JP7447596B2 - electric vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric vehicle that includes a movable base that can be driven by electric drive and a seat that has a seating portion, and that the movable base is configured so that the wheelbase between its front wheels and rear wheels can be expanded and contracted.

BACKGROUND ART Electric vehicles such as electric wheelchairs and electric carts that can be driven by driving means such as motors have become popular as transportation means for users such as elderly people and people requiring care. Such electric vehicles are sometimes called "senior cars." Typically, an electric vehicle includes a movable base that is electrically movable and a seat having a seating portion, and a user can move while seated on the seating portion of the seat of the electric vehicle.

Additionally, electric vehicles may be configured to be foldable. In this case, the movable base of the electric vehicle is configured so that the wheelbase between its front wheels and rear wheels can be expanded or contracted. Specifically, the electric vehicle is configured to be deformable into a deployed state in which the wheel base of the moving base is expanded and a folded state in which the wheel base is reduced from the deployed state. In the unfolded state, the electric vehicle allows a user to board the vehicle and provides stability while driving, and in the folded state, the electric vehicle can turn in a small radius to be suitable for movement by hand pushing from the rear of the electric vehicle. becomes.

Such an electric vehicle requires a footrest on which the feet of a user sitting on the seat are placed when in the unfolded state. An example of an electric vehicle having a footrest includes a vehicle body configured to allow expansion and contraction of the wheelbase between front wheels and rear wheels, a seat having a seating portion and disposed on the vehicle body, and a vehicle horizontal direction. and a floor (corresponding to a footrest) formed flat along the vehicle body, and the floor is arranged at the front of the vehicle body so that the feet of a user sitting on the seating part of the seat can be placed when the vehicle body is expanded. , a small electric vehicle whose front wheels are attached to the underside of the floor. (For example, see Patent Document 1.)

Japanese Patent Application Publication No. 2016-168153

Here, when lateral acceleration is applied due to cornering of the electric vehicle, the user stretches his/her feet on the footrest in order to counteract the lateral acceleration. However, in the example of the electric vehicle described above, the flat floor corresponds to the footrest. Therefore, the user's feet tend to slide sideways on the footrest in the vehicle width direction due to lateral acceleration. In other words, it is difficult for the user to keep his or her feet on the footrest so as to counteract the lateral acceleration. Furthermore, the posture of a user riding such an electric vehicle becomes unstable. Additionally, since the footrest is subject to loads based on the user's weight and lateral acceleration, it is also important to reinforce the footrest.

In the example of the electric vehicle described above, considering the case where the user is an elderly person, a person in need of care, etc., it is desirable to reduce the height of the footrest in order to make it easier for the user to get on and off the vehicle. However, as the height of the footrest becomes lower, the diameter of the front wheel attached to the lower surface of the footrest becomes smaller. When the diameter of the front wheels becomes smaller, it becomes difficult for an electric vehicle to overcome bumps when moving forward. In other words, there is a possibility that sufficient running performance of the electric vehicle may not be obtained.

In one example of the electric vehicle described above, the electric vehicle is required to secure a space for placing luggage such as a shopping basket. Therefore, in order to reduce the size of an electric vehicle so that it can turn around quickly, it is desirable to efficiently secure a space for installing a footrest and a space for placing luggage.

Taking these circumstances into consideration, it is possible to improve the stability of the posture of the user riding the electric vehicle, prevent a decline in the driving performance of the electric vehicle, and efficiently increase the strength of the footrest. It is desired that the installation space for the footrest and the space for placing luggage can be efficiently secured.

In order to solve the problem, an electric vehicle according to one aspect includes a moving base configured to be able to travel by electric drive, and a seat disposed on the moving base, wherein the moving base has a front side having front wheels. a base, and a rear base having a rear wheel, the rear base being disposed rearward of the vehicle with respect to the front base, and the movable base expanding a wheel base between the front wheels and the rear wheels. The front and rear bases are configured to be movable relative to each other in order to be deformable between an enlarged state and a reduced state in which the wheel base is smaller than the enlarged state, and the The seat is an electric vehicle including a seating portion having a seating surface, and the front base includes a front body forming a frame of the front base, a reinforcing member disposed along the width direction of the vehicle, and a reinforcing member arranged from above the vehicle. a front board disposed to overlap the reinforcing member, the front main body supports the reinforcing member and the front board, and the front main body extends in the longitudinal direction of the vehicle so as to open toward the rear of the vehicle. The rear base has a rear opening formed at a rear end, and the rear base has a rear body forming a skeleton of the rear base, and the rear body has a rear opening formed at a rear end thereof, and the rear body has a rear body that forms a skeleton of the rear base. According to this movement, the front body can be slid in the longitudinal direction of the vehicle from the rear of the vehicle through the rear opening of the front body and overlap the front body in the longitudinal direction of the vehicle, and the With the seating surface facing upward of the vehicle and the movable base in an expanded state, the front end of the front board in the longitudinal direction of the vehicle and the reinforcing member are arranged further forward of the vehicle than the front end of the seating portion in the longitudinal direction of the vehicle, The reinforcing member has a lateral inclined part disposed in a lateral region of the front main body in the vehicle width direction, and an arm part extending outward in the vehicle width direction from the lateral inclined part of the reinforcing member, The front board has a lateral slope portion disposed in a lateral region of the front main body in the vehicle width direction, and each of the reinforcing member and the lateral slope portion of the front board The reinforcing member is inclined so as to rise upwardly of the vehicle as it goes outward, and the lateral inclined part of the reinforcing member is arranged along the lateral inclined part of the front board, and the arm part of the reinforcing member is arranged along the lateral inclined part of the front board. The reinforcing member protrudes outward from the front body in the vehicle width direction, and the front wheel is attached to the arm portion of the reinforcing member.
An electric vehicle according to another aspect includes a movable base configured to be able to travel by electric drive, and a seat disposed on the movable base, wherein the movable base includes a front base having a front wheel and a rear wheel. a rear base having an expanded state in which the rear base is disposed at the rear of the vehicle with respect to the front base, and the movable base is in an expanded state in which a wheel base between the front wheels and the rear wheels is expanded; The front and rear bases are configured to be movable relative to each other so that the base can be deformed between the expanded state and the contracted state,
The seat is an electric vehicle including a seating portion having a seating surface, and the front base includes a front body forming a frame of the front base, a reinforcing member disposed along the width direction of the vehicle, and an upper portion of the vehicle. and a front board disposed so as to overlap the reinforcing member, the front main body supporting the reinforcing member and the front board, and the rear base supporting the front board when the movable base is in a contracted state. a rear board positioned above the vehicle with respect to the board and configured to accommodate the front board, and with the seating surface facing upward of the vehicle and the movable base in an enlarged state, the front board The front end of the board in the vehicle longitudinal direction and the reinforcing member are arranged further forward of the vehicle than the front end of the seating section in the vehicle longitudinal direction, and the reinforcing member is arranged in a lateral region of the front main body in the vehicle width direction. and an arm portion extending outward in the vehicle width direction from the side slope portion of the reinforcing member, and the front board is disposed in a lateral region of the front body in the vehicle width direction. each of the reinforcing member and the lateral inclined part of the front board is inclined so as to rise upwardly of the vehicle as it goes outward in the vehicle width direction; A lateral inclined part is arranged along the lateral inclined part of the front board, an arm part of the reinforcing member projects outward in the vehicle width direction from the front main body, and the front wheel is arranged along the lateral inclined part of the front board. It is attached to the arm of the reinforcing member.

In the electric vehicle according to one aspect, the stability of the posture of a user riding the electric vehicle can be improved, the driving performance of the electric vehicle can be prevented from deteriorating, and the strength of the footrest can be efficiently improved. This also makes it possible to efficiently secure the installation space for the footrest and the space for placing luggage.

FIG. 1 is a perspective view schematically showing an electric vehicle in an expanded state according to an embodiment. FIG. 2 is a side view schematically showing an electric vehicle according to an embodiment in an expanded state. FIG. 3 is a front view schematically showing an electric vehicle according to an embodiment in an expanded state. FIG. 4 is a perspective view schematically showing an electric vehicle in a folded state according to an embodiment. FIG. 5 is a side view schematically showing the electric vehicle according to one embodiment in a folded state. FIG. 6 is a front view schematically showing the electric vehicle according to the embodiment in a folded state. FIG. 7 is a perspective view schematically showing the lower portion of the electric vehicle according to one embodiment in the expanded state and with the front cover of the front base omitted. FIG. 8 is a cross-sectional perspective view schematically showing the front portion of the electric vehicle shown in FIG. 7, taken along line AA in FIG.

An electric vehicle according to one embodiment will be described below. The electric vehicle 1 according to the present embodiment can be transformed into a drive mode in which it is used as an electric wheelchair, as shown in FIGS. 1 to 3, and a push mode, in which it is used as an electric walking aid, as shown in FIGS. 4 to 6. It is. Such an electric vehicle 1 can also be called an electric walking auxiliary vehicle having the function of an electric wheelchair. In particular, as shown in FIGS. 1 to 3, the electric vehicle 1 can be configured to be used as a one-person electric wheelchair in drive mode.

However, electric vehicles are not limited to this. For example, an electric vehicle can be configured to be used as a shopping cart, trolley, etc. in push mode. The electric vehicle can be configured to be used as an electric cart or the like in a drive mode. An electric vehicle can also be configured to be used in only one of push mode and drive mode. In the following, an electric vehicle will be simply referred to as a "vehicle" as necessary.

In the drawings used to explain this embodiment, directions based on the vehicle are shown as follows. In FIGS. 1, 2, 4, 5, 7, and 8, the front of the vehicle and the rear of the vehicle are indicated by a one-sided arrow F and a one-sided arrow B, respectively. In FIGS. 1, 3, 4, and 6 to 8, the left side and right side when facing the front of the vehicle are indicated by a single-sided arrow L and a single-sided arrow R, respectively. The vehicle width direction is indicated by a one-sided arrow L and a one-sided arrow R. Note that in the following description, the left side and right side refer to the left side and right side, respectively, when facing the front of the vehicle in this manner. Further, in FIGS. 1 to 8, the upper side of the vehicle and the lower side of the vehicle are indicated by a one-sided arrow U and a one-sided arrow D, respectively. Note that the vehicle horizontal direction is an in-plane direction along the vehicle longitudinal direction and the vehicle width direction.

“Overview of electric vehicles”
An outline of the electric vehicle 1 according to the present embodiment will be described with reference to FIGS. 1 to 8. That is, the electric vehicle 1 can be roughly configured as follows.

As shown in FIGS. 1 to 8, the electric vehicle 1 has a movable base 10 configured to be movable by electric drive. The moving base 10 has a front base 20. The front base 20 has a front wheel 21. The movable base 10 has a rear base 30 arranged at the rear of the vehicle with respect to the front base 20. The rear base 30 has a rear wheel 31. As shown in FIGS. 1 to 3, the moving base 10 is in an enlarged state in which the wheel base H between the front wheels 21 and the rear wheels 31 is enlarged, and as shown in FIGS. 4 to 6, the wheel base H is in this enlarged state. The front and rear bases 20 and 30 are configured to be movable relative to each other in order to be deformable between a reduced state and a reduced state. The relative movement of the front and rear bases 20 and 30 is relative sliding movement in the longitudinal direction of the vehicle.

As shown in FIGS. 1 to 6, the vehicle 1 includes a seat 40 placed on a moving base 10. As shown in FIGS. The seat 40 has a seating portion 41 configured to allow a user to sit on it. The seating portion 41 has a seating surface 42 used for seating a user.

As shown in FIGS. 1 to 8, the front base 20 has a front body 22 forming its skeleton. The front base 20 has a reinforcing member 50 arranged along the vehicle width direction. The front base 20 has a front board 60 arranged so as to overlap the reinforcing member 50 from above the vehicle. The front main body 22 supports the reinforcing member 50 and the front board 60.

As shown in FIGS. 1 to 3, when the seating surface 42 of the seating portion 41 of the seat 40 faces upward of the vehicle and the movable base 10 is expanded, the front end of the front board 60 in the longitudinal direction of the vehicle and the reinforcing member 50 is arranged further forward of the vehicle than the front end of the seating portion 41 in the vehicle longitudinal direction.

As shown in FIGS. 1 to 8, the reinforcing member 50 has a lateral inclined portion 51 disposed in a lateral region of the front main body 22 in the vehicle width direction. The lateral inclined portion 51 of the reinforcing member 50 is inclined so as to rise upwardly of the vehicle as it goes outward in the vehicle width direction. The reinforcing member 50 has an arm portion 52 extending outward in the vehicle width direction from a side slope portion 51 thereof. The arm portion 52 of the reinforcing member 50 protrudes from the front main body 22 in the vehicle width direction. The front wheel 21 is attached to an arm portion 52 of a reinforcing member 50.

The front board 60 has a lateral inclined portion 61 arranged in a lateral region of the front main body 22 in the vehicle width direction. The lateral inclined portion 61 of the front board 60 is also inclined so as to rise upwardly of the vehicle as it goes outward in the vehicle width direction. The lateral inclined portion 51 of the reinforcing member 50 is arranged along the lateral inclined portion 61 of the front board 60.

Furthermore, the electric vehicle 1 can be roughly configured as follows. As shown in FIGS. 1, 2, 4, 5, 7, and 8, the length of the front board 60 in the vehicle longitudinal direction is longer than the length of the reinforcing member 50 in the vehicle longitudinal direction. A front board 60 extends from the reinforcing member 50 toward the rear of the vehicle. The front board 60 is made of resin.

As shown in FIGS. 1-8, the rear base 30 has a rear board 70 that can be used as a loading platform. As shown in FIGS. 4 to 6, the rear board 70 is located above the vehicle with respect to the front board 60 when the movable base 10 is in the contracted state. The rear board 70 is also configured to accommodate the front board 60 in the reduced state of the moving base 10. As shown in FIGS. 1 to 8, the rear board 70 has a bottom portion 71 disposed in the central region of the rear base 30 in the horizontal direction of the vehicle. The rear board 70 has a peripheral inclined portion 72 arranged in a peripheral region located around the central region of the rear base 30 in the vehicle horizontal direction. The peripheral inclined portion 72 is inclined so as to rise upwardly in the vehicle as it moves away from the central region of the rear base 30 in the vehicle horizontal direction.

Furthermore, as shown in FIGS. 1 to 3, FIG. 7, and FIG. 8, the front board 60 has a bottom portion 62 disposed in a central region of the front main body 22 in the vehicle width direction. As shown in FIGS. 1, 4, 7, and 8, the front board 60 has a front inclined portion 63 disposed at the front edge region of the front main body 22 in the longitudinal direction of the vehicle. The front inclined portion 63 is inclined so as to rise upwardly of the vehicle as it goes toward the front of the vehicle.

"Details of electric vehicles"
Referring to FIGS. 1 to 6, the electric vehicle 1 can be configured in detail as follows. As shown in FIGS. 1 to 5, in the electric vehicle 1, the seating portion 41 of the seat 40 has a back surface 43 facing opposite to the seating surface 42. As shown in FIGS. As shown in FIGS. 1 to 3 and 5, the vehicle 1 includes a battery 2 configured to be able to supply electric power used for electric drive. The battery 2 is arranged on the back surface 43 of the seating portion 41 of the seat 40. The seat 40 has two seating positions, as shown in FIGS. 1 to 3, with the seating surface 42 facing upward in the vehicle, and a seating position in which the seating portion 41 is positioned toward the front of the vehicle from the seating position, as shown in FIGS. 4 to 6. It is configured to be movable between the retracted position and the retracted position.

As shown in FIGS. 1 to 3, in the drive mode of the vehicle 1, the movable base 10 can be expanded and the seat 40 can be placed in the seating position. Such a drive mode can also be called a deployed state. In the drive mode, a space for placing luggage is secured between the rear base 30 and the battery 2 disposed in the seating portion 41 of the seat 40 in the vehicle vertical direction. In this luggage loading space, a rear board 70 configured as a loading platform can be installed on the rear base 30.

As shown in FIGS. 4 to 6, in the push mode of the vehicle 1, the movable base 10 can be brought into a contracted state, and the seat 40 can be placed in the retracted position. Such a push mode can also be called a folded state. In the push mode, a space for placing luggage similar to that in the drive mode is secured above the vehicle with respect to the rear base 30 and behind the vehicle with respect to the battery 2 disposed on the back surface 43 of the seating portion 41 of the seat 40. Ru. In particular, when the vehicle 1 changes between such drive mode and push mode, the change of the moving base 10 between the enlarged state and the reduced state and the movement of the seat 40 between the seating position and the retracted position are linked. good.

As shown in FIGS. 1 to 6, the vehicle 1 includes an electric motor 3 used to electrically drive a moving base 10. As shown in FIGS. The electric motor 3 can be two motors 3a configured to drive the two rear wheels 31, respectively. The vehicle 1 has a control device 4 used to control the vehicle 1. The control device 4 is configured to be able to control the electric motor 3. The vehicle 1 includes a front operating device 5 configured to be operable by a user seated on a seat 40, particularly in drive mode. The vehicle 1 has a rear operating device 6 configured to be operable by a user located at the rear of the vehicle 1, particularly in push mode.

Although not specifically illustrated, the battery 2 is electrically connected to two motors 3a of the electric motor 3, a control device 4, and front and rear operating devices 5, 6. The battery 2 is capable of supplying power to the two motors 3a of the electric motor 3, the control device 4, and the front and rear operating devices 5 and 6.

Furthermore, in addition to the battery 2, the control device 4 is electrically connected to two motors 3a of the electric motor 3, a front operating device 5, and a rear operating device 6. The control device 4 is configured to be able to control the two motors 3a according to inputs from the front or rear operating devices 5 and 6.

Further, as shown in FIGS. 1 to 3, the seat 40 is arranged so that the seating surface 42 of the seating portion 41 substantially extends along the horizontal direction of the vehicle when the seat 40 is in the seating position. As shown in FIGS. 4 to 6, when the seat 40 is in the retracted position, the seating surface 42 of the seating portion 41 is oriented at a predetermined angle with respect to a plane extending in the vehicle vertical direction and the vehicle width direction. It would be good if it were placed. Such an angle may be less than or equal to about 30° in absolute value. However, the angle of the seating surface is not limited to this. Furthermore, as shown in FIGS. 1 to 6, even when the seat 40 is in either the seating position or the retracted position, the front end area 41a of the seating part 41 is larger than the rear end area 41b of the seating part 41 in the seat longitudinal direction. position at the front of the vehicle.

Here, in this embodiment, the direction based on the sheet 40 is defined as follows. The front of the seat and the rear of the seat substantially correspond to the front of the vehicle and the rear of the vehicle, respectively, when the seat 40 is in the seating position. The left side of the seat and the right side of the seat substantially coincide with the left side of the vehicle and the right side of the vehicle, respectively. The sheet width direction is defined by the left side of the sheet and the right side of the sheet. The directions in which the seating surface 42 and back surface 43 of the seating portion 41 face are defined as a seat upper direction and a seat lower direction, respectively. The upper part of the seat and the lower part of the seat substantially correspond to the upper part of the vehicle and the lower part of the vehicle, respectively, when the seat 40 is in the seating position.

As shown in FIGS. 1 to 6, in the vehicle 1, the seat 40 has leg portions 44 configured to be able to support the seating portion 41. As shown in FIGS. In this embodiment, the seat 40 has two legs 44 spaced apart from each other in the seat width direction. In the following, unless the two legs 44 are specifically mentioned, one of the two legs 44 will be representatively explained. Note that the seat can also have only one of the two legs.

The two leg portions 44 can be configured to be substantially symmetrical in the vehicle width direction. Each leg portion 44 is attached to the front base 20 and the frame 90 so that the seat 40 can be moved between a seating position and a retracted position.

Each leg 44 has a frame attachment area 44a that is attached to the frame 90 to allow the leg 44 to pivot relative to the frame 90. Each leg 44 has a base attachment area 44b that attaches to the front base 20. More specifically, the base attachment area 44b of each leg 44 allows the leg 44 to pivot relative to the frame 90 and allows the leg 44 to follow the back and forth movement of the front base 20 relative to the rear base 30. It is attached to the front base 20 to make it possible.

The frame attachment area 44a of each leg portion 44 is located midway between the leg portions 44 in the seat vertical direction. The base attachment area 44b of each leg 44 is located at the lower end of the leg 44 in the seat vertical direction. The frame attachment area 44a of each leg 44 is located between the seat 41 and the base attachment area 44b of this leg 44.

As shown in FIGS. 1 to 6, the vehicle 1 includes an armrest 80 having an armrest main body 81 located outward in the vehicle width direction and above the vehicle with respect to the seating surface 42. In this embodiment, the vehicle 1 has two armrests 80 located on both sides of the seating surface 42 in the vehicle width direction. Note that the vehicle can also have only one of the two armrests.

The two armrests 80 can be configured to be substantially symmetrical in the vehicle width direction. The armrest main body 81 of each armrest 80 is configured so that the elbow of a user sitting on the seating portion 41 can be placed on the armrest body 81 when the seat 40 is in the seating position. The armrest main body 81 has a tip 82 facing toward the front of the vehicle. Each armrest 80 has a grip 83 protruding from a tip 82 of an armrest body 81 thereof. The grip 83 of each armrest 80 projects upward from the tip 82 of the armrest main body 81 of this armrest 80 .

One of the two grips 83 is configured as the front operating device 5. A user can operate the vehicle 1 by operating such a front operating device 5. The front operating device 5 can be configured as a joystick. In this case, one of the two grips 83 is movable relative to the armrest main body 81. Further, the other of the two grips 83 can be movable relative to the armrest main body 81 or fixed relative to the armrest main body 81. Note that both of the two grips can also be configured as front operating devices that can be operated by the user. In this case, the two grips can be configured so that it is possible to select which one of them to use as the front operating device.

As shown in FIGS. 1 to 6, the vehicle 1 has a frame 90 attached to the rear base 30. As shown in FIGS. The frame 90 is located so as to be spaced apart from or adjacent to the rear end area 41b of the seating portion 41 of the seat 40 toward the rear of the vehicle when the seat 40 is placed in the seating position. Frame 90 supports armrest 80. The frame 90 also supports the rear operating device 6 from below the vehicle. Further, the rear operating device 6 can be attached to the upper end of the frame 90 in the vehicle vertical direction.

The frame 90 is arranged above the rear base 30 of the vehicle. The frame 90 has two side portions 91 spaced apart from each other in the vehicle width direction. The two side parts 91 are attached to the rear main body 32 of the rear base 30, which will be described later.

"Movement-based details"
Referring to FIGS. 1 to 6, the moving base 10 can be configured in detail as follows. The front base 20 of the moving base 10 has two front wheels 21 spaced apart in the vehicle width direction. The front end of the front base 20 is arranged further forward of the vehicle than each front wheel 21. The rear base 30 of the moving base 10 has two rear wheels 31 spaced apart in the vehicle width direction.

However, the moving base can be configured such that the front base has one or more front wheels and the rear base has two or more rear wheels. The moving base can also be configured such that the front base has two or more front wheels and the rear base has one or more rear wheels.

An electric motor 3 and a control device 4 are arranged on the rear base 30. The two rear wheels 31 can be driven independently by two motors 3a under the control of the control device 4. The vehicle 1 can be braked while the two motors 3a are stopped to prevent their rotation. That is, each rear wheel 31 serves as a driving wheel 31. On the other hand, each front wheel 21 is a driven wheel 21.

"Details of the front base"
Referring to FIGS. 1 to 8, the front base 20 can be configured in detail as follows. As shown in FIGS. 1 to 8, the front base 20 includes a front wheel assembly 24 having each front wheel 21 and a fork 23 that supports the front wheels 21. As shown in FIGS. If the front base 20 has two front wheels 21, the front base 20 will have two front wheel assemblies 24.

In each front wheel assembly 24, the fork 23 supports the front wheel 21 so that the front wheel 21 can rotate around its rotation axis 21a. Furthermore, the fork 23 is supported by the front base 20 so as to be able to pivot around its pivot axis 23a. The turning axis 23a extends substantially along the vehicle vertical direction. Such a front assembly 24 can be configured as a so-called caster.

The front main body 22 of the front base 20 is arranged between the two front wheels 21 in the vehicle width direction. The front main body 22 is also arranged between two side parts 91 of the frame 90 in the vehicle width direction. The front main body 22 is formed to extend in the vehicle longitudinal direction. The reinforcing member 50 and the front board 60 are arranged on the front main body 22. Furthermore, the reinforcing member 50 and the front board 60 can be arranged on the front edge region of the front main body 22 in the vehicle longitudinal direction.

As shown in FIGS. 7 and 8, the front main body 22 includes a hollow skeleton member 22a. The frame member 22a has two side walls 22b arranged at both outer ends in the vehicle width direction. The base attachment areas 44b of the two legs 44 of the seat 40 are attached to the two side walls 22b of the front body 22, respectively.

The frame member 22a has a rear opening 22c formed at the rear end of the frame member 22a in the longitudinal direction of the vehicle so as to open toward the rear of the vehicle. As shown in FIGS. 1 to 6, the front main body 22 has a front cover 22d formed to cover the frame member 22a from the front of the vehicle.

As shown in FIGS. 1 to 8, each arm portion 52 of the reinforcing member 50 is located above the front body 22 of the vehicle. The front base 20 includes one reinforcing member 50 having two lateral inclined parts 51 and two arm parts 52. The two side slope portions 51 are approximately symmetrical in the vehicle width direction. The two arm portions 52 are also substantially symmetrical in the vehicle width direction. However, the front base can also include two reinforcement members, each having one lateral ramp and one arm.

Each arm portion 52 is formed in a cantilever shape. The two front wheels 21 are attached to two arm portions 52, respectively. Specifically, the two forks 23 are respectively attached to the two arm portions 52 so as to be able to pivot around their pivot axes 23a. The two forks 23 are each attached to the two arm portions 52 from below the vehicle. The two front wheel assemblies 24 are located below the vehicle relative to the two arms 52, respectively.

In the front board 60, the two side slope portions 61 are each sloped so as to rise upward from the vehicle as it goes outward in the vehicle width direction from the bottom portion 62. The front board 60 is arranged so that a user seated on the seat 40 can place his or her feet on the front board 60 when the vehicle 1 is in the drive mode. The front board 60 is arranged between two side parts 91 of the frame 90 in the vehicle width direction. The front board 60 is formed into a substantially dish shape that opens toward the top of the vehicle. As shown in FIGS. 7 and 8, the front board 60 has a rear opening 64 formed at the rear end of the front board 60 in the longitudinal direction of the vehicle so as to open toward the rear of the vehicle.

In the front edge region of the front main body 22, the two side slope parts 61 and the front slope part 63 are lined up in the vehicle width direction, and the front slope part 63 is located between the two side slope parts 61 in the vehicle width direction. Located in However, in the leading edge region of the front body, instead of this arrangement, the two side slopes and the bottom are aligned in the vehicle width direction, and the bottom is arranged between the two side slopes in the vehicle width direction. You can also. In the main region located rearward of the vehicle than the leading edge region of the front body 22, two side slope portions 61 and a bottom portion 62 are lined up in the vehicle width direction, and the bottom portion 62 is located on two sides in the vehicle width direction. It is located between the horizontally inclined parts 61.

Further, the bottom portion 62 can extend in the vehicle longitudinal direction over the leading edge region and main region of the front main body 22. In this case, in the front edge region of the front main body 22, the bottom part 62 is located below the vehicle with respect to the front inclined part 63, and the bottom part 62 is located between the two side inclined parts 61 in the vehicle width direction. do. In this case, the reinforcing member 50 may be sandwiched between the front edge region of the front main body 22 and the bottom portion 62 in the vehicle vertical direction.

"Details of the rear base"
Referring to FIGS. 1 to 8, the rear base 30 can be configured in detail as follows. As shown in FIGS. 1 to 8, the rear base 30 has a rear main body 32 forming its skeleton. The rear main body 32 is arranged between the two rear wheels 31 in the vehicle width direction. The two rear wheels 31 are supported by the rear main body 32 so as to be rotatable relative to the rear main body 32 around their rotational axes 31a. As shown in FIGS. 3 and 6, the two rear wheels 31 can be located closer to the center in the vehicle width direction than the two front wheels 21.

As shown in FIGS. 1, 3, 4, and 6, the rear main body 32 is also arranged between two side portions 91 of the frame 90 in the vehicle width direction. As shown in FIGS. 7 and 8, the rear main body 32 is formed to extend in the longitudinal direction of the vehicle. The rear main body 32 has a skeleton member 32a extending in the vehicle longitudinal direction. The skeleton member 32a can be formed hollow. The frame member 32a has two side walls 32b arranged at both outer ends in the vehicle width direction. The two side walls 32b of the rear main body 32 are respectively arranged adjacent to the two side walls 22b of the front main body 22 on the center side in the vehicle width direction. The two side parts 91 of the frame 90 are attached to the two side walls 32b of the rear main body 32, respectively.

As shown in FIG. 8, the rear main body 32 passes from the rear of the vehicle through the rear opening 22c of the front main body 22, overlaps the front main body 22 in the vehicle longitudinal direction, and extends in the vehicle longitudinal direction with respect to the front main body 22. It is possible to slide. Such relative sliding movement of the front and rear main bodies 22 and 32 in the vehicle longitudinal direction is brought about by relative sliding movement of the front and rear bases 20 and 30 in the vehicle longitudinal direction.

The rear main body 32 of the rear base 30, particularly its skeleton member 32a, passes at least a portion of it from the rear of the vehicle through the rear opening 22c of the front main body 22 of the front base 20 to the inside of the front main body 22, particularly its skeleton member 32a. It is placed in a state housed inside the skeleton member 22a. The amount of overlap between the front and rear main bodies 22 and 32 in the longitudinal direction of the vehicle when the movable base 10 is in the contracted state is greater than the amount of overlap between the front and rear main bodies 22 and 32 in the longitudinal direction of the vehicle when the movable base 10 is in the enlarged state. growing.

As shown in FIGS. 1 to 8, these front and rear main bodies 22 and 32 allow the front and rear bases 20 and 30 to be relatively slidable in the longitudinal direction of the vehicle. As shown in FIGS. 7 and 8, when the front and rear bases 20 and 30 move relative to each other in the longitudinal direction of the vehicle, the two side walls 22b of the front body 22 The two side walls 32b are configured to slide on each side wall 32b.

As shown in FIGS. 1-8, the rear board 70 is disposed between two side portions 91 of the frame 90. As shown in FIGS. The rear board 70 is disposed above the rear main body 32 at a distance above the vehicle. The rear board 70 can be supported by two side parts 91 in the frame 90. However, the rear board can also be supported by elements other than the two lateral parts of the frame. A gap G is formed between the rear main body 32 and the rear board 70 in the vehicle vertical direction. During relative sliding movement of the front and rear bases 20 and 30 in the longitudinal direction of the vehicle, the front board 60 passes through the gap G.

The peripheral edge slope portion 72 of the rear board 70 has two side slope portions 73 located at both side edge regions of the rear base 30 in the vehicle width direction. In the rear board 70, the two side slope portions 73 are each sloped so as to rise upward from the vehicle as it goes outward in the vehicle width direction from the bottom portion 71. The two lateral slopes 73 on the rear board 70 can slide in the longitudinal direction of the vehicle relative to the two lateral slopes 61 on the front board 60.

As shown in FIGS. 1, 4, 7, and 8, the peripheral slope portion 72 of the rear board 70 has a front slope portion 74 located at the front edge region of the rear base 30 in the longitudinal direction of the vehicle. In the rear board 70, the front inclined part 74 is inclined so as to rise upward from the vehicle as it goes from the bottom part 71 toward the front of the vehicle. When the movable base 10 is in the contracted state, the front end of the front inclined portion 74 of the rear base 30 in the vehicle longitudinal direction is made to substantially coincide with the front end of the front inclined portion 63 of the front board 60 in the vehicle longitudinal direction. can be placed.

As shown in FIGS. 1, 2, 4, and 5, the peripheral inclined portion 72 of the rear board 70 has a rear inclined portion 75 located at the trailing edge region of the rear base 30 in the longitudinal direction of the vehicle. In the rear board 70, the rear inclined portion 75 is inclined so as to rise upwardly of the vehicle as it goes toward the rear of the vehicle from the bottom portion 71. The rear inclined portion 75 of the rear board 70 can be arranged at the rear of the vehicle with respect to the rear end of the rear main body 32 in the vehicle longitudinal direction. When the movable base 10 is in the contracted state, the rear inclined portion 75 of the rear board 70 can be arranged at the rear of the vehicle with respect to the rear opening 64 of the front board 60.

As shown in FIG. 8, the rear board 70 passes from the rear of the vehicle through the rear opening 64 of the front board 60, overlaps the front board 60 in the vehicle longitudinal direction, It is possible to slide in the direction. Such relative sliding movement of the front and rear boards 60 and 70 in the vehicle longitudinal direction is brought about by relative sliding movement of the front and rear bases 20 and 30 in the vehicle longitudinal direction.

Therefore, when the movable base 10 is in the contracted state, the rear board 70 can accommodate the front board 60 while being located above the vehicle with respect to the front board 60. The amount of overlap between the front and rear boards 60 and 70 in the longitudinal direction of the vehicle when the movable base 10 is in the contracted state is greater than the amount of overlap between the front and rear boards 60 and 70 in the longitudinal direction of the vehicle when the movable base 10 is in the expanded state. growing.

As described above, the electric vehicle 1 according to the present embodiment includes a movable base 10 configured to be able to travel by electric drive, and a seat 40 disposed on the movable base 10, and the movable base 10 supports the front wheels 21. and a rear base 30 having a rear wheel 31, the rear base 30 is arranged behind the front base 20 in the vehicle, and the moving base 10 In order to be able to transform between an enlarged state in which the wheel base H between the rear wheels 31 is enlarged and a reduced state in which the wheel base H is smaller than the enlarged state, the front and rear bases 20 and 30 are moved relative to each other. The seat 40 includes a seating portion 41 having a seating surface 42, and the front base 20 is configured to be movable relative to the front body 22, which forms the skeleton of the front base 20. , has a reinforcing member 50 disposed along the vehicle width direction, and a front board 60 disposed so as to overlap the reinforcing member 50 from above the vehicle, and the front main body 22 includes a reinforcing member 50 and the front board 60 disposed from above the vehicle. With the board 60 supported, the seating surface 42 facing upwards of the vehicle, and the movable base 10 expanded, the front end of the front board 60 in the longitudinal direction of the vehicle and the reinforcing member 50 are aligned with the seating portion 41 of the vehicle. a lateral inclined portion 51 disposed further forward of the vehicle than the front end in the longitudinal direction, and the reinforcing member 50 is disposed in a lateral region of the front main body 22 in the vehicle width direction; and a lateral inclined portion of the reinforcing member 50. 51 and an arm portion 52 extending outward in the vehicle width direction, and the front board 60 has a side slope portion 61 disposed in a lateral region of the front body 22 in the vehicle width direction. , each of the lateral inclined parts 51 and 61 of the reinforcing member 50 and the front board 60 is inclined so as to rise upwardly of the vehicle as it goes outward in the vehicle width direction, and the lateral inclination of the reinforcing member 50 is portion 51 is disposed along the lateral inclined portion 61 of the front board 60, and the arm portion 52 of the reinforcing member 50 protrudes outward in the vehicle width direction from the front main body 22. The front wheel 21 is attached to the arm portion 52 of the reinforcing member 50.

In such an electric vehicle 1, the front board 60 can be used as a footrest when the movable base 10 is in an expanded state. Even when lateral acceleration is applied due to cornering or the like of the vehicle 1, the user seated on the seat 40 must keep his or her feet on the lateral inclined portion 61 of the front board 60 to counteract the lateral acceleration. can be set. That is, the lateral slope portion 61 of the front board 60 can efficiently prevent the user's foot from sliding sideways due to lateral acceleration. Therefore, the stability of the posture of the user riding the vehicle 1 can be improved.

In the electric vehicle 1 described above, the front board 60 can be efficiently reinforced by the side slope part 61 of the reinforcing member 50 arranged along the side slope part 61 of the front board 60. That is, the strength of the footrest can be efficiently improved. In the electric vehicle 1 described above, the front wheel 21 is attached to the arm portion 52 of the reinforcing member 50 that protrudes from the front main body 22 in the vehicle width direction. Therefore, even if the height of the front board 60 is lowered to make it easier for the user to get on and off the vehicle, there is no need to reduce the diameter of the front wheel 21 to match the height of the front board 60. For example, the diameter of the front wheels 21 can be set so that the vehicle 1 can overcome a step when moving forward. Therefore, it is possible to prevent the running performance of the electric vehicle 1 from deteriorating.

In the electric vehicle 1 described above, in particular, when the movable base 10 is expanded, a space for placing luggage can be secured between the seating portion 41 of the seat 40 and the rear base 30, and a space for placing luggage between the seat 40 and the luggage can be secured. space to install a footrest at the front of the vehicle. Therefore, the installation space for the footrest and the space for placing luggage can be efficiently secured.

In the electric vehicle 1 according to the present embodiment, the front board 60 is separated from the reinforcing member 50 such that the length of the front board 60 in the vehicle longitudinal direction is longer than the length of the reinforcing member 50 in the vehicle longitudinal direction. Extends to the rear of the vehicle. In such an electric vehicle 1, the user can place his or her feet on the front board 60 over a wide range in the longitudinal direction of the vehicle. Therefore, the stability of the posture of the user riding the vehicle 1 can be improved.

In the electric vehicle 1 according to this embodiment, the front board 60 is made of resin. In such an electric vehicle 1, it becomes difficult for the user's feet to slip on the front board 60. Therefore, the stability of the posture of the user riding the vehicle 1 can be improved.

In the electric vehicle 1 according to the present embodiment, the rear base 30 is located above the vehicle with respect to the front board 60 when the movable base 10 is in a contracted state, and is configured to accommodate the front board 60. It has a rear board 70 configured. Typically, in a reduced mobility state, the user does not board the vehicle, so the footrest becomes a hindrance in reducing the size of the vehicle so that it can turn around quickly. On the other hand, in the electric vehicle 1 described above, the front board 60 is housed so as to be located below the vehicle with respect to the rear board 70, and it is possible to secure a space for placing luggage on the rear board 60. can. Therefore, the installation space for the footrest and the space for placing luggage can be efficiently secured.

In the electric vehicle 1 according to the present embodiment, the rear board 70 includes a bottom portion 71 disposed in the central region of the rear base 30 in the horizontal direction of the vehicle, and a bottom portion 71 located in the central region of the rear base 30 in the horizontal direction of the vehicle. It has a peripheral sloped part 72 disposed in a peripheral area located around the central area, and the peripheral sloped part 72 rises upwardly of the vehicle as it moves away from the central area of the rear base 30 in the vehicle horizontal direction. It has an inclined peripheral edge part 72. In such an electric vehicle 1, even if the luggage placed on the rear board 70 moves in the horizontal direction of the vehicle, the peripheral edge of the rear board 70 prevents the luggage from falling off the rear board 70. This can be prevented by the inclined portion 72. Therefore, it is possible to efficiently secure a loading space for the luggage so that the luggage can be stably placed.

In the electric vehicle 1 according to the present embodiment, the front board 60 is arranged at the bottom part 62 disposed in the central region of the front body 22 in the vehicle width direction and at the front edge region of the front body 22 in the vehicle longitudinal direction. The front inclined part 63 is inclined so as to rise upwardly of the vehicle toward the front of the vehicle. In such an electric vehicle 1, even if an inertial force toward the front of the vehicle is applied due to sudden braking or the like, the user sitting on the seat 40 can place his or her feet on the front board 60 to counteract the inertial force. The driver can step on the front inclined portion 63 of the vehicle. Therefore, the stability of the posture of the user riding the vehicle 1 can be improved.

Although the embodiments of the present invention have been described so far, the present invention is not limited to the above-described embodiments, and the present invention can be modified and changed based on the technical idea thereof.

1... Electric vehicle, vehicle 10... Moving base 20... Front side base, 21... Front wheel, 22... Front side main body 30... Rear side base, 31... Rear wheel 40... Seat, 41... Seating part, 42... Seating surface 50... Reinforcement member , 51... Side slope part, 52... Arm part 60... Front side board, 61... Side slope part, 62... Bottom part, 63... Front slope part 70... Back side board, 71... Bottom part, 72... Peripheral slope part H... Wheelbase

Claims (7)

A moving base configured to be movable by electric drive,
a seat placed on the movable base;
The movable base includes a front base having a front wheel and a rear base having a rear wheel,
The rear base is located at the rear of the vehicle with respect to the front base,
The movable base is configured to be deformable between an enlarged state in which the wheel base between the front wheels and the rear wheels is enlarged and a reduced state in which the wheel base is smaller than the enlarged state. configured to allow the bases to be movable relative to each other;
An electric vehicle, wherein the seat includes a seating portion having a seating surface,
The front base has a front main body forming a frame of the front base, a reinforcing member arranged along the vehicle width direction, and a front board arranged so as to overlap the reinforcing member from above the vehicle,
the front main body supports the reinforcing member and the front board;
The front main body has a rear opening formed at a rear end in the longitudinal direction of the vehicle so as to open toward the rear of the vehicle;
The rear base has a rear main body forming a skeleton of the rear base, and the rear main body opens the rear opening of the front main body from the rear of the vehicle by relative movement of the front side and the rear base. is capable of sliding in the longitudinal direction of the vehicle with respect to the front main body while overlapping the front main body in the longitudinal direction of the vehicle through the section;
When the seating surface faces upward of the vehicle and the movable base is expanded, the front end of the front board in the longitudinal direction of the vehicle and the reinforcing member are arranged further forward of the vehicle than the front end of the seating portion in the longitudinal direction of the vehicle. ,
The reinforcing member has a lateral inclined portion disposed in a lateral region of the front main body in the vehicle width direction, and an arm portion extending outward in the vehicle width direction from the lateral inclined portion of the reinforcing member,
The front board has a lateral slope portion disposed in a lateral region of the front main body in the vehicle width direction,
Each of the reinforcing member and the lateral inclined portion of the front board is inclined so as to rise upwardly of the vehicle as it goes outward in the vehicle width direction;
a lateral inclined part of the reinforcing member is arranged along a lateral inclined part of the front board;
The arm portion of the reinforcing member projects outward in the vehicle width direction from the front main body,
An electric vehicle, wherein the front wheel is attached to an arm of the reinforcing member. A moving base configured to be movable by electric drive,
a sheet placed on the movable base;
Equipped with
The movable base includes a front base having a front wheel and a rear base having a rear wheel,
The rear base is located at the rear of the vehicle with respect to the front base,
The movable base is configured to be deformable between an enlarged state in which the wheel base between the front wheels and the rear wheels is enlarged and a reduced state in which the wheel base is smaller than the enlarged state. configured to allow the bases to be movable relative to each other;
An electric vehicle, wherein the seat includes a seating portion having a seating surface,
The front base has a front main body forming a frame of the front base, a reinforcing member arranged along the vehicle width direction, and a front board arranged so as to overlap the reinforcing member from above the vehicle,
The front main body supports the reinforcing member and the front board,
The rear base has a rear board configured to be located above the vehicle with respect to the front board and accommodate the front board when the movable base is in a contracted state;
When the seating surface faces upward of the vehicle and the movable base is expanded, the front end of the front board in the longitudinal direction of the vehicle and the reinforcing member are arranged further forward of the vehicle than the front end of the seating portion in the longitudinal direction of the vehicle. ,
The reinforcing member has a lateral inclined part disposed in a lateral region of the front main body in the vehicle width direction, and an arm part extending outward in the vehicle width direction from the lateral inclined part of the reinforcing member,
The front board has a lateral slope portion disposed in a lateral region of the front main body in the vehicle width direction,
Each of the reinforcing member and the lateral inclined portion of the front board is inclined so as to rise upwardly of the vehicle as it goes outward in the vehicle width direction;
a lateral inclined part of the reinforcing member is arranged along a lateral inclined part of the front board;
The arm portion of the reinforcing member projects outward in the vehicle width direction from the front main body,
An electric vehicle, wherein the front wheel is attached to an arm of the reinforcing member. 3. The front board extends rearward from the reinforcing member to the rear of the vehicle such that the length of the front board in the longitudinal direction of the vehicle is longer than the length of the reinforcing member in the longitudinal direction of the vehicle. electric vehicle. The electric vehicle according to any one of claims 1 to 3 , wherein the front board is made of resin. 2. The rear base according to claim 1 , wherein the rear base has a rear board configured to be positioned above the vehicle with respect to the front board and accommodate the front board when the moving base is in a contracted state. electric vehicle. The rear board includes a bottom portion disposed in a central region of the rear base in the vehicle horizontal direction, and a peripheral slope portion disposed in a peripheral region located around the central region of the rear base in the vehicle horizontal direction. The electric vehicle according to claim 2 or 5 , wherein the peripheral edge slope is sloped so as to rise upwardly of the vehicle as it moves away from a central area of the rear base in the vehicle horizontal direction. The front board has a bottom portion disposed in a central region of the front body in the vehicle width direction, and a front inclined portion disposed in a leading edge region of the front body in the vehicle longitudinal direction;
The electric vehicle according to any one of claims 1 to 6 , wherein the front inclined portion is inclined upwardly toward the front of the vehicle.