KR101972821B1 - The rubbing drive unit for bicycle - Google Patents

Abstract

The present invention relates to a friction driving apparatus for a bicycle. An object of the present invention is to provide a friction driving apparatus for a bicycle, which allows a friction driving unit driving a rear wheel to be joint-operated about a main body unit, thereby being possible to drive the wheel by the friction driving unit regardless of impact, vibration and a wheel size. The present invention has: a main body unit coupled to a seat post or a seat tube of a bicycle by a coupling unit of a quick release manner; a friction driving unit rotating a back wheel through friction driving and capable of rotatable on the main bdoy unit; and a pressurizing damping unit connected and installed between the fiction driving unit and the main body unit, thereby allowing the friction driving unit to perform joint motion with repect to the main body unit while maintaining a state of bringing a friction driving roller of the friction driving unit in contact with the back with in certain pressure.

Description

[0001] The present invention relates to a rubbing drive unit for bicycle,

The present invention relates to a friction drive apparatus for a bicycle, and more particularly, to a friction drive apparatus for a bicycle, which is capable of replacing a battery and performing a joint operation with respect to a body portion, ≪ / RTI >

BACKGROUND ART [0002] Generally, a bicycle is a device that allows a person to drive a pedal by driving the pedal. When the occupant steps on the pedal to rotate the front sprocket, the rotational force is transmitted to the rear gear portion by the chain, .

These bikes do not have a big difficulty in short-distance driving on the flat ground, but when they climb a long-distance driving or ramp, it takes a lot of power, so the physical limit is felt. Particularly, when people with different physical strengths ride the bicycle together, there is a problem that it is difficult to carry the vehicle by the difference of the physical strength.

In order to solve such a problem, an electric bicycle has been developed which can be driven by the driving force of the electric motor in parallel with the pedaling of the occupant. However, the electric bicycle has a structure in which the motor and the engine are integrally mounted on the bicycle And an image of an electric two-wheeled vehicle is provided not an image of a pure bike due to an excessive weight and an increase in volume, thereby causing a problem that the likelihood of a passenger is remarkably reduced.

Particularly, the conventional electric bicycle can not be applied to the manufactured bicycle, and it is difficult to move and store the bicycle because of its weight and volume, so that there are frequent theft or breakage accidents.

In recent years, in order to solve the problems of general bicycles and electric bicycles, there has been developed a bicycle drive device that drives a rear wheel or a front wheel by operating a drive motor by a battery installed therein. However, So that it is practically impossible to replace the battery. Therefore, there is a problem that the battery can not be used when the battery is consumed or while the battery is being charged.

In addition, in the conventional bicycle drive device, the drive roller of the drive device is brought into close contact with the rear wheel or the front wheel only by assembling with the bicycle frame, and when the air pressure of the front / A gap is generated between the roller and the front / rear wheels, and the driving force is not transmitted.

When the driving device and the rear wheel are kept in close contact with each other simply by assembling, shocks and vibrations generated when the bicycle is traveling are transmitted to the driving device as it is. So that a gap is generated between the driving roller and the front / rear wheels.

Registration Utility Model Registration No. 20-0236241 (Jun. 18, 2001) Patent Registration No. 10-0351316 (Aug. 21, 2002) Patent Registration No. 10-0852892 (2008.08.12) Open Patent Publication No. 2002-0090073 (November 30, 2002)

An object of the present invention is to provide a friction drive device for a bicycle in which a friction drive portion for driving a rear wheel is articulated with respect to a body portion so that a wheel can be driven by a friction drive portion regardless of impact,

It is still another object of the present invention to provide a friction drive device for a bicycle which enables easy replacement of a battery and enables long-time use and long-distance movement.

The present invention is characterized in that a main body portion is coupled to a seat post or a seat view of a bicycle by a quick-fit type coupling portion, and a friction drive portion for rotating the rear wheel by friction drive is rotatably mounted on the main body portion, And the friction drive portion of the friction drive portion is held in contact with the rear wheel at a constant pressure so that the friction drive portion is moved with respect to the body portion.

In the present invention, the friction drive portion for driving the rear wheels is configured to perform joint motion with respect to the body portion, so that not only is it not affected by the shape of the bicycle frame and the size of the wheel, Since the friction drive roller of the driving portion always comes in close contact with the rear wheel at a constant pressure, the driving force is continuously transmitted to the rear wheels without a break phenomenon, and stable running is achieved.

The present invention has a simple structure composed of a coupling portion, a main body portion, a friction drive portion, and a pressurizing buffer portion, thereby facilitating parts management, eliminating the difficulty of disassembling and assembling, and facilitating removal and attachment of the bicycle frame.

In the present invention, the battery is housed in the battery receiving groove in the body portion, and the battery receiving groove is opened or closed by the cover body, so that replacement and installation of the battery can be facilitated only by opening and closing the cover body without further disassembling operation.

The present invention can replace the battery, and can be moved for a long time or a long distance without a separate charging facility.

The present invention is adapted to be mounted on a seat post or a seat tube of a bicycle frame in a quick release manner, so that not only an excellent coupling force but also a general bicycle which is produced and sold can be easily installed by anyone.

The present invention is provided to be positioned at a rear portion of a bicycle saddle, and the simple structural features of the body portion provide a visual effect of the rear bicycle saddle as a whole, thereby preventing the overall shape of the bicycle from being deteriorated.

According to the present invention, the coupling portion and the pressure buffering portion are respectively coupled to the main body base of the main body, and the cover main body is coupled to the main body base, so that the connecting portion between the respective parts is not exposed to the outside.

The present invention is configured to be assembled by a bolt / nut and a fitting method without a welding operation, thereby minimizing manufacturing cost and providing excellent durability.

Since the bicycle is easily detached and attached to the bicycle, the bicycle can be separated from the bicycle and transported and transported, thereby preventing a stolen accident from occurring.

The present invention is provided with a rear end support plate which can be integrally provided at the rear end of the main body unit with a tail lamp or a direction, so that there is an effect that a safe driving of the bicycle can be achieved.

The present invention has many effects such as reducing the burden of installation cost for obtaining auxiliary power and providing environment friendliness because there is no fear of noise and smoke generation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 2 is a view showing an example of a configuration according to the present invention
FIG. 3 is an illustration showing an exploded configuration of FIG. 2;
Figure 4 is another example showing the arrangement according to the present invention.
Figure 5 is an illustration of an exploded configuration of Figure 4;
6 is an exemplary view showing a configuration of a main body base according to the present invention
7 is an exemplary view showing a configuration of a friction drive unit according to the present invention.
FIG. 8 is a view showing an example of a joint motion state of the present invention

2 is an exemplary diagram showing a configuration according to the present invention, FIG. 3 is an exemplary view showing an exploded configuration of FIG. 2, FIG. 4 is a configuration according to the present invention Fig. 5 is a view showing an exploded configuration of Fig. 4, Fig. 6 is an illustration showing a configuration of a main body base according to the present invention, Fig. 7 is a view showing a configuration of a friction drive part according to the present invention FIG. 8 is a view showing an example of a joint motion state of the present invention,

The present invention is characterized in that a main body portion is coupled to a seat post or a seat view of a bicycle by a quick-fit type coupling portion, and a friction drive portion for rotating the rear wheel by friction drive is rotatably mounted on the main body portion, And the friction drive portion of the friction drive portion is held in contact with the rear wheel at a constant pressure so that the friction drive portion is moved with respect to the body portion.

That is, the present invention may be applied to a seat post 241 of a bicycle 200 or a coupling portion 10 connected to an upper end of a seat tube 211;

A body portion 20 integrally coupled to the coupling portion 10 at one end thereof and accommodating the battery 50 therein;

A friction drive part 30 coupled to the other end of the main body part 20 such that the upper end thereof is rotatable and the friction drive roller 33 positioned at the lower end thereof contacts the rear wheel 230;

And a pressurization buffer 40 connected to the main body 20 such that the upper end thereof is rotatable and the lower end thereof is rotatably connected to the lower end of the friction drive unit 30 so as to press the friction drive roller 33 in the direction of the rear wheel ,

The friction drive unit 30 is installed downward in the main body 20 so that the friction drive roller 33 is located in the direction of the seat tube 211. Even when shock and vibration are generated due to the running of the bicycle, So that the driving force generated in the rear wheel 30 is constantly transmitted to the rear wheel 230.

The frame 210 of the bicycle typically includes a seat tube 211, a top tube 212, a down tube 213, a seat stay 214, a head tube 215, A frame having a structure in which the seat stay 214 or the top tube 212 is absent is used as the case may be.

1, the coupling portion 10 is fixed to the upper end of the seat post 241 of the bicycle or the upper end of the seat tube 211 so as to be positioned at the lower end of the saddle 240 of the bicycle.

As shown in FIGS. 2 to 5, the coupling unit 10 includes a fixing table 11 fixed to the seat post 241 or the seat tube 211 by a quick release mechanism, And a support 12 formed to be coupled to the main body 20.

3 and 5, the main body unit 20 includes a main body base 21 having one side connected to the coupling unit 10 and having a battery receiving groove therein, And a cover frame 23 connected to the main body base to prevent external exposure of the battery receiving recess.

As shown in FIG. 6, the main body base 21 includes a first support frame 24 having an engagement groove 28 therein, a first support frame 24 spaced apart from the first support frame 24 by a predetermined distance, A third support frame 26 connecting the first and second support frames 24 and 25 and a third support frame 26 connecting the first, second and third support frames 24 and 25, And a battery receiving groove 27 formed between the first support frame 24 and the second support frame 22 so as to have a groove opened upward by the first and second support frames 25 and 26.

The first and second support frames 24 and 25 are integrally coupled to each other by bolts / nuts or the like through which the supports 12 of the coupling portions are inserted into the respective coupling grooves 28.

The first and second support frames 24 and 25 include outer panels 24a and 25a and inner panels 24b and 24b spaced apart from the outer panels 24a and 25a and connected to the third support frame 26 And upper and lower panels 24a and 25b and upper and lower panels 24a and 25b and upper and lower panels 24a and 25a and upper and lower inner panels 24b and 25b to integrally connect the upper ends of the outer panels 24a and 25a and the inner panels 24b and 25b, And an engaging groove 28 formed by the upper panels 24c and 25c and into which the supporter 12 of the engaging portion is inserted.

The third support frame 26 is formed in a plate shape so that both sides are integrally connected to the lower ends of the first support frame 24 and the second support frame 25, that is, the lower ends of the inner panels 24b and 25b And the battery receiving groove 27 is formed between the first and second support frames 24 and 25.

The battery accommodating groove 27 is provided at a position where the battery 50 for supplying power to the friction driving unit 30 is seated. The battery accommodating groove 27 includes first, second, and third support frames 24, 25, 26, And has a shape of a predetermined height and an open top by the coupling portion 10 to be coupled and the rear end support plate 22 to be coupled to the rear end of the main body base.

Further, a separate support means (not shown) for supporting the position of the battery 50 may be further provided in the battery accommodating groove 27. Since a known support means is used, The description is omitted.

A control panel (not shown) for controlling the friction driving portion 30 may be further provided in the battery receiving groove 27 according to the operation of the user's control lever 60. In addition, the control panel may have a conventional function of checking the remaining amount information of the battery and notifying the occupant by wire / wireless. The control lever 60 is connected to the handle of the bicycle and can be installed to facilitate the user's operation.

The main body base 21 constructed as described above can be formed by bending and cutting of an iron plate. That is, the first support frame 24, the third support frame 26, and the second support frame 25 may be continuously formed by bending and cutting one steel plate.

The rear end support plate 22 is fixed to the main body base by fixing means such as a bolt to prevent foreign matter from being inserted into the battery receiving groove 27. The rear end support plate 22 is provided with a direction light or a tail light 60, As shown in FIG.

The cover frame 23 may include a sliding type cover frame 23a, a rotating type cover frame, and a composite type cover frame 23b.

The slide type cover frame 23a is slidably inserted into the main body base 21 to open and close the battery receiving groove 27. As shown in Figures 2 and 3, A cover body 231a formed in an inverted U shape such that the battery receiving groove 27 is closed and a cover body 231b protruding from the lower end of the cover body 231a to contact and support the first and second support frame lower ends 24d, And a plurality of guide protrusions 232a.

The slide type cover frame 23a thus formed is supported by the upper end inner side surface 233a of the cover body in contact with the upper panels 24c and 25c of the first and second support frames and the guide projections 232a are supported by the first and second And is slidably engaged with the main body base 21 while being held in contact with the lower ends 24d and 25d of the support frame.

The rotation type cover frame may be configured such that one end of the cover body is hinged to the main body base to open and close the battery receiving groove by rotation. Such a rotation method is well known in the art, The drawings are omitted.

As shown in FIGS. 4 and 5, the composite type cover frame 23b includes a guide frame 233b slidably coupled along the first and second support frames 24 and 25 of the main body base, The guide frame 233b is slidably engaged with the main body base 21 so as to include the cover main body 231b which is hingedly coupled to the battery housing groove 233b 27 may be opened or closed.

The guide frame 233b is supported and supported by a plurality of guide protrusions 232a which are held in contact with the first and second support frame lower ends 24d and 25d and the upper panels 24c and 25c of the first and second support frames And a top support 234b to which one side of the cover frame 231b is fitted.

One end of the cover body 231b is hinged to the guide frame 233b and the other end of the cover body 231b is connected to the upper end of the guide frame 234b .

In the composite type cover frame 23b constructed as described above, the guide frame 233b is engaged with the first and second support frames 24 and 25 of the main body base by the upper support band 234b and the guide protrusion 232b of the guide frame, And the battery receiving groove 27 is opened and closed by the cover main body 231b.

The cover frame 23 has a function of not only opening and closing the battery receiving groove 27 but also a function of connecting the main body base 21 of the main body portion 20 and the engaging portion 10, The engaging portions of the main body 20, the engaging portion 10 and the friction driving portion 30 are easily formed while the engaging portions of the main body base 21 and the friction driving portion 30 are not exposed to the outside, And the like.

As shown in FIG. 7, the friction drive unit 30 includes first and second drive frames 31 and 32 rotatably connected to the main body 20, and first and second drive frames 31 and 32, A friction drive roller 33 connected to the lower ends of the frames 31 and 32 and rotationally driven by a drive motor; a first drive frame 31 and a second drive frame 32 positioned on the upper side of the friction drive roller 33; As shown in FIG. 8, is provided so as to be inclined downward from the main body 20, that is, to have a predetermined inclination angle with the main body portion. At this time, the body portion and the friction driving portion are installed to have an acute angle?.

The first and second driving frames 31 and 32 are formed by hinging the upper ends 31a and 32a to the main body 20 and lowering the lower ends 31b and 32b toward the seat tube 211 of the bicycle frame The first and second driving frames 31 and 32 are installed at an acute angle? With respect to the main body 20.

The friction drive roller 33 is brought into close contact with the rear wheel 230 of the bicycle to drive the rear wheel 230 by frictional force. At this time, the friction drive roller 33 may have a contact surface 33a having a predetermined curvature so as to be brought into close contact with the outer surface of the rear wheel to improve the contact force with the rear wheel.

In addition, the friction drive roller 33 may be configured such that a plurality of grooves are formed (knurled) on the contact surface 33a in a lateral or inclined manner to prevent a slip phenomenon between the friction drive roller and the rear wheel and to keep the frictional force constant.

The driving motor is fixed to the lower ends 31b and 32b of the first and second driving frames. The driving shaft of the driving motor is connected to the friction driving roller 33, So that the friction drive roller 33 is rotatably operated. Preferably, as shown in the drawings of the present invention, the drive motor is built in the friction drive roller.

Since the drive motor is built in the friction drive roller and the friction drive roller is driven to rotate, a detailed description thereof will be omitted.

The foreign matter prevention plate 34 serves to prevent foreign matters from adhering to the friction drive roller 33 and to prevent foreign substances from being trapped between the friction drive roller 33 and the rear wheel, And are integrally connected to the first and second drive frames 31 and 32.

3 and 5, the upper end 41 is connected to one side of the main body 20 so as to be rotatable, and the lower end 42 is connected to the friction driving part so as to be rotatable So that the frictional driving roller 33 is urged against the rear wheel 230 by a predetermined pressure.

For example, the pressurization buffering portion 40 is provided such that the upper end 41 is inserted into the engaging groove of the main body portion and is rotatably installed on the main body base, and the lower end 42 is provided on the first support frame or the second support frame And can be installed to be rotatable.

The upper end 41 of the pressing buffer 40 is rotatably mounted on the rear end supporting plate of the main body and the lower end 42 of the pressing buffer 40 is connected to the first supporting frame 31 or the second supporting frame 32 Can be rotatably installed on the foreign matter prevention plate (34).

For example, a shock absorber or a damper may be used as the pressure shock absorber 40, and one or two pressure shock absorbers may be provided.

The friction drive roller 33 of the friction drive portion is brought into close contact with the rear wheel 230 and the friction drive roller 33 is brought into close contact with the rear wheel 230 by the pressure buffering portion 40, The friction drive unit 30 is jointly operated around the hinge 70 connected to the main body 20 in a state where the friction drive roller 33 and the rear wheel The contact state of the contact portion 230 is kept constant. That is, the driving force of the driving motor is constantly transmitted to the rear wheel through the friction drive roller, so that the rear wheel is rotationally driven.

Further, the present invention is preferably installed to drive the rear wheels, but it may be installed to drive the front wheels or the front / rear wheels as required.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): Coupling portion (11): Fixture
(12): Support base (20): Main body
(21): main body base (22): rear end supporting plate
(23): cover frame (23a): slide type cover frame
(231a): Cover body (232a): Guide protrusion
(23b): a composite type cover frame (231b): a cover body
(232b): guide protrusion (233b): guide frame
(234b): upper support frame (24): first support frame
(25): second support frame (24a, 25a): outer panel
(24b, 25b): inner panel (24c, 25c): upper panel
(24d, 25d): lower end (26): third supporting frame
(27): battery receiving groove (28): engaging groove
(30): Friction drive part (31): First drive frame
(32): second driving frame (31a, 32a): upper
(31b, 32b): lower end (33): friction drive roller
(33a): contact surface (34): foreign matter prevention plate
(40): Pressurizing buffer (50): Battery
(60): a directional light or a taillight (70): a hinge
(100): friction drive device (200): bicycle
(210): bicycle frame (211): seat tube
(212): top tube (220): front wheel
(230): rear wheel (240): saddle
(241): Seatpost

Claims (8)

A coupling portion 10 connected to the seat post 241 of the bicycle 200 or the upper end of the seat tube 211;
A body portion 20 integrally coupled to the coupling portion 10 at one end thereof and accommodating the battery 50 therein;
A friction drive part 30 coupled to the other end of the main body part 20 such that the upper end thereof is rotatable and the friction drive roller 33 positioned at the lower end thereof contacts the rear wheel 230;
And a pressurization buffer 40 connected to the main body 20 such that the upper end thereof is rotatable and the lower end thereof is rotatably connected to the lower end of the friction drive unit 30 so as to press the friction drive roller 33 in the direction of the rear wheel ,
The engaging portion 10 includes a fixing table 11 fixed to the upper end of the seat post 241 or the seat tube 211 by a quick release mechanism and a fixing plate 11 integrally formed with the fixing table 11, (12) which is coupled to the support (12)
The body portion 20 includes a main body base 21 having one side connected to the coupling portion 10 and having a battery receiving groove therein, a rear supporting plate 22 connected to the other side of the main body base, And a cover frame (23) connected to the main body base so as to prevent external exposure of the groove,
The friction drive unit 30 is installed downward in the main body 20 so that the friction drive roller 33 is positioned in the direction of the seat tube 211. Even when shock and vibration are generated due to traveling of the bicycle, (30) is transmitted to the rear wheel (230) constantly.
The method of claim 1,
Wherein the body portion and the friction drive portion are provided so as to have an acute angle &thetas;.
delete The method of claim 1,
The main body base 21 includes a first support frame 24 having an engagement groove 28 therein and a second support frame 24 spaced a predetermined distance from the first support frame 24 and having an engagement groove 28 therein. 2 supporting frame 25, a third supporting frame 26 connecting the first and second supporting frames 24 and 25, and a third supporting frame 26 connecting the first and second supporting frames 24, And a battery receiving groove (27) formed between the first support frame (24) and the second support frame (22) so as to have a groove formed therein.
The method of claim 4,
The first and second support frames 24 and 25 include outer panels 24a and 25a and inner panels 24b and 25b spaced apart from the outer panels 24a and 25a and connected to the third support frame 26, And upper panels 24c and 25c for integrally connecting the upper ends of the outer panels 24a and 25a and the upper ends of the inner panels 24b and 25b and the upper and lower outer panels 24a and 25a and the inner panels 24b and 25b, And the engagement groove (28) formed by the panels (24c, 25c) and into which the support base (12) of the engagement portion is inserted.
The method of claim 1,
The cover frame 23 is composed of a sliding type cover frame 23a,
The slide type cover frame 23a includes a cover body 231a formed in an inverted U shape so as to close the battery receiving groove 27 with an open upper portion and a cover body 231b protruding from the lower end of the cover body 231a, And a plurality of guide protrusions 232a which are in contact with and supported by the lower support frames 24d and 25d,
The upper inner side surface 233a of the cover body is held in contact with the upper panels 24c and 25c of the first and second support frames and the guide protrusion 232a contacts the lower ends 24d and 25d of the first and second support frames And is slidably coupled to the main body base (21) while being supported.
The method of claim 1,
The cover frame 23 is composed of a composite type cover frame 23b,
The composite type cover frame 23b includes a guide frame 233b which is slidably coupled along the first and second support frames 24 and 25 of the main body base and a cover body 233b which is hingedly coupled to the guide frame 233b, And the battery housing groove 27 is opened or closed by rotation of the cover frame 231b after the guide frame 233b is slidably engaged with the main body base 21 Friction drives for bicycles.
The method of claim 1,
The friction drive unit 30 includes first and second drive frames 31 and 32 coupled to the main body 20 such that the upper end of the first drive frame 31 and the second drive frames 31 and 32 can rotate, A friction drive roller 33 connected to the friction drive roller 33 and driven to rotate by a drive motor and a foreign matter prevention plate connected to the first and second drive frames 31 and 32 so as to be positioned on the upper side of the friction drive roller 33 34)
The first and second driving frames 31 and 32 are configured such that the upper ends 31a and 32a are hinged to the main body 20 and the lower ends 31b and 32b are oriented toward the seat tube 211 of the bicycle frame. (?), and is provided so as to be inclined downward.

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