JPH1059151A - Liquid pressure controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid pressure controller in which performance of a solenoid valve can be securely assured while effects of a manufacturing tolerance are avoided. SOLUTION: A coil part 52 for composing a solenoid valve 50 is constituted by coating an outer circumference including both end parts of a coil 52b wound around a bobbin 52b with an insulation layer 53 having elasticity, the coil 52 is elastically positioned by the insulation layer 53, and an inner circumferential surface of a yoke 52c is put to get in contact with a valve body 51b to form a magnetic circuit 55.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic control system for a vehicle equipped with an ABS, TCS or the like for electronically controlling the hydraulic pressure of wheels, and more particularly, to a hydraulic control device in which an electronic control unit is integrated with a hydraulic unit. It relates to a control device.

[0002]

2. Description of the Related Art An integral-type hydraulic pressure control apparatus in which an electronic control unit is integrated with a hydraulic pressure unit having a plurality of solenoid valves and a hydraulic pressure pump is disclosed in, for example, Japanese Patent Laid-Open No. 4-3 / 1993.
No. 72444.

[0003]

An electromagnetic valve provided in this type of hydraulic control device includes a dome-shaped valve portion having a built-in valve mechanism, and a donut-shaped coil portion provided outside the valve portion. The magnetic path is formed by bringing the end surface of the yoke constituting the coil portion into contact with the end surface of the valve body or the end surface of the valve block. Due to manufacturing tolerances, if the yoke is shorter than the design dimension, the end face of the yoke will be separated from the end face of the valve body or the end face of the valve block to form a magnetic path, and if the yoke is longer than the design dimension, the magnetic path will not be formed. Although it can be formed, there is an inconvenience that the cover covering the solenoid valve does not close. As described above, it has been pointed out that the performance of the solenoid valve is greatly affected by the manufacturing tolerance of the cover that covers the coil portion and the solenoid valve.

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 capable of reliably guaranteeing the performance of a solenoid valve while avoiding the effects of manufacturing tolerances. Is to do.

[0005]

The invention according to claim 1 is
In a hydraulic pressure control device that covers at least one side surface of a hydraulic unit including at least a plurality of electromagnetic valves with a cover and electromagnetically operates the electromagnetic valves with an electronic control unit having a built-in control board, a coil unit that constitutes the electromagnetic valve includes: The outer circumference including both ends of the coil wound around the bobbin is covered with an elastic insulating layer, and the coil is sandwiched between the hydraulic unit and the cover by the insulating layer, and is formed in the axial direction and the circumferential direction. A hydraulic pressure control device characterized by being elastically positioned in a direction.
The invention according to claim 2 is the hydraulic pressure control device according to claim 1, wherein the connection terminal protruding from the coil is integrally covered with an insulating layer and subjected to waterproofing.
According to a third aspect of the present invention, in the first aspect, the coil portion is provided on a valve portion constituting the solenoid valve, and one end of the coil portion is in contact with a valve body of the valve portion via an insulating layer. A hydraulic pressure control device, characterized in that the other end of the coil portion is positioned in contact with a part of a cover. According to a fourth aspect of the present invention, in the first aspect, the coil portion is provided on a valve portion constituting the solenoid valve, and one of the coil portions is brought into contact with a valve body of the valve portion via an insulating layer. A hydraulic pressure control device, characterized in that the other of the parts is positioned by being brought into contact with a retaining ring mounted on a valve part. The invention according to claim 5 is the liquid according to any one of claims 1 to 4, wherein a magnetic path is formed by bringing an inner peripheral surface of a yoke constituting the solenoid valve into contact with the valve body. It is a pressure control device. The invention according to claim 6 is the invention according to claim 1.
6. The hydraulic pressure control device according to claim 5, wherein the coil and the control board are electrically connected to each other via a flexible relay conductor disposed in the cover. . According to a seventh aspect of the present invention, in any one of the first to fifth aspects, a flexible connection terminal is attached to the coil, and a free end of the connection terminal is directly connected to the control board. , A hydraulic control device.

[0006]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

<A> Outline of Hydraulic Pressure Control Device FIG. 2 shows an example of an integral type hydraulic pressure control device. This hydraulic pressure control device is configured by integrating a hydraulic pressure unit 10 and an electronic control unit 20.

<B> Hydraulic Unit The hydraulic unit 10 has a valve block 30 and at least a plurality of solenoid valves 40 are incorporated in the valve block 30.
A liquid passage is bored therein. The valve block 30 also incorporates a hydraulic pump (not shown) and motors for driving the same, but the built-in components are appropriately determined according to various known systems.

<C> Solenoid Valve The solenoid valve 50 includes a dome-shaped valve portion 51 and a cylindrical coil portion 52 provided on the valve portion 51. The valve portion 51 has a structure in which a normally open or normally closed valve mechanism is incorporated in a dome-shaped sleeve 51a, and an internal valve element opens and closes a flow path by an electromagnetic force of the coil portion 52. 51
A valve body 51b integral with a is accommodated in the accommodation hole 31 having a different diameter of the valve block 30, and fixed by means such as caulking.

Referring to FIG. 1, the internal structure and the mounting structure of the coil portion 52 provided on the valve portion 51 will be described. The coil 52b wound on a donut-shaped bobbin 52a and the outer periphery including both ends of the bobbin 52a are described. Are covered with an insulating layer 53 having elasticity, and a yoke 52c is provided on the outer periphery thereof. The bobbin 52a and the yoke 52c are partially in contact.

A connection terminal 54 is provided at an end of the coil 52b, and is electrically connected to a relay conductor 40 described later by soldering, fusing, welding, or the like. Insulating layer 53
Is molded by an integral mold of rubber. In addition to positioning the donut-shaped coil 52b, it functions as a shock absorbing material for absorbing vibration and further absorbs manufacturing tolerances of the coil portion 53 and the solenoid valve cover 21. Also works. At the time of assembly, the coil portion 52 is externally mounted on the valve portion 21,
The lower portion of the insulating layer 53 in the drawing abuts on the valve body 51b,
The upper part of the yoke 52c abuts on the protrusion 21c of the solenoid valve cover 21 and is elastically positioned in the axial and circumferential directions. It is desirable that the skirt of the connection terminal 54 be integrally covered with a part of the insulating layer 53 and the connection terminal 54 be waterproofed.

By the way, as described above, the magnetic path is formed by hitting the end face of the yoke 52c constituting the coil section 52 to the end face of the valve body 51b or the end face of the valve block 30. Assuming a case in which the above-described structure in which the entire coil 52b is covered with the insulating layer 53 is adopted for an electromagnetic valve having such a structure for forming a magnetic path, if the yoke 52c is shorter than the design size due to manufacturing tolerances, The end face cannot be separated from the end face of the valve body 51b or the end face of the valve block 30 to form a magnetic path. Conversely, if the yoke 52c is longer than the design dimension, the magnetic path can be formed, but the electromagnetic valve cover 21 cannot be formed. Not only does it not close, but also the buffer function of the insulating layer 53 is lost.

Therefore, the present invention solves the above-mentioned problem, that is, forms the magnetic path 55 by covering the outer periphery of the coil 52b with the insulating layer 53 and bringing the inner peripheral surface of the yoke 52c into contact with the valve body 51b. In addition, it is possible to exhibit the buffer function of the insulating layer 53 and absorb the manufacturing tolerance of the coil portion 53 and the electromagnetic valve cover 21.

<D> Electronic Control Unit In FIG. 2, the electronic control unit 20 includes an electromagnetic valve cover 21 that covers the electromagnetic valve 50, an ECU cover 22 provided outside the electromagnetic valve cover 21, and a control housed in the ECU cover 22. It is composed of a board 23 and a relay conductor 40 for electrically connecting between the control board 23 and the coil section 52.
Both covers 21 and 22 pass through bolts and the like, and
0 is detachably fixed.

A sealing material 21a is provided on the entire circumference of the end face on the opening side of the electromagnetic valve cover 21 so that high sealing performance with the valve block 10 can be ensured.

The cover 21b of the solenoid valve cover 21 is provided with a projection 21c for pressing the top of the coil 52 inward (see FIG. 3). Further, a continuous groove is formed on the top peripheral edge of the electromagnetic valve cover 21, and a seal 21 d is accommodated in the groove, and the open end 22 a of the ECU cover 22 is fitted to fit between the two covers 21 and 22. Can be sealed well.

The control board 23 includes electronic parts 24 such as an ECU necessary for control, and is attached to the cover 21b of the solenoid valve cover 21. A connector (not shown) that can be electrically connected to an external harness is formed on a part of the electromagnetic valve cover 21 or the ECU cover 22.

<E> Relay conductor According to the present invention, the coil portion 52 and the control board 23 are electrically connected by using the relay conductor 40 disposed in the electromagnetic valve cover 21. That is, as the relay conductor 40, for example, a known bus bar formed by laminating a band-shaped conductor on a flexible insulating substrate 41 as shown in FIG. 4 can be used, and a pair of connection terminals 54, A plurality of terminals 42 connected to 54 are formed, and an opening 43 is opened at a position corresponding to the valve portion 51 of the electromagnetic valve 50. Each of the terminals 42 is provided on the end face of the relay conductor 40 bent in a U-shape.
Are formed.

As shown in FIG. 2, the relay conductor 40 is covered from above each solenoid valve 50, and each terminal 42 of the relay conductor 40 and the connection terminal 54 on the coil portion 52 side are soldered, fused, welded, or the like. The terminals 44 on the end faces which are electrically connected and bent in a U-shape are inserted through the cover 21b of the solenoid valve cover 21 as shown in an enlarged manner in FIG. Electrically connected. Note that a potting 25 is interposed in the opening of the lid 21b through which the relay conductor 40 penetrates, and is waterproofed.

The relay conductor 4 disposed in the solenoid valve cover 21
Since the connection is made to the control board 23 via the “0” at a time, the connection structure is more compact than the method of connecting the coil section 52 and the control board 23 with a large number of leads. It should be noted that the relay conductor 40 is a flexible printed circuit in addition to the bus bar.
A circuit (FPC) or the like may be employed.

[0021]

Embodiment 2 Hereinafter, another embodiment of the present invention will be described.
The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. That is, in the present embodiment, as shown in an enlarged manner in FIG. 6, when one or more ridges 53 a are formed on the contact surface of the insulating layer 53 that contacts the skirt of the valve portion 51, the coil portion 52 becomes more compact. It can be positioned elastically.

[0022]

Third Embodiment In the first and second embodiments described above, the case where the coil portion 52 is positioned by pressing with the electromagnetic valve cover 21 has been described. However, as shown in FIG. Means for attaching the C-shaped or donut-shaped retaining ring 56 to restrict the coil portion 52 from coming out may be employed.

[0023]

Fourth Embodiment FIG. 8 may be modified such that the connection terminals 54 of the coil section 52 are extended to be directly electrically connected to the control board 23. In the present embodiment, an opening 21 d is formed in the lid 21 b of the solenoid valve cover 21 so that the connection terminal 54 can pass therethrough.
Can be connected to the control board 23, and the above-described relay conductor 40 can be omitted.

Further, when the connection terminal 54 is used in which a plate piece as shown in FIG. 9 is formed in a shape having a zigzag bent portion 54a, the connection terminal 54 is deformed in all directions (left and right, front and rear, up and down, etc.). It becomes possible. Therefore, the bent portion 54
a and the buffer function of the insulating layer 53 of FIG.
The mechanical stress acting on the connecting portion of No. 4 can be more effectively eliminated. Further, the connection terminal 54 may be formed by spirally bending a coil.

[0025]

[Fifth Embodiment] In the above, the embodiment applied to the integral type in which the electronic control unit 20 is integrated with the hydraulic unit 10 has been described. It is also possible to apply to a separate type to be arranged. In the case of the present embodiment, it is necessary to connect a separate harness to the connector provided on the electromagnetic valve cover 21 and to connect to the electronic control unit 20.

[0026]

As described above, the present invention has the following advantages. <A> The coil was covered with an insulating layer made of an elastic material, and the inner peripheral surface of the yoke was brought into contact with the valve body to allow relative movement between the coil and the yoke. This makes it possible to form a magnetic path between the yoke and the valve body while absorbing vibration by elastically positioning the coil portion and absorbing manufacturing tolerances of the coil portion and the electromagnetic valve cover. <B> A good electrical connection state can be maintained by eliminating mechanical stress and stress due to thermal deformation caused by manufacturing tolerances acting on the electrical connection portion of the coil connection terminal. <C> If the connection terminals protruding from the coil are integrally covered with an insulating layer, the connection terminals can be waterproofed. <D> It can be applied not only to the integral type in which the electronic control unit is integrated with the hydraulic unit, but also to the separate type in which the electronic control unit is arranged in the operator's cab.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of a partially cut solenoid valve.

FIG. 2 is an overall sectional view in which a part of a hydraulic pressure control device is cut away.

FIG. 3 is a sectional view of III-III in FIG. 2;

FIG. 4 is an overall view of a relay conductor.

FIG. 5 is an explanatory diagram of an electrical connection structure between a relay conductor and a control board.

FIG. 6 is a partially enlarged cross-sectional view of a solenoid valve according to another embodiment in which a protrusion is formed on an insulating layer.

FIG. 7 is an explanatory view of another embodiment in which a coil is positioned using a retaining ring.

FIG. 8 is an explanatory view of another embodiment in which a connection terminal of a coil is directly connected to a control board.

FIG. 9 is an explanatory view of another connection terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Hydraulic pressure unit 20 ... Electronic control unit 21 ... Electromagnetic valve cover 21a ... Electromagnetic valve cover sealing material 21b ... Electromagnetic valve cover lid 22 ... ECU cover 23 ... Control board 24 ... Electronic Components 30 Valve block 31 Housing hole 40 Relay conductors 42, 44 Terminal 50 Solenoid valve 51 Valve portion 51a of solenoid valve Sleeve of valve portion 51b Valve body of valve portion 51c Valve section 51 Valve section 52 Coil section of solenoid valve 52a Bobbin 52b Coil 52c Yoke 53 Insulating layer 54 Coil section connection terminal 55 Magnetic path

Claims (7)

[Claims] 1. A hydraulic pressure control device comprising: a liquid pressure unit having at least a plurality of electromagnetic valves, wherein one side of the hydraulic unit is covered with a cover, and the electromagnetic valves are electromagnetically operated by an electronic control unit having a control board built therein. The coil portion is formed by covering the outer circumference including both ends of the coil wound around the bobbin with an elastic insulating layer, and sandwiching the coil between the hydraulic unit and the cover with the insulating layer, A hydraulic pressure control device characterized by being elastically positioned in an axial direction and a circumferential direction. 2. The hydraulic pressure control device according to claim 1, wherein the connection terminals protruding from the coil are integrally covered with an insulating layer and subjected to a waterproof treatment. 3. A coil part according to claim 1, wherein a coil part is provided on a valve part constituting the solenoid valve, one end of the coil part is brought into contact with a valve body of the valve part via an insulating layer, and the other end of the coil part is provided. A hydraulic pressure control device characterized in that the end is positioned by abutting a part of a cover. 4. The valve according to claim 1, wherein a coil portion is provided on a valve portion constituting the solenoid valve, one of the coil portions is brought into contact with a valve body of the valve portion via an insulating layer, and the other of the coil portion is connected to the valve body. A hydraulic pressure control device characterized by being positioned in contact with a retaining ring mounted on a valve portion. 5. The hydraulic pressure control device according to claim 1, wherein a magnetic path is formed by bringing an inner peripheral surface of a yoke constituting the solenoid valve into contact with the valve body. 6. The coil according to claim 1, wherein the coil and the control board are electrically connected via a flexible relay conductor disposed in the cover. To control the hydraulic pressure. 7. The hydraulic pressure according to claim 1, wherein a flexible connection terminal is attached to the coil, and a free end of the connection terminal is directly connected to the control board. Control device.