Transmission switching device of electric hammer

Abstract

The invention discloses a transmission switching device of an electric hammer, and the device comprises an intermediate shaft; an intermediate shaft gear, a transmission gear, swing rod bearings and an intermediate shaft sleeve are arranged on the intermediate shaft; a connecting part extends outwards from the transmission gear; the connecting part is sleeved on one end of the intermediate shaft sleeve; the swing rod bearings are respectively sleeved on the connecting part and the intermediate shaft sleeve; keyway matching structures are arranged between the other end of the intermediate shaft sleeve and the intermediate shaft, the connecting part and the swing rod bearings; a shift bearing is arranged on the peripheral side of the intermediate shaft sleeve; the inner ring of the shift bearing is the intermediate shaft sleeve, and a groove is arranged on the outer ring of the shift bearing; and a shifting mechanism is connected into the groove. The transmission switching device of the electric hammer has the beneficial effects that a transmission mechanism and the shifting mechanism stay still relatively, no friction, wear, heating or oil leakage occurs, the service life is long, the maintenance amount is small, the gear friction phenomenon is overcome, and the working efficiency is high.

Description

technical field [0001] The invention relates to an electric hammer, in particular to a transmission switching mechanism arranged in the electric hammer and used for the electric hammer to complete impact and drilling operations. Background technique [0002] A Chinese utility model patent (patent number: 201120173533.1) discloses a transmission mechanism for electric tools, which includes: a shaft driven by the driving mechanism of the electric tool, including a first shaft part, a second shaft part, and a The driving part between the first shaft part and the second shaft part; the gear installed on the first shaft part, the gear slides along the extension direction of the shaft relative to the first shaft part, and there is a mutual cooperation between the gear and the driving part of the shaft The driving part; the swing rod bearing installed on the second shaft part, the swing rod bearing includes an inner ring and an outer ring, the raceway between the inner ring and the...

AI Technical Summary

Problems solved by technology

On the one hand, it is easy to deform the plastic shell, on the other hand, it will also affect the overall sealing effect of the electric tool, and it is easy to leak lubricating oil. After a period of use, the surface of the electric hammer is easy to get dirty.

In addition, the shifting mechanism is in direct contact with the gears. After long-term work, the wear between the two is serious. Not only does it need to replace the wearing parts frequently, but it will also affect the sensitivity of the shifting mechanism.

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