AUTOMATIC TRANSMISSION DEVICE

• US 20150148180A1
• Filed: 02/27/2013
• Published: 05/28/2015
• Est. Priority Date: 03/28/2012
• Status: Abandoned Application

• Current Assignee: Aisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Otake, Masahiro, Souda, Toru, Kasuya, Satoru, Ike, Nobukazu, Kato, Hiroshi, Oita, Shinji, Morise, Masaru
• Application Number:
  US14/380,628
• Publication Number:
  US 20150148180A1
• Time in Patent Office: Days
• US Class Current: 475/276
• CPC Class Codes: F16H 2003/442 comprising two or more sets of orbital gears arranged in a single plane
• CPC Class Codes: F16H 2003/445 without permanent connection between the input and the set of orbital gears
• CPC Class Codes: F16H 2200/0065 the gear ratios comprising nine forward speeds
• CPC Class Codes: F16H 2200/0082 characterised by the number of reverse speeds
• CPC Class Codes: F16H 2200/2012 with four sets of orbital gears
• CPC Class Codes: F16H 2200/2046 with six engaging means
• CPC Class Codes: F16H 2200/2064 using at least one positive clutch, e.g. dog clutch
• CPC Class Codes: F16H 3/66 composed of a number of gear trains without drive passing from one train to another

Abstract

An automatic transmission device configured to change the relative speeds between an input and output member. The automatic transmission is configured with four planetary gear mechanisms and a plurality of clutches and brakes, the arrangement being configured so as to reduce a loss due to the meshing between gears. The automatic transmission is configured with a first planetary gear mechanism including first to third rotary elements. A second planetary gear mechanism including fourth to sixth rotary elements, a third planetary gear mechanism including seventh to ninth rotary elements, and a fourth planetary gear mechanism including tenth to twelfth rotary elements. A first coupling element that couples the first, fifth and ninth rotary elements, a second coupling element that couples the second and twelfth, rotary elements, a third coupling element that couples the third and eleventh, and a fourth coupling element that couples the sixth and eighth elements to each other.

Claims

1-6. -6. (canceled)

7. An automatic transmission device that changes a speed of power input to an input member to output the power to an output member, characterized by comprising:

a first planetary gear mechanism including first to third rotary elements that form a sequence of the first rotary element, the second rotary element, and the third rotary element when arranged in an order at intervals corresponding to gear ratios in a velocity diagram;

a second planetary gear mechanism including fourth to sixth rotary elements that form a sequence of the fourth rotary element, the fifth rotary element, and the sixth rotary element when arranged in an order at intervals corresponding to gear ratios in a velocity diagram;

a third planetary gear mechanism including seventh to ninth rotary elements that form a sequence of the seventh rotary element, the eighth rotary element, and the ninth rotary element when arranged in an order at intervals corresponding to gear ratios in a velocity diagram;

a fourth planetary gear mechanism including tenth to twelfth rotary elements that form a sequence of the tenth rotary element, the eleventh rotary element, and the twelfth rotary element when arranged in an order at intervals corresponding to gear ratios in a velocity diagram;

a first coupling element that couples the first rotary element, the fifth rotary element, and the ninth rotary element to each other;

a second coupling element that couples the second rotary element and the twelfth rotary element to each other;

a third coupling element that couples the third rotary element and the eleventh rotary element to each other;

a fourth coupling element that couples the sixth rotary element and the eighth rotary element to each other;

a first clutch that engages and disengages the second coupling element and the input member with and from each other;

a second clutch that engages and disengages the fourth coupling element and the input member with and from each other;

a third clutch that engages and disengages the seventh rotary element and the input member with and from each other;

a first brake that is disengageably engaged so as to hold the fourth coupling element stationary with respect to an automatic transmission device case;

a second brake that is disengageably engaged so as to hold the fourth rotary element stationary with respect to the automatic transmission device case; and

a third brake that is disengageably engaged so as to hold the tenth rotary element stationary with respect to the automatic transmission device case, wherein

the output member is connected to the third coupling element.

8. The automatic transmission device according to claim 7, wherein:

a first forward speed is established by engaging the third clutch, the second brake, and the third brake and disengaging the first clutch, the second clutch, and the first brake;

a second forward speed is established by engaging the second clutch, the second brake, and the third brake and disengaging the first clutch, the third clutch, and the first brake;

a third forward speed is established by engaging the second clutch, the third clutch, and the third brake and disengaging the first clutch, the first brake, and the second brake;

a fourth forward speed is established by engaging the first clutch, the second clutch, and the third brake and disengaging the third clutch, the first brake, and the second brake;

a fifth forward speed is established by engaging the first clutch, the second clutch, and the third clutch and disengaging the first brake, the second brake, and the third brake;

a sixth forward speed is established by engaging the first clutch, the second clutch, and the second brake and disengaging the third clutch, the first brake, and the third brake;

a seventh forward speed is established by engaging the first clutch, the third clutch, and the second brake and disengaging the second clutch, the first brake, and the third brake;

an eighth forward speed is established by engaging the first clutch, the first brake, and the second brake and disengaging the second clutch, the third clutch, and the third brake;

a ninth forward speed is established by engaging the first clutch, the third clutch, and the first brake and disengaging the second clutch, the second brake, and the third brake; and

a reverse speed is established by engaging the third clutch, the first brake, and the third brake and disengaging the first clutch, the second clutch, and the second brake.

9. The automatic transmission device according to claim 7, wherein:

the first planetary gear mechanism, the second planetary gear mechanism, the third planetary gear mechanism, and the fourth planetary gear mechanism are each constituted as a single-pinion planetary gear mechanism in which a sun gear, a ring gear, and a carrier are used as the three rotary elements;

the first rotary element, the fourth rotary element, the seventh rotary element, and the tenth rotary element are each a sun gear;

the second rotary element, the fifth rotary element, the eighth rotary element, and the eleventh rotary element are each a carrier; and

the third rotary element, the sixth rotary element, the ninth rotary element, and the twelfth rotary element are each a ring gear.

10. The automatic transmission device according to claim 8, wherein:

the first planetary gear mechanism, the second planetary gear mechanism, the third planetary gear mechanism, and the fourth planetary gear mechanism are each constituted as a single-pinion planetary gear mechanism in which a sun gear, a ring gear, and a carrier are used as the three rotary elements;

the first rotary element, the fourth rotary element, the seventh rotary element, and the tenth rotary element are each a sun gear;

the second rotary element, the fifth rotary element, the eighth rotary element, and the eleventh rotary element are each a carrier; and

the third rotary element, the sixth rotary element, the ninth rotary element, and the twelfth rotary element are each a ring gear.

11. The automatic transmission device according to claim 7, wherein

the first planetary gear mechanism is provided on an outer peripheral side of the third planetary gear mechanism.

12. The automatic transmission device according to claim 8, wherein

the first planetary gear mechanism is provided on an outer peripheral side of the third planetary gear mechanism.

13. The automatic transmission device according to claim 9, wherein

the first planetary gear mechanism is provided on an outer peripheral side of the third planetary gear mechanism.

14. The automatic transmission device according to claim 10, wherein

the first planetary gear mechanism is provided on an outer peripheral side of the third planetary gear mechanism.

15. The automatic transmission device according claim 7, wherein

the planetary gear mechanisms are disposed in an order of the second planetary gear mechanism, the first planetary gear mechanism and the third planetary gear mechanism, and the fourth planetary gear mechanism.

16. The automatic transmission device according to claim 8, wherein

the planetary gear mechanisms are disposed in an order of the second planetary gear mechanism, the first planetary gear mechanism and the third planetary gear mechanism, and the fourth planetary gear mechanism.

17. The automatic transmission device according to claim 9, wherein

the planetary gear mechanisms are disposed in an order of the second planetary gear mechanism, the first planetary gear mechanism and the third planetary gear mechanism, and the fourth planetary gear mechanism.

18. The automatic transmission device according to claim 10, wherein

the planetary gear mechanisms are disposed in an order of the second planetary gear mechanism, the first planetary gear mechanism and the third planetary gear mechanism, and the fourth planetary gear mechanism.

19. The automatic transmission device according to claim 11, wherein

the planetary gear mechanisms are disposed in an order of the second planetary gear mechanism, the first planetary gear mechanism and the third planetary gear mechanism, and the fourth planetary gear mechanism.

20. The automatic transmission device according to claim 12, wherein

the planetary gear mechanisms are disposed in an order of the second planetary gear mechanism, the first planetary gear mechanism and the third planetary gear mechanism, and the fourth planetary gear mechanism.

21. The automatic transmission device according to claim 13, wherein

the planetary gear mechanisms are disposed in an order of the second planetary gear mechanism, the first planetary gear mechanism and the third planetary gear mechanism, and the fourth planetary gear mechanism.

22. The automatic transmission device according to claim 14, wherein

the planetary gear mechanisms are disposed in an order of the second planetary gear mechanism, the first planetary gear mechanism and the third planetary gear mechanism, and the fourth planetary gear mechanism.

23. The automatic transmission device according to claim 7, wherein

the third brake is constituted as a dog brake.

24. The automatic transmission device according to claim 8, wherein

the third brake is constituted as a dog brake.

25. The automatic transmission device according to claim 9, wherein the third brake is constituted as a dog brake.

26. The automatic transmission device according to claim 11, wherein

the third brake is constituted as a dog brake.