JPH1134853A - Hydraulic brake device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manufacture a sleeve and appropriately and easily assemble it in a liquid pressure brake device for a vehicle provided with a spool valve mechanism. SOLUTION: In a spool valve mechanism, an adjustment member 36 is so arranged as to be opposed to the front end face of a spool 32 and brought in contact with the front end face of a sleeve 31, and the sleeve 31 is pressedly moved in the rear end direction of the spool 32 and fixed in a position separated a prescribed distance from the front end face of the spool 32. The sleeve 31 can be thus accurately adjust the prescribed initial relative position to the spool 32. If it is so constituted that a transmission member 37 is slidably stored in a hollow part of the adjustment member 36, various hydraulic pressure characteristics can be set by only changing the adjustment member 36 and the transmission member 37 and without changing the sleeve 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic brake device for supplying brake hydraulic pressure to a wheel cylinder of a vehicle wheel, and more particularly to adjusting and outputting brake hydraulic pressure in accordance with relative movement of a spool with respect to a sleeve. The present invention relates to a vehicle hydraulic brake device provided with a spool valve mechanism.

[0002]

2. Description of the Related Art In recent years, a hydraulic brake device is provided with a hydraulic booster, a regulator, and the like in addition to a master cylinder, and is used for control means such as booster means and anti-skid control. A hydraulic booster is disclosed in, for example, JP-A-5-124505, and a regulator is disclosed in, for example, JP-A-9-24819. Each of them is provided with a spool valve mechanism, which boosts the braking force in accordance with the operation of the brake operating member.

[0003]

In the above-described spool valve mechanism, the stroke amount from the initial position of the spool to the power hydraulic pressure introduction position determines the initial play amount of the brake operation and seals the power hydraulic pressure. Therefore, it is necessary to accurately adjust to a predetermined set value. Specifically, it is necessary to accurately adjust the initial relative position between a cylindrical sleeve (or called a cylinder) and a spool slidably accommodated in a hollow portion thereof.

[0004] In this regard, Japanese Patent Laid-Open No. 5-1245 / 1992, cited above.
In the hydraulic booster of the type disclosed in Japanese Patent Publication No. 05-2005, means for moving the spool with an eccentric pin or the like with respect to the fixed sleeve is used as means for adjusting the initial relative position between the sleeve and the spool. However, these parts are not easy to process and assemble. Further, since the amount of movement of the spool is not constant with respect to the rotation angle of the eccentric pin, adjustment is difficult.

On the other hand, the regulator disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 9-24819 is housed in the cylinder hole of the master cylinder, so that it is possible to reduce the size and to perform various control functions as described in the publication. Since it can be added, it can be used for various purposes. However, in this regulator, not only the spool, but also the engaging member (transmission member) and the elastic member are accommodated in the hollow portion of the sleeve, and these components are accommodated in the cylinder body together with the movement preventing member and the like. Since it is configured in
The shape of the sleeve is complicated, processing is difficult, and assembly is not easy. Further, it is not always easy to adjust the initial relative position between the sleeve and the spool.

Meanwhile, in a hydraulic brake device capable of setting various characteristics according to brake hydraulic characteristics as described in Japanese Patent Application Laid-Open No. 5-124505, the sleeve (cylinder) of the spool valve mechanism is strict. It can be considered that the part where the processing accuracy is required and the surface treatment is performed and the part which needs to be appropriately changed according to the brake fluid pressure characteristics are integrated. The former part may have a common specification for all vehicles, whereas the latter part generally differs from vehicle to vehicle although it does not require as high accuracy as the former.
In other words, it can be said that the sleeve is a combination of a general-purpose component requiring high precision and a plurality of types of dedicated components. Therefore, this may be divided into two parts, but it is necessary to consider the securing of the performance, the ease of assembling, the accuracy of assembling, etc.

SUMMARY OF THE INVENTION Accordingly, the present invention is to easily manufacture a sleeve of a spool valve mechanism in a vehicle hydraulic brake device having a spool valve mechanism for adjusting and outputting a brake fluid pressure in accordance with a relative movement of a spool with respect to the sleeve. It is another object of the present invention to provide a configuration that can be appropriately and easily assembled.

Another object of the present invention is to provide a hydraulic brake system for a vehicle having a spool valve mechanism so that the spool valve mechanism can be appropriately and easily configured according to various required specifications for each vehicle. And

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a spool capable of holding a rear end portion at a predetermined initial position in a cylinder hole of a cylinder body, and a relative spool with respect to the spool. A hydraulic brake device for a vehicle, comprising a sleeve movably disposed on the cylinder body and fixed to the cylinder body, and a spool valve mechanism for adjusting and outputting a brake hydraulic pressure according to the relative movement of the spool with respect to the sleeve. In this configuration, the spool is disposed so as to face the front end face of the spool and abut on the front end face of the sleeve, and push the sleeve toward the rear end of the spool so as to be spaced a predetermined distance from the front end face of the spool. And an adjusting member for fixing the sleeve to a predetermined initial relative position with respect to the spool by the adjusting member.

In the hydraulic brake device, the sleeve is a stepped cylinder having a large-diameter portion and a small-diameter portion, and the sleeve is so arranged that the adjusting member comes into contact with an end face of the large-diameter portion of the stepped cylinder. It is preferable that the high-pressure fluid is accommodated in the cylinder hole and the high-pressure fluid is introduced between the outer peripheral surface between the large diameter portion and the small diameter portion of the stepped cylinder and the inner surface of the cylinder hole.

The adjusting member is a cylindrical body, and a transmission member is slidably housed in a hollow portion of the cylindrical body, and an elastic member is held so as to abut on a front end surface of the transmission member. A rear end surface of the transmission member is disposed so as to face a front end surface of the spool, and a brake fluid pressure adjusted according to a relative movement of the spool with respect to the sleeve is applied to the elastic member, and the transmission member is connected to the elastic member through the transmission member. The spool may be pushed rearward.

Further, according to the present invention, a master piston is accommodated in a cylinder hole of a cylinder body so as to be slidable in a liquid-tight manner, and a pressure chamber is formed in front of the master piston and a power chamber is formed in rear of the master piston. A master cylinder that drives the master piston forward in response to the operation of the operating member and outputs brake fluid pressure from the pressure chamber, an auxiliary hydraulic pressure source that boosts the brake fluid to a predetermined pressure and outputs power fluid pressure, A control piston, which is slidably housed in front of the master piston in the cylinder hole and is disposed so as to be linked with the master piston, and an output power hydraulic pressure of the auxiliary hydraulic pressure source is introduced into the pressure regulation chamber. And a pressure regulating valve means for regulating the pressure to a predetermined pressure in accordance with the movement of the control piston, wherein the pressure regulating valve means comprises a predetermined initial pressure in the cylinder bore. A spool capable of holding a rear end portion at a position, and a sleeve disposed so as to be relatively movable with respect to the spool and fixed to the cylinder body, and the brake fluid is moved in accordance with the relative movement of the spool with respect to the sleeve. A spool valve mechanism that adjusts and outputs pressure, is disposed so as to face the front end surface of the spool and abut on the front end surface of the sleeve, and pushes the sleeve toward the rear end of the spool to push the sleeve toward the rear end. An adjusting member is provided to be fixed at a predetermined distance from the front end surface of the spool, and the sleeve is adjusted to a predetermined initial relative position with respect to the spool by the adjusting member.

In the above-mentioned hydraulic brake device, it is assumed that the spool is a stepped member having a large diameter portion at a rear end, and the spool is arranged so that a rear end face of the stepped member abuts on the control piston. Good.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a hydraulic brake device according to an embodiment of the present invention, and FIG. 1 shows an enlarged view of a regulator section as pressure regulating valve means. First, the overall configuration of the hydraulic brake device will be described with reference to FIG. 2. A regulator unit is configured on the vehicle front side (left side in FIG. 2) within the hydraulic cylinder body 1 h, and a master cylinder unit is configured on the rear side. The brake pedal 2 is provided as a brake operation member. The pedaling force applied to the brake pedal 2 is transmitted as a brake operating force via the push rod 3 and the input member 4, and the output brake fluid pressure of the master cylinder unit and the regulator unit is accordingly changed to the right and left front wheels of the vehicle. FR, FL and rear right and left wheels R
R and RL are output to the wheel cylinders Wfr, Wfl, Wrr, and Wrl (in FIG. 2, the front and rear wheels F on the right side of the vehicle).
R, RR, and only the wheel cylinders Wfr, Wrr mounted on each wheel are shown).

The cylinder body 1h is formed with a stepped cylinder hole composed of holes 1a, 1b, 1c and the like having different inner diameters, in which a master piston 10 and a control piston 21 are accommodated. Piston 2
1, a pressure chamber R2 is formed. The hole 1a communicates with a power chamber R1 having a larger inner diameter. A control piston 21 is slidably fitted in the hole 1b having the smallest diameter in a liquid-tight manner. The master piston 10 consists of two pistons 11 and 12 and has a hole 1b
And a piston 11 in each of the larger holes 1a.
Are accommodated and supported. That is, piston 1
1 has a small-diameter land portion 11a formed at the front end thereof and a large-diameter land portion 11b formed rearward at a predetermined distance in the axial direction. The former has an annular cup-shaped seal. A member 14 is disposed and fitted slidably in a liquid-tight manner in the hole 1b, and the latter is slidably fitted in the hole 1a and arranged to abut the piston 12.

A cylindrical support portion 11s extends from the land 11a side of the piston 11 and has a concave portion 11e in the axial direction.
Are formed. In addition, a through hole 11c is formed in the radial direction of the piston 11, and an axial communication hole 11d communicating with the through hole 11c is formed, and is open to the concave portion 11e.
The retainer 16 is mounted on the support portion 11s, and the valve body 25 is locked to the retainer 16 to restrict the movement of the valve body 25 in the direction of the control piston 21. An elastic member such as rubber is attached to one end of the valve body 25, and is configured to abut on the communication hole 11d to seal it. A rod 25b is integrally formed on the other end of the valve body 25, and a locking portion 25
c is formed. The land 1 of the piston 11
A communication hole 11f is formed in the peripheral direction of the periphery of 1a. An annular seal member 14 is attached to an opening end on the pressure chamber R2 side in front of the communication hole 11f, and these constitute a check valve. Therefore, the liquid supply chamber R5 can communicate with the pressure chamber R2 via the communication holes 11c and 11d and the communication hole 11f. The liquid supply chamber R5 is connected to the hydraulic pressure passage 1.
e, and communicates with the reservoir 6.

Further, a piston 12 is accommodated behind the piston 11. The piston 12 has a land portion 12a formed on a front outer surface thereof. An annular seal member 12b is mounted on the land portion 12a and is fitted in the hole 1a in a liquid-tight slidable manner. The liquid supply chamber R5 is separated. Further, a concave portion 12c is formed behind the piston 12, and the input member 4 is housed in the concave portion 12c, and is screwed with the contact member 5 at the front. The front end face of the piston 12 faces the rear end face of the piston 11, and the pressing force from the brake pedal 2 is transmitted to the piston 11 via the input member 4 and the contact member 5. The main body of the piston 12 is supported by a cylindrical sleeve 17. An annular groove is formed on the inner surface and the outer surface of the sleeve 17, and an annular groove is also formed on the inner surface separated from the inner surface by a predetermined distance in the axial direction. Each of these grooves has a sealing member 17.
a, 17b and the sealing member 18 are accommodated, and the sealing performance with respect to the power chamber R1 is ensured. Incidentally, the piston 11 and the piston 12 may be formed integrally.

Next, a regulator portion having a spool valve mechanism is formed in the front portion of the cylinder body 1h, and an auxiliary hydraulic pressure source 40 is connected to the regulator portion, and its output power hydraulic pressure is appropriately controlled. Is output. Auxiliary hydraulic pressure source 40
Is provided with a hydraulic pump 43 driven by an electric motor 42, the input side is connected to the reservoir 6, the output side is connected to the accumulator 44, and the power hydraulic pressure is supplied from the accumulator 44 to the communication hole 31d via the hydraulic path 1p. It is configured to be. The control piston 21 accommodated in the hole 1c is formed with a pair of lands 21a and 21b at a predetermined distance in the axial direction. An annular seal member 24 is mounted only on the front land 21a. , The rear land portion 21b communicates. Therefore, the pressure chamber R2 and the below-described regulator chamber R3 are formed by the seal member 24.
Are separated from each other, and a pressure chamber R2 is defined between the seal member 24 and the seal member 14 mounted on the land 11a of the piston 11.

As shown in FIG. 2, the control piston 21 is formed with a through hole 21c penetrating in the radial direction and extending in the axial direction and opening at the rear end. Land part 2 in front
1a is a locking pin 2 which is located at the rear end and extends radially.
8 is fixed to the cylinder body 1h, which allows the control piston 21 to move forward, but restricts retreat (movement in the direction of the master piston 10). The through-hole 21c of the control piston 21 also extends in the axial direction, and a cylindrical support portion 21s is integrally formed so as to surround the through-hole 21c, and the locking portion 25c of the valve body 25 is accommodated therein. Have been. A retainer 26 is attached to the support portion 21s, and a retaining portion 25c is retained by the retainer 26, thereby restricting the movement of the valve body 25 in the direction of the master piston 10. A recess is formed at the front end of the control piston 21, and a rear end of a spool 32 described later is held in the recess.

A cylindrical sleeve 31 and an adjusting member 36 are fitted in a stepped hole 1c communicating with the hole 1b, and a regulator chamber R3 serving as a pressure adjusting chamber is provided between the sleeve 31 and the control piston 21. Are formed. Sleeve 31
A plurality of annular grooves are formed on the outer periphery of the adjusting member 36, and annular seal members are fitted to the respective annular grooves. Between these adjacent seal members, communication holes 31d and 31f are formed in the radial direction of the sleeve 31, and communication holes 36b and 36c are formed in the radial direction of the sleeve-shaped adjusting member 36. A spool 32 is slidably accommodated in the hollow portion of the sleeve 31, and is disposed so that the opening of the communication hole 31 f is blocked by the forward movement of the spool 32.

In the axial direction of the sleeve 31, there is formed a communication hole 31e having one end communicating with the communication hole 31f and the other end communicating with the regulator chamber R3. When the communication hole 31f is open, the regulator chamber R3 is opened. Are communicating holes 31e, 3
It is configured to be able to communicate with the hydraulic path 1s via 1f. The communication hole 31d is connected to the auxiliary hydraulic pressure source 40 through the hydraulic pressure path 1p, but is shielded by the outer peripheral surface of the spool 32 at the position shown in FIG. Furthermore, the communication hole 3
An annular groove 31c is formed in the inner peripheral surface of the sleeve 31 behind 1d. The communication holes 36b and 36c are connected to the hydraulic passages 1q and 1r, respectively.

A plunger 35 is fitted to the front end of the spool 32 so as to protrude in the axial direction.
The rear end is located in the regulator chamber R3 and is locked to the control piston 21. That is, the retainer 33 is supported in the concave portion in front of the control piston 21,
A spring 34 is stretched between the control piston 21 and the spool 32 and the spool 32 is urged to abut the control piston 21. At the initial position (retracted position) of the control piston 21, the opening of the communication hole 31f is not shielded by the spool 32, and the regulator chamber R3 is connected to the communication holes 31e and 31f of the sleeve 31 and the hydraulic pressure path 1s. And is filled with brake fluid at atmospheric pressure.
In the outer peripheral surface of the spool 32, an annular groove 32b is formed at a retreat position over a predetermined range in the axial direction centered on the rear end of the sleeve 31, and a predetermined distance is provided in front of the annular groove 32b. An annular groove 32c is formed at a position facing the groove 31c.

At the position shown in FIG. 2, the inside of the regulator chamber R3 communicates with the reservoir 6 through the communication holes 31e and 31f of the sleeve 31 and the hydraulic pressure path 1s, and is at atmospheric pressure. When the spool 32 moves forward along with the forward movement of the control piston 21, the communication hole 31f of the sleeve 31 is closed, and instead the communication hole 31d faces the groove 32c of the spool 32, and the groove 31c and the groove 32b.
Oppose each other and thus communicate with the auxiliary hydraulic pressure source 40. As a result, the power hydraulic pressure of the auxiliary hydraulic pressure source 40 becomes
It is supplied to the inside and is boosted.

On the other hand, the hollow portion of the adjusting member 36 is formed in a stepped hole shape, and the transmission member 37 is slidably accommodated in the small-diameter hole portion in the axial direction, and the rear end surface thereof faces the front end surface of the plunger 35. Are arranged as follows. Further, an elastic member 38 made of, for example, rubber is fitted in the large-diameter hole portion of the adjusting member 36, and the transmission member 37 is arranged so that the front end surface thereof is in contact with the elastic member 38. In the present embodiment, the transmission member 3
Although a contact member (not shown) having a truncated cone shape is provided at the front end of the transmission member 37, the front end of the transmission member 37 may be formed in the same shape. A plug 39 is fitted to the front end of the hollow portion of the adjusting member 36, and a regulator chamber R 4 is formed between the plug 39 and the elastic member 38.

The regulator chamber R4 is connected to the regulator chamber R3 via the communication hole 36b and the hydraulic path 1q, and is also connected to the power chamber R1 via the communication hole 36c and the hydraulic path 1r. The pressure chamber R2 is connected to the wheel cylinder Wfr via a hydraulic path 1n, and the power chamber R1 is connected to the wheel cylinder Wrr via a hydraulic path 1k.
Is connected to the

FIG. 1 shows an enlarged view of a regulator section provided with the above-described spool valve mechanism. The spool 32 is a stepped member having a main body having a diameter Ds and a large diameter section 32e having a diameter Dc. Dc> Ds), the large-diameter portion 32e is disposed so as to contact the control piston 21, and is urged to contact the control piston 21 by the spring 34 via the retainer 33 as described above. When the pressure in the regulator chamber R3 is increased, the large-diameter portion 32e is pressed by the control piston 21 by the hydraulic pressure. On the other hand, the sleeve 31 is a stepped cylindrical body in which a large-diameter portion having a diameter Da is formed on the front side with respect to the communication hole 31d and a small-diameter portion having a diameter Db is formed on the rear side (Da> Db). Therefore, when power hydraulic pressure is introduced from the auxiliary hydraulic pressure source 40 (FIG. 2) between the outer peripheral surface between the large-diameter portion and the small-diameter portion and the inner surface of the cylinder hole via the communication hole 31d, the large-diameter portion side Is configured to be urged so that the end surface of the contact member comes into contact with the adjustment member 36.

As described above, the adjusting member 36 is a cylindrical body,
A transmission member 37 is slidably received in the hollow portion of the cylindrical body, and an elastic member 38 is held so as to abut on the front end surface of the transmission member 37. It is arranged so as to face the plunger 35 mounted on the section. Thus, when the regulator hydraulic pressure adjusted according to the relative movement of the spool 31 with respect to the sleeve 32 is introduced into the regulator chamber R4 and applied to the elastic member 38, the spool 3 is transmitted via the transmission member 37.
2 is pushed rearward, and the regulator fluid pressure in the regulator chamber R3 is reduced.

The stroke St from the initial position of the spool 32 to the time when the groove 32c of the sleeve 32 communicates with the communication hole 31d determines the initial play amount of the brake operation and the power fluid introduced from the communication hole 31d. Since the range for sealing the pressure is determined, it is necessary to accurately adjust the pressure to a predetermined set value. In the present embodiment, the spool 32 is held by the control piston 21 and the adjustment member 3
6 is disposed so as to face the front end surface of the spool 32 and abut on the front end surface of the sleeve 31.
It is configured to move relatively to. That is, when the adjusting member 36 is screwed into the cylinder body 1h and pushed in the direction of the control piston 21, the sleeve 31 slides rearward, and the adjusting member moves relative to the plunger 35 mounted on the front portion of the spool 32. It is fixed when it reaches a position separated by a predetermined distance (L) from the bottom surface of the concave portion 36b of 36. Thus, by screwing the adjusting member 36 to the cylinder body 1h, the sleeve 31 moves rearward only by sliding without rotating, and is adjusted to a predetermined initial relative position with respect to the spool 32 accurately. You. Therefore, the seal member of the sleeve 31 is held in a stable state.

Further, since the sleeve 31 is a stepped cylindrical body as described above, the auxiliary hydraulic pressure source 4 is connected through the communication hole 31d.
0 (FIG. 2), when the power hydraulic pressure is introduced between the outer peripheral surface between the large diameter portion and the small diameter portion of the sleeve 31 and the inner surface of the cylinder hole, the end surface (front end surface) of the sleeve 31 on the large diameter portion side. Is urged in a direction in which it contacts the adjustment member 36. Thus, even after the adjustment by the adjustment member 36, the sleeve 31 is held in a state pressed by the adjustment member 36, and the spool 32 and the sleeve 31
The initial relative position is reliably maintained without being changed by an external force or the like.

Next, the overall operation of the hydraulic brake device having the above configuration will be described. FIGS. 1 and 2 show a state in which the brake pedal 2 is not operated. In this state, the brake pedal 2 is operated, and the pistons 11, 12 are moved via the push rod 3, the transmission member 4 and the contact member 5. Is pushed forward (to the left in FIG. 2), the piston 2
5 is in contact with the communication hole 11 d
Is closed, the communication between the pressure chamber R2 and the liquid supply chamber R5 is cut off, and a closed state is established. Thus, the pressure chamber R2 and the liquid supply chamber R
When the pistons 11 and 12 are driven by the operating force of the brake pedal 2 in a state where the communication with the piston 5 is interrupted, the pistons 11 are held in the state shown in FIG. And move forward.

Accordingly, the communication hole 31f is closed by the spool 32 supported by the control piston 21, and the communication with the reservoir 6 is cut off. At the same time, the power hydraulic pressure from the auxiliary hydraulic pressure source 40 flows into the regulator chamber R3 from the hydraulic pressure path 1p through the communication hole 31d, the annular grooves 31c, 32c, and the groove 32b, and as the regulator hydraulic pressure, 1q
Is supplied to the regulator chamber R4 through the
The power is supplied to the power chamber R1 via r. by this,
The pistons 11 and 12 move forward with assistance, the pressure chamber R2 is further compressed, the master cylinder hydraulic pressure is output to the wheel cylinder Wfr via the hydraulic pressure passage 1n, and the regulator hydraulic pressure is supplied from the power chamber R1 to the hydraulic pressure. It is output to the wheel cylinder Wrr via the pressure path 1k.

During this time, the force applied to the control piston 21 by the regulator fluid pressure in the regulator chamber R3 is:
If the force applied to the control piston 21 by the master cylinder fluid pressure in the pressure chamber R2 is larger than the control piston 2
1 moves rearward, the communication hole 31f opens and communicates with the reservoir 6, so that the pressure in the regulator chamber R3 is reduced. When the relationship of the force applied to the control piston 21 is reversed, the control piston 21 moves forward, the communication hole 31f is shut off, and the regulator chamber R3 is replaced with the communication hole 31d.
Thus, the pressure in the regulator chamber R3 is increased. Such a control piston 21
By repeating the movement of the spool 32 accompanying the movement of
Control is performed so that the force by the regulator hydraulic pressure applied to the control piston 21 and the force by the master cylinder hydraulic pressure are equal. Until the force due to the regulator hydraulic pressure in the regulator chamber R4 is transmitted to the plunger 35 via the elastic member 38 and the transmission member 37, the regulator hydraulic pressure that is substantially proportional to the master cylinder hydraulic pressure is output, and the brake hydraulic pressure is output. Characteristics are obtained.

Further, the regulator fluid pressure is increased, and the central portion of the elastic member 38 is displaced rearward by the regulator fluid pressure supplied to the regulator chamber R4, so that the transmission member 37 abuts on the plunger 35 and the spool 32 is moved rearward. When pressed, the opening area of the communication hole 31f increases. As a result, the regulator fluid pressure in the regulator chamber R3 is reduced, and a brake fluid pressure characteristic that is substantially proportional to the master cylinder fluid pressure but has a gentler pressure increasing gradient than the brake fluid pressure characteristic is obtained.

The second brake fluid pressure characteristic differs depending on the shape of the front end portion and the like in addition to the diameter De of the transmission member 37 shown in FIG.
Is generally used. According to the present embodiment,
Various transmission members 37 having different diameters De and the like are prepared, and various adjustment members 36 having different small-diameter portions of the stepped holes corresponding thereto are prepared.
Is prepared. Thus, without changing the sleeve 31, only by changing the adjusting member 36 and the transmitting member 37,
Various hydraulic characteristics can be obtained. In other words, the sleeve 31 is a general-purpose part, and the adjustment member 36 and the transmission member 3
7 (and, if necessary, the elastic member 38) can be used as a special part that differs for each vehicle type.

[0035]

Since the present invention is configured as described above, the following effects can be obtained. That is, in the vehicle hydraulic brake device according to the first aspect, the adjusting member is disposed so as to face the front end surface of the spool and abut on the front end surface of the sleeve, and the sleeve is pushed toward the rear end of the spool. Since the spool valve mechanism is configured to be moved and fixed at a position separated by a predetermined distance from the front end surface of the spool, the sleeve is accurately and easily adjusted to a predetermined initial relative position with respect to the spool by the adjusting member. Can be
The sleeve can be held in a stable state. Moreover, for example, the sleeve can be a general-purpose part and the adjustment member can be a special part, so that it is possible to provide an inexpensive apparatus that is easy to manufacture and assemble.

In the hydraulic brake device according to the second aspect, the cylinder of the stepped cylinder having the large-diameter portion and the small-diameter portion is arranged so that the adjusting member abuts on the end surface on the large-diameter portion side. The high-pressure fluid is accommodated in the hole and is introduced between the outer peripheral surface between the large diameter portion and the small diameter portion and the inner surface of the cylinder hole, and the sleeve is adjusted even after adjustment by the adjustment member. Since the spool and the sleeve are held in a pressed state, the initial relative position between the spool and the sleeve can be reliably maintained.

Further, in the hydraulic brake device according to the third aspect, the transmission member is slidably housed in the hollow portion of the adjusting member of the cylindrical body, and abuts against the front end face of the transmission member. An elastic member is held, and the transmission member is arranged such that the rear end surface thereof faces the front end surface of the spool,
Since the brake fluid pressure adjusted according to the relative movement of the spool with respect to the sleeve is applied to the elastic member and the spool is pushed rearward via the transmission member, without changing the sleeve, Various hydraulic characteristics can be set only by changing the adjustment member and the transmission member.

Also, in the vehicle hydraulic brake device according to the fourth aspect, since the pressure regulating valve means includes the spool valve mechanism configured as described above, the sleeve is fixed to the spool by the adjusting member. Can be accurately and easily adjusted to the initial relative position, and the sleeve can be held in a stable state. In addition, for example, the sleeve can be a general-purpose part, and the adjustment member can be a special part according to the required specifications for each vehicle. Therefore, it is possible to provide an inexpensive device that is easy to manufacture and assemble.

In the hydraulic brake device according to the fifth aspect, the spool is formed as a stepped member having a large diameter portion at a rear end portion, and the rear end surface is disposed so as to abut the control piston. When the high-pressure fluid is applied to the spool, the spool is pressed by the control piston, so that the spool can be held in a stable state with respect to the control piston.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a front portion of a vehicle hydraulic brake device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a vehicle hydraulic brake device according to one embodiment of the present invention.

[Explanation of symbols]

 1h Cylinder body 1e, 1p, 1q, 1r, 1s, 1k, 1n Hydraulic path 2 Brake pedal 6 Reservoir 10 Master piston 11, 12 Piston 17 Sleeve 21 Control piston 31 Sleeve 32 Spool 35 Plunger 36 Adjusting member 37 Transmission member 38 Elasticity Member 40 Auxiliary hydraulic pressure source R1 Power room R2 Pressure room R3, R4 Regulator room R5 Supply room

Claims (5)

[Claims] 1. A spool capable of holding a rear end portion at a predetermined initial position in a cylinder hole of a cylinder body, and a sleeve disposed movably relative to the spool and fixed to the cylinder body. In a vehicle hydraulic brake device provided with a spool valve mechanism for adjusting and outputting a brake fluid pressure in accordance with a relative movement of the spool with respect to the sleeve, a front end face of the sleeve is opposed to a front end face of the spool. An adjusting member which is disposed so as to abut against the rear end of the spool and is fixed at a position separated by a predetermined distance from a front end surface of the spool. Is adjusted to a predetermined initial relative position with respect to the spool. 2. The method according to claim 1, wherein the sleeve is a stepped cylinder having a large diameter portion and a small diameter portion. The high pressure fluid is introduced between the outer peripheral surface between the large diameter portion and the small diameter portion of the stepped cylindrical body and the inner surface of the cylinder hole. Hydraulic brake equipment for vehicles. 3. The adjusting member is a cylindrical body, and a transmission member is slidably housed in a hollow portion of the cylindrical body, and an elastic member is held so as to abut on a front end surface of the transmission member.
A rear end surface of the transmission member is disposed so as to face a front end surface of the spool, and a brake fluid pressure adjusted according to a relative movement of the spool with respect to the sleeve is applied to the elastic member, and the transmission member is connected to the elastic member through the transmission member. 2. The hydraulic brake device for a vehicle according to claim 1, wherein the spool is pushed rearward. 4. The operation of a brake operating member, wherein a master piston is accommodated in a cylinder hole of a cylinder body so as to be slidable in a liquid-tight manner, and a pressure chamber is formed in front of the master piston and a power chamber is formed in rear of the master piston. A master cylinder that drives the master piston forward to output brake fluid pressure from the pressure chamber, an auxiliary hydraulic pressure source that boosts brake fluid to a predetermined pressure and outputs power fluid pressure, A control piston which is slidably housed in front of the master piston in a liquid-tight manner and is disposed so as to interlock with the master piston, and a control piston which introduces output power hydraulic pressure of the auxiliary hydraulic pressure source into a pressure regulating chamber. Pressure regulating valve means for regulating the pressure to a predetermined pressure in accordance with the movement of the vehicle, the pressure regulating valve means, the rear end portion at a predetermined initial position in the cylinder hole A spool that can be held, and a sleeve that is disposed movably relative to the spool and that is fixed to the cylinder body, and that adjusts brake fluid pressure in accordance with the relative movement of the spool with respect to the sleeve to output The spool valve mechanism is disposed so as to face the front end face of the spool and abut on the front end face of the sleeve, and push the sleeve toward the rear end of the spool to move the front end face of the spool. A hydraulic brake device for a vehicle, comprising: an adjusting member fixed at a position separated from the spool by a predetermined distance from the spool, the adjusting member adjusting the sleeve to a predetermined initial relative position with respect to the spool. 5. The spool according to claim 5, wherein the spool is a stepped member having a large-diameter portion at a rear end, and the rear end surface of the stepped member is arranged so as to abut on the control piston. 5. The hydraulic brake device for a vehicle according to 4.