Telescopic portable trailer frame

Abstract

The utility model relates to the technical field of trailers, and discloses a telescopic portable trailer frame which comprises a first connecting frame, a second connecting frame, an inserting groove formed in the first connecting frame, an inserting rod fixedly installed on the second connecting frame, and adjusting holes formed in the surfaces of the two sides of the first connecting frame and the surfaces of the two sides of the inserting rod. The first connecting frame and the second connecting frame are pulled towards the two sides, so that the first connecting frame and the second connecting frame are unfolded, and then after the first connecting frame and the second connecting frame are unfolded, the first connecting frame and the second connecting frame are limited through an inserting rod in the middle of the second connecting frame; after the first connecting frame and the second connecting frame are unfolded, a worker inserts a positioning bolt into an adjusting hole, so that the first connecting frame and the second connecting frame are fixed through the positioning bolt, the trailer frame can be kept stable during stretching and retracting, and the trailer frame body can stretch and retract through operation; therefore, the size of the trailer frame body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of trailers, in particular to a retractable and convenient trailer frame. Background Art

[0002] A trailer rack is a device specifically designed to transport a trailer. It typically consists of a frame, wheels and tires, connectors, and other necessary components. Trailer racks are available in different types and sizes to accommodate trailers of varying sizes and types. The primary function of a trailer rack is to support the trailer.

[0003] Traditional trailer frames are large in size and do not have the telescopic function. Therefore, when the trailer frame is needed, the area occupied by the trailer frame is large, and the traditional trailer frame is not easy to carry, which reduces its practicality. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present invention provides a retractable and portable trailer frame to solve the problem that the traditional trailer frames mentioned in the above background technology are large in size and do not have the retractable function. Therefore, when the trailer frame is needed, the area occupied by the trailer frame is large, and the traditional trailer frame is not convenient to carry, which leads to a problem of reduced practicality.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a retractable and portable trailer frame, comprising a first connecting frame and a second connecting frame, the first connecting frame having a slot therein, the second connecting frame having an insertion rod fixedly mounted thereon, adjustment holes being provided on both side surfaces of the first connecting frame and the insertion rod, four adjustment holes being provided on both sides of the first connecting frame, the four adjustment holes being arranged in a linear array on the first connecting frame, positioning bolts being inserted in the adjustment holes, movable wheels being provided on both side end surfaces of the second connecting frame, and reinforcement plates being fixedly welded in the first connecting frame and the second connecting frame.

[0006] By adopting the above technical solution, the positioning bolts are removed from the first connecting frame and the second connecting frame, and then the staff pulls the first connecting frame and the second connecting frame toward both sides, so that the first connecting frame and the second connecting frame are stretched. Then, when the first connecting frame and the second connecting frame are stretched, the insertion rod at the middle position of the second connecting frame will limit it. When the first connecting frame and the second connecting frame are stretched, the staff inserts the positioning bolts into the adjustment holes, so that the positioning bolts can fix the first connecting frame and the second connecting frame so that it can remain stable during extension and retraction. In this way, the trailer frame body can be extended and retracted, thereby reducing the volume of the trailer frame body. Then, the moving wheels installed on both sides of the second connecting frame facilitate the movement of the trailer frame body when towing the vehicle. Then, reinforcing plates are provided in the first connecting frame and the second connecting frame, so that the strength of the trailer frame body can be better improved.

[0007] Preferably, a mounting frame is fixedly installed at a position closer to the front end of the bottom of the first connecting frame, a traction frame is rotatably installed in the mounting frame, and a positioning hole is provided on the front end surface of the traction frame.

[0008] By adopting the above technical solution, the traction frame rotatably installed in the mounting frame is connected to the tractor, so that the tractor can drive the vehicle on the trailer frame body to move, and the positioning hole provided on the spring traction frame can limit the traction frame when it is folded.

[0009] Preferably, connecting plates are arranged opposite to each other at the bottom of the second connecting frame closer to the rear end, connecting rods are passed through the connecting plates, and fixing plates are fixedly installed on the outer end surfaces of the connecting rods.

[0010] By adopting the above technical solution, the connecting rod inserted in the connecting plate can easily drive the positioning rod to move, and then the fixing plate provided at the outer end of the connecting rod makes it easy for the staff to pull the connecting rod.

[0011] Preferably, a limiting plate is fixedly mounted on the inner end surface of the connecting rod, a spring is fixedly mounted on the inner end surface of the limiting plate, the other end of the spring is connected to the connecting plate, and a positioning rod is fixedly mounted on the inner end surface of the limiting plate.

[0012] By adopting the above technical solution, the spring can be restricted by the limit plate, and then the spring can easily drive the positioning rod to reset, so that the positioning rod is inserted into the positioning hole opened on the traction frame to restrict the traction frame.

[0013] Preferably, the first connecting frame, the second connecting frame, the traction frame and the reinforcing plate are all made of hot-dip galvanized steel.

[0014] By adopting the above technical solution, the first connecting frame, the second connecting frame, the trailer frame and the reinforcement plate are all made of hot-dip galvanized steel, so this can better improve the corrosion resistance of the trailer frame body, making it suitable for outdoor environments, while also improving a certain degree of durability.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The retractable and portable trailer frame extends between the first and second connecting frames by pulling the first and second connecting frames toward both sides. Then, when the first and second connecting frames are extended, the insertion rod at the middle position of the second connecting frame will limit them. After the first and second connecting frames are extended, the staff inserts the positioning bolts into the adjustment holes, so that the positioning bolts can fix the first and second connecting frames so that they can remain stable during extension and retraction. In this way, the trailer frame body can be extended and retracted, thereby reducing the volume of the trailer frame body.

[0017] 2. The retractable and convenient trailer frame is constructed by pulling the fixing plates to both sides, thereby contracting the spring and moving the positioning rod outward. The staff then rotates the traction frame so that the traction frame body contacts the surfaces of the first connecting frame and the second connecting frame body. The staff then releases and pulls the fixing plates, thereby causing the spring to rebound, thereby causing the limit plate to drive the positioning rod to reset, so that the positioning rod is inserted into the positioning hole provided on the traction frame. Thus, the traction frame is folded up, thereby reducing the volume of the trailer frame body, so that it is easy to carry when towing work is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the retractable and convenient trailer frame of the utility model;

[0019] Figure 2 This is a side structural diagram of the retractable and convenient trailer frame of the utility model;

[0020] Figure 3 This is a schematic diagram of the retractable structure of the utility model's retractable and convenient trailer frame;

[0021] Figure 4 This is a schematic diagram of the side structure of the retractable and portable trailer frame of the utility model after being retracted;

[0022] Figure 5 This is a schematic diagram of the disassembled structure of the retractable and convenient trailer frame of the utility model;

[0023] Figure 6 For this utility model Figure 4 A magnified schematic diagram of the structure in the middle.

[0024] In the figure: 1. First connecting frame; 2. Second connecting frame; 3. Slot; 4. Insert rod; 5. Adjustment hole; 6. Positioning bolt; 7. Moving wheel; 8. Reinforcement plate; 9. Mounting frame; 10. Traction frame; 11. Positioning hole; 12. Connecting plate; 13. Connecting rod; 14. Fixing plate; 15. Limiting plate; 16. Spring; 17. Positioning rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1:

[0027] Please refer to Figures 1-6, which show a retractable and portable trailer frame. A slot 3 is provided in the first connecting frame 1, and an insertion rod 4 is fixedly installed on the second connecting frame 2. Adjustment holes 5 are provided on both side surfaces of the first connecting frame 1 and the insertion rod 4. There are four adjustment holes 5 on both sides of the first connecting frame 1, and the four adjustment holes 5 are arranged in a linear array on the first connecting frame 1. Positioning bolts 6 are inserted in the adjustment holes 5. Moving wheels 7 are provided on both side end surfaces of the second connecting frame 2. Reinforcement plates 8 are fixedly welded in the first connecting frame 1 and the second connecting frame 2. The first connecting frame 1, the second connecting frame 2, the traction frame 10 and the reinforcement plate 8 are all made of hot-dip galvanized steel.

[0028] Working principle: When the trailer frame needs to be unfolded, the staff can remove the positioning bolts 6 from the first connecting frame 1 and the second connecting frame 2, and then pull the first connecting frame 1 and the second connecting frame 2 to both sides, so that the first connecting frame 1 and the second connecting frame 2 are stretched. Then, when the first connecting frame 1 and the second connecting frame 2 are stretched, the insertion rod 4 in the middle position of the second connecting frame 2 will limit it. After the first connecting frame 1 and the second connecting frame 2 are stretched, the staff inserts the positioning bolts 6 into the adjustment holes 5, so that the positioning bolts 6 can fix the first connecting frame 1 and the second connecting frame 2. It is convenient to keep it stable during extension and retraction, so that the trailer frame body can be extended and retracted by this operation, thereby reducing the volume of the trailer frame body. Then, the moving wheels 7 installed on both sides of the second connecting frame 2 facilitate the movement of the trailer frame body when towing the vehicle. Then, the first connecting frame 1 and the second connecting frame 2 are provided with a reinforcing plate 8, so this can better improve the strength of the trailer frame body. Then, the first connecting frame 1, the second connecting frame 2, the trailer frame and the reinforcing plate 8 are all made of hot-dip galvanized steel, so this can better improve the corrosion resistance of the trailer frame body, making it suitable for outdoor environments, while also improving a certain degree of durability.

[0029] Example 2:

[0030] Please refer to Figures 1-6, which shows a retractable and portable trailer frame. A mounting frame 9 is fixedly installed at the bottom of the first connecting frame 1, closer to the front end. A traction frame 10 is rotatably installed in the mounting frame 9. A positioning hole 11 is provided on the front end surface of the traction frame 10. A connecting plate 12 is oppositely arranged at the bottom of the second connecting frame 2, closer to the rear end. A connecting rod 13 passes through the connecting plate 12. A fixing plate 14 is fixedly installed on the outer end surface of the connecting rod 13. A limiting plate 15 is fixedly installed on the inner end surface of the connecting rod 13. A spring 16 is fixedly installed on the inner end surface of the limiting plate 15. The other end of the spring 16 is connected to the connecting plate 12, and a positioning rod 17 is fixedly installed on the inner end surface of the limiting plate 15.

[0031] Working principle: The traction frame 10 installed by rotation in the mounting frame 9 can be connected to the tractor, so that the tractor drives the vehicle on the trailer frame body to move. The staff first retracts the trailer frame body, and then flips the trailer frame body so that the bottom of the trailer frame body faces upward. The staff then pulls the fixing plates 14 to both sides, thereby causing the springs 16 to contract and the positioning rods 17 to move outward. The staff then rotates the traction frame 10 so that the traction frame 10 body contacts the surfaces of the first connecting frame 1 and the second connecting frame 2 body. The staff then releases and pulls the fixing plates 14, thereby causing the springs 16 to rebound, thereby causing the limit plates 15 to drive the positioning rods 17 to reset, thereby causing the positioning rods 17 to be inserted into the positioning holes 11 provided on the traction frame 10. As a result, the traction frame 10 is folded, thereby reducing the volume of the trailer frame body, making it easier to carry when towing is required.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A retractable and portable trailer frame, comprising a first connecting frame (1) and a second connecting frame (2), characterized in that: A slot (3) is provided in the first connecting frame (1), an insertion rod (4) is fixedly installed on the second connecting frame (2), adjustment holes (5) are provided on both side surfaces of the first connecting frame (1) and the insertion rod (4), four adjustment holes (5) are provided on both sides of the first connecting frame (1), and the four adjustment holes (5) are arranged in a linear array on the first connecting frame (1), positioning bolts (6) are inserted in the adjustment holes (5), moving wheels (7) are provided on both side end surfaces of the second connecting frame (2), and reinforcement plates (8) are fixedly welded in the first connecting frame (1) and the second connecting frame (2).

2. The retractable portable trailer frame according to claim 1, characterized in that: A mounting frame (9) is fixedly installed at a position closer to the front end of the bottom of the first connecting frame (1), a traction frame (10) is rotatably installed in the mounting frame (9), and a positioning hole (11) is provided on the front end surface of the traction frame (10).

3. The retractable portable trailer frame according to claim 1, characterized in that: A connecting plate (12) is provided at a position on the bottom of the second connecting frame (2) closer to the rear end. A connecting rod (13) passes through the connecting plate (12). A fixing plate (14) is fixedly mounted on the outer end surface of the connecting rod (13).

4. The retractable portable trailer frame according to claim 3, characterized in that: A limiting plate (15) is fixedly mounted on the inner end surface of the connecting rod (13), a spring (16) is fixedly mounted on the inner end surface of the limiting plate (15), the other end of the spring (16) is connected to the connecting plate (12), and a positioning rod (17) is fixedly mounted on the inner end surface of the limiting plate (15).

5. The retractable portable trailer frame according to claim 1, characterized in that: The first connecting frame (1), the second connecting frame (2), the traction frame (10) and the reinforcing plate (8) are all made of hot-dip galvanized steel.

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