WO2018179795A1

WO2018179795A1 - Body structure for saddled vehicles

Info

Publication number: WO2018179795A1
Application number: PCT/JP2018/003003
Authority: WO
Inventors: 弘幸関; 伸也高橋; 昭史種山; 裕一田中; 孝幸小西
Original assignee: 本田技研工業株式会社
Priority date: 2017-03-27
Filing date: 2018-01-30
Publication date: 2018-10-04
Also published as: CN110431070B; JPWO2018179795A1; CN110431070A; JP6694550B2

Abstract

This body structure for saddled vehicles comprises a first frame (21), a second frame (23), and a patch (30) joined to the first frame (21) and the second frame (23). The patch (30) is joined to the bent portion (21 c) of the first frame (21). A weld (23w) of the second frame (23), where the patch (30) and the second frame (23) are joined, is provided on the patch (30). A joining portion (31h) where the patch (30) and the first frame (21) are joined is provided at a different portion of the patch (30) to where the weld (23w) of the second frame (23) is located.

Description

Body structure of straddle type vehicle

The present invention relates to a vehicle body structure of a saddle-ride type vehicle.
Priority is claimed on Japanese Patent Application No. 2017-060983, filed March 27, 2017, the content of which is incorporated herein by reference.

Conventionally, in a vehicle body structure of a saddle-ride type vehicle, a structure in which a seat frame is directly welded to a main frame to which a plurality of members are welded is known. For example, Patent Document 1 discloses a technique in which a head pipe or the like is joined to a front side frame by welding, and then the front side frame and the rear frame are laser welded.

Japanese Unexamined Patent Publication No. 2015-189426

However, since the residual stress caused by the welding condition of each member joined to the main frame differs from vehicle to vehicle, the amount of spring back accompanying heat input at welding also differs from vehicle to vehicle. As a result, many man-hours are required to ensure the dimensional accuracy of the entire body frame, and it may be difficult to predict or adjust the amount of springback associated with the residual stress.

An aspect of the present invention is to reduce the number of steps for securing the dimensional accuracy of the entire body frame in the vehicle body structure of a saddle-ride type vehicle, and to easily predict or adjust the amount of springback associated with residual stress. Do.

The vehicle body structure of the saddle-ride type vehicle according to the present invention adopts the following configuration.
(1) A vehicle body structure of a saddle-ride type vehicle (1) according to an aspect of the present invention includes a first frame, a second frame, and a patch coupled to the first frame and the second frame. The patch is coupled to a bend of the first frame, and a weld of a second frame to which the patch and the second frame are coupled is provided on the patch; The joint part to which the patch and the first frame are coupled is provided at a site different from the weld part of the two frames.

(2) In the aspect of (1), the first frame may be a main frame in which a plurality of members are welded.

(3) In the aspect of the above (1) or (2), a welded portion of the first frame to which the patch and the first frame are coupled may be provided all around the coupling portion.

(4) In the aspect according to any one of (1) to (3), the welded portion of the second frame may include a first welded portion and a second welded portion. A turnaround may be provided such that the weld and the second weld are located on different planes.

(5) In the aspect of any one of the above (1) to (4), the patch may be provided with a continuous surface with respect to the second frame.

(6) In the aspect of said (5), the notch for providing the said continuous surface may be formed in the said patch.

According to the above aspect (1), by providing the weld portion of the second frame to the patch coupled to the bend portion of the first frame, compared to the case where the second frame is directly welded to the first frame The heat input to the first frame can be suppressed when welding the second frame. Therefore, it is possible to suppress the occurrence of springback in the coupled state of the first frame and the second frame via the patch.
Therefore, it is possible to reduce the number of steps for securing the dimensional accuracy of the entire vehicle body frame, and easily predict or adjust the amount of springback associated with the residual stress.
In addition, by providing a joint where the patch and the first frame are joined at a site different from the weld with the second frame in the patch, the outer peripheral edge of the patch particularly susceptible to stress is made a non-weld, Since the first frame can be deformed, stress applied to the first frame can be released.

According to the above aspect (2), since the first frame is a main frame to which a plurality of members are welded, internal stress (springback amount) caused by individual differences (welding differences etc.) of a plurality of members Even in the main frame that is particularly susceptible to variations, it is possible to suppress the heat input at the time of welding of the second frame. Therefore, it is preferable because the number of steps for securing the dimensional accuracy of the entire body frame can be reduced, and prediction or adjustment of the amount of spring back accompanying residual stress can be easily performed.

According to the aspect of the above (3), by providing the weld portion of the first frame where the patch and the first frame are joined to the entire circumference of the joint portion, comparison with the case where the weld portion is provided locally on the joint portion Thus, it is possible to suppress the application of stress to the local part of the joint.

According to the aspect of the above (4), the patch is provided with the turnback portion so that the first weld portion and the second weld portion of the weld portion of the second frame are positioned on different surfaces, Since the welds of the two frames can be offset from the same plane, mounting rigidity can be enhanced.

According to the aspect of the above (5), the patch is provided with the continuous surface with respect to the second frame, whereby the separation of the patch and the second frame (a gap is generated between the patch and the second frame) Welding strength can be improved, and welding strength can be improved.

According to the aspect of said (6), the notch can be provided in a patch for providing a continuous surface, and the said continuous surface can be comprised using a part of patch. Therefore, the number of parts can be reduced as compared with the case where a new member is separately provided to constitute the continuous surface.

1 is a left side view of a motorcycle according to an embodiment of the present invention. FIG. 6 is a left side view of a vehicle body frame of the motorcycle. FIG. 6 is a left side view of the main part of the vehicle body structure of the motorcycle. It is a top view of the principal part of the body structure of the above-mentioned motorcycle. FIG. 5 is a view including a VV cross section of FIG. 3; It is a perspective view of the patch of the vehicle body structure of the said two-wheeled motor vehicle. FIG. 10 is a perspective view of a modification of the vehicle body structure of the motorcycle. FIG. 16 is a cross-sectional view corresponding to FIG. 5 of a modification of the vehicle body structure of the motorcycle.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, directions such as front, rear, left, and right are the same as the directions in the vehicle described below unless otherwise specified. Further, an arrow FR indicating the front of the vehicle, an arrow LH indicating the left of the vehicle, and an arrow UP indicating the upper of the vehicle are shown at appropriate positions in the drawings used for the following description.

<Whole vehicle>
FIG. 1 shows a motorcycle 1 as an example of a saddle-ride type vehicle. Referring to FIG. 1, a motorcycle 1 includes a front wheel 3 steered by a steering wheel 5 and a rear wheel 4 driven by a power unit 10 including an engine. The motorcycle 1 according to the embodiment is a backbone frame type motorcycle having one main frame (backbone frame) on the left and right center of the vehicle body.
Hereinafter, a motorcycle may be simply referred to as a "vehicle".

Steering system parts including the steering wheel 5 and the front wheel 3 are steerably supported by a head pipe 20 formed at the front end of the vehicle body frame 2. For example, the handle 5 is a bar handle manufactured by bending a cylindrical single metal handle pipe. A handle steering shaft connected to the handle 5 is inserted into the head pipe 20. A power unit 10 is disposed at the front-rear center of the vehicle body frame 2. The swing arm 6 is disposed on the rear side of the power unit 10. The swing arm 6 is pivotally supported at the rear lower portion of the vehicle body frame 2 so as to be vertically pivotable about a pivot shaft 6 a.

For example, the vehicle body frame 2 is formed by integrally combining plural types of steel materials by welding or the like. In a side view, the vehicle body frame 2 is a cylindrical head pipe 20 which extends vertically and is inclined so as to be positioned downward toward the front side, and after extending rearward and downward from the upper rear of the head pipe 20 along the left and right center of the vehicle body The direction is changed by a bent portion 21c (specifically, a portion that is convexly curved in a rearward and upward direction) and is extended downward (specifically, from the upper rear of the head pipe 20 to the rear lower along the left-right center of the vehicle body A main including a front inclined part 21a that reaches the bent part 21c and a rear inclined part 21b that extends backward and downward from the bent part 21c along the vehicle left-right center more sharply than the front inclined part 21a A frame 21 (first frame), a single down frame 22 that extends rearward and downward from the lower rear of the head pipe 20 along the left-right center of the vehicle body and is steeper than the main frame 21, and the main frame 21 A pair of left and right seat frames 23 (second frame) extending backward from the patch 30 coupled to the bending portion 21c (specifically, extending backward after curving with a convex shape in the front downward direction in a side view), A pair of left and right seat sub-frames 24 extending diagonally upward and rearward from the rear side inclined portion 21 b of the frame 21 to the rear of the left and right seat frames 23 and the front end of the main frame 21 and the front end of the lower frame 22 The front gusset 25, the rear frame 26 connected to the rear end of the left and right seat frames 23 and the rear upper end of the left and right seat sub frames 24, the rear side inclined portion 21b of the main frame 21 and the front of the left and right seat sub frames 24 And a lower gusset 27 connected to the lower end.
The rear inclined portion 21b of the main frame 21 constitutes a pivot frame that rotatably supports the pivot shaft 6a.

The power unit 10 protrudes forward and upward from the front of the crankcase 11 in the side view of the crankcase 11 and in FIG. 1 (specifically, the upper side is gently inclined toward the vertical upper side so as to be positioned forward) And a cylinder portion 12. The front portion of the crankcase 11 is attached to the lower end portion of the lower frame 22. The rear portion of the crankcase 11 is attached to the rear inclined portion 21 b of the main frame 21. That is, the lower end portion of the lower frame 22 and the rear inclined portion 21b of the main frame 21 constitute an engine hanger.

An intake device 13 and an exhaust device 14 are connected to the cylinder portion 12. The intake device 13 includes a throttle body connected to the rear wall of the cylinder portion 12 and communicating with the intake port to adjust an intake amount, and an air cleaner (not shown) that cleans intake air to the throttle body and intakes the power unit 10. And.

The exhaust device 14 is connected to the front wall of the cylinder portion 12 and in communication with the exhaust port to extend rearward of the power unit 10 in a rearward and downward direction, and then bent to extend forward and backward under the power unit 10; And a muffler (not shown) connected to the rear end and extending diagonally upward at the right side of the rear wheel 4.

Rear cushions 7 are provided on the left and right sides of the rear wheel 4. In the side view of FIG. 1, the rear cushion 7 is gently inclined to the vertical upper side so as to be positioned forward in the upper side. A rear cushion upper attachment portion 26 a to which the upper end portion of the rear cushion 7 is attached is provided on the left and right side portions of the rear frame 26. On the other hand, at the rear end of the swing arm 6, a rear cushion lower mounting portion 6b to which the lower end of the rear cushion 7 is attached is provided.

A fuel tank 8 is attached to the main frame 21. A seat 9 extending in the front-rear direction along the left and right seat frames 23 and the rear frame 26 is provided at the rear of the fuel tank 8 and above the left and right seat frames 23 and the rear frame 26.

In FIG. 1, reference numeral 15 denotes a cowl which covers the vehicle body frame 2 from the outside in the vehicle width direction, reference numeral 16 denotes a pair of left and right front forks disposed on the left and right of the front wheel 3, and reference numeral 17 denotes a head of the left and right front forks 16. The steering stem supported by the pipe 20, reference numeral 17a indicates a bottom bridge of the steering stem 17, reference numeral 17b indicates a top bridge of the steering stem 17, and reference numeral 18 indicates a dress guard.

<Body structure of vehicle>
As shown in FIG. 2, a plurality of

members

20, 22, 25, 27, 30 are welded to the main frame 21 of the vehicle body frame 2. Specifically, the head pipe 20, the lower frame 22 and the front gusset 25 are welded to the front of the front side inclined portion 21a of the main frame 21. A lower gusset 27 is welded to the lower portion of the rear side inclined portion 21 b of the main frame 21. The patch 30 is welded to the bending portion 21 c of the main frame 21. In the embodiment, the plurality of

members

20, 22, 25, 27, 30 welded to the main frame 21 include the head pipe 20, the lower frame 22, the front gusset 25, the lower gusset 27, and the patch 30.

As shown in FIG. 3, the patch 30 is joined to the bent portion 21c of the main frame 21 at a welded portion 21w (hereinafter also referred to as "main frame welded portion 21w"). The patch 30 coupled to the bent portion 21c of the main frame 21 is provided with welds 23w of the left and right seat frames 23 (hereinafter also referred to as "seat frame welds 23w"). In FIG. 3, hatched portions (dot hatched portions) indicate welds.

As shown in FIG. 2, a plurality of through holes 21 h for attaching vehicle parts such as a bracket are formed in the main frame 21. In FIG. 2, reference numeral 22h denotes a through hole through which a fastening member (for example, a shaft of a bolt) (not shown) for fixing the front portion of the crankcase 11 (see FIG. 1) is inserted. Reference numeral 27h denotes the crankcase 11 (FIG. 1) The unshown fastening member (for example, the axial part of a volt | bolt) which fixes the rear part of (reference) shows the through-hole which each penetrates.

In the embodiment, the main frame 21 is formed by pressing a square pipe made of a high tension material (high tensile steel). The down frame 22 and the rear frame 26 are press-formed products made of a high tension material (high tensile steel). On the other hand, the seat frame 23 and the seat sub-frame 24 are formed by pressing a round pipe made of ordinary steel. The lower set 27 is a press-formed product made of ordinary steel.

As shown in FIG. 5, the cross sectional shape of the main frame 21 (the cross sectional shape orthogonal to the extending direction of the main frame 21) has a rectangular frame shape. Specifically, the cross-sectional shape of the bent portion 21c of the main frame 21 is a rectangular frame having a length in the vehicle width direction, and the left and right lower end portions thereof project slightly downward. Hereinafter, in the components of the vehicle body frame 2, "L" may be attached to components disposed on the left side, and "R" may be attached to components disposed on the right side. In the figure, reference symbol CL indicates a vehicle body left-right center line.

The lateral cross sectional shapes of the left and right seat frames 23L, 23R (the cross sectional shapes orthogonal to the extending direction of the left and right seat frames 23L, 23R) have an annular shape. Specifically, the cross-sectional shapes of the left and right seat frames 23L and 23R have a curved shape that is convex outward in the vehicle width direction in the cross sectional view of FIG. It extends vertically in a straight line along the left and right sides of the bent portion 21c.

The front ends 23a of the left and right seat frames 23L and 23R are inclined with respect to the left and right side surfaces of the main frame 21 as viewed from above in FIG. Specifically, the front ends 23a of the left and right seat frames 23L, 23R are inclined so as to be positioned outward in the vehicle width direction from the outer surface of the main frame 21 in the upper direction in the top view of FIG. Thereby, the stress applied to the front ends 23a of the left and right seat frames 23L, 23R can be dispersed.

As shown in FIG. 4, the patch 30 includes a patch body 31 coupled to the bent portion 21 c of the main frame 21 and a pair of left and right pairs extending from the left and right ends of the patch body 31 along the left and right seat frames 23L and 23R.

Side wall portions

32L and 32R. As shown in FIG. 5, the continuous portion 31a of the patch main body 31 and the left and right

side wall portions

32L and 32R has a curved shape (round shape).

In the side view of FIG. 3, the patch main body 31 is gently curved to extend in the back and forth direction with a convex shape on the rear upper side. As shown in FIG. 4, the patch main body 31 is provided with a coupling portion 31 h coupled to the bending portion 21 c of the main frame 21. The coupling portion 31 h is an outer peripheral edge of an opening having a long hole shape having a longitudinal front and rear along the left and right center of the vehicle body. The joint portion 31 h is located at a position different from the weld portion 23 w of the left and right seat frames 23 L, 23 R in the patch 30.
At the front end portion of the patch body 31, a notch 31i which is recessed rearward is formed. Thereby, the patch 30 can be reduced in weight while securing the welding length with the left and right seat frames 23L, 23R.

A welded portion 21w1 (hereinafter, also referred to as "main frame upper welded portion 21w1") of the upper portion (upper surface) of the bent portion 21c of the main frame 21 is provided on the entire circumference of the coupling portion 31h. In the top view of FIG. 4, the upper welding welding portion 21 w 1 of the main frame has an annular shape having a longitudinal front and back so as to follow the outer shape of the coupling portion 31 h. That is, the upper welding welding portion 21w1 is continuous along the outer shape of the coupling portion 31h.

In the cross-sectional view of FIG. 5, the left and right

side wall portions

32L and 32R are formed linearly in a straight line from the left and right side ends (right and left curved portions) of the patch main body 31 to the left and right side portions of the bent portion 21c of the main frame 21. It includes an extending vertically extending portion 32a, and a left and right extending portion 32b extending outward in the vehicle width direction from the lower end of the vertically extending portion 32a to the lower center of the left and right seat frames 23L and 23R. The continuous portion (folded back portion 32c) of the vertically extending portion 32a and the left and right extending portion 32b has a curved shape (round shape). The folded back portion 32c is a portion (fold) in which the welded portions 23w1 and 23w2 of the left and right seat frames 23L and 23R are positioned on different surfaces in the vehicle width direction.

Specifically, in the cross-sectional view of FIG. 5, the welded portion 23w1 is provided on the joint surface S1 between the vertically extending portion 32a of the patch 30 and the vehicle width direction inner end portion 23e of the left and right seat frames 23L, 23R. . In the cross-sectional view of FIG. 5, the welded portion 23w2 is an outer end portion in the vehicle width direction of the left and right extended portions 32b extending outward from the lower end of the vertically extending portion 32a in the vehicle width direction. It is provided on the surface S2 located at the center of the cross section of 23R.

The lower end edge of the vertically extending portion 32a and the left and right extending portion 32b of the left and right side wall portions 32 (only the left side wall portion 32L is shown in FIG. 3) in the side view of FIG. 23 L is gently curved with a convex front downward curve along the lower surface of the drawing.

Welded portion 23w1 of the vehicle width direction inner portion 23u of the upper portion of the left and right seat frames 23L, 23R (hereinafter referred to as "welded portion on the seat frame" in the upper part of the left and right

side wall portions

32L, 32R in the top view of FIG. 23 w 1) is provided. In the top view of FIG. 4, the seat frame upper welding portion 23w1 follows the boundary between the upper portion of the vertically extending portion 32a in the left and right

side wall portions

32L and 32R and the vehicle width direction inner portion 23u in the upper portion of the left and right seat frames 23L and 23R. It extends straight back and forth.

Welds 21w2 of the left and right sides of the lower part of the bent portion 21c of the main frame 21 (hereinafter referred to as "main-frame lower-welded portion 21w2" on the inner side in the vehicle width direction of the folded back portions 32c in the left and right side wall portions It is also provided. In the side view of FIG. 3, the lower main frame welding portion 21w2 is the left and right side portions (FIG. 3) of the folded back portions 32c in the left and right side wall portions 32 (only the left side wall 32L is shown in FIG. 3) and the bent portions 21c of the main frame 21. Then, it extends in the front and back direction with a convex shape on the front lower side along the boundary with the left side portion). The main frame welding portion 21 w includes a main frame upper welding portion 21 w 1 and a main frame lower welding portion 21 w 2.

In the cross-sectional view of FIG. 5, at the outer end of the left and right

side wall portions

32L and 32R in the vehicle width direction of the left and right extending portions 32b, the welded portion 23w2 of the lower portion of the left and right seat frames 23L and 23R It is also provided. In a side view of FIG. 3, the lower seat frame welds 23 w 2 extend forward and backward convexly downward along the lower surfaces of the left and right seat frames 23 (only the left seat frame 23 L is shown in FIG. 3). The seat frame welded portion 23 w includes an upper seat frame welded portion 23 w 1 (first welded portion) and a lower seat frame welded portion 23 w 2 (second welded portion).

As shown in FIG. 4, welds are formed at the front and rear ends of the patch 30 (specifically, front and rear ends of the patch body 31, front and rear ends of the vertically extending portions 32a of the left and

right side walls

32L, 32R) Not provided. Hereinafter, the front and rear end portions of the patch 30 are also referred to as non-welded portions. In FIG. 4, reference numeral 30 N indicates a non-welded portion of the patch 30.

<Assembly method of body frame>
In the embodiment, the assembling method of the vehicle body frame 2 (see FIG. 2) combines a first step of manufacturing the front side frame, a second step of manufacturing the rear side frame, and the front side frame and the rear side frame. And the third step.

Referring to FIG. 2, in the first step, the front end of the front inclined portion 21 a of the main frame 21 in which the patch 30 is connected to the head pipe 20 and the upper end of the lower frame 22 are joined by welding. The front gusset 25 is joined to the front of the front inclined portion 21 a and the upper portion of the lower frame 22 by welding. Further, the lower gusset 27 is joined to the lower portion of the rear side inclined portion 21b of the main frame 21 by welding.
In the second step, the rear ends of the left and right seat frames 23 and the rear ends of the left and right seat sub frames 24 are joined to the rear frame 26 by welding.
In the third step, the front end portions of the left and right seat frames 23 are joined to the left and right

side wall portions

32L and 32R (see FIG. 5) of the patch 30 by welding, and the front end portions of the left and right seat sub frames 24 are joined to the lower gusset 27 by fastening. .
The vehicle body frame 2 is completed by the above steps.

Therefore, when the front side frame manufactured in the first step and the rear side frame manufactured in the second step are joined together by welding in the third step, the patch 30 is used. Since the front end portions of the left and right seat frames 23 are welded to the bent portions 21c of the main frame 21, a frame assembly in which a plurality of members are welded (specifically, the main frame 21 and the left and right seat frames via the patches 30) The heat input associated with welding to the combined body with 23) is suppressed. Therefore, the residual stress is not released, and the occurrence of spring back can be suppressed.

As described above, the vehicle body structure of the motorcycle 1 of the above embodiment includes the main frame 21, the left and right seat frames 23, and the patch 30 coupled to the main frame 21 and the left and right seat frames 23, The welded portion 23w of the left and right seat frames 23 to which the patch 30 and the left and right seat frames 23 are joined is provided in the patch 30, and the left and right seat frames in the patch 30 are A joint 31 h to which the patch 30 and the main frame 21 are joined is provided at a site different from the weld 23 w.

According to this configuration, heat input to the main frame 21 can be suppressed when the left and right seat frames 23 are welded, as compared to the case where the left and right seat frames 23 are directly welded to the main frame 21. Therefore, it is possible to suppress the occurrence of spring back in the coupled state of the main frame 21 and the left and right seat frames 23 via the patch 30. That is, it is possible to suppress the return of the bent portion 21c of the main frame 21 obtained by bending a square pipe made of a high tension material (high tensile steel) by press forming. Therefore, it is possible to reduce the number of steps for securing the dimensional accuracy of the entire vehicle body frame, and easily predict or adjust the amount of springback associated with the residual stress.

For example, when welding the main frame 21 and the left and right seat frames 23 via the patch 30, it is sufficient to predict or adjust only the amount of springback of the combination of the main frame 21 and the patch 30 (the front side frame). In addition, by providing the coupling portion 31h where the patch 30 and the main frame 21 are coupled to each other at a portion different from the welding portion 23w with the left and right seat frames 23 in the patch 30, the outer peripheral edge of the patch 30 which is particularly susceptible to stress. Can be deformed with respect to the main frame 21 so that the stress applied to the main frame 21 can be released.

In the embodiment, the front end portion of the patch body 31 is provided with a notch 31i that is recessed rearward, thereby reducing the weight of the patch 30 while securing a welding length with the left and right seat frames 23L and 23R. Can.

Further, in the above embodiment, the first frame 21 is the main frame 21 to which a plurality of members are welded, so that the plurality of

members

20, 22, 25, 27, 30 (in the embodiment, the head pipe 20, the lower Even in the main frame 21 in which the internal stress (springback amount) particularly easily occurs due to individual differences (welding differences etc.) of the frame 22, the front gusset 25, the lower gusset 27 and the patch 30), the left and right seat frames 23 are welded Heat input can be suppressed. Therefore, it is preferable because the number of steps for securing the dimensional accuracy of the entire body frame can be reduced, and prediction or adjustment of the amount of spring back accompanying residual stress can be easily performed.

Further, in the above embodiment, the welded portion 21w1 of the main frame 21 to which the patch 30 and the main frame 21 are coupled is provided all around the coupling portion 31h, thereby providing a welded portion locally to the coupling portion 31h. As compared with the case where the connection portion 31 h is applied, it is possible to suppress the application of stress to the local portion of the connection portion 31 h.

Further, in the above embodiment, the patch 30 is provided with the folded back portion 32 c so that the welded portions 23

w

1 and 23 w 2 of the welded portions 23 w of the left and right seat frames 23 are positioned on different surfaces. Since the welds 23w1 and 23w2 of the seat frame 23 can be shifted from the same plane, the mounting rigidity can be enhanced.

In the above-mentioned embodiment, although the example which gave the 1st frame the main frame 21 by which a plurality of members are welded was mentioned and explained, it does not restrict to this. For example, the first frame may be another frame such as the lower frame 22 and the rear frame 26. That is, in the first frame, a plurality of members including the patch may be welded.

Moreover, although the said embodiment gave and demonstrated the example which the 2nd flame | frame is the left-right seat frame 23, it does not restrict to this. For example, the second frame may be another frame other than the left and right seat frames 23. That is, the weld of the second frame may be provided on the patch coupled to the first frame.

Moreover, although the said embodiment gave and demonstrated the example which provided the notch 31i hollow toward back at the front-end part of the patch main body 31, it does not restrict to this. The rear end portion of the patch body 31 may be provided with a notch that is recessed forward. That is, at least one of the front and rear ends of the patch 30 may be provided with a notch. For example, by providing notches on both the front and rear ends of patch 30, compared with the case where notches are provided on only one of the front and rear ends of patch 30, welding length with left and right seat frames 23L and 23R is secured. At the same time, the patch 30 can be further reduced in weight.

Further, in the above embodiment, the welded portion 23w1 of the vehicle width direction inner portion 23u of the upper portion of the left and right seat frames 23L, 23R is provided above the vertically extending portion 32a of the left and right

side wall portions

32L, 32R. But it is not limited to this. For example, as shown in FIG. 7, the patch 30 may be provided with a continuous surface 33a for the left and right seat frames 23L and 23R. The patch 30 is formed with a notch 34 for providing the continuous surface 33 a.

As shown in FIG. 8, in the present modification, a second left and right extending portion 33 extending outward in the vehicle width direction from the upper end of the vertically extending portion 32a to the top of the left and right seat frames 23L and 23R is further provided There is. The continuous surface 33 a corresponds to the upper surface of the second left and right extension 33. In this modification, a welded portion 23w1 of the upper portion of the left and right seat frames 23L, 23R is provided at the outer end portion in the vehicle width direction of the second left and right extension portions 33 in the left and right

side wall portions

32L, 32R.

In this modification, the patch 30 is provided with the continuous surface 33a for the left and right seat frames 23L and 23R, so that the separation between the patch 30 and the left and right seat frames 23L and 23R (between the patch 30 and the left and right seat frames 23L and 23R) Since it is possible to suppress the formation of gaps, welding strength can be improved. In particular, when the left and right seat frames 23L and 23R are formed as a round pipe, the above-mentioned separation easily occurs, which is preferable in improving the welding strength.

Further, in the present modification, since the notch 30 for providing the continuous surface 33a is formed in the patch 30, the continuous surface 33a can be configured using a part of the patch 30, so The number of parts can be reduced as compared with the case where a new member is separately provided to form the surface 33a.

The present invention is not limited to the above embodiment. For example, the saddle-ride type vehicle includes all the vehicles on which the driver straddles the vehicle body, and motorcycles (motor bike and scooter type vehicles Not only vehicles with three wheels (including one wheel and two wheels, but also two wheels and one wheel) are included. The present invention is applicable not only to motorcycles but also to four-wheeled vehicles such as automobiles.

The engine according to the embodiment is an engine provided with the cylinder portion 12 (front inclined cylinder) projecting forward and upward, but may be an engine provided with a cylinder portion (rear inclined cylinder) projecting rearward and upward. Further, the engine is not limited to a so-called horizontal engine in which the crankshaft is aligned in the vehicle width direction, but may be a so-called vertical engine in which the crankshaft is aligned in the vehicle longitudinal direction. It is various. Furthermore, the power unit 10 may include an electric motor as a drive source.

The configuration in the above embodiment is an example of the present invention, and various modifications can be made without departing from the scope of the present invention, such as replacing the components of the embodiment with known components.

1 Motorcycles (saddle type vehicles)
20, 22, 25, 27, 30 multiple members 21 main frame (first frame)
21c bent portion 21w, 21w1, 21w2 Welded portion of main frame (welded portion of first frame)
23 Seat frame (second frame)
23w, 23w1, 23w2 Welded part of seat frame (welded part of second frame)
30 patch 31 h joint portion 31i notch 32 c turnback portion 33 a continuous surface 34 notch

Claims

The first frame (21),
A second frame (23),
A patch (30) coupled to the first frame (21) and the second frame (23);
The patch (30) is coupled to a bend (21c) of the first frame (21),
A welded portion (23w) of a second frame (23) to which the patch (30) and the second frame (23) are coupled is provided on the patch (30);
The patch (30) is provided with a joint (31h) to which the patch (30) and the first frame (21) are coupled at a site different from the weld (23w) of the second frame (23) The body structure of a saddle-ride type vehicle.
The body structure of a saddle-ride type vehicle according to claim 1, wherein the first frame (21) is a main frame (21) to which a plurality of members (20, 22, 25, 27, 30) are welded.
The welding portion (21w1) of the first frame (21) to which the patch (30) and the first frame (21) are coupled is provided all around the coupling portion (31h). The body structure of the saddle-ride type vehicle according to 2.
The welded portion (23w) of the second frame (23) includes a first welded portion (23w1) and a second welded portion (23w2),
The patch (30) is provided with a turn-up portion (32c) such that the first welded portion (23w1) and the second welded portion (23w2) are positioned on mutually different surfaces. The body structure of a saddle-ride type vehicle according to any one of the preceding claims.
The body structure of a saddle-ride type vehicle according to any one of claims 1 to 4, wherein the patch (30) is provided with a continuous surface (33a) with respect to the second frame (23).
The body structure of a saddle-ride type vehicle according to claim 5, wherein the patch (30) is formed with a notch (34) for providing the continuous surface (33a).