JPH0565734U - Inlet union for master cylinder - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the assembly to the master cylinder. [Structure] With respect to the master cylinder 1, each conduit member 7, 8
In the inlet union assembled by the common mounting cover 11, coupling portions 14, 15 having insertion holes 14a, 15a through which the coupling pin 20 is inserted are formed on both sides of the mounting cover 11, and the coupling portion 14, An engaging tongue piece 16 is projectingly provided at an intermediate position of 15, and the connecting pin 20 is fitted and inserted together with the through holes 14a, 15a and the through hole 4b of the mounting portion 4a on the master cylinder 1 side, and a part of the connecting pin 20. The engaging tongue piece 16 is engaged with the groove portion 20c provided in the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inlet union of a master cylinder such as a tandem master cylinder used in a vehicle brake system.

[0002]

[Prior Art]

 In the conventional master cylinder of this type, for example, a tandem master cylinder, there are those in which a reservoir is directly attached, and those in which a reservoir attached to a vehicle body is connected via a hose. In the latter tandem master cylinder, an inlet union having two independent pipe line members for supplying a working fluid from a reservoir to each pressure chamber of the master cylinder was attached.

The inlet union is composed of two independent pipe line members and a mounting cover or a mounting plate, and the fitting portion of each pipe line member communicates with each pressure chamber of the master cylinder. The mounting cover or the mounting plate is fitted into the hydraulic fluid supply ports via the annular seal members, respectively, so that the flange portion provided on the conduit member is pressed toward the master cylinder by screwing the fixing screw. Was attached to and joined to. (For example, Japanese Utility Model Publication No. 56-39351 and Japanese Utility Model Publication No. 3-52270)

[0004]

[Problems to be solved by the device]

 However, in the conventional inlet union, the pipe line members are connected to the master cylinder side together with the mounting cover or the mounting plate by screwing the fixing screws. There is a problem that a fastening device for the fixing screw or a tool and its fastening torque control are required at the time of assembly.

Therefore, there is a problem that not only is the assembly of the inlet union into the master cylinder troublesome, but also the assembling time becomes long and the manufacturing cost increases.

The present invention has been made in view of the above points, and an object thereof is to solve the above-mentioned problems, to facilitate the assembling into a master cylinder, and to simplify the assembling process. To provide a union.

[0007]

[Means for Solving the Problems]

 The configuration of the present invention for achieving the above-mentioned object is such that a plurality of independent pistons and pressure chambers are arranged vertically, and a master cylinder is provided with a plurality of independent working fluids from a reservoir. In the master cylinder inlet union, which has a conduit member, and each conduit member is connected to the master cylinder by a common mounting cover via the flange portion, the following is provided.

(1) The mounting cover is formed with coupling portions having insertion holes for inserting coupling pins described later on both sides thereof, and is attached to an intermediate position corresponding to the insertion holes of both the coupling portions. The connecting pin that projects the tongue piece and is used for connecting the mounting cover and the master cylinder includes an insertion hole for both the connecting portions of the mounting cover and an insertion hole for the mounting portion provided on the master cylinder side. Is fitted and fixed together, and a groove portion is provided so as to be engaged with the engaging tongue piece in correspondence with the protruding position of the engaging tongue piece.

(2) The mounting cover according to (1) is formed of a synthetic resin material.

[0010]

[Work]

 Since the present invention is configured as described above, the connection of each of the above-described conduit members to the master cylinder is performed by connecting pins with the insertion holes of the connecting portions formed on both sides of the mounting cover. A so-called pin insertion structure is formed in which the insertion hole of the mounting portion on the master cylinder side is fitted and coupled together, and the coupling pin is engaged with the engaging tongue piece of the attachment cover to prevent it from falling off.

[0011]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be exemplarily described in detail with reference to the drawings. 1 to 4 show an embodiment of an inlet union for a master cylinder of the present invention, FIG. 1 is a sectional view thereof, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a view showing a mounting cover, and FIG. 3A is a plan view thereof, FIG. 3B is a sectional view taken along line III (B) -III (B) of FIG. 3A, and FIG. 4 is a front view of a coupling pin.

In FIG. 1, reference numeral 1 denotes a plurality of sets (two sets are shown in the present embodiment) of pistons 2 and 2 and pressure chambers 3 and 3 arranged vertically in the cylinder axis direction. In the tandem master cylinder according to the present invention, hydraulic fluid supply ports 5 and 6 for supplying hydraulic fluid from a reservoir (not shown) to the pressure chambers 3 and 3 are formed above the cylinder body 4.

Each of the independent pipe line members 7 and 8 is made of a synthetic resin material such as nylon, and the pipe line members 7 and 8 are fitted into the fitting portions 7a and 8a and the mounting flange, respectively. It is composed of parts 7b and 8b and hose connecting parts 7c and 8c.

The fitting portions 7a and 8a are fitted into the hydraulic fluid supply ports 5 and 6 of the master cylinder 1 via the annular seal members 9 and 10, respectively, and the hose connecting portions 7c and 8c are It is connected to a reservoir (not shown) attached to the vehicle body via a connection hose (not shown).

Reference numeral 11 denotes a mounting cover, which simultaneously mounts and couples the respective pipe line members 7 and 8 fitted into the hydraulic fluid supply ports 5 and 6 of the master cylinder 1 to the master cylinder 1. It is molded by using a synthetic resin material such as polypropylene.

The mounting cover 11 has holes 12 and 13 for inserting the conduits on the hose connecting portions 7c and 8c side of the conduit members 7 and 8, respectively, and the peripheral portions of the holes 12 and 13 are provided. The fixing flange portions 7b and 8b of the respective pipe line members 7 and 8 are pressed and fixed while being joined.

In order to fix the mounting cover 11 to the master cylinder 1, insertion holes 14a and 15a for inserting the coupling pins 20 are provided at both ends of the mounting cover 11, respectively. When the connecting pin 20 is formed on the space passage through which the connecting pin 20 is inserted through the insertion holes 14a and 15a, the engaging tongue piece 16 is moved downward from the upper surface in FIG. 3 at an intermediate position between the insertion holes 14a and 15a. Has been projected.

It should be noted that, of the two insertion holes 14a and 15a, one of the insertion holes 14a has an inner diameter smaller than that of the other of the insertion holes 15a, and the peripheral portion of the insertion hole 14a is inserted into the coupling hole. It serves as a stopper for the stepped portion 20a formed on the pin 20.

As shown in FIG. 4, the connecting pin 20 is provided with the step portion 20a near its tip, so that the outer diameter of the tip 20b is smaller than the outer diameter of the pin (inserted in the insertion hole 14a). In addition, a groove portion 20c is provided at a position corresponding to the engaging tongue piece 16 protruding from the mounting cover 11 so that the tip of the engaging tongue piece 16 is engaged.

On the other hand, in the cylinder body 4 of the master cylinder 1, in order to fix the mounting cover 11, the mounting portion 4 a disposed between the coupling portions 14 and 15 of the mounting cover 11 has the above-mentioned structure. The insertion holes 4a and 15a provided in the coupling portions 14 and 15 and the insertion hole 4b are provided so as to be on the same axis line when fixed.

Next, in order to fix the mounting cover 11 to the master cylinder 1, the pipe line members 7 and 8 fitted in the hydraulic fluid supply ports 5 and 6 of the master cylinder 1 are simultaneously removed. While pressing the mounting flange portions 7b and 8b with the mounting cover 11, the coupling pin 20 is used to insert the coupling holes 14a and 15a of the coupling portions 14 and 15 of the mounting cover 11 into the cylinder body. The insertion hole 4b of the mounting portion 4a of 4 is fitted and inserted on the same axis to fix the both, and the pipe line members 7 and 8 are connected to the master cylinder 1.

When inserting the connecting pin 20, the tip of the connecting pin 20 is inserted through the insertion hole 15a on the A surface side of the mounting cover 11 shown in FIG. 1, and the step portion 20a of the connecting pin 20 is The fitting portion 15 is inserted until it comes into contact with the peripheral edge stopper of the insertion hole 15a.

At the same time, the tip of the engaging tongue piece 16 is attached to the groove 20 c of the connecting pin 20 by its elastic force. The engagement pin 30 is engaged with the groove 20c so that the coupling pin 30 is prevented from coming off and does not fall off.

In order to remove the mounting cover 11 from the master cylinder 1, if the connecting pin 30 is pushed with a thin rod from the B side of the mounting cover 11 shown in FIG. The tip of 16 is deformed by its elastic force, the engagement with the groove 30c of the connecting pin 30 is released, and the connecting pin 30 is disengaged.

In the present embodiment, as shown in the drawing, a plurality of concave and convex portions 7d and 8d (8d) are formed on the peripheral edges of the mounting flange portions 7b and 8b of the conduit members 7 and 8, for example, in the form of spur gears. Are partially omitted in the drawing), and a plurality of uneven portions 17 and 18 are formed on the side of the mounting cover 11 so as to engage with the uneven portions 7d and 8d, for example, in the shape of an internal gear. By changing the engagement positions of the two concavo-convex portions 7d, 8d and 17, 18 formed on both sides, the direction θ of the hose connecting portions 7c, 8d of the respective conduit members 7, 8 can be changed to different types. It can be changed appropriately for the vehicle.

Note that the technique of the present invention is not limited to the technique in the above-described embodiment, and means of another aspect having the same function may be used, and the technique of the present invention is within the scope of the above configuration. Various changes and additions are possible.

[0027]

[Effect of the device]

 As is apparent from the above description, according to the master cylinder inlet union of the present invention, when the respective conduit members are coupled to the master cylinder, the coupling pin insertion holes are formed on both sides of the mounting cover of the conduit member. In addition to forming a connecting portion having the above-mentioned structure, the engaging tongue piece is projected at an intermediate position between the both connecting portions, and the connecting pin is formed in both the insertion hole and the insertion hole of the mounting portion on the master cylinder side. Since the engaging pin is provided with a groove portion in a part thereof, and the engaging tongue piece is engaged with the groove portion when the engaging pin is inserted, the engagement with the master cylinder is made by connecting the engaging pin to the master cylinder. Only the insertion and the attachment to the engaging tongue piece are performed, and the assembling work becomes extremely easy.

Further, as compared with the conventional assembling with the fixing screw, the screw tightening device or the tool and the tightening torque management thereof are not required, and the assembling process can be simplified.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an inlet union for a master cylinder of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a view showing a mounting cover, FIG. 3 (A) is a plan view thereof, and FIG. 3 (B) is III (B) -III (B) of FIG. 3 (A).
It is sectional drawing by a line.

FIG. 4 is a front view of a connecting pin.

[Explanation of symbols]

 1 Master Cylinder 4 Cylinder Body 4a Mounting Part 4b, 14a, 15a Insertion Hole 7,8 Pipe Line Member 11 Mounting Cover 14,15 Coupling Part 16 Engaging Tongue 20 Coupling Pin 20c Groove Part

Claims (2)

[Scope of utility model registration request] 1. A master cylinder in which a plurality of sets of pistons and pressure chambers are arranged vertically is provided with a plurality of independent conduit members for supplying a working fluid from a reservoir to each of the pressure chambers. In a master cylinder inlet union in which each pipe member is joined to the master cylinder by a common mounting cover via its flange portion, the mounting cover has insertion holes for inserting coupling pins described below on both sides thereof. The connecting pin having a hole is formed, and the engaging tongue piece is projectingly provided at an intermediate position corresponding to the insertion hole of both the connecting parts, and the connecting pin used for connecting the mounting cover and the master cylinder is the mounting member. The insertion holes of both the connecting portions of the cover and the insertion holes of the mounting portion provided on the master cylinder side are both fitted and fixed to each other, and the protruding position of the engaging tongue piece. Correspondingly, the inlet union for the master cylinder, characterized in that grooves are provided so as to engaged with the engaging adhesive tongue. 2. The master cylinder inlet union according to claim 1, wherein the mounting cover is made of a synthetic resin material.