JP6351166B2 - Brake fluid pressure control unit - Google Patents

Description

  The present invention relates to a hydraulic control unit for a brake device in which a master cylinder is integrated.

  In recent years, an ABS (Anti-lock Brake System) hydraulic control unit that does not use an electric motor has been developed (see, for example, Patent Document 1).

  In the hydraulic pressure control unit described in Patent Document 1, a unit block having a hydraulic circuit formed therein is integrated with a master cylinder that is operated by an operation lever (operator) to generate hydraulic pressure. In addition, a discharge port connected to the brake caliper, a reserve tank for the master cylinder, and a reservoir for ABS are provided. Further, the hydraulic circuit in the unit block is interposed between the master cylinder and the discharge port, and supplies a control valve for controlling the flow of brake fluid supplied from the master cylinder to the brake caliper, the discharge port, and the ABS. And a discharge-side control valve that is interposed between the reservoirs for controlling the flow of the brake fluid flowing into the reservoir from the brake caliper.

  The supply side control valve and the discharge side control valve built in the unit block are constituted by electromagnetic valves controlled by a controller. The controller controls the supply side control valve and the discharge side control valve when the sensor detects wheel slip during operation of the control lever, thereby reducing, holding, and Increases pressure, thereby suppressing wheel slip. Further, the re-pressurization at the time of ABS operation is performed by the operation of the master cylinder by increasing the grip of the operation lever.

JP 2009-234502 A

  Incidentally, in the hydraulic pressure control unit described in Patent Document 1, a master cylinder is provided substantially horizontally below a reserve tank above the unit block, and a supply side control valve and a discharge side control valve are provided below the master cylinder. Are arranged substantially horizontally and in parallel with each other. In this hydraulic pressure control unit, the supply-side control valve and the discharge-side control valve are centrally arranged close to the lower side of the master cylinder, so that the entire unit block can be reduced in size. However, in this hydraulic pressure control unit, the supply side control valve and the discharge side control valve are arranged in parallel on the lower side of the master cylinder, so that the occupied space in the width direction by these increases. For this reason, when the hydraulic pressure control unit is installed on the handlebar as in the front brake, there is no particular problem because there is room for the surrounding space. When the control unit is installed on the side of an engine block, a swing unit or the like, there is a concern that the unit block easily interferes with surrounding parts and restricts the layout of the surrounding parts.

  Accordingly, the present invention is intended to provide a hydraulic control unit for a brake device that can reduce the thickness of a unit block and increase the degree of freedom of component layout when mounted on a vehicle.

In order to solve the above problems, the hydraulic pressure control unit of the brake device according to the present invention is operated by the operating element (10) to generate hydraulic pressure and supply a brake fluid to the brake caliper (12) (21 ), A reservoir (23) for retracting brake fluid of the brake caliper (12) when wheel slip is detected, and the master cylinder (21) through the external brake pipe (39), the brake caliper A main passage (40) connected to (12), a normally-open supply side control valve (25) provided in the main passage (40) for controlling the flow of brake fluid flowing through the main passage (40), A reserve passage (44) branched from the supply side control valve (25) of the main passage (40) from the brake caliper (12) side and connected to the reservoir (23); The reserve path (44) to provided the reserve path (44) normally closed discharge-side control valve for controlling the flow of the brake fluid flowing (26), wherein the master cylinder (21), the supply-side control the valve (25), and the discharge in the hydraulic pressure control unit in which the discharge-side control valve (26) is provided integrally with the unit block (27), said master cylinder (21) and the supply-side control valve (25) The side control valve (26) is such that each of these axial centers (o1, o2, o3) is positioned in a virtual flat plate block (V) having a thickness substantially the same as the diameter of the master cylinder (21). It was arranged in the unit block (27), and the thickness direction of the virtual flat plate block (V) was along the vehicle width direction .

  Thus, the master cylinder (21) and the supply-side control valve are arranged so that the shaft center portion (o1, o2, o3) is positioned in the virtual flat plate block (V) having the same thickness as the diameter of the master cylinder (21). Since (25) and the discharge side control valve (26) are disposed in the unit block (27), they do not occupy a large space in the thickness direction of the unit block (27). Therefore, the unit block (27) can be thinned, and the unit block (27) is less likely to interfere with surrounding components when mounted on the vehicle.

The reservoir (23) may also serve as a reserve tank for a master cylinder that replenishes the master cylinder (21) with brake fluid.
In this case, since the reservoir (23) for retracting the brake fluid of the brake caliper (12) when the wheel slip is detected also serves as a reserve tank for the master cylinder, the number of parts is reduced and the entire apparatus is reduced in size and weight. And product cost can be reduced.

A valve housing hole (42) of the supply-side control valve (25) and a valve housing hole (43) of the discharge-side control valve (26) are arranged in the unit block so as to be substantially orthogonal to the master cylinder (21). 27).
In this case, the unit block (27) can be prevented from becoming large in the front-rear direction, and the passage in the unit block (27) can be prevented from becoming complicated.

The master cylinder (21), wherein the passages of the unit block (27) connected to the brake caliper (12) side (40b), said to be directed in a substantially vertical direction in a vehicle mounted state unit block (27 ) Is desirable.
In this case, since the master cylinder (21) and the passage (40b) are attached to the vehicle in a state of being substantially vertically upward, the air can easily escape to the outside through the passage (40b), and the air enters the unit block (27). It becomes difficult to stay.

The reservoir (23) may be provided separately from the unit block (27).
In this case, since the reservoir (23) is provided outside the unit block (27), the entire unit block (27) can be further miniaturized and the mountability to the vehicle can be improved.

  According to the present invention, since the master cylinder, the supply side control valve, and the discharge side control valve do not occupy a large space in the thickness direction of the unit block, the unit block is thinned and the degree of freedom of component layout when mounted on the vehicle Can be increased.

1 is a left side view of a part of a motorcycle showing an arrangement of a brake device according to an embodiment of the present invention. 1 is a top view of a part of a motorcycle showing an arrangement of a brake device according to an embodiment of the present invention. It is sectional drawing corresponding to the III-III cross section of FIG. 1 which shows arrangement | positioning of the brake device of embodiment of this invention. It is sectional drawing corresponding to the IV-IV cross section of FIG. 3 of the hydraulic control unit of 1st Embodiment of this invention. It is the perspective view which showed typically the components arrangement | positioning of the hydraulic control unit of 1st Embodiment of this invention. It is sectional drawing corresponding to FIG. 4 of 1st Embodiment of the hydraulic-pressure control unit of 2nd Embodiment of this invention. It is sectional drawing corresponding to FIG. 4 of 1st Embodiment of the hydraulic-pressure control unit of 3rd Embodiment of this invention. It is sectional drawing corresponding to FIG. 4 of 1st Embodiment of the hydraulic-pressure control unit of 4th Embodiment of this invention. It is sectional drawing corresponding to FIG. 4 of 1st Embodiment of the hydraulic-pressure control unit of 5th Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, directions such as front and rear, left and right, and up and down are the same as those in the vehicle unless otherwise specified. In the drawings, the arrow FR indicates the front of the vehicle, and the arrows UP and LH indicate the upper side of the vehicle and the left side of the vehicle, respectively.

FIG. 1 is a schematic left side view of a part of the motorcycle showing an example of the arrangement of the brake device of the embodiment, and FIG. 2 is a schematic top view of a part of the motorcycle. 3 is a cross-sectional view corresponding to the III-III cross section of FIG.
The brake device according to the embodiment is a brake device for a rear wheel of a motorcycle, and a brake rotor that rotates integrally with a rear brake WR and a rear brake pedal 10 (operator) that is depressed by a driver's feet. 11, a brake caliper 12 that applies a frictional braking force to the motor 11, and a fluid pressure control unit 20 that controls the fluid pressure of the brake fluid supplied to the brake caliper 12 when the rear brake pedal 10 is depressed.

In FIG. 1, reference numeral 13 denotes a vehicle body frame that is substantially in the center in the front-rear direction of the motorcycle. An engine unit (not shown) is attached to the vehicle body frame 13 and a swing arm 14 that supports the rear wheel WR so as to be swingable is attached.
1 to 3, reference numeral 15 denotes a step holder that is supported and fixed to the vehicle body frame 13 on the right side of an engine unit (not shown) and the swing arm 14. A main step 16 on which the driver's feet are placed and a pillion step 17 on which the rear occupant's feet are placed are attached to the outer surface of the step holder 15, and the hydraulic pressure control of the brake device is provided on the rear side. The unit 20 is supported by mounting portions 50 and 51 that are provided apart from each other in the vertical direction, and the rear brake pedal 10 is mounted at a front position thereof.

FIG. 4 is a cross-sectional view corresponding to the IV-IV cross section of FIG. 3 of the hydraulic control unit 20 according to the first embodiment.
First, the entire system of the brake device will be described.
The brake system is provided with a main passage 40 that connects a master cylinder 21 that is operated by a rear brake pedal (operator) 10 to generate hydraulic pressure, a brake caliper 12 that applies braking force to the wheel, and a wheel that is provided in the main passage 40. A normally-open supply-side control valve 25 (input control valve) that shuts off brake fluid supplied from the master cylinder 21 when a slip is detected (when the ABS is activated), and a pressure reducing brake caliper 12 when the ABS is activated. A reservoir 23 for retracting brake fluid from the brake caliper 12, a reserve path 44 that branches from the brake caliper 12 side than the supply side control valve 25 of the main path 40 and is connected to the reservoir 23, and a reserve path 44 are provided. The normally closed discharge side control valve for allowing the brake fluid to flow into the reservoir 23 when the ABS is operated And a 6 (output control valve).

  The main passage 40 is provided separately from an internal main passage (a horizontal passage 40a and a vertical passage 40b described later) formed in the fluid pressure control unit 20 and the fluid pressure control unit 20, and the fluid pressure control unit 20 and the brake. And a brake pipe 39 to which the caliper 12 is connected. The reserve passage 44 includes an internal reserve passage 41 formed in the fluid pressure control unit 20 and an external reserve passage 35 that is provided separately from the fluid pressure control unit 20 and connects the fluid pressure control unit 20 and the reservoir 23. .

  The hydraulic pressure control unit 20 includes a master cylinder 21, a discharge port 22 connected to the brake caliper 12 of the rear wheel WR, a reservoir connection port 24 connected to an external reservoir 23, and the brake caliper 12 side from the master cylinder 21. An integrated unit block 27 includes a supply-side control valve 25 that controls the flow of brake fluid supplied to the vehicle and a discharge-side control valve 26 that controls the flow of brake fluid discharged from the brake caliper 12 to the reservoir 23 side. Is provided. The reservoir connection port 24 is connected to the reservoir 23 via a connection hose 38 constituting an external reserve passage 35, and the discharge port 22 is connected to a brake pipe 39 (in this embodiment, a flexible brake hose is used). Via the brake caliper 12.

  In the master cylinder 21, a master piston 29 is slidably fitted in a cylinder hole 28 formed in the unit block 27 along a substantially vertical direction. The cylinder hole 28 opens to the lower side of the unit block 27. The lower end of the master piston 29 is connected to the rear brake pedal 10 via a connecting rod 30. When the rear brake pedal 10 is operated to be rotated upward about the rotation fulcrum s by a driver's stepping operation, the connecting rod 30 is pushed upward by the operating force, and the rear brake pedal 10 is connected via the connecting rod 30. Then, the master piston 29 is moved forward in the upward direction.

  A hydraulic chamber 31 is formed between the bottom of the cylinder hole 28 and the end face of the master piston 29. As will be described later, the brake fluid in the reservoir 23 is supplied into the hydraulic chamber 31. The brake fluid supplied into the hydraulic pressure chamber 31 is pressurized according to the forward operation of the master piston 29. A return spring 32 that biases the master piston 29 toward the initial position (last retracted position) is interposed between the bottom of the cylinder hole 28 and the end surface of the master piston 29. On the outer periphery of the master piston 29, a pair of cup seals 33a and 33b that are slidably in close contact with the inner peripheral surface of the cylinder hole 28 are mounted apart from each other in the axial direction.

  An annular region sandwiched between the front and rear cup seals 33 a and 33 b on the master piston 29 forms a brake fluid replenishing chamber 34 with the inner peripheral surface of the cylinder hole 28. An external reserve passage 35 (connection hose 38) is connected to the unit block 27 via the reservoir connection port 24. The replenishing chamber 34 is always connected to the external reserve passage 35 via the supply port 36. Further, the hydraulic chamber 31 on the front side of the cup seal 33a is electrically connected to the external reserve passage 35 via the relief port 37 only when the master piston 29 is moved to the last retracted position.

  When the master piston 29 is in the last retracted position, the fluid pressure chamber 31 is electrically connected to the external reservoir 23 via the relief port 37 and the external reserve passage 35, so that the pressure in the fluid pressure chamber 31 is released. . On the other hand, when the master piston 29 moves forward by the depression operation of the rear brake pedal 10 and the cup seal 33a exceeds the relief port 37, the brake fluid in the hydraulic pressure chamber 31 is pressurized. Further, when the master piston 29 is suddenly retracted by the return of the rear brake pedal 10, the cup seal 33 b on the rear side is bent due to the pressure difference between the replenishing chamber 34 and the hydraulic pressure chamber 31, and the refilling chamber 34 moves to the hydraulic pressure chamber 31. Brake fluid is replenished.

  The unit block 27 includes an internal main passage (40a, 40b) that connects the hydraulic chamber 31 of the master cylinder 21 and the discharge port 22, and a reservoir branched from the internal passage through an external reserve passage 35 (connection hose 38). And an internal reserve passage 41 connected to 23. The supply side control valve 25 is interposed in the middle of the internal main passages (40a, 40b), and the discharge side control valve 26 is interposed in the middle of the internal reserve passage 41.

  The internal main passage includes a horizontal passage 40a extending in a substantially horizontal direction from a side wall of the hydraulic chamber 31 of the master cylinder 21, and a vertical passage 40b extending perpendicularly upward to the horizontal passage 40a. The supply side control valve 25 is arranged at the intersection of the horizontal passage 40a and the vertical passage 40b. In the case of this embodiment, the master cylinder 21 and the vertical passage 40b are provided in the unit block 27 so as to face in a substantially vertical direction when the vehicle is attached.

One end side of the internal reserve passage 41 is connected in a substantially orthogonal state near the downstream end of the vertical passage 40 b of the internal main passage, and the other end side is connected to the external reserve passage 35. The discharge side control valve 26 is disposed at the intersection of the internal reserve passage 41 and the vertical passage 40b. However, the vertical passage 40b of the internal main passage is formed so as to bypass the outer peripheral side of the discharge-side control valve 26, and the discharge-side control valve 26 does not prevent upstream and downstream conduction.
In this embodiment, the supply-side control valve 25 and the discharge-side control valve 26 are disposed at positions opposite to the reservoir connection port 24 (side to which the reservoir 23 is connected) across the axis of the master cylinder 21. Yes.

  The supply side control valve 25 and the discharge side control valve 26 are both constituted by electromagnetic valves controlled by a controller (not shown). The supply-side control valve 25 and the discharge-side control valve 26 are electromagnetic coils 25a and 26a, valve bodies 25b and 26b that are advanced and retracted by excitation by the electromagnetic coils 25a and 26a, and valve holes that are opened and closed by the valve bodies 25b and 26b. And valve seat members 25c and 26c having (reference numerals omitted).

  The valve accommodation hole 42 on the unit block 27 in which the supply side control valve 25 is disposed is formed to extend substantially horizontally at the intersection of the horizontal passage 40a and the vertical passage 40b of the internal main passage. The supply-side control valve 25 is configured by a normally open type on-off valve. In normal times, the valve body 25b opens the main passage 40, and the valve body 25b closes the main passage 40 when the electromagnetic coil 25a is energized. It is like that.

The valve accommodation hole 43 on the unit block 27 in which the discharge side control valve 26 is disposed is formed to extend substantially horizontally at the intersection of the internal reserve passage 41 and the vertical passage 40b. The discharge-side control valve 26 is constituted by a normally closed on-off valve. Normally, the valve body 26b closes the internal reserve passage 41. When the electromagnetic coil 26a is energized, the valve body 26b passes through the internal reserve passage 41. It is supposed to open.
In FIG. 4, reference numeral o <b> 1 is an axial center part of the master cylinder 21, and reference signs o <b> 2 and o <b> 3 are axial center parts of the supply side control valve 25 and the discharge side control valve 26.

The electromagnetic coils 25a and 26a of the supply side control valve 25 and the discharge side control valve 26 are controlled by a controller (not shown). When the rear brake pedal 10 is depressed by the driver and the wheel slip behavior is detected by a sensor (not shown), the controller energizes the electromagnetic coils 25a and 26a to suppress the wheel slip. Control. Specifically, the energization of each electromagnetic coil 25a, 26a is controlled so that the hydraulic pressure of the brake caliper 12 is appropriately reduced, held, and increased again during a very short time. Hereinafter, the brake operation by this control is referred to as “ABS operation”.
The pressure increase of the brake caliper 12 at the time of the ABS operation is performed by the operation of the master cylinder 21 by increasing the rear brake pedal 10.

FIG. 5 is a diagram schematically showing the arrangement of the master cylinder 21, the supply side control valve 25, and the discharge side control valve 26 in the unit block 27.
As shown in the figure, the master cylinder 21, the supply-side control valve 25, and the discharge-side control valve 26 are virtual flat plate blocks whose axial center portions o1, o2, and o3 have substantially the same thickness as the diameter of the master cylinder 21. It is arranged in the unit block 27 so as to be located in V. In addition, as for each axial center part o1, o2, o3 of the master cylinder 21, the supply side control valve 25, and the discharge side control valve 26, it is desirable to arrange | position in the unit block 27 so that it may be located on the same plane. . In FIG. 5, the symbol H indicates the thickness of the virtual flat plate block V.
In the case of this embodiment, the supply-side control valve 25 and the discharge-side control valve 26 are arranged in the unit block 27 so that the shaft center portions o2 and o3 are parallel to each other, and the master cylinder 21 has its shaft The center portion o1 is disposed so as to be substantially orthogonal to the shaft center portions o2 and o3 of the supply side control valve 25 and the discharge side control valve 26. Further, as shown in FIG. 4, the discharge side control valve 26 is disposed vertically above the supply side control valve 25.

As described above, the hydraulic pressure control unit 20 according to this embodiment is configured so that each axial center portion o1, o2, o3 is positioned in the virtual flat plate block V having the same thickness as the diameter of the master cylinder 21. Since the cylinder 21, the supply side control valve 25 and the discharge side control valve 26 are arranged in the unit block 27, they do not occupy a large space in the thickness H direction of the unit block 27. Therefore, the unit block 27 of the hydraulic pressure control unit 20 is thin in the vehicle width direction as shown in FIG. 3, and the unit block 27 is less likely to interfere with surrounding components when mounted on the vehicle. In FIG. 3, reference numeral 1 indicates a separation width between the step holder 15 and the swing arm 14.
Therefore, by employing the hydraulic control unit 20 according to this embodiment, the degree of freedom of component layout when mounted on a vehicle can be increased.

  Further, in the hydraulic control unit 20 according to this embodiment, the reservoir 23 for retracting the brake fluid on the brake caliper 12 side when the ABS is operated also serves as a reserve tank for the master cylinder for replenishing the master cylinder 21 with the brake fluid. ing. For this reason, it is possible to reduce the number of parts, reduce the overall size and weight of the brake device, and reduce the product cost.

  In the case of the hydraulic control unit 20 according to this embodiment, the valve housing holes 42 and 43 of the supply side control valve 25 and the discharge side control valve 26 are formed in the unit block 27 so as to be substantially orthogonal to the master cylinder 21. Therefore, the unit block 27 can be prevented from becoming large in the front-rear direction, and the passage in the unit block 27 can be prevented from becoming complicated.

  Furthermore, in the hydraulic pressure control unit 20 according to this embodiment, the master cylinder 21 and the vertical passage 40b that continues to the discharge port 22 are both provided in the unit block 27 so as to face in a substantially vertical direction when the vehicle is attached. ing. For this reason, in the case of this hydraulic pressure control unit 20, air generated in the master cylinder 21 or the internal main passage or introduced from the outside passes through the discharge port 22 to the outside of the unit block 27, and the air stays in the unit block 27. It becomes difficult to do. Therefore, for example, by providing an air vent in the vicinity of the discharge port 22, the air in the brake circuit can be efficiently discharged to the outside.

  In the hydraulic control unit 20 according to this embodiment, a separate reservoir 23 is provided outside the unit block 27, and the reservoir 23 and the reservoir connection port 24 of the unit block 27 are connected by a connection hose 38. . For this reason, in the case of this hydraulic pressure control unit 20, the entire unit block 27 can be further downsized to improve the mountability on the vehicle.

  Next, other embodiments will be sequentially described. In each embodiment described below, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

FIG. 6 is a cross-sectional view corresponding to FIG. 4 of the first embodiment of the hydraulic control unit 120 according to the second embodiment.
The basic structure of the hydraulic pressure control unit 120 of the second embodiment is the same as that of the first embodiment, but the valve accommodation holes 42 and 43 provided in the unit block 27 are not substantially horizontal but relatively large. The point inclined at an angle (see axial center portions o102 and o103 in the figure) and the downstream passage 140b of the internal main passage continuing to the discharge port 22 are inclined so as to be substantially orthogonal to the valve accommodation holes 42 and 43. However, it is different from the first embodiment in that it is connected to the upper region of the inclined valve housing holes 42 and 43. In addition, the code | symbol 140a in a figure is an upstream channel | path of an internal main channel | path.

  The hydraulic pressure control unit 120 of this embodiment can basically obtain the same effects as those of the first embodiment, but the valve accommodation holes 42 and 43 are inclined at a relatively large angle, Since the downstream side passage 140b of the internal main passage is connected to the region, it is easy to discharge the air generated in the supply side control valve 25 and the discharge side control valve 26 through the downstream side passage 140b and the discharge port 22 to the outside. There are additional advantages.

  By the way, in each embodiment mentioned above, although the discharge side control valve 26 is provided in the location where the reserve channel | path 44 branches from the main channel | path 40 in the unit block 27, the installation location of the discharge side control valve 26 is this part. Not limited to this, it may be anywhere on the reserve passage 44. However, when the discharge-side control valve 26 is provided at a location where the reserve passage 44 branches from the main passage 40 as in the above embodiments, the discharge-side control valve 26 is close to the brake caliper 12. Since it is opened and closed, it is difficult to be affected by hydraulic pressure loss or the like.

FIG. 7 is a cross-sectional view corresponding to FIG. 4 of the first embodiment of the hydraulic control unit 220 according to the third embodiment.
The hydraulic pressure control unit 220 of the third embodiment has the same basic configuration as that of the first embodiment, but the reservoir connection port 24 is connected to the supply-side control valve 25 and the exhaust with the axis of the master cylinder 21 in between. The connection hose 38 connected to the reservoir connection port 24 and the side hose 38 disposed on the same side as the side control valve 26 are connected to the side bulges of the supply side control valve 25 and the discharge side control valve 26 (electromagnetic coil 25a, 26a is different from the first embodiment in that it is pulled out along the outer end face of the part 26a.

  The hydraulic control unit 220 of this embodiment can basically obtain the same effect as that of the first embodiment, but the connection hose 38 connected to the reservoir connection port 24 is connected to the supply-side control valve 25 and the exhaust. Since the side control valve 26 is pulled out along the outer end face of the side bulging portion, the structure around the hydraulic control unit 220 including the connection hose 38 can be further reduced in size.

FIG. 8 is a cross-sectional view corresponding to FIG. 4 of the first embodiment of the hydraulic control unit 320 according to the fourth embodiment.
The fluid pressure control unit 320 of the fourth embodiment has the same basic configuration as that of the first embodiment, but the valve accommodation holes 42 and 43 are inclined at a relatively large angle, and each of these upper side regions Are connected to the discharge port 22 side of the internal passage, and the connection hose 38 connected to the reservoir connection port 24 is along the outer end face of the side bulging portion of the supply side control valve 25 and the discharge side control valve 26. It is different from the first embodiment in that it is drawn out.

  The hydraulic control unit 320 of this embodiment can obtain the same effects as those of the first embodiment, and can obtain the same effects as those of the second and third embodiments described above.

FIG. 9 is a cross-sectional view corresponding to FIG. 4 of the first embodiment of the hydraulic pressure control unit 420 according to the fifth embodiment.
The hydraulic pressure control unit 420 of the fifth embodiment is basically the same as that of the first embodiment, but a reservoir 423 for retracting the brake fluid of the brake caliper 12 when the ABS is operated is integrated with the unit block 27. It is different from the first embodiment in that it is assembled. In the case of this embodiment, the reservoir 423 is formed in a substantially cylindrical shape as a whole, and the axial center portion o4 thereof is the axial center portions o1, o2 of the master cylinder 21, the supply side control valve 25, and the discharge side control valve 26. , O3 are arranged in the unit block 27 so as to be positioned in the virtual flat plate block having the same thickness as the diameter of the master cylinder 21.

  The hydraulic pressure control unit 420 of this embodiment can be configured in a compact manner including the reservoir 423 as a whole.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

10 Rear brake pedal (operator)
12 Brake Caliper 20, 120, 220, 320, 420 Hydraulic Control Unit 21 Master Cylinder 23 Reservoir 25 Supply Side Control Valve 26 Discharge Side Control Valve 27 Unit Block 35 External Reserve Passage 39 Brake Piping 40 Main Passage 40b Vertical Passage (Passage)
41 Internal reserve passage 42, 43 Valve housing hole 44 Reserve passage o1, o2, o3 Shaft center V Virtual flat plate block

Claims (5)

A master cylinder (21) which is operated by the operator (10) to generate hydraulic pressure and supply brake fluid to the brake caliper (12);
A reservoir (23) for retracting brake fluid from the brake caliper (12) when slipping of the wheel is detected;
A main passage (40) connecting the master cylinder (21) to the brake caliper (12) via an external brake pipe (39);
A normally-open supply side control valve (25) provided in the main passage (40) for controlling the flow of brake fluid flowing through the main passage (40);
A reserve passage (44) branched from the brake caliper (12) side of the main passage (40) from the supply side control valve (25) and connected to the reservoir (23);
A normally closed discharge side control valve ( 26 ) provided in the reserve passage (44) for controlling the flow of brake fluid flowing through the reserve passage (44),
Said master cylinder (21), the supply-side control valve (25), and, in the hydraulic control unit in which the discharge-side control valve (26) is provided integrally with the unit block (27),
The master cylinder (21), the supply-side control valve (25), and the discharge-side control valve (26) are configured such that their axial centers (o1, o2, o3) have a diameter of the master cylinder (21). It is arranged in the unit block (27) so as to be located in the virtual flat plate block (V) having substantially the same thickness ,
A hydraulic pressure control unit for a brake device, wherein a thickness direction of the virtual flat plate block (V) is along a vehicle width direction .   The hydraulic pressure control unit for a brake device according to claim 1, wherein the reservoir (23) also serves as a reserve tank for a master cylinder that replenishes the master cylinder (21) with brake fluid.   A valve housing hole (42) of the supply-side control valve (25) and a valve housing hole (43) of the discharge-side control valve (26) are arranged in the unit block so as to be substantially orthogonal to the master cylinder (21). 27) The hydraulic control unit for a brake device according to claim 1 or 2, wherein the hydraulic pressure control unit is formed in (27). The master cylinder (21), wherein the passages of the unit block (27) connected to the brake caliper (12) side (40b), said to be directed in a substantially vertical direction in a vehicle mounted state unit block (27 The hydraulic control unit of the brake device according to any one of claims 1 to 3, wherein the hydraulic pressure control unit is provided in the brake device.   The hydraulic pressure control unit for a brake device according to any one of claims 1 to 4, wherein the reservoir (23) is provided separately from the unit block (27).

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