Backpack motor-driven sprayer with rope-pull falling-back starting function

Abstract

The invention discloses a backpack motor-driven sprayer with a rope-pull falling-back starting function. The sprayer comprises a rack, a fan, a gasoline machine, an oil tank, a medicine box, a starter and the like; the starter comprises a starting shaft, a ratchet clutch piece, a spring seat, a starting plate, a restoration spring, a pulling rope and an outer shell, wherein one end of the shaft is a single-way ratchet wheel, and the other end is a round shaft; the ratchet clutch piece is installed on a gasoline rotor S; the spring seat and the starting plate are installed on the starting shaft; the surface of the spring seat is provided with a boss; the restoration spring is installed between the spring seat and the starting plate; the inner end of the restoration spring is connected withthe starting plate, and the outer end of the restoration spring is connected with the spring seat; the pulling rope is wound on the starting plate; one end of the pulling rope is connected with the starting plate, and the other end of the pulling rope is connected with a starting handle; the outer shell is sleeved on the starting plate; the inner side wall of the outer shell is provided with a groove which is matched with the boss; and the center of the bottom part of the outer shell is provided with a shaft sleeve which is slidingly matched. Two ends of the starting shaft of the sprayer are placed in the axial hole of the spring seat and the shaft sleeve on the outer shell, when one end of the starting shaft is pulled by the pulling rope, the starting shaft is not subjected to radial central deviation, the pulling rope can be taken back in time, and the starting is safe and reliable.

Description

technical field [0001] The invention relates to a starting device for a small gasoline engine, in particular to a knapsack motorized sprayer with the function of pulling back and starting with a rope. Background technique [0002] The knapsack motorized sprayer in agricultural and forestry mechanized pest control operations is widely used for spraying pesticides, and it usually includes: frame, blower fan, gasoline engine, fuel tank, medicine box, control parts, spraying parts, starter. The machine needs to be started with a starter when spraying pesticides. For example, the 1E40F gasoline engine is used for knapsack motorized spray dusters on the market. Its starting device includes a starting plate and a pull rope connected to the gasoline engine rotor. The rope is wound on the starter wheel, and the stay rope wound on the starter wheel is pulled to drive the above-mentioned gasoline engine rotor to rotate. For example, the Chinese patented technology "Falling Rope Starte...

AI Technical Summary

Problems solved by technology

[0005] However, the starting disk and the spring seat of the above-mentioned sprayer starter are successively installed on the starting shaft, and the shaft diameter at one end of the starting shaft is placed in the shaft hole of the spring seat, and the other end is suspended in the air. , the rigidity of the nylon material is poor. In addition, the starting connection parts of the starter are affected by factors such as temperature and pressure during the processing process, and there are certain errors in the geometric dimensions, and there are differences in the fit clearance between the parts.

The above difference will cause a distance between the spring seat and the starter plate. When the pull rope pulls the starter plate to start, because the end of the starter plate installed on the starter shaft is in a suspended state, the tension of the pull rope at this end will produce a radial center deviation. , which in turn will cause the distance between the spring seat mounted on the starting shaft and the starting plate to become larger due to the force in the opposite direction pulled out by the starting rope. The disk is stuck and cannot rotate freely, resulting in the starter's starter rope not being retracted into the casing in time, resulting in failure to restart the motorized sprayer

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