JPS62113672A - Reserve tank for rear cushion - 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 (Field of Industrial Application) The present invention relates to a reserve tank for a rear cushion mainly applied to a motorcycle.

(Prior Art) Conventionally, in order to increase the oil capacity of the rear cushion, it is known that a reserve tank is provided that is connected to the oil damper tube of the rear cushion, but in this case, what is the difference between the oil damper tube and the reserve tank? It is generally connected by a pipe.

(Problems to be Solved by the Invention) In the above system, the weight of the vehicle increases due to the pipe connecting the oil damper tube and the reserve tank, and the number of parts increases, making it expensive. It is desirable to be able to connect the reserve tank to the oil damper tube.

An object of the present invention is to provide a reserve tank that meets such demands.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a connection port that is recessed in the outer surface of the oil damper tube of the rear cushion and communicates with the oil damper tube of the rear cushion. A protrusion that can be freely fitted is provided in the reserve tank body, an oil communication hole is formed in the protrusion, and an oil passage is formed in the reserve tank body to communicate the oil storage chamber inside the reserve tank body with the oil communication hole. .

(Function) When the reserve tank body is fitted into the connection port of the oil damper tube at the protrusion on its outer surface, the oil will flow through the oil communication hole formed in the protrusion and the oil passage formed in the tank body. The inside of the tube and the oil storage chamber in the tank body are communicated with each other, thus eliminating the need for a pipe for connecting the reserve tank and the oil damper tube.

(Example) Referring to FIG. 1, a indicates a body frame of a motorcycle, and a rear wheel C is connected to the body frame a via a rear fork b.
At the same time, the rear fork b was suspended on the vehicle body frame a via the progressive pull link mechanism d and the rear cushion (1).

As clearly shown in FIG. 2, the rear cushion (1) is equipped with an oil damper tube (2), to which a reserve tank A is connected.

The reserve tank A is connected to the oil damper tube (2) without requiring a separate connection pipe,
To explain this, a stepped hole-shaped connection port (3) that communicates with the inside of the tube (2) is recessed on the outer surface of the upper end of the oil damper tube (2), and the outer surface of the reserve tank body (4) is recessed. A protrusion (5) that can be freely fitted is provided in the connection port (3), and an oil communication hole (6) is bored in the protrusion (5). Internal oil storage chamber (7)
and the oil communication hole (6).
), and by fitting the protrusion (5) into the connection port (3), the oil damper tube (inner The oil chamber and the oil storage chamber (7) are communicated with each other, and in the case shown, the tail end of the protrusion (5) is connected to the outer edge of the connection port (3) from the lower surface thereof. A catch seat (3a) surrounding both sides is extended, and fixing bolts (9) (9) are inserted into both sides of the catch seat (3a) as shown in FIG. ) on both sides of the tail end thereof, and the reserve tank body (4) is fixed to the oil damper tube (2) at the protrusion (5).

The connection port (3) is formed diagonally rearward so that the reserve tank A does not hit the rear wheel C, and the protrusion (5) is formed so that the reserve tank body (
4) is provided protrudingly at a predetermined position in the vertical direction.

In the drawing, IO indicates a gas chamber defined by a flexible partition member (10a) within the reserve tank body (4) to constitute a gas damper.

Further, in the above embodiment, the oil communication passage (8) was formed by a hole bored in the wall of the reserve tank body (4), but it is not limited to this. For example, as shown in FIGS. 4 and 5, ,
Connect the reserve tank body (4) to the inner and outer double cylinders (4a) (4).
b), and the gap between the inner cylinder (4a) and the outer cylinder (4b) can be used as an oil communication path (8). In this case, the protrusion (5) is connected to the outer cylinder (4b). To protrude.

Further, in this case, a top wall of the inner cylinder (4a) is provided with the inner cylinder (4a).
a) a central opening 0 facing the oil storage chamber (7);
An annular wall (121) is formed on the upper surface surrounding the annular wall (121), and an aperture tube a3 is provided to be fitted into the inner periphery of the annular wall (121). Holes (12a) (13a) are formed, and the degree of overlapping opening of these through holes (12a) (13a) is increased or decreased by rotating the throttle tube (13) to adjust the pipe resistance of the oil communication passage (8). I made it possible.

The aperture tube a3 includes an upper plate (13b) that contacts the upper end of the annular wall (IZ), and an O-ring (13b) that is fitted into the opening ('+1) and attached to the edge of the opening 4v. 11
a) and a lower plate (13C) in close contact with the aperture tube (13C) to reliably prevent oil from leaking from the sliding surface between the throttle tube (13) and the annular wall (121).

In the drawing, (l@ indicates a cap screwed onto the outer periphery of the ring 1 (121), and the shoulder (4b') at the upper end of the outer cylinder (4b) is connected to the cap a@ and the inner cylinder (4a). The two cylinders (4a) and (4b) were fixed to each other by being sandwiched from above and below by the top wall of the cylinder.

(Effects of the Invention) As described above, according to the present invention, by simply fitting the protrusion provided on the If tank body into the connection port recessed in the oil damper tube, a separate connection pipe is not required. The oil storage chamber in the tank body can be communicated with the oil chamber in the damper tube, making it possible to reduce the weight of the vehicle body and reduce the number of parts to reduce the cost of the tank, and the position of the reserve tank can be arranged at any height depending on the position of the protrusion. This has the effect of ensuring freedom in layout design.

[Brief explanation of drawings]

Fig. 1 is a side view of a motorcycle equipped with the reserve tank of the present invention, Fig. 2 is a cut-away side view of its main parts, and Fig. 3 is a side view of a motorcycle equipped with the reserve tank of the present invention.
FIG. 4 is a cross-sectional side view of a modification thereof, and FIG. 5 is a plan view taken along the line v--v in FIG. 4. (1)...Rear cushion (2)...Oil damper tube (3)...Connection port (4)...Reserve tank body (5)...Protrusion (6)...Oil communication Hole ('r)...Oil storage chamber (8)...Oil communication passage Figure 1 Figure 3 8\=Pa1

Claims (1)

[Claims] A protrusion is provided on the outer surface of the reserve tank body that can be fitted into a connection port that communicates with the oil damper tube recessed in the outer surface of the oil damper tube of the rear cushion, and an oil communication hole is bored in the protrusion. What is claimed is: 1. A reserve tank for a rear cushion, characterized in that the reserve tank body is provided with an oil passage communicating between an oil storage chamber inside the reserve tank body and the oil communication hole.