Non standard chains are used for traction, and the manufacturing accuracy requirements for chain length may be slightly lower than those for transmission chains (the tolerance for measuring the length of parking equipment chains is the nominal length of the measured chain)^+0.20_%TheAnd the precision roller chain used for transmission is the nominal length of the chain^+0.15%).

In order to improve the fatigue performance of parking equipment chains (the minimum dynamic load strength index of various specifications of chains in JB/T 11079-2011 is higher than that of transmission roller chains with the same pitch size in GB/T 1243), non-standard chains must be subjected to a pre tension test with a load not less than 40% of the minimum tensile strength of the chain. For high-strength chains, the pre tension load can be appropriately increased to reach 50%~60% of the minimum tensile strength of the chain, but the pre tension load cannot exceed 60% of the minimum tensile strength of the chain to avoid the occurrence of yield deformation and failure during pre tension inspection.

The design of the connectors at both ends of the non-standard chain is also important. The strength of the connectors and the pins used to connect the chain base chain should not be less than the minimum tensile strength of the selected chain. The length and thread of the connector screws should meet the requirements for reliable installation on parking equipment; Due to the characteristic of multiple (usually ≥ 4) chains being used simultaneously in the same parking space, in order to compensate for the length deviation between the chains and ensure that the parking platform lifted during operation does not tilt and rises smoothly, the thread length on one end of the connecting piece is usually used for adjustment. The length of the hinge should not be less than twice the nominal pitch of the corresponding selected chain.

The design and selection of non-standard chains and steel block chains are basically the same as plate chains, but many of these chains are applied in non-standard chains
Under normal operating conditions, we need to focus on considering the use of certain chains based on their different usage environments or structural characteristics
Personality issues on:

The circular arc surface at the end of the middle chain block in the steel block chain is equivalent to the rollers of the roller chain, so it is necessary to ensure that this circular arc surface is well meshed with the sprocket teeth during design and manufacturing.

The chain used for lifting water gates should have its corrosion resistance improved through special surface treatment or the use of stainless steel materials.

The traction chains such as plate chains used in high-temperature environments in steel mills should be made of high-temperature resistant alloy structural steel. If necessary, special high-temperature resistant lubricating grease can be applied to the hinge parts of the chains.

For traction chains used in dusty environments, more attention should be paid to improving the wear resistance of the chain by increasing the effective hardening layer depth on the surface of the parts after heat treatment or special hardening treatment on the surface of the parts

The traction chain used in high temperature and dust environments should also have the clearance between the chain hinges and the side clearance between the chain plates appropriately enlarged to prevent the occurrence of chain biting during operation.