JPS59195481A - Mounting structure of rear fork - 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 mounting structure for a rear fork of a motorcycle, particularly a propeller shaft driven motorcycle.

In a propeller shaft-driven motorcycle that transmits engine output to the rear wheel through a propeller shaft, the propeller shaft is pushed through a pipe on one side of the rear fork that supports the rear wheel, and one end of the propeller shirt 1- There is a structure in which the propeller shaft is connected to the rear wheel shaft via a gear, the other end is connected to the output shaft of the engine via the gear, and the driving force of the engine is transmitted to the rear wheels via this propeller shaft. In a two-axle automatic vehicle with such a structure, a stud bolt is attached to one end of the pipe on the side where the propeller shaft of the rear fork is inserted into the gear case that houses the gear that connects the output shaft of the engine transmission and the propeller shaft. It is necessary to attach the other nozzle end through which the propeller shaft is not inserted to the side of the engine crankcase, and to attach the rear fork to the engine crankcase so that it can rotate freely. In such a structure, one pipe of the rear fork must be assembled from the rear of the engine and the other pipe from the side of the engine, resulting in a problem that the rear fork is not easy to assemble.

The present invention has been made in view of the above points, and an object of the present invention is to improve the ease of assembling a rear fork to an engine. In order to achieve this object, in the present invention, a propeller shaft is inserted into a pipe on one side of a rear fork whose both ends are swingably attached to the engine crankcase, and the propeller shaft connects the output shaft of the engine to the rear wheel. In the rear fork mounting structure of a propeller shaft for connecting a propeller shaft +-i dynamic motorcycle, a pivot holder is fixed to the other pipe end through which the propeller shaft is not inserted, and the pivot holder is moved in the longitudinal direction of the propeller shaft when the rear fork is attached or detached. The pivot holder is made possible to be attached to the crankcase, and a fork taking structure is provided.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show an embodiment of a propeller shaft driven motorcycle to which the present invention is applied. In FIG. is fixed to the center of the frame body 3.
A front fork 6, which suspends a front wheel 5, is pivotally supported on the hend pipe 1 of the vehicle.

Each cylinder of the engine 2 is connected to a carburetor 8 from a fuel tank 7.
Exhaust pipes 9 and 10 connected to each cylinder are communicated with each other in an exhaust chamber 11 disposed at the rear lower part of the engine 2.
A muffler 12 is connected to the muffler 1.

A step bracket 1 attached to the side of the vehicle; a rear fork 15 that supports the rear wheel 14 on the inside of the bracket;
As detailed later, the crankcase 2 of engine 2
It is swingably connected to a.

A shock absorber 1 that cushions and supports this rear fork 15 is provided.
6 is interposed between the fork 15 and the frame 11 body :).

FIG. 2 shows a cross-sectional view taken along the line ■-■ in FIG. 19. It is connected to the countershaft 21 via 20.

The countershaft 21 is connected to a transmission main shaft 22 via a speed change gear, and this main shaft 22 is connected to an output shaft 23 of the transmission gear 9.
and are connected via gears 24 and 25.

A bevel gear 23a formed at the left end of the output shaft 23 and one end 26a of the propeller shirt 1 inserted into the left side pipe 15a of the rear fork 15 are connected to a connecting shaft 28 disposed in the gear case 27 and They are connected via a bevel gear 29, and the other end of the propeller shaft 26 is connected to the rear @14 via bevel gears 30, 31, etc.

3 and 4 are enlarged views of the main parts of FIG. 2, showing details of the rear fork mounting structure of the present invention, and FIG. 4 is a line I in FIG. 3.
It is a V-mV cross-sectional view.

The gear case 27 has a bearing 32 and an oil seal 3 on one side of the crankcase 2a of the engine 2, for example on the left side.
3, the shirt 1-holder 34 is rotatably fitted and supported via an O-link 35, and is fixed to the shirt holder 34 by an unillustrated port I. A connecting shaft 28 is rotatably supported in the gear case 27 by bearing links 36 and 37, and a hevel gear 29 is externally fitted and fixed to the connecting shirts 1 to 28 by spline connection. This bevel gear 29 penetrates the center of the shaft holder 34, and is integrally connected to the left end of the output shaft 23, which has one end supported by a bearing 38 and the other end supported by a bearing 39 disposed inside the crankcase 2a. Bevel gear 2 formed in
3a meshes with A. The gear case 27 is rotatably supported on the crank case 2a via the shaft holder 34. Therefore, the connecting shirt 1-28 can rotate together with the gear case 27 about the axis of the output shirt 1-23 while being meshed and connected to the output shirt 1-23.

The left side mounting portion +5L of the rear fork 15 has a joint boot 40 that is fitted and attached to the tip of the left side pipe 15a, and the flange 40a of this joint boot 4o is screwed and fixed to the rear end of the gear case 27. It is fixed to a stud bolt 41 with a nut 42. The end portion 28a of the connecting shaft 28 and the tip portion 26a of the propeller shaft 26 are connected by a spline connection at a propeller shaft joint 43.

The right side mounting portion 15R of the rear fork 15 has a substantially cylindrical pivot holder 44 fixed to the tip of the right side pipe 15h of the rear fork 15, and the outer race of the bearing 45 fitted inside the pivot holder 44 is attached to the pivot holder. Dislodgement is prevented by a flange 44a and a circlip 46 that protrude inward at one open end of 44. A pivot holder support member 47 is attached to this bearing 45.
The inner race of the bearing 45 is screwed onto the tip of the shaft portion 47a.
48 and then take the support member 47 to the pivot holder 44.
It is made so that it does not come off from the shaft portion 47a of No.7. That is, the pivot holder 44 and the support member 47 are rotatably supported by each other.

As shown in FIG. 5, a plurality of locking holes 47c, for example four, are bored in the flange portion 47) of the pivot holder support member 47, which is formed in a continuous manner with the shaft portion 47a. A bolt 49 is attached to the screw 6 of a boss 2b (FIG. 3) that is integrally formed with the crankcase 2a on the right side of the crankcase 2a and at a position facing the end of the output shaft 23.
The flange portion 47I) is inserted through the locking hole 47c at 11
The output shaft 23 and the shaft portion 47a are fixed and aligned on the same straight line. Reference numerals 50 and 51 are arranged on the sides of both end faces of the bearing 45, respectively.
5 is a mail seal for liquid-tight sealing, and 52 is a holder cap that closes the open end of the pivot holder 44.

The rear fork 15 having the left and right mounting portions 1.5L, ], 5R described above is attached to the crankcase 2 of the engine 2.
a, in the left side mounting portion 15L, the flange portion 40a of the joint boot 40 is screwed onto the rear end of the gear case 27 from the rear of the engine 2, that is, from the direction of the arrow A in FIG. Bolt 41 and Nara 1-
Tighten and fix with 42. On the other hand, in the right side mounting part], 5R, the flange part 4.7 of the pivot holder support member 47 supported by the pivot holder 44 from the arrow A direction.
b is aligned with the boss 2b of the crankcase 2a, and the pivot holder support member 47 is fastened and fixed to the crankcase 2a from the side with bolts 49. Therefore, both of the left and right mounting portions (=1 part 1.5 L, 5R) of the rear fork 15 can be mounted from the rear direction of the vehicle body as indicated by the arrow A.

Also, at this time, the shaft 7 portion 47a of the right side mounting portion 1.5R is installed in alignment with the axis of the output shaft 23, so the right side pipe 15b of the rear fork is aligned with the axis of the output shaft 23. while the left pipe],
Since the gear case 27 to which the rear fork 5a is fixed also rotates around the output shirts 1 to 23 as described above, the rear fork 15 can swing without any problem.

FIG. 6 shows a partially cutaway top view of the second embodiment of the present invention, and FIG. 7 shows a cross-sectional view taken along line 1--2 in FIG. In this embodiment, the pipe 1 on one side of the rear fork 15, for example, the right side
The pivot holder 44', which is fixed to the end of the pivot bolt support member 47, is divided into two parts 44'a and 44'b, the front and rear parts at the center, and is fitted onto the shaft part 47a of the pivot bolt support member 47. Both parts 44'a and 44' are marked on the outer race of the bearing 45 whose race is fixed with a nut 48.
b are fitted and mounted from both the front and rear sides, respectively, and tightened with bolts 53.

This embodiment can be applied to the fork right side A' section 15R
When attaching to the crankcases 2a of two engines, first, move the pivot holder support member 47 to which the bearing 45 is attached using the nuts 1 to 48 so that its shaft portion 47a is aligned with the axis of the output shirt 1-23. bolt 4
9) is fastened to the right side of the crankcase 2a, and then a pivot holder whose approximately central portion of its outer circumference is fixed to the end of the right side pipe 1.5b from the direction of the arrow A in Fig. 3. 4
The rear part 44'b of the pivot holder 44' is fitted into the outer race of the bearing 45, and the front part 44'a of the pivot holder 44' is fitted into the outer race of the bearing 45.
is fitted into the outer race of the bearing 45 facing the rear portion 44'b, and these front and rear portions 44'a and 44'b are fastened and fixed with the poles 1-53.

In this way, the pivot holder support member 47 can be aligned and attached first, and then the right side of the rear fork 15 can be attached to this support member 47 from the rear of the engine. It will be easier to make inquiries. Note that in the second embodiment, similarly to the first embodiment, the pivot holder support member 47 is first rotatably attached to the pivot 1 to the holder 44', and then the flange portion 47b of the pivot holder support member 47 is attached to the pivot holder support member 47. may be attached to the crankcase 2a of the engine 2.

FIG. 8 shows a partially cutaway top view of the third embodiment of the present invention, and FIG. 9 shows a sectional view taken along line IX-LK in FIG. For example, the end of the output shaft 23 may be made to protrude to the right side of the crankcase 2a, and the end 23b of the protruding shirt 1-23 may be attached to this end 23b as a detail of the Vivoso 1-holder support member. In this embodiment, a pivot holder 44' which can be split apart and tightened similarly to the second embodiment shown in FIGS. 6 and 7 is mounted via a bearing 45. In this third embodiment, since the output shaft 23 itself is used as the rotation center, there is no need to align the respective swing centers of the left and right mounting portions 15L and +15R, which further improves the assembly (=J property). can be achieved.

According to each of the embodiments described above, both the left and right mounting portions 15L, ], 5R of the rear fork 15 can be attached from the rear of the engine 2, and the center of rotation of the rear fork 15 is provided on the crankcase 2a. Therefore, it becomes possible to increase the capacity of the exhaust chamber 11 disposed at the rear lower part of the engine 2.

As described above, in the present invention, the propeller shaft is inserted into the pipe on one side of the rear fork whose both ends are swingably attached to the crankcase of the engine, and the propeller shaft is connected to the output shaft of the engine and the rear wheel by means of the propeller shirt 1-. In the rear fork mounting structure of a propeller shaft driven motorcycle that connects the propeller shaft, a pivot holder is fixed to the other end of the vibe through which the propeller shaft is not inserted, and is movable in the longitudinal direction of the propeller shaft when the rear fork is attached or detached. Since the pivot 1 to the holder are attached to the crankcase, both the left and right attachment parts of the rear fork can be removed from the rear of the engine, thereby improving the ease of assembling the fork. Can be done.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a motorcycle to which an embodiment of the present invention is applied, FIG. 2 is a sectional view taken along line 11-II in FIG. 1, and FIG.
The figure is an enlarged view of the main part of Figure 2, and Figure 4 is the line IV - of Figure 3.
IV sectional view, FIG. 5 is a top view of the right side mounting section shown in FIG. 3, FIG. 6 is a partially cutaway top view of the second embodiment of the right side mounting section, and FIG. 7 is a line -■ sectional view, FIG. 8 is a partially cutaway top view of the third embodiment of the right side mounting portion, and FIG. 9 is a sectional view taken along line 12r-IX in FIG. ■ Motorcycle, 2 Engine, 2a... Crankcase, 2b... Boss, ] 4... Rear wheel, 15. Rear fork, 15L... Left side mounting part, 15 R... Right side mounting part, 23...・Output shirt 1~. 26 ・Propeller shirt 1~. 27... Gear case, 41 - Statpol 1 selection 44. 44'... Pivot holder, 45... Bearing, 47 Pivot holder support member, 47a... Shaft portion, 47b... Flange portion, 49 - Pol 1~. Applicant: Honda Motor Co., Ltd. Agent Patent Attorney: Taku Watanabe Toshihiko, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, Procedural Amendment (Spontaneous) May 24, 1980 Commissioner of the Japan Patent Office Mr. Kazuo Wakasugi 2. Name of the invention Rear fork mounting structure 3. Relationship with the case of the person making the amendment Patent applicant address 6-27-8 Jingumae, Shibuya-ku, Tokyo Name (5
32) Honda Motor Co., Ltd. Representative Kawa
Yoshiyoshi Shima 4, Agent address: Sunshine Koken Plaza 301-6, 3-2-4 Higashiikebukuro, Toshima-ku, Tokyo, Contents of amendment

Claims (1)

[Claims] ■0 A propeller shaft driven automatic that connects the engine's output shaft and the rear shaft by inserting a propeller shaft into the pipe on one side of the rear fork, whose both ends are swingably attached to the engine crankcase. In the rear fork mounting structure for a two-axle vehicle, a pivot holder is fixed to the other end of the pipe through which the propeller shaft is not inserted, and the pivot holder is movable in the longitudinal direction of the propeller shaft when the rear fork is attached or detached, and the pivot holder is attached to the crankcase. A rear fork mounting structure characterized in that a holder is attached.