Actuator for viscous clutch with magnetic oil circulation valve
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16D-035/02
F16D-035/00
F16K-031/02
출원번호
US-0884282
(2004-07-02)
우선권정보
EP-03015180(2003-07-04)
발명자
/ 주소
Tilly,Christian
출원인 / 주소
BorgWarner Inc.
대리인 / 주소
Artz & Artz, P.C.
인용정보
피인용 횟수 :
4인용 특허 :
8
초록▼
An actuator which, by a movement of a component which is generated by means of an electric current, can effect control of another component in a mechanical environment having rotating parts which are housed in a very small space. A rotating element, for example a clutch shaft (1; 21), is hollow, and
An actuator which, by a movement of a component which is generated by means of an electric current, can effect control of another component in a mechanical environment having rotating parts which are housed in a very small space. A rotating element, for example a clutch shaft (1; 21), is hollow, and an electromagnetic coil arrangement (7; 24) is housed in this cavity in such a way that the excitation of the coil is converted into a mechanical displacement of a component arranged outside the clutch shaft, for example of a sleeve sliding axially on the clutch shaft. For this purpose, parts of the clutch shaft are made ferromagnetic and are integrated in the magnetic loop of the coil (7; 24). The actuator according to the invention can be used, for example, in a viscous clutch for controlling the throughput of shear medium.
대표청구항▼
What is claimed is: 1. Actuator for actuating a valve for controlling the oil throughput of a viscous clutch, this actuator cooperating functionally with a clutch shaft (1; 21) of the viscous clutch, the actuator comprising: a solenoid coil (7; 24) which is mounted by means of a bearing (13; 29) wi
What is claimed is: 1. Actuator for actuating a valve for controlling the oil throughput of a viscous clutch, this actuator cooperating functionally with a clutch shaft (1; 21) of the viscous clutch, the actuator comprising: a solenoid coil (7; 24) which is mounted by means of a bearing (13; 29) within a hollow cylindrical region of the clutch shaft and permitting a rotation of the solenoid coil relative to the clutch shaft (1; 21); means (1a, 3, 4, 5, 8, 9) on the solenoid coil and the clutch shaft for communicating a control activity of the solenoid coil from inside the hollow cylindrical region to the valve located outside the hollow cylindrical region; and a sleeve member for executing a movement by said solenoid coil, said sleeve member being slidably positioned outside said clutch shaft. 2. Actuator according to claim 1, characterized in that regions of the clutch shaft (1; 3) and the moveable sleeve member (4) are part of the magnetic loop of the solenoid coil ( 7). 3. Actuator according to claim 2, characterized in that the solenoid coil (7; 24) is mounted on a stationary coil axle (8; 25) and that the outer contour of the coil axle ( 8; 25) carries the inner contour of a ball bearing (13; 29) which rests with its outer contour on the inner surface of the hollow cylindrical clutch shaft (1; 21) in order thus to ensure a relative rotation between coil axle and clutch shaft. 4. Actuator according to claim 2, characterized in that the clutch shaft (1) comprises a hollow cylindrical main shaft ( 1) of ferromagnetic material, a pot-like shaft front pan (3) of ferromagnetic material and a nonmagnetic intermediate part (2) which is arranged axially between main part and shaft front pan. 5. Actuator according to claim 3, characterized in tat the clutch shaft (1) comprises a hollow cylindrical main shaft ( 1) of ferromagnetic material, a pot-like shaft front part (3) of ferromagnetic material and a nonmagnetic intermediate part (2) which is arranged axially between main pan and shaft front part. 6. Actuator according to claim 4, characterized in tat said sleeve member (4) is arranged outside the hollow cylindrical main shaft (1) in such a way that it extends over the nonmagnetic part (2), and, in one of its end positions, it has a considerable overlap with one of the two ferromagnetic parts (3) and little or no overlap with the other of the two ferromagnetic parts (1a ), whereas, in the other end position, it has substantially equal overlaps with both ferromagnetic pans (3, 1a) of the clutch shaft. 7. Actuator according to claim 4, characterized in that the main shaft (1a), intermediate part (2) and shaft front pan (3) are screwed or welded to one another. 8. Actuator according to claim 5, characterized in that the main shaft (1a), intermediate part (2) and shaft front part (3) are screwed or welded to one another. 9. Actuator according to claim 1 characterized in that the movable component is formed by a pot-like shaft front part (21 b) whose sleeve like region (22) encloses a cylindrical part (21a) of the clutch shaft (21). 10. Actuator according to claim 1, characterized in that the sleeve member (4; 21b) is pretensioned by means of a spring (31) in one of two end positions. 11. A viscous clutch having an actuator according to claim 1.
Stagg, Jonathan B.; Settineri, Samuel E., Apparatus employing shear forces to transmit energy having flow altering structures configured to increase heat rejection from a working fluid and related method.
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