JP6422071B2 - Electronic control unit and vehicle brake hydraulic pressure control device - Google Patents

Description

  The present invention relates to an electronic control unit and a vehicle brake hydraulic pressure control device using the electronic control unit.

An electronic control unit of a vehicular brake hydraulic device includes an electronic board that controls an electromagnetic valve, a pressure sensor, a motor, and the like mounted on a base, and a housing that houses the electronic board.
The housing is a box that is fixed to one surface of the base body, and stores an electronic board and electrical components that protrude from the one surface of the base body.

As a conventional electronic control unit, a mounting portion on which an electronic substrate is placed and a fixing portion to which the electronic substrate is fixed are formed in a housing, and a screw hole is formed on an end surface of the fixing portion. (For example, refer to Patent Document 1).
In this configuration, the electronic substrate is fixed by bringing the electronic board into contact with the end surface of the mounting portion and the end surface of the fixing portion, and screwing the screw member penetrated through the mounting hole of the electronic substrate into the screw hole of the fixing portion. It is fixed to the part.

JP 2011-63060 A

  As described above, when the electronic substrate is fixed to the fixing portion with the screw member, when the fastening force of the screw member to the fixing portion is increased and the electronic substrate is strongly pressed against the fixing portion, the stress is concentrated on a part of the electronic substrate. However, slight warping occurs in the electronic substrate. And if a clearance gap arises between a mounting part and an electronic substrate because an electronic substrate warps, there exists a problem that a vibration will arise in an electronic substrate at the time of driving | running | working of a vehicle.

  It is an object of the present invention to provide an electronic control unit and a vehicle brake hydraulic pressure control device that can solve the above-described problems and can increase the stability of the electronic board with respect to the housing.

In order to solve the above problems, the present invention is an electronic control unit including an electronic board and a housing in which the electronic board is accommodated. The housing is formed with a placement portion on which the electronic substrate is placed and a fixing portion to which the electronic substrate is fixed by a connecting means. The contact portion that is the front end surface of the mounting portion and the contact portion that is the front end surface of the fixing portion are in contact with the back surface of the electronic board, and the contact portion of the mounting portion is fixed to the fixed portion. It is arrange | positioned rather than the contact part of the part.

In this configuration, the contact portion of the mounting portion contacts the electronic substrate at a position closer to the electronic substrate than the contact portion of the fixed portion. Therefore, when the electronic substrate is fixed to the fixed portion, the electronic substrate has a slight amount. Even if warpage occurs, it is possible to prevent a gap from being generated between the contact portion of the placement portion and the electronic substrate.
In addition, since the electronic substrate can be reliably supported by the mounting portion and the fixing portion, the stress generated in the electronic substrate can be dispersed.

  In the electronic control unit described above, a protrusion may be formed on the mounting portion, and a screw hole may be formed on the fixing portion. Preferably, the protrusion is inserted into an engagement hole formed in the electronic board, and a screw member which is the connecting means penetrating the electronic board is screwed into the screw hole. In this configuration, the stability of the electronic substrate with respect to the housing can be enhanced.

  In the electronic control unit described above, the housing is provided with at least two mounting portions, at least two fixing portions, and a straight line connecting the two mounting portions and the two fixing portions are connected. It is desirable to arrange the mounting portion and the fixing portion so that the straight line intersects.

  When the two fixing portions are fixed to the electronic substrate, the electronic substrate is warped at both ends of a straight line connecting both the mounting portions. Therefore, when the mounting portion and the fixed portion are arranged so that the straight line connecting the two mounting portions and the straight line connecting the two fixed portions intersect, the two mounting portions are arranged on both sides of the straight line connecting the two fixed portions. Will be placed respectively. As described above, since the placement portion is arranged in accordance with the portion where the warpage occurs in the electronic substrate, the electronic substrate can be effectively supported by the placement portion.

  In the electronic control unit described above, it is desirable that the electronic substrate is securely supported by the placement portion and the fixing portion by the elastic contact of the electronic substrate with the placement portion.

  The electronic control unit of the present invention can be used in a vehicle brake hydraulic pressure control device. The vehicle brake fluid pressure control device includes a base body on which a brake fluid passage is formed and the electronic control unit, and the electronic control unit is attached to one surface of the base body. The electronic board controls electrical components mounted on the base.

  In the electronic control unit and the vehicle brake hydraulic pressure control device of the present invention, even when the electronic substrate is fixed to the fixed portion, even if a slight warp occurs in the electronic substrate, there is a gap between the mounting portion and the electronic substrate. This can be prevented and vibration of the electronic substrate can be prevented. In addition, the stress generated in the electronic substrate when the electronic substrate is fixed to the fixing portion can be dispersed.

It is the disassembled perspective view which showed the brake fluid pressure control apparatus for vehicles of this embodiment. It is a sectional side view showing the brake fluid pressure control device for vehicles of this embodiment. It is the perspective view which showed the state before accommodating an electronic board | substrate in a housing. It is the figure which looked at the inside of a housing from the front side. It is the perspective view which showed the state which accommodated the electronic substrate in the housing. It is AA sectional drawing of FIG.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the present embodiment, an electronic control unit used in a vehicle brake hydraulic pressure control device will be described.

The vehicle brake fluid pressure control device U controls brake fluid pressure acting on the wheel cylinder, and includes a base body 100 and an electronic control unit 10 having an electronic board 20 as shown in FIG. Yes.
The base body 100 is formed with a brake fluid path that connects the master cylinder and the wheel cylinder. The base body 100 is assembled with electric parts such as the electromagnetic valve V and the pressure sensor S, electric parts such as the motor 200, plunger pump P, and the like.
In the vehicle brake fluid pressure control device U, the electronic substrate 20 operates the electromagnetic valve V and the motor 200 based on the behavior of the vehicle, thereby varying the brake fluid pressure in the brake fluid passage in the base body 100.

The base body 100 is a metal part formed in a substantially rectangular parallelepiped. Of each surface of the base body 100, a front surface 101 is provided with a mounting hole 151 in which electric parts such as the electromagnetic valve V and the pressure sensor S are mounted.
On the upper surface 103 of the base body 100, an outlet port 152 to which a brake pipe reaching the wheel cylinder is connected is formed.
On the lower surface of the base body 100, a reservoir hole 153 and the like for assembling a reservoir component R constituting the reservoir are formed.
A side surface 105 of the base body 100 is formed with a pump hole 155 to which the plunger pump P is mounted.
The holes provided in the base body 100 communicate with each other directly or through a brake fluid passage formed in the base body 100.

The motor 200 is a power source of the plunger pump P. As shown in FIG. 2, the motor 200 is fixed to the back surface 102 of the base body 100, and the output shaft 210 is inserted into the motor mounting hole 154 of the base body 100.
A motor bus bar 220 for supplying electric power to the motor 200 is inserted into the terminal hole 140 of the base body 100 and is connected to an electronic circuit of the electronic substrate 20 via a terminal T provided in the housing 40. ing.

  As shown in FIG. 1, the electronic control unit 10 includes an electronic board 20 that controls the operation of the electromagnetic valve V and the motor 200, and a housing 40 that houses the electronic board 20.

As shown in FIG. 2, the housing 40 is integrally fixed to the front surface 101 of the base body 100 while covering electrical components such as the electromagnetic valve V and the pressure sensor S protruding from the front surface 101 of the base body 100. It is a box made of synthetic resin.
The housing 40 has an open surface on the opposite side to the base 100 side (the right side surface in FIG. 2) and a surface on the base 100 side (the left side surface in FIG. 2).

The housing 40 has a substantially rectangular partition portion 44 to which the electronic substrate 20 is attached in a hierarchical state, and peripheral wall portions 41 a and 42 a that are vertically raised from the peripheral portion of the partition portion 44 to the front side and the back side and surround the partition portion 44. And.
The inside of the housing 40 is partitioned into a front side and a back side by a partitioning portion 44, whereby a first storage chamber 41 and a second storage chamber 42 are formed.

Formed on the back side of the internal space of the housing 40 is a first storage chamber 41 that stores electrical components such as the electromagnetic valve V, the electromagnetic coil V1, and the pressure sensor S.
A second storage chamber 42 that stores the electronic substrate 20 is formed on the front side of the internal space of the housing 40.
The opening on the front side of the housing 40 is sealed with a cover 50 made of synthetic resin.

The peripheral wall portions 41a and 42a are composed of a first peripheral wall portion 41a that forms the first storage chamber 41 and a second peripheral wall portion 42a that forms the second storage chamber 42, and the first peripheral wall portion 41a and the second peripheral wall portion 41a. The outer peripheral shape of the peripheral wall part 42a is substantially rectangular (see FIG. 4).
The 2nd surrounding wall part 42a is arrange | positioned at the front side of the 1st surrounding wall part 41a. The first peripheral wall portion 41 a is a portion that surrounds an electrical component protruding from the front-side surface 101 of the base body 100, and the second peripheral wall portion 42 a is a portion that surrounds the electronic substrate 20.

The first peripheral wall portion 41a is provided with a flange 41b that comes into contact with the outer peripheral edge of the front surface 101 of the base body 100, and a mounting hole 41c is formed at an appropriate position of the flange 41b (see FIG. 4).
An endless seal member 41d is mounted on the end surface of the flange 41b on the substrate 100 side along the inner periphery of the flange 41b. The sealing member 41 d is a member that is in close contact with the front surface 101 of the base body 100 and seals between the base body 100 and the housing 40.

The partition portion 44 is a plate-like portion facing the front surface 101 of the base body 100 with a space therebetween. A first storage chamber 41 is formed on the back side of the partition portion 44, and a second storage chamber 42 is formed on the front side of the partition portion 44.
The partition portion 44 is formed with a terminal attachment portion 44d through which the terminal T passes. One end side of the terminal T protrudes into the first storage chamber 41, and the other end side protrudes into the second storage chamber 42.

  On the back side of the housing 40, a connector connecting portion 43 (see FIG. 3) is provided. The connector connecting portion is a portion to which a connector provided at the end of the external wiring cable is connected.

The electronic substrate 20 is obtained by attaching an electronic component such as a semiconductor chip to a rectangular substrate body 21 on which an electronic circuit (not shown) is printed (see FIG. 5).
The electronic board 20 is configured to control the operation of the electromagnetic valve V and the motor 200 based on information obtained from various sensors such as the pressure sensor S, a program stored in advance, and the like.

  In the second peripheral wall portion 42a, a terminal aggregation portion 45 in which a plurality of bus bars 45a are arranged in parallel is formed inside the upper and lower sides and the right side of FIG. Each bus bar 45a is electrically connected to the electromagnetic coil V1, the pressure sensor S, the motor 200, and a connector connecting portion (not shown).

  The electronic circuit of the electronic substrate 20 and the bus bar 45a are electrically connected by bonding wires (not shown). Thereby, as shown in FIG. 2, the electronic circuit of the electronic board | substrate 20, and the electromagnetic coil V1, the pressure sensor S, the motor 200, and the connector connection part 43 (refer FIG. 3) are electrically connected.

As shown in FIG. 4, two first placement portions 81, 81, three second placement portions 82, 82, 82 and two fixing portions 83, 83 are provided on the front surface 44 a of the partition portion 44. Is formed.
The first placement portion 81 and the second placement portion 82 are portions that only contact the back surface of the electronic substrate 20, and the fixing portion 83 is a portion that contacts and is fixed to the back surface of the electronic substrate 20.

The two first mounting portions 81 and 81 project from the upper left corner and the lower right corner of the partition 44 shown in FIG.
As shown in FIG. 6, the front-side end surface 81 a of the first placement portion 81 is a plane parallel to the front-side surface 44 a of the partition portion 44. A projecting portion 81 b projects from the center portion of the end surface 81 a of the first placement portion 81.
The end surface 81 a of the first placement portion 81 is a contact portion that contacts the back surface of the electronic substrate 20, and the protruding portion 81 b is inserted into the engagement hole 22 formed in the electronic substrate 20.

The three second placement portions 82, 82, 82 are arranged on the upper and lower sides and the right side of the partition portion 44 in FIG. 4.
An end surface 82 a on the front side of the second placement portion 82 is a belt-like plane extending along each side of the partition portion 44. As shown in FIG. 6, the end surface 82 a of the second placement portion 82 is a contact portion that is parallel to the front surface 44 a of the partition portion 44 and contacts the back surface of the electronic substrate 20.

The two fixing parts 83 and 83 project from the upper right corner and the lower left corner of the partition 44 in FIG.
As shown in FIG. 6, the front-side end surface 83 a of the fixing portion 83 is a plane parallel to the front-side surface 44 a of the partition portion 44 and is a contact portion that contacts the back surface of the electronic substrate 20. In addition, a screw hole 83b is formed in the center of the end face 83a of the fixing portion 83.

  In the present embodiment, as shown in FIG. 4, two first placement portions 81, 81 and two fixing portions 83, 83 are arranged at the four corners of the partition portion 44. And the straight line L1 which connects both the 1st mounting parts 81 and 81 and the straight line L2 which connects both the fixing parts 83 and 83 cross | intersect. That is, the first placement portion 81 and the fixing portion 83 are arranged on the diagonal line of the partition portion 44.

As shown in FIG. 5, when the electronic substrate 20 is accommodated in the housing 40, the back surface of the electronic substrate 20 is attached to the end surfaces 81 a, 82 a, 83 a of the first placement portion 81, the second placement portion 82, and the fixing portion 83. Place.
At this time, the protrusion 81b of the first placement portion 81 is inserted into the engagement hole 22 of the electronic substrate 20 (see FIG. 6). Thereby, the electronic substrate 20 is positioned in the housing 40 by the two first placement portions 81 and 81.

  Further, as shown in FIG. 6, the shaft portion of the screw member 25 (“connecting means” in the claims) is passed through the mounting hole 23 formed in the electronic substrate 20 from the front side, and the shaft portion of the screw member 25 is Screwed into the screw hole 83b of the fixed portion 83. Then, by pressing the head of the screw member 25 against the surface of the electronic substrate 20, the electronic substrate 20 is pressed against the end surface 83 a of the fixing portion 83. As a result, the electronic substrate 20 is fixed to the two fixing portions 83, 83.

  At this time, if the fastening force of the screw member 25 to the fixing portion 83 is increased and the electronic substrate 20 is strongly pressed against the end face 83a of the fixing portion 83, the electronic substrate 20 is slightly warped. Specifically, as shown in FIG. 5, when the electronic substrate 20 is strongly pressed against the end faces 83 a and 83 a of the two fixing portions 83 and 83, a straight line connecting the first mounting portions 81 and 81 on the electronic substrate 20. The part which becomes the both ends of L1 warps toward the front side with respect to the straight line L2 which connects both the fixing parts 83 and 83 (raises). Thus, the electronic substrate 20 is slightly deformed in a direction away from the end surfaces 81a and 81a of the first mounting portions 81 and 81.

As shown in FIG. 6, the end surface 81 a of the first placement portion 81 and the end surface 82 a of the second placement portion 82 are disposed slightly closer to the electronic substrate 20 side (front side) than the end surface 83 a of the fixing portion 83. .
The distance (height) H2 from the opening edge on the front side of the housing 40 to the end surface 83a of the fixing portion 83, the end surface 81a of the first mounting portion 81 and the second mounting portion from the opening edge on the front side of the housing 40. The distance (height) H1 to the end surface 82a of 82 is small .
When the front side of the housing 40 is set to the upper side and the back side is set to the lower side, the end surface 81a of the first mounting unit 81 and the end surface 82a of the second mounting unit 82 are slightly higher than the end surface 83a of the fixing unit 83. It will be arranged in.

  In the present embodiment, even when the electronic substrate 20 is warped, the first mounting portion 81 and the electronic substrate 20 are elastically abutted against the first mounting portion 81 and the second mounting portion 82. The positional relationship between the end surfaces 81 a and 82 a of the second placement portion 82 and the end surface 83 a of the fixed portion 83 is set. Thereby, even when the electronic substrate 20 is warped, the first placement portion 81 and the second placement portion 82 are pressed against the back surface of the electronic substrate 20.

When the electronic substrate 20 is fixed to the fixing portion 83, the entire end surface 81a of the first placement portion 81 and the entire end surface 82a of the second placement portion 82 need to be pressed against the back surface of the electronic substrate 20. However, it is only necessary that a part thereof is in contact.
Similarly, when the electronic substrate 20 is fixed to the fixing portion 83, it is not necessary that all the first placement portions 81 and all the second placement portions 82 are pressed against the back surface of the electronic substrate 20. The part should just contact | abut.

In the electronic control unit 10 as described above, as shown in FIG. 6, when the back surface of the electronic substrate 20 is brought into contact with the end face 83 a of the fixing portion 83, the first placement portion 81 and the second placement portion 82. The end surface 82 a contacts the back surface of the electronic substrate 20 at a position closer to the electronic substrate 20 (front side) than the end surface 83 a of the fixing portion 83.
Thereby, when the electronic substrate 20 is fixed to the fixing portion 83, even if the electronic substrate 20 is slightly warped, the electronic substrate 20 is fixed to the end surface 81 a of the first placement portion 81 and the end surface of the second placement portion 82. It can be elastically brought into contact with 82a. Thereby, the end surface 81 a of the first placement unit 81 and the end surface 82 a of the second placement unit 82 are pressed against the back surface of the electronic substrate 20.
Therefore, it is possible to prevent a gap from being generated between the end surface 81a of the first mounting portion 81 and the end surface 82a of the second mounting portion 82 and the back surface of the electronic substrate 20, and the first mounting portion 81 and the second mounting portion 81 can be prevented. The electronic substrate 20 can be reliably supported by the mounting portion 82 and the fixing portion 83.

  As shown in FIG. 4, the first mounting portion 81 and the straight line L1 connecting the two first mounting portions 81 and 81 and the straight line L2 connecting the two fixing portions 83 and 83 intersect each other. A fixing portion 83 is disposed. As a result, the two first placement portions 81 and 81 are arranged on both sides of the straight line L2 connecting both the fixing portions 83 and 83, respectively. Thus, since the 1st mounting part 81 is arrange | positioned according to the site | part which a curvature generate | occur | produces in the electronic substrate 20, the electronic substrate 20 can be effectively supported by the 1st mounting part 81. FIG.

  In the electronic control unit 10, the electronic substrate 20 can be reliably supported by the first placement portion 81, the second placement portion 82, and the fixing portion 83, so that the stress generated on the electronic substrate 20 can be dispersed. it can.

  Further, as shown in FIG. 6, the protrusion 81 b of the first placement portion 81 is inserted into the engagement hole 22 of the electronic substrate 20, and the electronic substrate 20 is fixed to the fixing portion 83 by the screw member 25, thereby The stability of the electronic substrate 20 with respect to 40 can be increased.

  As shown in FIG. 1, in the vehicle brake hydraulic pressure control device U using the electronic control unit 10 of the present embodiment, the stability of the electronic board 20 with respect to the housing 40 can be improved. It can prevent that 20 vibrates.

The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
In the present embodiment, the number and arrangement of the first placement portion 81, the second placement portion 82, and the fixing portion 83 shown in FIG. 4 are not limited, and correspond to the shape and size of the electronic substrate 20. It is set appropriately.
In the present embodiment, as shown in FIG. 5, the electronic substrate 20 is supported at four points. However, depending on the shape and size of the electronic substrate 20, three-point support or five-point support may be used. The number of supporting is not limited.

  In the present embodiment, as shown in FIG. 6, the end surface 81 a of the first placement portion 81 and the end surface 82 a of the second placement portion 82 are planes that are parallel to the front-side surface 44 a of the partition portion 44. However, the end surface 81a of the first placement unit 81 and the end surface 82a of the second placement unit 82 may be inclined along the back surface of the warped electronic substrate 20.

  Further, the end surface 81a (contact portion) of the first placement portion 81 and the end surface 82a (contact portion) of the second placement portion 82 may be formed into curved surfaces. Further, the tip end portions of the protrusions formed on the end surface 81 a (contact portion) of the first placement portion 81 and the end surface 82 a (contact portion) of the second placement portion 82 are in contact with the back surface of the electronic substrate 20. You may comprise.

  Further, in the present embodiment, as shown in FIG. 1, the electronic control unit 10 in the vehicle brake hydraulic pressure control device U is described as an example, but the apparatus to which the electronic control unit of the present invention is applied is limited. It is not something.

DESCRIPTION OF SYMBOLS 10 Electronic control unit 20 Electronic board 22 Engagement hole 23 Mounting hole 25 Screw member (connection means)
DESCRIPTION OF SYMBOLS 40 Housing 41 1st accommodating chamber 41a 1st surrounding wall part 42 2nd accommodating chamber 42a 2nd surrounding wall part 44 Partition part 45 Terminal aggregation part 45a Bus bar 50 Cover 81 1st mounting part 81a End surface (contact part)
81b Projection part 82 Second mounting part 82a End face (contact part)
83 Fixed part 83a End surface (contact part)
83b Screw hole 100 Base U Vehicle brake hydraulic pressure control device

Claims (5)

An electronic substrate;
An electronic control unit comprising a housing in which the electronic substrate is accommodated,
The housing includes
A placement unit on which the electronic substrate is placed;
A fixing portion to which the electronic substrate is fixed by a connecting means;
The contact portion that is the front end surface of the mounting portion and the contact portion that is the front end surface of the fixed portion are in contact with the back surface of the electronic substrate,
The electronic control unit according to claim 1, wherein the contact portion of the mounting portion is disposed on the front side of the contact portion of the fixed portion. The mounting portion is formed with a protrusion,
The fixing portion is formed with a screw hole,
The protrusion is inserted into an engagement hole formed in the electronic board,
2. The electronic control unit according to claim 1, wherein a screw member which is the connecting means penetrating the electronic substrate is screwed into the screw hole. The housing includes
At least two mounting parts are provided,
At least two of the fixing parts are provided,
2. The mounting parts and the fixing parts are arranged so that a straight line connecting the two mounting parts intersects with a straight line connecting the two fixing parts. The electronic control unit according to claim 2.   The electronic control unit according to any one of claims 1 to 3, wherein the electronic board is elastically in contact with the mounting portion. A base on which a brake fluid path is formed;
An electronic control unit according to any one of claims 1 to 4, comprising a vehicle brake hydraulic pressure control device comprising:
The electronic control unit is attached to one surface of the base body,
The vehicular brake hydraulic pressure control device, wherein the electronic board controls an electrical component mounted on the base.

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