JP7010969B2 - Brake fluid pressure control device - Google Patents

Description

The present invention relates to a brake fluid pressure control device.

Conventionally, there is known a brake hydraulic pressure control device in which a hydraulic pressure unit that controls the hydraulic pressure of the brake fluid supplied to the braking unit by a hydraulic pressure circuit to perform brake control is attached to a vehicle body via a bracket.

The brake fluid pressure control device has a control valve that can be opened and closed, a pump that operates in conjunction with the control valve, and the like. The brake fluid pressure control device is electronically controlled and automatically operates, and controls the braking force generated on the wheels by increasing or decreasing the hydraulic pressure in the brake fluid pressure circuit.

Such a brake fluid pressure control device is provided with an accumulator as a piston type reservoir used for reducing the pressure of the brake fluid and temporarily storing the brake fluid. The accumulator is equipped with a piston that reciprocates in the axial direction.

The accumulator has a piston and a spring housed inside a recess formed on the outer surface of the housing of the hydraulic unit, and is configured by caulking the cover against the opening of the recess (for example, Patent Document 1). See).

Japanese Unexamined Patent Publication No. 2016-210326

When designing a hydraulic unit, it is necessary to change the size of the housing and change the depth and size of the recess in order to realize an accumulator of an appropriate size according to the vehicle. Therefore, it is necessary to prepare a housing at least for each size of the accumulator, which may increase the management cost. Further, when the size of the housing is increased in order to increase the depth of the recess, the material cost, the weight, and the size of the hydraulic pressure unit may increase.

The present invention has been made in view of the above problems, and provides a brake hydraulic pressure control device capable of improving the degree of freedom in designing the size of the accumulator while sharing the housing of the hydraulic pressure unit.

According to a certain aspect of the present invention, it is a brake hydraulic pressure control device that controls the hydraulic pressure of the brake hydraulic pressure circuit, has an internal flow path that constitutes a part of the brake hydraulic pressure circuit, and has one end of the internal flow path. The housing comprises a housing that opens to the outer surface and an accumulator unit that is attached at a position where one end of the internal flow path of the housing opens, and the housing has a recess at a position where one end of the internal flow path opens. The accumulator unit is fixed to the recess, and the accumulator unit has a piston that receives the brake liquid that flows in through the internal flow path on the surface on one end side in the axial direction, an urging member that urges the piston toward one end side, and the piston. It has a sleeve member that reciprocates and holds it in the axial direction, and a base that is fixed to the housing on one end side and the sleeve member is fixed on the other end side, and the base is fitted into a recess of the housing. Provided is a brake hydraulic pressure control device having a portion and having a capacitance portion including a space formed between an end surface of the base portion on the fitting portion side and a bottom surface of a recess of the housing .

As described above, according to the present invention, it is possible to improve the degree of freedom in designing the size of the accumulator provided in the brake hydraulic pressure control device while sharing the housing of the hydraulic pressure unit.

It is a circuit diagram which shows the hydraulic circuit for a brake which concerns on embodiment of this invention. It is a perspective view which shows the brake fluid pressure control device. It is sectional drawing which shows the structural example of the accumulator unit which concerns on the same embodiment. It is a perspective view which shows the accumulator unit which concerns on the same embodiment. It is a perspective view which shows the accumulator unit which concerns on the same embodiment. It is an exploded perspective view which shows the accumulator unit which concerns on the same embodiment. It is sectional drawing which shows the conventional accumulator unit. It is explanatory drawing which compares the size of a housing. It is explanatory drawing which shows the example which made the size of accumulator unit different. It is explanatory drawing which shows the installation position of the accumulator unit. It is explanatory drawing which shows the installation position of the accumulator unit. It is explanatory drawing which shows the installation position of the accumulator unit. It is sectional drawing which shows the accumulator unit which concerns on the modification of the said embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, and duplicate description will be omitted.

<1. Hydraulic circuit for brake>
FIG. 1 shows an example of a brake hydraulic circuit 100 to which the brake fluid pressure control device 70 according to the embodiment of the present invention can be applied.

The brake hydraulic circuit 100 shown in FIG. 1 is mounted on, for example, a motorcycle vehicle, and is configured as a well-known hydraulic circuit for anti-lock brake control. Here, the anti-lock brake control (so-called ABS control) refers to a control in which the brake fluid pressure is intermittently reduced to suppress the locked state of the wheels, for example, when the vehicle is braking.

Since the operating principle and basic control method of anti-lock brake control are known to those skilled in the art, detailed description thereof will be omitted.

The brake hydraulic circuit 100 includes a front wheel master cylinder 101, a front wheel reservoir tank 102 and a front wheel wheel cylinder 103 of a front wheel disc brake device (braking unit) 111 for generating a braking force on the front wheels, and a braking force on the rear wheels. It is provided with a rear wheel master cylinder 104, a rear wheel reservoir tank 105, a rear wheel wheel cylinder 106, and a hydraulic pressure unit 10 for generating a rear wheel disc brake device (braking unit) 116.

The hydraulic pressure unit 10 is provided between the front wheel and rear wheel master cylinders 101 and 104 and the front wheel and rear wheel wheel cylinders 103 and 106. Further, the hydraulic pressure unit 10 controls the pressure of the brake fluid supplied from the front wheel master cylinder 101 to the front wheel wheel cylinder 103, or the brake fluid supplied from the rear wheel master cylinder 104 to the rear wheel cylinder 106. The pressure is controlled to perform the above-mentioned anti-lock brake control.

A front wheel reservoir tank 102 is connected to the front wheel master cylinder 101 via a first pipe 107. Further, the front wheel wheel cylinder 103 is connected to the front wheel master cylinder 101 via the second pipe 108, the hydraulic pressure unit 10, and the third pipe 109.

When the front wheel master cylinder 101 is operated, for example, by operating the steering wheel lever 110 of the vehicle, the brake hydraulic pressure of the front wheel wheel cylinder 103 is increased via the hydraulic pressure unit 10. Further, the front wheel cylinder 103 operates the front wheel disc brake device 111 according to the supplied brake fluid pressure to brake the front wheels.

A rear wheel reservoir tank 105 is connected to the rear wheel master cylinder 104 via a fourth pipe 112. Further, the rear wheel wheel cylinder 106 is connected to the rear wheel master cylinder 104 via the fifth pipe 113, the hydraulic pressure unit 10, and the sixth pipe 114.

When the rear wheel master cylinder 104 is operated, for example, by operating the foot pedal 115 of the vehicle, the brake hydraulic pressure of the rear wheel wheel cylinder 106 is increased via the hydraulic pressure unit 10. Further, the rear wheel cylinder 106 operates the rear wheel disc brake device 116 according to the supplied brake fluid pressure to brake the rear wheels.

<2. Brake fluid pressure control device>
Next, the brake fluid pressure control device 70 will be described in detail. As shown in FIG. 1, the brake hydraulic pressure control device 70 has a hydraulic pressure unit 10 and an electronic control unit (ECU: Electronic Control Unit) 40.

The hydraulic unit 10 includes a front wheel supply solenoid valve 1, a front wheel discharge solenoid valve 2, a rear wheel supply solenoid valve 3, a rear wheel discharge solenoid valve 4, a front wheel pump 5, a rear wheel pump 6, and a motor 7. is doing.

The front wheel supply solenoid valve 1 and the front wheel discharge solenoid valve 2 and the rear wheel supply solenoid valve 3 and the rear wheel discharge solenoid valve 4 are, for example, well-known two-position solenoid valves. In the normal state, that is, in the state where the anti-lock brake control is not performed, the front wheel supply solenoid valve 1 and the rear wheel supply solenoid valve 3 are in the open state, and the front wheel discharge solenoid valve 2 and the rear wheel discharge solenoid valve 4 are in the closed state. Will be.

Further, the front wheel pump 5 and the rear wheel pump 6 are configured to be driven by a motor 7 controlled by the ECU 40. The front wheel supply solenoid valve 1, the front wheel discharge solenoid valve 2, the rear wheel supply solenoid valve 3, the rear wheel discharge solenoid valve 4 and the motor 7 are connected to the ECU 40 and are driven and controlled based on the control signal from the ECU 40. Will be done.

The hydraulic unit 10 includes a front wheel flow path (internal flow path) 11 for flowing brake fluid supplied from the front wheel master cylinder 101 to the front wheel wheel cylinder 103, and a rear wheel master cylinder 104 to the rear wheel wheel cylinder. It includes a rear wheel flow path (internal flow path) 21 for flowing the brake fluid supplied to the 106.

In the front wheel flow path 11, one end side of the first flow path 11a is connected to the second pipe 108, and the other end side is connected to the front wheel supply solenoid valve 1. One end side of the second flow path 11b is connected to the front wheel supply solenoid valve 1, and the other end side is connected to the third pipe 109.

One end side of the third flow path 11c is connected to the first flow path 11a, and the other end side of the third flow path 11c is connected to the discharge side of the front wheel pump 5. One end side of the fourth flow path 11d is connected to the suction side of the front wheel pump 5, and the other end side is connected to the front wheel exhaust solenoid valve 2.

The front wheel pump 5 flows the brake fluid from the fourth flow path 11d side to the third flow path 11c side, that is, from the front wheel wheel cylinder 103 side to the front wheel master cylinder 101 side. An accumulator unit 9 for reducing the pressure of the brake fluid is connected to the fourth flow path 11d.

One end side of the fifth flow path 11e is connected to the second flow path 11b, and the other end of the fifth flow path 11e is connected to the front wheel exhaust solenoid valve 2. The second flow path 11b is provided with a pressure sensor 13 for detecting the pressure of the brake fluid supplied to the front wheel wheel cylinder 103.

On the other hand, in the rear wheel flow path 21, one end side of the first flow path 21a is connected to the fifth pipe 113, and the other end side is connected to the rear wheel supply solenoid valve 3. One end side of the second flow path 21b is connected to the rear wheel supply solenoid valve 3, and the other end side is connected to the sixth pipe 114.

One end of the third flow path 21c is connected to the first flow path 21a, and the other end of the third flow path 21c is connected to the discharge side of the rear wheel pump 6. One end side of the fourth flow path 21d is connected to the suction side of the rear wheel pump 6, and the other end side is connected to the rear wheel exhaust solenoid valve 4.

The rear wheel pump 6 causes the brake fluid to flow from the fourth flow path 21d side to the third flow path 21c side, that is, from the rear wheel wheel cylinder 106 side to the rear wheel master cylinder 104 side. An accumulator unit 12 for reducing the pressure of the brake fluid is connected to the fourth flow path 21d.

One end of the fifth flow path 21e is connected to the second flow path 21b, and the other end of the fifth flow path 21e is connected to the rear wheel exhaust solenoid valve 4.

A check valve is provided in each of the front wheel supply solenoid valve 1 and the rear wheel supply solenoid valve 3, and a throttle valve is provided on the discharge side of the front wheel pump 5 and the rear wheel pump 6, respectively. Also, before and after the front wheel supply solenoid valve 1 and the rear wheel supply solenoid valve 3, in front of the front wheel pump 5 and the rear wheel pump 6, and in front of the front wheel exhaust solenoid valve 2 and the rear wheel exhaust solenoid valve 4. Is provided with one filter (not shown).

FIG. 2 is a perspective view showing the brake fluid pressure control device 70 according to the present embodiment. The front wheel supply solenoid valve 1, the front wheel discharge solenoid valve 2, the rear wheel supply solenoid valve 3, the rear wheel discharge solenoid valve 4, the front wheel pump 5, the rear wheel pump 6, and the accumulator units 9 and 12, respectively, are housings 30. It is attached to the opening formed on the outer surface of the.

The front wheel pump 5 is mounted on the side surface 30c of the housing 30. The rear wheel pump 6 is mounted on the back surface of the side surface 30c to which the front wheel pump 5 is mounted. A motor 7 is mounted on the side surface 30a that is vertically continuous from the side surface 30c on which the front wheel pump 5 is mounted.

The accumulator units 9 and 12 are mounted on the lower surface 30b which is vertically continuous from each of the side surface 30a on which the front wheel pump 5 is mounted and the side surface 30a on which the motor 7 is mounted. One end of the fourth flow path 11d of the front wheel flow path 11 is open at the position where the accumulator unit 9 is mounted. One end of the fourth flow path 21d of the rear wheel flow path 21 is open at the position where the accumulator unit 12 is mounted.

Solenoid valves 1, 2, 3, 4 and a pressure sensor 13 are mounted on the back surface of the surface 30a to which the motor 7 is mounted. Further, an electronic control unit 40 is attached to the back side of the surface 30a to which the motor 7 is attached.

The electronic control unit 40 has an electronic control board that controls the drive of the motor 7 and controls the opening and closing of the solenoid valves 1, 2, 3 and 4. The electronic control unit 40 controls the opening and closing of the solenoid valves 1, 2, 3 and 4 when the ABS is operating to avoid locking the front wheels and the rear wheels.

<3. Accumulator unit>
Next, the accumulator units 9 and 12 provided in the brake fluid pressure control device 70 according to the present embodiment will be described in detail. Here, the accumulator unit 9 provided in the front wheel flow path 11 will be described as an example.

(3-1. Configuration of accumulator unit)
3 to 6 are explanatory views showing the configuration of the accumulator unit 9. FIG. 3 is a cross-sectional view of the accumulator unit 9 fixed to the housing 30. FIG. 4 is a perspective view of the accumulator unit 9 as viewed from the base 51 side, and FIG. 5 is a perspective view of the accumulator unit 9 as viewed from the sleeve member 53 side. FIG. 6 is an exploded perspective view of the accumulator unit 9.

The accumulator unit 9 includes a base 51, a sleeve member 53, a piston 55, a spring 57, and an annular seal member 59. In the present embodiment, the accumulator unit 9 is integrally assembled and mounted in the recess 30e formed in the housing 30.

In the present embodiment, the base portion 51 has a flow hole 51a, a fitting portion 51b, a flange portion 51c, and a small diameter portion 51d. The fitting portion 51b, the flange portion 51c, and the small diameter portion 51d are arranged in this order along the axial direction. The flow hole 51a is formed in the central portion of the base portion 51 along the axial direction and opens on both ends in the axial direction.

The fitting portion 51b is a portion to be fitted into the recess 30e of the housing 30. The flange portion 51c has a diameter larger than that of the fitting portion 51b and is a portion joined to the peripheral edge portion of the recess 30e of the housing 30. The small diameter portion 51d has a diameter substantially the same as the diameter of the inner circumference of the sleeve member 53, and the sleeve member 53 is fitted and joined.

The base portion 51 is fixed to the housing 30 to form a capacity portion 60 capable of storing the brake fluid. In the present embodiment, the space formed between the end surface of the base 51 on the fitting portion 51b side and the bottom surface of the recess 30e of the housing 30, the flow hole 51a of the base 51, and the end surface of the base 51 on the small diameter portion 51d side and the piston. The space formed between the 55 and the capacity portion 60 functions as the capacitance portion 60.

The method of joining the base 51 and the housing 30 is not particularly limited. For example, the base 51 and the housing 30 may be joined by mechanical coupling, caulking, friction welding, ultrasonic welding or adhesive welding.

The sleeve member 53 is a cylindrical member having one end side in the axial direction formed as an open end and the other end side formed as a closed end. The open end of the sleeve member 53 is fitted and joined to the small diameter portion 51d of the base portion 51.

The method of joining the base 51 and the sleeve member 55 is not particularly limited. For example, the base 51 and the sleeve member 55 may be joined by caulking, laser welding, or adhesive bonding.

The piston 55 is arranged so as to be movable in the axial direction inside the sleeve member 55. A spring 57 is housed in a compressed state between the piston 55 and the bottom portion 53a of the sleeve member 55. As a result, the piston 55 is urged toward the base 51 side along the axial direction.

The piston 55 receives the brake fluid flowing into the capacitance portion 60 at the end surface on the base 51 side. When the urging force of the piston 55 due to the pressure received by the piston 55 exceeds the urging force of the piston 55 by the spring 57, the piston 55 moves downward in the figure. That is, the position of the piston 55 changes according to the pressure of the brake fluid flowing into the capacity unit 60, and the volume of the capacity unit 60 changes.

The spring 57 is one aspect of the urging member in the present invention, and the urging member is not limited to the spring 57. For example, the urging member may be made of a leaf spring, elastic rubber, or the like.

The annular seal member 59 is arranged in the annular groove 55a formed on the outer peripheral surface of the piston 55. The annular seal member 59 is arranged between the inner peripheral portion of the sleeve member 53 and the outer peripheral portion of the piston 55, and slides on the inner peripheral surface of the sleeve member 53 from the capacitance portion 60 to the space where the spring 57 is accommodated. It has a function to prevent the leakage of brake fluid.

The accumulator unit 9 may be integrally assembled in advance as shown in FIGS. 4 to 6 and then joined to the recess 30e of the housing 30 of the hydraulic pressure unit 10.

(3-2. Change of accumulator size)
In the accumulator unit 9 according to the present embodiment, if the diameter of the fitting portion 51b of the base portion 51 is constant and the flange portion 51c can be joined to the peripheral portion of the recess 30e of the housing 30, other design dimensions are changed. By doing so, the volume of the capacity unit 60 can be changed.

For example, in the accumulator unit 9 shown in FIG. 3, the volume of the capacity unit 60 can be increased without changing the design of the housing 30 by changing the thickness of the base 51 or the diameter of the flow hole 51a of the base 51. Can be changed.

Further, by changing the axial length of the sleeve member 53, the amount of change in the volume of the capacitance portion 60 can be adjusted without changing the design of the housing 30. At that time, the elastic force of the spring 57 may be changed.

As described above, in the brake hydraulic pressure control device 70 according to the present embodiment, by changing the design of the components of the accumulator unit 9, the accumulator unit 9 having a different size is liquid without changing the design of the housing 30 of the hydraulic pressure unit 10. It can be provided in the pressure unit 10. As a result, the degree of freedom in designing the size of the accumulator unit 9 can be improved while sharing the housing 30 of the hydraulic pressure unit 10.

(3-3. Housing size)
In the accumulator unit 9 according to the present embodiment, the sleeve member 53 is fixed to the base portion 51 outside the position of the mounting surface of the housing 30. Therefore, the size of the housing can be reduced as compared with the conventional hydraulic unit in which the piston and the spring are housed in the recess formed in the housing 30 and the inner peripheral portion of the recess is used as a cylinder to form an accumulator.

FIG. 7 is a cross-sectional view showing the configuration of the conventional accumulator 150. The conventional accumulator 150 is configured by utilizing the recess 163 formed at a position facing one end of the internal flow path 161a in the housing 161 of the hydraulic unit.

A piston 155 and a spring 157 are housed inside the recess 163 of the housing 161. A plug 151 is caulked and attached to the opening of the recess 163. An annular seal member 159 is provided on the outer peripheral surface of the piston 155.

The spring 157 is arranged in a compressed state between the piston 155 and the plug 151, and urges the piston 155 to the bottom surface side of the recess 163. The piston 155 moves by receiving the brake fluid flowing in from the internal flow path 161a at the end surface on the bottom surface side of the recess 163. As a result, the accumulator 150 holds the brake fluid.

FIG. 8 is an explanatory diagram comparing the size of the housing 161 of the conventional hydraulic pressure unit with the size of the housing 30 of the hydraulic pressure unit 10 according to the present embodiment. As shown in FIG. 7, in the conventional hydraulic unit, the accumulator 150 is configured by utilizing the recess 163 formed in the housing 161.

On the other hand, in the hydraulic unit 10 according to the present embodiment, since the accumulator unit 9 is externally attached to the housing 30, the dimension of the housing 30 can be reduced by 1 minute in length. As a result, the material cost and weight of the housing 30 and the size of the hydraulic pressure unit 10 can be reduced.

FIG. 9 shows an example in which the size of the accumulator unit 9 is different in the hydraulic pressure unit 10 according to the present embodiment. In the brake fluid pressure control device according to the present embodiment, it is not essential to change the housing 30 of the hydraulic pressure unit 10 even if the size of the accumulator unit 9 is different.

That is, in the hydraulic pressure units 10 shown in FIGS. 8 and 9, although the accumulator units 9 provided are different in size, a common housing 30 is used. Therefore, it is possible to improve the degree of freedom in designing the size of the accumulator unit 9 while sharing the housing 30 of the hydraulic pressure unit 10.

(3-4. Installation position of accumulator unit)
Since the brake hydraulic pressure control device 70 according to the present embodiment has a configuration in which the accumulator unit 9 is externally attached to the housing 30 of the hydraulic pressure unit 10, it is possible to improve the degree of freedom in the installation position of the accumulator unit 9. ..

10 to 12 are schematic views showing an example of the installation position of the accumulator unit 9, respectively. FIG. 10 is an example in which the accumulator unit 9 is installed on the lower surface 30b of the housing 30 shown in FIGS. 3 and 8 and the like.

FIG. 11 shows an example in which the accumulator unit 9 is installed on the side surface 30a of the housing 30 to which the motor 7 is attached. According to the configuration example shown in FIG. 11, the accumulator unit 9 does not protrude downward from the lower surface 30b of the housing 30, so that the brake fluid pressure control device 70 is shown in the vertical direction as compared with the configuration example shown in FIG. The size can be reduced.

Further, in the configuration example shown in FIG. 11, since the accumulator unit 9 protrudes in the direction in which the motor 7 protrudes from the housing 30, the vertical size of the brake fluid pressure control device 70 is suppressed from increasing in the horizontal direction. The size can be reduced.

FIG. 12 is an example in which the accumulator unit 9 is installed on the back surface 30d of the side surface 30a of the housing 30 to which the motor 7 is mounted and on the surface 30d of the housing 30 in which the ECU 40 is arranged. In the configuration example shown in FIG. 12, the accumulator unit 9 is arranged in the housing of the ECU 40.

According to the configuration example shown in FIG. 12, the accumulator unit 9 does not protrude downward from the lower surface 30b of the housing 30, so that the brake fluid pressure control device 70 is shown in the vertical direction as compared with the configuration example shown in FIG. The size can be reduced.

Further, in the configuration example shown in FIG. 12, since the accumulator unit 9 is housed in the housing of the ECU 40, the size in the vertical direction can be reduced without changing the size in the horizontal direction shown in the brake fluid pressure control device 70. can.

The installation positions of the accumulator units 9 illustrated in FIGS. 10 to 12 are only examples. In the brake fluid pressure control device 70 according to the present embodiment, since it is not necessary to form a recess that functions as a cylinder of the piston in the housing 30 of the hydraulic pressure unit 10, the degree of freedom in the installation position of the accumulator unit 9 is high.

(3-5. Modification example)
In the brake fluid pressure control device 70 according to the present embodiment, the configuration of the accumulator unit 9 can be variously changed.

For example, the base 51 among the components of the accumulator unit 9 shown in FIG. 3 may be omitted. FIG. 13 is a cross-sectional view showing the configuration of the accumulator unit 209 according to the modified example having no base.

In the accumulator unit 209 according to the modified example, the flange portion 203a formed at the open end of the sleeve member 203 is joined to the peripheral edge portion of the recess 30f formed in the housing 30 of the hydraulic pressure unit 10.

The method of joining the sleeve member 203 and the housing 30 is not particularly limited. For example, the sleeve member 203 and the housing 30 may be joined by mechanical coupling, caulking, friction welding, ultrasonic welding or adhesive welding.

A piston 55 and a spring 57 are housed inside the sleeve member 203. An annular seal member 59 is arranged on the outer peripheral surface of the piston 55. The spring 57 is housed in a compressed state between the piston 55 and the bottom 203b of the sleeve member 203. As a result, the piston 55 is urged toward the housing 30 side along the axial direction.

The piston 55 receives the brake fluid flowing in through the internal flow path 11d at the end surface on the housing 30 side and moves downward in the figure. That is, the position of the piston 55 changes according to the pressure of the inflowing brake fluid, and the accumulator unit 209 holds the brake fluid.

The accumulator unit 209 according to the modified example can also change the size of the accumulator unit 209 without changing the design of the housing 30 by changing the axial length of the sleeve member 203 to be joined to the housing 30. As a result, the degree of freedom in designing the accumulator unit 209 can be improved while sharing the housing 30 of the hydraulic pressure unit 10.

Further, in the accumulator unit 209 according to the modified example, most of the sleeve member 203 is arranged outside the position of the mounting surface in the housing 30. Therefore, the size of the housing 30 can be reduced to reduce the material cost, weight, and size of the hydraulic unit.

Further, the accumulator unit 209 according to the modified example can also improve the degree of freedom in selecting the installation position of the accumulator unit 209 with respect to the housing 30. This makes it possible to reduce the size of the brake fluid pressure control device 70.

As described above, the brake fluid pressure control device 70 according to the present embodiment includes an accumulator unit 9 having a base 51, a piston 55, a spring 57, and a sleeve member 53. The accumulator unit 9 is attached at a position where one end of the internal flow path 11d of the housing 30 is opened.

Therefore, by changing the design of the components of the accumulator unit 9, the size of the accumulator unit 9 can be reduced without changing the design of the housing 30. As a result, the degree of freedom in designing the accumulator unit 9 can be improved while sharing the housing 30 of the hydraulic pressure unit 10.

Further, in the brake fluid pressure control device 70 according to the present embodiment, since the accumulator unit 9 is externally attached to the housing 30, it is not necessary to provide the housing 30 with a recess for accommodating the piston. Therefore, the size of the housing 30 can be reduced, and the material cost, weight, and the size of the hydraulic pressure unit can be reduced.

Further, since the brake fluid pressure control device 70 according to the present embodiment has a configuration in which the accumulator unit 9 is externally attached to the housing 30, the degree of freedom in the installation position of the accumulator unit 9 can be increased. Therefore, the size of the brake fluid pressure control device 70 can be reduced depending on the installation position of the accumulator unit 9.

Further, in the case where the accumulator unit 9 has the base 51 in the brake fluid pressure control device 70 according to the present embodiment, the accumulator unit 9 can be integrally assembled in advance before being attached to the housing 30. Therefore, the assembly work of the accumulator unit 9 can be made more efficient.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that a person having ordinary knowledge in the field of technology to which the present invention belongs can come up with various modifications or modifications within the scope of the technical ideas described in the claims. , These are also naturally understood to belong to the technical scope of the present invention.

Further, in the above embodiment, the brake fluid pressure control device mounted on the motorcycle is described as an example, but the present invention is not limited to such an example, and the brake fluid pressure control mounted on other vehicles such as automobiles is used. It may be a device.

9 ... Accumulator unit, 10 ... Hydraulic unit, 11d ... 4th flow path (internal flow path), 12 ... Accumulator unit, 30 ... Housing, 30a ... Side surface, 30b ... .. Bottom surface, 30e ... recess, 40 ... electronic control unit (ECU), 51 ... base, 53 ... sleeve member, 55 ... piston, 57 ... spring, 59 ... Circular seal member, 70 ... Brake fluid pressure control device

Claims (4)

A brake fluid pressure control device (70) that controls the hydraulic pressure of the brake fluid pressure circuit.
A housing (30) having an internal flow path (11d) constituting a part of the brake fluid pressure circuit and having one end of the internal flow path (11d) open to the outer surface.
The housing (30) is provided with an accumulator unit (9) attached at a position where one end of the internal flow path ( 11 d) is opened.
The housing (30) has a recess (30e) at a position where one end of the internal flow path (11d) opens.
The accumulator unit (9) is fixed to the recess (30e) and is fixed to the recess (30e).
The accumulator unit (9) is
A piston (55) that receives the brake fluid that flows in through the internal flow path (11d) on the surface on one end side in the axial direction.
An urging member (57) that urges the piston (55) toward one end side.
A sleeve member (53) that reciprocates the piston (55) in the axial direction, and a sleeve member (53) .
The one end side has a base portion (51) fixed to the housing (30) and the other end side has a base portion (51) to which the sleeve member (53) is fixed.
The base portion (51) has a fitting portion (51b) fitted into the recess (30e) of the housing (30).
A capacitance portion (60) including a space formed between an end surface of the base portion (51) on the fitting portion (51b) side and the bottom surface of the recess (30e) of the housing (30) is formed.
Brake fluid pressure control device (70). The brake fluid pressure control device according to claim 1 , wherein at least a part of the sleeve member (53) is arranged outside the position of the outer surface of the housing (30) to which the accumulator unit (9) is attached. The brake fluid pressure control device (70) includes a motor (7) fixed to one outer surface (30a) of the housing (30).
The brake fluid pressure control device according to claim 1 or 2 , wherein the accumulator unit (9) is attached to the outer surface (30a) to which the motor (7) is fixed. The brake fluid pressure control device (70) includes a control unit (40) arranged so as to face one outer surface (30d) of the housing (30).
The brake according to claim 1 or 2 , wherein the accumulator unit (9) is provided on the outer surface (30d) where the control unit (40) is arranged and is arranged inside the control unit (40). Hydraulic pressure control device.

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