Insert for attaching a tip of an excavator tooth

E - Fixed Constructions – 02 – F

Patent

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294/36

E02F 9/28 (2006.01)

Patent

CA 1105523

ABSTRACT OF THE DISCLOSURE A retainer for removable attachment of a tip of an excavator tooth, provided with a sleeve, to a retainer rigidly connected to a digging edge of an excavator bucket and engaging in the sleeve. The retainer is arranged in an aperture running parallel with a cutting edge of the tooth-tip and along a longitudinal centreline of the tooth. The retainer consists of two shaped metal parts with a rubber element stressed in com- pression arranged therebetween. The retainer comes to rest when installed, on the one hand, against the surfaces of the tooth-tip apertures facing the cutting edge and, on the other hand, against the surfaces of a recess arranged in the retainer, the surfaces being remote from the cutting edge. The shaped metal part facing the cutting edge and having its long sides open and webs fitted to its end faces, is accommodated with clearance between the legs of the other, U-shaped metal part facing the digging edge and also having its long sides open. The two rubber elements uniting the two shaped metal parts are protected from stresses exceeding their fatigue strength. The width of the gap between the end face of the leg of the shaped metal part facing the digging edge, and the internal wall of the sleeve aperture, is smaller than the admissible spring travel required to maintain the fatigue strength of the said rubber element. The external surface of the shaped metal part facing the cutting edge is provided with cams serving to pre- vent the retainer from falling out when the tooth-tip is under load.

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