JP2002042915A - Pressure control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure control device in which a ground terminal of a coil and a ground terminal of an electric motor and a metal block of a liquid pressure unit are connected to the ground with highly reliable electric connection, allowing the construction of a wiring assembly at a low cost without requiring expensive parts including a bus bar and requiring soldering to a control board for the bus bar. SOLUTION: A conductive bushing 41 is mounted between the control board 51 and the liquid pressure unit 11, the control board 51 is fixed to the conductive bushing 41 with a fixing member 61, a ground pattern 52 formed on the control board 51 is electrically connected to the conductive bushing 41 with the fixing member 61, a conductive member 62 is fixed to the liquid pressure unit 11, and the conductive bushing 41 is electrically connected to the liquid pressure unit 11 with the conductive member 62.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure control device, and more particularly, to an ABS (antilock brake system), a TCS (traction control system),
The present invention relates to an electronically controlled pressure control device such as an EBD (Electronic Brake Force Distribution).

[0002]

2. Description of the Related Art FIG.
There is one shown in FIG. FIG. 10 is a sectional view taken along the line AA in FIG.
It is sectional drawing.

In this apparatus, a ground terminal 632 of a plurality of coils 631 fixed to a hydraulic unit 611 to form an electromagnetic valve, a ground terminal (not shown) of an electric motor, and the like are provided on an upper portion of a lower resin case 621. Fixed control board 65
In addition to being connected to the ground pattern 652 formed in the first case 1, an upper resin case 620 covers them so as to hermetically and liquid-tightly shield them from the atmosphere. Similarly, the bus bar 641 connected to the control board 651 is connected to the metal block 6 of the hydraulic unit 611 via the embedded bush 642.
11a. The metal block 611a of the hydraulic unit 611 is connected to the control board 6 via a body ground.
51 and grounded to a vehicle body (not shown) via a connector. As a result, the ground terminal 632 of the coil 631, the ground terminal of the electric motor, and the like are grounded to the vehicle body (not shown) via the connector.

In this apparatus, the number of ground wires is reduced as much as possible by a ground pattern 652 and a bus bar 641 on a control board 651, and the structure of a wiring assembly is simplified to improve the assemblability.

[0005]

However, in this conventional apparatus, a punching die for manufacturing the bus bar 641 is required, which increases the cost. In addition, in the process of attaching the bus bar 641 to the resin case 621, a resin case is required. A complicated operation is required for holding and mounting the bus bar 641 with respect to the
There was a problem that it was necessary to solder 51.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. In order to ground the body of a ground terminal of a coil and a ground terminal of an electric motor via a metal block of a hydraulic unit, a bus bar or the like is used. No need for expensive components, no need to solder the bus bar to the control board,
It is an object of the present invention to configure a wiring assembly at low cost. A further object of the present invention is to provide a pressure control device in which a ground terminal of a coil, a ground terminal of an electric motor and a metal block of a hydraulic unit are grounded by a reliable and highly reliable electrical connection. Things.

[0007]

According to a first aspect of the present invention, there is provided a hydraulic unit having a pressure control valve and a hydraulic pump provided therein, wherein the hydraulic unit includes a pressure control valve and a hydraulic pump. A plurality of coils fixed to the unit and external to the pressure control valve to form an electromagnetic valve, a resin case fixed to the hydraulic unit and containing the coil, and fixed to the resin case And a control board for controlling the pressure by driving the electromagnetic valve, wherein a conductive bush is interposed between the control board and the hydraulic unit, and the conductive bush is When the control board is fixed by the fixing member, the ground pattern formed on the control board is electrically connected to the conductive bush by the fixing member, and the hydraulic unit is Conducting member is constituted a pressure control device, characterized in that said conductive bushing is fixed and is electrically connected to the hydraulic unit by said conductive member.

According to the first aspect of the present invention, the conductive bush and the conductive member are arranged between the control board and the hydraulic unit, that is, on the resin case or the hydraulic unit, thereby achieving a simple configuration. The ground pattern on the control board can be reliably grounded directly to the hydraulic unit, and the conductive bush can be used as a mounting base for the control board, so that space can be effectively used.

Next, as described in claim 2, the pressure control device is characterized in that the conductive bush and the conductive member are formed integrally.

According to the second aspect of the present invention, since the conductive bush and the conductive member are formed as an integral member,
The number of parts and the number of assembling steps can be reduced, and the cost can be reduced.

Next, as described in claim 3, a hydraulic unit in which a pressure control valve and a hydraulic pump are provided,
A plurality of coils fixed to the hydraulic unit and externally formed on the pressure control valve to form an electromagnetic valve; a resin case fixed to the hydraulic unit and accommodating the coil; and the resin case And a control board that controls the pressure by driving the solenoid valve, wherein the hydraulic unit has a boss portion penetrating the resin case, and the boss portion Preferably, the control board is fixed by a fixing member, and an earth pattern formed on the control board is electrically connected to the boss by the fixing member.

According to the third aspect of the present invention, the control board is fixed to the boss formed integrally with the hydraulic unit so as to penetrate the resin case by the fixing member. The ground pattern formed above and the hydraulic unit are reliably electrically connected, and the number of parts and the number of assembling steps are significantly reduced, so that the cost can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pressure control device according to the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of the present invention.

In FIG. 1, a motor 10 is mounted on the lower surface of a hydraulic unit 11, and a hydraulic pump, a pressure control valve, and a hydraulic passage (both of which are operated by receiving the driving force of the motor 10) are internally provided therein. (Not shown) and a plurality of solenoid valves 15 are provided.

On the side surface of the hydraulic unit 11, a port 12 for connecting a pipe from the master cylinder and a connection port 13 for a pipe connected to each wheel brake are formed.

Further, as shown in FIG. 2, on the upper surface of the hydraulic unit 11, a coil 31 is fixed by caulking or the like, and a lower resin case 21 is fixed by a screw 63 so as to cover the coil 31. I have. The solenoid valve 15 is constituted by the pressure control valve and the coil 31.

The lower resin case 21 and the upper resin case 20 are firmly connected by welding or the like.
The insides of the lower resin case 21 and the upper resin case 20 are air-tightly and liquid-tightly shielded from the atmosphere.

A connector 22 is formed integrally with the lower resin case 21 and a connector 2 is formed.
2 is a power supply,
It is electrically connected to various sensors (not shown).

As shown in FIG. 2, the lower resin case 21
The conductive bush 41 is inserted into the bottomed hole 21a provided above the bottom of the base plate, and the bottom surface of the conductive bush 41 contacts the bottomed bottom 21b.
1b and through hole 21 provided in lower resin case 21
The bolt 62 (conduction member) penetrates c. Bolt 6
The conductive bush 41 is fixed to the lower resin case 21 by screwing the 2 into the female screw 11b provided on the metal block 11a of the hydraulic unit 11. In this embodiment, the fixing bolt 63 is used to fix the metal block 11 a of the hydraulic unit 11 to the lower resin case 21, but the bolt 62 has the same function as the fixing bolt 63. Needless to say.

A control board 51 is fixed to the upper surface of the conductive bush 41 by bolts 61 (fixing members). The seat surface of the bolt 61 contacts the ground pattern 52 provided on the control board 51, and the bolt 61
Is screwed with a female screw 41 d provided on the conductive bush 41, thereby forming the ground pattern 5 on the control board 51.
2 is a bolt 61, a conductive bush 41 and a bolt 6
2, it is electrically connected to the metal block 11 a of the hydraulic unit 11.

Although not shown in FIG. 2, the upper resin case 20 is firmly connected to the lower resin case 21 by welding or the like so as to cover the control board 51. Upper resin case 20
Is air-tightly and liquid-tightly shielded from the atmosphere.

Although omitted in FIG. 2, the ground terminals of the plurality of coils 31 are connected to the control board 5 as shown in FIG.
1, the metal block 1 of the hydraulic unit 11 is soldered through the ground pattern 52, the bolt 61, the conductive bush 41 and the bolt 62.
1a will be electrically connected. Further, the power line of the motor 10 is connected to the metal block 11 of the hydraulic unit 11.
a and the lower resin case 21 while being insulated and connected to a power circuit pattern on the control board 51.

In this embodiment, the conductive bush 41 is made of metal, but may be made of a non-metallic conductor such as a conductive resin.

FIG. 3 shows a second embodiment of the present invention.

In the second embodiment, the conductive bush 141 is formed integrally with the lower resin case 21. That is, resin is injected around the conductive bush 141 fixed to the molding jig, and the conductive bush 141 and the lower resin case 21 are integrated.

A constricted portion 141b is provided below the conductive bush 141 to prevent the conductive bush 141 from falling off the lower resin case 21.
Therefore, the bolt 62 does not have a function of fixing the conductive bush 141 to the lower resin case 21, and the lower resin case 21 is connected to the metal block 11 a of the hydraulic unit 11.
Is used only for fixing bolt 63.

The components denoted by the same reference numerals as those of the first embodiment have the same functions and shapes as those of the first embodiment, and a description thereof will be omitted.

FIG. 4 shows a third embodiment of the present invention.

In the third embodiment, the conductive bush and the conductive member are integrated to reduce the number of parts and the number of assembling steps.

The conductive bush 241 includes an upper hexagonal column portion 241a, a central cylindrical portion 241b, and a lower bolt portion 241c.

The upper hexagonal column portion 241a has a female screw 2 screwed with a bolt 61 whose seating surface contacts the ground pattern 52.
41d is provided, and has a hexagonal column held by a screwing tool when the conductive bush 241 and the metal block 11a of the hydraulic unit 11 are screwed together.

The central cylindrical portion 241b is inserted into a bottomed hole 21a provided in the lower resin case 21 with a predetermined gap in the radial direction, and its bottom surface contacts the bottomed hole bottom portion 21b.

The lower bolt portion 241c passes through a through hole 21c provided in the lower resin case 21 and has a female screw 11 provided in the metal block 11a of the hydraulic unit 11.
Screw with b. Therefore, the bottom surface of the cylindrical portion 241b presses the lower resin case 21 and the lower resin case 21
Is fixed to the metal block 11a of the hydraulic unit 11. In order to fix the lower resin case 21 to the metal block 11a of the hydraulic unit 11, fixing bolts 63 are used.
Is used, but the bolt portion 241c is also fixed to the fixing bolt 6
Needless to say, it has the same function as the third.

In this embodiment, the hexagonal prism 241 is used.
The a, the cylindrical portion 241b, and the bolt portion 241c are made of the same kind of metal. However, the respective portions may be made of different metals as appropriate, and the conductive bush 241 may be integrated by pressing, welding, brazing, or the like. . Further, it may be manufactured integrally with a non-metallic conductor such as a conductive resin.
A part may be made of metal and may be integrally formed with a non-metallic conductor such as a conductive resin.

FIG. 5 shows a fourth embodiment of the present invention.

In the fourth embodiment, the conductive bush 341 includes an upper hexagonal column 341a and a central cylindrical portion 3a.
41b and a lower bolt portion 341c.

The upper hexagonal column portion 341a has a female screw 3 screwed with a bolt 61 whose seating surface contacts the ground pattern 52.
41d is provided, and has a hexagonal column held by a screwing tool when the conductive bush 341 and the metal block 11a of the hydraulic unit 11 are screwed.

The central cylindrical portion 341b is inserted into a through hole 21d provided in the lower resin case 21 with a predetermined gap in the radial direction, and its bottom surface contacts the metal block 11a of the hydraulic unit 11.

The lower bolt portion 341c is screwed with a female screw 11b provided on the metal block 11a of the hydraulic unit 11. Therefore, the conductive bush 341 connects the lower resin case 21 to the metal block 1 of the hydraulic unit 11.
FIG. 6 shows a fifth embodiment of the present invention in which a fixing bolt 63 is used for fixing the lower resin case 21 to the metal block 11a of the hydraulic unit 11 without having the function of fixing the lower resin case 1a to the metal block 11a. Is shown.

The fifth embodiment is different from the third embodiment in that the control board 51 is fixed by screwing the bolt 61 and the female screw 241d together with the nut 71 and the male screw 441e formed on the hexagonal column 441a. The third embodiment is changed to a fixing system by screwing, and has the same functions and shapes as those of the third embodiment in other respects.

FIG. 7 shows a sixth embodiment of the present invention.

Similarly to the fifth embodiment, the sixth embodiment is different from the fourth embodiment shown in FIG. 5 in that the control board 51 is fixed by screwing the bolt 61 and the female screw 341d together with a nut. The fixing method is changed to a fixing method by screwing a male screw 541e formed on the hexagonal column portion 541a and the hexagonal column 71, and the other has the same function and shape as the fourth embodiment.

FIG. 8 shows a seventh embodiment of the present invention.

In the seventh embodiment, the boss 11c is formed integrally with the metal block 11a of the hydraulic unit 11, and penetrates through the through hole 21d of the lower resin case 21 with a predetermined radial gap. A female screw 11d is formed on an upper portion of the boss 11c, and the female screw 11d is screwed with a bolt 61 having a seat surface in contact with the ground pattern 52. As a result, the ground pattern 52 and the metal block 11a of the hydraulic unit 11 are electrically connected as in the above embodiments.

Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above-described embodiments, but includes various embodiments according to the principles of the present invention.

In each of the above embodiments, the bolts 61 and the nuts 71 are used as the fixing members. However, the present invention is not limited thereto.
The control base may be fixed by press-fitting a pin in contact with the control board.

In each of the above embodiments, the bolt 62 is used as the conductive member when the conductive bush and the conductive member are separate members. However, the present invention is not limited to this. A pin abutting on the bottom hole bottom 21b may be pressed into the metal block 11a of the hydraulic unit 11.

[0049]

As described above, according to the present invention, an expensive component such as a bus bar is not required, and a soldering of the bus bar to a control board is not required. It is possible to provide a pressure control device in which the ground terminal of the coil, the ground terminal of the electric motor, and the metal block of the hydraulic unit are grounded by a reliable and reliable electrical connection. Becomes

[Brief description of the drawings]

FIG. 1 is a front projection view of a pressure control device according to the present invention.

FIG. 2 is a partial sectional view showing a first embodiment according to the present invention.

FIG. 3 is a partial cross-sectional view showing a second embodiment according to the present invention.

FIG. 4 is a partial sectional view showing a third embodiment according to the present invention.

FIG. 5 is a partial sectional view showing a fourth embodiment according to the present invention.

FIG. 6 is a partial sectional view showing a fifth embodiment according to the present invention.

FIG. 7 is a partial sectional view showing a sixth embodiment according to the present invention.

FIG. 8 is a partial sectional view showing a seventh embodiment according to the present invention.

FIG. 9 is a cross-sectional view of a wiring assembly part of a conventional pressure control device.

FIG. 10 is a sectional view taken along line AA of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pressure control device 11 Hydraulic unit 11c Boss part 15 Solenoid valve 20 Upper resin case 21 Lower resin case (resin case) 31 Coil 41 Conductive bush 141 Conductive bush 241 Conductive bush 341 Conductive bush 441 Conductivity Bush 541 Conductive bush 51 Control board 52 Ground pattern 62 Bolt (conductive member) 241c Conducting member 341c Conducting member 441c Conducting member 541c Conducting member

Claims (3)

[Claims] 1. A hydraulic unit in which a pressure control valve and a hydraulic pump are provided, and a plurality of coils fixed to the hydraulic unit and externally formed on the pressure control valve to form an electromagnetic valve. A pressure control device comprising: a resin case fixed to the hydraulic unit and accommodating the coil; and a control board fixed to the resin case and driving the electromagnetic valve to control pressure. A conductive bush is interposed between the control board and the hydraulic unit, and the ground pattern formed on the control board is formed while the control board is fixed to the conductive bush by a fixing member. A conductive member is electrically connected to the conductive bush by a fixing member, and a conductive member is fixed to the hydraulic unit, and the conductive bush is connected by the conductive member. A pressure control device, wherein the pressure control device is electrically connected to the hydraulic unit. 2. The pressure control device according to claim 1, wherein the conductive bush and the conductive member are formed integrally. 3. A hydraulic unit in which a pressure control valve and a hydraulic pump are provided, and a plurality of coils fixed to the hydraulic unit and externally formed on the pressure control valve to form an electromagnetic valve. A pressure control device comprising: a resin case fixed to the hydraulic unit and accommodating the coil; and a control board fixed to the resin case and driving the electromagnetic valve to control pressure. The hydraulic unit has a boss penetrating the resin case, and the control board is fixed to the boss by a fixing member, and the ground pattern formed on the control board is fixed to the fixing member. A pressure control device, wherein the pressure control device is electrically connected to the boss portion.