JP2017105440A - bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bicycle equipped with a pedal and a saddle, which is improved in flexibility of design with respect to arrangement of a swing arm or a rear suspension and a battery.SOLUTION: A battery box is mounted on a vehicle body frame. A rear wheel is arranged at a rear side of the vehicle body frame. A swing arm is arranged to be swingable in a vertical direction of a vehicle relative to the vehicle body frame. The swing arm supports the rear wheel. A rear suspension connects the vehicle body frame to the swing arm. The swing arm and the rear suspension are provided to be swingable around a swing shaft line extending in a lateral direction of the vehicle. At least part of a side of the battery box is formed along a virtual plane perpendicular to the lateral direction of the vehicle. A center of gravity of the battery box is positioned between a front end and a rear end of a saddle in a longitudinal direction of the vehicle when viewed from the lateral direction of the vehicle. The at least part of the side of the battery box overlaps with a swing range of the swing arm or the rear suspension when viewed from the lateral direction of the vehicle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bicycle, and more particularly, to a bicycle including a battery.

  The bicycle travels using the pedaling force of the passenger. Electric assist bicycles that assist the passenger's pedal effort with the driving force of the motor are popular. There has also been proposed an electric bicycle that uses a driving force of a motor according to the amount of grip operation.

  Such a bicycle includes a battery that supplies power to the motor. In order to increase the power stored in the battery, it is necessary to increase the capacity of the battery. However, increasing the capacity of the battery increases the size of the battery. Also, the weight of the battery increases. When the weight of the battery increases, it is necessary to arrange the battery in consideration of the weight balance of the vehicle.

  Moreover, there is a sports type bicycle as a bicycle using the driving force of the motor as described above. Such a bicycle is disclosed in, for example, Japanese Patent Application Laid-Open No. 2006-103474.

  The bicycle described in the above publication includes a pedal and a saddle. The bicycle described in the above publication further includes a motor unit support bracket that supports the motor unit and a rear frame that supports the rear wheel. The rear frame is swingably connected to the motor unit support bracket. The motor unit support bracket is connected to a lower end portion of a rear suspension that absorbs an impact from the rear wheel.

JP 2006-103474 A

  In the bicycle including the pedal and the saddle described in the above publication, a battery for supplying electric power to the motor unit is disposed in front of and above the rear suspension. This is probably because the battery was placed in a vacant space after the arrangement of the rear suspension was decided. As described above, in a bicycle, the degree of freedom in designing the arrangement of the pedal, saddle, swing arm, rear suspension, and battery is likely to be limited.

  An object of the present invention is to improve the degree of design freedom regarding the arrangement of a swing arm or a rear suspension and a battery in a bicycle including a pedal and a saddle.

Means for Solving the Problems and Effects of the Invention

  A bicycle according to an embodiment of the present invention includes a pedal, a saddle, a body frame, a battery box, a rear wheel, a swing arm, and a rear suspension. A pedal is operably provided on the body frame. The body frame supports the saddle. The battery box is attached to the vehicle body frame. The battery box accommodates a battery. The rear wheel is disposed behind the vehicle body frame. The swing arm is disposed so as to be swingable in the vertical direction of the vehicle with respect to the vehicle body frame. The swing arm supports the rear wheel. The rear suspension connects the vehicle body frame and the swing arm. The swing arm and the rear suspension are each swingable about a swing axis extending in the left-right direction of the vehicle. The center of gravity of the battery box is located between the front end and the rear end of the saddle in the vehicle front-rear direction when viewed from the left-right direction of the vehicle. The battery box has a side surface. At least a part of the side surface is formed along a virtual plane perpendicular to the left-right direction of the vehicle. At least a part of the side surface of the battery box overlaps the swing range of the swing arm or the rear suspension when viewed from the left-right direction of the vehicle.

  In the above bicycle, the center of gravity of the battery box is located between the front end and the rear end of the saddle in the front-rear direction of the vehicle when viewed from the left-right direction of the vehicle. By somewhat restricting the position of the heavy battery, the degree of freedom regarding the arrangement of the swing arm or the rear suspension when the weight balance of the vehicle is taken into consideration can be improved.

  In the bicycle described above, the swing arm and the rear suspension are provided so as to be swingable around a swing axis extending in the left-right direction of the vehicle. Thereby, the side surface in the swing range of the swing arm or the rear suspension is formed along a virtual plane perpendicular to the left-right direction of the vehicle. In accordance with this, at least a part of the side surface of the battery box is formed along a virtual plane perpendicular to the left-right direction of the vehicle. In addition, at least a part of the side surface of the battery box is disposed at a position overlapping the swing range of the swing arm or the rear suspension when viewed from the left-right direction of the vehicle. Interference between the swing arm or the rear suspension and the battery box can be easily avoided. Therefore, the degree of freedom regarding the arrangement of the swing arm or the rear suspension can be further improved. In addition, the degree of freedom regarding the positional relationship between the swing arm or the rear suspension and the battery box can be further improved. Therefore, in a bicycle including a pedal and a saddle, it is possible to improve the degree of design freedom regarding the arrangement of the swing arm or the rear suspension and the battery box.

  For example, when the shape of the battery box when viewed from the left-right direction of the vehicle is a rectangle, the center of gravity of the battery box is located near the intersection of diagonal lines of the rectangle. That is, the center of gravity of the battery box substantially coincides with the center of the outer shape of the battery box when viewed from the left-right direction of the vehicle. In an actual vehicle, the center of gravity of the battery box can be obtained by measurement.

  The side surface of the battery box is a surface that is visible from the left-right direction of the vehicle among the outer surfaces of the battery box.

  A mode in which at least a part of the side surface of the battery box is along the virtual plane is not only a mode in which at least a part of the side surface of the battery box is parallel to the virtual plane, Including the embodiment. The upper limit of the angle at which at least a part of the side surface of the battery box is inclined with respect to the virtual plane is, for example, 30 °. That is, in the embodiment of the present invention, if the angle at which at least part of the side surface of the battery box is inclined with respect to the virtual plane is 30 ° or less, at least part of the side surface of the battery box is along the virtual plane. It is assumed that it is formed.

  The body frame may directly support the saddle or indirectly support the saddle. The aspect in which the body frame indirectly supports the saddle includes, for example, an aspect in which the body frame supports the saddle via a seat post.

  In the above bicycle, at least a part of the side surface of the battery box overlaps the swing range of the swing arm or the rear suspension between the front end and the rear end of the saddle in the vehicle front-rear direction when viewed from the left-right direction of the vehicle. May be arranged. Thereby, the freedom degree regarding arrangement | positioning of the rocking | swiveling arm or a rear suspension when the weight balance of a vehicle is considered can be improved. Therefore, in a bicycle including a pedal and a saddle, the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery box can be improved.

  In the above bicycle, each of the battery box and the swing arm may not be located at the center in the left-right direction of the vehicle in a plan view of the vehicle. Even in such an aspect, the degree of freedom regarding the arrangement of the swing arm or the rear suspension when the weight balance of the vehicle is taken into consideration can be improved. Therefore, in a bicycle including a pedal and a saddle, the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery box can be improved.

  In the above bicycle, either the battery box or the swing arm may be located at the center in the left-right direction of the vehicle in a plan view of the vehicle. Even in such an aspect, the degree of freedom regarding the arrangement of the swing arm or the rear suspension when the weight balance of the vehicle is taken into consideration can be improved. Therefore, in a bicycle including a pedal and a saddle, the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery box can be improved.

  The swing arm may be arranged in one of the left and right directions of the vehicle with respect to the seat frame of the vehicle body frame in a plan view of the vehicle. In this case, the battery box is preferably arranged on the opposite side of the swing arm in the left-right direction of the vehicle with respect to the seat frame in a plan view of the vehicle. Even in such an aspect, the degree of freedom regarding the arrangement of the swing arm or the rear suspension when the weight balance of the vehicle is taken into consideration can be improved. Therefore, in a bicycle including a pedal and a saddle, the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery box can be improved.

  In the aspect as described above, the rear suspension may be disposed on the opposite side of the battery box in the left-right direction of the vehicle with respect to the seat frame in a plan view of the vehicle. Even in such an aspect, the degree of freedom regarding the arrangement of the swing arm or the rear suspension when the weight balance of the vehicle is taken into consideration can be improved. Therefore, in a bicycle including a pedal and a saddle, the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery box can be improved.

  In the aspect as described above, the rear suspension may be disposed in front of the seat frame in a side view of the vehicle. Even in such an aspect, the degree of freedom regarding the arrangement of the swing arm or the rear suspension when the weight balance of the vehicle is taken into consideration can be improved. Therefore, in a bicycle including a pedal and a saddle, the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery box can be improved.

  The swing arm may include a first swing arm, a second swing arm, and a connection arm. Here, the first swing arm is arranged in one of the left and right directions of the vehicle with respect to the seat frame of the vehicle body frame in a plan view of the vehicle. The second swing arm is disposed on the opposite side of the first swing arm in the left-right direction of the vehicle with respect to the seat frame in a plan view of the vehicle. The connecting arm is disposed in front of the seat frame and connects the first swing arm and the second swing arm.

  In this case, the battery box is preferably arranged between the first swing arm and the second swing arm in a plan view of the vehicle. In such an aspect, the battery box can be protected by the first swing arm and the second swing arm. Further, it is possible to improve the degree of freedom regarding the arrangement of the swing arm or the rear suspension in consideration of the weight balance of the vehicle. Therefore, in a bicycle including a pedal and a saddle, the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery box can be improved.

  In the above aspect, the first swing arm includes a first arm portion and a second arm portion. The first arm portion and the second arm portion extend in the front-rear direction of the vehicle. The second arm portion is disposed in front of the first arm portion and overlaps the battery box in a side view of the vehicle. The front part of the second arm part is detachably connected to the connection arm. The rear part of the second arm part is rotatably connected to the first arm part.

  In this case, a gap is formed between the second arm portion and the connecting arm portion by rotating the second arm portion with respect to the first arm portion. As a result, the battery box can be easily attached and detached.

  Further, it is possible to improve the degree of freedom regarding the arrangement of the swing arm or the rear suspension in consideration of the weight balance of the vehicle. Therefore, in a bicycle including a pedal and a saddle, the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery box can be improved.

  In the above aspect, preferably, a groove is formed in the battery box. The groove accommodates at least a part of the seat frame in a state where the battery box is attached to the seat frame. The battery box includes a front part and a rear part. The front portion is located in front of the seat frame in a side view of the vehicle. The rear portion is located behind the seat frame in a side view of the vehicle.

  In this case, the battery box can be brought closer to the center in the left-right direction of the vehicle.

  Further, it is possible to improve the degree of freedom regarding the arrangement of the swing arm or the rear suspension in consideration of the weight balance of the vehicle. Therefore, in a bicycle including a pedal and a saddle, the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery box can be improved.

1 is a left side view showing an electric bicycle according to a first embodiment of the present invention. 1 is a plan view showing an electric bicycle according to a first embodiment of the present invention. It is a left view which shows the rocking | fluctuation range of the rocking | fluctuation arm which the electric bicycle by the 1st Embodiment of this invention has. It is a left view which shows the electric bicycle by the 2nd Embodiment of this invention. It is a top view which shows the electric bicycle by the 2nd Embodiment of this invention. It is a left view which shows the rocking | fluctuation range of the rocking | fluctuation arm which the electric bicycle by the 2nd Embodiment of this invention has. It is a left view which shows the electric bicycle by the 3rd Embodiment of this invention. It is a top view which shows the electric bicycle by the 3rd Embodiment of this invention. It is a left view which shows the rocking | fluctuation range of the rocking | fluctuation arm which the electric bicycle by the 3rd Embodiment of this invention has. It is a top view which shows the electric bicycle by the 3rd Embodiment of this invention, Comprising: It is a top view which shows the state which can remove a battery box.

  In order to concentrate the mass, for example, it is conceivable to arrange a battery for a seat frame that supports the saddle in the body frame.

  However, in a sports type bicycle, a rear suspension is disposed near the seat frame. For this reason, when the battery is disposed near the seat frame, the battery needs to be disposed at a position that does not interfere with the rear suspension.

  Here, the battery has a large weight. For this reason, simply placing the battery at a position that does not interfere with the rear suspension tends to limit the degree of freedom regarding the arrangement of the swing arm or the rear suspension and the battery in consideration of the weight balance of the vehicle.

  The inventor of the present application paid attention to the position of the center of gravity of the battery box that accommodates the battery when examining the arrangement of the swing arm or the rear suspension and the battery in a bicycle including a pedal and a saddle. By positioning the center of gravity of the battery box between the front end and the rear end of the saddle in the longitudinal direction of the vehicle, the degree of freedom regarding the arrangement of the swing arm or the rear suspension when the weight balance of the vehicle is taken into consideration is improved. I found out that I can. Further, when the rear suspension absorbs an impact from the rear wheel, attention is paid to the fact that a member (for example, a rear arm) that supports the rear wheel swings in a plane extending in the front-rear direction and the vertical direction of the vehicle. Then, it is found that the degree of freedom in designing the arrangement of the swing arm or the rear suspension and the battery can be improved by arranging the battery box close to the member supporting the rear wheel in the left-right direction of the vehicle. It was. The present invention has been completed based on such knowledge.

  Hereinafter, a bicycle according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, an electric bicycle is described as an example of a bicycle. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description of the members will not be repeated.

[First Embodiment]
FIG. 1 is a left side view of an electric bicycle 10 according to a first embodiment of the present invention. The electric bicycle 10 includes an electric drive system for driving front wheels and rear wheels by a motor. In addition, the electric bicycle 10 includes a human power drive system for driving the rear wheel 20 by human power.

  In the following description, front / rear / left / right means front / rear / left / right as viewed from a passenger seated on the saddle 32 of the electric bicycle 10. In FIG. 1, the arrow F indicates the forward direction of the electric bicycle 10, and the arrow U indicates the upward direction of the electric bicycle 10.

  The electric bicycle 10 includes a body frame 12, a swing arm 14, a rear suspension 16, a front wheel 18, and a rear wheel 20.

  The vehicle body frame 12 includes a head pipe 22, an upper pipe 24, a front pipe 26, a seat pipe 28, and a bottom bracket 30.

  The upper pipe 24 extends rearward from the head pipe 22. The front pipe 26 is disposed below the upper pipe 24 and extends rearward and downward from the head pipe 22. The rear end of the front pipe 26 is connected to the bottom bracket 30. The seat pipe 28 extends upward from the bottom bracket 30. The rear end of the upper pipe 24 is connected to the seat pipe 28. A saddle 32 is attached to the upper end of the seat pipe 28. A battery box 34 that houses a battery is attached to the seat pipe 28. Details of the battery box 34 will be described later. Further, although not shown in the figure, the motors to which the battery supplies power are disposed in the hubs of the front wheels 18 and the rear wheels 20, for example. The motor may not be disposed in the hub of the front wheel 18 and the rear wheel 20. For example, the motor may be disposed in a drive unit that is attached to the vehicle body frame 12.

  A steering shaft 44 is rotatably inserted into the head pipe 22. A front fork 46 is attached to the lower end of the steering shaft 44. A front wheel 18 is rotatably attached to the lower end of the front fork 46. A handle 48 is attached to the upper end of the steering shaft 44. When the occupant rotates the handle 48, the steering shaft 44 rotates. Along with this, the front fork 46 and the front wheel 18 rotate. As a result, the traveling direction of the vehicle changes.

  A crankshaft 36 is rotatably attached to the bottom bracket 30. Crank arms 38 are attached to both ends of the crankshaft 36. A pedal 40 is attached to the crank arm 38. When the occupant operates the pedal 40 (specifically, the pedal 40 is depressed), the crankshaft 36 rotates. A front sprocket 42 is attached to the crankshaft 36.

  A rear wheel 20 is disposed behind the vehicle body frame 12. A rear sprocket 50 (see FIG. 2) is disposed on the rear wheel 20. An endless chain 52 is wound around the rear sprocket 50 and the front sprocket 42. The rotation of the crankshaft 36 is transmitted from the front sprocket 42 to the rear sprocket 50 via the chain 52.

  The swing arm 14 is connected to the vehicle body frame 12 via a rear suspension 16. The swing arm 14 supports the rear wheel 20. Details of the swing arm 14 and the rear suspension 16 will be described later.

  Next, the swing arm 14 will be described with reference to FIGS. 1 and 2. FIG. 2 is a plan view of the electric bicycle 10. In FIG. 2, the handle 48 and the steering shaft 44 are not shown. Further, in FIG. 2, the saddle 32 is indicated by a virtual line. Referring to FIG. 2, swing arm 14 includes a left arm 54, a right arm 56, and a connecting portion 58.

  As shown in FIG. 1, the left arm 54 extends in the front-rear direction of the vehicle in a side view of the vehicle. The left arm 54 intersects the seat pipe 28 in a side view of the vehicle (see FIG. 1). The left arm 54 intersects the front pipe 26 in a side view of the vehicle (see FIG. 1).

  As shown in FIG. 2, the left arm 54 is disposed on the left side of the vehicle body frame 12 and the rear wheel 20 in the left-right direction of the vehicle. The left arm 54 includes an arm portion 54A and an arm portion 54B.

  As shown in FIG. 2, the arm portion 54A extends in the front-rear direction of the vehicle in a plan view of the vehicle. The arm portion 54A includes the rear end of the left arm 54. The rear end portion of the arm portion 54A supports the rear wheel 20 in a rotatable manner.

  As shown in FIG. 2, the arm portion 54B is disposed in front of the arm portion 54A. The arm portion 54B includes the front end of the left arm 54. The arm portion 54B extends in the front-rear direction and the left-right direction of the vehicle in a plan view of the vehicle. Specifically, it extends from the front end of the arm portion 54A toward the front and right side of the vehicle. That is, the rear end of the arm portion 54B is connected to the front end of the arm portion 54A. The front end portion of the arm portion 54B is connected to the front pipe 26 via a support portion 26A formed on the front pipe 26.

  As shown in FIG. 2, the right arm 56 extends in the front-rear direction of the vehicle in a plan view of the vehicle. The right arm 56 is disposed on the right side of the vehicle body frame 12 and the rear wheel 20 in the left-right direction of the vehicle. The rear end portion of the right arm 56 supports the rear wheel 20 in a rotatable manner. A front end portion of the right arm 56 is connected to a connecting portion 58.

  As shown in FIG. 2, the connecting portion 58 extends in the left-right direction of the vehicle. The right end of the connecting portion 58 is connected to the front end portion of the right arm 56. The left end of the connecting portion 58 is connected to the left arm 54 (specifically, the arm portion 54A). The connecting position of the connecting portion 58 to the left arm 54 is behind the vehicle body frame 12.

  Subsequently, the rear suspension 16 will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the rear suspension 16 connects the vehicle body frame 12 and the swing arm 14. Specifically, the upper end portion of the rear suspension 16 is connected to the seat pipe 28 via a support portion 28 </ b> A formed on the seat pipe 28. A lower end portion of the rear suspension 16 is coupled to the coupling portion 58 via a support portion 58 </ b> A formed on the coupling portion 58. In the rear suspension 16, the connection position to the seat pipe 28 is located in front of the connection position to the connection portion 58. That is, the rear suspension 16 is inclined forward and upward.

  A part of the rear suspension 16 (specifically, a part connected to the seat pipe 28) overlaps the seat pipe 28 in a side view of the vehicle as shown in FIG. A part of the rear suspension 16 overlaps a portion of the battery box 34 located behind the seat pipe 28 in a side view of the vehicle. That is, the rear suspension 16 is located behind the portion of the battery box 34 located in front of the seat pipe 28 in a side view of the vehicle.

  As shown in FIG. 2, the rear suspension 16 is disposed on the left side of the vehicle body frame 12. Specifically, the rear suspension 16 is disposed between the seat pipe 28 and the left arm 54 in a plan view of the vehicle.

  When the electric bicycle 10 travels, the rear wheel 20 may move up and down. For example, when the electric bicycle 10 gets over a level difference, the rear wheel 20 moves in the vertical direction. When the rear wheel 20 moves in the vertical direction, the swing arm 14 swings in the vertical direction. FIG. 3 shows the swing range of the swing arm 14.

  The rear suspension 16 suppresses the swing of the swing arm 14 in the vertical direction. Specifically, the rear suspension 16 suppresses the swing of the swing arm 14 by suppressing the swing of the left arm 54 and the right arm 56 via the connecting portion 58 to which the rear suspension 16 is connected. .

  When the swing arm 14 swings, the left arm 54 swings in the vertical direction. When the left arm 54 swings in the vertical direction, the arm portion 54A swings in a plane P1 (see FIG. 2) as a virtual plane that extends in the vertical direction and the front-rear direction. That is, the plane P1 is a plane perpendicular to the left-right direction of the vehicle.

  Next, the battery box 34 will be described with reference to FIGS. 1 and 2. The battery box 34 is disposed at a position where it does not interfere with the swing arm 14 and the rear suspension 16.

  Specifically, as shown in FIG. 2, the battery box 34 is disposed on the right side of the vehicle body frame 12 in a plan view of the vehicle. That is, the battery box 34 is disposed on the opposite side of the vehicle body frame 12 from the rear suspension 16 and the left arm 54. In other words, the battery box 34 is disposed at a position that does not overlap the rear suspension 16 and the left arm 54 in a plan view of the vehicle. That is, the battery box 34 is arranged at a position where it does not interfere with the rear suspension 16 and the left arm 54.

  As shown in FIG. 1, the battery box 34 is located in front of and above the connecting portion 58 in a side view of the vehicle. That is, the battery box 34 is arranged at a position that does not overlap the connecting portion 58 in a side view of the vehicle. Contact of the connecting portion 58 to the battery box 34 is prevented by the rear suspension 16. That is, the battery box 34 is disposed at a position where it does not interfere with the connecting portion 58.

  As shown in FIG. 2, the battery box 34 is located on the left side of the right arm 56 in a plan view of the vehicle. That is, the battery box 34 is arranged at a position that does not overlap the right arm 56 in a plan view of the vehicle. In other words, the battery box 34 is disposed at a position where it does not interfere with the right arm 56.

  As shown in FIG. 2, the battery box 34 has a pair of side surfaces 34 </ b> L and 34 </ b> R in a plan view of the vehicle. The side surfaces 34L and 34R are parallel to a plane P1 on which the arm portion 54A swings. That is, the side surfaces 34L and 34R are formed along the plane P1. The pair of side surfaces 34L and 34R are located between the body frame 12 and the chain 52 in a plan view of the vehicle.

  As shown in FIG. 1, the battery box 34 intersects the seat pipe 28 in a side view of the vehicle. That is, a part of the battery box 34 overlaps the seat pipe 28 in a side view of the vehicle. More specifically, a part of the side surface 34L of the battery box 34 overlaps with the seat pipe 28 when viewed from the left side of the vehicle.

  As shown in FIG. 1, the battery box 34 is positioned below the upper pipe 24 in a side view of the vehicle. That is, the battery box 34 is arranged at a position that does not overlap the upper pipe 24 in a side view of the vehicle.

  As shown in FIG. 1, the battery box 34 is located behind the front pipe 26 in a side view of the vehicle. That is, the battery box 34 is arranged at a position that does not overlap the front pipe 26 in a side view of the vehicle.

  As shown in FIG. 1, the battery box 34 is located above the bottom bracket 30 in a side view of the vehicle. That is, the battery box 34 is arranged at a position that does not overlap the bottom bracket 30 in a side view of the vehicle.

  As shown in FIG. 1, the battery box 34 intersects the left arm 54 in a side view of the vehicle. That is, a part of the battery box 34 overlaps the left arm 54 in a side view of the vehicle. As shown in FIG. 3, a part of the battery box 34 overlaps the left arm 54 within the swing range of the swing arm 14 in a side view of the vehicle. More specifically, a part of the side surface 34L of the battery box 34 overlaps the left arm 54 within the swing range of the swing arm 14 when viewed from the left side of the vehicle.

  As shown in FIG. 1, the battery box 34 has a pair of side surfaces 34 </ b> A and 34 </ b> B in a side view of the vehicle. The side surfaces 34A and 34B extend in the same direction as the direction in which the seat pipe 28 extends in a side view of the vehicle. The side surface 34A is located in front of the side surface 34B in a side view of the vehicle.

  As shown in FIG. 1, the side surface 34 </ b> A is positioned in front of the seat pipe 28 in a side view of the vehicle. The side surface 34B is located behind the seat pipe 28 in a side view of the vehicle. The side surface 34B intersects with the rear suspension 16 in a side view of the vehicle. A part of the side surface 34B overlaps the left arm 54 in a side view of the vehicle.

  As shown in FIG. 1, the battery box 34 has a pair of side surfaces 34U and 34D in a side view of the vehicle. The side surfaces 34U and 34D extend in a direction perpendicular to the direction in which the seat pipe 28 extends in a side view of the vehicle. That is, the side surfaces 34U and 34D are perpendicular to the side surfaces 34A and 34B. The side surface 34U is located above the side surface 34D.

  As shown in FIG. 1, the side surface 34U intersects the seat pipe 28 in a side view of the vehicle. The side surface 34U is located below the upper pipe 24 in a side view of the vehicle. The side surface 34U is located slightly above the position where the rear suspension 16 is connected to the seat pipe 28 in a side view of the vehicle.

  As shown in FIG. 1, the side surface 34D intersects the seat pipe 28 in a side view of the vehicle. The side surface 34D is located below the position where the rear suspension 16 is connected to the connecting portion 58 in a side view of the vehicle. A part of the side surface 34D overlaps the left arm 54 in a side view of the vehicle. The side surface 34D is located behind the front pipe 26 and above the bottom bracket 30 in a side view of the vehicle.

  The battery box 34 is attached to the seat pipe 28 via a bracket fixed to the seat pipe 28, for example. The battery box 34 is detachable from the seat pipe 28.

  The center of gravity 34G of the battery box 34 is located between the front end and the rear end of the saddle 32 in a side view of the vehicle. The center of gravity 34G of the battery box 34 overlaps the seat pipe 28 in a side view of the vehicle. The center of gravity 34G of the battery box 34 is located in front of the rear suspension 16 in a side view of the vehicle. The center of gravity 34G of the battery box 34 is positioned above the swing arm 14 in a side view of the vehicle.

  In the electric bicycle 10, the left arm 54 is disposed on the left side of the body frame 12. A battery box 34 is disposed on the right side of the vehicle body frame 12. A part of the left arm 54 overlaps the battery box 34 in a side view of the vehicle. Therefore, the degree of freedom regarding the arrangement of the swing arm 14 or the rear suspension 16 when considering the weight balance of the vehicle can be improved. Therefore, in the electric bicycle 10, the degree of design freedom regarding the arrangement of the swing arm 14 or the rear suspension 16 and the battery box 34 can be improved.

  In the electric bicycle 10, the side surface 34L of the battery box 34 is parallel to the plane P1. Therefore, the battery box 34 can be disposed close to the arm portion 54A in the left-right direction of the vehicle. As a result, the vehicle width of the electric bicycle 10 can be suppressed from increasing.

  In the electric bicycle 10, the rear suspension 16 is disposed on the side opposite to the battery box 34 with respect to the vehicle body frame 12. Therefore, the degree of freedom regarding the arrangement of the swing arm 14 or the rear suspension 16 when considering the weight balance of the vehicle can be improved. Therefore, in the electric bicycle 10, the degree of design freedom regarding the arrangement of the swing arm 14 or the rear suspension 16 and the battery box 34 can be improved.

  In the electric bicycle 10, the center of gravity 34G of the battery box 34 is located between the front end and the rear end of the saddle 32 in a side view of the vehicle. By somewhat restricting the position of the heavy battery, the degree of freedom regarding the arrangement of the swing arm or the rear suspension when the weight balance of the vehicle is taken into consideration can be improved.

[Second Embodiment]
Next, an electric bicycle 10A according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a left side view of the electric bicycle 10A. FIG. 5 is a plan view of the electric bicycle 10A. In FIG. 5, the illustration of the handle 48 and the steering shaft 44 is omitted. In FIG. 5, the saddle 32 is indicated by a virtual line.

  The electric bicycle 10A is different from the electric bicycle 10 according to the first embodiment in that it includes a swing arm 14A instead of the swing arm 14. The swing arm 14A includes a pair of left and right lower arms 60, 60, a left arm 62, a right arm 64, a connecting portion 66, and a pair of left and right connecting portions 68, 68.

  As shown in FIG. 4, the pair of left and right lower arms 60, 60 extend in the front-rear direction of the vehicle in a side view of the vehicle. The pair of left and right lower arms 60, 60 are arranged symmetrically in the left-right direction of the vehicle. Therefore, in FIG. 4, the right lower arm 60 is hidden behind the left lower arm 60 in a side view of the vehicle. A front end portion of each lower arm 60 is connected to a support portion 30 </ b> A formed on the bottom bracket 30 so as to be swingable.

  As shown in FIG. 4, the left arm 62 extends in the front-rear direction of the vehicle in a side view of the vehicle. Specifically, the left arm 62 extends forward and upward from the rear end portion of the left lower arm 60 of the pair of lower arms 60, 60 in a side view of the vehicle.

  As shown in FIG. 4, the left arm 62 intersects the seat pipe 28 and the battery box 34 in a side view of the vehicle. That is, a part of the left arm 62 overlaps with the seat pipe 28 and the battery box 34 in a side view of the vehicle. More specifically, a part of the left arm 62 overlaps the seat pipe 28 and the side surface 34L of the battery box 34 when viewed from the left side of the vehicle.

  As shown in FIG. 4, the left arm 62 is located above the side surface 34 </ b> D of the battery box 34 in a side view of the vehicle. The left arm 62 is located below the side surface 34U of the battery box 34 in a side view of the vehicle. The left arm 62 intersects the side surfaces 34A and 34B of the battery box 34 in a side view of the vehicle.

  As shown in FIG. 5, the left arm 62 is disposed on the left side of the vehicle body frame 12 and the rear wheel 20 in a plan view of the vehicle. The left arm 62 includes an arm portion 62A, an arm portion 62B, and an arm portion 62C.

  The arm portion 62A includes the rear end of the left arm 62. As shown in FIG. 5, the arm portion 62 </ b> A extends in the front-rear direction of the vehicle in a plan view of the vehicle. As shown in FIG. 4, the rear end portion of the arm portion 62A is connected to the rear end portion of the left lower arm 60 in a side view of the vehicle. The rear wheel 20 is rotatably supported at a connection portion between the arm portion 62A and the lower arm 60 on the left side.

  The arm portion 62B includes the front end of the left arm 62. As shown in FIG. 5, the arm portion 62B is located in front of the arm portion 62A in a plan view of the vehicle. The arm portion 62B extends in the front-rear direction of the vehicle in a plan view of the vehicle. The arm portion 62B is disposed at a position different from the arm portion 62A in the left-right direction of the vehicle.

  The front end portion of the arm portion 62B is connected to the front pipe 26 via the rear suspension 16. As shown in FIG. 4, the rear suspension 16 is located in front of the battery box 34 and the seat pipe 28 in a side view of the vehicle. As shown in FIG. 5, the rear suspension 16 is disposed at a position overlapping the upper pipe 24 and the front pipe 26 in a plan view of the vehicle.

  As shown in FIG. 5, the arm part 62C is disposed between the arm part 62A and the arm part 62B in a plan view of the vehicle. The front end of the arm part 62C is connected to the rear end of the arm part 62B. The rear end of the arm part 62C is connected to the front end of the arm part 62A.

  When the electric bicycle 10A travels, the rear wheel 20 may move up and down. For example, when the electric bicycle 10A gets over the step, the rear wheel 20 moves in the vertical direction. When the rear wheel 20 moves in the vertical direction, the swing arm 14A swings in the vertical direction. FIG. 6 shows the swing range of the swing arm 14.

  The rear suspension 16 suppresses the swing of the swing arm 14A in the vertical direction. Specifically, the rear suspension 16 suppresses the swing of the swing arm 14A including the left arm 62 by suppressing the swing of the left arm 62 including the arm portion 62B to which the rear suspension 16 is coupled.

  When the swing arm 14A swings, the left arm 62 swings up and down. When the left arm 62 swings in the vertical direction, the arm portion 62B swings in a plane P2 as a virtual plane extending in the vertical direction and the front-rear direction. That is, the plane P2 is a plane perpendicular to the left-right direction of the vehicle. As shown in FIG. 6, part of the battery box 34 overlaps the left arm 62 within the swing range of the swing arm 14 </ b> A in a side view of the vehicle. More specifically, a part of the side surface 34L of the battery box 34 overlaps the left arm 62 within the swing range of the swing arm 14A when viewed from the left side of the vehicle.

  As shown in FIG. 5, the right arm 64 extends in the front-rear direction of the vehicle. The right arm 64 is disposed on the right side of the vehicle body frame 12 and the rear wheel 20 in the left-right direction of the vehicle. The rear end portion of the right arm 64 is connected to the rear end portion of the right lower arm 60 of the pair of lower arms 60, 60. The rear wheel 20 is rotatably supported at a connection portion between the right arm 64 and the right lower arm 60. The front end portion of the right arm 64 is connected to the connecting portion 66.

  The connecting portion 66 extends in the left-right direction of the vehicle. The right end of the connecting portion 66 is connected to the front end portion of the right arm 64. The left end of the connecting portion 66 is connected to the left arm 62 (specifically, the arm portion 62A). The connecting position of the connecting portion 66 to the left arm 62 is behind the vehicle body frame 12.

  The pair of left and right connecting portions 68 and 68 are disposed away from each other in the left and right direction of the vehicle. The pair of left and right connecting portions 68 and 68 are arranged symmetrically in the left and right direction of the vehicle. Therefore, the right connecting portion 68 is hidden behind the left connecting portion 68 in a side view of the vehicle. Each connecting portion 68 extends in the vertical direction. The left connecting portion 68 connects the left arm 62 and the left lower arm 60. Although not explicitly shown in the drawing, the right connecting portion 68 connects the right arm 64 and the right lower arm 60.

  The battery box 34 is arranged on the right side of the seat pipe 28 as in the first embodiment. In the present embodiment, side surfaces 34L and 34R of battery box 34 are parallel to plane P2 when arm portion 62B swings. That is, the side surfaces 34L and 34R are formed along the plane P2.

  In the electric bicycle 10 </ b> A, the left arm 62 is disposed on the left side of the body frame 12. A battery box 34 is disposed on the right side of the vehicle body frame 12. The left arm 62 overlaps the battery box 34 in a side view of the vehicle. Therefore, the degree of freedom regarding the arrangement of the swing arm 14 or the rear suspension 16 when considering the weight balance of the vehicle can be improved. Therefore, in the electric bicycle 10 </ b> A, the degree of freedom in design regarding the arrangement of the swing arm 14 or the rear suspension 16 and the battery box 34 can be improved.

  In the electric bicycle 10A, the side surface 34L of the battery box 34 is parallel to the plane P2. Therefore, the battery box 34 can be disposed close to the arm portion 62B in the left-right direction of the vehicle. as a result. An increase in the width of the electric bicycle 10A can be avoided.

  In the electric bicycle 10A, the rear suspension 16 is disposed at a position overlapping the upper pipe 24 and the front pipe 26 in a plan view of the vehicle. Therefore, it is possible to suppress an increase in the size in the left-right direction of the electric bicycle 10A.

[Third Embodiment]
Next, an electric bicycle 10B according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a left side view of the electric bicycle 10B. FIG. 8 is a plan view of the electric bicycle 10B. In FIG. 8, the handle 48 and the steering shaft 44 are not shown. In FIG. 8, the saddle 32 is indicated by a virtual line.

  The electric bicycle 10B is different from the electric bicycle 10 according to the first embodiment in that a rocking arm 14B is provided instead of the rocking arm 14. The swing arm 14B includes a pair of left and right lower arms 70 and 70, a left arm 72, a right arm 74, a connecting portion 76, a connecting portion 78, and a pair of left and right connecting portions 80 and 80.

  As shown in FIG. 7, the pair of left and right lower arms 70 and 70 extend in the front-rear direction of the vehicle in a side view of the vehicle. The pair of left and right lower arms 70, 70 are arranged symmetrically in the left-right direction of the vehicle. Therefore, in FIG. 7, the right lower arm 70 is hidden behind the left lower arm 70 in a side view of the vehicle. A front end portion of each lower arm 70 is connected to a support portion 30 </ b> A formed on the bottom bracket 30 so as to be swingable.

  As shown in FIG. 7, the left arm 72 extends in the front-rear direction of the vehicle in a side view of the vehicle. Specifically, the left arm 72 extends forward and upward from the rear end portion of the left lower arm 70 out of the pair of lower arms 70, 70 in a side view of the vehicle. The left arm 72 intersects the seat pipe 28 in a side view of the vehicle.

  As shown in FIG. 8, the left arm 72 is disposed on the left side of the vehicle body frame 12 in a plan view of the vehicle. The left arm 72 includes an arm part 72A, an arm part 72B, and an arm part 72C.

  The arm portion 72A includes the rear end of the left arm 72. As shown in FIG. 8, the arm portion 72A extends in the front-rear direction of the vehicle in a plan view of the vehicle. The rear end portion of the arm portion 72A is connected to the rear end portion of the left lower arm 70 as shown in FIG. The rear wheel 20 is rotatably supported at a connection portion between the arm portion 72A and the lower arm 70 on the left side.

  The arm portion 72B includes the front end of the left arm 72. As shown in FIG. 8, the arm portion 72B is located in front of the arm portion 72A in a plan view of the vehicle. The arm portion 72B extends in the front-rear direction of the vehicle in a plan view of the vehicle. The arm portion 72B is disposed at a position different from the arm portion 72A in the left-right direction of the vehicle.

  The front end portion of the arm portion 72 </ b> B is connected to the connecting portion 76. As shown in FIG. 8, the connecting portion 76 extends in the left-right direction of the vehicle.

  As shown in FIG. 8, the arm portion 72C is disposed between the arm portion 72A and the arm portion 72B in a plan view of the vehicle. The front end of the arm portion 72C is connected to the rear end of the arm portion 72B. The rear end of the arm portion 72C is connected to the front end of the arm portion 72A.

  As shown in FIG. 8, the right arm 74 is disposed on the right side of the vehicle body frame 12 in a plan view of the vehicle. The right arm 74 is disposed symmetrically with respect to the left arm 72 in the left-right direction of the vehicle. That is, as shown in FIG. 7, the right arm 74 is hidden by the left arm 72 in a side view of the vehicle.

  As shown in FIG. 8, the right arm 74 extends in the front-rear direction of the vehicle in a plan view of the vehicle. Similarly to the left arm 72, the right arm 74 intersects the seat pipe 28 in a side view of the vehicle. The right arm 74 includes a rear arm 74A and a front arm 74B.

  The rear arm 74A includes a rear end of the right arm 74. As shown in FIG. 8, the rear arm 74A extends in the front-rear direction of the vehicle in a plan view of the vehicle. The rear end portion of the rear arm 74 </ b> A is connected to the rear end portion of the right lower arm 70 out of the pair of lower arms 70 and 70. The rear wheel 20 is rotatably supported at a connection portion between the rear arm 74A and the right lower arm 70.

  The front end portion of the rear arm 74 </ b> A is connected to the connecting portion 78. As shown in FIG. 8, the connecting portion 78 extends in the left-right direction of the vehicle. The right end of the connecting portion 78 is connected to the front end portion of the rear arm 74A. The left end of the connecting portion 78 is connected to the left arm 72 (specifically, the arm portion 72A). The connecting position of the connecting portion 78 to the left arm 72 is behind the vehicle body frame 12.

  The front arm 74B includes the front end of the right arm 74. The front arm 74B includes an arm portion 74B1 and an arm portion 74B2.

  As shown in FIG. 8, the arm portion 74B1 extends from the front end portion of the rear arm 74A toward the front side and the left side of the vehicle in a plan view of the vehicle. The rear end portion of the arm portion 74B1 is rotatably connected to the front end portion of the rear arm 74A.

  As shown in FIG. 8, the arm portion 74B2 extends from the front end of the arm portion 74B1 toward the front of the vehicle in a plan view of the vehicle. The arm portion 74B2 is disposed at a position different from the rear arm 74A in the left-right direction of the vehicle. Specifically, the arm portion 74B2 is disposed closer to the vehicle body frame 12 (left side) than the rear arm 74A in the left-right direction of the vehicle. The front end of the arm portion 74B2 is detachably connected to the connecting portion 76.

  The pair of left and right connecting portions 80, 80 are arranged away from each other in the left-right direction of the vehicle. The pair of left and right connecting portions 80, 80 are arranged symmetrically in the left-right direction of the vehicle. Therefore, the right connecting portion 80 is hidden behind the left connecting portion 80 in a side view of the vehicle. Each connecting portion 80 extends in the vertical direction. The left connecting portion 80 connects the left arm 72 and the left lower arm 70. Although not explicitly shown in the drawing, the right connecting portion 80 connects the right arm 74 and the right lower arm 70.

  As shown in FIGS. 7 and 8, the rear suspension 16 connects the connecting portion 76 and the front pipe 26. Specifically, the upper end of the rear suspension 16 is connected to the connecting portion 76. The lower end of the rear suspension 16 is connected to the front pipe 26.

  As shown in FIG. 7, the rear suspension 16 is located in front of the seat pipe 28 in a side view of the vehicle. As shown in FIG. 8, the rear suspension 16 is disposed at a position overlapping the upper pipe 24 and the front pipe 26 in a plan view of the vehicle.

  When the electric bicycle 10B travels, the rear wheel 20 may move up and down. For example, when the electric bicycle 10B gets over the step, the rear wheel 20 moves in the vertical direction. When the rear wheel 20 moves in the vertical direction, the swing arm 14B swings in the vertical direction. FIG. 9 shows the swing range of the swing arm 14.

  The rear suspension 16 suppresses the swing of the swing arm 14B in the vertical direction. Specifically, the rear suspension 16 suppresses the swing of the swing arm 14B by suppressing the swing of the left arm 72 and the right arm 74 via the connecting portion 76 to which the rear suspension 16 is connected. .

  When the swing arm 14B swings, the left arm 72 and the right arm 74 swing vertically. When the left arm 72 swings in the vertical direction, the arm portion 72B swings in a plane P3 serving as a virtual plane extending in the vertical direction and the front-rear direction. When the right arm 74 swings in the vertical direction, the arm portion 74B2 of the front arm 74B swings in a plane P4 serving as a virtual plane extending in the vertical direction and the left-right direction. That is, the plane P3 and the plane P4 are planes perpendicular to the left-right direction of the vehicle.

  The electric bicycle 10 </ b> B is different from the electric bicycle 10 in that a battery box 341 is provided instead of the battery box 34. A groove 342 is formed in the battery box 341.

  As shown in FIGS. 7 and 8, the groove 342 is formed on the left side surface 34L of the pair of side surfaces 34L and 34R. As shown in FIG. 7, the groove 342 extends in parallel with the direction in which the seat pipe 28 extends in a side view of the vehicle. The groove 342 is formed from one side of the pair of side surfaces 34U and 34D to the other in a side view of the vehicle. That is, the groove 342 is formed over the entire length in the direction in which the seat pipe 28 extends in a side view of the vehicle. As shown in FIGS. 7 and 8, an intermediate portion in the longitudinal direction of the seat pipe 28 is accommodated in the groove 342. That is, the left side surface 34L is located in front of the seat pipe 28, located in the left side of the seat pipe 28, located in the rear of the seat pipe 28, and left of the seat pipe 28. And a portion located on the surface. In other words, the battery box 341 includes a front portion 34X positioned forward of the seat pipe 28 and a rear portion 34Y positioned rearward of the seat pipe 28.

  As shown in FIGS. 7 and 8, the battery box 341 intersects the left arm 72 and the right arm 74 in a side view of the vehicle. That is, a part of the battery box 341 overlaps with the left arm 72 and the right arm 74 in a side view of the vehicle. As shown in FIG. 9, a part of the battery box 341 overlaps the left arm 72 and the right arm 74 within the swing range of the swing arm 14B in a side view of the vehicle. More specifically, a part of the side surface 34L of the battery box 341 overlaps the left arm 72 within the swing range of the swing arm 14B when viewed from the left side of the vehicle.

  The side surface 34U of the battery box 341 is positioned above the left arm 72 and the right arm 74 in a side view of the vehicle as shown in FIGS. The side surface 34D of the battery box 341 is located below the left arm 72 and the right arm 74 in a side view of the vehicle. The side surfaces 34A and 34B of the battery box 341 intersect the left arm 72 and the right arm 74 in a side view of the vehicle.

  Of the pair of side surfaces 34L, 34R, the left side surface 34L is parallel to the plane P3. That is, the side surface 34L is formed along the plane P3. Of the pair of side surfaces 34L and 34R, the right side surface 34R is parallel to the plane P4. That is, the side surface 34R is formed along the plane P4.

  The battery box 341 can be attached to and detached from the seat pipe 28. In this embodiment, the battery box 341 can be easily attached and detached. This will be described with reference to FIG. In FIG. 10, the illustration of the handle 48, the steering shaft 44, and the saddle 32 is omitted.

  When removing the battery box 341 from the seat pipe 28, as shown in FIG. 10, the front arm 74B is rotated with respect to the rear arm 74A in a plan view of the vehicle. As a result, the front arm 74B is separated from the battery box 341. As a result, the work of attaching / detaching the battery box 341 to / from the seat pipe 28 is facilitated.

  In the electric bicycle 10B, the swing arm 14B includes a left arm 72 and a right arm 74. The rear suspension 16 is disposed at a position overlapping the upper pipe 24 and the front pipe 26 in a plan view of the vehicle. Therefore, the degree of freedom regarding the arrangement of the swing arm 14 or the rear suspension 16 when considering the weight balance of the vehicle can be improved. Therefore, in the electric bicycle 10 </ b> B, the degree of freedom in design related to the arrangement of the swing arm 14 or the rear suspension 16 and the battery box 34 can be improved.

  In the electric bicycle 10B, the front portion 34X of the battery box 341 is located in front of the seat pipe 28, and the rear portion 34Y of the battery box 341 is located behind the seat pipe 28. Therefore, the degree of freedom regarding the arrangement of the swing arm 14 or the rear suspension 16 when considering the weight balance of the vehicle can be improved. Therefore, in the electric bicycle 10 </ b> B, the degree of freedom in design related to the arrangement of the swing arm 14 or the rear suspension 16 and the battery box 34 can be improved.

  In the electric bicycle 10B, of the pair of side surfaces 34L and 34R included in the battery box 341, the left side surface 34L is parallel to the plane P3. Therefore, the left arm 72 can be disposed close to the battery box 341 in the left-right direction of the vehicle.

  In the electric bicycle 10B, of the pair of side surfaces 34L and 34R, the right side surface 34R is parallel to the plane P4. Therefore, the right arm 74 can be disposed close to the battery box 341 in the left-right direction of the vehicle.

  While the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the spirit thereof.

10 Electric Bicycle 12 Body Frame 14 Swing Arm 20 Rear Wheel 28 Seat Pipe 32 Saddle 34 Battery Box 34L Side

Claims (10)

Pedal,
With saddles,
A vehicle body frame in which the pedal is operably provided and supports the saddle;
A battery box attached to the vehicle body frame and containing a battery;
A rear wheel disposed behind the vehicle body frame;
A swing arm disposed so as to be swingable in a vertical direction of the vehicle with respect to the body frame, and supporting the rear wheel;
A rear suspension connecting the body frame and the swing arm;
Each of the swing arm and the rear suspension is swingably provided around a swing axis extending in the left-right direction of the vehicle,
The battery box is
The center of gravity of the battery box is disposed so as to be located between the front end and the rear end of the saddle in the front-rear direction of the vehicle when viewed from the left-right direction of the vehicle,
At least a part of the side surface of the battery box is formed along a virtual plane perpendicular to the left-right direction of the vehicle, and the swing arm or the rear suspension swings when viewed from the left-right direction of the vehicle. Bicycles arranged to overlap the range. The bicycle according to claim 1,
At least a part of the side surface of the battery box is seen from the left-right direction of the vehicle, and the swing range of the swing arm or the rear suspension between the front end and the rear end of the saddle in the front-rear direction of the vehicle. The bicycle is arranged so as to overlap. The bicycle according to claim 1 or 2,
The bicycle in which each of the battery box and the swing arm is not positioned at the center in the left-right direction of the vehicle in a plan view of the vehicle. The bicycle according to claim 1 or 2,
The bicycle in which either the battery box or the swing arm is located at the center in the left-right direction of the vehicle in a plan view of the vehicle. The bicycle according to any one of claims 1 to 3,
The vehicle body frame includes a seat frame,
The swing arm is disposed in one of the left and right directions of the vehicle with respect to the seat frame in a plan view of the vehicle,
The battery box is a bicycle disposed on the opposite side of the swing arm in the left-right direction of the vehicle with respect to the seat frame in a plan view of the vehicle. The bicycle according to claim 5,
The rear suspension is a bicycle that is disposed on a side opposite to the battery box in a lateral direction of the vehicle with respect to the seat frame in a plan view of the vehicle. The bicycle according to claim 5,
The rear suspension is a bicycle disposed in front of the seat frame in a side view of the vehicle. The bicycle according to claim 1 or 2,
The vehicle body frame includes a seat frame,
The swing arm is
A first swing arm disposed on one side of the vehicle in the left-right direction with respect to the seat frame in plan view of the vehicle;
A second swing arm disposed on the opposite side of the first swing arm in the left-right direction of the vehicle with respect to the seat frame in a plan view of the vehicle;
A connecting arm that is disposed in front of the seat frame and connects the first swing arm and the second swing arm;
The battery box is a bicycle disposed between the first swing arm and the second swing arm in a plan view of the vehicle. The bicycle according to claim 8, wherein
The first swing arm is
A first arm portion extending in the front-rear direction of the vehicle;
A second arm portion extending in the front-rear direction of the vehicle, disposed in front of the first arm portion, and overlapping the battery box in a side view of the vehicle,
The front part of the second arm part is detachably connected to the connection arm,
The rear part of the second arm part is connected to the first arm part so as to be rotatable. The bicycle according to claim 8 or 9, wherein
The battery box is formed with a groove for accommodating at least a part of the seat frame in a state where the battery box is attached to the seat frame.
The battery box is
A front portion located in front of the seat frame in a side view of the vehicle;
And a rear portion located behind the seat frame in a side view of the vehicle.

Images