JP7149928B2 - tilting vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tilting vehicle that turns in a tilted posture.

As a tilting vehicle that turns in a tilting posture, for example, a motorcycle equipped with a frame structure disclosed in Patent Document 1 is known. The frame structure disclosed in Patent Document 1 has an upper frame and a lower frame that are integrally formed of fiber-reinforced resin using carbon fibers. The upper frame and the lower frame are combined such that an upper head pipe provided on the upper frame and a lower head pipe provided on the lower frame are connected.

In the configuration disclosed in Patent Document 1, the frame structure is made of fiber-reinforced resin using carbon fibers. As a result, a lightweight and high-strength frame structure can be obtained.

JP 2007-307944 A

By the way, in the frame structure of the motorcycle disclosed in the above-mentioned Patent Document 1, the weight of the vehicle can be reduced as compared with the case where the frame structure is made of metal. However, there is a demand to further reduce the weight of the vehicle while ensuring the strength of the frame structure.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a configuration for a tilting vehicle that turns in a tilted posture, which can secure the strength of the frame structure and further reduce the weight of the vehicle.

In order to secure the strength of the frame structure and further reduce the weight of the leaning vehicle that turns in an inclined posture, the following methods are conceivable. For example, it is conceivable to use the characteristics of fiber-reinforced resin to adopt a monocoque structure, a semi-monocoque structure, or a structure integrally formed with other articles such as a cover for the frame structure.

However, a tilting vehicle that turns in a tilted attitude has a characteristic of overturning in the left and right directions when the vehicle is stopped. When the leaning vehicle overturns in the left-right direction while stopped, the vehicle body of the leaning vehicle receives a load from the road surface. Therefore, if the frame structure is a monocoque structure or the like made of fiber-reinforced resin, when the vehicle body receives a load from the road surface, the structure of at least a part of the fibers and resin in the fiber-reinforced resin of the frame structure will collapse. Subject to change.

Further, the position at which the vehicle body receives the load from the road surface when the leaning vehicle overturns in the left or right direction in a stopped state differs from vehicle to vehicle depending on the design of the leaning vehicle. Further, the vehicle body receives a different load from the road surface when it overturns, depending on the weight of the leaning vehicle and the contact position with the road surface when the vehicle overturns. As described above, when the frame structure is a monocoque structure made of fiber-reinforced resin, at least part of the fibers and resin in the fiber-reinforced resin of the frame structure may be damaged by contact with the road surface when the leaning vehicle overturns. structure changes. Therefore, it is necessary to consider the design of the leaning vehicle and the like, taking into consideration the weight of the leaning vehicle and the contact position with the road surface at the time of overturning. Thus, the design of leaning vehicles is constrained. Therefore, the number of vehicles that can employ a frame structure made of fiber-reinforced resin is limited.

Therefore, the inventors have studied a technique for improving the degree of freedom in designing a tilting vehicle that turns in a tilted attitude.

First, the inventor paid attention to the load input to the vehicle body when the leaning vehicle overturned in the left-right direction while the vehicle was stopped, and conducted a detailed study. A tilting vehicle tilts leftward or rightward around a grounded tire when overturning in the horizontal direction. When the vehicle body contacts the road surface, a load acts on the vehicle body at the contact portion with the road surface. Therefore, the inventors of the present invention have found that it is easy to specify the position of the contact portion from the structure of the vehicle or the like.

In addition, it was found that a tilting vehicle bounces when the tilting vehicle rolls over in the left or right direction while the vehicle is stopped. The acceleration of the vibrations that occur in the leaning vehicle on bouncing is high in the initial stages of vibration, but eventually decreases. Therefore, the inventors have found that it is preferable to reduce the load applied to the vehicle body when the acceleration is the highest.

Therefore, the inventors have studied the input direction of the load that the vehicle body receives. Specifically, when the frame structure is made of a material containing fiber-reinforced resin, the present inventors have studied by changing the input direction of the load with respect to the lamination direction of the fibers of the fiber-reinforced resin. As a result, it was found that the structure of at least one of the fibers and the resin in the frame structure made of the material containing the fiber-reinforced resin may change when a load is applied in the lamination direction of the fibers. rice field.

Therefore, the present inventors have studied how to reduce the component of the load input in the lamination direction of the fibers of the fiber-reinforced resin constituting the frame structure. As a result of investigations, the present inventors have found that the load input to the frame structure is reduced to I came up with the idea of changing the fiber direction of the fiber reinforced resin that constitutes it. That is, the inventor believes that when the load is input in the direction of the fibers of the frame structure, the force is input in the tensile direction of the fibers of the fiber-reinforced resin constituting the frame structure. I noticed that it is advantageous in terms of the strength of the structure.

Therefore, the present inventors came up with the idea of using a fiber direction load conversion member to convert the load input to the frame structure to the fiber direction of the fiber reinforced resin constituting the frame structure. Further, the present inventor configured the fiber direction load conversion member by a member different from the frame structure, and placed the fiber direction load conversion member in the frame structure while the leaning vehicle was stopped. I came up with the idea of attaching it to the part that comes in contact with the road surface when it falls.

As a result, the tilting vehicle can suppress structural changes in the fiber-reinforced resin of the frame structure due to overturning with another member, so that the degree of freedom in design can be improved compared to the case where a monocoque structure or the like is adopted. can be done. That is, in the frame structure containing fiber-reinforced resin, the strength of the frame structure can be ensured without being restricted by the design of the leaning vehicle.

Therefore, with the above-described configuration, it is possible to obtain a configuration that can achieve further weight reduction by using the fiber-reinforced resin while ensuring the strength of the frame structure.

Based on the results of the studies described above, the inventors came up with the following configuration.

A tilting vehicle according to an embodiment of the present invention is a tilting vehicle that turns in a tilted posture. This tilting vehicle has a vehicle body that tilts leftward when turning leftward and tilts rightward when turning rightward. The vehicle body includes a fiber-reinforced resin that is reinforced with fibers, a frame structure constituting a part of the vehicle body, and a first left mounting portion and a second left mounting portion attached to the left side of the frame structure. a mounting portion positioned between the first left mounting portion and the second left mounting portion in the fiber direction of the fibers contained in the fiber-reinforced resin of the frame structure, and positioned in the left-right direction of the vehicle; a left load bearing portion located to the left of the first left mounting portion and the second left mounting portion, and receiving a load by contacting a road surface when the vehicle body is tilted leftward in a stopped state; and the frame structure. a first left load transmitting portion located between the first left mounting portion and the left load receiving portion in the fiber direction of the fibers contained in the fiber reinforced resin of and the fiber reinforcement of the frame structure a second left load transmitting portion positioned between the second left mounting portion and the left load receiver in the fiber direction of the fibers contained in the resin, wherein the first left mounting portion and the left load receiver and the second left mounting portion are arranged in the order of the first left mounting portion, the left load bearing portion and the second left mounting portion in the fiber direction of the fibers contained in the fiber reinforced resin of the frame structure. A left side fiber direction load conversion member, a first right attachment portion and a second right attachment portion attached to the right side of the frame structure, and the fibers contained in the fiber reinforced resin of the frame structure are arranged side by side. Positioned between the first right mounting portion and the second right mounting portion in the fiber direction of the fiber direction, and positioned to the right of the first right mounting portion and the second right mounting portion in the left-right direction and a right load receiving portion that receives a load by contacting a road surface when the vehicle body inclines to the right while the vehicle is stopped; a first right load transmitting portion positioned between the right mounting portion and the right load receiving portion; a second right load transfer portion positioned between the right load receiver, wherein the first right attachment portion, the right load receiver and the second right attachment portion are connected to the fiber reinforcement of the frame structure; a right lateral fiber direction load conversion member in which the first right attachment portion, the right load receiving portion, and the second right attachment portion are arranged in this order in the fiber direction of the fibers contained in the resin.

As described above, the weight of the frame structure can be reduced by configuring the frame structure to include the fiber-reinforced resin in which the resin is reinforced with fibers. Therefore, the weight of the leaning vehicle can be reduced.

By the way, a tilting vehicle that turns in a tilted posture may overturn in the left-right direction while the vehicle is stopped. When the leaning vehicle overturns while stopped, the frame structure of the leaning vehicle contacts the road surface and receives a load. As described above, the frame structure containing fiber-reinforced resin may change the structure of at least part of the fibers and resin in the fiber-reinforced resin of the frame structure when a load is applied when the leaning vehicle overturns. .

On the other hand, as in the configuration described above, the left side fiber direction load conversion member and the right side fiber direction load conversion member are attached to the left side and the right side of the frame structure, respectively. Thus, when the leaning vehicle overturns in the horizontal direction while stopped, the left lateral fiber direction load converting member or the right lateral fiber direction load converting member receives the load.

Specifically, when the leaning vehicle rolls over to the left in a stopped state, the left side fiber direction load conversion member contacts the road surface or the like. At this time, a load is input to the left load receiving portion of the left lateral fiber direction load conversion member. The left lateral fiber direction load conversion member transmits the load to the first left attachment portion and the second left attachment portion via the first left load transmission portion and the second left load transmission portion, respectively. Here, the first left mounting portion, the left load receiving portion and the second left mounting portion are arranged in the fiber direction of the fibers contained in the fiber reinforced resin of the frame structure. The left load receiving portion and the second left mounting portion are arranged in this order.

Therefore, the left lateral fiber direction load converting member converts the load input to the left load receiving portion into the fiber direction load. The load converted in the fiber direction is input to the frame structure via the first left mounting portion and the second left mounting portion. Thus, the load input to the left lateral fiber direction load conversion member is input to the frame structure as the fiber direction load. The load is input to the frame structure as a force in the tensile direction of the fibers. Therefore, it is possible to suppress a change in the structure of at least part of the fibers and resin in the frame structure.

Similarly, when the leaning vehicle overturns to the right in a stopped state, the right side fiber direction load conversion member contacts the road surface or the like. At this time, a load is input to the right load receiving portion of the right lateral fiber direction load converting member. The right lateral fiber direction load conversion member transmits the load to the first right attachment portion and the second right attachment portion via the first right load transmission portion and the second right load transmission portion, respectively. Here, the first right mounting portion, the right load receiving portion, and the second right mounting portion are arranged in the fiber direction of the fibers contained in the fiber-reinforced resin of the frame structure. The right load receiving portion and the second right mounting portion are arranged in this order.

Therefore, the right lateral fiber direction load converting member converts the load input to the right load receiving portion into the fiber direction load. The load converted in the fiber direction is input to the frame structure through the first right attachment portion and the second right attachment portion. In this way, the load input to the right lateral fiber direction load conversion member is input to the frame structure as the fiber direction load. The load is input to the frame structure as a force in the tensile direction of the fibers. Therefore, it is possible to suppress a change in the structure of at least part of the fibers and resin in the frame structure.

Moreover, since the left side fiber direction load conversion member and the right side fiber direction load conversion member are separate members from the frame structure, the frame structure is designed in consideration of the overturning of the leaning vehicle. No need. Therefore, the degree of freedom in designing the frame structure can be improved.

Therefore, with the above configuration, the strength of the leaning vehicle can be ensured without reducing the degree of freedom in designing the frame structure. Therefore, it is possible to further reduce the weight of the leaning vehicle while ensuring the strength of the leaning vehicle.

A distance between the first left load transmission portion and the frame structure decreases as the distance from the left load receiving portion toward the first left mounting portion increases, and the fibers contained in the fiber-reinforced resin of the frame structure may extend from the left load receiving portion to the first left mounting portion without overlapping the left load receiving portion in the fiber direction. A distance between the second left load transmission section and the frame structure decreases as the distance from the left load receiving section toward the second left mounting section increases, and the fibers contained in the fiber-reinforced resin of the frame structure decrease. may extend from the left load receiving portion to the second left mounting portion without overlapping the left load receiving portion in the fiber direction. A distance between the first right load transmitting portion and the frame structure decreases as the distance from the right load receiving portion toward the first right mounting portion decreases, and the fibers contained in the fiber-reinforced resin of the frame structure may extend from the right load receiving portion to the first right mounting portion without overlapping the right load receiving portion in the fiber direction. A distance between the second right load transmitting portion and the frame structure decreases as the distance from the right load receiving portion toward the second right mounting portion increases, and the fibers contained in the fiber-reinforced resin of the frame structure decrease. may extend from the right load receiving portion to the second right mounting portion without overlapping the right load receiving portion when viewed in the fiber direction of the fiber.

Thus, when the leaning vehicle overturns leftward in a stopped state, when a load is input to the left load receiving portion of the left lateral fiber direction load conversion member, the load is applied to the first left load transmission. and the second left load transmission section, the load is easily converted into a fiber direction load of the fibers contained in the frame structure. The converted load is input as a force in the tensile direction of the fibers to the frame structure through the first left attachment portion and the second left attachment portion.

Similarly, when the leaning vehicle overturns to the right in a stopped state, when a load is input to the right load receiving portion of the right lateral fiber direction load conversion member, the load is applied to the first right load transmission. and the second right load-transmitting part, the load is easily converted into a fiber-direction load of the fibers contained in the frame structure. The converted load is input as a force in the tensile direction of the fibers to the frame structure through the first right attachment portion and the second right attachment portion.

Therefore, with the above configuration, the load input to the left side fiber direction load conversion member or the right side fiber direction load conversion member is easily converted into the fiber direction load, and the converted load is transferred to the frame. The load in the tensile direction of the fibers can be input to the structure. Therefore, it is possible to more reliably suppress changes in the structure of at least part of the fibers and resin in the frame structure.

The left lateral fiber direction load conversion member and the right lateral fiber direction load conversion member may be provided on the frame structure so as to protrude outward from the outer surface of the frame structure. .

As a result, when the leaning vehicle overturns leftward in a stopped state, the left lateral fiber direction load converting member comes into contact with the road surface before the frame structure body. Further, when the leaning vehicle overturns to the right in a stopped state, the right lateral fiber direction load converting member comes into contact with the road surface before the frame structure body.

Therefore, the load received by the vehicle body when the leaning vehicle overturns in the left-right direction is transferred to the fiber direction of the fiber of the frame structure by the left side fiber direction load conversion member or the right side fiber direction load conversion member. It can be converted to load more reliably. Therefore, it is possible to more reliably suppress changes in the structure of at least part of the fibers and resin in the frame structure.

In the frame structure, a plurality of fiber sheets may be laminated in the fiber reinforced resin.

Thereby, in the frame structure, the strength of the fibers in the fiber direction can be further improved. Therefore, when a load is input in the fiber direction of the frame structure via the left side fiber direction load conversion member or the right side fiber direction load conversion member, at least one of the fibers and the resin in the frame structure It is possible to more reliably suppress the change in the structure of the part.

The left lateral fiber direction load conversion member is configured such that a space is formed between the frame structure and the left load receiving portion, the first left load transmission portion, and the second left load transmission portion. It may be attached to a frame structure. The right lateral fiber direction load conversion member is configured such that a space is formed between the frame structure and the right load receiving portion, the first right load transmission portion, and the second right load transmission portion. It may be attached to a frame structure.

Thus, when the leaning vehicle overturns to the left in a stopped state, at least part of the load applied to the left side fiber direction load conversion member in the stacking direction of the fibers of the frame structure is , the space formed between the frame structure and the left load receiving part, the first left load transmitting part and the second left load transmitting part. Moreover, by providing the space between the frame structure and the left lateral fiber direction load conversion member, when a load is input to the left lateral fiber direction load conversion member in the stacking direction, the The left lateral fiber direction load conversion member is easily deformed. Thereby, the load input in the stacking direction can be easily converted into the fiber direction of the fibers of the frame structure by the left side fiber direction load conversion member.

Similarly, when the leaning vehicle overturns to the right in a stopped state, at least part of the load applied to the right lateral fiber direction load conversion member in the stacking direction of the fibers of the frame structure is , the space formed between the frame structure and the right load-receiving part, the first right load-transmitting part and the second right load-transmitting part. Moreover, by providing the space between the frame structure and the right side fiber direction load conversion member, when a load is input to the right side fiber direction load conversion member in the stacking direction, the The right lateral fiber direction load conversion member is easily deformed. Thereby, the load input in the stacking direction can be easily converted into the fiber direction of the fibers of the frame structure by the right side fiber direction load conversion member.

Therefore, the above-described configuration further reduces the load in the stacking direction that is transmitted to the frame structure. Therefore, it is possible to more reliably suppress changes in the structure of at least part of the fibers and resin in the frame structure.

A left load absorbing member may be arranged between the frame structure and the left load receiving portion of the left lateral fiber direction load converting member to absorb a load input to the left load receiving portion. A right load absorbing member may be arranged between the frame structure and the right load receiving portion of the right lateral fiber direction load converting member to absorb a load input to the right load receiving portion.

Thus, when the leaning vehicle overturns leftward in a stopped state, at least part of the load input to the left lateral fiber direction load converting member is absorbed by the left load absorbing member.

Similarly, when the leaning vehicle overturns to the right in a stopped state, at least part of the load input to the right lateral fiber direction load converting member is absorbed by the right load absorbing member.

Therefore, the above configuration further reduces the load transmitted to the frame structure. Therefore, it is possible to more reliably suppress changes in the structure of at least part of the fibers and resin in the frame structure.

The left side fiber direction load conversion member and the right side fiber direction load conversion member may each include a fiber reinforced resin reinforced with fibers.

As a result, the left side fiber direction load conversion member and the right side fiber direction load conversion member that are lightweight and have a certain degree of strength can be obtained. Therefore, the weight of the leaning vehicle can be further reduced.

The first left mounting portion, the first left load transmission portion, the left load receiving portion, the second left load transmission portion, and the second left mounting portion are connected to the first left mounting portion, the first left load transmission portion. , the left load receiving portion, the second left load transmitting portion, and the second left mounting portion, in this order, in the fiber direction of the fiber reinforced resin in the left side fiber direction load converting member. The first right mounting portion, the first right load transmission portion, the right load receiving portion, the second right load transmission portion and the second right mounting portion are connected to the first right mounting portion, the first right load transmission portion. , the right load receiving portion, the second right load transmitting portion, and the second right mounting portion, in this order, in the fiber direction of the fiber reinforced resin in the right lateral fiber direction load converting member.

In the left lateral fiber direction load conversion member, when a load is input to the left load receiving portion, the first left mounting portion and the first left mounting portion and the It is transmitted to the second left mounting portion. As described above, the first left attachment portion, the first left load transmission portion, the left load receiving portion, the second left load transmission portion, and the second left attachment portion are connected to the left lateral fiber direction load conversion member. By arranging in the fiber direction of the fibers, the strength of the left side fiber direction load conversion member can be improved in the load transmission direction. Therefore, it is possible to suppress a change in the structure of the fibers and resin in the left lateral fiber direction load converting member due to the load.

Similarly, in the right lateral fiber direction load conversion member, when a load is input to the right load receiving portion, the first right attachment is performed via the first right load transfer portion and the second right load transfer portion. and the second right mounting portion. As described above, the first right mounting portion, the first right load transmission portion, the right load receiving portion, the second right load transmission portion, and the second right mounting portion are connected to the right lateral fiber direction load conversion member. By arranging in the fiber direction of the fibers, the strength of the right side fiber direction load conversion member can be improved in the load transmission direction. Therefore, it is possible to suppress a change in the structure of the fibers and resin in the right lateral fiber direction load conversion member due to the load.

The first left mounting portion and the second left mounting portion may be fixed to the frame structure by an adhesive. The first right mounting portion and the second right mounting portion may be fixed to the frame structure by an adhesive.

Thereby, the left side fiber direction load conversion member and the right side fiber direction load conversion member can be easily attached to the frame structure without lowering the strength of the frame structure. That is, when the left side fiber direction load conversion member and the right side fiber direction load conversion member are fixed to the frame structure by bolts or the like, it is necessary to form bolt holes or the like in the frame structure. The strength of the structure may be partially reduced. On the other hand, as described above, the frame structure is processed by fixing the left side fiber direction load conversion member and the right side fiber direction load conversion member to the frame structure with an adhesive. Since it is not necessary, the reduction in strength of the frame structure can be suppressed.

The terminology used herein is for the purpose of defining particular embodiments only and is not intended to limit the invention by the terminology.

As used herein, "and/or" includes all combinations of one or more of the associated listed constructs.

As used herein, the use of "including," "comprising," or "having," and variations thereof, refers to the features, steps, elements, components, and/or , may include one or more of the steps, acts, elements, components and/or groups thereof, although specifying the presence of equivalents thereof.

As used herein, "attached," "connected," "coupled," and/or equivalents thereof are used broadly and include "direct and indirect" attachment, It includes both connection and coupling. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but can include direct or indirect connections or couplings.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms defined in commonly used dictionaries are to be construed to have a meaning consistent with their meaning in the context of the relevant art and this disclosure, unless explicitly defined herein. , is not to be interpreted in an idealized or overly formal sense.

In describing the present invention, it is understood that a number of techniques and processes are disclosed. Each of these has individual benefits and can also be used in conjunction with one or more, or possibly all, of the other disclosed techniques.

Therefore, for the sake of clarity, the description of the invention refrains from unnecessarily repeating all possible combinations of the individual steps. However, the specification and claims should be read with the understanding that all such combinations are within the scope of the present invention.

Embodiments of leaning vehicles according to the invention are described herein.

In the following description, numerous specific examples are set forth to provide a thorough understanding of the invention. However, it will be obvious to one skilled in the art that the invention may be practiced without these specific examples.

Accordingly, the following disclosure should be considered illustrative of the invention and is not intended to limit the invention to the specific embodiments illustrated by the following drawings or description.

<Definition of frame structure>
In this specification, the frame structure is a main frame member that causes stress during vehicle running, and includes not only general frames but also stress-enveloping structures and the like.

<Definition of fiber direction>
As used herein, the fiber direction means the longitudinal direction of the fiber. In a fiber sheet formed into a sheet shape using fibers, the longitudinal direction of the fibers contained in the fiber sheet corresponds to the fiber direction. In the case of a sheet-shaped member in which fibers are arranged to intersect, the direction of each intersecting fiber is called the fiber direction.

Application of the present invention is not limited to motorcycles. The present invention may be applied to leaning vehicles other than motorcycles. A leaning vehicle is a vehicle having a body frame that leans to the right of the vehicle when turning to the right and to the left of the vehicle when turning to the left.

ADVANTAGE OF THE INVENTION According to the leaning vehicle which concerns on one Embodiment of this invention, the structure which can achieve further weight reduction while ensuring intensity|strength is obtained.

FIG. 1 is a left side view schematically showing the overall configuration of a vehicle according to Embodiment 1 of the present invention. FIG. 2 is a top view of the vehicle, a cross-sectional view of the left side fiber direction load converting portion, and a cross-sectional view of the right side fiber direction load converting portion. FIG. 3 is a perspective view showing a schematic configuration of the rear structure. FIG. 4 is a sectional view along line IV-IV in FIG. FIG. 5 is a rear view of a vehicle falling to the left. FIG. 6 is a diagram schematically showing changes over time in vibration values when a vehicle rolls over in a stopped state and contacts the road surface. 7 is a cross-sectional view taken along line VII-VII in FIG. 3. FIG. FIG. 8 is a view corresponding to FIG. 1 of a vehicle according to Embodiment 2. FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 8. FIG. FIG. 10 is a view equivalent to FIG. 4 of a left lateral fiber direction load converter of a vehicle according to another embodiment. FIG. 11 is a view equivalent to FIG. 4 of a left lateral fiber direction load converter of a vehicle according to another embodiment.

Embodiments will be described below with reference to the drawings. In each figure, the same parts are denoted by the same reference numerals, and the description of the same parts will not be repeated. Note that the dimensions of the constituent members in each drawing do not faithfully represent the actual dimensions of the constituent members, the dimensional ratios of the respective constituent members, and the like.

Hereinafter, an arrow F in the drawings indicates the forward direction of the vehicle. An arrow RR in the figure indicates the rearward direction of the vehicle. An arrow U in the figure indicates the upward direction of the vehicle. An arrow L in the figure indicates the left direction of the vehicle. An arrow R in the figure indicates the right direction of the vehicle. Further, in the following description, the front, rear, left, and right directions refer to the front, rear, left, and right directions as seen from the driver of the vehicle.

[Embodiment 1]
<Overall composition>
FIG. 1 is a side view showing an outline of the overall configuration of a vehicle 1 (a leaning vehicle) according to Embodiment 1. FIG. A vehicle 1 is, for example, a motorcycle, and includes a vehicle body 2 , front wheels 3 , and rear wheels 4 . The vehicle 1 is an inclined vehicle that turns in an inclined posture. That is, the vehicle 1 leans to the left when turning to the left, and leans to the right when turning to the right.

The vehicle body 2 supports components such as a vehicle body cover 5 , a steering wheel 6 , a seat 7 and a power unit 8 . In this embodiment, the vehicle body 2 includes a frame 10, a rear structure 20 (frame structure), a left lateral fiber direction load conversion member 31, and a right lateral fiber direction load conversion member 41 (see FIG. 2). . The vehicle body 2 is a structure including a frame 10 and a rear structure 20 and supporting each component of the vehicle 1 .

The frame 10 has a head pipe 11 and a main frame 12 . The head pipe 11 is positioned in the front part of the vehicle 1 and rotatably supports a steering shaft (not shown) connected to the steering wheel 6 . The main frame 12 is connected to the head pipe 11 so as to extend from the head pipe 11 toward the rear of the vehicle. The main frame 12 supports the power unit 8 and the like. A part of the frame 10 is covered with the vehicle body cover 5 .

The frame 10 may be made of a metal material, or may be made of a material containing fiber-reinforced resin in which the resin is reinforced with fibers such as carbon.

The rear structure 20 has a so-called stress skin structure in which the loads of the components supported by the rear structure 20 and the forces input to the rear structure 20 are borne by the walls 21 (see FIGS. 2 to 4). . The rear structure 20 constitutes the outer surface of the vehicle body 2 . That is, the rear structure 20 has a function as a structural member that bears the load and force, and a function as a cover member that constitutes part of the outer surface of the vehicle body 2 .

FIG. 2 is a top view of the vehicle, a cross-sectional view of a left lateral fiber direction load conversion member, and a cross-sectional view of a right lateral fiber direction load conversion member, which will be described later. A sectional view of the left side fiber direction load conversion member and a sectional view of the right side fiber direction load conversion member in FIG. 2 are enlarged in FIGS. 4 and 7 . FIG. 3 is a perspective view showing a schematic configuration of the rear structure 20. As shown in FIG. FIG. 4 is a sectional view along line IV-IV in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 3. FIG.

In this embodiment, the rear structure 20 functions as a rear frame of the vehicle 1 and also functions as a rear cover of the vehicle 1 .

The rear structure 20 is made of a material containing carbon fiber reinforced resin in which resin (for example, epoxy resin, vinyl ester, phenol resin, polyamide, polypropylene, polyphenylene sulfide, etc.) is reinforced with carbon fiber. In this embodiment, the carbon fiber includes a plurality of fiber sheets laminated in the thickness direction. The stacking direction of the fiber sheets (fibers) is the thickness direction of the wall portion 21 of the rear structure 20 . The fiber sheet means a member formed into a sheet shape (flat shape) by, for example, knitting or consolidating fibers. Therefore, in the rear structure 20 , the fiber direction of the carbon fibers used for the carbon fiber reinforced resin is the direction orthogonal to the thickness direction of the wall portion 21 of the rear structure 20 . In addition, in the case of the present embodiment, the fiber direction means one of the directions of the fibers forming the fiber sheet. 4 and 7 schematically show the fibers in the wall portion 21 of the rear structure 20 by dashed lines.

As shown in FIG. 3 , the rear structure 20 has a shape elongated in the longitudinal direction of the vehicle 1 . The rear structure 20 has a wall portion 21 surrounding the space 20a so as to form the space 20a inside. The rear structure 20 functions as a structural member and functions as a part of the outer surface of the vehicle body 2 by means of the wall portion 21 . A cutout portion 22 for disposing the seat 7 is provided in the front portion of the rear structure 20 .

As shown in FIGS. 3 and 4, the rear structure 20 has a left side surface 21a at the left end of the vehicle 1 on which a left side fiber direction load conversion member 31, which will be described later, is arranged. In addition, the rear structure 20 has a right side surface 21b on which a right side fiber direction load conversion member 41, which will be described later, is arranged at the right end of the vehicle 1 (see FIGS. 3 and 7). In this embodiment, the left side 21a and the right side 21b are curved surfaces. The left side 21 a and the right side 21 b are part of the wall portion 21 .

As described above, the rear structure 20 of the present embodiment is made of a material containing a carbon fiber reinforced resin in which the resin is reinforced with carbon fibers. At least some structural changes may occur. It should be noted that the change in the structure of the fiber and resin means that the resin is separated from the fiber, or that the resin changes into a state of cracking.

In addition, in this embodiment, the carbon fiber reinforced resin of the rear structure 20 includes a plurality of fiber sheets laminated in the thickness direction. When the vehicle 1 overturns in the left-right direction while stopped, a load is input to the rear structure 20 in the stacking direction of the fiber sheets due to contact with the road surface.

On the other hand, in this embodiment, as shown in FIG. 31 and right side fiber direction load conversion member 41 are attached. That is, on the outer surface of the left side 21a of the rear structure 20, the left side fiber direction load conversion member 31 is provided so as to protrude leftward, and on the outer surface of the right side 21b of the rear structure 20, A right side fiber direction load conversion member 41 is provided so as to protrude rightward. The left side fiber direction load conversion member 31 and the right side fiber direction load conversion member 41 are provided on the outer surface of the rear structure 20 so as to protrude outward. As a result, when the vehicle 1 overturns in the horizontal direction while stopped, the left lateral fiber direction load conversion member 31 or the right lateral fiber direction load conversion member 41 comes into contact with the road surface before the rear structure 20 does. Therefore, it is possible to suppress changes in the structure of the fibers and resin in the carbon fiber reinforced resin that constitutes the rear structure 20 .

In this embodiment, since the left side fiber direction load conversion member 31 and the right side fiber direction load conversion member 41 have the same configuration, only the configuration of the left side fiber direction load conversion member 31 will be described below.

As shown in FIG. 4, the left lateral fiber direction load converting member 31 is a convexly curved plate-like member. The left side fiber direction load conversion member 31 is mounted on the left side 21 a of the rear structure 20 so as to protrude leftward from the vehicle 1 .

The left side fiber direction load conversion member 31 comes into contact with the road surface G when the vehicle 1 rolls leftward while stopped (in the case of FIG. 5). As a result, a load is input to the left lateral fiber direction load converting member 31 . The left side fiber direction load conversion member 31 converts the input load in the fiber direction of the rear structure 20 before the structure of at least part of the fibers and resin in the carbon fiber reinforced resin constituting the rear structure 20 changes. The load is converted into a load and transmitted to the rear structure 20 .

Therefore, when the vehicle 1 is overturned to the left while stopped, the load applied to the rear structure 20 in the stacking direction of the fiber sheets can be reduced by the left side fiber direction load conversion member 31 . That is, by providing the left side fiber direction load conversion member 31 in the rear structure 20, a load that changes the structure of at least a part of the fibers and resin in the carbon fiber reinforced resin constituting the rear structure 20 is input. can be suppressed.

Specifically, the left lateral fiber direction load conversion member 31 includes a first left attachment portion 32, a second left attachment portion 33, a left load receiving portion 34, a first left load transmission portion 35, and a second left load transmission. 36. The first left attachment portion 32 and the second left attachment portion 33 are portions of the left lateral fiber direction load converting member 31 that are fixed onto the left lateral surface 21 a of the rear structure 20 . That is, the first left mounting portion 32 and the second left mounting portion 33 are positioned at the base end portion of the left lateral fiber direction load conversion member 31 projecting to the left of the vehicle 1 .

The first left attachment portion 32 and the second left attachment portion 33 are fixed on the left side surface 21a by, for example, an adhesive. That is, the left lateral fiber direction load conversion member 31 is fixed to the rear structure 20 by, for example, an adhesive. By fixing the left lateral fiber direction load conversion member 31 to the rear structure 20 using an adhesive or the like in this way, there is no need to process the rear structure 20 with bolt holes or the like. can prevent a decrease in strength.

The left load receiving portion 34 is a protruding end of the left lateral fiber direction load conversion member 31 located on the left side of the rear structure 20 . That is, the left load receiving portion 34 is the tip (convex tip) of the left lateral fiber direction load conversion member 31 in the projecting direction (the left direction of the vehicle 1). Therefore, the left load receiving portion 34 is positioned to the left of the first left mounting portion 32 and the second left mounting portion 33 . The left load receiving portion 34 contacts the road surface when the vehicle 1 rolls leftward while stopped. Therefore, a load is input to the left load receiving portion 34 in the direction indicated by the white arrow in FIG. 4 due to contact with the road surface when the vehicle 1 overturns leftward. The direction of the load input to the left load receiving portion 34 is the stacking direction of the fiber sheets of the rear structure 20 .

The first left load transmitting portion 35 is located between the left load receiving portion 34 and the first left mounting portion 32 . The first left load transmission portion 35 is provided such that the distance from the rear structure 20 decreases from the left load receiving portion 34 toward the first left mounting portion 32 . The first left load transmitting portion 35 extends from the left load receiving portion 34 to the first left mounting portion 32 without overlapping the left load receiving portion 34 in the fiber direction of the rear structure 20 . In the present embodiment, the first left load transmitting portion 35 overlaps with the left load receiving portion 34 when viewed from the stacking direction of the fiber sheets of the rear structure 20 (the thickness direction of the wall portion 21 of the rear structure 20). not.

Accordingly, when a load is input to the left load receiving portion 34 from the left side, the load is transmitted to the first left mounting portion 32 by the first left load transmission portion 35 . As described above, since the distance between the first left load transmitting portion 35 and the rear structure 20 decreases from the left load receiving portion 34 toward the first left mounting portion 32, the distance from the first left load transmitting portion 35 to the rear structure 20 decreases. 20 , loads can be transmitted in a direction along the rear structure 20 . In addition, since the first left load transmitting portion 35 extends from the left load receiving portion 34 to the first left mounting portion 32 without overlapping the left load receiving portion 34 in the fiber direction of the rear structure 20, the first left load transmitting portion 35 A load can be efficiently transmitted from the left load receiving portion 34 to the rear structure 20 via the load transmitting portion 35 .

The second left load transmitting portion 36 is positioned between the left load receiving portion 34 and the second left mounting portion 33 . The second left load transmission portion 36 is provided such that the distance from the rear structure 20 decreases from the left load receiving portion 34 toward the second left mounting portion 33 . The second left load transmitting portion 36 extends from the left load receiving portion 34 to the second left mounting portion 33 without overlapping the left load receiving portion 34 in the fiber direction of the rear structure 20 . In the present embodiment, the second left load transmitting portion 36 overlaps with the left load receiving portion 34 when viewed from the stacking direction of the fiber sheets of the rear structure 20 (the thickness direction of the wall portion 21 of the rear structure 20). not.

Accordingly, when a load is input to the left load receiving portion 34 from the left side, the load is transmitted to the second left mounting portion 33 by the second left load transmission portion 36 . As described above, since the distance between the second left load transmitting portion 36 and the rear structure 20 decreases from the left load receiving portion 34 toward the second left mounting portion 33, the distance from the second left load transmitting portion 36 to the rear structure 20 decreases. 20 , loads can be transmitted in a direction along the rear structure 20 . In addition, since the second left load transmitting portion 36 extends from the left load receiving portion 34 to the second left mounting portion 33 without overlapping the left load receiving portion 34 in the fiber direction of the rear structure 20, the second left load transmitting portion 36 A load can be efficiently transmitted from the left load receiving portion 34 to the rear structure 20 via the load transmitting portion 36 .

As described above, the load input from the left side to the left load receiving portion 34 is transmitted to the first left mounting portion 32 via the first left load transmitting portion 35 in the left lateral fiber direction load converting member 31. At the same time, the load is transmitted to the second left mounting portion 33 via the second left load transmission portion 36 . That is, in the left lateral fiber direction load conversion member 31, load transmission paths are formed between the left load receiving portion 34 and the first left mounting portion 32 and the second left mounting portion 33, respectively.

Further, the load input to the left load receiving portion 34 from the left side is transmitted by the first left load transmission portion 35 and the first left mounting portion 32 in a direction perpendicular to the thickness direction of the rear structure 20, that is, the rear structure 20 fibers are converted into fiber direction loads. A load input to the left load receiving portion 34 from the left is transmitted by the second left load transmission portion 36 and the second left mounting portion 33 in a direction perpendicular to the thickness direction of the rear structure 20 , i.e. Converted to a load in the fiber direction.

The load converted as described above is input to the rear structure 20 in the fiber direction (arrow direction in FIG. 4). In other words, the load input to the left lateral fiber direction load conversion member 31 is input to the rear structure 20 in the tensile direction in the fiber direction. Therefore, in the rear structure 20 made of a material containing carbon fiber reinforced resin, since the load is input in the direction of the highest strength, at least part of the fibers and resin in the carbon fiber reinforced resin of the rear structure 20 A change in structure can be suppressed.

The left side fiber direction load conversion member 31 is provided between the left load receiving portion 34, the first left load transmission portion 35, the second left load transmission portion 36, and the left side surface 21a of the rear structure 20. have Accordingly, when a load is input to the left load receiving portion 34, the left lateral fiber direction load conversion member 31 is easily deformed. Due to the deformation of the left side fiber direction load conversion member 31 , part of the load can be absorbed and the load can be easily converted into a load in the fiber direction of the rear structure 20 . Therefore, it is possible to more reliably prevent the load from being transmitted to the rear structure 20 .

As with the rear structure 20, the left side fiber direction load conversion member 31 is made of a material containing carbon fiber reinforced resin in which the resin is reinforced with carbon fibers. That is, the left side fiber direction load conversion member 31 is made of a material containing a carbon fiber reinforced resin in which a resin (for example, epoxy resin, vinyl ester, phenolic resin, polyamide, polypropylene, polyphenylene sulfide, etc.) is reinforced with carbon fiber. ing. In this embodiment, the carbon fiber includes a plurality of fiber sheets laminated in the thickness direction. The lamination direction of the fiber sheets (fibers) is the thickness direction of the left side fiber direction load converting member 31 . The fiber sheet means a member formed into a sheet shape (flat shape) by, for example, knitting or consolidating fibers. Therefore, in the left side fiber direction load conversion member 31 , the fiber direction of the carbon fibers used for the carbon fiber reinforced resin is perpendicular to the thickness direction of the left side fiber direction load conversion member 31 . In addition, in the case of the present embodiment, the fiber direction means one of the directions of the fibers forming the fiber sheet. FIG. 4 schematically shows the fibers in the left side fiber direction load converting member 31 by dashed lines.

As shown in FIG. 4, when viewed in cross section when the left lateral fiber direction load conversion member 31 is cut in the horizontal direction, the first left mounting portion 32, the second left mounting portion 33, the left load receiving portion 34, the first The left load transmitting portion 35 and the second left load transmitting portion 36 are arranged along the fiber direction of the left lateral fiber direction load transforming member 31 such that the first left mounting portion 32 , the first left load transmitting portion 35 , the left load receiving portion 34 , the second left load transmission portion 36 and the second left mounting portion 33 are arranged in this order.

Accordingly, when a load is input from the left side to the left load receiving portion 34 as described above, part of the load is applied to the first left load transmitting portion 35 and the first left mounting portion 32 along the fiber direction. is transmitted, and part of the load is transmitted to the second left load transmission portion 36 and the second left mounting portion 33 . Therefore, when the vehicle 1 is overturned to the left in a stopped state, if a load is input to the left lateral fiber direction load conversion member 31, the direction in which the left lateral fiber direction load conversion member 31 has the highest strength, that is, the fiber The load is transmitted in the tensile direction of the direction. Accordingly, it is possible to suppress the structure of the fibers and resin in the carbon fiber reinforced resin of the left side fiber direction load converting member 31 from being changed by the load.

With the above configuration, the left lateral fiber direction load conversion member 31 converts the load input from the road surface through the left load receiving portion 34 to the rear structure 20 when the vehicle 1 rolls leftward while stopped. It converts the load in the fiber direction and transmits the converted load to the rear structure 20 . Therefore, the load applied to the rear structure 20 in the stacking direction of the fiber sheets of the rear structure 20 can be reduced by the left side fiber direction load conversion member 31 . As a result, when the vehicle 1 rolls over to the left in a stopped state, it is possible to prevent the structure of at least part of the fibers and resin in the carbon fiber reinforced resin of the rear structure 20 from changing.

As shown in FIG. 5, when the vehicle 1 inclines to the left in a stopped state and overturns, the vibration value (vibration acceleration) generated in the vehicle 1 when the vehicle 1 comes into contact with the road surface G is as shown in FIG. fluctuates to That is, as shown in FIG. 6, the vibration value generated in the vehicle 1 when the vehicle 1 comes into contact with the road surface G is large in the initial stage and gradually decreases with the lapse of time. The reason for this is thought to be that the vehicle 1 bounces against the road surface when the vehicle 1 contacts the road surface G. Therefore, the load input to the vehicle 1 due to contact with the road surface G is large at the initial stage of contact.

In the contact between the vehicle 1 and the road surface G as described above, the left lateral fiber direction load conversion member 31 reduces the peak load input to the vehicle 1 . Therefore, the left side fiber direction load conversion member 31 can reduce the load input to the vehicle 1 due to contact with the road surface G when the vehicle 1 rolls over to the left while the vehicle is stopped.

The right lateral fiber direction load conversion member 41 has the same configuration and effect as the left lateral fiber direction load conversion member 31 described above, except that it is provided on the right side of the vehicle 1 with respect to the rear structure 20 . FIG. 7 shows a cross section taken along line VII--VII in FIG. As shown in FIG. 7, the right lateral fiber direction load conversion member 41 includes a first right mounting portion 42, a second right mounting portion 43, a right load receiving portion 44, a first right load transmitting portion 45, and a 2 and a right load transmission portion 46 . The right load bearing portion 44 is positioned to the right of the first right mounting portion 42 and the second right mounting portion 43 . The right side fiber direction load conversion member 41 is provided between the right load receiving portion 44, the first right load transmission portion 45, the second right load transmission portion 46, and the right side surface 21b of the rear structure 20, and the right space portion 47 is provided. have

When the vehicle 1 rolls over to the right in a stopped state, the right load receiving portion 44 of the right side fiber direction load conversion member 41 contacts the road surface. As a result, a load is input to the right load receiving portion 44 in the direction indicated by the white arrow in FIG. 7 (the stacking direction of the fiber sheets of the rear structure 20). The load input to the right load receiving portion 44 is transmitted to the first right mounting portion 42 via the first right load transmission portion 45 and to the second right mounting portion 43 via the second right load transmission portion 46. is transmitted to Therefore, the load applied to the right side fiber direction load conversion member 41 in the stacking direction of the fiber sheets of the rear structure 20 is converted into a load in the fiber direction of the rear structure 20 . Then, the converted load is transmitted to the rear structure 20 in the fiber direction by the first right attachment portion 42 and the second right attachment portion 43 .

Therefore, the load applied to the rear structure 20 in the stacking direction of the fiber sheets of the rear structure 20 can be reduced by the right side fiber direction load conversion member 41 . As a result, when the vehicle 1 rolls over to the right while stopped, it is possible to prevent the structure of at least part of the fibers and resin in the carbon fiber reinforced resin of the rear structure 20 from changing.

As described above, in the configuration of the present embodiment, the weight of the rear structure 20 can be reduced by including the fiber-reinforced resin in which the resin is reinforced by the laminated fibers. Therefore, the weight of the vehicle 1 can be reduced.

A left side fiber direction load conversion member 31 and a right side fiber direction load conversion member 41 are attached to the left side surface 21a and the right side surface 21b of the rear structure 20, respectively. As a result, when the vehicle 1 overturns in the left-right direction while stopped, a load is input to the left lateral fiber direction load converting member 31 or the right lateral fiber direction load converting member 41 .

Specifically, when the vehicle 1 rolls over to the left while stopped, the left lateral fiber direction load conversion member 31 comes into contact with the road surface G. As shown in FIG. At this time, a load is input to the left load receiving portion 34 of the left side fiber direction load conversion member 31 in the stacking direction of the fiber sheets of the rear structure 20 . The left side fiber direction load conversion member 31 converts the load into a load in the fiber direction of the rear structure 20 and transmits the load to the rear structure 20 . As a result, the load applied to the rear structure 20 in the stacking direction can be reduced. Therefore, it is possible to suppress changes in the structure of at least part of the fibers and resin in the carbon fiber reinforced resin of the rear structure 20 .

Similarly, when the vehicle 1 rolls over to the right while stopped, the right side fiber direction load conversion member 41 contacts the road surface or the like. At this time, a load is input to the right load receiving portion 44 of the right side fiber direction load conversion member 41 in the stacking direction of the fiber sheets of the rear structure 20 . The right side fiber direction load converting member 41 converts the load into a load in the fiber direction of the rear structure 20 and transmits the load to the rear structure 20 . As a result, the load applied to the rear structure 20 in the stacking direction can be reduced. Therefore, it is possible to suppress changes in the structure of at least part of the fibers and resin in the carbon fiber reinforced resin of the rear structure 20 .

Further, as described above, by providing the left side fiber direction load conversion member 31 and the right side fiber direction load conversion member 41 on the left and right side surfaces of the rear structure 20, respectively, accessories and Even if an occupant or the like comes into contact with the rear structure 20, the structure of at least a portion of the fibers and resin in the carbon fiber reinforced resin of the rear structure 20 can be suppressed from being changed.

Moreover, since the left side fiber direction load conversion member 31 and the right side fiber direction load conversion member 41 are separate members from the rear structure 20, the strength against overturning of the vehicle 1 is taken into consideration when designing the rear structure 20. you don't have to. Therefore, the degree of freedom in designing the rear structure 20 can be improved.

Therefore, with the above configuration, it is possible to further reduce the weight of the vehicle 1 while ensuring the strength of the vehicle 1 without reducing the degree of freedom in designing the rear structure 20 .

[Embodiment 2]
FIG. 8 shows a left side view of vehicle 101 according to the second embodiment. FIG. 9 shows a cross section of the left lateral fiber direction load conversion member 131 of the vehicle 101 . The left lateral fiber direction load conversion member 131 in the second embodiment is attached to the outer surface of the front structure 120 of the vehicle 101 and has a trapezoidal cross section, which is different from the configuration in the first embodiment. . Therefore, below, the same code|symbol is attached|subjected to the structure similar to Embodiment 1, description is abbreviate|omitted, and only a different part is demonstrated. Although the configuration of the left lateral fiber direction load conversion member 131 will be described below, the right lateral fiber direction load conversion member has the same configuration as the left lateral fiber direction load conversion member 131, as in the first embodiment.

As shown in FIG. 8, the vehicle body 102 of the vehicle 101 includes a front structure 120 (frame structure), a frame 110, a left lateral fiber direction load conversion member 131, and a right lateral fiber direction load conversion member (not shown). including. That is, the vehicle body 102 includes a front structural body 120 and a frame 110 and supports each component of the vehicle 101 .

The front structure 120 has a so-called stress envelope structure in which the load of the components supported by the front structure 120 and the force input to the front structure 120 are borne by the walls 121 (see FIG. 9). The front structure 120 constitutes the outer surface of the vehicle body 102 . That is, the front structure 120 has a function as a structural member that bears the load and force, and a function as a cover member that constitutes part of the outer surface of the vehicle body 102 . Specifically, front structure 120 functions as a main frame of vehicle 101 and also functions as a front cover of vehicle 101 .

The front structure 120 is made of a material containing carbon fiber reinforced resin in which resin (for example, epoxy resin, vinyl ester, phenolic resin, polyamide, polypropylene, polyphenylene sulfide, etc.) is reinforced with carbon fiber. In this embodiment, the carbon fiber includes a plurality of fiber sheets laminated in the thickness direction. The stacking direction of the fiber sheets is the thickness direction of the wall portion 121 of the front structure 120 . The fiber sheet means a member formed into a sheet shape (flat shape) by, for example, knitting or consolidating fibers. Therefore, in the front structure 120 , the fiber direction of the carbon fibers used for the carbon fiber reinforced resin is the direction orthogonal to the thickness direction of the wall portion 121 of the front structure 120 . In addition, in the case of the present embodiment, the fiber direction means one of the directions of the fibers forming the fiber sheet. FIG. 9 schematically shows the fibers in the wall portion 121 of the front structure 120 with dashed lines.

The front portion of the frame 110 is connected to the rear portion of the front structure 120 . Frame 110 extends rearward of vehicle 101 from front structure 120 . The frame 110 may be made of a metal material, or may be made of a material containing fiber-reinforced resin in which resin is reinforced with fibers such as carbon.

In this embodiment, a left lateral fiber direction load conversion member 131 and a right lateral fiber direction load conversion member (illustrated), which are separate members from the front structure 120, are provided on both sides of the vehicle 101 in the left-right direction with respect to the front structure 120. omitted) is installed. In this embodiment, since the left side fiber direction load conversion member 131 and the right side fiber direction load conversion member have the same configuration, only the configuration of the left side fiber direction load conversion member 131 will be described below.

As shown in FIG. 9, the left lateral fiber direction load conversion member 131 includes a first left mounting portion 132, a second left mounting portion 133, a left load receiving portion 134, a first left load transmitting portion 135, and a 2 left load transmission portion 136 . The left load bearing portion 134 has a flat plate shape arranged along the left side surface 121 a of the front structural body 120 when viewed in a cross section taken in the longitudinal direction of the vehicle 101 . The first left load transmission portion 135 and the second left load transmission portion 136 have a flat plate shape extending from the left load receiving portion 134 toward the left side surface 121a. The left load receiving portion 134, the first left load transmission portion 135 and the second left load transmission portion 136 are integrally formed.

The distance between the first left load transmitting portion 135 and the second left load transmitting portion 136 increases from the proximal end connected to the left load receiving portion 134 toward the distal end (toward the left side surface 121a of the front structure 120). It spreads like The tip portions of the first left load transmission portion 135 and the second left load transmission portion 136 are each fixed onto the outer surface of the wall portion 121 of the front structure 120 with an adhesive or the like. That is, the tip portion of the first left load transmission portion 135 constitutes the first left attachment portion 132 , and the tip portion of the second left load transmission portion 136 configures the second left attachment portion 133 .

The first left load transmission portion 135 is configured such that the distance from the front structure 120 decreases from the left load receiving portion 134 toward the first left mounting portion 132 . The first left load transmitting portion 135 extends from the left load receiving portion 134 to the first left mounting portion 132 without overlapping the left load receiving portion 134 in the fiber direction of the front structure 120 . In this embodiment, the first left load transmitting portion 135 does not overlap the left load receiving portion 134 when viewed from the stacking direction of the fiber sheets of the front structural body 120 .

The second left load transmission portion 136 is configured such that the distance from the front structure 120 decreases from the left load receiving portion 134 toward the second left mounting portion 133 . The second left load transmitting portion 136 extends from the left load receiving portion 134 to the second left mounting portion 133 without overlapping the left load receiving portion 134 in the fiber direction of the front structure 120 . In this embodiment, the second left load transmitting portion 136 does not overlap the left load receiving portion 134 when viewed from the stacking direction of the fiber sheets of the front structural body 120 .

With the configuration of the first left load transmission portion 135 and the second left load transmission portion 136 as described above, the load input to the left load receiving portion 134 from the left side is transferred to the first left load transmission portion 135 and the second left load transmission portion 135 . The transfer portion 136 converts the load in the fiber direction of the front structure 120 . The converted load is transmitted in the fiber direction to the front structure 120 via the first left attachment portion 132 and the second left attachment portion 133 .

Next, the load that is input from the left lateral fiber direction load conversion member 131 to the front structural body 120 when the vehicle 101 rolls over to the left in a stopped state will be described.

When the vehicle 101 rolls over to the left while stopped, the left load receiving portion 134 of the left lateral fiber direction load conversion member 131 comes into contact with the road surface G. Therefore, a load is input to the left load receiving portion 134 in the direction indicated by the white arrow in FIG. 9 (the stacking direction of the fiber sheets of the front structure 120).

The load input to the left load receiving portion 134 is transmitted to the first left mounting portion 132 and the second left mounting portion 133 by the first left load transmission portion 135 and the second left load transmission portion 136, respectively. That is, the load input to the left load receiving portion 134 is converted by the first left load transmission portion 135 and the second left load transmission portion 136 into a load in the fiber direction of the front structure 120 . The converted load is transmitted from the first left mounting portion 132 and the second left mounting portion 133 to the front structure 120 as indicated by the arrows in FIG.

The load transmitted from the left side fiber direction load conversion member 131 to the front structure 120 is the load in the fiber direction of the front structure 120 . Said load is therefore applied to the fibers of the front structure 120 in the tensile direction. That is, the load is input to the front structure 120 in the direction in which the strength of the front structure 120 is the highest.

Therefore, it is possible to suppress a change in the structure of at least a part of the fibers and resin in the front structure 120 due to the load input from the left side fiber direction load conversion member 131 .

The left side fiber direction load conversion member 131 is provided between the left load receiving portion 134, the first left load transmission portion 135, the second left load transmission portion 136, and the left side surface 121a of the front structure 120. have As a result, when the above load is input to the left load receiving portion 134, the left lateral fiber direction load conversion member 131 is easily deformed. Due to the deformation of the left lateral fiber direction load conversion member 131 , part of the load can be absorbed and the load can be easily converted into a load in the fiber direction of the front structure 120 . Therefore, the load transmitted to the front structure 120 can be further reduced.

Like the front structure 120, the left side fiber direction load conversion member 131 is made of carbon fiber reinforced resin in which the resin is reinforced with carbon fiber. That is, the left side fiber direction load conversion member 131 is made of a material containing a carbon fiber reinforced resin in which a resin (for example, epoxy resin, vinyl ester, phenolic resin, polyamide, polypropylene, polyphenylene sulfide, etc.) is reinforced with carbon fiber. ing. In this embodiment, the carbon fiber includes a plurality of fiber sheets laminated in the thickness direction. The lamination direction of the fiber sheets (fibers) is the thickness direction of the left side fiber direction load converting member 131 . The fiber sheet means a member formed into a sheet shape (flat shape) by, for example, knitting or consolidating fibers. Therefore, in the left side fiber direction load conversion member 131 , the fiber direction of the carbon fibers used for the carbon fiber reinforced resin is perpendicular to the thickness direction of the left side fiber direction load conversion member 131 . In addition, in the case of the present embodiment, the fiber direction means one of the directions of the fibers forming the fiber sheet. FIG. 9 schematically shows the fibers in the left side fiber direction load conversion member 131 by dashed lines.

As shown in FIG. 9, when viewed in cross section when the left lateral fiber direction load conversion member 131 is cut in the front-rear direction, the first left mounting portion 132, the second left mounting portion 133, the left load receiving portion 134, the first The left load transmitting portion 135 and the second left load transmitting portion 136 are arranged along the fiber direction of the left lateral fiber direction load transforming member 131 such that the first left mounting portion 132, the first left load transmitting portion 135, and the left load receiving portion 134 are arranged. , the second left load transmission portion 136 and the second left mounting portion 133 are arranged in this order.

Accordingly, when a load is input to the left load receiving portion 134 as described above, part of the load is transmitted to the first left load transmitting portion 135 and the first left mounting portion 132 along the fiber direction. At the same time, part of the load is transmitted to the second left load transmission portion 136 and the second left mounting portion 133 . Therefore, when the vehicle 101 is overturned to the left in a stopped state, if a load is input to the left lateral fiber direction load conversion member 131, the direction in which the left lateral fiber direction load conversion member 131 has the highest strength, that is, the fiber direction The load is transmitted in the tensile direction of Thereby, it is possible to suppress the structure of the fibers and resin in the carbon fiber reinforced resin of the left side fiber direction load converting member 131 from being changed by the load.

With the above configuration, the left lateral fiber direction load conversion member 131 converts the load input from the road surface through the left load receiving portion 134 to the front structure 120 when the vehicle 1 rolls leftward while stopped. It converts the load in the fiber direction and transmits the converted load to the front structure 120 . Therefore, the load applied to the front structure 120 in the stacking direction of the fiber sheets of the front structure 120 can be reduced by the left side fiber direction load conversion member 131 . As a result, when the vehicle 101 rolls over to the left in a stopped state, it is possible to prevent the structure of at least part of the fibers and resin in the carbon fiber reinforced resin of the front structure 120 from changing.

Although not particularly shown, a right side fiber direction load conversion member having the same configuration as the left side fiber direction load conversion member 131 is similarly mounted on the outer surface of the right side surface of the front structure 120 . As a result, when the vehicle 101 is overturned to the right in a stopped state, the load input to the right load receiving portion is transferred to the fiber direction of the front structure 120 by the first right load transmitting portion and the second right load transmitting portion. is converted to a load of The converted load is transmitted to the front structure 120 via the first right mounting portion and the second right mounting portion. Therefore, a tensile load is input to the front structure 120 in the fiber direction. Therefore, even when the vehicle 101 rolls over to the right, it is possible to prevent the structure of at least part of the fibers and resin in the front structure 120 from changing.

With the configuration of this embodiment, when the vehicle 101 rolls over in the horizontal direction while stopped, the left side fiber direction load conversion member 131 or the right side fiber direction load conversion member causes the fiber lamination direction to the front structure 120. can reduce the load input to Therefore, it is possible to suppress changes in the structure of at least part of the fibers and resin in the carbon fiber reinforced resin of the front structure 120 .

(Other embodiments)
Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, without being limited to the above-described embodiment, it is possible to modify the above-described embodiment as appropriate without departing from the spirit thereof.

In each of the above embodiments, the left lateral fiber direction load conversion member 31 having a convex cross section is fixed to the left side surface 21 a of the rear structure 20 , and the left lateral fiber direction load converting member 31 having a trapezoidal cross section is attached to the left side surface 121 a of the front structure 120 . A member 131 is fixed. However, a left side fiber direction load converting member having a trapezoidal cross section may be fixed to the left side of the rear structure. A left side fiber direction load converting member having a convex cross section may be fixed to the left side of the front structure. In addition, the cross-sectional shape of the left side fiber direction load conversion member is a shape that can convert the load input in the lamination direction of the fibers of the structure containing the fiber reinforced resin into the load in the fiber direction of the fibers. Any cross-sectional shape such as circular or triangular may be used.

The cross-sectional shape of the right side fiber direction load conversion member is not limited to the left side fiber direction load conversion member, and is similarly applied to the right side fiber direction load conversion member. Any cross-sectional shape may be used as long as the input load can be converted into a load in the fiber direction of the fiber.

In each of the embodiments described above, the left lateral fiber direction load conversion members 31 and 131 and the right lateral fiber direction load conversion member 41 are fixed to the rear structure 20 and the front structure 120 . However, the left side fiber direction load conversion member and the right side fiber direction load conversion member may be attached to other than the rear structure and the front structure. That is, the left side fiber direction load conversion member and the right side fiber direction load conversion member may be attached to the frame structure forming the frame of the vehicle.

As shown in FIG. 10, for example, the left side surface 221a of the rear structure 220 is provided with a concave portion 221b for fixing the first left mounting portion 32 and the second left mounting portion 33 of the left side fiber direction load conversion member 31. may The recessed portion 221b has a contact surface 221c on the left side surface 221a of the rear structure 220 with which the first left mounting portion 32 and the second left mounting portion 33 of the left side fiber direction load converting member 31 contact. The recess 221b may have any cross-sectional shape as long as it can stably hold the first left mounting portion 32 and the second left mounting portion 33 of the left lateral fiber direction load conversion member 31. good.

By providing the recessed portion 221b in the left side surface 221a of the rear structure 220 in this way, the left side fiber direction load conversion member 31 can be fixed to the rear structure 220 more reliably.

In the above-described configuration as well, in the portion where the first left mounting portion 32 and the second left mounting portion 33 contact the contact surface 221c of the recess 221b, the load applied to the left load receiving portion 34 of the left lateral fiber direction load converting member 31 is A load is input from the first left attachment portion 32 and the second left attachment portion 33 to the rear structure 220 as a load in the fiber direction of the rear structure 220 (see arrows in FIG. 10). Therefore, when the vehicle rolls over to the left while stopped, the load applied to the rear structure 220 in the direction in which the fibers are laminated can be reduced. Therefore, it is possible to suppress changes in the structure of at least part of the fibers and resin in the carbon fiber reinforced resin of the rear structure 220 .

Note that the above-described concave portion may be provided in the portion where the left lateral fiber direction load converting member is fixed, or may be provided not only in the rear structure but also in other structures such as the front structure. good.

In each of the above-described embodiments, the left lateral fiber direction load conversion member 31, 131 and the right lateral fiber direction load conversion member 41 respectively have the left space portions 37, 137 or the right space portion 47 therein. However, the left load absorbing member and the right load absorbing member may be arranged inside the left side fiber direction load conversion member and the right side fiber direction load conversion member, respectively. For example, as shown in FIG. 11, inside the left lateral fiber direction load conversion member 31, that is, between the left side surface 21a of the rear structure 20 and the left load receiving portion 34 of the left lateral fiber direction load conversion member 31, a left load is applied. An absorbent member 50 may be arranged. Although not particularly illustrated, similarly, a right load is applied inside the right side fiber direction load conversion member 41, that is, between the right side surface 21b of the rear structure 20 and the right load receiving portion 44 of the right side fiber direction load conversion member 41. An absorbent member may be provided.

The left load absorbing member 50 and the right load absorbing member can absorb the load input to the left side fiber direction load conversion member and the right side fiber direction load conversion member, such as resin such as foamed resin, rubber, and gel material. Any material may be used as long as it is a suitable material.

As a result, when the vehicle overturns in the horizontal direction while stopped, the load input to the left lateral fiber direction load conversion member or the right lateral fiber direction load conversion member due to contact with the road surface (the load applied to the left lateral fiber direction load conversion member The direction of the input load (the direction indicated by the white arrow in FIG. 11) is at least partially absorbed by the left load absorbing member or the right load absorbing member. Therefore, with the above-described configuration, it is possible to further reduce the load that is input to the frame structure when the vehicle overturns in the left-right direction. Therefore, it is possible to further suppress changes in the structure of at least part of the fibers and resin in the carbon fiber reinforced resin of the frame structure due to overturning of the vehicle in the left-right direction.

The load absorbing member may be provided on only one of the left side fiber direction load conversion member and the right side fiber direction load conversion member.

In each of the above-described embodiments, the rear structures 20 and 220, the front structure 120, the left side fiber direction load conversion members 31 and 131, and the right side fiber direction load conversion member 41 are carbon fiber reinforced carbon fiber resin reinforced carbon fibers. It is made of a material containing resin. However, the rear structure, the front structure, the left side fiber direction load conversion member, and the right side fiber direction load conversion member are reinforced with resins other than carbon fiber (for example, aramid fiber, polyethylene fiber, glass fiber, etc.). It may be made of a material containing a fiber reinforced resin. Further, in the above embodiment, the rear structures 20 and 220, the front structure 120, the left side fiber direction load conversion members 31 and 131, and the right side fiber direction load conversion member 41 are made of epoxy resin, vinyl ester, phenol resin, or polyamide. , polypropylene, and polyphenylene sulfide. However, the resin may be any other type of resin as long as it can be reinforced by fibers.

In addition, the rear structure, the front structure, the left side fiber direction load conversion member, and the right side fiber direction load conversion member may contain materials other than fiber reinforced resin, such as metal and resin.

Furthermore, the left side fiber direction load conversion member and the right side fiber direction load conversion member may not contain fiber reinforced resin. In this case, the left side fiber direction load conversion member and the right side fiber direction load conversion member may be made of a material such as resin or metal.

In each of the above embodiments, the carbon fibers used in the carbon fiber reinforced resin may be woven together or may be in a non-woven state. That is, the carbon fibers do not have to be fiber sheets. In each of the above embodiments, a plurality of fiber sheets of carbon fibers are laminated, but this is not the only option, and only one fiber sheet may be used. In this case, the lamination direction in each of the above embodiments corresponds to the thickness direction of the members made of the carbon fiber reinforced resin. Further, the carbon fibers may be continuous fibers having a predetermined length (for example, 1 mm) or more, or may be discontinuous fibers. When the carbon fibers are discontinuous fibers, the left side fiber direction load conversion member and the right side fiber direction load conversion member are arranged so as to transmit the load in the direction of relatively high strength in the structure. It is preferably attached to the body.

In each of the above embodiments, the carbon fiber reinforced resin may be composed of a composite material in which a carbon fiber reinforced resin layer reinforced with carbon fibers and a foamed resin layer containing a foamed synthetic resin are laminated in the thickness direction. . This composite material has a pair of the carbon fiber reinforced resin layers, and is a material in which the foamed resin layer is arranged between the carbon fiber reinforced resin layers. By using the composite material, it is possible to reduce the weight of each member including the carbon fiber reinforced resin and to easily change the thickness of each member as compared with the case where only the carbon fiber reinforced resin layer is used. A resin capable of absorbing vibration may be used as the foamed synthetic resin of the foamed resin layer.

In each of the above embodiments, the left side fiber direction load conversion member 31, 131 and the right side fiber direction load conversion member 41 convert the input load to the fiber direction of the rear structures 20, 220 or the front structure 120. , the converted load is transferred to the rear structure 20 , 220 or the front structure 120 . However, the left side fiber direction load conversion member and the right side fiber direction load conversion member will transfer the input load to the structure unless the structure of some of the fibers and resin in the carbon fiber reinforced resin of the structure is changed. The load may be converted to a load in a direction other than the fiber direction, and the converted load may be transmitted to the structure.

In each of the above embodiments, the vehicle body has a rear structure 20, 220 or a front structure 120 having a stress skin structure. However, the vehicle body may have a frame structure including a main frame and seat rails. In this case, the frame structure is made of a material containing carbon fiber reinforced resin in which the resin is reinforced with carbon fiber. Then, on the outer surface of the frame structure, the left side fiber direction load conversion member or the right side fiber direction load conversion member may be attached to a position that comes into contact when the vehicle rolls over in the left or right direction while the vehicle is stopped.

In each of the above-described embodiments, the left side fiber direction load conversion members 31 and 131 and the right side fiber direction load conversion member 41 are fixed to the rear structures 20 and 220 and the front structure 120 with an adhesive. However, the left side fiber direction load conversion member and the right side fiber direction load conversion member may be fixed to the rear structure and the front structure by a method other than adhesive, such as welding or bolting. Note that only a part of the first left attachment portion, the second left attachment portion, the first right attachment portion, and the second right attachment portion may be fixed to the structure containing the fiber-reinforced resin with an adhesive. .

Reference Signs List 1, 101 vehicle 2, 102 vehicle body 10, 110 frame 20, 220 rear structure (frame structure)
20a Spaces 21, 121 Walls 21a, 121a Left side 21b Right side 31, 131 Left side fiber direction load converting members 32, 132 First left mounting parts 33, 133 Second left mounting parts 34, 134 Left load receiving part 35, 135 First left load transmitting portion 36, 136 First left load transmitting portion 37, 137 Left space portion 41 Right side fiber direction load converting member 42 First right mounting portion 43 Second right mounting portion 44 Right load receiving portion 45 First Right load transmission portion 46 First right load transmission portion 47 Right space portion 50 Left load absorbing member 120 Front structure (frame structure)

Claims (9)

A tilting vehicle that turns in a tilting posture,
Equipped with a body that leans to the left when turning to the left and leans to the right when turning to the right,
The vehicle body
a frame structure comprising a fiber-reinforced resin in which the resin is reinforced with fibers and constituting a part of the vehicle body;
a first left mounting portion and a second left mounting portion mounted on the left side surface of the frame structure;
Positioned between the first left mounting portion and the second left mounting portion in the fiber direction of the fibers contained in the fiber reinforced resin of the frame structure, and the first left mounting portion in the left-right direction of the vehicle. a left load receiving portion located to the left of the mounting portion and the second left mounting portion, and receiving a load by coming into contact with a road surface when the vehicle body is tilted leftward in a stopped state;
a first left load transmitting portion located between the first left mounting portion and the left load receiving portion in the fiber direction of the fibers contained in the fiber reinforced resin of the frame structure;
a second left load transmitting portion located between the second left mounting portion and the left load receiving portion in the fiber direction of the fibers contained in the fiber reinforced resin of the frame structure;
The first left mounting portion, the left load receiving portion, and the second left mounting portion are arranged in the fiber direction of the fibers contained in the fiber-reinforced resin of the frame structure so that the first left mounting portion, the left load bearing portion, and the left load receiving portion are arranged in a fiber direction. arranged in order of the receiving portion and the second left mounting portion;
a left lateral fiber direction load converting member;
a first right attachment portion and a second right attachment portion attached to the right side surface of the frame structure;
positioned between the first right mounting portion and the second right mounting portion in the fiber direction of the fibers contained in the fiber-reinforced resin of the frame structure, and the first right mounting portion in the left-right direction; and the second right mounting portion, the right load receiving portion contacting the road surface and receiving a load when the vehicle body inclines to the right while the vehicle is stopped;
a first right load transmitting portion positioned between the first right mounting portion and the right load receiving portion in the fiber direction of the fibers contained in the fiber-reinforced resin of the frame structure;
a second right load transmitting portion located between the second right mounting portion and the right load receiving portion in the fiber direction of the fibers contained in the fiber reinforced resin of the frame structure;
The first right mounting portion, the right load receiving portion, and the second right mounting portion are arranged in the fiber direction of the fibers contained in the fiber-reinforced resin of the frame structure so that the first right mounting portion, the right load bearing portion, and the right load receiving portion are arranged in a fiber direction. arranged in order of the receiving portion and the second right mounting portion;
a right lateral fiber direction load conversion member;
A tilting vehicle. A leaning vehicle according to claim 1, wherein
A distance between the first left load transmission portion and the frame structure decreases as the distance from the left load receiving portion toward the first left mounting portion increases, and the fibers contained in the fiber-reinforced resin of the frame structure extending from the left load receiving portion to the first left mounting portion without overlapping the left load receiving portion in the fiber direction of the
A distance between the second left load transmission section and the frame structure decreases as the distance from the left load receiving section toward the second left mounting section increases, and the fibers contained in the fiber-reinforced resin of the frame structure decrease. extending from the left load receiving portion to the second left mounting portion without overlapping the left load receiving portion in the fiber direction of the
A distance between the first right load transmitting portion and the frame structure decreases as the distance from the right load receiving portion toward the first right mounting portion decreases, and the fibers contained in the fiber-reinforced resin of the frame structure extending from the right load receiving portion to the first right mounting portion without overlapping the right load receiving portion in the fiber direction of the
A distance between the second right load transmitting portion and the frame structure decreases as the distance from the right load receiving portion toward the second right mounting portion increases, and the fibers contained in the fiber-reinforced resin of the frame structure decrease. extending from said right load receiver to said second right mounting portion without overlapping said right load receiver in said fiber direction of said vehicle. A leaning vehicle according to claim 1 or 2,
The left side fiber direction load conversion member and the right side fiber direction load conversion member are each provided on the outer surface of the frame structure so as to protrude outward from the frame structure. vehicle. A leaning vehicle according to any one of claims 1 to 3,
The leaning vehicle, wherein in the frame structure, a plurality of fiber sheets are laminated in the fiber reinforced resin. A leaning vehicle according to any one of claims 1 to 4,
The left lateral fiber direction load conversion member is configured such that a space is formed between the frame structure and the left load receiving portion, the first left load transmission portion, and the second left load transmission portion. attached to the frame structure,
The right lateral fiber direction load conversion member is configured such that a space is formed between the frame structure and the right load receiving portion, the first right load transmission portion, and the second right load transmission portion. A leaning vehicle attached to a frame structure. A leaning vehicle according to any one of claims 1 to 4,
A left load absorbing member is arranged between the frame structure and the left load receiving portion of the left lateral fiber direction load converting member to absorb a load input to the left load receiving portion,
A right load absorbing member for absorbing a load input to the right load receiving portion is arranged between the frame structure and the right load receiving portion of the right lateral fiber direction load converting member. vehicle. A leaning vehicle according to any one of claims 1 to 6,
The leaning vehicle, wherein the left lateral fiber direction load conversion member and the right lateral fiber direction load conversion member each include a fiber reinforced resin reinforced with fibers. A leaning vehicle according to claim 7,
The first left mounting portion, the first left load transmission portion, the left load receiving portion, the second left load transmission portion, and the second left mounting portion are connected to the first left mounting portion, the first left load transmission portion. section, the left load receiving section, the second left load transmission section, and the second left mounting section are arranged in the order of the fiber direction of the fiber reinforced resin in the left side fiber direction load conversion member ,
The first right mounting portion, the first right load transmission portion, the right load receiving portion, the second right load transmission portion and the second right mounting portion are connected to the first right mounting portion, the first right load transmission portion. section, the right load receiving section, the second right load transmission section, and the second right mounting section, in this order, arranged side by side in the fiber direction of the fiber reinforced resin in the right side fiber direction load conversion member , tilting vehicle. A leaning vehicle according to any one of claims 1 to 8,
the first left mounting portion and the second left mounting portion are fixed to the frame structure by an adhesive;
The leaning vehicle, wherein the first right mounting portion and the second right mounting portion are secured to the frame structure by an adhesive.

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