US 5,167,437 A · Mechanisms for drawing a chain into or through a channel of a chain guide

Abstract

A retraction mechanism for drawing a plough drive chain into a chain channel of a coal plough guide built onto the side of a scraper chain conveyor comprises a retraction slide which can be drawn through the chain channel and guided. The plough chain is connected to the slide which, via a chain section and a chain claw can be connected to an external traction drive, preferably to the scraper chain assembly of the scraper chain conveyor, so that the mechanism can draw the plough drive chain through the chain channel. The traction chain incorporates an overload clutch which limits the traction force. The clutch has two complementary parts one of which has a detent ball pressed by a prestressed spring into a detent recess of the other clutch part, so that the clutch is closed. A releasable lock or fixing device secures the detent ball in its released position.

Claims15

Dependent claims

A mechanism for drawing a chain into or through a chain channel guide, particularly a coal plough guide built onto a scraper chain conveyor;

said mechanism comprising a retraction slide for passing through an opening in the channel which extends longitudinally of the channel and to which the chain can be connected at one end, a traction member which is affixed to the retraction slide, connection means for connecting the traction member to a traction drive outside the channel and an overload protection clutch incorporated in the traction member, said clutch comprising one part provided with a detent element preloaded with spring means and another part provided with a recess for receiving the said detent element.

Dependencies are inferred from the claim text.

Mechanisms for drawing a chain into or through a channel of a chain guide

Life of this patent

Mechanisms for drawing a chain into or through a channel of a chain guide

Life of this patent

Abstract

Claims15