electric hammer

An electric hammer and support ring technology, applied in the direction of striking tools, lightweight impact tools, manufacturing tools, etc., can solve problems such as overheating deformation of the head shell, and achieve the effect of reducing impact force, high impact resistance, and speeding up the progress of work.
CN102501223BActive Publication Date: 2015-08-05ZHEJIANG BENYU TOOLS
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG BENYU TOOLS
Publication Date
2015-08-05

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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.
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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...

Claims

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