GB2588000A - Lawn mower blade drive system - Google Patents

Lawn mower blade drive system Download PDF

Info

Publication number
GB2588000A
GB2588000A GB2018199.6A GB202018199A GB2588000A GB 2588000 A GB2588000 A GB 2588000A GB 202018199 A GB202018199 A GB 202018199A GB 2588000 A GB2588000 A GB 2588000A
Authority
GB
United Kingdom
Prior art keywords
bbc
cutting blade
output shaft
mower according
blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB2018199.6A
Other versions
GB2588000B (en
GB202018199D0 (en
Inventor
Simon Carter Richard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toro Co
Original Assignee
Toro Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toro Co filed Critical Toro Co
Publication of GB202018199D0 publication Critical patent/GB202018199D0/en
Publication of GB2588000A publication Critical patent/GB2588000A/en
Application granted granted Critical
Publication of GB2588000B publication Critical patent/GB2588000B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/76—Driving mechanisms for the cutters
    • 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
    • A01D34/6812—Braking or clutching mechanisms

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

Embodiments of the present disclosure are directed to lawn mowers (e.g., walk power mowers), having a deck supported for travel over a ground surface. The deck may support a prime mover having an output shaft adapted to power a cutting blade contained within a cutting chamber defined by the deck. The mower may also include a drive system to power the cutting blade. In some embodiments, the cutting blade may attach to the output shaft of the prime mover via a friction interface such that, upon unintended blade contact with obstacles, the blade may rotationally slip relative to the output shaft. Moreover, the mower may include a blade brake clutch (BBC) adapted to permit selective activation and deactivation of the blade independent of the prime mover.

Claims (15)

1. A lawn mower comprising: a deck comprising an upper surface; a prime mover attached to the upper surface and comprising an output shaft extending downwardly through the upper surface; a blade brake clutch (BBC) operatively attached to the output shaft; a cutting blade; and a friction interface between the cutting blade and the BBC, wherein the BBC is selectively actuatable between an engaged position, wherein the BBC couples the cutting blade to the output shaft, and a disengaged position, wherein the BBC decouples the cutting blade from the output shaft, and wherein the friction interface permits rotational slip of the cutting blade relative to the BBC upon application of a threshold torque applied to the cutting blade.
2. The mower according to claim 1, wherein the deck further comprises ground contact members adapted to support the deck in rolling engagement with a ground surface.
3. The mower according to claim 2, wherein at least one of the ground contact members comprises a driven member.
4. The mower according to claim 3, wherein the driven member comprises a roller driven by the prime mover.
5. The mower according to any one of claims 1-4, further comprising a transmission pulley attached to the output shaft.
6. The mower according to claim 5, wherein the transmission pulley comprises a variable ratio pulley.
7. The mower according to any one of claims 1-4, wherein the friction interface comprises a friction disk.
8. The mower according to claim 7, wherein the BBC comprises protrusions adapted to engage openings in the friction disk.
9. The mower according to claim 7, wherein the cutting blade is adapted to rotationally slip relative to the friction disk.
10. The mower according to any one of claims 1-4, wherein the prime mover comprises an internal combustion engine.
11. A lawn mower comprising: a deck comprising an upper surface partially defining a cutting chamber; a prime mover attached to the upper surface of the deck and comprising an output shaft extending downwardly into the cutting chamber; a transmission pulley attached to the output shaft; a cutting blade; a blade brake clutch (BBC) operatively attached to the output shaft below the transmission pulley, the BBC selectively actuatable between an engaged position, wherein the BBC couples the cutting blade to the output shaft, and a disengaged position, wherein the BBC decouples the cutting blade from the output shaft; and a friction disk positioned between the cutting blade and the BBC, the friction disk permitting rotational slip of the cutting blade, relative to the BBC, upon application of a threshold torque to the cutting blade.
12. The mower according to claim 11, wherein the BBC comprises downwardly extending protrusions mechanically received within openings formed in the friction disk.
13. The mower according to claim 12, further comprising a fastener that extends through the cutting blade and the friction disk and threadably engages the BBC.
14. The mower according to any one of claims 11-13, wherein the transmission pulley comprises a variable ratio pulley.
15. The mower according to any one of claims 1 1-13, wherein the prime mover comprises an internal combustion engine.
GB2018199.6A 2018-06-07 2019-05-30 Lawn mower blade drive system Active GB2588000B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862681739P 2018-06-07 2018-06-07
PCT/US2019/034584 WO2019236369A1 (en) 2018-06-07 2019-05-30 Lawn mower blade drive system

Publications (3)

Publication Number Publication Date
GB202018199D0 GB202018199D0 (en) 2021-01-06
GB2588000A true GB2588000A (en) 2021-04-14
GB2588000B GB2588000B (en) 2022-08-31

Family

ID=66913015

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2018199.6A Active GB2588000B (en) 2018-06-07 2019-05-30 Lawn mower blade drive system

Country Status (2)

Country Link
GB (1) GB2588000B (en)
WO (1) WO2019236369A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707362A (en) * 1952-11-03 1955-05-03 Buffalo Eclipse Corp Yieldable drive connection for a rotary lawn mower
US2875569A (en) * 1956-07-09 1959-03-03 Wilbur C Sauer Blade mounting means for rotary disc type mower
US4055935A (en) * 1974-04-10 1977-11-01 Malion William R Clutch brake mechanism for lawnmowers
DE3120888A1 (en) * 1981-05-26 1982-12-16 Solo Kleinmotoren Gmbh, 7032 Sindelfingen Lawnmower with an internal-combustion engine
US5581985A (en) * 1995-06-15 1996-12-10 Secosky; Paul M. Safety clutches for self power operated lawn mowers
US20020183145A1 (en) * 2001-05-04 2002-12-05 Robert Blanchard Speed transmission for self-propelled lawnmower and mower provided with such a transmission

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707362A (en) * 1952-11-03 1955-05-03 Buffalo Eclipse Corp Yieldable drive connection for a rotary lawn mower
US2875569A (en) * 1956-07-09 1959-03-03 Wilbur C Sauer Blade mounting means for rotary disc type mower
US4055935A (en) * 1974-04-10 1977-11-01 Malion William R Clutch brake mechanism for lawnmowers
DE3120888A1 (en) * 1981-05-26 1982-12-16 Solo Kleinmotoren Gmbh, 7032 Sindelfingen Lawnmower with an internal-combustion engine
US5581985A (en) * 1995-06-15 1996-12-10 Secosky; Paul M. Safety clutches for self power operated lawn mowers
US20020183145A1 (en) * 2001-05-04 2002-12-05 Robert Blanchard Speed transmission for self-propelled lawnmower and mower provided with such a transmission

Also Published As

Publication number Publication date
GB2588000B (en) 2022-08-31
GB202018199D0 (en) 2021-01-06
WO2019236369A8 (en) 2020-03-19
WO2019236369A1 (en) 2019-12-12

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