Lawn ventilator

Abstract

The invention discloses a lawn ventilator which comprises an enclosure, a motor, a soil loosening tool and a walking mechanism. The walking mechanism is arranged on the enclosure; a hand rail is arranged on the enclosure; an operation switch is arranged on the upper portion of the hand rail; the technical scheme includes that the soil loosening tool includes a rotating shaft rotatably arranged onthe enclosure and blades movably arranged on the rotating shaft. The motor shaft of the motor is in direct transmission connection with the rotating shaft of the soil loosening tool to drive the rotating shaft of the soil loosening tool to rotate to enable the blades on the rotating shaft to be swung out under the action of centrifugal force to conduct lawn loosening and aeration.

Description

technical field [0001] The invention relates to the technical field of garden tools, in particular to a grass aerator for improving the air permeability of grass. Background technique [0002] Grass aerator (also called scarifier) ​​is used to loosen the soil, remove humus such as dead leaves on the soil surface, improve the air permeability of the grass, so that the surface vegetation can shine on the sun and grow better. The current grass aerators are basically composed of motors, gear reduction boxes (or belt and pulley transmission boxes), traveling mechanisms, loose soil cutters, depth adjustment mechanisms and other components, of which the motors are AC motors and DC motors. , the speed of the motor is mostly between 16,000 rpm and 18,000 rpm. As we all know, under the premise of a certain power, the speed and torque are inversely proportional, that is to say, the higher the speed, the smaller the torque; the lower the speed, the stronger the torque. Therefore, all ...

AI Technical Summary

Problems solved by technology

For AC motors, due to the reduction in speed, the size and weight of the motor will inevitably increase, and the increase in volume and weight of the AC motor will be far greater than the volume and weight of the canceled gear reduction box or belt and pulley transmission box. , so those skilled in the art know clearly that this solution is not feasible

For the DC motor, the rotating speed can be reduced to 3000 rpm to 3500 rpm, and still remain within an acceptable volume and weight range, but those skilled in the art also know clearly that the current grass aeration machine The blade of the soil loosening tool assembly is fixed on the rotating shaft. During the working process, when the blade rotates and encounters hard objects such as stones and branches on the grass, it will produce a huge impact. At this time, it will act on the rotating shaft to On the motor, a large current impact will be generated in the circuit, and the motor or power supply will immediately start self-protection and stop working, which will eventually cause the grass aerator to basically fail to work (stop often), so technical personnel in the field have not yet Elimination of the gear reduction box or the belt and pulley transmission box, it is considered impossible to directly drive the work of the scarifier by the DC motor

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