Electromagnetic clutch
| Title: | Electromagnetic clutch |
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| Patent Number: | 7,845,479 |
| Publication Date: | December 07, 2010 |
| Appl. No: | 12/098675 |
| Application Filed: | April 07, 2008 |
| Abstract: | An electromagnetic clutch is provided with: a clutch hub which is connected to a shaft member (one of a pair of rotation members); a clutch housing which is connected to a hollow shaft (the other of a pair of rotation members); a rotor which is connected to the clutch housing; a main clutch (clutch member) which is disposed between the clutch hub and the clutch housing; and an electromagnet which operates the main clutch. An end surface of the clutch housing and an end surface of a core of the electromagnet are disposed to be opposed to each other with the rotor interposed therebetween in an axial direction. The end of the rotor in a side of the clutch housing is formed with an extension portion which extends to the clutch housing in the axial direction. An outer periphery of the clutch housing is connected to the extension portion through a connection portion. The connection portion is disposed outside the main clutch in a radial direction. |
| Inventors: | Ochiai, Tomiaki (Tochigi, JP); Iizuka, Koji (Tochigi, JP); Sayama, Masayuki (Tochigi, JP) |
| Assignees: | GKN Driveline Torque Technology KK (Tochigi-Ken, JP) |
| Claim: | 1. An electromagnetic clutch comprising: a clutch hub connected to one of a pair of rotation members; a clutch housing connected to the other of the pair of rotation members; a rotor connected to the clutch housing; a clutch member disposed between the clutch hub and the clutch housing; and an electromagnet that operates the clutch member, wherein an end surface of the clutch housing and an end surface of a core of the electromagnet are disposed to be opposed to each other with the rotor interposed therebetween in an axial direction, wherein the rotor has an extension portion extending to the clutch housing in the axial direction at an end of the rotor on a side of the clutch housing, wherein the extension portion is connected to an outer periphery of the clutch housing through a connection portion, and wherein the connection portion is disposed outside the clutch member in a radial direction. |
| Claim: | 2. The electromagnetic clutch according to claim 1 , wherein an air gap through which magnetic lines of the electromagnet pass is disposed between an inner periphery or the end surface of the core of the electromagnet and the rotor. |
| Claim: | 3. The electromagnetic clutch according to claim 1 , wherein the connection portion is configured by screw-connecting a screw portion formed in the extension portion to a screw portion formed in the outer periphery of the clutch housing. |
| Claim: | 4. The electromagnetic clutch according to claim 1 , further comprising: a screw member disposed at a front end of the extension portion. |
| Claim: | 5. The electromagnetic clutch according to claim 1 , further comprising: a seal member disposed between the rotor and an outer peripheral portion of the end surface of the clutch housing. |
| Claim: | 6. The electromagnetic clutch according to claim 5 , further comprising: a pilot clutch configured to be operated by the electromagnet and disposed in a position where the seal member is disposed in the clutch housing. |
| Claim: | 7. The electromagnetic clutch according to claim 1 , wherein the electromagnet includes an electromagnetic coil, and wherein the core has an opening in one side of the core in the axial direction which opens to a side of the clutch member, and the electromagnet coil is surrounded by the core on inner and outer sides of the electromagnet coil in a radial direction and on the other side of the core in the axial direction. |
| Claim: | 8. An electromagnetic clutch comprising: a clutch hub connected to one of a pair of rotation members; a clutch housing connected to the other of the pair of rotation members; a rotor connected to the clutch housing; a clutch member disposed between the clutch hub and the clutch housing; and an electromagnet that operates the clutch member, wherein an end surface of the clutch housing and an end surface of a core of the electromagnet are disposed to be opposed to each other with the rotor interposed therebetween in an axial direction, wherein the rotor has an extension portion extending to the clutch housing in the axial direction at an end of the rotor on a side of the clutch housing, wherein the extension portion is connected to an outer periphery of the clutch housing through a connection portion, wherein the connection portion is disposed outside the clutch member in a radial direction. wherein an air gap through which magnetic lines of the electromagnet pass is disposed between an inner periphery or the end surface of the core of the electromagnet and the rotor, wherein the connection portion is configured by screw-connecting a screw portion formed in the extension portion to a screw portion formed in the outer periphery of the clutch housing, wherein a screw member is disposed at a front end of the extension portion, wherein a seal member is disposed between the rotor and an outer peripheral portion of the end surface of the clutch housing, wherein a pilot clutch configured to be operated by the electromagnet is disposed in a position where the seal member is disposed in the clutch housing, wherein the electromagnet includes an electromagnetic coil, and wherein the core has an opening in one side of the core in the axial direction which opens to a side of the clutch member, and the electromagnet coil is surrounded by the core on inner and outer sides of the electromagnet coil in a radial direction and on the other side of the core in the axial direction. |
| Current U.S. Class: | 192/35 |
| Patent References Cited: | 6837351 January 2005 Showalter et al. 6997294 February 2006 Ochiai et al. 2000-240684 September 2000 |
| Other References: | esp@cenet patent abstract for Japanese Publication No. 2000240684, Publication date Sep. 5, 2000 (1 page). cited by other |
| Primary Examiner: | Lorence, Richard M. |
| Attorney, Agent or Firm: | Osha Liang LLP |
| Accession Number: | edspgr.07845479 |
| Database: | USPTO Patent Grants |
| Language: | English |
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