In an electromagnetic clutch apparatus for forming a magnetic path in a circulating shape by an electromagnet at a pilot clutch alternately arranged with a main outer plate and a main inner plate and capable of controlling to transmit a torque between a clutch housing and a cam plate by being engage
In an electromagnetic clutch apparatus for forming a magnetic path in a circulating shape by an electromagnet at a pilot clutch alternately arranged with a main outer plate and a main inner plate and capable of controlling to transmit a torque between a clutch housing and a cam plate by being engaged in an axial direction and at a surrounding of a nonmagnetic portion continuously formed in the axial direction of a middle portion in a diameter direction of the pilot clutch to carry out an engaging, the nonmagnetic portion is formed by through holes in a circular arc shape having bridge portions for maintaining a shape in a diameter direction of the pilot clutch therebetween in a peripheral direction, and the bridge portion is divided in the diameter direction of the pilot clutch and a nonmagnetic member is interposed between divisions thereof.
대표청구항▼
What is claimed is: 1. An electromagnetic clutch apparatus comprising: a multiplates clutch including an outer plate and an inner plate alternately arranged, and configured to control a torque transmission between rotating members by engaging the outer plate and the inner plate in an axial directio
What is claimed is: 1. An electromagnetic clutch apparatus comprising: a multiplates clutch including an outer plate and an inner plate alternately arranged, and configured to control a torque transmission between rotating members by engaging the outer plate and the inner plate in an axial direction; and a nonmagnetic portion formed continuously along the axial direction and at a middle portion in a diameter direction of the multiplates clutch to form a magnetic path of an electromagnet surrounding the nonmagnetic portion in a circulating shape, wherein the multiplates clutch is divided in the diameter direction into at least two parts, wherein a nonmagnetic member is interposed between the parts to form the nonmagnetic portion, and wherein one of the outer plate and the inner plate is divided in a plate thickness direction and in a diameter direction into an outer diameter portion and an inner diameter portion, the outer diameter portion includes an outer diameter side piece, and the inner diameter portion includes an inner diameter side piece, the outer diameter side piece and the inner diameter side piece are opposed to each other in the axial direction, and the nonmagnetic member is interposed between the outer diameter side piece and the inner diameter side piece to integrate the outer diameter portion and the inner diameter portion. 2. The electromagnetic clutch apparatus according to claim 1, wherein the nonmagnetic portion comprises a plurality of bridge portions provided at the middle portion in the diameter direction and a plurality of through holes provided between the bridge portions in a peripheral direction of the multiplates clutch, and the bridge portions are constituted by the nonmagnetic member. 3. The electromagnetic clutch apparatus according to claim 1, wherein the nonmagnetic member is provided on at least one of the outer plate and the inner plate. 4. The electromagnetic clutch apparatus according to claim 1, wherein the inner diameter side piece is formed partially in the peripheral direction on an outer circumference of the inner diameter portion, and the outer diameter side piece is formed partially in the peripheral direction on an inner circumference of the outer diameter portion. 5. The electromagnetic clutch apparatus according to claim 1, wherein the inner diameter side piece is formed throughout a whole circumference of an outer circumference of the inner diameter portion, and the outer diameter side piece is formed throughout a whole circumference of an inner circumference of the outer diameter portion. 6. The electromagnetic clutch apparatus according to claim 1, wherein at least one surface in the axial direction of one of the outer diameter side piece and the inner diameter side piece is recessed from a sliding surface of the one of the outer plate and the inner plate. 7. The electromagnetic clutch apparatus according to claim 1, wherein a notched portion is provided on at least one of the outer diameter portion and the inner diameter portion, so that a space for restraining the outer plate and the inner plate from being stuck to each other by interposing air in the notched portion. 8. The electromagnetic clutch apparatus according to claim 1, wherein the nonmagnetic member interposed between the parts are coupled to the parts by a diffusion sintering coupling so to integrate the parts. 9. A clutch plate comprising: an inner diameter portion; an outer diameter portion disposed on an outer diameter side of the inner diameter portion; and a nonmagnetic member interposed between the inner diameter portion and the outer diameter portion, wherein the inner diameter portion and the outer diameter portion are not directly in contact with each other, and wherein the clutch plate is divided in a plate thickness direction and in a diameter direction at a middle portion in the diameter direction into the outer diameter portion and the inner diameter portion, the outer diameter portion includes an outer diameter side piece on an inner circumference of the outer diameter portion, and the inner diameter portion includes an inner diameter side piece on an outer circumference of the inner diameter portion, the outer diameter side piece and the inner diameter side piece are opposed to each other in an axial direction, and the nonmagnetic member is interposed between the outer diameter side piece and the inner diameter side piece. 10. The clutch plate according to claim 9, wherein the inner diameter side piece is formed partially in a peripheral direction on the outer circumference of the inner diameter portion, and the outer diameter side piece is formed partially in a peripheral direction on the inner circumference of the outer diameter portion. 11. The clutch plate according to claim 9, wherein the inner diameter side piece is formed throughout a whole circumference of the outer circumference of the inner diameter portion, and the outer diameter side piece is formed throughout a whole circumference of the inner circumference of the outer diameter portion. 12. The clutch plate according to claim 9, wherein at least one surface in the axial direction of one of the outer diameter side piece and the inner diameter side piece is recessed from a sliding surface of the clutch plate. 13. The clutch plate according to claim 9, wherein a notched portion is provided on at least one of the outer diameter portion and the inner diameter portion. 14. The clutch plate according to claim 9, wherein the nonmagnetic member are coupled to the outer diameter portion and the inner diameter portion by a diffusion sintering coupling. 15. The clutch plate according to claim 9, wherein the nonmagnetic member and the inner diameter portion are coupled via diffusion sintering, and the nonmagnetic member and the outer diameter portion are coupled via diffusion sintering.
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이 특허에 인용된 특허 (5)
Ando,Junji; Sakai,Naoyuki; Tashiro,Akiyoshi, Drive power transmission device.
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