Two-way push-pull chain and reciprocating actuator

摘要

A link member includes a first pin hole, a second pin hole, a first engaging portion, and a second engaging portion. The second pin hole is an elongated hole extending in a longitudinal direction of a two-way push-pull chain. The pin is movably inserted into the second pin hole and fixed to the first pin hole. With the pin being movably inserted into the second pin hole, adjacent link members are expandable and contractible relative to each other by a length. The length is greater than a length of a portion where the first engaging portion contacts the second engaging portion in a state where the adjacent link members are contracted relative to each other.

主权项

1. A two-way push-pull chain formed by connecting a plurality of link members arranged along a longitudinal direction of the two-way push-pull chain by pins and having a first end and a second end, wherein the second end is opposite to the first end, and wherein the link member comprises:
a first pin hole provided on a first end of the link member; a second pin hole provided on a second end of the link member; a first engaging portion provided on the first end of the link member; and a second engaging portion provided on the second end of the link member and engageable with a first engaging portion of an adjacent link member, and wherein one of the first pin hole and the second pin hole comprises an elongated hole extending through the link member in a lateral direction and being elongated in the longitudinal direction, and the other pin hole comprises a fixing hole; a pin movably fitted in the elongated hole and fixed to the fixing hole, such that the pin is moveable in a longitudinal direction with respect to the elongated hole and substantially fixed in a longitudinal direction with respect to the fixing hole; wherein the pin is rotatable within the first pin hole and the second pin hole; with the pin being movably fitted in the elongated hole, adjacent link members are expandable and contractible relative to each other by a predetermined distance in a longitudinal direction in which the chain is adapted to receive a compression force; and the predetermined distance is equivalent to a maximum displacement of the link member with respect to the adjacent link member, and the predetermined distance is greater than a distance in the longitudinal direction along which the first engaging portion contacts the second engaging portion when adjacent link members are contracted relative to each other.