JPH0874960A - Mobile equipment driving device - Google Patents

Abstract

PURPOSE: To provide a mobile equipment driving device which can be easily installed in mobile equipment. CONSTITUTION: A mobile equipment driving device substantially constructed of a wheel 12 on the rear side of mobile equipment 11, a driving force transmitting wheel 15 rotationally driven by driving force of a motor 14 fixed in a frame 13 in the mobile equipment 11, and an intermediate wheel 16, which is arranged between the wheel 12 and the driving force transmitting wheel 15 and transmits driving force of the driving force transmitting wheel 15 to the wheel 12, is removably installed in the frame 13 of the mobile equipment 11 via an attaching/removing means 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for driving wheels of a mobile device such as a bicycle when it is mounted on the mobile device.

[0002]

2. Description of the Related Art In a mobile device such as a bicycle, traveling load is generally large when climbing a hill. Therefore, a deceleration means is provided to reduce the traveling load. Further, in recent years, it has been proposed to reduce the addition when climbing a hill by a mechanism that assists the traveling driving force. For example, in the case of a bicycle,
As shown in FIG. 4, a drive force assisting mechanism 3 provided in the crank chamber 2 at the center of the frame 1 assists the drive force. This driving force assisting mechanism 3 utilizes the driving force of the electric motor, and senses the stepping force of the pedal 4 to automatically change the output of the electric motor so as to generate an appropriate amount of driving force. I have to.

[0003]

However, the bicycle has the following problems due to the driving force assisting mechanism 3 being incorporated in the crank chamber 2. That is, in order to obtain a sufficient torque, the driving force assisting mechanism 3 becomes large in size and increases in weight, which deteriorates running performance, maneuverability and the like, and also increases cost. Also, because of its special configuration, it cannot be retrofitted to the finished vehicle, and it is difficult to spread it.
Further, since the battery for driving the electric motor is generally incorporated in a bicycle and is difficult to remove, it is necessary to move the battery to the charging place together with the bicycle during charging, which is inconvenient.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a mobile device driving apparatus which is lightweight and easy to mount on a mobile device.

[0005]

The present invention has the following features to attain the object mentioned above. That is, in the mobile device drive device according to claim 1, the drive force of the drive force transmission wheel is provided between the wheel and the drive force transmission wheel that is rotationally driven by the drive force of the motor fixed to the frame of the mobile device. An intermediate wheel for transmitting to the wheel is provided, the wheel and the driving force transmitting wheel are made of a magnetic material, and the intermediate wheel is made of a magnet having a diameter larger than the distance between the wheel and the driving force transmitting wheel. That is, the means for solving the above-mentioned problems.

According to another aspect of the present invention, there is provided a means for solving the above-mentioned problem, in which the wheel, the driving force transmitting wheel and the intermediate wheel are arranged on substantially the same plane.

According to another aspect of the present invention, there is provided a means for solving the above-mentioned problems, in which the driving force transmitting wheel and the intermediate portion are arranged inside the wheel.

According to another aspect of the present invention, there is provided a mobile device driving apparatus, wherein the intermediate wheel is supported by an arm which moves on a plane substantially the same as the plane on which the wheels and the driving force transmitting wheels are arranged. The means.

According to another aspect of the present invention, there is provided a means for solving the above-mentioned problems, in which the motor, the driving force transmission wheel and the intermediate wheel are attached to the frame of the mobile equipment via the attaching / detaching means.

[0010]

According to the mobile device driving apparatus of the first aspect, the magnet is attracted to the driving force transmitting wheel and the outer peripheral surface of the wheel. This intermediate wheel rotates in the same direction as the driving force transmitting wheel,
The wheels rotate in the opposite direction to the drive force transmitting wheels. At this time, since the magnetic intermediate wheel is attracted by its own attractive force, friction between the intermediate wheel and the driving force transmitting wheel and the wheel is extremely small.

According to the mobile device driving apparatus of the second aspect, the wheel, the driving force transmitting wheel, and the intermediate wheel are located on substantially the same plane, so that space can be saved. Further, although the intermediate wheel is brought into contact with the wheel in the normal direction thereof, the stress of the wheel is secured as compared with the case where the intermediate wheel is brought into contact with the side surface.

According to the mobile device driving apparatus of the third aspect, the driving force transmitting wheel and the intermediate wheel are located inside the wheel, so that further space saving is possible.

According to another aspect of the present invention, in the case where the present invention is not used, the drive force transmitting wheel is separated from the wheel, and the arm is moved during use to move the drive force transmitting wheel to the wheel. Abut. Except when in use, there is no friction between the driving force transmitting wheel and the wheel, so running addition is small.

According to the mobile device driving apparatus of the fifth aspect, it is possible to retrofit the mobile device by using the attaching / detaching means. Further, since the motor, the driving force transmitting wheel, and the intermediate wheel can be easily attached to and detached from the frame, repairs and energy supplement work such as electric power for driving the motor are easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mobile device driving apparatus of the present invention will be described below with reference to FIGS. As shown in FIG. 3, the mobile device driving apparatus 10 of the present embodiment is mounted on a bicycle 11 as a mobile device. The mobile device driving device 10 includes a wheel 12 on the rear side of the bicycle 11, a driving force transmitting wheel 15 which is rotationally driven by a driving force of a motor 14 fixed to a frame 13 of the bicycle 11, and the wheel 12 and the driving force. The intermediate wheel 16 is provided between the transmission wheels 15 and transmits the driving force of the driving wheels 15 to the wheels 12. The intermediate wheels 16 are detachably attached to the frame 13 of the bicycle 11 via the attaching / detaching means 17. There is. The output of the motor 14 can be changed by operating a lever (not shown) provided near the handle of the bicycle 11.

The driving force transmission wheel 15 is shown in FIG. 1 and FIG.
As shown in FIG. 3, a support shaft 19 arranged in parallel with the drive shaft 18 of the motor 14, and a first transmission wheel 20 and a second transmission wheel 21 coaxially provided on the support shaft 19 and spaced apart from each other. It consists of and. The outer periphery of the first transmission wheel 20 is brought into contact with the drive shaft mounting wheel 22 mounted at the tip of the drive shaft 18, and is driven to rotate by the driving force of the motor 14. The second transmission wheel 21 is formed to have a diameter dimension that is approximately half that of the first transmission wheel 20. A concave groove 21a into which the intermediate wheel 16 can be fitted is formed on the entire outer peripheral portion of the second transmission wheel 21. The insertion portion 2 fitted to the fitting support portion 20a provided at one end portion of the first transmission wheel 20 is provided at one axial end portion of the second transmission shaft 21.
1b is coaxially projected. The insertion portion 21b is inserted and fitted into the fitting support portion 20a,
A fixing screw 15a screwed into a through hole provided through the a side portion is integrally rotatably fixed to the fitting support portion 20a. The fixing screw 15a is screwed into the through hole to integrally and rotatably fix the fitting support portion 20a and the insertion portion 21b with an axial relative distance being an appropriate distance.

The intermediate wheel 16 has a rubber layer on the outer peripheral portion thereof, and the inner peripheral surface of the rim 12a of the wheel 12 and the second transmission wheel 2 are provided.
1 is in contact with both outer peripheral surfaces. Also, the intermediate wheel 16
Is rotatably provided about an axis parallel to the fixing screw 19 and moves on a plane substantially the same as the plane on which the wheels 12 and the second transmission wheels 21 are arranged.
It is supported at the tip of 3.

The arm 23 is provided with a first link 26 provided on one side portion of a flange 29, which will be described later, of the attaching / detaching means 17 so as to be rotatable in a moving plane of the arm 23 via a pin 25. Pin 27 is attached to the tip of the first link 26.
And a second link 28 that is rotatably provided in the moving plane. The tip of the second link 28 of the arm 23 is fixed by the spring S to the wheel 1
It is always pulled in a direction that bites between the second transmission wheel 21 and the second transmission wheel 21.

The attachment / detachment means 17 includes a fixed plate 24 fixed to the frame 13 and the fixed plate 24.
The flange 29 is fixed to the fixing plate 24 and extends in the direction opposite to the frame 13 with respect to the fixing plate 24, and the fixing fitting 30 for mounting the fixing plate 24 on the frame 13. The flange 29 is fixed perpendicularly to the fixed plate 24. The flange 29 is provided with a holding mechanism R that holds the arm 23 and holds the intermediate wheel 16 at a position separated from the wheel 12 and the second transmission wheel 21 against the pulling force of the spring S. There is. The holding mechanism R is configured to be able to release the holding of the arm 23 by operating the lever. Fixing bracket 3
Reference numeral 0 denotes a ring shape, which is mounted on the outside of the frame 13 and the screw 31 is screwed into the screwing portion 30a to reduce the diameter of the whole and tighten the frame 13. A battery 32 for rotationally driving the motor 14 is fixed to a side portion of the flange 29 of the attaching / detaching means 17 opposite to the arm 23.

In the mobile device driving apparatus 10, the arm 23 is held by the holding mechanism R and the intermediate wheel 16 is separated from the wheel 12 and the second transmission wheel 21 in a normal state, and the torque required to rotate the wheel 12 is maintained. Is increased, the lever is operated to release the holding of the arm 23 by the holding mechanism R. The arm 23, which has been released from the holding by the holding mechanism R, is pulled up by the pulling force of the spring S, and as a result, the intermediate wheel 16 comes to the inner peripheral surface of the wheel 12 and the outer peripheral surface of the second transmission wheel 21. Abut. At this time, the intermediate wheel 16 is attracted to the wheel 12 and the second transmission wheel 21 by the magnetic force.
Of the wheel 12 and the second
Bite into the transmission wheel 21 of the. Further, the holding mechanism R
The motor 14 is rotationally driven in association with the release of the holding of the arm 23 in FIG. The rotational driving force of the motor 14 is
It is transmitted to the second transmission wheel 21 via the drive shaft mounting wheel 22, the first transmission wheel 20, and the fixing screw 19, and further, the second transmission wheel 21.
Is transmitted from the transmission wheel 21 to the wheel 12 via the intermediate wheel 16.

When the mobile device driving device 10 is not used, the lever is returned or the arm 23 and the holding mechanism R are directly connected.
The arm 23 is re-clamped by the holding mechanism R by operating, and the intermediate wheel 16 is separated from the wheel 12 and the second transmission wheel 21.

Therefore, the mobile device driving apparatus 10
Has a simpler structure than the conventional device, and since the driving force of the motor 14 is directly transmitted to the wheels 12, the size of the motor 14 and the like can be reduced.
(1) The total weight is reduced, and the running and handling of the bicycle 11 are improved. In addition, the intermediate wheel 16 is attracted by the magnet to the wheel 12
Also, since the rotational drive force is cut into an appropriate position between the second transmission wheel 21 and the loss of the rotational driving force due to friction is reduced, the transmission efficiency of the driving force from the second transmission wheel 21 to the wheel 12 is improved, and the size is further reduced. It is possible to reduce the weight and the weight, and it is possible to further improve the running performance and the controllability.

Wheel 12, second transmission wheel 21, intermediate wheel 16
Since and are arranged on the same plane, the dimension of the wheel 12 of the mobile device driving apparatus 10 along the axial direction is suppressed, the whole is formed compact, and the mobile device driving device 10 can be further downsized. Is.

Since the driving force transmitting wheel 15 is arranged inside the wheel 12, the mobile device driving device 10 does not project to the outside of the bicycle 11, does not interfere with the running of the bicycle 11, and the mobile device driving device is provided. Since the bicycle 10 is located near the center of gravity of the bicycle 11 and the protrusion in the left-right direction is suppressed, the traveling and maneuverability of the bicycle 11 are further improved.

Since the intermediate wheel 16 is supported by the arm 23, it is easy to bring the intermediate wheel 16 into and out of contact with the wheel 12 and the second transmission wheel 21, so that the mobile device driving apparatus 10 can be operated. When not using the intermediate wheel 16 the wheel 1
By separating from the second and second transmission wheels 21, the additional rotation of the wheels 12 is not increased.

The mobile device driving device 10 is provided with an attaching / detaching means 17
Since it is attached to the bicycle 11 via the, the completed bicycle 11 can be retrofitted, and the versatility is improved, and repair work and charging of the battery 32 for driving the motor 14 are performed by the mobile device drive device 10. Since it can be removed from 11 and performed at an appropriate position, its workability is improved.

The mobile device driving apparatus 10 may be configured such that the second transmission wheel 21 is directly driven to rotate by the motor 14. Also, the driving force transmission wheel 1
As a mechanism for transmitting the driving force of the motor 14 to the motor 5, for example, a mechanism using a timing belt may be used. The mechanism for causing the intermediate wheel 16 to bite between the wheel 12 and the second transmission wheel 21 may have a configuration other than the arm 23 described above. The intermediate wheel 16 and the wheel 12 and the second
A mechanism other than the spring S may be used as a mechanism for forcibly engaging with the transmission wheel 21. In the present embodiment, the device of the present application is mounted on the bicycle, but it can be applied to other mobile devices.

[0028]

As described above, according to the mobile device driving apparatus of the first aspect, the structure is simple, and moreover,
Since the driving force of the device is directly transmitted to the wheels, the size of the motor and the like can be reduced, the total weight of the mobile device can be reduced, and the running performance and maneuverability of the mobile device can be improved. Further, the intermediate wheel bites into an appropriate position between the wheel and the driving force transmitting wheel by the attractive force of the magnet, and the loss of the rotational driving force due to friction is reduced, so that the efficiency of transmitting the driving force from the driving force transmitting wheel to the wheel is improved. As a result, it is possible to further reduce the size and weight, and it is possible to further improve the drivability and maneuverability.

According to the mobile device driving apparatus of the second aspect, the wheel, the driving force transmitting wheel, and the intermediate wheel are arranged on the same plane. Therefore, the dimension of the wheel of the mobile device driving apparatus in the axial direction is set. Is suppressed, the whole is formed compact, and the mobile device drive device can be further downsized.

According to the mobile equipment drive device of the third aspect, since the drive force transmitting wheel is arranged inside the wheel,
Since the mobile device driving device does not project to the outside of the mobile device, it does not hinder the traveling of the mobile device, the mobile device driving device is located near the center of gravity of the mobile device, and the lateral projection is suppressed. Further, the traveling and maneuverability of mobile equipment are further improved.

According to the mobile device drive device of the fourth aspect, since the intermediate wheel is supported by the arm, it is easy to bring the intermediate wheel into contact with and separate from the wheel and the driving force transmitting wheel. By keeping the intermediate wheel away from the wheels and the drive force transmitting wheels when the mobile device drive device is not used, the additional rotation of the wheels is not increased.

According to the mobile equipment driving device of the fifth aspect, since the mobile equipment driving device is attached to the mobile equipment through the attaching / detaching means, it can be retrofitted to the completed mobile equipment, and thus the versatility is high. In addition, the workability is improved because the mobile device drive device can be detached from the mobile device and repaired or energy supplement work for driving the motor can be performed at an appropriate position.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a mobile device driving apparatus of the present invention.

FIG. 2 is a front view showing the mobile device driving apparatus of the embodiment.

FIG. 3 is an overall side view showing a mounting position of the mobile device driving apparatus of the embodiment.

FIG. 4 is a side view showing a conventional driving force assisting mechanism.

[Explanation of symbols]

 10 Mobile Equipment Driving Device 11 Mobile Equipment (Bicycle) 12 Wheels 13 Frame 14 Motor 15 Driving Force Transmission Wheel 16 Intermediate Wheel 17 Attachment / Detachment Means

Claims (5)

[Claims] 1. A drive device for driving a wheel of a mobile device such as a bicycle when the wheel is mounted on the mobile device, the rotary device being driven by a driving force of the wheel and a motor fixed to a frame of the mobile device. An intermediate wheel that transmits the driving force of the driving force transmitting wheel to the wheel is provided between the driving force transmitting wheel and the driving force transmitting wheel, and the wheel and the driving force transmitting wheel are made of a magnetic material, and the intermediate wheel is a wheel. A mobile device drive device, wherein the mobile device drive device is formed of a magnet having a diameter larger than a distance between the drive force transmitting wheel and the drive force transmitting wheel. 2. The mobile device drive apparatus according to claim 1, wherein the wheel, the driving force transmitting wheel, and the intermediate wheel are arranged on substantially the same plane. 3. The mobile device drive apparatus according to claim 2, wherein the drive force transmitting wheel and the intermediate portion are arranged inside the wheel. 4. The mobile equipment drive according to claim 2, wherein the intermediate wheel is supported by an arm that moves on a plane substantially the same as the plane on which the wheels and the driving force transmitting wheels are arranged. apparatus. 5. The motor, the driving force transmitting wheel, and the intermediate wheel,
The mobile device drive apparatus according to any one of claims 1 to 4, wherein the mobile device drive device is attached to a frame of the mobile device via an attaching / detaching means.