64results about How to "Large gear ratio" patented technology

The invention relates to a tooth chain type stepless transmission for an automobile. A tooth chain is arranged around a plurality of planetary gears which can unidirectionally rotate; all the planetary gears can move in a corresponding radial chute on a drive wheel; and stepless transmission is realized by changing the revolution diameter of the planetary gears. An unlocking key is arranged in a one-way clutch of each planetary gear; and when the tooth chain and the planetary gears are meshed and separated, the unlocking key can be driven so that the clutch is maintained in a one-way locking state or unlocking state. The invention breaks through the traditional theory that the stepless transmission is only friction power transmission, solves the problem of carrying out stepless transmission by utilizing a gear, can effectively improve the transfer power of the stepless transmission and has the advantages of large force transmission, high rotating speed, stable running, reliable work, and the like.

The invention provides a power transmission apparatus for vehicle which can realize a high torque transmission efficiency and a high reduction gear ratio of a reduction gear unit with a more compact structure, and a vehicle-driving electric machinery system using the power transmission apparatus for vehicle. The power transmission apparatus for vehicle comprises a motor, a reduction gear unit for decelerating power outputted from the motor, and a differential gear unit for distributing the power decelerated by the reduction gear unit to left and right wheels. The reduction gear unit is a reduction gear mechanism including a plurality of gears mounted over a shaft which is rotatably held by a housing in a fixed position. The reduction gear unit and the differential gear unit are arranged within an area in oppositely facing relation to an axial end surface of the motor.

Wind turbine comprising a nacelle with a generator and wind turbine blades for driving the generator, a tower supporting the nacelle wherein the nacelle is rotatable about a vertical axis an azimuth drive for rotating the nacelle around the axis, said azimuth drive comprising a plurality of asynchronous yaw motors and an azimuth controller with a frequency unit for controlling the plurality of asynchronous yaw motors, wherein the azimuth controller is arranged to connect all of the plurality of asynchronous yaw motors to the one frequency unit in a rotating mode and to connect only a subset of the plurality of asynchronous yaw motors from the one frequency unit in a locking mode.

The invention provides a transmission providing a gear ratio between an input shaft and an output shaft. The transmission comprises an annulus ring, a sun wheel being rotatable around a central axis of the transmission, a planet carrier being rotatable around the central axis of the transmission, and a set of planet wheels, each wheel comprising a plurality of wheel segments with different diameters, the planet wheels being fixed in rotational bearings of the planet carrier and being arranged to rotate epicyclically around the central axis. The annulus ring and the sun wheel each interacts with one of the wheel segments e.g. via meshing toothed gear wheels. The gear facilitates various interaction means at different locations in the gear, and thus facilitates a potentially less noisy, lighter, smaller or stronger gear by use of a low amount of components.

A compact planetary gear reduction mechanism having a universal gear reduction ratio is provided, which comprises: an input shaft rotatable about a first rotational axis; at least one planetary gear having a first and a second gear of the same shape integrated together rotatably about a third rotational axis (O3) but in out of phase with each other; an eccentric rotary plate for transmitting the rotational motion of the input shaft to a shaft mechanism which in turn transmits the eccentric rotation of the eccentric rotary plate to the planetary gear; an external fixed sun gear meshed with the first gear of the planetary gear; and an external driven sun gear to be connected to the output shaft of the gear reducer, having a different number of gear teeth than the fixed situ gear and meshed with the second gear of the planetary gear.

A power transmission mechanism transferring a power output from an engine to a propeller includes a transmission planetary gear train that transforms the output power of the engine before it is transferred to the propeller. The transmission planetary gear train includes a transmission sun gear, a transmission double planetary gear set, and a transmission internal gear, in which the transmission sun gear is connected via the first clutch to the input end shaft extending into the engine, and the transmission sun gear is also connected via the second one-way clutch to the housing. In addition, the transmission double planetary gear set is connected via the second clutch to the input end shaft extending into the engine, and the transmission double planetary gear set is also connected via the first one-way clutch to the housing. Further, the transmission internal gear is connected to the output end shaft extending toward the propeller.

For raising an MG2 rotational speed MRN2 to a target rotational speed (low-gear rotational speed NLG), an output torque of an MG2 starts to increase at a time t4. During an inertia phase (period α), the output torque of the MG2 is limited not to exceed a first limit value TLIM1 determined according to a shift progress degree PRG and a second limit value TLIM2 determined according to a rotational speed margin NEmgn. Since the output torque of the MG2 is sufficiently small in a final stage of the inertia phase (period α), output variations occurring at a time t6 when torque down is performed on the MG2 can be small. The torque down of the MG1 and MG2 does not raise engine rotational speed NE.

The present invention relates to a structure constituent for a gearmotor series. The mentioned gearmotor includes gear transmission equipment drived by electromotor, this structural series includes at least structural quantity which characteristics can be described by at least one physical quantity, mechanical quantity and/or geometric quantity, especially the structural quantity is rating power, axis height or torque. The electromotor always includes at least a electromotor shell, a rotor containing rotor axis and a electromotor bearing cover on driving side, thus, the electromotor shell of the electromotor has a junction region with the electromotor bearing cover on the output side so as to have at least two various deformation of the output side electromotor bearing cover to connect with the electromotor shell.

A planetary gear mechanism of the invention includes a housing, an input shaft that has an eccentric portion whose center lies on an eccentric axis, and is rotatable about the axis of input and output shafts relative to the housing, an oscillating face plate that eccentrically oscillates relative to the input shaft via the eccentric portion, and rotates about the eccentric axis, and an output shaft that is provided with a second internally toothed gear that internally contacts and meshes with a second externally toothed gear formed on the oscillating face plate, and is rotatable about the axis of the input and output shafts relative to the housing. The housing is formed with a first internally toothed gear that internally contacts and meshes with a first externally toothed gear formed on the oscillating face plate. As the input shaft rotates, a circumferential position at which each externally toothed gear meshes with the corresponding internally toothed gear changes, and rotation of the input shaft is transmitted at a reduced speed to the oscillating face plate, of which rotation is delivered at a further reduced speed to the output shaft.

Planetary gearsets (PS1, PS2) are coupled and arranged coaxially and radially offset relative to one another. Gearset (PS1) is arranged radially inside gearset (PS2) and each have a carrier on which planet gears (8, 12) respectively rotate. A support ring, having inner and outer teeth, is radially arranged between the planet gears (8, 12). A sun gear, which meshes with planet gears (8) which mesh with the inner teeth of the support ring, is radially within gearset (PS1). A ring gear, which meshes with planet gears (12) which mesh with inner teeth of the support ring, is radially outside gearset (PS2). The sun gear of gearset (PS1) is fixed to an input shaft. The carrier of gearset (PS1) is fixed to the ring gear of gearset (PS2) and mounted, via a radial-axial bearing, on the output shaft. The carrier of gearset (PS2) is fixed to an output shaft.

The invention relates to a sleeve-gear transmission and folding bicycle. There is a group of sleeve gears matched with a group of fixed gears. A part is driven to move or rotate by rope or bar to extrude a sleeve gear matched with a fixed gear. When the part moves again matched sleeve gear retracts. Another sleeve gear extrudes and is matched with another fixed gear to change speed. Moving is carried out continuously reciprocating speed increasing and speed decreasing can be realized. Speed-variable process is lightness and smooth. The transmission is set on the oblique bar of bicycle and is connected with gear, ratchet wheel and two straight driving wheels. The diameter of wheel is small than 10cm and the speed exceeds in prior bicycle. A pin is drawn out the main cubage of folded bicycle is only 8X15X99 cm. The transmission also can be used in electrical bicycle, motorcycle and other mechanism.

The invention discloses a pure electric two-speed differential device power assembly for an electric vehicle. A motor drives a first differential device; a first differential device casing is providedwith an input gear; the input gear transmits an output gear in an engaged way; the output gear is arranged in a second differential device casing; the non-gear side of one differential device is coaxially provided with a braking shaft; a clutch is also installed and connected through a self casing; a clutch disc is arranged at the braking shaft in a sheathing way; the clutch disc can generate axial reciprocating motion along the braking shaft; the clutch disc and the clutch are in mutual and clutch transmission. On the basis of the clutch function of the clutch, a brake is matched and selected for closing and/or releasing the differential device; various driving modes such as high-speed gear, low-speed gear, parking or neutral gear are realized; the requirements of precise and compact transmission mechanism, great gear ratio, high efficiency, small vibration noise, no power intermittent gear shifting, small loss, ultralow cost and ultrahigh reliability are realized; the cost performance of a vehicle is shown; the pure electric two-speed differential device power assembly is applicable to various electric vehicles.

The invention provides a variable-speed traction drive transmission device compact and having high durability. The traction drive transmission device (10) varies, by the use of traction of rolling bodies (K) arranged between an input shaft (Si) and an output shaft (So), the speed of rotation of the input shaft (Si) into a desired transmission ratio to output the result by the output shaft (So). The traction drive transmission device (10) is placed inclined so that the rotation axes of the rolling bodies (K) are not orthogonal to the axes of the input shaft (Si) and the output shaft (So), and has a load regulation cam (50) and a transmission ratio variation mechanism of a differential type using a worm gear (55). The load regulation cam (50) automatically varies a preload applied to the rolling bodies (K) according to torque of the input shaft (Si). The transmission ratio variation mechanism is connected to a retainer (40) as the traction input-output member of the rolling bodies (K) and varies a transmission ratio by controlling the speed of rotation of the retainer (40).

A connector includes a second housing fittable with a first housing, a slide member movable relative to the first housing along a connector fitting direction, a transmission gear member rotatably supported by a support shaft provided on the first housing, a first rack gear portion provided on the slide member along the connector fitting direction, a driven gear portion of the transmission gear member rotated by movement of the first rack gear portion in the connector fitting direction, a main drive gear portion of the transmission gear member provided on a side opposite to the driven gear portion with the support shaft interposed therebetween, and a second rack gear portion provided on the second housing along the connector fitting direction, and movable relative to the first housing along the connector fitting direction by rotation of the main drive gear portion.

A group transmission of a motor vehicle having a main transmission and a downstream range group. The range group has two gear steps for different speed ranges and a reversing step for reverse driving. The range group has two planetary gearsets, each with a planet carrier, a sun and ring gears. To engage a driving range for lower speeds, the sun gear of the second gearset and the ring gear of the first gearset are locked to the housing by a first clutch. To engage a driving range for higher speeds, two respective elements of the two gearsets can be connected to one another, in a rotationally fixed manner, by a second clutch. To engage a reversing driving range, the planet carrier of the first gearset and the ring gear of the second gearset are locked relative to the housing by a third clutch.

A gear transmitting device has such a structure as including an input gear, an output gear, and one or more intermediate gears for transmitting gear oscillation to the input and output gears. The gear transmitting device is also provided with a gear train including the input gear for transmitting oscillation to the output gear. The gear train includes, for gear engagement, one or more pairs of arc-circular tooth gears, and an involute tooth gear or a cycloidal tooth gear. With such a structure, the gear transmitting device can be reduced in size, and accordingly an electronic apparatus incorporating the gear transmitting device can be also reduced in size.

The present invention relates to a double conical disk friction stepless speed changer. It is characterized by that its input shaft is mounted in the left end of external shell and its output shaft is mounted in the right end of said external shell; the eccentric sleeve is mounted in the inner hole of external shell, the medium friction drive disk and medium drive shaft are mounted in the inner hole of eccentric sleeve; the double-head bidirectional screw rod left end is mounted into the positive screw hole of medium friction drive disk by means of positive screw threads, and the double-head bidirectional screw rod right end is mounted into the negative screw hole of medium drive shaft by means of negative screw threads; the left end face of medium friction drive disk is conical recessed surface, the right end of input shaft is conical projected surface; the left end face of output shaft is conical recessed surface, the right end of medium drive shaft is conical projected surface; and the eccentric sleeve is driven by eccentric sleeve drive device and is rotated.

A force feedback handle device with a degree-of-freedom includes: a driving part (1), a link part (2) and a frame part (3); wherein the driving part (1) and the link part (2) are both installed on a top board (9), and a rotation axis of the link part (2) coincides with a rotation axis of the driving part (1); the driving part (1), the link part (2) and the frame part (3) are fixed and connected by bolts. A working method of the force feedback handle device includes four steps. The force feedback device of the invention has low inertia and high stiffness performance, which improves overall interaction performance of the force feedback device. The structure is simple and a manufacturing cost is low.