JPH10201795A - Frame structure of electrically motorized vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut down the number of parts and bending processes by supporting the floor from the lower part and extending side frames which are installed in a pair right-and-left in the width direction of a vehicle body, towards rearward and upward and by installing a seat post on the fixed seat stay of the extended upper part. SOLUTION: A floor to rest legs is installed between a front wheel 2 and a rear wheel 8 and a seat post 14 to support a seat is installed in a seat stay 18 of the vehicle body frame. A main frame 22 positioning in the vehicle center of the vehicle frame with an upturn part 22a thereof extending downward from a head pipe 20 and the horizontal part 22b thereof bending rearward, has an L-letter shape at a side glance view. The side frames 24r and 24l are welded and fixed at the front end of the horizontal part 22b of the main frame 22, from where they extend in the vehicle-width and left-and-right direction and bending toward rearward, forming a fan form. The floor is supported from downward by a pair of right-and-left side frames 24r and 24 extending rearward and main frame 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a frame structure for an electric vehicle.

[0002]

2. Description of the Related Art In general, in an electric vehicle such as an electric tricycle as shown in FIG. 7, an occupant sits on a seat a at a rear portion of a vehicle body and puts his feet on a floor b at a central portion thereof. By gripping the steering wheel c to steer the front wheel d and controlling the driving of the rear wheel f by operating the accelerator lever e,
A desired operation can be performed (for example, see
-340285).

[0003] Also, although not shown, a support frame rises from a frame extending below the floor b from front to back,
The seat post is fixed to this support frame and the seat a
Is installed. In this case, the lower part of the sheet a
Electrical components g such as a battery and a control box are provided, and the support frame is installed so as to avoid these electrical components g.

[0004]

However, in the above-mentioned conventional electric vehicle, the supporting frame is fixed to the left and right body frames, so that the supporting frame becomes large. In addition, since the supporting frame is provided separately from the body frame, the number of parts and the number of bending steps are large. And the structure tended to be complicated. Further, the weight of the strength member should be reduced as much as possible, but conventionally, the weight cannot be sufficiently reduced.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and it is possible to reduce the number of parts and the number of bending steps and to reduce the weight of the frame of an electric vehicle. The purpose is to provide.

[0006]

The present invention has the following arrangement to solve the above-mentioned problems. According to a first aspect of the present invention, there is provided an electric vehicle in which a floor on which a foot rests is provided in front of a seat on which an occupant sits, and a seat post of the seat is mounted on a seat stay of a vehicle body frame. A frame structure for an electric vehicle, characterized in that side frames provided in pairs on the left and right sides extend rearward and upward, and the seat stay is fixed to an upper portion of the extension, and a seat post is attached to the seat stay. .

According to a second aspect of the present invention, an electric component case having high rigidity is fixed in the vicinity of the seat stay mounting portion of the pair of side frames. Structure.

According to a third aspect of the present invention, a seat post in which a seat stay is protruded and fixed to a lower portion of a seat in a bar shape is inserted and fixed in a state where the seat post is inclined rearward, and a plurality of substantially parallel plate members are provided in a left and right pair. The frame structure for an electric vehicle according to claim 1 or 2, wherein an upper portion of the side frame is connected, and a bracket for attaching a support unit for a rear wheel is provided at a lower portion.

According to a fourth aspect of the present invention, there is provided a frame member plate for connecting the main frame to the left and right side frames. The frame member plate places the battery pack containing the battery on the upper surface and positions the battery pack. The frame structure for an electric vehicle according to any one of claims 1 to 3, wherein a hole is formed.

According to the first aspect of the present invention, the side frames, which support the floor from below and are provided in pairs on the left and right in the vehicle width direction, extend rearward and upward, and the seat stay is fixed to the upper portion of the extension. Since the seat post is attached to the seat stay, there is no need to separately attach the sheath stay attachment structure, and the number of parts and the number of bending steps can be reduced.

According to the second aspect of the present invention, since the electrical component case having high rigidity is fixed near the seat stay mounting portion of the pair of side frames, the electrical component case made of aluminum casting or the like becomes a strength member. The frame is improved in both strength and rigidity.

According to the third aspect of the present invention, since the seat stay is configured to insert and fix the seat post, which is protruded and fixed in a bar shape at the lower portion of the seat, in a state of being inclined backward, the seat is raised at the same time as the seat is raised. Located behind,
On the other hand, the seat is positioned forward while the seat is positioned downward. Therefore, it is possible to simultaneously adjust the seat up and down and back and forth according to the height of the occupant. Also,
Since the seat stay is formed by connecting a plurality of substantially parallel plate members to the upper portions of the left and right side frames, the rigidity of the frame can be improved by the combination of the seat stays. In addition, since the brackets for attaching the rear wheel support unit are provided at the lower portion of the seat stay, the weight of the occupant on the seat is supported by the rear wheel unit as it is, and the sharing of weight is efficient.

According to a fourth aspect of the present invention, there is provided a frame member plate for connecting the main frame to the left and right side frames. The frame member plate places the battery pack containing the battery on the upper surface and positions the battery pack. Since the holes are formed, the frame member plate connects the left and right side frames and the main frame to improve the rigidity, and the rigidity can be improved without increasing the weight while keeping the weight low. Further, since the battery pack can be positioned by the positioning holes of the frame member plate, no additional positioning member is required, and the number of components can be reduced. Further, the weight can be reduced.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 6 are structural explanatory diagrams of a three-wheel electric vehicle which is an embodiment of the electric vehicle according to the present invention.

As shown in the figure, in the electric vehicle, one front wheel 2 is rotatably supported by a front fork 4 and
The front fork 4 is pivotally supported by the head pipe 20 so as to be pivotable, and can be steered by the bar handle 6. Two rear wheels 8, 8 are rotatably provided at the rear of the electric vehicle. Between the front wheel 2 and the rear wheels 8, there is provided a floor 12 on which a foot is placed in front of a seat 10 on which an occupant sits, and a seat post 1 supporting the seat 10.
4 is attached to the seat stay 18 of the vehicle body frame 16.

As shown in detail in FIG. 2, the vehicle body frame 16 extends downward from the head pipe 20 at the front of the vehicle body (rise portion 22a) and bends rearward (horizontal portion 22b). A main frame 22 which is shaped like a letter and is located at the center of the vehicle body;
2b A pair of left and right side frames 24 (right: 24r, left: 2) that are welded and fixed to the front end, extend from the left and right in the vehicle width direction, bend rearward, and extend rearward with a shoulder shape.
4l), and the main frame 22 and the side frames 24 support the floor 12 from below.

That is, the left and right side frames 2
4 and 24, as shown in detail in FIGS. 3 and 4, the front portions 24a and 24a extend right and left, and the central portions 24b and 2
From 4b, the rear portions 24c, 24c are bent so as to be squeezed inward. The right and left side frames extend rearward and upward from the rising portions 24d, 24d behind the rear side portions 24c, 24c in parallel. Further, two upper and lower seat stays 18 each having a shape of "H" are fixed to the upper portion of the extended rising portions 24d, 24d, and a receiving pipe penetrating through the central portion of the two seat stays 18 is provided. 18a pipe-shaped seat post 1
4 is tightened and fixed.

A frame member plate 26 made of a plate material is welded and fixed to the rear part of the horizontal part 22b of the main frame 22 and the rear part 24c of the side frame 24 so as to straddle them and cover them from above. The frame member plate 26 has an edge portion bent downward to increase the strength. Therefore, the main frame 22 and the side frames 24, which are the main members of the vehicle body, move the head pipe 20 forward and the frame member plate 26
Is integrated by welding with the back side, and the strength is improved. At the same time, the frame member plate 26 also has a function of guarding the battery case 30 and the lower part of the electrical component case 34 from water and stepping stones. Also,
The rear end portion 22c of the main frame 22 is fixed by welding to (the lower surface portion of) the frame member plate 26 via a reinforcement 28 made of a plate material and having an “L” shape in a side view.

As described above, the left and right side frames 2
4 and 24, the front is fixed to the main frame 22, and the rear supports the seat post 14 via the seat stay 18. In the central portions 24b, 24b between the front portions and the rear portions of the side frames 24, 24, after spreading in the vehicle body width direction to support the floor 12, the throttle direction to support the battery 30, which is a heavy object of the vehicle, and the occupant. Has turned to.

The frame member plate 26 has folded portions at the front and side portions to increase the strength.
The upper surface of the frame member plate 26 is substantially flat for mounting the battery pack 30 containing the battery in the cover, and an appropriate number of holes 32 are formed at appropriate positions for positioning the battery pack 30. Have been. At the rising portions 24d, 24d of the pair of side frames 24, 24, a plate material plate 33 whose inside extends in the front-rear direction and vertically in the vehicle body is fixed by welding. In the lower portion near the mounting portion of the seat stay 18, a highly rigid electrical component case (containing a main controller or the like) 34 made of a thick plate or cast (for example, made of aluminum casting) is provided via side plate plates 33, 33. It is fixed to the frame rising portions 24d, 24d by bolting. The plate members 33, 33 extend rearward and are fixed by welding to a shelf 33a having a horizontal plane, and a spare battery pack 30 is attached to the shelf 33a.
Can be installed.

Here, the seat post 14 is inclined,
A seat stay 18 into which the seat post 14 is inserted and fastened and fixed has a plurality of substantially parallel plate members connecting the upper portions of the pair of left and right side frames 24, 24, and a lower portion of the seat stay 18 at the rear. Support unit 3 for wheel 8
A bracket 40 for rotatably mounting the bracket 8 is provided.

The driving of the left and right rear wheels 8, 8 is performed by using the driving force of the motor 42 as shown in FIGS.
4, the gears are decelerated, and the driving force is distributed to the left and right by differential gears. Brackets 46r, 46l are provided on the right and left below the rear portions 24c, 24c of the side frames 24, 24, and the front end of the gear case 44 is pivotally mounted on the right bracket 46r so as to be swingable. Has become. A rear wheel support shaft 48 extends left and right from the rear end of the gear case 44, and the rear end of a swing arm 50 is welded and fixed to the left support shaft 48. The front end of the swing arm 50 is connected to the left bracket. 46l. Therefore, the gear case 44 and the arm member 50 are connected to the brackets 46r and 4r.
The upper part of the gear case 44 is supported by the seat stay 18 by the support unit 38.

The support unit 38 can be a cushion unit composed of a spring and a damper, or a rigid rod appropriately selected and used.
If a cushion unit is used, the gear case 4
4 and the arm member 50 become a swing arm having the brackets 46r and 46l as fulcrums, and the rear wheels 8 and 8 swing up and down, so that the cushion unit can cushion the wheels. When a rigid rod is used, the gear case 44, the arm member 50, the side frame rising portion 24d and the rod have a substantially triangular shape in a side view, and the seat 10 has high rigidity.
Can support the weight of the occupants above.

As described above, in the embodiment, the side frames 24, 24, which support the floor 12 from below and are provided in pairs on the left and right in the vehicle width direction, are extended rearward and upward, and the rising portions which are extended portions are provided. Since the seat stays 18 are fixed to the upper portions 24d and 24d, and the seat posts 14 are attached to the seat stays 18, it is not necessary to separately attach the mounting structure of the sheath stays 18 to reduce the number of parts and the bending process. Reduction can be achieved.

Further, since the electrical component case 34 having high rigidity is fixed in the vicinity of the seat stay 18 mounting portion of the pair of side frames 24, 24, the electrical component case becomes a strength member, and the frame has strength and rigidity. Improve together.

Further, since the seat post 18 is provided with the seat post 14 fixed to the lower part of the seat 10 in a bar shape and inserted and fixed in a state of being inclined backward, the position of the seat 10 is raised and at the same time, the seat 10 is moved backward. Located in
On the other hand, when the seat 10 is
0 is forward. Therefore, the seat can be adjusted up, down, front and back simultaneously according to the physique of the occupant.

Further, since the seat stay 18 has a plurality of substantially parallel plate members connecting the upper portions of the left and right side frames 24, 24, the rigidity of the frame can be improved by the combination of the seat stays 18. it can. Further, since the bracket 40 for mounting the support unit 38 for the rear wheels 8 is provided below the seat stay 18, the weight of the occupant on the seat 10 is supported by the rear wheel support unit 38 as it is. Is efficient.

Further, the battery pack has a frame member plate 26 for connecting the main frame 22 to the left and right side frames 24, 24. The frame member plate 26 places a battery pack 30 containing a battery on an upper surface thereof, and Since the 30 positioning holes 32 are formed, the frame member plate 26 connects the left and right side frames 24, 24 and the main frame 22 to improve the rigidity, and the rigidity can be improved while being lightweight. In addition, since the battery pack 30 can be positioned by the positioning holes of the frame member plate 26, no additional positioning member is required, and the number of components can be reduced. Further, the weight can be reduced.

[0029]

As described above, according to the first aspect of the present invention, it is not necessary to separately attach the sheath stay mounting structure, and the number of parts and the number of bending steps can be reduced.

According to the second aspect of the invention, the electrical component case, which is usually made of aluminum casting and has high rigidity, serves as a strength member, and the strength and rigidity of the frame are improved.

According to the third aspect of the present invention, the seat is positioned rearward at the same time as the position of the seat is raised, while the seat is positioned forward at the same time as the seat is positioned lower. Therefore, the seat can be adjusted up, down, front and back simultaneously according to the occupant's carefulness. In addition, since the seat stays connect the left and right side frames, the rigidity of the frames can be improved accordingly. In addition, the weight of the occupant on the seat is supported by the rear wheel unit as it is, and the sharing of the weight is efficient.

According to the fourth aspect of the present invention, since the battery pack containing the battery is placed on the upper surface and the positioning hole of the battery pack is formed, the frame member plate connects the left and right side frames and the main frame. The rigidity can be improved, and the rigidity can be improved while keeping the weight low. Further, since the battery pack can be positioned by the positioning holes of the frame member plate, no additional positioning member is required, and the number of components can be reduced. Further, the weight can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall side view of an electric vehicle according to an embodiment of the present invention.

FIG. 2 is an explanatory perspective view of a frame of the electric vehicle shown in FIG. 1;

FIG. 3 is an explanatory view showing a configuration of a frame of the electric vehicle shown in FIG. 1 in a plan view.

FIG. 4 is a detailed structural diagram around a rising portion of a side frame of the electric vehicle in FIG. 1;

FIG. 5 is an explanatory perspective view of a rear wheel suspension device of the electric vehicle shown in FIG. 1;

FIG. 6 is a side view configuration explanatory diagram of the rear wheel suspension device of the electric vehicle in FIG. 1;

FIG. 7 is an explanatory diagram of a configuration of a conventional electric vehicle.

[Explanation of symbols]

 Reference Signs List 10 seat 12 floor 14 seat post 16 body frame 18 seat stay 22 main frame 24 side frame 26 frame member plate 28 lean hosement 30 battery pack 32 positioning hole 34 electrical component case

Claims (4)

[Claims] 1. An electric vehicle having a floor on which a foot is placed in front of a seat on which an occupant sits, wherein a seat post of the seat is mounted on a seat stay of a vehicle body frame. A frame structure for an electric vehicle, wherein a pair of side frames is extended rearward and upward, and the seat stay is fixed to an upper portion of an extended portion, and a seat post is attached to the seat stay. 2. The frame structure for an electric vehicle according to claim 1, wherein a highly rigid electrical component case is fixed near the seat stay mounting portions of the pair of side frames. 3. A seat post, in which a seat stay is protruded and fixed in a bar shape at a lower portion of a seat, is inserted and fixed in a state where the seat post is inclined rearward, and a plurality of substantially parallel plate members connect upper left and right side frame members. What you are doing,
The frame structure for an electric vehicle according to claim 1, wherein a bracket for attaching a support unit for a rear wheel is provided at a lower portion. 4. A frame member plate for connecting a main frame to left and right side frames, wherein the frame member plate places a battery pack containing a battery on an upper surface and drills a positioning hole of the battery pack. 4. The method according to claim 1, wherein
The frame structure of the electric vehicle according to any one of the above.