Limb Exercise Machine Cross-Linked Transmission
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Solution Overview
Problem
Conventional limb exercise machines do not coordinate the motion of upper and lower limbs effectively, leading to inefficient exercise due to alternating hand and foot movements that do not align with human kinesiology.
Innovation Solution
A limb exercise machine with a base featuring obliquely extending slide rails and transmission units that synchronize the movement of hand and foot control members, utilizing pulley systems and resistance devices to facilitate staggered, coordinated swings of the upper and lower limbs, aligning with natural human motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the right-foot pedal is connected to the right-hand handle and the left-foot pedal is connected to the left-hand handle, then the structure is simple and easy to manufacture, but the motion is not coordinated and does not align with human kinesiology
Solution Approach 1:
The patent connects the right-foot pedal to the left-hand handle and the left-foot pedal to the right-hand handle, merging the control functions across opposite sides. This cross-connection arrangement synchronizes the movement of opposite limbs (right foot with left hand, left foot with right hand), creating coordinated full-body motion that aligns with natural human kinesiology while maintaining structural simplicity
2Adaptability or versatility
If the pedals are stepped down alternately, then the structure enables alternating exercise of upper and lower limbs, but the motion is not coordinated and unable to provide better exercise effect
Solution Approach 1:
The patent employs dynamic synchronization through the transmission mechanism where alternating pedal depression (right foot then left foot) is converted into synchronized, coordinated movement of all four limbs. The mechanical linkage ensures that when one pedal is pressed, the opposite hand moves in coordination, creating a dynamic, rhythmic exercise pattern that enhances exercise effectiveness by engaging the entire body in a coordinated manner
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The machine enables more coordinated and smooth exercise movements, enhancing the effectiveness of the workout by mimicking natural walking motion and providing adjustable resistance for increased difficulty.
Implementation Method 1
The first transmission unit includes an upper left link connected to the left-hand control member and a lower right link connected to the right-foot control member. The upper left link and the lower right lower link are fixedly connected by a first transverse rod.
Implementation Method 2
each of the left-hand control member, the right-hand control member, the left-foot control member and the right-foot control member is provided with a roller frame resting on the corresponding slide rail
Implementation Method 3
The resistance device includes four springs. Two of the springs are connected to the left-foot control member, and the other two of the springs are connected to the right-foot control member.
Data Source
AI summary
A limb exercise machine includes a first transmission unit and a second transmission unit. A left-hand control member, as well as a right-foot control member, is connected to the first transmission unit. The left-hand control member and the right-foot control member are pulled by the first transmission unit to be moved synchronously. A right-hand control member, as well as a left-foot control member, is connected to the second transmission unit. The right-hand control member and the left-foot control member are pulled by the second transmission unit to be moved synchronously.