Title:
EDDY CURRENT REDUCING GEAR
Document Type and Number:
Japanese Patent JP3882404
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain an eddy current reducing gear, capable of increasing the number of eddy currents generated in a brake drum and consequently magnifying braking torque by increasing the flow channels of magnetic flux formed between magnet side and the inside circumference of the brake drum.
SOLUTION: This eddy current reduction gear is provided with a brake drum 7, a case that includes an outside circumferential wall 12b in proximity to the inside circumferential surface of the brake drum 7, a support cylinder 20 of a nonmagnetic material supported inside the case, a plurality of magnets 22 that are supported by the support cylinder 20 at an interval in the circumferential direction and have magnetic pole surfaces at both ends of the circumferential direction, and a pair of ferromagnetic members 24 provided on the outside circumferential wall 12b, such that opposing surfaces are formed between each of the magnetic pole surfaces for each magnet 22. Each of the ferromagnetic members 24 has two opposing surfaces 24a, that are divided in the circumferential direction by a part of the outside circumferential wall 12b to face the inside circumferential surface of the brake drum 7.
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Inventors:
Narumi Reitoshi
Shin Kobayashi
Shin Kobayashi
Application Number:
JP18932399A
Publication Date:
February 14, 2007
Filing Date:
July 02, 1999
Export Citation:
Assignee:
Isuzu Motors Limited
International Classes:
H02K49/02; (IPC1-7): H02K49/02
Domestic Patent References:
| JP5015141A | ||||
| JP7027291U | ||||
| JP9275672A | ||||
| JP4161053A |
Attorney, Agent or Firm:
Naozumi Ono