Pintle hook

Abstract

The invention discloses a pintle hook, and belongs to the field of automobiles. The pintle hook comprises a trailing hook and a trailing nut, wherein a connecting thread is formed on the trailing hook; a connection hole is formed in the trailing nut, and comprises an internally threaded section which is in matched connection with the connecting thread and can accommodate the connecting thread; the trailing hook comprises a shoulder and a matching body; the matching body is connected with the connecting thread; the shoulder comprises a trailing hook end surface extending to form the matching body; a transitional region is arranged at the joint of the trailing hook end surface and the matching body; a withstanding surface propped against the trailing hook end surface is arranged at one end of the trailing nut; the connection hole further comprises a matching section and an externally threaded relief groove; the matching section can accommodate the matching body in a matched manner; and the externally threaded relief groove is used for protecting the trailing hook. The fixed end of the pintle hook is moved to the transitional region from the externally threaded relief groove, so as to reduce the bending stress and the shearing force of the externally threaded relief groove, avoid plastic deformation or fracture of the externally threaded relief groove, solve the problems of deformation and fracture of the pintle hook, and improve the safety and the reliability during the operation of the pintle hook.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a tow coupler suitable for M1 type vehicles. Background technique [0002] The tow hook on the M1 vehicle is generally installed at the front lower part and the rear lower part of the vehicle. When the vehicle breaks down, the tow hook needs to be used to tow the vehicle. At present, there are two main types of tow couplers used on M1 vehicles: one is welded tow coupler, which directly welds the tow coupler to the lower front and rear parts of the vehicle. Passability is poor and has been seldom used. The other is a detachable tow hook. This detachable tow hook includes a tow hook and a tow nut. The tow nut is fixed on the bumper beam of the vehicle body. The internal thread connected with the external thread of the tow hook is provided with an undercut groove at the root of the external thread of the tow hook. [0003] However, according to feedback from the aftermarket, existing d...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problem that the trailer hook is prone to deformation and breakage during the trailer operation, the embodiment of the present invention provides a trailer hook

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