JP2013203124A - Vehicle body frame of motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve riding comfort by facilitating formation of a deflection of the whole vehicle body frame.SOLUTION: A vehicle body frame of a motorcycle includes a main frame 20 which is extended backward from a head pipe 11 and which has right and left back ends, and right and left pivot plates 30 which are connected to the right and left back ends of the main frame. The main frame comprises an upper pipe 22, and a lower pipe 23 which is arranged at an interval below the upper pipe. Each of the right and left pivot plates has an upper connection portion 32 to which a back end of the upper pipe 22 is to be connected, and a lower connection portion 33 to which a back end of the lower pipe is to be connected at an interval below the upper connection portion. An upper cross member 34 for connecting the upper connection portions together, and a lower cross member 35 for connecting the lower connection portions together are provided.

Description

  The present invention relates to a body frame of a motorcycle.

2. Description of the Related Art Conventionally, as a motorcycle body frame, for example, a motorcycle body frame as disclosed in Patent Document 1 is known. Explaining with reference to the reference, the motorcycle body frame includes a main frame (4) extending rearward from the head pipe (7) and having left and right rear ends, and left and right rear ends of the main frame. And a rear arm bracket (6) connected to each other.
The main frame (4) includes an upper pipe (27) and a lower pipe (28) arranged below the upper pipe (27) with a space therebetween, and the upper and lower pipes (27) (28) A connecting frame (47) welded to the rear end portion is connected to the upper portions of the left and right side portions (60) of the rear arm bracket (6) by mounting bolts (26) and (26).

Japanese Patent Laid-Open No. 08-216960

In the above-described conventional motorcycle body frame, the rear ends of the upper and lower pipes (27), (28) are welded to the connecting frame (47), and the connecting frame (47) is connected to the rear arm bracket (6). Therefore, the coupling strength between the connection frame (47) and the rear arm bracket (6) must be increased. For this reason, the torsional force and the like acting on the vehicle body frame concentrates on the connecting portion between the connecting frame (47) and the rear arm bracket (6), and it is difficult to form the deflection of the entire vehicle body frame.
The problem to be solved by the present invention is to provide a vehicle body frame of a motorcycle that can easily form a bend in the entire vehicle body frame and enhance ride comfort.

In order to solve the above problems, the body frame of the motorcycle of the present invention is:
A main frame extending rearward from the head pipe and having left and right rear ends, and left and right pivot plates connected to the left and right rear ends of the main frame,
The main frame is a body frame of a motorcycle including an upper pipe and a lower pipe disposed below the upper pipe with a space therebetween.
Each of the left and right pivot plates has an upper connecting portion to which the rear end of the upper pipe is connected, and a lower connecting portion to which the rear end of the lower pipe is connected with a space below the upper connecting portion. And
An upper cross member that connects the upper connecting portions and a lower cross member that connects the lower connecting portions are provided.
According to the motorcycle body frame, the rear end of the upper pipe of the main frame and the rear end of the lower pipe are spaced apart from the upper connection portion and the lower connection portion of the pivot plate reinforced by the upper and lower cross members. Therefore, the torsional force acting on the vehicle body frame is distributed to the upper connecting portion and the lower connecting portion. Therefore, it becomes easy to form bending in the whole body frame, and riding comfort can be improved.
In the above-described conventional motorcycle body frame, the rear ends of the upper and lower pipes (27) and (28) are welded to the connecting frame (47), and the connecting frame (47) is connected to the rear arm bracket (6). Therefore, the rear arm bracket (6) did not contribute to the frame formed by the vehicle body frame in a side view.
On the other hand, according to the present invention, the rear end of the upper pipe of the main frame and the rear end of the lower pipe are connected to the upper connection portion and the lower connection portion of the pivot plate with a space therebetween. Will contribute to the frame formed by the body frame in a side view. Also from this point, it becomes easy to form the bending of the entire body frame, and the riding comfort can be enhanced.

A rear cushion that swingably supports a swing arm that supports the rear wheel is supported by the upper cross member or the lower cross member, and the upper cross member and the lower cross member are connected by a connecting member.
With this configuration, the support structure can be simplified by supporting the rear cushion to the upper cross member or the lower cross member, and at the same time, the force acting on the vehicle body frame from the rear cushion is coupled to the upper cross member by the connecting member. Can be dispersed in the lower cross member. Therefore, the entire body frame is more easily bent and the riding comfort is further improved.

In a side view, a straight line connecting the upper connecting portion and the lower connecting portion may be substantially parallel to the axis of the head pipe.
With this configuration, the frame formed by the head pipe, the upper pipe, the lower pipe, and the pivot plate can be brought close to a rectangular parallelepiped, and the entire body frame can be bent while ensuring strength. It becomes easy.

The pivot plate may be configured such that the upper connecting portion and the lower connecting portion are linearly connected.
If comprised in this way, it will become easy to distribute the torsional force which acts on a vehicle body frame to a pivot plate, and will become easy to form the bending in the whole vehicle body frame.

The rear end of the upper pipe extends toward the inside of the vehicle body, and the rear cushion is supported by the upper cross member.
If comprised in this way, it becomes easy to ensure the support strength of a rear cushion by shortening an upper cross member, narrowing the space | interval of rear ends of upper pipes, and making legibility favorable.

The upper cross member may be provided with a support portion for the rear cushion, and the lower cross member may be provided with an engine support portion.
If comprised in this way, the support of a rear cushion and the support of an engine can be disperse | distributed to an upper and lower cross member, and it becomes easy to form the bending in the whole vehicle body frame.

The motorcycle is equipped with a V-type engine having a crankcase, a forward tilt cylinder provided obliquely upward and forward with respect to the crankcase, and a rearward tilt cylinder provided obliquely upward and rearward with respect to the crankcase. In the case of a motorcycle, a first engine support portion disposed at the front portion of the crankcase and below the forward tilt cylinder, and a first engine support portion disposed at the rear portion of the crankcase and below the rear tilt cylinder. It can be set as the structure provided with two engine support parts.
If comprised in this way, a cylinder lower part can be supported before and behind the crankcase of an engine, and an engine can be supported so that the whole engine may be covered with a vehicle body frame. Therefore, the engine protection function can be enhanced.

Further, the motorcycle includes a V-type engine having a crankcase, a forward tilt cylinder provided obliquely upward and forward with respect to the crankcase, and a rearward tilt cylinder provided obliquely upward and rearward with respect to the crankcase. In the case of a mounted motorcycle, the rearward tilting cylinder can be arranged below the upper pipe and ahead of the pivot plate in a side view.
If comprised in this way, the protection function of a back tilt cylinder can be improved.

1 is a side view of a motorcycle using an embodiment of a body frame of a motorcycle according to the present invention. The side view which shows the head pipe 11, the main frame 20, and the pivot plate 30. FIG. FIG. 3 is a partially omitted rear view of FIG. 2. The figure which looked at FIG. 2 from the axial direction upper direction of the head pipe 11. FIG. The figure which showed the side surface and back surface which show an example of the joint member of a rear cushion simultaneously.

  Embodiments of a body frame of a motorcycle according to the present invention will be described below with reference to the drawings. In each figure, the same reference numerals are given to the same or corresponding parts.

  A motorcycle 1 shown in FIG. 1 has a body frame 10. The vehicle body frame 10 is provided at a head pipe 11 that rotatably supports a front fork 3 that rotatably supports a front wheel 2f, a main frame 20 that extends rearward from the head pipe 11, and a rear lower portion of the main frame 20. A pivot plate 30 that pivotally supports the swing arm 4 that pivotally supports the rear wheel 2r by a pivot shaft 4p, and a rear frame 40 that is provided obliquely rearward from the upper portion of the pivot plate 30. .

A prime mover (engine) 5 is disposed in front of the pivot plate 30, and the rear wheel 2r is driven by the prime mover 5 via the drive chain 5d.
The engine 5 is a V-type engine having a crankcase 5c, a forwardly inclined cylinder 5f provided obliquely upward and forward with respect to the crankcase 5c, and a backwardly inclined cylinder 5r provided obliquely upward and rearward with respect to the crankcase 5c. It is.

  2 to 4, the main frame 20 has left and right rear ends 21L and 21R, and left and right pivot plates 30L and 30R are respectively attached to the left and right rear ends 21L and 21R of the main frame 20. It is connected.

The main frame 20 includes an upper pipe 22 and a lower pipe 23 disposed below the upper pipe 22 with a space therebetween, and the left and right pivot plates 30L and 30R are respectively rear end 22r of the upper pipe 22. Are connected to each other, and a lower connecting portion 33 to which the rear end 23r of the lower pipe 23 is connected with a space below the upper connecting portion 32.
The left and right upper connecting portions 32 are connected by an upper cross member 34, and the lower connecting portions 33 are connected by a lower cross member 35.

  According to the vehicle body frame 10 of the motorcycle, the upper end of the upper pipe 22 of the main frame 20 and the rear end 23r of the lower pipe 23 are connected together by the upper connection of the pivot plate 30 reinforced by the upper and lower cross members 34 and 35. Since the portion 32 and the lower connecting portion 33 are connected with a space therebetween, a torsional force acting on the vehicle body frame 10 (for example, a torsional force acting around an axis perpendicular to the plane of FIG. Moment acting around the rear end of the frame 20 is distributed to the upper connecting portion 32 and the lower connecting portion 33. Accordingly, it becomes easy to form a bend in the entire body frame 10, and for example, when the vehicle body frame 10 is deformed by following the fall of the heavy engine 5 during turning, the riding comfort of the motorcycle 1 is enhanced. be able to.

  Further, as described above, in the body frame of the conventional motorcycle, the rear arm bracket does not contribute to the frame formed by the body frame in a side view. Since the rear end 22r of the upper pipe 22 of the main frame 20 and the rear end 23r of the lower pipe 23 are connected to the upper connection portion 32 and the lower connection portion 33 of the pivot plate 30 with a space therebetween, the pivot plate 30 Will contribute to the frame formed by the body frame 10 in a side view. Also from this point, it becomes easy to form the bending of the entire body frame 10, and the riding comfort of the motorcycle 1 can be enhanced.

As shown in FIG. 1, the motorcycle 1 includes a rear cushion 6 that swingably supports a swing arm 4 that supports a rear wheel 2r. The rear cushion 6 has a lower end connected to the swing arm 4 via a link mechanism (not shown) and an upper end connected to the vehicle body frame 10.
As shown in FIGS. 2 and 3, in this embodiment, the rear cushion 6 is supported by the upper cross member 34, and the upper cross member 34 and the lower cross member 35 are connected by the connecting member 36.

With this configuration, the support structure can be simplified by supporting the rear cushion 6 on the upper cross member 34, and at the same time, the force acting on the vehicle body frame 10 from the rear cushion 6 is applied to the upper cross member by the connecting member 36. 34 and the lower cross member 35 can be dispersed. Therefore, the entire body frame is more easily bent and the riding comfort is further improved.
Such an effect can be obtained even when the rear cushion 6 is supported by the lower cross member 35.

  An appropriate structure can be adopted as a connecting structure to the cross member (the upper cross member 34 in the drawing) at the upper part of the rear cushion. For example, as shown in FIG. 5, a rod 7r having a male screw formed at the upper end, a U-shaped connecting bracket 7b connected to the lower end of the rod 7r so as to be rotatable around the rod 7r, and the connection Using the joint member 7 having a pin 7p for connecting the upper portion of the rear cushion 6 to the metal fitting 7bb, the tip of the rod 7r is screwed to a boss portion 34b (FIG. 3) with a female screw hole provided in the cross member. The rear cushion 6 can be connected to a cross member (the upper cross member is shown).

As shown in FIG. 2, the straight line L <b> 2 connecting the upper connecting portion 32 and the lower connecting portion 33 is substantially parallel to the axis L <b> 1 of the head pipe 11 in a side view.
With this configuration, the frame formed by the head pipe 11, the upper pipe 22, the lower pipe 23, and the pivot plate 30 can be brought close to a rectangular parallelepiped, and the entire body frame can be flexed while ensuring strength. Easier to form.

As shown in FIGS. 2 to 4, the pivot plate 30 linearly connects the upper connecting portion 32 and the lower connecting portion 33. The linear connection portion is indicated by reference numeral 30s.
If comprised in this way, it will become easy to distribute the twisting force which acts on the vehicle body frame 10 to the pivot plate 30, and it will become easy to form the bending in the whole vehicle body frame.

As shown in FIGS. 3 and 4, the rear end 22r of the upper pipe 22 is bent and extended toward the inner side of the vehicle body, and the rear cushion 6 is supported by the upper cross member 34. 2 and 4, the hatched portion is a bent portion.
With this configuration, the distance between the rear ends 22r of the upper pipe 22 is reduced to improve the rider's footing ability sitting on the seat 8 (FIG. 1) of the motorcycle 1, while the upper cross member 34 is shortened to reduce the rear. It becomes easy to ensure the support strength of the cushion 6.

As described above, the upper cross member 34 is provided with the support portion 34b of the rear cushion 6, while the lower cross member 35 is provided with the support portion H2 of the engine 5 as shown in FIGS. ing.
If comprised in this way, the support of the rear cushion 6 and the support of the engine 5 can be disperse | distributed to the upper and lower cross members 34 and 35, and it becomes easy to form the bending in the whole vehicle body frame.
The support portion H2 can be composed of left and right brackets 35b, 35b provided integrally with the lower cross member 35.

The vehicle body frame 10 is disposed at the front of the crankcase 5c of the engine 5 and below the forward tilting cylinder 5f, and at the rear of the crankcase 5c and below the backward tilting cylinder 5r. The second engine support portion H2 is provided.
With this configuration, the engine 5 can be supported by supporting the lower part of the cylinder before and after the crankcase of the engine 5 and covering the entire engine 5 with the vehicle body frame 10. Therefore, the protection function of the engine 5 can be enhanced.

As shown in FIGS. 1 and 2, the rearward tilting cylinder 5 r is disposed below the upper pipe 22 and ahead of the pivot plate 30 in a side view.
If comprised in this way, the protection function of the backward tilt cylinder 5r can be improved.

As shown in FIG. 2 and the like, the upper pipe 22 and the lower pipe 23 are connected by a plurality of connecting pipes (the illustrated ones are 24-27), and the lower pipe 23 is provided with an engine support portion H3. It has been.
And all the connection parts 24b, 25b, 26b, and 27b with respect to the lower pipe 23 of the some connection pipes 24-27 are provided in parts other than the said engine support part H3.
If comprised in this way, since all the connection parts 24b-27b with respect to the lower pipe 23 of several connection pipes 24-27 are provided in parts other than the said engine support part H3, the rigidity of the engine support part H3 will become low simultaneously. The force acting on the engine support H3 when the vehicle body is tilted is likely to be distributed to parts other than the engine support H3. Accordingly, the entire body frame is easily bent, and the ride comfort can be enhanced.

The connection pipes 24 to 27 are arranged so as to form a quadrilateral or more polygonal shape with the upper pipe 22 as the upper side 22s and the lower pipe 23 as the lower side 23s in a side view (FIG. 2).
If comprised in this way, since it will be in the state (distributed state) where the connection part of the upper and lower pipes 22 and 23 and the connection pipes 24-27 does not concentrate, the force which acts on a vehicle body frame is easy to be disperse | distributed to the whole vehicle body frame. As a result, the entire body frame is more easily bent and the riding comfort is further improved.
In addition, since the connecting portions between the upper and lower pipes 22 and 23 and the connecting pipes 24 to 27 are not concentrated, the connecting operation when the upper and lower pipes 22 and 23 and the connecting pipes 24 to 27 are connected by welding is performed. It becomes easier to do. As a result, the connection accuracy is increased, and the accuracy of the entire body frame can be increased.
In FIG. 2, the encircled numbers indicate the number of polygonal corners formed by the connecting pipes 24 to 27, the head pipe 11, and the pivot plate 30 with the upper pipe 22 as the upper side 22 s and the lower pipe 23 as the lower side 23 s. Yes. That is, with the upper pipe 22 as the upper side 22s and the lower pipe 23 as the lower side 23s, the head pipe 11 and the connection pipe 24 form a square, the connection pipes 24 and 25 also form a square, and the connection pipes 25 and 26 form a pentagon. The connecting pipes 26 and 27 form a square, and the connecting pipe 27 and the pivot frame 30 also form a square.

The upper ends 24c, 25c, 26c, 27c of the plurality of connection pipes 24-27 are all connected to the upper pipe 22 without being connected to the other connection pipes 24-27, and the lower ends of the plurality of connection pipes 24-27. 24b, 25b, 26b, 27b are all connected to the lower pipe 23 without being connected to the other connecting pipes 24-27.
If comprised in this way, since it will be in the state (distributed state) where the connection part of the upper and lower pipes 22 and 23 and the connection pipes 24-27 does not concentrate, the force which acts on a vehicle body frame is easy to be disperse | distributed to the whole vehicle body frame. As a result, the entire body frame is more easily bent and the riding comfort is further improved.
In addition, since the connecting portions between the upper and lower pipes 22 and 23 and the connecting pipes 24 to 27 are not concentrated, the connecting operation when the upper and lower pipes 22 and 23 and the connecting pipes 24 to 27 are connected by welding is performed. It becomes easier to do. As a result, the connection accuracy is increased, and the accuracy of the entire body frame can be increased.

The lower end of at least one of the plurality of connection pipes 24 to 27 (the connection pipe 26 in the drawing) is connected to the vicinity of the engine support H <b> 3 in the lower pipe 23.
If comprised in this way, dispersion | distribution of a force can be aimed at, reinforcing the engine support part H3 to which the force from the engine 5 acts with the connection pipe 26 efficiently.

  As shown in FIG. 4, when viewed from the axial direction of the head pipe 11, the upper pipe 22 and the lower pipe 23 are respectively widened portions 22 b and 23 b extending diagonally rearward from the head pipe 11 and the widened portions 22 b and 23 b. It has rear extension parts 22d and 23d extending rearward through bent parts 22c and 23c that bend inward in the vehicle width direction at the rear end. 2 and 4, the hatched portion is a bent portion.

  As shown in FIG. 2, at least one of the plurality of connection pipes 24 to 27 (the connection pipe 25 in the drawing) is a bent portion 22 c of the upper pipe 22 and the lower pipe 23 in a side view. , 23c are connected to each other, and the upper and lower connecting portions 25c, 25b of the connecting pipe 25 are arranged so as to be distributed before and after the bent portions 22c, 23c. That is, the upper end 25 c of the connection pipe 25 is connected to the vicinity of the rear portion of the bent portion 22 c of the upper pipe 22, and the lower end 25 b of the connection pipe 25 is connected to the vicinity of the front portion of the bent portion 23 c of the lower pipe 23.

If comprised in this way, the ease of bending can also be ensured, ensuring the connection strength of the upper and lower pipes 22 and 23. FIG.
In order to secure the connection strength between the upper and lower pipes 22 and 23, a structure is employed in which the bent portions 22c and 23c of the upper and lower pipes 22 and 23, the front vicinity, or the rear vicinity are connected by a connection pipe 25. obtain. However, in such a structure, the presence of the connecting pipe 25 makes it difficult for the distance between the upper and lower frames 22 and 23 to be displaced, and as a result, the body frame is less likely to bend.
On the other hand, in this embodiment, the connection strength of the upper and lower pipes 22 and 23 can be secured by connecting the vicinity of the bent portions 22c and 23c of the upper pipe 22 and the lower pipe 23. By distributing the upper and lower connecting portions 25c and 25b of the pipe 25 to the front and rear of the bent portions 22c and 23c, the distance between the upper and lower frames 22 and 23 is easily displaced, and as a result, the vehicle body frame can be easily bent.

The rear extending portion 23d of the lower pipe 23 is provided with a hanging pipe 28 that extends integrally and linearly downwardly from the rear extending portion 23d in a substantially vertical direction. The lower portion of the hanging pipe 28 is below the cylinder 5f. The cylinder lower support portion H1 that supports the engine 5 is provided.
If comprised in this way, since the engine 5 can be supported so that it may hold from the cylinder downward direction by the drooping pipe 28, the shake of the engine 5 can be decreased.
Moreover, since the drooping pipe 28 extends integrally and linearly from the rear extension 23d of the lower pipe 23, it is possible to ensure the flexibility of the vehicle body frame, and the drooping pipe 28 extends downward substantially in the vertical direction. Therefore, the length of the hanging pipe 28 can be shortened as much as possible.
Reference numeral 29 denotes a reinforcing pipe for the hanging pipe 28.

The vehicle body frame 10 has a lower front support portion (in this embodiment, the cylinder lower support portion H1) that supports the front portion of the engine 5 below the crankshaft 5c1 of the engine 5, and a crankshaft 5c1 of the engine 5. A lower rear support portion H4 that supports the rear portion of the engine 5 is provided below.
With this configuration, the engine 5 can be supported by the lower front support part H1 and the lower rear support part H4 so as to be held from below the crankshaft 5c1, so that the vibration of the engine 5 can be reduced. it can.
The lower rear support portion H4 can be configured by a pivot shaft 4p that supports the swing arm 4 so as to be swingable.

As shown in FIG. 4, between the left and right rear extension parts 22d and 22d of the upper pipe 22 and between the left and right rear extension parts 23d and 23d of the lower pipe 23, the rear extension parts are connected to each other. A cross member arranged in the width direction is not provided.
With this configuration, it is possible to easily displace the space between the left and right rearward extending portions 22d and 23d to make the body frame bend easily, and use the space 20s between the left and right rearward extending portions. It becomes easy to do.
3 and 4, reference numeral 23 f denotes a cross pipe that connects the front portions of the widened portion 23 b of the lower pipe 23.

  As shown in FIG. 1, the rear frame 40 is a substantially Y-shaped frame having a seat rail 41 that supports the seat 8 and a support frame 42 that supports the seat rail 41 from below. 41, the tip 41c of the pivot plate 30 is mounted on the mounting portion 37 (see FIGS. 2 to 4), and the tip 42c of the support frame 42 is mounted on the mounting portion 38 of the pivot plate 30 (see FIGS. 2 to 4). It is fixed to the pivot plate 30 by being fastened and fixed by a nut (not shown).

  1 to 4, reference numerals 35 d and 35 d are mounting brackets for the fuel tank 9, and are provided integrally with the cross member 35. Reference numerals 26 d and 26 d denote cowl mounting brackets which are integrally provided on the connecting pipe 26.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified within the scope of the gist of the present invention.

  4: swing arm, 5: engine, 5c: crankcase, 5f: forward tilt cylinder, 5r: backward tilt cylinder, 6: rear cushion, 10: body frame, 11: head pipe, 20: main frame, 22: upper pipe 22b: rear end, 23: lower pipe, 23b: rear end, 30: pivot plate, 32: upper connecting portion, 33: lower connecting portion, 34: upper cross member, 35: lower cross member, 36: connecting member, H1: 1st engine support part, H2: Engine support part (2nd engine support part).

Claims (8)

A main frame (20) extending rearward from the head pipe (11) and having left and right rear ends, and left and right pivot plates (30) connected to the left and right rear ends of the main frame (20),
The main frame (20) is a vehicle body frame of a motorcycle including an upper pipe (22) and a lower pipe (23) disposed below the upper pipe (22) with a space therebetween.
Each of the left and right pivot plates (30) includes an upper connecting portion (32) to which a rear end of the upper pipe (22) is connected, and the lower pipe (30) spaced below the upper connecting portion (32). 23) a lower connecting portion (33) to which the rear end is connected,
A vehicle body frame for a motorcycle, comprising an upper cross member (34) for connecting the upper connecting portions (32) and a lower cross member (35) for connecting the lower connecting portions (33). . In claim 1,
A rear cushion (6) that swingably supports a swing arm (4) that supports a rear wheel is supported by the upper cross member (34) or the lower cross member (35), and the upper cross member (34) and the lower cross are supported. A body frame of a motorcycle, wherein the member (35) is connected by a connecting member (36). In claim 1 or 2,
In a side view, a straight line (L2) connecting the upper connecting part (32) and the lower connecting part (33) is substantially parallel to the axis (L1) of the head pipe (11). Motorcycle body frame. In any one of Claims 1-3,
The pivot plate (30) is a vehicle body frame of a motorcycle, wherein the upper connecting portion (32) and the lower connecting portion (33) are linearly connected. In any one of Claims 2-4,
A body frame of a motorcycle, wherein a rear end of the upper pipe (22) extends toward the inside of the vehicle body, and the rear cushion (6) is supported by the upper cross member (34). In any one of Claims 2-5,
A body frame for a motorcycle, wherein the upper cross member (34) is provided with a support portion (34b) for the rear cushion (6), and the lower cross member (35) is provided with an engine support portion (H2). . In any one of Claims 1-6,
The motorcycle is provided with a crankcase (5c), a forward tilt cylinder (5f) provided obliquely upward and forward with respect to the crankcase (5c), and an obliquely upward and rearward position with respect to the crankcase (5c). A motorcycle equipped with a V-type engine (5) having a rearward tilting cylinder (5r);
A first engine support (H1) disposed at the front of the crankcase (5c) and below the forward tilting cylinder (5f);
A second engine support (H2) disposed at the rear of the crankcase (5c) and below the rearward tilting cylinder (5r);
A motorcycle body frame characterized by comprising: In any one of Claims 1-7,
The motorcycle is provided with a crankcase (5c), a forward tilt cylinder (5f) provided obliquely upward and forward with respect to the crankcase (5c), and an obliquely upward and rearward position with respect to the crankcase (5c). A motorcycle equipped with a V-type engine (5) having a rearward tilting cylinder (5r);
The vehicle body frame of a motorcycle, wherein the rearward tilting cylinder (5r) is disposed below the upper pipe (22) and ahead of the pivot plate (30) in a side view.

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