Lawn mower using logarithmic spiral cam twisting handle with equal pressure angle to heighten wheel carrier

Abstract

The invention discloses a lawn mower using a logarithmic spiral cam twisting handle with an equal pressure angle to heighten a wheel carrier. The lawn mower adopts three wheels, and one wheel of a common four-wheel lawn mower is omitted, so that turning and reversing are more flexible. The lower part of the twisting handle (t5) is in radial through connection with the horizontal axis of a front wheel (t4) through a pin; the pin and the lower side edge of the twisting handle (t5) form an eccentric cam which is a lower side edge of one section of a logarithmic spiral with equal pressure angle everywhere, so that the horizontal axis (t4) of the front wheel is conveniently tensioned and released. The lawn mower has the advantage that gear can be shifted by tensioning and releasing without pulling out a wheel axle, i.e., a front single wheel carrier height-regulating slot is changed, so that the operation is simple, and turning and reversing are more flexible. The logarithmic spiral cam with equal pressure angle can be easily produced by a common intermediate-class bench worker; or a mold is processed out by use of a CNC machine tool, and then mass production is realized.

Description

technical field [0001] The invention relates to a lawn mower used for mowing lawns in gardens, parks, roads and other places. It uses three wheels and saves one wheel of a normal four-wheel mower, making turning and reversing more flexible. The lawn mower equipped with a logarithmic spiral cam twist handle with equal pressure angle to the height of the wheel frame is a series-excited motor electric lawn mower with a chassis anti-collision safety belt and a function wave disc brake, which is included in the lawn mower. An anti-collision safety device at the front of the chassis, and a brake with a function wave disc in the middle of the mower chassis, and a mowing head and a cord reel with a brake in the middle of the mower chassis Series motor electric lawn mower. Background technique [0002] Lawn mowers are widely used to mow grass in the manner chosen by people. When some pedestrians like and are used to using lawn mowers, they put a little more force on the rear upper ...

AI Technical Summary

Problems solved by technology

Anti-collision security and secure braking, mowing and mowing are optional, and there are wires and a large area. These are easier said than done, and they have always been a long-standing problem with electric lawn mowers.

[0007]Why use a cord reel? Because of the long wires scattered on the ground, when the electric lawn mower mows back and forth, sometimes it is accidentally stepped on by feet or crushed by wheels, which affects safety; If the wire is not long enough, mowing is suspended, or the wire is managed manually, which increases safety hazards

Why put a cord reel on an electric lawn mower? Anyone who has used an electric lawn mower knows that weeds often leak when mowing, and they have to be re-mowed. Especially when the environment is complex, such as bushes mixed with the lawn, it is necessary to take several steps forward and several times and repeat the mowing from left to right. Grass; if the reel is placed far away, the wires near the lawn mower cannot be pulled in and out synchronously with the pull and stop in time, or they will fall to the ground limply, and there is a danger of being stepped on or crushed by wheels, or they cannot be pulled in and out in time. Line in and out

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