GEARBOX UNIT FOR A FARM VEHICLE WITH A WIDE RANGE OF SPEEDS

• US 20180306292A1
• Filed: 10/07/2016
• Published: 10/25/2018
• Est. Priority Date: 10/08/2015
• Status: Active Grant

• Current Assignee: Groupement International De Mecanique Agricole Co.
• Original Assignee: Groupement International De Mecanique Agricole Co.
• Inventors: LADRIERE, Pascal, FOLLIOT, Didier, CUEVAS MELO, Oscar
• Granted Patent: US 10,641,372 B2
• Time in Patent Office: Days
• CPC Class Codes: A01B 76/00 Parts, details or accessories of agricultural machines or implements, not provided for in groups A01B51/00 - A01B75/00
• CPC Class Codes: F16H 2037/049 Forward-reverse units with forward and reverse gears for achieving multiple forward and reverse gears, e.g. for working machines
• CPC Class Codes: F16H 2200/0078 the gear ratio comprising twelve or more forward speeds
• CPC Class Codes: F16H 3/006 power being selectively transmitted by either one of the parallel flow paths
• CPC Class Codes: F16H 37/042 change gear transmissions in group arrangement

Abstract

A gearbox assembly (10) including a system of stacked planetary gearsets; a clutch device (16) including: an input clutch shaft (86) and an output clutch shaft (90); a large clutch wheel (94) and a small clutch wheel (96) mounted idle on said output clutch shaft (90); a clutch coupling device (98) for coupling the small (96) and large wheels (94) with the output clutch shaft (90); an output shaft (13) including a small output wheel (114) meshing with the large clutch wheel (94) and a large output wheel (116) meshing with the small clutch wheel. The assembly also includes a decoupling device (118) between the output shaft (13) and the large output wheel (116).

Claims

1. A gearbox unit for a farming motor vehicle comprising:

a system of staged planetary gears in order to provide a plurality of first transmission ratios;

a clutch device comprising an input shaft clutch coupled to said system of staged planetary gears and an output shaft clutch;

a large high speed clutch wheel and a small low speed clutch wheel mounted loose on said output shaft clutch in order to provide two second transmission ratios;

a clutch coupling device in order to be able to couple one or the other of said low and high speed wheels with said output shaft clutch;

an output shaft comprising a small high speed output wheel meshing with said large high speed clutch wheel and a large low speed output wheel meshing with said small low speed clutch wheel; and

further comprising a decoupling device between said output shaft and said large low speed output wheel in order to be able to release said output shaft from said small low speed clutch wheel.

2. The gearbox unit according to claim 1, wherein said large low speed output wheel is mounted loose on said output shaft.

3. The gearbox unit according to claim 1, wherein said decoupling device comprises a fixed wheel integral with said output shaft and a coupling member integral with said fixed wheel able to be controlled in order to engage said fixed wheel and said large low speed output wheel.

4. The gearbox unit according to claim 1, wherein said clutch device comprises a clutch that can be controlled located between said input shaft clutch and said output shaft clutch.

5. The gearbox unit according to claim 1, further comprises comprising:

another clutch device comprising, another input shaft clutch coupled to said system of planetary gears and another output shaft clutch;

another large high speed clutch wheel and another small low speed clutch wheel mounted loose on said other output shaft clutch in order to be able to provide two other second transmission ratios, said other large and small high and low speed clutch wheels meshing respectively with said small and large high and low speed output wheels; and

,

another clutch coupling device in order to be able to couple one or the other of said other low and high speed wheels with said other output shaft clutch.

6. The gearbox unit according to claim 3, wherein said other clutch device comprises another clutch that can be controlled located between said other input shaft clutch and said other output shaft clutch.

7. The gearbox unit according to claim 1, further comprising an inverter module located between said system of staged planetary gears and said clutch device in order to be able to reverse the direction of rotation of said input shaft clutch.

8. The gearbox unit according to claim 7, wherein said inverter module comprises on the one hand a receiving shaft coupled to said system of staged planetary gears and on the other hand, two inversion wheels mounted loose on said receiving shaft and two inversion clutches in order to alternatively couple said two inversion wheels to said clutch device.

9. The gearbox unit according to claim 1, further comprising a transmission reducing module located between said system of staged planetary gears and said clutch device in order to be able to reduce the transmission ratios of said plurality of transmission ratios.

10. The gearbox unit according to claim 1, wherein said system of staged planetary gears comprises three sets of planetary gears and three sets of satellite gears mounted respectively in said three sets of planetary gears.