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轮胎式行走机械(包括汽车)都会遇到因内胎漏气而需要修补的问题,补胎前需先分离外胎和轮辋,然后取出内胎,即通常所说的“扒轮胎”。其过程大致可以分解为三步:第一步是用撬棍取出卡环和可拆卸轮缘;第二步是使轮辋与外胎分离;第三步是取出垫带和内胎。其中第一步和第三步是容易做到的,只有第二步分离轮辋和外胎比较困难,往往要费很大力气,花费很多时间。这是为什么呢?
Tire-type walking machines (including automobiles) are subject to problems that need to be repaired due to leakage of the inner tire. Before the tires are repaired, the tires and rims must be separated, and then the inner tires, which are commonly referred to as “tire tires”, are removed. The process can be roughly divided into three steps: the first step is to use a crowbar to remove the snap ring and the removable rim; the second step is to separate the rim from the tire casing; and the third step is to take out the pad and the inner tube. Among them, the first step and the third step are easy to do. Only the second step is more difficult to separate the rims and the tires. It usually takes a lot of effort and time. Why is this?