Title:
TWO-SPEED TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2023/188281
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a two-speed transmission with a small number of components, that can prevent a glitch. According to a two-speed transmission (100) of the present invention, in a first state of a ball cam mechanism, a first friction engagement mechanism (10) disposed between an unrotatably fixed case (50) and a hub (60) including a ring gear (36) is in a fastened state to unrotatably fix the ring gear (36), whereby torque from an input shaft (52) can be transmitted to an output shaft (62) as torque by revolution from a sun gear (32) to a pinion gear (34). In a second state, the first friction engagement mechanism (10) is in a released state to make the ring gear (36) run idle, and the pinion gear (34) rotates instead of revolving even when the input shaft (52) rotates, whereby the torque from the input shaft (52) is not transmitted to the output shaft (62). In a third state, a second friction engagement mechanism (20) is in a fastened state to fasten the ring gear (36) and a pinion carrier (35), permitting torque from the input shaft (52) to be transmitted to the output shaft (62) at constant velocity, whereby a ball cam mechanism (40) employing one rotating body (43) in a radial direction can shift the rotating speed of the output shaft (62) in two stages. Due to the second state as a neutral state being interposed between the first state and the third state, the number of components can be relatively reduced and a glitch can be easily prevented.
Inventors:
SATO MASATOSHI (JP)
Application Number:
PCT/JP2022/016550
Publication Date:
October 05, 2023
Filing Date:
March 31, 2022
Export Citation:
Assignee:
DYNAX CORP (JP)
International Classes:
B60K6/365; F16H3/44
Domestic Patent References:
| WO2020084913A1 | 2020-04-30 |
Foreign References:
| JPS62200844U | 1987-12-21 | |||
| CN108443434A | 2018-08-24 | |||
| JP2021014198A | 2021-02-12 |
Attorney, Agent or Firm:
KIKEGAWA Takumi et al. (JP)
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