The structure of the wheelchair

structure wheelchair

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The structure of the wheelchair
big wheel
Carry the main weight. The diameter of the wheel is 51, 56, 61, 66cm. Pneumatic tires are often used, except for a few solid tires that are required by the use environment.
small wheel
There are several diameters of 12, 15, 18, and 20cm, and the small wheel with a large diameter is easy to cross small obstacles and special carpets. However, if the diameter is too large, the space occupied by the entire wheelchair becomes larger, making it inconvenient to move. The normal small wheel is before the big wheel, but in the wheelchair for paraplegics, the small wheel is often placed after the big wheel. It should be noted that the direction of the small wheel should be perpendicular to the big wheel, otherwise it is easy to fall.
hand wheel
Unique to wheelchairs, the diameter is generally 5cm smaller than the large rim. When the hemiplegia is driven with one hand, an additional one with a smaller diameter is available for selection. The hand wheel rim is generally pushed directly by the patient. If the function is not good, for easy driving, the following changes can be made: (1) Add rubber on the surface of the hand wheel rim to increase the grinding force. ⑵ Increase the push handle (knob) along the circumference of the hand wheel. There are the following types of push handles: ① Horizontal push handle. For C5 spinal injuries. Therefore, when the biceps are healthy, the hand is placed on the push handle, and the cart can be pushed forward by flexing the elbow. If there is no horizontal push handle, it cannot be pushed. ② Push the handle vertically. For rheumatoid arthritis when shoulder and hand joint movement is limited. Therefore, the horizontal push handle cannot be used. ③ Bold the push handle. It is used for patients with severely limited finger movement and it is difficult to make a fist. It is also suitable for patients with osteoarthritis, heart disease or the elderly. (Hand wheelchair is driven by hand instead of hand wheel rim)