JPS58194680A - Shaft drive device for 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 shaft drive device for a two-wheeled motor vehicle.

The applicant of this application has previously developed a device of this type in which the output shaft of an engine mounted in the middle of a vehicle body having front and rear wheels is connected in the axial direction of a propeller shaft in a shaft cover extending rearward and a cam-type torftor on the shaft. We propose a system in which the hydraulic arm that buffers the forward and backward movements of the lifter is used to prevent the self-excitation of the lifter from moving to the floor. However, in this case, the temperature of the oil in the hydraulic dan d increases due to its operation, and it is desirable to provide an oil cooling means.

The object of the present invention is to provide a device with a simple structure that satisfies such demands. - Connected to the input shaft connected to the rear wheels via a circular propeller shaft and a cam-type torque damper on the shaft; and a ventilation gap between the torque damper on the shaft and the outer periphery of the case and the cover. The air conditioner is characterized in that a ventilation hole is formed in the cover to guide the outside air with the ventilation amount @lfc.

Next, an example of implementing the present invention will be explained in a separate sheet.

In the drawing, (11) indicates the body of a two-wheeled motor vehicle, and (11) includes front and rear wheels (2), (3) and an engine (4) in the middle, as shown in FIG. The output shaft (5) of (4) is connected to the propeller shaft (7H7) extending inside the shaft cover (6) consisting of a rear fork that supports the rear wheel (3) as shown in Fig. The input shaft (9) connected to the rear wheel (3) is connected to the input shaft (9) via a cam-type torque converter (8).
is composed of a pinion shaft that extends forward integrally from the pinion (Lυ) that is connected to the rear wheel (3) O wheel knob (3 m) via the bevel gear Ql via the dorison 2 engine (3b). O Mukuro Torque Dan A (6) is 01mm-v6mm (8m) on the rear side.
) and this is pressed by spring (8b)'#! JIII lifter (8C).
) fell in the axial direction on the propeller shaft (7) 111
At the same time as engaging the stripe line in the 111 space, sales Dan 79
The cam (8m) is connected to the input shaft (9) via the joint α on the outer periphery of its rear end, and the relative rotation between the cam (8&) and the lifter (8c) due to torque fluctuations As shown by the dotted line in Fig. 4, the armpit lifter (8@) is pushed by the cam (8&) and moved forward in the axial direction against the spring (8b), which causes the shift torque to fluctuate. In addition, a hydraulic damper (1st) was provided on the propeller shaft 7 (7) to dampen the movement of the lifter (89) in the axial direction.

In this case, the hydraulic damper A (J) can be installed separately from the torque machine No. It was constructed as follows.

On the contrary, the propeller shaft (7) has a lot of torque (
The outer case α which extends around the outer circumference of 8) and oil-tightly encloses the 0 part is attached so as to rotate together with the outer case 71.1 (8).
An orifice hole αω passing through in the axial direction is formed in c), and the hole 7 (8c) is connected to the piston ring (2) on the outer periphery.
This hydraulic damper a is brought into sliding contact with the case α through the
The second piston was designed to double as the third piston.

Although the above is not particularly different from the above-mentioned proposal of Nine Nine, according to the present invention, a ventilation gap a'6 is provided between the outer periphery of the outer case I of the hydraulic arm Q3 and the shaft cup (6). A ventilation hole for introducing outside air to the ventilation gap (lη) was formed in the shaft cutter (6).

In the illustrated example, a pair of vertical ventilation holes are formed in the front and rear, and spiral fins are protruded from the outer periphery of the outer case α as shown in FIG. According to the rotation of the outer case α with the rotation of
Air was actively blown towards the area.

In the drawing, (2) shows the ventilation hole (Ifj KII!! It is also possible to abbreviate it to 121.

Next, to explain its operation, when the lid (8G) moves forward and backward in the axial direction due to torque fluctuation, the kinetic energy is due to the buffering effect of the hydraulic damper I, that is, the buffering effect due to the viscous resistance of the oil flowing through the orifice hole (c). yo) absorbed,
Due to large torque fluctuations caused by sudden deceleration, the lid may be damaged (8c).
) self-oscillation IhJJ is reliably prevented, and this OI
The oil inside the outer case α rises, but the outside air flows into the outer circumference of the outer case Q40 and the ventilation gap αη. Forming a ventilation hole in the threshold between the outer case and the shaft cover 9 is sufficient by forming a ventilation hole in the cover, which has the effect of simplifying the structure and obtaining it at a low cost.

4 Figure mow simple m @ 1tii1 is a side view of an example of a two-wheeled motor vehicle equipped with the original 1jli side mounting, Figure 2 is a cutaway plan view of the supporting part, Figure 3
The figure is a perspective view of the main part, and 4E is a diagram explaining the operation of the torque damper z4.

(1)...Vehicle body (2)...Front wheels (
3)...Rear wheel (4)...Engine (
5)...Output shaft (6)...Shaft cag-(7)
...Propeller shaft (8) ...Torque damper (
8c)...Lifter (9)...Input shaft (1[
Yes]...Hydraulic arm arm α...Outer case a...H between ventilation holes...2 people outside the ventilation hole

Claims (1)

[Claims] The output shaft of an engine mounted in the middle of a vehicle body with front and rear wheels is connected to the input shaft connected to the rear wheels via a propeller shaft inside a shaft cover that extends rearward and a cam-type torque damper on the shaft. A hydraulic damper is provided on the shaft to buffer the forward and backward movement of the torque damper in the axial direction, and a ventilation gap is provided between the outer case of the hydraulic damper and the blade cover. A shaft drive device for a two-wheeled motor vehicle, characterized in that a cover is formed with a ventilation hole for guiding outside air into the ventilation gap.