8results about How to "Improve shift performance" patented technology

A single-power-source multi-gear disordered gear shifting control mechanism and a gearbox gear shifting device comprise a power source and a lead screw which are coaxially connected, the lead screw is sequentially and coaxially sleeved with three lead screw nuts, the peripheries of the lead screw nuts are provided with a plurality of circumferential limiting grooves parallel to the axes of the lead screw nuts, the lead screw nuts are further coaxially provided with protruding rings, and the outer diameter of each protruding ring is larger than that of the corresponding lead screw nut. The convex rings and the guide blocks are sequentially and axially connected in a limiting manner; and the three limiting control units sequentially correspond to the three lead screw nuts, each limiting control unit comprises a circumferential limiting convex part matched with the circumferential limiting groove structure, and the circumferential limiting convex part is in movable limiting contact with any circumferential limiting groove. Through reasonable arrangement of component structures and adoption of the technical scheme of independent control and disordered gear shifting of all gears, the jump gear function can be achieved, the gear shifting performance is better, the advantages in the aspects of cost, performance, transmission performance, service life and the like are remarkable, and the fault risk is lower; the structure is excellent, advantages are obvious, practicability is high, and application prospects are wide.

The invention relates to a gear shifting control method and device, a gear shifting controller and a vehicle. The method comprises the steps that when a gear shifting actuator is controlled to execute a gear advancing action, first motion information of the gear shifting actuator is obtained; under the condition that the first motion information of the gear shifting actuator meets a first preset low-speed operation condition, a matching result of current position information of a synchronizer and a target synchronous stroke is obtained; the target synchronous stroke is used for representing a synchronous sliding stroke between a synchronous initial position and a synchronous complete position of the synchronizer and a forward gear; and according to the matching result, determining an identification result of the synchronizer gear advancing and tooth jacking condition, wherein the identification result is used for indicating a gear shifting control process. By adopting the method, the gear shifting performance can be improved.

The application provides a gearbox manual gear shifting stroke measuring mechanism, which is accurate, easy to operate, applicable to any gearbox of the same gear shifting mechanism, portable, practical and high in utilization rate. The mechanism comprises a main base, a gear shaft, a meshing rack, a horizontal digital display module and a rotating connecting rod. The main base is provided with a gear shaft positioning cavity, a rack guiding cavity and a horizontal digital display module supporting block. The shaft body is vertically installed in the gear shaft positioning cavity through bearings at upper and lower positions. The upper end of the shaft body protrudes from the main base and is fixed with the rotating connecting rod. The lower end of the shaft body protrudes from the main base and is provided with the second gear, which is used for meshing with the gear shifting teeth of the gearbox.

The utility model provides a speed reduction gear shifting mechanism. The speed reduction gear shifting mechanism comprises a box body, a driving motor, a shifting fork and a speed reduction transmission mechanism, a mounting groove is formed in the box body; the driving motor is arranged on the side surface of the box body; the shifting fork is rotationally arranged in the mounting groove, a shifting head is arranged at one end of the shifting fork, a transmission part is arranged at the other end of the shifting fork, and a plurality of transmission teeth are arranged on the transmission part; the speed reduction transmission mechanism comprises a self-locking worm and a speed reduction gear, a plurality of first tooth parts and a plurality of second tooth parts are arranged on the speed reduction gear, the number of the first tooth parts is larger than that of the second tooth parts, the first tooth parts are meshed with the self-locking worm, and the second tooth parts are meshed with the transmission teeth. Compared with the prior art, the speed reduction gear shifting mechanism has the advantages that the motor can more accurately control the accurate rotation angle of the shifting fork through the speed reduction transmission mechanism, the gear shifting accuracy is improved, the structure is simple, and the gear shifting effect is good.

A limit device for a manual transmission shift fork comprises a housing, a fork shaft, and a fork. The fork shaft is supported by the housing, a connecting block is provided on the fork, a through hole is provided at the tail of the fork to form a sliding fit with the fork shaft, an axial strip-shaped limit groove is also provided at the tail of the fork, and the length of the strip-shaped limit groove is the shifting stroke distance. A limit pin is provided on the housing, and one end of the limit pin is inserted into the strip-shaped limit groove to form a sliding fit therewith, thereby limiting the movement of the shift fork. A limit boss is provided at the tail of the fork, and the strip-shaped limit groove is arranged on the limit boss. The limit pin is a stepped shaft, the small diameter section is a bare rod section inserted into the strip-shaped limit groove, the middle diameter section is a threaded section to fit with the threaded hole on the housing, and the large diameter section is a nut for fixing the limit pin. The limit pin is made of steel, and the fork is made of aluminum alloy. The present invention avoids cumulative tolerance, has a better shifting effect, and does not affect the NVH performance of the transmission.

The utility model provides a universal automobile gear shifting structure, which relates to the technical field of automobile gear shifting and comprises a shell, a base, a ball cup, a gear shifting rod sleeve and a gear shifting rod. The shell is detachably connected to the base through a plurality of locking screw assemblies. The ball cup is fixed to the top of the shell, and a vertically-through spherical hole is formed in the ball cup. A vertically-penetrating through hole is formed in the gear shifting rod sleeve. The gear shifting rod is connected into the through hole in the gear shifting rod sleeve in a lifting mode through an elastic reset assembly. A universal ball body is arranged on the peripheral wall of the middle part of the gear shifting rod sleeve; and the universal ball body is movably connected in the spherical hole. The utility model has the advantages that the base and the shell are convenient to disassemble and assemble, and meanwhile, different types of shells can be adapted, so that the generality and the suitability of the whole structure are further improved.

The invention relates to the technical field of vehicle control, in particular to a hybrid DCT clutch control system and method. Comprising the steps that multiple temperature grades are preset, working parameters of the current environment are obtained, and the working parameters comprise the engine torque, the clutch torque, the engine rotating speed, the clutch rotating speed and the current actual cooling flow; calculating the current temperature of the clutch according to the working parameters; the corresponding temperature grade is judged according to the current temperature of the clutch, and the corresponding control strategy is switched based on the temperature grade; and executing the control strategy by using an execution module. According to the hybrid DCT clutch control system, on the premise that the maximum cooling capacity is not improved and the maximum torque is not limited, it is guaranteed that the clutch is not overheated through a gear shifting strategy method, and meanwhile the excellent gear shifting performance and power output are kept.