JPH1016873A - Bicycle with auxiliary power device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bicycle with an auxiliary power device having the operating function as a health apparatus by providing a momentum calculating means calculating based on the detected result of a rotating force detecting means and the calculated result of a vehicle speed calculating means, providing a display means, and displaying the momentum. SOLUTION: The rotating force corresponding to the leg power of a driver is outputted to a momentum calculating means from a torque sensor 100, and the output corresponding to the rotation of a drive gear 56, i.e., pulse signal, is sent to a vehicle speed calculating means from a speed sensor 160 to calculate the vehicle speed. Momentum is calculated by a momentum calculating means 305 based on the output from the torque sensor 100, i.e., rotating force, and this vehicle speed, it is stored in a memory means, the momentum in the memory means is displayed on a display via the control of an output device, and the driver can confirm his momentum in the past.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle with an auxiliary power device for assisting a rotational force from an auxiliary power device when the pedal effort reaches a predetermined value during manual driving.

[0002]

2. Description of the Related Art Conventionally, when the pedaling force of a pedal reaches a predetermined value, the torque of the electric motor is transmitted to a rear wheel via a hollow shaft, a sprocket and a chain via a speed reduction mechanism to reduce the pedaling force. Powered bicycles are widely known.
This type of bicycle with an auxiliary power unit assists the rotational force of the electric motor when the pedaling force of the pedal requires a predetermined value, that is, a predetermined amount of pedaling force, such as when traveling on an uphill. Although it has the advantage of making traveling easier, no consideration is given to its function as a health device, that is, how to use it. In addition, Japanese Patent Application Laid-Open No. 7-96877 and Japanese Patent Application Laid-Open No. 5-2013
No. 74 is disclosed.

As described in the detailed description of the invention and in the drawings, a pressure sensor or a pressure sensor provided on a pedal is disclosed in Japanese Patent Application Laid-Open No. 7-96877. Strain gauge, magnet attached to spoke, transmitter attached outside the rotation path of this magnet, receiver attached to handle, magnet for crank rotation detection provided on crank, rotation detection pulse signal related to this magnet The bicycle is provided with a running state detecting device including a reed switch, a CPU, an indicator, etc.
In U, the amount of exercise of the driver is calculated based on the average depressing pressure value of the pedal, the traveling distance, and the traveling time, and the amount of exercise is displayed on the display so that the driver can confirm the amount of exercise.

[0004] As described above, the driver can check his / her own exercise amount by the running state detecting means attached to the bicycle, thereby making it easier to use the bicycle as a health device. However, in order to make the device described in this publication easy to use as a health device, it is necessary to attach the traveling state detecting device to a bicycle, and the configuration of this traveling state detecting means is apparent from the description in the publication. As described above, it is complicated because it is composed of many components, and its mounting position must be distributed and arranged in each part of the vehicle body. There is a problem that becomes. In addition, since the components are exposed to the outside, accurate operation is impaired due to dirt, etc.In addition, when the vehicle body falls over due to the outside, the components are damaged. There is a risk of doing this.

The bicycle with a momentum meter described in Japanese Patent Laid-Open No. 5-201374 is provided with a tension detecting mechanism for measuring the tension of a power transmission chain of a running bicycle, and the tension detecting mechanism detects the tension. The processed data is processed by the processing unit to detect the amount of exercise and displayed on the display unit. Since this type detects chain tension, the detected tension will vary due to looseness of the chain, etc., and this will increase the accuracy.In addition, the chain will engage with a gear that is part of the tension detection mechanism. Therefore, there is a problem that the tension detecting mechanism is easily damaged by an external force applied by the chain.

[0006]

As described above, the conventional bicycle with an auxiliary power device has the advantage of assisting the driver's treading power to make traveling easier, however, consideration is given to how to use the bicycle as a health device. On the other hand, in a bicycle which has been conventionally used as a health device, a bicycle in which a running state detecting device is attached to a bicycle is composed of a number of components, and each of these components is Has to be arranged separately in each part of the vehicle body, there is a problem that the configuration is complicated and requires a lot of assembly man-hours at the time of mounting, and is expensive in terms of cost. When each component is placed in an exposed state, the correct operation is impaired due to dirt etc., and since it is exposed to the outside, If the body falls down like a problem that there is a fear that the elements may be damaged.

[0007] Further, in the apparatus provided with a tension detecting mechanism for measuring the tension of the power transmission chain of a running bicycle, the detected tension varies due to the looseness of the chain and the like. Since the gear which is a part of the tension detecting mechanism is meshed with the chain, there is a problem that the tension detecting mechanism is easily damaged by an external force applied by the chain.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the invention according to claim 1 comprises a vehicle body, a battery and a housing for housing the battery, and is detachable from the vehicle body. A storage device, a storage case, an electric motor mounted on the storage case, an auxiliary power unit mounted on the vehicle body, comprising a reduction mechanism for reducing the rotational force of the motor, and rotatable on the storage case. A hollow shaft that is provided with a torque transmitted from the auxiliary power unit, a crankshaft that is rotatably provided in the hollow shaft, and a rotational force due to a pedaling force that is transmitted to the crankshaft via the crank. Turning force detecting means, a speed sensor, vehicle speed calculating means for calculating a vehicle speed based on the output of the speed sensor, the turning force detecting means and a vehicle speed calculating means. Motor control means for controlling the auxiliary power unit to supply torque to the hollow shaft according to the output of the motor; and momentum calculation for calculating momentum based on the detection result of the torque detection means and the calculation result of the vehicle speed calculation means. Means and a display means, and a bicycle with an auxiliary power device for displaying the exercise amount calculated by the exercise amount calculation means on the display means.

According to the first aspect of the present invention, a bicycle with an auxiliary power unit is provided with a function to be used as a health device, and its structure is simplified to improve accuracy. It has the function of preventing the occurrence of breakage and the like.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a switching means for selectively switching between supplying and stopping the supply of the rotational force from the auxiliary power unit to the hollow shaft. A bicycle with an auxiliary power device, wherein when the supply of torque from the auxiliary power device is stopped by switching the switching device, the amount of exercise calculated by the amount of exercise calculation device is displayed on the display device.

According to a second aspect of the present invention, in addition to the function of the first aspect, switching means for selectively switching between supplying and stopping the supply of rotational force from the auxiliary power unit to the hollow shaft. The user desires a power assisted driving mode that enables easy running by assisting the rotational force from the auxiliary power device by switching the switching means, and a manual driving mode using only human power mainly serving as a health device. In addition, when at least the switching mode is switched to the manual driving mode, the exercise amount calculated by the exercise amount calculation unit is displayed on the display unit. It has the effect of being able to check the momentum during running.

According to a third aspect of the present invention, there is provided a bicycle with an auxiliary power unit, wherein the battery device according to the first or second aspect is provided with a memory for storing the exercise amount calculated by the exercise amount calculation means. It is what it was.

According to the third aspect of the present invention, in addition to the functions of the first and second aspects of the present invention, the contents stored in the memory for storing the momentum provided in the battery device are stored. In addition, when the battery is charged or the like, the amount of exercise due to running can be displayed on the display and confirmed.

[0014]

Next, an embodiment of the present invention will be described with reference to FIGS. As shown in the figure,
A bicycle with an auxiliary power unit (hereinafter simply referred to as a bicycle) A is
The vehicle body B includes an auxiliary power unit (hereinafter simply referred to as a power unit) C attached to the vehicle body B. The vehicle body B is composed of a general bicycle, that is, a general-purpose bicycle that is generally commercially available, and includes a standing pipe 2 and a lower pipe 3 having one end fixed to a hanger lug 1, and fixed to the other end of the lower pipe 3. A frame 6 comprising an upper pipe 5 having one end fixed to the head pipe 4 and the other end fixed to a lower portion of the standing pipe 2; a chain stay 7 having one end fixed to the hanger lug 1; A front fork 8 attached to the head pipe 4, a handle 9 attached to the upper end of the front fork 8, a front wheel 10 attached to a lower end of the front fork 8, and one end fixed to the upper part of the standing pipe 2. The other end of the chain stay 7 is fixed to the other end of the chain stay 7 via a rear pawl (not shown), a back fork 11, the rear wheel 12 attached to the other end of the chain stay 7, Saddle 13 mounted above the seat tube 2, and a receiving platform 14 or the like provided in the upper portion of the rear wheel. The front wheel 10 and a part of the rear wheel 12 are covered by covers 10a and 12a, respectively. The hanger lug 1 is provided with a crankshaft 80 to be described later rotatably, and a left crank 81 and a right crank 82 provided with pedals 81a and 82a are attached to both ends of the crankshaft 80, respectively. . In addition, a battery device 400 described later is attached to the upper part of the loading tray 14. Further, as shown in FIG. 8, the battery device 400 is connected to a motor 40 and the like described later by a lead wire 411 (not shown in FIG. 1) inserted through the wiring tube 16. A signal line 412 (not shown in FIG. 1) for transmitting a momentum signal is inserted through a control device 300 described later and a memory unit 450 described later provided in the battery device 400. Further, a chain 18 is mounted on the sprocket 17 for transmitting the rotational force during traveling and the sprocket 17 (not shown) of the rear wheel 12.

Next, the configuration of the power unit C and how to assemble the power unit C will be described.

First, the structure of the power plant C is shown in FIGS.
It will be described based on. As shown in the figure, the power unit C includes a case 20 as a storage case, an electric motor 40 attached to the case 20, and a speed reduction mechanism 50. A hollow shaft 70 to which a rotational force is transmitted from a mechanism, and a crankshaft 80 penetrating the hollow shaft 70 are provided. The case 20 houses a control device 300 including a microcomputer, a ROM, a RAM, and the like, which will be described later.

Next, the above components will be described. First, the case 20 includes a bottom wall 231 and the bottom wall 2.
A case body 230 is formed in the shape of a box with a bottom having an opening at one end with a peripheral wall 232 formed around the periphery of the base 31, and a lid case 250 for closing the opening of the case body 230. The case body 230 and the lid case 250 are formed of a material having good thermal conductivity, for example, a metal such as aluminum.

In the case body 230, an installation chamber 233 in which a part of the speed reduction mechanism 50 is installed is formed on one end side, that is, on the side where the hollow shaft 70 is mounted, and on the other end side. A storage room 234 for storing the control device 300 and the like is provided adjacent to the installation room 233. The side of the storage chamber 234, that is, the hollow shaft 7
A mounting portion 235 formed side by side with the storage chamber 234 and to which the electric motor 40 is mounted is provided on the side where the protrusions 0 protrude. The mounting portion 235 and the installation chamber 233 are provided.
And an arrangement chamber 236 in which a part of the speed reduction mechanism 50 is disposed. The storage room 23
4 is a gap G between the mounting portion 235 and the mounting portion 235 as shown in FIG.
Is formed so as to form a U-shape with the mounting portion 235, and the lower pipe 3 is positioned in the gap G.

As shown in FIG. 2, the installation chamber 233 has a concave first bearing mounting portion 233a formed on the bottom wall 231 and a second bearing mounting portion formed through the bottom wall 231. 233b are respectively formed.

As shown in FIG. 2, the storage chamber 234 has a printed board 30 on which various electronic component elements 301b are provided on mounting bosses 234a by mounting screws 301a.
1 is attached.

A battery level indicator 302 for displaying the battery level is provided on the outer wall of the U-shaped portion of the storage chamber 234 as shown in FIG. The indicator 302 is provided with LEDs 303a to 303e corresponding to the remaining amount display numerical values (100 to 20% indicating the remaining amount of 100% to 20% in FIG. 4), and the LEDs 303a to 303e are turned on. To display the remaining amount.

Next, the mounting portion 235 for mounting the electric motor 40 is provided with an insertion port 235b which is surrounded by an annular wall 235a and formed at one end side, that is, an upper opening in FIG. A plurality of through holes 2 (only one is shown in FIG. 2)
35c is provided.

The cover case 250 attached to the opening of the case main body 230 constructed as described above has a first bearing mounting portion 233a and a second bearing mounting portion 233b formed on the case main body 230. Correspondingly, a bearing mounting portion 251 and a through hole 252 are formed, and a plurality of (only one is shown in FIG. 2) screw holes 255a for mounting screws 255 are formed on the peripheral edge. Further, an annular seal member storage portion 253a for storing the seal member 253 is formed around the through hole 252. The case body 230 and the lid case 250 are connected to the screw 255 through a packing (not shown) in a state in which the speed reduction mechanism 50, the control device 300, and the like are stored.
a so as to be integrally connected and attached.

Next, the motor 40 has a plurality of mounting bases 42 (one in FIG. 2) on the end face on the side where the output shaft 41 protrudes.
A plurality of (only one is shown in FIG. 2) protrusions 44 are attached to the mounting table 42.
Are formed. Then, the electric motor 40 is inserted through the insertion port 235b in a state where a cylindrical buffer body 45a made of rubber or the like is fitted around, and is housed in the mounting portion 235, and the protrusion 44 is inserted together with the buffer body 45a into the through hole. Hole 23
5c, the rear end side, that is, the side opposite to the side from which the output shaft 42 protrudes, is covered by the cover 47 with the buffer 45b interposed.
The electric motor 40 is attached to the attachment portion 235 by attaching the lid 47 to the case main body 230 with the screws 46 while covering the cover 47.

Next, the speed reduction mechanism 50 will be described. The speed reduction mechanism 50 is connected to the output shaft 41 of the electric motor 40.
, A large-diameter gear 52 meshing with the gear 51, a small-diameter gear 53 provided integrally with the gear 52, and a gear 53 rotatably mounted on a fixed shaft 54a. A gear 54 including a large-diameter gear 54b that meshes with a bevel gear 54c integrated with the gear 54b, a bevel gear 55 that meshes with the bevel gear 54c, and a bevel gear 55
A gear 55b mounted on the same shaft 55a as the shaft on which the gear is mounted, and a driving gear 56 meshing with the gear 55b
It is composed of

Ball bearings 55c and 55d are mounted on both ends of a shaft 55a on which the bevel gear 55 and the gear 55b are mounted. The bearings 55c and 55d are connected to the case body 230 and the lid case 250, respectively. The first bearing mounting portion 233a provided in each
And the bearing mounting portion 251. The gear 55b is mounted on the shaft 55a via a one-way clutch 55f. This one-way clutch 55
f rotates the gear 55b so as to transmit the torque of the electric motor 40 to the drive gear 56 so that the bicycle travels normally, that is, travels in the forward direction, but functions to idle in the reverse direction. Things. In other words, the one-way clutch 55f is used when the pedal 81
When the cranks 81 and 82 to which the motors a and 82a are attached rotate in the traveling direction, they function so as to idle.

A shaft hole 56a is formed at the center of the drive gear 56, and a concave and convex strip 56c is formed in the shaft hole 56a. Further, on the side surface of the drive gear 56 on the side of the lid case 250, a plurality (three in the embodiment, three in the embodiment) concentrically arranged on the outer periphery of the shaft hole 56a as shown in FIGS.
2 and 3, only one projection 57 is formed. The projection 57 extends along the direction of the arrow shown in FIG. 5, that is, along the direction in which the drive gear 56 rotates during traveling, as shown in FIG. Is formed with an inclined surface 57a that gradually rises upward. Further, the cover case 25 of the drive gear 56
On the side surface on the 0 side, as shown in FIG. 3, there are provided a plurality (three in the embodiment, which are located between the adjacent protrusions 57 and concentric with the shaft hole 56a, An L-shaped regulating member 58 for regulating one end of a compression spring 60 (only one is shown), which will be described later, is formed.

Next, the power, that is, the rotational force of the electric motor 40, which is transmitted through the reduction mechanism 50, is fitted into the shaft hole 56a formed in the drive gear 56, and the sprocket 17
Will be described. This hollow shaft 7
Reference numeral 0 denotes an uneven ridge 7 having a through hole 71 therein and engaging with an uneven ridge 56c formed in the shaft hole 56a at one end.
2, the hollow shaft 70 is prevented from rotating in the circumferential direction by the engagement of the two concave and convex strips 56c and 72 when fitted in the shaft hole 56a, and the hollow shaft 70 rotates integrally with the drive gear 56. . A mounting member 17a to which the sprocket 17 is mounted is attached to the other end of the hollow shaft 70. In addition, the hollow shaft 70 has a ball bearing 7 near the concave and convex strips 72 formed on the one end side.
7 is press-fitted into the inner ring of the hollow shaft 7.
Numeral 0 is attached to the case body 230 by press-fitting the outer ring of the ball bearing 77 into the second bearing attachment portion 233b provided on the case body 230.

Next, a description will be given of a crankshaft 80 which is attached through the through-hole 71 of the hollow shaft 70. At one end of the crankshaft 80, a mounting portion 83 provided with a fitting portion 83a whose outer periphery is formed in a prismatic shape,
On the other end side, a fitting portion 84a whose outer periphery is similarly formed in a prismatic shape
Are formed, respectively. The attachment portions 83 and 84 are fitted to the fitting portions 81 of the left crank 81 and the right crank 82 of the general bicycle described above.
b, 82b.

A one-way clutch 85 is attached to the crankshaft 80 at a position close to the drive gear 56 attached to the hollow shaft 70, and is connected to the crankshaft 80 via the one-way clutch 85. Has a drive plate 90 attached. The one-way clutch 85
Are pedals 81a, 82 when the crankshaft 80 is running manually.
a is rotated in the traveling direction by the attached cranks 81 and 82, the drive plate 90 is rotated,
On the contrary, when the crankshaft 80 rotates, it idles,
It functions so as not to rotate the driving plate 90. A disk-shaped flange portion 91 is formed on the cover case 250 side of the drive plate 90 at a predetermined distance so as to form a space between the drive plate 56 and a side surface of the drive gear 56. As shown in FIG. 3, the compression spring 60 is provided on the surface of the flange portion 91 on the drive gear 56 side.
A compression portion 92 is formed to abut against the other end of the compression member. The L-shaped regulating member 58 and the compression portion 9
2, the compression spring 60 is disposed.

The magnitude of the biasing force of the compression spring 60 is adjusted so that the compression spring 60 is compressed in accordance with the rotational force applied to the drive plate 90 via the crankshaft 80 and the one-way clutch 85 during manual driving. Is set. That is, in the case of manual running, the driving gear 56 is set so as to move relative to the driving gear 56 in accordance with the rotational force of the driving plate 90 which rotates together with the one-way clutch 85 with the rotation of the crankshaft 80. It is.

The flange 91 of the drive plate 90
As shown in FIGS. 2 and 5, three through holes 93 (only one is shown in FIGS. 2 and 5) are formed at portions corresponding to the protrusions 57 formed on the side surface of the drive gear 56.

An offset plate 95 made of an annular plate is provided so as to be able to approach and separate from the flange portion 91, and the offset plate 95 is provided with the through holes 9 respectively.
A slide shaft 96 is provided at a position corresponding to 3 and integrally fixed so as to penetrate an end on one end side into the through hole 93. The other end of the slide shaft 96 penetrates through the deflection plate 95 and has a spherical projection 96a at the tip.
“a” is urged so as to be pressed against the inclined surface 57 a of the projection 57 formed on the drive gear 56 by a coil spring 97 provided between the drive gear 56 and the deflection plate 95. That is, the eccentric plate 95 connects the slide shaft 96 fixed to the eccentric plate 95 to the flange portion 91.
And the coil spring 9
7 to urge the spherical projection 96a into the inclined surface 57.
The drive gear 56 and the drive plate 90 are disposed so as to be movable in the axial direction of the crankshaft 80 in a state where the drive gear 56 is pressed against the drive gear 56.

The drive gear 56, drive plate 90,
The compression spring 60 and the eccentric plate 95 are connected to the crankshaft 8.
It converts the zero rotational force into an axial force. That is, when the rotational force in the traveling direction is applied to the crankshaft 80 by the cranks 81, 82 of the pedals 81a, 82a,
This rotational force is transmitted to the drive plate 90 via the one-way clutch 85 attached to the crankshaft 80, and the drive plate 90 rotates, and when the vehicle is running uphill, etc. Has more pedals 81a,
82a must be depressed strongly. Pedal 8
1a, 82a is strongly depressed by the pedal 81
The relative movement occurs between the driving plate 90 attached to the rotating crankshaft 80 via the one-way clutch 85 and the driving gear 56 rotating integrally with the hollow shaft 70 by the a and 82a. That is, when the pedals 81a and 82a are strongly depressed in a state where a large load is applied to the hollow shaft 70, the compression spring 60 provided between the drive plate 90 and the drive gear 56 is compressed, and the drive plate 90 56, and as a result, the spherical projection 96 of the slide shaft 96 fixed to the deflection plate 95.
a moves upward along the inclined surface 57a of the projection 57 provided on the drive gear 56, and along with this movement, the coil spring 97 is compressed, and the deflection plate 95 moves in a direction away from the drive gear 56. Thus, the rotational force of the crankshaft 80 is converted into an axial force.

Then, the deflection plate 95 is connected to the drive gear 56.
Moving in the direction away from the
With the movement of the torque sensor 100, the torque sensor 100 operates via an operating rod 140 of the torque sensor 100 as a rotational force detecting means described later. The electrical output of the torque sensor 100 is converted into a digital value by a well-known A / D (analog / digital) converter and sent to the control device 300.

When the vehicle changes from traveling on an uphill to traveling on a flat surface, the compression spring 60 returns by a restoring force in accordance with the rotational force at this time, and the relative movement between the driving plate 90 and the driving gear 56 is reduced. Then, the slide shaft 96 moves downward from the inclined surface 57a of the projection 57, and the deflection plate 95 returns to the original state. As a result, the operating rod 140 of the torque sensor 100 returns to the original state, and the electrical output at this time is sent to the control device 300.

The power unit C has a lid case 250.
A start switch 15 is provided as a switching means provided in the apparatus. The start switch 15 is provided with a key insertion hole 15a. A key (not shown) is inserted into the key insertion hole 15a to perform a closing / opening operation. By doing so, the supply and stop of electric power from the battery 441 to the electric motor 40, which will be described later, are performed. And start switch 1
When the vehicle 5 is closed, a power assisted traveling mode is provided in which the vehicle can be easily traveled with the assistance of the rotational force from the power unit C. When the vehicle is opened, a human powered traveling mode using only human power mainly serving as a health device is provided. It is what becomes.

Next, the structure of the torque sensor 100 will be described with reference to FIGS. As shown in FIG. 6, the torque sensor 100 includes a case main body 101 including a lower case 110 and an upper case 120 attached to the lower case 110, a strain gauge 130 as a sensor provided in the case main body 101, Operating rod 140 which receives the acting force of detected torque and operating rod 140
And a coil spring 150 for transmitting the acting force received to the strain gauge 130.

Then, as shown in FIG. 7, the strain gauge 130 is connected to the amplifier 1 via lead wires 133a and 133b.
36, which is connected to the control device 300 via the A / D converter not shown.

The upper case 120 is provided on the bottom wall 12.
1 is formed in a box shape with a bottom having an outer peripheral wall 122 formed on the outer periphery thereof. The bottom wall 121 is formed with a cylindrical portion 125 protruding inward and outward of the bottom wall 121, respectively. A guide hole 126 is formed in a portion from the outer end to the substantially middle portion, and a hole 127 larger in diameter than the guide hole 126 is formed in the portion from the middle to the inner end.
Are formed.

Then, the sensor, that is, the strain gauge 1
Reference numeral 30 denotes four thin-film resistors R1 formed on a surface of a strain body 131 made of, for example, aluminum through an insulating film.
R4 to R4 (not shown in FIG. 6) are attached by so-called semiconductor technology or the like, and these four resistors R1 to R4 are formed by printed wiring conductors to form a bridge W as shown in FIG. It is configured to be connected. A connection point between the resistors R1 and R3 and a connection point between the resistors R4 and R2 of the bridge W are connected to a power supply via lead wires 132a and 132b, and a connection point between the resistors R1 and R4. The connection point between the resistors R2 and R3 is an output terminal, and the output from this output terminal, that is, the electrical output corresponding to the magnitude of the detected torque, is output through the lead wires 133a and 133b. The amplifier 136 is sent to the control device 300 via the A / D converter (not shown).
The control device 300 controls the output including the driving and stopping of the electric motor 40, that is, the torque, in accordance with this output and the output from the speed sensor 160 described later.

The free end 131a of the flexure element 131 fixed between the lower case 110 and the upper case 120 with the fixed end sandwiched therebetween is located below the inner end of the cylindrical portion 125 and has a guide hole 126. A pin 134 having an axis coinciding with the axis of the guide hole 126 is attached to the tip of the pin 134, and the pin 134 receives the other end of the coil spring 150 in an annular shape. A collar 134a is formed.

The operating rod 140 is connected to the guide hole 1.
The shaft 141 is guided by the shaft 26 and slidably fits in the axial direction. The shaft 141 has a large diameter stopper 142 formed at one end of the shaft 141. Also, the operating rod 1
A step 145 that receives the end of the coil spring 150 is formed at the tip of the fork 40.
The coil spring 150 is disposed in a state where the coil spring 150 is compressed by a predetermined amount between the annular flange 134a and the annular flange 134a. The tip of the stopper portion 142 is connected to the eccentric plate 9.
A steel ball 142a is rotatably fitted in order to reduce friction with the fifth ball.

The operation of the torque sensor 100 is based on the same principle as that of a conventionally known torque sensor using a strain gauge. That is, the detected torque, that is, the rotational force of the crankshaft 80, which is converted into an axial force by the drive plate 90 and the eccentric plate 95, acts on the operating rod 140 by the eccentric plate 95. Give or release bending force to
The resistance value of the resistors R1 to R4 is changed, and an electrical output from the bridge W according to the change in the resistance value is extracted. In other words, in this embodiment, in a state where the depressing force of the pedals 81a and 82a does not exceed a predetermined value during manual driving, that is, in a state where no relative movement occurs between the drive gear 56 and the drive plate 90, the deflection plate 95 is Actuating rod 140, coil spring 150 without moving
A maximum bending force is applied to the flexure element 131 via the control unit 300, and the electrical output output from the bridge W in this state is set as a reference value. At this reference value, the control device 300 controls the motor 40 to stop. Further, as in the case of traveling on an uphill or the like, the depressing force of the pedals 81a and 82a increases, and the driving gear 56 and the driving plate 90 move relative to each other in accordance with the depressing force, and the eccentric plate 95 Moves, the bending force of the flexure element 131 applied via the operating rod 140 and the coil spring 150 decreases, and the resistance values of the resistors R1 to R4 of the bridge W change with the decrease in the bending force. An electrical output corresponding to this change is output from the bridge W, and is output from the control device 30 via the amplifier 136 and the like.
0 controls the motor 40.

Next, a speed sensor 160 for detecting the speed of the bicycle A is provided inside the case 20, as shown in FIG.
A well-known magnetic sensor is used, and a detection unit (not shown) of the speed sensor 160 is disposed close to a tooth portion of the drive gear 56, and when the drive gear 56 rotates, each of the drive gears 56 Each time a tooth approaches, a pulse signal is generated from the speed sensor 160 and sent to the control device 300 via a signal line (not shown). The control device 300 calculates the number of pulses per unit time of the pulse signal sent from the speed sensor 160, and determines the vehicle speed based on this value.

The controller 300 controls the output of the electric motor 40 based on the result detected by the torque sensor 100, ie, the rotational force, and the result detected by the speed sensor 160, ie, the vehicle speed. That is, the vehicle speed at each moment during running and the crankshaft 80 at that time
The electric motor 4 is adapted to assist the torque according to the vehicle speed and the torque at the moment according to the torque applied to the motor 4.
0 is controlled.

Next, the rear wheel 1 of the driving force of the electric motor 40 will be described.
2 will be described.

When the vehicle travels on an uphill or the like by manual driving, the depression force of the pedals 81a and 82a increases as described above, and a large relative movement occurs between the drive gear 56 and the drive plate 90. The spherical projection 96a of the slide shaft 96 fixed to the shaft moves upward on the inclined surface 57a of the projection 57 provided on the drive gear 56, and the eccentric plate 95
Moves in a direction away from the drive gear 56. As a result, the operating rod 140 moves following the deflection plate 95 by the urging force of the coil spring 150, and
And the flexure element 131 is restored, the resistance of the resistors R1 to R4 changes, and an electrical output corresponding to the change in the resistance is output from the bridge W. This output and the speed sensor The control device 300 controls the motor 40 based on the momentum based on the vehicle speed calculated according to the output from the motor 160.
Control. Then, when the electric motor 40 rotates, the rotational force is transmitted to the hollow shaft 70 via the speed reduction mechanism 50, and the sprocket 17 attached to the hollow shaft 70,
The power is transmitted to the rear wheel 12 via the chain 18. That is, when the pedals 81a and 82a are depressed, the rotational force of the electric motor 40 is assisted by the rotational force of the electric power transmitted to the crankshaft 80, and the bicycle A runs.

Here, how to assemble the power unit C will be described. The one-way clutch 85 to which the driving plate 90 is attached is prepared as being attached to the crankshaft 80.

The output shaft 4 is attached to the case body 230.
1, a motor 40 to which a gear 51 which is a part of the speed reduction mechanism 50 is mounted, and other gears 52 or bevel gears 55 constituting the speed reduction mechanism 50 are arranged at predetermined positions on the case body 230. And the ball bearing 77
Of the hollow shaft 70 into which the ball bearing 77 is press-fitted into the second bearing mounting portion 233b.
Attach to Further, the printed circuit board 301 on which the torque sensor 100, the speed sensor 160, and the electronic component element 301a are mounted is attached to the case main body 230.

Then, the ridges and ridges 56c of the drive gear 56, which is a part of the reduction mechanism 50, are fitted into the ridges and ridges 72 formed on the hollow shaft 70, and then the crankshaft 80 is connected to the hollow shaft 7
Needle bearings 73a, 73b
Insert through. At the time of this insertion, the compression spring 60 is disposed between the regulating member 58 formed on the drive gear 56 and the compression portion 92 formed on the drive plate 90. Then, the lid case 250 is inserted into the case body 230 in this state through the through hole 252.
The power unit C is assembled by inserting the crankshaft 80 into the case body 230 so as to close the opening of the case main body 230, and then attaching the case body 230 with the screw 255.

Next, the body B of the general-purpose bicycle of the power plant C
First, the crank attached to the crankshaft of the vehicle body B (in the embodiment, the left crank 81
The right and left cranks 82) are removed from the crankshaft, and then the left and right doughs attached to the left and right of the hanger lug 1 are removed from the hanger lug 1 to remove all other parts attached to the hanger lug 1.

Next, the mounting member 310 containing the bearing 315 is attached to the female screw 1b formed on the inner peripheral wall on one end side of the hanger lug 1, and then the regulating member 330 is connected to the through hole 1a.
, And the female screw 1c formed on the inner peripheral wall on the other end side
The mounting member 320 accommodating the bearing 325 is mounted on the mounting member 320.
Next, the hollow shaft 70, which is incorporated in the power plant C and protrudes outward, is inserted from the left side in FIG. 2 and is rotatably supported by the bearings 315 and 325. Attach through. In this state, the axial movement of the hollow shaft 70 is restricted by the locking member 76 and the locking member 75 attached to the hollow shaft 70, and the hollow shaft 70 is mounted on the hanger lug 1. Next, the sprocket 17 is attached to the other end of the hollow shaft 70 via the attachment member 17a.

When the hollow shaft 70 is attached to the hanger lug 1 in this manner, the power unit C is rotatable about the hollow shaft 70 via the ball bearing 77. Then, the power unit C rotatably mounted is rotated about the hollow shaft 70 in the mounting direction, and the case main body 230 is mounted on the frame 6 by fixing means (not shown).

After the power unit C is mounted on the vehicle body B, the left crank 81 and the right crank 82 with the pedals 81a, 82a mounted on the mounting portions 83 and 84 of the crankshaft 80 are mounted by nuts 83b, 84b. Completes the assembly.

Next, the battery device 400 will be described with reference to FIG.
It will be described based on. This battery device 400 has a contact stand 410 and a coupling means 420 accommodated therein, and
4 and a fixed case 430 attached to the battery 4
And a battery storage case 440 serving as a housing which is detachably attached to the loading table 14 through the coupling means 420 while accommodating the storage case 41.

The fixing case 430 is fixed to the receiving table 14 by fixing means (not shown).
The contact base 4 provided inside the fixed case 430
10 includes a pair of power supply connection pins 411 and signal connection pins 412 from the fixed case 430 to the rear wall, that is, the bicycle A.
Is provided so as to protrude rearward from the rear wall 413. The bases of the pair of power supply connection pins 411 and signal connection pins 412 are connected to a pair of lead wires 411a and signal wires 412a inserted into the wiring tube 16. In addition, as shown in FIG.
1a is connected to the start switch 15, and the signal line 412a is connected to the control device 300.
Although not shown, the controller 300 is supplied with power from the battery 441.

The coupling means 420 mounted in the fixed case 430 has a base 422 formed with a shaft 422a rotatably supported by a pair of bearings 421, and is formed integrally with the base 422. Engagement claw 4 at the tip
Engaging body 42 comprising an arm portion 424 on which is formed 23
5 and a spring member (not shown) for urging the arm 424 to rotate clockwise. The distal end of the arm 424 is provided so as to project rearward from a through hole 426 formed in the rear wall. Further, the engaging body 425 is fixed to the fixed case 43.
A key (not shown) is inserted into the key means 427 provided at the position 0, and the key can be rotated in a counterclockwise direction by this key, whereby the engagement with an engagement hole 446 described later can be released. ing. In addition, the fixed case 4
An opening 431 is provided above the cover 30. The opening 431 is attached to the contact base 410 and the coupling means 420, and is attached to the lid 43 by a fixture (not shown).
2 to close the lid.

Next, the battery storage case 440
Is formed in a rectangular box shape, and has an opening 442a which is closed by a lid 442 which can be opened and closed. Further, inside the battery storage case 440, a contact base 445 provided with an opening 444 so that the power supply connection pin 411 and the signal connection pin 412 can be inserted into and removed from the fixed case 430 side, that is, the front wall 443.
Is attached. The front wall 443 has an engagement claw 423 formed on an arm 424 of the engagement body 425.
Is formed with an engagement hole 446 with which the. Although not shown, the power supply connection pin 4
11 and connection pieces that contact the signal connection pins 412, respectively. These connection pieces (not shown) have lead wires 447 and 447 connected to the positive and negative terminals (not shown) of the batteries 441 and 441, respectively.
And a signal line 448 connected to a memory means 450 described later. This battery storage case 4
The battery 441, 44 is provided through the opening 442a.
1 is housed, and is closed by the lid 442 after being housed.

The battery storage case 440 includes:
An output device 460 provided with a memory means 450, a control means comprising a microcomputer, and a display 451 as a display means are provided. The memory means 450 is transmitted from the control device 300 via the signal lines 412a and 448. It stores the amount of exercise done. Further, the output device 460 is connected to the memory unit 4.
The amount of exercise stored in 50 is displayed on the display 451.

The battery storage case 440 is provided with a female connector 470 for charging, and the female connector 470 is connected to a male connector 471 connected to a charger (not shown). A reset device 475 is provided adjacent to the female connector 470. The reset device 475 is provided with a reset switch (not shown) and has a terminal hole 475a. The male connector 471 has the terminal hole 475a. When the reset switch (not shown) is closed by inserting the pin 472 into the terminal hole 475a, the output device 460 is connected to the memory means based on the closing. The contents of 450 are reset or cleared.
Accordingly, when charging the battery 441, the battery storage case 440 is replaced with the fixed case 430.
The male connector 471 provided on a charger (not shown) which is removed from the device and carried to a predetermined place, that is, a place for charging, is connected to the female connector 470 to perform charging.
At this time, the male connector 471 is connected to the female connector 470.
To the terminal hole 475a at this time.
Is inserted, and the reset switch (not shown) is closed, whereby the output device 460 clears the contents of the memory means 450. And
The display of the display 451 is also controlled to be erased since it has already been confirmed.

The setting device 475 is provided with a manual reset switch (not shown) which is manually operated and is provided in parallel with the reset switch. An operation button 478 for operating the manual reset switch is provided near the female connector 470. The output device 460 clears the contents of the memory means 450 when either the manual reset switch or the reset switch is closed.
The manual reset switch is used to store the memory means 45 for measuring the amount of exercise when the driver who drives the bicycle A is different.
This operation is performed to clear the contents of 0.

Next, control of the bicycle A controlled by the control device 300 will be described with reference to a control block diagram shown in FIG. The control device 300 includes a microcomputer, a ROM (Read Only Memory), a RAM (Random Access Memory) and the like. The control device 300 includes a vehicle speed calculation unit 161, a momentum calculation unit 305, and a motor control unit 306.

In the control of the bicycle A, as shown in FIG. 9, the output of the speed sensor 160, that is, the pulse signal is sent to the vehicle speed calculating means 161. The vehicle speed calculating means 161 calculates the vehicle speed based on the pulse signal. The result, that is, the vehicle speed is sent to the exercise amount calculating means 305. At this time, the rotational force according to the pedaling force is detected by the torque sensor 100, and the output from the torque sensor 100 according to the rotational force is transmitted through the A / D converter (not shown) as described above. Sent to 305. Then, the momentum calculating means 305 calculates the momentum based on the vehicle speed according to the output from the speed sensor 160 and the output of the torque sensor 100, that is, the rotational force, and sends the calculated momentum to the memory means 450 of the battery device 400. . Then, the exercise amount is stored in the memory unit 450, and the output device 460 provided in the battery device 400 causes the display unit 451 to display the exercise amount stored in the memory unit 450. Thus, the momentum at that time can be confirmed. Further, based on the output of the momentum calculation means 305, the motor control means 306 controls the motor drive circuit 307 so that the output of the motor 40, that is, the torque, becomes a required torque. As a result, the rotational force according to the pedaling force during traveling and the rotational force according to the speed are supplied from the electric motor 40, that is, the power unit C.

When charging the battery 441, the battery storage case 440 is attached to the fixed case 43.
The male connector 471 for charging is connected to the female connector 470 in order to remove it from 0 and charge it at a predetermined place. With this connection operation, the pin 4 is inserted into the terminal hole 475a.
72 is inserted, the reset switch of the reset device 475 is closed, and based on the closing, the output device 460 clears the momentum stored in the memory means 450. When the operation button 478 is operated, the manual reset switch is closed, and based on this closing, the output device 460 also clears the amount of exercise stored in the memory means 450.

The motor 40 has a start switch 1
5 in response to the switching operation of the battery 4
Power supply / stop is performed from 41.

Next, the bicycle A constructed as described above
The operation at the time of driving will be described. First, in order to supply electric power to the electric motor 40 from the battery (not shown), the start switch 15 is closed and the bicycle is driven. When the vehicle is traveling on a flat ground or a downhill, as described above, the driver's pedaling force is small and the rotational force applied to the drive gear 56 via the crankshaft 80 is small.
The compression spring 60 disposed between the driving gear 56 and the driving plate 90 has a small amount of compression.
The relative movement with zero is small, and the displacement of the deflection plate 95 is also small. Then, with the movement of the eccentric plate 95, the torque sensor 100 outputs a torque output according to the driver's treading force to the momentum calculation means 305 via the operating rod 140 of the torque sensor 100, and the speed sensor 160 From this, an output corresponding to the rotation of the drive gear 56 at this time, that is, a pulse signal is sent to the vehicle speed calculating means 161, and the vehicle speed is calculated by the vehicle speed calculating means 161. And
A momentum is calculated by a momentum calculating means 305 based on the output from the torque sensor 100, ie, the torque, and the output, ie, the vehicle speed, of the vehicle speed detecting means 161. Based on this momentum output, the motor control means 306 controls the motor driving circuit 3
07 to control the electric motor 40. In this case, since the vehicle is traveling on a flat ground or a downhill, no rotational force is supplied from the electric motor 40, that is, the electric motor 40 is controlled to stop. Therefore, since the electric motor 40 is controlled to be in the stopped state, the traveling force, that is, the rotational force is not assisted by the power unit C, and the crankshaft 80 provided via the crankshafts 81, 82 by depressing the pedals 81a, 82a. Is transmitted to the rear wheel 12 via the driving gear 56, the hollow shaft 70, the sprocket 17, and the chain 18 to perform manual driving. The amount of exercise is sent to and stored in the memory means 450, and the amount of exercise in the memory means 450 is displayed on the display 451 under the control of the output device 460, so that the driver can check his / her own exercise amount.

Next, when traveling on an uphill or the like, a large rotational force is required, and as a result, the pedals 81a, 82
As a result, the rotational force applied to the crankshaft 80 and the driving plate 90 increases. That is, the load applied to the hollow shaft 70 that transmits the rotational force to the sprocket 17 that transmits to the rear wheel 12 via the chain 18 becomes large, so that the drive plate 90 and the drive gear 56
Is relatively large, and consequently the deflection plate 95
Is also increased. When the displacement of the deflection plate 95 increases, the bending force of the flexure element 131 of the torque sensor 100 decreases.
4 changes, the output accompanying the change, that is, the output of the rotational force according to the driver's treading force, is output by the torque sensor 10.
0 to the momentum calculation means 305, and an output corresponding to the rotation of the drive gear 56 at this time, that is, a pulse signal is output from the speed sensor 160 to the vehicle speed calculation means 161.
And the vehicle speed is calculated. The output from the torque sensor 100, that is, the rotational force and the vehicle speed calculating means 161
The momentum is calculated by the momentum calculation means 305 based on the output of the vehicle, that is, the vehicle speed, and the motor control means 306 controls the motor drive circuit 307 to control the motor 40 based on the momentum output. In this case, since the vehicle is traveling on an uphill or the like, the hollow shaft 7 is transmitted from the electric motor 40 through the speed reduction mechanism 50.
The electric motor 40 is controlled so that the rotational force is supplied to zero. Therefore, the traveling is performed with the rotational force of the electric motor 40 assisted by the rotational force due to human power, that is, the rotational force due to the stepping force of the driver, and the traveling is easily performed even when a large rotational force such as an uphill is required. The amount of exercise is sent to and stored in the memory means 450, and the amount of exercise in the memory means 450 is displayed on the display 451 under the control of the output device 460, so that the driver can check his / her own exercise amount.

As described above, the torque of the bicycle A is detected by the torque sensor 100 while the bicycle A is running, and the vehicle speed at this time is detected by the speed sensor 16.
0 is calculated based on the detection result, and the amount of exercise is calculated based on the rotational force and the vehicle speed, and this is displayed on the display 451. Therefore, when the bicycle with the auxiliary power device is used as a health device, It is very effective, and the torque sensor 100 and the speed sensor 160
Since the conventional bicycle with the auxiliary power unit can be used in common, the structure can be simplified and the cost can be reduced. In addition, since the torque sensor 100 and the speed sensor 160 are housed in the case 20 of the power plant C, it is possible to prevent a decrease in accuracy due to contamination by dust or the like or a breakage due to external force as in the related art.

A start switch 15 as a switching means
By supplying and stopping the electric power to the electric motor 40, the supply and the stop of the rotational force from the power unit C including the electric motor 40 are selectively switched, so that the bicycle A is supplied with the auxiliary power while supplying the auxiliary power. A running mode and a running mode in which auxiliary power is not supplied, that is, a manual running mode that functions as a healthy device can be selectively used. In the case of a manual running mode that functions as a health device, the amount of exercise is displayed on the display 451. Therefore, the driver can check his / her own exercise amount.

Also, a memory means 450 is provided in the battery storage case 440 of the battery device 400, and since the amount of exercise is stored in the memory means 450, when the battery storage case 440 is carried to the charging place when charging the battery. However, you can check the amount of exercise at this charging place. Therefore, when the operator forgets to check the display, as in the case where the indicator is provided on the vehicle body B, it is possible to eliminate the troublesome task of checking the display at a place where the vehicle body B is present. However, if the display 451 is provided in the battery storage case 440 of the battery device 400 and the amount of exercise can be confirmed at the charging place as in the above-described embodiment, the amount of exercise can be simply displayed. It may be.

When the male connector 471 is connected to the female connector 470 during charging, the reset switch provided on the reset device 475 is closed by the pin 472 at this time, and the contents stored in the memory means 450 are automatically cleared. Therefore, it is possible to reliably prevent forgetting to clear the contents of the memory means 450 at the next operation. When the same driver uses the same bicycle A, the amount of exercise up to that time can be confirmed at the time of charging.

Since the reset device 475 is provided with a manual reset switch separately from the reset switch, when a different driver drives the same bicycle A, the data is stored in the memory means 450 by operating the operation button 478. In addition, it is possible to clear the exercise amount up to that time and to memorize only the own exercise amount.

In the above-described embodiment, both the power assisted driving mode in which the bicycle A is supplied with the auxiliary power and the driving mode in which the bicycle A is not supplied with the auxiliary power, that is, the human-powered driving mode in which the bicycle A functions as a healthy device, is used. The amount of exercise was displayed on the display 451. However, this is because it is necessary to confirm the amount of exercise more when the vehicle is running without receiving the auxiliary power, that is, in a human-powered driving mode in which the device functions as a health device. It may be displayed only in this mode. In this case, the output device 460 may be set to the operating state when the start switch 15 is opened, and the output device 460 may be set to the non-operating state when the start switch 15 is closed. The power consumed by the device 460 can be saved.

In the above-described embodiment, the switching means for switching between the power assisted driving mode and the manual driving mode, that is, the switching means for stopping the supply of the rotational force from the power unit C is provided by the start switch 15.
Although this may be constituted by a clutch mechanism for releasing the meshing of any two adjacent gears among the gears constituting the speed reduction mechanism 50, the start switch 15 as in the above embodiment is used. In this case, there is an advantage that the configuration is simplified and a failure or the like hardly occurs.

Further, in the above-described embodiment, the display 451 for displaying the momentum stored in the memory means 450 is provided in the battery storage case 440. However, the display 451 is not provided in the battery storage case 440. The charger may be provided with an indicator so that the indicator is displayed when a heavy electric current is applied. In such a case, the indicator may be damaged due to vibration during traveling or due to dust or the like. The battery 441 can prevent dirt and the like.
This has the advantage of saving power.

[0077]

According to the first aspect of the present invention, a bicycle with an auxiliary power unit can be provided with a function of using as a health device, and the structure can be simplified to improve accuracy. It is effective.

According to a second aspect of the present invention, in addition to the effects of the first aspect of the present invention, there is provided a switching means for selectively switching between supplying and stopping the supply of torque from the auxiliary power unit to the crankshaft, The switching of the switching means allows the user to switch between a power assisted driving mode in which driving can be easily performed with the assistance of the rotational force from the auxiliary power device and a manual driving mode using only human power mainly as a health device. The exercise amount calculated by the exercise amount calculation means is displayed on the display means at least when the driving mode is set to the human-powered driving mode by switching the switching means. The effect is that the amount of exercise can be confirmed.

According to a third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, the contents stored in the memory means for storing the amount of exercise provided in the battery device are stored in the vehicle body. When the battery is recharged, the amount of exercise can be displayed on the display at the charging place and confirmed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an entire embodiment of a bicycle with an auxiliary power device according to the present invention.

FIG. 2 is a sectional view of the auxiliary power unit according to the embodiment.

FIG. 3 is a side view of a part of the above embodiment, on the left crank side of the auxiliary power unit.

FIG. 4 is a view of the auxiliary power unit according to the embodiment as viewed from the front of a vehicle body.

FIG. 5 is a partial cross-sectional view showing a relationship among a drive gear, a deflection plate, and a drive plate according to the embodiment.

FIG. 6 is a sectional view of the torque sensor according to the embodiment.

FIG. 7 is an electric circuit diagram of the torque sensor.

FIG. 8 is an exploded perspective view of the battery device according to the embodiment.

FIG. 9 is a control block diagram of the embodiment.

[Explanation of symbols]

 A Bicycle with auxiliary power device B Bicycle main body (body) C Auxiliary power device 15 Start switch (switching means) 20 Case (storage case) 40 Electric motor (part of auxiliary power device) 50 Power transmission means (part of auxiliary power device) ) 70 Hollow shaft (part of auxiliary power unit) 80 Crankshaft (part of auxiliary power unit) 81 Left crank 82 Right crank 100 Torque sensor (Momentum detection means) 160 Speed sensor 161 Vehicle speed calculation means 300 Control device 305 Momentum calculation Means 306 Motor control means 307 Motor drive circuit 400 Battery device 440 Battery storage case (storage case) 441 Battery 450 Memory means 451 Display (display means) 460 Output device (control means) 475 Reset device

Claims (3)

[Claims] 1. A battery device comprising a vehicle body, a battery, and a housing for storing the battery, the battery device being detachably mounted on the vehicle body, a storage case, an electric motor mounted on the storage case, and a rotational force of the electric motor. An auxiliary power device attached to the vehicle body, the auxiliary power device being comprised of a speed reduction mechanism that reduces the speed of the vehicle, a hollow shaft rotatably provided in the storage case, and receiving a rotational force from the auxiliary power device, and being rotatable within the hollow shaft. , A rotational force detecting means for detecting a rotational force due to a pedaling force transmitted to the crankshaft via the crank, a speed sensor, and a vehicle speed calculating means for calculating a vehicle speed based on an output of the speed sensor A motor control for controlling the auxiliary power unit to supply a rotational force to the hollow shaft in accordance with the outputs of the rotational force detecting means and the vehicle speed calculating means A step, a momentum calculating means for calculating a momentum based on a detection result of the rotational force detecting means and a calculation result of the vehicle speed calculating means, and a display means, wherein the momentum calculated by the momentum calculating means is displayed on the display means. A bicycle with an auxiliary power unit, which is displayed. 2. A switching means for selectively switching between supplying and stopping the supply of torque from the auxiliary power unit to the hollow shaft, and stopping the supply of torque from the auxiliary power unit by switching at least the switching means. 2. The bicycle with an auxiliary power device according to claim 1, wherein the exercise amount calculated by the exercise amount calculation means is displayed on the display means when the operation is performed. 3. The bicycle with an auxiliary power unit according to claim 1, wherein the battery device is provided with a memory for storing the exercise amount calculated by the exercise amount calculation means.