© Photo | © AAT Alber Antriebstechnik

A helping hand

Pushing and braking aids from AAT help wheel­chair users improve their everyday mobility

Steep inclines or ramps shouldn’t pose an obstacle to wheel­chair users or the people who help push them. The v-max 4 pushing and braking aid from AAT Alber Antrieb­stechnik GmbH provides a helping hand here. Whether uphill or down­hill, the drive accel­er­ates or slows the wheel­chair wher­ever it goes.


The v-max 4 pushing and braking aid can be retro­fitted to virtu­ally all common wheel­chairs.

One of the great advan­tages of the v-max 4 pushing and braking aid from AAT is that it can be retro­fitted to virtu­ally all common wheel­chairs. A manual wheel­chair can be converted in no time. The battery is placed under the seat cover and has a range of up to 24 kilo­me­tres. The manual wheel­chair wheels are replaced with AAT’s special sprocket wheels. The gear wheels on the drive shafts of the v-max 4 inter­lock in the sprocket and transfer the drive or braking forces directly to the wheels.

The drive unit is inserted in a special holder behind the wheelchair’s back­rest and connected to the battery. All that is left is to move the ergonomic control handles into posi­tion and the user can hit the road. The user can engage and disen­gage the system and control the drive at the touch of a button with the help of an inte­grated display.

Maximum power, minimum size

The v-max 4 pushing and braking aid is powered by ECI 63 series motors from ebm-papst. They are light, compact, powerful and dynamic – perfect for the require­ments AAT has for its drive units.

ECI 63 modular system

ECI_63_motor_K4_ebm-papstModern minia­ture drives for automa­tion, labo­ra­tory, medical or pack­aging tech­nology often have to perform highly indi­vidual tasks. A new approach when building drive systems equipped for a specific appli­ca­tion has been devel­oped by the drive system experts at ebm-papst St. Georgen. Indi­vidual modular subgroups can be config­ured and assem­bled to form a drive system according to a require­ments profile spec­i­fied by the user. The first motor option avail­able is the version ECI 63 with best values for rated output of up to 400 W and 1000 mNm plus an motor effi­ciency of almost 90% with just 63 mm diam­eter.

More about the ECI 63 modular system.

Also excel­lent are the motors’ long service life and resis­tance to wear. The elec­tronic control means that the EC motors can be perfectly commu­tated. This helps the wheel­chairs master even steep inclines. The small dimen­sions and low weight make trans­port easier and increase the range.

“The pushing and braking aid aims to make life easier for patients and their carers”, explains Philipp Rauch, Sales Exec­u­tive for indus­trial drive engi­neering at ebm-papst St Georgen. “This is exactly what our dynamic drives do, even under diffi­cult condi­tions like extreme temper­a­tures, steep inclines or high patient weight.”

Proven coop­er­a­tion

AAT and ebm-papst have been working together on useful everyday aids for wheel­chair users since 2004. Their list of devel­op­ments includes an elec­tric auxil­iary drive that has all the advan­tages of a self-propelled drive system but can also be used as a pushing and braking aid.

Other devel­op­ments in over a decade of coop­er­a­tion include elec­tric auxil­iary drives for manual wheel­chairs that help people who are obese or have limited mobility travel inde­pen­dently. Impor­tant factors for the engi­neers are the range of the battery, the weight of the complete drive unit and the func­tion­ality. These are impor­tant because they are designing a product that gives people precious freedom and inde­pen­dence.

Required fields: Comment, Name & Mail (Mail will not be published). Please also take note of our Privacy protection.