Tricycle, body-propelled vehicle or training device with rod-based rowing drive

The tricycle's innovative drive system integrates arm and leg movements in a straight line, using swivel seat steering and modified gears for continuous propulsion, addressing safety and ergonomic challenges in rowing drive mechanisms, ensuring safe and efficient operation for diverse users.

DE102018010193B4Active Publication Date: 2026-01-08MAIER FERDINAND
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Patent Information

Application Number
DE102018010193
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2017-12-28
Filing Date
2018-12-19
Publication Date
2026-01-08
Estimated Expiration
2038-12-19

AI Technical Summary

Technical Problem

Existing designs for road vehicles incorporating rowing drive mechanisms face challenges in ensuring safe steering, independent operation of brakes and gears, and ergonomic efficiency, often leading to complex and unsafe designs unsuitable for practical application.

Method used

A tricycle design with a drive system that integrates arm and leg movements in a straight horizontal line, using a swivel seat steering mechanism, easy-to-use brakes, and a parallelogram-shaped drive linkage with a double rail guide to maintain straight paths for handlebars and pedals, combined with a sliding joint transmission and modified derailleur gears for continuous propulsion.

Benefits of technology

The design allows for effortless and roadworthy operation, suitable for various applications, including sports and everyday use, and accommodates individuals with disabilities, with continuous propulsion and ergonomic efficiency.

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Abstract

Rowing drive for a tricycle, other body-powered vehicle or training device, characterized by the following features: - the longitudinal tube (L), which forms the front part of the chassis, branches out at the rear end into two steeply sloping tubes (Y), which transition into parallel, horizontally positioned tubes (H) that support the two rear wheels - The longitudinal tube (L) is surrounded by a slightly wider outer tube (O), which either ends behind the drive linkage or just before the end of that longitudinal tube (L) and in this variant also supports the driver's seat there. - said drive linkage, which hangs in the middle between the driver's seat and the front wheel with a solid axle (E) on the outer tube (0), consists of four parallelogram-shaped rods (a, b, c, d), of which the two longer ones (a, b) either extend upwards, as arm rod (a), or downwards, as leg rod (b), from the parallelogram and carry the handlebar (g) or the pedal rod (p) at their free end. - the two shorter parallel crossbars (c, d) connect the arm and leg bars (a, b) with four joints (A, B, C, D) and, when pulled or pushed, rotate with the handle and / or pedal bar (g, p) so that they pull the arm bar (a) downwards and the leg bar (b) upwards as both approach their mean path position and thereby straighten from the inclined position to the vertical; and because both movements continuously compensate for each other, they result in straight horizontal paths for the handle and pedal bar (g, p) - The axis (E) around which the lower crossbar (d) rotates divides it into unequal sections, which is why the arm rod (a) connected to the longer section has a larger oscillation amplitude than the leg rod (b) - above the axis (E) on the outer tube (O) stands a vertical rail (T) on which the joint (C) transformed into a slide (tsl) between the tip of the leg rod (b) and the upper crossbar (c) rises and falls during the drive movement - a device which first strictly determines the paths of the handle and pedal rod (g, p).
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