JPS6040375Y2 - Oil tank mounting device for master cylinder in vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching an oil tank for storing hydraulic oil to the cylinder body of a mask cylinder that operates hydraulically operated brakes, clutches, etc. in motorcycles and other vehicles.

The above-mentioned cylinder body may be supported by the vehicle body in an inclined state with respect to the horizontal plane due to the installation location and space on the vehicle body, etc. In this case, if the oil tank body is stood perpendicularly to the top surface of the cylinder body as before. In this case, the upper opening surface of the oil tank body is no longer horizontal, and the effective volume of the oil tank body becomes smaller than its internal capacity, resulting in a disadvantage that the oil storage efficiency of the oil tank body decreases.

In order to eliminate such inconveniences, the present applicant first filed an application (Utility Application No. 53, 1983) for a cylinder body in which the middle part of the body of the oil tank body was bent toward the higher side of the cylinder body so that the upper opening surface was horizontal.
However, in that case, the inclination angle with respect to the horizontal plane of the cylinder body that can be adapted to one oil tank body was constant, so there were the following drawbacks.

In other words, the cylinder body of the mask cylinder may be installed at various angles with respect to the horizontal plane depending on the car model, so in the above-mentioned prior application, the upper surface of the opening of the oil tank body changes every time the inclination angle of the cylinder body changes. A new oil tank body must be designed and manufactured so that the
This makes it difficult to mass-produce oil tanks, leading to higher costs.

The present invention was proposed in view of the above, and even if the cylinder body of the mask cylinder is installed at an angle, even if the angle of inclination changes, it can be dealt with accurately by simply adjusting the rotation of the oil tank body of the same type. It is an object of the present invention to provide an oil tank cleft mounting device for a mask cylinder.

In order to achieve this objective, the present invention provides a vehicle in which the cylinder body of a mask cylinder is tilted with respect to a horizontal plane and supported on a vehicle body such as a steering wheel, and a mask cylinder is inserted into a receiving hole formed on the upper surface of the cylinder body. A connecting tube that is integrally formed on the lower surface of the oil tank body of the cylinder and whose bottom plate is inclined in the same direction as the cylinder body is rotatably fitted, and the body of the oil tank body is connected so that the upper opening surface of the oil tank body is approximately horizontal. The cylinder body is bent toward a higher position, and the bottom plate is provided at a higher position with an arcuate long hole concentric with the connecting tube and a plurality of positioning recesses opening at upper edges of both sides of the long hole, It is characterized in that the head of a tightening bolt screwed into the bottom surface of the receiving hole through the elongated hole is selectively engaged with the plurality of positioning recesses.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. M is a brake mask cylinder for a motorcycle,
The cylinder body 1 is composed of a metal cylinder body 1 made of A1 alloy or the like, and a synthetic resin oil tank R for storing hydraulic oil.As shown in FIG. The oil tank main body 2 of the oil tank R is installed at an angle with the brake lever 7 side facing downward in accordance with the shape of the oil tank R, and the oil tank body 2 of the oil tank R is bent in the middle to correspond to the inclination, so that the upper surface of the opening becomes approximately horizontal. A cap 4 is screwed into the opening with the diaphragm 3 sandwiched therebetween.

As is well known, in the mask cylinder M, a piston 6 is slid into a cylinder hole 5 of a cylinder body 1, and the piston is pushed forward by a brake lever 7, thereby generating brake operating pressure in a hydraulic chamber in front of the piston 6. A receiving hole 8 is formed on the top surface of the cylinder body 1, and the bottom surface of the receiving hole 8 is connected to the cylinder hole through a relief hole and a suction hole (none of which are shown) as usual. Connects with 5.

A locking pin 9 having an enlarged head 9a is screwed into the sloping bottom surface of the receiving hole 8 at a low point, and a screw hole into which a tightening bolt 10 can be screwed is installed at a high point by means such as casting. Open 11.

Further, an annular groove 12 is formed on the inner circumferential surface of the receiving hole 8, and an elastic seal ring 13 is inserted therein to keep the fitting portion between the receiving hole 8 and a connecting cylinder 14, which will be described later, oil-tight.

On the other hand, the oil tank body 2 is especially molded from a translucent resin so that the oil stored inside can be seen through from the outside.
A bottomed cylindrical connecting tube 14 that can be rotatably fitted into the receiving hole 8 is integrally formed at the lower end of the connecting tube.

The bottom plate 14a of this connecting cylinder 14 is parallel to the inclined bottom surface of the receiving hole 8, and the bottom plate 14a is parallel to the inclined bottom surface of the receiving hole 8, and the connecting pin 9 and the threaded hole 11 pass through the centers of the locking pin 9 and the screw hole 11 at the low and high points of the bottom part 14a, respectively. A pair of arcuate elongated holes 15 and 16 extending along a circle concentric with the tube 14 are bored, and one end of the elongated hole 15 on the lower side is formed into a large diameter hole 17.

Furthermore, a plurality of notch-like positioning recesses 18, 18, . . . are formed on both upper edges of the elongated hole 16 on the high side.

At that time, the large diameter hole 17 is connected to the head 9a of the locking pin 9 (as shown in the figure, a spring washer 19 and a flat washer 20).
(if the head 9a has a lock pin 9, the head 9a includes them), the elongated hole 15 is formed so that the shaft of the locking pin 9 can slide, and the positioning recess 18 is formed so that the locking pin 9 can pass therethrough. The head 10a of the bolt 10 (if it has a spring washer 21 and a flat washer 22 as shown in the figure, the head le
The elongated holes 16 are each formed so that the shaft portion of the tightening bolt 10 can slide therein.

Further, the bottom plate 14a of the connecting cylinder 14 has an arcuate communication groove 23 at its outermost periphery on the high side, and a communication hole 24 at its center.
This allows the inside of the oil tank main body 2 to communicate with the bottom of the receiving hole 8, and the oil stored in the oil tank main body 2 can be supplied to the receiving hole 8 and further to the cylinder hole 5.

To attach the oil tank R to the cylinder body 1, first, with the cap 4 removed from the oil tank body 2, the head 9a of the locking pin 9 and the large diameter hole 17 are aligned, and the connecting cylinder 14 is received. The head 9a is fitted into the hole 8 to project above the large diameter hole 17, and then the oil tank body 2 is rotated around the second fixing member to engage the shaft of the locking pin 9 in the elongated hole 15. If you match it, its head 9a
This makes it possible to prevent the bottom plate 14a of the connecting cylinder 14 from rising on the lower side.

In this way, when the locking pin 9 is engaged with the elongated hole 15 through the large diameter hole 17 on the lower side of the bottom plate 14a, the side wall of the oil tank body 2 that has collapsed directly above the locking pin 9 will be removed. This has the advantage that the bottom plate 14a and the cylinder body 1 can be easily connected without any interference.

Next, while maintaining the engaged state between the long hole 15 and the locking pin 9, the oil tank body 2 is appropriately rotated left and right to find a position where the upper surface of the opening of the oil tank body 2 is horizontal, and the plurality of positioning recesses are 18, 18... one of them is screwed into the screw hole 1 of the cylinder body 1
Match 1.

Then, the tightening bolt 10 is passed through the elongated hole 16 and the screw hole 1
1, and the head 10a is fitted into the corresponding positioning recess 18, and the tightening bolt 10 is tightened.

In this way, the tightening bolt 10 can prevent the connecting cylinder 14 from rotating and the bottom plate 14a from rising upward.

As described above, according to the present invention, in a vehicle in which the cylinder body 1 of the mask cylinder M is tilted with respect to a horizontal plane and supported on the vehicle body such as a steering bundle, the oil tank body 2 that is erected on the upper surface of the cylinder body 1 is provided. Since the body is bent toward the higher side of the cylinder body 1 so that the upper opening surface of the oil tank body 2 is approximately horizontal, even if the cylinder body 1 is inclined with respect to the horizontal plane, the upper opening surface of the oil tank body 2 is It can be held horizontally, and the effective volume of the oil tank body 2 can be matched with its internal volume to efficiently store hydraulic oil therein.

In particular, a connecting tube 14 formed integrally on the lower surface of the oil tank body 2 and having a bottom plate 14a inclined in the same direction as the cylinder body 1 is rotatably fitted into the receiving hole 8 formed on the top surface of the cylinder body 1, and the bottom plate An arcuate long hole 6 concentric with the connecting tube 14 and a plurality of positioning recesses 18, 1B, . The head 10a of the tightening bolt 10 is screwed into the bottom surface of the receiving hole 8 through the plurality of positioning recesses 1B.

18..., the bottom plate 14a of the oil tank body 2 is attached to the cylinder body 1 by using only one tightening bolt 10 located eccentrically with respect to the central axis of the connecting cylinder 14. It can be firmly tightened without relative rotation to the receiving hole 8, and when tightening, the oil tank body 1
Using a tool inserted into the bottom plate 14 from its upper opening surface,
a The tightening bolt 1-0, which is deviated toward the higher side, is attached to the bottom plate 1.
The rotation operation can be easily performed without being obstructed by the side wall of the bent body of the oil tank body 2 which is collapsed directly above the low point 4a.

In addition, when applying the mask cylinder M to another vehicle with a different inclination angle of the cylinder body 1, the oil tank body 2 can be rotated as appropriate around the receiving hole 8 of the cylinder body 1 until the upper surface of its opening is approximately horizontal. After that, the adjusted position can be reliably fixed by the engagement of the tightening bolt head 10a and the positioning recess 1B, so that the same type of oil tank body 2 can be attached to multiple types of cylinder bodies 1 with different inclination angles without any problem. This makes it possible to mass-produce the oil tank 12 and provide various mask cylinders at low cost.

[Brief explanation of drawings]

The drawings show one embodiment of the device according to the present invention, and FIG. 1 is a vertical sectional side view showing the state in which the cylinder body and the oil tank are connected, (cross-sectional view taken along line I-I in FIG. 2), FIG. 2, and FIG. FIG. 3 is a sectional view taken along the lines ■--■ and ■--■ in FIG. M...Mask cylinder, R...Oil tank,
1... Cylinder body, 2... Oil tank body, End... Receiving hole, 10... Tightening bolt, 1
0a...Head, 14...Connection tube, 14
a...Bottom plate, 16...Long hole, 18...
...Positioning recess.

Claims (1)

[Scope of utility model registration request] In a vehicle in which the cylinder body 1 of the mask cylinder M is inclined with respect to a horizontal plane and supported on a vehicle body such as a steering nozzle, the oil tank body 2 of the mask cylinder M is inserted into the receiving hole 8 formed on the upper surface of the cylinder body 1. A bottom plate 14a integrally formed on the lower surface rotatably fits a connecting tube 14 inclined in the same direction as the cylinder body 1, and connects the body of the oil tank body 2 so that the upper opening surface of the oil tank body 2 is substantially ice-cold. The cylinder body 1 is bent toward the higher side so as to be flat, and the bottom plate 14a has an arcuate long hole 16 concentric with the connecting tube 14 and the long hole 1 at the higher side of the bottom plate 14a.
a plurality of positioning recesses 18 opening on both upper edges of 6;
18... are provided, and the receiving hole 8 is inserted through the elongated hole 16.
An oil tank mounting device for a mask cylinder in a vehicle, in which a head 10a of a tightening bolt 10 screwed into the bottom surface is selectively engaged with the plurality of positioning recesses 18, 18, . . . .