Steering-device outer end cover assembly and device thereof

Abstract

The invention provides a steering-device outer end cover assembly and a device thereof. The outer end cover assembly comprises an outer end cover body. A reducing penetrating structure is arranged on the inner side of the outer end cover body in the axial direction, a third circular groove, a second circular groove and a first inner circular face are sequentially formed from the outer end to the inside, a circular boss (E) is formed in the outside of the inner end of the outer end cover body, and forms a circular cavity (F), and the circular cavity (F) is communicated with a cavity formed by the first inner circular face. The outer end cover assembly is suitable for a heavy-re-circulating-ball-type bi-module electric power steering device, and the technical aims of installation, fastening and the like of an input-shaft machine locking device are achieved.

Description

technical field [0001] The invention belongs to the application field of electromechanical systems and motor vehicles, and in particular relates to a heavy-duty circulating ball type dual-mode electric power steering device. Background technique [0002] From the perspective of the automobile industry, as the number of fuel vehicles continues to grow, vehicle emissions are causing more and more serious pollution to the environment. At the same time, oil, as a non-renewable energy source, is also facing the crisis of depletion. Vehicles and hybrid vehicles have become the focus of the government and society because of their advantages of energy saving and environmental protection, and have become the core development theme of today's wheeled vehicle technology. Electric power steering technology (EPS) has been widely used in domestic and foreign household vehicles due to its significant advantages such as high integration, energy saving, and maintenance-free, but it is mostly...

AI Technical Summary

Problems solved by technology

Due to practical factors such as the large load on the steering axle of heavy vehicles (generally more than 4 tons) and the singleness of the layout of the power steering device (usually located in the power cabin), the use of rack and pinion steering devices or steering column steering devices cannot meet the requirements. , it is necessary to adopt a recirculating ball structure with high overall structural strength and strong impact resistance, and the current recirculating ball steering structure only exists in heavy-duty hydraulic power steering devices and has nothing to do with electric power steering systems

[0007] 2. The structural strength requirements of key components and parts are high, and the system matching is difficult

As far as the recirculating ball hydraulic power steering is concerned, its screw, gear fan shaft, housing, steering nut and other components are often damaged due to external impact loads

[0008] 3. Electromechanical matching is difficult

[0009] In addition, due to the realization principle and structural characteristics of the recirculating ball dual-mode electric power steering device, the simplest and most effective way to realize the mechanical locking of the two-stage transmission system inside the recirculating ball dual-mode electric power steering device is to mechanically lock the input shaft The relative rotation between the main body of the steering gear and the mechanical locking of the input shaft generally adopts the mechanical locking device of the input shaft spline sleeve at present. Therefore, in the recirculating ball dual-mode electric power steering The end cover must solve technical problems such as the installation and fastening of the input shaft mechanical locking device without affecting the main structure of the recirculating ball dual-mode electric power steering device

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