Patent ID: 9227312
Filing Date: 2016-01-05
CPC Classification: B25D

Claim Text:
1. A light single-button multifunctional electric hammer, comprising a hammer body, a motor, a rotary bush assembly, a cylinder assembly, an operating mechanism and a knob; wherein the motor, rotary bush assembly, cylinder assembly and the operating mechanism are installed in the hammer body; the knob and a paddle shifter assembly are interlocked; the light single-button multifunctional electric hammer also comprises a bull gear and a transmission mechanism, the bull gear comprises a heel end teeth part and a toe end teeth part; the heel end teeth part has multiple teeth, the toe end teeth part has fewer teeth than the heel end teeth part, the transmission mechanism comprises a pinion, a gear clutch, a middle shaft, a hammering gear clutch, a swing rod bearing and a primary gear, the pinion and the middle shaft fit closely; the pinion is adapted to engage with the heel end teeth part of the bull gear and is engaged with an inner gear of the gear clutch; the gear clutch is adapted to fit with the toe end teeth part of the bull gear and is fitted with the middle shaft; the gear clutch and the hammering gear clutch are fitted with the middle shaft; the swing rod bearing is dynamically fitted with the middle shaft and is connected to the cylinder assembly through the swing rod; the hammering gear clutch and the swing rod bearing are provided with mating concave convex grooves, and the primary gear and the middle shaft fit closely; the knob is connected to the operating mechanism; the operating mechanism is adapted to fit with heel end teeth part of the bull gear, gear clutch and hammering gear clutch; wherein the operating mechanism comprises a stop plate spring, a stop plate, a drilling gear paddle shifter, a paddle shifter support, an inner knob, a hammering gear paddle shifter, a tension spring, a paddle shifter spring and a guide pillar; the stop plate spring, the stop plate, a first side of the drilling gear paddle shifter, a first side of the paddle shifter support, the hammering gear paddle shifter and the tension spring are serially installed on the guide pillar; the stop plate is provided with stop teeth to match the heel end teeth part of the bull gear and is positioned on one side of the inner knob; the other side of the drilling gear paddle shifter is snapped on the paddle shifter support; the tension spring is provided between the drilling gear paddle shifter and the paddle shifter support; the other side of the paddle shifter support is snapped on the hammering gear paddle shifter; a paddle shifter spring is provided between the paddle shifter support and the hammering gear paddle shifter; the paddle shifters of the drilling gear paddle shifter are provided correspondingly on each side of the gear clutch to clamp the gear clutch; a hammering gear fork of the hammering gear paddle shifter is provided correspondingly in the grooves of the hammering gear clutch.