IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0669416
(1996-07-03)
|
우선권정보 |
ES-0002300 (1994-11-08) |
국제출원번호 |
PCT/ES95/00123
(1995-11-06)
|
§371/§102 date |
19960703
(19960703)
|
국제공개번호 |
WO-9614524
|
발명자
/ 주소 |
- Reboredo Elena Canosa (Calle Mayor de Serria 216 E-08017 Barcelona ESX)
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
3 |
초록
▼
A hydraulic variable speed drive assembly including a hydraulic pump having a cylinder with an associated end cover, a hydraulic motor having a cylinder with an associated end cover, and an intermediate plate with ports or passages for enabling a flow of fluid from the hydraulic pump to the hydrauli
A hydraulic variable speed drive assembly including a hydraulic pump having a cylinder with an associated end cover, a hydraulic motor having a cylinder with an associated end cover, and an intermediate plate with ports or passages for enabling a flow of fluid from the hydraulic pump to the hydraulic motor at a high pressure and from the hydraulic motor to the hydraulic pump at a low pressure, in order to close the circuit. The shafts of the rotors of the hydraulic pump and the hydraulic motor have a common geometric axis, static with respect to the outside, about which they can rotate independently, this rotation being their only possible movement. The variable drive assembly has as its only possible movement, the rotation about a geometric axis fixed with respect to the outside and is different from the geometric axis of the hydraulic pump cylinder, from the geometric axis of the hydraulic motor cylinder, and from the common geometric axis of the rotors. The rotation of the variable drive assembly is effected from the outside and results in that the hydraulic pump cylinder and the hydraulic motor cylinder approach or withdraw their geometric axes with respect to those of their corresponding rotors, thus causing variation of the ratio between the rotation speeds of the hydraulic pump rotor and of the hydraulic motor rotor.
대표청구항
▼
Variable speed drive assembly of the type that comprise an hydraulic pump and an hydraulic motor, in which the power transmission is achieved by means of a fluid circulating in close circuit between them, such that the flow rate displaced by the hydraulic pump must be received by the hydraulic motor
Variable speed drive assembly of the type that comprise an hydraulic pump and an hydraulic motor, in which the power transmission is achieved by means of a fluid circulating in close circuit between them, such that the flow rate displaced by the hydraulic pump must be received by the hydraulic motor and subsequently returned to the hydraulic pump, and in which both the hydraulic pump and the hydraulic motor are vane pumps, constituted by a cylinder (29,39) and a rotor (40,50) from which emerge radially vanes (41,51) which, by extending outwards to fit against the inner wall of said cylinder (29,39) and laterally to fit against two covers (30,55), form cells that are fluidtight from each other, one or both of said covers being provided with a central opening to let the shafts of the rotors (40,50) protrude outwards therethrough, any rotation ratio between the rotor (40) of the hydraulic pump and the rotor (50) of the hydraulic motor, between zero and a maximum value, being achieved by varying the eccentricity of the rotor (40) of the hydraulic pump, of the rotor (50) of the hydraulic motor or of both, characterized in that: the cylinder (29) of the hydraulic pump, the cylinder (39) of the hydraulic motor and their respective end covers (30,55) form an integral body constituting the variable drive assembly, the cylinders having geometric axes (65,66) that are parallel but not coincident, and the only possible movement of said variable drive assembly being rotation with respect to a third geometric axis (23) that is static with respect to a support member (10,11) and parallel to said geometric axes (65,66) of the cylinders; the rotor (40) of the hydraulic pump and the rotor (50) of the hydraulic motor have a common geometric axis (22), with a static and eccentric position with respect to said support member (10,11), parallel to the geometric axes (65,66) of the cylinders of the hydraulic pump and the hydraulic motor and displaced a distance (E) with respect to said third geometric axis (23), both rotors (40,50) being able to turn independently from each other with respect to said common geometric axis (22); the rotation of said variable drive assembly is actuated from the outside and causes, through a variation of the eccentricity of the rotors (40,50) with respect to their respective cylinders (29,39), the effect of variation of said rotation ratio between the rotor (40) of the hydraulic pump and the rotor (50) of the hydraulic motor, the position of the variable drive assembly with respect to said support member being defined by an angle aa0 corresponding to a starting position in which the cylinder (29) of the hydraulic pump and its rotor (40) are concentric.
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