Back to results
US 11,674,576 B2Granted
Speed-changing device
AssigneeHitachi Construction Machinery Co., Ltd.
InventorTakuma Koinuma
Life of this patent
Estimating the term…
Abstract
A speed-changing device (21) is provided with an input shaft (22), an output shaft (23), a planetary gear mechanism (29), a first variator (33), a second variator (34), and a controller (25). The planetary gear mechanism (29) is configured to include a carrier (29A) connected to the input shaft (22), a first sun gear (29B) connected to the first variator (33), and a second sun gear (29C) connected to the output shaft (23). The second variator (34) transmits power transmitted from the first variator (33) to the output shaft (23), or transmits power transmitted from the output shaft (23) to the first variator (33). The controller (25) changes the rotation speed of the first variator (33), thereby changing the rotation speed of the output shaft (23) in relation to the rotation speed of the input shaft (22).
Claims9
A speed-changing device comprising:
- an input shaft linked to a power source;
- an output shaft linked to a load;
- a planetary mechanism disposed between the input shaft and the output shaft;
- a first variator connected to the planetary mechanism;
- a second variator disposed apart from the first variator;
- and
- a controller configured to change a rotation speed of the first variator, characterized in that:
- the planetary mechanism is configured to include three members of a carrier, a first sun member rotating about a rotation center axis of the carrier and a second sun member rotating about the rotation center axis of the carrier, wherein
- a first member that is one of the three members in the planetary mechanism is connected directly or via another member to the input shaft,
- a second member apart from the first member of the three members in the planetary mechanism is connected directly or via another member to the first variator,
- a third member apart from the first member and the second member of the three members in the planetary mechanism is connected directly or via another member to the output shaft, and
- a planet member and a balance member are supported on the carrier of the planetary mechanism, the planet member and the balance member performing power transmission while revolving about the rotation center axis of the carrier and rotating with the first sun member and the second sun member, wherein
- the planetary mechanism distributes torque transmitted to the planetary mechanism from the power source to the second member and the third member,
- the planetary mechanism performs a rotation motion with two degrees of freedom between the first member, the second member and the third member,
- the second variator transmits power transmitted from the first variator to the load or the power source, or transmits power transmitted from the load or the power source to the first variator, and
- the controller changes a rotation speed of the first variator to change a rotation speed of the output shaft in relation to a rotation speed of the input shaft.
13 more elements
A speed-changing device comprising:
- an input shaft linked to a power source;
- an output shaft linked to a load;
- a planetary mechanism disposed between the input shaft and the output shaft;
- a first variator connected to the planetary mechanism;
- a second variator disposed apart from the first variator;
- and
- a controller configured to change a rotation speed of the first variator, characterized in that:
- the planetary mechanism is configured to include three members of a carrier, a sun member rotating about a rotation center axis of the carrier and a ring member positioned closer to a radial outside than the sun member and rotating about the rotation center axis of the carrier, wherein
- a first member that is one of the three members in the planetary mechanism is connected directly or via another member to the input shaft,
- a second member apart from the first member of the three members in the planetary mechanism is connected directly or via another member to the first variator,
- a third member apart from the first member and the second member of the three members in the planetary mechanism is connected directly or via another member to the output shaft, and
- a planet member is supported on the carrier of the planetary mechanism, the planet member performing power transmission while revolving about the rotation center axis of the carrier and rotating with the sun member and the ring member, wherein
- the planetary mechanism distributes torque transmitted to the planetary mechanism from the power source to the second member and the third member,
- the planetary mechanism performs a rotation motion with two degrees of freedom between the first member, the second member and the third member,
- the second variator transmits power transmitted from the first variator to the load or the power source, or transmits power transmitted from the load or the power source to the first variator, and
- the controller changes a rotation speed of the first variator to change a rotation speed of the output shaft in relation to a rotation speed of the input shaft, further comprising:
- a first power transmission route as a power transmission route for transmitting the power from the power source through the planetary mechanism to the load,
- a second power transmission route that is disposed in parallel with the first power transmission route to transmit the power to the load by meshing of gears each other without via the planetary mechanism, and
- a first clutch disposed in the second power transmission route to switch the engagement and disengagement, wherein
- the controller engages the first clutch to perform power transmission through the second power transmission route.
17 more elements
Dependencies are inferred from the claim text.