14). The ends of the two limiting member bases (14) corresponding to the limiting convex seat (12) are provided with V-shaped spring pieces (15), and the shape of the end portions of the V-shaped spring pieces (15) corresponds to the shape of the limiting arc groove (13). A limiting card groove (16) corresponding to the limiting card block (22) is provided in the middle of one end of the two rotating seats (10) close to the limiting connecting seat (7).

2. A folding trailer according to claim 1, characterized in that: The wheel assembly (8) is a wheel that is directly rotationally connected to the limiting connection seat (7).

3. The folding trailer according to claim 1, characterized in that: The wheel assembly (8) comprises a triangular planetary frame and three planetary wheels. The center of the triangular planetary frame is rotatably connected to the limit connection seat (7), and the three ends of the triangular planetary frame are rotatably connected to the corresponding planetary wheels.

4. The folding trailer according to claim 1, characterized in that: The two rotating seats (10) are respectively connected to the two side end pins of the frame body (1) through a fixing pin (11), and the two limiting member bases (14) are both limitedly engaged with the two side end pins of the frame body (1) through the same fixing pin (11).

5. The folding trailer according to claim 1, characterized in that: A box frame (17) is fixedly connected to the upper middle portion of the vehicle frame body (1), and a box cover (18) is provided in the middle portion of the box frame (17).

6. A folding trailer according to claim 5, characterized in that: The connection points on both sides of the box frame (17) and the vehicle frame body (1) are both provided with binding slots (19), and the outer sides of both ends of the trailer handle (4) are both fixedly connected with hanging platforms (20).

7. The folding trailer according to claim 1, characterized in that: A detachable mesh bag (21) is provided on one side of the trapezoidal support plate (2) close to the wheel assembly (8).

8. The folding trailer according to claim 1, characterized in that: The maximum angle between the frame body (1) and the bottom plate (9) is 95 degrees.

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