Shell assembly and device of an electric power steering device

Abstract

The invention provides a housing assembly of an electric power steering device and a device of same. The housing assembly comprises a first installation cavity, a second installation cavity and a third installation cavity, wherein the first installation is arranged along a horizontal direction and a non-through cavity; the second installation cavity is a non-through cavity; the third installation cavity is a through cavity; the first installation cavity communicates with the second installation cavity; the first installation cavity communicates with the third installation cavity; and the second installation cavity does not communicate with the third installation cavity. The housing has great overall strength and can stand complicate shock and vibration and has reliable use; the housing assembly has great technology property and is easy to process and form; low cost is required, so the housing assembly is suitable for batch production and has high integrating degree and great assembling performance; and the housing assembly is applied to the steering device.

Description

technical field [0001] The invention belongs to the application fields of electromechanical systems and motor vehicles, and in particular relates to a heavy-duty recirculating ball type dual-mode electric power steering device and a housing assembly thereof. 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 ...

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

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