TW202402582A - Hydraulic pressure control unit and straddle-type vehicle - Google Patents

Abstract

The invention obtains a hydraulic pressure control unit for a straddle-type vehicle, the hydraulic pressure control unit being mountable to a space where it is difficult to mount a conventional hydraulic pressure control unit. The hydraulic pressure control unit according to the invention is a hydraulic pressure control unit for a brake system mounted to the straddle-type vehicle, and includes: a base body formed with a channel for a brake fluid; a motor as a drive source of a pump that applies a pressure to the brake fluid; an inlet valve opening/closing the channel; and an outlet valve opening/closing the channel. The inlet valve and the outlet valve are provided to a first side surface as one of side surfaces of the base body. The motor is provided to a second side surface, which is different from the first side surface, as one of two side surfaces of the base body, the two side surfaces opposing each other in an alignment direction of the inlet valve and the outlet valve.

Description

Hydraulic control unit and straddle-type vehicle

The present invention relates to a hydraulic control unit for a straddle-type vehicle and a straddle-type vehicle including the hydraulic control unit.

Some existing vehicles include a hydraulic control unit that controls the pressure of brake fluid in a hydraulic circuit filled with brake fluid. For example, when the vehicle occupant operates an input unit such as a brake lever, the hydraulic control unit increases or decreases the pressure of the brake fluid in the hydraulic circuit to adjust the braking force generated by the wheels and perform anti-lock braking control. In the hydraulic control unit as described above, there is a flow path that forms a part of the hydraulic circuit, a motor that is a driving source of a pump that applies pressure to the brake fluid in the flow path, and a hydraulic regulating valve that opens and closes the flow path. etc. (for example, refer to Patent Document 1).

Specifically, the conventional hydraulic control unit that has been unitized includes: a base body in which a flow channel for brake fluid is formed; a motor as a driving source of a pump that applies pressure to the brake fluid in the flow channel; and a controller that opens and closes the flow channel. The inlet valve and the release valve that opens and closes the flow channel. [Prior art documents] [Patent Document]

[Patent Document 1] Japanese Patent Application Publication No. 2014-015077

[Problem to be solved by the invention]

As a type of vehicle, a straddle-type vehicle has a lower degree of freedom in the layout of parts and a lower degree of freedom in mounting a hydraulic control unit compared with vehicles such as a four-wheeled vehicle. Therefore, the existing hydraulic control unit has a problem that it is difficult to install it on a straddle-type vehicle.

The present invention is based on the above-mentioned problems. The first object is to obtain a hydraulic control unit for a straddle-type vehicle that can be installed in a space where it is difficult to install existing hydraulic control units. Furthermore, a second object of the present invention is to obtain a straddle-type vehicle that can include the hydraulic control unit as described above. [Means to solve problems]

The hydraulic control unit of the present invention is a hydraulic control unit mounted on a brake system of a straddle-type vehicle. It includes: a base body formed with a flow path for brake fluid, a motor that is a driving source of a pump that applies pressure to the brake fluid, and the above-mentioned An inlet valve for opening and closing the flow channel, and a release valve for opening and closing the flow channel; the above-mentioned inlet valve and the above-mentioned release valve are arranged on one of the side surfaces of the above-mentioned base body, that is, the first side, and the above-mentioned motor is arranged on a different side from the above-mentioned first side. One of the two side surfaces of the base body facing each other in the arrangement direction of the inlet valve and the release valve is the second side surface.

Furthermore, the straddle type vehicle of the present invention includes the hydraulic control unit of the present invention. [Effects of the invention]

In the hydraulic control unit of the present invention, the inlet valve and the release valve are arranged on the first side of the base body. Furthermore, in the hydraulic control unit of the present invention, the motor is provided on one of the two side surfaces of the base body facing each other in the arrangement direction of the inlet valve and the release valve, that is, the second side surface. Therefore, the hydraulic control unit of the present invention is long in the arrangement direction of the inlet valve and the release valve, which improves the realization of the hydraulic control unit with small width in the arrangement direction and vertical direction. Therefore, the hydraulic control unit of the present invention can be installed in a space that is difficult to install in existing hydraulic control units.

Hereinafter, the hydraulic control unit and the straddle-type vehicle of the present invention will be described using drawings.

In addition, below, the case where the present invention is applied to a motorcycle is described, but the present invention can also be applied to other straddle-type vehicles other than a motorcycle. The so-called straddle-type vehicles other than two-wheeled motorcycles include, for example, automatic tricycles that use at least one of an engine and an electric motor as a driving source, and all-terrain vehicles (buggy). In addition, the so-called straddle-type vehicles other than motorcycles refer to bicycles, for example. Bicycles refer to all vehicles that can be propelled on the road by applying force to the pedals. That is, bicycles include ordinary bicycles, electric-assisted bicycles, electric bicycles, and the like. In addition, a two-wheeled motorcycle or an automatic three-wheeled vehicle means a so-called motorcycle, and motorcycles include motorcycles, scooters, electric scooters, and the like.

In addition, the structure, operation, etc. described below are examples, and the hydraulic control unit and the straddle-type vehicle of the present invention are not limited to the above-described structure, operation, etc. For example, the following shows an example of using a hydraulic control unit to control the pressure of brake fluid in a hydraulic circuit that generates braking force for the front wheels. However, it is not limited to this. For example, a hydraulic control unit may also be used to control the pressure of brake fluid in a hydraulic circuit that generates braking force for the rear wheels. Also, for example, different hydraulic control units may be used to control the pressure of the brake fluid in the hydraulic circuit that generates braking force for the front wheels, and the pressure of the brake fluid in the hydraulic circuit that generates braking force for the rear wheels.

In addition, in each drawing, the same or similar members or parts are given the same symbols, or the symbols are omitted. In addition, regarding small structures, illustrations are appropriately simplified or omitted. In addition, the description of repetition is appropriately simplified or omitted.

Implementation. 〈Construction and operation of brake system for straddle-type vehicles〉 The structure and operation of the braking system of this embodiment will be described. FIG. 1 is a diagram showing the structure of a straddle-type vehicle equipped with a brake system including a hydraulic control unit according to an embodiment of the present invention. FIG. 2 is a diagram showing the structure of a brake system including a hydraulic control unit according to an embodiment of the present invention.

As shown in FIGS. 1 and 2 , the brake system 10 is mounted on a straddle-type vehicle 200 that is a motorcycle, for example. The straddle-type vehicle 200 includes a main body 1, a handle 2 rotatably held on the main body 1, a front wheel 3 rotatably held on the main body 1 together with the handle 2, and a rear wheel 4 rotatably held on the main body 1. Here, the main body 1 includes a main body frame portion that forms the skeleton of the main body 1 . In addition, the main body 1 includes a fairing, a seat cushion, a fuel tank, etc. attached to the main body frame portion. The main body frame part is, for example, a cradle frame, a diamond-shaped frame, a truss, or an aluminum frame. Moreover, the front wheel 3 is held by the main body 1 via the front fork. Moreover, the rear wheel 4 is held by the main body 1 via a rocker arm. In this embodiment, the parts that form the frame of the straddle-type vehicle 200 such as the main body frame portion, the front fork, and the swing arm are collectively referred to as the frame 5 .

The brake system 10 includes a brake lever 11, a first hydraulic circuit 12 filled with brake fluid, a brake pedal 13, and a second hydraulic circuit 14 filled with brake fluid. That is, the brake system 10 includes two hydraulic circuits (the first hydraulic circuit 12 and the second hydraulic circuit 14). The brake lever 11 is provided on the handle 2 and is operated by the user's hand. The first hydraulic circuit 12 generates a braking force corresponding to the operation amount of the brake lever 11 to the rotor 3a that rotates together with the front wheel 3. The brake pedal 13 is provided at the lower part of the main body 1 and is operated by the user's feet. The second hydraulic circuit 14 generates a braking force corresponding to the operation amount of the brake pedal 13 to the rotor 4a that rotates together with the rear wheel 4.

In addition, the brake lever 11 and the brake pedal 13 are examples of input parts of the brake. For example, a brake pedal different from the brake pedal 13 provided on the main body 1 may be used as a brake input unit instead of the brake lever 11 . Furthermore, for example, a brake lever different from the brake lever 11 provided on the handle 2 may be used as a brake input unit instead of the brake pedal 13 . In addition, the first hydraulic circuit 12 can also generate a brake corresponding to the operation amount of the brake lever 11 or the operation amount of a brake pedal different from the brake pedal 13 provided on the main body 1 to the rotor 4a that rotates together with the rear wheel 4. force. In addition, the second hydraulic circuit 14 can also generate a braking force corresponding to the operation amount of the brake pedal 13 or the operation amount of a brake lever different from the brake lever 11 provided on the handle 2 to the rotor 3a that rotates together with the front wheel 3. .

In this embodiment, the hydraulic control unit 100 is used to control the pressure of the brake fluid in the first hydraulic circuit 12 . Therefore, the structure of the first hydraulic circuit 12 of the brake system 10 will be described below. The first hydraulic circuit 12 includes: a master cylinder 21 containing a piston (not shown), a reservoir 22 attached to the master cylinder 21, a brake caliper 23 including a brake pad (not shown), and a brake caliper 23. The brake pad (illustration omitted) operates the wheel cylinder 24.

A brake fluid flow path is formed in the base 80 of the hydraulic control unit 100 provided in the first hydraulic circuit 12 . In this embodiment, the main body 80 is formed with a main channel 30 and a secondary channel 35 as flow channels for brake fluid. The master cylinder 21 and the wheel cylinder 24 are connected through the liquid pipe 25 between the master cylinder 21 and the master cylinder port MP formed on the base body 80, the main flow channel 30 formed on the base body 80, and the wheel cylinder 24 and the wheel cylinder 24 formed on the base body. The liquid pipe 26 between the 80 wheel cylinder port WP is connected. In addition, the brake fluid in the wheel cylinder 24 escapes into the main channel 30 through the secondary flow channel 35 . Specifically, as will be described later, the sprue 30 includes a first sprue 31 and a second sprue 32 . The brake fluid in the wheel cylinder 24 escapes into the first main flow channel 31 through the auxiliary flow channel 35 .

Furthermore, the first hydraulic circuit 12 is provided with a hydraulic pressure regulating valve that opens and closes the flow path of the brake fluid. In this embodiment, the first hydraulic circuit 12 is provided with an inlet valve 41 and a release valve 42 as hydraulic pressure regulating valves. The inlet valve 41 and the release valve 42 open and close the brake fluid flow path formed in the base 80 .

The inlet valve 41 is provided on the main channel 30 . Specifically, the sprue 30 includes a first sprue 31 and a second sprue 32 . The first main flow path 31 communicates with the master cylinder port MP. The second main flow path 32 communicates with the wheel cylinder port WP. Furthermore, the inlet valve 41 is provided between the first main flow path 31 and the second main flow path 32 . The flow rate of the brake fluid flowing between the first main channel 31 and the second main channel 32 is controlled by the opening and closing operation of the inlet valve 41 . Furthermore, the second main flow path 32 is provided with a hydraulic pressure sensor 48 for detecting the pressure of the brake fluid in the wheel cylinder 24 .

The release valve 42 is provided in the auxiliary flow path 35 . Furthermore, the auxiliary flow path 35 is also provided with an accumulator 43 that stores brake fluid, and a pump that applies pressure to the brake fluid in the auxiliary flow path 35 . In this embodiment, the pump is a cycloidal motion pump 45. Specifically, the auxiliary flow channel 35 includes a first auxiliary flow channel 36 , a second auxiliary flow channel 37 , and a third auxiliary flow channel 38 . The first auxiliary flow channel 36 is connected to the second main flow channel 32 of the main flow channel 30 . The third auxiliary flow channel 38 is connected to the first main flow channel 31 of the main flow channel 30 . The second auxiliary flow channel 37 is a flow channel between the first auxiliary flow channel 36 and the third auxiliary flow channel 38 in the auxiliary flow channel 35 . The release valve 42 is provided between the first auxiliary flow channel 36 and the second auxiliary flow channel 37 . The flow rate of the brake fluid flowing between the first auxiliary flow channel 36 and the second auxiliary flow channel 37 is controlled by the opening and closing operation of the release valve 42 . The accumulator 43 is provided in the second auxiliary flow path 37 . The cycloidal motion pump 45 is provided between the second auxiliary flow path 37 and the third auxiliary flow path 38 . The cycloidal motion pump 45 is driven by a motor 60 . That is, the motor 60 is the driving source of the cycloidal motion pump 45 . In addition, a check valve 39 is provided in the third auxiliary flow path 38 . The check valve 39 restricts the flow of brake fluid flowing from the master cylinder 21 through the third auxiliary flow path 38 to the cycloidal motion pump 45 .

That is, the main flow path 30 communicates the master cylinder port MP and the wheel cylinder port WP via the inlet valve 41 . In addition, the auxiliary flow passage 35 is defined as a part or all of the flow passage through which the brake fluid in the wheel cylinder 24 escapes to the master cylinder 21 through the release valve 42 .

The inlet valve 41 is driven by the inlet valve coil 51 . In addition, the release valve 42 is driven by the release valve coil 52 . For example, when the inlet valve coil 51 is in a non-energized state, the inlet valve 41 opens the brake fluid to flow in both directions. Furthermore, when the inlet valve coil 51 is energized, the inlet valve 41 becomes closed and blocks the flow of brake fluid. That is, in this embodiment, the inlet valve 41 is a solenoid valve that opens when power is not supplied. For example, when the release valve coil 52 is in a non-energized state, the release valve 42 blocks the flow of brake fluid. Furthermore, when the release valve coil 52 is energized, the release valve 42 becomes an open state, and the flow of the brake fluid to the accumulator 43 is released. That is, in this embodiment, the release valve 42 is a solenoid valve that is closed when de-energized.

By the base 80 and various components provided on the base 80 (accumulator 43, inlet valve 41, release valve 42, cycloidal motion pump 45, hydraulic sensor 48, inlet valve coil 51, release valve coil 52, motor 60, etc.), and the control unit (ECU) 101 to form the hydraulic control unit 100. When the hydraulic control unit 100 is mounted on the straddle-type vehicle 200 , the hydraulic control unit 100 is mounted on the frame 5 , for example.

There may be one control device 101, or it may be divided into a plurality of control devices. Furthermore, the control device 101 may be mounted on the base 80 or may be mounted on other members other than the base 80 . In addition, part or all of the control device 101 may include, for example, a microcomputer, a microprocessor unit, etc., or may only include updateable firmware, or may be a program module executed according to instructions from a CPU, etc. wait. In addition, in this embodiment, as will be described later, at least a part of the control device 101 is configured as the control substrate 102 .

For example, in the normal state, the control device 101 controls the inlet valve coil 51 and the release valve coil 52 to be in a non-energized state. In this state, if the brake lever 11 is operated, the piston (not shown) of the master cylinder 21 is pressed in the first hydraulic circuit 12, the pressure of the brake fluid in the wheel cylinder 24 increases, and the brake caliper 23 brakes The pad (not shown) is pressed against the rotor 3a of the front wheel 3, and the front wheel 3 is braked.

In the control device 101, the output of each sensor (hydraulic pressure sensor 48, wheel speed sensor, acceleration sensor, etc.) is input. Based on the output, the control device 101 outputs instructions for managing the operations of the motor 60, each valve, etc., and performs anti-lock brake control and the like.

For example, when the pressure of the brake fluid in the wheel cylinder 24 of the first hydraulic circuit 12 is excessive or may be excessive, the control device 101 executes an operation to reduce the pressure of the brake fluid in the wheel cylinder 24 of the first hydraulic circuit 12 . At this time, the control device 101 controls the inlet valve coil 51 to be in the energized state, controls the release valve coil 52 to be in the energized state, and drives the motor 60 in the first hydraulic circuit 12 . By driving the motor 60 , the cycloidal motion pump 45 applies pressure in the direction in which the brake fluid flows from the second auxiliary flow channel 37 to the third auxiliary flow channel 38 to the brake fluid in the auxiliary flow channel 35 . This generates a flow in which the brake fluid flows from the second main flow path 32 of the main flow path 30 into the auxiliary flow path 35 . Furthermore, the brake fluid flowing into the auxiliary flow channel 35 from the second main flow channel 32 of the main flow channel 30 is stored in the accumulator 43 . Thereby, the hydraulic control unit 100 can reduce the pressure of the brake fluid in the wheel cylinder 24 of the first hydraulic circuit 12 and execute anti-lock braking control of the first hydraulic circuit 12 .

〈Construction of hydraulic control unit〉 3 is a perspective view showing the base of the hydraulic control unit according to the embodiment of the present invention. 4 is a perspective view showing a state in which an inlet valve, a release valve, and a motor are provided on a base body of the hydraulic control unit according to the embodiment of the present invention. Moreover, FIG. 5 is a cross-sectional view of the hydraulic control unit of the present invention. In addition, in FIG. 5 , illustration of the main flow channel 30 and the auxiliary flow channel 35 formed in the base 80 is omitted. Regarding the main flow channel 30 and the auxiliary flow channel 35, please refer to Figure 2.

The base 80 is made of metal such as aluminum alloy, for example, and has a substantially rectangular parallelepiped shape. In addition, each side surface of the base 80 may be flat, may include a curved portion, or may include a step.

The base 80 is provided with an inlet valve 41 and a release valve 42 on the first side 81 which is one of the side surfaces. In the hydraulic control unit 100 of this embodiment, the inlet valve 41 and the release valve 42 are provided on the first side 81 of the base 80 as described below.

The base 80 is formed with an inlet valve recess 96 opening on the first side surface 81 . In the recessed portion 96 for the inlet valve, the first main flow path 31 and the second main flow path 32 shown in FIG. 2 among the brake fluid flow paths formed in the base 80 are connected to each other. The inlet valve 41 is provided in the inlet valve recess 96 . As the valve body reciprocates in the inlet valve 41, the space between the first main flow path 31 and the second main flow path 32 is opened and closed. Furthermore, in a state where the inlet valve 41 is installed in the inlet valve recess 96 , a part of the inlet valve 41 protrudes from the opening of the inlet valve recess 96 to the outside of the base 80 . The inlet valve coil 51 , which is the driving source of the inlet valve 41 , is provided on the first side surface 81 of the base body 80 so as to surround the portion of the inlet valve 41 that protrudes toward the outside of the base body 80 .

Furthermore, the base 80 is formed with a recessed portion 97 for a release valve that opens on the first side surface 81 . In the recessed portion 97 for the release valve, the first auxiliary flow path 36 and the second auxiliary flow path 37 shown in FIG. 2 among the brake fluid flow paths formed in the base 80 are connected to each other. The release valve 42 is provided in the release valve recess 97 . By reciprocating the valve body in the release valve 42, the first auxiliary flow path 36 and the second auxiliary flow path 37 are opened and closed. In addition, in a state where the release valve 42 is provided in the release valve recess 97 , a part of the release valve 42 protrudes from the opening of the release valve recess 97 to the outside of the base 80 . The release valve coil 52 , which is the driving source of the release valve 42 , is provided on the first side surface 81 of the base body 80 so as to surround the portion of the release valve 42 that protrudes toward the outside of the base body 80 .

Here, when describing the hydraulic control unit 100, the X direction, the Y direction, and the Z direction are defined as follows. Let the arrangement direction of the inlet valve 41 and the release valve 42 be the X direction. Among the directions perpendicular to the X direction, the direction parallel to the normal line of the first side surface 81 is defined as the Z direction. Let the direction perpendicular to the X direction and Z direction be the Y direction.

When the X direction is defined in the above manner, the base 80 includes two side surfaces that are opposite to the X direction in which the inlet valve 41 and the release valve 42 are arranged, as side surfaces different from the first side surface 81 . Furthermore, the motor 60 is provided on the second side surface 82 , which is one of the two side surfaces facing the X direction.

A conventional hydraulic control unit is configured in a substantially cubic shape. In addition, straddle-type vehicles, which are one type of vehicles, have a lower degree of freedom in the layout of parts and a lower degree of freedom in mounting a hydraulic control unit than vehicles such as four-wheeled vehicles. Therefore, it is difficult to install the existing hydraulic control unit on a straddle-type vehicle. On the other hand, by arranging the inlet valve 41, the release valve 42 and the motor 60 on the base 80 like the hydraulic control unit 100 of this embodiment, the length in the X direction and the width in the Y and Z directions are small. Implementation of the hydraulic control unit 100. Thereby, for example, there is a case where the hydraulic control unit 100 can be installed on the frame 5 along the frame 5 in the X direction. That is, the hydraulic control unit 100 of this embodiment can be installed in a space that is difficult to install existing hydraulic control units.

In addition, in the hydraulic control unit 100 of this embodiment, the X direction becomes the longitudinal direction of the base 80 . That is, the inlet valve 41 and the release valve 42 are arranged along the longitudinal direction of the base 80 . Thereby, the width of the hydraulic control unit 100 in the Y direction and the Z direction can be further suppressed. That is, the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit is improved.

Here, in the hydraulic control unit 100 of this embodiment, the motor 60 is provided on the second side surface 82 of the base 80 as described below. In addition, below, the structures surrounding the motor 60 in the hydraulic control unit 100 will be collectively described.

The motor 60 includes an electric part 61 . Furthermore, the electric unit 61 includes a stator 62 and a rotor 63 . A substantially cylindrical through hole is formed in the stator 62 . The rotor 63 is formed in a substantially cylindrical shape, and is disposed in a through hole of the stator 62 so as to be rotatable relative to the stator 62 . When the control device 101 controls the coil (not shown) of the stator 62 to be energized, a current flows through the coil to generate a magnetic field. This magnetic field acts on the rotor 63, causing the rotor 63 to rotate.

In addition, the motor 60 includes a drive shaft 64 . The drive shaft 64 is fixed to the rotor 63 and transmits the driving force of the electric part 61 to one of the gears constituting the cycloidal motion pump 45 . Here, the existing hydraulic control unit uses a piston pump as a pump that applies pressure to the brake fluid. On the other hand, the hydraulic control unit 100 of this embodiment uses the cycloidal motion pump 45 as a pump that applies pressure to the brake fluid. By using the cycloidal motion pump 45 as a pump that applies pressure to the brake fluid, the torque required for the pump-driving motor is reduced compared to the case of using a piston pump as a pump that applies pressure to the brake fluid. That is, compared with the conventional hydraulic control unit, the hydraulic control unit 100 of this embodiment can use a smaller motor as the motor 60 that serves as the driving source of the pump. Therefore, the hydraulic control unit 100 of this embodiment is more likely to suppress the width in the Y direction and the Z direction. That is, the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit is improved.

Furthermore, when comparing the case of using a piston pump as a pump that applies pressure to the brake fluid and the case of using the cycloidal motion pump 45, the dimensions of the cycloid motion pump 45 in the direction perpendicular to the drive shaft 64 of the motor 60 decrease. Therefore, by configuring the cycloidal motion pump 45 as a pump that applies pressure to the brake fluid, the width of the hydraulic control unit 100 in the Y direction and the Z direction can be further suppressed. That is, the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit is improved.

In addition, compared with the existing hydraulic control unit, the hydraulic control unit 100 of this embodiment can use a smaller motor 60, so the cost of the motor 60 can also be reduced.

The motor 60 configured in the above manner includes a motor cover 65 provided outside the electric part 61 . The motor cover 65 is formed in a substantially cylindrical shape, for example. Furthermore, the motor cover 65 includes a motor cover flange 66 protruding outward from the outer peripheral surface of the motor cover 65 . On the other hand, the base 80 is formed with a motor recess 91 that is opened in the second side surface 82 and accommodates at least a part of the motor 60 . Furthermore, a plastic deformation portion 92 is formed on the inner peripheral surface of the motor recessed portion 91 . The plastic deformation portion 92 of this embodiment is a step portion that offsets the inner peripheral surface of the motor recess 91 in a direction away from the outer peripheral surface of the motor cover 65 . For example, the plastic deformation portions 92 are arranged at intervals of 90° on the inner peripheral surface of the motor recess 91 .

When the motor 60 is fixed to the base 80 , the motor 60 is inserted into the motor recess 91 . In this state, a jig is inserted from above into the space on the outer circumferential side of the motor cover 65 in the motor recess 91, and the jig plastically deforms the upper surface of the plastic deformation portion 92 by applying pressure. As a result, the plastically deformed portion 92 deforms so as to cover the upper surface of the motor cover flange 66 , that is, a portion of the end surface on the opening side of the motor recess 91 in the motor cover flange 66 . Thereby, the motor cover flange 66 of the motor cover 65 is clamped by the plastic deformation portion 92 formed on the inner peripheral surface of the motor recess 91 and the bottom of the motor recess 91 , and the motor 60 is fixed to the base 80 . That is, the motor 60 is fixed to the base 80 using rivets. By using rivets to fix the motor 60 to the base 80 as described above, compared with the case where the motor 60 is fixed to the base 80 by bolts, the bolts used to fix the motor 60 are no longer needed, and there is no need to tighten the motor 60 . The internal thread portion into which the bolt is screwed is formed on the base body 80 . Therefore, by fixing the motor 60 to the base 80 with rivets as described above, the width of the hydraulic control unit 100 in the Y direction and the Z direction can be further reduced. That is, the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit is improved.

In addition, the motor cover flange 66 may be directly clamped by the plastic deformation part 92 and the bottom of the motor recess 91 , or may be indirectly clamped. The term "motor cover flange 66 is directly held between the plastic deformation part 92 and the bottom" means that only the motor cover flange 66 is held between the plastic deformation part 92 and the bottom. In addition, the term "motor cover flange 66 is indirectly sandwiched by the plastic deformation part 92 and the bottom" means that the motor cover flange 66 and other components are sandwiched by the plastic deformation portion 92 and the bottom.

However, the cycloidal motion pump 45 includes an outer rotor 46 and an inner rotor 47 . The outer rotor 46 is an internally toothed gear. The inner rotor 47 is a gear with external teeth, and is disposed on the inner circumferential side of the outer rotor 46 to mesh with the outer rotor 46 . Furthermore, the drive shaft 64 of the motor 60 is connected to the inner rotor 47 . Furthermore, when the rotor 63 rotates in the electric part 61 of the motor 60, the drive shaft 64 fixed to the rotor 63 rotates. Thereby, the inner rotor 47 connected to the drive shaft 64 and the outer rotor 46 engaged with the inner rotor 47 rotate, thereby applying pressure to the brake fluid existing between the inner rotor 47 and the outer rotor 46 .

At this time, part of the brake fluid pressured between the inner rotor 47 and the outer rotor 46 leaks toward the electric part 61 along the drive shaft 64 of the motor 60 . Therefore, the hydraulic control unit 100 of this embodiment includes a sealing ring 75 and a support block 70 . The support block 70 is arranged between the electric part 61 of the motor 60 and the cycloidal motion pump 45 to hold the sealing ring 75 . The support block 70 is formed in a substantially cylindrical shape, for example. The sealing ring 75 is inserted into the drive shaft 64 of the motor 60 to seal the outer peripheral portion of the drive shaft 64 . By including the seal ring 75 and the support block 70 , a part of the brake fluid that is pressurized between the inner rotor 47 and the outer rotor 46 can be suppressed from leaking to the electric part 61 . In other words, by including the seal ring 75 and the support block 70 , the brake fluid can be suppressed from leaking from the secondary flow path 35 to the outside of the first hydraulic circuit 12 . Therefore, by including the sealing ring 75 and the support block 70 , the accuracy of controlling the pressure of the brake fluid in the wheel cylinder 24 is improved.

In addition, in the hydraulic control unit 100 of this embodiment, the seal ring 75 is held by the support block 70 as described below. The support block 70 is formed with a seal ring recess 71 that opens toward the electric portion 61 of the motor 60 , for example. The seal ring 75 is at least partially fitted into the seal ring recess 71 . Thereby, the sealing ring 75 is held on the support block 70 . When the sealing ring 75 is held by the support block 70 as described above, the sealing ring 75 may be squeezed by the brake fluid flowing from the cycloidal motion pump 45 to the sealing ring 75 , and the sealing ring may be squeezed from the recessed portion of the sealing ring 75 . The possibility of falling off in 71. Therefore, the hydraulic control unit 100 of this embodiment includes the pressing plate 76 that presses the seal ring 75 from the opening side of the seal ring recess 71 .

Furthermore, the pressing plate 76 is held between the motor 60 and the support block 70 . By fixing the extrusion plate 76 as described above, the motor 60 and the support block 70 are assembled, whereby the extrusion plate 76 can be fixed. Therefore, by fixing the extrusion plate 76 as described above, the man-hours for tightening the bolts of the extrusion plate 76 on the support block 70 can be reduced, and the man-hours for assembling the hydraulic control unit 100 can be reduced. As a result, the cost of the hydraulic control unit 100 can be reduced.

Furthermore, in the hydraulic control unit 100 of this embodiment, the outer peripheral surface of the support block 70 is fitted to the inner peripheral surface of the motor cover 65 . With the above-described structure, the support block 70 is inserted into the motor cover 65, and the outer peripheral surface of the support block 70 is fitted into the inner peripheral surface of the motor cover 65, so that the drive shaft 64 of the motor 60 can be moved. Alignment with sealing ring 75. Therefore, by configuring as described above, the alignment of the drive shaft 64 of the motor 60 and the seal ring 75 becomes easy.

Furthermore, in order to improve the reliability of suppressing the leakage of brake fluid by the seal ring 75, it is important to align the axis center of the drive shaft 64 and the center of the seal ring 75 as accurately as possible. At this time, by setting the outer circumferential surface of the support block 70 to fit into the inner circumferential surface of the motor cover 65, parts are sandwiched between the motor 60 and the seal ring 75 for the purpose of aligning the drive shaft 64 and the seal ring 75. There is only the support block 70 . Therefore, by configuring the outer circumferential surface of the support block 70 to fit into the inner circumferential surface of the motor cover 65, the positional accuracy of the seal ring 75 with respect to the drive shaft 64 becomes good, and the use of the seal ring 75 improves the accuracy of the position. The certainty of suppressing brake fluid leakage.

Moreover, in the hydraulic control unit 100 of this embodiment, the support block 70 includes the support block flange 72 protruding outward from the outer peripheral surface of the support block 70 . Furthermore, in the hydraulic control unit 100 of this embodiment, the motor cover flange 66 and the support block flange 72 are sandwiched between the plastic deformation portion 92 and the bottom of the motor recess 91 to fix the motor 60 and the support block 70 to the base 80 . With the structure as described above, both the motor 60 and the support block 70 can be fixed to the base 80 in one rivet operation, thereby reducing the assembly man-hours of the hydraulic control unit 100. As a result, the cost of the hydraulic control unit 100 can be reduced.

Furthermore, in the hydraulic control unit 100 of this embodiment, a pump recess 93 is formed at the bottom of the motor recess 91 of the base 80 . The second auxiliary flow path 37 and the third auxiliary flow path 38 are connected to the pump recess 93 . Furthermore, the cycloidal motion pump 45 is housed in the pump recess 93 . Thereby, the cycloidal motion pump 45 is provided between the second auxiliary flow path 37 and the third auxiliary flow path 38 . Furthermore, in the hydraulic control unit 100 of this embodiment, the lower surface of the support block 70 contacts the bottom of the motor recess 91 and covers the opening of the pump recess 93 .

When the lower surface of the support block 70 contacts the bottom of the motor recess 91 , the installation angle of the drive shaft 64 of the motor 60 is affected by the flatness of the lower surface of the support block 70 . Therefore, the lower surface of the support block 70 is preferably highly flat. On the other hand, in order to prevent the brake fluid that is pressurized by the cycloid pump 45 from leaking out of the cycloid pump 45 , a gap between the component covering the opening of the pump recess 93 and the cycloid pump 45 becomes important. . Specifically, the gap between the component covering the opening of the pump recess 93 and the cycloidal motion pump 45 is preferably as small as possible within the rotatable range of the outer rotor 46 and the inner rotor 47 . Therefore, it is also preferable that the parts covering the opening of the pump recess 93 have high flatness.

Here, the lower surface of the support block 70 is in contact with the bottom of the motor recess 91 to cover the opening of the pump recess 93. The lower surface of the support block 70 processed to have a high flatness can be used as the structure. A part that covers the opening of the pump recess 93. Therefore, parts requiring high flatness can be collected and the number of parts can be reduced, so that the cost of the hydraulic control unit 100 can be reduced. Furthermore, in the hydraulic control unit 100 of this embodiment, an O-ring 77 is provided between the lower surface of the support block 70 and the bottom of the motor recess 91 . Therefore, the O-ring 77 can be used to prevent brake fluid from leaking out of the first hydraulic circuit 12 from between the lower surface of the support block 70 and the bottom of the motor recess 91 .

Furthermore, in the hydraulic control unit 100 of this embodiment, a drive shaft recess 94 is formed at the bottom of the pump recess 93 . Furthermore, a midway portion of the drive shaft 64 of the motor 60 is connected to one of the gears constituting the cycloidal motion pump 45 (the inner rotor 47 in this embodiment), and the front end portion is rotatably inserted into the drive shaft recess 94 . Brake fluid flows into the drive shaft recess 94 formed at the bottom of the pump recess 93 . Therefore, the drive shaft recess 94 can use the brake fluid as lubricating oil and function as a sliding bearing that rotatably supports the front end of the drive shaft 64 of the motor 60 . Therefore, by rotatably inserting the front end of the drive shaft 64 into the drive shaft recess 94 formed at the bottom of the pump recess 93, the ball bearing supporting the front end of the drive shaft 64 is no longer necessary. Therefore, the cost of the hydraulic control unit 100 can be reduced by rotatably inserting the front end portion of the drive shaft 64 into the drive shaft recess 94 formed at the bottom of the pump recess 93 .

Furthermore, the base 80 is formed with a master cylinder port MP and a wheel cylinder port WP. As described above, the master cylinder port MP is connected to the liquid pipe 25 that communicates with the main channel 30 and the master cylinder 21 . In addition, the wheel cylinder port WP is connected to the liquid pipe 26 that communicates with the main flow path 30 and the wheel cylinder 24 . In the hydraulic control unit 100 of this embodiment, the master cylinder port MP and the wheel cylinder port WP are opened on the side surface 83 of the side surface of the base body 80 that is connected to the first side surface 81 and the second side surface 82 . In addition, as shown in FIG. 2 , only the brake fluid flow path of one system of hydraulic circuits (the first hydraulic circuit 12 ) is formed in the base 80 . Therefore, only one master cylinder port MP and one wheel cylinder port WP are formed in the base body 80 .

When the hydraulic control unit 100 is mounted on the straddle-type vehicle 200, as a mounting space for the hydraulic control unit 100, not only a space for installing the hydraulic control unit 100 is required, but also a liquid pipe 25 and a liquid pipe 26 connected to the hydraulic control unit 100. configuration space. Here, the hydraulic control unit usually arranges the control substrate constituting at least a part of the control device at a position opposite to the base body with respect to the inlet valve and the release valve. In the hydraulic control unit 100 of this embodiment, the control substrate 102 is also disposed at a position opposite to the base 80 with respect to the inlet valve 41 and the release valve 42 . In addition, generally, in a hydraulic control unit, the inlet valve, release valve, control substrate, etc. are covered by a casing. In the hydraulic control unit 100 of this embodiment, the inlet valve 41 , the release valve 42 and the control substrate 102 are also covered by the housing 110 .

Therefore, in the hydraulic control unit 100, the size in the Z direction in which the inlet valve 41 and the release valve 42 are opposed to the control substrate 102 is likely to be larger than the size in the Y direction. Here, by opening the master cylinder port MP and the wheel cylinder port WP in the side surface 83 , the liquid pipe 25 and the liquid pipe 26 connected to the hydraulic control unit 100 face the hydraulic control unit 100 in the Y direction. Therefore, by opening the master cylinder port MP and the wheel cylinder port WP in the side surface 83 , the installation space of the hydraulic control unit 100 can be reduced in consideration of the arrangement space of the liquid pipe 25 and the liquid pipe 26 . That is, the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit is improved.

Furthermore, the base 80 is provided with an accumulator 43 . The accumulator 43 is disposed on one of the side surfaces 84 of the base 80 . The side surface 84 is the side surface opposite to the second side surface 82 in the X direction in the arrangement direction of the inlet valve 41 and the release valve 42 . Specifically, the base 80 is formed with an accumulator recess 98 opening on the side surface 84 . The accumulator recessed portion 98 is a recessed portion constituting the accumulator 43 . The opening of the accumulator recess 98 is closed with a cover 99 . Thereby, the accumulator 43 is formed inside the accumulator recess 98 . Furthermore, in the hydraulic control unit 100 of this embodiment, the accumulator 43 is provided with a piston 43 a and a spring 43 b in order to squeeze the brake fluid stored in the accumulator 43 out of the accumulator 43 . The piston 43a is accommodated in the accumulator 43 so that it can reciprocate freely. The spring 43b presses the piston 43a in a direction to squeeze the brake fluid stored in the accumulator 43 out of the accumulator 43.

The accumulator recess 98 constituting the accumulator 43 requires a certain size in the depth direction. Therefore, the base 80 is easily enlarged in the depth direction of the accumulator recess 98 . At this time, by disposing the accumulator 43 on the side surface 84 of the base 80, the accumulator recess 98 opens on the side surface 84, and the X direction, which is the arrangement direction of the inlet valve 41 and the release valve 42, becomes the depth direction. Therefore, by disposing the accumulator 43 on the side surface 84 of the base 80 , the width of the hydraulic control unit 100 in the Y direction and the Z direction can be further suppressed. That is, the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit is improved.

〈Effect of hydraulic control unit〉 The effect of the hydraulic control unit 100 of this embodiment will be described.

The hydraulic control unit 100 of this embodiment is a hydraulic control unit mounted on the brake system 10 of the straddle-type vehicle 200 . The hydraulic control unit 100 includes a base 80 formed with a flow path for brake fluid, a motor 60 that is a driving source of a pump that applies pressure to the brake fluid, an inlet valve 41 that opens and closes the flow path, and a release valve 42 that opens and closes the flow path. The inlet valve 41 and the release valve 42 are provided on one of the side surfaces of the base 80 , that is, the first side surface 81 . Furthermore, the motor 60 is provided on the second side 82 , which is one of the two side surfaces of the base 80 that faces the arrangement direction of the inlet valve 41 and the release valve 42 , which is different from the first side surface 81 .

The hydraulic control unit 100 constructed in the above manner improves the realization of the hydraulic control unit 100 which is longer in the X direction in which the inlet valve 41 and the release valve 42 are arranged, and has a smaller width in the Y direction and Z direction perpendicular to the X direction. sex. Thereby, the hydraulic control unit 100 of this embodiment can be installed in a space that is difficult to install in existing hydraulic control units.

Preferably, the hydraulic control unit 100 includes a cycloidal motion pump 45 as a pump that applies pressure to the brake fluid. The hydraulic control unit 100 configured in the above manner can further suppress the width in the Y direction and the Z direction. That is, the hydraulic control unit 100 configured in the above manner improves the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit.

Preferably, the base 80 is formed with a master cylinder port MP and a wheel cylinder port WP. The master cylinder port MP is connected to the liquid pipe 25 connected to the main flow channel 30 and the master cylinder 21 . In addition, the wheel cylinder port WP is connected to the liquid pipe 26 that communicates with the main flow path 30 and the wheel cylinder 24 . Furthermore, the master cylinder port MP and the wheel cylinder port WP are opened in the side surface 83 of the side surface of the base body 80 that is connected to the first side surface 81 and the second side surface 82 . In the hydraulic control unit 100 configured as described above, the installation space of the hydraulic control unit 100 can be reduced in consideration of the arrangement space of the liquid pipe 25 and the liquid pipe 26 . That is, the hydraulic control unit 100 configured in the above manner improves the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit.

Preferably, the accumulator 43 for storing brake fluid is disposed on the side 84 of the side of the base 80 opposite to the second side 82 in the direction in which the inlet valve 41 and the release valve 42 are arranged, that is, in the X direction. The hydraulic control unit 100 configured in the above manner can further suppress the width in the Y direction and the Z direction. That is, the hydraulic control unit 100 configured in the above manner improves the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit.

Preferably, the inlet valve 41 and the release valve 42 are arranged along the longitudinal direction of the base 80 . The hydraulic control unit 100 configured in the above manner can further suppress the width in the Y direction and the Z direction. That is, the hydraulic control unit 100 configured in the above manner improves the feasibility of installing the hydraulic control unit 100 of this embodiment in a space that is difficult to install in a conventional hydraulic control unit.

The embodiments have been described above, but the present invention is not limited to the description of the embodiments. For example, the present invention may be implemented by only a part of the description of the embodiments. Furthermore, for example, the present invention can also use a hydraulic control unit to control the pressure of the brake fluid in the hydraulic circuit that generates braking force for the rear wheels. Furthermore, for example, different hydraulic control units may be used to control the pressure of the brake fluid in the hydraulic circuit that generates braking force for the front wheels, and the pressure of the brake fluid in the hydraulic circuit that generates braking force for the rear wheels.

1:Subject 2: handle 3:Front wheel 3a:Rotor 4: Rear wheel 4a:Rotor 5:Framework 10: Braking system 11:brake lever 12: 1st hydraulic circuit 13:brake pedal 14: 2nd hydraulic circuit 21:Master cylinder 22:Storage 23: Brake caliper 24:Wheel cylinder 25:Liquid pipe 26:Liquid pipe 30: Main channel 31: 1st main channel 32: 2nd main channel 35: Auxiliary flow channel 36: 1st auxiliary flow channel 37: Second runner 38: The third auxiliary flow channel 39: Check valve 41:Import valve 42:Release valve 43: Accumulator 43a:Piston 43b:Spring 45: Cycloidal motion pump 46:Outer rotor 47:Inner rotor 48:Hydraulic sensor 51: Coil for imported valve 52: Coil for release valve 60: Motor 61:Electric department 62:Stator 63:Rotor 64: Drive shaft 65:Motor cover 66: Motor cover flange 70: Support block 71: Recessed part for sealing ring 72: Support block flange 75:Sealing ring 76:Extrusion board 77:O-ring 80:Matrix 81: Side 1 82: Side 2 83:Side 84:Side 91: Recessed part for motor 92:Plastic deformation department 93: Pump concave part 94: Recessed part for drive shaft 96: Recessed part for inlet valve 97:Recess for release valve 98: Recessed part for accumulator 99: cover 100:Hydraulic control unit 101:Control device 102:Control substrate 110: Shell 200: Straddle type vehicle MP: Master cylinder port WP: wheel cylinder port

[Fig. 1] is a diagram showing the structure of a straddle-type vehicle equipped with a brake system including a hydraulic control unit according to an embodiment of the present invention. [Fig. 2] is a diagram showing the structure of a brake system including a hydraulic control unit according to an embodiment of the present invention. [Fig. 3] is a perspective view showing the base of the hydraulic control unit according to the embodiment of the present invention. [Fig. 4] Fig. 4 is a perspective view showing a state in which an inlet valve, a release valve, and a motor are provided on a base body of the hydraulic control unit according to the embodiment of the present invention. [Fig. 5] is a cross-sectional view of the hydraulic control unit of the present invention.

41:Import valve

42:Release valve

43: Accumulator

60: Motor

80:Matrix

81: Side 1

82: Side 2

83:Side

84:Side

96: Recessed part for inlet valve

97:Recess for release valve

98: Recessed part for accumulator

99: cover

100:Hydraulic control unit

MP: Master cylinder port

WP: wheel cylinder port

Claims (8)

A hydraulic control unit (100), which is a hydraulic control unit (100) mounted on the braking system (10) of a straddle-type vehicle (200), and includes: A base body (80) forming a brake fluid flow channel (30, 35), The driving source of the pump that applies pressure to the brake fluid is the motor (60), The inlet valve (41) that opens and closes the above-mentioned flow channel (30), and A release valve (42) that opens and closes the above-mentioned flow channel (35); The above-mentioned inlet valve (41) and the above-mentioned release valve (42) are provided on one of the side surfaces of the above-mentioned base body (80), that is, the first side surface (81); The motor (60) is provided on two side surfaces of the base body (80) that are different from the first side surface (81) and are opposite in the arrangement direction (X) of the inlet valve (41) and the release valve (42). One of them is the second side (82). The hydraulic control unit (100) of claim 1 is provided with a cycloidal motion pump (45) as the above-mentioned pump. Such as the hydraulic control unit (100) of claim 1 or 2, wherein, Formed on the above-mentioned base body (80) are: a master cylinder port (MP), connected to the liquid pipe (25) connected to the above-mentioned flow channel (30) and connected to the master cylinder (21); and a wheel cylinder port (WP), connected to the The liquid pipe (26) connected to the above-mentioned flow channel (30) and connected to the wheel cylinder (24); The above-mentioned master cylinder port (MP) and the above-mentioned wheel cylinder port (WP) are opened in the side surface (83) of the side surface of the above-mentioned base body (80) that is connected to the above-mentioned first side surface (81) and the above-mentioned second side surface (82). Such as the hydraulic control unit (100) of claim 3, wherein, Only one master cylinder port (MP) and one wheel cylinder port (WP) are formed on the base body (80). For example, the hydraulic control unit (100) of claim 1 or 2 has an accumulator (43) for storing brake fluid; The accumulator (43) is provided on the side surface (84) of the side surface of the base body (80) that is opposite to the second side surface (82) in the arrangement direction (X). Such as the hydraulic control unit (100) of claim 1 or 2, wherein, The above-mentioned inlet valve (41) and the above-mentioned release valve (42) are arranged along the longitudinal direction of the above-mentioned base body (80). A straddle-type vehicle (200), which is provided with the hydraulic control unit (100) of claim 1 or 2. For example, the straddle-type vehicle (200) in claim 7, wherein, The above-mentioned hydraulic control unit (100) is installed on the frame (5) of the straddle-type vehicle (200).