Barrier-Free Wheelchair with a Mechanical Transmission

Lee, Jongseok; Jeong, Won-Hyeong; Han, Jae-Oh; Kim, Taesu; Oh, Seong-Hwan

doi:10.3390/app11115280

Cited by 12 publications

(15 citation statements)

References 6 publications

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“…To improve user convenience, various technological research is being undertaken on electric wheelchairs that can climb stairs. Chung-Ang University's Robotics Engineering Laboratory researched and developed a wheelchair that can climb stairs using a link structure and a mechanical transmission system that rotates the entire driving part through an actuator to change speed [5]. The first mode is driven by a caterpillar, while the second uses wheels.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, one of the problems of the electric wheelchair [5] introduced earlier was solved using two motors by controlling the position of the front wheel landing gear using a linear actuator, however, this type of drive mode switching is not very reliable. The reason is the synchronization of the two actuators connected to the landing gear and the heavy load placed on the landing gear.…”

Section: Introductionmentioning

confidence: 99%

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Design of Wheelchair Drive Unit Capable of Driving on Roads and Obstacles with Shape Conversion

Jeong,

Kwon,

Youm

et al. 2024

Applied Sciences

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Wheelchairs are widely used globally and are essential for providing autonomy and mobility to elderly and disabled people who have movement restrictions. Manual wheelchairs require operation through turning the wheels or pushing the wheelchair directly, thus posing mobility limitations for the user and caregiver. In contrast, electric wheelchairs, when used by the user, allow for improved flexibility by operating the wheelchair through a single control mechanism. However, the use of electric wheelchairs poses challenges in accessing areas with stairs and curbs, limiting the range of activity and thereby diminishing the quality of life for users and those reliant on electric wheelchairs. The electric wheelchair developed in this research incorporates a single motor for lightweight design. It uses a wheel travel variation actuator, eliminating the need for synchronization and allowing for low-power operation. This design reduces power loss from the caterpillar’s idling during wheel movement and includes the implementation of a pulley system. The optimal pulley belt length was calculated, and a deceleration device was installed inside the caterpillar, enabling a design that is compact, lightweight, and capable of high deceleration. On paved roads and flat terrain, the electric wheelchair is designed for high-speed travel using two pairs of front omni wheels and drive wheels. For terrains with stairs, speed bumps, unpaved roads, and unavoidable obstacles, the wheelchair is powered by caterpillars. The electric wheelchair developed through the research presented in this paper has verified the reliability of its transmission system through gear stress and deformation analysis. Additionally, an electric wheelchair based on the proposed concept was constructed to validate the drivability, safety, operability, and convenience of its driving unit. Furthermore, a user rode the constructed electric wheelchair to confirm that there were no issues with its drivability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of Wheelchair Drive Unit Capable of Driving on Roads and Obstacles with Shape Conversion

Jeong,

Kwon,

Youm

et al. 2024

Applied Sciences

Self Cite

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show abstract

“…(27,28) MRs with multiwheel or track structures have been found to be effective for assisting robots in climbing steps. (29)(30)(31)(32) Baishya et al collated and analyzed various existing types of step-climbing robot, such as the leggy type, track type, hybrid leggy-track type, and two-wheel and three-wheel cluster types, and provided a qualitative comparison of their advantages and disadvantages. (32) The four-wheeled robot equipped with Mecanum wheels, (33)(34)(35) driven by four independent servomotors, is capable of moving in any direction on a plane without requiring the prior rotational adjustment of the robot body.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Novel Omnidirectional Step-climbing Robot

Wei,

Yang,

Chen

et al. 2024

Sensors and Materials

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“…The locomotive function of the wheelchair is strongly dependent on its structure and was developed towards reducing weight and size [5], strengthening the frame [6] and adjusting the motion control function depending on the person's disability [7]. Structural improvement increasing the safety of movement [8,9] and systems facilitating manual propulsion of a wheelchair (e.g. through the use of gears) are also subject to research and analysis [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of a Hybrid Manual–Electric Wheelchair Propulsion System on the User’s Muscular Effort

Wieczorek

Warguła

Kukla

2023

Acta Mechanica Et Automatica

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Self-propelled wheelchairs favour the rehabilitation process, forcing the user to be physically active. Unfortunately, in most cases, the manual propulsion is not adapted to the individual needs and physical capabilities of the user. This paper presents the results of operational tests of a wheelchair equipped with a hybrid propulsion system in which the muscle strength generated by the user is assisted by two independent electric motors. The research aimed to investigate the influence of the applied control algorithm and the assistance factor (W) on the value of the muscular effort (MA) while propelling the wheelchair with the use of push rims. A modified ARmedical AR-405 wheelchair equipped with two MagicPie 5 electric motors built into the wheelchair’s hubs with a power of 500 W was used in this research. The tests were carried out on a wheelchair test bench simulating the moment of resistance within the range of 8–11 Nm. Surface electromyography was employed for the measurement of MA, specifically, a four-channel Noraxon Mini DTS apparatus. The research was carried out on five patients from the group of C50 anthropometric dimensions. The effort was measured for four muscles: deltoid–anterior part, deltoid–posteriori part, and triceps brachii and extensor carpi radialis longus. The effectiveness of the hybrid propulsion system was observed based on the extensor carpi radialis longus muscle. In this case, for the standard wheelchair, the MA ranged from 93% to 123%. In contrast, for a wheelchair equipped with the hybrid propulsion system, at W = 70%, the MA was within the range of 43%–75%.

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Barrier-Free Wheelchair with a Mechanical Transmission

Cited by 12 publications

References 6 publications

Design of Wheelchair Drive Unit Capable of Driving on Roads and Obstacles with Shape Conversion

Design of Wheelchair Drive Unit Capable of Driving on Roads and Obstacles with Shape Conversion

Design and Analysis of a Novel Omnidirectional Step-climbing Robot

Influence of a Hybrid Manual–Electric Wheelchair Propulsion System on the User’s Muscular Effort

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