Portable leaf blower with brushless motor with stator and blades rotating but not rotor

Abstract

The essence of an updated product of a noise-reduction portable leaf blower with a brushless motor with a stator rotating together with blades and a non-rotating rotor is that a cantilever beam structure of material mechanics is replaced with a simple beam structure and a noise silencer is added to an fan drum, but people cannot think of the idea. A long and thin motor output shaft to protrude out of a rotor part is eliminated, and the connection between a motor and a leaf blower fan is not realized in the outer long extension line in the axial direction of the motor to solve a fatal long-standing problem; the output shaft between the motor and the leaf blower fan cannot form a long cantilever structure of material mechanics, and the center of the leaf blower fan is directly arranged at the section between bearings at both ends of the motor, so that a big harmful bias torque which is formed by using the protruding length of the output shaft as the arm of force and the radial centrifugal component force on the leaf blower fan as bias force is eliminated, without consumption of a large amount of motor output or increasing the deflection and moment of inertia of the shaft, so that the high-speed strong air exhaust of a blowing and soaking machine or the leaf blower is no longer limited, and the global difficult problem is solved. The concept disclosed by the invention serves as a modest spur to induce others to come forward with valuable contributions.

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 adding 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 a safety switch 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 the equal logarithmic spiral at the pressure angle, the improved portable leaf blower with the stator and the brushless motor in which the blades rotate and the rotor does not rotate. Background technique ...

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

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