Internal-combustion engines – Cooling – Devices for cooling liquid by air flow
Reexamination Certificate
2000-06-16
2001-10-23
Wolfe, Willis R. (Department: 3747)
Internal-combustion engines
Cooling
Devices for cooling liquid by air flow
C123S041120, C123S041110
Reexamination Certificate
active
06305333
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an air blower apparatus, and more particularly to an air blower apparatus that takes up less space.
2. Description of the Related Art
FIG. 8
shows the structure of an air blower apparatus
20
powered by a hydraulic motor
23
.
As shown in
FIG. 8
, a duct
15
is provided in an engine chamber, not shown. A shroud
28
is connected to the duct
15
. The body portion
21
of the air blower apparatus
20
is fixed to the inner walls of the shroud
28
.
A rotary shaft
39
is provided on the body portion
21
of the air blower apparatus
20
. The hydraulic motor
23
is mounted on the body portion
21
of the air blower apparatus
20
so as to connect with the rotary shaft
39
. Meanwhile, a fan boss
41
′ is provided on the rotational center portion of a fan
29
. The fan boss
41
′ is mounted on the rotary shaft
39
of the body portion
21
of the air blower apparatus
20
. As a result, the fan
29
is contained within the shroud
28
. The air blower apparatus
20
is constituted as above.
With the air blower apparatus
20
shown in
FIG. 8
, when the hydraulic motor
23
runs, the rotary shaft
29
rotates and thereby the fan
29
rotates. When the fan
29
rotates, devices, not shown, disposed within the engine chamber are blasted with air via the duct
15
and thus cooled.
The air blower apparatus
20
in
FIG. 8
is provided within the engine chamber. Meanwhile, in addition to the air blower apparatus
20
, various devices such as a radiator, engine, and hydraulic pump driven by the engine are also provided within the engine chamber. Consequently, space for the air lower apparatus
20
is limited within the engine chamber.
For this reason, there is a demand for an air blower apparatus that occupies as little space as possible. In other words, there is a demand for reducing the width of the air blower apparatus
20
in the direction of the rotary shaft
39
.
SUMMARY OF THE INVENTION
It is an object of the present invention to reduce the space required by air blower apparatus by reducing the width of the air blower apparatus in the direction of its rotary shaft.
In order to achieve the abovementioned object, the first invention of the present invention is an air blower apparatus comprising a hydraulic motor and a body portion provided with a rotary shaft, the hydraulic motor being mounted on the rotary shaft, the rotary shaft on which the hydraulic motor is mounted being mounted on a fan, whereby the fan is rotated by driving the hydraulic motor, wherein the fan and the body portion of the air blower apparatus are disposed so as to partially overlap each other in the direction of the rotary shaft, making width of the air blower apparatus in the direction of the rotary shaft less than total of width of the body portion of the air blower apparatus in the direction of the rotary shaft and width of the fan in the direction of the rotary shaft.
The first invention is explained with reference to FIG.
2
.
With the first invention, the fan
29
and body portion
21
of the air blower apparatus
20
are disposed so as to partially overlap in the direction of the rotary shaft. The width of the air blower apparatus
20
in the direction of the rotary shaft is therefore less than the total of the width of the body portion
21
of the air blower apparatus
20
in the direction of the rotary shaft and the width W of the fan
29
in the direction of the rotary shaft.
With the first invention, the width of the air blower apparatus
20
in the direction of the rotary shaft becomes small and the space occupied by the air blower apparatus
20
can be made small, because the fan
29
and body portion
21
of the air blower apparatus
20
are disposed so as to partially overlap in the direction of the rotary shaft.
In order to achieve the abovementioned object, the second invention of the present invention is an air blower apparatus comprising a hydraulic motor and a body portion provided with a rotary shaft, the hydraulic motor being mounted on a rotary shaft of the body portion, the rotary shaft of the body portion which the hydraulic motor is mounted on being mounted on a fan, and the fan being rotated by driving the hydraulic motor, wherein a rotational center portion of the fan is formed with a recess; and a substantially central portion of the body portion of the air blower apparatus is formed into a projection to be housed in the recess, and the rotary shaft of the body portion of the air blower apparatus is mounted on the fan by housing the projection of the body portion of the air blower apparatus in the recess of the fan.
The second invention is explained with reference to FIG.
2
.
With the second invention, the fan boss
41
in the rotational center portion of the fan
29
is formed to have a recess. Meanwhile, the substantially central part, that is, a boss
38
, of the body portion
21
of the air blower apparatus
20
is formed to have a projection that is housed in the recessed fan boss
41
. The projecting boss
38
of the body portion
21
of the air blower apparatus
20
is housed within the recessed fan boss
41
in the rotational center portion of the fan
29
and thereby the rotary shaft
39
of the body portion
21
of the air blower apparatus
20
is mounted on the fan
29
. The air blower apparatus
20
is constituted in this way.
With the second invention, the width of the air blower apparatus
20
in the direction of the rotary shaft
39
can be reduced because the boss
38
of the body portion
21
of the air blower apparatus
20
is contained within the fan boss
41
of the fan
29
. The space occupied by the air blower apparatus
20
can be made small because of the small width of the air blower apparatus
20
in the direction of the rotary shaft.
For the third invention, in the air blowing apparatus according to the second invention, the abovementioned hydraulic motor is mounted substantially in the central part of the body portion of the air blower apparatus.
The third invention is explained with reference to FIG.
2
.
With the third invention, the hydraulic motor
23
is mounted substantially in the central part of the body portion
21
of the air blower apparatus
20
.
Consequently, with the third invention, all or part of the body portion
21
of the air blower apparatus
20
, wherein the hydraulic motor
23
is mounted, is contained within the fan boss
41
of the fan
29
. As a result, the width of the air blower apparatus
20
in the direction of the rotary shaft
39
can be made small. Because the width of the air blower apparatus
20
in the direction of the rotary shaft becomes small, the space occupied by the air blower apparatus
20
also can be made small.
For the fourth invention, in the air blowing apparatus according to the second invention, the abovementioned hydraulic motor is mounted on the body portion of the air blower apparatus, so as to lie substantially within the total width of the body portion of the air blower apparatus in the direction of the rotary shaft and the width of the abovementioned fan in the direction of the rotary shaft, when the rotary shaft of the body portion of the air blower apparatus is mounted on the abovementioned fan.
The fourth invention is explained with reference to FIG.
2
.
With the fourth invention, the hydraulic motor
23
is mounted on the body portion
21
of the air blower apparatus
20
, so as to lie substantially within the total width of the width of the body portion
21
of the air blower apparatus
20
in the direction of the rotary shaft and the width W of the fan
29
in the direction of the rotary shaft, when the rotary shaft
39
of the body portion
21
of the air blower apparatus
20
is mounted on the fan
29
.
With the fourth invention, the necessary space can be further reduced because the hydraulic motor
23
is mounted on the body portion
21
of the air blower apparatus
20
so as to lie substantially within the same.
For the fifth invention, in the air blowing apparatus according to the sec
Endo Hiroshi
Maruta Kazuhiro
Yoshida Nobumi
Benton Jason
Kananen Ronald P.
Komatsu Ltd.
Rader Fishman & Grauer
Wolfe Willis R.
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