Front wheel quick-release trailer

Abstract

The utility model relates to the field of manual trailers, and particularly discloses a front wheel quick-release trailer which comprises a front frame and a rear frame, two mounting pipes are fixed on one side of the front frame, a guide cover is fixed on the top of each mounting pipe, a lantern ring sliding back and forth in the guide cover is arranged on each guide cover, and an extrusion plate penetrating through the guide covers is fixed on one side of each lantern ring. The other side of the lantern ring is sleeved with a spring fixed in the guide cover, a guide column sliding up and down in the mounting pipe is arranged in the mounting pipe, a clamping column and a positioning column are sequentially fixed to the guide column from bottom to top, a front wheel frame is fixed to the bottom of the guide column, and a front wheel is connected to the front wheel frame; complex assembling steps are not needed, installation of the front wheel can be achieved only by inserting the guide column into the installation pipe and locking the clamping column and the lantern ring, the installation difficulty of the front wheel is greatly reduced, the disassembly and assembly efficiency of the front wheel is improved, consumed time in the packaging process is shortened, and occupied space during transportation and storage is also saved.

Description

Technical Field

[0001] This utility model relates to the field of manual trailers, and in particular to a front wheel quick-release trailer. Background Technology

[0002] Trailers are human-powered transport vehicles that are pushed and pulled. Although trailer material handling technology has been continuously developing, trailers are still used as an indispensable transport tool. They are widely used in production and daily life because they are inexpensive, easy to maintain, convenient to operate, and lightweight. They can work in places where motor vehicles are inconvenient to use and are very convenient for transporting lighter items over short distances.

[0003] To reduce the space occupied by trailers when stored, foldable trailers have been developed. However, even when folded, trailers still take up extra storage space due to their large wheels. Existing trailer wheels are installed on the frame using bolts or other structures, which are not convenient to disassemble and install.

[0004] The technical problem to be solved by this application is to provide a trailer wheel mounting structure that can be quickly disassembled and assembled. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a quick-release trailer with a stable front wheel structure.

[0006] The technical solution adopted by this utility model is as follows: a front wheel quick-release trailer, including a front frame and a rear frame. Two mounting tubes are fixed on one side of the front frame. A guide cover is fixed on the top of the mounting tube. The guide cover has a collar that slides back and forth inside it. A compression plate that penetrates the guide cover is fixed on one side of the collar. A spring that is fixed inside the guide cover is sleeved on the other side of the collar. A guide post that slides up and down inside the mounting tube is provided. A locking post and a positioning post are fixed on the guide post from bottom to top. The outer diameter of the positioning post and the guide post is the same as the inner diameter of the collar, and the outer diameter of the locking post is smaller than the inner diameter of the collar. A front wheel frame is fixed at the bottom of the guide post. The front wheel frame is connected to the front wheel.

[0007] When the front wheel needs to be removed, simply press the squeeze plate inward to move the collar and separate it from the retaining post. Then, drag the front wheel bracket downward to remove the front wheel. When the front wheel needs to be installed, insert the guide post into the mounting tube, use the arc-shaped part at the top of the positioning post to push the collar and compress the spring, and then continue to push the guide post upward until the retaining post is fitted inside the collar. The spring expands and the collar is locked outside the retaining post, thus completing the installation of the front wheel.

[0008] In some embodiments, the top of the positioning post is arc-shaped, and when the spring is in the expanded state, it pushes the collar to fit over the locking post, with the upper and lower ends of the collar contacting the positioning post and the guide post, respectively.

[0009] In some embodiments, the guide cover has a pin hole for limiting the movement of the compression plate.

[0010] In some embodiments, the bottom of the guide post is provided with a connecting member that rotates with it, and the outer diameter of the connecting member is the same as the inner diameter of the mounting tube.

[0011] In some implementations, the rear frame is fitted with two disassembly tubes, the bottom of which is fixed to a rear wheel frame, which is connected to a rear wheel.

[0012] In some embodiments, a pressing member is provided on the outside of the disassembly tube, which elastically engages with it, and a compression spring is fixed on one side of the pressing member and located inside the disassembly tube.

[0013] In some implementations, the rear frame has positioning holes that are the same shape and size as the pressing element.

[0014] In some embodiments, the front frame and the rear frame are each provided with a chassis frame rotatably connected thereto, and a folding member is provided between the two chassis frames.

[0015] In some implementations, multiple side folding bars arranged in an X-shape are also provided between the front frame and the rear frame.

[0016] The beneficial effects of this utility model are as follows: through the cooperation of the collar, spring and locking post, the front wheel can be removed simply by pressing the compression plate. At the same time, there is no need for complicated assembly steps. Just insert the guide post into the installation tube and wait for the locking post and collar to lock together to install the front wheel. This greatly reduces the difficulty of installing the front wheel, improves the efficiency of front wheel disassembly and assembly, speeds up the time spent in the packaging process, and saves the space occupied during transportation and storage. Attached Figure Description

[0017] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0019] Figure 3 For the present utility model Figure 1 A magnified view of the structure at point A in the middle;

[0020] Figure 4 This is an exploded view of the front wheel assembly / disassembly structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the mounting tube in the front wheel assembly / disassembly structure of this utility model;

[0022] Figure 6 For the present utility model Figure 2A magnified schematic diagram of the structure at point B in the middle;

[0023] Figure 7 This is an exploded view of the rear wheel assembly / disassembly structure of this utility model.

[0024] Figure 8 This is a schematic diagram of the structure of this utility model after being folded and stored.

[0025] Figure 9 This is a schematic diagram of the structure of the present invention where the front and rear wheels can be removed after folding and storing.

[0026] In the diagram: 1. Front frame; 2. Rear frame; 3. Side folding bar; 4. Underframe; 5. Folding piece; 6. Front wheel; 7. Rear wheel; 8. Mounting tube; 9. Guide cover; 10. Extrusion plate; 11. Front wheel frame; 12. Spring; 13. Positioning pin; 14. Pin hole; 15. Collar; 16. Locking pin; 17. Guide pin; 18. Connecting piece; 19. Pressing piece; 20. Rear wheel frame; 21. Positioning hole; 22. Disassembly tube. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1 and Figure 2 , Figure 8 and Figure 9 This utility model provides a technical solution: a front wheel quick-release trailer, including a front frame 1 and a rear frame 2. Multiple X-shaped and intersecting side folding rods 3 are provided between the front frame 1 and the rear frame 2. The side folding rods 3 are connected by pins for folding and storage. Each of the front frame 1 and the rear frame 2 is provided with a chassis 4 that is rotatably connected to it. The two chassis 4 are connected by a folding piece 5. Under the action of the folding piece 5, the two chassis 4 are folded upward along their connection center and stored in an inverted V shape when stored.

[0029] Please see Figure 1 , Figures 3 to 5Two mounting tubes 8 are fixed to the bottom of the front frame 1. A guide cover 9 is fixed to the top of the mounting tubes 8. A collar 15 is slidably connected to the guide cover 9. A spring 12 is installed on one side of the collar 15 and fixed inside the guide cover 9. A pressing plate 10 is fixed to the other side of the collar 15. The guide cover 9 has a pin hole 14 for limiting the movement of the pressing plate 10. A front wheel frame 11 is installed on the top of the front wheel 6. A connector 18 is fixed to the top of the front wheel frame 11. A guide post 17 is rotatably connected to the connector 18. A locking post 16 and a positioning post 13 are fixed to the top of the guide post 17 in sequence. The guide post 17... The outer diameter of the positioning post 13 is the same as the inner diameter of the collar 15. The outer diameter of the locking post 16 is smaller than the inner diameter of the collar 15. The top of the positioning post 13 is arc-shaped. When the positioning post 13 moves upward, it can push the collar 15 to move, so that the locking post 16 can be locked on the outside of the collar 15. Under the elastic action of the spring 12, the collar 15 will not come off, thus realizing the installation of the front wheel 6. To remove the front wheel 6, simply press the squeezing plate 10 to make the center of the collar 15 and the center of the locking post 16 coincide, so that the locking post 16 can be separated from the collar 15. Then, drag the guide post 17 downward to remove the front wheel 6.

[0030] Please see Figure 2 , Figure 6 and Figure 7 Two disassembly tubes 22 are inserted at the bottom of the rear frame 2. The disassembly tubes 22 are hollow metal tubes with U-shaped retaining springs inside. One end of the retaining springs is fixed with a pressing member 19. The rear frame 2 has a positioning hole 21 with the same shape and size as the pressing member 19. When it is necessary to disassemble the rear wheel 7, simply press the pressing member 19 to separate the pressing member 19 from the positioning hole 21 and then drag the rear wheel frame 20 downward.

[0031] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A front wheel quick-release trailer, comprising a front frame (1) and a rear frame (2), characterized in that, Two mounting tubes (8) are fixed on one side of the front frame (1). A guide cover (9) is fixed on the top of the mounting tube (8). The guide cover (9) is provided with a collar (15) that slides back and forth inside it. A pressing plate (10) that penetrates the guide cover (9) is fixed on one side of the collar (15). A spring (12) fixed inside the guide cover (9) is sleeved on the other side of the collar (15). A guide post (17) that slides up and down inside the mounting tube (8) is provided inside it. A locking post (16) and a positioning post (13) are fixed on the guide post (17) from bottom to top. The outer diameter of the positioning post (13) and the guide post (17) is the same as the inner diameter of the collar (15), and the outer diameter of the locking post (16) is smaller than the inner diameter of the collar (15). A front wheel frame (11) is fixed at the bottom of the guide post (17). The front wheel frame (11) is connected to the front wheel (6).

2. A front wheel quick-release trailer according to claim 1, characterized in that, The top of the positioning post (13) is arc-shaped. When the spring (12) is in an expanded state, it pushes the collar (15) to be sleeved on the outside of the locking post (16), and the upper and lower ends of the collar (15) are in contact with the positioning post (13) and the guide post (17) respectively.

3. A front wheel quick-release trailer according to claim 1, characterized in that, The guide cover (9) has a pin hole (14) for limiting the movement of the compression plate (10).

4. A front wheel quick-release trailer according to claim 1, characterized in that, The bottom of the guide post (17) is provided with a connecting piece (18) that rotates with it, and the outer diameter of the connecting piece (18) is the same as the inner diameter of the mounting tube (8).

5. A front wheel quick-release trailer according to claim 1, characterized in that, The rear frame (2) is fitted with two disassembly tubes (22), and the bottom of the disassembly tubes (22) is fixed with a rear wheel frame (20), and the rear wheel frame (20) is connected to a rear wheel (7).

6. A front wheel quick-release trailer according to claim 5, characterized in that, The outer side of the disassembly tube (22) is provided with a pressing member (19) that elastically cooperates with it, and a compression spring is fixed on one side of the pressing member (19) inside the disassembly tube (22).

7. A front wheel quick-release trailer according to claim 6, characterized in that, The rear frame (2) has a positioning hole (21) that is the same in shape and size as the pressing part (19).

8. A front wheel quick-release trailer according to claim 1, characterized in that, The front frame (1) and the rear frame (2) are each provided with a chassis (4) rotatably connected thereto, and a folding piece (5) is provided between the two chassis (4).

9. A front wheel quick-release trailer according to claim 1, characterized in that, Multiple side folding bars (3) arranged in an X-shape are also provided between the front frame (1) and the rear frame (2).

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