JP2551727Y2 - Lawn mower motor cooling system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor cooling device for a lawn mower, and more particularly to a motor cooling device for a lawn mower that prevents cut grass dust from entering a motor storage room without using a grass dust removal filter. Related to the device.

[0002]

2. Description of the Related Art FIGS. 4 (A), 4 (B), and 4 (C) show a sectional side view of a conventional lawn mower and a passage of hot air generated by a motor.

A first conventional example (for example, Japanese Utility Model Publication No. 61-34976) As shown in FIGS. 4A and 4B, a substantially central portion of a lawn mower main body 61 having a convex shape of a lawn mower 60 is provided. A rotary reel blade R is provided in which a plurality of spiral blade edges form a cylindrical surface. At the rear of the play machine body 61, a partition wall 6 is provided.
Provided motor storing room MR ₁ partitioned by 7, the motor storing room MR _1, the motor M for rotating the rotating reel blades R counterclockwise direction via the belt 62 is stored. The output shaft of the motor M small pulley P ₁ is fixed to the rotary reel blade R is fixed a large pulley P _2, is between pulleys P _1, P ₂ the belt 62 is stretched. A discharge port 63 is formed on the right side of the protruding portion of the lawn mower main body 61 to discharge cut grass swarf to the outside. The right bottom surface of the mower body 61, ventilation windows 66 are provided for discharging the heat generation of the motor M, the filter F ₁ to prevent mixing of Hitoshi Shibakusa is attached to the ventilation windows 66. A front wheel 64 and a rear wheel 65 are rotatably mounted before and after the lawn mower main body 61 in the traveling direction.

[0004] axial fan 68 is attached to the output shaft of the motor M is to discharge the heat generated by the motor M mainly from the front side of the mower body 61 to the code X ₁ direction, a portion of the heat generation through the air windows 66 It is discharged to the code X ₂ direction Te.

In the lawn mower 60 having such a configuration, the cut lawn waste is sent in the direction of arrow K ₁ ,
Is discharged to the outside. Second Conventional Example As shown in FIG. 4C, a discharge port 71 for discharging turf dust is provided on the right side of the convex portion of the convex lawn mower main body 61A of the lawn mower 70.
Are formed. The protrusion upper motor storing room MR ₂ is formed by the partition walls 72, the motor M is stored. The partition wall 72 air window 73 is formed, the filter F ₂ is attached to the ventilation windows 73.

[0006] In the lawn mower 70 of the above configuration, cut Shibakuzu is sent in the direction of arrow K _2, the discharge port 71
Is discharged to the outside.

[0007]

[Problems to be solved by the present invention]
In both of the conventional examples, filters F ₁ and F ₂ are provided to prevent turf dust and the like from entering the motor housing. These filters F ₁ and F ₂ are clogged by turfgrass and the like, so it is necessary to remove turf debris and the like after using the lawn mower, which is a troublesome operation for the user. Also, if the filter can be eliminated, it contributes to the cost reduction of the lawn mower.

Accordingly, an object of the present invention is to provide a motor cooling device for a lawn mower which prevents turfgrass or the like from entering a motor storage room without using a filter.

[0009]

According to the present invention, a motor M for rotating a rotary reel blade R through a transmission drive means and a wind window 1d for discharging heat generated by the motor M to the outside are provided to solve the above-mentioned problems. , 1e, a motor storing room MR ₃ having a 1f, the motor cooling device of lawn mower and a air passage 4 to discharge the blade wind generated by the rotation of the rotary reel blade R outside, the motor storing room MR A ventilation passage 4 for blade-like air is formed along at least a part of the _third partition wall 1 , and wind windows 1 d, 1 e, 1 are formed in the partition wall 1 along the ventilation passage 4.
f is formed, and the wind windows 1d, 1e, 1f are formed along the blade wind direction.
Thus, the cut-and-raised portions 1a, 1b and 1c are provided .

[0010]

According to the present invention, a wind window is formed in the partition wall of the motor housing, and when the blade wind passes through the ventilation path, a pressure difference is generated at the opening of the wind window by the wind window. Due to this pressure difference, the heated air in the motor storage room is drawn into the ventilation path side, and the heated air is discharged to the outside of the lawn mower together with the turf dust.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. 1A, 1B, and 1C are a side view, a bottom view, and a rear view of a lawn mower S to which the present invention is applied. In FIGS. 4A, 4B, and 4C, the same reference numerals are given to the already described portions, and redundant description is omitted.

As shown in FIGS. 1A, 1B, and 1C, the lawn mower S includes a lawn mower main body 10, a first handle 20 having a U-shape (not shown), and a 1 handle 20
And a second handle 30 having a handle portion 22 and having a T-shape as a whole. The first handle 20 and the second handle 30 can be folded and stored as shown by rotating one knob 40 attached to the joint 21. When the lawnmower S is used for mowing the lawn, the first handle 20 and the second handle 30 are extended in a direction shown by a two-dot chain line.

[0013] the central portion of the mower body 10 is the partition wall 1 is provided, on the upper side of the partition wall 1 are formed motor storing room MR _3, the motor M in the motor storing room MR ₃ is Is stored. An opening 2 for discharging cut grass swarf to the outside is formed on the right side surface of the protrusion of the lawn mower main body 10. A dust collecting basket (not shown) is attached to the right side of the opening 2. At the center of the bottom surface of the lawn mower main body 10, a fixed receiving blade 3 for cutting grass in cooperation with the rotary reel blade R is provided. A ventilation path 4 is formed from the right side of the rotating reel blade R toward the opening 2, which is a passage for blade wind generated by rotation of the rotating reel blade R. A lever 5 for adjusting the height of the front wheel 64 is disposed on the front upper surface of the lawn mower main body 10, and the height of the cut grass is adjusted by adjusting the lever 5.

Next, a detailed configuration of the partition wall 1 and the ventilation path 4 will be described with reference to FIGS. 2 (A) and 2 (B). FIG.
As shown in (A) and (B), rectangular cut-and-raised portions 1a, 1b, and 1c, which are negative pressure forming means, and wind windows 1d, 1e, and 1f through which hot air passes are formed on the partition wall 1. I have. The cut and raised is Shibakuzu is extended obliquely along the exhaust air direction that turning motor storing room MR _3.

Next, the operation will be described. First, as shown in FIGS. 1 (A) and 2 (A), the knob 40 is loosened to extend the first handle 20 and the second handle 30 in the direction indicated by the two-dot chain line, and the knob 40 is tightened again, and the lawn mower is tightened. S is set in a lawn mowing enabled state, and the lever 5 is adjusted to set the height of the cut grass. In this state, the power switch (not shown) is turned on to rotate the motor M, thereby rotating the rotary reel blade R counterclockwise to start lawn mowing. Turf is cut by the rotating reel blade R and the fixed receiving blade 3. Cut Shibakuzu is blown in the direction indicated the air passage 4 by the reference numeral K ₃ by blade wind W _R generated by the rotation of the rotating reel blades R, is discharged from the discharge port 2 to the outside.

[0016] When the blade wind W _R passes through the air passage 4, the blade wind W _R, air windows 1d, 1e, portions of the 1f becomes negative pressure. Therefore, the hot air W _M generated by the rotation of the motor _M
Since the more the pressure of the negative pressure is lowered, the hot air W _M is frame drag to air passage 4 side, the outside together with the blade wind W _R (e.g.,
Dust collection basket).

When the present invention is applied to the first conventional example (see FIG. 4A), as shown in FIG.
What is necessary is just to cut and raise 7A, to provide 1A, and to form the wind window 1B.

[0018]

According to the present invention as described above, according to the invention], mode
Blade ventilation along at least part of the partition wall of the
An air passage was formed, and a wind window was formed on the partition wall along the ventilation passage.
From the heat generated by the rotation of the motor
Motor can be cooled quickly because it can be discharged outside
The efficiency can be increased, and the wind window
Turf in the wind
Debris can be prevented from entering the motor compartment
You.

[Brief description of the drawings]

1A, 1B, and 1C are a side sectional view, a bottom view, and a rear view of a lawn mower to which the present invention is applied;

FIGS. 2A and 2B are a side sectional view and a perspective view of a wind window which is a main part of the present invention.

FIG. 3 is a side sectional view showing another embodiment.

FIGS. 4A, 4B, and 4C are a side sectional view showing an example of a conventional lawn mower and a view showing a passage of hot air generated by a motor.

[Explanation of symbols]

1 ... partition walls 1a, 1b, 1c ... cut and raised 1d, 1e, 1f ... ventilation windows 2 ... opening 4 ... air passage 10 ... lawn mower body 62 ... belt (transmission drive means) MR ₃ ... motor storing room M ... motor P ₁ , P ₂ ... pulley R ... rotating reel blade

Claims (1)

(57) [Scope of request for utility model registration] 1. A motor for rotating a rotary reel blade via a transmission drive means, a motor storage chamber having a wind window for discharging heat generated by the motor to the outside, and a blade wind generated by rotation of the rotary reel blade. A motor cooling device for a lawn mower provided with a ventilation path for discharging to the outside, wherein a ventilation path for blade wind is formed along at least a part of a partition wall of the motor storage chamber, and the ventilation path is A wind window is formed in a partition wall along the wind window, and the wind window is provided with a cut-and-raised extending obliquely along the blade wind direction.
Motor cooling device of the mower, characterized in that provided.