45results about How to "High gear ratio" patented technology

A drive system for rotating one or more wheels of an aircraft landing gear for the purposes of ground taxiing and/or spin-up prior to landing includes a motor operable to rotate a first drive pinion via a first drive path, and a driven gear adapted to be fixed to the wheel. The drive system has a first configuration in which the first drive pinion is capable of meshing with the driven gear to permit the motor to drive the driven gear via the first drive path. One of the first drive pinion and the driven gear includes a first sprocket and the other of the first drive pinion and the driven gear includes a series of rollers arranged in two or more rows, each row of rollers being arranged to form a ring, each roller being rotatable about a roller axis at a fixed distance from an axis of rotation of the first drive pinion or driven gear, respectively.

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.

Embodiments of the present invention relate to magnetic gears comprising a pair of rotors magnetically coupled in a geared manner via a magnetic space harmonic generated as a consequence of varying an air gap between sets of permanent magnets.

The invention relates to a four-stage driving combined type speed reducer and a speed reduction method thereof. The four-stage driving combined type speed reducer with small teeth difference is a bevel gear-planetary-parallel shaft-four-stage drive with small teeth difference and structurally comprises an input gear pair, a middle planetary gear pair, a parallel shaft gear pair, an output gear pair with small teeth difference, a box body and an end cover. The principle of the speed reduction method of the four-stage driving combined type speed reducer with small teeth difference is that the speed reduction of the speed reducer is realized through a first-stage driving bevel gear drive, a second-stage planetary gear drive, a third-stage driving parallel shaft drive and a fourth-stage driving drive with small teeth difference. The invention has the advantages that the transmission speed ratio and the output torque of the vertical speed reducer are greatly improved, and the bearing capacity and the overload capacity are strong; and the vibration noise is low, the heat dissipation is rapid, the gear machining precision is improved, the machining precision can be ensured easily, the volume and the weight of the entire speed reducer are reduced, the manufacturing cost of the large-power vertical speed reducer is greatly reduced and the production cycle is shortened.

In a gear shift control device for a vehicle that shifts a transmission having a plurality of gears based on a shift line set in a shift map, an upshift line for shifting to the highest gear, and a downshift line that is located in a high vehicle speed region on the side of a higher vehicle speed than the upshift line are set in the shift map. The downshift line is used when shifting from the highest gear to a prescribed gear that has a larger gear ratio than the highest gear.

The invention provides a high-speed wire stranding machine with excellent performance. The high-speed wire stranding machine with excellent performance comprises a case, a wire inlet mechanism, a wiretake-up mechanism and a wire arranging device, wherein the wire inlet mechanism comprises a wire inlet main shaft, a wire inlet die holder, a broken wire supporting rod and a meter counting wheel. Acontrol device is arranged outside the case, the wire take-up mechanism sequentially comprises a wire drawing wheel, a winch, a wire passing wheel, a traction wheel, a guide wheel and a wire take-up cradle stand, a drawing part is arranged below the traction wheel and comprises a speed reduction box, a main shaft synchronous wheel, a motor synchronous wheel, driven hanging teeth, active hanging teeth and a connecting shaft, and a lifting device is arranged below a take-up reel and comprises a lifting platform, a connecting rod mechanism and a pushing mechanism. The high-speed wire stranding machine with excellent performance can reduce noise, facilitate wire take-up, is stable in transmission, makes wire threading and winding smoother, ensures set constant tension, makes copper wires or core wires not damaged in the wire stranding process, and ensures that high-quality wires can be machined in the wire industry.

The invention relates to an embedded two-layer harmonic drive reducing gear, which comprises a wave generator. The output end of the wave generator is provided with an input shaft, and a cam is arranged outside the input shaft. The embedded two-layer harmonic drive reducing gear is characterized in that inner-layer flexible bearings are distributed outside the cam; and an inner-layer flexible wheel is sleeved outside the inner-layer flexible bearings. Furthermore, an inner-layer steel wheel is sleeved outside the inner-layer flexible wheel, and outer-layer flexible bearings are sleeved outside the inner-layer steel wheel. Meanwhile, an outer-layer flexible wheel is sleeved outside the outer-layer flexible bearings, and an outer-layer steel wheel is sleeved outside the outer-layer flexible wheel. Therefore, double-layer harmonic waves are realized, and can achieve a higher gear ratio than the conventional single-layer harmonic waves. Meanwhile, due to the elliptical fit design, the accuracy and the efficiency are higher than single harmonic waves. The huge torque output can be realized; and in addition, the embedded two-layer harmonic drive reducing gear is precise in structure, small in size and compact in structure, easily adopts to different installation places and deserves promotion and application.

An aircraft landing gear steering system comprising a turning member that is operably coupled to a landing gear leg through a harmonic drive mechanism. The landing gear steering system may be electrically driven. Additionally, the landing gear system has various advantages, including the provision of a safe failure mode should the harmonic drive mechanism fail.

The invention discloses a gear case for a high-power vertical roller mill, which is composed of a three-stage reduction transmission structure. The gear case for the high-power vertical roller mill is characterized in that a first stage transmission mechanism adopts a bevel gear or a belt pulley or a worm gear mechanism, and a second stage transmission mechanism and a third stage transmission mechanism adopt a planet gear mechanism. The three stages of transmission mechanisms are sequentially arranged from bottom to top inside a case body; an input shaft of the first stage transmission mechanism is used as an input end; an output shaft of the first stage transmission mechanism is in transmission connection with a sun wheel of the second stage transmission mechanism, and an inner gear of the second stage transmission mechanism is fixed. On one hand, the planet gear of the second stage transmission mechanism is in transmission connection with the sun wheel of the third stage transmission mechanism through an inner gear sleeve and a duplex outer gear sleeve, on the other hand, the planet gear of the second stage transmission mechanism is supported on a planet carrier of the third stage transmission mechanism through a hanger rod and a thrust bearing via floating suspension, and the planet carrier of the third stage transmission mechanism is fixedly connected with an output flange. The invention provides the gear case for the high-property vertical roller mill with high power, large transmission ratio and strong uniform loading capacity.

An actuator system and method (10) includes a blow out preventer (11), a hydraulic motor (12), a gear box (13) intermediate hydraulic motor (12) and blow out preventer (11), and a position indicator (14). Gear box (13) has an input (19), an output (20), and a gear set (23). Gear set (23) is biased by a spring (33) acting on a piston (31) to a default high range gear ratio when blow out preventer (11) is open, to provide maximum closure/lock speed. Gear set (23) is moved by a hydraulic command signal acting on piston (31) to a low range gear ratio when blow out preventer (11) is closed/locked, to provide maximum torque to move blow out preventer (11) toward its open position. Position indicator (14) shows the actual position of blow out preventer (11) independent of the number of turns of input (19) to move the blow out preventer.

The invention relates to an active electromechanical suspension system for a chassis of a motor vehicle, having a first and a second axis for two opposing wheels (9). Struts (17) having strut actuators (2) are assigned to the first axis for the opposing wheels, and strut arrangements (18) having rotation actuators (3) are assigned to the second axis for the opposing wheels.

The invention relates to an automobile generator which utilizes isolated coupling of a high-frequency transformer to realize brushless excitation, and represents a combination of the modern switch power technology and the motor technology. High-frequency current is coupled to a secondary coil rotating together with a rotor through a fixed primary coil, and the high-frequency current provides power for an exciting coil in the rotor after rectifying and wave-filtering. The simple and efficient excitation not only brings the advantage of a brushless generator to the invention, but also enables the invention to maintain the advantages of low speed, good charging performance and simple structure in a brush generator; in addition, the invention has more stable voltage output. By adopting the technology of the invention, a regular brush automobile generator can be improved into such a brushless generator through simple changes.

The invention discloses a robot joint speed reducer based on nutation speed reduction and friction transmission and a design method. The robot joint speed reducer comprises a shell jointly composed of a bearing base, an upper positioning ring and a lower positioning ring, a nutation wheel base installed on the lower positioning ring and a nutation wheel installed on the nutation wheel base. The robot joint speed reducer further comprises an output flange, a positioning needle and a small clamping plate. The output flange is installed on the upper positioning ring, and the positioning needle and the small clamping plate are installed on the bearing base. Under the limiting effect of the positioning needle and the driving of the rotary motion of the nutation wheel base, the nutation wheel generates nutation motion, the output flange is pushed to rotate under the effect of friction force, and decelerating motion is generated. The robot joint speed reducer based on nutation speed reduction and friction transmission and the design method have the advantages of reasonable torque load, large transmission speed ratio, high transmission precision, stable transmission, reverse self-locking, simple and compact structure and the like.

The invention provides a stable high-power plug-in centrally-mounted motor, which comprises a main shell, the main shell comprises a shaft sleeve inserted into a bicycle five-way assembly and an assembly shell fixed on the upper part of the shaft sleeve, and an electric module is assembled on the left side of the assembly shell; a penetrating through hole is machined in the middle of the assembling shell, an output shaft of the electric module extends out of the left side of the assembling shell to the right side of the assembling shell, a fixing frame is fixedly assembled on the right side of the assembling shell, two or more planet shafts evenly distributed relative to the circumferential direction of the output shaft are assembled between the assembling shell and the fixing frame, and planet wheels are assembled on the planet shafts. A sun gear in meshing transmission is assembled outside the planet gear, a transition module is in transmission connection with the sun gear, and the transition module is in transmission connection with the chain wheel. A planetary transmission structure is adopted in the motor, so that transmission is more stable, and the output power of the motor can be greatly improved under the same size.

The invention discloses a chainless hollow hub bicycle. The chainless hollow hub bicycle comprises a frame, a rear wheel mechanism and a driving mechanism, wherein the frame comprises a connecting unit; the rear wheel mechanism comprises a ring-shaped fixing rack and a wheel hub arranged outside and rotatably connected with the ring-shaped fixing rack; the connecting unit is fixedly connected withthe ring-shaped fixing rack, and one side of the wheel hub is fixedly connected with an outer gear ring; the driving mechanism comprises a central axle hinged to the frame, and both ends of the central axle are connected with pedal levers. According to the chainless hollow hub bicycle, the rear mechanism and the driving mechanism abandon a chain driving manner in the prior art, solve the problemof releasing and fall-off of chains, improve the safety coefficient, greatly prolong the service life of the bicycle and reduce the maintenance cost; an applied planetary speed changing mechanism is low in manual transmission loss and meanwhile small, exquisite and high in gear ratio.

The invention discloses a centrifugal clutch assembly integrated structure and an automatic speed change hub with a large gear ratio, and relates to the field of speed change devices. According to the technical scheme, the clutch is characterized by comprising a first clutch inner ring part, a first clutch driving piece and a first buffer frame; and a second clutch inner ring portion, a second clutch driving member and a second buffer rack. The first clutch inner ring part and the second clutch inner ring part are fixedly connected or integrally formed to form an integrated inner ring. According to the invention, the number of parts and assembly procedures can be reduced, the production cost and the detection cost can be reduced, the reliability and the stability can be improved, meanwhile, the structure can be simplified, the size can be optimized, automatic switching of three gears can be realized by utilizing the output speed, and the gear ratio can be improved, so that the riding experience can be further optimized.