JP2013136310A - Vehicle body structure of straddle-type electric vehicle - Google Patents

Abstract

A vehicle body structure for a straddle-type electric vehicle capable of improving the weight balance between front and rear wheels and reducing vehicle vibration during traveling is provided.
A head pipe portion 12, a frame portion 13 extending rearward from the head pipe portion 12, and a pivot plate 17 disposed below the head pipe portion 12 in the frame portion 13 are provided. The front wheel WF is disposed in front of and below the head pipe portion 12 while the handle 19 is rotatably supported by the head pipe portion 12, and the rear wheel is provided via an arm portion 18 that is swingably supported by the pivot plate 17. In a straddle-type electric vehicle equipped with a body frame F on which WR is supported, a motor 26 is disposed on a straight line connecting the head pipe portion 12 and the ground point X of the rear wheel WR in a side view, and in a side view. A battery 27 is disposed at a position overlapping the motor 26.
[Selection] Figure 1

Description

  The present invention relates to a vehicle body structure of a saddle riding type electric vehicle.

  Patent Document 1 discloses a structure in which a motor is supported on a body frame in a saddle riding type electric vehicle and a battery is disposed above or below the motor.

Japanese Patent No. 2945094

In the above-described conventional structure, the motor and the battery, which are heavy objects, are distributed (separated in the vertical and front-rear directions), so that depending on the position of the motor and the battery in the front-rear direction, the weight applied to the front and rear wheels is biased. In addition, vehicle vibration (shimmy, weave) during traveling is likely to occur.
Shimmy is a phenomenon in which the front wheels sway slightly around the steering shaft, and is likely to occur when the front wheel load is high. It is easy to occur when is high.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle body structure of a straddle-type electric vehicle that can improve the weight balance of front and rear wheels and suppress the occurrence of vehicle vibration during traveling. To do.

  As a means for solving the above-mentioned problems, the invention according to claim 1 includes a head pipe portion (12), a frame portion (13) extending backward from the head pipe portion (12), and the frame portion (13). And a pivot portion (17) disposed below and below the head pipe portion (12), and the head pipe portion (12) while rotatably supporting a handle (19) on the head pipe portion (12). 12) A vehicle body frame (F) in which a front wheel (WF) is disposed below and in front of the vehicle, and a rear wheel (WR) is supported via an arm portion (18) swingably supported by the pivot portion (17). The motor (26) is arranged on a straight line connecting the head pipe portion (12) and the grounding point (X) of the rear wheel (WR) in a side view in the vehicle body structure of the saddle-ride type electric vehicle provided with The motor (26) and That located in the battery (27, 28) is arranged to provide a body structure of a saddle-ride type electric vehicle, characterized in that.

  According to a second aspect of the present invention, in the vehicle body structure of the saddle riding type electric vehicle according to the first aspect, the battery (27, 28) is arranged as a separate unit on a side of the motor (26). It is characterized by.

  According to a third aspect of the present invention, in the vehicle body structure of the saddle riding type electric vehicle according to the second aspect, the motor (26) has an output shaft (29) for transmitting power to the rear wheel (WR). It protrudes and the said battery (27) is arrange | positioned at the side of the output shaft (29) of the said motor (26), It is characterized by the above-mentioned.

  According to a fourth aspect of the present invention, in the vehicle body structure of the straddle-type electric vehicle according to the third aspect, the drive rotates integrally with the output shaft (29) or rotates in mesh with the output shaft (29). A member (32), and a power transmission member (33) for transmitting a rotational force from the drive member (32) to the rear wheel (WR), and the batteries (27, 28) 32) and a side of the power transmission member (33).

  According to a fifth aspect of the present invention, in the vehicle body structure of the straddle-type electric vehicle according to any one of the first to fourth aspects, the battery (27, 28) is the pivot portion (17) in a side view. A rear extension (27R, 28R) positioned on the straight line at the rear lower side, and a rear storage portion (36) above the rear extension (27R, 28R) and below the seat (21) in a side view. ) Is arranged.

  According to a sixth aspect of the present invention, in the vehicle body structure of the saddle riding type electric vehicle according to any one of the first to fifth aspects, the battery (27, 28) and the motor (26) in a side view. An upper storage portion (20) is arranged above and between the head pipe portion (12) and the seat (21).

  The invention according to claim 7 is the vehicle body structure of the saddle riding type electric vehicle according to any one of claims 1 to 6, wherein the battery (27, 28) is the front wheel (WF) in a side view. The upper projections (27U, 28U) are located on the straight line at a position higher than the upper end of the front, and are located below the upper projections (27U, 28U) and behind the front wheels (WF) in a side view. A storage part (35) is arranged.

According to the first aspect of the present invention, the motor and the battery, which are heavy objects, are stacked between the front wheel and the rear wheel in the front-rear direction and the vertical direction of the vehicle body, and the motor and the battery are the head. By concentrating on the straight line connecting the pipe part and the ground contact point of the rear wheel or in the vicinity of the straight line, the weight balance of the front and rear wheels can be improved, and the occurrence of vehicle body vibration during traveling can be suppressed.
As a result of diligent research, the inventors of the present invention are less likely to generate shimmy by concentrating heavy objects on or near the straight line connecting the head pipe portion and the grounding point of the rear wheel. It has been found that it is difficult to generate a heavy object in front of the vehicle, and the present invention has been achieved.

  According to the second aspect of the present invention, it is possible to improve the battery cooling and removal operations. In addition, by forming the gap between the motor and the battery so as to extend in the front-rear direction, running air can be introduced into the motor and cooling of the motor can be promoted.

  According to the invention described in claim 3, the output shaft of the motor can be protected by the battery.

  According to the fourth aspect of the present invention, it is possible to protect the driving member such as the sprocket and the power transmission member such as the chain while increasing the battery capacity.

  According to the invention described in claim 5, a part of the heavy battery is arranged on a straight line connecting the head pipe part and the grounding point of the rear wheel, and the lightweight storage part is deviated from the straight line. By disposing above the straight line, it is possible to suppress the occurrence of vehicle body vibration as much as possible and provide a storage portion while ensuring the capacity of the battery, thereby ensuring convenience.

  According to the sixth aspect of the present invention, the lightweight storage portion is disposed above the straight line deviating from the straight line connecting the head pipe portion and the grounding point of the rear wheel and in the vicinity of the head pipe portion. As a result, the occurrence of vehicle body vibration can be suppressed as much as possible to ensure the capacity of the storage portion, and convenience can be ensured.

  According to the seventh aspect of the present invention, a part of the heavy battery is disposed on a straight line connecting the head pipe portion and the grounding point of the rear wheel, and the lightweight storage portion is deviated from the straight line. By arranging it below this straight line, it is possible to suppress the occurrence of vehicle body vibration as much as possible, and to provide convenience by securing the storage capacity while securing the capacity of the battery.

1 is a side view of a straddle-type electric vehicle to which a structure according to an embodiment of the present invention is applied. It is the schematic which looked at the principal part of the said saddle riding type electric vehicle from the AA line of FIG. It is a figure explaining the modification of the said embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings used below, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow LH indicates the left side of the vehicle.

  FIG. 1 shows a straddle-type electric motorcycle 1 to which a structure according to an embodiment of the present invention is applied. A vehicle body frame F of the straddle-type electric motorcycle 1 rotates a front fork 11 that pivotally supports a front wheel WF. A head pipe portion 12 that is supported, a main frame portion 13 that extends rearward and downward from the head pipe portion 12 at a gentle angle, and then bends and extends rearward and downward at a steep angle, and a steep angle from the head pipe portion 12. After extending rearward and downward, it extends rearward substantially horizontally, and then extends rearward and upward and extends rearward from a bent portion of the mainframe portion 13 and a down frame portion 14 that is coupled to the rear end portion of the mainframe portion 13. A seat rail portion 15, and a support frame portion 16 that extends rearward and upward from a portion where the main frame portion 13 and the down frame portion 14 are coupled, and is coupled to the seat rail portion 15. To have.

  The head pipe portion 12 has a certain height dimension in the vertical direction. The main frame portion 13 is coupled to the upper side of the head pipe portion 12, and the down frame portion 14 is coupled to the lower side of the head pipe portion 12. ing. Further, the support frame portion 16, a portion extending rearward and downward at a steep angle of the main frame portion 13, and the front portion of the seat rail portion 15 form a triangular region in a side view.

  A pivot plate 17 is fixed to the front side of the portion where the main frame portion 13 and the down frame portion 14 are joined. An arm portion 18 is supported on the pivot plate 17 so as to be swingable in the vertical direction. A rear wheel WR is pivotally supported on the vehicle.

  A handle 19 is fixed to the upper portion of the front fork 11, and an upper storage portion 20 simulating the shape of a fuel tank of a motorcycle having an internal combustion engine is disposed above the main frame portion 13. The upper storage portion 20 is formed of a resin material or the like, has a storage space inside, and is used with an appropriate place open. A seat 21 on which the driver is seated is disposed behind the upper storage portion 20 and above the seat rail portion 15. A front cowl 22 that covers both sides and the front of the head pipe portion 12 is provided at the front of the vehicle.

  Brackets 23 and 24 for supporting the motor are respectively fixed to the rear portion of the main frame portion 13 and the rear portion of the down frame portion 14 that are positioned above and below the pivot plate 17. A bracket 23 fixed to the rear portion of the main frame portion 13 protrudes forward, and a bracket 24 fixed to the rear portion of the down frame portion 14 protrudes upward. In addition, a bracket 25 for supporting the motor is fixed to the lower portion of the portion of the down frame portion 14 that extends rearward and downward at a steep angle so as to protrude rearward.

  The driving motor 26 is supported by the main frame portion 13 and the down frame portion 14 with the three points on the outer peripheral portion being fixed by the brackets 23 to 25. The motor 26 is disposed inside the space surrounded by the main frame portion 13 and the down frame portion 14 and is located at the approximate center in the vehicle front-rear direction.

  FIG. 2 is a schematic view of the periphery of the motor 26 as viewed downward from the line AA in FIG. 1. Referring also to FIG. 2, the electric power supplied to the motor 26 is shown on the left and right sides of the motor 26. A left battery 27 for storing electricity and a right battery 28 are arranged. The left battery 27 and the right battery 28 are made of, for example, a lithium ion battery or the like housed in a casing, but may be made of a lead battery or the like.

  The motor 26, the left battery 27, and the right battery 28 are arranged so as to overlap in a side view, and in the present embodiment, the left battery 27 and the right battery 28 are attached to the vehicle body from the side and are detachable. It is configured. A gap in the vehicle width direction is formed between the left battery 27 and the right battery 28, and this gap extends in the vehicle front-rear direction.

  Here, as shown in FIG. 2, the motor 26 has an output shaft 29 projecting leftward, and a meshing portion 30 is formed on the outer peripheral portion on the tip end side of the output shaft 29. The meshing portion 30 meshes with an idle gear 31 that is rotatably supported by a support shaft adjacent to an output shaft 29 in the motor 26. The idle gear 31 is provided with a sprocket portion 32 that rotates integrally. A drive chain 33 as a power transmission member is wound around the sprocket portion 32. As shown in FIG. 1, the drive chain 33 extends rearward and is wound around the rear sprocket 34 of the rear wheel WR. . Thereby, the rotational force of the motor 26 is transmitted to the rear wheel WR.

  Referring to FIG. 1, the left battery 27 and the right battery 28 have the same shape in a side view, and are located on the side of a portion extending substantially horizontally from the lower edge of the upper storage portion 20 in the vertical direction. Extends to position. The left battery 27 and the right battery 28 extend from the lower side of the head pipe portion 12 to the vicinity of the pivot plate 17 in the front-rear direction. In the present embodiment, the entire motor 26 is moved from both sides by the left battery 27 and the right battery 28. It is in a covered state. Furthermore, as shown in FIG. 2, the output shaft 29 of the motor 26, the idle gear 31, the sprocket part 32, and the front part of the drive chain 33 are covered from the left by the left battery 27.

  Further, in the left battery 27 and the right battery 28, the part located behind the front wheel WF and in front of the motor 26 in a side view is recessed as a notch, and the recessed part includes A front storage portion 35 formed of a resin material or the like is provided so as to fill the portion. Further, in the region behind the left battery 27 and the right battery 28 in a side view, there are a support frame part 16, a part extending rearward and downward at a steep angle of the main frame part 13, and a front part of the seat rail part 15. A triangular area is exposed in the formed side view, and a rear storage portion 36 made of a resin material or the like is provided in this area.

  On the other hand, rear extensions 27R and 28R, which are part of the left battery 27 and the right battery 28, are located below the rear storage portion 36 in a side view and below the pivot plate 17, respectively. Batteries are accommodated in the extension portions 27R and 28R to increase the capacity. As shown in FIG. 2, an inner extension 37 extending inward in the vehicle width direction is formed on the lower side of the front portion of the left battery 27, and a battery is also accommodated in the inner extension 37. Furthermore, the inner extension 37 is located in front of the output shaft 29 and protects the output shaft 29 from the front.

  In FIG. 1, L1 indicates a straight line connecting the lower end of the head pipe portion 12 (specifically, the axial center of the lower end) and the ground contact point X of the rear wheel WR, and L2 indicates the upper end of the head pipe portion 12 ( Specifically, a straight line connecting the axis center of the upper end portion) and the ground contact point X of the rear wheel WR is shown. Here, in the present embodiment, the motor 26 is arranged so as to overlap with the straight line L1 at a portion near the center in the side view and overlap with the straight line L2 at a part on the upper side, and the motor 26 is on the straight line L1 or L2. Has been placed. Further, the left and right left batteries 27 and the right battery 28 of the motor 26 are also arranged on the straight line L1 or the straight line L2.

The arrangement relationship between the straight lines L1 and L2 and the components of the saddle riding type electric vehicle will be described in detail. The front storage part 35 and the rear storage part 36 are located at positions deviating from the straight lines L1 and L2. Further, the rear extension portions 27R and 28R are located on the straight line L1 and the straight line L2.
Further, upper protrusions 27U and 28U positioned on the straight line L1 are formed on the upper surfaces of the front portions of the left battery 27 and the right battery 28, and the upper protrusions 27U and 28U are positioned above the upper end of the front wheel WF. And the battery is accommodated in the inside. The front storage portion 35 described above is positioned below the upper projecting portions 27U and 28U and behind the front wheel WF.

  As described above, the saddle riding type electric motorcycle 1 includes the head pipe portion 12, the main frame portion 13 extending rearward from the head pipe portion 12, and the main frame portion 13 behind the head pipe portion 12. And a pivot plate 17 disposed at a lower position, and a front wheel WF is disposed at the front lower side of the head pipe portion 12 while the handle 19 is rotatably supported on the head pipe portion 12, and can swing on the pivot plate 17. A vehicle body frame F on which the rear wheel WR is supported via an arm portion 18 supported on the vehicle, and in a side view, on a straight line L1 or a straight line L2 connecting the head pipe portion 12 and the ground point X of the rear wheel WR. The motor 26 is disposed, and the left battery 27 and the right battery 28 are disposed at a position overlapping the motor 26 in a side view.

In such a structure, the heavy motor 26, the left battery 27, and the right battery 28 are disposed between the front wheel WF and the rear wheel WR, and are stacked in the front-rear direction and the vertical direction of the vehicle body. And the left battery 27 and the right battery 28 are integrated on the straight line L1 or the straight line L2, the weight balance of the front and rear wheels can be improved, and the occurrence of vehicle body vibration during traveling can be suppressed.
In other words, in terms of the point where the motor 26 is disposed on the straight line L1 or the straight line L2 connecting the head pipe portion 12 and the ground point X of the rear wheel WR, the motor 26 is linearly connected to the head pipe portion 12 and the straight line L1. It can be said that at least a part of the region R is surrounded by the region R (see FIG. 1) surrounded by L2.
Here, in the present embodiment, the configuration in which the motor 26, the left battery 27, and the right battery 28 are arranged on the straight line L1 and the straight line L2 in a side view has been described. However, in the present invention, the motor is not necessarily on the straight line L1. However, when the motor 26 is located only on the straight line L1, it is advantageous in terms of lowering the center of gravity. It can be said that it is advantageous in terms of operability when it is located only on the straight line L2.
As for the battery, it preferably overlaps with either of the straight lines L1 and L2. However, if the battery overlaps with the motor and is integrated with the motor in one of the straight lines L1 and L2, or in the vicinity thereof, the vibration suppressing effect can be expected. However, it does not necessarily overlap with either of the straight lines L1 and L2.

  In this straddle-type electric motorcycle 1, the left battery 27 and the right battery 28 are arranged as separate units on the side of the motor 26. In such a structure, the cooling of the left battery 27 and the right battery 28 is performed. The removal work can be improved. Referring to FIG. 2, specifically, the cooling of the battery is performed by introducing the traveling wind Y into the motor 26 by forming a gap between the motor 26 and the left battery 27 and the right battery 28 so as to extend forward and backward. The cooling of the motor 26 can be promoted.

  In the saddle riding type electric motorcycle 1, the motor 26 is provided with an output shaft 29 that projects power to the rear wheel WR, and the left battery 27 is disposed on the side of the output shaft 29 of the motor 26. However, in this structure, the output shaft 29 of the motor 26 can be protected by the left battery 27. Further, the saddle riding type electric motorcycle 1 is provided with a sprocket portion 32 that meshes with the output shaft 29 and rotates, and a drive chain 33 that transmits a rotational force from the sprocket portion 32 to the rear wheel WR. In this case, the left battery 27 is enlarged to increase the battery capacity while protecting the members such as the sprocket part 32 and the drive chain 33. Is also possible.

Further, in the saddle riding type electric motorcycle 1, the left battery 27 and the right battery 28 have rear extension portions 27R and 28R positioned on the straight lines L1 and L2 in the rear lower part of the pivot plate 17 in a side view, The rear storage portion 36 is disposed above the rear extension portions 27R and 28R and below the seat 21 as viewed. However, in this structure, a part of the left battery 27 and the right battery 28, which are heavy objects, are connected to the straight lines L1 and L1. By arranging the lightweight rear storage portion 36 above the straight lines L1 and L2 above the straight lines L1 and L2, the occurrence of vehicle body vibration is suppressed as much as possible, and the battery capacity is reduced. Convenience can be ensured by providing a storage part while ensuring.
In the present embodiment, the rear extensions 27R and 28R are positioned on the straight line L1 and the straight line L2. However, the rear extensions 27R and 28R may overlap one of these straight lines.

  Further, in the saddle riding type electric motorcycle 1, the upper storage portion 20 is disposed between the head pipe portion 12 and the seat 21 above the left battery 27, the right battery 28, and the motor 26 in a side view. However, in this structure, the lightweight upper storage portion 20 is disposed above the straight line L1 and the straight line L2 deviating from the straight line L1 and the straight line L2, and in the vicinity of the head pipe portion 12, thereby reducing the vibration of the vehicle body. Generation can be suppressed as much as possible, and the capacity of the storage portion can be ensured, and convenience can be ensured.

Further, in the saddle riding type electric motorcycle 1, the left battery 27 and the right battery 28 have upper projecting portions 27U and 28U positioned on the straight line L1 at a position higher than the upper end of the front wheel WF in a side view. The front storage portion 35 is disposed below the upper projecting portions 27U and 28U and behind the front wheel WF as viewed.
In this structure, a part of the left battery 27 and the right battery 28, which are heavy objects, are disposed on the straight line L1, and the lightweight front storage portion 35 is disposed below the straight line L1 that is off the straight line L1. In addition, it is possible to suppress the occurrence of vehicle body vibration as much as possible and provide a storage portion while securing the capacity of the battery to ensure convenience.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit thereof.
For example, a modification of the above embodiment will be described with reference to FIG. In this modification, the number of motors is different from that of the above embodiment, and three motors 26 'are provided. In this example, one of the three motors overlaps the straight line L1. Thus, even when a plurality of motors are provided, if at least one of them overlaps with the straight line L1 or the straight line L2, the weight balance of the front and rear wheels is improved, and the effect of suppressing vehicle body vibration during traveling can be obtained. .

  In the above embodiment, the motor 26, the left battery 27, and the right battery 28 are configured as separate units. However, the motor 26 and the battery may be configured as one unit. In the above embodiment, the saddle riding type electric motorcycle 1 has been described as the saddle riding type electric vehicle. However, the present invention can also be applied to a saddle riding type electric tricycle.

  Furthermore, in the above-described embodiment, the configuration in which the rotational force is transmitted to the rear wheel WR using the drive chain 33 has been described, but a shaft drive configuration may be employed as the drive member and the power transmission member. Moreover, although the said embodiment demonstrated the structure provided with a left-right paired battery, a battery may be single.

1 Saddle-type electric motorcycle (saddle-type electric vehicle)
12 Head pipe part 13 Main frame part (frame part)
17 Pivot plate (pivot part)
18 Arm portion 21 Seat 26 Motor 27 Left battery (battery)
27R Rear extension 27U Upper protrusion 28 Right battery (battery)
28R Rear extension 28U Upper protrusion 29 Output shaft 32 Sprocket (drive member)
33 Drive chain (power transmission member)
F Body frame WF Front wheel WR Rear wheel X Grounding point

Claims (7)

A head pipe portion (12), a frame portion (13) extending rearward from the head pipe portion (12), and a rear lower portion of the frame portion (13) with respect to the head pipe portion (12). A pivot portion (17), and a front wheel (WF) disposed in front of and under the head pipe portion (12) while rotatably supporting a handle (19) on the head pipe portion (12). In a vehicle body structure of a saddle-ride type electric vehicle including a vehicle body frame (F) that supports a rear wheel (WR) via an arm portion (18) that is swingably supported by the portion (17).
A motor (26) is arranged on a straight line connecting the head pipe portion (12) and the ground point (X) of the rear wheel (WR) in a side view, and overlaps with the motor (26) in a side view. A vehicle body structure of a straddle-type electric vehicle, characterized in that a battery (27, 28) is disposed at a position.   The vehicle body structure of the saddle riding type electric vehicle according to claim 1, wherein the battery (27, 28) is arranged as a separate unit on a side of the motor (26). The motor (26) is provided with a projecting output shaft (29) for transmitting power to the rear wheel (WR),
The vehicle body structure of a saddle-ride type electric vehicle according to claim 2, wherein the battery (27) is disposed on a side of an output shaft (29) of the motor (26). A drive member (32) that rotates integrally with the output shaft (29) or rotates in mesh with the output shaft (29);
A power transmission member (33) for transmitting a rotational force from the drive member (32) to the rear wheel (WR),
The vehicle body structure of the saddle riding type electric vehicle according to claim 3, wherein the batteries (27, 28) are arranged on the sides of the drive member (32) and the power transmission member (33). The battery (27, 28) has a rear extension (27R, 28R) located on the straight line in the rear lower part of the pivot portion (17) in a side view,
The rear storage part (36) is arranged above the rear extension part (27R, 28R) and below the seat (21) in a side view. The body structure of a saddle-ride type electric vehicle.   In a side view, an upper storage portion (20) is disposed above the batteries (27, 28) and the motor (26) and between the head pipe portion (12) and the seat (21). The body structure of the saddle riding type electric vehicle according to any one of claims 1 to 5. The battery (27, 28) has an upper protrusion (27U, 28U) located on the straight line at a position higher than the upper end of the front wheel (WF) in a side view,
The front storage part (35) is arrange | positioned under the said upper protrusion part (27U, 28U) and the back of the said front wheel (WF) by side view, The any one of Claims 1-6 characterized by the above-mentioned. The vehicle body structure of the saddle riding type electric vehicle described.

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