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CN-224197543-U - Connecting device for square opening of trailer lever

CN224197543UCN 224197543 UCN224197543 UCN 224197543UCN-224197543-U

Abstract

The utility model discloses a connecting device for a square opening of a trailer lever, which is technically characterized by comprising a connecting block, wherein the connecting block is inserted into a square pipe, two opposite side surfaces of the connecting block are provided with two connecting surfaces, connecting holes penetrating through the connecting block along the direction perpendicular to the connecting surfaces are formed in the connecting block, two side walls corresponding to the two connecting surfaces of the square pipe and two side walls corresponding to the two connecting surfaces of the square opening are respectively provided with a through hole which can be aligned with the connecting holes, the connecting bolt comprises a screw rod and a head, the screw rod at least penetrates through the through holes on one side of the square opening and the square pipe and is in threaded fit with the connecting holes, the head of the connecting bolt can be abutted against the outside of the square opening, and one side of the square opening and one side of the square pipe can be tightly pressed together through the head of the connecting block and the bolt under the action of the connecting bolt, so that collision between the square opening and the square pipe can not happen due to automobile jolt, noise is reduced, and the service lives of the square opening and the square pipe are prolonged.

Inventors

  • LI LINSHENG
  • WANG QIANQIAN

Assignees

  • 青岛齐天大圣汽车服务有限公司

Dates

Publication Date
20260505
Application Date
20250509

Claims (7)

  1. 1. The connecting device for the square opening (1) of the trailer bar is used for connecting the square opening (1) of the trailer bar with the square tube (2) of a pulling connecting piece and is characterized by comprising a connecting block (3), wherein the connecting block (3) is inserted into the square tube (2), two opposite side surfaces of the connecting block (3) are two connecting surfaces, a connecting hole (31) penetrating the connecting block (3) along the direction perpendicular to the connecting surfaces is formed in the connecting block (3), and through holes which can be aligned with the connecting hole (31) are formed in two side walls of the square tube (2) corresponding to the two connecting surfaces and two side walls of the square opening (1) corresponding to the two connecting surfaces; And the connecting bolt (4) comprises a screw rod and a head part (41), the screw rod at least penetrates through the through holes on one sides of the square opening (1) and the square tube (2) and is in threaded fit with the connecting hole (31), and the head part (41) of the connecting bolt (4) can be abutted against the outside of the square opening (1).
  2. 2. The connecting device for the square opening (1) of the trailer lever according to claim 1, wherein the screw comprises a threaded portion (42) and a polish rod portion (43), the threaded portion (42) is in threaded fit with the connecting hole (31), and the polish rod portion (43) penetrates through the connecting block (3), the square tube (2) and the side wall of the square opening (1) and extends out of the square opening (1).
  3. 3.A connection device for a square mouth (1) of a towing vehicle according to claim 2, characterized in that the screw further comprises a limit part (44), the limit part (44) being arranged at the end of the polish rod part (43) remote from the threaded part (42); and the limiting part (44) is detachably connected with a bayonet lock (5).
  4. 4. A connecting device for a square opening (1) of a towing vehicle according to claim 3, wherein the limiting part (44) is provided with an annular clamping groove (441) surrounding the limiting part (44), and the clamping pin (5) is clamped into the clamping groove (441).
  5. 5. The connecting device for a square opening (1) of a towing vehicle according to claim 1, characterized in that the screw is sleeved with a gasket (6), and the gasket (6) is arranged between the head (41) of the bolt (4) and the square opening (1).
  6. 6. A connecting device for a square opening (1) of a towing vehicle according to claim 5, characterized in that the spacer (6) comprises at least a flat spacer (6) and a spring spacer (6).
  7. 7. The connecting device for a square opening (1) of a towing vehicle according to claim 1, wherein the side edges of the two ends of the connecting hole (31) are provided with chamfers for facilitating the insertion of a screw.

Description

Connecting device for square opening of trailer lever Technical Field The utility model relates to the technical field of trailer connection, in particular to a connecting device for a square opening of a trailer. Background The trailer bar is arranged at the tail part of the automobile and can be used as a connecting piece for dragging a trailer, a yacht, a caravan and the like. The trailer lever rotating interface is a part of the trailer lever, the whole trailer lever is connected with the pulling connecting piece through the trailer lever rotating interface, and then the connection with the article to be pulled is realized through the pulling connecting piece. In the prior art, the connecting ports of the trailer bars are mostly set to square ports, the connecting parts of the corresponding pull connecting pieces connected with the square ports are set to square pipes, the square pipes are inserted into the square ports when connected, and then the connection between the square ports and the square pipes is realized through pin shafts traversing the square ports and the square pipes. However, in the prior art, in order to make it easier to insert the square pipe into the square opening, there is a need to leave an assembly gap between the four surfaces of the square pipe and the four inner walls of the square opening, which also makes it easy for noise to be generated between the square pipe and the square opening due to mutual collision and abrasion to be generated due to mutual collision when the automobile runs on a bumpy road surface during normal towing operation. Disclosure of utility model Aiming at the defects of the prior art, the utility model aims to provide a connecting device for a square opening of a trailer, which can compress one sides of the square opening and the square pipe together through the head of a connecting block and a bolt under the action of a connecting bolt, so that collision between the square opening and the square pipe caused by bumping of a vehicle is avoided, noise is reduced, and the service lives of the square opening and the square pipe are prolonged. The connecting device for the square opening of the trailer lever is used for connecting the square opening of the trailer lever with the square tube of the pulling connecting piece and comprises a connecting block, the connecting block is inserted into the square tube, two opposite side surfaces of the connecting block are provided with two connecting surfaces, the connecting block is provided with connecting holes penetrating the connecting block along the direction perpendicular to the connecting surfaces, and two side walls of the square tube corresponding to the two connecting surfaces are provided with through holes capable of being aligned with the connecting holes; And 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 on one side of the square tube and is in threaded fit with the connecting hole, and the head part of the connecting bolt can be abutted against the outside of the square opening. The screw rod further comprises a threaded part and a polished rod part, wherein the threaded part is in threaded fit with the connecting hole, and the polished rod part penetrates through the connecting block, the square pipe and the side wall of the square opening and extends out of the square opening. The screw rod further comprises a limiting part, wherein the limiting part is arranged at one end of the polish rod part, which is far away from the threaded part; and the limiting part is detachably connected with a bayonet lock. The utility model is further characterized in that the limiting part is provided with an annular clamping groove which is arranged around the limiting part, and the clamping pin is clamped into the clamping groove. The screw is further provided with a gasket in the outer sleeve, and the gasket is arranged between the head of the bolt and the square opening. The utility model is further arranged that the spacer comprises at least a flat spacer and a spring spacer. The utility model is further provided with chamfers which are arranged on the side edges of the two ends of the connecting hole and are convenient for inserting the screw rod. In summary, compared with the prior art, the square pipe connecting device has the advantages that one side of the square pipe and one side of the square pipe can be tightly pressed together through the connecting block and the head of the bolt through the effect of the connecting bolt, so that collision between the square pipe and the square pipe caused by bumping of an automobile can be avoided, noise is reduced, and the service lives of the square pipe and the square pipe are prolonged. Drawings FIG. 1 is a schematic view of the overall structure of an embodiment; FIG. 2 is an enlarged schematic view of portion A of FIG. 1; FIG. 3 is a cross-sectional view of the overall