JP2001097275A - Battery mounting structure of electric power-assisted bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery mounting structure of an electric power-assisted bicycle capable of commonly using a battery installed on a V-shaped recessed part even when the angle of the V-shaped recessed part of a down tube and a seat tube is varied. SOLUTION: A down tube 9 and a seat tube 11 are disposed in V-shape, and boss parts 9a and 11a as mounting parts are provided on each of the down tube 9 and the seat tube 11. A front battery mounting base part 38 is installed on the boss part 9a on the seat tube 11 side, and a rear battery mounting base part 40 is installed on the boss part 11a on the seat tube 11 side. A battery 26 is disposed in a V-shaped recessed part between the front battery mounting base part 38 and the rear battery mounting base part 40, and a front locking means is installed on the battery 26 between the front battery mounting base part 38 and the front side part of the battery 26. Then, a rear locking means is provided between the rear battery mounting base part 40 and the rear side part of the battery 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric assisted bicycle which supplies an auxiliary driving force or a self-propelled driving force according to a pedal depression force from an electric motor to wheels, and more particularly, supplies electric power to the electric motor. The present invention relates to an improved battery mounting structure.

[0002]

2. Description of the Related Art Conventionally, in an electric assisted bicycle powered by a battery, in order to supply power to a drive unit including an electric motor mounted on a vehicle body or a drive unit mounted on a wheel axle, a battery is required. And an electrical contact between the drive unit.

As this structure, there is a structure in which terminal portions on a vehicle body side and a battery side are fixed to the vehicle body and the battery, respectively, and when the battery is mounted on the vehicle body, both terminals come into contact (frame fixing terminal). formula).

[0004] Japanese Patent Application No. Hei 9
As described in US Pat. No. 2,279,906, there is a type in which a battery is detachably attached to a V-shaped valley between a down tube and a seat tube.

[0005]

However, in such a conventional device, the battery is attached to the V-shaped valley between the down tube and the seat tube. Since the angle differs depending on the type of vehicle and the like, if the battery mounted in the V-shaped valley is to be shared, a new frame must be designed, and it is difficult to achieve the common use.

In view of the above, the present invention provides a motor-assisted power supply which can share a battery mounted on a V-shaped valley even when the angle of the V-shaped valley between the down tube and the seat tube is different. It is an object to provide a battery mounting structure for a bicycle.

[0007]

In view of such a problem, the invention described in claim 1 is characterized in that a down tube and a seat tube are arranged in a V-shape, and each of the down tube and the seat tube is provided with each of the down tube and the seat tube. A mounting portion is provided, a front battery mounting base portion is mounted on the mounting portion on the down tube side, and a rear battery mounting base portion is mounted on the mounting portion on the seat tube side, and the front battery mounting base portion and the rear battery are mounted. A battery is arranged in a V-shaped valley between the mounting base and a front locking means is provided between the front battery mounting base and a front side of the battery. A battery mounting structure for a battery-assisted bicycle, wherein a rear locking means is provided between a base portion and a rear side portion of the battery.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the front battery mounting base portion and the rear battery mounting base portion are provided with a terminal provided with a power unit side terminal. A battery mounting base is formed by being continued through the portion, and a lock device for locking the battery on an upper portion of at least one of the front battery mounting base and the rear battery mounting base of the battery mounting base. Is provided, a fitting protrusion is formed at the lower end of the battery, and a fitting recess into which the fitting protrusion is fitted is provided at the terminal mounting portion of the battery mounting base. Features.

According to a third aspect of the present invention, the down tube and the seat tube are arranged in a V-shape, and at least one of the down tube and the seat tube is provided with a mounting portion. Alternatively, a battery mounting base portion is mounted on one of the mounting portions on the seat tube side, a battery is disposed in the V-shaped valley portion, and locking means is provided between the battery mounting base portion and the battery. It is characterized by having been done.

[0010]

Embodiments of the present invention will be described below.

[First Embodiment of the Invention] FIGS.
FIG. 1 is a diagram showing a first embodiment of the present invention.

First, the structure will be described.
Is a body frame which is a skeleton of a bicycle, and a handle stem 3 is rotatably inserted into a head pipe 2 located in front of the body frame 1 in the vehicle. A handle 4 is provided at an upper end portion of the handle stem 3, and a front fork 6 on which a front wheel 5 is rotatably supported is provided at a lower end portion side.

From the head pipe 2, a top tube 8 extends substantially horizontally toward the rear of the vehicle body, and a down tube 9 extends obliquely downward toward the rear of the vehicle body. From the lower end of the down tube 9, a seat tube 11 is erected obliquely upward toward the rear of the vehicle body via a connecting portion 10. The top tube 8 is provided at the upper end of the seat tube 11.
And a saddle 13 is supported via a seat post 12 so as to be adjustable in height. The down tube 9 and the seat tube 11 have a substantially V-shape, and the down tube 9, the seat tube 11 and the top tube 8 form a substantially triangular shape.

A pair of left and right chain stays 15 extend from the connecting portion 10 toward the rear of the vehicle body. The rear end of the chain stay 15 extends rearward from the upper portion of the seat tube 11 to the vehicle body. It is connected to the lower end of a seat stay 16 extending obliquely downward. And this chain stay 15 and seat stay 1
A rear wheel 17 is rotatably supported by a rear axle 18 at a portion connected to the rear wheel 6, and a small diameter wheel sprocket 19 is provided on the rear axle 18.

On the other hand, a power unit (not shown) is suspended at a connecting portion 10 between the down tube 9 and the seat tube 11.

This power unit is constructed by combining a human-powered drive system by the occupant's treading force and an auxiliary power system by two electric motors.

In the power unit 21, a bracket is bolted to the connecting portion 10, and the bracket supports the crankshaft 22 and the electric motor. A pair of left and right cranks 23 is provided at both ends of the crankshaft 22.
Are fixed, and pedals 24 are pivotally supported at the distal ends of both cranks 23. The crankshaft 22 is connected to a resultant shaft via a planetary gear mechanism, and the driving forces of the two electric motors are transmitted to the resultant shaft.

A potentiometer and a vehicle speed sensor are arranged on the bracket, and these are connected to a control unit. The magnitude of the pedaling force applied to the pedal 24 is determined from the detected value of the potentiometer, and the vehicle speed sensor is determined. , And calculates the auxiliary driving force based on the built-in auxiliary driving force control map,
The electric current corresponding to the auxiliary driving force is supplied from the battery 26 to the electric motor.

A drive sprocket 27 shown in FIG. 1 is fixed to the resultant shaft, and the drive sprocket 27 and the wheel sprocket 19 are connected to the chain 2.
9 are connected.

Further, the battery 26 is detachably attached to a valley between the V-shaped down tube 9 and the seat tube 11.

Specifically, the battery 26 has a substantially triangular shape such that the battery body 31 is disposed below the top tube 8 and between the V-shaped down tube 9 and the seat tube 11. The battery main body 31 accommodates a large number of Ni-Cd, Ni-MH or lithium ion cells 32 connected in series. The battery body 31 has a handle 3 at the upper center.
3 is formed, and a charging terminal 34 is provided on the upper rear end side.
Is built-in.

The battery 26 is attached to a V-shaped valley formed by the down tube 9 and the seat tube 11 via a battery attachment base 36.

More specifically, the down tube 9 and the seat tube 11 are provided with a plurality of boss portions 9a, 11a as "attaching portions", respectively, which are welded to each other and project a predetermined amount toward the inside of the V-shape. Has been established.

The battery mounting base 36 is screwed to the boss 9a on the down tube 9 with a screw 37 and the boss 11a on the seat tube 11 with a screw 39. And a rear battery mounting base 40.
40 are formed continuously via a terminal arrangement portion 43 provided with a power unit side male terminal 42 as a “power unit side terminal”.

Each of the bases 38 and 40 has a U-shaped cross section as shown in FIG.
As shown in FIG. 2, a fitting recess 44 is provided. A front-side fitting groove 31a and a rear-side fitting groove 31b are formed in a front side and a rear side of the battery body 31, respectively. The base section having the U-shaped cross section is formed in each of the fitting grooves 31a and 31b. The front battery mounting base 38 and the front fitting groove 3 are fitted to each other.
1a constitutes "front locking means", and the rear battery mounting base portion 40 and the rear fitting groove 31b form "rear locking means". The battery main body 31 has a fitting protrusion 31c formed at a lower end thereof and protruding downward, and the fitting protrusion 31c is attached to the battery mounting base 36.
Is inserted from above into the fitting concave portion 44 and fitted. The bottom of the fitting recess 44 is
The drain hole 44a is formed as shown in FIG.

Further, the rear battery mounting base 4
A lock device 46 for locking the battery 26 is disposed above the zero.

As shown in FIG. 7 and the like, the lock device 46 is slidably disposed in the vehicle width direction with the lock pin 46b urged in the protruding direction on the lock device body 46a. The operation is such that the lock pin 46b is drawn into the lock device main body 46a by a mechanism for omitting details.

The tip of the lock pin 46b is
The battery is locked by being inserted into a lock hole 31d formed in the battery main body 31, and is unlocked by pulling in the lock pin 46b by a key operation.

In such a vehicle, when the V-shaped angle between the down tube 9 and the seat tube 11 is different due to the difference of the vehicle type, for example, as shown in FIGS. Boss portions 9a and 11a having different lengths
Is attached by welding or the like, so that the down tube 9
There is no need to change the design of the seat tube 11 or the like,
The battery mounting base 36 and the battery 26 can be shared.

Next, a case where the battery 26 is mounted on the vehicle body frame 1 will be described.

Grasping the handle 33 of the battery 26 and lifting the battery 26, the down tube 9
The battery 26 is positioned between the power supply side male terminal 42 and the seat tube 11.

From this state, the battery 26 is lowered, the power unit side male terminal 42 is inserted into the battery side female terminal of the battery 26 to make it conductive, and at the same time, the fitting projection 31c of the battery 26 is connected to the battery mounting base. 36
Is fitted into the fitting concave portion 44. At the same time, the front and rear fitting grooves 31a and 31b of the battery body 31 are fitted to the front and rear battery mounting bases 38 and 40 having a U-shaped cross section.

As a result, the position of the battery 26 is regulated in all directions.

When the battery 26 is lowered, the peripheral edge of the lock hole 31d of the battery body 31 slides on the inclined surface of the tip of the lock pin 46b.
The lock pin 46b is pushed in against the urging force, and is again projected by the urging force, so that the lock pin 46b is inserted into the lock hole 31d of the battery main body 31, locked and prevented from moving upward. It will be regulated.

Here, the locking device 46 is provided at the upper end of the rear battery mounting base 40 and not provided at the upper end of the front battery mounting base 38. By fitting the portion 31c into the fitting concave portion 44 at the lower end of the battery mounting base 36, the upward movement of the battery 26 can be reliably restricted. That is, assuming that the battery 26 is held only by the lock device 46 at the upper rear part of the battery 26,
The battery 26 may rotate clockwise in FIG. 8 around the lock device 46. However, since the fitting protrusion 31c at the lower end of the battery 26 is fitted into the fitting recess 44 of the battery mounting base 36, the standing wall before and after the fitting recess 31 is attached to the standing wall before and after the fitting recess 44. Are in contact with each other, so that the rotation is prevented.

By pressing the upper and lower sides of the battery 26 in this manner, the rattling of the battery 26 and the like can be further suppressed.

On the other hand, in order to remove the battery 26, the lock device 46 is operated by a key so that the lock pin 46 is removed.
b is pulled into the lock device main body 46a side, and the lock pin 46b is released from the lock hole 31d of the battery main body 31. At this time, since the lock device 46 is set at a relatively high position, the key operability is good.

Thereafter, the battery 26 is removed from the vehicle body frame 1 by pulling up with the handle 33.

[Second Embodiment of the Invention] FIGS. 9 to 11 show a second embodiment of the present invention.

In the first embodiment, the bosses 9a and 11a are provided as the "mounting portions", whereas in the second embodiment, the band member 48 is provided as the "mounting portion". Is different.

As shown in FIG. 11 and the like, the band member 48 is configured so that the circular band portion 48a can rotate and reduce the diameter of the screw member 48b, and the screw member 48b can be attached thereto. Base 48c
The female screw member 48d is fixed in a state protruding sideward.

Then, the band member 48 is
8a, the down tube 9 and the seat tube 11 are attached to predetermined positions, and the female attachment member 48d of the band member 48 is attached with the battery attachment base 36 by screws 37, 39.
The battery 26 is detachably attached to the battery attachment base 36 in the same manner as in the first embodiment.

By using the band member 48 as described above, it is not necessary to weld the boss members 9a and 11a to the body frame 1 such as the down tube 9 as shown in the first embodiment.
The band member 48 can be easily arranged on the body frame 1. Of course, the female screw member 48 of this band member 48
By changing the height H of d and the like, the battery 26 and the battery mounting base 36 can be shared.

By attaching the battery mounting base 36 to the female screw member 48d of the band member 48, the screw member 48b of the band member 48 can be covered by the battery mounting base 36, and the screw member 48b is operated by an unauthorized operation. Without being protected, it is possible to ensure theft resistance.

Other configurations and operations are the same as those of the first embodiment, and therefore the description is omitted.

[Third Embodiment of the Invention] FIG. 12 shows a third embodiment of the present invention.

The third embodiment is different from the first embodiment in the front and rear locking means.

That is, the front battery mounting base 38
Is formed with a front fitting groove 38a.
The front fitting protrusion 31e fitted into the battery body 31
And these constitute a front locking means.

A rear fitting groove 40a is formed in the rear battery mounting base 40, and a rear fitting projection 31f fitted in the rear fitting groove 40a is formed in the battery body 31. , These constitute a rear locking means.

Other configurations and operations are the same as those of the first embodiment.

In each of the above embodiments, both the down tube 9 and the seat tube 11 are provided with the boss portions 9a, 11a and the band member 48 as "attaching portions". It may be provided on only one of the tube 9 and the sheet tube 11. The front battery mounting base 38 and the rear battery mounting base 40 can also be disposed on the side where the mounting portions are provided.

[0052]

As described above, according to the invention described in each claim, even if the angle of the V-shape between the down tube and the seat tube is different, the shape of the mounting portion provided on each tube is different. The battery can be locked and attached to the battery attachment base attached to this attachment. Therefore, it is possible to share the battery with a slight change only by changing the mounting portion.

According to the second aspect of the present invention, by pressing the battery between the upper side and the lower side, it is possible to hold down the battery more securely with less backlash and the like, and to provide the power unit with a battery mounting base. By providing the side terminals, there is no need to improve the arrangement of the terminals on the body frame side.

According to the third aspect of the present invention, since the battery mounting base portion is disposed on one of the down tube and the seat tube via the mounting portion,
The battery mounting base can be downsized.

[Brief description of the drawings]

FIG. 1 is a side view showing an electric assisted bicycle according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged side view of a main part of the electric assisted bicycle according to Embodiment 1 with a battery removed.

FIG. 3 is a cross-sectional view along a substantially horizontal direction showing a locked state of the battery according to Embodiment 1 and a front / rear battery mounting base.

FIG. 4 is a front view showing a battery mounting base according to the first embodiment.

FIG. 5 is a plan view of FIG. 5 according to the first embodiment.

FIG. 6 is a left side view of FIG. 5 according to the first embodiment.

FIG. 7 is a view including a partial cross section as viewed from the rear of the vehicle in a battery mounted state according to the first embodiment.

FIG. 8 is a side view of the battery mounted state when the length of the boss portion according to the first embodiment is changed.

FIG. 9 is a side view corresponding to FIG. 8 and showing a battery mounting state according to the second embodiment of the present invention;

FIG. 10 is a cross-sectional view showing a state where the screw member according to Embodiment 2 is covered with a battery mounting base.

11A and 11B are views showing a band member according to the second embodiment, wherein FIG. 11A is a front view, FIG. 11B is a plan view of FIG.
FIG. 3A is a right side view of FIG.

FIG. 12 is a cross-sectional view corresponding to FIG. 3, showing a third embodiment of the present invention.

[Explanation of symbols]

 9 Down tube 9a Boss (mounting part) 11 Seat tube 11a Boss (mounting part) 26 Battery 31 Battery body 31a Front fitting groove (front locking means) 31b Rear fitting groove (rear locking means) 31c Mating protrusion 31d Lock hole 36 Battery mounting base 38 Front battery mounting base 40 Rear battery mounting base 42 Power unit side male terminal (power unit side terminal) 43 Terminal arrangement part 44 Fitting recess 46 Locking device

Claims (3)

[Claims] 1. A down tube and a seat tube have a V
A mounting portion is provided on each of the down tube and the seat tube, a front battery mounting base portion is provided on the down tube side mounting portion, and a rear battery mounting portion is provided on the seat tube side mounting portion. A base portion is attached to each, a battery is disposed in a V-shaped valley between the front battery mounting base portion and the rear battery mounting base portion, and the front battery mounting base portion and a front side portion of the battery are disposed. And a rear locking means is provided between the rear battery mounting base and the rear side of the battery. Construction. 2. The battery mounting base is formed by connecting the front battery mounting base portion and the rear battery mounting base portion via a terminal arrangement portion provided with a power unit side terminal. A lock device for locking the battery is provided on at least one of the front battery mounting base portion and the rear battery mounting base portion of the mounting base, and a fitting protrusion is provided at a lower end portion of the battery. The battery mounting structure for an electrically assisted bicycle according to claim 1, wherein a fitting recess formed and fitted with the fitting protrusion is provided in a terminal disposing portion of the battery mounting base. 3. The down tube and the seat tube have a V
A mounting portion is provided on at least one of the down tube and the seat tube, and a battery mounting base portion is mounted on the down tube side, or on one of the mounting portions on the seat tube side, A battery mounting structure for a battery-assisted bicycle, wherein a battery is disposed in a V-shaped valley portion, and locking means is provided between the battery mounting base portion and the battery.