JPH1059243A - Power source device for motor-driven hybrid bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an exclusive carrier supporting a battery unit, and dispose the battery unit without impiring the design of a frame and the nimble feeling of a bicycle. SOLUTION: The motor driven hybrid bicycle is equipped with a frame 2 provided with paired seat stays 7a and 7b which are extended obliquely downward to the rear from the upper part of a seat tube 6 through both the right and left sides of a rear wheel 15, an electric motor 40 which is supported by the frame 2, and gives auxiliary power when the bicycle is manually driven while pedals are being stepped, and with a battery unit 44 which is supported by the frame 2, and feeds electricity to the electric motor 40. The battery unit 44 is provided with a battery case 47 in which a plurality of dry cells are housed. The battery case 47 is provided with a first and a second cylindrical case part 75 and 76, which are divided into a right and a left side so as to be disposed while the rear wheel is being held in between, and the first and second case parts are disposed while being laid along the seat stays 7a and 7b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hybrid bicycle in which the power of an electric motor is added as auxiliary power when the vehicle is driven manually by depressing a pedal.
Particularly, the present invention relates to a structure of a battery unit serving as a power supply device of the electric motor.

[0002]

2. Description of the Related Art In an electric hybrid bicycle equipped with a power assist unit having an electric motor, the power of the electric motor is added to the drive path of the rear wheel at the same time as the pedal is depressed. Therefore, even when the vehicle has a steep uphill slope or a strong headwind, there is an advantage that the pedaling force is small and the vehicle can travel lightly.

[0003] This type of electric hybrid bicycle is equipped with a battery unit serving as a power source for the electric motor. The battery unit includes a plurality of rechargeable dry batteries and a battery case that houses the dry batteries. The conventional battery unit is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-156362.
It is mounted on a carrier arranged above the rear wheel, or mounted along a down tube that extends obliquely downward and backward from the head pipe as seen in Japanese Patent Application Laid-Open No. 7-329857.

[0004]

However, when the battery unit is mounted on the carrier, a dedicated carrier must be provided as standard. Therefore, there is a problem that the number of parts is increased by the amount of the carrier, resulting in an increase in cost and an increase in weight.

In addition, since the battery unit is relatively heavy, the carrier supporting the battery unit needs to have a rigid and rigid structure, and the carrier itself becomes large. For this reason, the carrier and the battery unit become more conspicuous, and the lightness peculiar to the bicycle is lost. In addition, since the heavy carrier and the battery unit are located above the rear wheel, the position of the center of gravity is increased.

When the battery unit is mounted along the down tube, the battery unit is thicker and larger than the down tube.
This thick battery unit is located between the left and right pedals. For this reason, when depressing the pedal, there is a possibility that the foot placed on the pedal may interfere with the battery unit.

In addition, when the occupant is seated on the saddle, a thick and large battery unit is located between the two legs, which tends to cause discomfort. As a result, the original light image of the bicycle is lost, leaving a problem in appearance.

The present invention has been made in view of such circumstances, and an object of the present invention is to eliminate the need for a dedicated carrier for supporting the battery unit, and to reduce the battery unit without impairing the frame design and the lightness inherent in the bicycle. An object of the present invention is to provide a power supply device for an electric hybrid bicycle that can be arranged.

[0009]

In order to achieve the above object, an electric hybrid bicycle according to claim 1 is provided.
A frame having: a seat tube disposed between the front wheel and the rear wheel in an upright posture; and a pair of seat stays extending obliquely downward from the upper portion of the seat tube through the left and right sides of the rear wheel. A power assist unit including an electric motor for applying auxiliary power when the vehicle is driven manually by depressing a pedal; and a battery unit supported by the frame and serving as a power source for the electric motor. I have. The battery unit has a battery case for accommodating a plurality of secondary batteries, and the battery case is formed of cylindrical first and second cases arranged right and left across the rear wheel. And the first and second case portions are arranged along the seat stay.

According to this configuration, the battery unit can be supported using the seat stay as a strength member of the frame. Therefore, a dedicated carrier for supporting the battery unit becomes unnecessary.

[0011] Further, since the battery case for accommodating the secondary battery is divided into the first and second case portions, each case portion becomes small. Therefore, the first and second case portions can be compactly arranged along the seat stay, and a sense of unity between the frame and the battery case can be obtained. In addition, since the battery case is located behind the seat tube, the battery case does not enter the field of view of the occupant. Therefore, there is no uncomfortable feeling during riding, and the battery case can be arranged without impairing the appearance of the frame or the original light image of the bicycle in combination with the reduction in the size of the first and second case portions. it can.

According to a second aspect, the secondary battery according to the first aspect has a columnar shape and is connected in series with each other, and these secondary batteries are provided in the first and second case portions. Forming a pair of battery rows arranged in a row so that their axes are along the seat stay,
These battery arrays are characterized in that they are arranged one above the other.

According to this configuration, the total length of the battery array in the direction along the seat stay is shorter than when a plurality of secondary batteries are arranged in a line in the radial direction in an upright posture. For this reason, the first and second case portions of the battery case can be reduced in size.

When a plurality of rechargeable batteries are arranged in a line in an upright position, the positive terminal and the negative terminal of the battery column are spaced apart from each other in the direction of arrangement of the battery columns. Therefore, it is necessary to route a lead wire connected to one of the terminals along the arrangement direction of the secondary batteries. However, if a pair of battery rows connected in series to each other are arranged vertically as described above, the positive terminal and the negative terminal of the battery unit can be disposed adjacent to each other at one end of the battery row. . Therefore, it is not necessary to arrange the lead wires inside the battery case along the arrangement direction of the battery row, and the internal structure of the battery case can be simplified.

According to a third aspect, in the second aspect, the frame has a side stand on one side in a vehicle width direction, and a first case portion and a second case portion of the battery case. The number of the secondary batteries housed in the case part differs from each other, and the number of the secondary batteries housed in the first case part located on the side stand side is the second case part. Is set to be smaller than the number of secondary batteries stored in the battery.

According to this configuration, the weight of the first case portion located on the side stand side is smaller than the weight of the second case portion opposite to the side stand across the rear wheel. The weight can be offset based on the weight difference between the first case portion and the second case portion. Therefore, the weight balance of the frame including the side stand in the vehicle width direction can be equalized using the battery unit.

According to a fourth aspect, the front ends of the first and second case portions according to the first or third aspect are connected to each other via a connecting portion.

According to this configuration, since the first and second case portions are integrated, the first and second case portions can be simultaneously removed from the frame or attached to the frame. Therefore, workability when attaching and detaching the battery unit to and from the frame is improved.

According to a fifth aspect of the present invention, the seat stay according to the fourth aspect has a battery supporting portion for supporting a connecting portion of the battery case.
It is characterized in that it is provided with a lock device for locking the connection portion of the battery case in a non-removable manner.

According to this configuration, the battery unit includes:
The first and second case portions are locked in a posture along the seat stay. For this reason, it is possible to prevent the battery unit from falling off during traveling, and also prevent the battery unit from being stolen.

According to a sixth aspect of the present invention, the connecting portion according to the fourth aspect is a transport handle having a charging outlet connected to the secondary battery and a cover for covering the charging outlet. And the handle is rotatable between a first position in which the cover covers the charging outlet and a second position in which the cover is detached from the charging outlet. And is supported by the connecting portion.

According to this configuration, if the handle is turned to the second position, the cover part moves away from the charging outlet, and the charging outlet can be exposed. Therefore, the charging operation can be performed while the battery unit is mounted on the frame. In addition, since the handle itself also has a function of covering the charging outlet, a dedicated cover for the charging outlet is not required, and it is possible to prevent foreign substances from adhering to the charging outlet and to prevent mischief.

According to a seventh aspect, the electric motor according to the first aspect is arranged between the seat tube and the rear wheel in an upright posture along the seat tube. Features.

According to this configuration, since the electric motor is positioned behind the seat tube, the electric motor does not enter the occupant's view while riding. Therefore, no discomfort occurs during riding, and the image of the bicycle does not deteriorate.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, the electric hybrid bicycle indicated by reference numeral 1 has a frame 2. The frame 2 includes a head pipe 3, one top tube 4 connected to the head pipe 3, and a seat tube 6 connected to a rear end of the top tube 4 via a rear lug 5.
And a pair of seat stays 7a connected to the rear lug 5,
7b, and a pair of chain stays 8a, 8b arranged below the seat stays 7a, 7b.

The head pipe 3 is located at the front end of the frame 2. A front wheel 10 is supported on the head pipe 3 via a front fork 9. The top tube 4 extends straight from the lower part of the head pipe 3 obliquely downward and rearward. The rear end of the top tube 4 is brazed to a rear lug 5.

The seat tube 6 is arranged in a vertical position perpendicular to the top tube 4. Therefore, the seat tube 6 is inclined rearward as it goes upward, and a saddle 12 is supported at an upper end of the seat tube 6 via a seat post 11.

Each of the seat stays 7a and 7b is formed of a pipe material having an elliptical cross section, and the pipe material is arranged in a posture in which the long axis is set vertically. Seat stay 7
The front ends of a and 7b are brazed to the rear lug 5. The seat stays 7a and 7b extend linearly obliquely downward and rearward from the rear lug 5, and are located on an extension of the top tube 4 when the frame 2 is viewed from the side. Therefore, the frame 2 includes the seat tube 6, the top tube 4, and the seat stays 7a, 7
It has an X-shaped basic skeleton constituted by b.

As shown in FIG. 3, the seat stays 7a, 7
b are arranged behind the rear lug 5 so as to be separated from each other in the vehicle width direction. Rear wheel brackets 14a, 14b are brazed to the rear ends of the seat stays 7a, 7b, respectively. The rear wheel brackets 14a and 14b are arranged parallel to each other in a state of being separated in the vehicle width direction.
A hub 16 of the rear wheel 15 is rotatably supported between the rear wheel brackets 14a and 14b via an axle 17. Therefore, the seat stays 7a and 7b extend obliquely downward and rearward from the upper portion of the seat tube 6 through the left and right sides of the rear wheel 15. The hub 1 of the rear wheel 15
A freewheel 18 is attached to the right side surface of the unit 6.

As shown in FIGS. 1 and 2, the chain stays 8a and 8b are arranged substantially horizontally through the left and right sides of the rear wheel 15. The rear ends of the chain stays 8a, 8b
It is brazed to the rear wheel brackets 14a, 14b. The front ends of the chain stays 8a and 8b are guided between the lower end of the seat tube 6 and the front end of the rear wheel 15. At the front ends of the chain stays 8a and 8b, there are formed connecting portions 19 which are crushed flat along the width direction of the frame 2.

The rear wheel bracket 14a of the frame 2 has
A side stand 22 is supported via a stand bracket 21. The side stand 22 is used for parking a bicycle, and is located on the left side of the rear wheel 15.

As shown in FIG. 2, a bracket 25 is attached to the lower end of the seat tube 6. The bracket 25 supports a power assist unit 26. The power assist unit 26 is disposed between the seat tube 6 and the rear wheel 15. The power assist unit 26 has a hollow housing 27. The housing 27 is supported by the bracket 25 and the connecting portion 19 between the chain stays 8a and 8b.

That is, a plurality of bosses 28 are formed on the front and rear portions of the housing 27, and the bracket 25 and the connecting portions 19 of the chain stays 8a and 8b are connected to these bosses 28 via bolts 29. Tightened and fixed. The connecting portion 19 is butted against the boss portion 28 from the side. A bolt 29 for fixing the connecting portion 19 to the boss portion 28 is horizontally disposed along the vehicle width direction. For this reason, the housing 27 of the power assist unit 26 includes the seat tube 6 and the chain stay 8.
a, 8b, and the housing 27 also functions as the frame 2.

The housing 27 incorporates a manual drive system and an electric drive system. The human-powered drive system has a configuration similar to that of a conventionally known one, and has a crankshaft 31 extending in the vehicle width direction. At both left and right ends of the crankshaft 31,
Cranks 33 each having a pedal 32 are attached.

A planetary gear type speed increaser is supported on the outer periphery of the crankshaft 31 via a one-way clutch. The output end of this gearbox is connected to the drive sprocket shaft. The drive sprocket shaft has a drive sprocket 35 as shown in FIG. A chain 36 is stretched between the drive sprocket 35 and the freewheel 18 of the rear wheel 15.

Therefore, when the occupant depresses the pedal 32, the crankshaft 31 is rotated via the crank 33. The rotation of the crankshaft 31 is transmitted from the one-way clutch to the drive sprocket 35 via the gearbox and the drive sprocket shaft, and is transmitted to the rear wheel 15 via the chain 36. As a result, similarly to a normal bicycle, it is possible to run manually with only the force of depressing the pedal 32.

The electric drive system has an electric motor 40. The electric motor 40 is connected to the upper end of the housing 27, and is arranged between the seat tube 6 and the rear wheel 15 in an upright position along the seat tube 6, as shown in FIG. Have been.

The electric motor 40 is linked to the drive sprocket shaft via a planetary roller type primary speed reducer, a one-way clutch and a secondary speed reducer. Electric motor 4
0 is driven only when the occupant depresses the pedal 32. The power from the electric motor 40 is transmitted to the drive sprocket shaft via the primary speed reducer, the one-way clutch and the secondary speed reducer, and this power is added to the force for depressing the pedal 32 as auxiliary power. Has become.

In this case, the power from the electric motor 40 is
It is controlled by the controller 41. That is, the controller 41 calculates a power corresponding to the depressing force of the pedal 32 based on a signal indicating the depressing force of the pedal 32 and a signal indicating the traveling speed, and based on the calculation result, the electric motor 40 Is controlled so as to be substantially proportional to the depression force of the pedal 32. The auxiliary power applied from the electric motor 40 to the manual drive system gradually decreases as the traveling speed increases, and becomes zero when the traveling speed reaches a predetermined value (24 km / h). Stipulated.

The controller 41 is supported behind the housing 27.
The periphery of the power assist unit 26 is covered and covered by a cover 42 as shown in FIG.

As shown in FIGS. 1 to 3, a battery unit 44 is detachably supported by the seat stays 7a and 7b of the frame 2. The battery unit 44 functions as a power supply for the electric motor 40. The battery unit 44 includes first and second battery packs 45 and 46 and a battery case 4 made of synthetic resin for housing the battery packs 45 and 46.
7 is provided.

As shown in FIGS. 4 and 5, each of the first and second battery packs 45 and 46 has a plurality of single-type rechargeable dry cells 48, respectively. These dry batteries 48
Are covered with a heat-shrinkable outer tube 49 and packaged as one module.

The number of dry batteries 48 differs between the first battery pack 45 and the second battery pack 46. Specifically, the first battery pack 45 has nine dry batteries 48, and the second battery pack 46
It has two dry batteries 48. Therefore, the first battery pack 45 is lighter than the second battery pack 46 because the number of the dry batteries 48 is small.

As shown in FIG. 5A, the first and second
Battery packs 45 and 46 have an even number of dry cells 48
Have a pair of battery rows 48a, 48b arranged coaxially with their axes lying horizontally, and these battery rows 48a, 48b are vertically stacked.
A single dry battery 48 is disposed at one end along the longitudinal direction of the battery rows 48a and 48b in a vertically installed posture. Therefore, the first and second battery packs 45,
46 has an elongated rectangular parallelepiped shape.

As shown in FIG. 5B, the battery rows 48a,
48b, the anode terminals 50 of the adjacent dry cells 48
a and the cathode terminal 50b face each other. These terminals 50a and 50b are electrically connected via connection pieces 51. The connection piece 51 has a first end spot-welded to the anode terminal 50a, and a second end spot-welded to the cathode terminal 50b. Connection piece 51
Is bent into a U-shape after the above-mentioned welding, and by this bending, a plurality of dry cells 48 are arranged in a line and these dry cells 48 are connected in series. A spacer 52 having electrical insulation is interposed between the adjacent dry cells 48, and the presence of the spacer 52 prevents the second end of the connection piece 51 from contacting the anode terminal 50a. ing.

First and second battery packs 45, 4
The six battery rows 48a and 48b are connected in series via one dry battery 48 arranged vertically. Therefore, the odd number of dry batteries 48 constituting the first and second battery packs 45 and 46 are connected in series with each other.

As shown in FIGS. 4 and 5A, the first battery pack 45 includes a positive electrode terminal plate 53a and a negative electrode terminal plate 5a.
3b. The second battery pack 46 includes +
It has a pole terminal plate 54a and a negative pole terminal plate 54b. These positive electrode terminal plates 53a and 53b and negative electrode terminal plate 54
a and 54b are vertically arranged at the end opposite to the dry battery 48 arranged vertically.

The positive electrode terminal plate 5 of the first battery pack 45
3a is connected to the negative terminal plate 54b of the second battery pack 46 via the first lead wire 55. For this reason, the first battery pack 45 and the second battery pack 46 are connected in series with each other, and if the rated voltage of each dry battery 48 is 1.2 V, the rated voltage of the battery unit 44 Is 24.0 V.

As shown in FIGS. 4 and 5, the battery unit 44 has a first connector 56 for charging and a second connector 57 for discharging. The positive terminal 56a of the first connector 56 is connected to the positive terminal plate 54a of the second battery pack 46 via the second lead wire 58. These positive terminal 56a and positive terminal plate 54a
Between the blade type fuse 59 and the thermal fuse 6.
0 is interposed in series. The thermal fuse 60 is integrated with the second battery pack 46. First
The negative electrode terminal 56b of the connector 56 is connected to the third lead wire 6
1 through the negative electrode terminal plate 53 of the first battery pack 45
b. A temperature fuse 62 is interposed between the negative pole terminal 56b and the negative pole terminal plate 53b. The thermal fuse 62 is connected to the first battery pack 4
5 is integrated. The above blade type fuse 59
Is configured such that the positive terminal 56a and the negative terminal 56b are short-circuited due to mischief or the like, and when a large current exceeding a specified value flows therein, the terminal is blown and the charging circuit is automatically turned off.

The first connector 56 has a pair of contact terminals 63a and 63b. These contact terminals 63
a and 63b are connected to a thermistor 66 via a fourth lead wire 65. The thermistor 66 is for detecting the temperature of the charging circuit, and is integrated with the second battery pack 46.

The positive terminal 57a of the second connector 57
Is connected to the positive electrode terminal plate 54a of the second battery pack 46 via the fifth lead wire 67. The negative terminal 57b of the second connector 57 is connected to the negative terminal plate 53b of the first battery pack 45 via the sixth lead wire 68. Further, the second connector 57 has a blade type fuse 69, and this fuse 69 is connected to the positive terminal 57a.

As shown in FIG. 3, the battery case 4
7 has a first case portion 75 that houses the first battery pack 45 and a second case portion 76 that houses the second battery pack 46. The first and second case portions 75 and 76 are respectively provided with seat stays 7a and 7a.
b has a hollow cylindrical shape having a length substantially covering the entire length. The first case portion 75 is disposed along the upper surface of the left seat stay 7a, and the second case portion 76 is disposed along the upper surface of the right seat stay 7b. For this reason, the first and second case portions 75 and 76 are disposed so as to be divided right and left with the rear wheel 15 interposed therebetween. When the electric hybrid bicycle 1 is viewed from the side, the seat stays 7a and 7b are provided. It is inclined backward and downward along.

In the case of the present embodiment, the first battery pack 45 is lighter in weight than the second battery pack 46, so that the first case part 75 including these battery packs 45, 46 With the case 76 of the second,
The weight is unequal to the left and right, and the light first case portion 75 is located on the side stand 22 side.

At the rear ends of the first and second case portions 75 and 76, positioning projections 75a and 76a are integrally formed. These convex portions 75a, 76a are projected rearward of the first and second case portions 75, 76,
The width dimension is set smaller than the width dimensions of the first and second case portions 75 and 76.

The front ends of the first and second case portions 75 and 76 are connected to each other via a connecting portion 77. The connecting portion 77 has a hollow box shape as shown in FIGS. 6 and 7, and is connected to the inside of the first and second case portions 75 and 76. The connecting portion 77 is provided on the upper surface of the seat stays 7a, 7b.
Is located immediately after.

The connecting portion 77 includes a charging outlet 80,
And a relay connector 81. Charging outlet 8
0 is connected to the first connector 56 of the battery packs 45 and 46. The charging connector 80 is exposed at an upper portion on the left side surface of the connecting portion 77. The relay connector 81 is connected to the second connector 57 of the battery packs 45 and 46. This relay connector 81
It is exposed on the bottom surface of the connecting portion 77.

The connecting portion 77 includes a positioning concave portion 82,
An engagement recess 83 for locking is provided. The recess 82
It is formed on the bottom surface of the connecting portion 77 and is located in front of the relay connector 81. The engagement concave portion 83 is located at a lower part of the front surface of the connecting portion 77 and is opened forward of the connecting portion 77.

The connecting portion 77 of the battery unit 44
Is attached with a handle 84 for transportation. As shown in FIG. 7, the handle 84 has a pair of left and right arms 85a and 85b, and a grip 85c straddling the tips of the arms 85a and 85b. Arm part 85
One ends of a and 85b are rotatably supported on left and right side surfaces of the connecting portion 77 via pins 86. Therefore, the handle 84 has an angle of approximately 90 ° between the first position where the grip portion 85c is located in front of the coupling portion 77 and the second position where the grip portion 85c is located above the coupling portion 77. When the handle 84 is turned to the first position, a gap 87 is formed between the grip portion 85c and the front surface of the connecting portion 77.

As shown in FIG. 2, the arm portion 85a located on the left side has an integral cover portion 88. The cover portion 88 advances to the side of the charging outlet 80 when the handle 84 is rotated to the first position, and covers the charging outlet 80 from the side. When the handle 84 is rotated to the second position, the cover 88 is detached above the charging outlet 80, and the charging outlet 80 is exposed to the side.

As shown in FIG. 6, the seat stay 7
Brackets 90 are attached to the front ends of a and 7b. The bracket 90 straddles between the seat stays 7a and 7b. On the upper surface of the bracket 90, a battery holder 91 made of a synthetic resin as a battery support portion is provided.
Are bolted. The battery holder 91 includes a holder body 92 disposed between the seat stays 7a and 7b.
And a cylinder holding portion 93 connected to the front end of the holder body 92.

As shown in FIG. 8, the holder main body 92 has an installation surface 94 facing the bottom surface of the connecting portion 77.
The installation surface 94 extends along the inclination direction of the seat tubes 7a and 7b. On the installation surface 94, a connection plug 95 having a plurality of plug blades 95a, a guide protrusion 96 for positioning, and a pair of cylindrical rubber dampers 109 are arranged. Plug blade 95a and guide protrusion 96
Protrudes upward from the installation surface 94, and the plug blade 95a and the guide projection 96 are arranged apart from each other in the front-rear direction.

The connection plug 95 is electrically connected to the electric motor 40 of the power assist unit 26 and the controller 41 via the main switch 97 shown in FIG. When the connecting portion 77 of the battery unit 44 is placed on the installation surface 94, the plug blade 95a of the connecting plug 95 is detachably fitted to the relay connector 81 on the bottom surface of the connecting portion 77. The battery unit 44 and the power assist unit 26 are electrically connected.

The guide projection 96 is provided on the battery unit 44.
When the connecting portion 77 is placed on the installation surface 94 of the connecting portion 77, the connecting portion 77 is detachably fitted into the concave portion 82 on the bottom surface of the connecting portion 77. By this fitting, the positioning of the connecting portion 77 in the front-back and left-right directions with respect to the installation surface 94 is performed.

The rubber damper 109 is disposed at a position corresponding to the lower surface of the front end of the first and second case portions 75 and 76. Therefore, when the connecting portion 77 of the battery unit 44 is placed on the installation surface 94, the rubber damper 109
The mounting surface 94 and the first and second case portions 75 and 76
It is compressed between and.

The cylinder holder 93 of the battery holder 91 extends upward from the front end of the holder main body 92. The cylinder holding portion 93 is formed to have such a size as to enter a gap 87 between the grip portion 85c of the handle 84 and the front surface of the connecting portion 77. This cylinder holding part 9
3 has a guide surface 100 facing the front surface of the connecting portion 77.

A lock cylinder 101 as a lock device is housed inside the cylinder holding section 93. The lock cylinder 101 is arranged in a vertical posture, and a support stay 102 that projects radially is formed on the outer peripheral surface of the lock cylinder 101. The support stay 102 is interposed between bosses 103a and 103b extending from the top and bottom surfaces of the cylinder holding portion 93, and is fixed to the bosses 103a and 103b via bolts 104.

The lock cylinder 101 is connected to the connecting portion 77
Has a locking claw 105 corresponding to the engaging concave portion 83. The lock claw 105 is movable between a first position protruding from the guide surface 100 and a second position retracted from the guide surface 100 into the cylinder holding portion 93. The lock claw 105 is constantly urged toward the first position, and can freely move from the first position to the second position.

For this reason, when the connecting portion 77 of the battery unit 44 is placed on the installation surface 94, first, the connecting portion 7
7 is in contact with the tip of the lock claw 105, and the lock claw 105 is brought into contact with the first end by the corner.
From the position to the second position. Connection part 7
When the engaging concave portion 83 on the front surface of the lock 7 faces the lock claw 105, the pressing of the lock claw 105 by the connecting portion 77 is released, and the lock claw 105 protrudes from the second position toward the first position. With this projection, the lock claw 105 is fitted into the engagement concave portion 83, and the connecting portion 77 is attached to the installation surface 94.
It is locked so that it cannot be removed from.

The lock cylinder 101 has a key hole 107 on the upper surface through which a lock key 106 is inserted and removed. The key hole 107 is exposed on the upper surface of the cylinder holding portion 93. The lock key 106 is the lock claw 1
05 and the lock claw 1
05 is rotatable over a lock release position for forcibly moving it from the first position to the second position.

When the lock key 106 is pulled out with the lock claw 105 fitted in the engagement recess 83 as described above, the engagement between the lock claw 105 and the engagement recess 83 is maintained, and the battery unit 44 is locked to the mounting surface 94 of the battery holder 91. Lock key 1
When the 06 is rotated to the unlock position, the lock pawl 105
Is forcibly pulled out from the engagement recess 83, and the lock of the battery unit 44 is released.

As shown in FIGS. 2 and 3, rear wheel brackets 14a, 14a of the rear ends of the seat stays 7a, 7b are provided.
b, battery receivers 110a, 11 made of synthetic resin, respectively.
0b is attached. Battery receiver 110a, 1
10b has a box shape opened toward the front,
Projecting portions 75a, 76a at the rear end of the battery case 47 are detachably fitted to the battery receivers 110a, 110b.

The battery receivers 110a and 110b are integrally provided with a support stay 111 extending downward. The support stay 111 is fixed to the side surfaces of the rear wheel brackets 14a and 14b via screws 112. By this fixing, the battery receivers 110a and 110b are held at the rear ends of the seat stays 7a and 7b.

Further, as shown in FIG.
10a and 110b integrally have a guide wall 114 extending forward. The guide wall 114 is a seat stay 7
It is located on the inner side in the vehicle width direction than a and 7b, and the distance from the center line C extending in the front-rear direction of the frame 2 is uniformly determined. The guide walls 114 hold the convex portions 75a and 76a of the battery case 47 to
0a, 110b, the battery case 47 slidably contacts the opposing inner surfaces of the first and second case portions 75, 76 of the battery case 47.
The rear ends of the first and second case portions 75 and 76 are positioned in the vehicle width direction.

In the electric hybrid bicycle 1 having such a configuration, the battery unit 44 is connected to the seat stay 7.
The procedure for mounting the components a and b will be described.

First, the battery unit 44 is dropped from above the rear wheel 15 toward the seat stays 7a, 7b.
The first and second case portions 75 and 76 are located on the left and right sides of the rear wheel 15. Then, the convex portions 75a, 76a at the rear ends of the first and second case portions 75, 76 are fitted into the battery receivers 110a, 110b, and the seat stays 7
a and 7b for the first and second case portions 75 and 76
Determine the position of the rear end.

Next, the battery unit 44 is rotated downward with the fitting portions of the convex portions 75a, 76a and the battery receivers 110a, 110b as fulcrums, and the connecting portion 77 at the front end of the battery case 47 is mounted on the battery holder 91. Place on surface 94. As a result, the guide projections 9 on the installation surface 94 are
6 fits into the concave portion 82 of the connecting portion 77, and the positioning of the connecting portion 77 and the installation surface 94 is performed. With it,
The plug blade 95a on the installation surface 94 is inserted into the relay connector 81, and the battery unit 44 and the power assist unit 26 are electrically connected.

When the connecting portion 77 is placed on the installation surface 94, the lock claw 105 of the lock cylinder 101 automatically engages with the engaging recess 83 on the front surface of the connecting portion 77. When the lock key 106 is pulled out from the key hole 107 in this state, the lock claw 105 is fixed at the first position, and the engagement state with the engagement recess 83 is maintained. As a result, the battery unit 44 is irremovably locked to the seat stays 7a and 7b. Therefore, it is possible to prevent the battery unit 44 from falling off and prevent the battery unit 44 from being stolen while the bicycle is parked.

Further, as described above, the battery unit 44
Of the rubber damper 1 when the connecting portion 77 of
09 contacts the lower surfaces of the front ends of the first and second case portions 75 and 76. By this contact, the rubber damper 109 is compressed. Then, the upward reaction force that the rubber damper 109 intends to expand is applied to the first and second case portions 75 and 76.
Through the engaging portion between the lock claw 105 and the concave portion 83. Therefore, the lower surface of the concave portion 83 is pressed against the lock claw 105, and the shape state of the concave portion 83 and the lock claw 105 is reliably maintained.

The battery unit 44 is connected to the seat stay 7
To remove the lock key 106a from the lock holes a and 7b, the lock key 106 is inserted into the key hole 107 and rotated from the lock position to the unlock position. By this rotation, the lock claw 105 is disengaged from the engagement concave portion 83, and the lock of the battery unit 44 is released.

Next, the handle 84 is rotated to the second position, the grip portion 85c is gripped, and the battery unit 44 is rotated.
Is caused upward of the rear wheel 15 as shown in FIG. As a result, the concave portion 82 is pulled out from the guide protrusion 96 and the relay connector 81 is
a, and the electrical connection between the battery unit 44 and the power assist unit 26 is released.

Finally, the battery unit 44 is pulled out obliquely upward and forward, and the protrusions 75a and 76a are pulled out from the battery receivers 110a and 110b. As a result, the battery unit 44 can be removed from the seat stays 7a and 7b, and can be charged using the household power supply in the room.

According to the electric hybrid bicycle 1 having such a configuration, the battery unit 44 serving as the power source of the power assist unit 26 can be supported by using the seat stays 7a and 7b constituting the basic frame of the frame 2. it can. Therefore, the heavy and large battery unit 44
This eliminates the need for a dedicated carrier for supporting the frame, reduces the weight, and prevents the light image of the frame 2 having the X-shaped basic skeleton from being lost.

The battery case 47 of the battery unit 44 is divided into first and second case portions 75 and 76, and these first and second case portions 75 and 76 are provided.
Are arranged separately on the left and right of the rear wheel 15,
Individual case portions 75 and 76 are reduced. Therefore, the first and second case portions 75 and 76 are attached to the seat stays 7.
a, can be arranged compactly along 7b,
The feeling of unity with the frame 2 and the battery case 47 can be enhanced.

Further, since the battery unit 44 and the electric motor 40 are located behind the seat tube 6 supporting the saddle 12, when the occupant sits on the saddle 12, the battery unit 44 and the electric motor
There is no entry, and the ride feels like a normal bicycle. Therefore, even when riding for the first time, there is no sense of incongruity, and together with the improvement of the sense of unity with the frame 2 and the battery case 47, the appearance of the frame 2 and the original light image of the bicycle are not impaired at all. A battery unit 44 can be arranged.

Further, when a plurality of dry cells 48 are stored in a state where they are connected in series to the first and second case portions 75 and 76, these dry cells 48 are coaxially arranged with their axes laid horizontally. Since the battery arrays 48a and 48b are arranged one above the other, the first and second battery arrays 48a and 48b are arranged one above the other, compared to the case where the dry batteries 48 are arranged in a line in the radial direction in an upright posture. The total length of the battery packs 45 and 46 can be reduced. Therefore, the first and second case portions 75, 75 accommodating the first and second battery packs 45, 46 are provided.
76 can be formed compactly, which is convenient for enhancing the sense of unity with the seat stays 7a and 7b.

According to the arrangement of the dry batteries 48 described above, the plurality of dry batteries 48
At 5, 46, they are arranged in a U-shape. for that reason,
The positive electrode terminal plates 53a,
54a and the negative electrode terminal plates 53b and 54b can be arranged vertically one above the other at the end opposite to the one dry battery 48 arranged vertically. Therefore, the positive electrode terminal plate 53 is provided inside the first and second case portions 45 and 46.
It is not necessary to route the lead wires connected to the a, 54a or the negative electrode terminal plates 53b, 54b along the arrangement direction of the dry batteries 48, and the internal structure of the battery case 47 can be simplified.

In addition, the battery unit 44 having the above configuration
Therefore, the first battery pack 45 located on the left side of the center line C of the frame 2 is lighter than the second battery pack 46 located on the right side of the center line C,
The weight of the side stand 22 located on the left side of the frame 2 can be offset based on the weight difference between the battery packs 45 and 46. For this reason, the weight balance of the frame 2 including the side stand 22 in the vehicle width direction can be equalized using the battery unit 44, and the vehicle can run stably without wobbling.

In addition, the first and second case portions 75,
Since the connectors 76 are connected to each other via the box-shaped connecting portion 77, the charging outlet 80 and the relay connector 81 can be arranged at the connecting portion 77. Therefore, the first
It is not necessary to arrange connectors individually in the second case portions 75 and 76, and the structure of these case portions 75 and 76 can be simplified.

Further, the first and second case portions 75,
76 can be removed from the frame 2 at the same time or can be attached to the frame 2, which improves the workability when attaching and detaching the battery unit 44.

Further, if the handle 84 is rotated to the first position in a state where the battery unit 44 is fixed along the seat stays 7a and 7b, the handle 8
The charging outlet 80 can be covered and hidden via the cover 88 of the fourth embodiment. For this reason, it is possible to prevent foreign substances from adhering to the charging outlet 80 and mischief. At the same time, when the handle 84 is rotated from the first position to the second position, the cover portion 88 is detached above the charging outlet 80, so that the charging outlet 80 is connected to the connecting portion 7.
7 can be exposed to the side. Therefore, the charging operation can be performed even when the battery unit 44 is fixed to the seat stays 7a and 7b.

The present invention is not limited to the first embodiment, and FIGS. 9 and 10 show a second embodiment of the present invention.

The second embodiment is different from the first embodiment mainly in the arrangement of dry cells 48 in a battery case 47, and the other structure is the same as that of the first embodiment. Is the same as Therefore, in the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 10A, the first and second battery packs 45 and 46 housed in the first and second case portions 75 and 76 of the battery case 47 are
Each has ten dry batteries 48. These batteries 4
As shown in FIG. 10B, 8 is arranged in a line in the radial direction with its axis lined up vertically. The adjacent dry batteries 48 are arranged in such a manner that the anode terminal 50a and the cathode terminal 50b are opposite to each other, and the anode terminal 50a and the cathode terminal 50b of these adjacent dry batteries 48 are Are electrically connected via The connection pieces 131 are spot-welded to the anode terminal 50a and the cathode terminal 50b, respectively.

As shown in FIG. 10A, the first power supply fitting 1 is connected to the anode terminal 50a of the dry battery 48 located at the end of the battery case 47 on the side of the protruding portions 75a and 75b.
32 is spot-welded. The second power supply fitting 133 is spot-welded to the cathode terminal 50b of the dry battery 48 located at the end of the battery case 47 on the connecting portion 77 side.

The first power supply fitting 132 has a lead wire 13
4 are connected. The lead wire 134 is accommodated in the first and second case portions 75 and 76, and is led in a straight line toward the connecting portion 77 of the battery case 47. The lead wire 134 of the first battery pack 45 is guided to the second case portion 76 through the connecting portion 77, and is connected to the second power supply bracket 133 of the second battery pack 46. The lead wire 134 of the second battery pack 46 is connected to the first and second connectors 56 and 5.
7 are connected to the positive electrode terminals 56a and 57a, respectively.

According to such a configuration, the first and second
Battery packs 45 and 46 each have ten dry batteries 4
8, the weight balance between the first case portion 75 and the second case portion 76 can be equalized.

FIG. 11 discloses a third embodiment of the present invention.

The third embodiment differs from the first embodiment in the arrangement of the dry cells 48 constituting the first battery pack 45, and the other configurations are the same as those in the first embodiment. Same as the form.

[0100] As shown in FIG.
The first battery pack 45 housed in the first case 75 has nine dry cells 48. As in the second embodiment, these dry cells 48 are arranged in a line in the radial direction with the axis thereof set vertically. The adjacent dry batteries 48 have the anode terminal and the cathode terminal arranged in the opposite directions to each other, and the anode terminal and the cathode terminal of the adjacent dry batteries 48 are electrically connected to each other through a flat connection piece. Have been.

Also in such a configuration, since the weight of the first case portion 75 and the weight of the second case portion 76 are different from each other, the side stand 2 using the battery unit 44 is used.
One weight can be offset.

FIG. 12 and FIG. 13 disclose a fourth embodiment of the present invention.

The fourth embodiment is a further development of the second embodiment, and differs from the second embodiment in the configuration of the battery unit 140.
Other configurations are the same as those in the first embodiment.

As shown in FIG. 13, the battery unit 1
40 is a first case part 141 and a second case part 142
And These first and second case portions 14
1, 142 has a hollow cylindrical shape extending along the seat stays 7a, 7b, respectively. The first case portion 141 is arranged along the upper surface of the left seat stay 7a, and the second case portion 142 is arranged along the upper surface of the right seat stay 7b. For this reason, the first and second case portions 141 and 142 are arranged so as to be divided right and left with the rear wheel 15 therebetween.

The first and second case portions 141, 1
42 includes first and second battery packs 45 and 46.
Is housed. These battery packs 45, 46
Are shifted toward the rear of the first and second case portions 141 and 142.

First and second case portions 141 and 142
Are connected by a handle 144 having a substantially U shape in plan view. The handle 144 is connected to the seat stay 7a,
Pair of arm portions 145a, 145b extending along 7b
And a grip portion 145c that is curved in an arc shape and connects the distal ends of the arm portions 145a and 145b. The handle 144 includes arm portions 145a and 145.
The first position where b enters the front part of the first case parts 145a and 145b, and the second position where the arm parts 145a and 145b are pulled out to the front of the first case parts 145a and 145b.
Are slidably supported by the first and second case portions 141 and 142.

As shown in FIG. 12, when the pedal 32 is depressed and the vehicle runs manually, the foot L
Draws a turning trajectory passing through the side of the first half 141a, 142a of the first and second case parts 141, 142. Therefore, as shown in FIG. 13, the first halves 141 a, 14 a of the first and second case portions 141, 142
Recesses 146 are formed on the side surfaces of 2a so as to be recessed inward. Due to the presence of the concave portion 146, the first half portions 141a, 141 of the first and second case portions 141, 142 are provided.
The width dimension of 42a is set smaller than the width dimension of the rear half portions 141b and 142b.

A battery lock device 148 is attached to the front of the seat stays 7a and 7b. The battery lock device 148 has such a size as to enter the inside of the handle 144 drawn out to the first position. The battery lock device 148 includes a lock cylinder 150 having a key hole 149 and a lock cylinder 1.
A pair of lock claws 151a, 15 operated by 50
1b.

The lock claws 151a and 151b are provided at a first position protruding from the left and right side surfaces of the battery lock device 148, and a second position retracted into the battery lock device 148.
The lock pawls 151a and 151b can rotate the lock key (not shown) inserted into the key hole 149 to rotate the lock claw 151a, 151b.
And a second position.

That is, the lock key is the lock claw 1
The lock position for moving the first and second lock members 51a and 151b to the first position, and the second lock position for the lock claws 151a and 151b from the first position to the second position.
Can be rotated over a lock release position forcibly moved to the position. Therefore, when the lock key 152 is rotated to the lock position, the lock claws 151a, 151
b is moved to the first position and hooked on the arm portions 145a and 145b of the handle 144, and the battery unit 140 is irremovably locked to the seat stays 7a and 7b via the handle 144.

According to such a configuration, the seat stay 7
Since the concave portions 146 are formed on the side surfaces of the first and second case portions 141 and 142 arranged along the lines a and b, when the pedal 32 is depressed and the vehicle runs manually, the foot L is moved to the first and second positions. Interference with the case portions 141 and 142 can be prevented. Therefore, the first and second case portions 141,
Despite the fact that 142 is located within the range of the rotation trajectory of foot L depressing pedal 32, the depressing operation of pedal 32 does not have to be impaired.

FIG. 14 discloses a fifth embodiment of the present invention.

The fifth embodiment is an extension of the fourth embodiment, and its basic configuration is the same as that of the fourth embodiment.

As shown in FIG. 14, the first and second battery packs 45 and 46 include a plurality of first batteries 161 having a small diameter and a plurality of second batteries 162 having a large diameter. . The first dry batteries 161 are arranged on the front halves 141a and 142a of the first and second case portions 141 and 142 in a vertical position. The second dry battery 162 includes first and second case portions 141 and 142.
Are arranged in a line in a vertical position on the rear half portions 141b and 142b of the rear panel. These first and second dry batteries 1
61 and 162 are integrally covered with the outer tube 49 and packaged as one unit.

According to such a configuration, the first and second
There is no useless space generated inside the case portions 141 and 142, and it can be effectively used as a space for accommodating the dry batteries 161 and 162.

FIG. 15 discloses a sixth embodiment of the present invention.

The sixth embodiment is a further development of the fourth embodiment, and its basic configuration is the same as that of the fourth embodiment.

As shown in FIG. 15, the first and second battery packs 45 and 46 include a plurality of thin dry batteries 17 having a small diameter.
One. These dry batteries 171 include first half portions 141a and 142 of first and second case portions 141 and 142, respectively.
5A, the rear portions 141b and 141b of the first and second case portions 141 and 142 are arranged in a line in a vertical position.
142b is arranged in two rows in a vertical position.

In such a configuration, a plurality of dry batteries 171 can be arranged according to the shapes of the first and second case portions 141 and 142.
There is no wasteful space inside the case portions 141 and 142. Therefore, the number of the dry batteries 171 can be increased, and the capacity can be increased without increasing the size of the battery unit 140.

FIG. 16 discloses a seventh embodiment of the present invention.

The seventh embodiment differs from the second embodiment in the structure of the connecting portion between the chain stays 8a and 8b and the housing 27 of the power assist unit 26, and the other structures are used. Is the same as in the second embodiment.

As shown in FIG. 16, the chain stay 8
A connecting portion 180 is formed at the front end of each of a and 8b. The connecting portion 180 is configured by squashing the front ends of the chain stays 8a and 8b flat in the vertical direction of the frame 2.

Further, a support portion 181 projecting rearward is formed at a rear portion of the housing 27. The support portion 181 has a flat lower surface 181a, and the connecting portion 180 is fixed to the lower surface 181a by bolts 182. The connection part 180 is butted against the support surface 181a from below. This connecting portion 180
The bolt 182 for fixing to the support portion 181 is
Are arranged substantially vertically along the vertical direction.

With such a configuration, the rear wheel 1
When the rear wheel 15 receives an impact in the vertical direction, such as when the vehicle 5 has climbed over a step, the chain stays 8a, 8b are rotated in the connecting portion between the chain stays 8a, 8b and the housing 27 in the vertical direction. The force to try is added.

In this case, the bolts 182 for fixing the chain stays 8a, 8b to the housing 27 are screwed into the housing 27 from a direction substantially perpendicular to the direction of the force for rotating the chain stays 8a, 8b. Therefore, the bolt 182 does not follow and follow the chain stays 8a and 8b. Therefore, loosening of the bolt 182 can be prevented, and the chain stay 8 can be secured with one bolt 182.
a and 8b can be securely fixed to the housing 27, and no special measures for preventing loosening such as increasing the number of bolts are required.

FIG. 17 discloses an eighth embodiment of the present invention.

The eighth embodiment employs a seat stay 7
The configuration of the connecting portion between a and 7b and the rear lug 5 is different from that of the seventh embodiment, and the other configuration is the same as that of the seventh embodiment.

As shown in FIG. 17, the seat stays 7a,
At the front end of 7b, a connecting portion 191 crushed flat along the width direction of the frame 2 is formed. Further, the rear lug 5 has a support seat 192 projecting rearward, and the connecting portion 191 of the seat stays 7a, 7b is fastened and fixed to the support seat 192 via a bolt 193. The connecting portion 191 is abutted against the support seat 192 from the side, and the connecting portion 191 is connected to the support seat 192.
18 are disposed horizontally along the vehicle width direction. FIG. 18 discloses a ninth embodiment of the present invention.

This ninth embodiment is a seat stay 7
The configuration of the connecting portion between a and 7b and the rear lug 5 is different from that of the seventh embodiment, and the other configuration is the same as that of the seventh embodiment.

As shown in FIG. 18, the seat stays 7a,
At the front end of 7b, a connecting portion 200 squashed flatly along the up-down direction of the frame 2 is formed. Also,
The rear lug 5 includes a support seat 201 protruding rearward. The support seat 201 has a flat support surface 201a.
The connecting portion 200 is fastened and fixed to the support surface 201a via a bolt 202. Connecting part 20
0 abuts against the support surface 201a from below.
Bolt 20 for fixing connecting portion 200 to support seat 201
2 is arranged substantially vertically along the vertical direction of the frame 2.

In such a configuration, the rear wheel 1
When the rear wheel 15 receives an impact in the vertical direction, such as when the vehicle 5 has climbed over a step, the seat stays 7a, 7b are rotated in the vertical direction at the connecting portion between the seat stays 7a, 7b and the rear lug 5. The force to try is added.

In this case, the bolts 202 for fixing the seat stays 7a, 7b to the rear lug 5 are connected to the seat stays 7a, 7b.
Since the screw 7b is screwed into the support seat 201 of the rear lug 5 from a direction substantially perpendicular to the direction of action of the force to rotate the bolt 7b, the bolt 202 does not follow the seat stays 7a and 7b and rotate. Therefore, loosening of the bolt 202 can be prevented, and the seat stay 7 can be secured with one bolt 202.
a and 7b can be securely fixed to the rear lug 5, and no special measures for preventing loosening such as increasing the number of bolts are required.

In each of the above embodiments, the battery unit is detachable from the seat stay. However, the present invention is not limited to this. In some cases, the battery unit may be fixed to the seat stay.

In the first embodiment, the first case portion of the battery case accommodates the light-weight first battery pack having a small number of dry cells, and the second case portion has a large number of dry cells. The second battery pack is accommodated, and the weight of the side stand is offset based on the weight difference between the first case portion and the second case portion.

However, the present invention is not limited to this, and the number of dry batteries accommodated in the first case portion may be set to be larger than the number of dry batteries accommodated in the second case portion. .

According to this configuration, since the heavy first case portion is located on the side stand side, when the side stand is used, the side stand is moved based on the weight difference between the first case portion and the second case portion. Can be pressed firmly against the road surface. Therefore, the posture of the bicycle during parking is stabilized.

[0137]

According to the present invention described in detail above, the power
The battery unit serving as a power source of the assist unit can be supported by using a seat stay serving as a basic frame of the frame, and a dedicated carrier for supporting the battery unit is not required. Further, since the first and second case portions of the battery case are arranged separately on the left and right sides of the rear wheel, the size of each case portion is reduced. for that reason,
The first and second case portions can be arranged compactly along the seat stay, and the sense of unity with the frame and the battery case can be enhanced. Moreover, since the battery unit does not enter the occupant's field of view during riding, the riding feeling similar to that of a normal bicycle can be obtained. In addition to improving the sense of unity, there is an advantage that the battery unit can be arranged without impairing the appearance of the frame or the light image inherent in the bicycle.

[Brief description of the drawings]

FIG. 1 is a side view of an electric hybrid bicycle according to a first embodiment of the present invention.

FIG. 2 is a side view showing a state where the battery unit is mounted along a seat stay of a frame.

FIG. 3 is a plan view showing a state where the battery unit is mounted along a seat stay of a frame.

FIG. 4 is a plan view of first and second battery packs.

FIG. 5A is a side view of the first and second battery packs. (B) is a side view showing the first and second battery packs partially broken away. (C) is a circuit diagram of a battery unit.

FIG. 6 is a cross-sectional view showing a state in which a connecting portion of the battery unit is locked to the battery holder.

FIG. 7 is a plan view showing a state in which a connecting portion of the battery unit is locked to the battery holder.

FIG. 8 is a perspective view of a battery holder.

FIG. 9 is a side view showing a state where the battery unit is mounted along the seat stay of the frame in the second embodiment of the present invention.

FIG. 10A is a sectional view showing the internal structure of a battery unit. (B) is a sectional view showing the arrangement posture of the dry batteries.

FIG. 11 is a plan view showing a state where a battery unit is mounted along a seat stay of a frame in a third embodiment of the present invention.

FIG. 12 is a side view showing a positional relationship between a battery unit and a foot placed on a pedal in a fourth embodiment of the present invention.

FIG. 13 is a plan view showing the positional relationship between the concave portions of the first and second case portions of the battery unit and the foot placed on the pedal.

FIG. 14 is a plan view showing a positional relationship between concave portions of first and second case portions of a battery unit and a foot placed on a pedal in a fifth embodiment of the present invention.

FIG. 15 is a plan view showing a positional relationship between recesses of first and second case portions of a battery unit and a foot placed on a pedal in a sixth embodiment of the present invention.

FIG. 16 is a plan view showing a state in which a battery unit is mounted along a seat stay of a frame in a seventh embodiment of the present invention.

FIG. 17 is a plan view showing a state where the battery unit is mounted along the seat stay of the frame in the eighth embodiment of the present invention.

FIG. 18 is a plan view showing a state where a battery unit is mounted along a seat stay of a frame in a ninth embodiment of the present invention.

[Explanation of symbols]

 2 ... frame 6 ... seat tube 7a, 7b ... seat stay 10 ... front wheel 15 ... rear wheel 22 ... side stand 26 ... power assist unit 32 ... pedal 40 ... electric motor 44 ... battery unit 47 ... battery case 48a, 48b ... battery row 48 secondary battery (dry battery) 75 first case part 76 second case part 77 connecting part 80 charging outlet 84 handle 88 cover part 91 battery support part (battery holder) 101 lock Equipment (lock cylinder)

Continued on the front page (72) Inventor Toshihiro Inashi 2500 Shinkai, Iwata-shi, Shizuoka Yamaha Motor Co., Ltd.

Claims (7)

[Claims] 1. A seat tube disposed between a front wheel and a rear wheel in an upright posture, and a pair of seat stays extending obliquely downward rearward from an upper portion of the seat tube through right and left sides of the rear wheel. A frame; a power assist unit including an electric motor supported by the frame for applying auxiliary power when the pedal is depressed to perform manual driving; and a battery unit supported by the frame and serving as a power source of the electric motor. Wherein the battery unit has a battery case for accommodating a plurality of secondary batteries, and the battery case is divided into left and right sides with the rear wheel interposed therebetween. First and second case portions, and the first and second case portions are provided.
A power supply device for an electric hybrid bicycle, wherein the case portion is disposed along the seat stay. 2. The rechargeable battery according to claim 1, wherein the secondary batteries have a columnar shape and are connected to each other in series.
These secondary batteries constitute a pair of battery rows arranged in a line in the first and second case portions so that their axes are along the seat stays, and these battery rows are stacked up and down. A power supply device for an electric hybrid bicycle, wherein the power supply device is arranged. 3. The battery device according to claim 2, wherein the frame has a side stand on one side in a vehicle width direction, and a first case portion and a second case portion of the battery case are: The number of secondary batteries housed therein is different from each other, and the number of secondary batteries housed in the first case portion located on the side stand side is the number of secondary batteries housed in the second case portion. A power supply device for an electric hybrid bicycle, wherein the power supply device is set to be smaller than the number of batteries. 4. The power supply device for an electric hybrid bicycle according to claim 1, wherein the front ends of the first and second case portions are connected to each other via a connection portion. 5. The seat stay according to claim 4, wherein the seat stay has a battery supporting portion for supporting a connecting portion of the battery case, and the battery supporting portion locks the connecting portion of the battery case in a non-removable manner. A power supply device for an electric hybrid bicycle, comprising: 6. The connection unit according to claim 4, wherein the connection unit includes a charging outlet connected to the secondary battery, and a carrying handle having a cover that covers the charging outlet. The handle is rotatable between a first position in which the cover covers the charging outlet and a second position in which the cover is detached from the charging outlet. A power supply device for an electric hybrid bicycle, the power supply device being supported by a vehicle. 7. The electric hybrid bicycle according to claim 1, wherein the electric motor is disposed between the seat tube and the rear wheel in an upright position along the seat tube. Power supply.