Connecting device for square opening of trailer lever

Abstract

According to the technical scheme, the connecting device is characterized by comprising a connecting block, the connecting block is inserted into a square pipe, the two opposite side faces of the connecting block are arranged to be two connecting faces, a connecting hole penetrating through the connecting block in the direction perpendicular to the connecting faces is formed in the connecting block, and the connecting block is connected with the connecting hole. Through holes which can be aligned with the connecting holes are formed in the two side walls, corresponding to the two connecting surfaces, of the square tube and the two side walls, corresponding to the two connecting surfaces, of the square opening; the connecting bolt comprises a screw rod and a head part, the screw rod at least penetrates through the square opening and the through hole in the single side of the square tube and is in threaded fit with the connecting hole, and the head part of the connecting bolt can abut against the outside of the square opening; through the effect of the connecting bolt, one side of the square opening and one side of the square pipe can be pressed together through the connecting block and the head of the bolt, so that the square opening and the square pipe cannot collide with each other due to bumping of an automobile, noise is reduced, and the service life of the square opening and the service life of the square pipe are prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of trailer connection, and more specifically, it relates to a connection device for the square opening of a trailer boom. Background Technology

[0002] A trailer bumper is installed at the rear of a vehicle and serves as a connector for towing trailers, yachts, RVs, etc. A trailer bumper adapter is part of the trailer bumper; it connects the entire trailer bumper to the towing connector, which in turn connects to the item to be towed.

[0003] In the existing technology, the connection port of the trailer bar is mostly set as a square opening, and the corresponding connecting part of the trailer connector connected to the square opening is set as a square tube. When connecting, the square tube is inserted into the square opening, and then the connection between the square opening and the square tube is achieved by a pin that passes through the square opening and the square tube.

[0004] However, in the existing technology, in order to make it easier for the square tube to be inserted into the square opening, there needs to be an assembly gap between the four sides of the square tube and the four inner walls of the square opening. This also makes it easy for the square tube and the square opening to generate noise and wear due to mutual collision when the car is driving on a bumpy road during normal towing operations. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a connecting device for the square opening of a trailer bumper. Through the action of connecting bolts, the square opening and one side of the square tube can be pressed together by the connecting block and the head of the bolt, so that the square opening and the square tube will not collide due to the bumps of the car, thereby reducing noise and extending the service life of the square opening and the square tube.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a connecting device for a square opening of a trailer bar, used to connect the square opening of the trailer bar to the square tube of a trailer hitch connector, including a connecting block, the connecting block being inserted into the square tube, the two opposite sides of the connecting block being configured as two connecting surfaces, the connecting block being provided with a connecting hole penetrating the connecting block in a direction perpendicular to the connecting surface, and the two side walls of the square tube corresponding to the two connecting surfaces and the two side walls of the square opening corresponding to the two connecting surfaces being provided with through holes that can be aligned with the connecting holes;

[0007] The connecting bolt includes a screw and a head. The screw passes through at least one through hole on one side of the square opening and the square tube and is threaded into the connecting hole. The head of the connecting bolt can be pressed against the outside of the square opening.

[0008] The present invention is further configured such that: the screw includes a threaded part and a smooth part, the threaded part is threadedly engaged with the connecting hole, and the smooth part passes through the side wall of the connecting block, the square tube and the square opening and extends out of the square opening.

[0009] The present invention is further configured such that: the screw also includes a limiting part, which is disposed at the end of the smooth rod portion away from the threaded portion;

[0010] The limiting part is detachably connected with a locking pin.

[0011] The present invention is further configured such that: the limiting part is provided with an annular groove surrounding the limiting part, and the locking pin is engaged in the groove.

[0012] The present invention is further configured such that: a washer is provided on the outer sleeve of the screw, and the washer is disposed between the head of the bolt and the square opening.

[0013] The present invention is further configured such that the gasket includes at least a flat gasket and a spring gasket.

[0014] The present invention is further provided with chamfers on the sides of both ends of the connecting hole to facilitate the insertion of the screw.

[0015] In summary, the present invention has the following advantages over the prior art: the present invention, through the action of the connecting bolt, can press one side of the square opening and the square tube together by the connecting block and the head of the bolt, so that the square opening and the square tube will not collide due to the bumps of the car, thereby reducing noise and extending the service life of the square opening and the square tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0017] Figure 2 for Figure 1 Enlarged schematic diagram of part A;

[0018] Figure 3 This is a cross-sectional view of the overall structure of the embodiment;

[0019] Figure 4 for Figure 3 Enlarged schematic diagram of part B.

[0020] In the diagram: 1. Square opening; 2. Square tube; 3. Connecting block; 31. Connecting hole; 4. Bolt; 41. Head; 42. Threaded part; 43. Smooth rod part; 44. Limiting part; 441. Slot; 5. Locking pin; 6. Gasket. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0022] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0023] Example: A connecting device for the square opening 1 of a trailer bumper, see attached document. Figure 1 - Appendix Figure 4 This device is used to connect the square opening 1 of the trailer bumper to the square tube 2 of the trailer hitch connector. The connecting device includes a connecting block 3 and a connecting bolt 4. The connecting block 3 is inserted into the square tube 2. The two opposite sides of the connecting block 3 are set as two connecting surfaces. The connecting block 3 is provided with a connecting hole 31 that penetrates the connecting block 3 in a direction perpendicular to the connecting surface. The two side walls of the square tube 2 corresponding to the two connecting surfaces and the two side walls of the square opening 1 corresponding to the two connecting surfaces are provided with through holes that can be aligned with the connecting hole 31. The connecting bolt 4 includes a screw and a head 41. The screw passes through at least one through hole of the square opening 1 and one side of the square tube 2 and is threaded into the connecting hole 31. The head 41 of the connecting bolt 4 can be pressed against the outside of the square opening 1.

[0024] Tightening the connecting bolt 4 onto the connecting block 3 allows the sidewalls of the square tube 2 and the square opening 1 to be pressed together through the connecting block 3 and the head 41 of the connecting bolt 4. This ensures that the square tube 2 and the square opening 1 fit tightly together, making it difficult for them to shift relative to each other. As a result, even if the car bumps during driving, the square tube 2 and the square opening 1 will not collide with each other, thus preventing noise and wear caused by collisions.

[0025] Specifically, the screw includes a threaded portion 42 and a smooth portion 43. The threaded portion 42 is threadedly engaged with the connecting hole 31, and the smooth portion 43 passes through the side wall of the connecting block 3, the square tube 2 and the square opening 1 and extends out of the square opening 1.

[0026] Specifically, the screw also includes a limiting part 44, which is located at the end of the smooth rod part 43 away from the threaded part 42; a retaining pin 5 is detachably connected to the limiting part 44.

[0027] The limiting part 44 and the locking pin 5 are designed to prevent the screw from disengaging from the connecting block 3, the square opening 1 and the square tube 2.

[0028] Specifically, the limiting part 44 is provided with an annular groove 441 surrounding the limiting part 44, and the locking pin 5 is engaged in the groove 441. In the prior art, a hole is usually made in the limiting part 44 that penetrates the limiting part 44 radially, and then the locking pin 5 is inserted into the hole to connect the locking pin 5 to the limiting part 44. However, in actual use, since the number of rotations of the screw is not fixed, the orientation of the through hole is not fixed. As a result, when both ends of the through hole are blocked by external devices, the locking pin 5 is not easy to engage. With the setting of the groove 441 in this application, the locking pin 5 can be engaged in the groove 441 on the outside of the screw from a convenient angle, no matter how many times the screw rotates.

[0029] Specifically, the outer sleeve of the screw is provided with a washer 6, which is disposed between the head 41 of the bolt 4 and the square opening 1; the washer 6 includes at least a flat washer 6 and a spring washer 6.

[0030] Specifically, the sides of both ends of the connecting hole 31 are provided with chamfers to facilitate the insertion of the screw.

[0031] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A connecting device for a square opening (1) of a trailer bar, used to connect the square opening (1) of the trailer bar to the square tube (2) of a trailer hitch connector, characterized in that: Includes a connecting block (3), which is inserted into the square tube (2). The two opposite sides of the connecting block (3) are set as two connecting surfaces. The connecting block (3) is provided with a connecting hole (31) that passes through the connecting block (3) in a direction perpendicular to the connecting surface. The two side walls of the square tube (2) and the two connecting surfaces, as well as the two side walls of the square opening (1) and the two connecting surfaces, are provided with through holes that can be aligned with the connecting hole (31). And a connecting bolt (4), the connecting bolt (4) including a screw and a head (41), the screw passing through at least one through hole of the square opening (1) and the square tube (2) and threadedly engaging with the connecting hole (31), the head (41) of the connecting bolt (4) being able to abut against the outside of the square opening (1).

2. The connecting device for the square opening (1) of a trailer boom according to claim 1, characterized in that: The screw includes a threaded part (42) and a smooth part (43). The threaded part (42) is threaded into the connecting hole (31). The smooth part (43) passes through the side wall of the connecting block (3), the square tube (2) and the square opening (1) and extends out of the square opening (1).

3. A connecting device for a trailer boom square opening (1) according to claim 2, characterized in that: The screw also includes a limiting part (44), which is disposed at the end of the smooth rod part (43) away from the threaded part (42); A locking pin (5) is detachably connected to the limiting part (44).

4. A connecting device for a trailer boom square opening (1) according to claim 3, characterized in that: The limiting part (44) is provided with an annular groove (441) surrounding the limiting part (44), and the locking pin (5) is engaged in the groove (441).

5. A connecting device for a trailer boom square opening (1) according to claim 1, characterized in that: The screw sleeve is provided with a washer (6), which is located between the head (41) of the bolt (4) and the square opening (1).

6. A connecting device for a trailer boom square opening (1) according to claim 5, characterized in that: The gasket (6) includes at least a flat gasket (6) and a spring gasket (6).

7. A connecting device for a trailer boom square opening (1) according to claim 1, characterized in that: The sides of both ends of the connecting hole (31) are provided with chamfers to facilitate the insertion of the screw.

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