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发明授权
CN1975203B 棘轮式张紧器 失效 - 权利终止

棘轮式张紧器
摘要：
本发明的目的在于提供一种可对应于下述发动机的棘轮式张紧器，该发动机需要具有当利用棘轮式张紧器对链条施加适当的张力时柱塞的后退定位机构不工作的部分；以及当运转一定时间经过后链条伸长时后退定位机构工作的部分。该棘轮式张紧器(1)具有：柱塞(4)，其可向前方突出地嵌合插入于张紧器主体(2)；棘轮(9)，其被轴支撑在该主体(2)上。柱塞(4)上形成有在前方具有不与棘轮的爪(9a)卡合的平坦部(7b)的齿条部(7)，而在该平坦部(7b)的后方形成有构成阻止柱塞的后退位移的后退定位机构(11)的齿条齿(7c)。
摘要（英）：

The invention provides a ratchet type chain tensioner for an engine which is provided with a mean that the receding location mechanism of the plunger does not work when the ratchet type chain tensioner applies appropriate tension on the chain, and a mean that the receding location mechanism works after some time during which the chain has been prolonged. The ratchet type chain tensioner 1 has a plunger 4 which projects to the front so as to engage into the tensioner main body 2, and a ratchet wheel 9 supported upon the tensioner body 2 by a shaft. A rack 7 having a plane part whose front end does not engage with the pawl 9a of the ratchet wheel is formed on the plunger 4, and a rack tooth 7c for constituting the receding location mechanism 11 for blocking the plunger 4 to recede is formedat the rear of the plane part 7b.

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