JP7363668B2 - small electric vehicle - Google Patents

Description

The present invention relates to a small electric vehicle, and in particular, it has two vehicle body configurations: a riding configuration in which a user rides and the vehicle runs, and a cart configuration or a walking aid vehicle configuration in which the user uses his/her hand to carry objects. This invention relates to a small electric vehicle that can be used as a vehicle.

This type of small electric vehicle has been proposed by the applicant in Patent Document 1.
The small electric vehicle of Document 1 has at least one front wheel arranged at the front of the vehicle body and steered by a handle, a pair of left and right rear wheels arranged at the rear of the vehicle body and driven by a motor, and a pair of left and right rear wheels arranged at the rear of the vehicle body and driven by a motor. A floor placed near the front wheels in the direction of the vehicle, a seat placed behind and higher than the floor in the vehicle body, a basket placed at the rear of the vehicle body for storing luggage, and the rear wheels. The first link mechanism is connected to the vehicle body and bent into a chevron shape at the middle part, and the vehicle body can be configured in two forms: a riding form for carrying people and a cart form for being pushed by a person to carry objects. is changeable.

In particular, in this small electric vehicle, a second link mechanism is disposed below the first link mechanism in conjunction with the first link mechanism and bent into a chevron shape with the upper side being a mountain at the bending part, and the second link mechanism A bracket is attached to the bracket whose position moves upward as the second link mechanism is bent at the bending portion, and the basket is attached to this bracket.

By doing so, when changing the vehicle from riding mode to cart mode, the position of the basket can be moved diagonally upward and closer to the handlebar. Therefore, when using the basket as a cart, the user can put things in and out of the basket without bending down, improving the functionality of the cart.

Japanese Patent Application Publication No. 2016-168153

However, the small electric vehicle disclosed in Patent Document 1 has the following problems.
(1) In this small electric vehicle, the floor is arranged near the front wheels in the longitudinal direction of the vehicle body frame. Even in the cart configuration, the floor projects outwardly from the front side of the vehicle body frame. Therefore, when this floor is used for storing cargo, it is difficult to stably support the cargo depending on the weight of the cargo stored in the basket above the rear of the vehicle body.
(2) This small electric vehicle has a pair of left and right rear wheels driven by a motor, but there is no mention of the arrangement on the vehicle body of a controller that electrically controls the motors. If the controller is placed near the battery in a location that is easily accessible from the outside, the controller may be exposed to shocks or other external forces from outside sources such as rainwater or flying stones, which may cause the controller to malfunction. There are concerns. On the other hand, if the controller is located deep inside the vehicle body, the heat generated by the controller cannot be released to the outside, which is undesirable.

The present invention solves these conventional problems. The present invention is to enable a small electric vehicle of this type to stably transport luggage whether the vehicle is in a riding mode, a cart mode, or a walking aid vehicle mode, and to connect a controller such as a motor to water such as rainwater or flying stones. The purpose is to provide protection from external shocks and other external forces.

In order to achieve the above object, the small electric vehicle of the present invention has the following features:
It has a front base having a front wheel and a rear base having a rear wheel, and the front base and the rear base are extendable and retractable in the front-rear direction, and includes a movable base configured to make the wheel base variable. A small electric vehicle that can be changed into a riding mode in which the user drives the vehicle, and a cart or walking aid vehicle in which the user pushes the vehicle by hand,
Either one of the front base and the rear base has an opening on a surface of the one base facing the other base in the front and back so that the other base can be inserted and removed, and the other base can be accommodated; comprising: a second base housing space capable of housing the other base; and one board disposed above the other base housing space;
The other base includes an accommodated part that can be accommodated in the other base accommodation space of the one base, and one board that allows the one board to be inserted into and removed from the upper part of the accommodated part. and the other board arranged with a storage space in between,
In the riding mode, the other base extends from the other base storage space of the one base through the opening, and extends from the one board storage space at the top of the other base to the top of the one base. The one board extends, and the one board and the other board are arranged in front and behind together with the one base and the other base,
In the cart or walking aid vehicle, the other base is stored in the other base storage space of the one base through the opening, and the one board storage space in the upper part of the other base is stored in the other base storage space. The one board is stored on the upper part of the base, and the one board and the other board are arranged vertically overlapping with the one base and the other base.
The gist is that.

According to the present invention, the following special effects unique to the present invention are achieved.
(1) In the riding configuration of this vehicle, one board and the other board are arranged front and back together with one base and the other base. With this arrangement, one board and the other board can be arranged below the vehicle main body and used as a luggage stand. As a result, whether the vehicle is in the form of a passenger, a cart, or a walking aid vehicle, it is possible to carry luggage stably on the luggage rack located below the body of the vehicle, and protect it from external impacts such as water such as rainwater and flying stones. The controller can be protected from other external forces. In addition, in this riding configuration, one or the other board of the front base can be used as a footrest when the vehicle is running, and can also be used as a footrest and a luggage stand.
(2) In the cart or walking auxiliary vehicle form of this vehicle, one board and the other board are arranged vertically overlapping each other with one base and the other base. These boards can be stacked one above the other in the lower part of the vehicle body, and these boards can be used as a luggage rack. As a result, whether the vehicle is in riding mode, cart mode, or walking auxiliary vehicle mode, luggage can be carried stably on the upper and lower luggage racks located at the bottom of the vehicle body, and it is possible to carry luggage stably from the outside, such as rain water or flying stones. The controller can be protected from impact and other external forces.

A perspective view showing the configuration of a riding mode of a small electric vehicle according to an embodiment of the present invention A partially sectional side view showing the configuration of the small electric vehicle in the form of a cart or walking aid vehicle. A partially omitted front view showing the front configuration of the small electric vehicle Partially omitted rear view showing the rear configuration of the small electric vehicle A partial perspective view showing the configuration of the main parts of the small electric vehicle Partial cross-sectional side view for explaining the operation of the small electric vehicle in riding mode Partial cross-sectional side view for explaining the operation of the small electric vehicle when it is in the form of a cart or walking auxiliary vehicle

As shown in FIGS. 1 and 2, a small electric vehicle C (hereinafter simply referred to as vehicle C) according to an embodiment of the present invention has a front base 11 having front wheels 110 and a rear base having rear wheels 120. 12, a front base 11 and a rear base 12 are extendable and retractable in the front-rear direction, and the movable base 1 is configured to have a variable wheel base. Due to the telescopic structure of the movable base 1, the vehicle C can be changed into a riding mode in which the user rides and travels, and a cart or walking aid vehicle in which the user pushes the vehicle by hand. In this vehicle C, a front board 111 and a rear board 121 are arranged on the front base 11 and the rear base 12, respectively. By extending the front and rear bases 11 and 12, the front and rear boards 111 and 121 are arranged in the front and back. With this arrangement, the front and rear boards 111 and 121 are arranged one behind the other in the lower part of the main body of the vehicle C, and these boards 111 and 121 are used as luggage racks. In this way, in the riding mode of vehicle C, luggage can be carried stably on the front and rear luggage racks located below the main body of vehicle C, and the controller can be protected from external forces such as water such as rainwater and external impacts such as flying stones. It is supposed to be done. In this riding configuration, the front board 111 of the front base 11 is also used as a footrest when the vehicle C is running. Further, in this vehicle C, due to contraction of the front and rear bases 11 and 12, the front base 11 and the rear base 12 are vertically overlapped with the front board 111 and the rear board 121, respectively. With this arrangement, the front and rear boards 111 and 121 are stacked vertically in the lower part of the main body of the vehicle C, and these boards 111 and 121 are used as luggage racks. In this way, even if the vehicle C is in the form of a cart or a walking auxiliary vehicle, the luggage can be carried stably on the upper and lower luggage racks located below the main body of the vehicle C, and can be protected against external shocks such as water such as rainwater and flying stones. The controller is designed to protect the controller from external forces.

As shown in FIG. 1, the moving base 1 of the vehicle C includes a front base 11 and a rear base 12.

As shown in FIGS. 1 and 2, one base 11 or 12 of the front base 11 or the rear base 12 is configured such that the other base 12 or 11 can be removably inserted and accommodated. 12, which has an opening 112 on a surface facing the other base 12 or 11 in the front and back, and is arranged above the other base accommodation space 113 that can accommodate the other base 12 or 11. One board 111 is provided. The other base 12 or 11 has an accommodated part 122 that can be accommodated in the other base accommodation space 113 of the one base 11 or 12, and an upper part of the accommodated part 122 in which one board 111 can be inserted and removed and accommodated. The other board 121 is arranged with one possible board storage space 123 interposed therebetween.

In this way, in the riding configuration of this vehicle C, the other base 12 or 11 is extended from the other base accommodation space 113 of one base 11 or 12 through the opening 112, as shown in FIG. As the other base 12 or 11 expands, one board 111 on the top of one base 11 or 12 extends from one board storage space 123 on the top of the other base 12 or 11, as shown in FIG. Thus, one board 111 and the other board 121 are arranged one behind the other with the base 11 or 12 and the other base 12 or 11. Further, in the cart or walking auxiliary vehicle form of the vehicle C, the other base 12 or 11 is accommodated in the other base accommodation space 113 of one base 11 or 12 through the opening 112, as shown in FIG. Along with housing the other base 12 or 11, one board 111 on the top of one base 11 or 12 is stored in one board storage space 123 on the top of the other base 12 or 11, as shown in FIG. Ru. Thus, one board 111 and the other board 121 are arranged in a vertically overlapping manner together with one base 11 or 12 and the other base 12 or 11.

The vehicle C has such a configuration, and in the riding mode of the vehicle C, one board 111 and the other board 121 are arranged front and rear together with one base 11 or 12 and the other base 12 or 11. This arrangement allows the boards 111 and 121 on the one hand and the other to be arranged below the vehicle C main body, and these boards 111 and 121 can be used as luggage racks. Thereby, in the riding mode of the vehicle C, it is possible to stably carry luggage on the luggage rack located below the vehicle C main body. In addition, the controller can be protected from water such as rainwater, external impacts such as flying stones, and other external forces. In addition, in this riding mode of the vehicle C, one board 111 of the one base 11 serving as the front base 11 can be used as a footrest when the vehicle C is running, and can also be used as a footrest and a luggage stand. can. Further, in the cart or walking auxiliary vehicle form of this vehicle C, one board 111 and the other board 121 are arranged vertically overlapping with one base 11 or 12 and the other base 12 or 11. With this arrangement, the boards 111 and 121 on the one hand and the other board can be arranged vertically and overlappingly in the lower part of the main body of the vehicle C, and these boards 111 and 121 can be used as a luggage stand. As a result, even if Vehicle C is in cart form or walking aid vehicle form, luggage can be carried stably on the upper and lower luggage racks located below the body of Vehicle C, and it is protected against external impacts such as water such as rainwater and flying stones. The controller can be protected from other external forces.

In this vehicle C, as shown in FIG. 2, FIG. 3, and FIG. and the other board 121 at the top thereof, respectively, have gaps S1 and S2 as ventilation paths through which outside air is introduced and circulated. By doing so, whether the vehicle C is in a riding mode, a cart mode, or a walking auxiliary vehicle mode, outside air is introduced and flows into the lower part of the vehicle C body through each gap (air passage) S1, S2. By guiding this airflow of outside air, heat generated from inside each of the bases 11 and 12 on the other hand can be radiated to the outside of the vehicle C main body.

As shown in FIG. 2, this vehicle C includes a controller (controller box 33) that controls the electric drive of the wheels, and the controller is disposed inside the other base 12. In this vehicle C, whether in riding form, cart form, or walking aid form, gaps S1 and S2 between the bases 11 and 12 on one side and between the base 11 on one side and the board 121 on the other side allow the running wind to flow from the other side. This serves as a guide for the airflow directed upward of the base 12, and while drawing in the air inside the other base 12, it can be guided to the rear of the vehicle C via the gaps S1 and S2, and released to the outside air. This makes it possible to prevent abnormal operation of the controller due to heat buildup inside the other base 12 on which the controller is placed.

In this vehicle C, as shown in FIG. 1, the tip end portions of one board 111 and the other board 121 are provided with tip inclined portions 111f and 121f that can be stacked vertically in the form of a cart or a walking aid vehicle, respectively. has. By doing this, in the riding mode of this vehicle C, the inclined end portion 111f of one of the boards 111 on the front side can be used as a footrest, making it easy to rest your feet on when decelerating while the vehicle C is running. can do. In addition, regardless of whether the vehicle C is in the form of a riding vehicle, a cart, or a walking aid vehicle, if the boards 111 and 121 on the other side are used as luggage racks, it is necessary to When stopped, the tip inclined portions 111f, 121f can prevent the cargo on each board 111, 121 from flying out forward. Furthermore, when one board 111 on the top of one base 11 is stored in one board storage space 123 on the top of the other base 12 when the vehicle C is in the form of a cart or a walking auxiliary vehicle, Since the tip inclined portions 111f and 121f of each board 111 and 121 can be stacked vertically, the bases 11 and 12 on one side and the other board 111 and 121 on the other side can be housed and stored compactly as a whole. I can do it.

In this vehicle C, as shown in FIGS. 1 and 4, both sides of one board 111 and the other board 121 have slopes on both sides that can be stacked up and down in the form of a cart or walking aid vehicle of vehicle C. It has sections 111s and 121s. By doing this, in the riding mode of this vehicle C, the sloped portions 111s on both sides of one of the front boards 111 can be used as footrests, making it easier to keep your feet on when turning while the vehicle C is running. can do. In addition, whether the vehicle C is in a riding mode, a cart mode, or a walking aid vehicle mode, if the boards 111 and 121 on the other side are used as luggage racks, when the vehicle C turns while running or when pushing by hand. At times, these side inclined portions 111s and 121s can prevent the cargo on each board 111 and 121 from flying out to the side. Furthermore, when one board 111 on the top of one base 11 is stored in one board storage space 123 on the top of the other base 12 when the vehicle C is in the form of a cart or a walking auxiliary vehicle, Since the sloped parts 111s and 121s of both sides of each board 111 and 121 can be stacked vertically, the bases 11 and 12 on one side and the other side, and the boards 111 and 121 on one side and the other side can be housed and stored compactly as a whole. be able to.

1, 2 and 3, 4, and 5 also show one base 11 or 12 and the other base 12 or 11, one board 111 and the other board 121, together with other parts of the vehicle C, More specific examples of each are shown below. In this specific example, one base 11 or 12 and the other base 12 or 11, one board 111 and the other board 121 will be described in relation to other parts. In this specific example, one base 11 and one board 111 are illustrated as the front base 11 and the front board 111, respectively, and the other base 12 and the other board 121 are illustrated as the rear base 12 and the rear board 111, respectively. The board 121 is shown as an example. In the following description, one base 11 and one board 111 will be referred to as the front base 11 and the front board 111, respectively, and the other base 12 and the other board 121 will be referred to as the rear base 12 and the rear board 121, respectively. It is called.

As shown in FIG. 1, a body C1 of this vehicle C includes a front base 11 and a rear base 12. As shown in FIG.

As shown in FIG. 1, the front base 11 includes a front base frame 21, a front wheel support frame 22, a front wheel 110, a leg support frame 24, a front board 111, and the like.

As shown in FIG. 2, the front base frame 21 has an opening 112 on a surface facing the rear base 12 of the front base 11 in front and back, so that the rear base 12 can be inserted and removed and accommodated. A rear base housing space 113 that can accommodate the base 12 is provided. In this case, the front base frame 21 is formed in the front part of the vehicle body C1 in the shape of a box whose rear end is open when viewed from the front in the longitudinal direction of the vehicle C, and extends in the longitudinal direction of the vehicle C. The front base frame 21 consists of a tip frame 21f, both side frames 21s, an upper frame 21u, and a bottom frame 21b, with an opening 112 at the rear end and a space surrounded by the other frames 21f, 21b, and 21s. This is a rear base housing space 113.

As shown in FIG. 3, the front wheel support frame 22 is supported by the front side of the front base frame 21, extends in the width direction of the vehicle C, and forms a part of the front wheel steering mechanism. The front wheel 110 is pivotally supported at both ends of the front wheel support frame 22 via bearings 221 .

The leg support frame 24 is supported on the rear side of the front base frame 21 and protrudes in the width direction of the vehicle C, as shown in FIG.

The front board 111 is arranged above the rear base accommodation space 113 of the front base frame 21, as shown in FIGS. 1 and 2. In this case, the front board 111 can be installed on the upper part of the rear base accommodation space 113, and is formed into a rectangular shape in plan view, and includes a tip portion 111f, a bottom portion 111b, and both side portions 111s. Further, in this case, in the form of a cart or walking aid vehicle, the front and rear boards 111 and 121 can be stacked vertically, and the front end 111f of the front board 111 is tilted diagonally upward in a predetermined direction. It extends at an angle and forms an inclined tip portion 111f. Similarly, the frame 111s on both sides extends diagonally upward at a predetermined angle to both sides, and both sides have inclined portions 111s on both sides. The front board 111 is installed on the top of the front base frame 21, and serves as a footrest and a luggage stand.

As shown in FIG. 1, the rear base 12 includes a rear base frame 31, a motor case 32 housing an electric motor, a controller box 33 housing a controller (see FIG. 2), a rear wheel 120, and a rear wheel 120. It is configured to include a board 121 and the like.

As shown in FIG. 2, the rear base frame 31 includes an accommodated portion 122 that can be accommodated in the rear base accommodation space 113 of the front base 11. In this case, the rear base frame 31 is formed in the rear part of the vehicle body C1 into a box shape with a part of the upper part and the tip part open when viewed from the front in the front-rear direction of the vehicle C, extends in the front-rear direction of the vehicle C, and has a height. , the width is slightly smaller than that of the front base frame 21. In this case, as shown in FIG. 5, the upper tip of the rear base frame 31 is cut out in a U-shape from the tip to the rear end, and has an opening 310 in the center of the upper part, and the upper part is cut out from the bottom part. It is shorter than . The rear base frame 31 includes a bottom frame 31b, an upper frame 31u having an opening 310 at its tip, a rear end frame 31r (see FIG. 2), and both side frames 31s. The entire rear base frame 31 serves as an accommodated portion 122 that is accommodated in the rear base accommodation space 113 of the front base 11.

As shown in FIGS. 2 and 4, the motor case 32 accommodates the electric motor, is installed at the rear of the rear base frame 31, and extends in the width direction of the vehicle C. The controller box 33 houses a controller that controls the electric drive of the wheels, and is housed inside the rear base 12, in this case in a space surrounded by the frames 31u, 31b, 31s, and 31r that constitute the rear base 12. will be installed. These electric motors and controllers are electrically connected.

The rear wheels 120 are disposed at both ends of the motor case 32, as shown in FIG. 2, and are operatively connected to the electric motor.

As shown in FIGS. 1 and 2, the rear board 121 has a front board storage space 123 above the accommodated portion 122 of the rear base 12, in which the front board 111 can be inserted and removed. Arranged interveningly. In this case, the rear board 121 can be installed on the upper part of the accommodated part 122 of the rear base 12, and is formed into a rectangular shape in a plan view, with a front end 121f, a rear end 121r, a bottom 121b, It consists of both side parts 121s. In addition, in this case, in the form of a cart or a walking aid vehicle, the front and rear boards 111 and 121 can be stacked vertically, and the tip end 121f of the rear board 121 is tilted forward and upward. It extends at the same predetermined angle as the tip inclined portion 111f of the front board 111, forming a tip inclined portion 121f. Similarly, the rear end portion 121r extends rearward and obliquely upward at the same predetermined angle as the front end slope portion 111f of the front board 111, forming a rear end slope portion 121r. Similarly, each of the side portions 121s extends diagonally upward to both sides at the same predetermined angle as the both side sloped portions 111s of the front board 111, and both sides form the both side sloped portions 121s. The rear board 121 is supported and fixed to the upper part of the rear base frame 31, and forms a luggage stand.

Then, outside air is introduced and distributed between the front base 11 and the rear base 12 having such a configuration, and between the front base 11 and the upper rear board 121 of the rear base 12. Gaps S1 and S2 are provided as ventilation paths. In this case, as shown in FIG. Appropriate ventilation passages S1 and S2 are formed between the rear board 121 and the rear board 121, with a predetermined interval maintained in the vertical direction.

In this way, the front base 11 and the rear base 12 are arranged such that the rear base frame 31 has guides extending in the longitudinal direction of the vehicle on both sides in the rear base accommodation space 113 of the front base frame 21, as shown in FIG. It is inserted through a slide guide G consisting of a rail and a guide roller. Thus, the front base frame 21 can slide in the longitudinal direction of the vehicle C along the outer surface of the rear base frame 31, and the front board 111 can also slide in the longitudinal direction of the vehicle from directly below the rear board 121. Assembled as possible. As a result, the vehicle C is configured such that the front base 11 can extend and contract with respect to the rear base 12. That is, by sliding the front base 11 forward in the longitudinal direction of the vehicle with respect to the rear base 12, the front base frame 21, the rear base frame 31, the front boat 111, and the rear board 121, respectively, Arranged one after the other. Note that this state is maintained by a locking device (not shown). As a result, the wheelbase of the vehicle body C1 is extended to the maximum, and the vehicle body C1 is placed in a riding mode. In addition, from this state, the front base 11 is slid backward in the longitudinal direction of the vehicle with respect to the rear base 12, so that the front base frame 21, the rear base frame 31, the front boat 111, the rear board 121 , respectively, are polymerized one above the other. Note that this state is maintained by a locking device (not shown). As a result, the wheelbase of the vehicle body C1 is shortened to the minimum, and the vehicle body C1 takes the form of a cart or a walking auxiliary vehicle.

In this vehicle C, as shown in FIG. 1 and FIG. It is installed so as to be rotatable between a seating position where the seating surface is placed facing upward of the vehicle body C1 and a retracted position where the seating surface is evacuated toward the front of the vehicle body C1. The vehicle body C1 is operatively connected to this rotatable leg portion 5, and by rotating the seat 4 to the seating position, the vehicle body C1 is changed to a riding state, and by rotating the seat 4 to the retracted position, the vehicle body C1 is changed to a cart or a riding position. The vehicle has been changed to a walking auxiliary vehicle, which is held or released by the aforementioned locking device.

FIGS. 1, 2, 6, and 7 show examples of how this vehicle C is used, together with the functions of each part of the moving base.

1 and 6 show the riding state of this vehicle C, in which the legs 5 of the seat 4 are in the seating position of the seat 4, and the front base 11 of the vehicle body C1 is connected to the rear base 12 from the front of the vehicle C in the longitudinal direction. It is extended to the maximum, and the vehicle body C1 is in a riding configuration. This riding configuration is maintained by a locking device.

In this riding configuration, the front board 111 arranged in the front and rear along with the front base 11 and the rear base 12 is used as a foot rest, and the front board 111 and the rear board 121 are used as luggage rests. In this case, the front and rear boards 111 and 121 are placed below the main body of the vehicle C, so when the vehicle C is in riding mode, luggage can be stored on the front and rear luggage racks located below the main body of the vehicle C. Can be carried stably. Further, the controller that controls the electric drive of the wheels can be protected from water such as rainwater, external impacts such as flying stones, and other external forces. In the case of this controller, since it is housed in the controller box 33 and placed inside the rear base 12, it can exhibit excellent protection performance against water and external forces.

Further, in this riding mode, the tip inclined portion 111f of the tip portion 111f of the front board 111 is used as a footrest. With this footrest, it is possible to make it easier to keep your feet on when the vehicle C is decelerating while running. In addition, the inclined end portions 111f and 121f of the front and rear boards 111 and 121 are used as luggage prevention parts. This cargo flying-out prevention portion prevents the cargo on the front and rear boards 111 and 121 from flying forward when the vehicle C decelerates while traveling. Furthermore, both side inclined portions 111s and 121s provided on both side portions 111s and 121s of the front board 111 and the rear board 121, respectively, are used as parts for preventing cargo from flying out. This cargo flying-out prevention portion prevents the cargo on the front and rear boards 111 and 121 from flying out to the side when the vehicle C turns while running.

Furthermore, in this riding configuration, outside air is passed through the ventilation passages S1 and S2 between the front base 11 and the rear base 12 and between the front base 11 and the rear board 121 of the upper part of the rear base 12. is introduced below the vehicle body C1. In this case, the front and rear boards 111 and 121, that is, the luggage racks, are located at the top of the front and rear base frames 21 and 31, so that wind (outside air) is directed to the rear base frame 31 where the heat source is located. It can be directed towards. By guiding this airflow of outside air, heat near the front board storage space 123 can be efficiently radiated to the outside of the vehicle body C1. In particular, in this vehicle C, a controller that controls the electric drive of the wheels is arranged inside the rear base 12. On the other hand, the air passages S1 and S2 between the front and rear bases 11 and 12, between the front board 111, and the rear board 121 serve as airflow guides that guide the running wind upward to the rear base 12. Become. While drawing in the air inside the rear base 12, this air can be guided to the rear of the vehicle body C1 via each ventilation path S1 and S2, and can be released to the outside air. Further, in this case, the front base 11 and the rear base 12 are arranged in front of each other, the front base 11 is not present between the rear base 12 and the rear board 121, and the ventilation passage S2 is expanded. Since the opening 310 is provided at the tip of the upper frame 31u of the rear base frame 31, the heat generated within the rear base frame 31 is guided upward to the rear base 12 more efficiently, and the controller is used in vehicles with a high load. With riding configuration C, heat can be dissipated more effectively. This prevents abnormal operation of the controller due to heat buildup inside the rear base 12.

On the other hand, since the front and rear boards 111 and 121, that is, the baggage storage stand, and the controller box 33, that is, the heat source, are separated from each other, it is possible to process fresh foods placed on the baggage storage stand. Things that don't warm well are prevented from being heated.

2 and 7 show this vehicle C in the form of a cart or a walking aid vehicle, in which the legs 5 of the seat 4 are in the retracted position, and the front base 11 of the vehicle body C1 is retracted to the rear base 12 to the minimum. The vehicle body C1 is in the form of a cart or a walking auxiliary vehicle. This cart or walker configuration is held in place by a locking device.

In this cart or walking auxiliary vehicle configuration, a front board 111 and a rear board 121, which are vertically stacked together with the front base 11 and the rear base 12, are used as a luggage stand. In this case, the front and rear boards 111 and 121 are arranged vertically overlapping each other in the lower part of the body of the vehicle C, so even if the vehicle C is in the form of a cart or a walking auxiliary vehicle, the boards 111 and 121 on the lower side of the body of the vehicle C are arranged in a vertically overlapping manner. The luggage racks are stacked one above the other, allowing you to carry your luggage in a stable manner. Further, the controller that controls the electric drive of the wheels can be protected from water such as rainwater, external impacts such as flying stones, and other external forces. In the case of this controller, since it is housed in the controller box 33 and placed inside the rear base 12, it can exhibit excellent protection performance against water and external forces.

In addition, in this cart or walking aid vehicle configuration, air passages S1 and S2 are provided between the front base 11 and the rear base 12 and between the front base 11 and the rear board 121 of the upper part of the rear base 12. Through this, outside air is introduced below the vehicle body C1. By guiding this airflow of outside air, heat near the front board storage space 123 can be radiated to the outside of the vehicle body C1. In particular, in this vehicle C, the controller that controls the electric drive of the wheels is arranged inside the rear base 12, so that between the front and rear bases 11 and 12, the front board 111, and the rear board 121, The ventilation passages S1 and S2 in between serve as airflow guides that guide the running wind upwards from the rear base 12, and while this draws in the air inside the rear base 12, it passes through the ventilation passages S1 and S2, and flows into the vehicle body C1. It can be guided to the rear and opened to the outside air. This prevents abnormal operation of the controller due to heat buildup inside the rear base 12.

As described above, in the vehicle C of this specific example, the front base 11 includes the rear base housing space 113 and the front board 111. The rear base accommodating space 113 has an opening 112 on the rear surface so that the rear base 12 can be inserted and removed, and can accommodate the rear base 12. The front board 111 is arranged above the rear base accommodation space 113. The rear base 12 includes a housing portion 122 and a rear board 121. The accommodated portion 122 can be accommodated in the rear base accommodation space 113 of the front base 11 . The rear board 121 is disposed above the accommodated portion 122 with a front board storage space 123 in which the front board 111 can be inserted and removed and stored. In this manner, in the riding mode of the vehicle C, the rear base 12 extends from the rear base storage space 113 of the front base 11 through the opening 112, and extends from the front board storage space 123 on the rear base 12 to the front side. A front board 111 at the top of the base 11 extends. Thereby, the front board 111 and the rear board 121 are arranged in the front and back together with the front base 11 and the rear base 12. In addition, when the vehicle C is in the form of a cart or walking aid, the rear base 12 is stored in the rear base storage space 113 of the front base 11 through the opening 112, and in the front board storage space at the top of the rear base 12. The front board 111 on the upper part of the front base 11 is housed in 123 . As a result, the front board 111 and the rear board 121 are arranged to overlap vertically together with the front base 11 and the rear base 12. With this arrangement of the boards 111 and 121, it is possible to arrange the front and rear boards 111 and 121 below the vehicle C body and use these boards 111 and 121 as a luggage stand. can. This luggage rack located below the main body of the vehicle C allows the luggage to be carried stably whether the vehicle C is in the form of a ride, a cart, or a walking auxiliary vehicle, and is protected from water such as rainwater. The controller can be protected from external impacts such as flying stones and other external forces. Further, in this riding mode, the front board 111 can be used as a footrest when the vehicle C is running, and can also be used as a footrest and a luggage stand.

In this vehicle C, outside air is introduced and distributed between the front base 11 and the rear base 12 and between the front base 11 and the upper rear board 121 of the rear base 12. It has gaps S1 and S2 as ventilation paths. Whether this vehicle C is in a riding form, a cart form, or a walking aid vehicle form, outside air is introduced below the car body C1 through each gap (ventilation path) S1, S2, and by guiding the airflow of this outside air, one board is stored. Heat near the space 123 can be radiated to the outside of the vehicle body C1.

The vehicle C also includes a controller that controls the electric drive of the wheels, and the controller is disposed inside the rear base 12. In this vehicle C, whether in riding form, cart form, or walking auxiliary vehicle form, air passages S1 and S2 between the front and rear bases 11 and 12, and between the front board 111 and the rear board 121 prevent the running wind. It serves as a guide for the airflow directed above the rear base 12. While drawing in the air inside the rear base 12, this air can be guided to the rear of the vehicle body C1 via each ventilation path S1 and S2, and can be released to the outside air. This makes it possible to prevent abnormal operation of the controller due to heat buildup inside the rear base 12 on which the controller is placed.

Further, in this vehicle C, the front base 11 and the rear base 12 have tip inclined portions 111f and 121f, respectively, which are vertically stackable in the form of a cart or a walking auxiliary vehicle. In this riding configuration of the vehicle C, these tip inclined portions 111f and 121f can be used as footrests, making it easier to keep your feet on when decelerating while the vehicle C is running. In addition, whether the vehicle C is in the form of a riding vehicle, a cart, or a walking auxiliary vehicle, these tip inclined portions 111f and 121f can be used as baggage prevention portions. The sloped portions 111f and 121f can prevent the luggage on the front and rear boards 111 and 121 from flying out forward. When the front board 111 on the upper part of the front base 11 is stored in the front board storage space 123, these tips 111f and 121f can be stacked vertically, and the front and rear bases 11 and 12 , the front and rear boards 111 and 121 can be housed and housed as a whole in a compact manner.

Furthermore, in this vehicle C, both sides 111s and 121s of the front base 11 and the rear base 12 are provided with sloped parts 111s and 121s on both sides, respectively, which can be stacked vertically in the form of a cart or a walking aid vehicle. have In the riding mode of the vehicle C, these side inclined portions 111s and 121s can be used as footrests, making it easier to keep your feet on when turning while the vehicle C is running. In addition, whether the vehicle C is in the form of a riding vehicle, a cart, or a walking aid vehicle, these side sloped portions 111s and 121s can be used as parts for preventing luggage from flying out. The sloped portions 111s and 121s can prevent the luggage on the front and rear boards 111 and 121 from jumping out to the side. Furthermore, when the vehicle C is in the form of a cart or a walking aid vehicle, when the front board 111 on the upper part of the front base 11 is stored in the front board storage space 123 on the upper part of the rear base 12, the front board 111 on the front side and the rear side Since the side slopes 111s and 121s of each board 111 and 121 can be stacked vertically, the front and rear bases 11 and 12 and the front and rear boards 111 and 121 can be accommodated compactly as a whole. It can be stored.

In this specific example, the controller box 33 which is a heat source is arranged on the rear base 12, but it may be arranged inside the front base 11. Even in this case, the same effects as in the above specific example can be achieved.

Further, in this specific example, one base and one board, the other base and the other board are respectively illustrated as a front base and a front board, a rear base and a rear board. Conversely, one base and one board, the other base and the other board may be respectively configured as a rear base and a rear board, a front base and a front board, and thus Also, the same effects as those of the above specific example can be achieved.

In addition, it is possible to appropriately replace the components in the embodiments described above with well-known components without departing from the spirit of the present invention.

C Small electric vehicle (vehicle)
1 Moving base 11 Front base (one base)
110 Front wheel 111 Front board (one board)
111f Tip part (tip inclined part)
111s side part (side slope part)
112 Opening 113 Rear base accommodation space (other base accommodation space)
12 Rear base (other base)
120 Rear wheel 33 Controller box 121 Rear board (other board)
121f Tip part (tip inclined part)
121s side part (side slope part)
122 Accommodated section 123 Front board storage space (one board storage space)
S1 Gap (ventilation path)
S2 Gap (ventilation path)

Claims (5)

It has a front base having a front wheel and a rear base having a rear wheel, and the front base and the rear base are extendable and retractable in the front-rear direction, and includes a movable base configured to make the wheel base variable. A small electric vehicle that can be changed into a riding mode in which the user drives the vehicle, and a cart or walking aid vehicle in which the user pushes the vehicle by hand,
Either one of the front base and the rear base has an opening on a surface of the one base facing the other base in the front and back so that the other base can be inserted and removed, and the other base can be accommodated; comprising: a second base housing space capable of housing the other base; and one board disposed above the other base housing space;
The other base includes an accommodated part that can be accommodated in the other base accommodation space of the one base, and one board that allows the one board to be inserted into and removed from the upper part of the accommodated part. and the other board arranged with a storage space in between,
In the riding mode, the other base extends from the other base storage space of the one base through the opening, and extends from the one board storage space at the top of the other base to the top of the one base. The one board extends, and the one board and the other board are arranged in front and behind together with the one base and the other base,
In the cart or walking aid vehicle, the other base is stored in the other base storage space of the one base through the opening, and the other base is stored in the one board storage space in the upper part of the other base. The one board is stored on the upper part of the base, and the one board and the other board are arranged vertically overlapping with the one base and the other base.
A small electric vehicle characterized by: Claim 1: Between one base and the other base, and between the one base and the other board above the other base, gaps are provided as ventilation paths through which outside air is introduced and circulated. A small electric vehicle described in . The small electric vehicle according to claim 1 or 2, further comprising a controller for controlling electric drive of the wheels, the controller being arranged inside the other base. The small electric vehicle according to any one of claims 1 to 3, wherein the one board and the other board each have a tip inclined portion that can be stacked up and down in the form of a cart or a walking auxiliary vehicle. A small electric vehicle according to any one of claims 1 to 4, wherein the sides of one board and the other board each have side slope parts that can be stacked up and down in the form of a cart or a walking auxiliary vehicle.

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