CN204250286U - A kind of middle dual-power driving device for intelligent bicycle - Google Patents

Abstract

The utility model discloses a middle-mounted dual-power driving device for an intelligent bicycle, which comprises a casing, a rotating shaft hole is arranged in the casing, a pedal rotating shaft is arranged in the rotating shaft hole, and the pedal rotating shaft The upper sleeve is provided with a hollow motor shaft that can rotate relative to it, and the motor rotor is fixed on the hollow motor shaft, and the motor fixed on the housing is located outside the motor rotor in the housing. Stator, the housing is provided with an output shaft hole concentric with the shaft hole, and the output shaft hole is equipped with an output shaft that is fitted on the pedal shaft and can rotate relative to the pedal shaft. Hollow shaft, the output hollow shaft is provided with a first overrunning clutch and a second overrunning clutch, the first overrunning clutch is connected with the pedal shaft, and the second overrunning clutch is connected with the motor There is a reduction device between the rotors.

Description

A mid-mounted dual power drive device for smart bicycles

【Technical field】

The utility model relates to a novel intelligent power-assisted bicycle, more specifically a dual-power driving device for a bicycle.

【Background technique】

Due to the increasing environmental and traffic pressures, green travel has become a trend of travel. Bicycle travel is one of the best choices for green travel due to its small size and weight. Long-distance and long-distance bicycle travel consumes a lot of physical energy for travelers. And existing electric bicycle volume is larger, and weight is heavier. Moreover, when the existing electric bicycle is driven by all manpower, since there is no separation between the motor and the output shaft, the manpower needs to overcome the magnetic damping of the motor at the same time, which consumes a lot of physical strength.

【Content of utility model】

The utility model overcomes the deficiencies of the prior art, and provides a simple structure, low cost, small volume, light weight, which can effectively make the motor work at a high-efficiency speed, and the pedal rotating shaft and the motor are both clutched with the output shaft. A mid-mounted dual power drive device for a smart bicycle.

The utility model is achieved through the following technical solutions:

A middle-mounted dual-power driving device for smart bicycles, comprising a housing 1, characterized in that: the housing 1 is provided with a shaft hole 101, and the shaft hole 101 is equipped with a pedal shaft 2, so The pedal shaft 2 is covered with a hollow motor shaft 3 that can rotate relative to it, the hollow motor shaft 3 is fixed with a motor rotor 4, and the housing 1 is located outside the motor rotor 4 A motor stator 5 fixed on the housing 1 is provided, and the housing 1 is provided with an output shaft hole 102 concentric with the shaft hole 101, and the output shaft hole 102 is equipped with a The output hollow shaft 6 on the pedal shaft 2 that can rotate relative to the pedal shaft 2 is provided with a first overrunning clutch 7 and a second overrunning clutch 8 inside the output hollow shaft 6. An overrunning clutch 7 is connected with the pedal rotating shaft 2 , and a reduction gear 9 is arranged between the second overrunning clutch 8 and the motor rotor 4 .

The above-mentioned mid-mounted dual-power driving device for smart bicycles is characterized in that: the first overrunning clutch 7 includes a first inner ring gear 71 arranged in the output hollow shaft 6, the The first inner ring gear 71 is provided with a first clutch disc 72 capable of rotating therein, and the outer peripheral side of the first clutch disc 72 is provided with a first notch 721 extending axially and a first circumferential groove 722, the first notch 721 is provided with a first pawl 73 that rotates therein, and the first circumferential groove 722 is provided with a dial to move the first pawl 73 outward The first elastic expansion ring 74.

The above-mentioned mid-mounted dual-power driving device for smart bicycles is characterized in that: the second overrunning clutch 8 includes a second inner ring gear 81 arranged in the output hollow shaft 6, the The second inner ring gear 81 is provided with a second clutch disc 82 capable of rotating therein, and the outer peripheral side of the second clutch disc 82 is provided with a second notch 821 extending axially and a second circumferential groove 822, The second notch 821 is provided with a second ratchet 83 that rotates therein, and the second circumferential groove 822 is provided with a second elastic force that moves the second ratchet 83 outward. Expansion ring 84.

The above-mentioned mid-mounted dual-power driving device for smart bicycles is characterized in that: the first elastic expansion ring 74 is C-shaped.

The above-mentioned mid-mounted dual-power driving device for a smart bicycle is characterized in that: the first inner ring gear 71 is aligned with the second inner ring gear 81 .

The above-mentioned mid-mounted dual-power driving device for smart bicycles is characterized in that: the first notch 721 includes a first arc-shaped notch 72a and a first oblique notch 72b connected thereto, and the first A ratchet 73 comprises the first arc part 73a that matches and rotates in the first arc notch part 72a and the square claw head 73b that is connected with it, and the square claw head 73b is provided with for the described square claw head 73b. The first elastic expansion ring 74 snaps into the first pawl groove 73c.

The above-mentioned mid-mounted dual-power driving device for smart bicycles is characterized in that: the reduction gear 9 includes an inner ring gear 902 fixedly arranged in the housing 1, and the hollow motor shaft 3 An eccentric part 301 housed in the housing 1 is provided on the top, and a double stepped planetary gear 904 capable of rotating around its center is mounted on the eccentric part 301. The double stepped planetary gear 904 includes a The first-stage high-position gear 941 and the two-stage low-position gear 942, the first-stage high-position gear 941 meshes with the described ring gear 902, and the second clutch disc 82 is fixedly connected with the second-stage low-position gear 942 meshed output ring gear 10.

The above-mentioned mid-mounted dual-power driving device for smart bicycles is characterized in that: the hollow motor shaft 3 is equipped with a dynamic balance weight 305 that can rotate around it.

Compared with the prior art, the utility model has the following advantages:

1. Both the pedal rotating shaft and the motor of the utility model are clutched with the output shaft, and the motor and the pedal can provide power to the output shaft at the same time, and when the motor cannot provide power and only the pedal is used to drive, the motor and the pedal Disengage through the second overrunning clutch, without overcoming the motor damping, saving effort.

2. The overrunning clutch of the utility model adopts the elastic expansion ring and the pawl to cooperate with the clutch, which is safe and reliable, and is not easy to slip.

3. The utility model is equipped with a dynamic balance block on the hollow motor shaft, which has good balance.

4. The utility model adopts balance blocks to solve the balance problem, avoids the use of symmetrical double gears for balance, and has simple processing technology and low production cost.

【Description of drawings】

Fig. 1 is a front view of the utility model;

Fig. 2 is a sectional view of the utility model;

Fig. 3 is a schematic diagram of the separation state of the first overrunning clutch of the present invention;

Fig. 4 is a schematic diagram of the engaged state of the first overrunning clutch of the present invention;

Fig. 5 is a schematic diagram of the first inner ring gear of the utility model;

Fig. 6 is a front view of the first clutch disc of the present invention;

Fig. 7 is a left view of the first clutch disc of the present utility model;

Fig. 8 is a front view of the first pawl of the present invention;

Fig. 9 is a sectional view of the first spine A-A of the utility model;

Fig. 10 is a front view of the first elastic expansion ring of the utility model;

Fig. 11 is a schematic diagram of the separation state of the second overrunning clutch of the present invention;

Fig. 12 is a front view of the second clutch disc of the present invention.

【Detailed ways】

A mid-mounted dual-power driving device for smart bicycles, comprising a housing 1, the housing 1 is provided with a shaft hole 101, the shaft hole 101 is equipped with a pedal shaft 2, and the pedal The rotating shaft 2 is sleeved with a hollow motor shaft 3 that can rotate relative to it. The hollow motor shaft 3 is fixed with a motor rotor 4. The housing 1 is located outside the motor rotor 4 and is fixed on the The motor stator 5 on the housing 1, the housing 1 is provided with an output shaft hole 102 concentric with the shaft hole 101, and the output shaft hole 102 is equipped with the foot set in the The output hollow shaft 6 that can rotate relative to the pedal shaft 2 on the pedal shaft 2 is provided with a first overrunning clutch 7 and a second overrunning clutch 8 in the described output hollow shaft 6, and the first overrunning clutch 7 It is connected with the pedal rotating shaft 2, and a speed reduction device 9 is arranged between the second overrunning clutch 8 and the motor rotor 4. Both the pedal rotating shaft and the motor are clutched with the output shaft, and the motor and the pedal can provide power to the output shaft at the same time, and when the motor cannot provide power and only the pedal is used to drive, the motor and the pedal pass through the second over The clutch is disengaged without overcoming the damping of the motor, which saves effort.

The first overrunning clutch 7 includes a first inner ring gear 71 arranged in the output hollow shaft 6, and the first inner ring gear 71 is provided with a first clutch disc capable of rotating therein. 72. The outer circumference of the first clutch disc 72 is provided with a first notch 721 extending axially and a first circumferential groove 722, and the first notch 721 is provided with a first ratchet rotating therein. The pawl 73, the first elastic expansion ring 74 that moves the first pawl 73 to expand outward is arranged in the first circumferential groove 722. The overrunning clutch adopts an elastic expansion ring and a ratchet to cooperate with the clutch, which is safe and reliable, and is not easy to slip.

The second overrunning clutch 8 includes a second inner ring gear 81 arranged in the output hollow shaft 6, and the second inner ring gear 81 is provided with a second clutch disc that can rotate therein. 82, the outer peripheral side of the second clutch disc 82 is provided with a second notch 821 extending axially and a second circumferential groove 822, and the second notch 821 is provided with a second pawl 83 rotating therein , the second circumferential ring groove 822 is provided with a second elastic expansion ring 84 that moves the second pawl 83 to expand outward.

The first elastic expansion ring 74 is C-shaped. Easy to install.

The first inner snap ring gear 71 is aligned with the second inner snap ring gear 81 . The first overrunning clutch 7 and the second overrunning clutch 8 have the same clutch structure and working principle.

The first notch 721 includes a first arc-shaped notch 72a and a first oblique notch 72b connected thereto, and the first pawl 73 includes a matching rotation in the first arc-shaped notch 72a. The first arc portion 73a and the square claw head 73b connected thereto, the square claw head 73b is provided with a first pawl groove 73c for the first elastic expansion ring 74 to snap into.

The reduction gear 9 includes an inner ring gear 902 fixedly arranged in the housing 1, and the hollow motor shaft 3 is provided with an eccentric portion 301 accommodated in the housing 1. The eccentric portion 301 of the eccentric part 301 is equipped with a double-connected stepped planetary gear 904 that can rotate around its center. The described double-connected stepped planetary gear 904 includes a high-level gear 941 and a low-level gear 942. The high-level gear 941 and The said ring gear 902 meshes, and said second clutch disc 82 is fixedly connected with the output ring gear 10 meshing with said secondary low gear 942 .

A dynamic balance weight 305 that can rotate around it is installed on the hollow motor shaft 3 . There is a dynamic balance block on the hollow motor shaft, which has good balance. The balance problem is solved by using a balance block, avoiding the use of symmetrical double gears for balance, the processing technology is simple, and the production cost is low.

The utility model adds electric power assist without changing the basic structure, volume, weight, use function, and physical exertion of the bicycle, and provides three modes: full-manpower mode, full-electric power mode, and human-electric hybrid power mode. The selected mid-mounted dual power drive unit.

The working principle of the utility model:

The three usage modes of the utility model are respectively: full human power mode; full electric power mode; human-electric hybrid power mode.

When the rider selects the full electric power mode through the mode, the maximum output torque and speed adjustment of the mid-mounted dual power drive device can be realized by controlling the maximum output power and speed of the brushless DC motor. The motor rotates and outputs the power from the hollow motor shaft 3. The eccentric part 301 of the hollow motor shaft 3 drives the double stepped planetary gear 904 to rotate and at the same time makes a differential tooth movement with the inner ring gear 902. The double stepped planetary gear 904 revolves with the eccentric part 301. At the same time, the ring gear 902 rotates around the center of the eccentric part 301 under the meshing resistance of the ring gear 902, and the second-stage low-position gear 942 of the double stepped planetary gear 904 makes a differential tooth movement with the output ring gear to drive the output ring gear 10 to rotate. The rotational speed of the output ring gear 10 is higher than that of the output hollow shaft 6 , the second overrunning clutch is engaged, and power is output from the output hollow shaft 6 . Now, because the pedal shaft 2 does not turn, the output hollow shaft 6 rotating speeds are higher than the pedal shaft 2, and the first super clutch 7 is separated, and the pedal shaft 2 remains in a non-rotating state.

When the rider selects human-electric hybrid power, at this moment, the foot pedal can be stepped on to drive the foot pedal shaft 2 to rotate. When the speed of the foot pedal shaft 2 is higher than that of the output hollow shaft 6, the first super clutch 7 is engaged, The pedal drives the output hollow shaft to rotate. At the same time, the rotational speed sensor detects the rotation signal of the pedal shaft 2 and starts the motor. The motor rotates and outputs the power from the hollow motor shaft 3. The eccentric part 301 of the hollow motor shaft 3 drives the double stepped planetary gear 904 to rotate and at the same time makes a differential tooth movement with the inner ring gear 902. The double stepped planetary gear 904 revolves with the eccentric part 301. At the same time, the ring gear 902 rotates around the center of the eccentric part 301 under the meshing resistance of the ring gear 902, and the second-stage low-position gear 942 of the double stepped planetary gear 904 makes a differential tooth movement with the output ring gear to drive the output ring gear 10 to rotate. The rotation speed of the output ring gear 10 is higher than that of the output hollow shaft 6, the second overrunning clutch is engaged, and the power is output from the output hollow shaft 6, so that the pedal force and the motor power jointly drive the hollow shaft 6.

When the pedal shaft 2 stops rotating or reverses, the speed sensor has no signal output, and the motor stops rotating.

When the cyclist selects the full-human drive, the hollow motor shaft 3 does not rotate, and the output ring gear 10 does not rotate. Since the output ring gear 10 rotates at a lower speed than the output hollow shaft 6, the second overrunning clutch 8 is disengaged. Output hollow shaft 6 keeps not rotating. Now, pedal shaft 2 can be stepped on to drive pedal shaft 2 to rotate, and the rotational speed of pedal shaft 2 is higher than output hollow shaft 6, the first super clutch 7 is engaged, and pedal shaft drives output hollow shaft to rotate independently.

Claims (8)

1. the middle dual-power driving device for intelligent bicycle, comprise housing (1), it is characterized in that: in described housing (1), be provided with shaft hole (101), described shaft hole (101) is built with foot-operated rotating shaft (2), described foot-operated rotating shaft (2) is arranged with the core motor axle (3) that can rotate to it, described core motor axle (3) is fixed with rotor (4), be positioned at described rotor (4) outside in described housing (1) and be provided with the motor stator (5) be fixed on described housing (1), described housing (1) is provided with the output shaft hole (102) concentric with described shaft hole (101), described output shaft hole (102) is built with being sleeved on the output hollow shaft (6) that described foot-operated rotating shaft (2) can be rotated relative to described foot-operated rotating shaft (2), the first overriding clutch (7) and the second overriding clutch (8) is provided with in described output hollow shaft (6), described the first overriding clutch (7) is connected with described foot-operated rotating shaft (2), speed reduction gearing (9) is provided with between described the second overriding clutch (8) and described rotor (4).

2. the middle dual-power driving device for intelligent bicycle according to claim 1, it is characterized in that: described the first overriding clutch (7) comprise be arranged in described output hollow shaft (6) first in latch circle (71), be provided with in latch circle (71) in described first and can rotate the first clutch discs (72) within it, described the first clutch discs (72) outer circumferential sides is provided with axially extended first breach (721) and the first circumferential groove in its end portion (722), the first ratchet (73) rotated is provided with within it in described the first breach (721), be provided with in described the first circumferential groove in its end portion (722) and stir described the first ratchet (73) outwardly the first elasticity tensioner ring (74).

3. the middle dual-power driving device for intelligent bicycle according to claim 2, it is characterized in that: described the second overriding clutch (8) comprise be arranged in described output hollow shaft (6) second in latch circle (81), be provided with in latch circle (81) in described second and can rotate the second clutch discs (82) within it, described the second clutch discs (82) outer circumferential sides is provided with axially extended second breach (821) and the second circumferential groove in its end portion (822), the second ratchet (83) rotated is provided with within it in described the second breach (821), be provided with in described the second circumferential groove in its end portion (822) and stir described the second ratchet (83) outwardly the second elasticity tensioner ring (84).

4. the middle dual-power driving device for intelligent bicycle according to claim 2, is characterized in that: the first described elasticity tensioner ring (74) is C font.

5. the middle dual-power driving device for intelligent bicycle according to claim 3, is characterized in that: in described first, latch circle (71) aligns with latch circle (81) in described second and is connected.

6. the middle dual-power driving device for intelligent bicycle according to claim 2, it is characterized in that: described the first breach (721) comprises the first arc notch portion (72a) and the coupled first oblique notch part (72b), described the first ratchet (73) is included in the first curved portions (73a) and coupled square claw head (73b) that in the first described arc notch portion (72a), coupling is rotated, described square claw head (73b) is provided with the first pawl slot (73c) snapped in for the first described elasticity tensioner ring (74).

7. the middle dual-power driving device for intelligent bicycle according to claim 3, it is characterized in that: described speed reduction gearing (9) comprises the internally toothed annulus (902) be fixedly installed in described housing (1), described core motor axle (3) is provided with the eccentric part (301) be contained in described housing (1), described eccentric part (301) is equipped with can around the duplex stepped planet gears (904) of its center rotating, described duplex stepped planet gears (904) comprises the high-order gear (941) of one-level and secondary low level gear (942), the high-order gear (941) of described one-level is engaged with described internally toothed annulus (902), described the second clutch discs (82) is fixedly connected with the output internally toothed annulus (10) engaged with described secondary low level gear (942).

8. the middle dual-power driving device for intelligent bicycle according to claim 7, is characterized in that: core motor axle (3) is equipped with the dynamic balance weight (305) that can rotate around it.