Innovative stair climber using associated wheels

doi:10.1007/s11465-016-0374-1

Front. Mech. Eng.

2016, Vol. 11

Issue (3) : 299-310 https://doi.org/10.1007/s11465-016-0374-1

RESEARCH ARTICLE

Innovative stair climber using associated wheels

Girish Sudhir MODAK(

),Manmohan Manikrao BHOOMKAR

Department of Mechanical Engineering, Amrutvahini College of Engineering, Sangamner 422608, India

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Abstract

The study proposes an innovative and completely new but low-cost configuration of a platform that can easily climb stairs. This platform serves the purpose of a chassis. Different versions, such as staircase-climbing wheelchair or staircase-climbing trolley for material transferring, can be derived depending on the structure built on the platform. The driving wheels have a shape that completely matches with the profile of the steps. Complex components are eliminated. Thus, this platform is conveniently applicable in the configurations useful for climbing staircases.

Keywords stair-climbing platform matching wheels impaired mobility affordable configuration

Corresponding Author(s): Girish Sudhir MODAK

Online First Date: 24 March 2016 Issue Date: 31 August 2016

Cite this article:

Girish Sudhir MODAK,Manmohan Manikrao BHOOMKAR. Innovative stair climber using associated wheels[J]. Front. Mech. Eng., 2016, 11(3): 299-310.

URL:

https://academic.hep.com.cn/fme/EN/10.1007/s11465-016-0374-1
https://academic.hep.com.cn/fme/EN/Y2016/V11/I3/299

Fig.1 Paper cutout of a stair

Fig.2 Profile of a staircase as a rack

Fig.3 Wheel blank

Fig.4 Relative positions of blank and pitch line

Fig.5 Initial position at the start of generation

Fig.6 Transfer of rack profile on wheel blank

Fig.7 Generation of conjugate wheel started

Fig.8 Progress of wheel generation

Fig.9 Completed profile of the proposed wheel with three lobes

Fig.10 Completed profile of the proposed wheel with four lobes

Fig.11 Paper models of the wheels

Fig.12 Conjugate action verification

Fig.13 Profile in contact with the flat portion of step

Fig.14 Increment in radius

Fig.15 Angle nomenclature for the wheel

Fig.16 Generalized relative dimensions

Fig.17 Conjugate curve generated in software

Fig.18 Wheel generated in the software

Fig.19 Modeled wheel in contact with step

Tab.1 Standard dimensions

Fig.20 Spreadsheet of the DOE calculations (column marked with yellow color is optimum because the torque requirement is minimum)

Fig.21 Prototype of the proposed platform

Fig.22 Attachment for planar motion

Fig.23 Bracket in working position

Fig.24 Bracket in retracted position

Fig.25 Removal of the lock

Fig.26 Retracted bracket at the start of the ascend

Fig.27 Start of the ascend of the complete setup

Fig.28 Brackets in retracted position

Fig.29 Setup fabricated at full scale

1?Chassis; 2?Bearing housings; 3?Axles; 4?Sprocket wheels; 5?Mechanical chain; 6?Reduction drive; 7?Single phase alternating current motor as prime mover; 8?Driving wheels having generated outline; 9?Hubs for mounting the drive wheels; 10?Nuts and bolts

Tab.1

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