JP2016088226A - Fluid pressure generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid pressure generator that can improve layout performance in the case of using an endless transmission member.SOLUTION: A fluid pressure generator that can generate brake fluid pressure by moving a second piston by driving an electric motor 61 comprises a substrate 10 to which the electric motor 61 is attached. The fluid pressure generator comprises: a driving-side pulley 62 which connects to a rotary shaft 61b of the electric motor 61; and an output member 63 which has a center shaft L2 parallel to a center shaft L4 of the driving-side pulley 62 and drives the second piston in interlock with the driving-side pulley 62. Across the driving-side pulley 62 and the output member 63 is hung a belt 64. An electric wiring portion 74 extending from the electric motor 61 is arranged to pass through a region R surrounded by the belt 64.SELECTED DRAWING: Figure 7

Description

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

Patent Document 1 discloses a hydraulic pressure generating device capable of generating a brake hydraulic pressure by driving an electric motor in accordance with, for example, a driver's brake operation.
In the technique described in Patent Document 1, the rotational driving force of the electric motor is transmitted by a driving pulley, a driven pulley, and a belt spanning these pulleys.

JP 2009-101947 A

By the way, if a transmission mechanism using gears is employed in the hydraulic pressure generator, the adjacent gears directly mesh with each other, so that no space is generated between the drive gear and the driven gear.
However, when a transmission mechanism using a belt is employed in the hydraulic pressure generator, a space is formed between the driving pulley and the driven pulley inside the belt, so that the area occupied by the transmission mechanism is enlarged. There is a problem that the layout is not so good.

  This invention is made | formed in view of an above described situation, and makes it a subject to provide the hydraulic-pressure generator which can improve layout property, when using an endless transmission member.

  In order to solve the above problems, a hydraulic pressure generating device according to the present invention is a hydraulic pressure generating device capable of generating a brake hydraulic pressure by moving a piston by driving an electric motor, and the electric motor is fixed to the hydraulic pressure generating device. A substrate is provided. The hydraulic pressure generating device includes an input member connected to a rotation shaft of the electric motor, a center axis parallel to the center axis of the input member, and an output member that drives the piston in conjunction with the input member. And comprising. An endless transmission member is bridged between the input member and the output member. And the electrical wiring part extended from the said electric motor is arrange | positioned through the area | region enclosed by the said transmission member.

  In this configuration, the electric wiring portion extending from the electric motor is disposed so as to pass through a region between the input member and the output member inside the endless transmission member. For this reason, in the hydraulic pressure generator having a configuration in which the transmission member is bridged between the input member and the output member, the electric wiring portion extending from the electric motor is efficiently utilized by utilizing the space formed inside the transmission member. Can be laid out.

  In the hydraulic pressure generating device, the electrical wiring portion is disposed on a straight line connecting the central axis of the input member and the central axis of the output member when viewed from a direction parallel to the central axis of the output member. Good.

  In this configuration, since the electrical wiring portion is arranged on a straight line connecting the central axis of the input member and the central axis of the output member when viewed from a direction parallel to the central axis of the output member, the input member and the output member The electrical wiring portion can be laid out in a well-balanced manner. Further, interference between the endless transmission member and the electric wiring portion extending from the electric motor can be avoided more reliably.

  In the hydraulic pressure generator, the electrical wiring section may include at least one of a power supply member that supplies power to the electric motor and a signal line that transmits a signal related to the operation of the electric motor.

  In this configuration, the electrical wiring portion includes at least one of a power feeding member and a signal line. Therefore, at least one of the power supply member and the signal line is disposed so as to pass through a region between the input member and the output member inside the endless transmission member, and a space formed inside the transmission member is formed. It can be used and laid out efficiently.

  In the hydraulic pressure generator, the electric motor may be disposed on one side of the base, and a control device for controlling the electric motor may be disposed on the other side of the base. The electrical wiring portion may be inserted into a through hole formed through the base body and electrically connected to the control device.

  In this configuration, since the electric wiring portion is inserted into the through hole formed in the base body, the electric wiring portion for connecting the electric motor disposed on the one surface side of the base body and the control device disposed on the other surface side of the base body is provided. Can be laid out to connect easily and reliably.

  In the hydraulic pressure generating device, the base is provided with a master cylinder that generates brake hydraulic pressure by a driver's brake operation and a slave cylinder that generates brake hydraulic pressure by driving the electric motor. Good. The base may be provided with a switching valve that switches between a state in which the master cylinder communicates with the wheel cylinder and a state in which the master cylinder is blocked from the wheel cylinder. The present invention is preferably used for such a hydraulic pressure generator.

  ADVANTAGE OF THE INVENTION According to this invention, when using an endless transmission member, the hydraulic pressure generator which can improve layout property can be provided.

It is the schematic diagram which showed the brake system for vehicles using the hydraulic-pressure generator which concerns on one Embodiment of this invention. It is the side view which looked at the hydraulic pressure generator concerning this embodiment from the right. It is a top view of the hydraulic pressure generator concerning this embodiment. It is the side view which looked at the hydraulic-pressure generator concerning this embodiment from the left. It is the figure which showed the hydraulic-pressure generator concerning this embodiment, and is AA sectional drawing of FIG. It is the figure which showed the hydraulic-pressure generator which concerns on this embodiment, and is BB sectional drawing of FIG. It is the figure which showed the hydraulic-pressure generator concerning this embodiment, and is CC sectional drawing of FIG.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
Note that, in the drawings shown below, the same members or corresponding members are denoted by the same reference numerals, and redundant description is omitted as appropriate.

  FIG. 1 schematically shows the overall configuration of the vehicle brake system 100. The arrangement of the members shown in FIG. 1 is different from the arrangement of the members shown in FIGS.

  As shown in FIG. 1, the vehicle brake system 100 operates when a prime mover (such as an engine or an electric motor for traveling) is activated, and when the prime mover is stopped. It is equipped with both hydraulic brake systems.

The vehicle brake system 100 includes a hydraulic pressure generating device 1 and a hydraulic pressure control device 2. The hydraulic pressure generator 1 can generate the brake hydraulic pressure by moving the second piston 32 (piston) by driving the electric motor 61 in accordance with, for example, the driver's operation (brake operation) of the brake pedal P. . The hydraulic pressure control device 2 supports stabilization of vehicle behavior.
The vehicle brake system 100 is a vehicle that uses only an engine (internal combustion engine) as a power source, a hybrid vehicle that uses both the engine and a traveling electric motor, and an electric vehicle and fuel that uses only a traveling electric motor as a power source. It can also be installed in battery cars.

The hydraulic pressure generator 1 includes a base body 10, an electric motor 61 (see FIGS. 3 and 4) disposed on one side of the base 10 in the left-right direction (here, the left side), and the other side of the base 10 in the left-right direction. And a control device 50 (see FIGS. 2 and 3) disposed on the side (here, the right side).
The base body 10 is provided with a master cylinder 20, a slave cylinder 30, a first switching valve 15a and a second switching valve 15b (hereinafter also referred to as “switching valves 15a and 15b”), and a stroke simulator 40. Yes.

  The master cylinder 20 generates a brake fluid pressure by a driver's brake operation. The slave cylinder 30 generates brake fluid pressure by driving the electric motor 61. The switching valves 15 a and 15 b can switch between a state in which the master cylinder 20 communicates with the wheel cylinder W and a state in which the master cylinder 20 is disconnected from the wheel cylinder W. The stroke simulator 40 applies an operation reaction force to the brake pedal P.

  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. The hydraulic pressure generator 1 is disposed in front of the brake pedal P, and the rear surface 10d of the base body 10 of the hydraulic pressure generator 1 faces the brake pedal P. 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) (FIGS. 2 to 2). 4). Furthermore, the direction perpendicular to the moving direction (front-rear direction) of the rod P1 is defined as the left-right direction (see FIG. 3).

  The base 10 is a metal component mounted on a vehicle (see FIGS. 2 to 4), and includes a substantially rectangular parallelepiped main body 10a. As shown in FIG. 3, the base body 10 includes a cover 10 b (see FIG. 4) fixed to the left side surface 10 g of the main body 10 a by a plurality of screw members 81.

  As shown in FIG. 1, 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. Various components such as a reservoir 26 are attached to the base 10. Moreover, the rod P1 is arrange | positioned at the rear surface 10d side of the base | substrate 10 (refer FIGS. 2-4).

  As shown in FIG. 2, the right side surface 10 h of the main body 10 a has a normally closed solenoid valve 13, switching valves 15 a and 15 b, and a normally open solenoid valve 15 c (hereinafter, “solenoid valves 13, 15 a, 15 b and 15 c” (Also called) is attached. Furthermore, a stroke sensor 19, a first pressure sensor 18a and a second pressure sensor 18b (hereinafter also referred to as “pressure sensors 18a and 18b”), and a control device 50 are attached to the right side surface 10h of the main body 10a. ing.

2 and 3, the control device 50 is indicated by an imaginary line in order to show the arrangement of the stroke sensor 19, the electromagnetic valves 13, 15a, 15b, and 15c and the pressure sensors 18a and 18b.
The stroke sensor 19, the electromagnetic valves 13, 15a, 15b, and 15c and the pressure sensors 18a and 18b are mounted in a plurality of mounting holes 10m, 10n, and 10q that are open on the right side surface of the main body 10a.

Further, as shown in FIG. 3, a cylindrical projecting portion 10i projects from the right side surface 10h of the main body portion 10a. The protruding portion 10i is provided at the lower portion on the front side of the right side surface 10h (see FIG. 2) 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. 5, the first cylinder hole 21 is a bottomed cylindrical hole. The central 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 10d of the main body portion 10a.

As shown in FIG. 6, the second cylinder hole 31 is a bottomed cylindrical hole that is spaced below the first cylinder hole 21. The central axis L2 of the second cylinder hole 31 extends in the left-right direction and intersects the central axis L1 of the first cylinder hole 21 (see FIG. 3). The second cylinder hole 31 opens in the left side surface 10g of the main body 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. 5, the third cylinder hole 41 is a bottomed cylindrical hole that is spaced apart below the first cylinder hole 21 and the second cylinder hole 31. The central axis L3 of the third cylinder hole 41 is parallel to the central axis L1 of the first cylinder hole 21. The third cylinder hole 41 opens in the rear surface 10d 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 central axis L1 of the first cylinder hole 21 and the central axis L3 of the third cylinder hole 41 are projected onto a horizontal plane passing through the central axis L2 of the second cylinder hole 31, the central axis L2 of the second cylinder hole 31 is It is orthogonal to the central axis L1 of the first cylinder hole 21 and the central axis L3 of the third cylinder hole 41 (see FIG. 3). That is, as shown in FIG. 6, the central axis L2 of the second cylinder hole 31 is orthogonal to the plane S1 including the central axis L1 of the first cylinder hole 21 and the central axis L3 of the third cylinder hole 41. Yes.

  As shown in FIG. 5, the master cylinder 20 includes two first pistons 22 and 23 (secondary piston and primary piston) inserted into the first cylinder hole 21 and two first pistons 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 rod P1 of the brake pedal P (see FIG. 1) is inserted into the first cylinder hole 21 through the opening 21b. The front end (front end) of the rod P1 is connected to the rear end of the first piston 23 on the opening 21b side. Thereby, the first piston 23 on the opening 21b side is connected to the brake pedal P via the rod P1. The first pistons 22 and 23 slide in the first cylinder hole 21 in response to the depression force of the brake pedal P, and pressurize the brake fluid in the bottom side pressure chamber 21c and the opening side pressure chamber 21d.

As shown in FIG. 1, a reservoir 26 is connected to the first cylinder hole 21. The reservoir 26 is a container that stores brake fluid, and is attached to the upper surface 10e of the main body 10a. Two liquid supply portions 26a and 26a projecting from the lower surface of the reservoir 26 are inserted into two reservoir union ports 17 and 17 formed on the upper surface 10e 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. 6, the slave cylinder 30 includes a second piston 32 inserted into the second cylinder hole 31 and an elastic member 33 accommodated in the second cylinder hole 31.
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.

  The electric motor 61 is an electric servo motor that is driven and controlled by the control device 50. The electric motor 61 is fixed to the left side surface of the cover 10 b of the base body 10. The electric motor 61 has a mounting flange 61a, and a plurality of through holes (not shown) through which a screw member 82 as a fastening member such as a bolt is inserted are formed in the flange 61a. On the other hand, a plurality of screw holes 83 are formed in the cover 10b. The electric motor 61 is fixed to the cover 10b by fastening the screw member 82 to the cover 10b, that is, by inserting the screw member 82 through the through hole of the flange 61a and screwing it into the screw hole 83 of the cover 10b. That is, the electric motor 61 and the cover 10b of the base body 10 are fixed (screwed) by screw fastening using a plurality of screw members 82.

  In a space formed between the main body 10a of the base body 10 and the cover 10b of the base body 10, a driving pulley 62 as an input member, an output member 63, and a belt 64 (endless transmission member) are arranged. Has been. That is, the cover 10 b covers the driving pulley 62, the output member 63, and the belt 64.

  The driving pulley 62 is connected to the rotating shaft 61 b of the electric motor 61. The driving pulley 62 is fixed to the rotating shaft 61b by using a fixing means (not shown) such as a key or a set screw. A belt 64 is wound around the driving pulley 62. The output member 63 has a central axis L <b> 2 parallel to the central axis L <b> 4 of the drive side pulley 62, and drives the second piston 32 in conjunction with the drive side pulley 62. Here, the output member 63 has a central axis L2 common to the second cylinder hole 31. The belt 64 is stretched over the driving pulley 62 and the output member 63 (see FIG. 7). That is, the driving pulley 62 as the input member and the output member 63 are connected by the belt 64 so as to be able to transmit the rotational driving force.

  The output member 63 includes a driven pulley 65 (rotating wheel) and a conversion mechanism 66. A belt 64 is wound around the driven pulley 65. The rotational driving force of the driving pulley 62 is transmitted to the driven pulley 65 via the belt 64. The conversion mechanism 66 converts the rotational driving force of the driven pulley 65 into a linear driving force along the axial direction of the second piston 32.

  As shown in FIG. 7, the driven pulley 65 of the output member 63 is disposed in the lower part on the front side in the cover 10 b of the base body 10, and the driving pulley 62 is the upper part on the rear side in the cover 10 b of the base body 10. Is arranged. In this manner, the driving pulley 62 and the driven pulley 65 can be arranged by effectively using the space in the cover 10b. In addition, the electric motor 61, the driving pulley 62, the output member 63, and the slave cylinder 30 can be arranged with a good balance with respect to the base body 10.

  Here, for example, the belt 64 is an endless toothed belt having a band shape and made of an elastic member such as rubber. The belt 64 has belt teeth (not shown) engaged with and engaged with teeth (not shown) of the driving pulley 62 and teeth (not shown) of the driven pulley 65 on the inner peripheral surface. The driving pulley 62 has a smaller diameter (number of teeth) than the driven pulley 65. That is, the transmission mechanism using the belt 64 constitutes a speed reduction mechanism.

  The electric motor 61 is fixed to the cover 10 b of the base body 10 by a plurality of screw members 82. One of the plurality of screw members 82 is disposed in a region R surrounded by the belt 64. That is, the region R is a region between the driving pulley 62 and the driven pulley 65 inside the belt 64.

  Further, the screw member 82 disposed in the region R has a central axis L4 of the driving pulley 62 and a central axis L2 of the driven pulley 65 (output member 63) as viewed from a direction parallel to the central axis L2 of the output member 63. It is preferable to arrange on a straight line S2 connecting

  As described above, in the present embodiment, one of the plurality of screw members 82 is disposed in the region R, but any of the plurality of screw members 82 may be disposed outside the region R. In addition, two or more of the plurality of screw members 82 may be arranged in the region R. In the present embodiment, the electric motor 61 is fixed to the base body 10 by four screw members 82. However, the number of the screw members 82 used for fixing the electric motor 61 is not particularly limited. For example, three may be sufficient.

  As shown in FIG. 6, the surface 10u facing the main body 10a of the cover 10b is provided with a built-up portion 10v (see FIG. 7) that protrudes toward the main body 10a at the position where the screw member 82 is fastened. Yes. Therefore, the screw hole 83 is formed in the built-up portion 10v of the cover 10b. The build-up portion 10v is provided so as to overlap (overlap) the belt 64 when viewed from the direction perpendicular to the central axis L2 of the output member 63.

  The conversion mechanism 66 is screwed (engaged) with a nut member 67 (rotating member) that rotates by receiving the rotational driving force of the driven pulley 65 and a ball 68 that can roll, and is turned into a shaft. A ball screw mechanism including a screw shaft 69 (linear motion member) provided to be movable in a direction. When the rotational driving force of the electric motor 61 is input to the conversion mechanism 66, a linear driving force along the axial direction of the second piston 32 is applied to the screw shaft 69, and the screw shaft 69 moves back and forth in the left-right direction. .

  A cylindrical rotation prevention pin 84 for preventing rotation of the screw shaft 69 is fixed to the screw shaft 69 by being press-fitted into a through hole formed in the screw shaft 69, for example. The anti-rotation pins 84 are positioned so that both ends thereof project substantially uniformly from the outer peripheral surface of the screw shaft 69 outward in the radial direction. On the other hand, a cylindrical anti-rotation sleeve 85 having a sliding groove 86 formed on the inner peripheral surface thereof is assembled and mounted in a bulging portion 10r described later of the cover 10b. The sliding groove 86 accommodates the tip end portion of the detent pin 84 and supports it so as to be movable with respect to the axial direction of the screw shaft 69. The anti-rotation sleeve 85 is assembled in a non-rotatable manner with respect to the cover 10b by, for example, spline fitting in the bulging portion 10r. The screw shaft 69 can be moved back and forth in the axial direction without rotating by the rotation preventing mechanism including the rotation preventing pin 84 and the rotation preventing sleeve 85. However, the rotation prevention mechanism of the screw shaft 69 is not limited to the above-described configuration, and for example, a slide key may be used.

  As described above, in this embodiment, a ball screw mechanism is employed as the conversion mechanism 66, but the present invention is not limited to this, and for example, a feed screw in which a nut member and a screw shaft are directly screwed together. A mechanism may be employed.

  A bulging portion 10r is formed on the left side surface of the cover 10b. The bulging portion 10r is a bottomed cylindrical portion and has a space for accommodating the rear end portion (left end portion) of the screw shaft 69. That is, only a portion necessary for accommodating the rear end portion of the screw shaft 69 is expanded without increasing the thickness of the entire cover 10b (base 10) in the left-right direction.

  The driven pulley 65 has an engaging portion 65 a that engages with the belt 64, and a fixing portion 65 b that is fixed to the nut member 67 of the conversion mechanism 66. The engaging portion 65a has a cylindrical shape, and teeth (not shown) are formed on the outer peripheral surface. The fixed portion 65b has a disk shape and is connected to the inner peripheral surface of the engaging portion 65a. The engaging portion 65a and the fixing portion 65b are integrally formed here, but may be formed separately and joined by welding or the like.

  The fixing portion 65b is fixed to the nut member 67 using, for example, a key 72. That is, the fixing portion 65b and the nut member 67 are coupled so as not to be relatively rotatable. However, the fixing of the fixing portion 65b to the nut member 67 is not limited to fixing by the key 72, and may be fixing by press-fitting or welding, for example.

  In the driven pulley 65, the fixed portion 65b is formed to have a smaller dimension in the axial direction (direction of the central axis L2) than the engaging portion 65a. Here, the dimension in the axial direction of the engaging portion 65 a is formed substantially equal to the width of the belt 64. That is, the axial width (engagement width) in which the belt 64 engages with the driving pulley 62 and the driven pulley 65 is substantially equal to the axial dimension (width of the belt 64) of the engaging portion 65a. On the other hand, the dimension in the axial direction of the fixed portion 65 b is smaller than the width of the belt 64.

  The output member 63 is rotatably supported with respect to the base body 10 by bearing members 71a and 71b. The belt 64 is disposed so as to overlap (overlap) the bearing members 71a and 71b as viewed from a direction perpendicular to the central axis L2 of the output member 63. In other words, at least a part of the bearing members 71a and 71b enters the inner space of the belt 64 (the region surrounded by the belt 64). That is, the width of the belt 64 is larger than the separation distance between the bearing member 71a and the bearing member 71b.

  In this embodiment, the bearing member 71a and the bearing member 71b are arrange | positioned at the axial direction both sides of the fixing | fixed part 65b of the driven pulley 65, respectively. The belt 64 is disposed so as to overlap with at least a part of each of the two bearing members 71a and 71b when viewed from a direction perpendicular to the central axis L2 of the output member 63.

  As described above, in the present embodiment, the two bearing members 71a and 71b that support the output member 63 are installed on the base body 10, but the number of installed bearing members is not particularly limited. For example, it may be three or more.

  Further, as described above, in the present embodiment, the belt 64 is disposed so as to overlap both the two bearing members 71a and 71b and the direction perpendicular to the central axis L2 of the output member 63. It is not limited to this. The belt 64 may be arranged so as to overlap with one of the two bearing members 71a and 71b and the direction perpendicular to the central axis L2 of the output member 63. That is, the belt 64 is configured to be disposed so as to overlap with at least a part of at least one of the plurality of bearing members 71a and 71b when viewed from the direction perpendicular to the central axis L2 of the output member 63. It may be.

  The inner ring of one of the two bearing members 71a and 71b is press-fitted into the outer peripheral surface of the nut member 67 on the main body 10a side. The fixed portion 65b of the driven pulley 65 is in contact with and sandwiched between an annular convex portion 67a formed to project radially outward from the outer peripheral surface of the nut member 67 and the bearing member 71a. Thereby, the driven pulley 65 is positioned in the axial direction.

  The other bearing member 71b of the two bearing members 71a and 71b is press-fitted into the outer peripheral surface of the nut member 67 on the cover 10b side. The end surface (right end surface) of the bearing member 71b on the main body portion 10a side is in contact with the convex portion 67a.

  The bearing member 71a is disposed in a mounting hole portion 10s formed to be opened in the left side surface 10g of the main body portion 10a. And the bearing member 71b is arrange | positioned in the attachment hole 10t formed in the peripheral part of the opening end of the bulging part 10r in the cover 10b of the base | substrate 10. As shown in FIG. That is, the cover 10b supports the bearing member 71b while being disposed inside.

  Here, ball bearings are used as the bearing members 71a and 71b. However, the present invention is not limited to this, and other types of bearing members such as tapered roller bearings may be used.

  The screw shaft 69 is inserted into the second cylinder hole 31 from the opening 31b. The tip end of the screw shaft 69 is in contact with the second piston 32. When the screw shaft 69 moves to the second piston 32 side (here, to the right), the second piston 32 receives the linear driving force input from the screw shaft 69 and slides in the second cylinder hole 31. To pressurize the brake fluid in the pressure chamber 31c.

  As shown in FIG. 5, 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 path formed in the main body 10a of the base body 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. That is, the first cylinder hole 21 of the master cylinder 20 and the third cylinder hole 41 of the stroke simulator 40 communicate with each other via the second main hydraulic pressure path 11 b and the branch hydraulic pressure path 12.
Further, a normally closed electromagnetic valve 13 is provided in the branch hydraulic pressure path 12. The normally closed solenoid valve 13 is a solenoid valve capable of blocking the communication state between the first cylinder hole 21 and the third cylinder hole 41.

  The third communication hydraulic pressure path 14 c is a hydraulic pressure path starting from the second cylinder hole 31 of the slave cylinder 30. As shown in FIG. 6, a part of the third communication hydraulic pressure path 14 c is disposed in the ridge 10 j of the protrusion 10 i. 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 path 11a, a first switching valve 15a, which is a two-position three-port three-way valve, is provided at a portion connected to the first communication hydraulic pressure path 14a. The first switching valve 15a is attached to a mounting hole 10n (see FIG. 2) for the electromagnetic valve that communicates with the first main hydraulic pressure passage 11a.
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 attached to a mounting hole 10n (see FIG. 2) for the electromagnetic valve that communicates with the second main hydraulic pressure passage 11b.
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 normally open type electromagnetic valve 15c is attached to a mounting hole 10n (see FIG. 2) for the electromagnetic valve that communicates with the first communication hydraulic pressure path 14a.

  The two pressure sensors 18a and 18b detect the magnitude of the brake fluid pressure, and are attached to pressure sensor mounting holes 10q and 10q (see FIG. 2) leading to the main fluid pressure paths 11a and 11b. . Information acquired by both pressure sensors 18a and 18b is output to the control device 50 (see FIG. 2).

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 slave cylinder The brake fluid pressure generated at 30 is detected.

The stroke sensor 19 is a magnetic sensor that magnetically detects the position of the rod P1 of the brake pedal P.
As shown in FIG. 2, the stroke sensor 19 is attached to an attachment hole 10 m for the stroke sensor formed on the right side surface 10 h of the main body portion 10 a of the base body 10.
A magnet (not shown) is attached to the rod P1. The stroke sensor 19 detects the position of the rod P1 by detecting the fluctuation of the magnetic field due to the movement of the rod P1. Further, the stroke sensor 19 outputs a detection signal indicating the position of the rod P <b> 1 to the control device 50. 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. 2 and 3, 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 53 (see FIG. 6) is accommodated in the housing 51. The control board 53 is obtained by attaching an electronic component (not shown) such as a semiconductor chip to a board body on which an electronic circuit (not shown) is printed. The control board 53 is formed in a shape that does not interfere with the protruding portion 10i of the main body portion 10a.

  The housing 51 accommodates a stroke sensor 19 projecting from the right side surface 10h of the main body 10a, the solenoid valves 13, 15a, 15b, and 15c, and both pressure sensors 18a and 18b.

  Further, the housing 51 accommodates a 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 board 53 (see FIG. 6) of the control device 50 stores information obtained from various sensors such as the pressure sensors 18a and 18b and the stroke sensor 19 or a program stored in advance. Based on this, the operation of the electric motor 61, the opening and closing of the normally closed solenoid valve 13, the opening and closing of the normally open solenoid valve 15c, and the switching of both switching valves 15a and 15b are controlled.

  As shown in FIGS. 6 to 7, the electric wiring portion 74 extending from the electric motor 61 is disposed through a region R (see FIG. 7) surrounded by the belt 64. The electrical wiring portion 74 connects the electric motor 61 and the control device 50.

  The electrical wiring portion 74 is inserted into a through hole 75 formed through the main body portion 10 a of the base body 10 and is electrically connected to the control device 50. More specifically, the electric wiring portion 74 extending from the electric motor 61 passes through the region R and the through hole 75 to reach a connection portion provided in the housing 51 of the control device 50, and is not shown extending from the connection portion. It is electrically connected to the control board 53 of the control device 50 through wiring.

  The electrical wiring portion 74 includes a power supply member that supplies power to the electric motor 61. In the present embodiment, the electric wiring portion 74 also includes a signal line that transmits a signal related to the operation of the electric motor 61, and this signal line is provided in parallel with the power feeding member. The signal line is also disposed through a region R surrounded by the belt 64. The signal line transmits, for example, a signal detected by a rotation angle sensor (not shown) that detects the rotation angle of the electric motor 61 to the control device 50. However, the electrical wiring portion 74 only needs to include at least one of the power feeding member and the signal line. When only one of the power supply member and the signal line is included in the electrical wiring portion 74, the other is laid out separately from the electrical wiring portion 74.

As shown in FIG. 1, the hydraulic pressure control device 2 performs 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. The structure which can be performed is provided and is connected to each wheel cylinder W via piping.
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 100 will be described.
As shown in FIG. 1, in the vehicle brake system 100, when the ignition switch 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.

  Further, when the depression of the brake pedal P is detected by the stroke sensor 19, the electric motor 61 is driven, and the rotational driving force of the electric motor 61 is transmitted to the output member 63 via the driving pulley 62 and the belt 64. The The output member 63 drives the second piston 32 of the slave cylinder 30 by moving the screw shaft 69 forward and backward. And the brake fluid in the pressure chamber 31c is pressurized by the 2nd piston 32 of the slave cylinder 30 moving to the bottom face 31a side.

  The control device 50 detects the brake fluid pressure output from the slave cylinder 30 (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 revolutions of the electric motor 61 is 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 in a state where the second piston 32 of the slave cylinder 30 receives an input from the screw shaft 69, a normally open solenoid valve is used. 15c 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 slave cylinder 30 does not operate (for example, when power cannot be obtained), the first switching valve 15a communicates the upstream side and the downstream side of the first main hydraulic pressure path 11a while 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 generating apparatus 1 according to the present embodiment described above, the electric wiring portion 74 extending from the electric motor 61 has a driving pulley 62 and an output member 63 as input members inside the belt 64 as shown in FIG. It is arrange | positioned so that the area | region R between may pass. For this reason, in the hydraulic pressure generator 1 having a configuration in which the belt 64 is bridged between the driving pulley 62 and the driven pulley 65 of the output member 63, the electric wiring portion 74 extending from the electric motor 61 is disposed inside the belt 64. An efficient layout can be made by utilizing the formed space.

  Further, in the hydraulic pressure generating device 1, when viewed from a direction parallel to the central axis L2 of the output member 63, a straight line S2 connecting the central axis L4 of the driving pulley 62 as the input member and the central axis L2 of the output member 63 is shown. An electrical wiring portion 74 is disposed on the surface. For this reason, the drive side pulley 62, the output member 63, and the electric wiring part 74 as an input member can be laid out in good balance. Further, interference between the belt 64 and the electric wiring portion 74 extending from the electric motor 61 can be avoided more reliably.

  Moreover, in the hydraulic pressure generator 1, the electrical wiring part 74 includes at least one of a power feeding member and a signal line. For this reason, at least one of the power supply member and the signal line is disposed so as to pass through a region R between the drive side pulley 62 and the output member 63 as an input member inside the belt 64, and inside the belt 64. An efficient layout can be made by utilizing the formed space.

  As shown in FIG. 6, in the hydraulic pressure generating device 1, the electrical wiring portion 74 is inserted through a through hole 75 formed in the main body portion 10 a of the base body 10. Therefore, the electric motor 61 disposed on the left surface side of the base body 10 and the control device 50 disposed on the right surface side of the base body 10 can be laid out so as to be easily and reliably connected by the electric wiring portion 74.

  As shown in FIG. 1, the base 10 of the hydraulic pressure generator 1 is provided with a master cylinder 20, a slave cylinder 30, and switching valves 15a and 15b. The present invention is preferably used for the hydraulic pressure generator 1 having such a configuration.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to the structure described in the said embodiment, The combination thru | or selecting suitably the structure described in the said embodiment is included. The configuration can be changed as appropriate without departing from the spirit of the invention. In addition, a part of the configuration of the embodiment can be added, deleted, and replaced.

  For example, as shown in FIG. 7, in the above-described embodiment, the driven pulley 65 is disposed in the lower part on the front side in the cover 10b, and the driving pulley 62 is disposed in the upper part on the rear side in the cover 10b. However, the present invention is not limited to this. The positions of the driven pulley 65 and the driving pulley 62 in the cover 10b can be arbitrarily set. For example, the driven pulley 65 may be arranged in the lower part on the rear side in the cover 10b, and the driving pulley 62 may be arranged in the upper part on the front side in the cover 10b.

  In contrast to the above-described embodiment shown in FIG. 3, the electric motor 61 may be arranged on the right side of the base body 10, and the control device 50 may be arranged on the left side of the base body 10. .

  Moreover, the installation positions of the electromagnetic valves 13, 15a, 15b, 15c and the pressure sensors 18a, 18b shown in FIG. 2 are merely examples, and are not particularly limited.

  Moreover, the installation position, installation direction, and opening direction of each cylinder hole 21, 31, and 41 shown in FIGS. 5-6 are examples, and are not specifically limited.

  Further, as shown in FIG. 1, in the above-described embodiment, the slave cylinder 30 is configured by a cylinder using one piston, but the slave cylinder is configured by a tandem type cylinder having two pistons. Also good.

  Moreover, although the hydraulic pressure generator 1 of above-described embodiment is provided with three, the master cylinder 20, the slave cylinder 30, and the stroke simulator 40, this invention is not limited to this. For example, the hydraulic pressure generating device may include only the master cylinder 20 and the slave cylinder 30 or may include only the slave cylinder 30, and the hydraulic pressure control device 2 may be combined. It may be.

DESCRIPTION OF SYMBOLS 1 Hydraulic pressure generator 2 Hydraulic pressure control apparatus 10 Base | substrate 10a Main-body part 10b Cover 20 Master cylinder 30 Slave cylinder 31 2nd cylinder hole 32 2nd piston (piston)
DESCRIPTION OF SYMBOLS 50 Control apparatus 51 Housing 53 Control board 61 Electric motor 61b Rotating shaft 62 Drive side pulley (input member)
63 Output member 64 Belt (endless transmission member)
65 Driven pulley 74 Electric wiring section (feeding member, signal line)
75 Through-hole 100 Brake system for vehicle L2 Center axis of output member L4 Center axis of driving pulley (input member) P Brake pedal R region S2 Plane W Wheel cylinder

Claims (5)

A hydraulic pressure generating device capable of generating a brake hydraulic pressure by moving a piston by driving an electric motor,
A base to which the electric motor is fixed;
An input member connected to the rotating shaft of the electric motor;
An output member having a central axis parallel to the central axis of the input member and driving the piston in conjunction with the input member;
An endless transmission member spanned between the input member and the output member;
An electrical wiring portion extending from the electric motor,
The hydraulic pressure generator according to claim 1, wherein the electrical wiring portion is disposed through a region surrounded by the transmission member.   The electrical wiring portion is arranged on a straight line connecting the central axis of the input member and the central axis of the output member when viewed from a direction parallel to the central axis of the output member. The hydraulic pressure generator according to 1.   The said electrical wiring part contains at least one of the electric power feeding member which supplies electric power to the said electric motor, and the signal wire | line which transmits the signal regarding the operation | movement of the said electric motor, The Claim 1 or Claim 2 characterized by the above-mentioned. Hydraulic pressure generator. The electric motor is disposed on one side of the base, and a control device for controlling the electric motor is disposed on the other side of the base.
The electrical wiring part is inserted into a through-hole formed through the base body and is electrically connected to the control device. The hydraulic pressure generator according to item. In the substrate,
A master cylinder that generates brake fluid pressure by the driver's brake operation;
A slave cylinder that generates brake fluid pressure by driving the electric motor;
The switching valve for switching between a state in which the master cylinder communicates with the wheel cylinder and a state in which the master cylinder is disconnected from the wheel cylinder is provided. The hydraulic pressure generator according to one item.

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