JPH082006Y2 - Master cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a master cylinder.

b. Conventional technology and its problems Conventionally, there is a master cylinder provided with a reservoir tank on the cylinder body. In such a master cylinder, it is necessary to design the reservoir tank to be large in order to increase the oil storage amount, but due to restrictions on the installation space of the master cylinder, the reservoir tank should be placed in front of the left and right sides. It is possible to make it overhang greatly.

However, when the front portion of the reservoir tank is extended to the front in this way, there is a problem that the strength of the reservoir tank is reduced in proportion to it.

Therefore, there is naturally a limit to projecting the front portion of the reservoir tank forward, and the degree of freedom in design is small.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a master cylinder having a large degree of freedom in design.

c. Means for Solving the Problems In the present invention, in order to achieve the above object, in a master cylinder in which a reservoir tank is provided on a cylinder body and a front portion of the reservoir tank is bulged forward, the reservoir tank is provided. At the bottom of the front part of the, the protruding ribs are formed downward so that the tip comes into contact with or close to the cylinder body, so that when the force is applied to the reservoir tank, The rib is in contact with the cylinder body to support the reservoir tank.

d. Embodiment Hereinafter, one embodiment of the master cylinder according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 show an embodiment of the present invention.

In the master cylinder 1 of the present embodiment, a front portion 3a of a reservoir tank 3 mounted on the cylinder body 2 is largely projected forward, and a pair of ribs 4 projecting downward from the bottom portion 3b of the front portion 3a. , 4 are provided.

These ribs 4, 4 extend in the front-rear direction, and their tips 4a, 4a have a curved shape corresponding to the outer shape of the cylinder main body 2 and are substantially in contact with the cylinder main body 2 or It is formed so as to be in a state close to. The ribs 4, 4 extend in the front-rear direction,
The rear end portions thereof are connected to another rib 5 extending in the left and right directions.

Further, in the master cylinder 1 of this embodiment, the reservoir tank 3 thereof is attached to the cylinder body 2 by using the pin 6.

The pin 6 is formed in a substantially U-shaped plane shape from a base portion 6a and a pair of leg portions 6b, 6b extending from both ends of the base portion, and further, the base portion 6a is folded back to be a substantially hook-like side surface shape. It was formed in.

Correspondingly, tongues 7 and 7 are provided on both ends of the upper portion of the cylinder body 2 so as to project left and right respectively, and these tongues 7 and 7 form grooves 8 and 8 which further open to the left and right respectively. There is.

Further, at both ends of the lower part of the reservoir tank 3, there are recesses which are opened downward and into which the tongues 7, 7 of the cylinder body 2 are fitted.
9 and 9 are formed, and the pins 6
Insertion holes 10, 10 into which the leg portions 6b, 6b are inserted are formed. The insertion holes 10 and 10 penetrate through the recesses 9 and 9 at the center thereof, and are positioned so as to match the grooves 8 and 8 when the tongues 7 and 7 are fitted into the recesses 9 and 9. .

The reservoir tank 3 is attached to the cylinder body 2 by fitting its tongue pieces 7,7 into the recesses 9,9 and inserting the leg portions 6b, 6b of the pin 6 into the insertion holes 10,10 from this side. At this time, the leg portions 6b, 6b of the pin 6 are located not only in the insertion holes 10, 10 but also in the grooves 8, 8, so that the cylinder body 2 and the reservoir tank 3 are placed via the pin 6. Are fixed to each other.

According to this embodiment, the tips 4a, 4a of the ribs 4, 4 are almost in contact with the cylinder body 2, so that the strength of the reservoir tank 3 is greatly increased as compared with the conventional one. There is. Therefore, even if an unreasonable force is applied to the reservoir tank 3, the ribs 4, 4 support the reservoir tank,
The damage is prevented.

Further, in this embodiment, the ribs 4, 4 are connected to the rib 5, so that the strength of the ribs 4, 4 is further increased.

FIG. 6 shows another embodiment of the present invention. In FIG. 6, those having the same functions as those shown in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

The master cylinder 20 of the present embodiment has a rib 21 projecting downward from the bottom portion 3b of the front portion 3a of the reservoir tank 3,
The rib 5 shown in the above embodiment is not used and is provided independently.

Thus, even if the rib 21 is provided independently, the same operational effect as in the case of the above-described embodiment can be obtained.

Although two ribs are provided in the above embodiment, the present invention is not limited to this, and one rib or more ribs may be provided if necessary.

e. Effect of the Invention As described above, according to the master cylinder of the present invention, the tip of the master cylinder protrudes from the bottom of the front part of the reservoir tank so that the tip comes into contact with the cylinder body or is close to the cylinder body. The ribs are formed so as to face downward, and when the force is applied to the reservoir tank, the ribs come into contact with the cylinder body to support the reservoir tank, so that the strength of the reservoir tank is increased. ing. Therefore, even if an unreasonable force is applied to the reservoir tank, the rib supports the reservoir tank and prevents the damage.

Therefore, it is possible to sufficiently extend the overhanging portion of the reservoir tank to sufficiently increase the capacity thereof, and the degree of freedom in designing is increased.

Further, the present invention is simple in construction, easy to implement, and advantageous in manufacturing.

[Brief description of drawings]

1 to 5 show an embodiment of a master cylinder according to the present invention. FIG. 1 is a front view thereof, FIG. 2 is a right side view showing a cross section of a main portion thereof, and FIG. FIG. 4 is a perspective view, FIG. 4 is a rear view thereof, FIG. 5 is an exploded view thereof, and FIG. 6 is a view showing another embodiment of the present invention. 1,20 …… Master cylinder, 2 …… Cylinder body, 3 ……
Reservoir tank, 3a ... front part, 4, 21 ... ribs, 6 ...
… Pin, 6a …… Base, 6b …… Leg, 7 …… Tongue, 8 ……
Groove, 9 ... Recess, 10 ... Insertion hole.

Claims (1)

[Scope of utility model registration request] 1. A reservoir tank is provided on a cylinder body,
In a master cylinder in which the front part of the reservoir tank is bulged forward, a rib protruding at the bottom of the front part of the reservoir tank so that its tip abuts on the cylinder body or is in a state close to this A master cylinder, which is formed downward, so that when a force is applied to the reservoir tank, the rib comes into contact with the cylinder body to support the reservoir tank.