JP2001080486A - Hydraulic control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a high drain performance with a simple structure by forming a water discharge route and breathing route for communicating between the motor for a pump drive and atmosphere in the housing body of a hydraulic unit. SOLUTION: A downward vertical hole 25 is formed inside a housing body 21 from the through hole 24a for upper wiring toward a bottom surface 21c. The vertical hole 25 is formed by communicating the through holr 24a for upper wiring, bearing chamber 23 and through hole 24b for lower wiring respectively. Here, a water discharge route is formed by the through hole 24b for lower wiring and the lower half of the vertical hole 25 communicated therewith. A breathing port 26a is formed on the exposure end of the side surface 21a of the housing body 21. One part of the breathing route is formed by the section communicated in the motor 30 through a horizontal hole 26 communicating with the atmosphere through the breathing port 26a, a bearing chamber 23 communicating therewith, the upper half of the vertical hole 25 communicating therewith and the upper through hole 24a communicating therewith. Further, a water head difference (h) is provided between respective atmosphere exposure port of the water discharge route and breathing route.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic control device used for skid control of a vehicle (for example, ABS, TCS, vehicle behavior control, etc.), and more particularly to an improvement in a drain structure of a motor for driving a hydraulic pump.

[0002]

2. Description of the Related Art A hydraulic control device of this type includes a plurality of solenoid valves and a hydraulic pump, and a housing body having a flow passage formed therein, and an integrated hydraulic pump integrated with the housing body. And a driving motor. Then, based on a control system of a control unit integrated with the housing body or provided separately, the structure is such that the hydraulic pressure can be controlled by driving each electromagnetic valve and motor.

[0003] This type of device is equipped with a number of electrical components, but it is particularly important to take measures against water intrusion from the interface between the housing body and the motor. As a countermeasure against water ingress from a contact surface between the housing body and the motor, there are known a completely sealed structure in which a sealing material is closely attached and a structure in which a downward drain hole is opened in the motor.

[0004]

<A> Water accumulated in the motor due to damage to the sealing material or the like is difficult to drain.
If water stays in the motor for a long period of time, electrical contact portions such as rotating brushes and wiring connection portions may cause poor contact, or may cause sticking, corrosion, or wear due to rust, resulting in malfunction. <B> In the structure where the motor has a drain hole,
It is necessary to take a new countermeasure against inundation through the drain hole in the motor, and it is necessary to perform additional processing for forming the drain hole in the motor housing cover. In the case of the structure in which the drain holes are provided in the motor, the structure of the motor becomes complicated, which causes an increase in the cost of the motor. <C> In the case of a structure in which a drain hole is provided in the motor, if the inside of the motor is hot, if the washing water or muddy water is used, the air in the motor will be cooled and contract, and as a result, water will flow into the motor through the drain hole Risk of inhalation. If water is sucked into the motor, the same problem as described in <A> occurs.

[0005] The present invention has been made in view of the above points, and an object of the present invention is to provide a hydraulic pressure control device which can ensure high drain performance with a simple structure. Still another object of the present invention is to provide a hydraulic pressure control device capable of draining water without any improvement to the motor.

[0006]

The invention according to claim 1 is
A hydro unit in which at least a plurality of solenoid valves, a hydraulic pump, and a pump driving motor are assembled in a housing body having a flow passage formed therein, and a control board disposed inside the housing body in a shielded state on one side of the housing body A drain unit and a breathing unit, which communicate between the pump drive motor and the atmosphere, are formed in a housing body of the hydro unit. The hydraulic pressure control device is characterized in that a head difference is provided between the respective air exposure ports. According to a third aspect of the present invention, in the first or second aspect, a lateral hole communicating with the atmosphere, a bearing chamber communicating with the lateral hole, and the bearing chamber communicate with the inside of the upper portion of the motor across the bearing of the motor. A hydraulic pressure control device characterized in that a respiratory route is constituted by a route. According to a third aspect of the present invention, in the first aspect, the conductive terminal extending from the motor penetrates the through hole of the housing body and is electrically connected to the control board, and the through hole is connected to one of the drain passage and the breath passage. This is a hydraulic control device characterized by comprising a part. The invention according to claim 4 is the invention according to claims 1 to 3,
The hydraulic pressure control device is characterized in that both the drainage path and the respiration path communicate with each other by a vertical hole via a bearing chamber. According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the air exposure port of the breathing path formed in the housing body of the hydro unit communicates with the coil chamber in the ECU body constituting the control unit. And a communication port that communicates between the coil chamber and the atmosphere is provided in a part of the ECU body, and a head difference is provided between the communication port and an exposure port of a drain passage. Device. The invention according to claim 6 is the invention according to claim 5, wherein the EC
A hydraulic pressure control device characterized in that a protective eave is formed above a communication port of a U body to meander a space between the communication port and a coil chamber. According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the air exposure port of the respiratory path is positioned higher than the air exposure port of the drain path, and a head difference is provided between the two ports. This is a hydraulic pressure control device.

[0007]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. <A> Basic Configuration of Pressure Control Device FIG. 1 is a front view of the pressure control device as viewed from the control unit 10 side, FIG. 2 is a bottom view thereof, and FIG. 3 is a longitudinal sectional view thereof.

The hydraulic pressure control device is constructed by attaching the control unit 10 to one side of the hydro unit 20 with bolts 11.

<B> Hydro Unit As shown in FIG. 3, the hydro unit 20 includes a housing body 21 having a rectangular parallelepiped shape. A flow path (not shown) is formed in the housing body 21 and a control device such as a hydraulic pump and a reservoir is built therein. The control unit 10 is provided on one side surface 21 a of the housing body 21 and is fixed with bolts 11. Further, a valve body having a built-in valve mechanism is provided on one side surface 21a of the housing body 21. The solenoid valve 40 is constituted by the valve body and a donut-shaped coil provided on the valve body.

A motor 30 for driving the hydraulic pump is disposed on the other side surface 21 b of the housing body 21, and a bearing 32 for supporting a rotating shaft 31 is fitted in the recess 22 of the housing body 21. It is fixed to the housing body 21 by a bolt 34 inserted into the portion. The rotating shaft 31 of the motor 30 is inserted into a bearing chamber 23 formed in the housing body 21.

The motor 30 has a pair of upper and lower conductive terminals 34, 3
In the known motor provided with No. 4, no additional processing such as directly forming a drain hole in the motor 30 is performed. These terminals 34, 34 are respectively inserted through wiring through-holes 24 a, 24 b formed in upper and lower positions of the housing body 21, and are electrically connected to the control board 12 in the control unit 10. Each wiring through hole 24a, 24b and each conductive terminal 34,
An air-permeable gap is formed between the peripheral surfaces of the cylinder 34. In this example, a case will be described in which the structure is simplified by using the upper and lower wiring through holes 24a and 24b as a relay path for a breathing path and a drain path.

As shown in FIG. 3, a downward vertical hole 25 is formed in the housing body 21 from the upper wiring through hole 24a to the bottom surface 21c. The vertical hole 25 is formed so as to communicate with the upper wiring through hole 24a, the bearing chamber 23, and the lower wiring through hole 24b, respectively, and forms a drain port 25a at an exposed end of the bottom surface 21c. In this example, the lower wiring through hole 24b and the lower half of the vertical hole 25 communicating therewith are defined as drainage paths. In addition to the drainage action in the motor 30, the drainage path also allows the minute amount of brake fluid leaking from the hydraulic pump communicating with the bearing chamber 23 to discharge the motor 30.
It also has the function of discharging through the vertical hole 25 without entering the inside.

Further, a horizontal hole 26 communicating with the bearing chamber 23 and the upper half of the vertical hole 25 is formed in the housing body 21, and a breathing port 26a is formed at an exposed end of one side surface 21a.

When communicating with the atmosphere through the breathing port 26a, the motor 30 is passed through the horizontal hole 26, the bearing chamber 23 communicating with the horizontal hole 26, the upper half of the vertical hole 25 communicating with the bearing chamber 23, and the upper through hole 24a communicating with this. The section communicating with the inside constitutes a part of the respiratory path. Reference numeral 27 denotes a mounting bolt provided at a lower portion of the housing body 21.

<C> Control Unit The control unit 10 includes an ECU body 13 in which a coil chamber 13b is formed, and a cover 14 that covers the ECU body 13.
And a control board 12 supported by the ECU body 13 and covered by a cover 14. The opening side of the ECU body 13 is in contact with one side surface of the housing body 21 via the sealing material 13a, and a high sealing property is secured in the contact surface portion.

The control board 12 is electrically connected to the conductive terminals 34, 34 extending from the motor 30 and the coil of the solenoid valve 40, and controls the operation of the motor 30 and the solenoid valve 40 based on a control program. I can do it.

As described above, when substantially the entire area of one side surface 21a of the housing body 21 is covered with the ECU body 13, the breathing port 26a is shut off from the atmosphere, and the atmospheric pressure cannot be introduced into the motor 30 through the above-described breathing path. Therefore, it is preferable to form communication ports 15 on the side surface of the ECU body 13 so that the coil chamber 13b in the ECU body 13 communicates with the atmosphere.

In this embodiment, the coil chamber 13b communicates with the atmosphere through the communication ports 15, 15, the horizontal hole 26 communicates with the coil chamber 13b through the respiration port 26a, the bearing chamber 23 communicates with the horizontal hole 26, and the bearing chamber 23. The section communicating with the inside of the motor 30 through the upper half of the vertical hole 25 and the upper through hole 24a is defined as a breathing path.

A communication port 1 is provided on the side of the ECU body 13.
If the ports 5 and 15 are left open, foreign substances such as water and mud may enter through the communication ports 15 and 15. In order to prevent such intrusion, the protective eaves 16, 16 projecting above the communication ports 15, 15 are formed integrally with the ECU body 13 so as to meander the space in the ECU body 13. It is possible to prevent foreign matter from entering through the communication ports 15, 15 while keeping the breathing port 26a of the communication port open to the atmosphere.

As shown in FIG. 3, the communication port 15 of the ECU body 13 may be formed higher than the drain port 25a of the housing body 21, and a head difference h may be formed between the two ports 15, 25a. It is important. This is because the water in the motor 30 and the ECU body 13 is easily discharged to the outside by using the head difference h.

[0021]

Next, the drainage operation of the hydraulic control device having the above-described structure will be described. <B> Drainage action in the motor Breathing path formed in the hydro unit 20 (communication ports 15, 15 of the ECU body 13, the coil chamber 13b in the ECU body 13, the breathing port 26a formed in the housing body 21, a side hole) 26, the bearing chamber 23, the upper half of the vertical hole 25, and the section communicating with the motor 30 through the upper through hole 24a), the inside of the motor 30 communicates with the atmosphere. Therefore, when water droplets are generated in the motor 30, the water propagates through the motor housing cover 33 and the lower through holes 24
After passing through b, it is discharged through the lower half of the vertical hole 25.

In particular, when the bearing 32 shown in FIG. 3 is wet with water, a fluid film such as an oil film is formed, which tends to impair the air permeability inside and outside the motor 30. In the present invention, the inside and outside of the motor 30 are respiratory paths. And a water distribution path (a lower wiring through hole 24b communicating with the motor 30; a bearing chamber 23 communicating with the wiring through hole 24b; a lower half of a vertical hole 25 communicating with the bearing chamber 23;
Since the air is communicated with the atmosphere through two paths (a continuous section 5a), the air permeability inside and outside the motor 30 is not impaired.

Further, when the temperature in the motor 30 is high, the air in the motor is rapidly cooled by bathing in washing water or muddy water, and the air in the motor 30 tends to contract. Previously, there was a risk of water being drawn into the motor through the drain hole.

On the other hand, in the present invention, since the inside and outside of the motor 30 communicate with the atmosphere through two paths as described above, even if the air in the motor 30 is rapidly cooled,
No negative pressure is generated inside. Therefore, there is no fear that water is sucked up through the vertical breathing holes 25.

In some cases, a very small amount of brake fluid leaks from the hydraulic pump into the bearing chamber 23. The leaked brake fluid does not enter the motor 30, but the vertical hole 25 communicates with the bearing chamber 23. Is discharged through.

<B> Drainage Action of Control Unit When water tries to enter through the communication port 15 provided on the side surface of the ECU body 13, the water is blocked by the protective eaves 16 which protrude above the communication port 15. The above intrusion is prevented. Even if water enters the ECU body 13 for some reason, the water in the ECU body 13 is discharged through the communication port 15 because the communication between the communication port 15 and the drain port 25a is in communication.

<C> Other drainage action For example, the entire hydraulic pressure control device may be covered with water, etc.
When the water is simultaneously flooded into both the inside of the ECU body 13 and the inside of the housing body 21 through the vertical hole 25, the communication port 15 and the drain port 25a of the ECU body 13 are provided.
, The surface tension balance is lost, and the water in the ECU body 13 is discharged to the outside through the communication port 15 and the water in the housing body 21 is discharged to the outside through the vertical hole 25.

[0028]

Second Embodiment In the first embodiment described above, the case where the coil chamber 13b and the communication port 15 formed in the ECU body 13 of the control unit 10 are included in the breathing path has been described. The breathing route may be provided only in the housing body 21 constituting the hydro unit 20.

That is, instead of the lateral hole 26 exposed on one side surface 21a of the housing body 21, an oblique hole (shown in the drawing in FIG. ) Are formed. The breathing port formed at the exposed end of the oblique hole is positioned higher than the drain port 25a to form a head difference between the two ports as in the above-described embodiment.

In the present embodiment, there is an advantage that it is not necessary to perform additional processing on the control unit 10 and it is only necessary to perform processing for forming a breathing hole in the housing body 21, so that workability is improved.

[0031]

Third Embodiment The conductive terminal 3 of the motor 30 has been described above.
Although a case has been described in which the wires 4 and 34 are inserted through the housing body 21 and wired, the present invention can be applied to a type in which the conductive terminals of the motor 30 are wired outside the housing body 21. In the case of this example, the housing body 21
In this case, it suffices to simply form holes communicating from the vertical hole 25 to the upper and lower portions of the motor 30.

[0032]

According to the present invention, the following effects can be obtained. <A> By forming the breathing path and the drain path by communicating with the inside and outside of the motor, the water in the motor can be reliably drained. In particular, in the conventional structure, air is ventilated in the gap between the bearings of the motor, so that when a liquid leaks from the hydraulic pump, an oil film is generated in the gap, the air permeability is impaired, and the drainage is reduced. Although there was a concern, in the present invention, even if the air permeability of the bearing portion is impaired, the air permeability inside and outside the motor is not impaired through two breathing paths. Therefore, the electric components in the motor are protected from rust and corrosion, and the warranty period of the motor operation is prolonged. <B> By providing a head difference at each exposed port of the respiration path and the drainage path communicating with the inside and outside of the motor, not only the drainage performance is improved, but also the negative pressure is generated inside the motor when the motor is rapidly cooled. Avoiding the inhalation of water through the respiratory path. <C> The design can be simplified by using the wiring through-hole formed in the housing body as a relay path for the breathing path and the drain path. <D> By forming a protective eave above the communication port of the ECU body constituting the control unit to meander the space in the ECU body, water and the like through the communication port can be maintained while keeping the breathing path in communication with the atmosphere. Foreign matter can be prevented from entering. <E> A minute amount of brake fluid leaked from the hydraulic pump into the bearing chamber can be discharged through a vertical hole communicating with the bearing chamber.

[Brief description of the drawings]

FIG. 1 is a front view of a fluid pressure control device in which a part of an ECU body is broken.

FIG. 2 is a bottom view thereof.

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Control unit 11 Bolt 12 Control board 13 ECU body 13b Coil room 14 Cover 15 Vent 16 Protective hood 20 Hydro unit 21 Housing body 22 Depression 23 Bearing room 24, 24 Wiring through hole 25 Vertical hole 26 Horizontal hole 30 Motor 31 Rotation Shaft 32 Bearing 34, 34 Conductive terminal 40 Solenoid valve

Claims (7)

[Claims] 1. A hydro unit in which at least a plurality of solenoid valves, a hydraulic pump, and a pump driving motor are assembled to a housing body having a flow path formed therein, and a hydro unit provided on one side of the housing body in a shielded state. A hydraulic pressure control device comprising a control unit having a control board disposed therein, wherein a drainage path and a breathing path communicating between the inside of the pump driving motor and the atmosphere are formed in a housing body of the hydro unit. A hydraulic pressure control device, wherein a head difference is provided between each air exposure port of a drainage path and a breathing path. 2. A breathing path according to claim 1, comprising a lateral hole communicating with the atmosphere, a bearing chamber communicating with the lateral hole, and a path extending between the bearing chamber and the upper portion of the motor across the bearing of the motor. A hydraulic pressure control device, characterized in that: 3. The device according to claim 1, wherein the conductive terminal extending from the motor penetrates through the through hole of the housing body and is electrically connected to the control board. A hydraulic pressure control device, which forms a part. 4. The hydraulic pressure control device according to claim 1, wherein both the drainage path and the breathing path communicate with each other by a vertical hole via a bearing chamber. . 5. The ECU according to claim 1, wherein the air exposure port of the breathing path formed in the housing body of the hydro unit is an ECU that constitutes a control unit.
In addition to communicating with the coil chamber in the body, a communication port for communicating between the coil chamber and the atmosphere is provided in a part of the ECU body, and a head difference is provided between the communication port and the exposure port of the drainage path. A hydraulic pressure control device. 6. The hydraulic pressure control device according to claim 5, wherein a protective eave is formed above the communication port of the ECU body to meander a space between the communication port and the coil chamber. 7. The air conditioner according to claim 1, wherein the air exposure port of the respiratory path is positioned higher than the air exposure port of the drain path, and a head difference is provided between the two ports. Characteristic, hydraulic control device.