JP2005047428A - Vehicular hydraulic pressure control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular hydraulic pressure control device of a simple configuration capable of preventing suppressing ingress of water in a solenoid valve storage chamber. <P>SOLUTION: A solenoid valve storage chamber 7 to store solenoids 10a and 11a of solenoid valves 10 and 11 protruded from a hydraulic unit side and a lower space 12 therebelow are provided on a solenoid valve cover 4, and an upper volume reducing unit 22 is provided above a solenoid valve arrangement area 7a. The upper volume reducing unit 22 is formed so that a bulkhead 4a of the solenoid valve cover 4 is expanded to the hydraulic unit side, and the volume of an upper space 23 held by the upper volume reducing unit 22 and a hydraulic unit housing (not shown) is reduced as much as possible. Therefore the space volume of the entire solenoid valve storage chamber 7 is reduced, and the water ingress in the solenoid valve storage chamber 7 is reduced to suppress the ingress water level thereby. Further, since the space volume of the solenoid valve storage chamber 7 is concentrated in the lower space 21, the water ingress level is suppressed within the lower space, and water coverage on electric connection units can be prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hydraulic control device for a vehicle.

  Conventionally, in a vehicle, for example, to perform anti-skid brake control, a hydraulic unit that adjusts a wheel cylinder pressure by operating an electromagnetic valve, a pump motor that is an actuator for adjusting hydraulic pressure, and a control of the hydraulic unit In addition, a hydraulic control device including an electronic control device for driving the pump motor is mounted. In order to reduce the size of the hydraulic pressure control device, the hydraulic pressure unit, the pump motor, and the electronic control device are integrated into a module.

  In such a hydraulic pressure control device, it is necessary to prevent the solenoid portion of the solenoid valve from being exposed to moisture and dust in order to prevent breakdown and corrosion. For this reason, it is conceivable to place the solenoid part in the airtight chamber. However, in an airtight room under an on-board environment where the temperature changes rapidly, this temperature change causes the entry of water vapor into the airtight room and condensation in the airtight room. It's easy to do.

  For this reason, the solenoid valve housing chamber that houses the solenoid portion of the solenoid valve is usually provided with a vent hole in one direction that makes it difficult for moisture to enter and facilitates draining the infiltrated moisture. (For example, refer to Patent Document 1).

The intrusion of water into the electromagnetic valve storage chamber provided with such a vent is, for example, the pressure in the electromagnetic valve storage chamber by applying water pressure from one direction to the vent as in the case where the electromagnetic valve storage chamber is submerged. In addition to the water level rising until equilibrium is reached, the solenoid valve storage chamber located in the engine room is relatively hot depending on the operating conditions of the solenoid valve. This is caused by suction of water from the vent due to a negative pressure state accompanying a temperature drop in the electromagnetic valve housing chamber when water is applied to the casing of the electromagnetic valve housing chamber due to, for example, springing up.
JP 2001-124005 A

  In the above prior art, in order to make it difficult for water to enter the electromagnetic valve accommodating chamber, the electromagnetic valve accommodating chamber and the outside are communicated with each other by a labyrinth-structured air passage formed by bending a housing or a pump case over a long distance. I am doing so. However, since the volume of the air passage from the vent to the solenoid valve accommodating chamber is small and the volume of the solenoid valve accommodating chamber itself is large, water that has entered from the vent may easily reach the solenoid valve accommodating chamber. .

  That is, even when the electromagnetic valve housing chamber is pressurized from the outside and water enters, or even when the electromagnetic valve housing chamber becomes negative pressure and water enters, the space of the entire electromagnetic valve housing chamber including the air passage Water with a ratio of a pressurized part or a negative part with respect to the volume enters the electromagnetic valve housing chamber. Therefore, the amount of such water intrusion is proportional to the space volume of all the solenoid valve accommodation chambers. As a result, when the space volume of the electromagnetic valve accommodating chamber is large as in the above-described prior art, the amount of water that enters is large, and the volume of the ventilation path from the vent that is the inlet to the electromagnetic valve accommodating chamber is small. The water level that has entered the electromagnetic valve storage chamber becomes even higher.

  In addition, if the space volume of the solenoid valve storage chamber is large, even if there is no water inflow due to the inflow of water, the amount of water vapor that enters along with the outside air increases due to the change in the space volume of the solenoid valve storage chamber. Become.

  As described above, since the space volume of the electromagnetic valve storage chamber is large, there is a problem that the electrical connection portion in the electromagnetic valve storage chamber is exposed to water and the possibility of impairing the reliability of the device is increased.

  An object of this invention is to suppress the permeation | transmission of the water | moisture content in a solenoid valve storage chamber by simple structure in view of the said point.

  In order to achieve the above object, the invention according to claim 1 is a liquid containing a hydraulic mechanism including a pump motor (3) for adjusting a hydraulic pressure for vehicle control and a plurality of electromagnetic valves (10, 11). A vehicle hydraulic control apparatus comprising: a pressure unit housing (2); and an electromagnetic valve cover (4) coupled to the hydraulic unit housing so as to cover an opening (2b) at one end of the hydraulic unit housing. The electromagnetic valve is accommodated in the electromagnetic valve arrangement region (7a) in the electromagnetic valve accommodating chamber (7) formed by the opening and the electromagnetic valve cover, and the electromagnetic valve accommodating chamber is disposed at the bottom of the electromagnetic valve accommodating chamber. A vent (19) communicating with the outside air is formed, a lower space (12) having a predetermined volume is formed between the solenoid valve placement region and the vent, and the side opposite to the lower space of the solenoid valve placement region The volume reduction part (22) is provided in the upper region of It is characterized in.

  In this invention, an electromagnetic valve housing chamber is formed to be surrounded by the electromagnetic valve cover and the hydraulic unit housing. A plurality of electromagnetic valves are accommodated in the electromagnetic valve arrangement region of the electromagnetic valve accommodation chamber. In the electromagnetic valve storage chamber, a lower space having a predetermined volume is formed below the electromagnetic valve, and a vent opening communicating the electromagnetic valve storage chamber and the outside at the lowermost portion of the electromagnetic valve storage chamber further below the lower space Is provided. Moreover, the volume reduction part which reduces space volume is provided in the upper area | region above the solenoid valve arrangement | positioning area | region of a solenoid valve storage chamber. Therefore, the space volume of the entire electromagnetic valve housing chamber can be reduced as compared with the case where the volume reducing portion is not provided.

  As a result, the absolute amount of water entering the electromagnetic valve accommodating chamber from the vent due to pressurization or negative pressure of the electromagnetic valve accommodating chamber via the vent decreases as the space volume in the electromagnetic valve accommodating chamber decreases. Therefore, the water level entering the lower space can be kept low, and it is possible to prevent the electrical components such as the solenoid valve and the electromagnetic connection portion from getting wet.

  Further, by reducing the space volume of the entire electromagnetic valve housing chamber, the volume fluctuation is reduced, the amount of water including water vapor flowing in due to the volume fluctuation can be reduced, and condensation can be hardly caused.

  As described in claim 2, the volume reducing portion is formed by projecting the electromagnetic valve cover by forming the surface of the electromagnetic valve cover facing the opening of the hydraulic unit housing so as to be close to the opening. It is possible to reduce the spatial volume of the upper region of the electromagnetic valve arrangement region sandwiched between the surface and the hydraulic unit housing. Moreover, such a volume reduction | decrease part can be created simultaneously as a part of housing | casing of a solenoid valve storage chamber. Therefore, it is possible to easily create the hydraulic pressure control device without making a design change such as the structure of the hydraulic pressure unit housing and the arrangement position of the electromagnetic valve.

  The invention described in claim 3 is characterized in that a pump motor power supply terminal (21) is provided in the lower space above the vent hole.

  According to the present invention, since the water level entering the lower space can be kept low, the pump motor power supply terminal is covered with water by providing the pump motor power supply terminal above the vent in the lower space. This can be prevented, and the reliability of the electrical connection portion is further improved.

  According to a fourth aspect of the present invention, the electromagnetic valve housing chamber includes at least one partition plate (14, 15,...) That prevents a fluid flow between the vent and the lower space between the vent and the lower space. 16, 17, 18) and a labyrinth portion (13) formed in part of the partition plate and having communication holes (14 a, 14 b, 15 a, 15 b, 16 a, 17 a) that allow fluid flow. It is characterized by being.

  Accordingly, the partition plate that prevents the flow of fluid between the lower space provided in the lower part of the solenoid valve placement region in the solenoid valve storage chamber and the vent hole at the bottom of the solenoid valve storage chamber and the partition plate Since the labyrinth part provided with the communication hole formed in a part is provided, inflow of water as a fluid from the vent hole can be suppressed while being allowed by the labyrinth part. Since such a labyrinth part can be formed as a part of lower space, it can be produced simultaneously as a part of case of an electromagnetic valve accommodation room. Therefore, it is possible to easily create the hydraulic pressure control device without making a design change such as the structure of the hydraulic pressure unit housing and the arrangement position of the electromagnetic valve.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

  A vehicle hydraulic pressure control apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a front view of a vehicle hydraulic pressure control device 1 (partially, a cross-sectional view taken along line AA in FIG. 2), FIG. 2 is a side view of the electromagnetic valve cover 4 viewed from the right side of FIG. 4 is an enlarged view of the left labyrinth portion 13 in FIG. 2, and FIG. 4 is a cross-sectional view of the labyrinth portion 13 taken along line BB in FIG. In each of FIG. 1 to FIG. 4, the upper part of the drawing indicates the vertically upward direction (also simply referred to as “upper” or “upper”) when the vehicle hydraulic pressure control device 1 is installed on the vehicle body. 1 and 4, the left and right sides of the paper are defined as the rear side and the front side in the depth direction (also simply referred to as the rear side and the front side). In FIGS. 2 and 3, the left and right sides of the paper surface are defined in the horizontal direction. Defined as left and right (also referred to simply as left and right). In FIG. 2, the solenoids 10a and 11a are illustrated as being arranged.

  The vehicle hydraulic pressure control apparatus 1 according to the present embodiment includes a hydraulic pump 2a that adjusts hydraulic pressure such as wheel cylinder pressure and electromagnetic valves 10 and 11 for vehicle control such as anti-skid control. A hydraulic unit housing 2 that houses the pressure mechanism, a pump motor 3 that drives the hydraulic pump 2a, a solenoid valve cover 4 that houses the solenoids 10a and 11a of the solenoid valves 10 and 11, and the solenoid valves 10 and 11 A circuit board cover 5 that covers the electronic circuit board 6 for controlling the pump motor 3 is integrally fixed and modularized. The hydraulic unit housing 2 and the pump motor 3 are made of metal, and the solenoid valve cover 4 and the circuit board cover 5 are formed by resin molding.

  One side of the solenoid valve cover 4 (the rear side in the depth direction in FIG. 1) is covered by being joined to the circuit board cover 5 by welding. The electromagnetic valve cover 4 is provided with a partition wall 4a (indicated by hatching in FIG. 1) in the vertical direction. The electronic circuit board 6 is enclosed in a substrate housing chamber 6a hermetically surrounded by the partition wall 4a and the circuit board cover 5. Is housed. The partition wall 4a is provided with a connector for supplying power from the electronic circuit board 6 to the pump motor 3, the electromagnetic valves 10, 11 and the like. The periphery of this connector is filled with a sealing material to maintain airtightness. ing.

  Further, the solenoid valve cover 4 is connected to the opening 2b of the hydraulic unit housing 2 and the screws 30 and 31 through an airtight packing 9 accommodated along a packing groove 8 provided on the outer peripheral portion of the solenoid valve cover 4. And so on. The space between the partition wall 4a of the solenoid valve cover 4 and the opening 2b of the hydraulic unit housing 2 serves as the solenoid valve housing chamber 7, and airtightness is maintained in portions other than the vent hole 19 described later.

  In the opening 2b of the hydraulic unit housing 2, four sets of solenoid valves 10 and 11 as hydraulic mechanisms (or four in the upper and lower rows) are configured so that a total of eight solenoids 10a and 11a protrude. ing. The solenoids 10a, 11a, etc. are accommodated in the electromagnetic valve arrangement region 7a in the portion near the center of the electromagnetic valve accommodating chamber 7, and are electrically connected to the electronic circuit board 6 via the partition wall 4a. In addition, a plurality of cylindrical sleeve members 20 that are partly arranged from the partition wall 4a are erected on the front side in the depth direction. The solenoids 10a and 11a are housed so as to be surrounded by the sleeve member 20 to facilitate positioning of the solenoids 10a and 11a during assembly.

  Further, the upper volume reducing portion 22 is formed so that the surface of the upper partition wall 4a such as the solenoids 10a and 11a is close to the opening 2b of the hydraulic unit housing 2, that is, the distance between the partition wall 4a and the hydraulic unit housing 2 is reduced. Is provided. Further, the side of the upper volume reducing portion 22 that contacts the solenoid 10a is formed in a cylindrical shape that is close to the outer peripheral portion of the solenoid 10a. In this manner, the volume of the upper space 23 sandwiched between the upper volume reducing portion 22, the opening 2 b of the hydraulic unit housing 2 and the four solenoids 10 a arranged in the horizontal direction is made as small as possible.

  On the other hand, the partition 4a and the hydraulic unit housing 2 are sandwiched between the lower part of the solenoid valve arrangement region 7a, more specifically, between the four solenoids 11a arranged in the horizontal direction and the outer wall of the solenoid valve cover 4. A lower space 12 is provided. Further, two sets of labyrinth portions 13 that form bent air passages between the lower space 12 and the outside of the electromagnetic valve cover 4 are provided below the lower space 12 at symmetrical positions in FIG. Yes. Below each labyrinth portion 13, vent holes 19 are provided as drainage drains communicating with the outside on the outer wall of the solenoid valve cover 4.

  In the lower space 12, a pair of pump motor power supply terminals 21 is erected between the two labyrinth portions 13 from the partition wall 4 a toward the front side in the depth direction. The position in the vertical direction of the power supply terminal 21 for the pump motor is above a lower communication hole 14b provided in a first partition plate 14 of the labyrinth portion 13 described later.

  As described above, in the electromagnetic valve housing chamber 7, the partition 4a is formed so as to protrude from the front in the depth direction, that is, close to the hydraulic unit housing 2 above the four solenoids 10a arranged in the horizontal direction. A volume reduction unit 22 is provided. Therefore, the volume of the space above the solenoid 10a is extremely small. Further, since the two rows of solenoids 10a and 11a and the sleeve member 20 are arranged close to each other, the space volume of the electromagnetic valve arrangement region 7a is also extremely small.

  Therefore, the space volume of the entire solenoid valve housing chamber 7 formed by the solenoid valve cover 4 and the hydraulic unit housing 2 is substantially the volume of the space below the four solenoids 11a arranged in the horizontal direction, that is, The volume of the lower space 12 and the space volume of the labyrinth 13 are substantially equal to the volume obtained by subtracting the occupied volume of the pump motor power supply terminal 21.

  As a form of water intrusion from the vent 19 due to a pressure change in the electromagnetic valve housing chamber 7, for example, infiltration by pressurization when the entire hydraulic pressure control device 1 is submerged, or operation of the hydraulic pressure control device 1 Intrusion due to a negative pressure in the electromagnetic valve housing chamber 7 caused by a rapid temperature drop due to flooding of the casing from a high temperature at the time can be considered. Furthermore, even if there is no actual water inflow as described above, the inflow of outside air occurs due to a volume change in the electromagnetic valve housing chamber 7 due to a change in outside air temperature or a change in atmospheric pressure. Condensation of water vapor contained in can also occur.

  Even when the electromagnetic valve accommodating chamber 7 is pressurized from the outside and water enters, or even when the electromagnetic valve accommodating chamber 7 has a negative pressure and water enters, an electromagnetic wave including an air passage such as the labyrinth portion 13 is contained. The amount of water of the ratio of the pressurized portion or the negative pressure with respect to the space volume of the entire valve accommodating chamber 7 enters the electromagnetic valve accommodating chamber 7, and the pressure is balanced inside and outside the electromagnetic valve accommodating chamber 7. Moreover, the inflow amount of outside air due to the volume change is also proportional to the space volume of the entire electromagnetic valve housing chamber 7.

  Therefore, since the absolute amount of intrusion moisture is proportional to the space volume of all the solenoid valve accommodation chambers, it is necessary to reduce the space volume of the solenoid valve accommodation chamber in order to reduce the amount of intrusion water.

  In this embodiment, since the space volume of the electromagnetic valve accommodating chamber 7 is reduced by providing the upper volume reducing portion 22, the amount of moisture permeating into the electromagnetic valve accommodating chamber 7 can be reduced. Therefore, the rise of the water level into the electromagnetic valve housing chamber 7 can be suppressed. Furthermore, since the inflow water vapor amount accompanying a volume change can also be reduced, dew condensation can be reduced.

  Furthermore, in the present embodiment, by providing the upper volume reducing portion 22, the substantial space volume of the electromagnetic valve housing chamber 7 is concentrated only below the electromagnetic valve arrangement region 7a. As a result, the water level of the water that enters with the pressure change in the electromagnetic valve housing chamber 7 can be kept at a position corresponding to the pressure equilibrium point in the space volume, that is, a predetermined position in the lower space 12. Furthermore, since the space volume itself in the electromagnetic valve storage chamber 7 is also reduced as described above, the amount of water that permeates itself can be reduced, thereby suppressing an increase in the water level.

  Furthermore, if the pump motor power supply terminal 21 through which a large current flows is disposed in the lower space 12 above the vent hole 19 and above the ingress water level, the pump motor power supply terminal 21 is prevented from being wetted. it can.

  Next, the left labyrinth portion 13 in FIG. 2 will be described with reference to FIGS. 3 and 4. Note that the right labyrinth portion 13 is in a line-symmetric relationship with the left labyrinth portion 13, and the same components are denoted by the same reference numerals and description thereof is omitted.

  The labyrinth portion 13 is composed of first to fifth partition plates 14 to 18. These first to fifth partition plates 14 to 18 are erected on the front side in the depth direction so as to be in contact with the hydraulic unit housing 2 from the partition 4a. In FIG. 3, the portions where the partition plates 14 to 18 and the hydraulic unit housing 2 are in contact are indicated by hatching. Further, the position where each partition plate 14 to 18 and the hydraulic unit housing 2 are in contact with each other in FIG. 4 is referred to as a surface position (simply a surface position) of the electromagnetic valve cover 4.

  The first partition plate 14 is formed of a flat plate, is located farthest vertically upward from the vent hole 19, that is, is in contact with the lower space 12, and is inclined with respect to the horizontal direction. An upper communication hole 14a cut into a height h, that is, a rectangular shape, is provided on the inclined upper portion of the first partition plate 14 on the rear side in the depth direction from the surface position over a predetermined length. In the following, all of the other communication holes are rectangular.

  In addition, a lower communication hole 14b that is cut by a height h on the rear side in the depth direction from the surface position over a predetermined length is also provided in the inclined lower portion of the first partition plate 14. Accordingly, the upper side of the first partition plate 14 has a function of a drainage channel in which water that has entered the lower space 12 flows from the upper communication hole 14a toward the lower communication hole 14b as shown by the arrow in FIG. .

  The second partition plate 15 is formed of a semi-cylindrical plate extending in the depth direction, and is provided close to the vent hole 19. At both ends of the semi-cylinder of the second partition plate 15, two communication holes 15 a and 15 b that are cut by a height h from the surface position to the rear side in the depth direction are provided for a predetermined length. The vent 19 is located behind the surface of the solenoid valve cover 4 in the depth direction. Thereby, for example, even if the electromagnetic valve housing chamber 7 becomes negative pressure, the water is more vigorous than the vent hole 19, that is, even if the water flows in at a high flow rate, the water is always supplied as shown by the arrow in FIG. After colliding with the inner surface of the 15 semi-cylindrical plates and reducing the water force, they reach the communication holes 15a and 15b. Therefore, the water is prevented from reaching the communication holes 15a and 15b directly from the vent hole 19 and the water force is further reduced, so that the intrusion of water from the second partition plate 15 toward the lower space 12 can be suppressed.

  The first partition plate 14 and the second partition plate 15 are connected by third to fifth partition plates 16 to 18. The third partition plate 16 is constituted by a flat plate, and is arranged so as to connect the vicinity of the upper communication hole 14a of the first partition plate 14 and the semicircular top portion P of the second partition plate 15 in the vertical plane. A communication hole 16a is formed vertically below the third partition plate 16, that is, in the vicinity of the semicircular top portion P of the second partition plate 15 by a height h from the surface position over the predetermined length. Is provided.

  The fourth partition plate 17 is formed of a flat plate, and is arranged so as to connect the substantially central portion of the first partition plate 14 and the semicircular top portion P of the second partition plate 15 in the vertical plane. A communication hole 17a is formed vertically below the fourth partition plate 17, that is, in the vicinity of the semicircular top portion P of the second partition plate 15, by a height h from the surface position in the depth direction. The third partition plate 16 is provided so as to be continuous with the communication hole 16 a. The length of the cutout of the communication hole 16a on the vertical plane is set longer than the cutout length of the communication hole 17a. That is, the opening area of the communication hole 16a is larger than the opening area of the communication hole 17a.

  The fifth partition plate 18 is formed of a flat plate, and is arranged so as to connect the vicinity of the lower communication hole 14b of the first partition plate 14 and the semicircular top portion P of the second partition plate 15 in the vertical plane. The fifth partition plate 18 is not provided with a communication hole.

  The labyrinth portion 13 has five partition regions 13 a, 13 b, 13 c, 13 d, and 13 e that communicate with each other by the first to fifth partition plates 14 to 18 and the outer wall of the electromagnetic valve cover 4 arranged in this way. It is formed.

  The labyrinth portion 13 including the partition plates 14 to 18 and the communication holes 14 a to 17 a as described above can be molded simultaneously with the upper volume reducing portion 22 as a part of the electromagnetic valve cover 4. Moreover, since the labyrinth part 13 is provided in the part under the lower space 12, the freedom degree of design is accept | permitted and it can design easily. The labyrinth part 13 can also be regarded as a part of the lower space 12.

  The flow of water in the labyrinth portion 13 configured as described above is as follows. When water enters the partition region 13d from the vent 19, the water enters the partition region 13b through the communication hole 15a. In addition, since there is only one place of the communication hole 15b in the partition area 13e, there is almost no water intrusion.

  When the momentum of water flowing into the partition region 13d from the vent 19 is high, that is, when the flow velocity is high, first, the flowing water collides with the cylindrical inner surface of the first partition plate 15 and reverses toward the vent 19 Bounced back. In the partition region 13d, the collision with the inner surface of the cylinder and the inflow direction from the vent hole 19 and the flow direction from the vent hole 19 to the communication hole 15a are substantially perpendicular, so that the water force can be effectively reduced. it can. Then, the water enters the lower space 12 by following the path of the partition region 13d → the communication hole 15a → the partition region 13b → the communication hole 16a → the partition region 13a → the upper communication hole 14a → the lower space 12.

  Here, since the opening area of the communication hole 16a is larger than that of the communication hole 17a, water enters the partition area 13a mainly from the partition area 13b via the communication hole 16a. That is, the communication hole 16a functions as an inflow communication hole. Furthermore, even if water enters the partition region 13b vigorously from the communication hole 15a, the third partition plate 16 exists in the intrusion direction, so that the intruded water collides with the third partition plate 16 and vigorously. Will be reduced, and it will be suppressed to reach the upper communication hole 14a directly. Thereby, it is suppressed that water permeates into the lower space 12 through the upper communication hole 14a.

  Then, the water that has entered the lower space 12 flows down on the surface of the first partition plate 14 from the upper communication hole 14a toward the lower communication hole 14b, and the lower communication hole 14b → the partition region 13c → the communication hole 17a → the partition region. It is discharged to the outside of the solenoid valve cover 14 through a route of 13b → communication hole 15a → partition region 13d → ventilation port 19. Thus, the communication hole 17a functions as a discharge communication hole.

  Since the labyrinth portion 13 is configured as described above, the inflow of water from the vent hole 19 is suppressed by the second partition plate 15. Furthermore, the water that has entered the lower space 12 can be quickly discharged downward from the lower communication hole 14 b by the inclined structure of the first partition plate 14.

  Thereby, it is difficult for water to flow into the lower space 12 in the electromagnetic valve cover 4, and even if water enters once, it can be quickly discharged to the outside.

  In addition, since the pump motor power supply terminal 21 is positioned above the lower communication hole 14b of the first partition plate 14 in the vertical direction in the lower space 12, the water that has entered the lower space 12 is in the lower communication hole 14b. By utilizing the fact that it is discharged quickly, it is possible to suppress the pump motor power supply terminal 21 through which a relatively large current flows from being immersed in water, and to improve the reliability of the hydraulic pressure control device 1. Can do.

  In addition, when the vent 19 itself is immersed in water and the water level gradually rises, the flow rate of water flowing from the vent 19 is small. In such a case, the water level inside the labyrinth portion 13 also gradually rises without distinction between the partitioned regions 13b, 13c and 13a. Then, water enters the lower space 12 through the lower communication hole 14b. Further, when the water level decreases, water is quickly discharged from the lower communication hole 14b. Therefore, the position of the water level in the lower space 12 can be kept as small as possible.

(Other embodiments)
In the above embodiment, the upper volume reducing portion 22 is formed by projecting a part of the partition wall 4a of the electromagnetic valve cover 4 toward the opening 2b of the hydraulic unit housing 2, that is, in the depth direction front side. Although the distance between the two is shortened and the volume of the upper space 23 sandwiched between the two is minimized, the present invention is not limited to this. That is, in order to reduce the space volume of the electromagnetic valve housing chamber 7 and to reduce the volume of the upper space 23 above the electromagnetic valve arrangement region 7a, the hydraulic unit housing 2 side is not used to project the partition wall 4a. It is also possible to provide an upper volume reduction part in the upper part and project the upper volume reduction part toward the partition wall 4a, that is, to the rear side in the depth direction. Furthermore, the upper space 23 itself may be eliminated by forming the outer wall of the solenoid valve cover 4 in the vicinity of the solenoid 10a.

It is a front view of the hydraulic control apparatus for vehicles of the embodiment of the present invention. It is a side view of the solenoid valve cover 4 seen from the right side surface of FIG. It is an enlarged view of the left labyrinth part 13 in FIG. FIG. 5 is a cross-sectional view of the labyrinth portion 13 taken along BB in FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Fluid pressure control apparatus, 2 ... Fluid pressure unit housing, 3 ... Pump motor,
4 ... Solenoid valve cover, 7 ... Solenoid valve storage chamber, 7a ... Solenoid valve placement area,
10, 11 ... Solenoid valve, 10a, 11a ... Solenoid, 12 ... Lower space,
13 ... Labyrinth part, 14-18 ... Partition plate, 19 ... Vent (drainage drain),
21 ... Power supply terminal for pump motor, 22 ... Upper volume reduction part, 23 ... Upper space.

Claims (4)

A hydraulic unit housing (2) for accommodating a hydraulic mechanism having a pump motor (3) for adjusting hydraulic pressure for vehicle control and a plurality of electromagnetic valves (10, 11); and one end of the hydraulic unit housing A vehicle hydraulic pressure control device including an electromagnetic valve cover (4) coupled to the hydraulic unit housing so as to cover an opening (2b),
The electromagnetic valve is accommodated in an electromagnetic valve arrangement region (7a) in an electromagnetic valve accommodating chamber (7) formed by the opening and the electromagnetic valve cover,
In the electromagnetic valve storage chamber,
A vent hole (19) for communicating the electromagnetic valve housing chamber and the outside air is formed at the bottom,
A lower space (12) having a predetermined volume is formed between the electromagnetic valve placement region and the vent; and
The vehicle hydraulic pressure control device according to claim 1, wherein a volume reducing portion (22) is provided in an upper region opposite to the lower space in the electromagnetic valve arrangement region. 2. The vehicular fluid according to claim 1, wherein the volume reducing portion is formed such that a surface of the electromagnetic valve cover facing the opening of the hydraulic unit housing is close to the opening. Pressure control device. The vehicle hydraulic pressure control apparatus according to claim 1 or 2, wherein a pump motor power supply terminal (21) is provided in the lower space above the vent hole. The electromagnetic valve housing chamber includes at least one partition plate (14, 15, 16, 17, 18) that prevents a fluid flow between the vent and the lower space between the vent and the lower space. ) And a communication hole (14a, 14b, 15a, 15b, 16a, 17a) that is formed in a part of the partition plate and allows the flow of the fluid, is formed. The vehicle hydraulic pressure control device according to any one of claims 1 to 3.

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