JPH044928Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a synthetic resin reservoir disposed on an opening wall of a master cylinder body.

[Prior Art] A conventional reservoir mounting structure of this type is disclosed in Japanese Patent Publication No. 52-47107 shown in FIG. This mounting structure is designed to prevent the reservoir 2 from slipping out from the opening wall 1a of the master cylinder body 1 when the cap 5 is removed during use. The screws 6 were screwed into the screw holes 1d provided on the sides to tighten the connection. Further, a sealing member 4 was adsorbed between the opening wall 1a and the hanging portion 2b, which corresponds to the fitting portion between the master cylinder body 1 and the reservoir 2, to prevent oil from leaking therebetween.

[Problems to be solved by the invention] However, according to the above mounting structure, since the reservoir is made of synthetic resin, its strength is low, so the thickness of the part where the bolt is tightened must be increased. There was a problem in that the capacity of the memory became small.

[Means for Solving the Problems] The reservoir mounting structure of the present invention is a synthetic resin reservoir mounting structure that is located at the upper part of the master cylinder body and fixed to the opening wall side. an inwardly bent portion placed on the upper end surface of the opening wall; and a hanging portion extending downward from the tip of the inwardly bent portion via the bent portion and abutting the inside of the opening wall; A seal member is interposed between the part and the opening wall, and is located so as to cover substantially the entire inside of the opening wall, has an oil passage hole in a part thereof, and is screwed to the master cylinder body. a blocking piece that is bent at right angles from the outer periphery of the base piece and comes into contact with the inner periphery of the hanging part;
A metal reservoir holding member is provided, which includes a pressing piece that projects radially from the blocking piece and presses the inwardly bent portion.

[Function] Even if the lower opening side of the reservoir tries to contract due to changes in the usage environment temperature, the inner bent part and hanging part of this lower opening side prevent it from contracting with the opening wall of the master cylinder main body and the pressing piece of the reservoir holding member. Since the reservoir is held in a sandwiched state from both horizontal and vertical sides by the two pieces, the mounting strength of the reservoir does not decrease, and the sealing performance can be ensured for many years by the interposition of the sealing member.

[Example] Hereinafter, an example of the present invention will be described based on the accompanying drawings. Note that the same reference numerals are used for parts that are the same as or correspond to those in the prior art.

As shown in FIGS. 1 and 2, the reservoir 2 located at the upper part of the master cylinder main body 1 in this embodiment and fixed to the opening wall 1a side is molded from synthetic resin, and the reservoir 2 is formed from a lower opening 2a. The following main parts are provided on the side. That is, an inwardly curved portion 2c that can be placed closely on the upper end surface of the opening wall 1a of the master cylinder body 1 is provided at a horizontal surface position on the side of the lower opening 2a by being connected to the upper reservoir wall surface. ing. Further, 2e indicates a plurality of annular protrusions provided on the upper surface of the inner bent portion 2c, and 2f
is a rib erected along the side surface of the reservoir 2 from the inner bent portion 2c. Then, a substantially right-angled bent part 2d is formed below the tip of this inwardly bent part 2c, and this bent part 2d changes the horizontal plane to the vertical direction.
A hanging portion 2b is provided in a continuous manner by bending and extending the surface portion downward from the position d and capable of coming into contact with the inner side 1b of the opening wall 1a, whereby the reservoir 2 is integrally molded. There is. The reservoir 2 according to this embodiment includes an opening wall 1 of the master cylinder body 1.
a, the inner bent portion 2c is in close contact with the upper end surface at this position, and the hanging portion 2b is removably abutted on the inner side 1b. Note that 5 is a cap that is attached to the upper opening of the reservoir 2.

Next, the opening wall 1 of the master cylinder body 1 described above
In a, the corner where the upper end surface and the inner side 1b intersect is removed in a diagonal manner to form a tapered surface 1c continuous in the circumferential direction. And this tapered surface 1c
A ring-shaped sealing member 4 is located at the position of the opening wall 1.
It is sorbed in a sealed manner so as to be covered from two sides by an inwardly curved portion 2c which is a horizontal surface on the side of the reservoir 2 that is in close contact with the upper end surface of the container a, and a hanging portion 2b which is in contact with the inner side 1b. That is, the seal member 4 is interposed between the bent portion 2d and the opening wall 1a.

A reservoir holding member 3 shown below is fitted into the lower opening 2a of the reservoir 2 according to the above embodiment. The reservoir holding member 3 is formed of a metal plate into an ashtray shape that can fit into the lower opening 2a. That is, a horizontal base piece 3a is formed at the bottom of the reservoir holding member 3 and covers substantially the entire inside of the opening wall 1a of the master cylinder body 1 between the lower openings 2a. A hole (not shown) is provided in the center band of this base piece 3a, and the reservoir holding member 3 is fitted with a hole (not shown) that matches each screw hole 1d screwed into the two pillars 1e standing in the center of the opening wall 1a. There is. Note that an oil passage hole 3d through which hydraulic oil can pass is provided in a part of the base piece 3a. At the outer circumferential position of the base piece 3a, the previously horizontal plane is vertically bent to face the inner circumference 1b of the opening wall 1a, and the inside of the hanging part 2b provided in the lower opening 2a of the reservoir 2 is bent. A blocking piece 3b that can be brought into contact with the periphery is continuously provided, and the reservoir 2 is held by sandwiching the hanging portion 2b between the blocking piece 3b and the opening wall 1a. Further, a pressing piece 3c having an annular horizontal surface is arranged in a row to protrude in the radial direction from the upper end of the blocking piece 3b, thereby forming an integral reservoir holding member 3.

The reservoir holding member 3 as described above includes the blocking piece 3b
is brought into contact with the hanging portion 2b of the reservoir 2, and the outer edge of the pressing piece 3c is placed on the upper surface of the inner bent portion 2c that engages with the rib 2f of the reservoir 2.
From each hole (not shown) in the base piece 3a to the pillar 1e directly below it
By screwing the screw 6 into the screw hole 1d screwed into the screw hole 1d and tightening it, the pressing piece 3c presses the inner bent portion 2c immediately below against the upper end surface of the opening wall 1a, whereby the tapered surface 1c The sealing member 4, which is sorbed at the position , is fitted with a pressing force that can maintain perfect sealing performance.

Next, the effect will be explained. In the reservoir mounting structure according to the present embodiment having the above configuration, even if the lower opening 2a side of the reservoir 2 tries to contract due to a change in the operating environment temperature, for example, the inwardly bent portion 2c and the hanging portion 2b on the lower opening 2a side will not be connected to the master cylinder. Main body 1
Since the opening wall 1a and the reservoir holding member 3 are held in a clamp-like manner from the inside and outside in both the horizontal and vertical directions, decisive contraction that would lead to loss of sealing performance is prevented. Become. Also,
Even if one of the above two sides contracts, the other side remains in close contact with the other side, and
Since the sealing member 4 is interposed at the intersection of the horizontal plane and the vertical plane, it is possible to stably maintain the original sealing performance without being affected by shrinkage on either side.

[Effects of the invention] As explained above, the reservoir mounting structure of the present invention includes an inner bent part placed on the upper end surface of the opening wall on the lower opening side of the reservoir, and a bent part from the tip of this inner bent part. a hanging part that extends downward through the opening wall and comes into contact with the inside of the opening wall, a sealing member is interposed between the bent part and the opening wall, and substantially the entire inside of the opening wall is covered. a base piece that is positioned so that the base piece is bent at a right angle from the outer periphery of the base piece and has an oil hole in a part thereof and is screwed to the master cylinder body; and a blocking piece that is bent at a right angle from the outer periphery of the base piece and abuts on the inner periphery of the hanging part. and a pressing piece that protrudes in the radial direction from this blocking piece and presses the inwardly curved portion, so that the reservoir body made of synthetic resin can be directly bolted to the master cylinder body. This eliminates the need to attach the reservoir to the opening wall of the master cylinder body, the pressing piece of the reservoir holding member, and the opening wall of the master cylinder body, even if the lower opening side of the reservoir tries to contract due to temperature changes in the usage environment. Since the inner bent part and the hanging part of the reservoir are held between two sides by the blocking piece, the attachment strength of the reservoir can be improved. Furthermore, the presence of the sealing member ensures sealing performance for many years, improving reliability. It also becomes easier to install.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal side view showing an embodiment of the reservoir mounting structure according to the present invention, Fig. 2 is a detailed view of section A in Fig. 1, and Fig. 3 is an example of the reservoir mounting structure according to the prior art. It is a partially longitudinal front view shown. 1... Master cylinder body, 1a... Opening wall,
1b...Inside, 2...Reservoir, 2a...Lower opening, 2b...Drooping part, 2c...Inner curved part, 2d...
...Bending portion, 3... Reservoir holding member, 3a... Base piece, 3b... Blocking piece, 3c... Pressing piece, 3d...
Oil hole, 4...Sealing member.

Claims (1)

[Scope of utility model registration request] In the mounting structure for a synthetic resin reservoir located at the upper part of the master cylinder body and fixed to the opening wall side, the lower opening side of the reservoir has an inner bent part placed on the upper end surface of the opening wall; a hanging part that extends downward from the tip of the inwardly bent part through the bent part and comes into contact with the inside of the opening wall, a sealing member is interposed between the bent part and the opening wall, and the opening wall A base piece is positioned so as to cover almost the entire inside of the cylinder and has an oil hole in a part thereof and is screwed to the master cylinder body. A reservoir mounting structure characterized in that a metal reservoir holding member is provided, comprising a blocking piece that abuts the inner periphery and a pressing piece that projects in the radial direction from the blocking piece and presses the inwardly curved portion.