JPH1047521A - Electric liquid pressure type pressure control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric liquid pressure type pressure control device improving an assembly property (or disassembly property), heat radiation and air tightness, by eliminating a carrier member or a support member. SOLUTION: A first fixing means fixing an electronic control chamber constitution means independently constituting an electronic control chamber 501 receiving an electronic part in the inside and a solenoid chamber 502 constitution means capable of disassembling and a second fixing means fixing the solenoid chamber constitution means and a valve receiving unit capable of disassembling are provided. The electronic control chamber 501 constitution means comprises a substantially flat heat sink 8 and a cap-shaped first cover 20 mounted so as to come into contact with a peripheral edge part of the heat sink 8, the solenoid 502 constitution means comprises an upper part of the valve receiving unit 503 and a cap-shaped second cover 3 mounted in a peripheral edge part of the upper part, and, in a contact part of the heat sink 8 and the first cover 20, a first seal member is arranged, and in a contact part of valve receiving unit 503 and the second cover 3, a second seal member is arranged, and, in a contact part of the heat sink 8 and the second cover 3, a third seal member is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electro-hydraulic pressure control device.

[0002]

2. Description of the Related Art An electro-hydraulic pressure control device, in particular, a brake pressure control device such as an antilock control device and a traction slip control device is disclosed in Japanese Patent Application Laid-Open No. 3-501109.
(Japanese Patent Application No. 1-503566) (hereinafter referred to as Conventional Example 1) and Japanese Patent Application No. 5-505446 (Japanese Patent Application No. 3-5).
18706) (referred to as Conventional Example 2).

The electro-hydraulic pressure control devices disclosed in the prior art examples 1 and 2 (hereinafter, sometimes simply referred to as pressure control devices) have a cover or a part of the cover which is an electric control unit or a part of an electronic control unit. It is of the type formed as

The foregoing will be described below with reference to FIGS. 8 and 9. FIG. 8 is a cross-sectional view showing a main part of the pressure control device of Conventional Example 1, and FIG. 9 is a cross-sectional view showing a main part of the pressure control device of Conventional Example 2. As shown in FIGS. 8 and 9, in the first and second conventional examples, a part of the cover 106 is
2 (conventional example 1) or an electronic control unit 102 (conventional example 2) including PCBs (printed circuit boards) 112 and 114.

[0005] The electronic control device 102 of the conventional example 1 has a cover 1
06, and the wiring from the coil in the solenoid 108 is connected to the carrier member 11 in which the conductor is provided.
Electronic control unit 102 arranged laterally, guided by zero
Leading to.

In the second conventional example, the electronic control unit 102 is not disposed sideways but is taken inside the cover 106.
In the case of the conventional example 2, the carrier member 110 in the case of the conventional example 1 is unnecessary, and the coils in the solenoid 108 are individually soldered directly to the lower PCB 116.
For this reason, in Conventional Example 2, a support member 112 is added.

[0007]

In the prior arts 1 and 2, since the carrier member 110 or the support member 112 is provided, the structure becomes complicated, and the assemblability is poor. Further, no consideration has been given to heat radiation and airtightness.

Accordingly, a first object of the present invention is to provide a pressure control device which can be easily assembled (and disassembled) without a carrier member or a support member.

A second object of the present invention is to provide a pressure control device having good heat dissipation and good airtightness (particularly waterproofness).

[0010]

In order to achieve the above-mentioned first object of the present invention, the present invention provides an electronic control room forming means for independently forming an electronic control room for accommodating electronic components therein. A solenoid chamber for accommodating a solenoid therein, the solenoid chamber constituting means independent of the electronic control chamber, and a valve housing, and the electronic control chamber constituting means and the solenoid chamber constituting means are disassembled and fixed. First fixing means for performing
An electro-hydraulic pressure control device is provided, comprising the solenoid chamber forming means and a second fixing means for fixing the valve housing so as to be disassembled.

According to another aspect of the present invention, there is provided an electro-hydraulic pressure control device of the type described above, wherein the electronic control chamber forming means includes a substantially flat heat sink and a heat sink for the heat sink. A lid-shaped first cover mounted so as to be in contact with a peripheral portion, wherein the solenoid chamber forming means includes an upper portion of the valve housing, and a lid-shaped second cover mounted on the peripheral portion of the upper portion. A first seal member is disposed at a contact portion between the heat sink and the first cover, and a second seal member is disposed at a contact portion between the valve housing and the second cover. The electro-hydraulic pressure control device is characterized in that a second seal member is disposed at a contact portion between the heat sink and the second cover.

[0012]

Next, embodiments of the present invention will be described. FIG. 1 is a front view showing a basic configuration of a pressure control device according to an embodiment of the present invention, FIG. 2 is an exploded front view for explaining assembly of the pressure control device, and FIGS. 3 is a plan view, FIG. 4 is a right side view, FIG. 5 is a left side view, and FIG. 6 is a front view of the pressure control device of the present invention. FIG. 7 is a longitudinal sectional view.

First, with reference to FIGS. 1 to 7, each member constituting the pressure control device of the present invention will be described in accordance with the reference numerals indicating the members. Reference numeral 501 denotes an electronic control room, 502 denotes a solenoid chamber, and 503 denotes a valve housing. 1 is a coil in a solenoid, 3 is a cover member, 4 is an elastic support,
5 is a valve housing body, 8 is a heat sink (radiator plate), 8 '
Is an enlarged portion of a heat sink, 9 is a printed circuit board, 1
Reference numeral 0 denotes a valve dome (in which the valve is housed and moved in the valve dome), and reference numeral 11 denotes a coil lead wire.

Reference numeral 20 denotes an electronic control unit cover, reference numeral 21 denotes a board holding rib, reference numeral 31 denotes a connector housing portion, reference numeral 81 denotes one of a double-sided tape, an adhesive and heat conductive grease, or a combination thereof (hereinafter, double-sided tape, etc.). , 82 denotes a sealing material, 91 denotes an electronic component, 92 denotes a connector pin, 93 denotes a coil connection pin, and 94 denotes a coil connection portion.

Reference numeral 200 denotes an electronic control unit connecting bolt, 2
01 is a coil part tightening bolt, 202 is the first electronic control unit.
Reference numeral 203 denotes a cover tightening bolt, reference numeral 203 denotes a connector cover tightening bolt of the first cover, reference numeral 300 denotes a coil portion sealing material, reference numeral 301 denotes a sealing material between the electronic control unit and the coil unit, and reference numeral 302 denotes an electronic control unit sealing material.

Next, referring to FIG. 1 and FIG. 2, the pressure control device of the present invention comprises an electronic control chamber 501, a solenoid chamber 50,
2. It comprises a valve housing 503. These are formed independently of each other, and have individual airtightness, and can be easily assembled and disassembled with each other, as described later. As shown in FIG. 2, the electronic control room 501 includes an electronic control unit cover 20 and a heat sink 8, and a bolt 20
The two are assembled together to form an electronic control room. The solenoid chamber 502 includes the cover 3 and the cover 3
And the heat sink 8 are assembled together by bolts 200. Further, the cover 3 is assembled with the valve housing 503, thereby forming a solenoid chamber 502.

Next, reference is made to FIGS. The printed circuit board 9 is bonded to a heat sink 8 or a heat sink 8 ′ (which is slightly larger than the heat sink 8 and extends outward as indicated by the dotted line) with a double-sided tape 81 or the like. Then, the electronic control room 501 is sealed by the cover 20 to form the electronic control room 501 as described above. Seal material 3 made of O-ring etc.
02 is disposed between the heat sink 8 or 8 'and the cover 20, and prevents water from entering from outside. Cover 20
A plurality of ribs 21 are formed on the inside so as to stand upright with respect to the cover, and these ribs 21 work to press the printed circuit board 9.

The heat sink 8 absorbs heat generated from the electronic components 91 mounted on the printed circuit board 9 and discharges the heat to the outside. When a large amount of heat is generated from the electronic component 91, a heat sink 8 ', which is one size larger than the heat sink 8, is used.

The pins 93 are soldered to the substrate and sealed with a sealing material 82. The pin 93 is connected to the lead wires 11 and 94 of the coil 1 in the solenoid chamber, and conducts to the coil 1. This connection is most preferably soldered, but a connector or caulking may be used. Pin 92
Is a connector pin that leads from the printed circuit board 9 to the outside. These pins 92 are soldered to the printed circuit board 9,
Further, it is used to be completely sealed by the sealing material 82 and connected to the outside.

With the above configuration, the electronic control room 501 is
A sealing material 302 such as an O-ring, a sealing material 82 made of a sealing material for the pins 93, 93, a double-sided tape 81 or the like
Then, the pins are completely sealed by solder for attaching the pins to the printed circuit board. This maintains water tightness and air tightness. However, in order to maintain water tightness (waterproofness) and to have air permeability (to cope with the difference between the internal pressure and the external pressure), it does not allow water to pass through but air A ventilation hole through which the air may pass may be separately provided.

Next, a support 4 for elastically holding the coil 1 and a cover 3 for accommodating them are provided. A seal member 300 made of an O-ring or the like is provided between the cover 3 and the valve housing body 5. The cover 3 is fastened to the heat sink 8 or 8 ′ by bolts 200 and simultaneously to the valve housing body 5 by bolts 201. Thereby, the solenoid chamber 5
02 is formed, and this solenoid chamber is provided with a sealing material 300.
And an O-ring or the like for sealing. Note that, similarly to the electronic control room, a vent similar to that described above may be provided for responding to changes in atmospheric pressure while maintaining watertightness.

Next, the configuration of the pressure control device of the present invention will be compared with the configuration of a conventional example with reference to the drawings.

(1) Heat sink: FIG. 10 is a cross-sectional view for explaining the arrangement of the heat sink of the second conventional example. In FIG. 10, the heat sink 8 has no portion exposed to the outside and is confined in the housing 601. Therefore, this heat sink has a small heat radiation effect.

FIG. 11 is a sectional view for explaining the arrangement of the heat sink of the present invention. The periphery of the heat sink 8 is exposed to the outside. Therefore, the heat sink 8 can have a large shape, and has a large heat radiation effect. As a result, the durability and reliability of the electronic component are improved.

(2) Lead wire: FIGS. 12 and 13 are cross-sectional views for explaining the lead wire of the conventional example 2, and FIG.
FIG. 3 is a cross-sectional view for explaining corresponding portions of the present invention. As shown in FIG. 12 and FIG.
A lead wire 602 connects between the printed circuit board 114 and the connector pins 93 and the printed circuit board 116.
On the other hand, in the present invention, as shown in FIG. 14, the pins 93 are directly connected to the printed circuit board 9 by soldering, so that no lead wire is required.

(3) Carrier member: FIG. 15 is a cross-sectional view for explaining the carrier member of the conventional example 1, and FIG. 16 is a cross-sectional view for explaining the corresponding portions of the present invention.
As shown in FIG. 15, a carrier member 110 formed by bundling conductive wires is used to connect between the electronic control device 102 and the coil of the solenoid 108. Since this carrier member is made by casting a copper wire or the like with plastic or the like, it is not easy to manufacture and is expensive. On the other hand, in the present invention, since the printed circuit board 9 of the electronic control device and the coil 1 of the solenoid are connected by the pins 93, a carrier member is unnecessary.

(4) Sealability: FIG. 17 is a cross-sectional view for explaining the sealability of Conventional Example 2, and FIG. 18 is a cross-sectional view for explaining the sealability of the present invention. As shown in FIG. 17, the cover 106 includes upper and lower resin members 106a and 106b.
Is completely engaged with both claws or the like, and furthermore, a sealing material (not shown) is poured in to completely harden and cannot be disassembled. Therefore, the electronic control unit including the printed circuit board cannot be easily accessed, and if the electronic control unit breaks down,
Repairs cannot be made.

Also, since the solenoid chamber surrounding the solenoid 108 and the electronic control chamber surrounding the electronic control unit seal the plastic hole through the lead wire 602 only with the sealing material 605, the sealing performance is not good.

On the other hand, as shown in FIG.
The space between the cover 20 and the heat sink 8 is completely sealed by a sealing member 302 such as an O-ring.
And the electronic control chamber surrounding the electronic components 91 and the solenoid chamber surrounding the solenoid are sealed three times by a sealing member 82 made of a sealing material, a double-sided tape 81 and solder, so that the sealing performance is improved. Extremely high. Furthermore, the cover can be removed simply by removing the bolt 202, and if the electronic control device fails, it can be easily repaired.

Note that the upper and lower resin members 106a and 1
More specifically, the upper resin member 106a and the lower resin member 106b are generally a plastic case or a sheet metal case having a stepped end, and are joined by abutting the stepped ends to each other. Alignment is difficult because of normal distortion, warpage, and twisting. For this reason, in practice, a large number of claws (not shown) are formed, meshed up and down, and the adhesive is poured between them to solidify completely. Therefore, once hardened,
It cannot be disassembled.

On the other hand, in the present invention, since the heat sink (usually made of an aluminum plate) corresponds to the lower resin member, the accuracy of flatness is improved, so that the cover corresponding to the upper resin member is not provided. Even if it is slightly distorted, a sealing member such as an O-ring is arranged between them and tightened with bolts, so that a complete seal can be obtained. As described above, the sealing (waterproofing) effect is extremely high while having a simple configuration. Also,
The structure can be easily disassembled (can be disassembled by removing the bolts), so that it can be disassembled any number of times when diagnosing or repairing a failure.

In the present invention, it is possible to obtain a highly-sealing seal, but in some cases, it is better to have some air permeability, and it is intended to obtain complete waterproofness. Vent holes provided with a waterproof cloth (for example, "Gore-Tex" that allows air to pass through but not water) may be provided.

(5) Others: Although the present invention has a waterproof structure and high sealing performance, the heat sink is large and its peripheral edge is exposed to the outside, so that the heat radiation effect is high. In the present invention, the heat sink can also serve as the electromagnetic shielding material. When the heat sink is made of an aluminum plate, there is an electromagnetic shielding effect, and the magnetic flux leaking from the coil can be shielded from the electronic control unit. Since the connector pins for connecting the electronic circuit and the external circuit are on the printed circuit board, there is no need to connect with the connector,
It is easy to test the board alone before assembling it in a case. That is, since the test can be performed on the substrate alone without assembling with the temporary connection lead wire or the lower case, productivity is good when mass-producing. Connection and separation between the coil and the printed circuit board are easy.
In the present invention, the lower end of the pin attached to the printed circuit board and protruding downward is simply connected to the coil by a lead wire, so that connection and separation can be easily performed without disturbing other components. be able to. It is preferable to use, for example, a connector called “Giboshi” for the connection because the connection can be easily made. In the conventional example, since the lead wire is sealed to the lower lid, there is no other way than to remove the solder on the printed circuit board. However, when the solder is melted by the heat sink bonded to the printed circuit board, heat is taken away,
It is difficult to remove the leads.

[0034]

As described above, according to the present invention,
A pressure control device with good assemblability (and disassembly) can be obtained without a carrier member or a support member.

In addition, a pressure control device with good heat dissipation despite good airtightness (particularly waterproofness) can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing a basic configuration of a pressure control device according to an embodiment of the present invention.

FIG. 2 is an exploded front view for explaining assembly of the pressure control device.

FIG. 3 is a plan view of the pressure control device of the present invention.

FIG. 4 is a right side view of the pressure control device of the present invention.

FIG. 5 is a left side view of the pressure control device of the present invention.

FIG. 6 is a front view of the pressure control device of the present invention.

FIG. 7 is a longitudinal sectional view showing a detailed configuration of the pressure control device of the present invention.

FIG. 8 is a sectional view of a pressure control device of a conventional example (conventional example 1).

FIG. 9 is a sectional view of a pressure control device of a conventional example (conventional example 2).

FIG. 10 is a cross-sectional view for explaining an arrangement of a heat sink according to Conventional Example 2.

FIG. 11 is a cross-sectional view for explaining the arrangement of the heat sink of the present invention.

FIG. 12 is a cross-sectional view for explaining a lead wire of Conventional Example 2.

FIG. 13 is a cross-sectional view for explaining a lead wire of Conventional Example 2.

FIG. 14 is a cross-sectional view for explaining a portion of the present invention corresponding to a lead wire of a conventional example.

FIG. 15 is a cross-sectional view for explaining a carrier member of Conventional Example 1.

FIG. 16 is a cross-sectional view for explaining portions of the present invention corresponding to a carrier member of a conventional example.

FIG. 17 is a cross-sectional view for explaining the sealing performance of Conventional Example 2.

FIG. 18 is a cross-sectional view for explaining the sealing performance of the present invention.

[Explanation of symbols]

 Reference Signs List 501 Electronic control room 502 Solenoid room 503 Valve housing 1 Coil in solenoid 3 Cover member 4 Elastic support 5 Valve housing main body 8 Heat sink (radiator plate) 8 'Enlarged portion of heat sink 9 Printed circuit board 10 Valve dome 11 Coil extraction Line 20 Electronic control device cover 21 Board holding rib 31 Connector housing portion 81 Double-sided tape etc. 82 Seal material 91 Electronic component 92 Connector pin 93 Coil terminal 94 Coil connection portion 200 Electronic control portion connecting bolt 201 Coil portion tightening bolt 202 Electronic control device First cover fastening bolt 203 First cover connector fastening bolt 300 Coil sealing material 301 Sealing material between electronic control unit and coil unit 302 Electronic control unit sealing material

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[Procedure amendment]

[Submission date] September 30, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

The foregoing will be described below with reference to FIGS. 8 and 9. FIG. 8 is a cross-sectional view showing a main part of the pressure control device of Conventional Example 1, and FIG. 9 is a cross-sectional view showing a main part of the pressure control device of Conventional Example 2. As shown in FIGS. 8 and 9, in the first and second conventional examples, a part of the cover 106 is
2 (conventional example 1) or an electronic control unit 102 (conventional example 2) including PCBs (printed circuit boards) 116 and 114.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

According to another aspect of the present invention, there is provided an electro-hydraulic pressure control device of the type described above, wherein the electronic control chamber forming means includes a substantially flat heat sink and a heat sink for the heat sink. A lid-shaped first cover mounted so as to be in contact with a peripheral portion, wherein the solenoid chamber forming means includes an upper portion of the valve housing, and a lid-shaped second cover mounted on the peripheral portion of the upper portion. A first seal member is disposed at a contact portion between the heat sink and the first cover, and a second seal member is disposed at a contact portion between the valve housing and the second cover. An electro-hydraulic pressure control device is provided, wherein a third seal member is disposed at a contact portion between the heat sink and the second cover.

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

FIG. 5

[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 10

Claims (8)

[Claims] 1. An electronic control room forming means for independently forming an electronic control room for housing electronic components therein, and a solenoid chamber forming means for forming a solenoid chamber for housing a solenoid therein independently of the electronic control room. And a valve housing,
A first fixing means for removably fixing the electronic control chamber forming means and the solenoid chamber forming means, and a second fixing means for removably fixing the solenoid chamber forming means and the valve housing. Electro-hydraulic pressure control device. 2. An electro-hydraulic pressure control device according to claim 1, wherein said first fixing means and said second fixing means are detachable bolts. 3. An electro-hydraulic pressure control device according to claim 1, wherein said electronic control chamber forming means includes a substantially flat heat sink and a lid-shaped first member mounted so as to abut on a peripheral portion of said heat sink. An electro-hydraulic pressure control device, comprising: a cover; and the solenoid chamber forming means includes: an upper portion of the valve housing; and a lid-shaped second cover mounted on a peripheral portion of the upper portion. 4. The electro-hydraulic pressure control device according to claim 3, wherein a first seal member is disposed at a contact portion between the heat sink and the first cover, and the first seal member is disposed between the heat sink and the second cover. An electro-hydraulic pressure control device, wherein a second seal member is disposed at a contact portion, and a third seal member is disposed at a contact portion between the heat sink and the second cover. 5. The electro-hydraulic pressure control device according to claim 4, wherein the first seal member, the second seal member, and the third seal member are O-rings or waterproof gaskets. Pressure type pressure control device. 6. The electro-hydraulic pressure control device according to claim 1, wherein the heat sink is any one of an electrically insulating adhesive, a double-sided tape, and a heat conductive grease on a printed circuit board on which electronic components are mounted. An electro-hydraulic pressure control device characterized by being bonded by a combination thereof. 7. The electro-hydraulic pressure control device according to claim 6, wherein a downwardly projecting pin is soldered to the printed circuit board, and a sealing material is applied between the pin and a heat sink. An electro-hydraulic pressure control device having a lower end connectable to a coil in a solenoid or an external electric circuit by a connector, soldering or caulking. 8. The electro-hydraulic pressure control device according to claim 1, wherein at least one of the electronic control chamber or the solenoid chamber is provided with a permeable but waterproof sealing material. An electro-hydraulic pressure control device, which is provided.