Anti-rollover structure of folding bicycle

Abstract

The utility model discloses an anti-rollover structure of a folding bicycle, which relates to the technical field of carts and comprises a fixed frame, movable holes are arranged on the inner walls of four sides of the fixed frame, screws are movably mounted in the four movable holes, two ends of each screw extend out of the corresponding movable hole, nuts are sleeved on the four screws in a threaded manner, and the nuts are connected with the fixed frame in a threaded manner. The side portions, away from each other, of the four nuts make contact with the inner walls of the four sides of the fixing frame correspondingly, and anti-overturning assemblies are installed at the ends, away from the fixing frame, of the four screws. During use, the four U-shaped plates are aligned to the four side parts of the vehicle plate, and then the four nuts are rotated in sequence, so that the four U-shaped plates can clamp the four side parts of the vehicle plate, and the vehicle plates of folding vehicles with different lengths and widths can be clamped; the probability that the folding cart turns over from the four sides is reduced, and use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a trolley technical field, concretely is a folding car anti -rollover structure. BACKGROUND

[0002] In most logistics transfer processes, flat trolleys are often used to transfer goods. Flat trolleys are widely used in daily life and have the advantages of light weight, high strength, low cost, simple maintenance, and easy operation, making them very convenient for short-distance transportation of goods.

[0003] In the prior art, a comparison document with the document number CN221757563U discloses an anti-toppling foldable trolley. The handrails of the trolley can be folded, but it does not have an anti-toppling structure. In addition, the prior art document with the document number CN221986456U discloses a bottom plate foldable anti-toppling portable flat trolley. However, it can only prevent toppling in one direction. After being loaded with goods, if jolting or other unexpected situations occur during movement, the goods and the folding trolley are likely to topple from the four sides. The anti-toppling ability of this device is poor, and the anti-toppling structure is fixed with the trolley body and cannot be installed and used at any time according to folding trolleys of different lengths and widths. Therefore, we disclose a folding car anti-rollover structure. SUMMARY

[0004] The folding car anti-rollover structure provided by the utility model can clamp the four sides of the trolley plate by four U-shaped plates when in use, can clamp the trolley plates of folding trolleys of different lengths and widths, and can reduce the probability of folding trolleys toppling from the four sides through the arrangement of four anti-rollover assemblies. The utility model is convenient to use and solves the problem that the traditional structure can only prevent toppling in one direction and cannot be used for folding trolleys of different widths and lengths.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a folding car anti-rollover structure, comprising a fixed frame, four side inner walls of the fixed frame are provided with movable holes, four movable holes are movably installed with screw rods, both ends of the screw rods extend out of the movable holes, four screw rods are all threaded with nuts, the sides of the four nuts away from each other are respectively in contact with the four side inner walls of the fixed frame, and the ends of the four screw rods away from the fixed frame are installed with anti-rollover assemblies.

[0006] The anti-rollover assembly comprises a mounting block fixedly mounted at the end of the screw rod away from the fixed frame, a U-shaped plate fixedly mounted at the top of the mounting block, two mounting plates fixedly mounted at the end of the U-shaped plate away from the fixed frame, a round hole formed at the side of each of the two mounting plates, a rotating shaft rotatably mounted in each of the two round holes, a rotating block fixedly sleeved on the rotating shaft and located between the two mounting plates, a supporting column fixedly mounted at the top of the rotating block, and the supporting column is parallel to the U-shaped plate.

[0007] As a preferred technical scheme of the utility model, the side of each of the two mounting plates is in contact with the two sides of the rotating block.

[0008] As a preferred technical scheme of the utility model, the anti-rollover assembly further comprises a fixed block fixedly mounted at the side of one of the U-shaped plates, a sliding hole formed at the top of the fixed block, a plug rod slidably mounted in the sliding hole, two clamping grooves formed at the side of the rotating shaft, and the top end of the plug rod extends into one of the clamping grooves.

[0009] As a preferred technical scheme of the utility model, the anti-rollover assembly further comprises a pulling block fixedly mounted at the bottom end of the plug rod, a spring sleeved on the plug rod, and the top end and the bottom end of the spring are fixedly mounted at the sides of the fixed block and the pulling block, respectively.

[0010] As a preferred technical scheme of the utility model, the obtuse angle formed by the two clamping grooves and the central axis of the rotating shaft is greater than 225 degrees and less than 270 degrees.

[0011] As a preferred technical scheme of the utility model, a gap is left between the sides of the rotating block and the U-shaped plate.

[0012] As a preferred technical scheme of the utility model, the four screw rods are in the same horizontal plane.

[0013] Compared with the prior art, the utility model provides an anti-rollover structure of a folding cart, which has the following beneficial effects:

[0014] In the utility model, in use, the four U-shaped plates are aligned with the four sides of the cart plate, and then the four nuts are rotated in sequence, so that the four U-shaped plates can clamp the four sides of the cart plate, and can clamp the cart plate of the folding cart with different lengths and widths, and through the arrangement of the four anti-rollover assemblies, the probability of the folding cart rolling over from the four sides is reduced, and the utility model is convenient to use.

[0015] The utility model discloses a fixing frame, movable hole, screw rod, nut, mounting block, U-shaped plate, mounting plate, rotating block, support column, pivot, fixed block, plug rod, pull block, spring, card slot, handrail, car plate are connected to the folding car anti -rollover structure of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the first perspective schematic diagram that the folding car anti -rollover structure of the utility model is connected with car plate.

[0017] Figure 2 It is the perspective schematic diagram that the fixing frame, nut, screw rod and anti -rollover subassembly of the folding car anti -rollover structure of the utility model are connected.

[0018] Figure 3 It is the second perspective schematic diagram that the folding car anti -rollover structure of the utility model is connected with car plate.

[0019] Figure 4 It is Figure 3 It is the enlarged view of A in the middle.

[0020] In the drawing: 1, fixed frame, 2, movable hole, 3, screw rod, 4, nut, 5, mounting block, 6, U-shaped plate, 7, mounting plate, 8, rotating block, 9, support column, 10, pivot, 11, fixed block, 12, plug rod, 13, pull block, 14, spring, 15, card slot, 16, handrail, 17, car plate. DETAILED DESCRIPTION

[0021] The utility model will be further explained below in combination with specific embodiment, however, people skilled in the art should understand that the detailed description given in combination with the drawings is to explain better, and the structure of the utility model is bound to exceed these limited embodiments, and for some equivalent replacement scheme or common means, this paper will not make detailed description, but still belongs to the protection scope of the application.

[0022] Figures 1-3 It is the best embodiment of the utility model, and the following will be combined with the drawings Figures 1-4 The utility model will be further explained.

[0023] The utility model discloses a folding car anti -rollover structure, including fixed frame 1, the four sides inner wall of fixed frame 1 all are equipped with movable hole 2, four movable hole 2 are movably installed with screw rod 3, and both ends of screw rod 3 all extend to movable hole 2 outside, and four screw rod 3 all are threadedly connected with nut 4, and the side portion of four nuts 4 away from each other is contacted with the four sides inner wall of fixed frame 1 respectively, and the one end of four screw rod 3 away from fixed frame 1 is installed with anti -rollover subassembly, and four screw rod 3 is in the same horizontal plane.

[0024] In use, the upper portion of the car plate 17 is provided with a handrail 16, which can be folded, and the folding manner can refer to the folding manner disclosed in the anti-toppling foldable cart with publication number CN221757563U.

[0025] The anti-rollover subassembly includes a mounting block 5 fixedly installed at the end of the screw rod 3 away from the fixed frame 1, a U-shaped plate 6 fixedly installed at the top of the mounting block 5, two mounting plates 7 fixedly installed at the side of the U-shaped plate 6 away from the fixed frame 1, circular holes formed at the sides of the two mounting plates 7 approaching each other, a rotating shaft 10 rotatably installed in the two circular holes, a rotating block 8 fixedly sleeved on the rotating shaft 10 and located between the two mounting plates 7, a support column 9 fixedly installed at the top of the rotating block 8, and the support column 9 is parallel to the U-shaped plate 6. A gap is left between the sides of the rotating block 8 and the U-shaped plate 6 approaching each other, which does not affect the rotation of the rotating block 8.

[0026] By the above structure: in use, the four U-shaped plates 6 are aligned with the four sides of the car plate 17, and then the four nuts 4 are rotated in sequence, so that the four U-shaped plates 6 can clamp the four sides of the car plate 17, and can clamp the car plate 17 of the folding cart with different length and width, and through the setting of the four anti-rollover subassemblies, the probability of the folding cart rolling over from the four sides is reduced, which is convenient to use.

[0027] The sides of the two mounting plates 7 approaching each other are in contact with the two sides of the rotating block 8. This setting is used to limit the rotating block 8 so that it can only rotate.

[0028] The anti-rollover subassembly further includes a fixed block 11 fixedly installed at the side of one of the U-shaped plates 6, a sliding hole formed at the top of the fixed block 11, a plug rod 12 slidably installed in the sliding hole, two clamping grooves 15 formed at the side of the rotating shaft 10, and the top end of the plug rod 12 extending into one of the clamping grooves 15. The anti-rollover subassembly further includes a pull block 13 fixedly installed at the bottom end of the plug rod 12, a spring 14 sleeved on the plug rod 12, and the top end and the bottom end of the spring 14 fixedly installed on the sides of the fixed block 11 and the pull block 13 approaching each other, respectively.

[0029] In the embodiment, the pulling block 13 is pulled to move the insertion rod 12 out of one of the clamping grooves 15, the pulling block 13 is moved to deform the spring 14, then the rotating block 8 is rotated to be inclined downward, at this time, the bottom end of the rotating block 8 is not in contact with the ground, in the process, the insertion rod 12 is correspondingly positioned in the other clamping groove 15, the pulling block 13 is moved upward under the reaction force of the spring 14, so that the insertion rod 12 is clamped in the other clamping groove 15, and the fixing is completed.

[0030] The obtuse angle formed by the two clamping grooves 15 and the axis of the rotating shaft 10 is greater than 225 degrees and less than 270 degrees.

[0031] The working principle and use process of the utility model are as follows: in use, the four U-shaped plates 6 are aligned with the four side portions of the plate 17, then the four nuts 4 are rotated in sequence, so that the four U-shaped plates 6 clamp the four side portions of the plate 17, and the plate 17 of the folding vehicle with different lengths and widths can be clamped.

[0032] In the embodiment, the pulling block 13 is pulled to move the insertion rod 12 out of one of the clamping grooves 15, the pulling block 13 is moved to deform the spring 14, then the rotating block 8 is rotated to be inclined downward, at this time, the bottom end of the rotating block 8 is not in contact with the ground, in the process, the insertion rod 12 is correspondingly positioned in the other clamping groove 15, the pulling block 13 is moved upward under the reaction force of the spring 14, so that the insertion rod 12 is clamped in the other clamping groove 15, and the fixing is completed.

[0033] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in other forms, and any skilled person in the art can modify or change the above disclosed technical content into equivalent embodiments. However, any simple modification, equivalent change and modification of the above embodiments without departing from the technical solution of the utility model, according to the technical essence of the utility model, still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A folding vehicle anti-rollover structure comprising a fixed frame (1), characterized in that: The four side inner walls of the fixed frame (1) are provided with movable holes (2), four screw rods (3) are movably installed in the four movable holes (2), both ends of the screw rod (3) extend out of the movable hole (2), four nuts (4) are threadedly connected on the four screw rods (3), the mutually far apart sides of the four nuts (4) are in contact with the four side inner walls of the fixed frame (1), and an anti-turning assembly is installed at the end of the screw rod (3) away from the fixed frame (1). The anti-turning assembly comprises a mounting block (5) fixedly installed at the end of the screw rod (3) away from the fixed frame (1), a U-shaped plate (6) is fixedly installed on the top of the mounting block (5), two mounting plates (7) are fixedly installed on the side of the U-shaped plate (6) away from the fixed frame (1), a circular hole is formed in the mutually close sides of the two mounting plates (7), a rotating shaft (10) is rotatably installed in the two circular holes, a rotating block (8) is fixedly connected on the rotating shaft (10) between the two mounting plates (7), a supporting column (9) is fixedly installed on the top of the rotating block (8), and the supporting column (9) is parallel to the U-shaped plate (6).

2. The roll-over protection structure of claim 1, wherein: The mutually close sides of the two mounting plates (7) are in contact with the two sides of the rotating block (8).

3. The roll-over protection structure of claim 1, wherein: The anti-turning assembly further comprises a fixed block (11) fixedly installed on the side of one of the U-shaped plates (6), a sliding hole is formed in the top of the fixed block (11), a plug rod (12) is slidably installed in the sliding hole, two clamping grooves (15) are formed in the side of the rotating shaft (10), and the top end of the plug rod (12) extends into one of the clamping grooves (15).

4. The roll-over protection structure of claim 3, wherein: The anti-turning assembly further comprises a pulling block (13) fixedly installed at the bottom end of the plug rod (12), a spring (14) is sleeved on the plug rod (12), and the top end and the bottom end of the spring (14) are fixedly installed on the mutually close sides of the fixed block (11) and the pulling block (13) respectively.

5. The roll-over protection structure of claim 3, wherein: The obtuse angle formed by the two clamping grooves (15) and the central axis of the rotating shaft (10) is greater than 225 degrees and less than 270 degrees.

6. The roll-over protection structure of claim 1, wherein: A gap is formed between the mutually close sides of the rotating block (8) and the U-shaped plate (6).

7. The roll-over protection structure of claim 1, wherein: The four screw rods (3) are in the same horizontal plane.

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