Pure electric vehicle and rear auxiliary frame thereof

Abstract

The invention discloses a pure electric vehicle and a rear auxiliary frame thereof. The auxiliary frame comprises two longitudinal beams and two transverse beams, transverse beam connectors are arranged at the two ends of each transverse beam, the longitudinal beams are provided with corresponding longitudinal beam connectors, and the transverse beam connectors and the longitudinal beam connectorsare fixed in a butt joint mode. Each longitudinal beam is of an integrally cast hollow structure, the auxiliary frame comprises a front suspension sleeve for installing a front suspension, and the front suspension sleeve penetrates through and is connected with the inner sides and the outer sides of the longitudinal beams. The longitudinal beams and transverse beams of the rear auxiliary frame are fixed in a butt joint mode through corresponding connectors, most installation points can be arranged on the longitudinal beams, and if the distance between wheels needs to be adjusted, widening ornarrowing of the auxiliary frame can be achieved only by replacing the transverse beams with the corresponding lengths. If the number of the rear suspensions needs to be adjusted, the transverse beamswith the corresponding number of the rear suspension sleeves can be replaced. Therefore, according to the scheme, the same platform can meet the change requirements of various vehicle types under thecondition of minimum change. Moreover, each longitudinal beam is of a hollow structure, so the weight can be reduced; and the front suspension sleeve is connected with the inner side and the outer side of the longitudinal beams, so the connection strength can be enhanced.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a pure electric vehicle and its rear subframe. Background technique [0002] Generally, in models with front powertrain, the design of the rear subframe does not need to consider the influence of the powertrain, but only needs to provide mounting points for the suspension and peripheral parts, and provide sufficient strength, so its design space Relatively abundant, the design difficulty is relatively low. [0003] With the development of new energy vehicles, for pure electric vehicles, there are more and more models with rear-mounted motor and rear-drive. The rear subframe needs to provide enough space for the motor and the drive shaft of the motor, and even needs to fully carry the motor, while still Provide mounting points for parts of the suspension and other surrounding systems. In this way, the design space becomes narrow, there are many constraints, and the dif...

AI Technical Summary

Problems solved by technology

However, the current rear sub-frame is mainly formed by stamping steel plates. There are many parts and complex matching. Any change in any part will affect the structure of the entire rear sub-frame. It is difficult to achieve common use with minimal changes.

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