초록 ▼

A reduction apparatus comprises a case having case parts assembled to define a receiving space; a fixed ring gear coupled to the case parts; an output member having an output ring gear having a gear ratio and a module which are different from those of the fixed ring gear and an output shaft projecti

A reduction apparatus comprises a case having case parts assembled to define a receiving space; a fixed ring gear coupled to the case parts; an output member having an output ring gear having a gear ratio and a module which are different from those of the fixed ring gear and an output shaft projecting out of the case; a carrier having a first carrier member which has a guide projection and an input shaft-guiding groove and a second carrier member which defines together with the first carrier member an accommodating space; an input shaft having a shaft portion, a first sun gear and a second sun gear which are located between the first and second carrier members; first planetary gears fitted around first connecting members and meshed with the first sun gear; and second planetary gears fitted around second connecting members and meshed with the second sun gear.

대표청구항 ▼

A reduction apparatus comprises a case having case parts assembled to define a receiving space; a fixed ring gear coupled to the case parts; an output member having an output ring gear having a gear ratio and a module which are different from those of the fixed ring gear and an output shaft projecti

A reduction apparatus comprises a case having case parts assembled to define a receiving space; a fixed ring gear coupled to the case parts; an output member having an output ring gear having a gear ratio and a module which are different from those of the fixed ring gear and an output shaft projecting out of the case; a carrier having a first carrier member which has a guide projection and an input shaft-guiding groove and a second carrier member which defines together with the first carrier member an accommodating space; an input shaft having a shaft portion, a first sun gear and a second sun gear which are located between the first and second carrier members; first planetary gears fitted around first connecting members and meshed with the first sun gear; and second planetary gears fitted around second connecting members and meshed with the second sun gear. of said solenoids being normally open during a discontinuance of electrical control signals; a first trim valve selectively connectable with said main source and being operable in response to one of said two normally open solenoid valves to output an engagement control pressure; a second trim valve selectively connectable with said main source operable in response to another of said two normally open solenoid valves to output an engagement control pressure; a multiplex valve disposed in fluid communication with said main source and being connected to receive selective hydraulic fluid communication from said second trim valve; a default valve disposed in downstream flow relation with said multiplex valve and being connected to receive selective hydraulic fluid distribution from said multiplex valve; a manual valve having selective forward, neutral and reverse positions and being disposed in hydraulic fluid flow relation between said hydraulic source and said multiplex valve to selectively distribute hydraulic fluid to said first trim valve, said default valve, and said multiplex valve when said reverse position is selected, and to selectively distribute hydraulic fluid to said multiplex valve when said forward position is selected; and said first trim valve distributing hydraulic fluid to a first of the torque transmitting devices when said electrical source is inoperable and the manual valve is in the forward or reverse position, said second trim valve distributing hydraulic fluid to said multiplex valve for distribution to a second of said torque transmitting devices when said electrical source is inoperable and said manual valve is in said reverse position, and said second trim valve, said multiplex valve, and said default valve cooperating to distribute hydraulic fluid from said manual valve to a third of said torque transmitting devices when said electrical source is inoperative, said manual valve is in said forward position, said main source is supplying hydraulic fluid, and said transmission is operating in one of said four higher forward speed ratios prior to said electrical source becoming inoperable. 3. The electro-hydraulic control mechanism defined in claim 2 further comprising: said manual valve, said multiplex valve, said default valve, and said second trim valve cooperating to direct hydraulic fluid from said main source to a fourth of said torque transmitting devices when said transmission is operating in one of said lower forward speed ratios, said main source is supplying hydraulic fluid, said electrical source becomes inoperable, and said manual valve is in said forward position. 4. An electro-hydraulic control mechanism for a power transmission having a plurality of torque transmitting devices selectively engageable by said control mechanism to provide six forward speed ratios including two lower speed ratios and four higher speed ratios, a neutral condition, and a reverse speed ratio, said electro-hydraulic control mechanism comprising: a main source of hydraulic fluid pressure; an electrical source of electrical control signals; a plurality of solenoid valves that are selectively operable in response to signals from said electrical source, at least two of said solenoids being normally open during a discontinuance of electrical control signals; a first trim valve selectively connectable with said main source and being operable in response to one of said two normally open solenoid valves to output an engagement control pressure; a second trim valve selectively connectable with said main source operable in response to another of said two normally open solenoid valves to output an engagement control pressure; a multiplex valve disposed in fluid communication with said main source and being connected to receive selective hydraulic fluid communication from said second trim valve, said multiplex valve having a spring set position and a pressure set position; a default valve disposed in down