Rock drill driving mechanism with new spline copper bush

Abstract

The utility model discloses a rock drill drive mechanism with novel spline copper bush, including rear casing and impact casing, be provided with transmission connecting rod, transmission gear and core gear in the rear casing, transmission gear is fixed on transmission connecting rod, transmission gear and core gear are engaged transmission between, be provided with the bit tail in the impact casing, the spline copper bush is cooperated in the core gear, the spline copper bush cross section outside is constituted by six side curves, is passed through arc transition between two adjacent side curves, the cooperation between six side curves and arc can be approximately described as circle, the cross section inside of spline copper bush includes a plurality of spline tooth and spline groove, the number of spline tooth and spline groove can be divided by 6, the utility model drive mechanism adopts novel spline copper bush, and its contact area is big and is evenly distributed, can bear higher load, reduces stress concentration, is especially suitable for low -speed heavy load scene of rock drill class mine mechanical equipment.

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