Integrated transaxle standing mower operator platform

• US 10,091,936 B2
• Filed: 12/01/2015
• Issued: 10/09/2018
• Est. Priority Date: 12/02/2014
• Status: Active Grant

• Current Assignee: Briggs & Stratton LLC (Briggs & Stratton Corporation)
• Original Assignee: Briggs & Stratton Corporation
• Inventors: Laurin, Robert S., Lynch, E. Mark, Camenga, Derrick R.
• Primary Examiner(s): Pezzuto, Robert E
• Assistant Examiner(s): Behrens, Adam J
• Application Number:
  US14/955,123
• Publication Number:
  US 20160152262A1
• Time in Patent Office: 1,043 Days
• CPC Class Codes: A01D 2101/00 Lawn-mowers
• CPC Class Codes: A01D 34/64 mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle A01D34/695 takes precedence
• CPC Class Codes: A01D 34/82 Other details
• CPC Class Codes: A01D 69/03 fluid
• CPC Class Codes: B60T 7/12 for automatic initiation; for initiation not subject to will of driver or passenger limiting speed of vehicles other than rail vehicles B60K31/00

Abstract

A standing ride on mower comprises a frame; a right drive wheel supporting the frame; a left drive wheel supporting the frame; a prime mover supported by the frame; a cutting deck assembly supported by the frame, the cutting deck assembly comprising a cutting deck at least one cutting blade mounted under the cutting deck and rotatable under influence of the prime mover; a right side integrated transaxle operating under influence of the prime mover to drive rotation of the right drive wheel, the right side integrated transaxle including a right side housing, a right hydraulic pump within the housing, and a right hydraulic motor within the housing; a left side integrated transaxle operating under the influence of the prime mover to drive rotation of the left drive wheel, the left side integrated transaxle including a left side housing, a left hydraulic pump within the housing, and a left hydraulic motor within the housing; and an operator platform to support a standing operator of the mower. The operator platform extends beneath the left housing and beneath the right housing.

Claims

1. A standing ride on mower comprising:

a frame;

a right drive wheel supporting the frame;

a left drive wheel supporting the frame;

a prime mover supported by the frame;

a cutting deck assembly supported by the frame, the cutting deck assembly comprising a cutting deck, at least one cutting blade mounted under the cutting deck and rotatable under influence of the prime mover;

at least one integrated transaxle housing;

a right side integrated transaxle operating under influence of the prime mover to drive rotation of the right drive wheel, the right side integrated transaxle including a right hydraulic pump and a right hydraulic motor within the at least one integrated transaxle housing;

a left side integrated transaxle operating under the influence of the prime mover to drive rotation of the left drive wheel, the left side integrated transaxle including a left hydraulic pump and a left hydraulic motor within the at least one integrated transaxle housing; and

an operator platform to support a standing operator of the mower, the operator platform extending at least partially beneath the at least one integrated transaxle housing, wherein the at least one integrated transaxle housing comprises a housing portion vertically sandwiched between the operator platform and the right hydraulic motor, the housing being directly above the operator platform.

2. The mower of claim 1, wherein the operator platform has an upper surface directly underlying a lower surface of the at least one integrated transaxle housing, the upper surface spaced at least 2 inches below the lower surface.

3. The mower of claim 1, wherein the platform is pivotable about an axis between a raised position in absence of the operator and a lowered position during presence of the operator standing on the platform.

4. The mower of claim 3, where the platform rearwardly extends at an upward angle of at least 10 degrees relative to horizontal in the lowered position.

5. The mower of claim 4, wherein the platform rearwardly extends in an upward angle of at least 15 degrees relative to horizontal in the raised position.

6. The mower of claim 3, wherein the platform pivots about a pivot axis beneath the at least one integrated transaxle housing.

7. The mower of claim 1 further comprising a resistance adjuster to adjust the level of resistance against movement of the operator platform from the raised position to the lowered position.

8. The mower of claim 1, wherein the platform has a left side edge within 11 inches from an outer side of the left drive wheel.

9. The mower of claim 1, wherein the operator platform has a front edge no more than 2 inches rearward a drive axis of the left drive wheel and the right drive wheel.

10. The mower of claim 1, wherein the operator platform has a width of at least 24 inches.

11. The mower of claim 1, wherein the right and left drive wheels have a wheel track and wherein the platform has a width of at least 55% of the wheel track.

12. The mower of claim 1 further comprising a parking brake, wherein the parking brake is automatically engaged in response to the platform in the raised position.

13. The mower of claim 11, wherein driven rotation of the at least one cutting blade is terminated in response to the platform in the raised position and while operation of the prime mover continues.

14. The mower of claim 1, wherein the left drive wheel and the right drive wheel each have a diameter of at least 20 inches.

15. The mower of claim 1, wherein the at least one integrated transaxle housing comprises:

a left integrated transaxle housing containing the left hydraulic pump and the left hydraulic motor; and

a right integrated transaxle housing containing the right hydraulic pump and the right hydraulic motor.

16. The mower of claim 1, wherein the at least one integrated transaxle housing comprises:

a first single housing enclosing the right hydraulic pump and the right hydraulic motor, extending below the right hydraulic pump and the right hydraulic motor and directly above the operator platform; and

a second single housing enclosing the left hydraulic pump and the left hydraulic motor, extending below the left hydraulic pump and the left hydraulic motor and directly above the operator platform.

18. The mower of claim 1, wherein the left hydraulic motor and the left hydraulic pump each extend at least partially below a rotational axis of the left drive wheel.

19. The mower of claim 18, wherein the left hydraulic motor is directly above at least a portion of the operator platform.

20. The mower of claim 1, wherein the operator platform is pivotable about a pivot axis directly beneath the left hydraulic motor and the right hydraulic motor.

22. The mower of claim 1 wherein the at least one integrated transaxle housing comprises a left transaxle housing enclosing the left hydraulic pump, the left hydraulic motor, wherein a left hydraulic pump input shaft extends through the left transaxle housing and wherein a left hydraulic motor output shaft extends through the left transaxle housing.

23. The mower of claim 1, wherein the least one integrated transaxle housing interconnects and supports the left hydraulic pump and the left hydraulic motor relative to one another independent of the frame as a modular, self-contained and independent unit and wherein the least one integrated transaxle housing is directly above at least portions of the operator platform.

17. A standing ride on mower comprising:

a frame;

a right drive wheel supporting the frame;

a left drive wheel supporting the frame;

a prime mover supported by the frame;

a cutting deck assembly supported by the frame, the cutting deck assembly comprising a cutting deck, at least one cutting blade mounted under the cutting deck and rotatable under influence of the prime mover;

at least one integrated transaxle housing;

a right side integrated transaxle operating under influence of the prime mover to drive rotation of the right drive wheel, the right side integrated transaxle including a right hydraulic pump and a right hydraulic motor within the at least one integrated transaxle housing;

a left side integrated transaxle operating under the influence of the prime mover to drive rotation of the left drive wheel, the left side integrated transaxle including a left hydraulic pump and a left hydraulic motor within the at least one integrated transaxle housing; and

an operator platform to support a standing operator of the mower, the operator platform extending at least partially beneath the at least one integrated transaxle housing, wherein the operator platform continuously extends from a left edge of the left hydraulic motor to a right edge of the right hydraulic motor, directly beneath the left hydraulic motor and directly beneath the right hydraulic motor.

21. A standing ride on mower comprising:

a frame;

a right drive wheel supporting the frame;

a left drive wheel supporting the frame;

a prime mover supported by the frame;

a cutting deck assembly supported by the frame, the cutting deck assembly comprising a cutting deck, at least one cutting blade mounted under the cutting deck and rotatable under influence of the prime mover;

at least one integrated transaxle housing;

a right side integrated transaxle operating under influence of the prime mover to drive rotation of the right drive wheel, the right side integrated transaxle including a right hydraulic pump and a right hydraulic motor within the at least one integrated transaxle housing;

a left side integrated transaxle operating under the influence of the prime mover to drive rotation of the left drive wheel, the left side integrated transaxle including a left hydraulic pump and a left hydraulic motor within the at least one integrated transaxle housing; and

an operator platform to support a standing operator of the mower, the operator platform extending at least partially beneath the at least one integrated transaxle housing, wherein the left hydraulic pump is directly in front of the left hydraulic motor and wherein the operator platform is directly beneath the left hydraulic motor.