This paper elaborated the anti-loosening method of adjusting nuts for automotive rack and pinion steering gears, and studied the riveting point method using riveting head to damage the threads of adjusting nuts. In this paper, the number of riveting head, the distribution of riveting head, and the riveting pressure were used as control variables, and the loosening torque of the adjusting nut after riveting, the deformation of the pressure block hole of the steering gear housing were utilized as evaluation indicators. According to the test, when 6 riveting heads are evenly distributed on the pitch diameter circle of the adjusting nut thread circumferentially to rivet the steering gear nut, the deformation of the pressure block hole of the housing is less affected, and the locking torque of the adjusting nut is also less affected. Finally, the method of adjusting nut riveting point for steering gear is obtained, in which 6 rivet heads are uniformly distributed on the pitch diameter circle of the adjusting nut thread along the circumferential direction, with riveting pressure of 30 kN riveting pressure as optimal.

Rack and pinion steering gear  /  Adjusting nut  /  Deformation of the pressure block hole  /  Loosening torque