A kind of gear
Technical field
The present invention relates to a kind of gear, relate in particular to a kind of gear of many grades of speed changes.
Background technique
Bicycle, automobile or other vehicles are the means of transportation in people's daily life, conventionally have at least one speed change gear, for the gearshift control of Vehicle Driving Cycle.
In known prior art, the power of motor car engine, through clutch, speed changer, transmission shaft, is finally sent to differential mechanism and distributes to semiaxis driving wheel in left and right again.
Traditional speed changer adopts gear train, and the number of teeth of the gear train of every grade is fixed, so the gear ratio of each grade is a definite value (namely so-called " level ").Belong to step change transmission.While adopting a speed changer to realize speed governing, because the number of teeth of every grade is fixed, if want to realize many grades of speed changes, needing to adjust increases gear train number, and structure is more complicated, inconvenience is installed, and user cost is higher, is also not easy to maintenance.
In addition, general speed variator system does not exist reverse gear to carry out the oppositely function of output, has the narrow limitation of the way of output.
Therefore, one can realize multiple gear speed-changings, simple in structure, easy for installation, and the speed change gear that user cost is lower urgently occurs.
Summary of the invention
The object of the invention is to overcome the defect that prior art exists, a kind of gear of many grades of speed changes is provided.
The technological scheme that realizes the object of the invention is: a kind of gear, comprise input device, output unit, shell and be installed on the planetary gears in described shell, described planetary gears comprises planet carrier and planetary pinion, described planet carrier is fixedly installed on described enclosure, on described planet carrier, be provided with described planetary pinion, described input device is connected with described output unit by planetary gears.
Preferably, described shell one side inside is fixedly installed shell ring gear, and described shell is hollow circular cylinder shape.
Described shell ring gear and described shell are one-body molded.
Preferably, described planetary pinion comprises the primary planet pinion and the secondary planetary gear that are arranged at respectively described planet carrier two ends, is provided with planet carrier ring gear in the middle of described planet carrier.
Preferably, described primary planet pinion is fixedly installed on described planet carrier one end by gear shaft, described primary planet pinion and described shell ring gear are connected with a joggle, and described secondary planetary gear is arranged on described shell by gear shaft, and are connected with a joggle with the ring gear of the planet carrier the other end
Preferably, described input device comprises input shaft, and described input shaft and described primary planet pinion are connected with a joggle.
Preferably, described input shaft is provided with input shaft external gear and input shaft internal spline, and described input shaft external gear and described primary planet pinion match.
Preferably, also comprise counter gear, the external gear of described counter gear and described secondary planetary gear are connected with a joggle.
Preferably, described output unit comprises output shaft, and described output shaft is provided with output shaft external splines, and the internal spline of described output shaft external splines and described counter gear, planet carrier internal spline, input shaft internal spline match.
The present invention has positive effect: (1) by the output that can realize different rotating speeds that moves left and right of output shaft, compared to traditional gear train speed change, and compact structure, simple to operate, save cost of production;
(2) increase counter gear, can realize the reverse gear action of vehicle etc., met the demand in Vehicle Driving Cycle process, more hommization.
Brief description of the drawings
For content of the present invention is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation below, wherein:
Fig. 1 is structural representation of the present invention.
Wherein: 1, output shaft, 2, output shaft external splines, 3, counter gear, 4, gear shaft, 5, secondary planetary gear, 6, shell, 7, planet carrier, 8, planet carrier internal spline, 9, shell ring gear, 10, primary planet pinion, 11, input shaft external gear, 12, input shaft internal spline, 13, input shaft.
Embodiment
Embodiment 1
As shown in Figure 1, a kind of gear, comprise input device, output unit, shell 6 and be installed on the planetary gears in described shell 6, planetary gears comprises planet carrier 7 and planetary pinion, planet carrier 7 is fixedly installed on described shell 6 inside, on planet carrier 7, be provided with described planetary pinion, input device is connected with output unit by planetary gears.
In above-mentioned gear, shell 6 is hollow circular cylinder shape, and shell 6 one side inside are fixedly installed shell ring gear 9, and shell ring gear 9 is one-body molded with shell 6, and processing is simple.
Planetary pinion comprises the primary planet pinion 10 and the secondary planetary gear 5 that are arranged at respectively planet carrier 7 two ends, in the middle of planet carrier 7, be provided with planet carrier internal spline 8, primary planet pinion 10 is fixedly installed on planet carrier 7 one end by gear shaft 4, and be connected with a joggle with shell ring gear 9, secondary planetary gear 5 is arranged on shell 6 by gear shaft 4, and is connected with a joggle with the ring gear of planet carrier 7 the other ends.
Input device comprises input shaft 13, and input shaft 13 is provided with input shaft external gear 11 and input shaft internal spline 12, and input shaft 13 is connected with a joggle by input shaft external gear 11 and primary planet pinion 10.
Output unit comprises output shaft 1, output shaft 1 is provided with output shaft external splines 2, and output shaft external splines 2 matches with planet carrier internal spline 8, input shaft internal spline 12, and output shaft 1 moves left and right, can be connected with planet carrier internal spline 8 or input shaft internal spline 12 respectively, thus the rotating speed of regulation output.
One grade: the output shaft external splines 2 of output shaft 1 is connected with input shaft internal spline 12, input shaft 13 directly drives output shaft 1 to rotate, and output speed equates with input speed.
Second gear: the output shaft external splines 2 of output shaft 1 is connected with planet carrier internal spline 8, input shaft 13 drives primary planet pinion 10 to rotate by input shaft external gear 11, primary planet pinion 10 drives planet carrier 7 to rotate, thereby drive output shaft 1 to rotate, be output as deceleration, by the output that can realize different rotating speeds that moves left and right of output shaft 1, compared to traditional gear train speed change, compact structure, simple to operate, save cost of production.
Embodiment 2
As preferred embodiment, all the other are identical with embodiment, and difference is, also comprises counter gear 3, and the external gear of counter gear 3 and secondary planetary gear 5 are connected with a joggle, and the internal spline of counter gear 3 and output shaft external splines 2 match.
Reverse gear: the output shaft external splines 2 of output shaft 1 is connected with the internal spline of counter gear 3, input shaft 13 drives primary planet pinion 10 to rotate by input shaft external gear 11, primary planet pinion 10 drives planet carrier 7 to rotate, planet carrier 7 drives the secondary planetary gear 5 being connected with planet carrier ring gear 8 to rotate, secondary planetary gear 5 drives counter gear 3 to rotate, thereby drives output shaft 1 to reverse, and can realize the reverse gear action of vehicle etc., meet the demand in Vehicle Driving Cycle process, more hommization.
Above-described specific embodiment; object of the present invention, technological scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.