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Be it drinks, clothes, electrical appliances, the delivery directly to the house is in. This also applies to supermarkets. One of them left the RM Customs GbR build a small series of e-trikes to slow down traffic jams and make a contribution to environmental protection. For more comfort and safe steering are Brake cylinder there ACE Shock GmbH installed.
Delivering goods by vans and trucks poses increasing problems for cities: the growing number of deliveries to the house is creating ever more congested roads. Because next to the actual routes, the parking space search is added. E-cargo bicycles are the greener and faster choice at a delivery radius of 2 km, as in this case.
Cooperation with Edeka
A first cooperation of the company RM Customs from Kleve on the Lower Rhine with the local Edeka Center Schroff confirms this. Custom-built by RM Customs in low-floor construction, the cargo bike can often reach its maximum speed of 45 km / h even on busy roads and, thanks to a small photovoltaic system in direct sunlight, can even reach more than the standard 60 km of range. Thus, despite a storage volume of the equivalent of eight shopping baskets with a maximum total weight of 100 kg, the battery of the load wire must not be recharged after only a few deliveries.
Finally, the eco-bike has a baptized, innovative cargo bike with a front hub motor and has a power of 2,3 kW with a maximum torque of 120 Nm, which are available to the supplier almost directly from a standstill. A consumption of about 2,5 kWh per 100 km corresponds to 0,32 l petrol or 0,25 l diesel. If additional power is supplied by the already mentioned photovoltaic system, the range increases accordingly or it supports the charging process at the socket.
E-trike optimized with hydraulic brake cylinders
Before co-operating with Edeka, RM Customs had already put a prototype of its e-trike on the road, which reached a speed of 25 km / h. During its development, the problem arose that the whole system rocked in potholes or sudden steering movements and threatened to overturn the vehicle. This was also a complaint of the TÜV. As the development reaches a maximum speed of 45 km / h, the founders of RM Customs, Dr.-Ing. Marcel Rouenhoff and Dipl.-Ing. Markus Mühlberg, fix the restlessness in the suspension.
A first trial with industrial gas springs did not meet the requirements. In the second attempt, they turned to the gas spring team of ACE shock absorber GmbH. There, innovative and high-quality gas pressure and gas tension springs are offered. Due to positive experiences with applications in the leisure industry, the engineers of ACE in Langenfeld knew that their hydraulic brake cylinders would also be better suited for the stabilization of vehicles than gas springs. In addition to the automotive sector, industrial applications such as classic mechanical engineering, the electronics and furniture industries and medical technology are typical applications for these design elements. Hydraulic brake cylinders are predestined for the damping of reciprocating masses.
After taking into account all key data, both sides decided to install components of the Type HB-28-100-EE-PT, These hydraulic brake cylinders can be used as two-way or one-way brakes. Their slim-line coated bodies and wear-resistant plunger rods are features of high quality and longevity.
As with all representatives of the HB family, the model used is a maintenance-free, ready-to-install and closed system. The HB-28 is adjustable and, with a diameter of 28 mm and a stroke of 100 mm, provides a variably adjustable pressure or traction force from 30 to 3000 N. A setting segment on the piston makes the easy adjustment possible, with a large selection on attachments additionally facilitates the assembly.
After the solution found with the help of ACE worked well in the first two series of RM Customs e-trikes, the development of the next generation is currently underway. It is worked on even more ride comfort, a larger trunk volume and a higher range. An endeavor that will surely succeed in the ever-increasing demand for e-trikes.
The author is Robert Timmerberg MA, journalist, Plus2 GmbH, Dusseldorf.
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