The emergence of wheelchairs has greatly facilitated the life of the elderly, but many elderly people often need others to carry them out due to lack of physical strength. Therefore, electric wheelchairs just appear, and along with the development of electric wheelchairs, electric stair-climbing wheelchairs gradually begin to appear. This wheelchair can easily realize stair climbing, and can better solve the problem of the elderly going up and down the stairs, especially for those old-fashioned residential buildings without elevators. Electric stair climbing wheelchairs are divided into step support stair climbing wheelchairs, star wheel stair climbing wheelchairs and crawler stair climbing wheelchairs. Next, let's take a look at the detailed knowledge of the electric stair climbing wheelchair.
1.Step-support stair-climbing wheelchair
The step-supported stair-climbing wheelchair has a history of nearly a hundred years. After continuous evolution and improvement, it is now a kind of more complicated transmission mechanism among all forms of stair-climbing wheelchairs. Its principle is to imitate the climbing action of the human body, and it is alternately supported by two sets of supporting devices to realize the function of going up and down stairs. The safety of the step-support stair climbing wheelchair is much higher than other types, and it has been widely used in many developed countries.
The transmission mechanism of the step-supported stair climbing wheelchair is complex and highly integrated modular structure, and the use of a large number of high-hardness and light-weight materials leads to its high cost.
2.star wheel stair climbing wheelchair
The climbing mechanism of the star wheel type climbing wheelchair is composed of several small wheels evenly distributed on the "Y", "five-star" or "+" shaped tie bars. Each small wheel can not only revolve around its own axis, but also revolve around the central axis with the tie bar. When walking on the flat ground, each small wheel rotates, while when climbing stairs, each small wheel rotates together, thus realizing the function of climbing stairs.
The track width and depth of each small wheel of the star wheel climbing wheelchair are fixed. In the process of crawling stairs of different styles and sizes, it is easy to appear dislocation or slipping. In addition, most of the domestic star wheel climbing wheelchairs have not been equipped with the function of anti-skid braking.
If it slips during use, it will be difficult for the user to control the wheelchair, which weighs 50 kilograms. Therefore, the safety of this star wheel is a wheelchair for climbing stairs. But the structure of this star-wheel stair climbing machine is simple, and the cost is low, and it still has a certain market in the families whose economic conditions are not very good.
3.Crawler stair climbing wheelchair
The working principle of this crawler-type stair-climbing wheelchair is similar to that of a tank. The principle is very simple, and the development of crawler technology is relatively mature. Compared with the star-wheel type, this crawler-type stair-climbing wheelchair has a certain improvement in the way of traveling. The crawler-type transmission structure adopted by the crawler-type stair-climbing wheelchair improves the safety through the grip of the crawler when climbing stairs with a large slope, but it is prone to front and rear roll problems during the climbing process. When encountering stairs, the user can put the crawlers on both sides to the ground, then put away the four wheels and rely on the crawlers to complete the function of climbing stairs.
The crawler type stair climbing wheelchair also has certain problems in the process of work. When the crawler goes up or down a step, it will tilt forward and backward due to the deviation of the center of gravity. Therefore crawler-type stair-climbing wheelchair is not suitable for use under the environment of too smooth stair steps and inclination greater than 30-35 degrees. Moreover, the track wear of this product is relatively large, and the repair cost in the later maintenance is high. Although the use of high-quality crawler tracks will improve the wear resistance, it will also cause damage to the stair steps. Therefore, the cost of the crawler-type stair-climbing wheelchair and the later use will generate a large economic cost.
Out of the absolute need to ensure the safety of the disabled and the elderly going up and down the stairs, priority will still be given to safer rather than cheaper wheelchairs for climbing stairs. It is believed that with the high reliability of the step-supported stair climbing wheelchair, it will gradually become the mainstream stair climbing wheelchair in the future to serve more disabled and elderly groups.
Post time: Dec-30-2022
