CN201179949Y - Optional switching to pedal-driven motor transmission - Google Patents

Abstract

A transmission device that can be switched to a motor driven by a pedal, including a housing, a pedal shaft and a sprocket, the pedal shaft is provided with an output sleeve, and the sprocket is fixedly installed at one end of the output sleeve , the other end of the output sleeve is installed with the first ratchet and pawl assembly for pedal driving, and the ratchet and pawl assembly is installed on the pedal shaft at the same time; the output sleeve is also installed with flat teeth side by side The embedded clutch and worm gear assembly and the second ratchet and pawl assembly for motor drive, the planar jaw clutch is adjacent to the ratchet and pawl assembly, including a fixed jaw and a movable jaw and the extraction fork, the fixed tooth panel is fixed with the worm wheel, the movable tooth panel is movably installed on the output sleeve, and the extraction fork is movably installed in the housing and fixed with the movable tooth panel. By changing the connection of the transmission system, the pedal drive can drive the motor in reverse, so that the whole vehicle can become an exercise vehicle that can adjust the intensity of exercise.

Description

Optional switching to pedal-driven motor transmission

Technical field

The utility model relates to a transmission part of an electric power-assisted vehicle, in particular to a transmission device for an electric power-assisted vehicle to be optionally switched to a pedal-driven motor.

Background technique

Most of the manufacturers of electric vehicles on the market currently use in-wheel motors, mainly because the use of in-wheel motors can save the transmission mechanism, and the structural layout is relatively simple. The existing hub motor type electric bicycle is to change the hub of one of the wheels of the bicycle into a hub motor, and the pedal drives the rear wheel through a sprocket, a chain and a one-way flywheel, so the motor is driven without a chain. Therefore, pedal drive and electric are independent of each other, which determines that the hub motor type electric bicycle is not suitable for the development of additional functions such as gear shifting, clutch control, power generation exercise bike, etc., and the expansion of functions is not flexible enough. In addition, when mass-produced, due to the manufacturing process of the hub motor, compared with the traditional low-voltage DC permanent magnet motor, its production efficiency is lower, so the cost is relatively high, which restricts the output to a certain extent.

Except for electric bicycles using in-wheel motors, other transmission forms are only "wheel side motors", namely (1). The motor is installed on the side of the rim of the wheel (front or rear wheel), and the motor shaft directly drives the rim of the wheel , (2). The motor is installed on the side of the rear wheel shaft, the axis is perpendicular to the rear wheel shaft, and the motor shaft drives the rear wheel through a bevel gear. However, the wheel side motor is also separated from the motor and the pedal, and the electric drive and the pedal drive are not related to each other. And the function of existing electric moped is single, and body-building effect is general.

Utility model content

The purpose of this utility model is to provide a transmission device that can be switched to a motor driven by pedals. This transmission mechanism enables the electric bicycle to be used as a general vehicle, and can also be driven by the pedals by changing the connection of the transmission system. Drive the motor in turn to change the resistance on the pedals, making the whole bike an exercise bike that can adjust the intensity of exercise.

The technical solution of the utility model can be realized through the following technical measures. A transmission device that can be switched to a pedal-driven motor, including a housing, a pedal shaft and a sprocket, is characterized in that the pedal shaft is provided with There is an output sleeve, the sprocket is fixedly installed at one end of the output sleeve, and the other end of the output sleeve is installed with the first ratchet pawl assembly for pedal driving, and the ratchet pawl assembly is installed at the same time On the pedal shaft; the output sleeve is also installed side by side with a plane jaw clutch and a worm gear assembly and a second ratchet pawl assembly for realizing motor drive, and the ratchet wheel of the second ratchet pawl assembly Opposite to the sprocket, the planar jaw clutch is adjacent to the ratchet pawl assembly, including a fixed jaw, a movable jaw and a fork, and the fixed jaw is connected to the worm gear assembly. The formed worm gear is fixed, the movable tooth insert is movably installed on the output sleeve, and the fork is movably installed in the housing and sleeved on the outer circumference of the movable tooth insert.

The worm of the worm gear assembly of the utility model is connected with the shaft coupling of the motor, so that the motor can be driven. During normal driving, the fixed tooth insert and the movable tooth insert are in a separated state. Since the pedal shaft and the output sleeve are connected through a one-way transmission ratchet mechanism, the output sleeve will not drive the pedal shaft to rotate, so that the electric drive and the pedal drive can be realized without interfering with each other, and the two can be input separately or simultaneously. power. Under normal conditions, the fixed tooth panels are separated from the movable tooth panels. When the shift fork is controlled to move laterally, the movable tooth panels and the fixed tooth panels are engaged, and the worm gear is driven to rotate while driving the output sleeve, thereby driving The motor generates electricity.

The housing described in the utility model is equipped with a laterally movable shift fork shaft parallel to the pedal shaft, the shift fork is fixed on the shift fork shaft, and the fork-shaped part of the shift fork is sleeved on the outer circumference of the movable tooth insert.

The utility model can be improved as follows: a spline sleeve is provided between the movable tooth insert and the output sleeve, the movable tooth insert is movably fitted on the spline sleeve, and the spline sleeve and the output sleeve The cylinders are connected by flat keys, and the movable tooth insert can move on the spline sleeve under the action of the pulling fork, so as to achieve engagement or separation with the fixed tooth insert.

The utility model can also be improved as follows: the first ratchet and pawl assembly provided at the end of the output sleeve includes an outer ratchet and a pawl, and the pawl is installed on the pedal shaft, that is, the pedal shaft simultaneously serves as As for the ratchet seat, one end of the outer ratchet is sleeved on the pedal shaft, that is, matched with the ratchet, and the other end is threadedly connected with the output sleeve.

The utility model can be improved as follows, the worm gear assembly is located in the middle of the output sleeve to ensure the stable operation of the mechanism.

The fixed jaw plate of the plane jaw clutch and the worm wheel of the worm gear assembly are provided with mounting holes perpendicular to the disk surface, and the two are fixed by bolts.

The housing is divided into two halves, which are butted laterally. One end of the output sleeve protrudes out of the housing, and the sprocket is fixedly installed at the end of the protruding end.

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

(1). The transmission mechanism described in the utility model adopts a worm gear mechanism, which effectively realizes the change of the force transmission direction and saves design space;

(2). The transmission mechanism described in the utility model also utilizes the characteristics of one-way transmission of the ratchet and pawl mechanism, so that the motor drive and the pedal drive of the electric bicycle using the utility model can not interfere with each other, and the two kinds of power can be used at the same time Input, and two kinds of power can be input separately, the control is simple and flexible, which greatly facilitates the user;

(3). The utility model is equipped with a unique planar jaw clutch, which is combined with the worm gear, and the two systems of the electric motor and the pedal that do not interfere with each other can be changed to make the pedal drive the motor in reverse through manipulation. Form a pedal power generation circuit. In addition to being used as a general means of transportation, the electric power-assisted bicycle can also change the connection of the transmission system to make the motor a generator, and change the load connected to the motor to change the resistance on the pedals, making the whole vehicle Become an exercise bike that can adjust the intensity of your workout.

Description of drawings

Fig. 1 is a transmission structure sectional view of the utility model;

Fig. 2 is an exploded view of the structure of the planar jaw clutch of the transmission structure of the present invention.

Detailed ways

The specific embodiment of the utility model is shown in Figure 1 and Figure 2, a transmission mechanism that can be switched to a pedal-driven motor, including a housing 6, a pedal shaft 7 and a sprocket 10, and the pedal shaft 7 is provided with The output sleeve 5 and the housing 6 are divided into two halves, which are horizontally butted together. One end of the output sleeve 5 protrudes out of the housing 6. The sprocket 10 is fixedly installed on the end of the output sleeve 5. The output The other end of the sleeve 5 is installed with the first ratchet and pawl assembly for pedal driving, including the outer ratchet 8 and the pawl 9, and the pawl 9 is installed on the pedal shaft 7, that is, the pedal shaft 7 serves as a pawl seat at the same time , One end of the outer ratchet 8 is sleeved on the pedal shaft 7, that is, matched with the ratchet 9, and the other end is threadedly connected with the output sleeve 5. Also installed side by side on the output sleeve 5 is a plane jaw clutch and a worm gear assembly and a second ratchet pawl assembly for realizing motor drive, including a ratchet wheel 14, a ratchet wheel 15 and a ratchet seat 16, and the ratchet wheel 14 is The outer ratchet, opposite to the sprocket 10, has a keyway on the inner wall of the pawl seat 16 for fixing with the output sleeve 5, and the worm wheel 2 and the ratchet 14 are concentrically arranged and fixedly connected. The worm gear assembly is located in the middle of the output sleeve 5, and includes a worm 11 and a worm wheel 12, which are meshed with each other. The planar jaw clutch includes a fixed jaw plate 1, a movable jaw plate 2 and a fork 3. Both the fixed jaw plate 1 and the worm wheel 12 are provided with mounting holes perpendicular to their disk surfaces, and the two are fixed by bolts. The housing 6 is equipped with a laterally movable shift fork shaft 13 parallel to the pedal shaft 7, the shift fork 3 is fixedly mounted on the shift fork shaft 13, and the fork-shaped part 31 of the shift fork 3 is set on the outside of the movable tooth insert 2 on the circumference. There is also a spline sleeve 4 between the movable tooth insert 2 and the output sleeve 5, the movable tooth insert 2 is movably set on the spline sleeve 4, and the surface of the inner hole of the spline sleeve 4 is provided with a keyway, which is connected with the output sleeve. The cylinders 5 are connected by flat keys, and the movable tooth panel 2 can move laterally on the spline sleeve 4 under the action of the pulling fork, so as to achieve engagement or separation with the fixed tooth panel 1 . A push-pull lever that can be manipulated is provided outside the housing 6, and the shift fork shaft 13 can be pushed in or pulled out laterally, and the shift fork 3 moves laterally with the movement of the shift fork shaft 13.

The working process is as follows:

The worm screw 11 of the worm gear assembly of the present utility model is connected with the shaft coupling of the motor, and the motor drive can be realized. During normal driving, the fixed tooth insert 1 and the movable tooth insert 2 are in a separated state. At this time, the motor drive and the pedal drive do not interfere with each other, and the vehicle can be driven normally by electricity or pedals, or both can input power at the same time. When the shift fork 3 is controlled to move laterally, the movable tooth panel 2 is engaged with the fixed tooth panel 1, and the output sleeve 5 is driven while the worm wheel 12 is driven to rotate, thereby driving the motor to generate electricity. At this time, the rider pedals Moving the pedal, the pedal shaft 7 drives the output sleeve 5 through the ratchet 9 and the outer ratchet 8, thereby driving the worm screw 11 and the motor. The cyclist can change the resistance value of the load connected to the motor through the circuit system to change the resistance of the pedals to achieve the desired fitness intensity.

In the above-mentioned embodiments, the shift fork shaft can also be designed to work by rotation: the matching hole between the shift fork shaft and the shift fork is processed into a threaded fit with a large pitch. The shift fork shaft is used as a screw rod, and the shift fork is used as a nut. When the shift fork shaft is rotated, the shift fork as the nut will move laterally thereupon, and the shift fork shaft can only rotate but not move laterally.

Claims (7)

1. available switching to ridden the driving device that drives motor, comprise housing, pedal shaft and sprocket wheel, it is characterized in that described pedal shaft is provided with the output sleeve, described sprocket wheel is fixedly mounted on an end of output sleeve, the other end of output sleeve is equipped with and is used to realize the foot-driven first click assembly, and this click assembly is installed on the pedal shaft simultaneously; Plane dental clutch, worm and gear assembly also are installed on the described output sleeve side by side and are used to realize the motor-driven second click assembly, the ratchet of the second click assembly is relative with described sprocket wheel; Described plane dental clutch is adjacent with the first click assembly, comprise fixedly tooth panel, movable teeth panel and fork, the worm gear of described fixedly tooth panel and worm and gear assembly fixes, described movable teeth panel is movably arranged on the output sleeve, described fork is movably arranged in the housing, and is enclosed within on the excircle of movable teeth panel.

2. a kind of available foot-operated driving device that drives motor that switches to according to claim 1, it is characterized in that being equipped with in the described housing transversely movable declutch shift shaft, parallel with pedal shaft, shift fork is fixed on the declutch shift shaft, and the fork-shaped of shift fork partly is enclosed within on the excircle of movable teeth panel.

3. a kind of available foot-operated driving device that drives motor that switches to according to claim 2, it is characterized in that being provided with spline housing between described movable teeth panel and the output sleeve, movable teeth panel movable set is on this spline housing, and described spline housing is connected by flat key between the sleeve with output.

4. a kind of available foot-operated driving device that drives motor that switches to according to claim 3, it is characterized in that the first click assembly that described output sleeve ends is provided with comprises outer ratchet and pawl, described ratchet is installed on the pedal shaft, be that pedal shaft is simultaneously as pawl base, one end of described outer ratchet matches with ratchet, the other end with output sleeve between by being threaded.

5. according to claim 1 or 4 described a kind of available foot-operated drivings device that drive motor that switch to, it is characterized in that described worm and gear assembly comprises worm and worm wheel, the two is meshed, and is positioned at the middle part of output sleeve.

6. a kind of available foot-operated driving device that drives motor that switches to according to claim 5, it is characterized in that being equipped with on the worm gear of the fixedly tooth panel of described plane dental clutch and worm and gear assembly mounting hole, pass through bolt between the two perpendicular to its card.

7. a kind of available foot-operated driving device that drives motor that switches to according to claim 6, it is characterized in that described housing dimidiation, laterally butt joint forms, and a wherein end of described output sleeve reaches outside the housing, and sprocket wheel is fixedly mounted on the end of this external part.

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