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US 8,979,211 B2Granted
Demountable pin and collet assembly and method to securely fasten a ranging arm to a longwall shearer using such assembly
AssigneeSolvay Chemicals, Inc.
InventorsShawn Marshall, Jody Don Burgener
Life of this patent
Estimating the term…
Abstract
A pin-and-collet assembly, a longwall shearer comprising a ranging arm attached to a lifting bracket with such assembly, a method for the secure fastening of one piece to another, such as securely fastening the ranging arm to the lifting bracket of a longwall shearer using such assembly as a bushing, and a method for longwall mining of ore, such as trona, using such longwall shearer. This assembly is easy to install, does not have to be tightened during longwall operation of an ore panel, and is also demountable when it is time to stop the longwall mining operation and time to remove/replace the ranging arm for maintenance and/or when the end of the ore panel is reached.
Claims20
An assembly for fastening two parts together, comprising:
- a first pin comprising a first central axis bore therethrough and a first outer circumferential surface;
- a second pin comprising a second central axis bore therethrough and a second outer circumferential surface;
- a collet comprising an inner collar defining a central axis aperture and comprising two collet sections divided by said inner collar, said collet comprising a first section adapted to receive the first pin, the first collet section having an inner surface which makes contact with the first outer circumferential surface of the first pin, said collet further comprising a second section adapted to receive the second pin, the second collet section having an inner surface which makes contact with the second outer circumferential surface of the second pin;
- a first end cap comprising a central axis hole bored therethrough and being adapted to cover one outer end of the first pin, wherein the first end cap has a plurality of first peripheral holes, each first peripheral hole being adapted to receive a first fastener;
- a second end cap comprising a central axis hole bored therethrough and being adapted to cover an outer end of the second pin, wherein the second end cap has a plurality of second peripheral holes, each second peripheral hole being adapted to receive a second fastener;
- a bolt adapted to pass through the central axis hole of one of the first and second end caps, the central axis bore of one of the first and second pins, the collar central axis aperture, the central axis bore of the other pin, and the central axis hole of the other end cap, said bolt comprising at least one threaded end onto which a nut is threaded to tighten the first and second pins into place inside the collet;
- a plurality of first fasteners adapted to be inserted into the plurality of first peripheral holes of the first end cap and to exert a force on the first pin;
- and
- a plurality of second fasteners adapted to be inserted into the plurality of second peripheral holes of the second end cap and to exert a force on the second pin;
- wherein each of the first and second pins, the collet, and each of the first and second end caps have a common central axis.
7 more elements
An assembly for fastening a ranging arm to a lifting bracket of a longwall shearer, comprising:
- a first tapered pin comprising a first central axis bore therethrough and a first outer circumferential tapered surface;
- a second tapered pin comprising a second central axis bore therethrough and a second outer circumferential tapered surface;
- a collet comprising an inner collar defining a central axis aperture and two collet tapered sections divided by said inner collar, said collet comprising a first collet tapered section adapted to receive the first tapered pin, the first collet tapered section having an inner surface which makes contact with the first outer circumferential tapered surface of the first tapered pin, said collet further comprising a second collet section adapted to receive the second pin, the second collet tapered section having an inner surface which makes contact with the second outer circumferential tapered surface of the second tapered pin;
- a first end cap comprising a central axis hole bored therethrough and being adapted to cover one flat outer end of the first tapered pin, wherein the first end cap has a plurality of first peripheral holes, each first peripheral hole being externally threaded to receive a fastener which is a set screw with matching threading;
- a second end cap comprising a central axis hole bored therethrough and being adapted to cover one flat outer end of the second tapered pin, wherein the second end cap has a plurality of second peripheral holes, each peripheral hole being externally threaded to receive a fastener which is a set screw with matching threading;
- a bolt adapted to pass through the central axis hole of one of the first and second end caps, the central axis bore of one of the first and second tapered pins, the collar central axis aperture, the central axis bore of the other tapered pin, and the central axis hole of the other end cap, said bolt comprising at least one threaded end onto which a nut is threaded to tighten the first and second tapered pins into place inside the collet;
- a plurality of first fasteners to be threaded into the plurality of first peripheral holes of the first end cap and to exert a force on the first tapered pin;
- and
- a plurality of second fasteners to be threaded into the plurality of second peripheral holes of the second end cap and to exert a force on the second tapered pin;
- wherein each of the first and second tapered pins, the collet, and each of the first and second end caps have a common central axis.
7 more elements
Dependencies are inferred from the claim text.