[특허]Transmission and gear changing method

Kyoto University

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Transmission and gear changing method

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16H-003/08
미국특허분류(USC)	074/325;
출원번호	US-0312512 (2007-11-15)
등록번호	US-8096202 (2012-01-17)
우선권정보	JP-2006-316164 (2006-11-22)
국제출원번호	PCT/JP2007/072215 (2007-11-15)
§371/§102 date	20090514 (20090514)
국제공개번호	WO2008/062718 (2008-05-29)
발명자 / 주소	Komori, Masaharu
출원인 / 주소	Kyoto University
대리인 / 주소	Kanesaka, Manabu
인용정보	피인용 횟수 : 1 인용 특허 : 3

초록
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A transmission and a gear changing method capable of changing a reduction ratio while a load is supported without stopping rotation, and transmitting a rotation angle accurately and power efficiently. First and second gear element pairs (16, 17) are arranged between an input member (12) and an output member (14) via first and second clutches (40, 42), and a non-circular gear pair (18) is arranged via a non-circular gear element pair-use clutch (44). The non-circular gear pair (18) includes between the input member (12) and the output member (14) a first meshing section where it has a ratio equal to a first reduction ratio when the first gear element pair (16) is coupled, and a second meshing section where it has a ratio equal to a second reduction ratio when the second gear element pair (17) is coupled. When the gear element pairs (16, 17) to be coupled between the input member (12) and the output member (14) are switched, the non-circular gear element pair (18) is coupled between the input member (12) and the output member (14) transitionally.

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1. A transmission comprising: a first gear element pair and a second gear element pair which are at least two sets of gear element pairs, the first gear element pair and the second gear element pair are respectively arranged between an input member and an output member supported rotatably;a first clutch and a second clutch which are at least two sets of clutches, the first clutch and the second clutch respectively couple at least two sets of the gear element pairs releasably between the input member and the output member;at least one set of a non-circular gear element pair which is arranged between the input member and the output member; andat least one set of a non-circular gear element pair-use clutch that couples at least one set of the non-circular gear element pair releasably between the input member and the output member, whereinthe non-circular gear element pair includes a first meshing section in which a reduction ratio between the input member and the output member becomes equal to a first reduction ratio in at least a partial meshing section of the first gear element pair when the first gear element pair is coupled between the input member and the output member, and a second meshing section in which a reduction ratio between the input member and the output member becomes equal to a second reduction ratio in at least a partial meshing section of the second gear element pair when the second gear element pair is coupled between the input member and the output member. 2. The transmission according to claim 1, comprising: at least three sets of the gear element pairs;at least three sets of the clutches;at least two sets of the non-circular gear element pairs; andat least two sets of the non-circular gear element pair-use clutches. 3. The transmission according to claim 1, wherein the gear element pair comprises a pair of circular gear elements which mesh with each other. 4. The transmission according to claim 1, wherein one of the gear elements of the gear element pair is supported to be in a relatively rotatable state by one of the input member and the output member,the other one of the gear elements of the gear element pair is fixed not to be in a relatively rotatable state to the other one of the input member and the output member,the clutch connects one of the gear elements of the gear element pair releasably to one of the input member and the output member,one of the non-circular gear elements of the non-circular gear element pair is supported to be in a relatively rotatable state by one of the input member and the output member,the other one of the non-circular gear elements of the non-circular gear element pair is fixed not to be in a relatively rotatable state to the other one of the input member and the output member at least when the gear element pair coupled between the input member and the output member is switched,the non-circular gear element pair-use clutch connects at least one of the non-circular gear elements of the non-circular gear element pair releasably to one of the input member and the output member, andat least one of the clutch and the non-circular gear element pair-use clutch is a positive clutch. 5. The transmission according to claim 1, further comprising: an actuator that respectively drives the clutch and the non-circular gear element pair-use clutch; anda control device that controls operations of the actuator. 6. The transmission according to claim 1, wherein slidingly-contact members are provided in parallel with the respective non-circular gear elements forming the non-circular gear element pair, andthe slidingly-contact members respectively rotate integrally with the respective non-circular gear elements, and outer circumferential surfaces thereof frictionally contact each other. 7. The transmission according to claim 1, wherein the non-circular gear element pair-use clutch is capable of simultaneously releasing both of a connection between the input member and the non-circular gear element pair and a connection between the non-circular gear element pair and the output member. 8. A gear changing method for changing a reduction ratio between an input member and an output member rotating, the gear changing method comprising: a first step of coupling a non-circular gear element pair between the input member and the output member in a state in which a first (or second) gear element pair meshing with each other at a first (or second) reduction ratio in at least a partial meshing section is coupled between the input member and the output member in a situation where the non-circular gear element pair and the first (or second) gear element pair simultaneously mesh respectively at the first (or second) reduction ratio;a second step of releasing the coupling of the first (or second) gear element pair between the input member and the output member while the non-circular gear element pair and the first (or second) gear element pair simultaneously continue meshing respectively at the first (or second) reduction ratio;a third step of coupling a second (or first) gear element pair meshing with each other at a second (or first) reduction ratio in at least a partial meshing section between the input member and the output member, in a state in which the non-circular gear element pair meshes with each other at the second (or first) reduction ratio in a situation where the non-circular gear element pair and the second (or first) gear element pair simultaneously mesh respectively at the second (or first) reduction ratio; anda fourth step of releasing the coupling of the non-circular gear element pair between the input member and the output member while the non-circular gear element pair and the second (or first) gear element pair simultaneously continue meshing respectively at the second (or first) reduction ratio. 9. The transmission according to claim 1, comprising: an input side speed-up and reduction gear device that connects so as to be capable of transmitting rotation between a first portion in the input member in which one of the gear elements of the gear element pair is arranged and a second portion in the input member in which one of the non-circular gear elements of the non-circular gear element pair is arranged; andan output side speed-up and reduction gear device that connects so as to be capable of transmitting rotation between a first portion in the output member in which the other one of the gear elements of the gear element pair is arranged and a second portion in the output member in which the other one of the non-circular gear elements of the non-circular gear element pair is arranged. 10. The transmission according to claim 1, wherein the clutch includes a one-way clutch. 11. The transmission according to claim 10, wherein the clutch that couples the gear element pair with a maximum reduction ratio among the gear element pairs releasably between the input member and the output member is a one-way clutch. 12. A transmission comprising: a first gear element pair and a second gear element pair which are at least two sets of gear element pairs, the first gear element pair and the second gear element pair are respectively arranged between an input member and an output member supported rotatably;a first clutch and a second clutch which are at least two sets of clutches, the first clutch and the second clutch respectively couple at least two sets of the gear element pairs releasably between the input member and the output member;at least one set of a non-circular gear element pair which is arranged between the input member and the output member;at least one set of a non-circular gear element pair-use clutch that couples at least one set of the non-circular gear element pair releasably between the input member and the output member;an input side speed-up and reduction gear device that connects so as to be capable of transmitting rotation between a first portion in the input member in which one of the gear elements of the gear element pair is arranged and a second portion in the input member in which one of the non-circular gear elements of the non-circular gear element pair is arranged; andan output side speed-up and reduction gear device that connects so as to be capable of transmitting rotation between a first portion in the output member in which the other one of the gear elements of the gear element pair is arranged and a second portion in the output member in which the other one of the non-circular gear elements of the non-circular gear element pair is arranged, whereinthe non-circular gear element pair includes a first meshing section in which a reduction ratio thereof becomes a first reduction ratio and a second meshing section in which a reduction ratio thereof becomes a second reduction ratio,a product of the first reduction ratio of the non-circular gear element pair, a reduction ratio of the input side speed-up and reduction gear device, and a reduction ratio of the output side speed-up and reduction gear device is equal to a reduction ratio in at least a partial meshing section of the first gear element pair when the first gear element pair is coupled between the input member and the output member, anda product of the second reduction ratio of the non-circular gear element pair, a reduction ratio of the input side speed-up and reduction gear device, and a reduction ratio of the output side speed-up and reduction gear device is equal to a reduction ratio in at least a partial meshing section of the second gear element pair when the second gear element pair is coupled between the input member and the output member.

이 특허에 인용된 특허 (3)

이 특허를 인용한 특허 피인용횟수: 1

Krajewski, Christian. Motor vehicle drive arrangement. USP2015069061586.

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Transmission and gear changing method

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