英文文献及翻译

ABSTRACT

An impact crusher with a rotor and one or more impact members interconnected to form an adjustable impact member system，a first impact member being mounted pivotally around a first horizontal axis by way of at least one drive means，on the second horizontal axis of which a further impact member，pivotal by way of at least one drive means，is provided，in which context the horizontal axis pivotally supporting the impact member is provided in the region of that end of the first impact member which is remote from the horizontal axis and the second impact member comprises one or more levers.

IMPACT CRUSHER

FIELD OF THE INVENTION

Our present invention relates to an impact crusher of the type in which a rotor is Provided with crushing elements which cooperate with impact members which cooperate to form a crushing gap and to an impact member assembly suitable for use with such a rotor. Moro Particularly the invention relates to an impact crusher comprising a rotor and two or more impact members interconnected to form an adjustable impact member system，a first impact member being mounted pivotally around a first horizontal axis by way of at least one drive means，and having a second horizontal axis on which a second impact member，pivotal by way of at least one drive means，15 provided.

BACKGROUND OF THE INVENTION

An impact crusher for crushing material of various consistencies is known for example from DE 23 31 729 Al in which the impact plates are interconnected in articulated manner to form a coherent composite pivotal impact member，each of the interconnected impact plates deriving adjustable support individually from the housing. The impact plates may have impact surfaces which are at angles to one another or arc stepped along the path of the material as it 15 entrained from the inlet side of the machine.

The principles of such machines have also been developed in the Chemical Engineers Handbook，Perry and Chilton，5th edition，McGraw Hill Book Company，New York，1973，at Chapters，pages 19 ff.

This known impact crusher，just like impact other crushers of the same genus，suffers from the substantial drawback that the upper impact member，provided downstream of the machine inlet yields outwardly due to foreign objects which cannot be crushed entering the machine，so that the crushing gap between the rotor and the lower impact member is decreased to such an extent，due to the upper impact member pivoting outwardly，that a risk arises of foreign objects getting wedged between the rotor and the impact member,leading to possible damage to the rotor and/or the impact member，so that the continued operability of the installation can no longer be ensured.

OBJECTS OF THE INVENTION

It is the principal object of the present invention to provide an improved impact crusher such that the damage which can be caused by the entry of a noncrushable foreign object can be minimized. Another object of the invention is to provide an improved impact crusher which is free from the drawbacks of earlier devices or apparatuses of this type and particularly the drawbacks mentioned above.

Still another object of this invention is to provide improved impact assembly for a rotor-type crusher or breaker whereby drawbacks which could have resulted in down time can be avoided.

SUMMARY OF THE INVENTION

These objects are attained，in accordance with the invention in an impact crusher of the type in which a rotor and two or more impact members are provided along the path of the crusher members of the rotor to form an adjustable impact assembly. A first impact member is pivotally mounted at a first