JP6747230B2 - Electric car - Google Patents

Description

The present invention relates to an electric vehicle.

Conventionally, as an electric vehicle, for example, the one described in Patent Document 1 is known. This electric vehicle has a driving wheel and a driven wheel that are arranged at intervals in the traveling direction, and has a luggage holder and is arranged between the driving wheel and the driven wheel to rotatably support the driving wheel and the driven wheel. A deck (frame), a stay connected to the deck and extending upward from the deck, a seat (seat) supported by the stay, and a handle are provided. The electric vehicle is configured to be switchable between a sitting state in which the user sits on the seat and holds the handle and a loading platform state in which the user descends from the seat to the ground and holds the handle.

For example, the seat is rotatably connected to the stay, and in the sitting state, the seat is deployed so as to extend in the reverse traveling direction, and in the luggage carrier state, the seat is stored so as to extend downward.

JP, 2016-159778, A

By the way, in Patent Document 1, there is no mention about the structure for restricting the relative rotation of the stay and the seat, but there is no doubt that it is required to secure sufficient fixing strength while being compact.

An object of the present invention is to provide an electric vehicle that is compact and that can secure the fixing strength of the seat appropriately.

An electric vehicle that solves the above problem has a deck and a stay connected to the deck, supports a drive wheel, a driven wheel, and a steering wheel, and a rotation unit pivotally supported by a support portion provided on the stay. A seat having a moving shaft, a first member and a second member which are respectively fixed to the supporting portion and the rotating shaft and are rotatable relative to each other coaxially with the rotating shaft, and guide grooves formed in the first member. The movement in the radial direction around the rotation axis is guided by the pole, and the pole having the external teeth that can be engaged with and disengaged from the internal teeth provided on the second member coaxially with the rotation axis A cam that is engaged and is rotatably provided in the central portion of the first member coaxially with the rotation shaft, and urges the cam so as to rotate in one direction, and the outer tooth and the inner tooth. An urging member for moving the pawl in a radial direction in which is engaged with the cam, and an operating force for rotating the cam in the opposite direction against the urging force of the urging member. An electric vehicle including: a lock release lever that moves the pawl in a radial direction to release the meshing state of the outer teeth and the inner teeth when input, and the seat includes the rotation shaft. The mounting portion has a mounting portion that projects radially from a central portion in the axial direction, the supporting portion is fastened to the seat base panel attached to the stay, and the seat base panel, and the supporting portion in the axial direction of the rotating shaft. A pair of shaft mounts that pivotally support the rotating shaft on both sides of the mounting portion, and the seat base panel has a fixing screw tightened in a screw hole formed in at least one of the shaft mounts. A mounting hole is formed along the axial direction of the rotary shaft so as to be inserted with play .

According to this configuration, in the seat, the relative rotation of the first member and the second member, that is, the relative rotation of the support portion and the rotation shaft is restricted by the engagement of the outer teeth and the inner teeth. Is non-rotatably fixed to the stay. On the other hand, in the seat, the relative rotation of the first member and the second member, that is, the relative rotation of the support portion and the rotation shaft is allowed by releasing the meshing state of the outer teeth and the inner teeth. It is rotatable with respect to the stay. Thereby, the rotational position of the seat with respect to the stay can be adjusted. In this case, the first member, the second member, and the like are collectively arranged around the rotation shaft, so that a more compact structure can be obtained. Further, the seat is fixed to the stay by the engagement of the outer teeth and the inner teeth of the pole that moves in the radial direction around the rotation axis, whereby the seat fixing strength can be suitably secured. ..

According to this structure, the distance between the shaft mounts in the axial direction of the rotary shafts can be adjusted by adjusting the position of the fixing screw within the play range of the mounting hole. By adjusting the distance between the shaft mounts in the axial direction of the rotary shafts, the sliding resistance between the shaft mounts and the mounting portion sandwiched in the axial direction can be adjusted. This makes it possible to adjust the falling speed of the sheet when releasing the meshing state of the outer teeth and the inner teeth with the operation of the lock release lever.
In the electric vehicle, it is preferable that the lock release lever extends in a radial direction of the seat around the rotation shaft and extends upward of the seat.
According to this configuration, the operation force can be input to the lock release lever from above the seat, so that, for example, the user's hand operating the lock release lever can move the external teeth and the inner teeth. It is possible to reduce the possibility of interfering with the above-mentioned sheet that falls when the meshing state of the teeth is released.

INDUSTRIAL APPLICABILITY The present invention has the effect of being able to suitably secure the fixing strength of the seat while being compact.

The perspective view which looked at the structure about one embodiment of an electric car from diagonally back and up. The perspective view which looked at the structure about the electric vehicle of the same embodiment from diagonally right upper. The side view which shows the structure and the attitude|position of a user in the seat riding mode about the electric vehicle of the same embodiment. The side view which shows the structure and the user's attitude|position in cart mode about the electric vehicle of the embodiment. The side view which shows the structure in the folding state about the electric vehicle of the embodiment. The perspective view which shows the structure around the seat about the electric vehicle of the same embodiment. FIG. 7 is a sectional view taken along line 7-7 of FIG. 6. The perspective view which shows the structure around the seat about the electric vehicle of the same embodiment. FIG. 9 is a sectional view taken along line 9-9 of FIG. 8. The exploded perspective view which shows the structure of the 2nd lock mechanism about the electric vehicle of the same embodiment. The exploded perspective view which shows the structure of the 2nd lock mechanism about the electric vehicle of the same embodiment.

Hereinafter, one embodiment of the electric vehicle will be described.
As shown in FIGS. 1 and 2, the electric vehicle 10 includes drive wheels 11 and driven wheels 12 that are arranged at intervals in the traveling direction. The drive wheels 11 are provided as a pair at intervals in the vehicle width direction. The electric vehicle 10 also includes a main body 15 having a deck 16 and a stay 17. The deck 16 constitutes a footrest portion or a luggage placement portion of a user who gets in the vehicle, and is connected to a lower end portion of the stay 17 at a tip end portion thereof so as to be rotatable about an axis O1 extending in the vehicle width direction. .. The lower end portion of the stay 17 is widened to both sides in the vehicle width direction to form a pair of holder portions 17a.

Both drive wheels 11 are rotatably supported by a lower end portion of the stay 17 on both outer sides of the stay 17 (both holder portions 17a) in the vehicle width direction about an axis O2 extending in the vehicle width direction. The driven wheel 12 is rotatably supported below the deck 16 via a bearing member 18 provided at a tip portion of the deck 16 which is separated from the stay 17. The deck 16 can swivel in the traveling direction by rotating the bearing member 18 around an axis extending in the vertical direction.

On the upper end of the stay 17, a loop-shaped handle 20 that extends upward and on both sides in the vehicle width direction is supported rotatably around an axis extending in the vertical direction. That is, the handle 20 has a connecting portion 21 into which the upper end of the stay 17 is fitted in a rotatable state, and a pair of grip portions 22 and 23 connected to both ends of the connecting portion 21 in the vehicle width direction. Both grip portions 22 and 23 are substantially V-shaped and open in the vehicle width direction so as to face each other. The tips of the two handle parts 22 and 23 are connected to each other via a substantially I-shaped carrying handle part 24 extending in the vehicle width direction.

A substantially saddle-shaped seat 40 is rotatably connected to an intermediate portion in the vertical direction of the stay 17 around an axis O3 extending in the vehicle width direction.
A substantially disk-shaped mechanical first lock mechanism 31 is arranged adjacent to the deck 16 coaxially with the axis O1 on the holder portion 17a on one side (left side in FIG. 1). The first lock mechanism 31 restricts the relative rotation of the deck 16 and the stay 17 around the axis O1 in the locked state, and allows the relative rotation of the deck 16 and the stay 17 around the axis O1 in the unlocked state. To do. The first lock mechanism 31 is basically configured to hold the locked state regardless of the inclination angles of the deck 16 and the stay 17.

The first lock mechanism 31 is provided with a lock release actuator 32 mainly composed of an electric motor, for example. The lock release actuator 32 switches the first lock mechanism 31 to the unlocked state when the drive signal is output, and switches the first lock mechanism 31 to the locked state when the output of the drive signal is stopped. Tolerate.

In addition, a pair of electric motors 33 that rotationally drive both drive wheels 11 around the axis O2 are housed in both holder portions 17a. Furthermore, a pair of electric or electromagnetic braking mechanisms 34 that decelerate or stop the rotation of the electric motors 33 are housed in the holder portions 17a. Therefore, the electric vehicle 10 can go straight along the traveling direction by the both electric motors 33 being driven to rotate together with the both drive wheels 11 at the same rotational speed. For example, in the electric vehicle 10, the both electric motors 33 are normally rotated at the same rotation speed, so that the drive wheels 11 travel straight ahead in a traveling direction preceding the driven wheels 12 (hereinafter, also referred to as “forward traveling direction”). To do. On the contrary, in the electric vehicle 10, the two electric motors 33 reversely rotate at the same rotational speed, so that the drive wheels 11 follow the driven wheels 12 in the traveling direction (hereinafter, also referred to as “reverse traveling direction”). Go straight. Further, the electric vehicle 10 is capable of turning in the traveling direction because the electric motors 33 and the drive wheels 11 are rotationally driven at different rotational speeds. Further, the electric vehicle 10 can be decelerated or stopped by driving both braking mechanisms 34.

A substantially disk-shaped mechanical second locking mechanism 41 is arranged adjacent to the seat 40 and is substantially coaxial with the axis O3 at an intermediate portion in the vertical direction of the stay 17. The second lock mechanism 41 restricts the relative rotation of the stay 17 and the seat 40 around the axis O3 in the locked state, and allows the relative rotation of the stay 17 and the seat 40 around the axis O3 in the unlocked state. To do. The second lock mechanism 41 is basically configured to maintain the locked state regardless of the inclination angles of the seat 40 and the stay 17.

Further, a lock release lever 49 is rotatably connected to an intermediate portion in the vertical direction of the stay 17 around the axis O3. The lock release lever 49 is formed in a substantially gate shape that sandwiches the seat 40 including the second lock mechanism 41 in the vehicle width direction, and is normally held at an initial position extending substantially along the stay 17. The lock release lever 49 is linked to the second lock mechanism 41, and when the lock release lever 49 is rotated from the initial position so as to be separated from the stay 17, the second lock mechanism 41 is switched to the unlocked state and the rotation operation is performed. The second lock mechanism 41 is allowed to switch to the locked state by rotating and returning to the initial position upon release.

Here, the electric vehicle 10 can switch to various modes by changing at least one of the angles of the deck 16 and the seat 40 with respect to the stay 17 so that the electric vehicle 10 has a posture suitable for its application.

That is, as shown in FIG. 3, in the seat riding mode (sitting on state) of the electric vehicle 10, the stay 17 is inclined so as to be directed in the reverse traveling direction as it goes upward, and the seat 40 is directed in the reverse traveling direction. Is extended. The rotational position of the seat 40 at this time is referred to as a deployed position (or fully open position). In the seat riding mode, the user U is seated on the seat 40 facing the forward running direction, grips the handle 20, and takes a posture in which the soles of both feet sandwiching the stay 17 in the vehicle width direction are placed on the deck 16. This allows the user U to move electrically while sitting on the electric vehicle 10. It goes without saying that the stay 17 is located on the side preceding the deck 16 in the traveling direction (forward traveling direction) in the seat riding mode.

Further, as shown in FIG. 4, in the cart mode (loading state) of the electric vehicle 10, the stay 17 inclines so as to move in the reverse traveling direction as it goes upward in accordance with the seat riding mode, and the seat 40 stays in the same direction. It extends downward substantially along the line 17. The rotational position of the seat 40 at this time is referred to as a storage position (or a fully closed position). In this cart mode, the user U takes a posture of standing at the position on the forward traveling direction side of the electric vehicle 10 in the reverse traveling direction and gripping the steering wheel 20. This allows the user U to move manually with the luggage B placed on the deck 16. It goes without saying that the traveling direction in the cart mode (reverse traveling direction) is set to be opposite to the traveling direction in the seat riding mode (forward traveling direction). Further, in the cart mode, the electric motor 33 may be energized to drive both drive wheels 11. As a result, the burden on the user U can be reduced when carrying heavy luggage or the like.

Further, as shown in FIG. 5, in the carry mode of the electric vehicle 10, the electric vehicle 10 is folded so that the deck 16 and the stay 17 overlap each other, and the seat 40 extends substantially along the stay 17 in accordance with the cart mode. ing. As a result, the user U can carry the electric vehicle 10 while gripping the grip portion 24 during transportation and rolling the drive wheels 11.

In addition, for example, an arm-shaped stand 19 is connected to a tip end portion of the deck 16 on the drive wheel 11 side so as to be rotatable about an axis extending in the vehicle width direction. The stand 19 cooperates with both drive wheels 11 to support the electric vehicle 10 in the carry mode in an upright posture when the stand 19 is opened with respect to the deck 16 and the tip thereof is in a pivotal position where it can contact the ground. It goes without saying that in the use state (seat riding mode or cart mode), the stand 19 is closed so that the tip end does not contact the ground.

As shown in FIG. 1, the upper end portion of the handle portion 22 of the handle 20 is inserted into a cylindrical accelerator lever 26 which is substantially concentric with the handle portion 22. The accelerator lever 26 is rotatable about an axis substantially along the center line of the accelerator lever 26 and is held at a predetermined initial rotation position. The accelerator lever 26 is equipped with an electronic sensor having an acceleration sensing function, and is rotated from the initial rotation position by the user U, so that the moving speed (speed adjustment) can be adjusted according to the rotation angle. It is configured to output an operation signal to an electronic control device (not shown). On the other hand, a push-down brake button 27 is installed on the upper end of the handle 23 of the handle 20. The brake button 27 is equipped with an electronic switch having a braking sensing function, and is configured to output an operation signal for deceleration or stop to the electronic control device when pressed by the user U. ing.

The electronic control device is electrically connected to both electric motors 33, and individually controls the drive of the electric motors 33 in response to an operation signal from the accelerator lever 26 or the like. That is, the traveling (straightening or the like) of the electric vehicle 10 is controlled by the drive control of the electric motors 33 by the electronic control unit. The electronic control unit is electrically connected to the lock release actuator 32, and drives and controls the lock release actuator 32 by the output of the drive signal described above.

Next, the second lock mechanism 41 and its peripheral structure will be described. Since the second lock mechanism 41 has a structure arranged around the axis O3, the terms relating to the circle (center, radial direction, etc.) will be described assuming that the axis O3 is the center.

As shown in FIGS. 6 and 7, the stay 17 includes a substantially elongated lid wall 17b facing the forward running direction side and a pair of side walls standing upright from the both edges in the vehicle width direction of the lid wall 17b in the reverse running direction side. 17c is formed into a substantially U-shaped cross section. A seat base panel 50 is fastened to the lid wall 17b as shown in FIGS. 8 and 9. The seat base panel 50 includes a substantially rectangular plate-shaped mounting wall 50a facing the forward traveling direction side along the lid wall 17b, and one edge (right side in FIG. 9) of the mounting wall 50a in the vehicle width direction to the reverse traveling direction side. It has a supporting wall 50b that stands upright and is formed in a substantially L-shaped cross section.

The mounting wall 50a is fastened with a shaft-shaped shaft mount 51 having a substantially semi-cylindrical shape on the side separated from the support wall 50b in the vehicle width direction. That is, a pair of upper and lower mounting holes 50c penetrating in the plate thickness direction is formed in the vertical middle portion of the mounting wall 50a. Each mounting hole 50c has a substantially oval shape extending in the vehicle width direction (along the direction of the axis O3). On the other hand, the shaft mount 51 is formed with screw holes 51b facing the respective mounting holes 50c. The root diameter of each screw hole 51b is set to be slightly smaller than the inner diameter of the mounting hole 50c in the lateral direction. The shaft mount 51 is fastened to the mounting wall 50a by fastening the fixing screw 52 inserted in each mounting hole 50c to the screw hole 51b. At this time, the shaft mount 51 can adjust the position in the vehicle width direction with respect to the mounting wall 50a within the range of the mounting hole 50c.

The support wall 50b is fastened with a substantially kamaboko-shaped shaft mount 53 on the side facing the shaft mount 51 in the vehicle width direction. As shown in FIG. 7, both shaft mounts 51 and 53 are provided with circular bearing holes 51a and 53a, which are concentric with each other and have the same inner diameter and open in the vehicle width direction.

A gear mount 54 is fastened to the support wall 50b on the side separated from the shaft mount 51 in the vehicle width direction with a gap in that direction. The gear mount 54 constitutes the support unit SU together with the seat base panel 50 and both shaft mounts 51 and 53.

The seat 40 is rotatably connected to the stay 17 at both shaft mounts 51 and 53. That is, the sliding bush 55 is attached to each of the bearing holes 51a and 53a of the both shaft mounts 51 and 53. Each of the sliding bushes 55 has a cylindrical portion 55a having an outer diameter equivalent to the inner diameters of the bearing holes 51a, 53a, and outward flanges 55b provided at the ends of the cylindrical portion 55a facing each other in the vehicle width direction. Have. Then, in each sliding bush 55, the cylindrical portion 55a is inserted into the bearing holes 51a and 53a in a state where the flange 55b is in contact with the corresponding shaft mounts 51 and 53.

On the other hand, the base end portion (the tip end portion on the stay 17 side) of the seat 40 has an attachment portion 40a set to a width dimension equivalent to the distance between the sliding bushes 55 in the vehicle width direction, and the sliding bushes 55a. It has a substantially cylindrical rotation shaft 40b that is concentric with 55 and penetrates the mounting portion 40a in the vehicle width direction in a non-rotatable manner. That is, the mounting portion 40a projects in the radial direction from the central portion in the axial direction of the rotating shaft 40b. The outer diameter of the rotating shaft 40b is set to be equal to the inner diameter of the sliding bush 55. The axial length of the rotating shaft 40b is set to be slightly longer than the width dimension of the seat base panel 50 in the vehicle width direction, and both ends of the rotating shaft 40b project from the shaft mounts 51 and 53, respectively. There is. The rotary shaft 40b is axially supported by the shaft mounts 51 and 53 via both sliding bushes 55 at both ends protruding from the mounting portion 40a in the vehicle width direction. Therefore, the seat 40 is rotatable about the stay 17 in such a manner that the cylindrical portion 55a and the flange 55b of each sliding bush 55 are brought into sliding contact with the outer peripheral surface of the rotating shaft 40b and the tip end surface of the mounting portion 40a in the vehicle width direction. It is connected.

The hole penetrating the rotating shaft 40b in the axial direction is reduced in diameter at the tip end on the shaft mount 51 side to form a screw hole 40c. A support screw 40d whose head is located outside the stay 17 (side wall 17c) in the vehicle width direction is fastened to the screw hole 40c.

The second lock mechanism 41 described above is provided between the gear mount 54 and the rotating shaft 40b in the vehicle width direction. The second lock mechanism 41 includes a substantially disc-shaped first disc 42 as a first member and a substantially disc-shaped second disc 43 as a second member. The first disc 42 is fixed to the gear mount 54 by welding, and the second disc 43 is fixed to the rotating shaft 40b by welding.

As shown in FIGS. 10 and 11, the first disc 42 is formed with a substantially circular recess 42a that opens toward the second disc 43, and a substantially circular through hole 42b is formed in the center thereof. Further, a locking hole 42c is formed continuously with the through hole 42b and is recessed radially outward thereof. A plurality of (three) convex portions 42d are provided on the first disc 42 from the bottom wall of the concave portion 42a toward the second disc 43 side at a predetermined angle, and the convex portions 42d adjacent to each other are formed. A substantially U-shaped guide groove 42e is formed therebetween so as to extend in the radial direction.

The second disk 43 has an outer diameter equivalent to the inner diameter of the recess 42a. The second disc 43 is formed with a substantially circular first recess 43a that is recessed on the side away from the first disc 42, and has an inner diameter smaller than the inner diameter of the first recess 43a. A second recess 43b having a substantially circular shape is formed. Further, inner teeth 43c are formed on the entire inner circumference of the first recess 43a. The second disk 43 is rotatably supported by the first disk 42 around the axis O3 by being mounted so that its outer peripheral surface is in sliding contact with the inner peripheral surface of the recess 42a. At this time, the inner teeth 43c face the guide groove 42e in the radial direction. The second disk 43 has a substantially circular shaft insertion hole 43d formed in the center thereof.

A ring-shaped holder 44 made of a metal plate is mounted on the outer peripheral portion of the second disk 43 mounted on the first disk 42, and the first disk 42 and the second disk 43 are mounted on the holder 44. Thus, the shaft is prevented from coming off in the axial direction in a state where the relative rotation around the axis O3 is allowed.

When the second disk 43 is mounted on the first disk 42, the cam 45 is rotatably housed around the axis O3 in the internal space formed by the recess 42a and the first and second recesses 43a and 43b. Has been done. A plurality of (three) cam portions 45a are formed on the outer peripheral portion of the cam 45 at predetermined angles, and a plurality of (three) pin-shaped projections 45b are formed parallel to the axial direction on the second disk 43 side. Are provided so as to project toward each other at a predetermined angle. In addition, the cam 45 is formed with a substantially flat circular (oval) fitting hole 45c that penetrates the center of the cam 45 in the axial direction.

In each guide groove 42e of the first disk 42, a substantially rectangular plate-shaped pole 46 having a width slightly smaller than the circumferential width thereof is arranged so as to be slidable in the radial direction. Each of the pawls 46 is formed with an external tooth 46a that meshes with the internal tooth 43c of the second disk 43 at the tip end portion thereof, and a cam hole 46b penetrating in the thickness direction at the base end portion thereof. The cam hole 46b is inclined with respect to the circumferential direction. In addition, a step in the axial direction is set in the radial middle portion of each pawl 46, and a pawl cam surface 46c that faces the cam portion 45a in the radial direction is formed. The pole cam surface 46c extends so as to cross the side surface of the pole 46 and to have an inclination angle with respect to the pitch circle of the outer teeth 46a. Each of the pawls 46 engages with the cam 45 while the corresponding projection 45b is inserted into the cam hole 46b and the corresponding cam portion 45a is in contact with the pawl cam surface 46c.

Here, when the cam 45 rotates in one direction (counterclockwise rotation direction in FIG. 10) with the cam 45 and each pole 46 housed between the first disk 42 and the second disk 43 (internal space). The pawl 46 is moved radially along the guide groove 42e when the pawl cam surface 46c is pressed by the cam portion 45a. At this time, the outer teeth 46a of the pole 46 mesh with the inner teeth 43c of the second disk 43, and the second disk 43 cannot rotate with respect to the first disk 42 (lock state). The relative rotation of the gear mount 54 and the rotation shaft 40b, that is, the relative rotation of the stay 17 and the seat 40 is also restricted.

On the other hand, when the cam 45 rotates in the opposite direction (counterclockwise in FIG. 11), the pawl 46 is retracted in the radial direction along the guide groove 42e by the cam hole 46b being pressed by the protrusion 45b of the cam 45. Move to. At this time, the meshing between the outer teeth 46a of the pole 46 and the inner teeth 43c of the second disc 43 is released, so that the second disc 43 becomes rotatable with respect to the first disc 42 (unlocked state). .. Further, the relative rotation of the gear mount 54 and the rotation shaft 40b, that is, the relative rotation of the stay 17 and the seat 40 is also allowed.

A spiral return spring 47 as a biasing member is housed in the central portion of the first disk 42, that is, on the inner peripheral side of the through hole 42b. This return spring 47 has one end located on the outer peripheral side hooked in the locking hole 42c of the first disk 42 and the other end located on the inner peripheral side hooked on an appropriate portion of the cam 45, thereby It is biased so that 45 rotates in one direction, that is, the relative rotation of the stay 17 and the seat 40 is restricted.

As shown in FIG. 7, in the fitting hole 45c of the cam 45, a stepped columnar operation shaft 48, which is axially immovably supported by the gear mount 54 and is loosely inserted in the return spring 47, integrally rotates. It is inserted to do.

Both ends of the lock release lever 49 described above are connected to the support screw 40d and the operation shaft 48, respectively. That is, the lock release lever 49 has a pair of arms 49a and 49b that extend upward in the radial direction at the above-described initial position and are spaced apart in the vehicle width direction. The head portion of the support screw 40d is rotatably inserted outside the side wall 17c in the one arm portion 49a in the vehicle width direction, and the other arm portion 49b is arranged in the vehicle width direction by the gear mount 54. Also, the operation shaft 48 is fitted and inserted so as to rotate integrally with the outside.

Therefore, when the lock release lever 49 is rotated from the initial position to move away from the stay 17, the cam 45 rotates together with the operation shaft 48. Needless to say, the rotation direction of the cam 45 at this time corresponds to the above-described reverse direction (counterclockwise rotation direction in FIG. 11), that is, the rotation direction in which the lock is released. When the operating force of the lock release lever 49 is released, the cam 45 biased by the return spring 47 rotates together with the operation shaft 48, and the lock release lever 49 returns to the initial position. It goes without saying that the turning direction of the cam 45 at this time coincides with the one direction described above (counterclockwise turning direction in FIG. 10), that is, the turning direction in which the cam 45 is locked.

Next, the operation of the present embodiment and its effect will be described.
(1) In the present embodiment, in the seat 40, the relative rotation of the first disc 42 and the second disc 43, that is, the relative rotation of the support unit SU and the rotating shaft 40b is restricted by the engagement of the outer teeth 46a and the inner teeth 43c. As a result, the stay 17 is non-rotatably fixed to the stay 17. On the other hand, in the seat 40, the relative rotation of the first disc 42 and the second disc 43, that is, the relative rotation of the support unit SU and the rotation shaft 40b is permitted by releasing the meshing state of the outer teeth 46a and the inner teeth 43c. It is rotatable with respect to the stay 17. As a result, the rotational position of the seat 40 with respect to the stay 17 can be adjusted. In this case, the first disc 42, the second disc 43, etc. (the second lock mechanism 41) are collectively arranged around the rotation shaft 40b, so that a more compact structure can be obtained. Further, the seat 40 is fixed to the stay 17 by the engagement of the outer teeth 46a and the inner teeth 43c of the pole 46 that moves in the radial direction around the rotation shaft 40b, so that the fixing strength of the seat 40 can be suitably secured. ..

(2) In the present embodiment, since the lock release lever 49 extends in the radial direction toward the upper side of the seat 40 about the rotation shaft 40b, the input of the operating force to the lock release lever 49 is the seat 40. It is possible from above. For this reason, for example, the hand of the user U who operates the lock release lever 49 may interfere with the sheet 40 that falls due to the release of the meshing state of the outer teeth 46a and the inner teeth 43c (release of the second lock mechanism 41). Can be reduced.

(3) In the present embodiment, the fixing screw 52 that is tightened in the screw hole 51b formed in the shaft mount 51 is inserted into the seat base panel 50 along the axial direction of the rotating shaft 40b with play. A mounting hole 50c is formed. Therefore, the distance between the shaft mounts 51 and 53 in the axial direction of the rotating shaft 40b can be adjusted by adjusting the position of the fixing screw 52 within the play range of the mounting hole 50c. By adjusting the distance between the shaft mounts 51 and 53 in the axial direction of the rotary shaft 40b, the sliding resistance between the shaft mounts 51 and 53 and the mounting portion 40a sandwiched in the axial direction can be adjusted. Thereby, the falling speed of the seat 40 at the time of releasing the meshed state of the outer teeth 46a and the inner teeth 43c (release of the second lock mechanism 41) accompanying the operation of the lock release lever 49 can be adjusted.

(4) In the present embodiment, the seat 40 can be firmly fixed to the stay 17 by the plurality of poles 46.
(5) In the present embodiment, the plurality of pawls 46 are arranged at equal angular intervals around the rotating shaft 40b, so that the plurality of pawls 46 relatively rotate the support unit SU and the rotating shaft 40b. Can be regulated evenly.

(6) In the present embodiment, it is possible to release the meshing state of the outer teeth 46a and the inner teeth 43c (release of the second lock mechanism 41) by operating only one lock release lever 49, so that the user U Can be easily operated even while supporting the seat 40 with one hand.

(7) In the present embodiment, when the operation of the lock release lever 49 is stopped for some reason, the second lock mechanism 41 switches to the locked state, so that the fall of the seat 40 during the adjustment of the rotational position can be prevented. ..

(8) In the present embodiment, the relative rotation of the stay 17 and the seat 40 when the seat 40 is switched between the deployed position and the storage position is left to the manual operation by the user U, so that, for example, the switching speed thereof. Can be independently decided by the user U. Therefore, the seat 40 can be switched between the deployed position and the stored position at a speed suitable for the sense of the user U, and convenience can be improved.

The above embodiment may be modified as follows.
In the above-described embodiment, as in the cart mode, the stay 17 is tilted in the reverse traveling direction as it goes upward, and the seat 40 is extended downward substantially along the stay 17, so that the electric vehicle 10 is driven. You may switch to standing mode. In this standing-on mode, the user U takes the posture of holding the handle 20 in the forward running direction, placing one foot on the ground, and the other foot on the deck 16. This allows the user U to move manually while kicking the ground with one foot. In the standing-by mode, an appropriate lock mechanism capable of manually or electrically fixing rotation around the axis of the bearing member 18 extending in the vertical direction so that the axis of the driven wheel 12 is fixed in the vehicle width direction may be provided. preferable.

-In the said embodiment, the drive wheel 11 may be rotatably supported by the deck 16.
-In the said embodiment, the driven wheels 12 may be provided in a pair at intervals in the vehicle width direction.

-In the said embodiment, the handle 20 may be fixed to the stay 17 non-rotatably.
In the above embodiment, the first lock that restricts the relative rotation of the deck 16 and the stay 17 only when the angle between the deck 16 and the stay 17 matches the angle corresponding to the fully open state and the fully closed state. It may be the mechanism 31.

In the above embodiment, the second lock mechanism that restricts the relative rotation of the seat 40 and the stay 17 only when the rotation position of the seat 40 with respect to the stay 17 matches the rotation position corresponding to the deployed position and the storage position. It may be 41. Alternatively, the second lock mechanism 41 for restricting the relative rotation of the seat 40 and the stay 17 when the rotational position of the seat 40 with respect to the stay 17 falls within a predetermined range (for example, a range preferable for the seating of the user U). Good. In other words, such setting makes it impossible to restrict the relative rotation of the seat 40 and the stay 17 by the second lock mechanism 41, for example, between the second disc 43 and the pole 46, a pole retracted in the radial direction. It can be realized by interposing an appropriate stopper for restricting the movement of 46.

-In the said embodiment, the shaft mount 53 may be fastened to the seat base panel 50 similarly to the shaft mount 51. That is, the adjustment of the distance between the shaft mounts 51 and 53 in the axial direction of the rotating shaft 40b may be performed by adjusting the fastening position of the shaft mount 53 with respect to the seat base panel 50.

-In the said embodiment, the attachment hole 50c may be substantially circular. That is, the fixing screw 52 tightened in the screw hole 51b may not be inserted into the mounting hole 50c in the vehicle width direction (along the axial direction of the rotating shaft 40b) with play. In this case, the number of shaft mounts that support the rotating shaft 40b may be one. Further, the seat base panel 50 may be omitted and the shaft mount may be directly fastened to the stay 17.

-In the said embodiment, the lock release lever 49 may be extended in the radial direction centering|focusing on the rotating shaft 40b toward other than above the seat 40 (for example, below the seat 40).
-In the said embodiment, the structure of the 2nd locking mechanism 41 is an example. For example, the number of poles 46 is arbitrary. Further, when the number of the poles 46 is plural, the shapes may be different from each other as long as the operations of the plural poles 46 are interlocked.

-In the said embodiment, the moving direction of the pole 46 may be inclined with respect to the radial direction as long as there is a moving component in the radial direction.
Next, the technical ideas that can be understood from the above-described embodiments and other examples will be added below.

(A) In the above electric vehicle,
An electric vehicle having a plurality of the poles.
With this configuration, the seat can be firmly fixed to the stay by the plurality of poles.

(B) In the above electric vehicle,
An electric vehicle in which the plurality of poles are arranged at equal angular intervals around the rotation axis.
According to this structure, the relative rotations of the support portion and the rotating shaft can be uniformly regulated by the plurality of poles.

SU... Supporting part, 10... Electric vehicle, 11... Drive wheel, 12... Driven wheel, 15... Main body part, 16... Deck, 17... Stay, 20... Handle, 40... Seat, 40a... Attachment part, 40b... Rotation Shaft, 41... Second locking mechanism, 42... First disc (first member), 43... Second disc (second member), 51b... Screw hole, 42e... Guide groove, 43c... Inner teeth, 45... Cam, 46... Pole, 46a... External teeth, 47... Return spring (biasing member), 49... Lock release lever, 50... Seat base panel, 50c... Mounting hole, 51, 53... Shaft mount, 52... Fixing screw.

Claims (2)

A main body having a deck and a stay connected to the deck, and supporting a drive wheel, a driven wheel and a handle;
A seat having a rotation shaft pivotally supported by a support portion provided on the stay;
A first member and a second member that are fixed to the support portion and the rotation shaft, respectively, and that are relatively rotatable coaxially with the rotation shaft;
The guide groove formed in the first member guides the movement in the radial direction around the rotation shaft, and can be engaged with and disengaged from the internal teeth provided on the second member coaxially with the rotation shaft. A pole with external teeth,
A cam that is engaged with the pawl and is rotatably provided in the central portion of the first member coaxially with the rotating shaft;
An urging member that urges the cam to rotate in one direction and moves the pawl in a radial direction in which the outer teeth and the inner teeth mesh with each other;
A meshing state of the outer teeth and the inner teeth by being connected to the cam so as to integrally rotate and inputting an operation force for rotating the cam in the opposite direction against the urging force of the urging member. A lock release lever for moving the pole in a radial direction to release the electric pole ,
The seat has a mounting portion that projects radially from a central portion in the axial direction of the rotating shaft,
The support portion is
A seat base panel attached to the stay,
A pair of shaft mounts that are fastened to the seat base panel and axially support the rotating shaft on both sides of the mounting portion in the axial direction of the rotating shaft;
The seat base panel is formed with a mounting hole through which a fixing screw that is tightened in a screw hole formed in at least one of the both shaft mounts is inserted with play in the axial direction of the rotating shaft. , Electric car. The electric vehicle according to claim 1,
An electric vehicle in which the lock release lever extends in a radial direction toward the upper side of the seat about the rotation shaft.

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