Rublle Jaw Crusher

Rubble Jaw Crusher Instruction

The invention relates to a jaw crusher for a rubble crushing device, comprising a grab bucket provided with an inlet opening for rubble parts to be reduced in size, an outlet opening for reduced rubble parts, at least two co-acting crushing bodies for reducing rubble parts in size there between, and drive means for moving one f the at least two crushing bodies relative to the other crushing body, which drive means comprise one flywheel and at least one motor.

Known from European patent application publication number PE is a jaw crusher which is intended for attachment to a movable arm of a self propelled vehicle. The known jaw crusher comprises two co-acting crushing bodies formed by a fixed wall and a crushing plate oscillating there above which is driven by an eccentric on a shaft, this shaft being set into rotation by a hydraulic motor.

The rotation speed of the shaft, and thereby the continuity of the oscillating movement of the crushing plate, is held constant using two flywheels suspended from the ends of the shaft close to the side walls of the bucket of the jaw crusher.

Mobile Rubble Jaw Crushing

It is a drawback of the known jaw crusher that, due to the two flywheels, it is very heavy. Too great a weight makes the jaw crusher unsuitable for mounting on the boom of for instance an excavator or a wheel loader, and therefore unsuitable as jaw crusher for a mobile rubble crushing device. Owing to the placing of the flywheels in the vicinity of the side walls in the bucket the known jaw crusher is vulnerable in the case of damage to a side wall, for instance as a result of excessively violent collisions of the bucket with objects outside it, or as result of collisions of debris present in the bucket with a side wall.

There is also a chance, in the case a shaft breaks, of a flywheel breaking through a side wall, with all the associated risks for bystanders. The known jaw crusher is not suitable for removing iron from the reduced rubble parts. In respect of current legal regulations, reduced rubble parts containing iron are unsuitable for reuse, so that a separate treatment of the reduced rubble parts is necessary in a de-ironing installation.

Rubble jaw crusher is an object of the invention to provide a jaw crusher for a rubble crushing device, in particular for a mobile rubble crushing device, which jaw crusher has a sufficiently low weight to enable coupling thereof in simple manner to a movable arm of a self-propelled vehicle, for instance an excavator or a wheel loader.

A rubble jaw crusher according to the invention with only one flywheel provides the advantage of a substantial weight reduction compared to the known jaw crusher with two flywheels. Use is made here of the fact that the moment of inertia of a flywheel is determined substantially by the mass in the vicinity of the periphery of the flywheel, and a reduction of the mass in the vicinity of the shaft does not result in a substantial reduction in moment of inertia.