JPS5851810A - Mower - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floating lawn mower with an improved cooling structure for a driving machine.

As shown in FIG. 3, in a conventional floating lawn mower, a cooling fan 53 is provided above the engine 51 in addition to a floating fan 52 disposed below the engine 51, and an opening below the engine 51 is provided. While air 56 for levitation was taken in from 55, cooling air 58 was taken in from an opening 57 above the engine 51 by the suction valve of the cooling fan 53 to cool the engine 51.

However, in order to reduce the power required for floating, a floating lawn mower is particularly required to be lightweight, and the increase in weight due to the installation of the cooling fan 53 is a major disadvantage. Moreover, the lawn mower as a whole becomes larger and the number of parts increases, leading to an increase in cost. Moreover, although the rotating sound of the floating fan 52 is generally louder than the operating sound of the engine 51, this rotating sound leaks to the outside through the opening 55 and generates a large amount of noise.

This invention was made in order to eliminate the above-mentioned conventional drawbacks, and by using the floating air sucked by the floating fan to cool the drive machine, it is possible to reduce the size of the floating lawn mower.
The purpose is to reduce weight, simplify the structure, and reduce noise.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, -C111 is a two-cycle engine which is a driving machine, and drives a floating fan 13 and a cutting blade 14 connected to the lower end of the rotating shaft 12.

The engine 11 is located opposite to the suction side, that is, the upper side, of the levitation fan 13, and furthermore, a coil starter 15 is disposed above the engine 11. 16
is a cover that has an opening 1'' 17 at the bottom and covers the flotation fan 13, the cutting blade grade 14, and the engine 11 from above and from the side; a first cover that covers the flotation fan 13 and the cutting blade blade 14; 16a and this first cover 1
6a with rivets 18 to cover the engine 11. The first cover 16
As shown in FIG. 2, a has a substantially rectangular planar shape, and a VC handshake 19 is attached to one end thereof.

The second cover 1611 in FIG.
0 is opened, and a guide plate 21 is attached to the inner surface of the second cover 16b. On the other hand, a communication port 22 is opened in a portion of the first cover 16 & located between the engine 11 and the levitation fan 13, and this communication port 22 and the guide plate 21 are connected within the cover 16. An air passage 23 is formed. However, the guide plate may be omitted.

In addition, 24 is a fuel tank, 25 is its cap, and 26 is a handle of the halogen coil starter 15.

In the above configuration, when the engine 11 is driven, the levitation fan 13 and the cutting blade 14 rotate, and the entire lawn mower floats due to the high pressure air 27 sent from the levitation fan 13. In this state, the cutting blade 14 Yoshi, ground 28
mow the lawn. At this time, air 29 is sucked from the air intake port 20 by the suction force of the levitation fan 13 and reaches the levitation fan 13 through the air passage 23. A certain cylinder part 11
a to cool this cylinder portion 11a. The engine 11 can be effectively cooled without using the cooling fan 53 as in the conventional example shown in FIG.

In addition, most of the loud rotation noise of the floating fan 13 enters the second cover 16b through the communication port 22, is reflected and absorbed by the engine 11 and the inner surface of the cover 16b, and is attenuated. Since it exits from the mouth 20, the noise is significantly reduced. It is also possible to attach sound absorbing material such as urethane to the air intake port.

As explained above, according to the present invention, since a cooling fan is not required, the weight of the lawn mower as a whole is reduced accordingly, so the power required for floating is small, and as a result, the drive machine can be downsized. , a synergistic effect of further weight reduction occurs, resulting in a significantly smaller and lighter floating lawn mower. Furthermore, the number of parts is reduced due to the absence of the cooling 7A, resulting in a simpler and more compact structure.

Additionally, the floating fan is silenced, reducing lawnmower noise.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a longitudinal sectional view showing a conventional example. 11... Engine (driver), lla... Heat generating part,
13... Floating fan, 14... Cutting blade, 16
...Cover, 17...Open n, 20...Air intake port, 21...Guide plate, 22...Communication port, 23...
Air passage, 29... air. Patent applicant: Kawasaki Heavy Industries, Ltd.

Claims (1)

[Claims] (1) A driver for driving the levitation fan and the cutting blade is disposed opposite to the air suction side of the levitation fan, and is opened downward to connect the levitation fan and the cutting blade to the driver. A cover is provided to cover the unit from above and from the sides, and an air intake port is provided in this cover.
A lawnmower having an air passage formed inside the cover so that air sucked from the air suction port by the suction force of the levitation fan passes through a heat generating part of the drive machine and then reaches the levitation fan.