JPH09207861A - Motor-driven bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring the weight of a motor-driven bicycle close to the weight of an ordinary bicycle so that women and children can handle it easily by providing an arm member for holding driving roller of which one end is rotatably supported and the other end is rotatably attached on a support member of the bicycle at a more wheel side position than a rotary shaft of a motor. SOLUTION: A driving roller 17 is mounted on a rotary shaft 16 of a motor 10, and a mounting shaft member for arm member is provided on a top face 18 of the motor 10. The mounting shaft member for arm member is provided more close to a tire 9 side than the rotary shaft 16 of the motor 10. A mounting end part on one side of an arm member for fixing position of the driving roller is attached on the mounting shaft member for arm member in such a manner that it can turn, and the other end part of the arm member for fixing position of the driving roller is attached on a mounting shaft of a mounting tool 24 provided on a beam member 15 in such a manner that it can turn. The driving roller 17 is pressed against the tire 9 due to deflection of the arm member for fixing position of the driving roller, and the rotation of the motor 10 is transmitted to the tire 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric bicycle equipped with a motor, that is, an electric bicycle, and more particularly to an electric bicycle equipped with a motor as a power source or an auxiliary power source. The present invention also relates to an electric bicycle including a human-powered drive system and a motorized drive system.

[0002]

2. Description of the Related Art For example, in an electric bicycle, a motor is arranged behind or above a crankshaft, and a power storage source for the motor is provided, for example, between a seat tube and a rear wheel to rotate a rotating shaft of the motor. Is transmitted to the chain ring or the chain via the power transmission device, and the rotation of the motor is assisted to drive the bicycle to facilitate rowing of the bicycle when climbing a hill or the like.

[0003]

However, the conventional electric bicycle is equipped with a motor, a power storage device for the power source of the motor, a power transmission device and a drive control device, and becomes heavy as a whole and close to a motorcycle. In addition, the weight of the bicycle is much heavier than that of ordinary bicycles, making it difficult for girls and children to handle. The present invention has an object to solve a problem that a conventional electric bicycle is formed to be heavier than a general bicycle and is difficult for a girl or a child to handle.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric bicycle which has a weight close to that of a general bicycle and is easy for girls and children to handle. That is, in the present invention, in an electric bicycle equipped with a motor as a power source, a motor holding member fixed to a rotation shaft of a bicycle wheel together with a lower end portion of a support member of the bicycle, and a rotation shaft of the motor directly or A driving roller, which is indirectly connected via a power transmission device and is provided so as to be able to contact a part of the wheel, and one end of which is rotatable at a position closer to the wheel than the rotation shaft of the motor. An electric bicycle, comprising: an arm member for supporting a driving roller, which is supported and is rotatably attached to a support member of the bicycle. The present invention also relates to a power vehicle. In an electric bicycle equipped with a motor as a power source, a motor holding member, which is fixed to a rotating shaft of a bicycle wheel together with a lower end portion of a column member of the bicycle and holds a mounted motor, is directly or indirectly connected to the motor. A driving roller capable of contacting a part of the wheel of the bicycle, a beam member having a first end connected to the column member of the bicycle, and one end connected to a second end of the beam member. Then
An auxiliary strut member, the other end of which is connected to the rotating shaft of the bicycle wheel together with the lower end of the strut member of the bicycle and a motor holding member, and reciprocally supported on the second end side of the beam member. Driving roller position operating arm member including a rod member and a spring member supported on the second end side, and a driving roller including an attachment shaft member fixed to the first end side of the beam member. The mounting member of the position fixing arm member and one end of the mounting member are rotatably mounted on the mounting shaft member, and the other end of the mounting arm member is rotated on the mounting shaft member located on the wheel side of the rotation shaft on the upper surface of the motor. An electric bicycle comprising: a roller position fixing arm member that is movably attached.

In the electric bicycle of the present invention, the driving roller driven by the motor comes into contact with a part of the wheel such as the tire of the bicycle to transmit the rotation of the motor to the wheel of the bicycle to drive the bicycle in an auxiliary manner. To do. In the electric bicycle of the present invention, the wheels with which the driving roller comes into contact are the front wheels or the rear wheels or the front wheels and the rear wheels.

In the present invention, the motor is fixed to the support member connected to the bicycle wheel via the motor support member. In this case, when the wheel on which the motor is mounted is the front wheel, it is preferable that the motor is mounted on a rotary shaft (hereinafter referred to as the rotary shaft) such as a hub shaft to which the lower end portion on one side of the fork is mounted. It is preferable that the stayy chain is attached to the rotating shaft on the side not hung. The motor is connected via a conductor to a power battery, which is arranged, for example, on the carrier of the bicycle.

The driving roller may be a friction wheel whose contact surface is covered with a friction member or a gear whose contact surface has a tooth profile. When the driving roller is a friction wheel, the contact surface on one circumference of the bicycle wheel, for example, the side surface of the tire, the rim lower edge surface or the side surface of the disc wheel, the contact surface of the driving roller is contacted, The rotation of the motor can be transmitted to the wheels of the bicycle. In this case, a friction surface may be formed especially on the side of the tire, the lower edge of the rim or the side of the disc wheel to avoid wear on the side of the tire, the lower edge of the rim and the side of the disc wheel.

In the present invention, when the driving roller is a friction wheel made of plastic, rubber or the like, it is suitable that the contact surface on one circumference, especially between the side contact surface of the tire and the contact surface of the driving roller. It is preferable because smooth sliding can be obtained and wear of the rotating portion can be reduced. In the case of forming the driving roller into a gear, the side of the tire of the bicycle, the lower edge of the rim or the side of the disc wheel is provided with a gear having a toothed circumference around the rotation axis. The rotation of the motor can be transmitted to the wheel of the bicycle by bringing the gear formed on one circumference of the wheel into contact with the gear of the driving roller.

The motor is provided at a height such that the driving roller, which is directly or indirectly connected to the rotation shaft of the motor, is located at a height where it can contact a part of the bicycle wheel. For example, the connecting portion of the rotating shaft of the driving roller is connected to the connecting portion of the rotating shaft of the motor or the rotating shaft on the power transmitting side of the power transmitting device that is connected to the rotating shaft of the motor (hereinafter referred to as the rotating shaft), The driving roller is brought into contact with the bicycle wheel on one circumference. In this case, a motor holding member having an engaging portion that engages with the rotation shaft is provided at the bottom of the motor, and the motor holding member is connected to the rotation shaft via the motor holding member. When a motor is attached to a rotating shaft via a motor holding member, if a gap occurs between the bottom of the motor and the rotating shaft of the wheel, the motor can be attached to the rotating shaft by filling the gap. It is possible to set the height of the motor holding member provided on the bottom portion of the sheet according to the gap between the gaps.

In the present invention, the motor does not incline to the wheel side when the drive roller is not in contact with a part of the bicycle wheel, but when the drive roller is in contact with a part of the bicycle wheel, the motor is a wheel. Being inclined to the side, the motor holding member is at least partially formed of a material having flexibility or flexibility so that the posture of the motor can be changed. In the present invention, the bottom end of the motor is held on the rotating shaft of the wheel of the bicycle through the holding member. A member is preferably provided and supported via a compression coil spring attached to the beam member.

In the present invention, the motor is provided with an arm member for operating the position of the driving roller so that the driving roller can be pushed and pulled in order to press the driving roller on one circumference of the wheel. Has been. The arm member for operating the position of the driving roller is, for example, a rod member made of a steel rod or wire and extending to the handlebar so that the driving roller can be pushed or pulled by operating the handle, The spring member is supported by the beam member and acts so as to constantly push the driving roller toward the wheel of the bicycle.

The spring member of the position operating arm member of the driving roller is, for example, a compression coil spring. The compression coil spring is
The one end is attached to the beam member, and the other end is
It is attached to the attachment member at the end of the rod member. The rod member of the arm member for operating the position of the driving roller is inserted through the spiral hollow portion of the compression coil spring, and the attachment member at the end portion is a motor, for example, an arm member such as a bolt erected on the upper surface of the motor. It is attached to the attachment member.

Further, in the present invention, when the motor is pushed by the position operating arm member of the driving roller to bring the driving roller into contact with the wheel once, the contact between the wheel and the driving roller is automatically maintained and continued. Thus, the driving roller position fixing arm member is provided. In the present invention, once the driving roller is brought into contact with the wheel, the contact between the wheel and the driving roller is maintained by the action of the driving roller position fixing arm member, but this contact is caused by the driving roller position operating arm member.
It is continued unless the driving roller is separated from the wheel. Therefore, in the present invention, the driving roller position operating arm member is pushed out from the beam member side to the wheel side to bring the driving roller into contact with a part of the wheel, and the driving roller position operation member is moved from the wheel side to the beam member side. The drive roller can be separated from the wheel by pulling it back to.

In the present invention, the motor is provided with a mounting member for rotatably mounting the position fixing arm member and the position operating arm member of the driving roller. The position of the attachment provided on the motor is preferably a position where the operation of inclining the driving roller to the wheel side to bring it into contact with the wheel or pulling it back to separate it from the wheel is easy.
The fixture for mounting the arm member for fixing the position of the driving roller is
The mounting member, which is provided on the wheel side of the rotation shaft of the motor and for mounting the arm member for operating the position of the driving roller, is an arm for fixing the position of the driving roller with the line connecting the rotation shaft of the motor and the wheel as a boundary. It is preferably provided on the side opposite to the member.
Therefore, the main body of the motor is supported by the driving roller position fixing arm member and the driving roller position operating arm member so as not to rotate about the rotation axis. One end of the position fixing arm member of the driving roller is rotatably attached to the motor, for example, the upper surface of the motor, and the other end is rotatably attached to the beam member. One of the arm members for operating the position of the driving roller is rotatably attached to the motor, for example, the upper surface of the motor, and the other is provided to extend to the handlebar via the beam member. The position at which the arm member for fixing the position of the driving roller and the position operation is mounted on the motor is preferably the upper surface of the motor because the mounting operation can be simplified, and the mounting tool is formed by providing bolts or the like. .

In the present invention, the driving roller is pushed by the driving roller position operating arm member and contacts a part of the wheel, but when the rotating driving roller contacts a part of the wheel, the driving roller moves to the wheel. Kick to rotate the wheel and move forward slightly by the reaction. Therefore, the position fixing arm member of the driving roller swings in the forward direction about the fixture of the beam member, and the angle between the position fixing arm member of the driving roller and the surface perpendicular to the contact surface of the wheel is increased. Becomes smaller and acts to push the drive roller towards the wheels. The runout caused by the forward movement of the end portion of the position fixing arm member of the driving roller extends the spring of the driving roller position operating arm member, and stops in balance with the extension of the spring. Therefore, the position fixing and position operating arm members of the driving roller cooperate with each other to maintain the contact between the driving roller and the wheel and continue to transmit the rotation of the motor to the wheel of the bicycle.

According to the present invention, a motor is attached to a rotating shaft of a bicycle wheel via a motor holding member, and a position operating arm member of the driving roller is pushed to incline the motor toward the wheel to thereby move the driving roller. By contacting the contact surface of the bicycle wheel on the circumference of one circle and transmitting the rotation of the driving roller rotated by the motor to the wheel, the bicycle wheel can be rotated to drive the bicycle. In the electric bicycle of the present invention, the motor is fixed to the rotating shaft of the wheel portion, and the rotation of the motor is directly transmitted to the wheel by the driving roller.
The power transmission mechanism can be simplified.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the electric bicycle of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the following description and examples. 1 is a schematic side sectional view of a front wheel portion of an embodiment of an electric bicycle of the present invention, and FIG. 2 is a front wheel portion of the embodiment shown in FIG. 1 in which a driving roller is separated from a tire. FIG. 4 is a schematic front cross-sectional view showing a state in which a part of the state is partially cut out, and FIG. 3 shows a state in which a driving roller contacts a tire in a front wheel portion of the embodiment shown in FIG. FIG. 3 is a schematic front cross-sectional view with a cutout partly showing the outline thereof. FIG. 4 is a schematic plan sectional view showing a state in which the driving roller is separated from the tire in the front wheel portion of the embodiment shown in FIG. FIG. 2 is a schematic plan sectional view showing a state in which a driving roller contacts a tire in the front wheel portion of the embodiment shown in FIG. For convenience of description, covers and accessories that do not require description are omitted and not shown.

[0018]

1 to 5, a hub shaft 3 to which a hub 2 of a front wheel portion 1 of an electric bicycle is attached.
The lower end portion of the fork 5 is fitted into the bolt 4 and is attached by the nut 6. The plurality of spoke wires 8 attached to the rim 7 are fixed to the peripheral portion of the hub 2, and the tire 9 is attached to the rim 7. In this example, a mounting portion 12 of a motor support 11 that fixedly supports the motor 10 is fixed to the hub shaft 3. In this example, the part 13 of the motor support 11 is made of a rubber material, and can hold the motor 10 in an inclined state. A grip 14 is attached to the upper portion of the fork 5, and a beam member 15 is fixed to the grip 14 by a screw.

In this example, a driving roller 17 is attached to the rotary shaft 16 of the motor 10, and arm member attaching shaft members 19 and 20 are provided on the upper surface 18 of the motor 10. The arm member mounting shaft member 19 is used for the motor 10
Is provided closer to the tire 9 side than the rotating shaft 16 of the above, and one mounting end portion 22 of a position fixing arm member 21 of the driving roller is rotatably attached to the arm member mounting shaft member 19. The other end 23 of the arm member 21 for fixing the position of the driving roller is attached to the beam member 15.
It is rotatably attached to the attachment shaft 25 of No. 4.

Mounting shaft member 2 for the arm member of the motor 10
0, a mounting member 27 of the driving roller position operating arm member 26 is rotatably mounted, and one end of a rod member 28 of the driving roller position operating arm member 26 is attached to the mounting member 27. It is fixed. In this example, the rod member 28 is reciprocally inserted through a sheath member 29 fixed to the beam member 15, and one end is supported by the beam member 15 and the other end is supported by the mounting member 27. It extends through a handlebar (not shown) through the coiled hollow portion of the spring 30. The outer end portion 31 of the beam member 15 has a bottom 32 fixed to the hub axle 2 by a cargo bed 32.
Is fixed to a support rod 33 that supports the.

Since this embodiment is constructed as described above, while the bicycle is being rowed, the lever connected to the bar member 28 extending between the handlebars is pushed to drive the motor 10
Drive roller 1 with a switch (not shown)
At the same time as rotating 7 in the direction of arrow 35, the bar member 28 is projected in the direction of the tire 9. The protrusion of the rod member 28 pushes the upper portion of the motor 10 toward the tire 9 to incline (see FIG. 3), and the driving roller 17 connected to the rotating shaft 16 of the motor 10 contacts the side surface of the tire 9. When the driving roller 17 comes into contact with the tire 9, the tire 9 is further rotated by the driving roller 17, and the bicycle moves forward even if the person riding the bicycle stops pedaling the pedal (not shown).

When the driving roller 17 comes into contact with the tire 9,
When the tire 9 comes into contact with the driving roller 17, the rotation of the driving roller 17 is transmitted and the movement in the direction of the arrow 36 is accelerated. On the other hand, the rotation of the driving roller 17 is caused by the tire 9
The driving roller 17 is advanced in the direction opposite to the rotation direction 36 of (see FIG. 5). When the driving roller 17 advances in the direction opposite to the rotation direction 36 of the tire 9, the position fixing arm member 21 of the driving roller swings to the right in FIG. 5 about the mounting shaft 25 of the mounting tool 24 of the beam member 15. The driving roller 17 is made to bite into the tire 9.

In this example, the driving roller 17 is moved by the swing of the position fixing arm member 21 of the driving roller.
Is pressed against the tire 9, so that the rotation of the motor 10 is transmitted to the tire 9 via the driving roller 17. Once the driving roller 17 is pressed against the tire 9 and the mounting end portion 22 of the position fixing arm member of the driving roller advances in the direction opposite to the rotation direction 36 of the tire 9, the position operating arm member of the driving roller is moved. The spring 30 of 26 will extend. Even if the spring 30 extends in this manner, the motor 1
The push of 0 continues even if it becomes weak. This spring 3
The action of 0 restricts the swing of the position fixing arm member 21 of the driving roller, and the contact between the driving roller 17 and the tire 9 is kept constant and cannot be separated.

Therefore, unless the lever of the handlebar is pulled up to pull back the rod member 28, the driving roller 1
The contact between 7 and the wheel is maintained, and the rotation of the wheel by the driving roller is continued. Brake 3 when stopping the bicycle
The bicycle is stopped by pulling the lever 7 to apply the brake and at the same time turn off the switch of the motor 10. A change in torque during this process can be detected by a sensor (not shown), and the motor 10 can be automatically switched off and stopped.

[0025]

According to the present invention, a motor is attached to a rotating shaft of a bicycle wheel via a motor holding member, a driving roller connected to the rotating shaft of the motor is provided, and an arm member for operating the position of the driving roller is pushed. , By inclining the motor to the wheel side, the driving roller is brought into contact with the contact surface on one circumference of the bicycle wheel, and the rotation of the driving roller rotated by the motor is transmitted to the wheel. The power transmission mechanism can be simplified compared to a bicycle. Further, according to the present invention, since the rotation of the motor is directly transmitted to the wheels of the bicycle, the transmission mechanism for transmitting the power from the motor power by the chain or the like can be omitted as compared with the conventional electric bicycle, and the size of the electric bicycle can be increased. It is possible to provide an electric bicycle that can be avoided and can be handled without exerting a large force, and can be easily handled by children and women.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of a front wheel portion of an electric bicycle according to an embodiment of the present invention.

FIG. 2 is a schematic front sectional view showing a state in which a driving roller is separated from a tire in the front wheel portion of the embodiment shown in FIG.

FIG. 3 is a schematic front sectional view of the front wheel portion of the embodiment shown in FIG. 1, in which a state in which a driving roller contacts a tire is partially cut away to schematically show a part thereof.

FIG. 4 is a schematic plan cross-sectional view showing a state in which a driving roller is separated from a tire in the front wheel portion of the embodiment shown in FIG.

FIG. 5 is a schematic plan cross-sectional view showing a state in which the driving roller contacts the tire in the front wheel portion of the embodiment shown in FIG.

[Explanation of symbols]

 1 Front Wheel Part 2 Hub 3 Hub Shaft 4 Bolt 5 Fork 6 Nut 7 Rim 8 Spoke Wire 9 Tire 10 Motor 11 Motor Support Tool 12 Mounting Tool 13 Part of Support Tool 14 Grasping Tool 15 Beam Member 16 Motor Rotating Shaft 17 Driving Roller 18 Motor Top 19, 20 Shaft Member 21 Driving Roller Position Fixing Arm Member 22, 23 End of Driving Roller Position Fixing Arm Member 24 Mounting Tool 25 Mounting Shaft 26 Driving Roller Position Operating Arm Member 27 Mounting Member 28 Bar Member 29 Sheath Member 30 Spring 31 Outer End of Beam Member 32 Loading Platform 33 Support Rod 34 Fixture 35, 36 Rotational Arrow

Claims (2)

[Claims] 1. An electric bicycle equipped with a motor as a power source, a motor holding member fixed to a rotating shaft of a bicycle wheel together with a lower end portion of a supporting member of the bicycle, and directly or on the rotating shaft of the motor. Indirectly coupled via a transmission device, a driving roller provided so as to be able to contact a part of the wheel, and a position closer to the wheel than the rotation shaft of the motor,
An electric bicycle comprising: one end portion rotatably supported, and the other end rotatably attached to a column member of the bicycle for holding a driving roller. 2. In an electric bicycle equipped with a motor as a power source, a motor holding member that is fixed to a rotating shaft of a bicycle wheel together with a lower end portion of a column member of the bicycle and holds the mounted motor, and the motor. A driving roller that is directly or indirectly connected and is capable of contacting a part of the bicycle wheel, a beam member whose first end is connected to a column member of the bicycle, and a second end of the beam member. One end is connected to the part,
An auxiliary strut member, the other end of which is connected to the rotating shaft of the bicycle wheel together with the lower end of the strut member of the bicycle and a motor holding member, and reciprocally supported on the second end side of the beam member. Driving roller position operating arm member including a rod member and a spring member supported on the second end side, and a driving roller including an attachment shaft member fixed to the first end side of the beam member. The mounting member of the position fixing arm member and one end of the mounting member are rotatably mounted on the mounting shaft member, and the other end of the mounting arm member is rotated on the mounting shaft member located on the wheel side of the rotation shaft on the upper surface of the motor. An electric bicycle comprising: a roller position fixing arm member that is movably attached.