US20140116018A1 - Dual bladed walk power mower with timed blade drive system carried on an apron of a power source mount - Google Patents
Dual bladed walk power mower with timed blade drive system carried on an apron of a power source mount Download PDFInfo
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- US20140116018A1 US20140116018A1 US13/845,553 US201313845553A US2014116018A1 US 20140116018 A1 US20140116018 A1 US 20140116018A1 US 201313845553 A US201313845553 A US 201313845553A US 2014116018 A1 US2014116018 A1 US 2014116018A1
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- United States
- Prior art keywords
- deck
- mower
- blades
- mount
- apron
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Classifications
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- 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
- A01D34/67—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 hand-guided by a walking operator
- A01D34/68—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 hand-guided by a walking operator with motor driven cutters or wheels
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D43/00—Mowers combined with apparatus performing additional operations while mowing
- A01D43/06—Mowers combined with apparatus performing additional operations while mowing with means for collecting, gathering or loading mown material
- A01D43/063—Mowers combined with apparatus performing additional operations while mowing with means for collecting, gathering or loading mown material in or into a container carried by the mower; Containers therefor
- A01D43/0636—Flexible containers
-
- 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
- A01D34/64—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 mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle
- A01D34/66—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 mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle with two or more cutters
- A01D34/667—Means for directing the cut crop
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- 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
- A01D34/67—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 hand-guided by a walking operator
- A01D34/68—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 hand-guided by a walking operator with motor driven cutters or wheels
- A01D34/6806—Driving mechanisms
-
- 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
- A01D34/67—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 hand-guided by a walking operator
- A01D34/68—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 hand-guided by a walking operator with motor driven cutters or wheels
- A01D34/685—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 hand-guided by a walking operator with motor driven cutters or wheels with two or more cutters
Definitions
- This invention relates to mowers and, more particularly, to walk power mowers which are operated by a user who walks on the ground behind the mower when operating the mower.
- Walk power mowers are well known for cutting grass. Such mowers are characterized by a relatively small mower deck, typically one that provides a 21′′ cutting width, which is supported by four wheels at the corners of the deck for rolling over the ground.
- the underside of the deck typically includes a substantially circular cutting chamber.
- the cutting chamber houses a single rotary cutting blade that rotates about a substantially vertical axis in a substantially horizontal cutting plane.
- a small internal combustion engine or electric motor is laterally centered on top of the mower deck. The shaft of the engine or motor extends down through the top wall of the mower deck into the cutting chamber to be attached to the cutting blade.
- the cutting chamber has a rearwardly extending discharge tunnel that progressively increases in height as it extends rearwardly to accommodate the grass clippings.
- the tunnel ends in a rearwardly facing grass discharge opening that is mated to the open mouth of the bag.
- the tunnel and the bag are positioned so that they do not extend beyond the lateral sides of the deck to allow the mower to cut close to the sides of various structures, e.g. to cut all the way up to a flower bed, retaining wall or the like.
- Mowers of the type noted above have conventionally been restricted to single bladed mowers having the aforementioned small cutting width. If the cutting width could be dramatically increased from say 21′′ to 30′′ or so, the user could cut 50% more grass on each cutting swath of the mower. This would greatly increase productivity by decreasing the amount of time needed to mow a particular area of grass. However, such a larger walk power mower could be stored in one's garage in much less space than that required for storing a riding mower. Thus, the ease of storage and greater productivity offered by a wide swath, walk power mower would be an attractive and less expensive alternative to a riding mower.
- the two cutting blades are normally positioned in one of two different ways: 1.) the blades can be set generally side-by-side relative to one another but staggered fore and aft relative to one another so that their cutting orbits overlap one another in the middle of the deck but do not intersect with one another, or 2.) the blades can be set entirely or directly side-by-side relative to one another with no longitudinal staggering and with their cutting orbits intersecting with one another. With the latter approach, it is necessary to time the rotation of the dual blades relative to one another using a timing belt so that the dual blades do not hit one another as they rotate.
- a timing belt system requires fairly high belt tension to avoid the belt from coming off the cogged timing pulleys. Such high belt tension can warp or deform the fairly light mower decks typically used in these types of mowers.
- a walk power mower which comprises a mower deck having a downwardly facing cutting chamber which encloses a pair of rotary cutting blades.
- the blades are arranged substantially directly side-by-side relative to one another and rotate in a substantially common plane with the orbits of the blades intersecting in a central portion of the cutting chamber to collectively cut an unbroken swath of grass that is wider than a width of either blade alone.
- a plurality of ground engaging wheels is carried on the mower deck for supporting the mower deck for rolling over the ground.
- An upwardly and rearwardly extending handle assembly is carried on the mower deck to permit an operator who is walking on the ground behind the mower deck to grip the handle assembly to guide and manipulate the mower deck during movement of the mower deck.
- a power source is carried atop the mower deck for rotating the cutting blades.
- a drive system is operatively connected to the power source and to the blades for rotating the blades in a timed, out of phase relationship relative to one another so that the blades do not hit one another as they rotate.
- the timed drive system includes a pair of vertical spindles carrying the blades.
- the mower deck comprises a mount for the power source.
- the mount has a U-shaped, downwardly facing mounting deck having a top wall to which the power source is fixed.
- the top wall has an opening for receiving a vertically extending drive shaft of the power source with the drive shaft having a lower end that terminates below the top wall of the mounting deck.
- the mount further has a substantially horizontal apron that extends forwardly from the mounting deck with the apron having a pair of laterally spaced openings for receiving the spindles of the drive system.
- the mount including the mounting deck and apron is cast as an integral, one-piece part from metal.
- the mower deck further comprises a deck shell that includes a top wall having a downwardly extending peripheral sidewall that forms the cutting chamber.
- the deck shell has a pair of laterally spaced spindle receiving openings that are aligned beneath the openings in the apron of the mount when the deck shell is fixed to the mount.
- the deck shell is stamped out of metal as an integral, one-piece part.
- the mount and the deck shell are fixed to one another.
- FIG. 1 is a front perspective view of one embodiment of a mower according to this invention, particularly illustrating the mower in a mulching mode;
- FIG. 2 is a top plan view of the mower of FIG. 1 ;
- FIG. 3 is a side elevational view of the mower of FIG. 1 ;
- FIG. 4 is a rear perspective view of the mower of FIG. 1 ;
- FIG. 5 is a perspective view of a portion of the underside of the mower of FIG. 1 ,
- FIG. 6 is a perspective view of the mower of FIG. 1 , but showing the mower with the side discharge opening having been opened with the side discharge chute in place, and also showing the rear bag having been installed at the rear of the mower in mating engagement with the rearwardly extending grass discharge tunnel, thereby illustrating both the side discharge and rear bagging modes of the mower;
- FIG. 7 is a front perspective view of the components of the mower deck, namely of the engine mount, the deck shell and the deck shroud, that form the mower deck of the mower of FIG. 1 , particularly illustrating the components in an exploded form;
- FIG. 8 is a rear perspective view showing the deck of FIG. 7 with the deck shroud having been exploded away from the assembled engine mount and deck shell;
- FIG. 9 is a top plan view of the mower deck of FIG. 7 ;
- FIG. 10 is a top plan view of a portion of the mower of FIG. 1 , particularly illustrating the blade drive system comprising the dual cogged drive pulleys and the timing belt entrained around such drive pulleys;
- FIG. 11 is a perspective view of the blade drive system of FIG. 10 , but showing one of the cogged drive pulleys in exploded form with the timing belt having been removed;
- FIGS. 12 and 13 are top plan views illustrating the operation of a belt tensioning mechanism that is part of the blade drive system of FIG. 10 ;
- FIG. 14 is an exploded perspective view of a portion of a height of cut adjustment device for the mower of FIG. 1 , particularly illustrating a removable insert forming a locking pin used on a locking spring arm in the height of cut adjustment device;
- FIG. 15 is a front perspective view of the deck shell of the mower deck of the mower of FIG. 1 , particularly illustrating a side discharge chute having been installed on a side discharge opening on the deck shell;
- FIG. 16 is an enlarged perspective view of the side discharge chute of FIG. 15 , particularly illustrating the chute in an exploded orientation relative to the side discharge opening with a flow cutoff baffle being carried on the chute adjacent a rear wall of the chute;
- FIG. 17 is a bottom plan view of the deck shell of FIG. 15 , particularly illustrating the side discharge chute in place on the deck shell with the flow cutoff baffle extending inwardly through the side discharge opening into a portion of the cutting chamber;
- FIG. 18 is a perspective view of the side discharge chute of FIG. 15 looking inwardly from an outboard side to an inboard side of the chute;
- FIG. 19 is a perspective view of the side discharge chute of FIG. 15 looking outwardly from an inboard side to an outboard side of the chute.
- a first embodiment according to this invention of a mower for cutting grass is generally illustrated as 2 herein.
- Mower 2 comprises a mower deck 4 supported for rolling over the ground by four rotatable, ground engaging wheels 6 carried at the four corners of deck 4 .
- a U-shaped handle assembly 8 is attached to mower deck 4 comprising a pair of upwardly and rearwardly extending handle tubes 10 which are connected together at their upper ends by a substantially horizontal cross bar 12 .
- Cross bar 12 is wide enough to allow a user who stands on the ground behind mower 2 to grip and hold cross bar 12 with both hands.
- Cross bar 12 can optionally slide up and down on handle tubes 10 to vary the ground speed of mower 2 as disclosed in the assignee's U.S. Pat. No. 6,082,083, which is hereby incorporated by reference.
- a power source comprising an internal combustion engine 14 is mounted atop deck 4 .
- Engine 14 powers a transmission (not shown) for propelling the rear wheels 6 of mower 2 to cause mower 2 to be self-propelled.
- Engine 14 also powers a pair of grass cutting blades 16 through a blade drive system 18 .
- Any suitable transmission or wheel drive system could be used on mower 2 and need not be further discussed herein.
- blade drive system 18 comprises one aspect of this invention and will thus be described in more detail hereafter.
- Mower 2 operates either in a mulching mode, a side discharge mode, or a rear bagging mode.
- the mulching mode the grass clippings are confined within deck 4 until the clippings are forced or fall downwardly through an open bottom 66 of deck 4 .
- a side discharge opening 20 is open to allow the clippings to be thrown from mower 2 to one side of deck 4 .
- a rear discharge opening 22 formed by the rear end of a rearwardly extending grass discharge tunnel 24 is open. This allows the clippings to be thrown through tunnel 24 and out through discharge opening 22 into a space that is laterally positioned between lower portions of handle tubes 10 when viewed from above as indicated by the tunnel discharge arrow S in FIG. 2 .
- a grass collection bag 26 that has a mouth mated with rear discharge opening 22 .
- bag 26 extends substantially straight back in a rearward direction from mower deck 4 to terminate in a rear end 27 that lies beneath upper portions of handle tubes 10 .
- FIGS. 1-5 depict mower 2 configured for operation in the mulching mode.
- side discharge opening 20 is blocked by a pivotal side door 28 and tunnel 24 is blocked or closed by a pivotal rear door 30 .
- Tunnel 24 can be additionally blocked by a removable mulch plug (not shown) that is inserted into tunnel 24 in the mulching mode.
- FIG. 6 shows side door 28 having been pivoted upwardly to open side discharge opening 20 with a side discharge chute 160 having been installed on side discharge opening 20 .
- FIG. 6 also shows rear door 30 having been pivoted upwardly to open tunnel 24 with bag 26 being mated to tunnel 24 . While FIG. 6 has been used to show mower 2 as it would appear in both the side discharge and the rear bagging modes, it should be understood that both of these modes would not be used simultaneously, i.e. the user would pick either the side discharge mode or the rear bagging mode.
- deck 4 i.e. an engine mount 32 , a deck shell 34 , and a rear deck shroud 36 . These components are screwed or bolted together to form deck 4 .
- deck 4 also includes a front bracket 38 that is secured or attached, e.g. bolted, to the front of deck shell 34 .
- Front bracket 38 is used for mounting the front wheels 6 of mower 2 to deck 4 . While front bracket 38 also is part of deck 4 , it need not be described in as much detail as engine mount 32 , deck shell 34 and rear shroud 36 .
- engine mount 32 is formed with a downwardly facing, U-shaped engine deck 40 having a top wall 42 that is provided with a large circular opening 44 for receiving the drive shaft (not shown) of engine 14 .
- Engine 14 is mounted atop the top wall 42 of engine deck 40 over the drive shaft receiving opening 44 by being bolted to top wall 42 at various locations.
- engine mount 32 is formed with an upwardly facing U-shaped trough 46 immediately contiguous to an innermost sidewall 48 of engine deck 40 .
- Innermost sidewall 48 of engine deck 40 also does double duty by serving as the innermost sidewall of trough 46 .
- a substantially horizontal front apron 50 extends forwardly from the front of engine deck 40 and trough 46 .
- engine deck 40 , trough 46 and apron 50 of engine mount 32 are collectively formed as a single, one-piece cast aluminum part having a wall thickness of approximately 140 thousandths of an inch (0.140′′) to provide great strength.
- apron 50 of engine mount 32 includes two relatively small circular openings 52 for receiving the upper ends of a pair of spindles 80 that mount cutting blades 16 .
- Each opening 52 is surrounded by four threaded apertures 56 .
- fasteners 86 will be tightened into apertures 56 to attach engine mount 32 to deck shell 34 and to a pair of bearing housings 82 which carry spindles 80 .
- Deck shell 34 is the part of deck 4 that forms a cutting chamber 60 which encloses blades 16 .
- Shell 34 comprises an integral, one-piece stamped steel part having a wall thickness that is approximately one third thinner than the wall thickness of the cast aluminum engine mount 32 , i.e. a wall thickness of approximately 90 thousandths of an inch (0.090′′) for shell 34 .
- Shell 34 has a top wall 62 that is bounded by a peripheral, downwardly extending sidewall 64 to form cutting chamber 60 .
- Cutting chamber 60 has an open bottom 66 that faces downwardly towards the ground. See FIG. 8 .
- a circumferential lip 67 extends a short distance outwardly from a lower edge of sidewall 64 .
- Shell 34 is interrupted in two places to form side discharge opening 20 as well as a rear outlet 68 . See FIGS. 15 and 16 .
- a portion of outlet 68 is formed in sidewall 64 of shell 34 and a portion of outlet 68 is formed in top wall 62 of shell 34 .
- Outlet 68 is mated to the inlet or entrance to tunnel 24 so that clippings generated within cutting chamber 60 pass upwardly from cutting chamber 60 of shell 34 through outlet 68 into the front end of tunnel 24 .
- shell 34 includes a shallow recessed central portion 70 having a depth approximately equal to the wall thickness of apron 50 .
- Central portion 70 includes two circular openings 72 that correspond in size, shape and relative location to circular openings 52 in apron 50 of engine mount 32 .
- Circular openings 72 are each surrounded by four smooth apertures 76 .
- Apron 50 of engine mount 32 can be nested down within recessed central portion 70 when engine mount 32 and shell 34 are assembled together with circular openings 52 , 72 in both parts and surrounding apertures 56 , 76 being superimposed on top of one another.
- engine mount 32 wraps closely around the rear face of peripheral sidewall 64 with the front ends of lower edges 73 of the sidewalls 74 of engine mount 32 engaging at two spaced locations atop the rear side of lip 67 of shell 34 . See FIGS. 7 and 8 .
- Apertures are provided in lip 67 at these locations that are aligned with threaded bosses 77 on sidewalls 74 to provide a pair of attachment points between engine mount 32 and shell 34 that are in addition to the eight other attachment points provided collectively by the superimposed apertures 56 , 76 .
- deck shroud 36 is L-shaped having a U-shaped, downwardly facing channel 78 along one side of shroud 36 .
- Channel 78 in shroud 36 is substantially the same size and shape as trough 46 in engine mount 32 .
- trough 46 in engine mount 32 and channel 78 in shroud 36 together form tunnel 24 .
- Trough 46 forms the lower portion of tunnel 24 and channel 78 forms the upper portion of tunnel 24 .
- Shroud 36 preferably comprises an integral, one-piece molded plastic part.
- spindles 80 extend into cutting chamber 60 with blades 16 being bolted to bottom ends of spindles 80 .
- Spindles 80 are rotatably supported by bearings (not shown) contained within bearing housings 82 .
- bearing housing 82 is cast from metal as a single piece.
- each bearing housing 82 has four outwardly extending mounting arms 84 containing apertures at the ends of arms 84 .
- the apertures at the end of arms 84 have the same spacing and orientation as apertures 56 , 76 in top wall 62 of shell 34 and in apron 50 of engine mount 32 .
- bearing housings 82 are installed in cutting chamber 60 of shell 34 with arms 84 abutting the underside of top wall 62 of shell 34 .
- Engine mount 32 is laid on top wall 62 of shell 34 with apron 50 being received in recessed portion 70 .
- Threaded fasteners 86 such as machine bolts, are then passed up through the apertures at the ends of arms 84 on each bearing housing 82 and through the aligned apertures 76 , 56 to be screwed upwardly into the four threaded apertures 56 on engine mount 32 .
- spindles 80 carried in bearing housings 82 are each securely bolted to the relatively thick, cast aluminum apron 50 of engine mount 32 with the stamped steel top wall 62 of shell 34 being tightly sandwiched between apron 50 and bearing housings 82 .
- This provides a very strong and durable structure for deck 4 that is sufficient for withstanding relatively high tension in the drive belt used to power spindles 80 without warping deck 4 .
- This strength and durability is further enhanced by the two additional fasteners 88 that bolt lower edges 73 of sidewalls 74 of engine mount 32 to lip 67 of shell 34 . See FIG. 5 .
- Blades 16 are arranged side-by-side relative to one another with the orbits of the tips of blades 16 intersecting one another along the middle of shell 34 . As best shown in FIG. 8 , blades 16 are oriented at right angles relative to one another which orthogonal orientation is maintained by blade drive system 18 so that blades 16 do not hit one another as they rotate. Referring to FIG. 5 , blade drive system 18 rotates each blade 16 in the same rotational direction indicated by the arrow A. Thus, the clippings cut by blades 16 circulate in a circumferential path inside cutting chamber 60 defined by a shallow downwardly facing channel 63 in top wall 62 formed between sidewall 64 and recessed central portion 70 . The circumferential path of the circulating clippings is indicated by the arrows B in FIG. 5 which show that such path is directed first towards side discharge opening 20 and then to tunnel 24 should side discharge opening 20 be closed.
- baffles used in the circumferential path B that serve to separate one blade 16 from the other. This permits the clippings generated by the action of both blades 16 to smoothly merge into one common stream.
- the only baffle of any type used in cutting chamber 60 is a rear generally V-shaped baffle 90 at the back of cutting chamber 60 having an apex 92 that faces towards the front of cutting chamber 60 .
- FIGS. 10 and 11 depict blade drive system 18 that powers the dual cutting blades 16 of mower 2 of this invention.
- Engine 14 has been removed from FIGS. 10 and 11 for the sake of clarity.
- two drive belts 94 and 96 that would be powered by the drive shaft of engine 14 are still shown in FIGS. 10 and 11 .
- drive belt 94 extends to the rear of engine deck 40 for powering the transmission (not shown) that drives rear wheels 6 .
- drive belt 96 extends to the front of engine deck 40 outwardly through an access opening 98 in the front wall of engine deck 40 .
- FIG. 10 depict blade drive system 18 that powers the dual cutting blades 16 of mower 2 of this invention.
- Engine 14 has been removed from FIGS. 10 and 11 for the sake of clarity.
- two drive belts 94 and 96 that would be powered by the drive shaft of engine 14 are still shown in FIGS. 10 and 11 .
- drive belt 94 extends to the rear of engine deck 40 for powering the transmission (not shown) that drives rear wheels 6
- drive belt 96 is entrained around a driven pulley 100 on the top of left spindle 80 to rotate the left spindle and thereby rotate left cutting blade 16 .
- the adjectives left and right are used with reference to a user who is standing behind mower 2 looking forwardly.
- a cogged timing pulley 102 is located on the right spindle 80 that is bolted to the right cutting blade 16 .
- An identical cogged pulley 104 is located beneath the driven pulley 100 on the left spindle 80 for the left cutting blade 16 .
- Both cogged pulleys 102 and 104 are located on the upper ends of spindles 80 and lie substantially immediately above apron 50 of engine mount 32 .
- a cogged timing belt 106 passes around pulleys 102 and 104 to maintain the necessary rotational timing between spindles 80 .
- blades 16 are to be disposed offset relative to one another by 90°. It is cogged timing belt 106 in engagement with cogged pulleys 102 and 104 that maintains this offset to ensure that blades 16 do not strike one another even though their orbits intersect.
- a belt cover 108 normally covers blade drive system 18 including both timing pulleys 102 and 104 and timing belt 106 .
- Belt cover 108 is shown in place FIGS. 1-4 and 6 but has been removed from FIGS. 10 and 11 for the sake of clarity.
- Belt cover 108 is usually held in place by releasable fasteners 110 as shown in FIG. 2 that can be screwed into upwardly extending threaded bosses 112 as shown in FIG. 7 that are provided on engine mount 32 .
- locator system 114 In initially assembling mower 2 or whenever timing belt 106 needs to be replaced, a unique and easy to use locator system 114 is provided for locating timing pulleys 102 and 104 in their correct positions. As best shown in FIG. 11 , locator system 114 comprises a guide hole 116 located in apron 50 of engine mount 32 adjacent each of the circular openings 42 in apron 50 through which spindles 80 extend. Guide hole 116 for opening 52 that receives the left spindle 80 is located at a 6 o'clock position while guide hole 116 for opening 52 that receives the right spindle 80 is located at a 9 o'clock position. Thus, the two guide holes 116 are offset from one another by 90°. Guide holes 116 do not extend through into cutting chamber 60 as they are blocked by an underlying portion of deck shell 34 or alternatively because they are formed only partially through the thickness of apron 50 .
- timing pulley 102 and 104 has a through hole 118 located on a radius that overlies guide holes 116 .
- timing pulleys 102 and 104 and spindles 80 are configured so that they pulleys 102 and 104 can be installed on spindles 80 in only one orientation.
- the user can align through hole 118 in timing pulley 102 with guide hole 116 adjacent the opening for the right spindle 80 and then drop a pin or rod (not shown) through the aligned holes 118 and 116 to locate timing pulley 102 in exactly the correct position to hold the right cutting blade 16 at the correct orientation within cutting chamber 60 .
- the same thing can be done with through hole 118 for timing pulley 104 for the left spindle 80 and its corresponding guide hole 116 .
- timing pulleys 102 and 104 have been simply and easily located in the correct positions so that cutting blades 16 are correctly offset 90° from one another. This avoids the user having to continually look beneath top 62 wall of shell 34 to manually and visually observe the two blades 16 and attempt to position them by hand at the required offset.
- the alignment of through holes 118 in timing pulleys 102 and 104 with the offset guide holes 116 provided in deck 4 and the use of a temporarily inserted bolt though the aligned sets of holes automatically does the same thing.
- the user can then install timing belt 106 around the timing pulleys 102 and 104 with certainty that blades 16 are in their correct offset positions. After timing belt 106 has been so installed, the bolts used to temporarily hold timing pulleys 102 and 104 in place can be pulled upwardly out of through holes 118 in timing pulleys 102 and 104 .
- Timing belt 106 is appropriately tensioned by passing around two idler pulleys 120 and 122 that engage the smooth backside of timing belt 106 .
- Idler pulley 120 rotates around a fixed vertical pivot axis 121 on deck 4 .
- the other idler pulley 122 rotates around a vertical pivot axis 123 that is carried on an adjustable slide 124 .
- Slide 124 is L-shaped having a vertical front wall 126 and a rearwardly extending bottom wall 128 . As best shown in FIG.
- bottom wall 128 has a pair of slots 130 for receiving the shanks of a pair of shoulder bolts 132 that can be tightened into a pair of upwardly facing threaded apertures in apron 50 of engine mount 32 of deck 4 .
- shoulder bolts 132 when shoulder bolts 132 are fully tightened, such bolts 132 do not clamp or lock slide 124 in place, but in conjunction with slots 130 serve as guides for the back and forth sliding motion of slide 124 .
- Slide 124 is contained within a U-shaped channel 134 that is a fixed part of apron 50 of engine mount 32 .
- the front wall 136 of channel 134 is spaced away by a relatively short distance from front wall 126 of slide 124 with both front walls 126 and 136 being parallel to one another.
- a threaded adjustment bolt 138 has its head 140 in engagement with front wall 136 of channel 134 with the shank of bolt 138 passing through aligned openings in front walls 126 and 136 of slide 124 and channel 134 , respectively.
- the rear end of the shank of bolt 138 is threaded to receive a threaded nut 142 located behind front wall 126 of slide 124 .
- the required tension in timing belt 106 can be easily set by rotating nut 142 and bolt 138 relative to one another to cause slide 124 to be slid on apron 50 in one direction or the other. If bolt 138 is rotated in one direction relative to nut 142 , the rotation of bolt 138 will pull slide 124 forwardly towards front wall 126 of channel 134 , thereby moving the adjustable idler pulley 122 forwardly to increase the tension in timing belt 106 . Once slide 124 has been moved far enough forwardly to put enough tension on timing belt 106 , the user can stop the relative rotation of bolt 138 and nut 142 to hold idler pulley 122 in its adjusted position.
- a simple leaf spring 144 is interposed between head 140 of bolt 138 and the front side of front wall 126 of channel 134 .
- leaf spring 144 will be bowed out as indicated in FIG. 12 .
- leaf spring 144 will eventually substantially flatten out to become more tightly sandwiched between head 140 of bolt 138 and front wall 126 in channel 134 as shown in FIG. 13 .
- the force required for leaf spring 144 to substantially flatten out i.e.
- leaf spring 144 substantially flatten out, the user knows that the tension in timing belt 106 has been adjusted to the correct level and can stop turning bolt 138 .
- the substantial flattening out of leaf spring 144 thus forms an inexpensive, durable and easily read indicator that informs the user when timing belt tension has been correctly set.
- tunnel 24 is located on the right side of mower deck 4 and extends rearwardly to discharge the clippings into rear collection bag 26 .
- the Applicants have found a way to provide tunnel 24 with sufficient volumetric capacity to handle the volume of grass clippings being generated by the operation of the dual side-by-side cutting blades 16 .
- Each cutting blade 16 is slightly longer than 15′′ in length so that the combined swath cut by both blades is 30′′.
- tunnel 24 still fits atop deck 4 without protruding beyond the sides of shell 34 of deck 4 .
- mower 2 of this invention handles like a conventional smaller sized consumer mower having a rear bagging mode, yet cuts 50% more grass on each swath of mower 2 . This is a significant advance in the art.
- a number of factors help provide mower 2 of this invention with the ability to use a single tunnel 24 to collect the clippings from two cutting blades 16 that provide a significant increase in the width of cut with such single tunnel lying on or inboard of the side edges of the mower deck and with such single tunnel discharging the clippings to the rear of the mower deck.
- engine 14 has been shifted off center to the left of the longitudinal centerline c 1 of deck 4 by a distance of 1.7 inches. This offset is indicated in FIG. 9 by the gap g between centerline c 1 and the axis of the drive shaft of engine 14 which drive shaft axis will be aligned with the center c of opening 44 in the top wall 42 of engine deck 40 .
- This shift of engine 14 to the left of more deck provides more space for a wider tunnel 24 on the right of mower deck 4 .
- blade drive system 18 has been configured so that most of the components thereof are also located on the left side of mower deck 4 to the left of centerline c 1 .
- drive belt 96 that extends to driven pulley 100 , spindle 80 for the left cutting blade 16 and timing pulley 104 for such spindle 80 , the adjustable idler pulley 122 and the adjustable slide 124 that mounts pulley 122 are all on the side of mower deck 4 that is away tunnel 24 .
- the fixed idler pulley 120 and the spindle 80 for the right cutting blade along with timing pulley 102 are located on the right of mower deck 4 to the right of centerline c 1 .
- belt cover 108 is much smaller in a fore and aft direction on the tunnel side of mower deck 4 than on the non-tunnel side of mower deck 4 , thereby allowing tunnel 24 to extend further forwardly on mower deck 4 than would have been the case if drive belt 96 or the idler pulley 122 and slide 124 had been reversed in their positions.
- tunnel 24 progressively increases in height as it extends rearwardly. Moreover, tunnel 24 increases in width as it extends rearwardly as indicated by the inclined innermost sidewall 48 of engine deck 40 . This gets as much volume as possible into tunnel 24 . All of these factors contribute to the use of a single tunnel 24 for discharging grass clippings to the rear in the manner of a typical walk power mower having rear bagging capability, though one or more of the factors could potentially be dropped. The most important of the factors is offsetting the engine somewhat to the non-tunnel side of mower deck 4 to provide more absolute space of tunnel 24 .
- blades 16 could alternatively be positioned in a side-by-side arrangement in which blades 16 are longitudinally staggered to have non-intersecting orbits that still overlap one another in the middle.
- the right side of the orbit of one blade will lie behind or in front of the left side of the orbit of the other blade to ensure that no uncut grass is left in the middle of the swath even though the orbits never cross one another.
- mower 2 of this invention employs a generally conventional height of cut adjustment system that adjusts the height of wheels 6 up and down relative to mower deck 4 to change the height of blades 16 above the ground.
- the height of cut adjustment system that is employed is one that uses at least one pivotal spring arm 146 that pivots about a horizontal pivot axis x relative to a series of notches, detents or openings 148 that are provided on mower deck 4 .
- Spring arm 146 is linked to at least one and possibly more than one of the wheels 6 so that pivotal motion of spring arm 146 about pivot axis x lifts or lowers the axle of the wheel(s) 6 relative to mower deck 4 to move mower deck 4 , and thus cutting blades 16 , upwardly or downwardly relative to ground.
- the spring arm carries an integrally formed locking pin or tab that engages with one of the series of notches, detents or openings to hold the wheel or wheels 6 in an adjusted position.
- spring arm 146 employs a channel 150 on the back thereof, i.e. on that part of spring arm 146 that faces notches, detents or openings 148 .
- a removable insert 151 is provided comprising a locking pin or tab 152 that is formed with and projects from one side of a base 154 .
- Base 154 is shaped to be received closely within the confines of channel 150 on a flat portion 156 of channel 150 .
- An attachment screw 158 is used to releasably attach base 154 of insert 151 to channel 150 of spring arm 146 with locking pin or tab 152 suited to be received in any one of the notches, detents or openings 148 .
- Chute 160 is releasably mounted to mower deck 4 to extend away from side discharge opening 20 and to cause the clippings exiting from side discharge opening 20 to be thrown safely to the side of mower deck 4 .
- Chute 160 is mounted to mower deck 4 after side door 28 is first pivoted upwardly as shown in FIG. 15 .
- Various ways of attaching chute 160 to deck 4 can be used, such as holes or apertures 162 that can be dropped over pins or tabs (not shown) on mower deck 4 . See FIG. 16 in which chute 160 has been pulled away from deck 4 and side door 28 has been removed.
- chute 160 of this invention is U-shaped with a front wall 164 , a top wall 166 , and a rear wall 168 that together form the U-shape. It is obvious that the U-shape provided by chute 160 faces downwardly towards the ground.
- the front wall 164 and the rear wall 168 have been so named because front wall 164 is the first to see clippings that are passing through side discharge opening 20 and rear wall 168 is the last to see such clippings. Put another way, front wall 164 is upstream from rear wall 168 taken with respect to the direction B in which the clippings are circulating within cutting chamber 60 past side discharge opening 20 .
- chute 160 of this invention includes a flow cutoff baffle 170 that is located substantially along rear wall 168 of chute 160 .
- Baffle 170 has an inner end 172 that protrudes inwardly from an inboard side of chute 160 to stick inwardly through side discharge opening 20 when chute 160 is attached to deck 4 .
- Baffle 170 has an outer end 174 that is releasably attached by a pair of screws 177 to chute 160 . See FIG. 18 .
- baffle 170 protrudes into the path B of the clippings circulating within channel 63 of cutting chamber 60 .
- Inner end 172 of baffle 170 is also obviously above the plane of rotation of blades 16 to avoid being struck by the blade 16 that is nearest to baffle 170 as inner end 172 of baffle 170 partially overlies the orbit of that nearest blade.
- the inner end 172 of baffle 170 has a substantially front face 176 that serves to intercept the clippings and assist the clippings into passing through side discharge opening 20 into chute 160 . This helps improve side discharge efficiency by greatly decreasing the amount of clippings that might miss side discharge opening 20 to keep circulating within cutting chamber 60 . This increase in efficiency helps improve how far the clippings are thrown to the side from deck 4 .
- Baffle 170 is formed as an integral one-piece plastic part.
- Baffle 172 has a three dimensional shape with inner end 172 having a rear face 178 behind front face 176 with a number of bracing ribs 180 extending between the two faces 176 and 180 . See FIG. 16 .
- outer end 174 of baffle 170 has a pair of ribs 182 arranged in a V-shape that further brace baffle 170 against the top and rear walls 166 and 168 of chute 160 .
- This structure helps baffle 170 resist impacts from any foreign objects, such as rocks or other debris, which might be picked up and carried with the clippings to resist being damaged or bent from such impact. However, should baffle 170 be damaged, it is easily replaceable as it is releasably attached to chute 160 .
- Chute 160 of this invention incorporates flow cutoff baffle 170 thereon so that it is in place only when chute 160 is in place after the user has selected the side discharge mode of operation. If chute 160 is taken off and side door 28 is closed to block side discharge opening 20 , baffle 170 is gone as it is not a permanent part of mower deck 4 . Thus, baffle 170 does not hinder or prevent operation of mower 2 it the mulching or rear bagging modes of operation, as it would had baffle 170 been made part of mower deck 4 instead of being carried on chute 160 .
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Abstract
A walk power mower has a mower deck that encloses a pair of rotary cutting blades with the grass clippings from the blades being discharged through a rearwardly extending grass discharge tunnel in a rear bagging mode of operation. The blades are powered by a timed drive system that is carried by a horizontal apron that is part of a cast aluminum engine mount. The engine mount and the apron are bolted to a stamped steel deck shell that forms the cutting chamber in which the blades rotate. The mower has a side discharge mode in which a side discharge chute is releasably mounted over a side discharge opening. The chute carries a flow cutoff baffle having an inwardly protruding inner end that sticks through the side discharge opening to intercept and direct the clippings out through the side discharge opening and through the chute in the side discharge mode.
Description
- This application is a division of application Ser. No. 13/312,433 filed Dec. 6, 2011.
- This invention relates to mowers and, more particularly, to walk power mowers which are operated by a user who walks on the ground behind the mower when operating the mower.
- Walk power mowers are well known for cutting grass. Such mowers are characterized by a relatively small mower deck, typically one that provides a 21″ cutting width, which is supported by four wheels at the corners of the deck for rolling over the ground. The underside of the deck typically includes a substantially circular cutting chamber. The cutting chamber houses a single rotary cutting blade that rotates about a substantially vertical axis in a substantially horizontal cutting plane. A small internal combustion engine or electric motor is laterally centered on top of the mower deck. The shaft of the engine or motor extends down through the top wall of the mower deck into the cutting chamber to be attached to the cutting blade.
- Many mowers of this type have a rear bagging mode in which the grass clippings are thrown into and collected within a bag that is releasably fastened to the rear of the mower deck. In such mowers, the cutting chamber has a rearwardly extending discharge tunnel that progressively increases in height as it extends rearwardly to accommodate the grass clippings. The tunnel ends in a rearwardly facing grass discharge opening that is mated to the open mouth of the bag. Desirably, the tunnel and the bag are positioned so that they do not extend beyond the lateral sides of the deck to allow the mower to cut close to the sides of various structures, e.g. to cut all the way up to a flower bed, retaining wall or the like.
- Mowers of the type noted above have conventionally been restricted to single bladed mowers having the aforementioned small cutting width. If the cutting width could be dramatically increased from say 21″ to 30″ or so, the user could cut 50% more grass on each cutting swath of the mower. This would greatly increase productivity by decreasing the amount of time needed to mow a particular area of grass. However, such a larger walk power mower could be stored in one's garage in much less space than that required for storing a riding mower. Thus, the ease of storage and greater productivity offered by a wide swath, walk power mower would be an attractive and less expensive alternative to a riding mower.
- Attempts have been made to provide larger walk power mowers having a pair of side-by-side cutting blades that offer a wider cutting swath than a single bladed mower. However, such mowers have not provided a true rear bagging capability in the same manner as that provided by a single bladed mower with a rearwardly extending discharge tunnel. Such dual bladed mowers typically have discharged the grass clippings to the sides of the mower deck. The Applicants believe this to be the result of a belief in the art that the increased volume of grass clippings resulting from the operation of two blades could not be accommodated in a single rearwardly extending tunnel given the need to position the engine over the center of the deck in front of the bag.
- Another difficulty posed by dual bladed mowers is the orientation of the cutting blades relative to one another. The two cutting blades are normally positioned in one of two different ways: 1.) the blades can be set generally side-by-side relative to one another but staggered fore and aft relative to one another so that their cutting orbits overlap one another in the middle of the deck but do not intersect with one another, or 2.) the blades can be set entirely or directly side-by-side relative to one another with no longitudinal staggering and with their cutting orbits intersecting with one another. With the latter approach, it is necessary to time the rotation of the dual blades relative to one another using a timing belt so that the dual blades do not hit one another as they rotate. A timing belt system requires fairly high belt tension to avoid the belt from coming off the cogged timing pulleys. Such high belt tension can warp or deform the fairly light mower decks typically used in these types of mowers.
- Accordingly, it would be an advance in the art to provide a dual bladed walk power mower that would offer a true rear bagging mode and yet be durable and affordable.
- One aspect of this invention relates to a walk power mower which comprises a mower deck having a downwardly facing cutting chamber which encloses a pair of rotary cutting blades. The blades are arranged substantially directly side-by-side relative to one another and rotate in a substantially common plane with the orbits of the blades intersecting in a central portion of the cutting chamber to collectively cut an unbroken swath of grass that is wider than a width of either blade alone. A plurality of ground engaging wheels is carried on the mower deck for supporting the mower deck for rolling over the ground. An upwardly and rearwardly extending handle assembly is carried on the mower deck to permit an operator who is walking on the ground behind the mower deck to grip the handle assembly to guide and manipulate the mower deck during movement of the mower deck. A power source is carried atop the mower deck for rotating the cutting blades. A drive system is operatively connected to the power source and to the blades for rotating the blades in a timed, out of phase relationship relative to one another so that the blades do not hit one another as they rotate. The timed drive system includes a pair of vertical spindles carrying the blades. The mower deck comprises a mount for the power source. The mount has a U-shaped, downwardly facing mounting deck having a top wall to which the power source is fixed. The top wall has an opening for receiving a vertically extending drive shaft of the power source with the drive shaft having a lower end that terminates below the top wall of the mounting deck. The mount further has a substantially horizontal apron that extends forwardly from the mounting deck with the apron having a pair of laterally spaced openings for receiving the spindles of the drive system. The mount including the mounting deck and apron is cast as an integral, one-piece part from metal. The mower deck further comprises a deck shell that includes a top wall having a downwardly extending peripheral sidewall that forms the cutting chamber. The deck shell has a pair of laterally spaced spindle receiving openings that are aligned beneath the openings in the apron of the mount when the deck shell is fixed to the mount. The deck shell is stamped out of metal as an integral, one-piece part. The mount and the deck shell are fixed to one another. Finally, the timed drive system is supported by the apron of the mount so that forces arising from operation of the timed drive system are borne by the mount to help prevent any warping or deformation in the deck shell.
- This invention will be described more completely in the following Detailed Description, when taken in conjunction with the following drawings, in which like reference numerals refer to like elements throughout.
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FIG. 1 is a front perspective view of one embodiment of a mower according to this invention, particularly illustrating the mower in a mulching mode; -
FIG. 2 is a top plan view of the mower ofFIG. 1 ; -
FIG. 3 is a side elevational view of the mower ofFIG. 1 ; -
FIG. 4 is a rear perspective view of the mower ofFIG. 1 ; -
FIG. 5 is a perspective view of a portion of the underside of the mower ofFIG. 1 , -
FIG. 6 is a perspective view of the mower ofFIG. 1 , but showing the mower with the side discharge opening having been opened with the side discharge chute in place, and also showing the rear bag having been installed at the rear of the mower in mating engagement with the rearwardly extending grass discharge tunnel, thereby illustrating both the side discharge and rear bagging modes of the mower; -
FIG. 7 is a front perspective view of the components of the mower deck, namely of the engine mount, the deck shell and the deck shroud, that form the mower deck of the mower ofFIG. 1 , particularly illustrating the components in an exploded form; -
FIG. 8 is a rear perspective view showing the deck ofFIG. 7 with the deck shroud having been exploded away from the assembled engine mount and deck shell; -
FIG. 9 is a top plan view of the mower deck ofFIG. 7 ; -
FIG. 10 is a top plan view of a portion of the mower ofFIG. 1 , particularly illustrating the blade drive system comprising the dual cogged drive pulleys and the timing belt entrained around such drive pulleys; -
FIG. 11 is a perspective view of the blade drive system ofFIG. 10 , but showing one of the cogged drive pulleys in exploded form with the timing belt having been removed; -
FIGS. 12 and 13 are top plan views illustrating the operation of a belt tensioning mechanism that is part of the blade drive system ofFIG. 10 ; -
FIG. 14 is an exploded perspective view of a portion of a height of cut adjustment device for the mower ofFIG. 1 , particularly illustrating a removable insert forming a locking pin used on a locking spring arm in the height of cut adjustment device; -
FIG. 15 is a front perspective view of the deck shell of the mower deck of the mower ofFIG. 1 , particularly illustrating a side discharge chute having been installed on a side discharge opening on the deck shell; -
FIG. 16 is an enlarged perspective view of the side discharge chute ofFIG. 15 , particularly illustrating the chute in an exploded orientation relative to the side discharge opening with a flow cutoff baffle being carried on the chute adjacent a rear wall of the chute; -
FIG. 17 is a bottom plan view of the deck shell ofFIG. 15 , particularly illustrating the side discharge chute in place on the deck shell with the flow cutoff baffle extending inwardly through the side discharge opening into a portion of the cutting chamber; -
FIG. 18 is a perspective view of the side discharge chute ofFIG. 15 looking inwardly from an outboard side to an inboard side of the chute; and -
FIG. 19 is a perspective view of the side discharge chute ofFIG. 15 looking outwardly from an inboard side to an outboard side of the chute. - A first embodiment according to this invention of a mower for cutting grass is generally illustrated as 2 herein.
Mower 2 comprises amower deck 4 supported for rolling over the ground by four rotatable,ground engaging wheels 6 carried at the four corners ofdeck 4. AU-shaped handle assembly 8 is attached tomower deck 4 comprising a pair of upwardly and rearwardly extendinghandle tubes 10 which are connected together at their upper ends by a substantiallyhorizontal cross bar 12.Cross bar 12 is wide enough to allow a user who stands on the ground behindmower 2 to grip and holdcross bar 12 with both hands.Cross bar 12 can optionally slide up and down onhandle tubes 10 to vary the ground speed ofmower 2 as disclosed in the assignee's U.S. Pat. No. 6,082,083, which is hereby incorporated by reference. - A power source comprising an
internal combustion engine 14 is mounted atopdeck 4.Engine 14 powers a transmission (not shown) for propelling therear wheels 6 ofmower 2 to causemower 2 to be self-propelled.Engine 14 also powers a pair ofgrass cutting blades 16 through ablade drive system 18. Any suitable transmission or wheel drive system could be used onmower 2 and need not be further discussed herein. However,blade drive system 18 comprises one aspect of this invention and will thus be described in more detail hereafter. -
Mower 2 operates either in a mulching mode, a side discharge mode, or a rear bagging mode. In the mulching mode, the grass clippings are confined withindeck 4 until the clippings are forced or fall downwardly through anopen bottom 66 ofdeck 4. In the side discharge mode, aside discharge opening 20 is open to allow the clippings to be thrown frommower 2 to one side ofdeck 4. Finally, in the rear bagging mode, a rear discharge opening 22 formed by the rear end of a rearwardly extendinggrass discharge tunnel 24 is open. This allows the clippings to be thrown throughtunnel 24 and out through discharge opening 22 into a space that is laterally positioned between lower portions ofhandle tubes 10 when viewed from above as indicated by the tunnel discharge arrow S inFIG. 2 . The clippings discharged fromtunnel 24 are received in agrass collection bag 26 that has a mouth mated withrear discharge opening 22. As shown inFIG. 6 ,bag 26 extends substantially straight back in a rearward direction frommower deck 4 to terminate in arear end 27 that lies beneath upper portions ofhandle tubes 10. - The user configures
mower 2 for operation at any given time in only one of the three possible modes of operation.FIGS. 1-5 depictmower 2 configured for operation in the mulching mode. In the mulching mode,side discharge opening 20 is blocked by apivotal side door 28 andtunnel 24 is blocked or closed by a pivotalrear door 30.Tunnel 24 can be additionally blocked by a removable mulch plug (not shown) that is inserted intotunnel 24 in the mulching mode.FIG. 6 showsside door 28 having been pivoted upwardly to open side discharge opening 20 with aside discharge chute 160 having been installed onside discharge opening 20. For convenience,FIG. 6 also showsrear door 30 having been pivoted upwardly to opentunnel 24 withbag 26 being mated totunnel 24. WhileFIG. 6 has been used to showmower 2 as it would appear in both the side discharge and the rear bagging modes, it should be understood that both of these modes would not be used simultaneously, i.e. the user would pick either the side discharge mode or the rear bagging mode. - Referring now to
FIGS. 7-10 , three primary components comprisedeck 4, i.e. anengine mount 32, adeck shell 34, and arear deck shroud 36. These components are screwed or bolted together to formdeck 4. As shown inFIGS. 1-5 ,deck 4 also includes afront bracket 38 that is secured or attached, e.g. bolted, to the front ofdeck shell 34.Front bracket 38 is used for mounting thefront wheels 6 ofmower 2 todeck 4. Whilefront bracket 38 also is part ofdeck 4, it need not be described in as much detail asengine mount 32,deck shell 34 andrear shroud 36. - Turning first to
FIG. 7 ,engine mount 32 is formed with a downwardly facing,U-shaped engine deck 40 having atop wall 42 that is provided with a largecircular opening 44 for receiving the drive shaft (not shown) ofengine 14.Engine 14 is mounted atop thetop wall 42 ofengine deck 40 over the driveshaft receiving opening 44 by being bolted totop wall 42 at various locations. In addition,engine mount 32 is formed with an upwardly facingU-shaped trough 46 immediately contiguous to aninnermost sidewall 48 ofengine deck 40.Innermost sidewall 48 ofengine deck 40 also does double duty by serving as the innermost sidewall oftrough 46. A substantially horizontalfront apron 50 extends forwardly from the front ofengine deck 40 andtrough 46. Preferably,engine deck 40,trough 46 andapron 50 ofengine mount 32 are collectively formed as a single, one-piece cast aluminum part having a wall thickness of approximately 140 thousandths of an inch (0.140″) to provide great strength. - As shown in
FIG. 7 ,apron 50 ofengine mount 32 includes two relatively smallcircular openings 52 for receiving the upper ends of a pair ofspindles 80 that mount cuttingblades 16. Eachopening 52 is surrounded by four threadedapertures 56. As will be explained in more detail hereafter,fasteners 86 will be tightened intoapertures 56 to attachengine mount 32 todeck shell 34 and to a pair of bearinghousings 82 which carryspindles 80. -
Deck shell 34 is the part ofdeck 4 that forms a cuttingchamber 60 which enclosesblades 16.Shell 34 comprises an integral, one-piece stamped steel part having a wall thickness that is approximately one third thinner than the wall thickness of the castaluminum engine mount 32, i.e. a wall thickness of approximately 90 thousandths of an inch (0.090″) forshell 34.Shell 34 has atop wall 62 that is bounded by a peripheral, downwardly extendingsidewall 64 to form cuttingchamber 60. Cuttingchamber 60 has an open bottom 66 that faces downwardly towards the ground. SeeFIG. 8 . Acircumferential lip 67 extends a short distance outwardly from a lower edge ofsidewall 64. -
Sidewall 64 ofshell 34 is interrupted in two places to form side discharge opening 20 as well as arear outlet 68. SeeFIGS. 15 and 16 . A portion ofoutlet 68 is formed insidewall 64 ofshell 34 and a portion ofoutlet 68 is formed intop wall 62 ofshell 34.Outlet 68 is mated to the inlet or entrance totunnel 24 so that clippings generated within cuttingchamber 60 pass upwardly from cuttingchamber 60 ofshell 34 throughoutlet 68 into the front end oftunnel 24. In addition,shell 34 includes a shallow recessedcentral portion 70 having a depth approximately equal to the wall thickness ofapron 50.Central portion 70 includes twocircular openings 72 that correspond in size, shape and relative location tocircular openings 52 inapron 50 ofengine mount 32.Circular openings 72 are each surrounded by foursmooth apertures 76. -
Apron 50 ofengine mount 32 can be nested down within recessedcentral portion 70 whenengine mount 32 andshell 34 are assembled together withcircular openings apertures engine mount 32 wraps closely around the rear face ofperipheral sidewall 64 with the front ends oflower edges 73 of thesidewalls 74 ofengine mount 32 engaging at two spaced locations atop the rear side oflip 67 ofshell 34. SeeFIGS. 7 and 8 . Apertures are provided inlip 67 at these locations that are aligned with threadedbosses 77 onsidewalls 74 to provide a pair of attachment points betweenengine mount 32 andshell 34 that are in addition to the eight other attachment points provided collectively by the superimposedapertures - As best shown in
FIGS. 7 and 8 ,deck shroud 36 is L-shaped having a U-shaped, downwardly facingchannel 78 along one side ofshroud 36.Channel 78 inshroud 36 is substantially the same size and shape astrough 46 inengine mount 32. Whenshroud 36 is screwed or bolted toengine mount 32,trough 46 inengine mount 32 andchannel 78 inshroud 36 together formtunnel 24.Trough 46 forms the lower portion oftunnel 24 andchannel 78 forms the upper portion oftunnel 24.Shroud 36 preferably comprises an integral, one-piece molded plastic part. - Referring now to
FIGS. 5 and 10 , twospindles 80 extend into cuttingchamber 60 withblades 16 being bolted to bottom ends ofspindles 80.Spindles 80 are rotatably supported by bearings (not shown) contained within bearinghousings 82. Each bearinghousing 82 is cast from metal as a single piece. In addition, each bearinghousing 82 has four outwardly extending mountingarms 84 containing apertures at the ends ofarms 84. The apertures at the end ofarms 84 have the same spacing and orientation asapertures top wall 62 ofshell 34 and inapron 50 ofengine mount 32. - In assembling
deck 4 from its primary components, bearinghousings 82 are installed in cuttingchamber 60 ofshell 34 witharms 84 abutting the underside oftop wall 62 ofshell 34.Engine mount 32 is laid ontop wall 62 ofshell 34 withapron 50 being received in recessedportion 70. Threadedfasteners 86, such as machine bolts, are then passed up through the apertures at the ends ofarms 84 on each bearinghousing 82 and through the alignedapertures apertures 56 onengine mount 32. Whenfasteners 86 are tightened intoapertures 56,spindles 80 carried in bearinghousings 82 are each securely bolted to the relatively thick, castaluminum apron 50 ofengine mount 32 with the stampedsteel top wall 62 ofshell 34 being tightly sandwiched betweenapron 50 and bearing housings 82. This provides a very strong and durable structure fordeck 4 that is sufficient for withstanding relatively high tension in the drive belt used topower spindles 80 without warpingdeck 4. This strength and durability is further enhanced by the twoadditional fasteners 88 that boltlower edges 73 ofsidewalls 74 ofengine mount 32 tolip 67 ofshell 34. SeeFIG. 5 . -
Blades 16 are arranged side-by-side relative to one another with the orbits of the tips ofblades 16 intersecting one another along the middle ofshell 34. As best shown inFIG. 8 ,blades 16 are oriented at right angles relative to one another which orthogonal orientation is maintained byblade drive system 18 so thatblades 16 do not hit one another as they rotate. Referring toFIG. 5 ,blade drive system 18 rotates eachblade 16 in the same rotational direction indicated by the arrow A. Thus, the clippings cut byblades 16 circulate in a circumferential path inside cuttingchamber 60 defined by a shallow downwardly facingchannel 63 intop wall 62 formed betweensidewall 64 and recessedcentral portion 70. The circumferential path of the circulating clippings is indicated by the arrows B inFIG. 5 which show that such path is directed first towardsside discharge opening 20 and then totunnel 24 should side discharge opening 20 be closed. - There are no interior flow control baffles used in the circumferential path B that serve to separate one
blade 16 from the other. This permits the clippings generated by the action of bothblades 16 to smoothly merge into one common stream. The only baffle of any type used in cuttingchamber 60 is a rear generally V-shapedbaffle 90 at the back of cuttingchamber 60 having an apex 92 that faces towards the front of cuttingchamber 60. -
FIGS. 10 and 11 depictblade drive system 18 that powers thedual cutting blades 16 ofmower 2 of this invention.Engine 14 has been removed fromFIGS. 10 and 11 for the sake of clarity. However, twodrive belts engine 14 are still shown inFIGS. 10 and 11 . As shown inFIG. 10 ,drive belt 94 extends to the rear ofengine deck 40 for powering the transmission (not shown) that drivesrear wheels 6. As shown inFIG. 11 ,drive belt 96 extends to the front ofengine deck 40 outwardly through an access opening 98 in the front wall ofengine deck 40. As further shown inFIG. 11 ,drive belt 96 is entrained around a drivenpulley 100 on the top ofleft spindle 80 to rotate the left spindle and thereby rotateleft cutting blade 16. When referring to the left or right spindles or cutting blades, the adjectives left and right are used with reference to a user who is standing behindmower 2 looking forwardly. - A cogged timing
pulley 102 is located on theright spindle 80 that is bolted to theright cutting blade 16. An identical coggedpulley 104 is located beneath the drivenpulley 100 on theleft spindle 80 for theleft cutting blade 16. Both coggedpulleys spindles 80 and lie substantially immediately aboveapron 50 ofengine mount 32. Acogged timing belt 106 passes around pulleys 102 and 104 to maintain the necessary rotational timing betweenspindles 80. Remember thatblades 16 are to be disposed offset relative to one another by 90°. It is coggedtiming belt 106 in engagement withcogged pulleys blades 16 do not strike one another even though their orbits intersect. - A
belt cover 108 normally coversblade drive system 18 including both timingpulleys timing belt 106.Belt cover 108 is shown in placeFIGS. 1-4 and 6 but has been removed fromFIGS. 10 and 11 for the sake of clarity.Belt cover 108 is usually held in place byreleasable fasteners 110 as shown inFIG. 2 that can be screwed into upwardly extending threadedbosses 112 as shown inFIG. 7 that are provided onengine mount 32. - In initially assembling
mower 2 or whenevertiming belt 106 needs to be replaced, a unique and easy to uselocator system 114 is provided for locating timing pulleys 102 and 104 in their correct positions. As best shown inFIG. 11 ,locator system 114 comprises aguide hole 116 located inapron 50 ofengine mount 32 adjacent each of thecircular openings 42 inapron 50 through which spindles 80 extend.Guide hole 116 for opening 52 that receives theleft spindle 80 is located at a 6 o'clock position whileguide hole 116 for opening 52 that receives theright spindle 80 is located at a 9 o'clock position. Thus, the twoguide holes 116 are offset from one another by 90°. Guide holes 116 do not extend through into cuttingchamber 60 as they are blocked by an underlying portion ofdeck shell 34 or alternatively because they are formed only partially through the thickness ofapron 50. - Each timing
pulley hole 118 located on a radius that overlies guide holes 116. In addition, timing pulleys 102 and 104 andspindles 80 are configured so that they pulleys 102 and 104 can be installed onspindles 80 in only one orientation. Thus, the user can align throughhole 118 in timingpulley 102 withguide hole 116 adjacent the opening for theright spindle 80 and then drop a pin or rod (not shown) through the alignedholes pulley 102 in exactly the correct position to hold theright cutting blade 16 at the correct orientation within cuttingchamber 60. The same thing can be done with throughhole 118 for timingpulley 104 for theleft spindle 80 and itscorresponding guide hole 116. - When this procedure is followed, both timing
pulleys blades 16 are correctly offset 90° from one another. This avoids the user having to continually look beneath top 62 wall ofshell 34 to manually and visually observe the twoblades 16 and attempt to position them by hand at the required offset. The alignment of throughholes 118 in timingpulleys deck 4 and the use of a temporarily inserted bolt though the aligned sets of holes automatically does the same thing. The user can then installtiming belt 106 around the timing pulleys 102 and 104 with certainty thatblades 16 are in their correct offset positions. After timingbelt 106 has been so installed, the bolts used to temporarily hold timingpulleys holes 118 in timingpulleys - Timing
belt 106 is appropriately tensioned by passing around twoidler pulleys timing belt 106.Idler pulley 120 rotates around a fixed vertical pivot axis 121 ondeck 4. However, the otheridler pulley 122 rotates around avertical pivot axis 123 that is carried on anadjustable slide 124.Slide 124 is L-shaped having a verticalfront wall 126 and a rearwardly extendingbottom wall 128. As best shown inFIG. 10 ,bottom wall 128 has a pair ofslots 130 for receiving the shanks of a pair ofshoulder bolts 132 that can be tightened into a pair of upwardly facing threaded apertures inapron 50 ofengine mount 32 ofdeck 4. However, whenshoulder bolts 132 are fully tightened,such bolts 132 do not clamp orlock slide 124 in place, but in conjunction withslots 130 serve as guides for the back and forth sliding motion ofslide 124. -
Slide 124 is contained within aU-shaped channel 134 that is a fixed part ofapron 50 ofengine mount 32. Thefront wall 136 ofchannel 134 is spaced away by a relatively short distance fromfront wall 126 ofslide 124 with bothfront walls adjustment bolt 138 has itshead 140 in engagement withfront wall 136 ofchannel 134 with the shank ofbolt 138 passing through aligned openings infront walls slide 124 andchannel 134, respectively. The rear end of the shank ofbolt 138 is threaded to receive a threadednut 142 located behindfront wall 126 ofslide 124. - The required tension in
timing belt 106 can be easily set by rotatingnut 142 and bolt 138 relative to one another to causeslide 124 to be slid onapron 50 in one direction or the other. Ifbolt 138 is rotated in one direction relative tonut 142, the rotation ofbolt 138 will pull slide 124 forwardly towardsfront wall 126 ofchannel 134, thereby moving the adjustableidler pulley 122 forwardly to increase the tension intiming belt 106. Onceslide 124 has been moved far enough forwardly to put enough tension ontiming belt 106, the user can stop the relative rotation ofbolt 138 andnut 142 to holdidler pulley 122 in its adjusted position. All of this can be done from above and from the front ofdeck 4 oncebelt cover 108 is temporarily removed sincehead 140 ofbolt 138 andnut 142 are exposed to and easily reached by the user from above and from the front ofdeck 4. This makes setting the tension intiming belt 106 extremely easy. - Referring now to
FIGS. 12 and 13 , asimple leaf spring 144 is interposed betweenhead 140 ofbolt 138 and the front side offront wall 126 ofchannel 134. When the tension intiming belt 106 is too loose withslide 124 being disposed too far to the rear inchannel 134,leaf spring 144 will be bowed out as indicated inFIG. 12 . However, as the user turnsbolt 138 to drawslide 124 towards the front to increase the tension intiming belt 106,leaf spring 144 will eventually substantially flatten out to become more tightly sandwiched betweenhead 140 ofbolt 138 andfront wall 126 inchannel 134 as shown inFIG. 13 . The force required forleaf spring 144 to substantially flatten out (i.e. being within a range of from 0.010″ to 0.030″ of wall 126) is chosen to correspond to the moment in time when the tension ontiming belt 106 reaches the desired level. Thus, once the user seesleaf spring 144 substantially flatten out, the user knows that the tension intiming belt 106 has been adjusted to the correct level and can stop turningbolt 138. The substantial flattening out ofleaf spring 144 thus forms an inexpensive, durable and easily read indicator that informs the user when timing belt tension has been correctly set. - Referring now to
FIGS. 2 and 6 ,tunnel 24 is located on the right side ofmower deck 4 and extends rearwardly to discharge the clippings intorear collection bag 26. The Applicants have found a way to providetunnel 24 with sufficient volumetric capacity to handle the volume of grass clippings being generated by the operation of the dual side-by-side cutting blades 16. Eachcutting blade 16 is slightly longer than 15″ in length so that the combined swath cut by both blades is 30″. Yet,tunnel 24 still fits atopdeck 4 without protruding beyond the sides ofshell 34 ofdeck 4. Thus, the sides ofdeck 4 can still closely abut up to obstacles, such as the edges of a flower bed, since the wheels ofmower 2 are also inset from the extreme outermost edges of the sides ofdeck 4. Thus,mower 2 of this invention handles like a conventional smaller sized consumer mower having a rear bagging mode, yet cuts 50% more grass on each swath ofmower 2. This is a significant advance in the art. - A number of factors help provide
mower 2 of this invention with the ability to use asingle tunnel 24 to collect the clippings from two cuttingblades 16 that provide a significant increase in the width of cut with such single tunnel lying on or inboard of the side edges of the mower deck and with such single tunnel discharging the clippings to the rear of the mower deck. First, as best shown inFIG. 9 ,engine 14 has been shifted off center to the left of the longitudinal centerline c1 ofdeck 4 by a distance of 1.7 inches. This offset is indicated inFIG. 9 by the gap g between centerline c1 and the axis of the drive shaft ofengine 14 which drive shaft axis will be aligned with the center c of opening 44 in thetop wall 42 ofengine deck 40. This shift ofengine 14 to the left of more deck provides more space for awider tunnel 24 on the right ofmower deck 4. - Second, as also shown in
FIG. 9 as well asFIGS. 10 and 11 ,blade drive system 18 has been configured so that most of the components thereof are also located on the left side ofmower deck 4 to the left of centerline c1. For example,drive belt 96 that extends to drivenpulley 100,spindle 80 for theleft cutting blade 16 and timingpulley 104 forsuch spindle 80, the adjustableidler pulley 122 and theadjustable slide 124 that mountspulley 122 are all on the side ofmower deck 4 that is awaytunnel 24. Only, the fixedidler pulley 120 and thespindle 80 for the right cutting blade along with timingpulley 102 are located on the right ofmower deck 4 to the right of centerline c1. This minimizes the space taken up on the right or tunnel side ofmower deck 4 byblade drive system 18. Thus, as shown inFIG. 2 ,belt cover 108 is much smaller in a fore and aft direction on the tunnel side ofmower deck 4 than on the non-tunnel side ofmower deck 4, thereby allowingtunnel 24 to extend further forwardly onmower deck 4 than would have been the case ifdrive belt 96 or theidler pulley 122 and slide 124 had been reversed in their positions. - Thirdly, as best shown in
FIG. 3 ,tunnel 24 progressively increases in height as it extends rearwardly. Moreover,tunnel 24 increases in width as it extends rearwardly as indicated by the inclinedinnermost sidewall 48 ofengine deck 40. This gets as much volume as possible intotunnel 24. All of these factors contribute to the use of asingle tunnel 24 for discharging grass clippings to the rear in the manner of a typical walk power mower having rear bagging capability, though one or more of the factors could potentially be dropped. The most important of the factors is offsetting the engine somewhat to the non-tunnel side ofmower deck 4 to provide more absolute space oftunnel 24. - While use of a
single tunnel 24 has been described above in an embodiment in which two side-by-side cutting blades are positioned to have intersecting orbits,blades 16 could alternatively be positioned in a side-by-side arrangement in whichblades 16 are longitudinally staggered to have non-intersecting orbits that still overlap one another in the middle. In this alternative arrangement, the right side of the orbit of one blade will lie behind or in front of the left side of the orbit of the other blade to ensure that no uncut grass is left in the middle of the swath even though the orbits never cross one another. The factors noted above contributing to the use of a single, rearwardly extendinggrass discharge tunnel 24 on a mower could still be employed on a mower having this alternative arrangement of side-by-side cutting blades 16. However, the alternative arrangement is slightly less preferred than the embodiment specifically described herein as it increases the front to back length ofmower deck 4. - Referring now to
FIG. 14 ,mower 2 of this invention employs a generally conventional height of cut adjustment system that adjusts the height ofwheels 6 up and down relative tomower deck 4 to change the height ofblades 16 above the ground. The height of cut adjustment system that is employed is one that uses at least onepivotal spring arm 146 that pivots about a horizontal pivot axis x relative to a series of notches, detents oropenings 148 that are provided onmower deck 4.Spring arm 146 is linked to at least one and possibly more than one of thewheels 6 so that pivotal motion ofspring arm 146 about pivot axis x lifts or lowers the axle of the wheel(s) 6 relative tomower deck 4 to movemower deck 4, and thus cuttingblades 16, upwardly or downwardly relative to ground. In prior art systems of this kind, the spring arm carries an integrally formed locking pin or tab that engages with one of the series of notches, detents or openings to hold the wheel orwheels 6 in an adjusted position. - As shown in
FIG. 14 ,spring arm 146 according to this invention employs achannel 150 on the back thereof, i.e. on that part ofspring arm 146 that faces notches, detents oropenings 148. Aremovable insert 151 is provided comprising a locking pin ortab 152 that is formed with and projects from one side of abase 154.Base 154 is shaped to be received closely within the confines ofchannel 150 on aflat portion 156 ofchannel 150. Anattachment screw 158 is used to releasably attachbase 154 ofinsert 151 to channel 150 ofspring arm 146 with locking pin ortab 152 suited to be received in any one of the notches, detents oropenings 148. Thus, ifmower 2 hits an obstacle and a shear load is imposed on locking pin ortab 152 that would tend to break off pin ortab 152, the user need only replaceinsert 151 rather than replacing theentire spring arm 146. This is advantageous as it will be significantly less costly and easier to replaceinsert 151 instead of having to replace thecomplete spring arm 146. - Finally, turning to
FIGS. 15-19 , an improvedside discharge chute 160 is shown for use withside discharge opening 20.Chute 160 is releasably mounted tomower deck 4 to extend away fromside discharge opening 20 and to cause the clippings exiting from side discharge opening 20 to be thrown safely to the side ofmower deck 4.Chute 160 is mounted tomower deck 4 afterside door 28 is first pivoted upwardly as shown inFIG. 15 . Various ways of attachingchute 160 todeck 4 can be used, such as holes orapertures 162 that can be dropped over pins or tabs (not shown) onmower deck 4. SeeFIG. 16 in whichchute 160 has been pulled away fromdeck 4 andside door 28 has been removed. - As is typical of side discharge chutes,
chute 160 of this invention is U-shaped with afront wall 164, atop wall 166, and arear wall 168 that together form the U-shape. It is obvious that the U-shape provided bychute 160 faces downwardly towards the ground. Thefront wall 164 and therear wall 168 have been so named becausefront wall 164 is the first to see clippings that are passing throughside discharge opening 20 andrear wall 168 is the last to see such clippings. Put another way,front wall 164 is upstream fromrear wall 168 taken with respect to the direction B in which the clippings are circulating within cuttingchamber 60 pastside discharge opening 20. - Referring more particularly to
FIGS. 15-19 ,chute 160 of this invention includes aflow cutoff baffle 170 that is located substantially alongrear wall 168 ofchute 160.Baffle 170 has aninner end 172 that protrudes inwardly from an inboard side ofchute 160 to stick inwardly throughside discharge opening 20 whenchute 160 is attached todeck 4.Baffle 170 has anouter end 174 that is releasably attached by a pair ofscrews 177 tochute 160. SeeFIG. 18 . - As best shown in
FIG. 17 , whenchute 160 is in place,inner end 172 ofbaffle 170 protrudes into the path B of the clippings circulating withinchannel 63 of cuttingchamber 60.Inner end 172 ofbaffle 170 is also obviously above the plane of rotation ofblades 16 to avoid being struck by theblade 16 that is nearest to baffle 170 asinner end 172 ofbaffle 170 partially overlies the orbit of that nearest blade. Theinner end 172 ofbaffle 170 has a substantiallyfront face 176 that serves to intercept the clippings and assist the clippings into passing through side discharge opening 20 intochute 160. This helps improve side discharge efficiency by greatly decreasing the amount of clippings that might miss side discharge opening 20 to keep circulating within cuttingchamber 60. This increase in efficiency helps improve how far the clippings are thrown to the side fromdeck 4. -
Baffle 170 is formed as an integral one-piece plastic part.Baffle 172 has a three dimensional shape withinner end 172 having arear face 178 behindfront face 176 with a number of bracingribs 180 extending between the two faces 176 and 180. SeeFIG. 16 . In addition,outer end 174 ofbaffle 170 has a pair ofribs 182 arranged in a V-shape thatfurther brace baffle 170 against the top andrear walls chute 160. This structure helps baffle 170 resist impacts from any foreign objects, such as rocks or other debris, which might be picked up and carried with the clippings to resist being damaged or bent from such impact. However, should baffle 170 be damaged, it is easily replaceable as it is releasably attached tochute 160. -
Chute 160 of this invention incorporatesflow cutoff baffle 170 thereon so that it is in place only whenchute 160 is in place after the user has selected the side discharge mode of operation. Ifchute 160 is taken off andside door 28 is closed to blockside discharge opening 20,baffle 170 is gone as it is not a permanent part ofmower deck 4. Thus, baffle 170 does not hinder or prevent operation ofmower 2 it the mulching or rear bagging modes of operation, as it would had baffle 170 been made part ofmower deck 4 instead of being carried onchute 160. - Various modifications of this invention will be apparent to those skilled in the art. While an
internal combustion engine 14 has been shown as the power source herein, other power sources, e.g. an electric motor powered by some source of electrical energy, could be used. Similarly, thepivotal side door 28 used to open and close side discharge opening 20 could be replaced by an installable and removable blocking plate. Rather than using cogged pulleys engaged by a cogged belt, one could use cogged sprockets engaged by a cogged chain in which the cogs are formed by the links in the chain. Thus, the scope of this invention will be limited only by the appended claims.
Claims (5)
1. A walk power mower, which comprises:
(a) a mower deck having a downwardly facing cutting chamber which encloses a pair of rotary cutting blades, wherein the blades are arranged substantially directly side-by-side relative to one another and rotate in a substantially common plane with the orbits of the blades intersecting in a central portion of the cutting chamber to collectively cut an unbroken swath of grass that is wider than a width of either blade alone;
(b) a plurality of ground engaging wheels carried on the mower deck for supporting the mower deck for rolling over the ground;
(c) an upwardly and rearwardly extending handle assembly carried on the mower deck to permit an operator who is walking on the ground behind the mower deck to grip the handle assembly to guide and manipulate the mower deck during movement of the mower deck;
(d) a power source carried atop the mower deck for rotating the cutting blades;
(e) a drive system operatively connected to the power source and to the blades for rotating the blades in a timed, out of phase relationship relative to one another so that the blades do not hit one another as they rotate, the timed drive system including a pair of vertical spindles carrying the blades;
(f) wherein the mower deck comprises:
(i) a mount for the power source, the mount having a U-shaped, downwardly facing mounting deck having a top wall to which the power source is fixed, the top wall having an opening for receiving a vertically extending drive shaft of the power source with the drive shaft having a lower end that terminates below the top wall of the mounting deck, the mount further having a substantially horizontal apron that extends forwardly from the mounting deck with the apron having a pair of laterally spaced openings for receiving the spindles of the drive system, wherein the mount including the mounting deck and apron is cast as an integral, one-piece part from metal;
(ii) a deck shell that includes a top wall having a downwardly extending peripheral sidewall that forms the cutting chamber, the deck shell having a pair of laterally spaced spindle receiving openings that are aligned beneath the openings in the apron of the mount when the deck shell is fixed to the mount, the deck shell being stamped out of metal as an integral, one-piece part;
(iii) wherein the mount and the deck shell are fixed to one another; and
(iv) wherein the timed drive system is supported by the apron of the mount so that forces arising from operation of the timed drive system are borne by the mount to help prevent any warping or deformation in the deck shell.
2. The mower of claim 1 , wherein the mount is cast out of aluminum, the deck shell is stamped out of steel, and the mount has a wall thickness that is greater than a wall thickness of the deck shell
3. The mower of claim 1 , wherein the drive system further comprises:
(a) a pair of cogged, circular driven members carried on the spindles for rotating the spindles as the driven members are rotated;
(b) at least one cogged, flexible, and endless drive member entrained around the driven members for rotating the driven members when the at least one endless drive member is driven in a repeating endless loop by the drive shaft of the power source; and
(c) a tensioning mechanism for providing tension in the at least one endless drive member to help keep the drive member engaged with the driven members.
4. The mower of claim 3 , wherein the drive system further includes a locator system for maintaining the position of the blades in the out-of-phase relationship during installation of the endless drive member around the driven members, the locator system comprising:
(a) a pair of vertical, upwardly extending, guide holes in the mower deck located adjacent the pair of driven members, wherein the guide holes underlie the driven members and are disposed in an out-of-phase relationship to the driven members that is the same as the out-of-phase relationship desired for the blades;
(b) a pair of through holes being located in the driven members with one through hole being provided for each driven member, wherein each through hole in each driven member rotates in an orbit that passes over one of the guide holes in the mower deck during each revolution of each driven member, and
(c) a pair of position retaining pins or rods that are used with the through holes in each driven members, wherein a first pin or rod extends downwardly from above into the through hole in one driven member to pass into one of the guide holes, wherein a second pin or rod extends downwardly from above through the through hole in the other driven member to pass into the other one of the guide holes, wherein the pins or rods temporarily hold or maintain the position of the driven members in the out-of-phase relationship that is desired for the blades to allow the endless drive member to be installed around the driven members without the need for an operator to attempt to manually hold the blades in the desired out-of-phase relationship.
5. The mower of claim 3 , wherein the tensioning mechanism comprises:
(a) an elongated threaded adjustment bolt that is rotated to slide an idler member towards and away from the endless drive member to increase or decrease tension in the endless drive member;
(b) a spring inserted between a head of the adjustment bolt and a fixed abutment with the adjustment bolt having a shank that passes through the spring, wherein the spring has an expanded state such that the head of the adjustment bolt is spaced from the fixed abutment when tension in the endless drive member is beneath a desired value, and wherein the spring is calibrated to become fully compressed between the head of the adjustment bolt and the fixed abutment when the adjustment bolt has been rotated sufficiently to achieve the desired tension in the endless drive member, whereby the spring alerts the user that the desired tension has been reached when the user observes the spring becoming substantially fully compressed as the adjustment bolt is turned.
Priority Applications (1)
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US13/845,553 US8701377B1 (en) | 2011-12-06 | 2013-03-18 | Dual bladed walk power mower with timed blade drive system carried on an apron of a power source mount |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US13/312,433 US8539745B2 (en) | 2011-12-06 | 2011-12-06 | Dual bladed walk power mower with rear bagging mode |
US13/845,553 US8701377B1 (en) | 2011-12-06 | 2013-03-18 | Dual bladed walk power mower with timed blade drive system carried on an apron of a power source mount |
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US13/312,433 Division US8539745B2 (en) | 2011-12-06 | 2011-12-06 | Dual bladed walk power mower with rear bagging mode |
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US13/845,530 Active US8857145B2 (en) | 2011-12-06 | 2013-03-18 | Walk power mower with flow cutoff baffle carried by a side discharge chute |
US13/845,553 Active US8701377B1 (en) | 2011-12-06 | 2013-03-18 | Dual bladed walk power mower with timed blade drive system carried on an apron of a power source mount |
US13/845,574 Active US8887480B2 (en) | 2011-12-06 | 2013-03-18 | Walk power mower with height of cut adjustment system having spring arm with replaceable locking pin |
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US13/845,530 Active US8857145B2 (en) | 2011-12-06 | 2013-03-18 | Walk power mower with flow cutoff baffle carried by a side discharge chute |
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US13/845,574 Active US8887480B2 (en) | 2011-12-06 | 2013-03-18 | Walk power mower with height of cut adjustment system having spring arm with replaceable locking pin |
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Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140075913A1 (en) * | 2012-09-18 | 2014-03-20 | Walker Manufacturing, Inc. | Mower Deck Extension |
JP2014060940A (en) * | 2012-09-20 | 2014-04-10 | Honda Motor Co Ltd | Riding-type lawn mower |
JP2015107083A (en) * | 2013-12-05 | 2015-06-11 | フジイコーポレーション株式会社 | Mower |
US9398740B2 (en) * | 2014-01-31 | 2016-07-26 | Larry Ralph Gibson | Leaf corral for a lawnmower |
JP6413061B2 (en) * | 2014-02-26 | 2018-10-31 | フジイコーポレーション株式会社 | Mower |
USD766332S1 (en) | 2015-01-02 | 2016-09-13 | Husqvarna Ab | Bagging blade |
AU2015377239B2 (en) * | 2015-01-12 | 2019-04-04 | Husqvarna Ab | Cutting deck flow control assembly |
FR3039355B1 (en) * | 2015-07-27 | 2017-07-14 | Pellenc Sa | ELECTRIC MOWER WITH MULTIPLE BLADES |
USD786310S1 (en) | 2015-11-06 | 2017-05-09 | Husqvarna Ab | Mower blade |
USD781927S1 (en) | 2015-11-06 | 2017-03-21 | Husqvarna Ab | Mower blade |
CN105850347B (en) * | 2016-04-29 | 2017-09-05 | 海南大学 | Vertical shaft half cutting type banana stem crushing and returning to field machine |
US10440884B2 (en) | 2016-07-07 | 2019-10-15 | Deere + Company | Material collection system tube fastner |
CN106385943B (en) * | 2016-11-22 | 2018-11-02 | 河南龙安园林绿化工程有限公司 | A kind of afforestation weeder |
CN106612903A (en) * | 2016-12-08 | 2017-05-10 | 宁波大叶园林设备股份有限公司 | Front-and-rear-wheel-driven multiple-belt-slant same-direction-double-mowing-knife dual-grass-discharging lawn mowing machine |
CN106612902A (en) * | 2016-12-08 | 2017-05-10 | 宁波大叶园林设备有限公司 | Oblique equidirectional double-weeder double-discharging wide mowing machine with irregular belt and without tension wheel drive |
CN106612904A (en) * | 2016-12-08 | 2017-05-10 | 宁波大叶园林设备股份有限公司 | Dual-row grass width mower of inclined same-directional mowing cutter without ordinary belt drive of tensioning wheel |
US10334782B2 (en) * | 2017-08-25 | 2019-07-02 | Deere & Company | Grass collection chute fastener |
US10791672B2 (en) | 2017-09-21 | 2020-10-06 | Ariens Company | Lawn mower including an operator controlled discharge baffle |
WO2019084324A1 (en) | 2017-10-25 | 2019-05-02 | Advanced Biological Marketing, Inc. | Endophytic microbial seed treatment formulations and methods related thereto for improved plant performance |
US11206759B2 (en) | 2017-11-21 | 2021-12-28 | The Toro Company | Mower quick height of cut adjustment |
CN208242236U (en) * | 2017-11-24 | 2018-12-18 | 苏州宝时得电动工具有限公司 | Grass trimmer |
CN108271498B (en) * | 2018-01-24 | 2019-12-17 | 江苏昱博自动化设备有限公司 | Grass combing device with blade protection |
US10709064B2 (en) | 2018-01-31 | 2020-07-14 | The Toro Company | Propulsion control lockout and ground working vehicle incorporating same |
CN108293409B (en) * | 2018-03-15 | 2024-03-26 | 常州科伶洁清洁设备有限公司 | Mower with multidirectional cutter assembly |
US11160205B2 (en) * | 2018-03-26 | 2021-11-02 | Honda Motor Co., Ltd. | Lawnmower mulch plug ramps to improve mulching performance |
JP1643481S (en) * | 2019-04-04 | 2019-10-15 | ||
CN109964626B (en) * | 2019-05-04 | 2024-04-09 | 浙江中马园林机器股份有限公司 | Quick switching mechanism of grass mode is received to lawn mower |
CN110771339A (en) * | 2019-12-10 | 2020-02-11 | 常州格力博有限公司 | Grass cutter |
CN111887009A (en) * | 2020-03-21 | 2020-11-06 | 李继武 | Garden lawn trimming device and using method thereof |
CN112189439B (en) * | 2020-10-16 | 2021-12-07 | 吴红梅 | Gardening mowing equipment and method based on new energy application |
US11889785B2 (en) | 2021-04-21 | 2024-02-06 | Metalcraft Of Mayville, Inc. | Walk-behind lawnmower with cutting height adjuster |
JP2023151837A (en) * | 2022-04-01 | 2023-10-16 | 井関農機株式会社 | mower |
CN114931018B (en) * | 2022-04-25 | 2023-03-24 | 苏州艾维科斯园林设备有限公司 | Efficiency of work is improved lawn mower |
US11917940B1 (en) * | 2023-08-21 | 2024-03-05 | Dimaag-Ai, Inc. | Electric lawnmowers with cooling features integrated into mowing-unit enclosures and methods of operating thereof |
Family Cites Families (83)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3118267A (en) | 1964-01-21 | Lawn mower | ||
CA671157A (en) | 1963-09-24 | Root Manufacturing Company | Wheel adjustment for lawn mowers | |
US2071872A (en) | 1933-10-24 | 1937-02-23 | Power Specialties Ltd | Grass cutting machine |
US2763116A (en) | 1954-08-04 | 1956-09-18 | Donald E Flinchbaugh | Wheel mounting for lawn mower |
US2815634A (en) | 1956-01-30 | 1957-12-10 | Motor Wheel Corp | Rotary lawn mower |
US2818270A (en) * | 1956-02-27 | 1957-12-31 | Motor Wheel Corp | Wheel adjustment for lawn mowers |
US2926478A (en) | 1956-03-28 | 1960-03-01 | Sunbeam Corp | Multiple blade rotary power mower |
US2898723A (en) | 1956-06-15 | 1959-08-11 | Goodall Equipment Inc | Multiple bladed mower |
US2836029A (en) | 1956-10-25 | 1958-05-27 | Johnson Alexander John | Lawn mower cutting blade |
US2915318A (en) | 1957-02-20 | 1959-12-01 | Sears Roebuck & Co | Adjustable wheel mounting for lawnmower and the like |
US3000165A (en) | 1957-12-24 | 1961-09-19 | Sunbeam Corp | Lawn mower |
US3043604A (en) * | 1961-04-17 | 1962-07-10 | Custom Metal Products Corp | Height adjuster for rotary lawn mowers |
NL273380A (en) | 1962-01-10 | 1964-09-10 | ||
US3210089A (en) * | 1962-07-16 | 1965-10-05 | Pull R Hoist Company | Variable wheel suspension |
US3147987A (en) | 1962-08-22 | 1964-09-08 | Sunbeam Corp | Adjustable wheel support for a lawn mower |
US3178874A (en) * | 1962-08-31 | 1965-04-20 | Yard Man Inc | Lawn mower |
GB1000650A (en) | 1963-08-22 | 1965-08-11 | Pugh Charles H Ltd | Improvements relating to horticultural machines |
US3269100A (en) * | 1964-07-15 | 1966-08-30 | Mcdonough Power Equipment Inc | Height adjustment mechanism for lawn mowers |
US3460325A (en) | 1966-05-20 | 1969-08-12 | Mast Foos Mfg Co | Lawnmowers and like equipment |
US3390894A (en) * | 1966-07-05 | 1968-07-02 | Sunbeam Corp | Lawn mower with an adjustable wheel support |
US3421776A (en) * | 1966-10-05 | 1969-01-14 | Singer Co | Lawnmower height adjustment apparatus |
US3485018A (en) | 1967-04-04 | 1969-12-23 | Black & Decker Mfg Co | Lawn mower deck housing |
US3428328A (en) * | 1967-04-04 | 1969-02-18 | Black & Decker Mfg Co | Wheel height adjustment for lawn mower |
US3545706A (en) * | 1968-10-25 | 1970-12-08 | Yard Man Of Illinois Inc | Vibration suppressing engine mount |
US3649828A (en) * | 1970-06-24 | 1972-03-14 | Gilson Brothers Co | Adjustable wheel bracket assembly |
US3667199A (en) | 1970-06-26 | 1972-06-06 | Black & Decker Mfg Co | Power-operated lawnmower with improved discharge means |
US3677574A (en) * | 1970-10-09 | 1972-07-18 | Lawrence Cyr | Means for adjusting heights of cut in power mower |
AU456928B2 (en) | 1971-07-06 | 1974-12-16 | Mason And Porter Limited | Improvements in or relating to rotary mowing machines |
US3680295A (en) | 1971-08-20 | 1972-08-01 | Harry T Rutherford | Safety rotary mower |
US3706190A (en) * | 1971-10-20 | 1972-12-19 | G W Davis Corp | Rotary power mower having an improved deflector for the discharge outlet |
US3799579A (en) * | 1972-11-06 | 1974-03-26 | Outboard Marine Corp | Rear shield for rotary lawnmower |
US3797214A (en) * | 1972-11-10 | 1974-03-19 | Deere & Co | Mower discharge chute deflector and bagging attachment |
US4041679A (en) * | 1974-02-01 | 1977-08-16 | Lester H. Seifert | Self-propelled rotary lawn mower |
US3958401A (en) | 1974-09-05 | 1976-05-25 | Outboard Marine Corporation | Grass collection apparatus |
US4055036A (en) | 1975-03-06 | 1977-10-25 | Outboard Marine Corporation | Multiple spindle rotary mower |
US4064680A (en) | 1975-08-08 | 1977-12-27 | The Black And Decker Manufacturing Company | Cordless twin blade lawnmower construction |
CA1030774A (en) * | 1975-08-21 | 1978-05-09 | Canadian General Electric Company Limited | Rotary lawn mower with improved grass collector |
US4158279A (en) * | 1977-04-05 | 1979-06-19 | Mcdonough Power Equipment, Inc. | Riding mower with grass collecting system |
US4189903A (en) * | 1978-06-23 | 1980-02-26 | Mcdonough Power Equipment, Division Of Fuqua Industries, Inc. | Rotary lawn mower with removable mulching attachment |
US4280319A (en) * | 1978-06-26 | 1981-07-28 | Roper Corporation | Deck construction for rotary mower |
GB2028085A (en) * | 1978-08-15 | 1980-03-05 | Gen Electric Canada | Modular lawn mower |
DE2908416A1 (en) | 1979-03-03 | 1980-09-11 | Ulrich Klotzki | Lawn mower with chassis and blades - has flat-strip blanks fixed to vertical shaft with axes of rotation transposed |
US4258539A (en) * | 1979-08-29 | 1981-03-31 | Outboard Marine Corporation | Grass discharge chute deflector for rotary lawn mower |
US4321785A (en) * | 1980-12-08 | 1982-03-30 | Ataco Steel Products Co. | Wheel height adjuster |
US4317325A (en) | 1980-12-18 | 1982-03-02 | J. I. Case Comany | Timing belt adjustment mechanism |
US4435949A (en) * | 1982-07-12 | 1984-03-13 | Outboard Marine Corporation | Mulching adapter for rotary lawn mower |
US4525989A (en) * | 1983-08-01 | 1985-07-02 | Roper Corporation | Floating foot shield for walk-behind mower with sulky |
GB2167636B (en) * | 1984-11-30 | 1988-06-02 | Honda Motor Co Ltd | Cutter housing for power-driven lawn mower |
US4747259A (en) * | 1986-10-01 | 1988-05-31 | Kline Daniel J | Grass catching assembly and disposable bag therefor |
US4726178A (en) * | 1986-10-24 | 1988-02-23 | Textron Inc. | Discharge cover assembly |
US4899526A (en) * | 1988-08-08 | 1990-02-13 | Savannah Plastics, Inc. | Mower deck construction and method for making same |
US4887420A (en) | 1988-10-31 | 1989-12-19 | Deere & Company | Modular mower deck with light-weight housing |
US4899524A (en) * | 1988-12-02 | 1990-02-13 | Eilles Frank A | Height adjuster for lawn mowers |
DE4113567C1 (en) | 1991-04-25 | 1992-06-17 | Wiedenmann Gmbh, 7901 Rammingen, De | Attachable mower with several driven rotors - has rotor support plate fitted with drive system and attachment mechanism |
US5179823A (en) * | 1991-07-23 | 1993-01-19 | Pace Sang H | Variable mulching mower with edger attachment |
US5398491A (en) * | 1992-10-13 | 1995-03-21 | Honda Giken Kogyo Kabushiki Kaisha | Lawn mower side discharge chute |
US5259175A (en) * | 1992-11-24 | 1993-11-09 | The Toro Company | Lawn mower height of cut adjustment system |
US5526633A (en) * | 1994-08-12 | 1996-06-18 | Black & Decker Inc. | Lawn mower having improved deck height adjustment mechanism |
US5638668A (en) * | 1995-06-26 | 1997-06-17 | The Toro Company | Lawn mower having nested deck and liner |
US5638667A (en) * | 1995-06-26 | 1997-06-17 | The Toro Company | Mulching mower |
US5816033A (en) * | 1995-11-16 | 1998-10-06 | Exmark Mfg. Co., Inc. | Riding lawn mower including a mower deck height control mechanism |
US5769747A (en) | 1996-09-05 | 1998-06-23 | Deere & Company | Belt tensioning mechanism with stop feature |
US5749209A (en) * | 1996-09-05 | 1998-05-12 | Mtd Products Inc | Single lever height adjustment mechanism and method for a lawn mower |
US5836144A (en) | 1997-01-24 | 1998-11-17 | Deere & Company | Mounting plate for mower deck |
US5884466A (en) * | 1997-02-05 | 1999-03-23 | White Consolidated Industries, Inc. | Plastic deck liner for lawn mower |
US5992135A (en) * | 1997-12-08 | 1999-11-30 | Deere & Company | Discharge chute support member |
US6910324B2 (en) * | 2002-02-01 | 2005-06-28 | The Toro Company | Multi-bladed rotary cutting deck with mulching and discharge/collection modes |
US6772579B2 (en) * | 2002-03-04 | 2004-08-10 | Honda Giken Kogyo Kabushiki Kaisha | Lawnmower housing reinforcement |
US20030182919A1 (en) * | 2002-03-28 | 2003-10-02 | Baumann James R. | Deck assembly for a self-propelled, walk-behind rotary lawn mower |
US6609358B1 (en) * | 2002-06-25 | 2003-08-26 | Deere & Company | Mower having a mower deck adapted for selective mulching or non-mulching modes |
US7093415B2 (en) * | 2003-06-23 | 2006-08-22 | The Toro Company | Lawn mower having adjustable flow control baffle |
US6971224B1 (en) * | 2004-12-30 | 2005-12-06 | Ariens Company | Retractable discharge chute for a lawn mower |
JP4275088B2 (en) * | 2005-03-09 | 2009-06-10 | 株式会社クボタ | Side discharge mower |
US7971416B2 (en) * | 2005-03-09 | 2011-07-05 | Deere & Company | Mounting hydraulic motor on mower deck |
US7677022B2 (en) * | 2005-10-19 | 2010-03-16 | Deere & Company | Convertible mower deck with angled pivoting baffles |
US7866135B2 (en) * | 2006-08-28 | 2011-01-11 | Exmark Manufacturing Company, Inc. | Flow control baffle for turf mower |
JP4791931B2 (en) * | 2006-10-16 | 2011-10-12 | 株式会社クボタ | Moore |
US7610742B2 (en) * | 2006-10-19 | 2009-11-03 | Kubota Corporation | Mower unit |
US7574852B1 (en) * | 2006-10-25 | 2009-08-18 | Exmark Mfg. Co., Inc. | Multi-bladed cutting deck with adjustable flow control baffles |
US7578117B2 (en) * | 2007-03-20 | 2009-08-25 | Mtd Products Inc | Foot actuated height adjustment mechanism for a lawnmower cutting deck |
US7555887B2 (en) * | 2007-08-01 | 2009-07-07 | Shivvers Group Incorporated | Mower deck enhancement |
US7624562B2 (en) * | 2007-08-02 | 2009-12-01 | The Toro Company | Mower cutting deck having operator controlled discharge opening using intuitively operable handle |
DE202012102156U1 (en) * | 2012-06-12 | 2013-09-18 | Al-Ko Kober Ag | mowing machine |
-
2011
- 2011-12-06 US US13/312,433 patent/US8539745B2/en active Active
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2013
- 2013-03-18 US US13/845,530 patent/US8857145B2/en active Active
- 2013-03-18 US US13/845,553 patent/US8701377B1/en active Active
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Also Published As
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US20130139485A1 (en) | 2013-06-06 |
US8857145B2 (en) | 2014-10-14 |
US20140123615A1 (en) | 2014-05-08 |
US8887480B2 (en) | 2014-11-18 |
US8539745B2 (en) | 2013-09-24 |
US8701377B1 (en) | 2014-04-22 |
US20130283747A1 (en) | 2013-10-31 |
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