Hydraulic pressure control unit, straddle-type vehicle, and hydraulic pressure control unit manufacturing method

Abstract

A hydraulic control unit for motorcycles can be made that is more compact than conventional hydraulic control units. The hydraulic control unit of the present invention is mounted on a motorcycle and is a hydraulic control unit for a braking system capable of performing anti-lock braking control. It comprises: a base having an internal flow channel that connects the wheel cylinder and the master cylinder; and a resin housing housing a control board that controls the operation of a hydraulic adjustment valve for opening and closing the aforementioned internal flow channel; the housing comprises: a main body housing the aforementioned control board; and a plurality of wrists extending from the aforementioned main body toward the aforementioned base and facing the sides of the aforementioned base; each of the aforementioned wrists has a heat-riveted portion connected to the aforementioned base.

Description

[Technical Field]

[0001] The present invention relates to a hydraulic control unit mounted on a motorcycle, a motorcycle having the hydraulic control unit, and a method for manufacturing the hydraulic control unit mounted on a motorcycle. [Previous Technology]

[0002] Conventional vehicles include a hydraulic control unit that controls the pressure of brake fluid in a hydraulic circuit filled with brake fluid. This hydraulic control unit, for example, adjusts the braking force on the wheels by increasing or decreasing the pressure of the brake fluid in the hydraulic circuit when the vehicle is operated, such as by the brake lever, to implement anti-lock braking control. This hydraulic control unit includes: a base having an internal flow channel connecting the wheel cylinder and the master cylinder; and a resin housing housing a control board that controls the operation of a hydraulic adjustment valve for opening and closing the internal flow channel. Furthermore, conventional hydraulic control units are fixed to the base and housing by screws located at the four corners (e.g., Patent Document 1). [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-083167 [Summary of the Invention]

[0004] [Problem to be Solved by the Invention] Compared to vehicles such as four-wheeled vehicles, the freedom of component layout is relatively low for a type of vehicle called a motorcycle, and the freedom of mounting the hydraulic control unit is also low. Therefore, the demand for miniaturization of the hydraulic control unit mounted on motorcycles is increasing. However, conventional hydraulic control units have the problem of difficulty in miniaturization because space must be ensured for mounting screws at the four corners.

[0005] In view of the above-mentioned problems, the present invention aims firstly to provide a hydraulic control unit for a motorcycle that is more miniaturized than conventional hydraulic control units. Secondly, the present invention aims secondly to provide a motorcycle equipped with such a hydraulic control unit. Thirdly, the present invention aims thirdly to provide a method for manufacturing a hydraulic control unit for a motorcycle that is more miniaturized than conventional hydraulic control units.

[0006] The hydraulic control unit of the present invention is mounted on a motorcycle and is a hydraulic control unit of a braking system capable of performing anti-lock braking control. It comprises: a base having an internal flow channel that connects the wheel cylinder and the master cylinder; and a resin housing housing a control board that controls the operation of a hydraulic adjustment valve for opening and closing the aforementioned internal flow channel; the aforementioned housing comprises: a body portion housing the aforementioned control board; and a plurality of wrist portions extending from the aforementioned body portion toward the aforementioned base and facing the side of the aforementioned base respectively; each of the aforementioned wrist portions has a heat-riveting portion connected to the aforementioned base.

[0007] In addition, the straddle-type vehicle of the present invention is equipped with the hydraulic control unit of the present invention.

[0008] Furthermore, the manufacturing method of the hydraulic control unit of the present invention is a method for manufacturing a hydraulic control unit for a braking system mounted on a motorcycle and capable of performing anti-lock braking control. The hydraulic control unit comprises: a base having an internal flow channel that connects the wheel cylinder and the master cylinder; and a resin housing housing a control board that controls the operation of a hydraulic adjustment valve for opening and closing the internal flow channel; the housing comprises: a body portion housing the control board; and a plurality of wrist portions extending from the body portion toward the base and facing the side of the base portion respectively; the manufacturing method of the hydraulic control unit includes a hot riveting step of performing a hot riveting process on each of the wrist portions to fix the base and the housing.

[0009] [Effects of the Invention] The present invention provides a hydraulic control unit for a motorcycle that is more miniaturized than conventional hydraulic control units, a motorcycle equipped with the hydraulic control unit, and a method for manufacturing the hydraulic control unit.

Implementation Method

[0011] The hydraulic control unit of the present invention and the straddle-type vehicle are described below using drawings. Although the following description focuses on an example of an automatic two-wheeled vehicle in which the hydraulic control unit of the present invention is mounted, the hydraulic control unit of the present invention can also be mounted on other straddle-type vehicles besides automatic two-wheeled vehicles. Other straddle-type vehicles besides automatic two-wheeled vehicles include bicycles (e.g., two-wheeled vehicles, three-wheeled vehicles, etc.), automatic three-wheeled vehicles that use at least one of an engine and an electric motor as a drive source, and buggies, etc. Furthermore, the term "bicycle" refers to all means of transportation that can be propelled on a road by pedaling force. That is, bicycles include ordinary bicycles, electric-assisted bicycles, electric bicycles, etc. Also, "automatic two-wheeled vehicle" or "automatic three-wheeled vehicle" refers to a motorcycle, which includes heavy motorcycles, scooters, electric scooters, etc.

[0012] Furthermore, although the following description pertains to a braking system employing the hydraulic control unit of the present invention in a braking system having one hydraulic circuit, the number of hydraulic circuits in a braking system employing the hydraulic control unit of the present invention is not limited to one system. A braking system employing the hydraulic control unit of the present invention may also have two or more hydraulic circuits.

[0013] Furthermore, the structure and operation described below are examples only, and the present invention is not limited to the structure and operation described above. Also, in the figures, the same or similar components or parts may be labeled with the same symbol, or the symbol may be omitted. Furthermore, regarding minute details, the illustrations may be appropriately simplified or omitted.

[0014] Embodiment <Structure and Operation of Braking System for Straddle-Type Vehicle> The structure and operation of a braking system equipped with the hydraulic control unit of this embodiment will be described. Figure 1 is a diagram showing the structure of a straddle-type vehicle equipped with a braking system equipped with the hydraulic control unit of this embodiment. Figure 2 is a diagram showing the structure of a braking system equipped with the hydraulic control unit of this embodiment.

[0015] As shown in Figures 1 and 2, the braking system 10 is mounted on the motorcycle 200. The motorcycle 200 may be, for example, an automatic two-wheeled vehicle driven by an engine, or an automatic two-wheeled vehicle driven by an electric motor. In Figure 1, the motorcycle 200 includes: a main body 1, a handlebar 2 rotatably held on the main body 1, a front wheel 3 rotatably held on the main body 1 together with the handlebar 2, and a rear wheel 4 rotatably held on the main body 1.

[0016] In Figure 2, the braking system 10 includes: a brake lever 11 and a hydraulic circuit 12 filled with brake fluid. The brake lever 11 is mounted on the handlebar 2 and operated by the rider's hand. The hydraulic circuit 12 is a flow circuit for brake fluid to generate braking force corresponding to the amount of operation of the brake lever 11 for the rotor 3a that rotates with the front wheel 3. In addition, a braking force corresponding to the amount of operation of the brake pedal 13 is generated for the rotor 4a that rotates with the rear wheel 4. The brake pedal 13 is mounted on the lower part of the main body 1 and operated by the rider's foot. The mechanism for generating braking force corresponding to the amount of operation of the brake pedal 13 can be a mechanism that generates braking force by increasing the pressure of the brake fluid, or a mechanism that generates braking force mechanically (e.g., a mechanism that generates braking force by tensioning a steel cable).

[0017] Here, the brake lever 11 and brake pedal 13 are examples of brake input parts. For example, as a brake input part replacing the brake lever 11, a brake pedal different from the brake pedal 13 provided on the main body 1 may also be used. As another example, as a brake input part replacing the brake pedal 13, a brake lever different from the brake lever 11 provided on the handle 2 may also be used.

[0018] The 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 with a brake pad (not shown), and a wheel cylinder 24 that actuates the brake pad (not shown) of the brake caliper 23.

[0019] An internal flow channel 40 is formed in the base 110 of the hydraulic control unit 100 to connect the wheel cylinder 24 and the master cylinder 21. Specifically, the internal flow channel 40 is connected to the master cylinder 21 via the hydraulic pipe 15 (described later) and to the wheel cylinder 24 via the hydraulic pipe 16 (described later). In this embodiment, a main flow channel 41 and a secondary flow channel 42 are formed in the base 110 to serve as the internal flow channel 40. In addition, the hydraulic control unit 100 includes a hydraulic adjustment valve 25 for opening and closing the internal flow channel 40. In this embodiment, the hydraulic control unit 100 includes an inlet valve 26 and a release valve 27 as the hydraulic adjustment valve 25.

[0020] Specifically, in the hydraulic circuit 12, the master cylinder 21 and the wheel cylinder 24 are connected via a hydraulic pipe 15 connecting the master cylinder 21 to the master cylinder port MP formed in the base 110, a main flow channel 41 formed in the base 110, and a hydraulic pipe 16 connecting the wheel cylinder 24 to the wheel cylinder port WP formed in the base 110. Furthermore, the brake fluid in the wheel cylinder 24 is introduced into the middle section 41a of the main flow channel 41 via the secondary flow channel 42.

[0021] An inlet valve 26 is provided in the main flow channel 41, closer to the wheel cylinder 24 than the middle section 41a of the main flow channel. By opening and closing the inlet valve 26, the flow passage portion of the inlet valve 26 in the main flow channel 41 is opened and closed to control the flow rate of brake fluid flowing through this area. In the secondary flow channel 42, a release valve 27, a brake fluid reservoir 28, and a pump 50 are sequentially provided from the upstream side. By opening and closing the release valve 27, the flow passage portion of the release valve 27 in the secondary flow channel 42 is opened and closed to control the flow rate of brake fluid flowing through this area. The pump 50 applies pressure to the brake fluid in the secondary flow channel 42 to move the brake fluid. That is, the pump 50 moves the brake fluid in the internal flow channel 40. Specifically, the pump 50 returns the brake fluid introduced from the wheel cylinder 24 into the internal flow channel 40 to the master cylinder 21.

[0022] Furthermore, in Figure 2, a master cylinder hydraulic pressure sensor 30 for detecting the hydraulic pressure of the brake fluid in the master cylinder 21 is provided in a region of the main flow channel 41 that is closer to the master cylinder 21 than the inlet valve 26. Additionally, a wheel cylinder hydraulic pressure sensor 31 for detecting the hydraulic pressure of the brake fluid in the wheel cylinder 24 is provided in a region of the main flow channel 41 that is closer to the wheel cylinder 24 than the inlet valve 26.

[0023] That is, the main flow channel 41 connects the master cylinder port MP and the wheel cylinder port WP via the inlet valve 26. Furthermore, the secondary flow channel 42 is defined as a flow channel that introduces brake fluid from the wheel cylinder 24 into the master cylinder 21 via the release valve 27, either partially or entirely. That is, the secondary flow channel 42 also connects the master cylinder port MP and the wheel cylinder port WP.

[0024] The inlet valve 26 is, for example, a solenoid valve that switches the flow of brake fluid from open to closed when it changes from a non-energized state to an energized state. The release valve 27 is, for example, a solenoid valve that switches the flow of brake fluid toward the reservoir 28 from closed to open when it changes from a non-energized state to an energized state.

[0025] The pump 50 of the hydraulic circuit 12 is driven by the motor 51. That is, the motor 51 is the driving source of the pump 50.

[0026] The hydraulic control unit 100 is constituted by the base 110, the various components installed on the base 110 (hydraulic adjustment valve 25, accumulator 28, master cylinder hydraulic sensor 30, wheel cylinder hydraulic sensor 31, pump 50, motor 51, etc.), and the control device (ECU) 60.

[0027] The control device 60 controls the hydraulic regulating valve 25 and the motor 51. The control device 60 can be a single unit or multiple units. The control device 60 can be mounted on the base 110 or on other components besides the base 110. A portion or all of the control device 60 can be constructed, for example, by a microcomputer, a microprocessor unit, or by something updatable, including firmware, or by a program module executed according to instructions from a CPU, etc. Furthermore, in this embodiment, as described later, at least the portion of the control device 60 that controls the operation of the hydraulic regulating valve 25 is constructed as a control board 61.

[0028] For example, under normal conditions, the hydraulic adjustment valve 25, namely the inlet valve 26 and the release valve 27, are controlled to be in a non-energized state by the control device 60. In this state, if the brake lever 11 is operated, the piston of the master cylinder 21 (not shown) is pressed in to increase the hydraulic pressure of the brake fluid in the wheel cylinder 24, and the brake pad of the brake caliper 23 (not shown) is pressed against the rotor 3a of the front wheel 3 to brake the front wheel 3.

[0029] The control device 60 receives the outputs of various sensors (master cylinder hydraulic sensor 30, wheel cylinder hydraulic sensor 31, wheel speed sensor, acceleration sensor, etc.). Based on its outputs, the control device 60 outputs commands to control the operation of the hydraulic regulating valve 25 and the motor 51, thereby performing pressure reduction control, etc.

[0030] For example, when there is excess hydraulic pressure in the brake fluid of the wheel cylinder 24, or when there is a possibility of excess hydraulic pressure, the control device 60 performs a pressure reduction control action to reduce the hydraulic pressure of the brake fluid in the wheel cylinder 24 of the hydraulic circuit 12. Also, for example, when the wheels of the motorcycle 200 lock up, or when there is a possibility of wheel lockup, the control device 60 performs a pressure reduction control action to reduce the hydraulic pressure of the brake fluid in the wheel cylinder 24 of the hydraulic circuit 12. In these situations, the control device 60 drives the motor 51 in the hydraulic circuit 12 while controlling the inlet valve 26 and the release valve 27 to be energized. This causes the brake fluid in the wheel cylinder 24 to flow into the secondary flow channel 42 through the main flow channel 41, thereby reducing the hydraulic pressure in the wheel cylinder 24. Then, the brake fluid flowing from the wheel cylinder 24 into the secondary flow channel 42 flows into the reservoir 28 through the release valve 27 and is stored in the reservoir 28. In addition, the brake fluid stored in the reservoir 28 is returned to the master cylinder 21 by the pump 50 driven by the motor 51.

[0031] That is, the hydraulic control unit 100 can control the hydraulic pressure of the brake fluid in the wheel cylinder 24 to perform pressure reduction control of the hydraulic circuit 12 (in other words, anti-lock brake control). Furthermore, conventional hydraulic control units may pump the brake fluid from the master cylinder to the wheel cylinders to perform automatic pressure boosting control. The hydraulic control unit 100 of this embodiment may also be configured to perform this type of automatic pressure boosting control.

[0032] <Composition of Hydraulic Control Unit> Figure 3 is a partial cross-sectional view of the hydraulic control unit of an embodiment of the present invention, viewed from the side. The base 110 is formed of a metal such as aluminum alloy, and is, for example, in a generally rectangular shape. Furthermore, each side of the base 110 may be flat, may include curved portions, or may include steps. A hydraulic regulating valve 25 and a motor 51 are erected on the side 110a of the base 110. Furthermore, the hydraulic regulating valve 25 and the motor 51 are covered by a housing 120.

[0033] The housing 120 is formed of resin and covers the hydraulic adjustment valve 25 and the motor 51. The housing 120 has, for example, a body portion 121 with a generally rectangular parallelepiped shape. Furthermore, the sides of the body portion 121 may be flat, may include curved portions, or may include steps. This body portion 121 houses the control board 61. As shown in FIG3, the body portion 121 may also have a first body portion 122 and a second body portion 124. The first body portion 122 has a generally box-shaped opening on the side of the base 110. The second body portion 124 covers the end of the first body portion 122 opposite to the base 110. The control board 61 is disposed within the space surrounded by the first body portion 122 and the second body portion 124.

[0034] As described above, the control board 61 controls the operation of the hydraulic regulating valve 25. Therefore, the control board 61 is electrically connected to the hydraulic regulating valve 25. In this embodiment, the control board 61 is electrically connected to the hydraulic regulating valve 25, for example, in the following manner. The hydraulic regulating valve 25 has a terminal 25a. This terminal 25a passes through a through hole 123a and is electrically connected to the control board 61, wherein the through hole 123a is formed in the wall portion 123 of the end portion of the first body portion 122 opposite to the base 110.

[0035] In addition, in this embodiment, the control board 61 can also control the motor 51. In this case, as shown in FIG3, the control board 61 is electrically connected to the motor 51. In this embodiment, the control board 61 is electrically connected to the motor 51 in the following manner. The motor 51 has a terminal 51a. This terminal 51a passes through a through hole 123b formed in the wall portion 123 of the first body portion 122 and is electrically connected to the control board 61.

[0036] In addition, in this embodiment, the first body portion 122 of the body portion 121 may also include a connector 125 electrically connected to the control board 61. The connector 125 is connected to signal lines and power supply lines, etc. In this embodiment, the control board 61 is electrically connected to the connector 125, for example, in the following manner: The connector 125 includes a pin 126. This pin 126 passes through a through hole 123c formed in the wall portion 123 of the first body portion 122 and is electrically connected to the control board 61.

[0037] Here, compared to vehicles such as four-wheeled vehicles, the freedom of component layout is relatively low for a type of vehicle called a motorcycle, and the freedom of mounting the hydraulic control unit is also low. Therefore, the demand for miniaturization of the hydraulic control unit mounted on a motorcycle is increasing. However, conventional hydraulic control units are fixed to the base and housing by screws located at the four corners. Therefore, conventional hydraulic control units are difficult to miniaturize because space must be ensured for the mounting screws at the four corners.

[0038] Therefore, in the hydraulic control unit 100 of this embodiment, the base 110 and the housing 120 are fixed in the following manner.

[0039] FIG4 is an exploded perspective view illustrating the connection configuration between the base and the first body portion of the housing in the hydraulic control unit according to an embodiment of the present invention. FIG5 is an assembled perspective view illustrating the connection configuration between the base and the first body portion of the housing in the hydraulic control unit according to an embodiment of the present invention. FIG6 is a side view showing the groove portion provided by the base of the hydraulic control unit according to an embodiment of the present invention. FIG7 is a side view showing the state in which the groove portion provided by the base of the hydraulic control unit according to an embodiment of the present invention is inserted into the wrist portion provided by the first body portion of the housing, and is a diagram showing the state before the wrist portion is subjected to heat riveting processing. In addition, FIG8 is a side view showing the state in which the groove portion provided by the base of the hydraulic control unit according to an embodiment of the present invention is inserted into the wrist portion provided by the first body portion of the housing, and is a diagram showing the state after the wrist portion is subjected to heat riveting processing.

[0040] The housing 120 of this embodiment has a plurality of wrists 130 extending from the first body portion 122 of the body portion 121 toward the base 110. Each of the wrists 130 faces a side of the base 110. Specifically, in this embodiment, the housing 120 has four wrists 130. Two of these wrists 130 face the side of the base 110 that is the left front side as shown in Figures 4 and 5. This side will sometimes be referred to as the opposing side 110b. The remaining two of these wrists 130 face the side of the base 110 that is opposite the opposing side 110b. That is, the remaining two of these wrists 130 face the side of the base 110 that is the right rear side as shown in Figures 4 and 5. This side will sometimes be referred to as the opposing side 110c.

[0041] Next, each of the wrist portions 130 has a heat-riveting portion 131 that connects to the base 110. This heat-riveting portion 131 is formed at a location on the wrist portion 130 when the wrist portion 130 has undergone heat-riveting processing. Specifically, it is a location formed in the following manner. As shown in FIG5, the base 110 and the first body portion 122 of the body portion 121 are positioned. Next, the wrist portion 130 is pressed against the side of the base 110 using a tool 300. Then, by heating the wrist portion 130 with the tool 300, or by ultrasonically vibrating the tool 300 to generate frictional heat in the wrist portion 130, the wrist portion 130 is thermally deformed, and the thermally deformed portion of the wrist portion 130 is pressed against the side of the base 110. In this way, the portion of the wrist portion 130 pressed against the side of the base 110 becomes the heat-riveting portion 131.

[0042] Thus, the hydraulic control unit 100 of this embodiment can fix the base 110 and the housing 120 (more specifically, the first body portion 122 of the body portion 121) by connecting the wrist portion 130 provided on the housing 120 to the base 110. Therefore, the hydraulic control unit 100 of this embodiment can eliminate at least one fixing screw provided at the four corners of a conventional hydraulic control unit, and can be more miniaturized than a conventional hydraulic control unit.

[0043] <Manufacturing Method of Hydraulic Control Unit> FIG9 is a flowchart illustrating the manufacturing method of the hydraulic control unit according to an embodiment of the present invention. In addition, FIG9 shows the manufacturing steps when the first body portion 122 of the housing 120 and the base 110 are fixed after the necessary parts are installed on the first body portion 122 of the housing 120 and the base 110 respectively.

[0044] After the necessary parts are installed on the first body portion 122 and the base 110 of the housing 120, the positioning step S1 is performed. In the positioning step S1, the first body portion 122 and the base 110 of the housing 120 are positioned.

[0045] Step S2 following step S1 is a thermal riveting step. In the thermal riveting step, thermal riveting is performed on each of the wrist parts 130 to fix the first body part 122 of the housing 120 to the base 110. Specifically, by performing thermal riveting on each of the wrist parts 130, the thermal riveting part 131 of the wrist part 130 is connected to the side of the base 110, thereby fixing the first body part 122 of the housing 120 to the base 110. The method of applying heat energy in the thermal riveting process is not particularly limited, and includes, for example: applying Joule heating to the wrist part 130 using resistance, applying frictional heat to the wrist part 130 using ultrasonic vibration, and applying infrared heat to the wrist part 130, etc.

[0046] Here, the hydraulic control unit 100 of this embodiment preferably has the following configuration.

[0047] Preferably, the base 110 has grooves 111 on the opposing side surfaces 110b and 110c for receiving the wrist portion 130. In this case, if the orientation of the body portion 121 of the housing 120 and the base 110 is set as orientation direction A, a notch is cut at the end 112 of the groove portion 111 on the side of the body portion 121 in orientation direction A, and a heat-fitting portion 131 is provided in the groove portion 111. When the opposing side surfaces 110b and 110c do not have grooves 111, the heat-fitting portion 131 is pressed against a surface. On the other hand, when the heat-fitting portion 131 is provided in the groove portion 111, the heat-fitting portion 131 can be pressed against the wall surface 115 of the groove portion 111. The wall surface 115 of the groove portion 111 includes a bottom wall surface 115a and a side wall surface 115b. Therefore, when the thermal riveting portion 131 is provided in the groove portion 111, the number of surfaces pressed by the thermal riveting portion 131 can be increased, improving the fixing stability between the first body portion 122 of the housing 120 and the base 110. As a result, more fixing screws provided at the four corners of conventional hydraulic control units can be eliminated, allowing the hydraulic control unit to be further miniaturized.

[0048] As shown by the two-point chain in FIG6, the area of ​​the groove portion 111 cut by a plane perpendicular to the arrangement direction A is defined as the groove portion cross-sectional area. When defining the groove portion cross-sectional area in this way, it is preferable that the groove portion 111 has an enlarged portion 114 in the region where it is separated from the body portion 121 of the housing 120 with reference to the end portion 112, the groove portion cross-sectional area being larger than that of the end portion 112. In other words, the groove portion cross-sectional area 113b of the enlarged portion 114 is larger than that of the end portion 112. At this time, the thermal riveting portion 131 is provided in the enlarged portion 114.

[0049] In the hydraulic control unit 100 configured as described above, the thermally riveted portion 131 hooks onto the corner portion 114a on the side of the main body portion 121 of the enlarged portion 114. Therefore, the hydraulic control unit 100 configured as described above can further improve the fixing stability between the first main body portion 122 of the housing 120 and the base 110. As a result, more fixing screws provided at the four corners of conventional hydraulic control units can be eliminated, and the hydraulic control unit can be further miniaturized. From the same point of view, it is even more preferable that, in the groove portion 111 provided on the opposite side 110b, the length of the enlarged portion 114 in the direction perpendicular to the arrangement direction A and parallel to the opposite side 110b is longer than that of the end portion 112. In addition, in the groove portion 111 provided on the opposite side 110c, the length of the enlarged portion 114 in the direction perpendicular to the arrangement direction A and parallel to the opposite side 110c is longer than that of the end portion 112. Furthermore, in this embodiment, the length of the enlarged portion 114 in the direction perpendicular to the arrangement direction A and parallel to the opposite side is the same in all ranges. However, it is not limited to this; the enlarged portion 114 may have a region in which the length in the direction perpendicular to the arrangement direction A and parallel to the opposite side increases as it moves further away from the end 112.

[0050] Preferably, there are at least four wrist portions 130. Furthermore, at least a portion of each wrist portion 130 that is not a thermally riveted portion 131 (i.e., at least a portion of the non-thermally riveted portion 132) is inserted into the groove portion 111 and contacts the wall surface 115 of the groove portion 111. In other words, at least a portion of the non-thermally riveted portion 132 of each wrist portion 130 is inserted into the groove portion 111 and contacts the bottom wall surface 115a or side wall surface 115b of the groove portion 111. In the hydraulic control unit 100 configured as described above, during the positioning step, the first body portion 122 of the body portion 121 of the housing 120 and the base 110 can be positioned by inserting the groove portion 111 into the wrist portion 130. Therefore, in the hydraulic control unit 100 configured as described above, since positioning pins or the like are not required for positioning the first body portion 122 and the base 110, the hydraulic control unit 100 can be further miniaturized.

[0051] Preferably, the first body portion 122 of the body portion 121 is bonded to the substrate 110 using an adhesive 71 such as a silicone adhesive, thereby sealing the space between the first body portion 122 of the body portion 121 and the substrate 110. That is, preferably, the housing 120 and the substrate 110 are bonded together using an adhesive 71, thereby sealing the space between the housing 120 and the substrate 110. In this embodiment, the end portion 122a of the first body portion 122 on the substrate 110 side is bonded to the side surface 110a of the substrate 110 using an adhesive 71. Conventionally, hydraulic control units seal the space between the housing and the substrate to prevent water and dust from entering the hydraulic control unit. By sealing the first body portion 122 of the body portion 121 with the substrate 110 using adhesive 71, the hydraulic control unit 100 can be miniaturized compared to sealing the first body portion 122 of the body portion 121 with the substrate 110 using an O-ring or similar material. Furthermore, by sealing the first body portion 122 of the body portion 121 with the substrate 110 using adhesive 71, the adhesion force of the adhesive 71 can be utilized to improve the stability of the fixation between the first body portion 122 and the substrate 110.

[0052] The direction parallel to the arrangement direction A, and in which the main body portions 121 of the base 110 and housing 120 are arranged in sequence, is set as the viewing direction B. Preferably, when the hydraulic control unit 100 is viewed from the viewing direction B, the connector 125 is located outside the base 110. Furthermore, the connector 125 faces a side 110d that is different from the opposing side 110b and opposing side 110c of the base 110 that face the wrist portion 130. In the hydraulic control unit 100 configured as described above, the connector 125 can face the side of the base 110 that is connected to the side 110a of the main body portion 121 of the housing 120. In addition, by making the side 110d, which is different from the opposing side 110b and opposing side 110c, face the connector 125, the placement position of the connector 125 can be determined without considering whether the tool 300 used for hot riveting the wrist portion 130 interferes with the connector 125.

[0053] The hydraulic control unit 100 may also include screws 75 for fixing the body portion 121 of the housing 120 to the base 110. In this embodiment, a female screw portion 117 is formed in the side 110a of the base 110, in the area between the motor 51 and the hydraulic adjustment valve 25. In addition, a through hole 123d is formed in the wall portion 123 of the first body portion 122. Then, the male screw portion of the screw 75 passing through the through hole 123d is screwed into the female screw portion 117, and the first body portion 122 of the body portion 121 and the base 110 are fixed by screws 75. For example, between the motor 51 and the hydraulic adjustment valve 25, there are areas in the hydraulic control unit 100 where screws 75 can be arranged while suppressing the enlargement of the hydraulic control unit 100. In this case, screws 75 for fixing the body portion 121 of the housing 120 to the base 110 may also be included.

[0054] <Modification> FIG10 is a diagram illustrating a modified example of the hydraulic control unit according to an embodiment of the present invention, and is a cross-sectional view showing the area near the wrist. The groove portion 111 of the hydraulic control unit 100 shown in FIG10, similar to the groove portion 111 of the hydraulic control unit 100 described above, has an enlarged portion 114 in the region separated from the body portion 121 of the housing 120 with reference to the end portion 112. Here, in the hydraulic control unit 100 described above, the enlarged portion 114 of the groove portion 111 provided on the opposing side 110b is longer in the direction perpendicular to the arrangement direction A and parallel to the opposing side 110b than the end portion 112. Furthermore, the enlarged portion 114 of the groove portion 111 provided on the opposing side 110c is longer in the direction perpendicular to the arrangement direction A and parallel to the opposing side 110c than the end portion 112. On the other hand, in the hydraulic control unit 100 shown in FIG10, the enlarged portion 114 of the groove portion 111 provided on the opposite side 110b is longer in the direction perpendicular to the arrangement direction A and perpendicular to the opposite side 110b compared to the end portion 112. Furthermore, the enlarged portion 114 of the groove portion 111 provided on the opposite side 110c is also longer in the direction perpendicular to the arrangement direction A and perpendicular to the opposite side 110c compared to the end portion 112.

[0055] In the hydraulic control unit 100 shown in FIG10, similarly to the hydraulic control unit 100 described above, the thermally riveted portion 131 is hooked onto the corner portion 114a on the side of the body portion 121 of the enlarged portion 114. Therefore, in the hydraulic control unit 100 shown in FIG10, similarly to the hydraulic control unit 100 described above, the fixing stability of the first body portion 122 of the housing 120 and the base 110 can be further improved. As a result, more fixing screws provided at the four corners of conventional hydraulic control units can be eliminated, and the hydraulic control unit can be further miniaturized. In addition, in FIG10, the length of the enlarged portion 114 in the direction perpendicular to the arrangement direction A and perpendicular to the opposite side is the same in all ranges. It is not limited to this, the enlarged portion 114 may have a region in which the length in the direction perpendicular to the arrangement direction A and perpendicular to the opposite side increases as it moves further away from the end 112.

[0056] FIG11 is a diagram illustrating a modified example of the hydraulic control unit according to an embodiment of the present invention, and is a side view showing the area near the wrist. The groove portion 111 of the base 110 is not an essential configuration for the hydraulic control unit 100. As shown in FIG11, the hydraulic control unit 100 may also be configured without the groove portion 111. The hydraulic control unit 100 shown in FIG11 can also fix the base 110 and the housing 120 (more specifically, the first body portion 122 of the body portion 121) by connecting the wrist portion 130 provided on the housing 120 to the base 110. Therefore, the hydraulic control unit 100 shown in FIG11 can also eliminate at least one of the fixing screws provided at the four corners of a conventional hydraulic control unit, and can be further miniaturized than a conventional hydraulic control unit.

[0057] FIG12 is a diagram illustrating a modified example of the hydraulic control unit according to an embodiment of the present invention, and is a side view showing the area near the wrist. The hydraulic control unit 100 described above has a groove portion 111, and an enlarged portion 114 is provided in the groove portion 111. However, the enlarged portion 114 is not an essential configuration for the hydraulic control unit 100. As shown in FIG12, the hydraulic control unit 100 may also be configured to have a groove portion 111 without the enlarged portion 114. Compared with the hydraulic control unit 100 without the groove portion 111, the hydraulic control unit 100 shown in FIG12 can increase the number of surfaces pressed by the thermal riveting portion 131, thereby improving the fixing stability of the first body portion 122 of the housing 120 and the base 110.

[0058] FIG13 is a partial cross-sectional view showing a modified example of the hydraulic control unit of the present invention viewed from the side. The hydraulic control unit 100 described above seals the body portion 121 and the base 110 with an adhesive 71. However, it is not limited to this; as shown in FIG13, the hydraulic control unit 100 can also seal the body portion 121 and the base 110 with an O-ring 72. In other words, as shown in FIG13, the hydraulic control unit 100 can also include an O-ring 72, held between the body portion 121 and the base 110, to seal the body portion 121 and the base 110. The hydraulic control unit 100 configured in this way can eliminate the fixing screws provided at the four corners of conventional hydraulic control units, and can be further miniaturized compared to conventional hydraulic control units.

[0059] FIG14 is a diagram showing the configuration of a brake system according to a modified example of the hydraulic control unit of the present invention. Conventional hydraulic control units have a configuration that returns brake fluid introduced into the internal flow channel to the master cylinder without a pump. As shown in FIG14, the hydraulic control unit 100 may also be configured to return brake fluid introduced into the internal flow channel 40 to the master cylinder 21 without a pump. Such a hydraulic control unit 100 is configured, for example, as shown in FIG14. Specifically, the hydraulic control unit 100 is configured without a pump 50 and a motor 51 that drives the pump 50. In this configuration, when the hydraulic pressure of the brake fluid in the reservoir 28 is higher than the hydraulic pressure of the brake fluid in the master cylinder 21, the brake fluid in the reservoir 28 is returned to the master cylinder 21 by means of this pressure difference.

[0060] 〈Effects of the Hydraulic Control Unit〉 The effects of the hydraulic control unit 100 in this embodiment will be explained below.

[0061] The hydraulic control unit 100 of this embodiment is mounted on a motorcycle 200 and is a hydraulic control unit for a braking system 10 capable of performing anti-lock braking control. The hydraulic control unit 100 includes: a base 110 having an internal flow channel 40 that connects the wheel cylinder 24 to the master cylinder 21; and a resin housing 120 housing a control board 61 that controls the operation of a hydraulic adjustment valve 25 for opening and closing the internal flow channel 40. The housing 120 includes: a body portion 121 housing the control board 61; and a plurality of wrist portions 130 extending from the body portion 121 toward the base 110 and facing the side of the base 110 respectively. Furthermore, each of the wrist portions 130 has a heat-riveting portion 131 connected to the base 110.

[0062] The hydraulic control unit 100 configured in this way can fix the base 110 to the housing 120 by connecting the wrist portion 130 provided on the housing 120 to the base 110. Therefore, the hydraulic control unit 100 configured in this way can eliminate at least one of the fixing screws provided at the four corners of the conventional hydraulic control unit, and can be more miniaturized than the conventional hydraulic control unit.

[0063] The hydraulic control unit 100 of this embodiment has been described above, but the hydraulic control unit of the present invention is not limited to the description of this embodiment. The hydraulic control unit of the present invention may also be implemented only in part of this embodiment. [Simplified Explanation of the Diagram]

[0010] [Fig. 1] is a diagram showing the configuration of a motorcycle equipped with a braking system having a hydraulic control unit according to an embodiment of the present invention. [Fig. 2] is a diagram showing the configuration of a braking system having a hydraulic control unit according to an embodiment of the present invention. [Fig. 3] is a partial cross-sectional view of the hydraulic control unit according to an embodiment of the present invention viewed from the side. [Fig. 4] is an exploded perspective view illustrating the connection configuration between the base and the first body portion of the housing in the hydraulic control unit according to an embodiment of the present invention. [Fig. 5] is an assembled perspective view illustrating the connection configuration between the base and the first body portion of the housing in the hydraulic control unit according to an embodiment of the present invention. [Fig. 6] is a side view showing the groove portion of the base of the hydraulic control unit according to an embodiment of the present invention. [Fig. 7] is a side view showing the state in which the wrist portion of the first body portion of the housing is inserted into the groove portion of the base of the hydraulic control unit according to an embodiment of the present invention, and is a diagram showing the state before the wrist portion is subjected to heat riveting processing. [Figure 8] is a side view showing the state in which the groove portion of the base of the hydraulic control unit according to an embodiment of the present invention is inserted into the wrist portion of the first body portion of the housing, and also a diagram showing the state after the wrist portion has undergone hot riveting processing. [Figure 9] is a flowchart for explaining the manufacturing method of the hydraulic control unit according to an embodiment of the present invention. [Figure 10] is a diagram for explaining a modified example of the hydraulic control unit according to an embodiment of the present invention, and also a cross-sectional view showing the area near the wrist portion. [Figure 11] is a diagram for explaining a modified example of the hydraulic control unit according to an embodiment of the present invention, and also a side view showing the area near the wrist portion. [Figure 12] is a diagram for explaining a modified example of the hydraulic control unit according to an embodiment of the present invention, and also a side view showing the area near the wrist portion. [Figure 13] is a partial cross-sectional view showing a modified example of the hydraulic control unit according to an embodiment of the present invention viewed from the side. [Figure 14] is a diagram showing the configuration of a brake system having a modified example of the hydraulic control unit according to an embodiment of the present invention.

Claims

1. A hydraulic control unit (100) mounted on a motorcycle (200) and serving as a hydraulic control unit (10) for a braking system (10) capable of performing anti-lock braking control, comprising: a base (110) having an internal flow channel (40) communicating between a wheel cylinder (24) and a master cylinder (21); and a resin housing (120) housing a control board (61) which controls the operation of a hydraulic adjustment valve (25) for opening and closing the aforementioned internal flow channel (40); the aforementioned housing (120) comprising: a body portion (121) housing the aforementioned control board (61); and a plurality of wrist portions (130) extending from the aforementioned body portion (121) toward the aforementioned base portion (110) and facing the side of the aforementioned base portion (110); Each of the aforementioned wrist portions (130) has a heat-riveting portion (131) that is connected to the aforementioned base (110).

2. The hydraulic control unit (100) as requested in item 1, wherein, When the side of the aforementioned base (110) facing the aforementioned wrist (130) is designated as the opposing side (110b, 110c), the aforementioned base (110) has a groove (111) on the aforementioned opposing side (110b, 110c) for receiving the aforementioned wrist (130); when the direction in which the aforementioned body part (121) and the aforementioned base (110) are arranged is designated as the arrangement direction (A), the end (112) of the aforementioned groove (111) near the aforementioned body part (121) in the aforementioned arrangement direction (A) is cut with a notch; the aforementioned hot riveting part (131) is provided on the aforementioned groove (111).

3. The hydraulic control unit (100) as requested in item 2, wherein, When the area of ​​the groove portion (111) cut with a plane perpendicular to the aforementioned arrangement direction (A) is taken as the groove portion cross-sectional area, the groove portion (111) has an enlarged portion (114) in the region separated from the aforementioned body portion (121) with the aforementioned end portion (112) as a reference, where the groove portion cross-sectional area (113b) is larger than the groove portion cross-sectional area (113a) of the aforementioned end portion (112); the aforementioned hot riveting portion (131) is provided in the aforementioned enlarged portion (114).

4. The hydraulic control unit (100) as requested in item 3, wherein, Compared to the aforementioned end portion (112), the aforementioned enlarged portion (114) is longer in the direction perpendicular to the aforementioned arrangement direction (A) and parallel to the aforementioned opposing side surfaces (110b, 110c).

5. The hydraulic control unit (100) as requested in item 3, wherein, Compared to the aforementioned end portion (112), the aforementioned enlarged portion (114) is longer in the direction perpendicular to the aforementioned arrangement direction (A) and perpendicular to the aforementioned opposing side surfaces (110b, 110c).

6. The hydraulic control unit (100) of any one of requests 2 to 5, wherein, There are at least four wrist portions (130); at least a portion of each of the aforementioned wrist portions (130) that is not part of the aforementioned hot riveting portion (131) is inserted into the aforementioned groove portion (111) and contacts the wall surface (115) of the aforementioned groove portion (111).

7. The hydraulic control unit (100) of any one of requests 1 to 5, wherein, The aforementioned body part (121) and the aforementioned substrate (110) are bonded together by an adhesive (71) to seal the space between the aforementioned body part (121) and the aforementioned substrate (110).

8. The hydraulic control unit (100) of any one of claims 1 to 5, comprising: an O-ring (72) held between the aforementioned body portion (121) and the aforementioned base (110) for sealing the aforementioned body portion (121) and the aforementioned base (110).

9. The hydraulic control unit (100) of any one of requests 1 to 5, wherein, The aforementioned body part (121) is equipped with a connector (125) electrically connected to the aforementioned control board (61); when the direction in which the aforementioned body part (121) and the aforementioned base (110) are arranged is set as the arrangement direction (A), and the direction in which the aforementioned base (110) and the aforementioned body part (121) are arranged in sequence, which is parallel to the aforementioned arrangement direction (A), is set as the viewing direction (B), when viewed from the aforementioned viewing direction (B), the aforementioned connector (125) is located outside the aforementioned base (110); the aforementioned connector (125) faces a side (110d) that is different from the aforementioned side (110b, 110c) of the aforementioned base (110) that faces the aforementioned wrist part (130).

10. The hydraulic control unit (100) of any one of claims 1 to 5, comprising: screws (75) for fixing the aforementioned body part (121) and the aforementioned base (110).

11. The hydraulic control unit (100) of any one of claims 1 to 5, comprising: a pump (50) that returns brake fluid introduced from the aforementioned wheel cylinder (24) into the aforementioned internal flow channel (40) to the aforementioned master cylinder (21); and a motor (51) that drives the aforementioned pump (50).

12. The hydraulic control unit (100) of any one of requests 1 to 5, wherein, It is configured to return brake fluid introduced from the aforementioned wheel cylinder (24) to the aforementioned internal flow channel (40) to the aforementioned master cylinder (21) in a pumpless manner.

13. A straddle-type vehicle (200) comprising: a hydraulic control unit (100) as claimed in any one of claims 1 to 5.

14. A method for manufacturing a hydraulic control unit (100), which is a method for manufacturing a hydraulic control unit (100) mounted on a motorcycle (200) and capable of performing anti-lock braking control, wherein, The aforementioned hydraulic control unit (100) comprises: a base (110) having an internal flow channel (40) that connects the wheel cylinder (24) and the master cylinder (21); and a resin housing (120) that houses a control board (61) which controls the operation of a hydraulic adjustment valve (25) for opening and closing the aforementioned internal flow channel (40); the aforementioned housing (120) comprises: a body portion (121) that houses the aforementioned control board (61); and a plurality of wrist portions (130) that extend from the aforementioned body portion (121) toward the aforementioned base (110) and face the side of the aforementioned base (110) respectively; the manufacturing method of the aforementioned hydraulic control unit (100) comprises: a hot riveting step (S2) of performing a hot riveting process on each of the aforementioned wrist portions (130) to fix the aforementioned base (110) and the aforementioned housing (120).

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