Portable mowing machine based on movable bottom plate

Abstract

The invention discloses a portable mowing machine based on a movable bottom plate. The portable mowing machine based on the movable bottom plate comprises a handrail rack, an engine, a clutch, a shaft sleeve, a transmission shaft and a cutter, wherein the clutch is a centrifugal clutch; the transmission shaft consists of a transmission shaft I and a transmission shaft II, and the two ends of the transmission shaft I are respectively connected with a driven cup of the centrifugal clutch and a driving conical gear arranged in a gearbox; a driven conical gear which is fixedly connected onto the transmission shaft II which is fixedly arranged in the gearbox through a bearing is engaged with the driving conical gear on the transmission shaft I; a sun gear, an inner gear ring and a knife rest circular disc are sequentially and fixedly connected onto the transmission shaft II which stretches out of the gearbox; planet gear shafts are uniformly distributed on the bottom end of the gearbox along the circumferential direction, the ends of the planet gear shafts stretch out of the gearbox, and planet gears which are respectively and fixedly connected onto the planet gear shafts are engaged with the sun gear and the inner gear ring; a pair of upper blades on the outer edge of the inner gear ring are movably fit with a pair of lower blades on the outer edge of the knife rest circular disc; the bottom end of the transmission shaft II is connected with a circular disc bottom plate through an external spherical surface ball bearing.

Description

Technical field [0001] The invention relates to a lawn mower, in particular to a portable lawn mower based on a movable bottom plate and a double disc structure. Background technique [0002] At present, portable lawn mowers mainly come in the following forms: a nylon rope is fixed on a high-speed rotating disc, and the inertial force of the rotating nylon rope is used to realize mowing; a blade is fixed on a high-speed rotating disc, which is a single disc structure ; There are also ways of using circular saw blades. From the perspective of cutting principle, the above types are all single disc structures, which belong to unsupported cutting, which mainly rely on the high-speed rotation of the blade to achieve cutting, because the blade must ensure a linear speed of 20-40m / s to achieve effective cutting. Therefore, the above-mentioned lawn mowers generally use a two-stroke gasoline engine with a rated power of about 1kw and a rated speed of 8000-10000rpm as power, which brings ...

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Problems solved by technology

Therefore, the above-mentioned lawn mowers generally use a two-stroke gasoline engine with a rated power of about 1kw and a rated speed of 8000-10000rpm as power, which brings about relatively large noise and vibration problems.

From the point of view of operation methods, portable lawn mowers mainly have two modes of operation: hand-held and back-mounted. Hand-held, because the engine is not in contact with the human body, the human body is less sensitive to the vibration and noise of the engine, but the rotating blade must be suspended in the air during work. , the weight of the machine is all supported by the human arm, and the labor intensity is high; the backpack structure is adopted, although the hand-held weight is reduced, the heavier engine in the machine is carried by the human body, and the flexible shaft is used to transmit power, but the noise and vibration of the engine It will be directly transmitted to the human body, and the comfort of use will be reduced. Some people also consider adding walking wheels to the lawn mower, but the structure is more complicated, there are many parts, it is easy to block the grass, and the ground clearance is too high, and the low weeds cannot be cleaned. clean, and because the rotation plane of the blade cannot be deflected, weeds may not be cleared when weeds are cleaned in low recesses, or the stubble is too high, and the work quality is not good; when weeds in high convex places are cleaned, the blade may touch Ground, affect the quality of mowing and even damage the blade

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