Device for switching between normal and reverse drive force

A device for switching between normal and reverse drive force, comprising an input gear (11), an output gear (12) and a switch mechanism (13) that selectively switches drive torque applied to said input gear (11) and transmitted to said output gear (12),

• wherein said switch mechanism (13) comprises a planetary gear mechanism (14), a control mechanism (15) and a clutch mechanism (16),
• wherein said planetary gear mechanism (14) comprises a rotation transmission shaft (18) supported by a fixed shaft (17), a sun gear (19) coaxially integrated with said rotation transmission shaft (18), an internal gear (21) coaxially provided around said sun gear (19) and integrated with said output gear (12), planetary gears (22) provided between said sun gear (19) and said internal gear (21), and a carrier (23) for said planetary gears (22) provided coaxially with said rotation transmission shaft (18),
• wherein said control mechanism (15) comprises a control gear (25) provided rotatably and coaxially on said fixed shaft (17) and capable of being selectively locked and unlocked by an external actuator (24), said control gear (25) being integrated with said carrier (23),
• wherein said clutch mechanism (16) comprises a unidirectional roller clutch (26) provided between radially opposed surfaces of a boss (23c) of said carrier (23) and a clutch-mounting portion (34) provided in said internal gear (21), wherein lock release pins (28) formed on said control gear (25) are provided at ends to which wedge angle (θ) narrows in said roller clutch (26), leaving predetermined clearances to adjacent rollers (27), and
• wherein said output gear (12) is integrated with said rotation transmission shaft (18).

A device for switching between normal and reverse drive force, comprising an input gear (11), an output gear (12) and a switch mechanism (13) that selectively switches drive torque applied to said input gear (11) and transmitted to said output gear (12),

• wherein said switch mechanism (13) comprises a planetary gear mechanism (14), a control mechanism (15) and a clutch mechanism (16),
• wherein said planetary gear mechanism (14) comprises a rotation transmission shaft (18) supported by a fixed shaft (17), a sun gear (19) rotatably fitted on said rotation transmission shaft (18), an internal gear (21) coaxially provided around said sun gear (19) and integrated with said output gear (12), planetary gears (22) provided between said sun gear (19) and said internal gear (21), and a carrier (23) for said planetary gears (22) provided coaxially with said rotation transmission shaft (18),
• wherein said control mechanism (15) comprises a control gear (25) provided rotatably and coaxially on said fixed shaft (17) and capable of being selectively locked and unlocked by an external actuator (24), said control gear (25) being integrated with said carrier (23),
• wherein said clutch mechanism (16) comprises a unidirectional roller clutch (26) provided between radially opposed surfaces of said fixed shaft (17) and a clutch-mounting portion (34) provided in said output gear (12), wherein lock release pins (28) formed on said sun gear (19) are provided at ends to which wedge angle (θ) narrows in said roller clutch (26), leaving predetermined clearances (a) to adjacent rollers (27), said lock release pins (28) being inserted in engaging grooves (54) leaving predetermined control clearances (b) (b>a) in a rotation direction, and
• wherein said output gear (12) is rotatably fitted on said rotation transmission shaft (18).

A device for switching between normal and reverse drive force, comprising an input gear (11), an output gear (12) and a switch mechanism (13) that selectively switches drive torque applied to said input gear (11) and transmitted to said output gear (12),

• wherein said switch mechanism (13) comprises a planetary gear mechanism (14), a control mechanism (15) and a clutch mechanism (16), that said planetary gear mechanism (14) comprises a rotation transmission shaft (18) supported by a fixed shaft (17), a sun gear (19) coaxially integrated with said rotation transmission shaft (18), an internal gear (21) coaxially provided around said sun gear (19) and integrated with said input gear (11), planetary gears (22) provided between said sun gear (19) and said internal gear (21), and a carrier (23) for said planetary gears (22) provided coaxially with said rotation transmission shaft (18),
• wherein said control mechanism (15) comprises a control gear (25) provided rotatably and coaxially on said fixed shaft (17) and capable of being selectively locked and unlocked by an external actuator (24), said control gear (25) being integrated with said carrier (23),
• wherein said clutch mechanism (16) comprises a unidirectional roller clutch (26) provided between radially opposed surfaces of said fixed shaft (17) and a clutch-mounting portion (34) provided in said control gear (25), wherein lock release pins (28) formed on said sun gear (19) are provided at ends to which wedge angle (θ) narrows in said roller clutch (26), leaving predetermined clearances (a) to adjacent rollers (27), said lock release pins (28) being inserted in engaging holes (54′) leaving predetermined control clearances (b) (b>a) in a rotation direction, and
• wherein said output gear (12) is rotatably fitted on said fixed shaft (17).

A device for switching between normal and reverse drive force, comprising an input gear (11), an output gear (12) and a switch mechanism (13) that selectively switches drive torque applied to said input gear (11) and transmitted to said output gear (12),

• wherein said switch mechanism (13) comprises a planetary gear mechanism (14), a control mechanism (15) and a clutch mechanism (16), that said planetary gear mechanism (14) comprises a rotation transmission shaft (18) rotatably fitted on a fixed shaft (17), a sun gear (19) coaxially integrated with said rotation transmission shaft (18), an internal gear (21) coaxially provided around said sun gear (19) and integrated with said input gear (11), planetary gears (22) provided between said sun gear (19) and said internal gear (21), and a carrier (23) for said planetary gears (22) provided coaxially with said rotation transmission shaft (18),
• wherein said control mechanism (15) comprises a control gear (25) provided rotatably and coaxially on said fixed shaft (17) and capable of being selectively locked and unlocked by an external actuator (24),
• wherein said clutch mechanism (16) comprises a unidirectional roller clutch (26) provided between radially opposed surfaces of said fixed shaft (17) and a clutch-mounting portion (34) provided in said input gear (11), wherein lock release pins (28) formed on said control gear (25) are provided at ends to which wedge angle (θ) narrows in said roller clutch (26), leaving predetermined clearances (a) to adjacent rollers (27), and wherein with said roller clutch (26) locked, a shoulder portion (61) of each cam surface (46) on its expanded side faces the corresponding roller (26) with a control clearance (b) (b>a) left therebetween, and
• wherein an inner race (38) of said roller clutch (26) is integrated with said carrier (23).

A device for switching between normal and reverse drive force, comprising an input gear (11), an output gear (12) and a switch mechanism (13) that selectively switches drive torque applied to said input gear (11) and transmitted to said output gear (12),

• wherein said switch mechanism (13) comprises a planetary gear mechanism (14), a control mechanism (15) and a clutch mechanism (16),
• wherein said planetary gear mechanism (14) comprises a rotation transmission shaft (18) rotatably fitted on a fixed shaft (17), a sun gear (19) coaxially integrated with said rotation transmission shaft (18), an internal gear (21) coaxially provided around said sun gear (19) and integrated with said output gear (12), planetary gears (22) provided between said sun gear (19) and said internal gear (21), and a carrier (23) for said planetary gears (22) provided coaxially with said rotation transmission shaft (18),
• wherein said control mechanism (15) comprises a control gear (25) provided rotatably and coaxially on said fixed shaft (17) and capable of being selectively locked and unlocked by an external actuator (24),
• wherein said clutch mechanism (16) comprises a unidirectional roller clutch (26) provided between radially opposed surfaces of said fixed shaft (17) and a clutch-mounting portion (34) provided in said carrier (23), wherein lock release pins (28) formed on said control gear (25) are provided at ends to which wedge angle (θ) narrows in said roller clutch (26), leaving predetermined clearances (a) to adjacent rollers (27), and wherein with said roller clutch (26) locked, a shoulder portion (61) of each cam surface (46) on its expanded side faces the corresponding roller (26) with a control clearance (b) (b>a) left therebetween, and
• wherein an inner race (38) of said roller clutch (26) is integrated with said rotation transmission shaft (18).