In recent years, with the aging of China's population and the emergence of people with disabilities, the wheelchair industry has developed rapidly. According to statistics, in 2008, China produced 3.8 million wheelchairs and exported 2.5 million. In recent years, the annual growth rate is still close to 30%. China has developed into the world's largest producer of wheelchairs. However, the rapid growth of manual wheelchair production has led to the uneven quality of manual wheelchairs. The company will rectify the following points.
The following is the list of contents.
Tolerances of manual wheelchair
Manual wheelchair wheels on the ground
Glove of manual wheelchair handle
Tolerance of manual wheelchair
The impact strength test involves hitting the backrest, hand ring, casters, and front frame of a manual wheelchair with a pendulum of specified mass. These are also the parts of the manual wheelchair that may be impacted in use, just like the impact of the user on the backrest and the impact of the obstacle on the hand ring, casters, and footrest when the user is sitting in the wheelchair. The fatigue strength test consists of two items: the double roll test and the drop test, which are tests of the quality of manual wheelchair vehicles. The double-roll test involves placing the wheelchair on a special double-roll tester and installing a test dummy.
Impact blocks are installed in the middle and on the double rollers. The rollers hit the wheelchair wheels once for each rotation. According to this requirement, the double rollers rotate at least 200,000 revolutions, which means at least 200,000 impacts to the wheelchair. In the drop test, after the test dummy was installed, the whole vehicle was lifted horizontally by 50 mm and dropped freely on a hard surface, with 6666 drops according to this requirement. The standard requires that after the above static strength, impact strength, and fatigue strength tests, there are no fractures or obvious cracks in the wheelchair parts, no deformation, failure, or inability to adjust the parts that affect the function of the wheelchair, no loosening of the adjustable parts. No adjustable parts are loose or fall off, and all parts can operate normally. All strength tests conducted by our company require that the tests be conducted on the same manual wheelchair. Generally speaking, these items have strict structural requirements for manual wheelchairs.
Manual wheelchair wheels on the ground
Wheel landing performance requires that when the manual wheelchair lifts one of the wheels 20 mm, the other three wheels must land smoothly. Otherwise, when the manual wheelchair is used on uneven roads, it may cause operational difficulties and hidden dangers due to the wheels not touching the ground. The factor that affects wheel landing is the structure of the wheelchair vehicle, and the failure is usually the cause of the assembly. The support frame of a manual wheelchair is composed of a cross of two support bars mounted under the seat. If the cross bars are too loosely attached, it will cause the manual wheelchair structure to be loose and may not meet the strength requirements; it will cause the wheelchair structure to be too rigid and may not meet the wheel landing requirements. To solve the problem of wheel landing without reducing the overall strength of the manual wheelchair, our company believes that the most important thing in the development process is to control the assembly of the crossbars.
Glove of manual wheelchair handle
Manual wheelchairs require a handling glove that is tested to require that the handle glove does not slip or fall off under a certain amount of tension. This is to prevent the person who needs to push or pull the wheelchair from being in danger due to a loose glove. Generally, manufacturers use the principles of thermal expansion and cold contraction to match the gloves. The gloves are placed into the handle tube in the heated state and contract when cooled, securing them to the handle tube. However, gloves assembled in this way are not secure, especially since they will almost certainly loosen after the first slip. Therefore, our company will add a set screw to the handle during the development process to ensure that it will not loosen.
The company promises to be more attentive and to continuously improve the quality of manual wheelchairs to create products that will reassure and satisfy consumers. After reading the above, if you are interested in manual wheelchairs, you can visit our company's website at www.topmediwheelchair.com, and we look forward to your arrival.
