CN109952020A - Low profile mower blade - Google Patents
Low profile mower blade Download PDFInfo
- Publication number
- CN109952020A CN109952020A CN201780070700.XA CN201780070700A CN109952020A CN 109952020 A CN109952020 A CN 109952020A CN 201780070700 A CN201780070700 A CN 201780070700A CN 109952020 A CN109952020 A CN 109952020A
- Authority
- CN
- China
- Prior art keywords
- bending part
- elongate blades
- blade
- elongate
- mower blade
- 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.)
- Pending
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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
- A01D34/73—Cutting apparatus
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Harvester Elements (AREA)
Abstract
A kind of mower blade (20) for lawn care apparatus, including elongate blades (24), the elongate blades (24) have opposite end edge (26,28) and opposite side margins (30,34).The elongate blades (20) are adapted to mount on rotary mower, to be rotated around the central axis (36) extended along the direction for crossing the elongate blades (24), and the elongate blades (24) are divided into the opposite elongate end (38,40) extended from the central axis (36).The elongate blades (20) have blade main shaft (44), and limit bending part (54) and make the bending part (54) and sharp cutting edge (46) opposite.The bending part (54) extends from elongate blades (20) along upward direction, and two components meet and are bent towards the lower surface of the elongate blades (20) (56).The further embodiment of the mower blade (20) includes the bending part (54) in vertical direction from sharp cutting edge (46) offset to generate lift during rotation, and the bending part (54) have constant cross section on most blade main shaft (44).
Description
Cross reference to related applications
The US provisional patent Shen of entitled " the low profile mower blade " submitted this application claims on September 20th, 2016
Please sequence number 62/397,177 and on September 21st, 2016 entitled " cutting tips " submitted U.S. Design Pat application sequence
The full content of the priority of row number 29/578,374, this two applications is incorporated by reference the application.
Background technique
1. technical field of the invention
The present invention relates to lawns and garden equipment, more particularly, to the low profile blade of grass trimmer.
2. the description of related background art
The grass trimmer (such as hand-push type mower, riding type grass trimmer, garden tractors etc.) being currently known all includes tool
There is the cutting plate of at least one cutting blade, the cutting blade is configured to cutting grass and other vegetation.When using with pack
When the cutting blade of attachment, the blade generally includes inclined surface, for generating lifting force below cutting plate so that grass
It stands, and air-flow is provided and moves grass cuttings in the pack attachment, for example U.S. Patent number 6, cutter shown in 301,868
Piece.However, the cutting can be corroded using such cutting blade in the case where operation on the soil comprising higher gravel content
The inclined surface part of blade.Over time, become, the inclined surface may be abraded away totally, to lose the knife
The enhanced feature of piece.This may need relatively frequently more allowing blade replacement.
Therefore, it is necessary to a kind of with the low mower blade for promoting air-flow, so that it provides some air-flows, while reduce sand
Son hits abrasion caused by blade.
Summary of the invention
According to an aspect of the present invention, a kind of mower blade for lawn care apparatus includes elongate blades, institute
Elongate blades are stated with opposite end edge and opposite side margins.The elongate blades are adapted to mount to rotary mowing
On machine, to rotate around the central axis extended along the direction for crossing elongate blades, the central axis divides elongate blades
At opposite elongate end, the elongate end extends from the central axis.The elongate blades have blade main shaft.Institute
Stating elongate blades restriction bending part makes the bending part opposite with cutting edge.The bending part is from the elongate blades
Extend along upward direction, two components meet and are bent towards the lower surface of the elongate blades.
According to another aspect of the present invention, a kind of mower blade for lawn care apparatus includes elongate blades, institute
Elongate blades are stated with opposite end edge and opposite side margins.The elongate blades are adapted to mount to rotary mowing
On machine, to rotate around the central axis extended along the direction for crossing elongate blades, the central axis divides elongate blades
At opposite elongate end, the elongate end extends from the central axis.Elongate blades have blade main shaft.It is described thin
Long blade limits bending part and makes the bending part opposite with cutting edge.The bending part from the elongate blades along
Upward direction extends, and two components meet and are bent towards the lower surface of the elongate blades.The distal portion of the bending part
Divide and deviated in vertical direction from cutting edge, to generate lift during rotation.
According to another aspect of the invention, a kind of mower blade for lawn care apparatus includes elongate blades, institute
Elongate blades are stated with opposite end edge and opposite side margins.The elongate blades are adapted to mount to rotary mowing
On machine, to rotate around the central axis extended along the direction for crossing elongate blades, the central axis divides elongate blades
At opposite elongate end, the elongate end extends from the central axis.Elongate blades have blade main shaft.It is described thin
Long blade limits bending part and makes the bending part opposite with cutting edge.The bending part is from elongate blades along upward
Direction extends, and two components meet and are bent towards the lower surface of the elongate blades.The bending part is in blade main shaft
Major part on have constant cross section.
Detailed description of the invention
It, will be when reference attached drawing reads following description, before of the invention for the technical staff in field involved by the present invention
Stating aspect and other aspects will become obvious, in which:
Fig. 1 is the isometric view of the exemplary low profile mower blade of at least one embodiment according to the present invention.
Fig. 2 is the front view of low profile mower blade shown in FIG. 1；
Fig. 3 is the top view of low profile mower blade shown in FIG. 1；
Fig. 4 is cross-sectional view of the Fig. 1 along hatching 4-4；
Fig. 5 is cross-sectional view of the Fig. 1 along hatching 5-5；With
Fig. 6 is the isometric view of low profile mower blade, shows alternative mounting arrangements.
It should be noted that all pictures be all exemplary rather than it is drawn to scale.Clearly and conveniently for picture
For the sake of, many multipart relative sizes and ratio are shown according to the size exaggerated or reduced in these pictures.It is identical
Accompanying drawing number is commonly used to refer to character pair or similar characteristics in different embodiments.Therefore, the drawing and description
It is in itself considered illustrative rather than restrictive.
Specific embodiment
Embodiment in conjunction with one or more aspects of the present invention is described and uses in the accompanying drawings.The implementation of these diagrams
Example can't become limitation of the invention.For example, one or more aspects of the present invention can be used in other embodiments,
Even it can be used in other kinds of equipment.Moreover, certain terms used herein are not construed as only merely for conveniently
Limitation of the present invention.In addition, in the accompanying drawings, identical appended drawing reference is for specifying identical element.
Fig. 1 is gone to, it illustrates a kind of isometric views of illustrative low profile mower blade 20.The low profile is cut
Careless machine knife blade 20 includes elongate blades 24, and the elongate blades 24 have first end edge 26 and the second end relative to each other
Edge 28.First side margins 30 and the second side margins 34 are also relative to each other, and the first end edge 26, second end
Portion edge 28, the first side margins 30 and the second side margins 34 constitute four of the low profile mower blade 20 together
Side.
The low profile mower blade 20 is adapted to mount to lawn care apparatus (such as rotary mower) and (does not show
On out), to be rotated around the central axis 36 extended along the direction for crossing the elongate blades 24.The central axis 36 will
Elongate blades 24 are divided into opposite elongate end 38,40, and the elongate end 38,40 extends from the central axis 36.It is described
Elongate blades 24 further include blade main shaft 44.
In one embodiment, the elongate blades 24 can be configured with pairs of sharp cutting edge 46.It is described sharp
Cutting edge 46 be located in first side edge 30 and second side edge 34 so that when the low profile mower blade 20 is along arrow
When direction shown in first 48 rotates, sharp cutting edge 46 is located in the leading edge of elongate blades 24 to cut grass and/or plant
Quilt.In one embodiment, the sharp cutting edge 46 can have two inches to six inches of length.
The center portion 50 of the low profile mower blade 20 may include for by the low profile mower blade 20
The structure being installed on rotary shaft (such as main shaft, engine shaft etc.), passes through the low profile mower blade 20
Power source rotation on rotary mower (not shown).The power source can be any suitable power source, including but not
It is limited to gasoline powered engine (gasoline powered engine), wire control electric machine (corded electric
Motor), battery driven motor etc..Similarly, low profile mower blade 20 can limit one or more Kong Yiyu positioned at rotation
Physical features on rotatable grass trimmer match, so that the low profile mower blade 20 is attached to the rotary mowing
Structure on machine.It is contemplated by the invention that all suitable attachment structures or restriction.
Fig. 2 is turned to, the front view of illustrative low profile mower blade 20 is shown.As shown, being cut in low profile
The lower right side of careless machine knife blade 20 shows a sharp cutting edge 46.
Many cutting blades and mower blade include the inclined surface or sail shape surface opposite with sharp cutting edge 46,
To generate lower air pressure above rotary cutting blade, and higher air pressure is generated thereunder, to effectively promote
Grass, other vegetation and subsequent grass cuttings are promoted.The promotion can be used for promoting grass and vegetation straight and upright before being cut, and mention
Grass cuttings are moved to collecting bag for strength or are removed from blow tank (not shown).However under specific circumstances, such as in soil
In the sand containing higher percent position on cutting grass and/or vegetation, the inclined surface or sail shape surface are along inclination
The length on surface is constantly by the shock of the grains of sand.In turn, this institute that can effectively polish or wear in a relatively short period of time
State inclined surface.
Fig. 3 is turned to, the top view of the low profile mower blade 20 is shown.As it was noted above, low profile grass trimmer
Blade includes elongate blades 24, and the elongate blades 24 have from the end 38 that central axis (being indicated by 36 point) extends,
40.The elongate blades 24 further include blade main shaft 44, and configured with pairs of sharp cutting edge 46.Sharp cutting edge
46 are located in first side edge 30 and second side edge 34, so that when the low profile mower blade 20 is along shown in arrow 48
Direction when rotating, sharp cutting edge 46 is located in the leading edge of elongate blades 24 to cut grass and/or vegetation.
Fig. 4 is turned to, the cross section view of the elongate blades 24 is shown.The elongate blades 24 limit bending part
54 so that the bending part 54 and sharp cutting edge 46 are opposite, rather than including the sail shape surface opposite with cutting edge or
Inclined surface.As shown, the bending part 54 from elongate blades 24 along upwardly direction from the sharp cutting edge
46 and the bending part 54 at extend.In this embodiment, term " upward direction " is for limiting perpendicular to driven surfaces (example
Such as, turf) direction, this is typically considered " upward " for the normal operation of lawn care apparatus.Then, described
Bending part 54 is bent to the point of the downwardly lower surface 56 of the elongate blades 24.When the low profile mower blade 20
When rotating around central axis 36, the bending part 54 provides the air turbulence substantially reduced.The reduction of air turbulence promotes
Object (for example, grains of sand) flows to the above and behind of the low profile mower blade 20 of rotation, rather than hits the low wheel
The part of wide mower blade 20, such as sail shape part or sloping portion, and then damage sail shape part or sloping portion.
Flow pattern is usually as shown in the arrow 58 in Fig. 4.
The bending part 54 limits concave shaped space 60 on the lower surface of elongate blades 24 56.The concave shaped space 60 is also
Promote to generate low pressure above grass and/or vegetation to promote grass and/or vegetation to be in stand up position, will pass through the low of rotation
Profile mower blade 20 is cut.
In at least one embodiment of the low profile mower blade 20, the bending part 54 of the elongate blades 24
Including distal portions 64, the distal portions 64 deviate the sharp cutting edge 46 in vertical direction.As shown in figure 3, edge
The offset of cutting edge 46 sharp described in the line measurement substantially parallel with central axis 36 apart from the distal portions 64.
In a kind of specific embodiment, the distal portions 64 of the bending part 54 are in driven surfaces (for example, turf) short transverse
Higher than the sharp cutting edge 46, this offset distance is indicated by size 66.With the geometry class of the bending part 54
Seemingly, the offset distance 66 helps to generate promotion during the rotation of low profile mower blade 20.In one embodiment,
The offset distance 66 is less than about one-half inch (1.2cm).In another embodiment, the offset distance 66 is greater than about
Quarter inch (0.6cm).
Fig. 5 is gone to, shows another cross section view of the elongate blades 24.In addition to Ref. No., Fig. 4 and Fig. 5
It is identical.This compares for being shown on most blade main shaft 44, and the elongate blades 24 have constant transversal
Face.When the low profile mower blade 20 is zoomed to different grass trimmer application scenarios, this may be particularly useful.
For example, and devised 28 inches of long blades if hand-push type mower needs 30 inches of long blades, then designer
Can another inch only be added to form 30 inches of long blades in each end 38,40.Similarly, in order to design have compared with
The low profile mower blade 20 of short length, designer need to only remove required length from each end 38,40.This can be saved
Design and process time, thus save the cost.
It is further noted that center portion 50 and end 38 of the bending part 54 in low profile mower blade,
Bending Stability is enhanced between 40.In the mower blade of many relative flats, flat metal stock all becomes in two sides
Must be sharp, for use as mower blade.However, these known flat blades are generally deficient of Bending Stability and may bases
Direction shown in arrow 68 is bent in Fig. 2.It is not intended to it is understood that such bending can be brought on mowing height
That sees is irregular, and it is coarse to cause to mow, this is usually unfavourable.Similarly, the bending part 54 is to elongated
It is beneficial that blade 24, which brings additional rigidity,.
Fig. 6 is gone to, shows alternative mounting structure.As previously mentioned, any suitable mounting structure or limit can be with
Low profile mower blade 20 of the invention is used together.As one embodiment, Fig. 6 show hole 70 and embossed area 74
(embossed areas), it is suitable for such as U.S. Patent Application No. US14/847,909 and its patent families described in quickly more
Change the scheme of connection attachment.
The device of the invention has multiple benefits.When grass trimmer has compared with using on the soil of high sediment concentration or surface
When, low profile mower blade can extend the service life of mower blade.In some embodiments, low profile mowing machine knife
The lasting of piece can be up to sail shape surface or inclined surface to generate the four of traditional mower blade of promotion using the time
Times.In other many embodiments, the blade it is lasting using the time up to three times of traditional mower blade.Separately
Outside, with it is traditional use the mower blade on sail shape surface compared with, low profile mower blade can have bigger surface area
To deflect the object of such as grains of sand etc.Although the low profile mower blade has bigger surface area, can also be only
A large amount of blade abrasions caused by being hit by object are only substantially reduced and with low profile.This lower profile can also be big
Width reduces the drag being applied on low profile mower blade.In some cases, compared with the mower blade of standard,
The range of decrease of drag may be up to 12.5%.
Other benefits may include: readily scalable to the other grass trimmer application scenarios of constant blade cross section profile
(for example, longer or shorter blade lengths).The low profile mower blade can also provide curved along blade main shaft
Bent stability or rigidity, with reduce and/or eliminate due to mower blade end during operation relative to center portion above and below
It moves and leads to coarse cutting.
Although inventor has been combined above-mentioned specific embodiment and writes the present invention, it is clear that there are many alternative selection, combination,
It would have been obvious for a person skilled in the art for modified variant and adjustment variation.Therefore, as described above, the present invention is retouched
What the embodiment stated was intended to be illustrative, rather than it is restrictive.The case where not departing from concept thereof of the invention and range
Under, adjustment that various modifications may be made.Those skilled in the art are when studying description above, above embodiment and other realities
The combination for applying mode is it will be apparent that and being intended to these embodiments include wherein for them.Therefore, of the invention
Protection scope be defined by the appended claims, and all device, process and methods by text or wait Tongfangs
Formula is limited in the meaning of described claims, and is included in.In addition, in the detailed description or the claims
In the range of the term "comprising" used, which is intended that inclusiveness, and limited way is used as with term " includes "
The explanation when transitional phrase of one claim is similar.
Claims (7)
1. a kind of mower blade (20) for lawn care apparatus, it is characterised in that:
Elongate blades (24), the elongate blades (24) have opposite end edge (26,28) and opposite side margins 30,
34), the elongate blades (20) are adapted to mount on rotary mower, around along crossing the elongate blades (20)
Central axis (36) rotation that direction extends, and the elongate blades (20) are divided into opposite elongate end (38,40), it is described
Elongate end (38,40) extends from the central axis (36), and the elongate blades (20) have blade main shaft (44),
In,
The elongate blades (20) limit bending part (54), so that the bending part (54) and sharp cutting edge (46) phase
It is right, and
The bending part (54) upwardly extends from the two place of meeting of the elongate blades (20) and towards the elongate blades
(20) lower surface (56) bending.
2. mower blade (20) according to claim 1, which is characterized in that the bending part (54) is described elongated
Concave shaped space (60) are limited on the lower surface (56) of blade (20).
3. mower blade (20) according to claim 1 to 2, which is characterized in that the distal portion of the bending part (54)
Divide (64) in vertical direction from sharp cutting edge (46) offset, to generate promotion during rotation.
4. mower blade (20) according to claim 3, which is characterized in that the distal end of the bending part (54)
Partially (64) are higher than the sharp cutting edge (46) in height.
5. according to mower blade described in claim 3-4 (20), which is characterized in that the bending part (54) it is described remote
End part (64) is higher by the sharp cutting edge (46) less than about one-half inch (1.2cm) in height.
6. according to mower blade described in claim 3-5 (20), which is characterized in that the bending part (54) it is described remote
End part (64) is higher by the sharp cutting edge (46) in height and is greater than about quarter inch (0.6cm).
7. mower blade described in -5 (20) according to claim 1, which is characterized in that the bending part (54) is in major part
The blade main shaft (44) on have constant cross section.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201662397177P | 2016-09-20 | 2016-09-20 | |
| US62/397,177 | 2016-09-20 | ||
| US29/578,374 USD816445S1 (en) | 2016-09-21 | 2016-09-21 | Cutting blade |
| US29/578,374 | 2016-09-21 | ||
| PCT/US2017/052384 WO2018057552A1 (en) | 2016-09-20 | 2017-09-20 | Low profile mower blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109952020A true CN109952020A (en) | 2019-06-28 |
Family
ID=59997489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780070700.XA Pending CN109952020A (en) | 2016-09-20 | 2017-09-20 | Low profile mower blade |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN109952020A (en) |
| AU (2) | AU2017332128A1 (en) |
| CA (1) | CA3041627A1 (en) |
| WO (1) | WO2018057552A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI695673B (en) * | 2019-09-25 | 2020-06-11 | 何炳梓 | A knife and a lawn mower having the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2799985A (en) * | 1954-05-26 | 1957-07-23 | Motor Wheel Corp | Rotary lawn mower safety blade |
| GB2050792A (en) * | 1979-05-25 | 1981-01-14 | Goebler H | Lawnmower blades |
| US5775078A (en) * | 1996-07-19 | 1998-07-07 | Warren; Richard C. | Rotary lawn mower |
| EP0894427A1 (en) * | 1997-07-29 | 1999-02-03 | JAVERLHAC, Jean-Charles | Knive for crusher |
| EP2636296A1 (en) * | 2012-03-07 | 2013-09-11 | SABO-Maschinenfabrik GmbH | Knife bar |
| CN105075497A (en) * | 2014-04-21 | 2015-11-25 | 苏州宝时得电动工具有限公司 | Cutting blade of mower |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6301868B1 (en) | 1999-08-26 | 2001-10-16 | James D. Siplinger | Vortex reducing mower blade |
-
2017
- 2017-09-20 CA CA3041627A patent/CA3041627A1/en not_active Abandoned
- 2017-09-20 CN CN201780070700.XA patent/CN109952020A/en active Pending
- 2017-09-20 WO PCT/US2017/052384 patent/WO2018057552A1/en unknown
- 2017-09-20 AU AU2017332128A patent/AU2017332128A1/en not_active Abandoned
-
2021
- 2021-02-10 AU AU2021200853A patent/AU2021200853A1/en not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2799985A (en) * | 1954-05-26 | 1957-07-23 | Motor Wheel Corp | Rotary lawn mower safety blade |
| GB2050792A (en) * | 1979-05-25 | 1981-01-14 | Goebler H | Lawnmower blades |
| US5775078A (en) * | 1996-07-19 | 1998-07-07 | Warren; Richard C. | Rotary lawn mower |
| EP0894427A1 (en) * | 1997-07-29 | 1999-02-03 | JAVERLHAC, Jean-Charles | Knive for crusher |
| EP2636296A1 (en) * | 2012-03-07 | 2013-09-11 | SABO-Maschinenfabrik GmbH | Knife bar |
| CN105075497A (en) * | 2014-04-21 | 2015-11-25 | 苏州宝时得电动工具有限公司 | Cutting blade of mower |
Also Published As
| Publication number | Publication date |
|---|---|
| CA3041627A1 (en) | 2018-03-29 |
| WO2018057552A1 (en) | 2018-03-29 |
| AU2021200853A1 (en) | 2021-03-04 |
| AU2017332128A1 (en) | 2019-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190628 |
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| WD01 | Invention patent application deemed withdrawn after publication |