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AssigneeTochigi Fuji Sangyo Kabushiki Kaisha
InventorsYasuhiko Ishikawa, Makoto Ishizuka, Yoshiyuki Nakabayashi, Kouji Iizuka, Yasushi Koshigaya, Yoshiaki Kitsunezuka, Kenji Karasawa, Masayuki Sayama
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A wet type friction clutch and an electromagnetic clutch is disclosed wherein a pilot clutch 61 is disposed in a magnetic flux path 95 of an electromagnet 57 and is kept between an armature 71 and the electromagnet 57. Upon excitation of the electromagnet 57, the armature 57 is retracted to allow the pilot clutch 61 to be coupled. The pilot clutch 61 includes a plurality of clutch plates 87, 89 which are interleaved with respect to one another for sliding movements. Adjacent clutch plates 87, 87A, 87B, 89, 89A, 89B, 89C, 89D, 89E, 89F are formed with oil guide passageways 86, 96, 98, 106, 108, 110, 114 to create a hydrodynamic pressure effect to allow the clutch plates to be separated with a limited drag torque. Further, the clutch plate has magnetic flux path forming portions 89b, 89c, at inner and outer peripheral sides, between which through-bores 112 are formed to allow bridge portions 120 to be intervened between the through-bores, with each of the bridge portions being configured such that opposing walls of the bridge portions of adjacent clutch plates have reduced contact surface areas to eliminate a leakage of a magnetic flux.
A wet type friction clutch operatively disposed between first and second torque transmission components, comprising:
A wet type friction clutch operatively disposed between first and second torque transmission components, comprising:
A wet type friction clutch according to claim the first oil guide passageway has an end portion formed with an extension which radially extends outward and terminates in an area outside an area in which the second oil guide passageway is formed.
A clutch plate for an electromagnetic clutch having a group of clutch plates including first clutch plates disposed for rotation with a drive shaft and second clutch plates interleaved with the first clutch plates and disposed for rotation with a driven shaft, an electromagnet disposed at one side of the group of clutch plates, and an armature disposed at the other side of the group of clutch plates to be retracted by an electromagnetic force generated by the electromagnet for thereby causing the group of clutch plates to be brought into pressured contact such that the clutch plates are coupled, wherein the clutch plate has a plurality of through-bores, formed along a circumferential periphery of the clutch plate in alignment with a magnetic flux path forming portion which establishes a magnetic flux path generated by the electromagnet, between which a bridge portion is intervened for interconnecting an inner circumferential periphery and an outer circumferential periphery of the clutch plate, the clutch plate comprising:
A clutch plate for an electromagnetic clutch having a group of clutch plates including first clutch plates disposed for rotation with a drive shaft and second clutch plates interleaved with the first clutch plates and disposed for rotation with a driven shaft, an electromagnetic coil disposed at one side of the group of clutch plates, and an armature disposed at the other side of the group of clutch plates to be retracted by an electromagnetic force generated by the electromagnetic coil for thereby causing the group of clutch plates to be brought into pressured contact such that the clutch plates are coupled, wherein the clutch plate has a plurality of through-bores, formed along a circumferential periphery of the clutch plate in alignment with a magnetic flux path forming portion which establishes a magnetic flux path generated by the electromagnetic coil, between which a bridge portion is intervened for interconnecting an inner circumferential periphery and an outer circumferential periphery of the clutch plate, the clutch plate comprising:
Dependencies are inferred from the claim text.