Leaf blower with combined front air cylinder sound absorption and noise reduction and rear air cylinder multi-tube noise reduction

Abstract

A leaf blower with a combined front air barrel for noise absorbing and dampening and a rear air barrel for multi-tube dampening is characterized in that filter dampening air tubes 61 are arranged in parallel between the periphery of a motor, front divider cone 52 and divider cone 58a, and the rear air barrel 58, and a resistant muffler is formed; a plurality of noise-absorbing dampening air tubes 65 are arranged in the front air barrel to form a resistant muffler; noise-absorbing material is attached to the inner wall of a chamber of the rear air barrel, inner and outer walls of the front air barrel, and the outer wall of the filter dampening air tube, and porous noise-absorbing material is attached to the inner and outer walls of the noise-absorbing dampening air tubes 65; the inner wall of the front air barrel is provided with a plurality of barbs having a turned right-angled tip; noise-absorbing material 63 is attached by: dipping the parts, with attached noise-absorbing material, of the inner and outer walls of the front air barrel, outer walls of the filter dampening air tubes and inner and outer walls of the noise-absorbing dampening air tubes 65 in glue, extending into debris of noise-absorbing material, moving forward fast on a production line, and drying the parts, with the glue and debris of the noise-absorbing material, in hot blast. There are no previous thoughts of combining an air barrel and a muffler into one product; the leaf blower herein has noticeable effects.

Description

technical field [0001] The invention relates to a portable electric tool for blowing and sucking leaves in places such as flower beds, gardens, parks and roadsides, especially an improvement of a low-vibration leaf blowing and sucking machine, including the addition of a movable auxiliary handle and a dust bag holder And the improvement of the tie mouth, the dust outlet of the main body shell is added with a soft piece, the blowing impeller is added with a blade, the circuit is added with an insurance and a double switch, and the inside and outside of the blower and suction machine are equipped with sound-absorbing and vibration-reducing materials and honeycombs, and the rollers are changed to steerable. And on the basis of the low-vibration leaf blower with the safety door of equal logarithmic spiral at the pressure angle, the improved leaf blower with combined front air duct sound absorption and noise reduction and rear air duct multi-pipe noise reduction. Background techni...

AI Technical Summary

Problems solved by technology

The stator part of the outer rotor motor of the ordinary brushless motor that is usually used for blower or leaf blower is outside the motor. The stator is large and the lower slot of the stator winding is large, which does not meet the expectation of light weight and high output; especially its The rotor part with windings has to protrude a very long and thin motor output shaft, and the connection between the motor and the impeller fan can only be realized on the long extension line outside the axial direction of the motor, which causes a fatal problem Problem, the output shaft between the motor and the impeller fan forms a material mechanics cantilever beam structure, the length of the output shaft between the motor end and the center of the impeller fan is the moment arm, the radial centrifugal force on the impeller fan This force arm and the bias force form a large harmful bias moment, which consumes a large amount of motor output, unnecessarily increases the deflection of the shaft and the moment of inertia, and restricts the high-speed strength of the blower or leaf blower. out of the wind

Images