Saddle riding type vehicle

Abstract

To reduce the weight of a vehicle body while securing sufficient rigidity of a vehicle body frame.SOLUTION: A saddle-ride type vehicle includes a down frame (12) extending downward from a head pipe (11) at a front portion of a vehicle body, a pair of side frames (13) connected to a lower portion of the down frame, and a battery case (31) installed inside the pair of side frames. A pair of side frames extend rearward from the down frame and rise obliquely rearward in front of the battery case. A pivot bracket (41) is provided in the middle of the pair of side frames in the extending direction, and the swing arm is supported by the pivot bracket. A suspension bracket (45) is provided at a rear portion of the pair of side frames, and a rear suspension is supported by the suspension bracket. The pair of side frames are connected via the battery case.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a saddle-ride type vehicle. [Background technology]

[0002] In recent years, electric straddle-type vehicles that run on electricity have been developed. A known example of this type of straddle-type vehicle is a scooter-type vehicle in which a battery case is installed below the seat (see, for example, Patent Document 1). In the straddle-type vehicle described in Patent Document 1, a down frame extends downward from a head pipe, and a pair of left and right side frames are connected to the lower part of the down frame. The pair of side frames pass beside the battery case and then rise rearward toward the seat. The pair of side frames are connected by multiple bridges to increase rigidity. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2012 / 043562 Summary of the Invention [Problem to be solved by the invention]

[0004] In the saddle-type vehicle described in Patent Document 1, the pair of side frames are bent sharply behind the battery case, which increases the overall length of the pair of side frames. This increases the length of the pair of side frames and the weight of the vehicle because the pair of side frames are connected by multiple bridges.

[0005] The present invention has been made in view of the above points, and has as its object to provide a saddle-ride type vehicle that can reduce the weight of the vehicle body while ensuring sufficient rigidity of the body frame. [Means for solving the problem]

[0006] One aspect of the present invention provides a saddle-type vehicle comprising a down frame extending downward from a head pipe at the front of the vehicle body, a pair of side frames connected to the lower part of the down frame, and a battery case installed inside the pair of side frames, wherein the pair of side frames extend rearward from the down frame and rise diagonally rearward in front of the battery case, pivot brackets are provided midway in the extension direction of the pair of side frames, a swing arm is supported by the pivot brackets, suspension brackets are provided at the rear of the pair of side frames, a rear suspension is supported by the suspension brackets, and the pair of side frames are connected via the battery case, thereby solving the above-mentioned problem. [Effects of the Invention]

[0007] In one aspect of the saddle-ride type vehicle of the present invention, a pair of side frames begin to rise in front of the battery case and extend diagonally rearward, passing on both sides of the battery case. The pair of side frames, which have a short frame length, connect the lower part of the down frame, the pivot bracket, and the suspension bracket. Furthermore, connecting the pair of side frames by the battery case increases the rigidity of the body frame without providing multiple bridges. By shortening the frame length and eliminating the need for multiple bridges, it is possible to reduce the weight of the vehicle while ensuring sufficient rigidity of the body frame. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a left side view of a saddle-ride type vehicle according to an embodiment of the present invention; [Figure 2] FIG. 2 is a left side view of the rear part of the vehicle body of the present embodiment. [Figure 3] FIG. 3 is a longitudinal cross-sectional view of the rear part of the vehicle body of FIG. 2 taken along the center line. [Figure 4] FIG. 3 is a cross-sectional view of the rear part of the vehicle body of FIG. 2 taken along line AA. [Figure 5] FIG. 10 is a left side view of the rear part of the vehicle body of the comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0009] In one aspect of the saddle-ride type vehicle of the present invention, a down frame extends downward from a head pipe at the front of the vehicle body, a pair of side frames are connected to the lower part of the down frame, and a battery case is installed inside the pair of side frames. The pair of side frames extend rearward from the down frame, and the pair of side frames begin to rise diagonally rearward in front of the battery case, passing on both sides of the battery case and extending diagonally rearward. Pivot brackets are provided midway along the extension direction of the pair of side frames, and suspension brackets are provided at the rear parts of the pair of side frames. A swing arm is supported on the pivot bracket, and a rear suspension is supported on the suspension bracket. The pair of side frames, which have a short frame length, connect the lower part of the down frame, the pivot bracket, and the suspension bracket. Furthermore, the pair of side frames are connected via the battery case, thereby increasing the rigidity of the vehicle frame without providing multiple bridges. By shortening the frame length and eliminating the need for multiple bridges, it is possible to reduce the weight of the vehicle while ensuring sufficient rigidity of the body frame. [Example]

[0010] The saddle-riding type vehicle of this embodiment will be described below with reference to the accompanying drawings. Fig. 1 is a left side view of the saddle-riding type vehicle of this embodiment. In the following drawings, arrow Fr indicates the front of the vehicle, arrow Re indicates the rear of the vehicle, arrow L indicates the left side of the vehicle, and arrow R indicates the right side of the vehicle.

[0011] As shown in Fig. 1, a saddle-ride type vehicle 1 is configured by attaching various covers to an underbone-type body frame 10 as the exterior body of the vehicle. A head pipe 11 is provided at the front of the body frame 10, and a down frame 12 extends diagonally downward and rearward from the head pipe 11. A pair of left and right side frames 13 are connected to the lower part of the down frame 12, and the pair of side frames 13 extend rearward and then rise diagonally rearward. A fixed battery case 31 and a storage box 37 are mounted inside the pair of side frames 13, and a seat (not shown) is mounted above the battery case 31 and the storage box 37.

[0012] A front fork 21 is steerably supported on the head pipe 11 via a steering shaft (not shown). A handlebar 22 is provided on the upper part of the steering shaft, and a front wheel 23 is rotatably supported on the lower part of the front fork 21. A swing arm 25 is supported on pivot brackets 41 of the pair of side frames 13, and a rear wheel 26 is rotatably supported on the rear part of the swing arm 25. The rear parts of the pair of side frames 13 and the rear part of the swing arm 25 are connected via a rear suspension 28, and the rear suspension 28 expands and contracts as the swing arm 25 swings, absorbing unevenness in the road surface.

[0013] In typical electric straddle-type vehicles, the energy density of the battery that serves as the energy source is lower than that of gasoline, making the vehicle heavier and resulting in a shorter cruising range than gasoline-powered vehicles, and therefore weight reduction is required. Using a battery case instead of a bridge connecting a pair of side frames ensures rigidity while reducing weight, but considering the support positions for the swing arm and rear suspension, the overall length of the side frames increases, resulting in increased weight. Therefore, in this embodiment, the pair of side frames are connected by a battery case, and the side frames are raised diagonally rearward in front of the battery case, thereby shortening the frame length.

[0014] The rear structure of the saddle-ride type vehicle will be described below with reference to Fig. 2. Fig. 2 is a left side view of the rear of the vehicle body of this embodiment. Note that Fig. 2 shows the saddle-ride type vehicle without the seat, cover, floor board, rear suspension, etc.

[0015] As shown in Fig. 2, at the rear of the body of the saddle-ride type vehicle 1, a pair of left and right side frames 13 extend obliquely upward and rearward from the lower part of the down frame 12 (see Fig. 1). A battery case 31 and a storage box 37 are installed inside the pair of side frames 13, lined up front and rear. In this case, the pair of side frames 13 rise obliquely rearward in front of the battery case 31, pass along both sides of the battery case 31 and the storage box 37, and extend to the rear of the storage box 37. In this way, the pair of side frames 13 diagonally cross the sides of the battery case 31 and the storage box 37 at a gentle slope.

[0016] A pivot bracket 41 is provided midway along the extension direction of the pair of side frames 13, and a suspension bracket 45 is provided at the rear of the pair of side frames 13. The swing arm 25 is swingably supported by the pivot bracket 41, and the upper end of the rear suspension 28 (see FIG. 1) is supported by the suspension bracket 45. In this way, the pair of side frames 13 extend from the front to the rear of the vehicle so as to connect the lower part of the down frame 12, the pivot bracket 41, and the suspension bracket 45. The pair of side frames 13 are also connected via the battery case 31.

[0017] The battery case 31 is formed in a generally rectangular shape when viewed from the side, and accommodates a plurality of cells (single batteries) inside the battery case 31. When viewed from the side, the battery case 31 is tilted forward so that the lower corners on the front side of the case are the lowest, the upper corners on the rear side of the case are the highest, the upper corners on the front side of the case are the most forward, and the lower corners on the rear side of the case are the most rearward. Front fixing portions 32 (see FIG. 3) and rear fixing portions 33 (see FIG. 3) are provided at the front and rear of the battery case 31. The front fixing portions 32 and rear fixing portions 33 are fixed to a pair of side frames 13, thereby increasing the rigidity of the pair of side frames 13.

[0018] The pair of side frames 13 are curved and rise up, and the rear of this curved portion 17 forms a linearly inclined inclined portion 18. A front bracket 34 protrudes upward from the curved portion 17 of the pair of side frames 13, and a rear bracket 35 protrudes downward from the middle position of the inclined portion 18. A front fixing portion 32 of the battery case 31 is fixed to the front bracket 34, and a rear fixing portion 33 of the battery case 31 is fixed to the rear bracket 35. The rear fixing portion 33 is fixed to the pair of side frames 13 at a position higher than the front fixing portion 32, and the pair of side frames 13 support the battery case 31 from below in a forward-leaning position.

[0019] A flange 38 is provided around the opening on the upper surface of the storage box 37, and the lower surface of the storage box 37 is inclined to avoid interference with the rear wheel 26. The front side of the flange 38 covers the rear side of the upper surface of the battery case 31, and the rear side of the flange 38 covers the rear ends of the pair of side frames 13. Bridge brackets 29 are provided on the rear ends of the pair of side frames 13, and the support surfaces of the bridge brackets 29 are located at approximately the same height as the upper corners of the rear side of the battery case 31. The front side of the flange 38 is fixed to the upper corners of the rear side of the battery case 31, and the rear side of the flange 38 is fixed to the bridge brackets 29 of the pair of side frames 13.

[0020] The reinforcing structure of the side frame will be described with reference to Figures 2 to 4. Figure 3 is a longitudinal cross-sectional view of the rear body of Figure 2 taken along the center line. Figure 4 is a transverse cross-sectional view of the rear body of Figure 2 taken along line AA. The storage box and swing arm are omitted from Figures 3 and 4.

[0021] 2 and 3, a front bracket 34 projects upward from the curved portions 17 of the pair of side frames 13, and a rear bracket 35 projects downward from the inclined portions 18 of the pair of side frames 13. A front fixing portion 32 of the battery case 31 is fixed to the front bracket 34, and the curved portions 17 of the pair of side frames 13 are connected via the front fixing portion 32. A rear fixing portion 33 of the battery case 31 is fixed to the rear bracket 35, and the inclined portions 18 of the pair of side frames 13 are connected via the rear fixing portion 33. The rigidity of the curved portions 17 is increased by the front bracket 34 and the front fixing portion 32, and the rigidity of the inclined portions 18 is increased by the rear bracket 35 and the rear fixing portion 33.

[0022] The front end of the front bracket 34 extends to near the front end of the curved portion 17, and the rear end of the front bracket 34 extends to near the rear end of the curved portion 17. The front brackets 34 are provided on the pair of side frames 13 in the same range as the curved portion 17, increasing the rigidity of the curved portion 17. Because the front fixing portion 32 is fixed to the front bracket 34, the gravity of the battery case 31 acts on the curved portion 17 of the pair of side frames 13 via the front bracket 34. By positioning the front fixing portion 32 at the intermediate position of the front bracket 34 in the fore-and-aft direction, the gravity of the battery case 31 is distributed over a wide range from the front end to the rear end of the curved portion 17, suppressing stress concentration.

[0023] A pivot bracket 41 is provided on the curved portions 17 of the pair of side frames 13. The pivot bracket 41 protrudes downward from the curved portions 17, and the pivot bracket 41 and the front bracket 34 are located on opposite sides of the side frame 13. The curved portions 17 are positioned at the lowest point on the side frame 13, and the pivot bracket 41 is positioned below this curved portion 17. Because the swing arm 25 (see FIG. 2) is supported at a low position below the curved portions 17 of the pair of side frames 13, sufficient space is secured above the side frame 13 to accommodate the battery case 31.

[0024] The front end of the pivot bracket 41 extends further forward than the curved portion 17, and the rear end of the pivot bracket 41 extends further rearward than the curved portion 17. The pivot brackets 41 are provided on the pair of side frames 13 over an area wider than the curved portion 17, further increasing the rigidity of the curved portion 17. The swing arm 25 is supported by the swing arm pivot 42 of the pivot bracket 41, so that an upward thrust force from the swing arm 25 acts on the curved portion 17 of the pair of side frames 13 via the pivot bracket 41. The rigidity of the curved portion 17 is increased by the front bracket 34, pivot bracket 41, and front fixing portion 32, and deformation of the curved portion 17 due to the upward thrust force is suppressed.

[0025] The rear bracket 35 is located midway between the inclined portions 18 of the pair of side frames 13. Although the inclined portions 18 of the pair of side frames 13 have low rigidity, by providing the rear bracket 35 midway between the inclined portions 18, the rigidity of the inclined portions 18 is increased by the rear bracket 35 and the rear fixing portion 33, thereby suppressing deformation of the inclined portions 18. The battery case 31 is supported by the pair of side frames 13 in a forward-leaning position by the front bracket 34 and the rear bracket 35. At this time, the lower surface of the battery case 31 is inclined along the pair of side frames 13. The overhang lengths of the front bracket 34 and the rear bracket 35 are short, thereby increasing the rigidity of the front bracket 34 and the rear bracket 35.

[0026] The bottom surface of the battery case 31 is inclined more gently than the pair of side frames 13. Even when the battery case 31 is tilted forward, the length from the upper front corner to the lower rear corner of the case and the height from the upper rear corner to the lower front corner of the case are limited. That is, the amount by which the upper front corner of the case protrudes forward is limited, and the amount by which the upper rear corner of the case protrudes upward is also limited. This makes it easier to ensure storage space for the battery case 31 inside the pair of side frames 13. The inclination of the battery case 31 is adjusted to an angle that does not interfere with the swing arm 25 during swinging.

[0027] The front fixing portion 32 is provided at the front end of the underside of the battery case 31, and the rear fixing portion 33 is provided at the rear end of the underside of the battery case 31. By providing the front fixing portion 32 and the rear fixing portion 33 at the corners of the highly rigid battery case 31, the rigidity of the pair of side frames 13 is increased. In a side view, the front fixing portion 32 protrudes from the front end of the underside of the battery case 31, and the rear fixing portion 33 protrudes from the rear end of the underside of the battery case 31. Because the front fixing portion 32 and the rear fixing portion 33 are located outside the case, multiple cells can be efficiently installed inside the case. The fixing pitch in the front-to-rear direction of the front fixing portion 32 and the rear fixing portion 33 is large, thereby increasing the support rigidity.

[0028] As shown in Figures 2 and 4, the front fixing portion 32 and the rear fixing portion 33 protrude from both side surfaces of the battery case 31 when viewed from the rear. When the vehicle rolls over, impact is less likely to be transmitted to the battery case 31, protecting the cells inside the battery case 31. The front fixing portion 32 and the rear fixing portion 33 are formed in a columnar shape that is long in the vehicle width direction. The front fixing portion 32 and the rear fixing portion 33 function as a bridge, and by connecting the pair of side frames 13 with the front fixing portion 32 and the rear fixing portion 33, the rigidity of the body frame can be increased. Eliminating the need for a bridge between the pair of side frames 13 contributes to reducing the weight of the vehicle.

[0029] 2 and 3, the pair of side frames 13 extend rearward from the lower part of the down frame 12 toward the swing arm pivot 42. The pair of side frames 13 curve and rise forward of the front fixing part 32, cross the middle of the lower surface and the lower rear side of the battery case 31, and extend obliquely rearward toward a support position 46 for the rear suspension 28 (see FIG. 1). The curved parts 17 of the pair of side frames 13 are positioned between the swing arm pivot 42 and the front fixing part 32, and the inclined parts 18 of the pair of side frames 13 are positioned above the rear bracket 35. In addition, the rear parts of the pair of side frames 13 are positioned above the support position 46 for the rear suspension 28.

[0030] In this way, the pair of side frames 13 extend through the front end position P1 of the lower part of the down frame 12, the curved position P2 near the swing arm pivot 42, and the rear end position P3 near the support position 46 of the rear suspension 28. In this case, by positioning the rising positions of the pair of side frames 13 forward of the front fixing part 32, the side frames 13 are formed short from the front end position P1 toward the rear end position P3 via the curved position P2. The side frames 13, which have a short frame length, connect the lower part of the down frame 12, the pivot bracket 41, the front bracket 34, the rear bracket 35, and the suspension bracket 45, thereby reducing the weight of the vehicle.

[0031] As described above, according to the saddle-type vehicle 1 of this embodiment, the pair of side frames 13 begin to rise in front of the battery case 31 and extend diagonally rearward, passing on both sides of the battery case 31. The pair of side frames 13, which have a short frame length, connect the lower part of the down frame 12, the pivot bracket 41, and the suspension bracket 45. Furthermore, connecting the pair of side frames 13 by the battery case 31 increases the rigidity of the body frame 10 without providing multiple bridges. By shortening the frame length and eliminating the need for multiple bridges, it is possible to reduce the weight of the vehicle while ensuring sufficient rigidity of the body frame 10.

[0032] In this embodiment, the rear brackets protrude downward from the side frames, but as shown in a modified example in Fig. 5, the rear brackets 51 may protrude upward from the side frames 52. In this case, the rear fixing parts 53 are provided on the rear surface of the battery case 54.

[0033] Furthermore, in this embodiment, the battery case is formed in a generally rectangular shape when viewed from the side, but the shape of the battery case is not particularly limited as long as the battery case can be installed between a pair of side frames.

[0034] Furthermore, in this embodiment, the storage box is provided behind the battery case, but a component other than the storage box may be provided behind the battery case.

[0035] In addition, in this embodiment, the front fixing portion of the battery case is fixed to the side frame via a front flange, but the front fixing portion of the battery case may be fixed directly to the side frame. Similarly, the rear fixing portion of the battery case is fixed to the side frame via a rear flange, but the rear fixing portion of the battery case may be fixed directly to the side frame.

[0036] In addition, in this embodiment, the front fixing portion protrudes from the front end of the underside of the battery case, and the rear fixing portion protrudes from the rear end of the underside of the battery case, but the front fixing portion and the rear fixing portion may be located at any position on the battery case.

[0037] Furthermore, in this embodiment, the battery case is supported by the pair of side frames in a forward tilted position, but the battery case may also be supported by the pair of side frames in an upright position.

[0038] Furthermore, the vehicle body frame of this embodiment is not limited to the above-mentioned saddle-ride type vehicle, and may be used in other saddle-ride type vehicles. Note that the saddle-ride type vehicle is not limited to all vehicles in which the rider sits astride on the seat, but also includes scooter-type vehicles in which the rider does not sit astride on the seat.

[0039] As described above, the first aspect of the vehicle includes a down frame (12) extending downward from a head pipe (11) at the front of the vehicle body, a pair of side frames (13) connected to the lower part of the down frame, and a battery case (31) installed inside the pair of side frames. The pair of side frames extend rearward from the down frame and rise obliquely rearward in front of the battery case. Pivot brackets (41) are provided midway along the extension direction of the pair of side frames, and a swing arm (25) is supported by the pivot brackets. Suspension brackets (45) are provided at the rear of the pair of side frames, and a rear suspension (28) is supported by the suspension brackets. The pair of side frames are connected via the battery case. According to this configuration, the pair of side frames begin to rise in front of the battery case and extend obliquely rearward, passing on both sides of the battery case. The lower part of the down frame, the pivot brackets, and the suspension brackets are connected by the pair of side frames, which have a short frame length. Furthermore, by connecting the pair of side frames by the battery case, the rigidity of the vehicle body frame is increased without the need for multiple bridges. By shortening the frame length and eliminating the need for multiple bridges, it is possible to reduce the weight of the vehicle while ensuring sufficient rigidity of the body frame.

[0040] In the second aspect, in the first aspect, front fixing portions (32) and rear fixing portions (33) are provided at the front and rear of the battery case, and the front fixing portions and rear fixing portions are fixed to a pair of side frames, and the pair of side frames start to rise forward of the front fixing portions. With this configuration, the front fixing portions and rear fixing portions increase the rigidity of the pair of side frames. By positioning the rising positions of the pair of side frames forward of the front fixing portions, the frame length is shortened.

[0041] In the third aspect, the pair of side frames in the second aspect are curved and stand up, and the curved portions (17) of the pair of side frames are connected via the front fixing portion. With this configuration, the rigidity of the curved portions of the pair of side frames is increased by the front fixing portion.

[0042] In the fourth aspect, in the third aspect, front brackets (34) extend upward from the curved portions of the pair of side frames, and front fixing portions are fixed to the front brackets, and rear brackets (35) extend downward from the rear inclined portions of the curved portions of the pair of side frames, and rear fixing portions are fixed to the rear brackets. With this configuration, the rigidity of the curved portions of the pair of side frames is increased by the front brackets and front fixing portions, and the rigidity of the inclined portions of the pair of side frames is increased by the rear brackets and rear fixing portions.

[0043] In a fifth aspect, in the fourth aspect, the pivot bracket is provided at the curved portions of the pair of side frames. With this configuration, the swing arm is supported by the curved portions of the pair of side frames via the pivot bracket. Therefore, a thrust force from the swing arm acts on the curved portions of the pair of side frames. The front bracket, pivot bracket, and front fixing portion increase the rigidity of the curved portions, thereby suppressing deformation of the curved portions due to the thrust force.

[0044] In a sixth aspect, in the fourth or fifth aspect, the pivot bracket is located on the opposite side of the front bracket, sandwiching the curved portions of the pair of side frames. With this configuration, the pivot bracket can further increase the rigidity of the curved portions of the pair of side frames. In addition, the curved portions of the side frames are positioned at the lowest point, and the pivot bracket is positioned below this curved portion. Because the swing arm is supported at a low position below the curved portions of the side frames, sufficient space can be secured above the side frames to accommodate the battery case.

[0045] In a seventh aspect, in any one of the fourth to sixth aspects, the rear bracket is located midway between the inclined portions (18) of the pair of side frames. According to this configuration, the inclined portions of the pair of side frames have low rigidity, but by providing the rear bracket midway between the inclined portions, the rigidity of the inclined portions is increased by the rear bracket and the rear fixing portion, and deformation of the inclined portions is effectively suppressed.

[0046] In an eighth aspect, in any one of the fourth to seventh aspects, the lower surface of the battery case is inclined along the pair of side frames. With this configuration, the overhang lengths of the front bracket and the rear bracket can be shortened, thereby increasing the rigidity of the front bracket and the rear bracket.

[0047] In a ninth aspect, in the eighth aspect, the bottom surface of the battery case is inclined more gently than the pair of side frames. With this configuration, even if the battery case is inclined, the amount of protrusion of the battery case forward and the amount of protrusion of the battery case upward are both limited. This makes it easier to ensure storage space for the battery case inside the pair of side frames.

[0048] A tenth aspect is any one of the second to ninth aspects, wherein a front fixing portion is provided at the front end of the lower surface of the battery case, and a rear fixing portion is provided at the rear end of the lower surface of the battery case. With this configuration, the front fixing portion and the rear fixing portion are provided at corners of the battery case, which have high rigidity. The pair of side frames can be connected by the front fixing portion and the rear fixing portion to increase the rigidity of the frame.

[0049] In an eleventh aspect, in the tenth aspect, the front fixing portion protrudes from the front end of the lower surface of the battery case, and the rear fixing portion protrudes from the rear end of the lower surface of the battery case. With this configuration, the fixing pitch between the front fixing portion and the rear fixing portion in the front-to-rear direction can be increased, thereby increasing the support rigidity.

[0050] In a twelfth aspect, in the tenth or eleventh aspect, the front fixing portion and the rear fixing portion protrude from both side surfaces of the battery case. With this configuration, when the vehicle rolls over, an impact is less likely to be transmitted to the battery case, and the cells inside the battery case are protected.

[0051] A thirteenth aspect is any one of the tenth to twelfth aspects, in which the front fixing part is formed in a pillar shape that is long in the vehicle width direction. With this configuration, the front fixing part functions as a bridge, and the pair of side frames are connected by the front fixing part, thereby increasing the rigidity of the body frame.

[0052] A fourteenth aspect is any one of the tenth to thirteenth aspects, wherein the rear fixing part is formed in a pillar shape that is long in the vehicle width direction. With this configuration, the rear fixing part functions as a bridge, and the pair of side frames are connected by the rear fixing part, thereby increasing the rigidity of the body frame.

[0053] Although the present embodiment has been described, other embodiments may be made by combining the above-described embodiments and modifications in whole or in part.

[0054] Furthermore, the technology of the present invention is not limited to the above-described embodiments, and various changes, substitutions, and modifications may be made without departing from the spirit of the technical idea. Furthermore, if the technical idea can be realized in a different way due to technological advances or other derived technologies, it may be implemented using that method. Therefore, the claims cover all embodiments that may fall within the scope of the technical idea. [Explanation of symbols]

[0055] 1: Saddle-type vehicle 11: Head pipe 12: Down frame 13: Side frame 17: Curved section 18: Inclined part 25: Swing arm 28: Rear suspension 31: Battery case 32: Front fixed part 33: Rear fixed part 34: Front bracket 35: Rear bracket 41: Pivot bracket 45: Suspension bracket

Claims

1. A down frame extending downward from the head pipe at the front of the vehicle body; A pair of side frames connected to a lower portion of the down frame; a battery case disposed inside the pair of side frames, the pair of side frames extend rearward from the down frame and rise obliquely rearward in front of the battery case, A pivot bracket is provided midway in the extension direction of the pair of side frames, and a swing arm is supported by the pivot bracket, a suspension bracket is provided at the rear of the pair of side frames, and a rear suspension is supported by the suspension bracket; A saddle-type vehicle, wherein the pair of side frames are connected via the battery case.

2. a front fixing portion and a rear fixing portion are provided at the front and rear of the battery case, and the front fixing portion and the rear fixing portion are fixed to the pair of side frames; 2. The straddle-type vehicle according to claim 1, wherein the pair of side frames start to rise forward of the front fixing portion.

3. 3. The straddle-type vehicle according to claim 2, wherein the pair of side frames are curved and stand up, and the curved portions of the pair of side frames are connected via the front fixing portion.

4. A front bracket projects upward from the curved portion of the pair of side frames, and the front fixing portion is fixed to the front bracket.

4. The saddle-type vehicle according to claim 3, wherein rear brackets extend downward from the rear inclined portions of the curved portions of the pair of side frames, and the rear fixing portions are fixed to the rear brackets.

5. 5. The straddle-type vehicle according to claim 4, wherein the pivot bracket is provided at the curved portions of the pair of side frames.

6. 5. The straddle-type vehicle according to claim 4, wherein the pivot bracket is located on the opposite side of the front bracket across the curved portions of the pair of side frames.

7. 5. The straddle-type vehicle according to claim 4, wherein the rear bracket is located midway between the inclined portions of the pair of side frames.

8. 5. The straddle-type vehicle according to claim 4, wherein the lower surface of the battery case is inclined along the pair of side frames.

9. 9. The straddle-type vehicle according to claim 8, wherein the lower surface of the battery case is inclined more gently than the pair of side frames.

10. 3. The straddle-type vehicle according to claim 2, wherein the front fixing portion is provided at a front end of a lower surface of the battery case, and the rear fixing portion is provided at a rear end of a lower surface of the battery case.

11. 11. The straddle-type vehicle according to claim 10, wherein the front fixing portion protrudes from a front end of a lower surface of the battery case, and the rear fixing portion protrudes from a rear end of a lower surface of the battery case.

12. 3. The straddle-type vehicle according to claim 2, wherein the front fixing portion and the rear fixing portion protrude from both side surfaces of the battery case.

13. 13. The straddle-type vehicle according to claim 12, wherein the front fixing portion is formed in a pillar shape that is long in the vehicle width direction.

14. 14. The straddle-type vehicle according to claim 12, wherein the rear fixing portion is formed in a pillar shape that is long in the vehicle width direction.

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