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Light, cost-effective, uncomplicated: igubal spherical bearings in jogging strollers

The JogAlong baby carriage combines the usual transport function with exercise: it has ergonomically shaped arm levers that mimic the natural swing of the arms - making it ideal for combining jogging with a stroll for the child. Spherical igubal bearings are at the heart of the design.

What was needed: Bearing between the arm levers and their connecting piece
Requirements: Realisation of several degrees of freedom, lightweight, cost-effective, durable
Industry: Baby carriages
Success for the customer: igubal EGLM spherical bearings provide three degrees of freedom, reduce the complexity of the assembly and thus reduce costs and weight compared to the originally intended designs. The fact that they are lightweight, lubricant-free and corrosion-free makes them the perfect alternative to metal bearings.

igubal EGLM spherical bearings in the JogAlong stroller

igubal EGLM rod end

igubal EGLM

Press-fit spherical bearing: dirt-resistant, corrosion-free and maintenance-free

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Pillow block bearings and fixed flange bearings, rod ends and more: get the box to learn more about igubal spherical bearings

Problem

To imitate the natural arm movement when running, the baby carriage is equipped with two arm levers like a cross trainer. To generate the pivoting motion, the JogAlong engineers originally connected the two levers at the rotary axis with shafts and a differential gearbox. The latter had to be made of metal to cope with the high torque and to keep the diameter of the gears as small as possible. This solution was too complicated, too heavy and too expensive. The challenge was to find another way to manage the many degrees of freedom between the levers and the connecting link, to simplify the connection and to realise it as easily and cost-effectively as possible.

Solution

After numerous further attempts, igus finally found the solution: spherical igubal spherical bearings from the EGLM series, mounted between the levers and a second connecting piece. The bearings permit three degrees of freedom simultaneously: the spherical outer diameter allows the connecting piece to pivote in relation to each lever; the cylindrical inner hole of the ball is used for an axial sliding degree of freedom in addition to a rotational degree of freedom. This significantly reduced the complexity of the assembly and therefore also the costs and weight. An additional plus: the bearings do not require lubrication or maintenance.

JogAlong baby carriage folded up

Installed between the arm levers and their connecting piece: spherical bearings from the EGLM series made of solid plastic

The bearings enable an uncomplicated design with three degrees of freedom.

igubal rod end bearings

Pillow block, flanged and spherical bearings, coupling joints and rod ends

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