JPH0239098Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flow path flow rate switching solenoid valve that switches the direction and flow rate of fluid flow. The present invention relates to a flow path flow rate switching solenoid valve that is suitable for a solenoid valve that switches the flow direction and flow rate of fluid constituting an anti-skid device that locks and prevents a skid state that causes slippage between wheels and a road surface.

[Prior Art] First, an anti-skid device using a known electromagnetic valve for switching the direction and flow rate of fluid flow will be described.

FIG. 4 is an explanatory diagram showing the overall configuration of a conventional anti-skid device.

Normally, the brake oil pressure adjusting piston 7 of the brake oil pressure control device 10 is in the position shown. That is, oil 23 in the oil tank 21 is guided to the brake hydraulic chamber 6 of the brake hydraulic control device 10 via the solenoid valve MG1 by a dedicated pump 22 driven by the engine. Therefore, the brake hydraulic pressure adjusting piston 7 is pressed rightward by the brake hydraulic chamber 6. The valve seat part 1a and the valve element 1b which constitute the first cut valve 1, and the valve seat part 2a and the valve element 2b which constitute the second cut valve 2, are connected to the valve piston 4.
is in contact with the right end of the brake oil pressure adjusting piston 7 due to the action of the compression spring 5, and the first cut valve 1 and the second cut valve 2 are in an open state. Under this condition, when the brake pedal 11 is depressed, the master cylinder 12 increases the pressure in the conduit 14, and the pressure is transmitted to the front wheel cylinder 16, thereby stopping the rotation of the front wheel 17. On the other hand, the pressure in the master cylinder 12 is transferred to the rear wheel cylinder 18 via a pipe line 13, the first cut valve 1 and the second cut valve 2 of the brake hydraulic control device 10, and the pipe line 15.
The rotation of the rear wheel 19 is stopped.

When the microcomputer 20 determines the skid state of the rear wheel 19 based on the output of the rotation sensor, the microcomputer 20 switches the solenoid valves MG1 and MG2. The solenoid valve MG1 is closed, the solenoid valve MG2 is opened, and the hydraulic pressure in the brake hydraulic chamber 6 of the brake hydraulic control device 10 is controlled by the solenoid valve.
It is discharged to the oil tank 21 side via MG2.

Note that when the brake oil pressure adjusting piston 7 starts moving leftward, the first cut valve 1 closes first, so the oil pressure in the rear wheel cylinder 18 decreases. And the brake oil pressure adjustment piston 7
When the first cut valve 1 closes due to the leftward movement of the valve, the hydraulic pressure on the rear wheel cylinder 18 side is gradually increased by the small hole 3 of the valve piston 4.
The rear wheels 19 start rotating, and the skid state of the rear wheels 19 is eliminated. Thereafter, the solenoid valve MG1 is opened again, the solenoid valve MG2 is closed, and the brake oil pressure adjusting piston 7 is moved to the right. At this time, since the first cut valve 1 is closed, the hydraulic pressure of the rear wheel cylinder 18 is increased by the brake hydraulic pressure adjusting piston 7, and the rear wheel 19 is brought into a braking state.

Or, after the rotation sensor detects the skid state of the rear wheel 19, the skid state continues and the solenoid valve
If MG1 is closed and the solenoid valve MG2 is open for a long time, after the first cut valve 1 is closed, the valve piston 4 further moves and closes the second cut valve 2. In this case, the rear wheel cylinder 18 of the rear wheel 19 continues in the brake-released state. Then, when the skid state is resolved, the microcomputer 20 opens the solenoid valve MG1 and closes the solenoid valve MG2, so the volume of the brake hydraulic chamber 6 is expanded, and the hydraulic pressure of the rear wheel cylinder 18 is increased again, causing the rear wheel 19 can be put into a brake state.

In this way, the hydraulic pressure in the brake hydraulic chamber 6 of the brake hydraulic control device 10 is determined by the microcomputer 20, and the skid state of the rear wheel 19 is determined by the microcomputer 20, and the solenoid valve MGG1 and the solenoid valve MG2 are opened and closed according to the determined state. This prevents the wheels 19 from skidding, and similarly it can also prevent the front wheels 17 from skidding.

In the above explanation, the control output of the microcomputer 20 is that the solenoid valves MG1 and MG2 are alternately and simultaneously opened and closed, but the first cut valve 1 and the second cut valve 2 are switched to a single cut valve. If a valve is used and the pores 3 are eliminated, the pressure within the rear wheel cylinder 18 will rise and fall rapidly due to the absence of the pores 3, giving the driver a pedal shock. Or,
It is also expected that vibrations will occur in the vehicle system.

Solenoid valve to relieve that pedal shock
There is a control method in which MG1 and solenoid valve MG2 are temporarily closed at the same time. In this type of control method, when increasing or decreasing the hydraulic pressure in the brake hydraulic chamber 6 of the brake hydraulic control device 10, or when switching from increasing pressure to decreasing pressure or from decreasing pressure to increasing pressure, In this case, since the brake oil pressure remains unchanged, that is, the oil pressure in the brake oil pressure chamber 6 of the brake oil pressure control device 10 remains constant, it is possible to change the brake oil pressure from an increase to a decrease, or from a decrease to an increase, as in the former case. Although there is no sudden change like switching, the pressure is suddenly increased or decreased, so the pedal shock applied to the driver can be somewhat suppressed.

Furthermore, in order to suppress the shock given to the driver, a method shown in FIG. 5, which is a block diagram of a means for obtaining brake oil pressure in a conventional anti-skid device, is employed. In the drawings, the same reference numerals and symbols as in FIG. 4 indicate the same or corresponding parts as those in FIG. 4. The solenoid valve MG3 is a 3-port, 2-position switching valve, and the solenoid valve MG4 is a 2-port, 2-position, two-stage flow rate regulating valve.

In the means of obtaining this type of brake hydraulic pressure,
When the hydraulic pressure in the brake hydraulic chamber 6 of the brake hydraulic control device 10 is rapidly increased, the hydraulic pressure of the pump 22 is increased via the larger diameter side of the solenoid valve MG3 and the solenoid valve MG4. To rapidly reduce the pressure in the brake hydraulic chamber 6, excite the solenoid valve MG3 side and switch it to the discharge side.
The oil pressure inside can be discharged to the oil tank 21 side via the larger diameter side of the solenoid valve MG4. Furthermore, when the solenoid valve MG4 is switched to the smaller diameter side, the hydraulic pressure in the brake hydraulic chamber 6 can be gradually increased or decreased depending on the switching state of the solenoid valve MG3.

Therefore, the brake hydraulic control device 10 suddenly
When increasing or decreasing the hydraulic pressure in the brake hydraulic chamber 6, this can be done by switching the solenoid valve MG3 using the larger diameter side of the solenoid valve MG4. When switching from pressure increase to pressure reduction or from pressure reduction to pressure increase, be sure to use solenoid valve MG.
By switching through the smaller diameter side of No. 4, it is possible to gradually switch from increased pressure to reduced pressure or from reduced pressure to increased pressure. In the method using this type of means for obtaining brake oil pressure, the brake oil pressure chamber 6
The change in oil pressure becomes smoother, and vibrations in the vehicle system and pedal shock when the brake pedal 11 is depressed can be reduced. Furthermore, no vibration is generated in the vehicle system. Therefore, this type of method is considered preferable for antiskid devices.

[Problems to be solved by the invention] However, as this type of solenoid valve MG3, a 3-port, 2-position switching valve is used, and as the solenoid valve MG4, a 2-port, 2-position two-stage flow rate regulating valve is used, and each independently It is necessary to adjust the flow direction and flow rate in two stages by switching the port 2 position and switching the 2 port 2 position. In order to assemble this type of solenoid valve MG3 and solenoid valve MG4 compactly, it was necessary to assemble them as described in, for example, Japanese Patent Laid-Open No. 1926575/1983.

That is, the solenoid valves MG3 and MG4 correspond to four types of control: rapid pressure increase and decrease, and gradual pressure increase and decrease.
Since they do not perform independent control like MG1 and solenoid valve MG2, solenoid valve MG3 and solenoid valve MG
4 in parallel in an attempt to assemble them compactly, the piping between them became complicated, causing problems in the assembly process and the number of parts.

As a means to solve this type of problem, two solenoids and a movable iron core fitted in a sleeve disposed inside the two solenoids,
A flow path switching chamber and a flow rate adjustment chamber formed by a yoke, a core, and a sleeve, a fluid flow path that connects the flow path switching chamber and the flow rate adjustment chamber, and a valve disposed in each of the yoke and the core. a flow path switching solenoid valve having a seat and opening and closing between the flow path switching chamber and both valve seats by a valve disposed on a movable iron core inserted into the flow path switching chamber; An orifice drilled in a valve seat installed in the core on the opposite side of the fluid flow path connecting the switching chamber and the flow rate adjustment chamber, and a valve installed in the movable iron core inserted into the flow rate adjustment chamber. Therefore, a flow rate adjustment solenoid valve that switches between the flow path switching chamber and the orifice, and a fluid flow path that connects to the valve seat side of the flow rate adjustment solenoid valve side of the flow path switching solenoid valve are provided on one of the solenoid valve sides. Therefore, a flow path flow rate switching solenoid valve is conceivable, which is characterized in that these are integrated.

However, in the above solution, by disposing a filter on the brake hydraulic pressure supply side, it is possible to remove foreign matter flowing into the flow path flow rate switching solenoid valve, but the movable part of the flow path flow rate switching solenoid valve It is predicted that foreign matter such as metal powder generated by cutting and abrasion of metal due to sliding etc. will clog the orifice on the flow regulating solenoid valve side, causing clogging.

Furthermore, in current anti-skid devices and the like, the diameter of the orifice tends to be reduced due to the increase in power pressure, etc., and the problem of clogging has become impossible to ignore.

Therefore, the present invention solves the above problems by compactly integrating a flow path switching solenoid valve and a flow rate adjustment solenoid valve, and also provides a flow path flow rate switching solenoid valve that does not cause clogging of the flow rate adjustment solenoid valve. It is intended for the purpose of providing.

[Means for Solving the Problems] The flow path flow rate switching solenoid valve according to the present invention includes two solenoids and a movable iron core fitted in a sleeve disposed inside the two solenoids. ,
A flow path switching chamber and a flow rate adjustment chamber formed by a yoke, a core, and a sleeve, a fluid flow path that connects the flow path switching chamber and the flow rate adjustment chamber, and a valve disposed in each of the yoke and the core. a flow path switching solenoid valve having a seat and opening and closing between the flow path switching chamber and both valve seats by a valve disposed on a movable iron core inserted into the flow path switching chamber; A valve seat disposed on a core on the opposite side of a fluid flow path connecting the switching chamber and the flow rate adjustment chamber, and a valve element disposed on a movable iron core inserted in the flow rate adjustment chamber and facing the valve seat. According to the present invention, there is provided a flow rate adjusting solenoid valve in which a leakage fluid passage portion formed when the valve element is closed and a main fluid passage portion formed when the valve element is opened are integrally bored in the valve seat. , a fluid flow path connected to the valve seat side of the flow rate adjustment solenoid valve side of the flow path switching solenoid valve is provided on one of the solenoid valve sides, and these are integrally constructed.

[Function] When the solenoid 53 of the flow path switching solenoid valve 100 and the solenoid 73 of the flow rate adjustment solenoid valve 200 are de-energized, the hydraulic pressure on the supply side A is rapidly transferred to the brake hydraulic chamber 6.
The hydraulic pressure in the brake hydraulic chamber 6 can be rapidly increased. Flow path switching solenoid valve 10
When only the zero solenoid 53 is energized, the hydraulic pressure in the brake hydraulic chamber 6 is discharged to the discharge side C and rapidly reduced in pressure. Furthermore, when the solenoid 73 of the flow rate adjustment solenoid valve 200 is energized, the main fluid path section 8 of the valve seat 83
The small ball 81, which acts on the valve 3a, closes and gradually increases the hydraulic pressure in the brake hydraulic chamber 6 while the flow rate is regulated in the leakage fluid path section 83b. Then, when the solenoid 53 of the flow path switching solenoid valve 100 and the solenoid 73 of the flow rate adjustment solenoid valve 200 are simultaneously excited, the oil pressure on the supply side A is closed by the supply valve 51. Since the discharge valve 50 on the discharge side C is opened, the hydraulic pressure in the brake hydraulic chamber 6 of the brake hydraulic pressure control device 10 is gradually discharged to the discharge side C while the flow rate is regulated by the leakage fluid path portion 83b.

[Example] Fig. 1 is a cross-sectional view showing an embodiment of the flow path flow rate switching solenoid valve of the present invention, Fig. 2 is a perspective view of the valve seat used in the embodiment of Fig. 1, and Fig. 3 shows leakage fluid. It is an explanatory view when a foreign object enters a road part.

In the figure, A is the supply side that receives the hydraulic pressure supplied from the pump 22 side of FIG. 3. Similarly, B is the brake hydraulic chamber side that controls increasing or decreasing the hydraulic pressure in the brake hydraulic chamber 6 of the brake hydraulic control device 10. Similarly, C is a discharge side that reduces the hydraulic pressure in the brake hydraulic chamber 6 and discharges the hydraulic pressure to the oil tank 21.

The flow path switching solenoid valve 100 is composed of a 3-port, 2-position switching solenoid valve, and is specifically constructed as follows.

The coil 31 is wound around a bobbin 32 to constitute a solenoid 53. A sleeve 34 made of a non-magnetic material is mounted inside the bobbin 32, one end of the bobbin 32 and the sleeve 34 is fixed with a yoke 35, and the other end of the bobbin 32 and the sleeve 34 is fixed with a core 36. There is. A housing 37 made of a material with low magnetic resistance is sandwiched between the yoke 35 and the core 36 in order to form a magnetic path with low magnetic resistance.

Movable iron core 38 inserted into the sleeve 34
has a substantially triangular prism shape with three rounded corners. The movable iron core 38 is provided with a concave notch 38a on the core 36 side, and a compression spring 39 is held in the concave notch 38a between the movable iron core 38 and the core 36. One end of the valve auxiliary member 30 is attached to the concave cutout 38a of the movable core 38, and a small ball 41 acting as a valve is brazed to the other end. Further, a small ball 42 functioning as a valve is brazed to the opposite side of the movable core 38 from where the concave cutout 38a is provided. A valve seat 43 is placed at a position of the core 36 facing the small ball 41.
The valve seat 43 has a fluid flow path 44 connected to a supply side A of a flow rate adjustment solenoid valve 200, which will be described later. Further, a valve seat 45 is provided at a position of the yoke 35 facing the small ball 42, and the valve seat 45 has a fluid flow path 46 guided to the pipe line side of the discharge side C. The small ball 41 and the valve seat 43 constitute a supply valve 51, and the small ball 42 and the valve seat 45 constitute a discharge valve 50. Note that an O-ring and a core 36 are connected between the yoke 35 and the sleeve 34.
and the sleeve 34 are sealed with an O-ring 48. The core 36 includes a flow path switching chamber 52 into which a movable core 38 is inserted, and a movable core 7 to be described later.
A fluid flow path 54 is formed between the flow rate adjustment chamber 90 and the flow rate adjustment chamber 90 into which the flow rate adjustment chamber 8 is inserted.

The flow rate adjustment solenoid valve 200 is a 2-port, 2-position flow rate adjustment solenoid valve, and is specifically configured as follows.

The coil 71 is wound around a bobbin 72 to constitute a solenoid 73. A sleeve 74 made of a non-magnetic material is disposed inside the bobbin 72, and one end of the sleeve 74 is connected to the flow path switching solenoid valve 1.
It is fixed to the core 36 of 00 by brazing etc., and the sleeve 7
The other end of 4 is fixed to the core 76 by brazing or the like.
Therefore, the inside and outside of the sleeve 74 are sealed, and the inside of the sleeve 74 is connected to the flow rate adjustment chamber 9.
0 is formed. A sealing member 82 made of a non-magnetic material is disposed between the inside of the bobbin 72 and the sleeve 74.
A gap is provided between the sealing member 82 and the O-ring 6 between one end of the sealing member 82 and the core 76.
It is sealed with 3. The other end of the seal member 82 is fixed to the yoke 75 by brazing or the like. The yoke 75 fixes one end of the bobbin 72. The yoke 75 and the flow path switching solenoid valve 1
00 cores 36 are sealed with an O-ring 61. A housing 77 made of a material with low magnetic resistance is sandwiched between the yoke 75 and the core 76 and forms a magnetic path with low magnetic resistance.

Movable iron core 78 inserted into the sleeve 74
Similar to the movable core 38 of the flow path switching solenoid valve 100, it has a substantially triangular prism shape with three rounded corners of a substantially triangular cross section. The movable core 78 is provided with a concave notch 78a on the core 76 side, and a compression spring 79 is held between the concave notch 78a of the movable core 78 and a valve seat 83 provided in the core 76. ing. One end of a valve auxiliary member 80 is attached to the concave notch 78a of the movable core 78, and a small ball 81 acting as a valve is brazed to the other end.

The valve seat 83 has a small ball 81 that acts as a valve.
A main fluid passage portion 83a with a large diameter that opens and closes with a main fluid passage portion 83a and a leakage fluid passage portion 83 formed by carving a groove around the main fluid passage portion 83a.
It has b. And the small ball 81 of the valve seat 83
A filter 86 is disposed on the opposite side where it comes into contact. Therefore, the main fluid passage 83 of the valve seat 83
The oil flow that has passed through the leakage fluid path portion 83b and the leakage fluid path portion 83b passes through the filter 86 and flows into the fluid flow path 85 leading to the brake hydraulic chamber 6.

The fluid flow path 44 of the flow path switching solenoid valve 100 is
The gap between the sleeve 74 and the sealing member 82 of the flow rate adjustment solenoid valve 200 is used as a fluid flow path, and is connected to the fluid flow path 84 between the supply side A and the supply side A.

The flow path switching solenoid valve 100 and the flow rate adjustment solenoid valve 2
00 is connected to the flow rate adjustment chamber 90 formed by the sleeve 74 by the fluid flow path 54, and is designed to prevent the movable core 78 moving within the flow rate adjustment chamber 90 from sealing the fluid flow path 54 on the core 36 side. , sleeve 7
A spacer 62 is disposed on the core 36 side of No. 4.

Note that, due to the movement of the movable iron core 78, the main fluid path portion 83a and the leakage fluid path portion 8 of the small ball 81 and the valve seat 83 are
3b constitutes a flow rate adjustment valve 91. Therefore,
When the movable iron core 78 opens the flow rate regulating valve 91, the main fluid passage section 83a and the leakage fluid passage section 83b regulate the flow rate of the fluid passage 85, and the flow rate regulating valve 91
When closed, the flow rate of the fluid flow path 85 is regulated by the leakage fluid path portion 83b.

For example, if a pipe line connecting to the brake hydraulic chamber 6 of the brake hydraulic control device 10 is formed in the brake hydraulic control device 10, the pipe line is sealed with an O-ring 64, an O-ring 65, and an O-ring 66. be stopped. In addition, the dual flow path switching solenoid valve 100
and the flow rate adjustment solenoid valve 200 are fixed together by a casing 95. The casing 95 includes the dual flow path switching solenoid valve 100 and the flow rate adjustment solenoid valve 20.
Adoption or rejection is selected depending on the surrounding configuration of 0.

The flow path flow rate switching solenoid valve of this embodiment configured as described above can operate as follows.

It is assumed that the supply side A is connected to the pump 22 side in FIG. 5, the brake hydraulic chamber side B is connected to the brake hydraulic chamber 6 of the brake hydraulic control device 10, and the discharge side C is connected to the oil tank 21.

First, the solenoid 53 of the flow path switching solenoid valve 100
When the solenoid 73 of the flow rate adjustment solenoid valve 200 is de-energized, the oil pressure on the supply side A flows through the fluid flow path 84 and flows through the fluid flow path formed by the gap between the sealing member 82 and the sleeve 74 and the fluid in the core 36. Channel 44
and reaches the supply valve 51. Since the supply valve 51 is in the open state due to the compression spring 39, the oil pressure in the flow path switching chamber 52 is increased, and the oil pressure in the flow path switching chamber 52 is transferred to the flow rate adjustment chamber 9 via the fluid flow path 54.
It leads to 0. Since the flow rate adjustment valve 91 is opened by the compression spring 79, the hydraulic pressure is transmitted from the flow rate adjustment chamber 90 to the main fluid path section 83a and the leakage fluid path section 8.
3b, and further includes a filter 86 and a fluid flow path 8.
5 and is led to the brake hydraulic chamber 6 of the brake hydraulic control device 10.

That is, the solenoid 53 of the flow path switching solenoid valve 100
When the solenoid 73 of the flow rate adjustment solenoid valve 200 is de-energized, the hydraulic pressure on the supply side A can be rapidly guided to the brake hydraulic chamber 6 side, and the hydraulic pressure in the brake hydraulic chamber 6 can be rapidly increased.

When the solenoid 53 of the flow path switching solenoid valve 100 is energized, the supply valve 51 is closed and the discharge valve 50 is opened. Therefore, the oil pressure on the supply side A reaches the filter 94 of the flow rate adjustment solenoid valve 200, the fluid passage 84, the passage formed by the gap between the seal member 82 and the sleeve 74, and the fluid passage 44, but the supply valve 51 Since it is closed, the hydraulic pressure does not reach the flow path switching chamber 52. By opening the discharge valve 50, until then,
The applied oil pressure in the brake oil pressure chamber 6 of the brake oil pressure control device 10 passes through a fluid flow path 85, a filter 86, and a flow rate adjustment valve 91, and then enters the flow rate adjustment chamber 9.
Further, the fluid passes through the fluid flow path 54 and the flow path switching chamber 52 and is discharged from the discharge valve 50 to the discharge side C. That is, when only the solenoid 53 of the flow path switching solenoid valve 100 is excited, the hydraulic pressure in the brake hydraulic chamber 6 is discharged to the discharge side C and rapidly reduced in pressure.

When only the solenoid 73 of the flow rate adjustment solenoid valve 200 is energized, the main fluid path portion 83a of the flow rate adjustment valve 91 is closed, and only the leakage fluid path portion 83b can pass through the valve seat 83.

Therefore, the oil pressure on the supply side A is controlled by the filter 94.
The liquid is guided to the flow path switching chamber 52 via the fluid flow path 84 , the liquid flow path formed by the gap between the seal member 82 and the sleeve 74 , the fluid flow path 44 , and the supply valve 51 . Then, from the flow path switching chamber 52 to the fluid flow path 5
4. The fluid is guided to the brake hydraulic chamber 6 of the brake hydraulic control device 10 via the flow rate adjustment chamber 90, the leakage fluid passage section 83b, the filter 86, and the fluid passage 85.

That is, the solenoid 73 of the flow rate adjustment solenoid valve 200
When excited, the hydraulic pressure in the brake hydraulic chamber 6 is gradually increased while the flow rate is regulated in the leakage fluid path portion 83b.

Then, the solenoid 5 of the flow path switching solenoid valve 100
3 and the solenoid 73 of the flow rate adjustment solenoid valve 200 are simultaneously energized, the oil pressure on the supply side A is closed by the supply valve 51. Since the discharge valve 50 on the discharge side C is opened, the hydraulic pressure in the brake hydraulic chamber 6 of the brake hydraulic pressure control device 10 is gradually discharged to the discharge side C while the flow rate is regulated by the leakage fluid path portion 83b.

At this time, in this embodiment, the filter 8
The fluid that has passed through the filter 86 will not flow back through the filter 86 again, and there will be no possibility of foreign matter such as metal powder getting mixed into the oil pressure supply source side. Furthermore, the hydraulic pressure that has passed through the filter 86 is not circulated by the hydraulic pressure received from the supply side, but between the flow path switching chamber 52 and the flow rate adjustment chamber 90.
The brake hydraulic pressure chamber 6 of the brake hydraulic control device 10 will not be clogged. Furthermore, the possibility that the main fluid path portion 83a and the leakage fluid path portion 83b of the flow rate regulating valve 91 will become clogged is extremely reduced.

At this time, as shown in the explanatory diagram of FIG. 3, if the leakage fluid passage 83b of the valve seat 83 is clogged with foreign matter, for example, the main fluid passage 83a is closed by the small ball 81 as shown in FIG. 3a. In the state of , brake hydraulic chamber side B
Leakage fluid path section 83 when flowing from to the discharge side C
Foreign matter is removed by the fluid flow rate flowing through b. Alternatively, when the main fluid path section 83a shown in FIG. 3b is opened, the main fluid path section 83a and the leakage fluid path section 8
The flow rate of the fluid flowing to 3b is increased, and foreign matter can be easily removed by the fluid flowing from the brake hydraulic chamber side B to the discharge side C.

In this way, the flow path flow rate switching solenoid valve of this embodiment can perform the same operation as the solenoid valves MG3 and MG4 shown in FIG.

That is, the above embodiment of the present invention is formed by two solenoids, a movable core fitted in a sleeve disposed inside the two solenoids, a yoke, a core, and a sleeve. two chambers; a fluid flow path connecting the two chambers;
A flow path switching solenoid having valve seats respectively disposed on the yoke and the core, and opening and closing between the one chamber and both valve seats by means of a valve disposed on the one movable iron core. A main fluid passage portion 83a and a leakage fluid passage portion 83b are bored in a valve seat provided in the core on the opposite side of the fluid passage connecting the valve and the two chambers.
, a flow rate adjustment solenoid valve that opens and closes the chamber, the main fluid path section 83a, and the leakage fluid path section 83b by a valve arranged on the other movable iron core, and a flow rate adjustment of the flow path switching solenoid valve. A fluid flow path connected to the valve seat side of the solenoid valve side is formed by the outer side of the sleeve on the flow rate adjusting solenoid valve side and a gap between seal members arranged on the outside of the sleeve, and the whole is integrated. .

However, the fluid flow path connected to the valve seat side of the flow rate adjustment solenoid valve of the flow path switching solenoid valve can be provided on the flow rate adjustment solenoid valve side or the flow rate adjustment solenoid valve.

For example, in the case where the flow rate adjusting solenoid valve is provided with a fluid flow path that connects to the valve seat side on the flow rate adjusting solenoid valve side of the flow path switching solenoid valve, as shown in FIG.
The brake hydraulic chamber side B of the brake hydraulic control device can be provided in the same direction as the brake hydraulic pressure control device. In addition, in the case where the flow path switching solenoid valve is provided with a fluid flow path that connects to the valve seat side on the flow rate adjustment solenoid valve side of the flow path switching solenoid valve, the brake hydraulic control device's brake A hydraulic chamber side B can be provided. Of course, it can also be provided between the flow path switching solenoid valve and the flow rate adjustment solenoid valve. Note that these selections are a matter of design.

In addition, a fluid flow path connecting to the valve seat side of the flow rate adjustment solenoid valve side of the flow path switching solenoid valve is formed by a gap between the outer side of the sleeve on the flow rate adjustment solenoid valve side and the seal member disposed on the outside of the sleeve. However, when implementing the present invention, the fluid flow path may be arranged by providing a conduit outside the solenoid. Or,
A conduit may be provided in the flow rate adjustment chamber.

In the embodiment of the present invention, the main fluid passage section 83a is bored in the valve seat provided in the core on the opposite side of the fluid passage connecting the flow passage switching chamber and the flow rate adjustment chamber, and the surrounding area thereof. Leakage fluid path section 8 formed by carving a groove
3b, these main fluid path portions 8
The size and shape of the leakage fluid path portion 3a and the leakage fluid path portion 83b can be set arbitrarily. For example, the main fluid path section 83 of the above embodiment shown in FIGS. 1 and 2
a and the leakage fluid path portion 83b carved around it,
Although a single groove is carved around the main fluid path section 83a, a plurality of concave grooves form a leakage fluid path section 83b.
may be formed. Alternatively, two ends in the longitudinal direction of the main fluid passage section 83a, which has an elliptical horizontal cross section, may be used as the leakage fluid passage section 83b. Also, the former is the valve seat 83
Regarding the countermeasure on the side, the same effect as the countermeasure on the valve seat 83 side can be obtained by carving a groove in the small ball of the valve or by making the small ball have an elliptical horizontal cross section. but,
Considering the condition where the groove is clogged with foreign matter, the valve seat 83
It is preferable to form a groove on the side of the valve seat 83 because if the side becomes clogged with foreign matter, it will be easily removed by the fluid flow. Note that the leakage fluid path portion 83b does not necessarily have to be formed by a groove, and can also be formed by a convex portion depending on the fluid flow rate.

Although the present invention has been described as an example in which the flow path flow rate switching solenoid valve is used in an anti-skid device, the present invention is not limited to the anti-skid device. However, especially when used in an anti-skid device, its miniaturization and small number of parts can reduce the causes of failures.

[Effects of the invention] As described above, the channel flow rate switching solenoid valve of the invention has the following advantages:
two solenoids, a movable iron core fitted in a sleeve disposed inside the two solenoids, two chambers formed by the yoke, the core and the sleeve, and the two solenoids. A flow path switching solenoid valve and a flow rate adjustment solenoid valve are constituted by a fluid flow path connecting the chambers and valve seats respectively disposed on the yoke and the core, and a movable iron core of the flow path switching solenoid valve. a flow path switching solenoid valve that opens and closes between the flow rate switching chamber and both valve seats by means of a valve arranged in the flow path switching chamber; and a fluid flow path that connects the flow path switching chamber and the flow rate adjustment chamber. A leakage fluid path formed by a valve seat disposed on the opposite core and a valve element disposed on a movable iron core inserted in the flow rate adjustment chamber and facing the valve seat when the valve element is closed. Since the valve seat and the main flow passage formed when the valve element is opened are integrally formed in the valve seat, the flow passage flow rate switching solenoid valve can be assembled compactly. Moreover, the piping between the flow path switching solenoid valve and the flow regulating solenoid valve becomes simple, the number of parts can be reduced, and the assembly work can be simplified.

Since the leakage fluid passage formed when the valve is closed and the main fluid passage formed when the valve is opened are integrally bored in the valve seat, the flow rate can be adjusted. No clogging occurs in the solenoid valve.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the flow path flow rate switching solenoid valve of the present invention, Fig. 2 is a perspective view of the valve seat used in the embodiment of Fig. 1, and Fig. 3 shows foreign matter in the leakage fluid path. FIG. 4 is an explanatory diagram showing the overall configuration of a conventional anti-skid device, and FIG. 5 is a configuration diagram of a means for obtaining brake oil pressure of the conventional anti-skid device. In the figure, 34, 74: sleeve, 35, 7
5: Yoke, 36, 76: Core, 38, 78: Movable iron core, 53, 73: Solenoid, 82: Seal member, 52: Flow path switching chamber, 90: Flow rate adjustment chamber, 4
1.42,81: Small ball (benko), 44,54,8
4, 85: fluid flow path, 43, 45, 83: valve seat,
100: flow path switching solenoid valve, 200: flow rate adjustment solenoid valve, 83a: main fluid path section, 83b: leakage fluid path section. In addition, the same reference numerals and symbols in the figures are
Indicates the same or equivalent part.

Claims (1)

[Claims for Utility Model Registration] (1) Two solenoids, a movable iron core fitted in a sleeve disposed inside the two solenoids, a yoke, a core, and a sleeve. a flow path switching chamber and a flow rate adjustment chamber; a fluid flow path connecting the flow path switching chamber and the flow rate adjustment chamber; and a valve seat disposed on the yoke and the core, respectively; a flow path switching solenoid valve that opens and closes between the flow path switching chamber and both valve seats by means of a valve disposed on a movable iron core inserted in the flow path switching chamber; The valve is closed by a valve seat disposed on the core on the opposite side of the fluid flow path connecting the flow rate adjustment chamber, and a valve element disposed on the movable iron core inserted in the flow rate adjustment chamber and facing the valve seat. A flow rate adjustment solenoid valve in which a leakage fluid path portion formed when the valve element is opened and a main fluid path portion formed when the valve element is opened are integrally bored in the valve seat; A flow path flow rate switching solenoid valve characterized in that a fluid flow path connected to a valve seat side of the solenoid valve side is provided on one of the solenoid valve sides, and these are integrally constructed. (2) Utility model registration claim 1, characterized in that a fluid flow path connected to the valve seat side of the flow rate adjustment solenoid valve side of the flow path switching solenoid valve is provided on the flow path switching solenoid valve side. The flow path flow rate switching solenoid valve described in . (3) Claim 1 of the utility model registration characterized in that a fluid flow path connected to the valve seat side of the flow rate adjustment solenoid valve side of the flow path switching solenoid valve is provided on the flow rate adjustment solenoid valve side. The described flow path flow rate switching solenoid valve. (4) The fluid flow path connecting to the valve seat side on the flow rate adjustment solenoid valve side of the flow path switching solenoid valve is connected to the valve seat side on the flow rate adjustment solenoid valve side by using a gap between seal members arranged on the outside of the sleeve on one of the solenoid valve sides and the outside of the sleeve. Claims 1 to 3 of the claims for utility model registration characterized by the fact that
The flow path flow rate switching solenoid valve according to any one of paragraphs.