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Invention Application
WO2015006195A1 EXPANDING PISTON HYDRAULIC CHAIN TENSIONER 审中-公开
膨胀活塞式液压拉杆机

EXPANDING PISTON HYDRAULIC CHAIN TENSIONER
Abstract:
A tensioner (10) for an endless loop power transmission member can include the assembly of a plunger (12) operably engageable with an endless loop power transmission member, and a piston (14) guiding the plunger (12) for sliding coaxial movement in a direction of the endless loop power transmission member and defining an oil reservoir (26) for receiving hydraulic fluid. A bearing (28) can have bearing balls (30) located in a counter bore (32) coaxial with piston bore (34). The counter bore (32) can have a steep taper (36) on which the bearing balls (30) ride, such that as the plunger (12) moves in an extending direction, the bearing balls (30) move out of the counter bore (32) allowing free extending movement of the plunger (12), and as the plunger (12) moves in a retracting direction, the bearing balls (30) are driven down into the steep taper (36) preventing the plunger (12) from retracting.
Abstract(Chinese):

用于无端环动力传递构件的张紧器（10）可以包括可操作地与无端环动力传递构件接合的柱塞（12）的组件，以及引导柱塞（12）的活塞（14），用于在 并且限定用于接收液压流体的储油器（26）。 轴承（28）可以具有位于与活塞孔（34）同轴的反向孔（32）中的轴承滚珠（30）。 沉孔（32）可以具有陡峭的锥形部分（36），轴承滚珠（30）在该锥形部分上行进，使得当柱塞（12）沿延伸方向移动时，轴承滚珠（30）从反向孔 （32），允许柱塞（12）的自由延伸运动，并且当柱塞（12）沿回缩方向移动时，轴承滚珠（30）被向下驱动到陡锥形部分（36）中，从而防止柱塞（12） 回缩。

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