JP6399634B2 - Hydraulic pressure generator - Google Patents

Description

  The present invention relates to a hydraulic pressure generator used in a vehicle brake system.

  The hydraulic pressure generator that generates the brake hydraulic pressure according to the operation amount of the brake operator includes a master cylinder device that generates the brake hydraulic pressure by a piston connected to the brake operator, and a piston that uses a motor as a drive source. Some include a motor cylinder device that generates a brake fluid pressure, and a stroke simulator that applies a pseudo operation reaction force to the brake operator (see, for example, Patent Document 1).

JP 2012-210879 A

  In the above-described conventional hydraulic pressure generating device, since the master cylinder device and the motor cylinder device are separate units, it is necessary to secure a space for mounting in the vehicle for each unit. Further, in the conventional hydraulic pressure generator, since each unit is connected by a plurality of external pipes, it is difficult to secure a space for mounting on the vehicle, and the number of assembly steps for mounting on the vehicle increases. ing.

  It is an object of the present invention to provide a hydraulic pressure generating device that makes it easy to secure a space for mounting on a vehicle and can reduce the number of assembly steps to the vehicle.

In order to solve the above-mentioned problems, a hydraulic pressure generator according to the present invention includes a base, a master cylinder that generates brake hydraulic pressure by a first piston coupled to a brake operator, and a second piston that uses a motor as a drive source. A motor cylinder for generating brake fluid pressure. The base has a bottomed first cylinder hole into which the first piston is inserted and a bottomed second cylinder hole into which the second piston is inserted. The first cylinder hole is opened on the rear surface of the base, the second cylinder hole is opened on one side of the base, and the motor is attached. On the other side of the base body, which is the side opposite to the one side, a protrusion is formed and a control device for controlling the motor is attached. Wherein the control device includes a housing is a box body control board is accommodated, the protrusion together are housed in a front KIHA Ujingu are bottom of the second cylinder bore is formed in said projecting portion The bottom surface of the housing is provided with a bottomed cylindrical convex portion formed by expanding a portion for accommodating the tip of the protruding portion.

In the present invention, each cylinder hole of the master cylinder and the motor cylinder is provided in one base, and the two devices described above are configured as one unit. Furthermore, in the present invention, since the first cylinder hole is opened on the rear surface of the base and the second cylinder hole is opened on one side of the base, the master cylinder and the motor cylinder can be arranged with good balance with respect to the base. it can. That is, the longitudinal directions of the master cylinder and the motor cylinder are crossed so that the units of the master cylinder and the motor cylinder fit in a substantially cubic space. As described above, in the present invention, the unit of the master cylinder and the motor cylinder can be configured in a compact manner, so that it is easy to secure a space for mounting the hydraulic pressure generator on the vehicle.
Further, by making the master cylinder and the motor cylinder into one unit, the two devices described above can be connected by a hydraulic path in the base body, and thus external piping can be omitted or reduced. Therefore, it is possible to reduce the assembly cost when mounting the hydraulic pressure generating device on the vehicle and reduce the number of parts, thereby reducing the manufacturing cost.

  In the above-described hydraulic pressure generating device, the first cylinder hole and the second cylinder hole are spaced apart in the vertical direction, and the axes of the first cylinder hole and the second cylinder hole are three-dimensionally intersected. Is desirable. In this configuration, the master cylinder and the motor cylinder can be arranged compactly inside the base body independently of each other.

  When the hydraulic pressure generating device includes a stroke simulator that applies a pseudo operation reaction force to the brake operation element by the biased third piston, a bottomed bottom into which the third piston is inserted Preferably, the third cylinder hole is formed in the base body, and the third cylinder hole is opened on the rear surface of the base body.

In this configuration, the unit composed of the three devices of the master cylinder, the motor cylinder, and the stroke simulator can be configured in a compact manner, so that it is easy to secure a space for mounting the hydraulic pressure generator on the vehicle.
In addition, since the three devices of the hydraulic pressure generator can be connected by the hydraulic path in the base body, the number of assembly steps when mounting the hydraulic pressure generator on the vehicle is reduced and the number of parts is reduced. Cost can be reduced.

  Further, in the configuration in which the first cylinder hole and the third cylinder hole are opened on the rear surface of the base body, the direction in which the drilling tool is inserted into the base body becomes the same, so that the workability of each cylinder hole can be improved.

  Furthermore, when the first cylinder hole and the third cylinder hole are arranged side by side, the two cylinder holes can be compactly accommodated in the base body.

  In the above-described hydraulic pressure generator, it is desirable that the second cylinder hole is disposed between the first cylinder hole and the third cylinder hole. In this configuration, the motor of the motor cylinder can be disposed between the master cylinder and the stroke simulator. Thereby, a motor can be arrange | positioned with sufficient balance with respect to a base | substrate.

  In the above-described hydraulic pressure generating device, a part of the hydraulic pressure path may be disposed on the peripheral wall portion of the protruding portion. In this configuration, the hydraulic path leading to the second cylinder hole can be arranged in a compact manner.

  In the above-described hydraulic pressure generator, when a reservoir for storing brake fluid is attached to the upper surface of the base body, the reservoir can be laid out on the upper surface of the base body so that the master cylinder, the motor cylinder and the reservoir can be integrated into one unit. .

  In the above-described hydraulic pressure generator, it is desirable to form a relief portion in which the base is thinned at the lower part of the front surface of the base. In this configuration, when the hydraulic pressure generating device is mounted on the vehicle, it is possible to prevent the lower part of the front surface of the base body from interfering with the installation space of various devices such as an engine. Therefore, the hydraulic pressure generating device is mounted on the vehicle. Therefore, it becomes easy to secure the space for.

  In the present invention, each device of the hydraulic pressure generating device is configured as a single unit, and the unit can be configured compactly, so that it is easy to secure a space for mounting the hydraulic pressure generating device on the vehicle. . Moreover, by making each device of the hydraulic pressure generator into one unit, it is possible to reduce the number of assembling steps for mounting on the vehicle and to reduce the manufacturing cost.

It is the whole lineblock diagram showing the brake system for vehicles using the fluid pressure generating device of this embodiment. It is the figure which showed the hydraulic-pressure generator of this embodiment, (a) is a side view, (b) is a top view. It is the figure which showed the hydraulic pressure generator of this embodiment, and is AA sectional drawing of FIG.2 (b). It is the figure which showed the hydraulic pressure generator of this embodiment, and is BB sectional drawing of FIG.2 (b).

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the present embodiment, a case where the hydraulic pressure generating device of the present invention is applied to the vehicle brake system A shown in FIG. 1 will be described as an example.
FIG. 1 schematically shows the overall configuration of the vehicle brake system A, and the arrangement of each device shown in FIG. 1 and the arrangement of each device shown in FIGS. Absent.

  As shown in FIG. 1, the vehicle brake system A includes a by-wire brake system that operates when a prime mover (such as an engine or an electric motor) is started, and a hydraulic system that operates when the prime mover is stopped. It is equipped with both brake systems.

The vehicle brake system A includes a hydraulic pressure generator 1 that generates a brake hydraulic pressure in accordance with an operation amount of a brake pedal P (“brake operator” in the claims), and a liquid that supports stabilization of vehicle behavior. A pressure control device 2.
The vehicle brake system A can be mounted not only on a vehicle that uses only an engine (internal combustion engine) as a power source, but also on a hybrid vehicle that uses a motor together, an electric vehicle that uses only a motor as a power source, and a fuel cell vehicle. .

  The hydraulic pressure generating device 1 simulates the base 10, the master cylinder 20 that generates brake hydraulic pressure by the depression force of the brake pedal P, the motor cylinder 30 that generates brake hydraulic pressure using the motor 34 as a drive source, and the brake pedal P. A stroke simulator 40 for applying a general operation reaction force, and a control device 50 (see FIG. 2B).

  In addition, each direction in the following description is set for convenience in describing the hydraulic pressure generating device 1, but generally coincides with a direction when the hydraulic pressure generating device 1 is mounted on a vehicle. That is, the movement direction of the rod P1 when the brake pedal P is depressed is the front (front end side), and the movement direction of the rod P1 when the brake pedal P returns is the rear (rear end side) (FIG. 2A )reference). Furthermore, the direction perpendicular to the moving direction (front-rear direction) of the rod P1 is defined as the left-right direction (see FIG. 2B).

  The base body 10 is a metal part mounted on a vehicle (see FIGS. 2A and 2B) and includes a substantially rectangular parallelepiped main body 10a. Three cylinder holes 21, 31, 41 and a plurality of hydraulic pressure paths 11a, 11b, 12, 14a, 14b, 14c are formed in the main body 10a. Further, as shown in FIG. 2B, various components such as a reservoir 26 and a motor 34 are attached to the base 10.

  As shown in FIG. 2A, an escape portion 10f is formed in the lower portion of the front surface 10b of the main body portion 10a. The escape portion 10f is a portion where the lower portion of the front surface 10b of the main body portion 10a is recessed backward from the upper portion of the front surface 10b. That is, a notch is formed in the lower part of the front surface 10b of the main body 10a.

As shown in FIGS. 2A and 2B, a control device 50 is attached to the right side surface 10h (the “other side surface” in the claims) of the main body 10a.
A cylindrical projecting portion 10i projects from the right side surface 10h of the main body portion 10a. The protruding portion 10 i is provided at the lower center of the right side surface 10 h in the front-rear direction and is accommodated in the housing 51 of the control device 50.
Moreover, the protruding item | line 10j is formed in the upper end part of the surrounding wall part of the protrusion part 10i. The ridge 10j extends in the axial direction (left-right direction) of the protrusion 10i.

  As shown in FIG. 3, the first cylinder hole 21 is a bottomed cylindrical hole. The axis L1 of the first cylinder hole 21 extends in the front-rear direction. The first cylinder hole 21 opens at the end surface of the cylindrical portion 10k formed on the rear surface 10c of the main body portion 10a.

As shown in FIG. 4, the second cylinder hole 31 is a bottomed cylindrical hole that is spaced apart from the first cylinder hole 21. The axis L2 of the second cylinder hole 31 extends in the left-right direction, and three-dimensionally intersects with the axis L1 of the first cylinder hole 21 (see FIG. 2B). The second cylinder hole 31 opens in the left side surface 10g (“one side surface” in the claims) of the main body portion 10a.
The bottom surface 31a of the second cylinder hole 31 is disposed in the protruding portion 10i. That is, the bottom of the second cylinder hole 31 is disposed in the protruding portion 10 i and is accommodated in the housing 51 of the control device 50.

  As shown in FIG. 3, the third cylinder hole 41 is a bottomed cylindrical hole that is spaced below the first cylinder hole 21 and the second cylinder hole 31. The axis L3 of the third cylinder hole 41 is parallel to the axis L1 of the first cylinder hole 21. The third cylinder hole 41 opens in the rear surface 10c of the main body 10a.

  In the present embodiment, the first cylinder hole 21 and the third cylinder hole 41 are arranged in parallel, and the second cylinder hole 31 is disposed between the first cylinder hole 21 and the third cylinder hole 41. When the axis L1 of the first cylinder hole 21 and the axis L3 of the third cylinder hole 41 are projected onto a horizontal plane passing through the axis L2 of the second cylinder hole 31, the axis L2 of the second cylinder hole 31 is It is orthogonal to the axis L1 of 21 and the axis L3 of the third cylinder hole 41 (see FIG. 2B). Further, the axis L2 of the second cylinder hole 31 is orthogonal to the vertical line connecting the axial center position of the first cylinder hole 21 and the axial center position of the third cylinder hole 41 as shown in FIG. doing.

  As shown in FIG. 3, the master cylinder 20 includes two first pistons 22 and 23 (secondary pistons and primary pistons) inserted into the first cylinder hole 21, and two first cylinders 21 accommodated in the first cylinder hole 21. Two elastic members 24 and 25.

  A bottom-side pressure chamber 21c is formed between the bottom surface 21a of the first cylinder hole 21 and the first piston 22 (secondary piston) on the bottom surface 21a side. A first elastic member 24 made of a coil spring is accommodated in the bottom side pressure chamber 21c.

  An opening-side pressure chamber 21d is formed between the first piston 22 on the bottom surface 21a side and the first piston 23 (primary piston) on the opening 21b side. A second elastic member 25 made of a coil spring is accommodated in the opening-side pressure chamber 21d.

  The rear end portion of the first piston 23 on the opening 21b side is connected to a brake pedal P (see FIG. 1) via a rod P1. Both the first pistons 22 and 23 receive the depression force of the brake pedal P, slide in the first cylinder hole 21, and pressurize the brake fluid in the bottom side pressure chamber 21c and the opening side pressure chamber 21d.

A reservoir 26 is connected to the first cylinder hole 21 as shown in FIG. The reservoir 26 is a container that stores brake fluid, and is attached to the upper surface 10d of the main body 10a. The two liquid supply portions 26a and 26a protruding from the lower surface of the reservoir 26 are inserted into the two reservoir union ports 17 and 17 formed on the upper surface 10d of the main body portion 10a.
Communication holes 17 a and 17 a communicating with the inner peripheral surface of the first cylinder hole 21 are opened on the bottom surfaces of the two reservoir union ports 17 and 17. One communication hole 17 a is connected to a liquid supply path 17 b that communicates with the inner peripheral surface of the second cylinder hole 31.
A hose 26c extending from a main reservoir (not shown) is connected to the liquid supply pipe 26b of the reservoir 26.

As shown in FIG. 4, the motor cylinder 30 includes a second piston 32 inserted into the second cylinder hole 31, an elastic member 33 accommodated in the second cylinder hole 31, and a motor 34. .
A pressure chamber 31 c is formed between the bottom surface 31 a of the second cylinder hole 31 and the second piston 32. An elastic member 33 made of a coil spring is accommodated in the pressure chamber 31c.
A liquid supply passage 17b communicating with the reservoir union port 17 (see FIG. 1) is opened on the inner peripheral surface of the second cylinder hole 31, and a supply passage formed on the peripheral wall portion of the second piston 32 from the liquid supply passage 17b. Brake fluid can be supplied to the pressure chamber 31c through the fluid port 32a.

As shown in FIG. 4, the motor 34 is an electric servo motor that is driven and controlled by a control device 50 described later. The motor 34 is attached to the left side surface 10g of the main body 10a. A rod 35 protrudes from the center of the right end surface of the case 34a of the motor 34 toward the left.
The case 34a of the motor 34 accommodates a drive transmission unit that converts the rotational driving force of the output shaft of the motor 34 into a linear axial force. The drive transmission unit is configured by a ball screw mechanism, for example. When the rotational driving force of the output shaft of the motor 34 is input to the drive transmission unit, a linear axial force is applied to the rod 35 from the drive transmission unit, and the rod 35 moves forward and backward in the left-right direction.

  The rod 35 is inserted into the second cylinder hole 31 from the opening 31b. The axis of the rod 35 is arranged coaxially with the axis L2 of the second cylinder hole 31. That is, the center position of the case 34a of the motor 34 and the axis L2 of the second cylinder hole 31 coincide. Then, when the right end surface of the case 34 a is projected onto a plane passing through the axis L 1 of the first cylinder hole 21 and the axis L 3 of the third cylinder hole 41, the right end surface of the case 34 a becomes the first cylinder hole 21 and the third cylinder hole 41. Overlapping part.

  The tip of the rod 35 is in contact with the second piston 32. When the rod 35 moves to the right, the second piston 32 receives the input from the rod 35 and slides in the second cylinder hole 31 to pressurize the brake fluid in the pressure chamber 31c.

  As shown in FIG. 3, the stroke simulator 40 includes a third piston 42 inserted into the third cylinder hole 41, a lid member 43 that closes the opening 41 b of the third cylinder hole 41, and the third cylinder hole 41. And an elastic member 44 housed in the housing.

A bottom-side pressure chamber 41 c is formed between the bottom surface 41 a of the third cylinder hole 41 and the third piston 42. In the third cylinder hole 41, an opening-side pressure chamber 41d is formed between the lid member 43 and the third piston 42. An elastic member 44 that is a coil spring is accommodated in the opening-side pressure chamber 41d.
A plurality of liquid supply ports 42 a are formed in the peripheral wall portion of the third piston 42. Then, the brake fluid flows into the third piston 42 from the branch fluid pressure passage 12 through each fluid supply port 42a, and the brake fluid enters the branch fluid pressure passage 12 from the third piston 42 through each fluid supply port 42a. It is configured to flow out.
The distance La between the seal member 45 provided on the inner peripheral surface of the third cylinder hole 41 and each liquid supply port 42a is set to be larger than the distance Lb between the lid member 43 and the third piston 42. . Thereby, even when the third piston 42 moves most toward the lid member 43, each liquid supply port 42 a is located on the bottom surface 41 a side with respect to the seal member 45.

  In the stroke simulator 40, the third piston 42 moves toward the lid member 43 against the urging force of the elastic member 44 by the brake fluid pressure generated in the opening-side pressure chamber 21 d of the master cylinder 20. Then, a pseudo operation reaction force is applied to the brake pedal P (see FIG. 1) by the biased third piston 42.

Next, each hydraulic pressure path formed in the substrate 10 will be described.
As shown in FIG. 1, the two main hydraulic pressure paths 11 a and 11 b are hydraulic pressure paths starting from the first cylinder hole 21 of the master cylinder 20.
The first main hydraulic pressure passage 11 a communicates with the bottom pressure chamber 21 c of the master cylinder 20. The second main hydraulic pressure passage 11 b communicates with the opening-side pressure chamber 21 d of the master cylinder 20. Pipes Ha and Hb reaching the hydraulic pressure control device 2 are connected to the two output ports 16 and 16 which are the end points of both the main hydraulic pressure paths 11a and 11b.

  The branch hydraulic pressure path 12 is a hydraulic pressure path from the bottom pressure chamber 41c of the stroke simulator 40 to the second main hydraulic pressure path 11b. A normally closed electromagnetic valve 13 is provided in the branch hydraulic pressure path 12.

  The third communication hydraulic pressure path 14 c is a hydraulic pressure path starting from the second cylinder hole 31 of the motor cylinder 30. As shown in FIG. 4, a part of the third communication hydraulic pressure passage 14c is disposed in the protruding line 10j of the protruding part 10i. The third communication hydraulic path 14 c communicates with the bottom of the second cylinder hole 31.

  As shown in FIG. 1, the first communication hydraulic pressure path 14a and the second communication hydraulic pressure path 14b are hydraulic pressure paths starting from the third communication hydraulic pressure path 14c. The first communication hydraulic path 14a communicates with the first main hydraulic path 11a from the third communication hydraulic path 14c. Further, the second communication hydraulic path 14b communicates from the third communication hydraulic path 14c to the second main hydraulic path 11b.

In the first main hydraulic pressure passage 11a, a first switching valve 15a, which is a two-position three-port three-way valve, is provided at a connection portion with the connection portion with the first communication hydraulic pressure passage 14a.
The first switching valve 15a is a solenoid valve, and in the first position (initial state) when not energized, the upstream side (master cylinder 20 side) and the downstream side (output port 16 side) of the first main hydraulic pressure passage 11a. The first communication hydraulic pressure path 14a and the first main hydraulic pressure path 11a are shut off.
Further, the first switching valve 15a, in the second position at the time of energization, shuts off the upstream side and the downstream side of the first main hydraulic pressure path 11a, and the first communication hydraulic pressure path 14a and the first main hydraulic pressure. It communicates with the downstream side of the path 11a.
In the second main hydraulic pressure passage 11b, a second switching valve 15b, which is a two-position three-port three-way valve, is provided at a connection portion with the second communication hydraulic pressure passage 14b.
The second switching valve 15b is a solenoid valve, and in the first position (initial state) when not energized, the upstream side (master cylinder 20 side) and the downstream side (output port 16 side) of the second main hydraulic pressure passage 11b. The second communication hydraulic pressure path 14b and the second main hydraulic pressure path 11b are shut off.
Further, the second switching valve 15b, in the second position at the time of energization, shuts off the upstream side and the downstream side of the second main hydraulic pressure path 11b, and the second communication hydraulic pressure path 14b and the second main hydraulic pressure. It communicates with the downstream side of the path 11b.
In the first communication hydraulic pressure passage 14a, a normally open electromagnetic valve 15c is provided on the upstream side (master cylinder 20 side) of the connection portion with the third communication hydraulic pressure passage 14c.

  The two pressure sensors 18a and 18b detect the magnitude of the brake hydraulic pressure, and are installed in sensor mounting holes (not shown) that lead to the main hydraulic pressure paths 11a and 11b. Information acquired by both the pressure sensors 18a and 18b is output to the control device 50 (see FIG. 2B).

The first pressure sensor 18 a is disposed upstream of the first switching valve 15 a and detects the brake fluid pressure generated in the master cylinder 20.
The second pressure sensor 18b is disposed on the downstream side of the second switching valve 15b, and when the second communication hydraulic pressure path 14b and the downstream side of the second main hydraulic pressure path 11b communicate with each other, the motor cylinder The brake fluid pressure generated at 30 is detected.

  The stroke sensor 19 is a magnetic sensor that detects the position of the rod P1. Information acquired by the stroke sensor 19 is output to the control device 50 (see FIG. 2B). The control device 50 detects the amount of depression of the brake pedal P based on information from the stroke sensor 19.

As shown in FIGS. 2A and 2B, the control device 50 has a housing 51. The housing 51 is a resin box attached to the right side surface 10 h of the main body 10 a of the base body 10. A control board (not shown) is accommodated in the housing 51. Further, the housing 51 accommodates the protruding portion 10i of the main body portion 10a.
A convex portion 52 is formed on the right side surface of the housing 51. The convex part 52 is a bottomed cylindrical part and has a space for accommodating the tip part of the protruding part 10i. That is, only the portion necessary for accommodating the tip of the protruding portion 10i is expanded without increasing the thickness of the entire housing 51 in the left-right direction.

  As shown in FIG. 1, the control device 50 operates the motor 34 based on information obtained from various sensors such as the pressure sensors 18a and 18b and the stroke sensor 19 and a program stored in advance. It controls opening / closing of the closed solenoid valve 13, opening / closing of the normally open solenoid valve 15c, and switching of both switching valves 15a and 15b.

The hydraulic pressure control device 2 has a configuration capable of executing various hydraulic pressure controls such as anti-lock brake control and behavior stabilization control by appropriately controlling the brake hydraulic pressure applied to each wheel cylinder W of the wheel brake. And is connected to each wheel cylinder W through a pipe.
In addition, although illustration is abbreviate | omitted, the hydraulic control apparatus 2 is a hydraulic unit provided with an electromagnetic valve, a pump, etc., a motor for driving the pump, a control device for controlling the electromagnetic valve, the motor, etc. I have.

Next, an outline of the operation of the vehicle brake system A will be described.
In the vehicle brake system A, as shown in FIG. 1, when the ignition sensor of the vehicle is turned on or the stroke sensor 19 detects that the brake pedal P is slightly operated, the first switching valve 15a is The first communication hydraulic pressure passage 14a and the downstream side of the first main hydraulic pressure passage 11a communicate with each other while blocking the upstream side and the downstream side of the first main hydraulic pressure passage 11a. The second switching valve 15b communicates the second communication hydraulic pressure path 14b and the downstream side of the second main hydraulic pressure path 11b while blocking the upstream side and the downstream side of the second main hydraulic pressure path 11b. . Further, the normally closed solenoid valve 13 is opened.

  In this state, the brake fluid pressure generated in the master cylinder 20 by the operation of the brake pedal P is transmitted to the stroke simulator 40 without being transmitted to the wheel cylinder W. Then, the brake fluid pressure in the bottom pressure chamber 41c increases, and the third piston 42 moves toward the lid member 43 against the urging force of the elastic member 44, whereby the stroke of the brake pedal P is allowed. At this time, a pseudo operation reaction force is applied to the brake pedal P by the third piston 42 urged by the elastic member 44.

When the stroke sensor 19 detects the depression of the brake pedal P, the motor 34 of the motor cylinder 30 is driven, and the second piston 32 moves to the bottom surface 31a side, so that the brake fluid in the pressure chamber 31c flows. Pressurized.
The control device 50 detects the brake fluid pressure output from the motor cylinder 30 (the brake fluid pressure detected by the second pressure sensor 18b) and the brake fluid pressure output from the master cylinder 20 (detected by the first pressure sensor 18a). And the number of rotations of the motor 34 and the like are controlled based on the comparison result. In this way, the hydraulic pressure generator 1 generates the brake hydraulic pressure according to the amount of operation of the brake pedal P.

  The brake hydraulic pressure generated by the hydraulic pressure generating device 1 is transmitted to each wheel cylinder W via the hydraulic pressure control device 2, and the braking force is applied to each wheel by the operation of each wheel cylinder W.

  If an abnormality occurs in the brake fluid pressure detected by the second pressure sensor 18b while the second piston 32 of the motor cylinder 30 receives an input from the rod 35, the normally open solenoid valve 15c is used. Closes. Thereby, when the brake fluid pressure detected by the second pressure sensor 18b increases, a failure has occurred in the fluid pressure passage on the first communication fluid pressure passage 14a side. Further, when the brake hydraulic pressure detected by the second pressure sensor 18b does not increase, a failure has occurred in the hydraulic pressure path on the second communication hydraulic pressure path 14b side.

  Further, in a state where the motor cylinder 30 does not operate (for example, when electric power cannot be obtained), the first switching valve 15a communicates the upstream side and the downstream side of the first main hydraulic pressure passage 11a with the first switching valve 15a. The one communication hydraulic path 14a and the first main hydraulic path 11a are shut off. Moreover, the 2nd switching valve 15b interrupts | blocks the 2nd connection hydraulic pressure path 14b and the 2nd main hydraulic pressure path 11b, connecting the upstream and downstream of the 2nd main hydraulic pressure path 11b. Further, the normally closed solenoid valve 13 is closed. In this state, the brake fluid pressure generated in the master cylinder 20 is transmitted to each wheel cylinder W.

In the hydraulic pressure generator 1 as described above, as shown in FIG. 3, the cylinder holes 21, 31, 41 of the master cylinder 20, the motor cylinder 30 and the stroke simulator 40 are provided in one base body 10, These three devices are configured as one unit.
Further, the first cylinder hole 21 and the third cylinder hole 41 are opened on the rear surface 10c of the main body portion 10a of the base body 10, and the second cylinder hole 31 is opened on the left side surface 10g (see FIG. 4) of the main body portion 10a. . The axis L2 of the second cylinder hole 31 is three-dimensionally intersected with the axes L1 and L3 of the first cylinder hole 21 and the third cylinder hole 41. Thereby, the master cylinder 20, the motor cylinder 30, and the stroke simulator 40 can be arrange | positioned with sufficient balance with respect to the base | substrate 10. FIG.
That is, the longitudinal direction of the master cylinder 20 and the stroke simulator 40 and the longitudinal direction of the motor cylinder 30 are orthogonal to each other so that the units of the master cylinder 20, the motor cylinder 30 and the stroke simulator 40 are accommodated in a substantially cubic space. .
Accordingly, in the hydraulic pressure generating device 1 of the present embodiment, the units of the master cylinder 20, the motor cylinder 30 and the stroke simulator 40 can be configured in a compact manner, so that a space for mounting the hydraulic pressure generating device 1 on the vehicle is provided. It becomes easy to secure.

  Moreover, in the hydraulic pressure generator 1, as shown in FIG. 4, the second cylinder hole 31 is disposed between the first cylinder hole 21 and the third cylinder hole 41, and the motor 34 of the motor cylinder 30 is the master. Since it is attached between the cylinder 20 and the stroke simulator 40, the motor 34 can be arranged with good balance with respect to the base 10.

  Further, in the hydraulic pressure generating device 1, as shown in FIG. 3, the first cylinder hole 21 and the third cylinder hole 41 are opened on the rear surface 10 c of the main body portion 10 a of the base body 10. Accordingly, when the first cylinder hole 21 and the third cylinder hole 41 are machined from one direction with respect to the main body portion 10a, the insertion direction of the drilling tool becomes the same, so that the workability of each cylinder hole 21, 41 is improved. Can be improved.

  Further, in the hydraulic pressure generating device 1, as shown in FIG. 1, the master cylinder 20, the motor cylinder 30, and the stroke simulator 40 are combined into one unit, so that the three devices described above are separated by a hydraulic pressure path in the base 10. They can be connected, and as a result, external piping can be omitted or reduced. Therefore, it is possible to reduce the manufacturing cost by reducing the number of assembly steps when mounting the hydraulic pressure generating device 1 on the vehicle and reducing the number of parts.

Further, in the hydraulic pressure generating device 1, as shown in FIG. 4, a part of the third communication hydraulic pressure path 14 c is disposed in the ridge 10 j of the protruding portion 10 i of the base body 10, and the second cylinder hole 31 is inserted into the second cylinder hole 31. The hydraulic path leading to it is arranged compactly.
In the present embodiment, by providing the protrusion 10j on the peripheral wall portion of the protruding portion 10i, a part of the third communication hydraulic path 14c is arranged in the peripheral wall portion without increasing the thickness of the entire peripheral wall portion. However, you may arrange | position a part of 3rd connection hydraulic pressure path 14c in a cylindrical surrounding wall part.
Moreover, the shape of the protrusion part 10i is not limited, For example, you may form a protrusion part in a rectangular parallelepiped.

  Further, in the hydraulic pressure generating device 1, as shown in FIG. 2A, a relief portion 10f is formed in the lower portion of the front surface 10b of the main body portion 10a of the base body 10. Thereby, when mounting the hydraulic pressure generator 1 in a vehicle, it can prevent that the lower part of the front surface 10b of the base | substrate 10 interferes with the installation space of various apparatuses, such as an engine. Therefore, it is easy to secure a space for mounting the hydraulic pressure generator 1 on the vehicle.

  Further, in the hydraulic pressure generator 1, the reservoir 26 is laid out on the upper surface of the base 10, and the master cylinder 20, the motor cylinder 30, the stroke simulator 40, and the reservoir 26 are configured as one unit.

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, as shown in FIG. 3, the second cylinder hole 31 and the third cylinder hole 41 are arranged below the first cylinder hole 21, but the third cylinder is located on the side of the first cylinder hole 21. The hole 41 may be arranged. Further, the first cylinder hole 21 may be disposed below the second cylinder hole 31.

  In the present embodiment, as shown in FIG. 4, the second cylinder hole 31 is opened in the left side surface 10 g of the main body 10 a, but the second cylinder hole 31 is opened in the first cylinder hole 21 in the main body 10 a. It suffices if it opens to the side surface that is continuous with the surface that is running. For example, the second cylinder hole 31 may be opened on the right side surface 10h, the motor 34 may be attached to the right side surface 10h, and the control device 50 may be attached to the left side surface 10g.

  In the present embodiment, as shown in FIG. 3, the first cylinder hole 21 and the third cylinder hole 41 are opened on the rear surface 10c of the main body 10a of the base body 10, but are opened on the front surface 10b of the main body 10a. Also good. Further, the first cylinder hole 21 and the third cylinder hole 41 may be opened in the opposite directions.

  In the present embodiment, as shown in FIG. 4, the axis L2 of the second cylinder hole 31 is orthogonal to the axes L1, L3 of the first cylinder hole 21 and the third cylinder hole 41. It suffices if the axis L2 intersects L3.

In the present embodiment, as shown in FIG. 4, the motor cylinder 30 is configured by a cylinder using one piston. However, the motor cylinder may be configured by a tandem cylinder having two pistons.
In addition, when the motor cylinder 30 is comprised with the cylinder using one piston, the axial length of the 2nd cylinder hole 31 can be made small, and the motor cylinder 30 can be comprised compactly in the left-right direction.

  As shown in FIG. 1, the hydraulic pressure generating device 1 according to the present embodiment includes three devices, ie, a master cylinder 20, a motor cylinder 30, and a stroke simulator 40. Only the device may be provided.

DESCRIPTION OF SYMBOLS 1 Hydraulic pressure generator 2 Hydraulic pressure control apparatus 10 Base | substrate 10a Main body part 10f Escape part 10i Projection part 10j Projection 11a First main hydraulic pressure path 11b Second main hydraulic pressure path 12 Branch hydraulic pressure path 13 Normally closed solenoid valve 14a First communication hydraulic pressure path 14b Second communication hydraulic pressure path 14c Third communication hydraulic pressure path 15a First switching valve 15b Second switching valve 15c Normally open solenoid valve 18a First pressure sensor 18b Second pressure sensor 19 Stroke sensor 20 Master cylinder 21 First cylinder hole 21a Bottom surface 21b Opening portion 21c Bottom side pressure chamber 21d Opening side pressure chamber 22 First piston on bottom surface side 23 First piston on opening side 24 First elastic member 25 Second elastic member 26 Reservoir 30 Motor cylinder 31 Second cylinder hole 31a Bottom surface 31b Opening 31c Pressure chamber 32 Second piston 33 Elastic member 34 Motor 34a Case 35 Rod 40 Stroke simulator 41 Third cylinder hole 41a Bottom surface 41b Opening 41c Bottom side pressure chamber 41d Opening side pressure chamber 42 Third piston 43 Lid member 44 Elastic member 50 Controller 51 Housing A Vehicle brake system P Brake Pedal P1 Rod W Wheel cylinder

Claims (8)

A substrate;
A master cylinder that generates brake fluid pressure by a first piston coupled to the brake operator;
A motor cylinder that generates a brake fluid pressure by a second piston having a motor as a drive source,
The substrate is
A bottomed first cylinder hole into which the first piston is inserted;
A bottomed second cylinder hole into which the second piston is inserted,
On the rear surface of the base body, the first cylinder hole opens,
On one side surface of the base body, the second cylinder hole is opened and the motor is attached.
On the other side of the base body, which is the side opposite to the one side, a protrusion is formed and a control device for controlling the motor is attached,
The control device includes a housing that is a box in which a control board is accommodated,
The protrusion while being housed in the front KIHA Ujingu are the bottom of the second cylinder bore is formed in said projecting portion,
A hydraulic pressure generating device characterized in that a bottomed cylindrical convex portion formed by expanding a portion for accommodating the tip end portion of the protruding portion is provided on a side surface of the housing.   The first cylinder hole and the second cylinder hole are spaced apart from each other in the vertical direction, and the axes of the first cylinder hole and the second cylinder hole cross each other three-dimensionally. The fluid pressure generator described. A stroke simulator for applying a pseudo operation reaction force to the brake operator by the biased third piston;
The base has a bottomed third cylinder hole into which the third piston is inserted;
The hydraulic pressure generator according to claim 1 or 2, wherein the third cylinder hole is opened in a rear surface of the base.   The hydraulic pressure generator according to claim 3, wherein the first cylinder hole and the third cylinder hole are arranged side by side.   5. The hydraulic pressure generating device according to claim 3, wherein the second cylinder hole is disposed between the first cylinder hole and the third cylinder hole.   The hydraulic pressure generating apparatus according to any one of claims 1 to 5, wherein a part of the hydraulic pressure path is disposed on a peripheral wall portion of the protruding portion.   The hydraulic pressure generating device according to any one of claims 1 to 6, wherein a reservoir for storing brake fluid is attached to an upper surface of the base body.   The hydraulic pressure generating device according to any one of claims 1 to 7, wherein an escape portion is formed in the lower portion of the front surface of the base body by hollowing out the base body.

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