JP2006151183A - Hydraulic control unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a smaller size hydraulic control unit as improvement of the conventional technique in which a positive electrode and negative electrode of a motor may be positioned separately and it requires provision of component mount prohibited zones in two places when the terminals of the positive and negative electrodes are to be soldered to a control board, which may lead to a large size construction of the control board and the hydraulic control unit itself. <P>SOLUTION: One end of the terminal 30 of the positive electrode inserted into a through hole 29 penetrating a housing 14 is soldered to the control board 28 while the other end is connected with the motor 10, in which the housing itself 14 is used as a connecting conductor of the negative electrode, and the terminal 22 for connection of the negative electrode is installed at the housing 14 in the neighborhood of the through hole 29, while a negative electrode conductor 24 connected with the terminal 22 and soldered to the control board 28 is installed on a current feed block 16, whereby connection between the terminal 22 and the negative electrode conductor 24 is established when the current feed block 16 is installed on the housing 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hydraulic pressure control unit, which is a miniaturized hydraulic pressure control unit in consideration of the arrangement of terminal terminals for connecting a motor and a control board.

  Some vehicles have an anti-lock brake device (ABS). The anti-lock brake device has a housing that contains a pump for sucking up brake fluid, a motor for driving the pump, a solenoid valve for controlling the flow path, and a power supply device for supplying current to the motor. They are assembled together and configured as a single hydraulic control unit.

  A conventional hydraulic pressure control unit is configured as described in Patent Document 1, for example. That is, a housing incorporating a pump is provided, a motor for driving the pump is provided on one side of the housing via a motor case, and a control board for supplying current to the motor is provided on the other side. A power supply block is provided.

  A pair of through holes is formed in the housing for the purpose of inserting positive and negative wirings for connecting the control board and the motor.

However, if a pair of through-holes are formed in the housing, the formation of the through-holes occupies a lot of space and enlarges the hydraulic pressure control unit. A single hole for wiring is formed and the negative electrode is grounded to the housing.
JP 2001-523611 A JP-A-6-122364

  However, when soldering the positive and negative terminal terminals to the control board, it is necessary to provide a component mounting prohibition zone around the soldered part in order to avoid the effects of heat when soldering by automation of assembly In this case, if the positive electrode and the negative electrode are separated from each other on the control board, component mounting prohibition bands will be separately provided at two locations, which not only increases the size of the control board but also provides a hydraulic control unit. Increase in size.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a hydraulic control unit that is reduced in size by providing a component mounting prohibition zone in one place.

  The invention according to claim 1 includes a housing that includes a pump for generating hydraulic pressure and is formed of a conductive material, and a motor block that includes a motor that is attached to one side of the housing and drives the pump. A power supply block that is attached to the other side of the housing and includes a control board for supplying a current to the motor, and has one end of a connection conductor of one electrode inserted through a through-hole penetrating the housing Solder to the control board and connect the other end to the motor, use the housing itself as a connecting conductor of the other electrode, solder one end of the housing to the control board and connect the other end to the motor In the connected hydraulic control unit, the other electrode is provided near the through hole and on the surface of the housing facing the power feeding block. A first connector for connection is provided, and a second connector connected to the first connector and soldered to the control board is provided on a surface of the power supply block facing the housing, and the power supply is supplied to the housing. The first connector and the second connector are connected when the block is assembled.

  In such a hydraulic control unit, the soldered portion of the positive and negative connection conductors for energizing the motor from the control board can be arranged close to one place on the control board. Compared to the case where the positive and negative electrodes are separated and the component mounting prohibition band is provided separately at two locations, the space occupied by the component mounting prohibition band can be reduced, and the control board and further the hydraulic control unit can be made smaller accordingly. Turn into.

  According to a second aspect of the present invention, in the hydraulic pressure control unit according to the first aspect, an electromagnetic valve for opening and closing a flow path formed in the housing is provided on the other side of the housing so as to project the electromagnetic valve. The coil terminal for driving the valve is soldered on the control board, and the connector terminal of the second connector is soldered on the control board in the vicinity of the coil terminal.

  In such a hydraulic control unit, the solder portions of the coil and the connector are concentrated on the control board, and the mounting density of the solder portions is improved. For this reason, the space occupied by the component mounting prohibition zone is small, and the control board and further the hydraulic control unit are reduced in size accordingly.

  The invention according to claim 3 is the hydraulic control unit according to claim 1 or 2, wherein the second connector is connected to the first connector from the same direction as the assembly direction of the power feeding block to the housing. It is characterized by that.

  In such a hydraulic control unit, since the assembly direction of the power supply block with respect to the housing is the same as the connection direction of the second connector with respect to the first connector, the assembly operation and the electrical connection operation can be performed simultaneously in one operation. .

  Embodiments of the hydraulic control unit according to the present invention will be described below.

  FIG. 5 is a brake hydraulic circuit diagram used in a brake device for a four-wheel passenger car. First, the brake hydraulic circuit diagram will be described.

  As shown in the figure, the master cylinder 1 is provided with a brake petal 1c. When the brake petal 1c is stepped on, a brake fluid pressure corresponding to the brake pedal force is generated, and an output that transmits this brake fluid pressure to the outside. Ports 1a and 1b are provided. The output ports 1a and 1b are connected to the brake wheel cylinders 4a, 4b, 4c and 4d in the four wheels 2a, 2b, 2c and 2d via the brake fluid pressure control unit 3.

  Output ports 1 a and 1 b of the master cylinder 1 are connected to suction ports 12 a and 12 b of the brake fluid pressure control unit 3. The discharge ports 13a, 13b, 13c, 13d of the brake fluid pressure control unit 3 are connected to the wheel cylinders 4a, 4b, 4c, 4d.

  The brake fluid pressure control unit 3 is configured as follows. The master cylinder 1 is connected to each of the wheel cylinders 4a, 4b, 4c, and 4d via normally open inlet valves 5a, 5b, 5c, and 5d. And check valves 7a, 7b, 7c and 7d are connected in parallel with the inlet valves 5a, 5b, 5c and 5d, respectively.

  On the other hand, each of the wheel cylinders 4a, 4b, 4c, and 4d is indirectly connected to the master cylinder 1 via normally closed outlet valves 6a, 6b, 6c, and 6d and a reflux means.

  The configuration of the reflux means will be described. The outlet valves 6a and 6b are connected to the reservoir 8a, and the outlet valves 6c and 6d are connected to the reservoir 8b. The reservoirs 8a and 8b are connected to ports on the suction side of plunger-type return pumps 9a and 9b, and a motor 10 is linked to the pumps 9a and 9b. Orifices 11 a and 11 b are provided between the return pumps 9 a and 9 b and the master cylinder 1.

  When the wheel is about to enter the locked state by stepping on the brake petal 1c, the brake fluid from the intake ports 12a, 12b to the wheel cylinders 4a, 4b, 4c, 4d is supplied to the inlet valves 5a, 5b, 5c, 5d and While the outlet valves 6a, 6b, 6c and 6d are shut off, the brake fluid from the wheel cylinders 4a, 4b, 4c and 4d to the reservoirs 8a and 8b is controlled to pass.

  That is, among the inlet valves 5a, 5b, 5c and 5d, the inlet valve corresponding to the wheel which is likely to be locked is excited and closed, while the outlet valves 6a, 6b, 6c and 6d are closed. The corresponding outlet valve is excited and opened. For this reason, a part of the brake fluid in the wheel cylinders 4a, 4b, 4c, 4d of the wheel which is about to enter the locked state is introduced into one of the reservoirs 8a, 8b via the opened outlet valve, The brake fluid pressure of the wheel that is about to become locked is reduced, and the lock of the wheel is prevented in advance. The brake fluid introduced into one of the reservoirs 8a and 8b is sucked into one of the return pumps 9a and 9b by the rotation of the motor 10, and the brake fluid passes through the orifices 11a and 11b into a flow path communicating with the master cylinder 1. Refluxed.

  The configuration of the brake fluid pressure control unit 3 will be described below. As shown in FIG. 1, the brake fluid pressure control unit 3 is configured by coupling a housing 14, a motor block 15, and a power feeding block 16. The housing 14 is made of a conductive aluminum alloy 17 and contains pumps 9a and 9b for generating hydraulic pressure. The pumps 9a and 9b are for returning the brake fluid in the reservoir to the master cylinder side during the pressure reduction control as described above. The motor block 15 is attached to one side of the housing 14, and a motor 10 for driving the pumps 9a and 9b is built in a yoke 18 made of a conductive material. The power supply block 16 is attached to the other side of the housing 14, and includes a control board 28 and the like for supplying current to the motor 10 in a casing 19 constituted by a main body 19a and a lid 19b made of an insulating material. is doing.

  The housing 14 is formed with a through hole 29 that penetrates the housing 14 from the motor block 15 toward the power supply block 16, and one end of a positive connection conductor inserted through the through hole 29 is connected to the control board 28. In addition, the other end is connected to the motor 10. That is, it is as follows. A flat terminal terminal (connecting conductor) 30 having a rectangular cross section as shown in FIG. 2A is embedded in the resin 30a attached to the motor block 15, and the terminal terminal 30 projects from the motor block 15 together with the resin 30a. ing. One end of the terminal terminal 30 is connected to the positive terminal 10 a of the motor 10 through a connection line (connection conductor) 27. Connection from the terminal terminal 30 to the control board 28 will be described later.

  On the other hand, the housing 14 itself is used as a negative connection conductor for the motor 10. Since the aluminum alloy 17 itself is used as a negative connection conductor, the negative terminal 10b of the motor 10 is connected to a yoke (connection conductor) 18 made of a conductive material via a connection line (connection conductor) 20, and the yoke 18 and aluminum are further connected. In order to electrically connect the alloy 17, a conductive metal screw (connection conductor) 21 is provided. The metal screw 21 is provided through the flange portion 18 a of the yoke 18, and the motor block 15 is coupled to the housing 14 by screwing the metal screw 21 into a screw hole 17 a formed in the aluminum alloy 17.

  Next, a connection portion between the housing 14 and the power feeding block 16 will be described. A terminal terminal (connection conductor, first connector) 22 for connecting a negative electrode to the housing 14 is provided in the vicinity of the through hole 29 and on the opposing surface of the housing 14 and the power supply block 16. That is, as shown in FIG. 4, the holding hole 17b is formed on the surface of the aluminum alloy 17 facing the power supply block 16, while the base portion is embedded in the terminal portion 22a and the terminal portion 22a. A terminal terminal 22 is provided, and the terminal portion 22a is press-fitted and fixed in the holding hole 17b. The terminal terminal 22 has a flat plate shape, and its cross-sectional shape is formed in a rectangular shape like the terminal terminal 30. The terminal portion 22a is formed in a cylindrical shape from a brass metal material, and a tip end portion is formed in a tapered shape to facilitate press-fitting.

  As shown in FIGS. 1 and 2, electromagnetic valves 5 a to 5 d and 6 a to 6 d for opening and closing a flow path (not shown) formed inside the housing 14 are provided on the other side of the housing 14 provided with the terminal terminals 30. A total of 8 protrusions are provided. The coils 25 a to 25 d and 26 a to 26 d for driving the electromagnetic valves 5 a to 5 d and 6 a to 6 d are arranged at corresponding positions in the main body 16 a in the power supply block 16. Further, in the vicinity of the positions corresponding to the coils 25a to 25d and 26a to 26d, as shown in FIG. 3, a pair (positive and negative) coil terminals 35a to 35d and four lower coils of each of the four upper coils are provided. A pair of coil terminals 36a to 36d are soldered on the control board 28 so as to approach each other in the vertical direction.

  In the power supply block 16, members for connecting the terminal terminals 30 and 22 to the control board 28 are provided. That is, it is as follows. As shown in FIG. 2, the terminal terminals 30 and 22 in the housing 14 are arranged at the central portion where the solenoid valves 5a to 5d and 6a to 6d are equally distributed to the left and right, as shown in FIG. , 22 and sockets 19c, 19d are formed at respective positions of the power supply block 16 corresponding to the vertical positions. A positive conductor (connection conductor) 23 is provided in the socket 19c, and a negative conductor (connection conductor, second connector) 24 is provided in the socket 19d. That is, when the power feeding block 16 is assembled to the housing 14, the terminal terminal 30 is connected to the positive conductor 23, and the terminal terminal 22 (first connector) is connected to the negative conductor (second connector) 24. .

  The other end of the positive electrode conductor 23 and the other end (connector terminal) of the negative electrode conductor 24 are soldered to the control board 28, respectively. As shown in FIG. 3, a total of four coil terminals, ie, a pair (positive and negative) coil terminals 35a of the leftmost coil 25a and a pair of coil terminals 36a of the coil 26a are brought close to each other, and the positions of the apexes of the rectangle The terminal group A is comprised. The other three sets of coil terminals are also arranged in the same manner, and constitute terminal groups B, C, and D. At the center position where the terminal groups A, B, C, and D are horizontally arranged, the other ends of the positive electrode conductor 23 are bifurcated and the other end of the negative electrode conductor 24 is bifurcated. The branch terminals 24 a and 24 b are soldered to the control board 28.

  Here, in FIG. 3, although the height positions of the positive electrode conductor 23 and the negative electrode conductor 24 exist at the same position as the pair of coil terminals 35a to 35d, 36a to 36d, they are at different height positions in FIG. However, for convenience of explanation, the pair of coil terminals 35a to 35d in FIG. 1 are disposed above the actual position, and the pair of coil terminals 36a to 36d are disposed below the actual position. It is drawn to see what should be invisible.

  The housing 14, the motor block 15, and the power feeding block 16 are assembled as follows. First, in order to assemble the housing 14 and the motor block 15, the terminal terminal 30 and the resin 30a are inserted into the through hole 29, and the metal screw 21 is screwed into the screw hole 17a. Next, the electromagnetic valves 5a to 5d and 6a to 6d protruding from the housing 14 are inserted into the coils 25a to 25d and 26a to 26d of the power supply block 16, and at the same time, the terminal terminals 30 and 22 are connected to the sockets 19c and 19d. And are connected to the positive electrode conductor 23 and the negative electrode conductor 24. Thereafter, the housing 14 and the power supply block 16 are coupled via a bolt (not shown). Since the assembly direction of the power supply block 16 with respect to the housing 14 and the connection direction of the positive conductor 23 and the negative conductor 24 with respect to the terminal terminals 30 and 22 are the same, the assembly operation and the electrical connection operation can be performed simultaneously in one operation.

  Next, a current flow to the motor 10 will be described. A current flows through the positive terminal 10a of the motor 10 in the order of the control board 28 → the positive conductor 23 → the terminal terminal 30 → the connection line 27 → the positive terminal 10a, and from the negative terminal 10b, the negative terminal 10b → the connection line 20 → the yoke. Current flows in the order of 18 → metal screw 21 → aluminum alloy 17 → terminal terminal 22 → negative electrode conductor 24 → control board 28.

  In such a hydraulic pressure control unit, there are two locations, a soldered portion between the control board 28 and the positive conductor 23 and a soldered portion between the control board 28 and the negative conductor 24 for energizing the motor 10 from the control board 28. As shown in FIG. 3, the soldered portion can be disposed close to one place on the control board 28 in the vertical direction. Compared with the case where the positive electrode conductor 23 and the negative electrode conductor 24 are separated from each other, and the component mounting prohibited band is provided at two locations separately in the portion where the positive electrode conductor 23 and the negative electrode conductor 24 are soldered to the control board 28, The space occupied by the band is small, and the control board 28 and further the hydraulic control unit can be reduced in size accordingly.

  Further, the solder portions of the pair of coil terminals 35a to 35d and 36a to 36d of the coils 25a to 25d and 26a to 26d on the control board 28 and the solder portions of the positive conductor 23 and the negative conductor 24 for the motor 10 are one. Since it is concentrated and arranged at the location, the mounting density of the solder portion is further improved. For this reason, the space occupied by the component mounting prohibition zone can be reduced, and the control board 28 and further the hydraulic control unit can be reduced in size.

  In the present embodiment, negative electrode terminal 10b of motor 10 is connected to aluminum alloy 17 via yoke 18 and metal screw 21, but negative electrode terminal 10b may be directly connected to aluminum alloy 17 via a cable or the like. Good. In the present embodiment, the housing is used as a negative connection conductor, but may be used as a positive connection conductor. Further, the part where the terminal terminals 30 and 22 are soldered to the control board is arranged in the part where the pair of coil terminals are soldered to the control board, but other terminals may be arranged in the part to be soldered. Alternatively, soldering may be performed on a portion where no terminal exists.

FIG. 3 is an exploded cross-sectional view of the hydraulic pressure control unit (embodiment). The sectional view of a housing in connection with a hydraulic control unit (embodiment). The front view (embodiment) of a control board concerning a hydraulic control unit. The principal part enlarged view of a housing in connection with a hydraulic control unit (embodiment). Brake hydraulic circuit diagram.

Explanation of symbols

5a to 5d, 6a to 6d ... Solenoid valve 9a, 9b ... Pump 10 ... Motor 10a ... Positive electrode terminal 10b ... Negative electrode terminal 14 ... Housing 15 ... Motor block 16 ... Feeding block 17 ... Aluminum alloy (connection conductor)
18 ... Yoke (connection conductor)
20, 27 ... Connection line (connection conductor)
21 ... Metal screw (connection conductor)
22 ... Terminal terminal (connection conductor, first connector)
23 ... Positive conductor (connection conductor)
24 ... Negative electrode conductor (connection conductor, second connector)
25a to 25d, 26a to 26d ... Coil 28 ... Control board 29 ... Through hole 30 ... Terminal terminal (connection conductor)
35a to 35d, 36a to 36d, coil terminals

Claims (3)

A housing that contains a pump for generating hydraulic pressure and is made of a conductive material, a motor block that is attached to one side of the housing and houses a motor that drives the pump, and is attached to the other side of the housing. A power supply block that incorporates a control board for supplying current to the motor.
Soldering one end of the connection conductor of one electrode inserted into the through hole penetrating the housing to the control board and connecting the other end to the motor, using the housing itself as a connection conductor of the other electrode, In the hydraulic control unit in which one end side of the housing is soldered to the control board and the other end side is connected to the motor,
A first connector for connecting the other electrode is provided in the vicinity of the through hole and on the surface of the housing facing the power supply block, and is connected to the first connector and soldered to the control board. A second connector provided on a surface of the power supply block facing the housing;
The hydraulic control unit, wherein the first connector and the second connector are connected when the power feeding block is assembled to the housing. The hydraulic control unit according to claim 1, wherein an electromagnetic valve for opening and closing a flow path formed in the housing is provided on the other side of the housing, and a coil for driving the electromagnetic valve is provided. A hydraulic pressure control unit, wherein a coil terminal is soldered on the control board, and a connector terminal of the second connector is soldered on the control board in the vicinity of the coil terminal. 3. The hydraulic control unit according to claim 1, wherein the second connector is connected to the first connector from the same direction as an assembly direction of the power feeding block with respect to the housing. unit.

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