Flexible mower deck

Patent metadata

Field	Value
Publication number	US-12041875-B2
Application number	US-202117248663-A
Country	US
Kind code	B2
Filing date	Feb 2, 2021
Priority date	Oct 23, 2020
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

A flexible mower deck includes a center deck with a plurality of belt driven pulleys for rotating a plurality of rotary cutting blades under the center deck. A wing deck is pivotably attached to each of the first and second ends. A motor on each wing deck rotates a rotary cutting blade by actuating a switch in an operator station to pivot each wing deck to a mowing position.

First claim

What is claimed is:

1. A flexible mower deck, comprising:
a center deck with a plurality of rotary cutting blades rotated by a belt engaging a driven pulley for each blade;
a first wing deck and a second wing deck pivotably attached to a first end and a second end of the center deck, each of the wing decks pivotable between a lowered mowing position and a raised transport position;
an electric motor mounted on each of the wing decks to rotate a rotary cutting blade under each of the wing decks; and
a controller configured to 1) monitor a sensed rotational speed of the plurality of rotary cutting blades of the center deck and 2) set a rotational speed for each of the electric motors to match the sensed rotational speed;
wherein the belt is operable to rotate the plurality of rotary cutting blades of the center deck while each wing deck is in either the mowing position or the transport position.

2. The flexible mower deck of claim 1 further comprising a deck position sensor on each of the wing decks that detects if the wing deck is raised to the transport position.

3. The flexible mower deck of claim 1 further comprising a lift/lower switch on each of a pair of operator controls to pivot each wing deck between the mowing position and the transport position.

4. The flexible mower deck of claim 1 further comprising:
a first height of cut actuator coupled to the first wing deck by way of a first linkage, the first height of cut actuator and the first linkage configured to raise and lower a height of cut of the first wing deck; and
a second height of cut actuator coupled to the second wing deck by way of a second linkage, the second height of cut actuator and the second linkage configured to raise and lower a height of cut of the second wing deck.

5. The flexible mower deck of claim 1 further comprising:
a first rear arm balancer linkage having an adjustable length for setting a first wing deck rake angle; and
a second rear arm balancer linkage having an adjustable length for setting a second wing deck rake angle.

6. A flexible mower deck, comprising:
a pair of electrical switches in an operator station of a zero turning radius mower to pivot a pair of wing decks between a mowing position and a transport position;
an electric motor on each of the wing decks that rotates a rotary cutting blade if the wing deck is in a mowing position;
a center deck positioned between the pair of wing decks having a plurality of rotary cutting blades that are rotated if the wing decks are in the mowing position or the transport position; and
a controller configured to 1) monitor a sensed rotational speed of the plurality of rotary cutting blades of the center deck and 2) set a rotational speed for each of the electric motors to match the sensed rotational speed.

7. The flexible mower deck of claim 6 wherein the plurality of rotary cutting blades of the center deck are belt driven.

8. The flexible mower deck of claim 6 further comprising a pair of hydraulic cylinders actuated by the pair of electrical switches in the operator station to raise and lower each of the wing decks.

9. The flexible mower deck of claim 6 further wherein the switches are on operator control levers.

10. The flexible mower deck of claim 6 further comprising a height of cut actuator coupled to each of the wing decks by way of a linkage configured to raise and lower a height of cut of each of the wing decks.

11. The flexible mower deck of claim 6 further comprising a rear arm balancer linkage coupled to each of the wing decks and having an adjustable length for setting each wing deck rake angle.

12. A flexible mower deck, comprising:
a center deck having a first end and a second end;
a plurality of belt driven pulleys on the center deck for rotating a plurality of rotary cutting blades under the center deck;
a wing deck pivotably attached to each of the first and second ends;
a motor on each wing deck for rotating a rotary cutting blade by actuating a switch in an operator station to pivot each wing deck to a mowing position; and
a controller configured to 1) monitor a sensed rotational speed of the plurality of rotary cutting blades of the center deck and 2) set a rotational speed for each of the motors to match the sensed rotational speed.

13. The flexible mower deck of claim 12 wherein the motor on each wing deck is electric.

14. The flexible mower deck of claim 12 wherein the motor on each wing deck is hydraulic.

15. The flexible mower deck of claim 12 wherein each wing deck may be independently pivoted to a mowing position using a hydraulic cylinder.

16. The flexible mower deck of claim 12 further comprising a height of cut actuator coupled to each of the wing decks by way of a linkage configured to raise and lower a height of cut of each of the wing decks.

17. The flexible mower deck of claim 12 further comprising a rear arm balancer linkage coupled to each of the wing decks and having an adjustable length for setting each wing deck rake angle.

Assignees

• Deere & Co

Inventors

• Bagwan Rajesaheb
• Steen Chad C
• Schmidt Michael T
• Bellalbero Julian
• Funk Eric R

Classifications

• A01D34/828

  Safety devices · CPC title

• A01D34/82

  Other details · CPC title

• A01D69/02

  electric · CPC title

• A01D75/306

  for lawn mowers positioned one behind the other or side by side · CPC title

• A01D34/78

  electric · CPC title