Title:
POWER TRANSMISSION DEVICE
Document Type and Number:
Japanese Patent JP2017161005
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a power transmission device which can make transmission force (rotation force) of a power transmission device variable in the power transmission device having a magnet coupling.SOLUTION: In a device for transmitting power to a fuel pump or the like in an automobile, a pair of magnets 2, 3 are opposed to each other in a housing 1, a groove 13 is formed between one side magnet 2 and a disc 12 and steel spheres 15 connected by a garter spring 16 are arranged in the groove 13. When rotation number of an engine is increased and is increased to a pump rotation number more than necessary, a centrifugal force due to the rotation exceeds an elastic force of the garter spring 16, therefore, the steel spheres 15 are moved to the outer side of the groove 13 by the centrifugal force and the magnet 2 is moved in a separation direction with respect to the magnet 3 by a spring 11. Accordingly, a gap Sbetween the pair of magnets 2, 3 is widened, a magnetic attraction force between both magnets 2, 3 (magnet coupling) is decreased, an allowable transmission torque of the magnet coupling is also decreased and rotation speed of the pump (output shaft 5) is suppressed.SELECTED DRAWING: Figure 4
Inventors:
SAITO TAKAHIDE
SATO KOJI
KAWAI MASAHIRO
SATO KOJI
KAWAI MASAHIRO
Application Number:
JP2016046748A
Publication Date:
September 14, 2017
Filing Date:
March 10, 2016
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F16H49/00; F16D1/06; F16D7/02; F16D43/10
Attorney, Agent or Firm:
Naoya Kamata
Bunji Kamada
Yaichiro Nakatani
Takayoshi Tagawa
Takashi Shimizu
Bunji Kamada
Yaichiro Nakatani
Takayoshi Tagawa
Takashi Shimizu