8results about How to "Large shifting range" patented technology

The utility model discloses a multistage speed change structure for a threshing device of a multi-crop seed combine harvester, which comprises a stepless speed change mechanism and a stepped speed changing box which are connected with each other, and an output shaft of the stepped speed changing box is connected with an axial flow roller shaft. According to the speed change structure, the stepless speed change mechanism and the stepped gearbox are used together, the requirement for a larger speed change range of a threshing device of the seed combine harvester can be met, the speed change structure can be greatly suitable for harvesting of various crops of different types, and applicability is greatly improved.

A front wheel is connected with a rear wheel through a bicycle beam, a steering column connected with the bicycle beam is arranged below a handlebar, a steering arm is arranged at the tail end of the steering column, the bicycle beam is provided with a steering column connected with the rear wheel, and the steering arm is connected with the steering column above the rear wheel through a steering push-pull cable; a first shock absorber connected with a rear wheel is arranged below the steering column; the saddle is arranged in the middle of the beam; a plurality of circles of end face gears with different diameters are arranged on the front wheel, a cylindrical gear meshed with the end face gears is arranged on the bicycle beam, and the cylindrical gear is connected with the handlebar through a variable-speed push-pull cable. A simple end face gear speed change mechanism is adopted, and the transmission efficiency is high; due to rear steering and front driving, steering is flexible, and the turning radius is small; the saddle is low in gravity center, small in wind resistance, anti-falling and safe; the speed change range is wide and can be fast or slow; chain deviation resistance caused by different surfaces of the chain disc is avoided; a large-modulus gear is adopted, so that the strength is high and durability is realized; the failure rate is low and maintenance is easy.

The present invention discloses a two-speed rear axle power system for a pure electric vehicle, comprising a motor, a motor shaft, a clutch, a one-way clutch, an inner shaft, an outer shaft, a planetary row, a rear sun gear, a rear planetary wheel and an output shaft; the planetary row comprises: a ring gear, a front planetary wheel, a front sun gear, a planetary shaft and a planetary carrier. By controlling the outer race and the inner race of the one-way clutch to engage and disengage, a two-speed power switching is formed. The first-speed power path is provided by a drive motor 1, and passes through the motor shaft, clutch, outer shaft, front sun gear, front planetary wheel, planetary shaft and planetary carrier in sequence, and is output from the output shaft; the second-speed power will add a path provided by the drive motor at the same time, and passes through the motor shaft, clutch, inner shaft, rear sun gear, rear planetary wheel, planetary shaft and planetary carrier in sequence, and is output from the output shaft. This system simplifies the clutch structure, is simple to control, reduces costs, and realizes the two-speed rear axle power function of the electric vehicle at the same time.

The utility model relates to the technical field of oblique bevel gear torque dividing, and particularly discloses an oblique bevel gear torque dividing device which comprises a box body, one end of the box body is rotationally provided with a front input shaft, the front input shaft is connected with a front output shaft and a rear output shaft through a differential transmission mechanism, and the differential transmission mechanism is connected with an oblique bevel gear. The oblique bevel gear is meshed with a front output shaft oblique bevel gear; the front output shaft oblique bevel gear is arranged on the front output shaft; and the rear output shaft and the front input shaft are coaxially arranged. By arranging an oblique bevel gear and a front output shaft oblique bevel gear, a certain included angle is formed between the rotating axis of the front output shaft and the rotating axis of the input shaft, the shaft distance between the two shafts in the vertical direction is shortened, the ground clearance of the oblique bevel gear torque dividing device is large, and the reliability of the oblique bevel gear torque dividing device is effectively improved; the utility model further discloses a hinged dumper comprising the oblique bevel gear torque dividing device.

The invention belongs to the technical field of vehicle driving, and particularly discloses a 48F + 48R transmission mechanism. The reversing assembly is used for adjusting the advancing direction, the main speed change component is used for graded transmission, the auxiliary speed change assembly is used for adjusting the rotating speed, the common gear assembly is suitable for common conditions, the crawling gear assembly is used for crawling working conditions, and the central transmission assembly is used for transmission to a drive axle. The reversing assembly comprises an input shaft, a shuttle-type gear reversing idle wheel, a shuttle-type gear reversing driving gear and a shuttle-type gear reversing driven gear. The shuttle-type gear reversing driving gear is arranged on the input shaft; the main speed change part comprises a first-stage shaft and a second-stage shaft, and the central transmission assembly is in transmission connection with the second-stage shaft through a bevel gear set; the first-stage shaft and the second-stage shaft are provided with gears, synchronizers and mechanical shifting fork gear sleeves to achieve multi-stage speed change, 48 forward gears and 48 reverse gears are achieved, the flexibility and adaptability of a transmission system are improved, the driving requirements under various complex working conditions are met, and the running efficiency of a vehicle is improved.

The utility model relates to the technical field of core drilling, especially to a gearbox for core drilling machine. The gearbox comprises a box body, an input shaft, an intermediate rotating shaft, an output shaft and a shift fork mechanism. The input shaft is provided with a driving gear. The intermediate rotating shaft is provided with a driven gear, a clutch gear and an inner-outer connecting gear in sequence from top to bottom. The driving gear and the driven gear are in mesh with each other. The clutch gear rotates with the intermediate rotating shaft and moves up and down along the axial direction of the intermediate rotating shaft. The inner surface of the inner-outer connecting gear towards the clutch gear end is provided with internal teeth, and the outer surface of the inner-outer connecting gear away from the clutch gear end is provided with external teeth. The output shaft is provided with a second gear and a first gear in sequence from top to bottom along the axial direction. The shift fork mechanism drives the clutch gear to move up and down along the axial direction of the intermediate rotating shaft. The gearbox can switch the output shaft between low-speed rotation and high-speed rotation, so that the drill rod can meet various working requirements of low-speed heavy load and high-speed light load, and the working range of the drilling machine is improved.

The utility model relates to a cylindrical / cylindrical component welding tool which comprises a platform component composed of a support, moving wheels arranged on the lower portion of the support and an upper platform arranged on the upper portion of the support. A driving component is positioned and connected to the middle of an upper platform of the platform component, a supporting component is positioned and connected to the front part, and a control box is positioned and connected to the rear part; a to-be-welded workpiece (namely a cylindrical / cylindrical component) is arranged on the driving component and the supporting component, the control box is electrically connected with the driving component, and the to-be-welded workpiece is driven by the driving component to rotate. The welding efficiency can be improved, the welding quality of circumferential welds is guaranteed, operation is easy, convenient and rapid, and labor intensity is relieved.

The present invention relates to the technical field of motor vehicle shifting, and in particular to a planetary gearbox of three gears, which comprises a first brake shifting mechanism, a second brake shifting mechanism, a clutch shifting mechanism and a gear transmission mechanism; the first brake shifting mechanism and the second brake shifting mechanism share the same brake sleeve; the clutch shifting mechanism comprises a clutch and a clutch sleeve; the gear transmission mechanism comprises a gear ring and a sun gear seat; in the first brake shifting mechanism, the outer teeth of the brake sleeve are slidably connected with the inner teeth of the housing, and the inner teeth of the brake sleeve can be connected with the sun gear seat; in the second brake shifting mechanism, the outer teeth of the brake sleeve are slidably connected with the inner teeth of the housing, and the inner teeth of the brake sleeve can be connected with the gear ring, and the inner teeth of the clutch sleeve are slidably connected with the outer teeth of the oil cylinder and can be connected with the sun gear seat. The planetary gearbox of three gears has a wider speed range, and improves the performance of the whole vehicle by automatically switching the three speed ratios of the gearbox.