Foldable large trailer

Abstract

The utility model discloses a foldable large-size trailer which comprises four scissor-fork type telescopic frames, the tops of the four scissor-fork type telescopic frames are all rotationally connected with connecting bases, the bottoms of the four scissor-fork type telescopic frames are all rotationally connected with assembling bases, the bottoms of the four assembling bases are all provided with assembling grooves, the inner walls of the assembling grooves are fixedly connected with springs, and the springs are fixedly connected with the connecting bases. The bottoms of the assembly bases are provided with quick release mechanisms, and the outer walls of the two assembly bases are rotationally connected with U-shaped sleeves. By arranging the assembling seat, the mounting seat, the movable seat, the strip-shaped groove, the fixed rod and the fixed seat, the four scissor-fork type telescopic frames form a rectangular structure of the trailer body and support and limit the rectangular structure, so that under the condition that the connecting strength is not influenced, the using number of connecting pieces of the trailer body is reduced, and production and mounting are facilitated; and by arranging a cross column, a spring, a pressing block and a positioning hole, the wheel can be subjected to quick disassembly operation and can be independently stored.

Description

Technical Field

[0001] The utility model relates to the technical field of trailers, in particular to a large-sized foldable trailer. Background Art

[0002] The main functions of a folding trailer include portability, versatility, space saving and practicality. Portability: The design of a folding trailer takes portability into account to the greatest extent. It can be easily folded and unfolded, facilitating carrying and storage. This feature makes the folding trailer very suitable for outdoor activities, travel, camping and other occasions. Users can deploy it for use as needed and easily fold and store it when not needed. Versatility: In addition to being a transportation tool, a folding trailer can also play multiple roles according to different usage scenarios. For example, it can be used as an auxiliary tool for shopping to help carry a large number of items; in outdoor activities, it can be used as a temporary workbench or storage space.

[0003] In the prior art, when a folding trailer is telescoped, various scissor-type rods are used for telescoping. Since it is necessary to limit and support its bottom during the telescoping process, multiple accessories are used for separate connection, resulting in a large number of connectors, making production and installation more cumbersome. And generally, the wheels are fixed to the bottom of the trailer body and cannot be separately stored during storage. Therefore, we propose a large-sized foldable trailer to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages existing in the prior art and propose a large-sized foldable trailer.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A large-sized foldable trailer includes four scissor-type telescopic frames. The tops of the four scissor-type telescopic frames are all rotatably connected with connection seats, and the bottoms of the four scissor-type telescopic frames are all rotatably connected with assembly seats. Assembly grooves are formed at the bottoms of the four assembly seats, springs are fixedly connected to the inner walls of the assembly grooves, a quick-release mechanism is arranged at the bottom of the assembly seats. The outer walls of two of the assembly seats are rotatably connected with U-shaped sleeves, the inner walls of the two U-shaped sleeves are both rotatably connected with connecting rods, one ends of the two connecting rods are rotatably connected to the same connecting plate. Four mounting seats and two movable seats are rotatably connected to the bottoms of two of the scissor-type telescopic frames. Two strip-shaped grooves are formed in the outer walls of the mounting seats and the movable seats.

[0007] Preferably, the quick-release mechanism includes four pressing blocks. One end of each of the four springs is fixedly connected to the outer wall of each pressing block. A positioning hole is formed in the outer wall of the pressing block, and a cross-shaped column is slidably connected to the inner wall of the positioning hole. The bottom of the cross-shaped column is fixedly connected to a wheel. By providing the quick-release mechanism, the wheel can be quickly removed from the mounting seat for separate storage.

[0008] Preferably, a telescopic rod is fixedly connected to the top of each of the four mounting seats, and the top of the telescopic rod is fixedly connected to the bottom of the connecting seat. By providing the telescopic rod, it assists the four scissor-type telescopic frames in telescoping.

[0009] Preferably, a rectangular sliding hole is formed in the outer wall of the mounting seat, and the inner wall of the rectangular sliding hole is slidably connected to the outer wall of the pressing block. By providing the pull rod, it drives the whole to move through the four wheels.

[0010] Preferably, two sliding holes are formed in the outer wall of the connecting plate, and the same pull rod is slidably connected to the inner walls of the two sliding holes.

[0011] Preferably, a fixing rod is rotatably connected to the outer walls of the mounting seat, the movable seat and the connecting seat. One end of each of the four fixing rods is rotatably connected to the same fixing seat. By providing the fixing seat, the supporting strength of the bottom is increased, and the plurality of fixing rods are installed in a crosswise manner.

[0012] Compared with the prior art, the advantages of the present utility model are as follows:

[0013] In this solution, by providing the mounting seat, the mounting base, the movable seat, the strip-shaped groove, the fixing rod and the fixing seat, the four scissor-type telescopic frames form a rectangular structure of the trailer body, and it is supported and limited. Without affecting the connection strength, the number of connecting parts of the trailer body is reduced, which is convenient for production and installation; by providing the cross-shaped column, the spring, the pressing block and the positioning hole, the wheel can be quickly disassembled for separate storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for use in the following description of the specific embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a foldable large trailer proposed by the present utility model;

[0016] Figure 2 It is a cross-sectional structural schematic diagram of a foldable large trailer proposed by the present utility model;

[0017] Figure 3 The enlarged structural schematic diagram of part A in Figure 2 a large-sized foldable trailer proposed by the present utility model;

[0018] Figure 4 The structural schematic diagram of the pressing block and positioning hole of a large-sized foldable trailer proposed by the present utility model;

[0019] Figure 5 The structural schematic diagram of the mounting seat of a large-sized foldable trailer proposed by the present utility model;

[0020] Figure 6 The structural schematic diagram of the movable seat and strip groove of a large-sized foldable trailer proposed by the present utility model;

[0021] Figure 7 The structural schematic diagram of the fixed seat of a large-sized foldable trailer proposed by the present utility model;

[0022] Figure 8 The structural schematic diagram of the assembly seat and wheel of a large-sized foldable trailer proposed by the present utility model.

[0023] In the figure: 1, scissor-type telescopic frame; 2, connecting seat; 3, assembly seat; 4, telescopic rod; 5, cross column; 6, spring; 7, pressing block; 8, positioning hole; 9, wheel; 10, U-shaped sleeve; 11, connecting rod; 12, connecting plate; 13, pull rod; 14, mounting seat; 15, movable seat; 16, strip groove; 17, fixed rod; 18, fixed seat. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] As shown by Figures 1-8 , it relates to a large-sized foldable trailer, including four scissor-type telescopic frames 1. The tops of the four scissor-type telescopic frames 1 are all rotatably connected with connecting seats 2, and the bottoms of the four scissor-type telescopic frames 1 are all rotatably connected with assembly seats 3. The tops of the four assembly seats 3 are all fixedly connected with telescopic rods 4. The tops of the telescopic rods 4 are fixedly connected with the bottoms of the connecting seats 2. The telescopic rods 4 perform up and down telescoping when the four scissor-type telescopic frames 1 are telescoping, and at the same time, the four telescopic rods 4 support the four connecting seats 2.

[0026] An assembly groove is provided at the bottom of each of the four assembly seats 3. A spring 6 is fixedly connected to the inner wall of the assembly groove. The four springs 6 elastically support the four pressing blocks 7 respectively. The outer walls of two of the assembly seats 3 are rotatably connected with U-shaped sleeves 10. The inner walls of the two U-shaped sleeves 10 are rotatably connected with connecting rods 11. One end of the two connecting rods 11 is rotatably connected to the same connecting plate 12. Two sliding holes are provided on the outer wall of the connecting plate 12. The inner walls of the two sliding holes are slidably connected with the same pull rod 13. An existing buckle is installed on the outer wall of the connecting plate 12. The buckle fixes the pull rod 13 on the connecting plate 12. When the pull rod 13 rotates, it rotates left and right through the two connecting rods 11 and moves back and forth through the two U-shaped sleeves 10, achieving a multi-angle rotation effect.

[0027] The bottoms of two of the scissor-type telescopic frames 1 are rotatably connected with four mounting seats 14 and two movable seats 15. Two strip-shaped grooves 16 are provided on the outer walls of the mounting seats 14 and the movable seats 15. The bottom of the scissor-type telescopic frame 1 is installed through a plurality of strip-shaped grooves 16. Fixed rods 17 are rotatably connected to the outer walls of the mounting seats 14, the movable seats 15 and the connecting seat 2. One end of the four fixed rods 17 is rotatably connected to the same fixed seat 18. The fixed seat 18 cooperates with the multiple fixed rods 17 to increase the support strength of the bottom of the trailer body.

[0028] A quick-release mechanism is provided at the bottom of the assembly seat 3. The quick-release mechanism includes four pressing blocks 7. A rectangular sliding hole is provided on the outer wall of the assembly seat 3. The inner wall of the rectangular sliding hole is slidably connected with the outer wall of the pressing block 7. One end of the four springs 6 is fixedly connected to the outer wall of the four pressing blocks 7 respectively. A positioning hole 8 is provided on the outer wall of the pressing block 7. A cross-shaped column 5 is slidably connected to the inner wall of the positioning hole 8. A wheel 9 is fixedly connected to the bottom of the cross-shaped column 5. When the cross-shaped column 5 slides into the assembly groove, it squeezes the positioning hole 8 on the pressing block 7. Under the action of the subsequent spring 6, the positioning hole 8 on the pressing block 7 slides into the concave part in the middle of the cross-shaped column 5 to limit it, and does not affect the rotation of the wheel 9.

[0029] Working principle: When in use, four scissor-type telescopic frames 1 form a rectangular structure of the trailer body, and the top is rotatably connected by four connecting seats 2. The bottom of the four scissor-type telescopic frames 1 is supported by four assembly seats 3, four mounting seats 14 and two movable seats 15. Three fixed seats 18 support the bottom of the trailer body through multiple fixed rods 17 and have telescopic ability; the pull rod 13 is telescoped through two sliding holes on the connecting plate 12, and the lock buckle installed on the connecting plate 12 fixes the position of the telescoped pull rod 13. When rotating, the two connecting rods 11 are used to rotate left and right, and the two U-shaped sleeves 10 are used to rotate forward and backward to achieve a multi-angle rotation effect, so as to facilitate the steering and movement of the vehicle body. At the same time, the U-shaped sleeve 10 is used in conjunction with the assembly seat 3 to reduce the number of connecting parts used. When storing, multiple pressing blocks 7 can be pressed inward in sequence to move them. The spring 6 is compressed at this time, and the positioning hole 8 slides out of the middle recessed part of the cross column 5, releasing the position fixation of the cross column 5, and the cross column 5 is slid out of the assembly groove, and the wheel 9 can be taken out for separate storage.

[0030] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A large-sized foldable trailer, comprising four scissor-type telescopic frames (1), characterized in that, A connecting seat (2) is rotatably connected to the top of each of the four scissor-type telescopic frames (1), and a mounting seat (3) is rotatably connected to the bottom of each of the four scissor-type telescopic frames (1). An assembly groove is formed in the bottom of each of the four mounting seats (3), and a spring (6) is fixedly connected to the inner wall of the assembly groove. A quick-release mechanism is provided at the bottom of the mounting seat (3). A U-shaped sleeve (10) is rotatably connected to the outer wall of two of the mounting seats (3), and a connecting rod (11) is rotatably connected to the inner wall of each of the two U-shaped sleeves (10). One end of the two connecting rods (11) is rotatably connected to the same connecting plate (12). Four mounting seats (14) and two movable seats (15) are rotatably connected to the bottom of two of the scissor-type telescopic frames (1). Two strip-shaped grooves (16) are formed in the outer walls of the mounting seat (14) and the movable seat (15).

2. The large-sized foldable trailer according to claim 1, wherein The quick-release mechanism includes four pressing blocks (7). One end of each of the four springs (6) is fixedly connected to the outer wall of each of the four pressing blocks (7). A positioning hole (8) is formed in the outer wall of the pressing block (7), and a cross-shaped column (5) is slidably connected to the inner wall of the positioning hole (8). A wheel (9) is fixedly connected to the bottom of the cross-shaped column (5).

3. A large-sized foldable trailer according to claim 1, characterized in that, A telescopic rod (4) is fixedly connected to the top of each of the four mounting seats (3), and the top of the telescopic rod (4) is fixedly connected to the bottom of the connecting seat (2).

4. A foldable large trailer according to claim 2, characterized in that, A rectangular sliding hole is formed in the outer wall of the mounting seat (3), and the outer wall of the pressing block (7) is slidably connected to the inner wall of the rectangular sliding hole.

5. A foldable large trailer according to claim 1, characterized in that, Two sliding holes are formed in the outer wall of the connecting plate (12), and the same pull rod (13) is slidably connected to the inner walls of the two sliding holes.

6. A large-sized foldable trailer according to claim 1, characterized in that, A fixing rod (17) is rotatably connected to the outer walls of the mounting seat (14), the movable seat (15) and the connecting seat (2). One end of the four fixing rods (17) is rotatably connected to the same fixing seat (18).

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