Front axle assembly for drive-by-wire chassis of unmanned vehicle

Abstract

The invention discloses a front axle assembly for a drive-by-wire chassis of an unmanned vehicle. The front axle assembly comprises a support assembly (3), a drive-by-wire steering engine (1), a coupler (2) and a mechanical steering engine (4). The steer-by-wire machine (1) and the mechanical steering machine (4) are coaxially connected through the coupler (2), and the steer-by-wire machine (1) and the mechanical steering machine (4) are fixed on the support assembly (3). The connecting mode of the steer-by-wire machine (1) and the mechanical steering machine (4) is improved, and the steer-by-wire machine (1) and the mechanical steering machine (4) are coaxially arranged through the coupler (2), so that the mechanism is more compact, and the space utilization rate of a vehicle is increased; and moreover, the transmission path of the steering torque is reduced, and the steering response speed of the vehicle is increased. The coupler (2) allows the steer-by-wire machine (1) and the mechanical steering machine (4) to have a certain installation coaxiality error, the mechanical steering machine (4) is fixedly connected to an axle and jumps together with the axle, and then the influence of wheel jumping and different loads on the toe-in angle of a front wheel is counteracted.

Description

technical field [0001] The invention belongs to the technical field of a control-by-wire chassis of an unmanned vehicle, and in particular relates to a front axle assembly used for a control-by-wire chassis of an unmanned vehicle. Background technique [0002] At present, most of the front axle assembly of the wire-control chassis includes the steering system. The wire-control steering gear is fixed on the frame, and is connected with the mechanical steering gear through the traditional double cross universal joint, which has the advantage of reliable connection. However, the double cross universal joints will cause a part of the transfer energy loss, and will make the steering torque transmission path output from the steer-by-wire gear to the mechanical steering gear longer, resulting in reduced steering response speed. The traditional double cross universal joint transmission needs to ensure a certain angle to achieve constant speed transmission, so it generally requires a...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the front axle assemblies of the wire-control chassis include the steering system. The wire-control steering gear is fixed on the frame and connected to the mechanical steering gear through the traditional double cross universal joint, which has the advantage of reliable connection. However, the double cross universal joint will produce a part of the transmission energy loss, and will make the steering torque output path from the steering-by-wire steering gear to the mechanical steering gear longer, resulting in a decrease in steering response speed

The traditional double cross universal joint transmission needs to ensure a certain angle to achieve constant speed transmission, so it generally requires a large layout space. In traditional passenger cars, the steering wheel and mechanical steering gear itself require a long distance transmission , so it is very suitable to use the traditional double cross universal joint form, but for unmanned vehicles, a steering wheel is not needed, and the steering of the vehicle is driven by a multi-wire steering machine, and the use of double cross universal joint transmission will take up more space. Large vehicle layout space is not suitable for drive-by-wire vehicle chassis with limited layout space

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