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Title:
DIVIDING WALL MEMBER FOR PRIMARY PULLEY IN BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2018/151000
Kind Code:
A1
Abstract:
The present invention relates to the improvement of a dividing wall for a primary pulley in a belt-type continuously variable transmission, and the purpose of the invention is to reduce costs by obtaining the intended strength characteristics without implementing a soft nitriding treatment. A dividing wall member, which together with a movable sheave forms a hydraulic pressure chamber, is provided with a small-diameter annular disc 32 extended in a radial direction from a center tubular part mounted to a rotating shaft, and a part in the small-diameter annular disc 32 that connects with an intermediate body part 34 forms a bent part 38 that is bent at approximately 90 degrees. The inner peripheral surface of the bent part 38 in cross section is configured from an inner-diameter-side arc 40-1 having a radius of curvature R1 of which the center position is O1, an outer-diameter-side arc 40-2 having a position different from the first inner-diameter-side arc 40-1 as a center O2 and a radius of curvature R2 having a different value from the radius of curvature R1 of the inner-diameter-side arc 40-1, and an intermediate part 40-3 that smoothly connects the inner-diameter-side arc 40-1 and the outer-diameter-side arc 40-2. A stress value produced in a concave surface 40 when a load is exerted on the dividing wall member can be reduced, and the intended durability can be obtained without performing a soft nitriding treatment on the dividing wall member.

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Inventors:
FURUYA, Nobuhiko (19-1 Aoba-ch, Fuji-shi Shizuoka 47, 〒4170047, JP)
MIWA, Masamichi (19-1 Aoba-ch, Fuji-shi Shizuoka 47, 〒4170047, JP)
ICHIKAWA, Toshiyuki (19-1 Aoba-ch, Fuji-shi Shizuoka 47, 〒4170047, JP)
FUKUMOTO, Katsuyo (19-1 Aoba-ch, Fuji-shi Shizuoka 47, 〒4170047, JP)
SUGISAWA, Yosuke (19-1 Aoba-ch, Fuji-shi Shizuoka 47, 〒4170047, JP)
KAJI, Susumu (19-1 Aoba-ch, Fuji-shi Shizuoka 47, 〒4170047, JP)
Application Number:
JP2018/004348
Publication Date:
August 23, 2018
Filing Date:
February 08, 2018
Export Citation:
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Assignee:
UNIPRES CORPORATION (SUN HAMADA BLDG. 5F, 1-19-20 Shin-Yokohama, Kohoku-k, Yokohama-shi Kanagawa 33, 〒2220033, JP)
International Classes:
F16H9/18
Domestic Patent References:
WO2015146616A12015-10-01
Foreign References:
JP2015183753A2015-10-22
JP2005533227A2005-11-04
JP2017015116A2017-01-19
Attorney, Agent or Firm:
MITSUI, Takao (D-201, Villa Sennichi 1716-7 Imaizum, Fuji-shi Shizuoka 01, 〒4170001, JP)
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