CN201046758Y

CN201046758Y - Electric vehicle driving speed-change gear

Info

Publication number: CN201046758Y
Application number: CNU2007201098411U
Authority: CN
Inventors: 周嘉麟; 李跃岩
Original assignee: TAIZHOU CITY HUANGYAN HUAYANG ELECTRIC BICYCLE CO Ltd
Current assignee: TAIZHOU CITY HUANGYAN HUAYANG ELECTRIC BICYCLE CO Ltd
Priority date: 2007-05-25
Filing date: 2007-05-25
Publication date: 2008-04-16
Anticipated expiration: 2017-05-25

Abstract

The utility model relates to a drive and gear shifting mechanism of an electric vehicle, which comprises a gearbox; wherein, a motor is arranged in the gearbox, and the output shaft of the motor is driven by a gear shaft through a drive mechanism; the output shaft in turn drives the wheel hub of the electric vehicle. The utility model is characterized in that: the gear shaft of the motor drives a reducing gear set, which drives a shifting shaft; a friction shifting gear is arranged at one end of the shifting shaft, and an overrunning shifting gear is arranged at the other end of shifting shaft; the overrunning shifting gear drives an overrunning clutch, which is fitted with the output shaft. The friction shifting gear drives a multi-disc friction clutch, which is also fitted with the output shaft; a shifting device is arranged at one end of the friction clutch and connected with a steel cable stayguy, which is in turn connected with the handle bar of the electric vehicle. The utility model has the advantages of safe use, reliability, strong endurance capacity of the electric vehicle, effective protection of the battery and motor, smooth gear shifting, as well as convenient, flexible and reliable operations.

Description

Driving speed-changing mechanism of electric vehicle

Technical field

The utility model relates to the drive system of battery-driven car, particularly relates to driving speed-changing mechanism of electric vehicle.

Background technology

Battery-driven car (mainly referring to Electrical Bicycle) is the energy with the storage battery, by motor-driven, without the manpower pedal, saves the strength, and to compare noise low with internal combustion engine drive such as motor bike, no waste gas, pollute few, so comparatively fast developed.What but existing battery-driven car generally adopted is wheel hub motor, it is the low-speed DC motor direct-drive, when climbing or starting, can only rely on increase electric current (up to tens amperes) to obtain big torque, its result must cause the battery-driven car flying power to descend, even cause the damage of energy storage unit one storage battery, also can destroy motor if overload is excessive.

Summary of the invention

The purpose of this utility model is in order to overcome the shortcoming that prior art exists, function such as provide a kind of employing double-clutch speed change, gear shift, brake, surmount is in one, can be used for flat pavement running at a high speed, low speed is used for climbing, starting, and the clutch mode is easy to operate, driving speed-changing mechanism of electric vehicle flexibly.

The technical scheme of the utility model driving speed-changing mechanism of electric vehicle is: gearbox body is arranged, a motor is installed in the casing, drive output shaft by motor gear beam warp transmission device, output shaft drives electric vehicle hub, it is characterized in that described transmission device is: the motor gear axle drives train of reduction gears, train of reduction gears drives switching shaft, one of switching shaft the friction change gear is installed, the other end of switching shaft is installed and is surmounted change gear, surmount change gear and drive overriding clutch, overriding clutch matches with output shaft; The friction change gear drives multi-plate friction clutch, and multi-plate friction clutch matches with output shaft, at an end of friction clutch shifter is installed, and shifter connects the steel wire rope backguy, and the steel wire rope backguy connects the battery-driven car handgrip.

Driving speed-changing mechanism of electric vehicle of the present utility model, be equipped with transmission system by the high speed DC machine, particularly the driving system after the speed change can drive output shaft through multi-plate friction clutch or mono-directional overrun clutch respectively, the collection speed change, gear shift, braking, function such as surmount in one, the high speed DC machine of configurable 300W～1000W (for example rated speed of rotation 3000rpm), the one, can get (45Km/h) and low speed (15Km/h) at a high speed by transmission system, the high speed that multi-plate friction clutch combines with output shaft is applicable to flat pavement running, the low speed that overriding clutch combines with output shaft is applicable to climbing, starting, overcome prior art in climbing, can only rely on increase electric current (up to tens amperes) to obtain shortcomings such as big torque during starting, therefore, the technical program is safe in utilization, reliably, the battery-driven car flying power is strong, effectively protects battery, motor; Two is two kinds of power-transfer clutch combinations respectively, high speed or low speed output mutually noninterfere, the high, low speed gear shift relies on the combination of multi-plate friction clutch or separates and realize, overcome the shock problem that prior art adopts castellated engagement gear shift, it is steady that this mechanism has gear shift, control comfort, flexible, reliable.

Driving speed-changing mechanism of electric vehicle of the present utility model, its described train of reduction gears are that the motor gear axle drives the A gear, and the A gear is meshed with the B gear, the B gear is installed on the B gear wheel shaft, the C gear is installed on the B gear wheel shaft simultaneously, and the C gear is meshed with the D gear, and the D gear is installed on the switching shaft.Its described overriding clutch is to surmount change gear and surmount gear and be meshed, surmount the overriding clutch outer ring is installed in gear and the gear cap, installation surmounts bearing in the overriding clutch outer ring, and surmounting has the overriding clutch inner ring in the bearing, and the overriding clutch inner ring matches with output shaft.Its described friction clutch is that the friction change gear is meshed with slip gear, friction bearing and cover are arranged between slip gear and output shaft, slip gear connects the multi-plate friction clutch shell, install and fix dish on the output shaft, under the reaction plate displacement disc is arranged, outside friction disc and internal friction sheet and spring are installed between displacement disc and the reaction plate, outside friction disc and shell are circumferentially fixing, and a crown of spring the promotion dish, in the promotion dish bearing is installed, match with push rod in the bearing, push rod has the bar cover outward, and set screw is arranged in the push rod, and setting nut is arranged on the set screw, set screw contacts with cam, and cam connects the steel wire rope backguy.Its promotion dish and displacement disc have tie bolt, move in the work reliably, to displacement disc and reaction plate and upper and lower friction lining pressuring action.Its described spring is two, acts on more reliable.

Description of drawings

Fig. 1 is the utility model driving speed-changing mechanism of electric vehicle structural representation;

Fig. 2 is the utility model driving speed-changing mechanism of electric vehicle multi-plate friction clutch scheme drawing;

Fig. 3 is multi-plate friction clutch of the present utility model and shifter scheme drawing.

The specific embodiment

The utility model relates to driving speed-changing mechanism of electric vehicle, as shown in Figure 1-Figure 3, gearbox body 1 is arranged, a motor 3 is installed in the casing, drive output shaft by motor gear axle 31 through transmission device, output shaft drives electric vehicle hub, its major technology is characterised in that described transmission device is: motor gear axle 31 drives train of reduction gears, train of reduction gears drives switching shaft 8, one of switching shaft 8 friction change gear 81 is installed, the other end of switching shaft is installed and is surmounted change gear 82, surmounts change gear 82 and drives overriding clutch 5, and overriding clutch 5 matches with output shaft 7; Friction change gear 81 drives multi-plate friction clutch 6, multi-plate friction clutch 6 matches with output shaft 7, end at multi-plate friction clutch 6 is installed shifter 4, and shifter connects steel wire rope backguy 2, and steel wire rope backguy 2 connects battery-driven car handgrip 21.This driving speed-changing mechanism of electric vehicle, be equipped with transmission system by the high speed DC machine, particularly the driving system after the speed change drives output shaft through multi-plate friction clutch or mono-directional overrun clutch respectively, the collection speed change, gear shift, braking, function such as surmount in one, the high speed DC machine of configurable 300W～1000W (for example rated speed of rotation 3000rpm), the one, can get (45Km/h) and low speed (15Km/h) at a high speed by transmission system, the high speed that multi-plate friction clutch combines with output shaft is applicable to flat pavement running, the low speed that overriding clutch combines with output shaft is applicable to climbing, starting has overcome prior art in climbing, can only rely on increase electric current (up to tens amperes) to obtain shortcomings such as big torque during starting; Two is two kinds of power-transfer clutch combinations respectively, at a high speed or low speed output mutually noninterfere, the high, low speed gear shift relies on the combination of multi-plate friction clutch or separates and realize, has overcome the shock problem that prior art adopts castellated engagement gear shift.Therefore, the technical program is safe in utilization, reliable, and the battery-driven car flying power is strong, effectively protects battery, motor, and it is steady to have a gear shift, control comfort, flexibly.Its described train of reduction gears is that motor gear axle 31 drives A gear 12, A gear 12 is meshed with B gear 13, and B gear 13 is installed on the B gear wheel shaft 14, and C gear 15 is installed on B gear wheel shaft 14 simultaneously, C gear 15 is meshed with D gear 16, and D gear 16 is installed on the switching shaft 8.The one-level transmission of this mechanism is that A gear 12 is passed to B gear wheel shaft 14 with 13 engagements of B gear with motion; The secondary transmission is that C gear 15 is meshed with D gear 16, and switching shaft 8 is passed in motion; Three grades of transmissions are that the branch two-way is passed to two power-transfer clutchs with motion.Its described overriding clutch 5 is to surmount change gear 82 and surmount gear 51 and be meshed, surmount in gear 51 and the gear cap 52 overriding clutch outer ring 53 is installed, install in the overriding clutch outer ring 53 and surmount bearing 54, surmounting has overriding clutch inner ring 55 in the bearing 54, overriding clutch inner ring 55 matches with output shaft 7.The overriding clutch effect has three, and the first combines rotating speed when high when multi-plate friction clutch 6 with output shaft 7, and work does not take place overriding clutch; It two is when battery-driven car stops, multi-plate friction clutch 6 is pulled to separating shelves, but just go-cart; It three is when multi-plate friction clutch 6 separates, and surmounts gear 51 and surmounts change gear 82 engaged transmission overriding clutch outer ring 53 is passed in motion, but surmount the just tight inside and outside circle of contract of bearing 54, makes output shaft 7 slow runnings.Its described friction clutch 6 is that friction change gear 81 is meshed with

slip gear

61,7 of slip gear 61 and output shafts have friction bearing 62 and cover 63, slip gear 61 connects multi-plate friction clutch shell 64, install and fix dish 72 on the output shaft 7, reaction plate has displacement disc 71 72 times, outside friction disc 74 and internal friction sheet 75 and spring 73 are installed between displacement disc 71 and the reaction plate 72, outside friction disc 74 is circumferentially fixing with shell 64, one crown of spring 73 promotion dish 76, bearing 77 is installed in the promotion dish 76, match with push rod 65 in the bearing 77, bar cover 66 is arranged outside the push rod 65, set screw 67 is arranged in the push rod 65, setting nut 68 is arranged on the set screw 67, set screw 67 contacts with cam 69, and cam 69 connects steel wire rope backguy 2.Multi-plate friction clutch 6 is when work, high-speed motion is passed to slip gear 61 by friction change gear 81, with the fixing clutch outer member 64 of slip gear also high speed rotating, because outside friction disc 74 is circumferentially fixing with clutch outer member 64, so outside friction disc 74 also obtains high speed rotating.When cam 69 is motionless, order about inside and outside friction lining 75,74 at promotion dish 77 under the effect of spring 73 power and be pressed between the upper and lower end face of displacement disc 71 and reaction plate 72, rely on friction force that motion is passed on the output shaft 7.Behind the handle that rotates on the battery-driven car handgrip, when clockwise rotating by steel wire rope backguy 2 power cam 69, cam 69 will be depressed power-transfer clutch push rod 65, promote displacement disc 71 through promotion dish 76, thereby force spring 73 compressions, displacement disc 71 moves down, so the distance between the upper and lower end face of displacement disc 71 and reaction plate 72 becomes big, inside and outside friction lining 75,74 axial separation, output shaft 7 will stop operating.This mechanism is by the inside and outside friction lining transmitting movement of multi-disc, particularly drive cam 69 through pulling steel wire rope backguy 2 with the rotary handle that connects battery-driven car handgrip 21, making the friction lining separation reach output shaft 7 stops operating, after switching, work by overriding clutch 5, have and be skillfully constructed, easy to operate, reliable for effect.Set screw 67 and setting nut 68 are installed in push rod 65 simultaneously, adjusting cam 69 running surfaces and the gap that is driven between the part running surface effectively, the manipulation that obtains can to make behind the reasonable clearance power-transfer clutch is more flexibly, reliably.Its promotion dish 76 has tie bolt 78 with displacement disc 71, moves in the work reliably, to displacement disc and reaction plate and upper and lower friction lining pressuring action.Its described spring 73 is two, and two actions of the spring are reliable.

Claims

1. driving speed-changing mechanism of electric vehicle, gearbox body (1) is arranged, a motor (3) is installed in the casing, drive output shaft by motor gear axle (31) through transmission device, output shaft drives electric vehicle hub, it is characterized in that described transmission device is: motor gear axle (31) drives train of reduction gears, train of reduction gears drives switching shaft (8), one of switching shaft (8) friction change gear (81) is installed, the other end of switching shaft is installed and is surmounted change gear (82), surmount change gear (82) and drive overriding clutch (5), overriding clutch (5) matches with output shaft (7); Friction change gear (81) drives multi-plate friction clutch (6), multi-plate friction clutch (6) matches with output shaft (7), end at multi-plate friction clutch (6) is installed shifter (4), shifter connects steel wire rope backguy (2), and steel wire rope backguy (2) connects battery-driven car handgrip (21).

2. driving speed-changing mechanism of electric vehicle as claimed in claim 1, it is characterized in that described train of reduction gears is that motor gear axle (31) drives A gear (12), A gear (12) is meshed with B gear (13), B gear (13) is installed on the B gear wheel shaft (14), C gear (15) is installed on B gear wheel shaft (14) simultaneously, C gear (15) is meshed with D gear (16), and D gear (16) is installed on the switching shaft (8).

3. driving speed-changing mechanism of electric vehicle as claimed in claim 1, it is characterized in that described overriding clutch (5) is to surmount change gear (82) and surmount gear (51) and be meshed, surmount overriding clutch outer ring (53) is installed in gear (51) and the gear cap (52), install in the overriding clutch outer ring (53) and surmount bearing (54), surmounting has overriding clutch inner ring (55) in the bearing (54), overriding clutch inner ring (55) matches with output shaft (7).

4. driving speed-changing mechanism of electric vehicle as claimed in claim 1, it is characterized in that described friction clutch (6) is that friction change gear (81) is meshed with slip gear (61), friction bearing (62) and cover (63) are arranged between slip gear (61) and output shaft (7), slip gear (61) connects multi-plate friction clutch shell (64), install and fix dish (72) on the output shaft (7), displacement disc (71) is arranged under the reaction plate (72), outside friction disc (74) and internal friction sheet (75) and spring (73) are installed between displacement disc (71) and the reaction plate (72), outside friction disc (74) is circumferentially fixing with shell (64), one crown of spring (73) promotion dish (76), bearing (77) is installed in the promotion dish (76), match with push rod (65) in the bearing (77), bar cover (66) is arranged outside the push rod (65), set screw (67) is arranged in the push rod (65), setting nut (68) is arranged on the set screw (67), and set screw (67) contacts with cam (69), and cam (69) connects steel wire rope backguy (2).

5. driving speed-changing mechanism of electric vehicle as claimed in claim 1 is characterized in that promotion dish (76) and displacement disc (71) have tie bolt (78).

6. driving speed-changing mechanism of electric vehicle as claimed in claim 1 is characterized in that described spring (73) is two.