2015-04-20- start of series: part presentations

Together with the presentation of our vehicle, its appearance was shown off, and the inner workings became transparent. We’d now like to reveal selected components and technical details.

 

Swing arm eLi15

The swing arm is the rear axle’s and motor’s load-carrying component and inherently so a crucial component of the rear axle assembly. It is connected to the body in three points, one being a connection to the rear partition via bent sheet metal, the two other points being screws connected to monocoque side aluminum inserts.Hinterrad-Aufhaengung

Rear wheel bearing

The axle is inserted into the half domes at the bottom and then locked in place through the upper ones. The axial fixation is realized through fitted discs on the insides of the arms.

The positioning of the component within the vehicle is made possible through rotation around a fitted bolt. Guided by the slotted holes, the axle can be adapted to the vehicles’ center line.

To guarantee a possible adaptation of the motor-positioning, a guiding flute is integrated. The motor’s axle and the rear wheel’s axle being parallel, is essential for a high level of efficiency. The fine tuning of the chain’s tension – also important to maintain a high level of efficiency – is realized within the motor’s bearing.

Further additional elements are the rear brake system and a bracket for the RPM-sensor. Extra space and appropriate angles for screwing were considered.

Execution

The most important aspect regarding the construction and building of the swing arm was a lightweight structure, which lead to an aluminum execution. On top of that, the wall thickness has been reduced to a minimum. Only areas in which e.g. screws are placed, deviate. The C-Profile used for the swing arms had proven to be a suitable one for our need for a high stiffness whilst maintaining a low weight. The component’s strength was confirmed through simulation and the following tests with the actual component.

Challenges

Besides the complex mounting relative to the machine, the thin walls causing an oscillation was a challenge during manufacturing.

Posted in Allgemein.