electric hammer

Abstract

The invention discloses an electric hammer which comprises a head shell and a rotary sleeve. A through hole is arranged in the head shell. The rotary sleeve is positioned in the through hole. A bearing and a sealing ring are respectively arranged between the head shell and the rotary sleeve. The sealing ring is positioned at one side of the bearing. The rotary sleeve can rotate relative to the head shell. An outer ring of the bearing extends towards the side of the sealing ring to form a supporting ring. The width of the supporting ring is greater than the width of an inner ring of the bearing. The outer peripheral surface of the sealing ring is abutted against and connected with the inner peripheral surface of the supporting ring. The inner peripheral surface of the sealing ring is abutted against and connected with the outer peripheral surface of the rotary sleeve. The supporting ring is fixedly connected with the inner wall of the through hole of the head shell. The electric hammer has the beneficial effects that the problem of oil leakage is fundamentally solved; the operating efficiency and the working accuracy can also be improved; and the service life of the electric hammer is prolonged; and the electric hammer is energy-saving and has low cost and low noise.

Description

technical field [0001] The present invention relates to an electric tool, and more specifically, the present invention relates to a multifunctional electric hammer which can be switched between drill, hammer and chisel. Background technique [0002] The rotary sleeve of the electric hammer needs to rotate relative to the head shell, the head shell and the rotary sleeve need to be connected by bearings, the bearings need to be lubricated with lubricating oil, and the passage between the bearing and the outside world needs to be sealed to prevent the lubricating oil from leaking out. At present, the electric hammer produced by electric tool manufacturers, including large multinational companies with strong foreign technical strength, usually injects the head shell in advance, and then installs the sealing ring and bearing in the head shell, because the bearing and the head shell installed in this way The coaxiality between them is difficult to guarantee. In order to ensure th...

AI Technical Summary

Problems solved by technology

Since the outer ring of the bearing extends toward the side of the sealing ring to form a supporting ring, the outer peripheral surface of the sealing ring abuts against the inner peripheral surface of the supporting ring, and the inner peripheral surface of the sealing ring abuts against the outer peripheral surface of the rotary sleeve, In this way, the sealing ring and the bearing can maintain a good coaxiality, and the inner and outer peripheral surfaces of the sealing ring are in contact with the metal, and the heat generated by friction is not enough to deform the metal, so the problem of the sealing ring is fundamentally solved. Concentricity, oil leakage caused by overheating and deformation of the head shell, prolong the continuous use time of the electric hammer, improve operating efficiency, and speed up the progress of the operation

Images