Trailer capable of being folded flatly

Abstract

The utility model relates to the technical field of folding trailers, in particular to a flat folding trailer which comprises a frame assembly and wheels installed at the bottom of the frame assembly, the frame assembly comprises a bottom folding frame and supporting frames located at the front end and the rear end of the bottom folding frame, and the two ends of the bottom folding frame are rotationally connected with the supporting frames on the corresponding sides respectively. The center of the bottom folding frame rotates to drive the two supporting frames to gather together; the side folding frames are located on the left side and the right side, the two ends of each side folding frame are rotationally connected with the supporting frames on the corresponding side, the side folding frames are driven to be folded when the two supporting frames are gathered together, articles can be dragged when the folding frame is used, and a user can conveniently conduct outdoor activities; when not in use, the folding table lamp can be folded and stored, occupies a small volume after being folded, and is convenient to carry when going out.

Description

Technical Field

[0001] This utility model relates to the field of folding vehicle technology, and in particular to a trailer that can be folded flat. Background Technology

[0002] In people's daily lives, we often need to move items. In most cases, this requires manual labor to carry items to their destination, which is not only time-consuming but also laborious. Therefore, folding trolleys have been invented on the market. In such situations, a large number of items can be placed on the trolley and pushed or pulled to the destination. Furthermore, folding trolleys can be folded up, so they do not take up much space when not in use.

[0003] Existing folding vehicles, such as Chinese patent CN221316219U, disclose a campervan folding frame: including a wheel module, a fixing rod, a folding base, and a folding fence frame. The fixing rod is fixedly installed on the wheel module, the folding base can be folded upwards and unfolded downwards and installed on the fixing rod, and the folding fence frame can be retracted inwards and unfolded outwards and installed on the fixing rod. The bottom of the fixing rod is provided with a fixing sleeve, the fixing sleeve is vertically fixed to the wheel module, and the fixing rod is vertically fixed in the fixing sleeve. It also includes an upper sleeve and a sliding sleeve. The upper sleeve is fixedly installed on the top of the fixing rod, and the sliding sleeve is slidably sleeved on the fixing rod.

[0004] When the aforementioned folding bike is folded and stored, the sliding sleeve moves up and down to move the folding frame around it to fold or unfold. After prolonged use, the frame of the bike, especially the surface of the fixing rod, is prone to wear. The wear of the frame then affects the smoothness of the sliding sleeve, resulting in a less than ideal user experience. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides a trailer that can be folded flat. To solve the above-mentioned technical problems, this utility model provides the following technical solution.

[0006] A foldable trailer includes a frame assembly and wheels mounted on the bottom of the frame assembly. The frame assembly includes a bottom folding frame and support frames located at the front and rear ends of the bottom folding frame. The two ends of the bottom folding frame are rotatably connected to the support frames on their respective sides. Rotation of the center of the bottom folding frame causes the two support frames to converge. The trailer also includes side folding frames located on the left and right sides. The two ends of the side folding frames are rotatably connected to the support frames on their respective sides. When the two support frames converge, the side folding frames fold and retract.

[0007] Furthermore, the side folding frame includes two first cross frames located at the beginning and end and one or more rotatably connected second cross frames in the middle, the second cross frames being rotatably connected to the first cross frames.

[0008] Furthermore, the first cross frame includes a first side rod, a second side rod, and a fixed rod. The first side rod and the second side rod intersect but are not fixed. One end of the fixed rod is rotatably connected to the end of the first side rod, and the other end is rotatably connected to the center of the second side rod. The first cross frame can be folded or unfolded by moving the second cross frame and the first side rod through the fixed rod.

[0009] Furthermore, the second cross frame includes two centrally riveted rods.

[0010] Furthermore, the support frame is provided with a fixing member, the two ends of the bottom folding frame are rotatably connected to the fixing member, and the center of the bottom folding frame can be rotatably converged.

[0011] Furthermore, the bottom folding frame includes two base frames on both sides and at least two connectors located at the center of the two base frames, with the connectors located on both sides.

[0012] Furthermore, the connector has downward-facing connecting grooves at both ends, and the two base frames are rotatably connected to the connecting grooves on their respective sides near the connector.

[0013] Furthermore, the bottom folding frame is provided with a support rod, and the two ends of the support rod are respectively connected to two connectors.

[0014] Furthermore, the support frame includes two columns and a support crossbar connecting the two columns, with the support crossbar located at the upper and lower ends.

[0015] Furthermore, the front end of the frame assembly is provided with a handle frame, the end of which is rotatably connected to the support frame; the handle frame includes an outer rod, a retractable inner rod, and a pull ring located at the end of the inner rod.

[0016] Compared with the prior art, the beneficial effects that this utility model can achieve are:

[0017] The frame assembly of this utility model includes a bottom folding frame and support frames located at the front and rear ends of the bottom folding frame. The two ends of the bottom folding frame are rotatably connected to the support frames on their respective sides. Rotating the center of the bottom folding frame causes the two support frames to converge for folding and storage. It also includes side folding frames located on the left and right sides. The two ends of the side folding frames are rotatably connected to the support frames on their respective sides. When the two support frames converge, they also cause the side folding frames to fold and retract. When in use, they can be unfolded to drag items, which is convenient for users to carry outdoors. When not in use, they can be folded and stored. The folded size is small, which is convenient for carrying when going out. Moreover, the structure is relatively simple and the folding method is relatively convenient, which is helpful for manufacturers' production.

[0018] The side folding frame of this design is directly rotatably connected to the support frame. There is no need for the slider to slide during folding, which avoids wear and tear on the frame that may affect the folding process. The side folding frame is folded by a fixed rod on it, and the fixed rod also strengthens the side folding frame, making it more stable and less prone to shaking. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention.

[0020] Figure 2 This is a side view of the present invention.

[0021] Figure 3 This is a bottom view of the present invention.

[0022] Reference numerals: 1. Frame assembly, 2. Wheel, 3. Bottom folding frame, 4. Support frame, 5. Side folding frame, 6. First cross frame, 7. Second cross frame, 8. First side bar, 9. Second side bar, 10. Fixing bar, 11. Bar body, 12. Fixing component, 13. Base frame, 14. Connecting component, 15. Connecting groove, 16. Support bar, 17. Column, 18. Support crossbar, 19. Handle frame, 20. Outer bar, 21. Inner bar, 22. Pull ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-3 As shown, a foldable trailer includes a frame assembly 1 and wheels 3 mounted on the bottom of the frame assembly 1. The frame assembly 1 includes a bottom folding frame 3 and support frames 4 located at the front and rear ends of the bottom folding frame 3. The two ends of the bottom folding frame 4 are rotatably connected to the support frames 4 on their respective sides. Rotating the center of the bottom folding frame 3 causes the two support frames 4 to converge for folding and storage. It also includes side folding frames 5 located on the left and right sides. The two ends of the side folding frames 5 are rotatably connected to the support frames 4 on their respective sides. When the two support frames 4 converge, they also cause the side folding frames 5 to fold and retract. When in use, it can be unfolded to tow items, which is convenient for users to carry outdoors. When not in use, it can be folded and stored. The folded size is small, which is convenient for carrying when going out. Moreover, the structure is relatively simple and the folding method is relatively convenient, which is helpful for manufacturers' production.

[0025] The side folding frame 5 includes two first cross frames 6 located at the beginning and end, and several pairs of rotatably connected second cross frames 7. The second cross frames 7 are rotatably connected to the first cross frames 6. Each first cross frame 6 includes a first side rod 8, a second side rod 9, and a fixing rod 10. The first side rod 8 and the second side rod 9 intersect but are not fixed. The first side rod 8 and the second side rod 9 are rotatably connected to the upper and lower ends of the support frame 4, respectively. One end of the fixing rod 10 is rotatably connected to the end of the first side rod 8, and the other end is rotatably connected to the center of the second side rod 9. When the vehicle is folded and gathered, the first cross frame 6 drives the second cross frames 7 and the first side rod 8 to move through the fixing rod 10, thus folding or unfolding. The intersection point of the first side rod 8 and the second side rod gradually shifts. The side folding frame 5 is folded by the fixing rod 10, which also strengthens the side folding frame 5, making it more stable and less prone to shaking. The second cross frame 7 includes two centrally riveted rods 11, which open and close by rotating at the riveting point. The side folding rack 5 includes multiple second cross racks 7, further extending the length of the vehicle and increasing its cargo space, allowing for the carrying of more items. The side folding rack is directly rotatably connected to the support frame, eliminating the need for sliding sliders during folding and preventing wear and tear on the frame that could affect the folding process.

[0026] The support frame 4 is equipped with a fixing member 12. The two ends of the bottom folding frame 3 are rotatably connected to the fixing member 12, and the center of the bottom folding frame 3 can be rotatably converged. The bottom folding frame 3 includes two base frames 13 on both sides and at least two connecting members 14 located at the center of the two base frames 13. The connecting members 14 are located on both sides. The two ends of the connecting members 14 are provided with downward-facing connecting grooves 15. The two base frames 13 are rotatably connected to the connecting grooves 15 on their respective sides near the connecting members 14. The downward-facing opening of the connecting grooves 15 allows the base frames 13 to only rotate downwards and converge, but not upwards. During folding, the connecting members 14 gradually move upwards, causing the base frames 13 on both sides to rotate downwards. The two base frames 14 then cause the support frame 4 on their respective sides to converge, and the side folding frame 5 rotates and folds synchronously.

[0027] The bottom folding frame 3 is provided with a support rod 16, and the two ends of the support rod 16 are respectively connected to two connectors 14 to increase the stability of the bottom folding frame 3.

[0028] The support frame 4 includes two columns 17 and a support crossbar 18 connected between the two columns 17, with the support crossbar 18 located at the upper and lower ends.

[0029] The front end of the frame assembly 1 is provided with a handle frame 19, which is used to pull the vehicle. The end of the handle frame 19 is rotatably connected to the support frame 4, which is suitable for people of different heights to pull. When not in use, it can be rotated and brought closer to the frame assembly 1 to reduce the volume occupied.

[0030] The handle frame 19 includes an outer rod 20, a telescopic inner rod 21, and a pull ring 22 located at the end of the inner rod. The handle frame 19 is telescopic and adjustable to accommodate people of different heights. The pull ring 22 at the top can be gripped to prevent slipping.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A foldable trailer, comprising a frame assembly and wheels mounted on the bottom of the frame assembly, characterized in that, The frame assembly includes a bottom folding frame and support frames located at the front and rear ends of the bottom folding frame. The two ends of the bottom folding frame are rotatably connected to the support frames on their respective sides. The rotation of the center of the bottom folding frame causes the two support frames to converge. It also includes side folding frames located on the left and right sides. The two ends of the side folding frames are rotatably connected to the support frames on their respective sides. When the two support frames converge, the side folding frames are folded and retracted.

2. A foldable trailer according to claim 1, characterized in that, The side folding frame includes two first cross frames located at the beginning and end and one or more second cross frames rotatably connected in the middle, with the second cross frames rotatably connected to the first cross frames.

3. A foldable trailer according to claim 2, characterized in that, The first cross frame includes a first side rod, a second side rod, and a fixed rod. The first side rod and the second side rod intersect but are not fixed. One end of the fixed rod is rotatably connected to the end of the first side rod, and the other end is rotatably connected to the center of the second side rod. The first cross frame can be folded or unfolded by moving the second cross frame and the first side rod through the fixed rod.

4. A foldable trailer according to claim 3, characterized in that, The second cross frame includes two centrally riveted rods.

5. A foldable trailer according to claim 1, characterized in that, The support frame is equipped with a fixing component, and the two ends of the bottom folding frame are rotatably connected to the fixing component. The center of the bottom folding frame can be rotatably converged.

6. A foldable trailer according to claim 5, characterized in that, The bottom folding frame includes two base frames on both sides and at least two connectors located at the center of the two base frames, with the connectors located on both sides.

7. A foldable trailer according to claim 6, characterized in that, The connector has downward-facing connecting grooves at both ends, and the two base frames are rotatably connected to the connecting grooves on their respective sides near the connector.

8. A foldable trailer according to claim 7, characterized in that, The bottom folding frame is equipped with a support rod, and the two ends of the support rod are respectively connected to two connectors.

9. A foldable trailer according to claim 1, characterized in that, The support frame includes two columns and a support crossbar connecting the two columns, with the support crossbar located at the upper and lower ends.

10. A foldable trailer according to claim 1, characterized in that, The front end of the frame assembly is provided with a handle frame, and the end of the handle frame is rotatably connected to the support frame; the handle frame includes an outer rod, a retractable inner rod, and a pull ring located at the end of the inner rod.

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