JPH08337164A - Assembly of master cylinder and reservoir - Google Patents

Abstract

PURPOSE: To increase the degree of freedom of the position to arrange a pin member to a supply cylinder and a boss by providing a working fluid flow passage to be formed between the inner surface of the supply cylinder and a regulating part on the inner surface of an end part of a cylinder body side of the supply cylinder. CONSTITUTION: A regulating part 451 extending along one diameter of a forward supply cylinder 171 is continuously provided on the inner side of the end part on a cylinder body 111 side of the forward supply cylinder 171 at a reservoir R1 to prevent detachment of a valve opening rod 40 which is the pin member fitted to supporting holes 43, 44 from the cylinder body 111 . A working fluid flow passage 461 is formed between each side of the regulating part 451 and the inner surface of the forward supply cylinder 171 . The maximum space between the inner surface of the forward supply cylinder 171 and the regulating part 451 is smaller than the diameter of the valve opening rod 40. The working fluid flow passage 461 is of the shape to prevent one end of the valve opening rod 40 from entering, and the degree of freedom of the position to arrange the valve opening rod 40 to the supply cylinder 171 and a boss 121 can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder body of a master cylinder provided with a cylindrical boss projecting from an outer surface of an upper portion of the cylinder body, and a replenishing cylinder provided in a reservoir attached to the cylinder body via a grommet. A master-fitting pin member that is fitted to a boss and that regulates the retreat limit of a piston that is slidably fitted to the cylinder body is fitted to the cylinder body with one end facing the inner end of the boss. Cylinder and reservoir assembly.

[0002]

2. Description of the Related Art Conventionally, such an assembly is already known, for example, from Japanese Patent Publication No. 62-5821.

[0003]

However, in the above-mentioned prior art, the pin member is prevented from coming out of the cylinder body by abutting one end of the pin member on the end face of the peripheral wall of the replenishing cylinder. The relative position between the pin member and the supply cylinder, that is, the boss is fixed, and the position at which the pin member is arranged is restricted. Therefore, in the tandem type master cylinder, when the stroke of one of the pair of pistons is changed, the arrangement position of the pin member is set to, for example, three.
If the amount is changed by a small amount of about mm, one of the pair of bosses needs to be slightly moved due to the fixed relative position of the pin member and the boss, and the reservoir is newly manufactured accordingly. There will be a need.

The present invention has been made in view of the above circumstances, and provides an assembly of a master cylinder and a reservoir in which the degree of freedom of the arrangement position of the pin member with respect to the supply cylinder and the boss can be increased. The purpose is to

[0005]

In order to achieve the above object, the invention according to claim 1 is such that a cylinder body of a master cylinder is provided with a cylindrical boss projecting from an outer surface of an upper portion thereof, and is attached to the cylinder body. A replenishing cylinder provided in the reservoir is fitted into the boss via a grommet, and a pin member that slidably fits in the cylinder body and restricts the retreat limit of the piston has one end thereof inside the boss. In a master cylinder / reservoir assembly that is fitted to a cylinder body facing the end, a hydraulic fluid flow passage having a shape that prevents one end of a pin member from entering the inner surface of at least the cylinder body side of the supply cylinder. Is characterized in that a regulating portion is formed between the inner surface of the replenishing cylinder and the inner surface of the replenishing cylinder.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the structure of the invention described above, the restriction portion is formed in a cross shape in a plane orthogonal to the axis of the supply cylinder.

[0007]

According to the structure of the invention described in claim 1, one end of the pin member does not enter the working fluid flow passage formed between the inner surface of the replenishing cylinder and the regulating portion, and the pin member moves away from the cylinder body. The movement of the pin member is blocked by at least one of the peripheral wall end surface of the supply cylinder and the restriction portion, and the pin member may be arranged at any position within the range corresponding to the diameter of the supply cylinder. become.

Further, according to the configuration of the invention described in claim 2, since the regulating portion is formed in a cross shape, the effect of reinforcing the supply cylinder by the regulating portion can be enhanced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show a first embodiment of the present invention. FIG. 1 is a partially cutaway vertical side view of an assembly of a master cylinder and a reservoir, and FIG. 2 is an enlarged main part of FIG. Fig. 3 is a sectional view taken along line 3-3 of Fig. 2, and Fig. 4 is 4-4 of Fig. 2.
It is a line sectional view.

First, in FIG. 1, the upper part of the cylinder body 11 ₁ of the tandem type master cylinder M ₁ is
Cylindrically formed front boss 12 ₁ and rear boss 13
₁ is integrally provided so as to project upward at positions spaced apart in the axial direction of the cylinder body 11 ₁ .
A flat plate-like connecting arm 14 ₁ is integrally provided at an intermediate portion between the bosses 12 ₁ and 13 _{1 so as} to project upward.

This master cylinder M₁Is it a synthetic resin?
Comprising a reservoir R₁Is attached to the
Bar R₁In the lower part of the₁Front of and
Rear boss 12₁, 13₁Through grommets 15 and 16
Cylindrical front and rear supply cylinders 1 fitted together
7₁, 18₁And the cylinder body 11₁Connecting arm 14 ₁
A flat plate-shaped connecting arm 19 that abuts on the side₁Together with
Provided and connecting arm 19 ₁Is the connecting arm 14₁To the bolt 20
Therefore, it is fastened.

Cylinder body 11₁The cylinder body 11
₁Front hydraulic chamber 21 between the front end wall of the ₁Forming the front
Stone 22₁And the front piston 22₁Rear fluid between
Pressure chamber 23₁Rear piston 24 forming the₁And can slide
Is fitted to. Also, the cylinder body 11₁In the front hydraulic chamber
21₁Front output port 25 leading to₁And the rear hydraulic chamber 2
Three₁And a rear output port (not shown) leading to
It Furthermore, the front hydraulic chamber 21₁The front piston 22₁To
Front part return spring 26 for biasing to the rear side₁Is stored in the rear
Hydraulic chamber 23₁And the front piston 22₁And rear piston
24₁Between the rear piston 24₁To the rear side
Biasing return spring 27₁Is reduced.

Referring also to FIGS. 2 and 3, the front piston
Stone 22₁Is a pair of front and rear piston portions 22a, 22b
Are integrally connected through the rod portion 22c.
And the piston portion 22a on the front side has the piston portion 2
A plurality of replenishing holes 28 penetrating back and forth through 2a₁... is drilled
And those supply holes 28₁An annular strip that covers the front side
Pacer 29 and supply hole 28₁From the side, the front hydraulic chamber 21₁
Allows the hydraulic fluid to flow into the cylinder body 11₁Inside
Cup seal 30 sliding on₁Of the piston 22a
It is mounted on the front side. In the rear piston part 22b
Is the cylinder body 11 ₁Cup seal 31 slidingly contacting the inner surface of
₁Is installed.

Front piston 22₁And cylinder body 11
₁Between the pair of front and rear pistons 22a and 22b
Liquid chamber 32₁Is formed in an annular shape, and this replenishing liquid chamber 32
₁Front boss 12₁Supply port opening inside
33 is the cylinder body 11₁Drilled in the reservoir R₁Before
Part supply cylinder 17₁The hydraulic fluid supplied from the ₁
Will be supplied to.

The front piston 22 ₁ is provided with a central type relief valve 35 for communicating between the front hydraulic chamber 21 ₁ and the replenishing liquid chamber 32 ₁ when the front piston 22 ₁ returns to the retracted limit position. It is provided. The relief valve 35 includes a valve casing 36 which is mounted coaxially on the front end of the front piston 22 _1, supply fluid chamber 32 front piston 22 ₁ of the piston 2 through the ₁
2a and a valve hole 37 that is formed coaxially in the valve box 36 and that opens in the valve box 36 at the front end of the piston portion 22a;
Of the valve box 36 that can be closed in the front end opening thereof and is housed in the valve box 36 so as to be movable back and forth; When the valve spring 39 housed therein and the front piston 22 ₁ are in the retracted limit, the valve body 38 is held in the forward position against the spring biasing force of the valve spring 39, but when the front piston 22 ₁ moves forward. And a valve opening rod 40 that allows the valve spring 38 to move backward, that is, to close the valve body 38.

The rod portion 22c of the front piston 22 ₁ is provided with a long hole 41 which is long in the axial direction of the rod portion 22c, and both ends of the long hole 41 communicate with the replenishing liquid chamber 32 ₁ .
Both ends of the valve opening rod 40 are supported by the cylinder body 11 ₁ and inserted into the elongated hole 41, and the rear end of the rod 42 that is connected to the valve body 38 and inserted into the valve hole 37 has the valve opening rod 40 opened. 40 is abutted.

According to such a relief valve 35, when the front piston 22 ₁ is in the retracted limit, the rod 42 is pressed by the valve opening rod 40 so that the valve body 38 opens the valve hole 37. Then, the valve is opened, and the replenishing liquid from the replenishing liquid chamber 32 ₁ can be replenished to the front hydraulic chamber 21 ₁ . Further, when the front piston 22 ₁ moves forward from the backward limit, the valve body 40 moves relative to the front piston 22 ₁ so that the valve opening rod 40 is positioned rearward in the elongated hole 41, so that the valve element 38 causes the valve spring 39 to move.
The spring force moves to a position where the valve hole 37 is closed, and the replenishing liquid chamber 32 ₁ and the front hydraulic chamber 21 ₁ are shut off from each other.

By the way, the valve opening rod 40 is used for the front piston 2
The cylinder body 11 ₁ has a function as a pin member for restricting the retreat limit of 2 ₁ and has a support hole 43 that opens at the inner end of the front boss 12 ₁ and penetrates the side wall of the cylinder body 11 _1. And a support hole 44 formed coaxially with the support hole 43 and formed in a bag hole, so that one end of the valve opening rod 40 faces the inner end of the front boss 12 _1. And is fitted into the support holes 43 and 44.

Referring also to FIG. 4, supporting holes 43, 44
Cylinder body 11 ₁ of the valve opening rod 40 that is fitted to the
In order to prevent the detachment from the inside of the reservoir R ₁ , the inner surface of the end of the front part supply cylinder 17 _{1 on} the cylinder body 11 ₁ side is
The restriction portion 4 extending along the one diameter line of the front supply cylinder 17 _1.
5 ₁ are connected in series, and hydraulic fluid flow passages 46 ₁ , 46 are provided on both sides of the restriction portion 45 ₁ between the restriction portion 45 ₁ and the inner surface of the front supply cylinder 17 _1.
1 is formed. Moreover, the maximum distance W (see FIG. 4) between the inner surface of the front supply cylinder 17 ₁ and the regulating portion 45 ₁ is equal to the valve opening rod 4
It is set smaller than the diameter D of 0 (see FIG. 3),
As a result, the hydraulic fluid flow passages 46 ₁ and 46 ₁ are closed by the valve opening rod 40.
Will be formed in a shape that prevents one end of each of them from entering into the flow passages 46 ₁ , 46 ₁ .

Referring again to FIG. 1, the rear piston 24 ₁ has the bearing member 4 fitted to the rear end of the cylinder body 11 _1.
A piston rod 48 ₁ slidably supported by 7 ₁ is coaxially and integrally connected. Thus the rear piston 24 ₁
An annular replenishing liquid chamber 49 ₁ is defined between the bearing member 47 ₁ and the bearing member 47 ₁ . On the other hand, the cup seal 50 on the outer periphery of the rear piston 24 ₁ to permit the flow of hydraulic fluid to the rear fluid pressure chamber 23 ₁ from supply fluid chamber 49 ₁ in the forward position than supply fluid chamber 49 _1
1 is mounted, and the rear piston 24 ₁ is provided with a plurality of supply holes 51 ₁ ... For communicating the supply liquid chamber 49 ₁ with the back surface of the cup seal 50 ₁ . Also, the cylinder body 11 ₁
A replenishment port 52 is formed in the rear boss 13 ₁ so as to be constantly connected to the replenishment liquid chamber 49 ₁ , and the reservoir R
So that the hydraulic fluid is replenished from the rear supply cylinder 18 ₁ of ₁ is supplied to the supply fluid chamber 49 _1.

The rear piston 24 ₁ has a replenishing liquid chamber 49 ₁
A central type relief valve 53 interposed between the rear hydraulic chamber 23 ₁ and the rear hydraulic chamber 23 ₁ is provided. The relief valve 53 has basically the same configuration as the relief valve 35 provided in the front piston 22 _1. Although not described in detail because it has, the valve opening rod 54, which is a component of the relief valve 53, is inserted into the elongated hole 55 provided in the rear piston 24 ₁ and is supported by the support ring 56 surrounding the piston rod 48 _1. Both ends of the valve opening rod 54 are supported. Moreover, a spring (not clearly shown) is contracted between the rear piston 24 ₁ and the support ring 56, and the support ring 56 is biased by the spring force in the direction to be received by the bearing member 47 ₁ . That is, the support ring 56 is fixedly arranged at the position in contact with the bearing member 47 ₁ , and is substantially at the fixed position.

Further front and rear pistons 22 ₁ , 2
Between 4 ₁ maximum space restricting means 57 ₁ for regulating the maximum distance between their pistons 22 _1, 24 ₁ are provided.

Next, to explain the action of this first embodiment, is advanced actuating the rear piston 24 ₁ the operating force applied to the piston rod 48 _1, a rear return spring 27 ₁ with a relief valve 53 is closed A forward pressing force acts on the front piston 22 ₁ via the
_The relief valve 35 is closed in accordance with the forward movement operation of _1, and hydraulic pressure is generated in the front hydraulic chamber 21 ₁ . Then the rear piston 24
_In accordance with the further forward movement of ₁ , hydraulic pressure is generated in the rear hydraulic chamber 23 _1, and the hydraulic pressure generated in both hydraulic chambers 21 ₁ and 23 ₁ is supplied as brake hydraulic pressure to a wheel brake (not shown). Become.

Piston rod 48₁The operation force action on
When removed, both return springs 26₁, 27 ₁Due to the spring force of
And rear piston 22₁, 24₁Is the reverse operation
Can be Thus the front piston 22₁The retreat limit of is the valve rod 4
0 and also the rear piston 24₁The retreat limit of
It is defined by the support ring 56.

The valve opening rod 40 is fitted in the cylinder body 11 ₁ with one end thereof facing the inner end of the front boss 12 _{1. 1}
Although it is blocked by the front supply cylinder 17 ₁ fitted to the front boss 12 ₁ through the grommet 15, the front supply cylinder 17 _{1 has} an inner surface on the cylinder body 11 ₁ side. The hydraulic fluid flow passages 46 ₁ and 46 ₁ are connected to a restricting portion 45 _{1 which} is formed between the hydraulic fluid flow passages 46 ₁ and 46 ₁ and the inner surface of the front supply cylinder 17 ₁ .
The hydraulic fluid flow passages 46 ₁ and 46 ₁ are formed in a shape that prevents one end portion of the valve opening rod 40 from entering the flow passages 46 ₁ and 46 ₁ . That is, the cylinder body 11 ₁
The movement of the valve opening rod 40 in the direction of separating from the supply cylinder 17 ₁
Will be blocked by at least _one of the end face of the peripheral wall and the regulating portion 45 ₁ . Therefore, the front supply cylinder 17 ₁
At any position within the range corresponding to the diameter of
Even if 0 is provided, it is possible to prevent the valve opening rod 40 from separating from the cylinder body 11 _1, and the degree of freedom of the arrangement position of the valve opening rod 40 with respect to the front supply cylinder 17 ₁ and the front boss 12 ₁ . Can be increased. As a result, both pistons 2
Even if the stroke of the front piston 22 ₁ of 2 ₁ and 24 is changed, as long as the movement of the valve opening rod 40 due to the change of the stroke is limited to within the front boss 12 ₁ , both bosses 1
There is no need to change the distance between 2 ₁ and 13 ₁ and therefore to make a new reservoir R ₁ .

[0027] FIG. 5 shows a modification of the first embodiment, regulating portions 45 ₁ provided in the front supply cylinder 17 _1, the front supply cylinder 17 ₁ from the end portion of the cylinder body 11 ₁ side It may be provided over a relatively long distance along the axis of the front supply cylinder 17 ₁ .

FIG. 6 shows a second embodiment of the present invention, and the portions corresponding to the above-mentioned embodiment are designated by the same reference numerals.

On the inner surface of the end of the front supply cylinder 17 _{1 on} the cylinder body 11 ₁ side, there is continuously provided a restricting portion 45 ₂ formed in a cross shape in a plane orthogonal to the axis of the supply cylinder 17 ₁ . Four hydraulic fluid flow passages 46 ₂ , 46 ₂ ... Are formed between the inner surfaces of the restriction portion 45 ₂ and the front supply cylinder 17 ₁ . Moreover, each of the hydraulic fluid flow passages 46 ₂ , 46 ₂ ... Is formed in a shape that prevents one end of the valve opening rod 40 (see the first embodiment) from entering into the flow passages 46 ₂ , 46 ₂ . .

According to this second embodiment, on which exhibit the same effects as in the first embodiment, by restricting portion 45 ₂ is formed in a cross shape, as reinforcing rib to the regulating unit 45 ₂ The above function can be fulfilled, and the strength of the front part supply cylinder 17 _{1 in} the radial direction can be improved. As a result, the front replenishment cylinder 17 can be installed when the reservoir is assembled to the master cylinder.
₁ is deformed, or at least the end of the front replenishing cylinder 17 _{1 on} the cylinder body 11 ₁ side is deformed inward when vacuuming is performed for air bleeding just before the initial filling of the working fluid, and the reservoir moves from the master cylinder. It is possible to prevent it from coming off easily.

[0031] FIG. 7 shows a third embodiment of the present invention, the cylinder body 11 ₂ tandem master cylinder M ₂
At the top of the, the front and rear bosses 1 are cylindrical
2 ₂ and 13 ₂ and a flat plate-shaped connecting arm 14 ₂ are integrally provided, and the reservoir R ₂ made of synthetic resin is provided on the front and rear bosses 12 ₂ and 13 ₂ via grommets 15 and 16, respectively. Cylindrical front and rear supply tubes 1 to be fitted
7 ₂ and 18 ₂ and a connecting arm 19 ₂ fastened to the connecting arm 14 ₂ by a bolt 20 are integrally provided.

The cylinder body 11 ₂ has a front output port 2
5 back front with leads to ₂ front piston for exposing the front face to the front fluid pressure chamber 21 ₂ of the spring 26 ₂ is stored 22 ₂
If, rear fluid pressure chamber 23 ₂ which is housed the rear return spring 27 ₂
The rear piston 2 which forms between the front piston 22 ₂ and
4 ₂ is slidably fitted.

Front piston 22 ₂ and cylinder body 11
Between ₂ is formed with a supply fluid chamber 32 ₂ of the ring, said supply fluid chamber 32 ₂ plural supply holes 28 communicating with the supply fluid chamber 32 ₂ in the front piston 22 ₁ in the front side of ₂ ... is puncture Was set up,
The front piston 22 _{2 is located} in front of the supply holes 28 ₂ ...
The cup seal 30 ₂ in sliding contact with the inner surface of the cylinder member 11 ₂ is mounted. Further, a cup seal 31 _{2 which} is in sliding contact with the inner surface of the cylinder body 11 ₁ is mounted on the front piston 22 ₂ on the rear side of the replenishing liquid chamber 32 ₂ .

[0034] The cylinder body 11 _2, the supply fluid chamber 32
_The replenishment port (not shown) which is always in communication with the ₂ and the relief port 58 which is in communication with the front hydraulic chamber 21 ₂ when the front piston 22 ₂ is retracted are opened in the front boss 12 ₂ . Drilled.

The rear piston 24 ₂ has a cylinder body 11
_2. A piston rod 48 ₂ slidably supported by a bearing member 47 ₂ fitted to the rear end portion of ₂ is coaxially provided continuously, and an annular supply is provided between the rear piston 24 ₁ and the bearing member 47 _2. liquid chamber 49 ₂ is defined. A cup seal 5 is provided on the outer periphery of the rear piston 24 _{2 at} a position in front of the replenishing liquid chamber 49 _2.
No. 0 ₂ is mounted, and the rear piston 24 ₂ is provided with a plurality of replenishing holes 51 _2, ... For communicating the replenishing liquid chamber 49 ₂ with the back surface of the cup seal 50 ₂ .

Further to the cylinder body 11 _2, supply fluid chamber 49
₂ and the rear piston 24 ₂
And a relief port 60 that communicates with the rear hydraulic chamber 23 ₂ when it is retracted so as to open in the rear boss 13 ₂ .

The maximum distance limiting means 57 ₂ is provided further between the front piston 22 ₂ and the rear piston 24 ₂ for regulating the maximum distance between their pistons 22 _2, 24 _2.

By the way, the rear end of the rear piston 24 ₂ is restricted by the bearing member 47 ₂ , but the rear end of the front piston 22 ₂ is such that one end faces the inner end of the front boss 12 _2. The other end of the stopper pin 61, which is a pin member fitted into the cylinder body 11 ₂ , is connected to the replenishing liquid chamber 32 ₂
It is regulated by engaging the front piston 22 ₂ at the front end side of the. Thus, the cylinder body 11 _{2 of the} stopper pin 61
In order to prevent the front end replenishment cylinder 17 ₂ of the reservoir R ₂ from ending at least at the end on the cylinder body 11 ₂ side, a restriction portion 45 ₁ along the one diameter line of the front replenishment cylinder 17 ₂ is provided.
Alternatively, a cross-shaped restricting portion 45 ₂ is provided.

Also according to the third embodiment, the front supply cylinder 1
It is possible to increase the degree of freedom in the arrangement position of the stopper pin 61 with respect to 7 ₂ and the front boss 12 ₂ .

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.

For example, the present invention is applicable not only to a tandem type master cylinder but also to a master cylinder having a single output port.

[0042]

As described above, according to the first aspect of the present invention, the working fluid flow passage having a shape that prevents one end of the pin member from entering the inner surface of at least the cylinder body side of the replenishing cylinder is provided. Since the restriction portion formed between the pin member and the inner surface of the pin member is continuously provided, the pin member can be reliably separated from the cylinder body regardless of the position of the pin member within the range corresponding to the diameter of the supply cylinder. Therefore, it is possible to increase the degree of freedom of the arrangement position of the pin member with respect to the supply cylinder and the boss.

According to the second aspect of the invention, in addition to the structure of the first aspect of the invention, since the regulating portion is formed in a cross shape in a plane orthogonal to the axis of the replenishing cylinder, the regulation is performed. The reinforcing effect of the supply cylinder by the part can be enhanced.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical side view of an assembly of a master cylinder and a reservoir according to a first embodiment.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 2;

FIG. 5 is a cross-sectional view corresponding to FIG. 2 of a modified example of the first embodiment.

FIG. 6 is a sectional view of a second embodiment corresponding to FIG.

FIG. 7 is a partially cutaway vertical side view corresponding to FIG. 1 of a third embodiment.

[Explanation of symbols]

11 ₁ , 11 ₂ ... Cylinder body 12 ₁ , 12 ₂ ... Boss 15 ... Grommet 17 ₁ , 17 ₂ ... Supply cylinder 22 ₁ , 22 ₂ ... Piston 40 ... As pin member Opening rods 45 ₁ , 45 ₂ ... Regulators 46 ₁ , 46 ₂ ... Hydraulic fluid flow passage 61 ... Stopper pins as pin members M ₁ , M ₂ ... Master cylinders R ₁ , R ₂ ... Reservoir

Claims (2)

[Claims] 1. A master cylinder (M₁, M₂) Shirin
Da body (11₁, 11 ₂) On the outer surface of its upper part
Cylindrical boss (12₁, 12₂) Is provided in the cylinder
Body (11₁, 11₂) Attached to the reservoir (R₁,
R₂) Supply cylinder (17)₁, 17₂) Is a glomer
The boss (12 ₁, 12₂)
The cylinder body (11₁, 11₂) Can be slid on
Fitted to the piston (22₁, 22₂) Set the backward limit
The pin member (40, 61) for restraining has one end of the boss.
(12₁, 12₂) Of the cylinder body (1
1₁, 11₂), The master cylinder and
In the assembly of the server, the supply cylinder (17₁, 17₂)of
At least the cylinder body (11₁, 11₂) Side inner surface
To prevent one end of the pin member (40, 61) from entering.
Hydraulic fluid flow passage (46₁, 46₂) Supply cylinder
(17₁, 17₂) And the regulating portion (4
5₁, 45₂) Are serially installed.
Linda and reservoir assembly. 2. The regulating portion (45 ₂ ) is provided with a supply cylinder (17).
The master cylinder / reservoir assembly according to claim 1, wherein the master cylinder / reservoir assembly is formed in a cross shape in a plane orthogonal to the axis of ( ₁ , 17 ₂ ).