GB2083733A - Casing for a lawn mower - Google Patents
Casing for a lawn mower Download PDFInfo
- Publication number
- GB2083733A GB2083733A GB8123065A GB8123065A GB2083733A GB 2083733 A GB2083733 A GB 2083733A GB 8123065 A GB8123065 A GB 8123065A GB 8123065 A GB8123065 A GB 8123065A GB 2083733 A GB2083733 A GB 2083733A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casing
- cover member
- aperture
- wall
- cooling air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/81—Casings; Housings
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D2101/00—Lawn-mowers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Harvester Elements (AREA)
Abstract
A plastics casing for a lawn mower, comprises a double walled hollow body, which walls include an upper wall and a well wall (3) for together at least partially covering and housing drive means (40) for a cutter blade (8), and a lower wall shaped to provide a cover for the cutter blade (8), a suction volute (14) for directing cut grass and a nozzle for ejecting cut grass. The casing (2) includes a cover member (5) for sealingly covering the upper end of the opening defined by the well wall (3). The lower wall has a cooling air intake aperture (12) and the upper wall has a cooling air outlet aperture (15). The apertures (12, 15) communicate with one another so that air is passed from outside the casing through the hollow body between the walls thereof and along the inside surface of the cover member (5) to the well wall aperture via the aperture (12), aperture (15) and cover member inside surface. The cover member (5) is also of double wall hollow form provided with cooling air orifices (7, 9) for communication with the apertures (12, 15). <IMAGE>
Description
SPECIFICATION Casing for a lawn mower
This invention relates to a plastics casing for a lawn
mower comprising a double walled hollow body, which walls include an upper wall and a well wall for together at least partially covering and housing drive
means for a cutter blade or blades, and a lower wall
shaped to provide a cover for the cutter blade or
blades, when the latter is or are present, a suction
volute for directing cut grass and a nozzle for
ejecting cut grass. The double-walled hollow body
may contain sound absorbing material between the
walls. Such a casing is described in our copending
Application No. 7923071 filed on 3rd July, 1979.
It is difficult to provide an electric lawn mower
with good insulation, particularly because such a
mower is sensitive to moisture. This is because
conventionally the air for cooling the electric motor
is circulated around the motor between an upper
cover member, which covers the motor, and a lower
part of the casing.
Thus, water splashing into the mower from out
side can pass into the motor. The conventional
method of cooling therefore makes it practically
impossible to use electric motors without sufficient
protection.
There is thus a need for a generally improved lawn
mower casing which reduces problems of insulation
which occur on simultaneous introduction of water
and cooling air in the casing.
According to the invention there is provided a
plastics casing for a lawn mower, comprising a
double walled hollow body, which walls include an
upper wall and a well wall for together at least
partially covering and housing drive means for a
cutter blade or blades, and a lower wall shaped to
provide a cover for the cutter blade or blades, when
the latter is or are present, a suction volute for
directing cut grass and a nozzle for ejecting cut
grass, wherein the casing includes a double walled
hollow cover member for sealingly covering the
upper end of the opening defined by the well wall,
which cover member has at least one air intake
orifice and at least one cooling air delivery orifice,
and wherein the lower wall has at least one cooling
air intake aperture and the upper wall has at least
one cooling air outlet aperture, the cooling air
orifices and apertures communicating with one
another so that cooling air can be passed from
outside the casing through the hollow body between
the walls thereof and along the inside surface of the
cover member, to the well wall aperture, via the
lower wall intake aperture, the upper wall outlet
aperture, the cover member intake orifice, the inside
surface of the cover member, and the cover member
delivery orifice.
Such a casing permits cooling air to be drawn into and discharged from the lawn mower below the
casing, in a region which is not subject to water
splashing.
It should be noted that the length of the cooling air
flow path substantially prevents water penetrating
into a motor for driving the cutting blade or blades, and into a housing for the motor.
For a better understanding of the present invention, and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which:
Figure lisa view of a casing of the invention in longitudinal vertical section, and
Figure 2 is a view of the casing of Figure 1 in vertical cross-section.
A plastics casing 2 of the invention shown in the drawings comprises a double walled hollow body provided with a well wall 3 defining an aperture. The well wall 3 forms a housing for drive means 4 which more particularly comprises an electric motor 40 above which is mounted a fan 41, while the shaft 42 of the motor drives a cutting blade 8.The well wall aperture 3 is sealingly covered by a cover member 5, which preferably is double walled, the lower wall 51 of which carries a peripheral seal 6 and is apertured with at least one air intake orifice 7 and a delivery orifice 9 which provides for a flow of cooling air along the inside surface of the cover member 5 towards the aperture defined by the well wall 3 in which it is channelled to outlets 10 which are provided on a carrier plate 11 for the motor 40, which carrier plate closes the bottom of the aperture in the well wall 3.
At least one cooling air intake aperture 12 is provided in the lower wall of the casing, near the location of the volute 14, and is closed by a screen member 13 to prevent pieces of cut grass from being sucked in. In operation a reduced pressure is created in the internal volume V of the casing, and the air escapes from the interior of the casing to the cover member 5 via at least one cooling air outlet aperture 15 provided in an upper wall of the casing 2.
This arrangement therefore provides for a free flow of cooling air between the casing walls through the apertures 12 and 15 and the orifices 7 and 9, as shown by the circuit illustrated by arrows in Figure 1.
It should be noted that a reduced pressure occurs in the interior of the casing, while an increased pressure occurs in the aperture in the well wall 3.
1. Aplasticscasingfora lawn mower,compris- ing a double walled hollow body, which walls include an upper wall and a well wall for together at least partially covering and housing drive means for a cutter blade or blades, and a lower wall, shaped to provide a cover for the cutter blade or blades, when the latter is or are present, a suction volute for directing cut grass and a nozzle for ejecting cut grass, wherein the casing includes a double walled hollow cover member for sealingly covering the upper end of the opening defined by the well wall, which cover member has at least one air intake orifice and at least one cooling air delivery orifice, and wherein the lower wall has at least one cooling air intake aperture and the upper wall has at least one cooling air outlet aperture, the cooling air orifices and apertures communicating with one another so that cooling air can be passed from outside the casing through the hollow body between
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (2)
1. Aplasticscasingfora lawn mower,compris- ing a double walled hollow body, which walls include an upper wall and a well wall for together at least partially covering and housing drive means for a cutter blade or blades, and a lower wall, shaped to provide a cover for the cutter blade or blades, when the latter is or are present, a suction volute for directing cut grass and a nozzle for ejecting cut grass, wherein the casing includes a double walled hollow cover member for sealingly covering the upper end of the opening defined by the well wall, which cover member has at least one air intake orifice and at least one cooling air delivery orifice, and wherein the lower wall has at least one cooling air intake aperture and the upper wall has at least one cooling air outlet aperture, the cooling air orifices and apertures communicating with one another so that cooling air can be passed from outside the casing through the hollow body between the walls thereof and along the inside surface of the cover member, to the well wall aperture, via the lower wall intake aperture, the upper wall outlet aperture, the cover member intake orifice, the inside surface of the cover member, and the cover member delivery orifice.
2. A plastics casing for a lawn mower, substantially as hereinbefore with reference to the accompanying drawings.
2. A casing according to claim 1, wherein the cover member has an inner wall which carries a periphery sealing means, which is provided with the air intake orifice for communication with the upper wall outlet aperture and which is provided with the delivery orifice for communication with the well wall aperture, air flowing, in operation of the casing, from the well wall aperture via air outlets provided on a carrier plateforthe drive means.
3. A plastics casing for a lawn mower, substantially as hereinbefore described with reference to the accompanying drawings.
New claims or amendments to claims filed on 18th
December 1981
Superseded claims 1 to 3
New or amended claims:
1. A plastics casing for a lawn mower, comprising a double walled hollow body, which walls include an upper wall and a well wall for together at least partially covering and housing drive means for a cutter blade or blades, and a lower wall, shaped to provide a cover for the cutter blade or blades, when the latter is or are present, a suction volute for directing cut grass and a nozzle for ejecting cut grass, wherein the casing includes a double walled hollow cover member for sealingly covering the upper end of the opening defined by the well wall by engagement between a peripheral sealing means, carried on an inner wall of the cover member, and the upper end of the well wall, which innerwall of the cover member has at least one air intake orifice and at least one cooling air delivery orifice, and wherein the lower wall has at least one cooling air intake aperture located at the level of the suction volute and the upper wall has at least one cooling air outlet aperture, the cooling air orifices and apertures communicating with one another so that cooling air can be passed from outside the casing through the hollow body between the walls thereof and along the inside surface of the cover member, to the well wall aperture, via the lower wall intake aperture, the upper wall outlet aperture, the cover member intake orifice, the inside surface of the cover member and the cover member delivery orifice, and from the well wall aperture via air outlets provided on a carrier plate for the drive means.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8020392A FR2490451A2 (en) | 1980-09-23 | 1980-09-23 | CARTER FOR LAWN MOWER |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2083733A true GB2083733A (en) | 1982-03-31 |
Family
ID=9246204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8123065A Withdrawn GB2083733A (en) | 1980-09-23 | 1981-07-27 | Casing for a lawn mower |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2490451A2 (en) |
GB (1) | GB2083733A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4510739A (en) * | 1982-07-23 | 1985-04-16 | Fichtel & Sachs Ag | Lawn mower |
US4601163A (en) * | 1984-04-10 | 1986-07-22 | Black & Decker Inc. | Garden tool |
FR2577105A1 (en) * | 1985-02-08 | 1986-08-14 | Honda Motor Co Ltd | MOTORIZED TURF MOWER |
US4711077A (en) * | 1984-11-30 | 1987-12-08 | Honda Giken Kogyo Kabushiki Kaisha | Cutter housing for power-driven lawn mower |
US5070686A (en) * | 1987-02-27 | 1991-12-10 | Yamaha Hatsudoki Kabushiki Kaisha | Vertical engine for walk behind lawn mower |
USD426836S (en) | 1997-04-03 | 2000-06-20 | Black & Decker Inc. | Mower shroud |
FR2828787A1 (en) * | 2001-08-22 | 2003-02-28 | Honda Motor Co Ltd | ELECTRIC LAWN MOWER |
US7062898B2 (en) * | 2004-06-22 | 2006-06-20 | Wec Company | Mower attachment mechanism |
CN1910980B (en) * | 2005-08-03 | 2011-01-19 | 罗伯特·博世有限公司 | Improvements of ground operation device |
EP2412219A1 (en) * | 2010-07-28 | 2012-02-01 | Deere & Company | Robotic mower housing and robotic mower |
US8191343B1 (en) * | 2009-06-26 | 2012-06-05 | Hydro-Gear Limited Partnership | Systems and methods for cooling a controller assembly |
EP2875713A1 (en) * | 2013-11-21 | 2015-05-27 | Robert Bosch Gmbh | Lawnmower |
US20150359174A1 (en) * | 2014-06-16 | 2015-12-17 | Kubota Corporation | Mower with motor cooling |
WO2020143758A1 (en) * | 2019-01-11 | 2020-07-16 | 南京德朔实业有限公司 | Riding lawn mower |
US20200383267A1 (en) * | 2017-12-22 | 2020-12-10 | Honda Motor Co., Ltd. | Mower |
CN114128481A (en) * | 2021-11-12 | 2022-03-04 | 华艺生态园林股份有限公司 | Synchronous chip storage mower |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9109131D0 (en) * | 1991-04-27 | 1991-06-12 | Black & Decker Inc | Lawn mower |
CN104620759B (en) * | 2013-11-07 | 2017-10-17 | 苏州宝时得电动工具有限公司 | Power-operated mower |
-
1980
- 1980-09-23 FR FR8020392A patent/FR2490451A2/en active Granted
-
1981
- 1981-07-27 GB GB8123065A patent/GB2083733A/en not_active Withdrawn
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4510739A (en) * | 1982-07-23 | 1985-04-16 | Fichtel & Sachs Ag | Lawn mower |
US4601163A (en) * | 1984-04-10 | 1986-07-22 | Black & Decker Inc. | Garden tool |
US4711077A (en) * | 1984-11-30 | 1987-12-08 | Honda Giken Kogyo Kabushiki Kaisha | Cutter housing for power-driven lawn mower |
FR2577105A1 (en) * | 1985-02-08 | 1986-08-14 | Honda Motor Co Ltd | MOTORIZED TURF MOWER |
US5070686A (en) * | 1987-02-27 | 1991-12-10 | Yamaha Hatsudoki Kabushiki Kaisha | Vertical engine for walk behind lawn mower |
USD426836S (en) | 1997-04-03 | 2000-06-20 | Black & Decker Inc. | Mower shroud |
FR2828787A1 (en) * | 2001-08-22 | 2003-02-28 | Honda Motor Co Ltd | ELECTRIC LAWN MOWER |
US7062898B2 (en) * | 2004-06-22 | 2006-06-20 | Wec Company | Mower attachment mechanism |
CN1910980B (en) * | 2005-08-03 | 2011-01-19 | 罗伯特·博世有限公司 | Improvements of ground operation device |
US8191343B1 (en) * | 2009-06-26 | 2012-06-05 | Hydro-Gear Limited Partnership | Systems and methods for cooling a controller assembly |
US9756788B1 (en) | 2009-06-26 | 2017-09-12 | Hydro-Gear Limited Partnership | Systems and methods for cooling a controller assembly |
EP2412219A1 (en) * | 2010-07-28 | 2012-02-01 | Deere & Company | Robotic mower housing and robotic mower |
US8336282B2 (en) * | 2010-07-28 | 2012-12-25 | Deere & Company | Robotic mower housing |
EP2875713A1 (en) * | 2013-11-21 | 2015-05-27 | Robert Bosch Gmbh | Lawnmower |
US20150359174A1 (en) * | 2014-06-16 | 2015-12-17 | Kubota Corporation | Mower with motor cooling |
US20200383267A1 (en) * | 2017-12-22 | 2020-12-10 | Honda Motor Co., Ltd. | Mower |
US11895947B2 (en) * | 2017-12-22 | 2024-02-13 | Honda Motor Co., Ltd. | Mower with motor cooling arrangement |
WO2020143758A1 (en) * | 2019-01-11 | 2020-07-16 | 南京德朔实业有限公司 | Riding lawn mower |
CN112996380A (en) * | 2019-01-11 | 2021-06-18 | 南京德朔实业有限公司 | Riding type mower |
CN112996380B (en) * | 2019-01-11 | 2023-03-17 | 南京泉峰科技有限公司 | Riding type mower |
CN114128481A (en) * | 2021-11-12 | 2022-03-04 | 华艺生态园林股份有限公司 | Synchronous chip storage mower |
Also Published As
Publication number | Publication date |
---|---|
FR2490451B2 (en) | 1983-10-21 |
FR2490451A2 (en) | 1982-03-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |