Hydraulic control unit, and method for manufacturing a hydraulic control unit

Abstract

Provided are: a hydraulic control unit that can meet a need for miniaturization and a method for manufacturing such a hydraulic control unit. This hydraulic control unit is for a brake system mounted on a straddle-riding type vehicle, the hydraulic control unit comprising a base in which a brake fluid flow path is formed, a circuit board that controls the driving of a hydraulic regulating valve that opens and closes the flow path, a housing that accommodates the circuit board, and a connecting unit that connects the base and the housing, wherein: the connecting unit comprises a recessed section formed in the base, and a pin held by the housing and having an end press-fitted to the recessed section; a through-hole is formed in the end press-fitted to the recessed part; the outer edge of the through-hole is defined by a first branch section and a second branch section, both ends of which are connected to each other, in the end press-fitted into the recessed section; and a reinforcing member different from the base and the pin abuts and presses at least one among the first branch section and the second branch section.

Description

Technical Field

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[0001] The present invention relates to a hydraulic control unit of a brake system mounted on a saddle-type vehicle and a method for manufacturing the hydraulic control unit of the brake system mounted on the saddle-type vehicle.

Background Art

[0002] As a conventional vehicle, there is one provided with a brake system that controls the braking force of wheels by controlling the pressure of brake fluid. The brake system includes a hydraulic control unit. The hydraulic control unit includes a base body in which a flow path of brake fluid is formed, a circuit board that controls the drive of a hydraulic adjustment valve that opens and closes the flow path of brake fluid, and a housing that houses the circuit board. The housing is connected to the base body by bolts (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

[0006] The hydraulic control unit according to the present invention is a hydraulic control unit for a brake system mounted on a saddle-type vehicle, comprising: a base body in which a flow path for brake fluid is formed; a circuit board for controlling the drive of a hydraulic adjustment valve that opens and closes the flow path; a housing in which the circuit board is housed; and a connecting portion connecting the base body and the housing, wherein the connecting portion comprises: a recess formed in the base body; and a pin held in the housing, with its end press-fitted into the recess, wherein a through hole is formed in the end press-fitted into the recess, and the outer edge of the through hole is defined by a first branch portion and a second branch portion of the end press-fitted into the recess, the ends of which are connected to each other, and a reinforcing member separate from the base body and the pin abuts against and presses against at least one of the first branch portion and the second branch portion.

[0007] The present invention relates to a method for manufacturing a hydraulic control unit for a brake system mounted on a saddle-type vehicle, wherein the hydraulic control unit comprises a base body having a flow path for brake fluid, a circuit board for controlling the drive of a hydraulic adjustment valve that opens and closes the flow path, and a housing in which the circuit board is housed, wherein the end of a pin held in the housing is press-fitted into a recess formed in the base body, thereby connecting the base body and the housing, a through hole is formed in the end that is press-fitted into the recess, the outer edge of the through hole is defined by a first branch and a second branch of the end that is press-fitted into the recess, the ends of which are connected to each other, and a reinforcing member separate from the base body and the pin is press-fitted into a lateral hole extending from the outer surface of the base body into the recess in which the end is press-fitted, so that the reinforcing member abuts against and presses against at least one of the first branch and the second branch. [Effects of the Invention]

[0008] In the hydraulic control unit according to the present invention, the base and housing are connected by press-fitting the end of a pin held in the housing into a recess formed in the base. In other words, the connection part between the base and housing can be realized with a compact structure, improving the possibility of miniaturization. Furthermore, a reinforcing member separate from the base and pin abuts and presses against at least one of the first branch portion and the second branch portion that define the outer edge of the through hole formed in the end of the pin. As a result, the possibility of miniaturization is improved and the durability of the connection is enhanced. [Brief explanation of the drawing]

[0009] [Figure 1] This figure shows a schematic configuration of a bicycle equipped with a brake system according to an embodiment of the present invention. [Figure 2] This figure shows a schematic configuration of a brake system according to an embodiment of the present invention. [Figure 3] This is a side view of the inside of a hydraulic control unit according to an embodiment of the present invention. [Figure 4] This is a view from above of the inside of a hydraulic control unit according to an embodiment of the present invention. [Figure 5] This is a side view of the inside of a hydraulic control unit according to an embodiment of the present invention. [Figure 6] This is a side view of the inside of a hydraulic control unit according to an embodiment of the present invention. [Figure 7] This is a side view of the inside of a hydraulic control unit according to an embodiment of the present invention. [Figure 8] This is a side view of the inside of a hydraulic control unit according to an embodiment of the present invention. [Figure 9] This is a side view of the inside of a hydraulic control unit according to an embodiment of the present invention. [Modes for carrying out the invention]

[0010] The hydraulic control unit according to the present invention will be described below with reference to the drawings.

[0011] In the following description, the present invention will be applied to bicycles (e.g., two-wheeled vehicles, three-wheeled vehicles, etc.), but the present invention may also be applied to other saddle-type vehicles other than bicycles. Other saddle-type vehicles other than bicycles include, for example, motorcycles, three-wheeled vehicles, buggies, etc., that use at least one of an engine and an electric motor as a power source. A bicycle refers to any vehicle that can be propelled on the road by the force applied to the pedals. Bicycles include, for example, regular bicycles, electric assist bicycles, electric bicycles, etc. Motorcycles and three-wheeled vehicles refer to so-called motorcycles, and motorcycles include, for example, motorcycles, scooters, electric scooters, etc.

[0012] Furthermore, the configurations and operations described below are merely examples, and the hydraulic control unit according to the present invention is not limited to such configurations and operations. For example, although the following description describes a case where the hydraulic control unit according to the present invention is pumpless, the hydraulic control unit according to the present invention may also be equipped with a pump to assist in the flow of brake fluid. Also, although the following description describes a case where the brake system according to the present invention performs anti-lock brake control only on the braking force generated on the front wheels, the brake system according to the present invention may also perform anti-lock brake control only on the braking force generated on the rear wheels, or it may perform anti-lock brake control on both the braking force generated on the front wheels and the braking force generated on the rear wheels.

[0013] Furthermore, in each figure, identical or similar components or parts are given the same reference numeral, or the reference numeral is omitted. In addition, detailed structural elements are simplified or omitted as appropriate. Also, redundant explanations are simplified or omitted as appropriate.

[0014] <Installation of braking systems on bicycles> The mounting of the braking system according to the embodiment on a bicycle will be described. FIG. 1 is a diagram showing a schematic configuration of a bicycle on which a braking system according to an embodiment of the present invention is mounted. In FIG. 1, a case where the bicycle 200 is a two-wheeled vehicle is shown, but the bicycle 200 may be another bicycle such as a tricycle.

[0015] A bicycle 200, which is an example of a saddle-riding type vehicle, includes a frame 210, a turning part 230, a saddle 218, pedals 219, a rear wheel 220, and a rear-wheel braking part 260.

[0016] The frame 210 includes, for example, a head tube 211 that pivotally supports a steering column 231 of the turning part 230, a top tube 212 and a down tube 213 connected to the head tube 211, a seat tube 214 connected to the top tube 212 and the down tube 213 and holding the saddle 218, and stays 215 connected to the upper and lower ends of the seat tube 214 and holding the rear wheel 220 and the rear-wheel braking part 260.

[0017] The turning part 230 includes a steering column 231, a handle stem 232 held by the steering column 231, a handlebar 233 held by the handle stem 232, a braking operation part 240 attached to the handlebar 233, a front fork 216 connected to the steering column 231, a front wheel 217 rotatably held by the front fork 216, and a front-wheel braking part 250. The front fork 216 is provided on both sides of the front wheel 217. One end of the front fork 216 is connected to the steering column 231, and the other end is connected to the rotation center of the front wheel 217.

[0018] The braking operation unit 240 includes a mechanism used as an operation unit for the front-wheel braking unit 250 and a mechanism used as an operation unit for the rear-wheel braking unit 260. For example, the mechanism used as an operation unit for the front-wheel braking unit 250 is disposed on the right end side of the handlebar 233, and the mechanism used as an operation unit for the rear-wheel braking unit 260 is disposed on the left end side of the handlebar 233.

[0019] The hydraulic control unit 1 is connected to the front fork 216 of the turning unit 230. The hydraulic control unit 1 is a unit responsible for controlling the pressure of the brake fluid of the front-wheel braking unit 250. The rear-wheel braking unit 260 may be a type of braking unit that generates braking force by increasing the pressure of the brake fluid, or may be a type of braking unit that generates braking force mechanically (for example, a type of braking unit that generates braking force by generating tension in a wire, etc.).

[0020] For example, a power supply unit 270 that serves as the power source of the hydraulic control unit 1 is attached to the down tube 213 of the frame 210. The power supply unit 270 may be a battery or a generator. The generator includes, for example, those that generate electricity by the running of the bicycle 200 (for example, a hub dynamo that generates electricity by the rotation of the front wheel 217 or the rear wheel 220, a motor that is a drive source of the front wheel 217 or the rear wheel 220 and generates regenerative power, etc.), those that generate electricity by sunlight, etc.

[0021] That is, the bicycle 200 is equipped with a brake system 100 that includes at least a braking operation unit 240, a front-wheel braking unit 250, a hydraulic control unit 1, and a power supply unit 270. The brake system 100 can perform anti-lock brake control by controlling the pressure of the brake fluid of the front-wheel braking unit 250 by the hydraulic control unit 1.

[0022] <Configuration of Brake System>

[0023] <0000I10>The configuration of the brake system according to the embodiment will be described. Figure 2 is a diagram showing the schematic configuration of a brake system according to an embodiment of the present invention. The hydraulic control unit 1 includes a base body 10. The base body 10 has a master cylinder port 11, a wheel cylinder port 12, and a flow path 13 that connects the master cylinder port 11 and the wheel cylinder port 12.

[0024] Flow path 13 is a brake fluid flow path. Flow path 13 includes a first flow path 14, a second flow path 15, a third flow path 16, and a fourth flow path 17. The master cylinder port 11 and the wheel cylinder port 12 are in communication via the first flow path 14 and the second flow path 15. In addition, the inlet end of the third flow path 16 is connected to a portion of the second flow path 15.

[0025] A braking operation unit 240 is connected to the master cylinder port 11 via a fluid pipe 101. The braking operation unit 240 includes a brake lever 241, a master cylinder 242, and a reservoir 243. The master cylinder 242 has a piston (not shown) that moves in conjunction with the user's operation of the brake lever 241, and is connected to the inlet side of the first passage 14 via the fluid pipe 101 and the master cylinder port 11. The movement of the piston increases or decreases the pressure of the brake fluid in the first passage 14. The brake fluid from the master cylinder 242 is stored in the reservoir 243.

[0026] The front wheel braking unit 250 is connected to the wheel cylinder port 12 via a fluid pipe 102. The front wheel braking unit 250 includes a wheel cylinder 251 and a rotor 252. The wheel cylinder 251 is attached to the lower end of the front fork 216. The wheel cylinder 251 has a piston (not shown) that moves in conjunction with the pressure of the brake fluid in the fluid pipe 102, and is connected to the outlet side of the second passage 15 via the fluid pipe 102 and the wheel cylinder port 12. The rotor 252 is held by the front wheel 217 and rotates with the front wheel 217. The movement of the piston presses a brake pad (not shown) against the rotor 252, thereby braking the front wheel 217.

[0027] Furthermore, the hydraulic control unit 1 is equipped with a hydraulic pressure adjustment valve 20 that opens and closes the flow path 13. In this embodiment, the hydraulic control unit 1 is equipped with an inlet valve 21 and an outlet valve 22 as the hydraulic pressure adjustment valve 20. The inlet valve 21 is provided between the outlet side of the first flow path 14 and the inlet side of the second flow path 15, and opens and closes the flow of brake fluid between the first flow path 14 and the second flow path 15. The outlet valve 22 is provided between the outlet side of the third flow path 16 and the inlet side of the fourth flow path 17, and opens and closes the flow of brake fluid between the third flow path 16 and the fourth flow path 17. The pressure of the brake fluid is controlled by the opening and closing operation of the inlet valve 21 and the outlet valve 22.

[0028] Furthermore, the hydraulic control unit 1 includes a coil 61 that drives the inlet valve 21 and a coil 63 that drives the outlet valve 22. For example, when coil 61 is de-energized, the inlet valve 21 opens the flow of brake fluid in both directions. When coil 61 is energized, the inlet valve 21 closes, blocking the flow of brake fluid. In other words, in this embodiment, the inlet valve 21 is a solenoid valve that is open when de-energized. Also, for example, when coil 63 is de-energized, the outlet valve 22 blocks the flow of brake fluid. When coil 63 is energized, the outlet valve 22 opens, opening the flow of brake fluid in both directions. In other words, in this embodiment, the outlet valve 22 is a solenoid valve that is closed when de-energized.

[0029] Furthermore, the hydraulic control unit 1 is equipped with an accumulator 23. The accumulator 23 is connected to the outlet side of the fourth passage 17 and stores the brake fluid that has passed through the outlet valve 22.

[0030] Furthermore, the hydraulic control unit 1 is equipped with a hydraulic pressure sensor 103 for detecting the pressure of the brake fluid in the wheel cylinder 251. The hydraulic pressure sensor 103 is provided in the second passage 15 or the third passage 16.

[0031] Furthermore, the hydraulic control unit 1 includes a control unit 30. The control unit 30 receives signals from various sensors, such as a hydraulic pressure sensor 103 and a wheel speed sensor (not shown) for detecting the rotational speed of the front wheels 217. The various parts of the control unit 30 may be arranged together or distributed. The control unit 30 may include, for example, a microcontroller, a microprocessor unit, or updatable components such as firmware, or program modules that are executed by commands from a CPU or the like.

[0032] The control unit 30 controls the supply of power to coils 61 and 63. Specifically, the control unit 30 controls the drive (opening and closing operation) of the inlet valve 21 by controlling the supply of power to coil 61. The control unit 30 also controls the drive (opening and closing operation) of the outlet valve 22 by controlling the supply of power to coil 63. In other words, the control unit 30 controls the pressure of the brake fluid in the wheel cylinder 251, that is, the braking force of the front wheel 217, by controlling the opening and closing operation of the inlet valve 21 and the outlet valve 22.

[0033] In this embodiment, the circuit board 31, which will be described later, of the control unit 30 controls the supply of power to at least coil 61 and coil 63. That is, the circuit board 31 controls the driving of the inlet valve 21 and outlet valve 22 by controlling the supply of power to coil 61 and coil 63.

[0034] For example, when the front wheel 217 is being braked by the user's operation of the brake lever 241, the control unit 30 determines from the signal of the wheel speed sensor (not shown) that the front wheel 217 is locked or likely to be locked, and starts anti-lock brake control.

[0035] When anti-lock brake control is initiated, the control unit 30 energizes coil 61 and closes inlet valve 21, blocking the flow of brake fluid from master cylinder 242 to wheel cylinder 251, thereby suppressing the increase in brake fluid pressure in wheel cylinder 251. On the other hand, the control unit 30 energizes coil 63 and opens outlet valve 22, allowing the flow of brake fluid from wheel cylinder 251 to accumulator 23, thereby reducing the brake fluid pressure in wheel cylinder 251. This releases or avoids locking of the front wheel 217. When the control unit 30 determines from the signal from hydraulic pressure sensor 103 that the brake fluid in wheel cylinder 251 has been reduced to a predetermined value, it deenerges coil 63 and closes outlet valve 22, and for a short time deenerges coil 61 and opens inlet valve 21 to increase the brake fluid pressure in wheel cylinder 251. The control unit 30 may increase or decrease the pressure of the wheel cylinder 251 only once, or it may repeat this process multiple times.

[0036] When the anti-lock brake control ends and the brake lever 241 is returned, the pressure inside the master cylinder 242 returns to atmospheric pressure, and the brake fluid in the wheel cylinder 251 is returned. Also, when the anti-lock brake control ends and the brake lever 241 is returned, the outlet valve 22 is opened. When the pressure of the brake fluid in the flow path 13 becomes lower than the pressure of the brake fluid stored in the accumulator 23, the brake fluid stored in the accumulator 23 is discharged out of the accumulator 23 without pressure boosting (i.e., without a pump) and returns to the flow path 13, and eventually returns to the master cylinder 242.

[0037] <Configuration of the hydraulic control unit> The configuration of the hydraulic control unit of the brake system according to the embodiment will be described. As will be described later, the hydraulic control unit 1 comprises a base 10 and a housing 40 connected to the base 10. Below, we will explain the configuration of the hydraulic control unit 1 while observing the hydraulic control unit 1 in a state where the housing 40 is positioned above the base 10.

[0038] Figure 3 is a side view of the inside of a hydraulic control unit according to an embodiment of the present invention. More specifically, Figure 3 is a view of the hydraulic control unit 1 in the direction of arrow A in Figure 4, with the front side portion of the housing 40 in the direction of arrow A removed, and the hydraulic control unit 1 viewed from the side. In other words, Figure 3 is a side view of the inside of the hydraulic control unit 1 with the housing 40 positioned above the base 10. Figure 4 shows a pair of connecting parts 80. The connecting parts 80 are not shown in Figure 3. Also, in Figure 3, a part of one of the multiple lid fixing parts 50 and a part of the circuit board 31 are shown in cross-section.

[0039] Figure 4 is a view from above of the inside of a hydraulic control unit according to an embodiment of the present invention. More specifically, Figure 4 is a view from above of the hydraulic control unit 1 with the lid 48 of the housing 40 and the circuit board 31 removed.

[0040] Figure 5 is a side view of the inside of a hydraulic control unit according to an embodiment of the present invention. More specifically, Figure 5 is a view of the hydraulic control unit 1 in the direction of arrow B in Figure 4, with the front portion of the housing 40 in the direction of arrow B removed. In other words, Figure 5 is a side view of the inside of the hydraulic control unit 1 with the housing 40 positioned above the base 10. Note that in Figure 5, the lid fixing portion 50 and the connection portion 80, which are located in front of the coil unit 60 in the direction of arrow B in Figure 4, are omitted from the illustration.

[0041] Figures 6 to 9 are side views of the interior of a hydraulic control unit according to an embodiment of the present invention. Specifically, Figure 6 is a side view of the connection portion 80 of the hydraulic control unit 1 in the direction of arrow C in Figure 4. That is, Figure 6 is a side view of the interior of the hydraulic control unit 1 with the housing 40 positioned above the base 10. Figures 7 and 8 are enlarged partial views showing details of part D in Figure 6. Figure 9 is a side view of the area shown in Figure 8 in the direction of arrow A. Note that Figures 6 to 9 are cross-sectional views of the plane passing through the center of pin 82, but for clarity, pin 82 is not shown as a cross-section.

[0042] The configuration of the hydraulic control unit 1 according to this embodiment will be described below with reference to Figures 3 to 6. The hydraulic control unit 1 comprises a base 10, a housing 40, a coil unit 60, and a circuit board 31.

[0043] The base body 10 is a substantially rectangular parallelepiped member made of, for example, an aluminum alloy. The housing 40 is connected to the upper surface 18 of the base body 10. In this embodiment, the housing 40 is connected to the upper surface 18 of the base body 10 by adhesive. By connecting the base body 10 and the housing 40 by adhesive, the airtightness between the base body 10 and the housing 40 can be improved. Note that each surface of the base body 10 may be flat, may include curved portions, or may include steps.

[0044] The housing 40 has a box-like shape, for example, a roughly rectangular parallelepiped. In this embodiment, the housing 40 is made of resin. That is, the housing 40 is a resin-molded product. The coil unit 60 and the circuit board 31 are housed inside the housing 40. The housing 40 according to this embodiment also comprises a main body 41 and a lid 48. The lower surface 42 of the main body 41 is connected to the upper surface 18 of the base 10 by adhesive. The main body 41 has an opening 43a in the area facing the circuit board 31. In this embodiment, the opening 43a is formed on the upper surface 43 of the main body 41. The lid 48 is a member that covers the opening 43a of the main body 41. In this embodiment, the lid 48 is connected to the main body 41 by adhesive. Specifically, the lower surface of the lid 48 is bonded to the periphery of the opening 43a on the upper surface 43 of the main body 41. By connecting the lid 48 and the main body 41 with adhesive, the airtightness between the lid 48 and the main body 41 can be improved.

[0045] The coil unit 60 includes a coil that drives the hydraulic pressure adjustment valve 20. Specifically, the coil unit 60 includes a coil 61 and a coil 63. The coil unit 60 also includes a coil housing 65 that holds the coil 61 and the coil 63. In this embodiment, the coil housing 65 includes an upper surface portion 66 positioned above the coil 61 and the coil 63, a lower surface portion 67 positioned below the coil 61 and the coil 63, and a side surface portion 68 connecting the upper surface portion 66 and the lower surface portion 67. In this embodiment, a notch 66b is formed in the corner of the upper surface portion 66 of the coil housing 65 that is near the mounting base 90, which will be described later. The side surface portion 68 of the coil housing 65 connects the lower surface portion 67 to the portion of the upper surface portion 66 where the notch 66b is not formed.

[0046] This coil unit 60 is connected to the upper surface 18 of the base body 10. In this embodiment, the coil unit 60 is connected to the upper surface 18 of the base body 10 by adhesive. Specifically, an opening 42a is formed in the lower surface 42 of the main body portion 41 of the housing 40 at a position opposite to the coil unit 60. The coil unit 60 also passes through the opening 42a in the lower surface 42 of the main body portion 41. The lower surface 67 of the coil housing 65 is then connected to the upper surface 18 of the base body 10 by adhesive.

[0047] The circuit board 31 is positioned above the coil unit 60. The circuit board 31 is electrically connected to the connection terminal 62 of coil 61 and the connection terminal 64 of coil 63. This configuration allows the circuit board 31 to control the current supply to coils 61 and 63.

[0048] Here, as shown in Figures 3 to 5, the hydraulic control unit 1 according to this embodiment is equipped with at least one resin arm 70. This embodiment shows an example equipped with two arms 70. One end of one of these arms 70 is held by a first side surface 44a, which is one of the side surfaces of the main body portion 41 of the housing 40. The other end of these arms 70 is held by a second side surface 44b, which is a side surface of the main body portion 41 opposite to the first side surface 44a. These arms 70 are in contact with the upper surface 66a of the upper surface portion 66 of the coil housing 65. In other words, these arms 70 are in contact with the surface of the coil unit 60 that is opposite to the surface that is in contact with the base 10. The arms 70 according to this embodiment are equipped with a projection 71 that protrudes downward near the end opposite to the side that is held by the housing 40. This projection 71 is in contact with the upper surface 66a of the upper surface portion 66 of the coil housing 65. In other words, in this embodiment, the projection 71 is the point of contact between the arm 70 and the coil unit 60.

[0049] In more detail, immediately after the hydraulic control unit 1 is assembled, that is, before the adhesive bonding the base body 10 and the coil unit 60 has hardened, the arm 70 is configured such that the projection 71 is pushed upward by the upper surface 66a of the upper surface portion 66 of the coil housing 65, causing it to elastically deform. Therefore, when the adhesive bonding the base body 10 and the coil unit 60 has not hardened, the reaction force of the arm 70 can press the coil unit 60 toward the base body 10. Thus, the hydraulic control unit 1 according to this embodiment can fix the coil unit 60 to the base body 10 by adhesive.

[0050] As shown in Figures 3 and 4, the hydraulic control unit 1 according to this embodiment is provided with at least one lid fixing portion 50 for fixing the lid 48 to the main body portion 41 of the housing 40. This embodiment shows an example in which there are two lid fixing portions 50. The lid fixing portion 50 is provided inside the space enclosed by the main body portion 41 and the lid 48. The lid fixing portion 50 also includes an engaged portion 51 and an engaging portion 55 that engages with the engaged portion 51. The engaged portion 51 is held by one of the main body portion 41 and the lid 48. The engaging portion 55 is held by the other of the main body portion 41 and the lid 48. This embodiment shows an example in which the engaged portion 51 is held by the main body portion 41 and the engaging portion 55 is held by the lid 48. In this embodiment, of the two components that engage with each other when fixing the lid 48 to the main body portion 41, the one with higher rigidity is designated as the engaged portion 51, and the one with lower rigidity is designated as the engaging portion 55.

[0051] While various structures used in conventional snap-fit ​​structures can be adopted for the specific structure of the engaged portion 51 and the engaging portion 55 of the lid fixing portion 50, in this embodiment, the engaged portion 51 and the engaging portion 55 are structured as follows.

[0052] The engaged portion 51 has a cylindrical shape, such as a roughly cylindrical shape. The engaging portion 55 has a columnar shape, such as a roughly cylindrical shape. The engaging portion 55 extends inward from the engaged portion 51 and engages with the engaged portion 51 from the inside. Specifically, the inner circumference of the engaged portion 51 is provided with a projection 52 that protrudes inward. On the other hand, the tip of the engaging portion 55 is provided with a projection 56 that protrudes outward from the engaging portion 55. The engaging portion 55 engages with the engaged portion 51 from the inside by the projection 56 catching on the projection 52 of the engaged portion 51.

[0053] As shown in Figures 4 and 6, the hydraulic control unit 1 according to this embodiment includes at least one connecting portion 80 that connects the base body 10 and the housing 40. This embodiment shows an example with two connecting portions 80. As described above, the housing 40 according to this embodiment includes a main body portion 41 and a lid 48. Therefore, in this embodiment, the connecting portion 80 connects the base body 10 and the main body portion 41 of the housing 40. The connecting portion 80 includes a recess 81 formed in the base body 10. In the hydraulic control unit 1 according to this embodiment, the main body portion 41 of the housing 40 is connected to the upper surface 18 of the base body 10. Therefore, in this embodiment, the recess 81 is formed in a shape that is recessed downward from the upper surface 18 of the base body 10. The connecting portion 80 also includes a pin 82 that is held by the main body portion 41 of the housing 40, with its lower end portion 83 press-fitted into the recess 81. In other words, the lower end portion 83 of the pin 82 held by the main body portion 41 of the housing 40 is press-fitted into the recess 81 of the base body 10, thereby connecting the base body 10 and the main body portion 41 of the housing 40.

[0054] In conventional hydraulic control units, the connection between the base and the housing is known to be made by fastening a bolt. Here, the bolt has a male threaded portion where a male thread is formed and a head to which a tool is connected. When the width of the bolt is defined as the width perpendicular to the axial direction, the width of the head is large. In other words, in conventional hydraulic control units, miniaturization may be difficult due to the structure of the connection part that connects the base and the housing. On the other hand, in the hydraulic control unit 1 according to this embodiment, the connection part 80 between the base 10 and the housing 40 can be realized with a compact structure, thereby improving the possibility of miniaturization.

[0055] Furthermore, in the hydraulic control unit 1 according to this embodiment, as described above, the base 10 and the main body 41 of the housing 40 are bonded together. Therefore, in the hydraulic control unit 1 according to this embodiment, if a force is applied that pulls the main body 41 of the housing 40 away from the base 10, this force can be received not only by the connection part 80 but also by the adhesive force of the adhesive bonding the base 10 and the main body 41 of the housing 40. Therefore, in the configuration where the base 10 and the main body 41 of the housing 40 are bonded together, the pin 82 of the connection part 80 can be made thinner compared to the configuration where the base 10 and the main body 41 of the housing 40 are not bonded together, and the hydraulic control unit 1 can be made smaller.

[0056] Furthermore, in this embodiment, the hydraulic control unit 1 is equipped with multiple connection parts 80. Therefore, in this embodiment, the main body portion 41 of the housing 40 is fixed to the base 10 at two or more points. Consequently, when connecting the main body portion 41 of the housing 40 to the base 10 using the connection parts 80, the position of the main body portion 41 of the housing 40 can be positioned relative to the base 10. Therefore, by providing multiple connection parts 80, the assembly of the hydraulic control unit 1 becomes easier.

[0057] The material of the pin 82 is not particularly limited; the pin 82 may be made of resin or metal. In the case of a resin pin 82, the assembly man-hours of the hydraulic control unit 1 can be reduced by integrally forming it with the housing 40. On the other hand, since creep does not occur with a metal pin 82, if the pin 82 is made of metal, the decrease in the force connecting the main body 41 of the housing 40 and the base 10 at the connection part 80 over time can be suppressed.

[0058] Furthermore, the configuration in which the main body portion 41 of the housing 40 holds the pin 82 is not particularly limited. It is sufficient that the pin 82 does not come off the main body portion 41 after the assembly of the hydraulic control unit 1 is completed. For example, the pin 82 may be hooked onto a stepped portion of the main body portion 41. If the pin 82 is sandwiched between the stepped portion of the main body portion 41 and the base 10, it is possible to prevent the pin 82 from coming off the main body portion 41 after the assembly of the hydraulic control unit 1 is completed. In this embodiment, the pin 82 is fixed to the main body portion 41 of the housing 40 by molding. Specifically, the pin 82 is fixed by molding in the holding portion 45 of the resin main body portion 41. That is, the holding portion 45 is the part into which the pin 82 is molded. By fixing the pin 82 to the main body portion 41 of the housing 40 by molding, the pin 82 can be held in the main body portion 41 when the main body portion 41 is formed. Therefore, by fixing the pin 82 to the main body portion 41 of the housing 40 by molding, the assembly man-hours for the hydraulic control unit 1 can be reduced.

[0059] Furthermore, in this embodiment, the pin 82 has at least one protrusion 85 on the portion of the pin 82 that is molded onto the main body portion 41 of the housing 40. The protrusion 85 protrudes in a direction not parallel to the direction in which the pin 82 is press-fitted into the recess 81. As shown in Figure 6, etc., in this embodiment, the pin 82 is pushed downward and press-fitted into the recess 81. Therefore, in this embodiment, the protrusion 85 protrudes laterally. By having the protrusion 85 on the pin 82, it is possible to prevent the pin 82 from coming out of the retaining portion 45, and the reliability of the connection between the base 10 and the main body portion 41 of the housing 40 is improved.

[0060] Furthermore, in this embodiment, the end of the pin 82 opposite to the end press-fitted into the recess 81, i.e., the upper end 84 of the pin 82, protrudes from the holding portion 45, which is the part of the main body 41 of the housing 40 that molds the pin 82. This allows the pin 82 to be directly pressed into the recess 81, thus facilitating the assembly of the hydraulic control unit 1.

[0061] Furthermore, in this embodiment, the pin 82 is a plate with substantially uniform thickness in the front-to-back direction of the paper in Figure 6. Because the pin 82 is plate-shaped, the degree of freedom of elastic deformation of the pin 82 is improved, allowing the pin 82 to be press-fitted into the recess 81 while absorbing assembly errors of each component of the hydraulic control unit 1.

[0062] Furthermore, in this embodiment, a through hole 86 is formed at the end of the pin 82 that is press-fitted into the recess 81, that is, at the lower end 83 of the pin 82. As shown in Figures 7 to 9, the through hole 86 is defined by a first branch portion 83a and a second branch portion 83b, each constituting a part of the lower end 83, with both ends connected to each other. This allows the lower end 83 of the pin 82 to elastically deform within the recess 81 when the lower end 83 of the pin 82 is press-fitted into the recess 81. Therefore, by forming a through hole 86 in the lower end 83 of the plate-shaped pin 82, it becomes easier to press-fit the lower end 83 of the pin 82 into the recess 81, and the assembly of the hydraulic control unit 1 is facilitated. As shown in Figures 7 to 9, a reinforcing member 87, separate from the base 10 and the pin 82, abuts against and presses against at least one of the first branch portion 83a and the second branch portion 83b. This configuration reinforces the fixing of the pin 82 after press-fitting. It is preferable that the reinforcing member 87 is press-fitted into the base body 10. Such a configuration ensures reliable reinforcement.

[0063] As an example, as shown in Figure 7, the reinforcing member 87 is a sphere press-fitted into a lateral hole 88 extending from the outer surface of the base body 10 into the recess 81. In this embodiment, the lateral hole 88 is a hole that opens on one of two opposing sides 19 of the base body 10 in a direction perpendicular to the thickness direction of the plate-shaped pin 82, and whose axis is perpendicular to the axis of the recess 81. The lateral hole 88 only needs to intersect with the recess 81. In other words, the opening of the lateral hole 88 may be formed on other surfaces of the base body 10, such as the top surface 18 or the other side surface 19. The reinforcing member 87 is press-fitted after the pin 82 is press-fitted into the recess 81 and the base body 10 and the housing 40 are connected. The reinforcing member 87 is press-fitted to a position where it abuts against the first branch portion 83a or the second branch portion 83b and a pressing force is applied. With such a configuration, reinforcement is made more reliable. In particular, in a direction parallel to the axis of the recess 81, the position where the reinforcing member 87 and the pin 82 come into contact should be closer to the upper surface 18 of the base 10 compared to the widest part of the lower end portion 83 of the pin 82. Such a configuration ensures reliable reinforcement. Although Figure 7 shows a state in which the sphere serving as the reinforcing member 87 comes into contact with the second branch portion 83b, the sphere serving as the reinforcing member 87 may also come into contact with the first branch portion 83a, or separate spheres serving as the reinforcing member 87 may come into contact with the first branch portion 83a and the second branch portion 83b, respectively.

[0064] As an example, as shown in Figures 8 and 9, the reinforcing member 87 is a columnar body that is press-fitted into a lateral hole 88 extending from the outer surface of the base body 10 into the recess 81. The lateral hole 88 penetrates the recess 81. In this embodiment, the lateral hole 88 is a hole that opens on one of two opposing side surfaces 19 of the base body 10 in a direction parallel to the thickness direction of the plate-shaped pin 82, and whose axis is perpendicular to the axis of the recess 81. The lateral hole 88 only needs to intersect with the recess 81. In other words, the opening of the lateral hole 88 may also be formed on other surfaces of the base body 10, such as the top surface 18 or the other side surface 19. The reinforcing member 87 is press-fitted after the pin 82 is press-fitted into the recess 81 and the base body 10 and the housing 40 are connected. The reinforcing member 87 passes completely across the recess 81 through the space between the first branch portion 83a and the second branch portion 83b, and is press-fitted to a position where it is pressed-fitted again into the lateral hole 88 on the inner side of the pin 82. Such a configuration ensures reinforcement. In particular, it is preferable that the reinforcing member 87 is also press-fitted between the first branch portion 83a and the second branch portion 83b, i.e., through hole 86. Such a configuration ensures reinforcement. Furthermore, another lateral hole 88 may be formed in the base 10 in a direction perpendicular to the thickness direction of the plate-shaped pin 82, and a sphere as another reinforcing member 87, as shown in Figure 7, may be added.

[0065] As shown in Figures 3 to 5, the hydraulic control unit 1 according to this embodiment includes at least one mounting platform 90 held in the housing 40. This embodiment shows an example with two mounting platforms 90. As described above, the housing 40 according to this embodiment includes a main body 41 and a lid 48. In this embodiment, the mounting platform 90 is held in the main body 41 of the housing 40.

[0066] The mounting base 90 is positioned at least partially below a portion of the coil housing 65 of the coil unit 60. The mounting base 90 supports a portion of the coil housing 65 of the coil unit 60 before the coil unit 60 and the main body 41 of the housing 40 are connected to the base 10.

[0067] Although embodiments have been described above, the present invention is not limited to the descriptions of embodiments. For example, only a part of the descriptions of embodiments may be implemented.

[0068] For example, the above describes a case in which the reinforcing member 87 is press-fitted into a lateral hole 88 extending from the outer surface of the base body 10 into the recess 81. However, the present invention may also describe a case in which the reinforcing member 87 reinforces the connection between the base body 10 and the housing 40 in other ways. That is, the reinforcing member 87 may be an annular body that is press-fitted into the recess 81 after the lower end portion 83 of the pin 82 has been press-fitted into the recess 81. In such a case, the reinforcing member 87 abuts against and presses against the first branch portion 83a and the second branch portion 83b, surrounding the region located above the lower end portion 83 of the pin 82. [Explanation of Symbols]

[0069] 1 Hydraulic control unit, 10 Base body, 11 Master cylinder port, 12 Wheel cylinder port, 13 Flow path, 14 First flow path, 15 Second flow path, 16 Third flow path, 17 Fourth flow path, 18 Top surface, 19 Side surface, 20 Hydraulic pressure adjustment valve, 21 Inlet valve, 22 Outlet valve, 23 Accumulator, 30 Control unit, 31 Circuit board, 40 Housing, 41 Main body, 42 Bottom surface, 42a Opening, 43 Top surface, 43a Opening, 44a First side surface, 44b Second side surface, 45 Holding part, 48 Lid, 50 Lid fixing part, 51 Engaged part, 52 Protrusion, 55 Engagement part, 56 Protrusion, 60 Coil unit, 61 Coil, 62 Connection terminal, 63 Coil, 64 Connection terminal, 65 Coil housing, 66 Top surface, 66a Top surface, 66b Notch, 67 Bottom surface, 68 Side surface, 70 Arm, 71 Projection, 80 Connection part, 81 Recess, 82 Pin, 83 Lower end, 83a First branch, 83b Second branch, 84 Upper end, 85 Protruding part, 86 Through hole, 87 Reinforcement member, 88 Side hole, 90 Mounting platform, 100 Brake system, 101 Fluid tube, 102 Fluid tube, 103 Hydraulic pressure sensor, 200 Bicycle, 210 Frame, 211 Head tube, 212 Top tube, 213 Down tube, 214 Seat tube, 215 Stay, 216 Front fork, 217 Front wheel, 218 Saddle, 219 Pedal, 220 Rear wheel, 230 Swivel section, 231 Steering column, 232 Handle stem, 233 Handlebar, 240 Brake control unit, 241 Brake lever, 242 Master cylinder, 243 Reservoir, 250 Front wheel brake unit, 251 Wheel cylinder, 252 Rotor, 260 Rear wheel brake unit, 270 Power unit.

Claims

1. A hydraulic control unit (1) of a brake system (100) mounted on a saddle-type vehicle (200), A base body (10) in which a brake fluid flow path (13) is formed, A circuit board (31) controls the drive of a hydraulic pressure adjustment valve (20) that opens and closes the aforementioned flow path (13), The housing (40) in which the circuit board (31) is housed, A connecting portion (80) that connects the base (10) and the housing (40), It is equipped with, The aforementioned connecting portion (80) is The recess (81) formed in the substrate (10), A pin (82) is held in the housing (40) and has its end (83) press-fitted into the recess (81), It is equipped with, The end portion (83), which is press-fitted into the recess (81), has a through hole (86) formed in it. The outer edge of the through hole (86) is defined by a first branch (83a) and a second branch (83b) of the end portion (83) which is press-fitted into the recess (81), and whose ends are connected to each other. The reinforcing member (87), which is separate from the base (10) and the pin (82), is in contact with and pressing against at least one of the first branch portion (83a) and the second branch portion (83b). Hydraulic control unit (1).

2. The reinforcing member (87) is press-fitted into a lateral hole (88) extending from the outer surface of the base body (10) to the recess (81). The hydraulic control unit (1) according to claim 1.

3. The reinforcing member (87) is a sphere that abuts against the first branch (83a) or the second branch (83b). The hydraulic control unit (1) according to claim 2.

4. The reinforcing member (87) is a columnar body that penetrates between the first branch (83a) and the second branch (83b). The hydraulic control unit (1) according to claim 2.

5. The base (10) and the housing (40) are bonded together. A hydraulic control unit (1) according to any one of claims 1 to 4.

6. The device comprises a plurality of the aforementioned connecting parts (80), A hydraulic control unit (1) according to any one of claims 1 to 4.

7. The aforementioned pin (82) is made of metal. A hydraulic control unit (1) according to any one of claims 1 to 4.

8. The housing (40) is a resin molded product, The pin (82) is fixed to the housing (40) by molding. The hydraulic control unit (1) according to claim 7.

9. The pin (82) has a projection (85) on the portion of the pin (82) molded into the housing (40) that protrudes in a direction not parallel to the direction in which the pin (82) is press-fitted into the recess (81). The hydraulic control unit (1) according to claim 8.

10. The end (84) of the pin (82) opposite to the end (83) which is press-fitted into the recess (81) protrudes from the portion (45) of the housing (40) that molds the pin (82). The hydraulic control unit (1) according to claim 8.

11. The housing (40) is a resin molded product, The housing (40) and the pin (82) are integrally formed products. A hydraulic control unit (1) according to any one of claims 1 to 4.

12. The pin (82) is plate-shaped. A hydraulic control unit (1) according to any one of claims 1 to 4.

13. A method for manufacturing a hydraulic control unit (1) of a brake system (100) mounted on a saddle-type vehicle (200), The hydraulic control unit (1) is A base body (10) in which a brake fluid passage (13) is formed, A circuit board (31) controls the drive of a hydraulic pressure adjustment valve (20) that opens and closes the aforementioned flow path (13), The housing (40) in which the circuit board (31) is housed, It is equipped with, The end (83) of the pin (82) held in the housing (40) is press-fitted into the recess (81) formed in the base (10), thereby connecting the base (10) and the housing (40). The end portion (83), which is press-fitted into the recess (81), has a through hole (86) formed in it. The outer edge of the through hole (86) is defined by a first branch (83a) and a second branch (83b) of the end portion (83) which is press-fitted into the recess (81), and whose ends are connected to each other. The reinforcing member (87), which is separate from the base body (10) and the pin (82), is press-fitted into a lateral hole (88) extending from the outer surface of the base body (10) into the recess (81) into which the end portion (83) is press-fitted, to a position where it abuts against at least one of the first branch portion (83a) and the second branch portion (83b) and a pressing force is applied. A method for manufacturing a hydraulic control unit (1).

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