31results about How to "Fast gear shift" patented technology

The invention relates to an automatic manual speed changer and a speed change control mechanism thereof. The speed change control mechanism of the automatic manual speed changer comprises N gear shift fork components, a rotation drum which can rotate around the longitudinal axis and is provided with an endless annular groove around the peripheral face of the rotation drum, and gear shift deflector rods with first ends and second ends, wherein the number N of the gear shift fork components is larger than or equal to 2, the groove comprises N segments constant in height, which are different in constant radial height, and segments gradually varied in height, which are spliced with the adjacent segments constant in height, at least a part of the segments constant in height are in S shape and all the segments gradually varied in height are in collinear straight line shape and vertical to the longitudinal axis of the rotation drum when looked at from an expanded view of the peripheral face of the rotation drum, the first ends of the gear shift deflector rods are sequentially connected with the N segments constant in height in sliding mode, the gear shift deflector rods pivot so as to connect the second ends of the gear shift deflector rods with the N gear shift fork components in sequence, the first ends of the gear shift deflector rods are joined with the S-shaped portions of all the segments constant in height so as to enable the gear shift deflector rods to swing back and forth and enable the second ends of the gear shift deflector rods to drive the conterminal gear shift fork components to move back and forth once, and accordingly the automatic manual speed changer is enabled to sequentially achieve at most 2N gears for transmitting machinery force.

The invention relates to a shift control mechanism of a transmission. The shift control mechanism comprises a first shift lever, a second shift lever, a third shift lever and a fourth shift lever, wherein a first shift fork and a first shift drive fork are matched on the upper portion of the first shift lever, a second shift fork and a second shift drive fork are matched on the lower portion of the second shift lever, the lower portions of the third shift lever and the fourth shift lever are matched with a third shift drive fork respectively, and a third shift fork is matched on the upper portion of the fourth shift lever. The shift control mechanism is characterized in that a shift block is composed of a shift finger and a shift cam, a mounting hole is arranged at the center of the shift cam, a shift shaft is perpendicular to the fourth shift lever and matched with the mounting hole on the shift cam, and the shift finger is positioned between inner sides of the first shift fork, the second shift fork and the third shift fork. The shift control mechanism is simple in structure, and capable of achieving shift interlocking and gear selection before dislocating, reducing shift time, and improving safety and service efficiency of the transmission.

The invention discloses a gearbox. The gearbox comprises a gearbox casing, a power input shaft, an intermediate shaft and a power output shaft are arranged in the gearbox casing in a penetrated way, and each gear on the intermediate shaft is engaged with a gear on the power input shaft or gears on the power output shaft; the intermediate shaft is provided with first and second solenoids, a synchronizer is arranged between the first solenoid and the small gear of the intermediate shaft, and another synchronizer is arranged between the second solenoid and the large gear of the intermediate shaft; the gearbox casing, the power input and output shafts, the intermediate shaft and all the gears are made of non ferromagnetic materials, the synchronizers are made of permanent magnets, and the first and second solenoids control the synchronizers to move on the intermediate shaft; and a switching circuit which controls the current magnitudes and directions of the first and second solenoids is arranged outside the gearbox casing. The gearbox casing solves the problems that a present gearbox is complex in mechanical structure, large in friction force, easy to damage and not durable, and the service life of different components can be prolonged.

The invention discloses a three-wheeled automobile circulating type gear shifting conjoined rear axle which comprises a gearbox body. A power input shaft, a first power transmission shaft, a second power transmission shaft and a third power transmission shaft are installed in the gearbox body; a gear shifter is installed on the power input shaft and the first power transmission shaft in a slidingmode; a shifting fork shaft is installed in the gearbox body; a shifting fork for pushing the gear shifter to slide is installed on the shifting fork shaft in an axial sliding mode; and a circulatingtype speed changing control mechanism for driving the shifting fork is further installed in the gearbox body. Gear-up or gear-down can be completed only by pushing and pulling a gear lever forwards and backwards: the gear lever is pulled forward to add one gear and pushed backward to subtract one gear, and the gear-up and gear-down gear-shifting mechanism is similar to a manual-automatic integrated manual part. By means of the design, the gear shifting speed is increased, the possibility of wrong gear shifting is greatly reduced, and revolutionary upgrading of a three-wheeled automobile control mode is achieved. The rear axle further has the advantages of compact structure, reasonable design, convenience in user operation, effective reduction of gear shifting errors and the like.

The invention provides a lever-controlled clutch and a speed change device. The clutch is arranged on a shaft body; the clutch comprises a gear, a clutch shell, a spline body, a friction plate pressure plate, a pressure plate bearing and a pressure plate which sequentially sleeve the shaft body; the gear is fixed with the clutch shell; the spline body is fixed with the shaft body; a first frictionplate and a second friction plate sleeve the spline body; the outer circumference of the first friction plate is clamped with the clutch shell; the inner circumference of the second friction plate isclamped with the spline body; a return spring is arranged in the axial direction of the spline body; the return spring is used for returning of the friction plate pressure plate; one side of the pressure plate is provided with a lever mechanism; the lever mechanism comprises a clutch push rod and a support column; the clutch push rod is in pivot joint with the support column; and one end of the clutch push rod is pressed against the pressure plate. The clutch provided by the invention can realize large-torque transmission between the shaft body and the gear, and transmission efficiency is improved at the same time.

The invention provides a rear axle assembly of an electric automobile, and belongs to the technical field of electric automobiles. The assembly solves the problems that the rear axle of the existing electric automobile has high energy consumption and cannot automatically shift gears. The rear axle of the electric automobile comprises a speed reducer, a differential and two bridge tubes connected to the differential, wherein half shafts are arranged in the bridge tubes in a penetrating manner; brake drum discs driven to rotate by the half shafts are arranged at the outer end parts of the bridgetubes; the speed reducer consists of an input gear assembly, a shift gear assembly and an output gear assembly; a main motor capable of driving the input gear assembly to work is connected to an outer shell of the speed reducer; a shift motor capable of driving the shift gear assembly to shift gears is arranged on the outer shell of the speed reducer; a speed sensor capable of monitoring the output gear assembly is arranged on the outer shell of the speed reducer; a signal monitored by the speed sensor is transmitted to a traveling computer; and the traveling computer analyzes the signal andsends a shift instruction to the shift motor. The assembly has the advantages of high automation degree, low energy consumption and accurate gear shifting.

The invention provides a double-clutch transmission hydraulic gear shifting system which comprises an oil supply device, a first oil way, a second oil way and a controller. The first oil way and the second oil way are connected to the oil outlet end of the oil supply device in parallel. Each of the first oil way and the second oil way comprises an energy accumulator and a hydraulic cylinder which are connected with the oil outlet end of the oil supply device, and further comprises a first detector connected with the energy accumulator, the first detector is in communication connection with the controller, and the oil outlet end of the hydraulic cylinder is connected with the oil inlet end of the oil supply device. According to the hydraulic gear shifting system of the double-clutch transmission, energy consumption generated in the gear maintaining and gear shifting process of an oil supply device of the double-clutch transmission is reduced.

One or more loadable PN generators are controlled by a DSP or microprocessor in conjunction with a free-running counter that holds a reference bias count. The PN generator will usually be part of the referent or searcher. Each PN generator includes a loadable linear feedback shift register (LFSR) or its equivalent, a loadable counter that holds the index of that particular PN generator state, and is capable of receiving a shift command and controlling the LFSR and index counter to A shift control device that implements a lead or lag of some offset distance. The increase in speed is realized by DSP control. A data table of LFSR states and corresponding exponent numbers is stored in memory. These LFSR states subdivide the entire possible number of feasible states. It is advantageous to evenly space the states stored around the PN cycle. Processed in 2 steps by DSP to support fast shifting. The PN generator is first loaded to "transition" to the closest state using the data table, then the PN generator's shift control is used to shift the rest of the way.

The invention provides an AMT gearbox gear shifting control system and a control method. The system comprises an electromagnetic brake, and an engine, a clutch assembly, an engine output shaft, an auxiliary gearbox and an AMT gearbox which are connected in sequence; the auxiliary gearbox comprises a one-way clutch and a gearbox input shaft; and the engine output shaft is connected with a gearbox input shaft in a co-rotating mode or connected with the gearbox input shaft through the one-way clutch. When an AMT gearbox needs to be upshifted or forcibly downshifted, the engine output shaft is connected with the gearbox input shaft through the one-way clutch, then gear shifting operation is conducted, in the gear shifting operation process, a clutch of the clutch assembly is kept in a closed state, and in the upshifting gear shifting process, the rotating speed of an engine crankshaft is adjusted in an auxiliary mode through the electromagnetic brake. According to the AMT gearbox gear shifting control system provided by the invention, the frustration caused by power interruption during gear shifting of a traditional AMT gearbox is eliminated, the gear shifting power interruption time of the AMT gearbox is greatly shortened, the gear shifting speed is increased, and the driving comfort is improved.

The invention relates to a one-control-two-gear transmission gear shifting fluid control device and a working method thereof.The one-control-two-gear transmission gear shifting fluid control device comprises a shell, a driver, a planet row, a fluid control device and a clutch assembly, the fluid control device is arranged outside the shell and communicated with the driver in the shell, the driver comprises a piston, and the pushing end of the piston is connected with the clutch assembly; according to the gear shifting fluid control device of the one-control-two-gear transmission, complex TCU, sensors and proportional valves do not need to be matched, the influence of the response time of an air path control element is avoided, and the gear shifting speed is high.

The invention discloses a ladder-like n-gear wet clutch structure. The ladder-like n-gear wet clutch structure is characterized in that the ladder-like n-gear wet clutch structure comprises a shell, an oil conveying pipe, a piston, a sealing ring, a stop washer, a reset spring, a clutch disc, gear shafts, gear tooth rings and a gear transmission structure; and movement of the piston is hydraulically controlled, the reset speed of the piston is increased through the reset spring, the sealing ring prevents leakage of hydraulic oil, the position of the clutch disc is fixed through the stop washer, the gear shafts are all hollow shafts and are nested layer by layer, and the gear shafts are fixedly connected with the gear tooth rings. The ladder-like n-gear wet clutch structure is large in structural-load-carrying capacity, good in heat-dissipating property and wide in application range; by adopting the ladder-like shell for shape design, the adopted space is saved, and the structure is compact; and by adopting a modular thought, sustainable extension is achieved, and application prospects are wide.