First, remove the rusted bolts and nuts: Soak in kerosene for 20 to 30 minutes. Hammer around the nut with a hand hammer, loosen the rust layer and unscrew it. If it still cannot be removed, use a torch to heat the nut. When the nut is heated and the screw is heated, remove the nut quickly. If it is a threaded slide fastener, drill an enlarged hole in the threaded hole, re-make the thread, and then prepare a stepped bolt with one end enlarged and the other end to maintain the original diameter, increase the original screw hole, and then machine an internal and external thread The outer diameter of the nut is matched with that of the enlarged screw hole. The inner screw hole is the same as the original diameter. Apply 502 adhesive to the outer thread, and then screw in the enlarged screw hole.
Second, the removal of broken screws: When the broken screw diameter is relatively large and loose, you can use hand hammer and flat chisel according to the opposite direction of the thread slowly removed. If the breakage head is higher than the end face, it can be twisted into a square shape or screwed out by welding a nut in the breakage head. If the breakage is less than the end surface or there is no outcrop, drill a hole in the breakage head and then wedge it into a multi-edge hardened steel file. Unscrew the reversed screw with a reverse screw. When it is allowed to increase the screw hole, drill the broken screw with a drill and increase the thread again.
Third, the disassembly screw group: In order to prevent fasteners from deformation due to uneven force, the screw group should be disassembled symmetrically diagonally. When disassembling, first loosen the screws 1 to 2 and then remove them one by one. For square or round parts, symmetrically disassembled according to the diagonal or the center of the circle; for long strips, the parts can be gradually loosened and disassembled from the two sides to the middle or from the middle to both sides in symmetrical and diagonal lines. Replace the screws in the hard-to-remove area and loosen and remove them first. When disassembling the cantilever-shaped multi-screw couplings, they should be loosened one by one from the lower side, and one or two screws at the top must be removed at last. Otherwise, accidents or parts deformation and damage may easily occur.
Types of wheelchairs
1. According to material classification, aluminum alloy, light material and steel aluminum alloy, light material and steel.
2. According to the type, it can be divided into manual Wheelchair and electric wheelchair, among which manual wheelchair can be divided into manual push and self-service type.
3. According to people's needs, it can be divided into single side wheelchair, toilet wheelchair, sports wheelchair and lying wheelchair.
4.According to whether it can be folded It can be divided into foldable and unfoldable wheelchairs.
Wheelchair
Medicare Wheelchair,Multifunction Wheelchair,Wheelchair Rehabilitation,Folding Electric Wheelchair
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