JP2011207249A - Folding type power-assisted bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a feeder or the like from being damaged even when falling over in a folded state.SOLUTION: A folding type power-assisted bicycle includes: a front frame 1 having a front wheel 4; a handle frame 5 provided on the front frame 1 and capable of being folded; a handlebar 6 attached to the handle frame 5; a rear frame 8 having a rear wheel 10; a link mechanism 13 for connecting the front frame 1 and the rear frame 8 to each other so as to be rotatable to a service state and a folded state; a driving unit of a human power driving system for transmitting the stepping force by a pedal 17 to the rear wheel 10; and an electric driving unit of a motor driving system provided on the front wheel 4 for driving the front wheel 4 by the power of a battery 19. A cover 20 for protecting the feeder from the battery 19 to the electric driving unit is provided on the front wheel 1. The cover 20 is arranged on the front wheel 1 side of a virtual line connecting the ground point of the front wheel 4 and the ground point of the folded handlebar 6.

Description

  The present invention relates to an improvement of a foldable battery-assisted bicycle having a human-powered driving system that transmits pedaling force by a pedal to a rear wheel and a motor driving system that transmits electric driving force by an electric unit to a front wheel.

  2. Description of the Related Art Conventionally, a battery-assisted bicycle has been developed that includes a human-powered driving unit that transmits a pedaling force to a rear wheel and a motor-driven electric driving unit that transmits power from an electric unit to the wheels.

  It has been proposed to improve driving performance by driving both front and rear wheels by transmitting the driving force of human power to the rear wheels and transmitting the driving force of the electric drive unit to the front wheels. In order to improve performance, the front frame with the front wheels and the rear frame with the rear wheels are pivotally connected by a link mechanism, and when stored, the front and rear frames are pivoted around the link mechanism and folded. (Patent Document 1).

JP 2003-237680 A

  In the configuration of Patent Document 1, protection of a power supply line and the like to the electric drive unit disposed on the front wheel is not considered. In use, even if the handle falls down, the handle contacts the ground, so the feed line does not touch the ground.In the folded state, the handle also folds, so the feed line etc. There is a risk of contact with the rear frame of the bicycle and damage to the power supply line.

  The present invention has been made in view of the above-described problem of Patent Document 1, and an object of the present invention is to provide a foldable battery-assisted bicycle that can prevent a power supply line and the like from being damaged even if it falls in a folded state. .

  A folding electric assist bicycle according to the present invention includes a front frame having a front wheel, a foldable handle frame provided on the front frame, a handle bar attached to the handle frame, a rear frame having a rear wheel, A link mechanism that rotatably connects the front frame and the rear frame to a use state and a folded state, a driving unit of a human-powered drive system that transmits a pedaling force by a pedal to the rear wheel, and the front wheel, In the folding battery-assisted bicycle having an electric drive unit of a motor drive system for driving the front wheels by the power of the battery, a cover body for protecting a power supply line from the battery to the electric drive unit is provided on the front frame, and the cover body Is arranged on the front frame side from the virtual line connecting the grounding point of the front wheel and the grounding point of the handlebar in the folded state. Characterized in that was.

  According to the present invention, it is possible to prevent the cover body from being grounded when it falls down, and to prevent the cover body from being damaged.

It is a side view which shows the use condition of the battery-assisted bicycle of this embodiment. It is the side view which looked at the same folding state from the front and back wheels.

  An embodiment of the present invention will be described in detail below based on a folding battery-assisted bicycle shown in the drawings.

  Reference numeral 1 denotes a front frame, and a front wheel 4 is supported at a front end portion of the front frame 1 via a front fork 2 and a front wheel shaft 3 and a handle bar 6 is provided via a handle stem 5 and the like. ing. The handle stem 5 is divided into upper and lower parts, and the handle 6 bar is in a folded state, which will be described later, by a known link mechanism 7 interposed between the upper and lower handle stems 5, and a rear frame 8 which will be described later with respect to the front frame 1. The other side is foldably connected.

  8 is a rear frame connected to the rear portion of the front frame 1 by a link mechanism 13 which will be described later. A rear wheel 10 is supported on a rear end portion of the rear frame 8 via a rear wheel shaft 9 and the like. A seat post 12 that supports the saddle 11 is provided on the front side portion of the rear frame 8.

13 is a known link mechanism for connecting the front frame 1 and the rear frame 8, and is a mechanism (not shown) that enables both the front and rear frames to be rotated between the used state and the folded state, and held in the used state. ). In the link mechanism 13, a rotation shaft (not shown) is arranged on the left side of the rear frame 8 when the folding type battery-assisted bicycle according to the present embodiment is viewed from the rear frame 8 side. When the front frame 1 is folded, the front frame 1 is configured to rotate to the left side of the rear frame 8 when viewed from the rear frame 8 side.
A leg portion (not shown) is provided at the front portion of the rear frame 8, and the leg portion is grounded to the ground in a state where the front frame 1 and the rear frame 8 are folded. It becomes a leg part, and it is comprised so that it may have sufficient space | interval with respect to the ground so that a leg part may not earth | ground in use.

  A crankshaft 14 is provided at a position near the front portion of the rear frame 8 at a position below the seat post 12 so as to be pivotable in the left-right direction. A front sprocket and a rear wheel (not shown) attached to the crankshaft 14 are provided. A chain 15 is hung between a rear sprocket (not shown) attached to the shaft 9. A crank 16 is provided at both ends of the crankshaft 14, and a pedal 17 is provided on the crank 16. The crankshaft 14, the front sprocket, the rear sprocket, the chain 15, the crank 16 and the pedal 17 constitute a human power drive unit of a human power drive system.

  Reference numeral 18 denotes a hub unit provided on the front wheel shaft 3 of the front wheel 4 and incorporates therein an electric motor portion (not shown) including an electric motor and a planetary gear mechanism. A battery 19 is detachably attached to the rear part of the seat post 12, and a control unit (not shown) including a microcomputer or the like based on the output of a pedaling force detection unit that detects the pedaling force applied to the pedal 17 The motor unit is driven by the output of the battery 19. The electric motor unit, the battery 19, the pedal force detection unit, and the control unit constitute an electric drive unit of a motor drive system that drives and controls the front wheel 4.

  As shown in FIG. 1, a cover 20 made of synthetic resin is provided on the right side of the front wheel 4 in the folding electric bicycle according to the present embodiment. The front hawk 2 near the front wheel shaft 3 is connected to the front wheel shaft 3. It is formed so as to cover the wiring line (not shown) to the electric motor unit. The cover body 20 has a handlebar 6 fixed to the front and rear frames 1 and 8 with a belt or the like, as shown in FIG. 2, from a virtual line A connecting the grounding point of the front wheel 4 and the grounding point of the handlebar 6 as shown in FIG. The cover body 20 is configured to be positioned on the front frame 1 side so that the cover body 20 does not come into contact with the ground when the folded vehicle body falls to the front frame 1 side. Further, the cover body 20 is located on the front frame 1 side from the imaginary line connecting the ground point of the front wheel 4 and the ground point of the handle bar 6 even when the vehicle body falls down without the handle bar 6 being folded. Is configured to do.

  Next, the folding method of the folding type battery-assisted bicycle according to this embodiment will be described below. In the following description, the front frame 1 is rotated with respect to the rear frame 8 without moving the rear frame 8, but the present invention is not limited to this description.

  The front frame 1 is rotated leftward with respect to the rear frame 8 with the rotation axis of the link mechanism 13 as a fulcrum. In this state, the cover body 20 of the front frame 1 is located on the side opposite to the rear wheel shaft 9 of the rear frame 8, and the cover body 20 does not contact the rear wheel shaft 9 and is not damaged.

  Further, in this state, the handle frame 5 is rotated by the link mechanism 7 so that the handle bar 6 is positioned on the side opposite to the rear frame 8 with respect to the front frame 1. Since the handle bar 6 is folded and positioned above the cover body 20, the handle bar 6 does not come into contact with the cover body 20 even if the handle bar 6 is shaken during carrying.

  When the battery-assisted bicycle is folded, the front and rear frames 1 and 8 and the folded handle frame 5 are fastened by a belt (not shown) or the like, or stored in a storage bag, and in the folded state, the front and rear frames 1 and It is preferable in terms of transportation or storage that the 8 and the handle bar 6 are prevented from rotating.

  In the folded state, the front and rear wheels 4 and 10 and the leg are grounded and held in an upright state. When the vehicle body falls to the front frame 1 side in this folded state, the folded handlebar 6 and the front wheel 4 are grounded, but the cover body 20 connects the grounding point of the handlebar 6 and the grounding point of the front wheel 4. Since it is located on the front frame 1 side from the imaginary line A, the cover body 20 does not come into contact with the ground, and the cover body 20 can be prevented from being damaged.

  The present invention can be used for a folding battery-assisted bicycle.

DESCRIPTION OF SYMBOLS 1 Front frame 4 Front wheel 5 Handle frame 6 Handle bar 8 Rear frame 10 Rear wheel 13 Link mechanism 17 Pedal 18 Hub 19 Battery 20 Cover body

Claims (2)

A front frame having a front wheel, a foldable handle frame provided on the front frame, a handlebar attached to the handle frame, a rear frame having a rear wheel, and the front frame and the rear frame in use And a link mechanism that is pivotably connected to a folded state, a driving unit of a human-powered drive system that transmits pedaling force by a pedal to the rear wheel, and a motor that is provided on the front wheel and drives the front wheel by power of a battery In a folding battery-assisted bicycle having an electric drive unit of the drive system,
The front frame is provided with a cover body that protects the power supply line from the battery to the electric drive unit,
A foldable battery-assisted bicycle characterized in that the cover body is disposed on the front frame side from an imaginary line connecting a grounding point of the front wheel and a grounding point of a folded handlebar. The foldable battery-assisted bicycle according to claim 1, wherein the electric drive unit is disposed on a hub of a front wheel.

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