JP6485737B2 - Small electric vehicle - Google Patents

Description

  The present invention relates to a small electric vehicle, and more particularly to a small electric vehicle that can also be used as a cart.

Elderly people and persons with physical disabilities who are unable to walk long distances use small electric vehicles such as electric wheelchairs. The small electric vehicle is provided with a basket, for example, in order to put a product bought at a store.
Moreover, as a small electric vehicle, there exists a thing of the structure which can change the form of a vehicle body into the board form which a person uses by hand to carry a thing and the board | substrate form which carries a person and drive | works.
Examples of such a small electric vehicle include the following prior art documents.

JP 2013-107581 A JP-A-6-329068

The small electric vehicle according to Patent Document 1 has a structure in which a seat back or a portion in the vicinity thereof is provided with a rear operation unit for switching the traveling direction and forward / backward movement, and the handle can be folded.
The bicycle that serves as a cart according to Patent Document 2 can be used as a two-wheel cart by connecting a front vehicle body and a rear vehicle body so that they can be folded in the front-rear direction.

By the way, in the above-mentioned Patent Document 1, there is a problem that even in a state where the handle is folded, it is difficult to move in a narrow place such as in a store because of the size of the vehicle.
Further, in Patent Document 2 described above, the carrier (basket) is located at a low position near the wheel, so when loading / unloading the luggage, it must bend and burden on the user's body. There was an inconvenience that it took a lot.

  Therefore, the present invention is a small electric vehicle that can change the form of a vehicle body to a riding form for carrying a person and a cart form used by a person to carry an object. It aims at providing the small electric vehicle which can improve functionality.

  The present invention includes at least one front wheel disposed at a front portion of a vehicle body and steered by a steering wheel, a pair of left and right rear wheels disposed at a rear portion of the vehicle body and driven by a motor, and the front-rear direction of the vehicle body. A floor disposed in the vicinity of a front wheel, a seat disposed behind the floor in the vehicle body and at a position higher than the floor, a basket disposed at a rear portion of the vehicle body for storing luggage, A first link mechanism that connects the rear wheel to the vehicle body and bends in a mountain shape at an intermediate portion thereof; a riding configuration for traveling with a person on it; and a cart configuration for use by a person to carry objects manually In the small electric vehicle capable of changing the form of the vehicle body, the lower side of the first link mechanism is interlocked with the first link mechanism, and the bent portion is mountain-shaped with the upper side as a mountain. A second link mechanism that bends is disposed, a bracket that moves upward as the second link mechanism is bent at the bent portion is attached to the second link mechanism, and the basket is attached to the bracket. It is characterized by that.

  The present invention is a small electric vehicle in which the form of a vehicle body can be changed between a riding form for traveling with a person on board and a cart form used by a person to carry an object by hand, and functionality when used as a cart. Can be improved.

FIG. 1 is a perspective view of a riding form of a small electric vehicle. (Example) FIG. 2 is a left side view of a riding form of the small electric vehicle. (Example) FIG. 3 is a front view of a boarding mode of the small electric vehicle. (Example) FIG. 4 is a plan view of a boarding mode of the small electric vehicle. (Example) FIG. 5 is a partial side view when the small electric vehicle is folded. (Example) FIG. 6 is a left side view of a cart form of a small electric vehicle. (Example)

  The present invention is a small electric vehicle in which the form of a vehicle body can be changed between a riding form for traveling with a person on board and a cart form used by a person to carry an object by hand, and functionality when used as a cart. The purpose of improving the vehicle is realized by moving the position of the basket obliquely upward and approaching the handle when changing from the riding configuration to the cart configuration.

1 to 6 show an embodiment of the present invention.
As shown in FIGS. 1 to 4, a small electric vehicle (hereinafter referred to as “vehicle”) 1 composed of an electric wheelchair or the like includes a vehicle body 2 and is used to carry a person and a vehicle for carrying a person. Is a structure in which the form of the vehicle body 2 can be changed to a cart form used by hand.
The vehicle body 2 includes a floor support frame 3 which is formed in a rectangular shape and whose longitudinal direction extends in the front-rear direction X at the front portion.
The vehicle body 2 includes a pair of left and right front wheels 4 and 4 serving as at least one front wheel disposed at the front, and a pair of left and right rear wheels 5 and 5 disposed at the rear.
As shown in FIG. 2, the diameter of the front wheels 4 and 4 is set smaller than the diameter of the rear wheels 5 and 5. Further, as shown in FIG. 3, the distance between the front wheels 4, 4 in the left-right direction Y is set smaller than the distance between the rear wheels 5, 5 in the left-right direction Y.

The front wheels 4 and 4 are steered by a handle 7 attached to the upper end of the handle shaft 6. The steering wheel 7 is provided with a driving operation unit 8 operated by an occupant.
The handle shaft 6 extends upward from the front portion of the vehicle body 2 and has a predetermined length, and a handle 7 is attached to the upper end.
The lower end of the handle shaft 6 is connected to the front wheel steering mechanism 9.
The front wheel steering mechanism 9 is fixed to the vehicle body 2 and holds the lower end of the handle shaft 6, and as shown in FIG. The first horizontal member 11 extends in an inverted U shape, and the second horizontal member 12 is connected to the first horizontal member 11 and extends in the left-right direction Y and is connected to the front wheels 4 and 4. . Accordingly, when the handle 7 is turned, the front wheels 4 and 4 are turned via the first horizontal member 11 and the second horizontal member 12.
As shown in FIGS. 3 and 4, the rear wheels 5 and 5 are driven by left and right motors 13 and 14 respectively connected to the rear wheels 5 and 5. The left and right motors 13 and 14 are rotatably held by the left and right motor cases 15 and 15, respectively.

On the upper part of the floor support frame 3 constituting the vehicle body 2, the longitudinal direction extends in the front-rear direction X of the vehicle body 2 and a floor 16 is disposed in the vicinity of the front wheels 4.
The floor 16 is formed in a plate shape and includes a hole portion 17 through which the handle holding bracket 10 arranged in the vertical direction is inserted at the front portion.

As shown in FIG. 2, the floor support frame 3 constituting the vehicle body 2 extends in the longitudinal direction X of the vehicle 1 along the floor 16 in the side view of the vehicle 1.
A seat 18 is disposed on the floor support frame 3 at a position rearward of the floor 16 and higher than the floor 16 in the vehicle body 2. The seat 18 includes a rectangular seat portion 19 and a placement portion 20 on which the seat portion 19 is placed.
In addition, the vehicle body 2 includes a pair of left and right seat support frames 21 and 21 that extend upward from the rear end of the floor support frame 3 and support the seat 18 in the riding state. The seat support frames 21 and 21 constitute the vehicle body 2. Therefore, the vehicle body 2 includes the floor support frame 3 and the seat support frames 21 and 21.
The seat support frame 21 is formed in a rod shape, is disposed rearward from the handle shaft 6 at a predetermined interval so as to be able to support the front portion of the seat 18, and is erected at the rear portion of the floor support frame 3.

The rear wheels 5, 5 are connected to the vehicle body 2 via a pair of left and right first link mechanisms 22, 22.
The first link mechanism 22 includes a first arm member 24 </ b> A and a second arm member 24 </ b> B as a pair of arm members that are connected to each other by a connecting pin 23 and relatively rotate, and an intermediate portion in which the connecting pin 23 is disposed. The portion 25 is bent in a mountain shape.
The first arm member 24A and the second arm member 24B have seat support portions 26 and 26 that extend upward from the connecting pin 23 and support the seat 18 in the riding state.
One end of the first arm member 24 </ b> A is swingably connected to the lower portion of the seat support frame 21 by a connection pin 27, and the other end is connected to the rear portion of the seat 18. The vehicle extends obliquely upward on the rear side of the vehicle.
One end of the second arm member 24B is swingably connected to the upper portion of the seat support frame 21, and the other end is connected to the rear wheel 5. The second arm member 24B is connected to the rear wheel 5 from the upper portion of the seat support frame 21. It extends diagonally downward. Specifically, as shown in FIGS. 1 and 2, the upper portion of the seat support frame 21 and one end of the second arm member 24 </ b> B are connected by a connecting arm 28. One end of the connecting arm 28 is connected to the upper part of the seat support frame 21 by a connecting pin 29, and the other end is connected to one end of the second arm member 24B by a connecting pin 30. The other end of the second arm member 24B is connected to the motor case 15 by a predetermined connecting means.
The connecting pin 23 that connects the intermediate portion of the first arm member 24A and the intermediate portion of the second arm member 24B is attached to the rotation assisting member 31.

As shown in FIGS. 1 and 2, a backrest 32 is disposed behind the seat 18. As shown in FIG. 3, the backrest 32 is arranged in an inverted U shape when viewed from the front. Further, as shown in FIGS. 5 and 6, the first link mechanisms 22 and 22 are bent at the intermediate portions 25 and 25, respectively. Accordingly, it falls to the seat 18 side, and is provided so as to be swingably connected to the first link mechanisms 22 and 22.
Extending portions 33 are connected to lower portions of both ends of the backrest 32 so as to extend downward.
The other end of the first arm member 24 </ b> A is swingably connected to the upper portion of the extending portion 33 by a connecting pin 34.
As shown in FIG. 5, the lower portion of the extending portion 33 and the central portion of the second arm member 24 </ b> B are connected by a connecting arm 35. One end of the connecting arm 35 is swingably connected to the lower portion of the extending portion 33 with a connecting pin 36, and the other end is connected to the second arm member 24 </ b> B above the connecting pin 23 with a connecting pin 37. It is supported by being swingably connected.
Further, as shown in FIG. 5, the connecting pin 23 that connects the first arm member 24 </ b> A and the second arm member 24 </ b> B and the floor support frame 3 are connected by a support member 38. One end of the support member 38 is swingably connected to the connection pin 23, and the other end is swingably connected to the fixture 39 fixed to the floor support frame 3 by the connection pin 40.

Further, the vehicle body 2 has a pair of left and right second link mechanisms 42 that are bent below the first link mechanism 22 and bend in a mountain shape with the bent portion 41 in conjunction with the first link mechanism 22 with the upper side as a mountain. Be placed.
Both ends of the second link mechanism 42 are swingably connected to the lower portion of the seat support frame 21 and the rear wheel 5. Specifically, as shown in FIG. 2, the second link mechanism 42 has a front arm 43 whose one end is swingably connected to the lower portion of the seat support frame 21 together with one end of the first arm member 24 </ b> A by a connecting pin 27. And a rear arm 45 having one end pivotably connected to the motor case 15 on the rear wheel 5 side by a connecting pin 44. The second link mechanism 42 can be relatively rotated by a connecting pin 46 in which the other end of the front arm 43 and the other end of the rear arm 45 are arranged at a portion (substantially central portion) of the bent portion 41. Connected.

As shown in FIG. 2, a bracket 47 whose position moves upward as the second link mechanism 42 is bent at the bending portion 41 is attached to the second link mechanism 42.
The lower portion of the bracket 47 is swingably connected to the bent portion 41 of the second link mechanism 42, and the center portion is connected to the connecting pin 23 of the first link mechanism 22 so as to be relatively movable in the vertical direction. . Specifically, the bracket 47 extends in the vertical direction, and the lower portion thereof is connected to the other ends of the front arm 43 and the rear arm 45 by the connecting pin 46 so as to be relatively rotatable.
The bracket 47 is formed with a long hole 48 extending in the vertical direction so as to pass through the connecting pin 23 that connects the first arm member 24A and the second arm member 24B. The long hole 48 of the bracket 47 allows the bracket 47 to move up and down with respect to the first link mechanism 22.

As shown in FIGS. 2 and 5, a pair of left and right brackets 47, 47 is attached with a mounting portion 50 of a basket 49 disposed at the rear portion of the vehicle body 2 by a predetermined mounting means so as to store luggage. Accordingly, the basket 49 is formed to open upward with a U-shaped cross section, and operates in conjunction with the first link mechanism 22 and the second link mechanism 42.
The basket 49 is disposed below the seat 18.

  As shown in FIG. 2, a battery 51 is installed on the vehicle body 2. The battery 51 is inclined and disposed in a space 52 surrounded by the seat 18, the seat support frames 21 and 21, and the brackets 47 and 47 so that the upper side surface of the battery 51 extends obliquely upward on the front side of the vehicle. .

In the vehicle 1, as shown in FIGS. 5 and 6, when the vehicle 1 is changed from the riding configuration to the cart configuration, the first link mechanism 22 is first bent at the intermediate portion 25, and then the second link. The mechanism 42 is bent upward at the bent portion 41 (indicated by a two-dot chain line in FIG. 5), and the bracket 47 is moved upward along the bracket 47 in conjunction with the second link mechanism 42. For this reason, the basket 49 attached to the bracket 47 also moves upward (indicated by a two-dot chain line in FIG. 6), and the first arm member 24A and the second arm member 24B of the first link mechanism 22 are substantially on the same straight line. And the basket 49 is folded at the substantially same height as the first link mechanism 22 to form a cart.
And the vehicle 1 uses a direction opposite to a boarding form as a advancing direction in a cart form, as shown in FIG.

As a result, in this embodiment, the second link mechanism 42 that bends in a mountain shape with the upper side being a mountain at the bent portion 41 in conjunction with the first link mechanism 22 is disposed below the first link mechanism 22. Is done. A bracket 47 whose position moves upward as the second link mechanism 42 is bent at the bent portion 41 is attached to the second link mechanism 42. A basket 49 is attached to the bracket 47.
With such a structure, when the vehicle 1 is changed from the riding configuration to the cart configuration, the position of the basket 49 can be moved obliquely upward to approach the handle 7. For this reason, when using it as a cart, a user can put in and out the baggage without bending his / her waist, and the functionality as a cart can be improved. Further, in the cart form, as shown in FIG. 6, the basket 49 does not interfere with the user by setting the direction opposite to the boarding form as the traveling direction.
The first link mechanism 22 includes a first arm member 24 </ b> A and a second arm member 24 </ b> B as a pair of arm members that are connected to each other by a connecting pin 23 and rotate relatively. The first arm member 24A and the second arm member 24B have seat support portions 26 and 26 that extend upward from the connecting pin 23 and support the seat 18 in the riding state.
With such a structure, the vehicle body 2 is supported by the seat 18 supported by the seat support portions 26 and 26 integrally formed with the pair of first arm member 24A and second arm member 24B constituting the first link mechanism 22. Can be reduced in weight, and functionality when used as a cart can be improved.
Further, the vehicle body 2 includes a floor support frame 3 that extends in the front-rear direction along the floor 16 in a side view of the vehicle 1, and a seat support frame that extends upward from the rear end of the floor support frame 3 and supports the seat 18 when in the riding state. 21.21. The pair of arm members has a first arm member 24A whose one end is swingably connected to the lower portion of the seat support frame 21 and the other end is connected to the rear portion of the seat 18, and one end of the pair of arm members is the seat support frame 21. The second arm member 24B is connected to the upper part so as to be swingable and has the other end connected to the rear wheel 5.
With such a structure, the position of the basket 49 can be moved closer to the seat support frame 21 when the vehicle 1 is changed from the riding configuration to the cart configuration. For this reason, the basket 49 can be brought close to the handle 7 and the functionality as a cart can be improved.
Furthermore, both ends of the second link mechanism 42 are swingably connected to the lower part of the seat support frame 21 and the rear wheel 5, respectively. A lower portion of the bracket 47 is swingably connected to the bent portion 41 of the second link mechanism 42. The central portion of the bracket 47 is connected to a connection pin 23 that connects the pair of first arm member 24A and second arm member 24B of the first link mechanism 22 so as to be movable in the vertical direction.
With such a structure, the basket 49 can be moved without being tilted when the vehicle 1 is changed from the riding configuration to the cart configuration, or when the vehicle 1 is changed from the cart configuration to the riding configuration.
A backrest 32 that is disposed behind the seat 18 and falls to the seat 18 side as the first link mechanism 22 is bent at the intermediate portion 25 is connected to the first link mechanism 22 so as to be swingable.
With such a structure, when the vehicle 1 is changed from the riding configuration to the cart configuration, the backrest 32 can be brought down to the seat 18 side. For this reason, when using as a cart, the member which separates between a user and the basket 49 can be eliminated, and the functionality as a cart can be improved.
Further, in the riding mode, the battery 51 is inclined and arranged in a space 52 surrounded by the seat 18, the seat support frames 21 and 21, and the brackets 47 and 47 so that the upper side surface extends obliquely upward on the front side of the vehicle. .
With such a structure, the basket 49 can be prevented from coming into contact with the battery 51 when the vehicle 1 is changed from the riding configuration to the cart configuration.

  The link mechanism of the small electric vehicle according to the present invention is not limited to the electric wheelchair but can be applied to other vehicles.

DESCRIPTION OF SYMBOLS 1 Small electric vehicle 2 Car body 3 Floor support frame 4 Front wheel 5 Rear wheel 6 Handle shaft 7 Handle 13 Left motor 14 Right motor 16 Floor 18 Seat 21 Seat support frame 22 First link mechanism 23 First link mechanism connection pin 24A First First arm member of link mechanism 24B Second arm member of first link mechanism 25 Intermediate portion of first link mechanism 26 Seat support member 32 Backrest 41 Bent portion of second link mechanism 42 Second link mechanism 43 Front arm 45 Rear Side arm 47 Bracket 49 Basket 51 Battery 52 Space

Claims (6)

  At least one front wheel disposed at the front of the vehicle body and steered by a handle; a pair of left and right rear wheels disposed at the rear of the vehicle body and driven by a motor; and in the vicinity of the front wheel in the longitudinal direction of the vehicle body A floor disposed on the vehicle body, a seat disposed behind the floor and higher than the floor, a basket disposed at a rear portion of the vehicle body for storing luggage, and the rear wheel. A first link mechanism that is connected to the vehicle body and bends in a mountain shape at an intermediate portion thereof, and is provided with a vehicle form for carrying a person and a cart form used by a person to carry objects manually. In a compact electric vehicle capable of changing the form, a lower portion of the first link mechanism is bent in a mountain shape with the upper portion being a mountain at the bent portion in conjunction with the first link mechanism. A link mechanism is disposed, and a bracket is attached to the second link mechanism, the position of which moves upward as the second link mechanism is bent at the bent portion, and the basket is attached to the bracket. A small electric vehicle.   The first link mechanism includes a pair of arm members that are connected to each other by a connecting pin and that rotate relative to each other, and the pair of arm members extend above the connecting pin and supports the seat when in a riding state. The small electric vehicle according to claim 1, further comprising a seat support portion. The vehicle body includes a floor support frame that extends in the front-rear direction along the floor in a side view of the vehicle, and a seat support frame that extends upward from a rear end of the floor support frame and supports the seat when in a riding state, The pair of arm members has a first arm member whose one end is swingably connected to the lower portion of the seat support frame and the other end is connected to the rear portion of the seat, and one end thereof is an upper portion of the seat support frame. small electric vehicle according to 請 Motomeko 2 other end while being swingably connected to characterized in that it is constituted by a second arm member connected to the rear wheel. Both ends of the second link mechanism are swingably connected to the lower portion of the seat support frame and the rear wheel, respectively, and the lower portion of the bracket is swingably connected to the bent portion of the second link mechanism. 4. The small electric vehicle according to claim 3, wherein the central portion of the bracket is connected to the connection pin that connects the pair of arm members of the first link mechanism so as to be movable in the vertical direction. 5. .   The backrest disposed behind the seat and falling to the seat side as the first link mechanism is bent at the intermediate portion is provided to be swingably connected to the first link mechanism. The small electric vehicle according to any one of 1 to 4. While riding embodiment, the surrounded by sheet and said bracket and said seat support frame space, claim 3 thereon sides so as to extend toward the vehicle front side diagonally upward, characterized in that arranged by inclining the battery Or the small electric vehicle of 4 .

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