CS199363B1 - Cover for electromotive drived mowers - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a housing for electro-motorized lawn mowers using a plastic hatch covering an engine having air inlet and outlet openings to cover a drive motor in a manner corresponding to protection class II and with improved air cooling.

In the case of electro-motorized lawn mowers, it is necessary that the parts with simple insulation are covered with a plastic hatch. In addition to the electrical insulation, this overlap also constitutes thermal insulation which causes an increased heating of the drive motor.

Electric motors are generally equipped with a fan to improve engine cooling. The cooling air required for this must be led through the plastic hatch.

So far «mA” * lawn mower covers use two principal solutions for this purpose. In a first embodiment, holes are provided above the engine in the form of a shape

Even the overlapping etiquics against the rain partly closed again.

In another embodiment, recesses for air inlet are arranged in the mountaineer half of the overlapping hatch.

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Both solutions have the common drawback that, as before, sprayed water can enter the drive motor. This reduces the degree of protection due to the electrical insulating capability and reduces the size of the recesses required for sufficient heat dissipation.

The purpose of the invention is to increase the degree of protection of electro-motorized lawn mowers and to prevent heat build-up in the engine hood.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved lawn mower housing of the aforementioned type by means of a rearrangement of the hatch and air slots disposed therein.

This object is achieved according to the invention in that the cooling air inlet and outlet openings are arranged opposite each other in the lower part of the hatch, a guiding plate is arranged opposite the cooling air inlet inside the hatch, the upper part of the engine is surrounded by an air guide flap and bridges on sides ·

By means of a non-coaxial, eccentric hatch arrangement relative to the engine, an air guide plate at the cooling air inlet, a ventilation flap and bridges mounted on the longitudinal sides of the engines, a directed flow of the smoothing air is achieved which is guided directly by the engine. the hatch is then led upwards, flows through the engine and exits on the other side again ·

The invention achieves very good heat dissipation and increases the degree of protection and / or electrical insulation. · The proposed solution can be realized β at relatively low economic costs.

The invention is explained in more detail below by way of example.

Fig. 1 is a cross-sectional side view;

The hatch 1 is mounted eccentrically with respect to the motor 4, and a guide plate 4 is provided at the cooling air inlet 2 in the form of a recess in the lower third of the hatch. The air stream 6 entering the inlet 2 is guided upwardly through the guide plate 4 and pressed downwards by the fan on the motor surface. By means of the bridges 5, the guide flap 5, the air as well as the guiding skin 5, a directed air flow is achieved. which protrudes on the opposite side through output £ ·

Claims (1)

SUBJECT OF THE INVENTION Housing for electro-motorized lawn mowers using a plao-hood cover, covering the engine, having air inlet and outlet openings, characterized in that the cooling air inlet and outlet openings (7) are aligned opposite each other in the lower a cover plate (3) is arranged against the cooling air inlet (7) inside the cover (1), the upper part of the engine (2) is surrounded by an air guide flap (5) and the motor (2) is on its longitudinal sides provided with bridges (6).