KR20090065486A - Auxiliary driving apparatus for bicycle - Google Patents

Abstract

A subsidiary actuating apparatus for a bicycle is provided to secure safety running and smooth running of the bicycle through an auto drive and release system using a spring and a lock device. A subsidiary actuating apparatus for a bicycle includes a mount(11a,11b), a driving motor(13), a reduction device(14), a driving roller(16), a spring(17), and a lock device. The mount is fixed to a seat tube of the bicycle and has motor supports. The driving motor is inserted into the space between the motor supports. The reduction device reduces the power of the motor and transfers the reduced power to the driving roller. The driving roller comes into contact with the tire of a rear wheel and drives the tire. The spring brings the driving roller into contact with the tire of the rear wheel all the time. The lock device restricts upward pull back of the driving roller.

Description

Auxiliary driving apparatus for bicycle

The present invention relates to a bicycle auxiliary drive device, and more specifically, a bicycle that can be driven by turning the pedal with a pedaling force as in a general bicycle, and when a larger driving force is required, the bicycle can be supplemented with the driving power of the electric motor for driving. It relates to an auxiliary drive.

In general, bicycles are known as excellent transport mechanisms that can drive with acceleration without using power.

Bicycles have no air pollution or noise pollution and are very useful as eco-friendly transportation and exercise equipment.

In particular, the rise in oil prices and overnourishment has led to an overwhelming welcome among modern people.

These bicycles have the convenience of movement when the distance is relatively short, and the use of bicycles is difficult to avoid on roads with high inclinations, and it is difficult to use the bicycles for long distances. It is a factor.

An electric bicycle is disclosed to reduce fatigue as well as the elderly and female while having such a convenient mobility of the bicycle.

For example, when a bike is going uphill or on a rough road, not on a flat surface, the rider can operate the drive motor to rotate the wheels with the driving force, allowing the bike to move at a relatively high speed without the need for the rider. .

The so-called electric bicycles known to date transmit the driving force of the electric motor to the sprocket of the rear wheel of the bicycle as a chain, and the main structure is equipped with a one-way clutch to avoid duplication with the pedals.

These structures suffer from the drawbacks of distracting, noisy and disturbing the inherent aesthetics of the bicycle due to the long power transmission distance.

Recently, a compact and high-performance rechargeable battery and motor have been developed to simplify the volume, and a structure for applying the driving power of the electric motor to the side of the rear tire has been introduced.

However, due to the noise generated by the reduction gear, the impact of the initial driving, the instability of the installation position, the inconvenience of operation and the like has not been put to practical use.

Noise generation and initial driving shock are due to the reduction gear consisting of sprocket and chain or gear combination, and the instability of the installation location and appearance disharmony are caused by the lack of ideas in pursuing the optimum structure.

Therefore, the present invention has been devised in view of the above points, the optimum installation position and the structure of high conformity, the variable structure that can overcome the difference in the resources of the bicycle, noise generation and initial driving shock can be alleviated. The driving stability of the bicycle can be secured by implementing a new type of auxiliary driving means including an auto driving and releasing system using a spring and a lock device, in particular in connection with the integrated rotation type of the motor and the reduction gear. Of course, it can smoothly drive the bicycle even in the poor driving conditions such as ramps, while maintaining excellent riding comfort as well as reducing noise and reducing initial driving shocks. The aim is to provide an auxiliary drive for the bike that can be improved. .

In order to achieve the above object, the auxiliary drive device for a bicycle provided by the present invention is fixed to a seat tube of a bicycle and has a motor support part of both sides to which the motor body can be fitted, and is inserted into the motor support part of the mount to both ends of the motor body. Drive motor is rotatably installed without being pulled out by the coupled ring, one side is fixed to the ring in the drive motor is rotatable together, and transmits to the drive roller side after decelerating motor side power by using pulley and belt transmission Reduction gear, a driving roller installed in the other side of the reduction gear with one-way bearing and rotatable, and driving the tire in contact with the rear wheel tire, one side is fixed to the mount and the other is in the ring of the drive motor A spring fixed so that the driving roller always contacts the rear tires, The entire driving roller including the driving motor and the speed reduction device during driving is characterized in that it comprises a lock device for restraining upward wetting over a certain angle.

Here, the locking device is composed of a locking projection formed on the mounting side and the locking pin protruding on one surface of the body portion of the reduction device, when the locking pin is caught by the stopper during upward rotation of the reduction device, the upward fold of the reduction device is constant. It is desirable to be able to be limited beyond the angle.

The auxiliary drive device preferably adjusts the installation direction of the mount fixed to the seat tube of the bicycle and the assembly direction between the mounts so that the structure can be changed so that the driving roller contacts the side surface instead of the front surface of the rear tire.

Bicycle auxiliary drive device provided in the present invention has the following advantages.

First, by using the power of the motor basically can easily drive the electric bicycle even in adverse conditions of driving conditions such as hills, the elderly, women, children, such as the physical condition disadvantaged users can conveniently use the electric bicycle.

Second, since power transmission and shifting are made of timing belts, noise is extremely low and initial driving shocks can be minimized. Accordingly, the motor is not overwhelmed and ride comfort is excellent.

Third, it can be easily installed on the seat tube of the existing bicycle, and the structure is simple, but the volume is small, so almost no burden on the appearance.

Fourth, while applying the integrated rotation type of the motor and the reduction gear can be automatically driven and released by using the spring and the lock device, the operation is convenient and easy to handle.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are perspective views showing an auxiliary drive device for a bicycle according to an embodiment of the present invention.

As shown in Fig. 1 and 2, the auxiliary drive is a means for forcibly turning the rear tire of the bicycle by using the driving force of the motor, the user can see the bicycle while operating the auxiliary drive properly as necessary You can ride comfortably, especially in difficult places, such as hills.

To this end, the auxiliary drive device includes mounts (11a) and (11b) as support means, a drive motor (13) as drive means, a speed reducer (14) as deceleration means, and a drive roller that substantially rotates the rear tires. (16) and the like.

The mounts (11a), (11b) is composed of two consisting of a semi-circular body having a flange portion at both ends, is installed by fastening in a form surrounding the seat tube 100 of the bicycle on both sides using a semi-circular body.

That is, the two mounts 11a and 11b are installed in a structure in which the seat tube 100 is centered and fastened.

Particularly, one of the two mounts 11a and 11b is provided in a form in which two motor support portions 10 having circular holes are fastened and assembled.

At this time, the motor support portion 10 is a portion for holding the drive motor 13, which is located side by side on both sides of the mount (11b), so that the hole center axis of each of the motor support portion 10 positioned in this way to form the same axis of a straight line do.

In addition, in the case of the mounts 11a and 11b, if the seat tube 100 side installation direction and the assembling direction thereof are adjusted, not only the front tire driving but also the side driving may be performed, which will be described later.

The driving motor 13 is a means for providing a driving force, and is electrically connected to an operation means (not shown) such as a switch attached to a handle of a bicycle and a power supply means (not shown) such as a battery, and is turned on by a user's operation. / OFF Drive

Here, the method of turning on / off the motor drive by the switch operation, etc. can be adopted without particular limitation as long as it is a method commonly known in the art.

On the other hand, in the embodiment of the present invention, although not shown may include a speed controller, a rechargeable battery, a shift circuit box, etc. installed in the handlebars, wherein the speed controller instructs the shift circuit input to the shift circuit box and the occupant It can be easily operated by hand, and its main function is to give delay time or slow start so that power is not suddenly applied when operating the drive motor.

In particular, the drive motor 13 is installed in a structure that can be rotated around its own axis of the motor body.

To this end, the drive motor 13 is fitted in the form of horizontally penetrating the holes of both motor support 10 in the mount (11b), and then two rings 12a, which are fastened to both ends of the motor body, ( 12b) is installed in a structure that is fixed so as not to fall out.

That is, the ring 12a, 12b is caught on the outer surface of both motor support 10, the drive body 13 can be supported so as not to fall in the axial direction.

Accordingly, the drive motor 13 is supported by the motor support unit 10 at both ends, and becomes freely rotatable about its own axis of the motor body. Due to this rotation structure, the drive roller 16 automatically rotates the rear wheels. It is possible to maintain the state always in contact with the tire 110 side, and also to maintain the state capable of transmitting the driving force while being automatically compressed to the rear wheel tire (110) side.

When the drive motor 13 rotates, scratches and the like may occur between the inner circumferential surface side of the motor support part 10 and the surface side of the motor body. In order to prevent this, the motor of the motor support part 10 and the drive motor 13 may be damaged. A resin bearing 21 made of polymer resin or the like is interposed between the bodies.

At this time, the resin bearing 21 serves to ensure smooth rotation of the drive motor 13 and effectively prevent damage, and to have a cross-section of the "b" shape in order to maintain a stable assembly state. Do.

The reduction device 14 is a part that serves to transfer the driving force of the driving motor 13 to the driving roller 16 side after appropriately decelerating the driving force.

The deceleration device 14 is also installed in a structure that is integrally coupled to the drive motor 13 side and rotated together when the composition motor 13 is rotated.

To this end, the body portion 14b of the deceleration device 14 is formed in a form in which two plates made of a long rod shape are coupled side by side while maintaining a predetermined distance from each other, toward both inner ends of the body portion 14b. Each of the driving pulley 14c and the driven pulley 14d are disposed, and the driving pulley 14c is coupled to the shaft of the driving motor 13 to receive the moder driving force directly, and the driven pulley 14d is the body portion ( It is coupled to the drive shaft 22 of the drive roller 16 which penetrates one end of 14b) and extends to the inside thereof, and finally outputs a driving force to the drive roller 16 side.

Then, both the driving pulley 14c and the driven pulley 14d are connected to each other by a belt 14e made of a timing belt or the like, so that transmission between the pulleys can be made.

Here, the two plates constituting the body portion 14b of the deceleration device 14 can maintain a predetermined distance by a plurality of supporters 14a fastened while penetrating between both plates, and in particular, the driving roller 16 At one end of the plate to which the drive shaft 22 belongs, two supporters 14a are placed close together and concentrated, so that the body portion 14b is firm against vibrations or shocks of the driving roller 16 rotating at high speed. It is possible to maintain the assembly rigidity.

For the deceleration function, the driven pulley 14c has a larger diameter than the drive pulley 14c, and accordingly, the driving force output from the drive motor 13, that is, the rotation speed is decelerated by a predetermined reduction ratio, It can be delivered to the final drive roller 16 side.

Such a reduction device 14 is integrally fixed to the ring 12b in the drive motor 13 by one end of the body portion 14b through a fastening structure of the supporter 14a, and thus the drive motor. At the time of rotation of the 13 can be rotated together.

In the deceleration device 14, the speed is controlled according to the operation of the speed controller by the information input to the circuit, and the deceleration and transmission structure leading to the driving pulley 14c, the driven pulley 14d, and the timing belt 14e is The driven pulley 14d has a larger diameter than the drive pulley 14c and has a deceleration function. The timing belt 14e has elasticity to mitigate the transmission shock of the power and to separate the pulleys apart from each other. Following this, the pulleys mesh with each other, reducing the severe noise generated when power is transmitted.

The driving roller 16 is a part directly contacting the tire with the driving force of the motor while directly contacting the rear tire 110.

The drive roller 16 is installed in a form that is integrally coupled to the drive shaft 22 is installed in a rotatable structure to the body portion 14b of the reduction device (14).

Accordingly, the driving roller 16 also rotates together with the driven pulley 14d of the reduction device 14 to rotate the rear tire 110 while rotating together.

In addition, a one-way bearing 15 such as a one-way clutch or the like is interposed between the drive roller 16 and the drive shaft 22, thereby freeing the drive roller 16 that is always in contact with the tire side when not driven. Rotation can be guaranteed.

Here, the installation method of the one-way clutch may be adopted without particular limitation as long as it is a method commonly used in the art.

In particular, the tire contact cross section of the drive roller 16 is made of a plane that is capable of point contact, the point contact with the tire side can be transmitted more efficiently while minimizing the contact load.

For example, when the roller contact cross section is in the form of a curved surface surrounding the tire surface, the roller is subjected to a load due to the difference between the center rotational speed of the cross section width and the outer rotation speed of the cross section width. By making the contact cross section flat, it is possible to secure an efficient driving system according to the elimination of load generation.

A spring 17 is provided as a means for maintaining a constant contact state between the drive roller 16 and the rear wheel tire 110.

One end of the spring 17 is fixed to the mount 11b, and the other end of the spring 17 is fixed to one side after extending a predetermined length while surrounding the outer circumferential surface of the ring 12a of the drive motor 13.

Accordingly, the spring 17 is always in a state of pulling the ring 12a in one direction, and eventually the driving motor 13, the speed reduction device 14, and the driving roller 16 also receive a force to rotate upward. Therefore, the drive roller 16 can maintain the state which is always in contact with the tire side.

This means that the inconvenience of the operation such as attaching and dropping the roller to the tire side while pulling a wire or the like by the user's operation as in the past can be eliminated.

When the driving roller 16 is rotated at a high speed in order to drive the rear wheel 110 by the driving roller 16, the driving roller 16 is squeezed to the tire side by the rotational force at this time, and is raised upward. In order for the drive roller 16 to apply a driving force while maintaining an appropriate crimping relationship with the tire side, it is necessary to control the position of the drive roller 16 in an appropriate line.

To this end, a means for preventing the driving motor 13, the reduction device 14, and the entire driving roller 16 from being flipped upward by a predetermined angle or more during rotation, i.e., maintaining the proper position of the driving roller 16 The locking device 18 is provided as a means for this.

The lock device 18 is composed of a stopper 19 and a locking pin 20 to engage with each other, the stopper 19 protrudes from one side of the outer peripheral surface of the motor support 10 in the mount (11b) It is formed in the form, the engaging pin 20 is installed in a form extending from the surface of the stopper 19 to the surface of one plate constituting the body portion 14b of the reduction device (14).

Here, the locking pin 20 is preferably selected from any one of a plurality of supporters 14a which are installed to maintain the gap between the plates, rather than separately installed, it is provided in a form that extends this longer.

Accordingly, when the driving motor 16, the speed reduction device 14, and the entire driving roller 16 are rotated upward while being driven up simultaneously with the rotation of the driving roller 16 during the driving using the driving roller 16, the Since the locking pin 20 is caught by the stopper 19, the driving motor 13, the reduction gear 14, and the driving roller 16 as a whole are upwardly deviated by a predetermined angle or more, for example, slightly below the horizontal line. It can be limited to within, and eventually the drive roller 16 will be able to turn the tire in a position in place.

On the other hand, the present invention provides a side driving method in contact with the side in addition to the front driving method for driving while contacting the front surface of the rear tire 110 with the drive roller (16).

To this end, by adjusting the mounting directions of the mounts 11a and 11b fixed to the seat tube 100 of the bicycle, and adjusting the assembling directions between the mounts 11a and 11b, the driving rollers ( 16 may be modified to contact the side of the rear tire 110.

For example, on the seat tube 100, the whole mounts 11a and 11b which were turned toward the front side of the tire were rotated 90 ° sideways, and then the motor support 10 was left with one mount 11a intact. By assembling the attached mount 11b by rotating it 180 °, the position of the contact surface of the driving roller 16 can be positioned toward the side of the rear tire 110, so that not only the front of the tire but also the side can be driven. .

Therefore, looking at the state of use of the auxiliary drive device is configured as follows.

3 and 4 are side views showing a non-operational / operating state of the auxiliary drive device for a bicycle according to an embodiment of the present invention.

As shown in FIG. 3, the non-operating state of the auxiliary driving device, that is, the state in which the pedal is rotated by the pedaling force as in a normal bicycle is shown.

At this time, the driving roller 16 is free to rotate together with the tire in a state in contact with the front surface of the rear tire 110 by the force of the spring 17, the driving roller 16 is rotated in this way only one direction The one-way bearing intended to transmit has no effect on tire rotation.

As shown in FIG. 4, an operation state of the auxiliary driving device, that is, a state in which the rear tire 110 is driven by driving force of the driving motor 13 is shown.

That is, when a bicycle occupant applies power to the drive motor 13 by steering wheel switch operation in a situation such as hill driving, the driving force is driven with the operation of the drive motor 13 and the driving pulley 14c → belt 14e → driven The driving roller 16 starts to rotate while leading to the pulley 14d → drive shaft 22 and the driving roller 16. At the same time, the driving roller 16 is pulled upward while being in close contact with the tire side. The tire can be returned.

At this time, the driving motor 13, the reduction device 14 and the entire driving roller 16, which are turned upside down while being rotated upward, are restricted from the proper line by the locking device 18, and thus the driving motor 13, the reduction The tire drive by the drive roller 16 is continuously performed while the apparatus 14 and the drive roller 16 as a whole are stably fixed.

Therefore, even in adverse conditions of driving conditions such as hills, not only the general public, but also the elderly, the elderly, women, children, such as disadvantaged physical conditions can be convenient to drive.

If the user cuts off the power of the drive motor 13 by operating a separate switch in a situation where the use of an auxiliary drive device such as a flat surface is unnecessary, at the same time, the forced rotation of the drive roller 16 is also stopped, and the drive that has been flipped upwards. The roller 16 moves downward by the force pushing down the tire and returns to the initial position, and rotates freely in the state as shown in FIG.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The technical idea of this invention and the following by those of ordinary skill in the art to which this invention belongs. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is an exploded perspective view showing an auxiliary driving device for a bicycle according to an embodiment of the present invention

Figure 2 is a perspective view showing a secondary drive device for bicycles according to an embodiment of the present invention

Figure 3 is a side view showing a non-operational state of the auxiliary drive device for a bicycle according to an embodiment of the present invention

Figure 4 is a side view showing the operating state of the auxiliary drive device for a bicycle according to an embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

10: motor support 11a, 11b: mount

12a, 12b: ring 13: drive motor

14: reduction device 14a: supporter

14b: body portion 14c: drive pulley

14d: driven pulley 14e: belt

15 one-way bearing 16 drive roller

17: spring 18: lock device

19: stopper 20: locking pin

21: resin bearing 22: drive shaft

Claims (5)

Mounts (11a) and (11b) fixed to the seat tube (100) of the bicycle and having motor support portions (10) on both sides to which the motor body can be fitted; A drive motor 13 inserted into the motor support 10 of the mounts 11a and 11b and rotatably installed without being pulled out by the rings 12a and 12b coupled to both ends of the motor body; A deceleration device 14, one of which is fixed to the ring 12b in the drive motor 13, which is rotatable together, and which decelerates the motor side power by using pulleys and belt transmission, and then transmits it to the drive roller side; A driving roller (16) having a one-way bearing (15) and installed in a rotatable structure on the other side of the reduction device (14) and in contact with the rear wheel tire (110) to drive the tire; A spring 17 which is fixed to the mount 11b while the other is fixed to a ring 12a in the drive motor 13 so that the driving roller 16 is always in contact with the rear tire 110; A lock device 18 for restraining upward drift of the driving roller 16 including the driving motor 13 and the speed reduction device 14 at a predetermined angle or more during driving; Auxiliary drive device for a bicycle comprising a. The method of claim 1, wherein the lock device 18 is composed of a stopper 19 formed on the side of the mount (11b) and the engaging pin 20 protruding on one surface of the body portion of the reduction device 14, When the locking pin is caught on the stopper during the upper rotation, the upper drive of the reduction device is limited to a certain angle can be limited. The auxiliary driving device for a bicycle according to claim 1, wherein the tire contact end surface of the driving roller (16) has a flat surface capable of point contact so as to minimize contact load. The resin bearing 21 of claim 1, wherein a resin bearing 21 is interposed between the motor support 10 of the mounts 11a and 11b and the motor body of the driving motor 13 to prevent damage to the motor body during rotation. Bicycle auxiliary drive. 2. The body portion 14b of claim 1, wherein the speed reduction device 14 is formed of two plates which are combined side by side while being spaced by a plurality of supporters 14a, and one side of the body portion 14b. A drive pulley 14c which is located inside and is coupled to the shaft of the drive motor 13 and is coupled to an axis of the drive roller 13 while being located inside the other side of the body portion 14b and is connected to the drive pulley 14c. Compared with a driven pulley (14d) having a relatively large diameter and a belt (14e) is caught between the drive pulley (14c) and the driven pulley (14d) comprising a secondary drive device for a bicycle.

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