JPH09123902A - Hydraulic control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate sealing between an input chamber and the outer end part of an output hole to reduce the number of sealing members by forming annular sealing members between a valve housing and a support body, between an output chamber and a releasing chamber, the releasing chamber and the input chamber, the outer end parts of the output hole and the second releasing hole respectively. SOLUTION: When a linear solenoid 2 applies thrust corresponding to energizing amount to a plunger 21, a spool valve element 20 is pressed in a output hole 28 communicating direction with an input hole 25 against fluid pressure working upon the spring force of a return spring 22 and a reaction pin 19, so that fluid pressure corresponding to the energizing amount to the solenoid 2 from the output hole 28 is outputted. The outer end of the output hole 28 drilled in the guide member 10 of a valve housing 3 is blocked by a plugging member 31, therefore, sections between an output chamber 12 and a releasing chamber 13, the releasing chamber 13 and an input chamber 14, and outer ends of the output hole 28 and the outer end of the second opening hole 27 are sealed by the first to third sealing members 35-37 respectively. It is thus possible to provide complete sealing and reduction in the number of sealing members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support having a fitting hole whose one end is closed, and an output passage which opens on the inner surface of the fitting hole at positions spaced from the one end side in the axial direction in order. A passage and an input passage are provided, an output chamber communicating with the output passage is formed between the one end of the fitting hole and the closing portion, and the release chamber communicating with the release passage and the input chamber communicating with the input passage are formed with the inner surface of the fitting hole. A valve housing fitted between the fitting holes and the control pressure chamber communicating with the output chamber,
A small-diameter sliding hole into which a reaction force pin whose one end faces the control pressure chamber is slidably fitted, and a liquid chamber which faces the other end of the reaction force pin.
A large-diameter slide hole for slidably fitting a spool valve body, one end of which is coaxially brought into contact with the other end of the reaction force pin in the liquid chamber, is provided coaxially, and the outer end is communicated with the input chamber. In addition, an input hole having an inner end opened to a large-diameter sliding hole, a first release hole having an outer end communicated with the release chamber and an inner end opened to a large-diameter sliding hole, and a large-diameter sliding hole A second release hole having an axis intersecting the axis and having an inner end opened to a large-diameter slide hole on the side opposite to the first release hole with respect to the input hole, and an axis intersecting the axis of the large-diameter slide hole. An output hole having an inner end opened to a large-diameter sliding hole between the input hole and the second opening hole, and an end portion at an intermediate portion of the first opening hole having an axis extending along the large-diameter sliding hole. Has an opening communicating with the second opening and an axis extending along the large-diameter sliding hole. An output communication hole the other end is communicated with an intermediate portion of the output holes relates to a liquid pressure control valve provided with in communication with the.

[0002]

2. Description of the Related Art Conventionally, such a hydraulic control valve is constructed, for example, as shown in FIG. 3, and has a large-diameter sliding hole 18 at its inner end.
The output hole 28 'to be opened in the second opening is formed in the direction intersecting the axis of the large-diameter sliding hole 18, but in the conventional case, the outer end of the second release hole 27' and the output hole 28 'is formed. The valve housing 3 ′ is fitted and fixed in the fitting hole 5 of the support body 4 with the part opened.

[0003]

However, in the above-mentioned conventional structure, an annular seal member 41 that seals between the output chamber 12 and the release chamber 13 and an annular seal member 42 that seals between the release chamber 13 and the input chamber 14 are provided. An annular seal member 43 for sealing between the outer end openings of the input chamber 14 and the output hole 28 ', and a seal between the outer end opening of the output hole 28' and the outer end opening of the second release hole 27 '. It is necessary to interpose the ring-shaped seal member 44 between the valve housing 3 ′ and the support body 4, and the number of ring-shaped seal members becomes relatively large. Further, in order to prevent the axial length of the hydraulic pressure control valve from becoming large due to the large number of sealing points, FIG.
As shown by, the axis of the output hole 28 'and the second release hole 27' must be set in a direction inclined from the direction orthogonal to the axis of the valve housing 3 ', which makes the boring process complicated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a hydraulic control valve in which the number of annular seal members is minimized and the axial length is shortened. To do.

[0005]

In order to achieve the above object, the invention according to claim 1 is a support body having a fitting hole whose one end is closed, and an inner surface of the fitting hole has one end side in the axial direction thereof. An output passage, a release passage, and an input passage, which are opened at positions spaced apart from each other, are provided, and an output chamber communicating with the output passage is formed between the output chamber and the one-end closed portion of the fitting hole, and a release chamber communicating with the release passage and An input chamber communicating with the input passage is formed between the control chamber and the inner surface of the fitting hole, and the valve housing fitted in the fitting hole has a control pressure chamber communicating with the output chamber and one end facing the control pressure chamber. A small-diameter slide hole into which the reaction force pin is slidably fitted, a liquid chamber facing the other end of the reaction force pin, and one end coaxially abutting against the other end of the reaction force pin in the liquid chamber. A large-diameter sliding hole for slidably fitting the spool valve body is provided coaxially, and An input hole for the inner end was opened to atmospheric diameter slide Doana with communicating the outer end to the force chamber, first was opened inner end to the large diameter slide Doana with communicating the outer end to the release chamber 1
A release hole and a second release hole having an axis line intersecting the axis line of the large-diameter slide hole and having an inner end opened to the large-diameter slide hole on the side opposite to the first release hole with respect to the input hole; The input hole and the second hole have an axis that intersects with the axis of the sliding hole.
An output hole having an inner end opened to a large-diameter slide hole between the release holes, and an end line communicating with an intermediate part of the first release hole having an axis line along the large-diameter slide hole and the second release. An open communication hole intersecting with the hole, and an output communication hole having an axis extending along the large-diameter sliding hole and having one end communicated with the output chamber and the control pressure chamber and the other end communicated with the intermediate portion of the output hole. In the hydraulic control valve provided with, an annular first sealing member is provided between the valve housing and the support between the output chamber and the release chamber, and an annular first seal member is provided between the valve housing and the support between the release chamber and the input chamber. Second
A seal member is provided, an annular third seal member is provided between the valve housing and the support between the outer ends of the output hole and the second release hole, and the output hole is located at a position outside the communicating portion with the output communicating hole. Is liquid-tightly closed by the plug member.

According to the invention of claim 2, in addition to the structure of the invention of claim 1, a small diameter portion is coaxially provided at one end of the valve housing via a step portion facing the one end. A cap-shaped filter that is provided and that forms a seal mounting groove for mounting the first seal member and that prevents the reaction force pin from separating from the valve housing is mounted on the small diameter portion.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

First, in FIG. 1, this hydraulic pressure control device is
The hydraulic pressure control valve 1 is assembled with a linear solenoid 2 and is used, for example, for brake hydraulic pressure control of a vehicle brake device.

The valve housing 3 of the hydraulic pressure control valve 1 is fitted in a fitting hole 5 provided in the support body 4 so as to prevent the valve housing 3 from being separated from the fitting hole 5. Thus, the fitting hole 5 is formed in a stepped shape such that one end side thereof is closed and has a diameter gradually decreasing toward the one end side, and the other end portion of the fitting hole 5 is formed. The linear solenoid 2 is attached to the support 4 so as to close. That is, the linear solenoid 2 is fitted in the other end opening of the fitting hole 5, and the retaining ring that engages with the locking groove 2a provided on the outer surface of the linear solenoid 2 on the inner surface of the other end opening of the fitting hole 5. 6 is fitted. Thus, the valve housing 3 is fitted into the fitting hole 5 so that the movement between the linear solenoid 2 and the one end closed portion of the fitting hole 5 is restricted.

The support member 4 has an output passage 7 opening to the inner surface of one end of the fitting hole 5, a release passage 8 opening to the inner surface of the middle portion of the fitting hole 5, and an inner surface of the middle portion of the fitting hole 5. The input passage 9 that opens is provided in order from one end of the fitting hole 5 to the other end thereof with a gap in the axial direction. Thus, the output passage 7 is connected to a hydraulic device such as a wheel brake, the release passage 8 is connected to a reservoir, and the input passage 9 is connected to a hydraulic pressure source.

The valve housing 3 is a cylindrical guide member 1.
0, and a bottomed cylindrical partition wall member 11 that is liquid-tightly fitted to one end side of the guide member 10. The partition wall member 11 is radially outward at the opening at one end thereof. The flange portion 11a, which is bulged and integrally provided, is liquid-tightly fitted to the one end side of the guide member 10 so that the one end surface of the guide member 10 is engaged. By fitting the valve housing 3 into the fitting hole 5, an output chamber 12 communicating with the output passage 7 and an annular release chamber 13 communicating with the release passage 8 are provided between the support 4 and the valve housing 3. An annular input chamber 14 communicating with the input passage 9 is defined.

On the other hand, in the valve housing 3, the control pressure chamber 15, the small-diameter sliding hole 16 and the liquid chamber 17 are arranged in this order from one end side.
And the large-diameter sliding hole 18 are provided coaxially. Control pressure chamber 1
5 is formed in the partition member 11, and the small-diameter sliding hole 16 is provided at the closed end of the partition member 11. One end of the small-diameter sliding hole 16 faces the control pressure chamber 15 and a reaction force pin 19
Are slidably fitted. The liquid chamber 17 is defined between the guide member 10 and the partition member 11, and the other end of the reaction force pin 19 is projected into the liquid chamber 17. Further, the large-diameter sliding hole 18 is formed in the guide member 10 so as to have a diameter smaller than the inner diameter of the liquid chamber 17 but larger than the small-diameter sliding hole 16. A spool valve body 20 having one end abutting against the other end of the reaction force pin 19 in the liquid chamber 17 is slidably fitted therein, and the other end of the spool valve body 20 is provided with a plunger of the linear solenoid 2. 21 is coaxially abutted. Moreover, the spool valve body 20 is provided between the partition member 11 and the spool valve body 20 in the liquid chamber 18 and the plunger 2
There is provided a return spring 22 that exerts a comparatively weak spring force so that the return spring 22 is always in contact with 1.

A first annular recess 23 is provided on the inner surface of the large-diameter sliding hole 18 at a position substantially corresponding to the input chamber 14, and a space is provided from the first annular recess 23 on the side opposite to the release chamber 13. The second annular recess 24 is provided at the open position.

Further, the guide member 1 in the valve housing 3
0, an input hole 25 having an outer end communicating with the input chamber 14 and an inner end opened to the large-diameter sliding hole 18, and an opening chamber 13
To the large-diameter sliding hole 18, and the inner end is opened to the large-diameter sliding hole 18, and the input hole 25 is provided with the large-diameter sliding hole 18 on the side opposite to the first releasing hole 26. A second release hole 27 opened to the outside, and an output hole 28 having an inner end opened to the large-diameter sliding hole 18 between the input hole 25 and the second release hole 27.
Are provided with an axis line orthogonal to the axis line of the large-diameter sliding hole 18, one end of the first release hole 26 communicates with the middle part of the first release hole 26, and the guide member 10 intersects with the second release hole 27. Of the guide member 10, one end of which is opened to one end of the guide member 10 to communicate with the output chamber 12 and the control pressure chamber 15, and the other end of which is communicated with an intermediate portion of the output hole 28. The output communication hole 30 is a large-diameter sliding hole 1
8 is provided with an axis line.

In FIG. 2, the output hole 28 has a small-diameter hole portion 28a having an inner end opened to the large-diameter sliding hole 18 and a large-diameter hole portion 28b having an outer end opened to the outer surface of the guide member 10. The output communication hole 30 is communicated with the small diameter hole portion 28a by being coaxially connected via the portion 28c. Moreover, a disc-shaped plug member 31 made of synthetic resin is fitted into the large-diameter hole portion 28b until it abuts the step portion 28c. The outer position is liquid-tightly closed than the communication part of the.

An annular groove 32 is provided on the outer periphery of the spool valve body 20. The annular groove 32 forms a second annular shape through the output hole 28 when the spool valve body 20 is in the retracted limit as shown in FIG. It communicates with the recess 24, that is, the second opening hole 27, but blocks the first annular recess 23, that is, the input hole 25, and when the spool valve body 20 advances from the backward limit, the output hole 2
8 is communicated with the first annular recess 23, that is, the input hole 25, but is formed so as to be blocked from the second annular recess 24, that is, the second release hole 27.

By the way, a small diameter portion 10b is coaxially provided at one end of the guide member 10 in the valve housing 3 via a step portion 10a facing the one end side.
An annular locking projection 10c is provided at the tip of 0b. A cap-shaped filter 33 that elastically engages the locking projection 10c and covers one end of the valve housing 3 is attached to the small-diameter portion 10b, and the partition member 11 from the guide member 10 is attached.
The separation of the reaction force pin 19 from the partition wall member 11 is prevented by the filter 33.

Moreover, the filter 33 has a seal mounting groove 34 formed between the filter 33 and the step portion 10a, and an annular first seal member 35 for sealing between the output chamber 12 and the release chamber 13 is provided in the seal mounting groove 34. Be attached to. An annular second seal member 36 that seals between the release chamber 13 and the input chamber 14 is attached to the outer periphery of the guide member 10 in the valve housing 3, and seals between the outer ends of the output hole 28 and the second release hole 27. The third seal member 37 is attached to the outer periphery of the guide member 10 in the valve housing 3.

The operation of this embodiment will now be described. The linear solenoid 2 applies an axial thrust force to the plunger 21 according to the amount of input electricity, and the plunger 21 is brought into coaxial contact with the spool valve body 20. As a result, the spool valve body 20 is pressed by the axial thrust from the linear solenoid 2 in the direction in which the output hole 28 communicates with the input hole 25. On the other hand, a spring force against the axial thrust is applied to the spool valve body 20 by a return spring 22, and the hydraulic pressure of the control pressure chamber 15, that is, the output hole 28 acts on the reaction force pin 19 to cause a reaction force. The reaction force from the pin 19 is applied against the axial thrust force. In this way, the spool valve body 20
The position where the output hole 28 communicates with the second release hole 27 and the output hole 2 so that the thrust of the linear solenoid 2 and the spring force of the return spring 22 and the reaction force from the reaction force pin 19 are balanced.
8 is connected to the input hole 25 and the large-diameter sliding hole 1
8, the hydraulic pressure corresponding to the amount of electricity input to the linear solenoid 2 is output from the output hole 28, that is, the output passage 7.

In such a hydraulic control valve 1, the valve housing 3 has an axis which intersects the axis of the large-diameter sliding hole 18.
Since the outer end of the output hole 28 formed in the guide member 10 is closed by the plug member 31, the input chamber 14 and the output hole 2 are
It is not necessary to seal between the outer end portion of the output chamber 8 and the outer end portion of the output chamber 8 by the ring-shaped seal member, and therefore the first seal member 35 prevents
2 and the release chamber 13 are sealed, and the second seal member 36
Seals between the release chamber 13 and the input chamber 14 by the third
The sealing member 37 allows the output hole 28 and the second release hole 27.
Since it suffices to seal between the outer ends of the ring-shaped seal members, the number of ring-shaped seal members can be reduced as compared with the prior art of FIG. That is, it is possible to reduce the axial length of the valve housing 3 and contribute to downsizing of the hydraulic control valve 1.

Moreover, since the hydraulic pressure in the input chamber 17 presses the plug member 31 at the outer end of the output hole 28 inward in the axial direction, the plug member 31 is brought into close contact with the step portion 28c over the entire circumference thereof. Even if the plug member 31 is loosely fitted in the large diameter hole portion 28a, the outer end portion of the output hole 28 can be liquid-tightly closed.
The work of assembling the plug member 31 becomes easy.

Further, the guide member 1 in the valve housing 3
A small-diameter portion 10b is coaxially provided at one end portion of 0 through a step portion 10a, a seal mounting groove 34 for mounting the first seal member 35 is formed between the step portion 10a, and the partition member 1
Since the filter 33 that prevents the 1 and the reaction force pin 19 from being separated from the guide member 10 is attached to the small diameter portion 10b,
It is possible to prevent dust and the like from entering the valve housing 3 side from the output hole 7 side to ensure a smooth operation of the spool valve body 20, and to omit a component dedicated to preventing the reaction force pin 19 from coming off. It is possible to contribute to the reduction of the number of parts, and it is not necessary to form the groove for mounting the first seal member 35 in the guide member 10, which also contributes to the reduction of the processing man-hour. be able to.

Although the embodiments of the present invention have been described 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.

For example, the partition member 11 may be fixed to the guide member 10.

[0025]

As described above, according to the first aspect of the invention, the annular first seal member is provided between the valve housing and the support between the output chamber and the release chamber, and between the release chamber and the input chamber. An annular second seal member is provided between the valve housing and the support body, an annular third seal member is provided between the valve housing and the support body between the outer ends of the output hole and the second release hole, and the output communication hole is provided. Since the output hole is liquid-tightly closed by the plug member at a position outer than the communication part of, the number of annular seal members can be reduced by eliminating the need for sealing between the input chamber and the outer end of the output hole. In addition, the axial length of the valve housing can be shortened to contribute to downsizing.

According to the invention of claim 2, in addition to the structure of the invention of claim 1, a small diameter portion is coaxially provided at one end of the valve housing via a step portion facing the one end. A cap-shaped filter that is provided and that forms a seal mounting groove for mounting the first seal member and that prevents the reaction force pin from being separated from the valve housing is mounted on the small diameter portion. It is possible to prevent dust and the like from entering from the output hole side to ensure smooth operation of the spool valve element, and to omit the dedicated component for preventing the reaction force pin from coming off, which contributes to a reduction in the number of components. It is possible to contribute to the reduction of processing man-hours by making it unnecessary to provide a groove for the seal member.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a hydraulic control valve.

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

FIG. 3 is a vertical sectional view of a conventional hydraulic control valve.

[Explanation of symbols]

 1 ... Liquid pressure control valve 3 ... Valve housing 4 ... Support 5 ... Fitting hole 7 ... Output passage 8 ... Release passage 9 ... Input passage 10a ... Stage Part 10b ... Small diameter part 12 ... Output chamber 13 ... Release chamber 14 ... Input chamber 15 ... Control pressure chamber 16 ... Small diameter sliding hole 17 ... Liquid chamber 18 ... Large-diameter sliding hole 19 ... Reaction force pin 20 ... Spool valve body 25 ... Input hole 26 ... First release hole 27 ... Second release hole 28 ... Output hole 29 ... -Open communication hole 30 ... Output communication hole 31 ... Plug member 33 ... Filter 34 ... Seal mounting groove 35 ... First seal member 36 ... Second seal member 37 ... 3 seal members

Claims (2)

[Claims] 1. An output which opens in a support body (4) having a fitting hole (5) whose one end is closed at the inner surface of the fitting hole (5) at positions sequentially spaced from one end side in the axial direction thereof. A passage (7), a release passage (8) and an input passage (9) are provided, and an output chamber (12) communicating with the output passage (7) is formed between the fitting hole (5) and one end closed portion. Release chamber (13) and input passage (9) leading to release passage (8)
An input chamber (14) leading to the output chamber (12) is formed in the valve housing (3) fitted in the fitting hole (5) by forming an input chamber (14) between the input chamber (14) and the inner surface of the fitting hole (5). Control pressure chamber (1
5) and a small-diameter sliding hole (16) into which a reaction force pin (19) whose one end faces the control pressure chamber (15) is slidably fitted.
And the liquid chamber (17) facing the other end of the reaction force pin (19)
And a large-diameter sliding hole (18) for slidably fitting a spool valve body (20) whose one end coaxially abuts against the other end of the reaction force pin (19) in the liquid chamber (17). Is provided coaxially, and has an outer end communicating with the input chamber (14) and an inner end opened to the large-diameter sliding hole (18).
And a first release hole (26) having an outer end communicated with the release chamber (13) and an inner end opened to the large-diameter sliding hole (18).
And has an axis intersecting with the axis of the large-diameter sliding hole (18), and the inner end is opened to the large-diameter sliding hole (18) on the side opposite to the first release hole (26) with respect to the input hole (25). Let second
It has an opening hole (27) and an axis line that intersects the axis line of the large-diameter sliding hole (18), and the input hole (27) and the second hole.
The output hole (28) having the inner end opened to the large-diameter sliding hole (18) between the release holes (26) and the first release hole (26) having an axis line along the large-diameter sliding hole (18). ) Has an open communication hole (29) which communicates with the second release hole (27) and an axial line extending along the large-diameter sliding hole (18), and has one end connected to the output chamber ( 12) and a control pressure chamber (15) and an output communication hole (30) whose other end communicates with an intermediate portion of the output hole (28), the hydraulic pressure control valve is provided with an output chamber (12). ) And the release chamber (13) between the valve housing (3) and the support (4), and an annular first sealing member (35) is provided between the release chamber (13) and the input chamber (14). An annular second seal member (36) is provided between (3) and the support (4), and the output hole (28) and the second solution are provided. An annular third seal member (37) is provided between the valve housing (3) and the support body (4) between the outer ends of the holes (27), and is located outside the communication part with the output communication hole (30). The hydraulic control valve is characterized in that the output hole (28) is liquid-tightly closed by the plug member (31). 2. A small diameter portion (10b) at one end portion of the valve housing (3) via a step portion (10a) facing the one end side.
Are provided coaxially, a seal mounting groove (34) for mounting the first seal member (35) is formed between the step mounting portion (10a) and the valve housing (3) of the reaction force pin (19).
The hydraulic control valve according to claim 1, wherein a cap-shaped filter (33) for preventing separation from the valve is attached to the small diameter portion (10b).