A detachable connecting arm structure for a car trailer

Abstract

The utility model relates to trailer arm technical field, and specifically is a kind of detachable connecting arm structure for car trailer, including trailer base, the trailer base top is provided with fixed component, the fixed component includes the protection cover fixed by bolt in the trailer base top, the protection cover top is equipped with gantry rod, the bottom end of the gantry rod in the protection cover inside is fixed with layer board by bolt, the layer board bottom is equidistantly provided with clamping column, the outside of the gantry rod in the layer board top is equipped with compression spring;The trailer base one end is equipped with trailer arm, the trailer arm both sides are welded with first structure block, the first structure block outside is equipped with connecting plate, the trailer arm top is penetrated and is equipped with slot, the slot inside is equipped with stand column;Trailer arm is inserted in trailer base one end, is fixed by fixed component and connecting plate, trailer ball is fixed on trailer arm by stand column and slot, fixed firm, installation, dismounting is convenient.

Description

Technical Field

[0001] This utility model relates to the field of trailer arm technology, specifically to a detachable connecting arm structure for automobile trailers. Background Technology

[0002] A "trailer arm," also known as a trailer boom, is a device or component used to tow trailers. Located behind a car or truck, the trailer arm connects to the vehicle's hook or trailer hitch, enabling the vehicle to safely tow the trailer. The design and material selection of the trailer arm are related to the type and weight of the trailer to ensure stability and safety during towing.

[0003] Existing detachable trailer arms are fixed by a shaft after being inserted into the base. This can easily cause the shaft to bend during towing. Therefore, a detachable connecting arm structure for car trailers is proposed. A compression spring pushes the shelf down, allowing the locking pin to be inserted into the locking hole. Rotating the connecting plate will allow it to be fitted onto the outside of the second structural block through a pre-reserved slot, thus fixing the trailer arm inserted into the trailer base. This design is secure and easy to disassemble. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a detachable connecting arm structure for car trailers. By compressing a spring to push the shelf down, the locking pin is inserted into the locking hole. Rotating the connecting plate will allow it to be fitted onto the outside of the second structural block through the reserved slot, thus fixing the trailer arm inserted into the trailer base. The fixation is firm and easy to disassemble.

[0005] The technical solution adopted by this utility model to solve its technical problem is a detachable connecting arm structure for a car trailer, including a trailer base. A fixing component is provided on the top of the trailer base. The fixing component includes a protective cover fixed to the top of the trailer base by bolts. A gantry rod is sleeved on the top of the protective cover. A shelf is fixed to the bottom of the gantry rod inside the protective cover by bolts. A locking post is equidistantly arranged on the bottom of the shelf. A compression spring is sleeved on the outer side of the top of the gantry rod.

[0006] The trailer base is fitted with a trailer arm at one end, and first structural blocks are welded to both sides of the trailer arm. A connecting plate is fitted on the outside of the first structural blocks. A slot is opened through the top of the trailer arm, and a column is fitted inside the slot. A limit plate is welded to the top of the column, and a trailer ball is welded to the top of the limit plate.

[0007] By adopting the above technical solution, after the trailer arm is inserted into the trailer base, the compression spring pushes the shelf down, and the trailer arm is fixed by multiple locking pins. The trailer arm can also be fixed by rotating the connecting plate so that one end is connected to the trailer base. The installation and disassembly are convenient and the fixation is firm.

[0008] Specifically, a side plate is welded to the end of the trailer base away from the trailer arm, and second structural blocks are welded to both ends of the trailer base. A reserved groove corresponding to the second structural block is opened at one end of the bottom of the connecting plate.

[0009] Specifically, the top of the trailer arm is provided with locking holes at equal intervals corresponding to the locking posts.

[0010] Specifically, the slot has equidistant grooves on its inner side, and the column has equidistant strips welded on its outer side, with the strips located inside the grooves.

[0011] Specifically, the column has a threaded groove on the outer side of the bottom of the card strip, and a fixing nut is fitted on the outer side of the column through the threaded groove.

[0012] The beneficial effects of this utility model are:

[0013] (1) The detachable connecting arm structure for a car trailer described in this utility model allows the trailer arm to be inserted into the trailer base by pulling up the gantry rod to allow the shelf to enter the protective cover. After releasing the gantry rod, the compression spring pushes the shelf down, allowing multiple locking pins at the bottom of the shelf to be inserted into the corresponding locking holes, thus fixing the trailer arm inserted into the trailer base. Rotating the connecting plate through the reserved slot allows it to fit over the outside of the second structural block, similarly fixing the trailer arm inserted into the trailer base. The fixing is secure.

[0014] (2) The detachable connecting arm structure for a car trailer described in this utility model inserts the column into the slot until the limiting plate moves onto the trailer arm. The fixing nut is screwed onto the outside of the bottom of the trailer arm through the threaded groove to fix the column inserted into the slot. When the column is inserted into the slot, multiple clips are inserted into the corresponding slots to prevent the column from rotating in the slot. The plug-in design makes disassembly convenient. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the trailer base structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the fixing component structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the trailer arm structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the column structure of this utility model;

[0021] In the diagram: 1. Trailer base; 2. Trailer arm; 3. Trailer ball; 4. Fixing assembly; 401. Protective cover; 402. Gantry rod; 403. Shelf; 404. Locking post; 405. Compression spring; 5. Connecting plate; 6. Slot; 7. First structural block; 8. Reserved slot; 9. Second structural block; 10. Side plate; 11. Locking hole; 12. Locking groove; 13. Column; 14. Limiting plate; 15. Locking strip; 16. Threaded groove; 17. Fixing nut. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] A compression spring pushes the shelf down, causing the locking pin to insert into the locking hole. Rotating the connecting plate will then allow it to fit over the outside of the second structural block through a pre-drilled slot, securing the trailer arm inserted into the trailer base. This secure fixation is both firm and easy to disassemble. Figures 1-5 As shown, the present invention discloses a detachable connecting arm structure for a car trailer, including a trailer base 1. A fixing component 4 is provided on the top of the trailer base 1. The fixing component 4 includes a protective cover 401 fixed to the top of the trailer base 1 by bolts. A gantry rod 402 is sleeved on the top of the protective cover 401. A shelf 403 is fixed to the bottom of the gantry rod 402 inside the protective cover 401 by bolts. A locking post 404 is equidistantly arranged at the bottom of the shelf 403. A compression spring 405 is sleeved on the outer side of the top of the gantry rod 402.

[0024] The trailer base 1 is fitted with a trailer arm 2 at one end. The trailer arm 2 is welded with first structural blocks 7 on both sides. The first structural blocks 7 are fitted with connecting plates 5 on the outside. The top of the trailer arm 2 is provided with a slot 6. The slot 6 is fitted with a column 13. The top of the column 13 is welded with a limiting plate 14. The top of the limiting plate 14 is welded with a trailer ball 3.

[0025] When in use, after the trailer arm 2 is inserted into the trailer base 1, the compression spring 405 pushes the shelf 403 down and fixes the trailer arm 2 by multiple locking pins 404. Rotating the connecting plate 5 so that one end is connected to the trailer base 1 can also fix the trailer arm 2. It is easy to install and disassemble and is firmly fixed.

[0026] For example, such as Figure 2 , Figure 4 As shown, the present invention also includes a side plate 10 welded to one end of the trailer base 1 away from the trailer arm 2, a second structural block 9 welded to both ends of the trailer base 1, and a reserved groove 8 corresponding to the second structural block 9 opened at one bottom end of the connecting plate 5.

[0027] In use, the connecting plate 5 is fitted onto the outside of the second structural block 9 through the reserved groove 8 to reinforce the trailer arm 2 that is fitted onto one end of the trailer base 1.

[0028] For example, such as Figure 4 As shown, the present invention also includes, at equal intervals, card holes 11 corresponding to the card posts 404 on the top of the trailer arm 2.

[0029] When in use, the opening of the card hole 11 facilitates the insertion of the card post 404.

[0030] For example, such as Figure 4 , Figure 5 As shown, the present invention also includes slots 12 equidistantly provided on the inner side of the slot 6, and strips 15 equidistantly welded on the outer side of the column 13, the strips 15 being located inside the slots 12.

[0031] When in use, when the column 13 is inserted into the slot 6, the locking strip 15 is inserted into the corresponding slot 12 to prevent the column 13 from rotating in the slot 6.

[0032] For example, such as Figure 5 As shown, the present invention also includes a threaded groove 16 on the outer side of the bottom of the card strip 15 of the column 13, and a fixing nut 17 is sleeved on the outer side of the column 13 through the threaded groove 16.

[0033] When in use, the fixing nut 17 is screwed onto the outside of the column 13 through the threaded groove 16 to fix the column 13 inserted into the slot 6.

[0034] When using this utility model, personnel use bolts to fix the trailer base 1 to the back of the car through the side plate 10, and pull up the gantry rod 402 to make the shelf 403 enter the protective cover 401, and then the trailer arm 2 can be inserted into the trailer base 1.

[0035] After the gantry rod 402 is released, the compression spring 405 pushes the shelf 403 downward, causing multiple locking pins 404 at the bottom of the shelf 403 to insert into the corresponding locking holes 11, thus fixing the trailer arm 2 inserted into the trailer base 1. The connecting plate 5 is rotated through the reserved slot 8 to fit onto the outside of the second structural block 9, similarly fixing the trailer arm 2 inserted into the trailer base 1.

[0036] Insert the column 13 into the slot 6 until the limiting plate 14 moves onto the trailer arm 2. Tighten the fixing nut 17 onto the outside of the column 13 located at the bottom of the trailer arm 2 through the threaded groove 16 to fix the column 13 inserted into the slot 6. When the column 13 is inserted into the slot 6, multiple locking strips 15 are inserted into the corresponding locking slots 12 to prevent the column 13 from rotating in the slot 6.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A detachable connecting arm structure for a car trailer, characterized in that, The system includes a trailer base (1), a fixing assembly (4) is provided on the top of the trailer base (1), the fixing assembly (4) includes a protective cover (401) fixed to the top of the trailer base (1) by bolts, a gantry rod (402) is sleeved on the top of the protective cover (401), a shelf (403) is fixed to the bottom of the gantry rod (402) inside the protective cover (401) by bolts, a locking post (404) is provided at equal intervals at the bottom of the shelf (403), and a compression spring (405) is sleeved on the outer side of the top of the gantry rod (402) at the top of the shelf (403); The trailer base (1) is fitted with a trailer arm (2) at one end. The trailer arm (2) is welded with a first structural block (7) on both sides. A connecting plate (5) is fitted on the outside of the first structural block (7). A slot (6) is opened through the top of the trailer arm (2). A column (13) is fitted inside the slot (6). A limit plate (14) is welded to the top of the column (13). A trailer ball (3) is welded to the top of the limit plate (14).

2. The detachable connecting arm structure for a car trailer according to claim 1, characterized in that, The trailer base (1) has a side plate (10) welded to one end away from the trailer arm (2), and the trailer base (1) has a second structural block (9) welded to both ends. The bottom end of the connecting plate (5) has a reserved groove (8) corresponding to the second structural block (9).

3. The detachable connecting arm structure for a car trailer according to claim 1, characterized in that, The top of the trailer arm (2) is provided with equidistant locking holes (11) corresponding to the locking posts (404).

4. The detachable connecting arm structure for a car trailer according to claim 1, characterized in that, The slot (6) has card slots (12) equidistantly opened on the inner side, and the column (13) has card strips (15) equidistantly welded on the outer side, and the card strips (15) are located inside the card slots (12).

5. The detachable connecting arm structure for a car trailer according to claim 1, characterized in that, The column (13) has a threaded groove (16) on the outside of the bottom of the clip (15), and a fixing nut (17) is fitted on the outside of the column (13) through the threaded groove (16).

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