JPS59130789A - Frame structure of motorcycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a frame structure for a motorcycle that facilitates joining an upper frame and a lower frame.

Generally, motorcycles use pipe frames, but the assembly of this pipe frame involves assembling parts into several blocks, then fixing these blocks in position with a positioning jig and joining them together. It is said to be a method. For example, an upper frame made by joining a main frame member to a hend pipe and a lower frame made by joining a rear fork bi-hot plate to a down pipe are fixed in position using a positioning jig, and their joints are joined together. to form a so-called double cradle frame,
The whole is assembled by joining a rear frame formed by joining a rear frame member and a rear stay to the rear part of this frame.

However, in the above assembly, the head pipe is inclined toward the rear of the vehicle at a predetermined angle, while the axis of the downwardly curved rear end of the main frame member joined to the rear of the head pipe is normally Since it is not parallel to the rear tilt angle, the lower frame is fixed in position using a positioning jig, and the head pipe of the Atsuba frame is fitted into the positioning jig, and the upper frame is lowered along the axis of the head pipe to separate the upper frame and lower frame. When the main frame members are brought into contact with each other, the axis of the rear end of the main frame member does not coincide with the downward direction of the upper frame.

Therefore, the rear end of the main frame member interferes with the hole when attaching the main frame member to the rear end of the down pipe opened in the ψ+ direction, making it difficult to fit the main frame member into the plate. For this reason, in the past, the main frame member was inserted into a hole by bending the main frame member, which significantly impeded assembly workability.

The present invention has been made in view of the above circumstances, and is formed by joining an upper frame formed by joining a main frame member to a head pipe, and a lower frame formed by joining a rear fortabi pot plate to a down pipe to a body. In the frame structure of a motorcycle, a diagonal notch having a surface parallel to the inclination of the hem pipe is formed at the end of the main frame member, and when assembling the frame, the lower frame is positioned with a positioning jig. On the other hand, place the head pipe of the lower frame in the positioning jig, fit the diagonally formed part of the rear end of the main frame member into the mounting hole of the rear fork pivot 1, and connect the upper frame and lower An object of the present invention is to provide a frame structure for a motorcycle that can improve the workability of one assembly by mutually joining the frames.

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 3, a pipe frame 1 includes an upper frame 2o constituting the upper front part of the vehicle body, a lower frame 3o constituting the lower front part of the vehicle body, and a rear part of the vehicle body. It consists of a rear frame 4o that constitutes this.

These sub-assembled blocks are joined together to form the vehicle body.

In the upper frame 20, a pair of left and right main frame members 22 facing diagonally downward are joined to the rear side of a head pipe 2T that slopes toward the rear of the vehicle body in a substantially triangular shape with the head pipe 21 as the apex, and the rear ends of both main frame members 22 22a is curved downward. The left and right main frame members 22 are connected and reinforced by a cross member 23, and a pair of fuel tanks 24 are attached to the upper part of the member 22, and a pair of diagonal members are attached to the lower part of the member 22 to connect with the lower frame 1130. 25 is installed and the upper frame 2
A block of 0 is formed.

In the lower frame T130, a pair of left and right down pipes 31 curved upward are connected to each other by cross members 32 and 33, and a pair of left and right rear fork pivots 1 to 1-34 are attached to the rear ends of the nine down pipes 31. The upper ends of each of the rear fork pihonos 1 to the plates 34 are formed in a bifurcated shape, and each end face has a main frame member insertion hole 34a into which the rear end 22a of the corresponding main frame member 22 of the upper frame 20 is fitted. The rear stay 46 of the rear frame 40, which will be described later, is fitted to the hole 34b and the pivot plate 34 that pivotally supports the rear frame on the side.
It has c. Also, at the bottom of the left and right down pipes 31, there is a pair of engine collars 35, and the left down pipe 31
Engine hanger plate I-36, sight stand bracket 37, etc. are placed on the bottom of the lower frame A.
A block of s 30 is formed.

The rear frame 40 includes a pair of left and right rear frame members 4 extending rearward, a cross member 42° 43, 44, 45 that connects and reinforces both rear frame members 41, and a lower portion of the left and right rear frame members 41. A block of the rear frame 40 is formed by the joined left and right side edges 46.

In addition, the rear frame member 41 bends the middle part inward to narrow [1] between both members 41, and the bent part 41a of both members 41 is shifted back and forth to enlarge the minimum width of the left-right asymmetric binding narrow part. are doing. A side grip 47 can be attached to the rear frame 41 on the left side.

The blocks of the upper frame 20, lower frame t130, and rear frame 40 formed as described above are assembled in the following manner. FIG. 4 is an explanatory diagram of the assembly of the anopa frame 20 and the lower frame 30. As seen in the figure, the axis A-A of the head vibrator 21 is tilted backward at a backward tilt angle α, while the main frame member 22 is downwardly tilted. The axis B--B of the rear end portion 22a, which is curved as shown in FIG. Therefore, if the rear end 22a of the main frame/member 22 is formed with an end face perpendicular to the axis as in the conventional case (indicated by a broken line), the upper frame 4.20
from 1 position to 1 along the axis A-A of the head pipe 21.
When lowering the main frame member 1-34 to the rear end of the lower frame 30, which is held in position with a positioning jig (not shown), the rear end of the main frame member 22 is attached to the edge of the hole 34a. The end face perpendicular to the axis of the portion 22a interferes, making it difficult to fit in this state. Therefore, in the present invention, the rear end portion 22a of the main frame member 22 is provided with an obliquely formed portion 22b formed along a plane A'-A,' which is substantially parallel to the axis A-Δ of the head vibrator 21 and the rearward angle α. put.

In this way, the blocks of the lower frame 30 are fixed in position at least at the left and right rear fork pivots (plates 34) using the aforementioned positioning jig (not shown), while the head pipe 21 of the lower frame 20 is fixed in position using another positioning jig (not shown). (No), and lower the entire upper frame 20 along the axis A-A of the head pipe 21 from the T position to the (2) position, which is the joining position. At this time, the rear end 22a of the main frame member 22 forms an obliquely formed portion 221 having a plane A'-A' substantially parallel to the rearward angle α of the head pipe 21, so the rear end 22a of the main frame member 22 The main frame member of the fork vibon plate 1-34 can be attached to the portion 22a easily as shown in the figure without interfering with the hole 34a. In this way, the main frame member 22 and the rear fork pivot plate 34 are attached by welding around the hole 34a, and also by welding the contact portion between the diagonal member 25 of the upper frame 20 and the down vibe 31. The upper frame 20 and lower frame 30 are joined together to form a so-called double cradle frame.

FIG. 5(A) shows a conventional joint between the main frame member 22 and the rear fork pivot plate 3, 1 in which the rear end surface of the main frame member 22 of the upper frame 20 is a plane perpendicular to the axis; Conventionally, the rear fork pivot is generally fitted externally! - To attach the main frame 11 member of the plate 34, form an ear portion 34cl on the gla R of the bow 34a.
, the average wall thickness on the cross section of the joint from the main frame member 22 to the rear forter pivot 1-plate 3.
The stress can be dispersed by changing the stress gradually toward the overlapped portion with No. 4. However, even with this method, the stress can be dispersed at the upper part of the hole 34a where the ear part 34d is formed. Step-like changes are unavoidable and stress concentration tends to occur.

FIG. 5(B) shows a frame structure of the present invention in which an obliquely formed portion 22b is formed at the rear end of the main frame member 22 and the rear fork pivot plate 34 is connected to the mounting hole 34a1. In this case, due to the obliquely formed portion 22b of the main frame member 22, the change in the average wall thickness on the cross section of the joint due to the overlap with the externally fitted rear fork pivot plate 34 is moderated, and the stress is dispersed. can do.

In addition, as shown in FIG. 5(C), the main frame member 2
2 is provided with an obliquely formed portion 22b, and the edge of the main frame 11 member mounting hole 34a (3 ear portion 34
By forming d, the change in the average thickness on the cross section of the joint from the main frame member 22 to the rear forter pivot plate 34 becomes more gentle, and stress at the joint can be dispersed.

As shown in the perspective view in FIG. 5(+), the main frame member of the plate 34 is attached to the rear flake pivot 1 using the ears 3/1. formed at the edge of the hole 34a. d is generally installed at a position that is approximately the diameter of the hole 34a, but the inner diameter Ω of the tip of the moon portion 34d may be smaller than the outer diameter of the main frame member 22.

For the upper frame 20 and lower frame 1130 that have been joined as described above, the front ends of the left and right rear frame members 41 of the rear frame 40 are welded to the upper frame f and the left and right main frames 11 of the 20 members 22 near the rear, To install the rear stay of the rear fork pivot plays 1 to 34, fit the front ends of the left and right lever jaws 46 into the holes 34b (by welding the circumference of the pipe flange L34b). Ru.

The front part of the pipe frame l assembled in this way is suspended on the front shaft 3 which is pivotally supported by the front fork 2 which is steerably attached to the head pipe 21, and the rear part of the pipe frame 1 is It is suspended via a rear suspension 6 on a rear shaft 5 which is pivotally supported by a rear fork 4 which is swingably connected to pivots I to 34c of a fork pivot plate 34.

There is a construction on the left and right down pipes 31 of the lower frame 30.
'The exhaust pipe 8 attached to the engine collar 35 and the engine hanger plate 36 through the engine collar 35 and the engine hanger plate 36 and connected to the cylinder on the right side when viewed from the front runs along the lower left side of the vehicle body, and the exhaust pipe 9 connected to the cylinder on the left side when viewed from the front runs along the lower left side of the vehicle body. The exhaust pipe 10, which extends rearward along the left side of the lower part of the vehicle body and is connected to the rear cylinder, avoids the rear suspension part 9126 to the left, detours to the right side of the vehicle body, and extends in two directions to the rear of the vehicle body. It has the same length as the exhaust pipes 8 and 9 connected to the front cylinder, and is arranged so as not to extend much to the rear of the vehicle body.

Hasso 1 - Rear frame member 41 of pipe 21
The fuel tank 11 is removed from the front. The installation of this fuel tank 11 is shown in detail in FIG.
A circular mounting rubber 2/la is fixed to the outer surface of a bracket 24 with a pin 24b for the fuel tanks mounted bidirectionally on the upper surfaces of the left and right main frame members 22. On the other hand, inner walls of the fuel tank 11], ]a, U-shaped engagement pieces], and b facing forward are provided to engage with the mounting lapper 24a, so that the fuel tank 11 can be moved from the rear of the upper frame 20 to the front. Push it to engage the mounting rubber 24a and the engagement piece 11b, and fix the rear part of the fuel tank 1 to the cross member 42 of the rear frame member 4J with screws. FIG. 7(A) shows the attachment of the fuel tank 11 to the main frame member 22.
The fuel tank bracket 24 is fixed to two sides of the main frame member 22 in the -L direction,
The installation of the fuel tank 11 is done in the afterburning tank 11.
a is in contact with the outer surface of the main frame member 22,
The main frame 11 is attached so that its bottom surface is substantially equal to the lower surface of the main frame 22. Therefore, as shown in Figure 7 (B) L: 1, the fuel tank is mounted on the bracket 24.
is fixed downward to the lower surface of the main frame 11 member 22, and the engaging piece +1. In addition, the mounting rack 24a can be mounted on the outer surface of the main frame member 22 as shown in FIG. Unlike the attachment means in which the engagement piece 11b is inserted into the inside of the fuel tank 11, the number of customers in the fuel tank 15 is not reduced.Furthermore, the fuel stopper 12 at the bottom of the fuel tank 11 is attached to the rear of the fuel tank 11. By arranging the bent portion 4 of the frame member 41 at the bent portion 4], a of the frame member 41, lateral protrusion is eliminated and the vehicle is slimmed down.

A seat 13 is attached from the rear of the fuel tank 11 to the rear end of the carrier frame 40. Further, for example, an ignition coil 14 or the like is disposed using the space between the asymmetrical bent portions 41a of the left and right rear frame members 4I.

As explained above, the present invention provides a motorcycle that is formed by integrally joining an upper frame formed by joining a main frame member to a head pipe, and a lower frame formed by joining a rear fork pivot play 1 to a town pipe. In this frame structure, the rear end of the main frame member is formed diagonally with a surface substantially parallel to the inclination of the head pipe, and when assembling the frame, the lower frame is fixed in position with a positioning jig, while the lower frame is fixed in position with a positioning jig. Fit the head pipe into the positioning jig, and
By fitting the diagonally formed portion of the rear end of the member into the rear fork pivot plate I- and joining the joints of the upper frame and lower frame to each other, the upper frame and lower frame can be easily joined and assembled. Work efficiency can be improved.

Note that the frame structure according to the present invention can be applied to both round pipes and square pipes, and the effects are the same.

[Brief explanation of the drawing]

The first is a perspective view of the frame structure according to the present invention, FIG. 2 is a side view of a motorcycle to which the frame structure according to the present invention is applied, FIG. 3 is a top view of the same, and FIG. The assembly explanatory diagram, FIG. 5, is a diagram showing a comparison between the frame joint according to the present invention and a conventional frame joint.
B) and (C) show frame joints according to the invention,
Figure 6 is a perspective view showing the installation of the fuel tank, Figure 7 <A
), (B), and (C) are diagrams showing means for attaching the fuel tank, respectively. 1... Pipe frame, 20... Upper frame 11
．． 21... Hen 1~pipe, 22... Main frame member, 22b... Diagonal forming part, 30... Lower frame, 31... Down pipe, 34... Rear fork pi hot plate, 40・・Rear frame. Procedural amendment (voluntary) June 260, 1980 Kazuo Wakasugi, Commissioner of the Patent Office 1, Indication of the case Patent 1 + 2 filed on January 18, 1988, Title of invention Frame structure of motorcycle 3, Amendment Relationship with the case of the person who filed the patent application Patent applicant address: 6-27-8 Jingumae, Shibuya-ku, Tokyo Name (5
32) Honda Motor Co., Ltd. Representative Kawa
Shima G Yoshi 4, Agent address Tokyo F; ++ Sunshine Koken Plaza 30, 3-2-1 Higashiikebukuro, Toshima-ku +, R3 170 Phone number 03 (983) 0926 (Representative) Name Patent attorney (8)
18g) Toshihiko Watanabe application form, duplicate copy, Ming x.
+a Engraving of shoes and drawings (no changes in content) as attached. Procedural amendment (spontaneous) March 1, 1980, Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office■, Small case indication 1982, Patent Application No. 006383 2, Title of invention: Motorcycle frame structure 3, amendment Relationship with the case of the person who filed the patent application Patent applicant address: 6-27-8 Jingumae, Shibuya-ku, Tokyo Name (5
32) Book [Representative of JI Giken Kogyo Co., Ltd.
Yoshiyoshi Kawashima 4, Agent address: 3-1 Higashiikebukuro, Toshima-ku, Tokyo] 2-4-3 Sunshine Ink Ichiken Plaza 301/5, Subject of amendment (1) Claims column of the specification (2) Specification Column for detailed explanation of the invention in the book (3) 4 or 6 for a simple explanation of the drawings in the specification
Contents of the amendment The engraving specification based on the written amendment dated January 26, 1981 (+) The amendment will be made as per the appendix in the scope of claims of the specification. (2) Detailed description of the invention in the specification (a) The second line from the bottom of page 3 of the specification: “The mainframe member
-” from page 21, line 5 from the top, “・notorii” in the hole.”
The rear end of the main frame member is formed diagonally with a surface substantially parallel to the inclination of the head pipe, the frame is assembled, the lower frame is fixed in position with a positioning jig, and the upper frame is fixed in position with a positioning jig. While fitting the head pipe No. 11 into the positioning jig, insert the diagonally formed part of the rear end of the main frame member into
- on the plate”. ) Correct "Townpaup 31" on the top of page 5 or in line I'l IO to "Downpipe 31". . c) Delete ", (indicated by a broken line)" in the fifth line from the top of page 7. 2) In the 5th line from the top of page 8, ``Oume'' is amended to ``Ome''. e) 12th line from "Page 9" - "Distribute q!"
It is corrected as "to disperse the ) On page 11, two lines from the bottom, change ``1 along the left side'' to ``
Along the right side, correct it. g) From page 13 of the same page, line 6, "Fuel tank 15" is corrected to "Fuel tank 11." h) From the 610th line of the top of the same page, ``The main frame member'' to the 11th line from the bottom of the same page, ``The joint of...'' Obliquely formed with a surface substantially parallel to the inclination of the pad pipe,
In assembling the frame, the lower frame 71 is fixed in position using a positioning jig, and the diagonally formed portion of the rear end of the front main frame member is fitted into the positioning jig. Fits into the fork bipot 1-plate and corrects the upper frame and lower frame. (3) Column for a brief explanation of the drawings in the same specification (a) In the seventh line from the top of page 15 of the same specification, "Fig. 5 is" is replaced with "Fig. 5 (A
), (B), and (C) are corrected as ``. Between the 10th line from the top of page 15, ``shows,'' and the 11th line from the top of the same page, ``Figure 13 is'', ``Figure 5 (D) shows some examples of mainframe members with old Perspective view of the hole,
Insert. The upper frame is made by joining the main frame members to the spatula 1-pipe, and the down pipe is straight I-fu 2r
In the frame structure of a motorcycle formed by integrally joining a lower frame consisting of a main frame member 1 and a lower frame, the rear end portion of the main frame member is approximately aligned with the inclination of the pipe. After assembling the frame, the lower frame is fixed in position with a positioning jig, and while the lower frame of the assembling frame 11 is fitted into the positioning jig, the rear end of the main frame 11 is fitted into the positioning jig. A frame structure for a two-axle automatic vehicle, characterized in that an obliquely formed part of the part is fitted into a rear fork pivot plate, and an upper frame and a lower frame are fitted to each other. "that's all

Claims (1)

[Claims] 1. An upper frame made by joining the main frame member to the hend pipe, and a lower frame made by joining the rear fork pivot 1-play 1- to the down pipe.
- In the frame structure of a motorcycle that is formed by joining to the body, the rear end of the main frame member is formed diagonally with a surface substantially parallel to the inclination of the head pipe, and when the frame is assembled, the lower frame is assembled. While fixing the position with a positioning jig, while fitting the head pipe of the amplifier frame into the positioning jig, attach the diagonally formed part of the rear end of the main frame member to the rear flake.] Play 1
Frame 13 of a motorcycle characterized by fitting into ... and joining an upper frame and a lower frame to each other J
Notice.