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Stair climbing

About: Stair climbing is a research topic. Over the lifetime, 1610 publications have been published within this topic receiving 30504 citations.


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Patent
14 Sep 2018
TL;DR: In this article, a small electric manned stair climbing vehicle with a single front wheel, sliding through double rear wheels and supported by three wheels is described, where the axle distances between the front wheel and the rear wheels are shorter, and a rotary speed regulating handlebar can control the climbing speed of the vehicle.
Abstract: An electric manned stair climbing vehicle is a small electric manned stair climbing vehicle driven by a single front wheel, sliding through double rear wheels and supported through three wheels, wherein the axle distances between the front wheel and the rear wheels are shorter, when a user stands on left and right pedals and the gravity of the user body is located between the front wheel and the rear wheels and the front wheel performs driving, a climbing wheel of the quincuncial climbing front wheel climbs on steps and meanwhile rolls forward, the climbing wheel rolls to be close to the frontsteps, then the climbing wheel at the front end continues to climb and roll, the left and right combined rear wheels and the quincuncial climbing front wheel perform synchronous climbing and sliding,and the front wheel and the rear wheels are always positioned on the front and rear steps of a stair to climb. In the stair up and down process of the stair climbing vehicle, a parking position can be locked, an armrest of the stair climbing vehicle is pulled backward, the front wheel upwarps, the left and right combined rear wheels land and slide, so that the stair climbing vehicle walks like acommon hand buggy walking on an even road. A wheel axle motor and a hub-type speed reducer form an efficient speed reducing motor having a large torque and light weight. A rotary speed regulating handlebar can control the climbing speed of the stair climbing vehicle, and a lithium battery can be charged by a charger after electricity is used up.

3 citations

Patent
21 Feb 1984
TL;DR: A baggage cart with two wheels 5 and three-stage extendable and retractable arms as discussed by the authors has a pair of runners pivotably connected to the arms to make smooth the movement of the cart over stair steps.
Abstract: A baggage cart with two wheels 5 and three-stage extendable and retractable arms (1) has a pair of runners (6) pivotably connected to the arms (1), to make smooth the movement of the cart over stair steps. A strut 8 is releasably engaged with catches 9 or 10 on the arms to vary the position of the runners 6.

3 citations

Journal ArticleDOI
TL;DR: It is suggested that a genu varum deformity could affect the pelvis, hip and knee kinematics during stair walking and the biomechanical risk factors that could result in the articular impairments by the excessive loads from lower limb malalignment were identified.
Abstract: Purpose: This study examined the effects of the lower limb alignment on the pelvis, hip, and knee kinematics in people with genu varum during stair walking. Methods: Forty subjects were enrolled in this study. People who had intercondylar distance ≥4cm were classified in the genu varum group, and people who had intercondylar distance <4cm and intermalleolar distance <4cm were placed in the control group. 3D motion analysis was used to collect the pelvis, hip, and knee kinematic data while subjects were walking stairs with three steps. Results: During stair ascent, the genu varum group had decreased pelvic lateral tilt and hip adduction at the early stance phase and decreased pelvic lateral tilt at the swing phase compared to the control group. At the same time, they had decreased minimal hip adduction ROM at the early stance and decreased maximum pelvic lateral tilt ROM and minimum hip rotation ROM at the swing phase. During stair descent, the genu varum group had decreased pelvic lateral tilt at the early stance and decreased pelvic lateral tilt and pelvic rotation at the swing phase. In addition, they had decreased pelvic frontal ROM during single limb support and increased knee sagittal ROM during the whole gait cycle. Conclusion: This study suggests that a genu varum deformity could affect the pelvis, hip and knee kinematics. In addition, the biomechanical risk factors that could result in the articular impairments by the excessive loads from lower limb malalignment were identified.

3 citations

Patent
02 Jan 2013
TL;DR: In this article, a stair climbing machine is described, which is a dynamoelectric mechanical device capable of climbing up and down along stairs, in particular to a stair-climbing machine.
Abstract: The utility model relates to a dynamoelectric mechanical device capable of climbing up and down along stairs, in particular to a stair climbing machine. The stair climbing machine comprises a driving forward helical wheel mechanism, a driving climbing helical wheel mechanism, a mechanism preventing tumbling forward and halting backward and a direction control mechanism. A motor is in a driving section of the stair climbing machine is used to drive a chain ratchet wheel and to drive a left helical wheel and a right helical wheel to rotate, and forward motive power is formed. A climbing mechanism of the stair climbing machine adopts a helical wheel forward installation angle as a climbing carrier. The helical wheels have a plurality of stress points which are continuous and uninterruptible, and when a front stress point of the helical wheels does not bear force, then a subsequent stress point keeps up and bears force, and gyroscopic motion is transformed to rectilinear motion directly, and therefore transmission efficiency is high and energy consumption is low. The stair climbing machine has the advantages of being small in size, convenient to use, low in overall gravity center, stable in operation, easy to manufacture, low in machining cost, convenient to maintain, and low in using and maintaining cost and the like.

3 citations

Journal ArticleDOI
TL;DR: Predicting the improvement of spinal musculoskeletal loadings during level walking and stair climbing after two simulated interventions revealed the different compensatory responses on the spinal load sharing.
Abstract: Background. Low back pain (LBP) continues to be a severe global healthy problem, and a lot of patients would undergo conservative or surgical treatments. However, the improving capacity of spinal load sharing during activities of daily living (ADLs) after interventions is largely unknown. The objective of this study was to quantitatively predict the improvement of spinal musculoskeletal loadings during level walking and stair climbing after two simulated interventions. Material and Methods. Twenty-six healthy adults and seven lumbar disc herniation patients performed level walking and stair climbing in sequence. The spinal movement was recorded using a motion capture system. The experimental data were applied to drive a musculoskeletal model to calculate all the lumbar joint resultant forces and muscle activities of seventeen main trunk muscle groups. Rehabilitation and reconstruction were selected as the representative of conservative and surgical treatment, respectively. The spinal load sharing after rehabilitation and reconstruction was predicted by replacing the patients’ spine rhythm with healthy subjects’ spine rhythm and altering the center of rotation at the L5S1 level, respectively. Results. During both level walking and stair climbing, the joint resultant forces of the lower lumbar intervertebral discs were predicted to reduce after the two simulated inventions. In addition, the maximum muscle activities of the most trunk muscle groups decreased after simulated rehabilitation and conversely increased after simulated reconstruction. Conclusion. The predictions revealed the different compensatory responses on the spinal load sharing after two simulated interventions, severing as guidance for making preoperative planning and rehabilitation planning.

3 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202344
2022121
202165
202090
2019129
201896