PTO control system

Patent metadata

Field	Value
Publication number	US-9398741-B2
Application number	US-201214433465-A
Country	US
Kind code	B2
Filing date	Oct 4, 2012
Priority date	Oct 4, 2012
Publication date	Jul 26, 2016
Grant date	Jul 26, 2016

Abstract

A lawn care device may include a cutting deck housing at least one blade, an engine configured to selectively provide for rotation of the at least one blade responsive to selective coupling of the rotary power of the engine to the at least one blade via a power takeoff (PTO) clutch, and a PTO switch that is operable in two directions to engage or disengage the PTO clutch based on which one of the two directions the PTO switch is moved by a user. The PTO switch may be biased to return to a neutral position after each operation thereof. The PTO switch may be configured to perform at least one additional operational function responsive to sequential operation of the PTO switch in at least one of the two directions.

First claim

That which is claimed:

1. A lawn care device comprising:
a cutting deck housing at least one blade;
an engine configured to selectively provide for rotation of the at least one blade responsive to selective coupling of the rotary power of the engine to the at least one blade via a power takeoff (PTO) clutch; and
a PTO switch that is operable in two directions to engage or disengage the PTO clutch based on which one of the two directions the PTO switch is moved by a user,
wherein the PTO switch is biased to return to a neutral position after each operation thereof, and
wherein the PTO switch is configured to perform at least one additional operational function responsive to sequential operation of the PTO switch in at least one of the two directions.

2. The lawn care device of claim 1 , wherein the PTO switch comprises a spring configured to return the PTO switch to the neutral position responsive to a release of the PTO switch by the user after movement of the PTO switch in either of the two directions.

3. The lawn care device of claim 1 , wherein the at least one additional operational function comprises enablement for rotation of the at least one blade while the lawn care device is operated in a reverse direction.

4. The lawn care device of claim 3 , wherein the at least one additional operational function is initiated responsive to movement of the PTO switch at least a predetermined number of times in the same direction within a given period of time.

5. The lawn care device of claim 4 , wherein the at least one additional operational function is initiated responsive to sequential operation of the PTO switch comprising movement of the PTO switch at least two successive times in a direction corresponding with engagement of the PTO clutch.

6. The lawn care device of claim 4 , wherein the at least one additional operational function is initiated responsive to movement of the PTO switch at least two times in the same direction within about one second.

7. The lawn care device of claim 3 , wherein the PTO switch comprises a shaft that extends at least in part into an operation panel of the lawn care device, and a cap disposed at a distal end of the shaft relative to the operation panel,
wherein the cap comprises at least one light element disposed therein, and
wherein the light element is configured to be lit responsive to enablement for rotation of the at least one blade while the lawn care device is operated in the reverse direction.

8. The lawn care device of claim 1 , wherein the PTO switch comprises a shaft that extends at least in part into an operation panel of the lawn care device.

9. The lawn care device of claim 1 , wherein the PTO switch comprises a shaft that extends at least in part into an operation panel of the lawn care device, and a cap disposed at a distal end of the shaft relative to the operation panel.

10. The lawn care device of claim 1 , wherein the PTO switch comprises a shaft that extends at least in part into an operation panel of the lawn care device, and a cap disposed at a distal end of the shaft relative to the operation panel, and
wherein the cap comprises at least one light element disposed therein.

11. The lawn care device of claim 1 , wherein the PTO switch is configured to provide an input to processing circuitry indicative of a direction of movement of the PTO switch, and wherein the processing circuitry is configured to control operation of the PTO clutch based on inputs provided by the PTO switch.

12. The lawn care device of claim 1 , wherein the PTO switch is configured to provide an input to processing circuitry indicative of a direction of movement of the PTO switch,
wherein the processing circuitry is configured to control operation of the PTO clutch based on inputs provided by the PTO switch,
wherein the processing circuitry receives information indicative of operational characteristics of the lawn care device via a data bus, and
wherein the processing circuitry provides instructions to the PTO clutch and a reverse switch via the data bus.

13. The lawn care device of claim 1 , wherein the lawn care device is a riding lawn mower.

14. A power takeoff (PTO) switch for controlling selective coupling of rotary power from an engine of a lawn care device to a cutting blade of the lawn care device via a PTO clutch, the PTO switch comprising:
a cap portion graspable by a user of the lawn care vehicle;
a shaft having the cap portion disposed proximate to one end thereof and extending into the lawn care device, the shaft being operable in two directions; and
a contact plate disposed proximate to an opposite end of the shaft to make electrical contact with one of at least two contacts responsive to movement of the shaft, the at least two contacts corresponding to an engagement contact and a disengagement contact,
wherein electrical contact between the contact plate and the engagement contact engages the PTO clutch and electrical contact between the contact plate and the disengagement contact disengages the PTO clutch,
wherein the shaft is biased to return to a neutral position after each operation of the PTO switch, and
wherein sequential electrical contacts between the engagement contact and the contact plate causes at least one additional operational function of the lawn care device to be performed.

15. The PTO switch of claim 14 , further comprising a spring configured to return the shaft to the neutral position responsive to a release of the cap by the user after movement of the shaft in either of the two directions.

16. The PTO switch of claim 14 , wherein the at least one additional operational function comprises enablement for rotation of the cutting blade while the lawn care device is operated in a reverse direction.

17. The PTO switch of claim 16 , wherein the at least one additional operational function is initiated responsive to movement of the shaft at least a predetermined number of times in the same direction within a given period of time.

18. A lawn care vehicle comprising:
an engine;
a power-takeoff (PTO) system configured to transmit power from the engine to an implement to drive a moveable device of the implement;
an electric clutch system configured to selectively engage and disengage the PTO system;
a PTO switch that is operable in two directions and is biased to return to a neutral position after each operation thereof;
processing circuitry configured to control the PTO system and record, in a memory, a recorded state of the PTO switch, the processing circuitry communicably coupled to the electric clutch system, the PTO switch, and the memory, wherein a response of the processing circuitry to operation of the PTO switch depends at least in part on the recorded state of the PTO switch, and wherein the processor is configured to confirm or change the recorded state of the PTO switch upon the occurrence of each of the following events: the PTO switch being actuated, the engine being shutdown or started, or the PTO being disengaged.

19. The lawn care vehicle of claim 18 , wherein the processing circuitry is configured to store in memory a recorded state of the PTO switch that communicates that the PTO switch is in an off position corresponding to the PTO being disengaged;
wherein the processing circuitry is configured to store in memory a recorded state of the PTO switch that communicates that the PTO switch is in an on position corresponding to the PTO being engaged; and
wherein the processing circuitry is configured to change the recorded state of the PTO switch in the

Assignees

• Husqvarna Ab

Inventors

• Dwyer Sean
• Rodriguez Juan
• Albinger Matthew

Classifications

• H01H15/24

  having a single operating part only protruding from one side of the switch casing for alternate pushing and pulling · CPC title

• A01D69/08

  Clutches · CPC title

• B60K25/00

  Auxiliary drives (arrangement of tyre-inflating pumps mounted on vehicles B60C23/10) · CPC title

• H01H13/52

  the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch · CPC title

• A01D34/76 Primary

  Driving mechanisms for the cutters · CPC title