Hydraulic pressure control unit for straddle-type vehicle and method for manufacturing hydraulic pressure control unit
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-08-13
Smart Images
Figure IB2026050724_13082026_PF_FP_ABST
Abstract
Description
[0001]
Document Name
[0002]
Title of the Invention
Technical Field
[0003]
.001
[0004] The present invention relates to a hydraulic control unit mounted on a straddle-type vehicle, a straddle-type vehicle equipped with the hydraulic control unit, and a method of manufacturing a hydraulic control unit mounted on a straddle-type vehicle.
[0005]
Background Art
[0006]
.002
[0007] Conventional vehicles include those equipped with a hydraulic control unit that controls the hydraulic pressure of the brake fluid in a hydraulic circuit filled with brake fluid. The hydraulic control unit, for example, increases or decreases the hydraulic pressure of the brake fluid in the hydraulic circuit while the driver of the vehicle is operating an input part such as a brake lever, adjusts the braking force generated on the wheels, and executes antilock brake control. Such a hydraulic control unit includes a base body in which an internal flow path through which the brake fluid flows is formed, and a motor unit that is a drive source of a pump device provided in the internal flow path. Further, such a hydraulic control unit includes a speed reducer connected to the output shaft of the motor unit, and a bearing having a shaft insertion portion into which the output shaft of the speed reducer is inserted. The bearing is provided on the base body (see, for example, Patent Document 1).
[0008]
Prior Art Documents
[0009]
Patent Documents
[0010]
〇003
[0011]
Patent Document 1
[0012]
Summary of the Invention
[0013]
Problems to be Solved by the Invention
[0014]
〇004
[0015] Saddle-type vehicles, a type of vehicle, have less flexibility in component layout and less flexibility in mounting hydraulic control units compared to vehicles such as four-wheeled automobiles. Therefore, miniaturization of hydraulic control units mounted on saddle-type vehicles is desired. The inventor considered a configuration in which the motor unit drives the pump device without a reduction gear, thereby miniaturizing the hydraulic control unit. In other words, the inventor conceived of a hydraulic control unit without a reduction gear. However, removing the reduction gear from the hydraulic control unit creates the following new problems.
[0016]
〇 0 0 5
[0017] In conventional hydraulic control units equipped with a gearbox, even if the motor unit and bearings are misaligned from their specified positions during assembly, these misalignments are absorbed by the gaps between the components of the gearbox located between the motor unit and the bearings. Therefore, conventional hydraulic control units with gearboxes were easy to assemble even if the motor unit and bearings were misaligned. On the other hand, in hydraulic control units without a gearbox, the output shaft of the motor unit is inserted into the shaft insertion part of the bearing. That is, in hydraulic control units without a gearbox, there is no gearbox between the motor unit and the bearing to absorb any misalignment between them. Therefore, in hydraulic control units without a gearbox, if the motor unit and bearings are misaligned from their specified positions during assembly, even if the misalignment is the same as in conventional hydraulic control units, it becomes difficult to insert the output shaft of the motor unit into the shaft insertion part of the bearing. Thus, hydraulic control units without a gearbox present the challenge of being more difficult to assemble compared to conventional hydraulic control units equipped with a gearbox.
[0018]
〇 0 0 6
[0019] The present invention was made against the backdrop of the above-mentioned problems, and its first objective is to provide a hydraulic control unit that is easy to assemble even when the motor unit drives the pump device without the use of a reduction gear. The second objective of the present invention is to provide a saddle-type vehicle equipped with such a hydraulic control unit. The third objective of the present invention is to provide a method for manufacturing a hydraulic control unit that is easy to assemble even when the motor unit drives the pump device without the use of a reduction gear.
[0020] [Means for solving the problem]
[0021] [ 0 0 0 7 ]
[0022] The hydraulic control unit according to the present invention is a hydraulic control unit mounted on a saddle-type vehicle, comprising: a base body having an internal passage through which brake fluid flows; a motor unit which is a drive source for a pump device provided in the internal passage, and has a stator, a rotor, an output shaft fixed to the rotor, and a cover provided on the outer circumference of the stator; and a bearing provided on the base body and having a shaft insertion portion into which the output shaft is inserted, wherein the cover has a cylindrical portion that covers the outer circumference of the stator, the base body has a recess into which at least the end of the cylindrical portion on the side in which the output shaft protrudes is inserted, the bearing and the recess are aligned in the direction in which the output shaft extends, and the recess has a first guide on its inner circumference that guides the tip of the output shaft to the shaft insertion portion when the cylindrical portion is inserted.
[0023] [ 0 0 0 8 ]
[0024] Furthermore, the saddle-type vehicle according to the present invention is equipped with a hydraulic control unit according to the present invention.
[0025] [ 0 0 0 9 ]
[0026] Furthermore, the manufacturing method for a hydraulic control unit according to the present invention is a manufacturing method for a hydraulic control unit mounted on a saddle-type vehicle, wherein the hydraulic control unit comprises a base body having an internal passage through which brake fluid flows, a motor unit which is a drive source for a pump device provided in the internal passage and has a stator, a rotor, an output shaft fixed to the rotor, and a cover provided on the outer circumference of the stator, and a bearing provided on the base body and having a shaft insertion portion into which the output shaft is inserted, wherein the cover has a cylindrical portion that covers the outer circumference of the stator, the base body has a recess into which at least the end of the cylindrical portion on the side in which the output shaft protrudes is inserted, the bearing and the recess are arranged in the direction in which the output shaft extends, and the recess has a guide on its inner circumference that guides the tip of the output shaft to the shaft insertion portion when the cylindrical portion is inserted, and the manufacturing method comprises a first insertion step of inserting the cylindrical portion into the guide, and a second insertion step of inserting the output shaft into the shaft insertion portion after the first insertion step. [Effects of the Invention]
[0027] [ 0 0 1 0 ]
[0028] In the hydraulic control unit according to the present invention, during assembly, the cylindrical portion of the motor unit cover is inserted into the first guide in the recess, thereby guiding the tip of the motor unit's output shaft to the shaft insertion portion of the bearing. Therefore, even in a configuration where the motor unit drives the pump device without a reduction gear, the hydraulic control unit according to the present invention is easy to assemble.
[0029] [Brief explanation of the drawing]
[0030] [ 0 0 1 1 ]
[0031] [Figure 1] This figure shows the configuration of a saddle-type vehicle equipped with a brake system that includes a hydraulic control unit according to an embodiment of the present invention.
[0032] [Figure 2] This figure shows the configuration of a brake system equipped with a hydraulic control unit according to an embodiment of the present invention.
[0033] [Figure 3] This is a partial cross-sectional view of a hydraulic control unit according to an embodiment of the present invention, viewed from the side.
[0034] [Figure 4] This is a cross-sectional view showing the area around the first guide of a hydraulic control unit according to an embodiment of the present invention.
[0035] [Figure 5] A cross-sectional view showing the area around the bearing of a hydraulic control unit according to an embodiment of the present invention. [Figure 6] A flowchart illustrating the manufacturing method of a hydraulic control unit according to an embodiment of the present invention.
[0036] [Figure 7] This is a partial cross-sectional view of a hydraulic control unit according to an embodiment of the present invention, viewed from the side, and is a partial cross-sectional view of a hydraulic control unit in the process of assembly, viewed from the side. [Figure 8] This is a diagram illustrating a modified example of a hydraulic control unit according to an embodiment of the present invention, and is a cross-sectional view showing the area around the bearing of the hydraulic control unit.
[0037] [Modes for carrying out the invention]
[0038] [ 0 0 1 2 ]
[0039] The hydraulic control unit, saddle-type vehicle, and method for manufacturing the hydraulic control unit according to the present invention will be described below with reference to the drawings.
[0040] In the following, an example of the hydraulic control unit according to the present invention being mounted on a motorcycle, which is an example of a saddle-type vehicle, will be described. However, the hydraulic control unit according to the present invention may also be mounted on other saddle-type vehicles other than motorcycles. Other saddle-type vehicles other than motorcycles include, for example, bicycles (e.g., two-wheeled vehicles, three-wheeled vehicles, etc.), three-wheeled vehicles powered by at least one of an engine and an electric motor, and buggies. Furthermore, "bicycle" refers to any vehicle that can be propelled on the road by the force applied to the pedals. In other words, bicycles include ordinary bicycles, electric assist bicycles, electric bicycles, etc. Furthermore, "two-wheeled vehicle" or "three-wheeled vehicle" refers to a so-called motorcycle, and motorcycles include motorcycles, scooters, electric scooters, etc.
[0041] [ 0 0 1 3 ]
[0042] In the following, an example in which the hydraulic control unit according to the present invention is adopted in a braking system equipped with a single hydraulic circuit is described. However, the number of hydraulic circuits in the braking system in which the hydraulic control unit according to the present invention is adopted is not limited to one. The braking system in which the hydraulic control unit according to the present invention is adopted may be equipped with two or more hydraulic circuits.
[0043] [ 0 0 1 4 ]
[0044] In addition, the configurations, operations, etc. described below are examples, and the present invention is not limited to such configurations, operations, etc. Also, in each figure, the same or similar members or parts may be given the same reference numerals or the assignment of reference numerals may be omitted. Also, for the detailed structure, the illustration is appropriately simplified or omitted.
[0045] [ 0 0 1 5 ]
[0046] Embodiment.
[0047] <Configuration and Operation of Braking System for Straddle-Type Vehicle>
[0048] FIG. 1 is a diagram showing the configuration of a straddle-type vehicle on which a braking system equipped with a hydraulic control unit according to an embodiment of the present invention is mounted. FIG. 2 is a diagram showing the configuration of a braking system equipped with a hydraulic control unit according to an embodiment of the present invention.
[0049] [ 0 0 1 6 ]
[0050] As shown in FIGS. 1 and 2, the braking system 1〇 is mounted on the straddle-type vehicle 200. The straddle-type vehicle 200 is, for example, a motorcycle having an engine or a motor as a drive source. The straddle-type vehicle 200 includes a body 1, a handle 2 rotatably held on the body 1, a front wheel 3 rotatably held on the body 1 together with the handle 2, and a rear wheel 4 rotatably held on the body 1.
[0051] [ 0 0 1 7 ]
[0052] Brake system 1 includes a brake lever 11 and a hydraulic circuit 12 filled with brake fluid. The brake lever 11 is located on the handle 2 and is operated by the driver's hand. The hydraulic circuit 12 generates a braking force on the rotor 3a, which rotates with the front wheel 3, in accordance with the amount of operation of the brake lever 11. A braking force is also generated on the rotor 4a, which rotates with the rear wheel 4, in accordance with the amount of operation of the brake pedal 13. The brake pedal 13 is located at the bottom of the body 1 and is operated by the driver's foot. The mechanism that generates the braking force in accordance with the amount of operation of the brake pedal 13 may be a mechanism that generates braking force by increasing the pressure of the brake fluid, or it may be a mechanism that generates braking force mechanically (for example, a mechanism that generates braking force by creating tension in a wire).
[0053] [ 0 0 1 8 ]
[0054] Here, the brake lever 11 and brake pedal 13 are examples of brake input points. For example, a brake pedal other than the brake pedal 13 provided on the body 1 may be used as a brake input point instead of the brake lever 11. Also, for example, a brake lever other than the brake lever 11 provided on the handle 2 may be used as a brake input point instead of the brake pedal 13.
[0055] [ 0 0 1 9 ]
[0056] The hydraulic circuit 12 includes a master cylinder 21 having a piston (not shown), a reservoir 22 attached to the master cylinder 21, a brake caliper 23 having brake pads (not shown), and a wheel cylinder 24 that operates the brake pads (not shown) of the brake caliper 23.
[0057] [ 0 0 2 0 ]
[0058] The base 1 1 0 of the hydraulic control unit 1 00 has an internal passage 4 0 that connects the wheel cylinder 2 4 and the master cylinder 2 1. That is, the base 1 1 0 has an internal passage 4 0 through which brake fluid flows. The internal passage 4 0 is in communication with the master cylinder 2 1 via the fluid pipe 1 5 described later, and is in communication with the wheel cylinder 2 4 via the fluid pipe 1 6 described later. In this embodiment, the base 1 1 0 has a main passage 4 1 and a sub-passage 4 2 formed as the internal passage 4 0. In the hydraulic circuit 12, the master cylinder 21 and the wheel cylinder 24 are connected via a fluid pipe 15 between the master cylinder 21 and the master cylinder port MP formed in the base 11〇, a main flow path 41 formed in the base 11〇, and a fluid pipe 16 between the wheel cylinder 24 and the wheel cylinder port WP formed in the base 11〇. In addition, the brake fluid from the wheel cylinder 24 is released via a sub-flow path 42 to a main flow path intermediate section 41a, which is an intermediate part of the main flow path 41.
[0059] [ 0 0 2 1 ]
[0060] A stop valve 25 is provided in the main flow path 41, in the region closer to the wheel cylinder 24 than the intermediate section 41a of the main flow path. The opening and closing operation of the stop valve 25 opens and closes the flow path portion of the main flow path 41 where the stop valve 25 is installed, thereby controlling the flow rate of brake fluid circulating in this region. The secondary flow path 42 is provided with, in order from the upstream side, a release valve 26, an accumulator 27 for storing brake fluid, and a pump device 50. That is, the pump device 50 is installed in the internal flow path 40. The opening and closing operation of the release valve 26 opens and closes the flow path portion of the secondary flow path 42 where the release valve 26 is installed, thereby controlling the flow rate of brake fluid circulating in this region. The pump device 50 applies pressure to the brake fluid in the sub-flow channel 42, thereby moving the brake fluid. In other words, the pump device 50 moves the brake fluid in the internal flow channel 40. The type of pump device 50 is not particularly limited.
[0061] [ 0 0 2 2 ]
[0062] Furthermore, a master cylinder hydraulic pressure sensor 3〇 is provided in the region of the main flow path 41 on the master cylinder 21 side of the suction valve 25 to detect the hydraulic pressure of the brake fluid in the master cylinder 21. Also, a wheel cylinder hydraulic pressure sensor 31 is provided in the region of the main flow path 41 on the wheel cylinder 24 side of the suction valve 25 to detect the hydraulic pressure of the brake fluid in the wheel cylinder 24.
[0063] [ 0 0 2 3 ]
[0064] In other words, the main passage 41 connects the master cylinder port MP and the wheel cylinder port WP via the filling valve 25. The secondary passage 42 is defined as a passage that releases part or all of the brake fluid from the wheel cylinder 24 to the master cylinder 21 via the release valve 26. That is, the secondary passage 42 also connects the master cylinder port MP and the wheel cylinder port WP.
[0065] [ 0 0 2 4 ]
[0066] The suction valve 2 5 is a solenoid valve that, for example, switches the flow of brake fluid at its installation location from open to closed when the system is energized from a non-energized state. The release valve 2 6 is a solenoid valve that, for example, switches the flow of brake fluid toward the accumulator 2 7 via its installation location from closed to open when the system is energized from a non-energized state.
[0067] [0 0 2 5] The pump device 50 of the hydraulic circuit 12 is driven by the motor unit 70. That is, the motor unit 70 is the power source for the pump device 50.
[0068] [0 0 2 6] The hydraulic control unit 100 is composed of a base 110, various components provided on the base 110 (such as a filling valve 25, a release valve 26, an accumulator 27, a master cylinder hydraulic pressure sensor 30, a wheel cylinder hydraulic pressure sensor 31, a pump device 50, a motor unit 70, etc.), and a control unit (ECU) 60.
[0069] [0 0 2 7] The control device 60 controls the inlet valve 25, the release valve 26, and the motor unit 70. The control device 60 may be a single unit or may be divided into multiple units. The control device 60 may be attached to the base 11〇, or to other components other than the base 11〇. Furthermore, part or all of the control device 60 may be composed of, for example, a microcontroller, a microprocessor unit, etc., or may be composed of updatable components such as firmware, or may be a program module executed by commands from a CPU, etc. In this embodiment, as will be described later, at least a part of the control device 6〇 is configured as a control board 61.
[0070] [0 0 2 8] For example, under normal conditions, the control device 6 0 controls the loading valve 2 5 and the release valve 2 6 to a de-energized state. In this state, when the brake lever 1 1 is operated, the piston (not shown) of the master cylinder 2 1 is pushed in, increasing the hydraulic pressure of the brake fluid in the wheel cylinder 2 4, and the brake pads (not shown) of the brake caliper 2 3 are pressed against the rotor 3a of the front wheel 3, thereby braking the front wheel 3.
[0071] [0 0 2 9] The control device 60 receives the outputs of each sensor (master cylinder hydraulic pressure sensor 30, wheel cylinder hydraulic pressure sensor 31, wheel speed sensor, acceleration sensor, etc.). In response to these outputs, the control device 60 outputs commands that control the operation of the fill valve 25, release valve 26, and motor unit 70, and performs pressure reduction control operations, etc.
[0072] [ 0 0 3 0 ] For example, if the control device 60 detects an excess or potential excess of brake fluid pressure in the wheel cylinder 24, it performs a pressure reduction control operation to reduce the brake fluid pressure in the wheel cylinder 24 in the hydraulic circuit 12. At that time, the control device 60 controls the fill valve 25 to be energized and the release valve 26 to be energized in the hydraulic circuit 12, while driving the motor unit 70. As a result, the brake fluid in the wheel cylinder 24 flows through the main passage 41 to the sub-passage 42, and the brake fluid pressure in the wheel cylinder 24 decreases. The brake fluid that has flowed from the wheel cylinder 24 to the sub-passage 42 then flows through the release valve 26 to the accumulator 27 and is stored in the accumulator 27. Furthermore, the brake fluid stored in the accumulator 27 is returned to the master cylinder 21 by a pump device 50 driven by the motor unit 70. In other words, the hydraulic control unit 100 can control the hydraulic pressure of the brake fluid in the wheel cylinder 24 to perform pressure reduction control operation (in other words, anti-lock brake control) of the hydraulic circuit 12.
[0073] [0 0 3 1] Configuration of the hydraulic control unit > Figure 3 is a partial cross-sectional view of the hydraulic control unit according to an embodiment of the present invention, viewed from the side. Figure 4 is a cross-sectional view showing the area around the first guide of the hydraulic control unit according to an embodiment of the present invention. Figure 5 is a cross-sectional view showing the area around the bearing of the hydraulic control unit according to an embodiment of the present invention. Note that Figure 4 is a diagram showing part A of Figure 3. Also, Figure 5 is a diagram showing part B of Figure 3. Furthermore, Figures 3 to 5 are diagrams showing the hydraulic control unit 1〇〇 observed in an observation direction perpendicular to the direction in which the output shaft 73 of the motor unit 70 extends.
[0074] [ 0 0 3 2 ]
[0075]
[0076] The base body 11〇 is made of a metal such as an aluminum alloy and has a roughly rectangular parallelepiped shape. Each side of the base body 11〇 may be flat, include curved sections, or include steps. A motor unit 70 is provided on one side surface 110a of the base body 110. In this embodiment, a suction valve 25 and a release valve 26 are also provided on surface 110a of the base body 11〇. The motor unit 7〇, suction valve 25, and release valve 26 are covered by a housing 120 that houses a control board 61. The motor unit 70, suction valve 25, and release valve 26 are electrically connected to the control board 61 by terminals or the like. In other words, in the hydraulic control unit 1〇〇 according to this embodiment, the motor unit 70 is located within the space enclosed by the base 110 and the housing 120. A hydraulic control unit 1〇〇 configured in this way can be made smaller compared to the case where the motor unit 70 is located outside the housing 12〇. However, the motor unit 7〇 may also be located outside the housing 12〇.
[0077] [ 0 0 3 3 ]
[0078] The motor unit 70 comprises a stator 71, a rotor 72, an output shaft 73, and a cover 80. The output shaft 73 is fixed to the rotor 72 and rotatably supported by a bearing (not shown). This allows the rotor 72, positioned on the inner circumference of the stator 71, to rotate on the inner circumference of the stator 71 without interfering with it. The cover 80 is provided on the outer circumference of the stator 71. The bearing (not shown) that rotatably supports the output shaft 73 is fixed to the cover 80, for example. This cover 80 includes a cylindrical portion 81 that covers the outer circumference of the stator 71.
[0079] [ 0 0 3 4 ]
[0080] Here, the method of fixing the motor unit 7 to the base 11 is not particularly limited, but in this embodiment, the motor unit 7 is fixed to the base 11 by a so-called crimping process. This reduces the space required for fasteners such as bolts to fix the motor unit 7 to the base 11, and allows for miniaturization of the hydraulic control unit 100.
[0081] [ 0 0 3 5 ]
[0082] Specifically, the cover 80 of the motor unit 70 has a flange 82 that protrudes from the outer circumferential surface of the cylindrical portion 81 outwards from the cylindrical portion 81. On the other hand, the base body 110 has a flange recess 113 into which the flange 82 of the cover 80 is inserted, and a plastically deformable portion 114 that protrudes to the inner circumference of the flange recess 113. More specifically, the plastically deformable portion 114 is formed by plastically deforming the edge of the flange recess 113. The motor unit 70 is then fixed to the base body 110 by the flange 82 of the cover 80 being sandwiched between the bottom portion 113a of the flange recess 113 and the plastically deformable portion 114.
[0083] [ 0 0 3 6 ]
[0084] Figure 3 shows the base body 110 before the plastic deformation portion 114 is formed. Therefore, in Figure 3, the plastic deformation portion 114 is shown with dashed lines. In this embodiment, the cylindrical portion 81 is configured to cover the end of the stator 71. However, the cylindrical portion 81 may not cover the end of the stator 71.
[0085] [ 0 0 3 7 ]
[0086] Incidentally, conventional hydraulic control units include a reduction gear connected to the output shaft of a motor unit, and a bearing having a shaft insertion portion into which the output shaft of the reduction gear is inserted. The bearing is also provided on a base. On the other hand, the hydraulic control unit 100 according to this embodiment is configured to drive the pump device 50 with the output shaft 73 of the motor unit 70 without going through a reduction gear, in order to further reduce size. In other words, the hydraulic control unit 100 according to this embodiment does not have a reduction gear. Specifically, the pump device 50 according to this embodiment is a reciprocating pump. In such a case, an eccentric part 74 that rotates eccentrically with respect to the rotation center of the output shaft 73 of the motor unit 70 is attached to the output shaft 73. Then, the eccentric rotational motion of the eccentric part 74 presses one end of the plunger 51 of the pump device 50 against the eccentric part 74, causing the plunger 51 to reciprocate and thereby drive the pump device 50.
[0087] [0 0 3 8] In this configuration, where the pump device 5〇 is driven by the output shaft 73 of the motor unit 70 without a reduction gear, the output shaft 73 of the motor unit 70 is supported as shown in Figure 3. Specifically, the base 11〇 is provided with a bearing 1〇1 having a shaft insertion portion 1〇2. The output shaft 73 of the motor unit 7〇 is inserted into the shaft insertion portion 1〇2 and is rotatably supported by the bearing 1〇1. In this embodiment, a recess 111, which will be described later, is provided at the bottom 113a of the flange recess 113. Furthermore, a bearing recess 115 is provided at the bottom of the recess 111. The bearing 1 0 1 is provided in the bearing recess 1 1 5. The bearing may be a bush or a rolling bearing. In this embodiment, a bush is used as the bearing 1 0 1. A bush is sometimes also called a sliding bearing.
[0088] [ 0 0 3 9 ]
[0089] Removing the gearbox from the hydraulic control unit creates the following new challenges. In a conventional hydraulic control unit equipped with a gearbox, even if the motor unit and bearings are misaligned from their designated positions during assembly, these misalignments are absorbed by the gaps between the gearbox components located between the motor unit and the bearings. Therefore, conventional hydraulic control units equipped with a gearbox were easy to assemble even if the motor unit and bearings were misaligned from their designated positions. On the other hand, in a hydraulic control unit without a gearbox, the output shaft of the motor unit is inserted into the shaft insertion part of the bearing. In other words, in a hydraulic control unit without a gearbox, there is no gearbox between the motor unit and the bearing to absorb the misalignment between the motor unit and the bearing. Therefore, in a hydraulic control unit without a gearbox, if the motor unit and bearing are misaligned from their designated positions during assembly, it becomes difficult to insert the output shaft of the motor unit into the shaft insertion part of the bearing, even if the amount of misalignment is the same as in a conventional hydraulic control unit. Thus, hydraulic control units without a gearbox are more difficult to assemble compared to conventional hydraulic control units that do have a gearbox.
[0090] [ 0 0 4 0 ]
[0091] Therefore, the hydraulic control unit 100 according to this embodiment is configured as follows to facilitate assembly even when the motor unit 70 drives the pump device 50 without going through a reduction gear.
[0092] [ 0 0 4 1 ]
[0093] The base 110 has a recess 111. At least the end 81a of the cylindrical portion 81 of the motor unit 70 cover 80 on the side where the output shaft 73 protrudes is inserted into the recess 111. The recess 111 and the bearing 101 are aligned in the direction in which the output shaft 73 extends. The recess 111 has a guide in at least a part of its inner circumference that guides the tip 3a of the output shaft 3 to the shaft insertion portion 102 of the bearing 101 when the cylindrical portion 81 is inserted. Hereinafter, in order to distinguish this guide from the second guide 103 which will be described later, this guide will be referred to as the first guide 112. Guide 112, for example, has a roughly cylindrical shape.
[0094] [ 0 0 4 2 ]
[0095] By reducing the clearance C1 between the first guide 112 and the cylindrical portion 81 of the motor unit 70's cover 80, when the cylindrical portion 81 is inserted into the first guide 112, the misalignment of the output shaft 73 relative to the shaft insertion portion 102 of the bearing 1〇! is restricted. Therefore, when the cylindrical portion 81 is inserted into the first guide 112, the tip portion 73a of the output shaft 73 is guided to the shaft insertion portion 1〇2 of the bearing 1〇!. Note that the expression "reducing the clearance C1 between the first guide 112 and the cylindrical portion 81" also includes a configuration in which the clearance C1 between the first guide 112 and the cylindrical portion 81 is set to 〇. In other words, the expression "reducing the clearance C1 between the first guide 112 and the cylindrical portion 81" also includes a configuration in which the first guide 112 and the cylindrical portion 81 are in contact.
[0096] [ 0 0 4 3 ]
[0097] In the hydraulic control unit 100 configured in this way, during assembly, the cylindrical portion 81 of the cover 80 of the motor unit 70 is inserted into the first guide 112 of the recess 111, thereby guiding the tip 73a of the output shaft 3 of the motor unit 70 into the shaft insertion portion 102 of the bearing 101. For this reason, the hydraulic control unit 100 configured in this way is easy to assemble even if the motor unit 70 drives the pump device 50 without a reduction gear.
[0098] [ 0 0 4 4 ]
[0099] Furthermore, for the first guide 112 to perform the above-described function, at the moment the cylindrical portion 81 of the cover 8〇 of the motor unit 70 is inserted into the first guide 112, the tip portion 73a of the output shaft 73 of the motor unit 70 must not yet be inserted into the shaft insertion portion 102 of the bearing 101. For this reason, in this embodiment, the first guide 112, the cylindrical portion 81, the shaft insertion portion 1〇2, and the output shaft 73 have the following dimensional relationship.
[0100] [ 0 0 4 5 ]
[0101] When the cylindrical portion 81 of the motor unit 7〇's cover 8〇 is inserted into the first guide 112, the end 81a of the cylindrical portion 81 is inserted from the end 112a of the first guide 112 that is opposite to the bearing 1〇1 side. Also, when the output shaft 73 of the motor unit 70 is inserted into the shaft insertion portion 1〇2 of the bearing 1〇1, the tip 73a of the output shaft 73 is inserted from the end 102a of the shaft insertion portion 1〇2 that is on the recess 111 side. Therefore, in this embodiment, as shown in Figures 4 and 5, which are observed in a direction perpendicular to the direction in which the output shaft 73 of the motor unit 70 extends, the length L1 from the end 112a of the first guide 112 to the end 81a of the cylindrical portion 81 is longer than the length L2 from the end 1〇2a of the shaft insertion portion 102 to the tip 73a of the output shaft 73. By configuring lengths L1 and L2 in this way, at the moment the cylindrical portion 81 of the cover 8〇 of the motor unit 70 is inserted into the first guide 112, the tip 73a of the output shaft 73 of the motor unit 70 has not yet been inserted into the shaft insertion portion 102 of the bearing 101. Furthermore, the ends of the parts may be chamfered, either in a straight or curved cross-section. The lengths L1 and L2 mentioned above are the dimensions excluding such chamfered portions.
[0102] [ 0 0 4 6 ]
[0103] Here, preferably, bearing 1〇1 is a bush. When bearing 1〇1 is a bush, the output shaft 73 is inserted into shaft insertion portion 1〇2 such that a gap is formed between the inner circumferential surface of shaft insertion portion 102 and the output shaft 73 of motor unit 70. When bearing 1〇! is a rolling bearing, shaft insertion portion 1〇2 is provided on the inner ring. When bearing 1〇! is a rolling bearing, the output shaft 73 is inserted into shaft insertion portion 1〇2 such that no gap is formed between the inner circumferential surface of shaft insertion portion 1〇2 and the output shaft 73 of motor unit 7〇. Having a gap between the inner surface of the shaft insertion section 1 ○ 2 and the output shaft 7 3 of the motor unit 7 ○ makes it easier to insert the output shaft 7 3 into the shaft insertion section 1 ○ 2. In other words, having a gap between the inner surface of the shaft insertion section 1 ○ 2 and the output shaft 7 3 of the motor unit 7 ○ makes it easier to assemble the hydraulic control unit 1 0 0. For this reason, the bearing 1 0 1 is preferably a bush.
[0104] [ 0 0 4 7 ]
[0105] Furthermore, preferably, when bearing 1〇1 is a bush, as shown in Figures 4 and 5, where the observation direction is perpendicular to the direction in which the output shaft 73 of motor unit 7〇 extends, the clearance C1 between the first guide 112 and the cylindrical portion 81 of the cover 80 of motor unit 70 is smaller than the clearance C2 between the inner circumferential surface of the shaft insertion portion 1〇2 of bearing 1〇1 and the output shaft 73 of motor unit 7〇. By setting the dimensions of clearance C1 and clearance C2 in this relationship, the tip portion 73a of the output shaft 73 of motor unit 70 is more easily guided by the shaft insertion portion 1〇2 of bearing 1〇1. In other words, by setting the dimensions of clearance C1 and clearance C2 in this relationship, the assembly of the hydraulic control unit 100 becomes easier.
[0106] [ 0 0 4 8 ]
[0107] Furthermore, when clearance C1 is smaller than clearance C2, a gap 116 is preferably formed between the first guide 112 and the cylindrical portion 81 of the cover 80 of the motor unit 70. When a gap 116 is formed between the first guide 112 and the cylindrical portion 81, the load required to push the motor unit 70 to insert the cylindrical portion 81 into the first guide 112 can be reduced compared to when the first guide 112 and the cylindrical portion 81 are in contact. Therefore, a hydraulic control unit 100 in which a gap 116 is formed between the first guide 112 and the cylindrical portion 81 is easier to assemble compared to when the first guide 112 and the cylindrical portion 81 are in contact.
[0108] [ 0 0 4 9 ]
[0109] Preferably, as shown in Figure 5, the hydraulic control unit 1〇〇 is provided with a second guide 1〇3 at the end 101a of the bearing 1〇1 on the recess 111 side, which guides the tip 73a of the output shaft 3 of the motor unit 70 into the shaft insertion portion 1〇2 when the output shaft 3 of the bearing 1〇! is inserted into the shaft insertion portion 1〇2. The second guide 103 is, for example, a chamfered portion with a straight or curved cross-section. In a hydraulic control unit 100 equipped with a second guide 103, when inserting the output shaft 73 into the shaft insertion section 102, if the tip 73a of the output shaft 73 comes into contact with the end 10a of the bearing 101, the tip 73a of the output shaft 73 is guided into the shaft insertion section 102 by the second guide 103. Therefore, a hydraulic control unit 100 equipped with a second guide 103 is easier to assemble than a hydraulic control unit 100 without a second guide 103.
[0110] [ 0 0 5 0 ]
[0111] Manufacturing method for hydraulic control units >
[0112] Figure 6 is a flowchart illustrating a method for manufacturing a hydraulic control unit according to an embodiment of the present invention. Figure 7 is a partial cross-sectional view of the hydraulic control unit according to an embodiment of the present invention, viewed from the side, and is a partial cross-sectional view of the hydraulic control unit during assembly, viewed from the side. Figure 6 shows the step of inserting the output shaft 73 of the motor unit 70 into the shaft insertion portion 102 of the bearing 101, which is part of the manufacturing process of the hydraulic control unit 100. The output shaft 73 of the motor unit 70 is inserted into the shaft insertion portion 102 of the bearing 101 by steps S1 and S2.
[0113] [ 0 0 5 1 ]
[0114] Step S1 is the first insertion step. The first insertion step is the step of inserting the cylindrical portion 81 of the cover 80 of the motor unit 70 into the first guide 112. As shown in Figure 7, immediately after the cylindrical portion 81 of the cover 80 of the motor unit 70 is inserted into the first guide 112, the tip portion 73a of the output shaft 73 of the motor unit 70 has not yet been inserted into the shaft insertion portion 102 of the bearing 101.
[0115] [ 0 0 5 2 ]
[0116] Step S2 is a second insertion step performed after the first insertion step. The second insertion step is the step of inserting the output shaft 73 of the motor unit 7 into the shaft insertion portion 102 of the bearing 10!. After the first step, as the cylindrical portion 81 is further inserted into the first guide 112, the tip 73a of the output shaft 73 of the motor unit 7 is guided into the shaft insertion portion 102 of the bearing 101, and the output shaft 73 of the motor unit 7 is inserted into the shaft insertion portion 102 of the bearing 101.
[0117] [ 0 0 5 3 ]
[0118] <Variations>
[0119] Figure 8 is a diagram illustrating a modified example of a hydraulic control unit according to an embodiment of the present invention, and is a cross-sectional view showing the area around the bearing of the hydraulic control unit.
[0120] As shown in Figure 8, the hydraulic control unit 100 may be provided with a second guide 103 on the tip 73a of the output shaft 73 of the motor unit 70. Even if the second guide 103 is provided at that position, when the output shaft 73 is inserted into the shaft insertion section 102, if the tip 73a of the output shaft 73 comes into contact with the end 101a of the bearing 101, the tip 73a of the output shaft 73 will be guided into the shaft insertion section 102 by the second guide 103. Therefore, a hydraulic control unit 100 equipped with the second guide 103 in that position is easier to assemble than a hydraulic control unit b 100 not equipped with the second guide 103. In other words, the second guide 103 only needs to be provided on at least one of the ends 101a of the bearing 101 and the tip 73a of the output shaft 73 of the motor unit 70.
[0121] [ 0 0 5 4 ]
[0122] The effect of the hydraulic control unit >
[0123] The hydraulic control unit 100 according to this embodiment is a hydraulic control unit mounted on a saddle-type vehicle 200. The hydraulic control unit 100 comprises a base 110, a motor unit 70, and a bearing 101. The base 11〇 has an internal passage 4〇 through which brake fluid flows. The motor unit 70 is the drive source for a pump device 50 provided in the internal passage 40. The motor unit 70 has a stator 71, a rotor 72, an output shaft 73 fixed to the rotor 72, and a cover 8〇 provided on the outer circumference of the stator 71. The bearing 1〇1 is provided on the base 11〇. The bearing 1 has a shaft insertion portion 102 into which the output shaft 73 of the motor unit 7 is inserted. The cover 80 has a cylindrical portion 81 that covers the outer circumference of the stator 71. The base 110 has a recess 111 into which at least the end 81a of the cylindrical portion 81 on the side where the output shaft 73 protrudes is inserted. The bearing 101 and the recess 111 are aligned in the direction in which the output shaft 73 extends. The recess 111 has a first guide 112 on its inner circumference that guides the tip 3a of the output shaft 3 to the shaft insertion portion 102 of the bearing 101 when the cylindrical portion 81 is inserted.
[0124] [ 0 0 5 5 ]
[0125] In the hydraulic control unit 100 configured in this way, during assembly, the cylindrical portion 81 of the cover 8 of the motor unit 7〇 is inserted into the first guide 112 of the recess 111, thereby guiding the tip 73a of the output shaft 73 of the motor unit 70 to the shaft insertion portion 1〇2 of the bearing 1〇!. For this reason, the hydraulic control unit 100 configured in this way is easy to assemble even if the motor unit 7〇 drives the pump device 5〇 without a reduction gear.
[0126] [ 0 0 5 6 ]
[0127] Although the hydraulic control unit 100 has been described above in the embodiments, the hydraulic control unit according to the present invention is not limited to the embodiments described. For example, in this embodiment, the first guide 112 had a substantially cylindrical shape. However, it is not limited to this, and the first guide 112 may have a substantially frustoconical shape, for example, with a diameter that decreases towards the bearing 1〇1. Furthermore, the hydraulic control unit according to the present invention may implement only a part of the configuration described in the embodiments.
[0128] [Explanation of symbols]
[0129] [ 0 0 5 7 ]
[0130] ! Body, 2 Handle, 3 Front wheel, 3a Rotor, 4 Rear wheel, 4a Rotor, 1 0 Brake system, ! 1 Brake lever, 1 2 Hydraulic circuit, 1 3 Brake pedal, 1 5 Fluid pipe, 1 6 Fluid pipe, 2 1 Master cylinder, 2 2 Reservoir, 2 3 Brake caliper, 2 4 Wheel cylinder, 2 5 Fill valve, 2 6 Release valve, 2 7 Accumulator, 3 ○ Master cylinder hydraulic sensor, 3 1 Wheel cylinder hydraulic sensor, 4 ○ Internal flow path, 4 1 Main flow path, 4 1a Main flow path section, 4 2 Sub-flow path, 5 ○ Pump device, 5 1 Plunger, 6 ○ Control device, 6 1 Control board, 7 ○ Motor unit, 7 1 Stator, 7 2 rotor, 7 3 output shaft, 7 3 a tip, 7 4 eccentric part, 8 ○ cover, 8 1 cylindrical part, 8 1 a end, 8 2 flange, 1 0 0 hydraulic control unit, 1 0 1 bearing, 1 0 1 a end, 1 ○ 2 shaft insertion part, 1 0 2 a end, 1 0 3 second guide, 1 1 0 base body, 1 1 ○ a surface, 1 1 1 recess, 1 1 2 first guide, 1 1 2 a end, 1 1 3 flange recess, 1 1 3 a bottom, 1 1 4 plastic deformation part, 1 1 5 bearing recess, 1 1 6 gap, 1 2 ○ housing, 200 Saddle-type vehicle, C! clearance, C2 clearance, L1 length, L2 length, MP master cylinder port, WP wheel cylinder port.
Claims
[Document Name] Scope of Claim
1. A hydraulic control unit (100) mounted on a saddle-type vehicle (200), A base (110) having an internal passage (40) through which brake fluid flows, The motor unit (70) is the drive source for the pump device (50) provided in the internal flow path (40), and has a stator (71), a rotor (72), an output shaft (73) fixed to the rotor (72), and a cover (80) provided on the outer circumference of the stator (71), A bearing (101) provided on the base (110) and having a shaft insertion portion (102) into which the output shaft (73) is inserted, Equipped with, The cover (80) comprises a cylindrical portion (81) that covers the outer circumference of the stator (71), and the base (110) comprises a recess (111) into which at least the end (81a) of the cylindrical portion (81) on the side where the output shaft (73) protrudes is inserted. The bearing (101) and the recess (111) are aligned in the direction in which the output shaft (73) extends. The recess (111) is provided with a first guide (112) on its inner circumference that guides the tip (73a) of the output shaft (73) to the shaft insertion portion (102) when the cylindrical portion (81) is inserted. Hydraulic control unit (100).
2. The bearing (1 ○ 1) is a bush. A hydraulic control unit according to claim 1 (100).
3. In the observation direction perpendicular to the direction in which the output shaft (73) extends, The clearance (C1) between the first guide (112) and the cylindrical portion (81) is smaller than the clearance (C2) between the inner circumferential surface of the shaft insertion portion (102) and the output shaft (73). A hydraulic control unit (100) according to claim 2.
4. A gap (116) is formed between the first guide (112) and the cylindrical portion (81). A hydraulic control unit (100) according to claim 3.
5. At least one of the end portion (101a) of the bearing (101) on the recess (111) side and the tip portion (73a) of the output shaft (73) is provided with a second guide (103) that guides the tip portion (73a) of the output shaft (73) into the shaft insertion portion (102) when the output shaft (73) is inserted into the shaft insertion portion (102). A hydraulic control unit according to any one of claims 1 to 4 (100).
6. The cover (80) is provided with a flange (82) that protrudes from the outer circumferential surface of the cylindrical portion (81) outward from the cylindrical portion (81). The base body (110) comprises a flange recess (113) into which the flange (82) is inserted, and a plastically deformable portion (114) protruding from the inner circumference of the flange recess (113). The motor unit (70) is fixed to the base body (110) by the flange (82) being sandwiched between the bottom portion (113a) of the flange recess (113) and the plastically deformable portion (114). A hydraulic control unit according to any one of claims 1 to 4 (100).
7. In an observation direction perpendicular to the direction in which the output shaft (73) extends, the length (L1) from the end (112a) of the first guide (112) opposite to the bearing (101) side to the end (81a) of the cylindrical portion (81) on the side where the output shaft (73) protrudes is longer than the length (L2) from the end (102a) of the shaft insertion portion (102) on the recess (111) side to the tip (73a) of the output shaft (73). A hydraulic control unit according to any one of claims 1 to 4 (100).
8. A saddle-type vehicle (200) comprising a hydraulic control unit (100) according to any one of claims 1 to 4.
9. A method for manufacturing a hydraulic control unit (100) mounted on a saddle-type vehicle (200), wherein the hydraulic control unit (100) is A base (110) having an internal passage (40) through which brake fluid flows, The motor unit (70) is the drive source for the pump device (50) provided in the internal flow path (40), and has a stator (71), a rotor (72), an output shaft (73) fixed to the rotor (72), and a cover (80) provided on the outer circumference of the stator (71). A bearing (101) provided on the base (110) and having a shaft insertion portion (102) into which the output shaft (73) is inserted, Equipped with, The cover (80) comprises a cylindrical portion (81) that covers the outer circumference of the stator (71), and the base (110) comprises a recess (111) into which at least the end (81a) of the cylindrical portion (81) on the side where the output shaft (73) protrudes is inserted. The bearing (101) and the recess (111) are aligned in the direction in which the output shaft (73) extends. The recess (111) has a guide (112) on its inner circumference that guides the tip (73a) of the output shaft (73) to the shaft insertion portion (102) when the cylindrical portion (81) is inserted, and the manufacturing method is as follows: A first insertion step (S1) involves inserting the cylindrical portion (81) into the guide (112), and a second insertion step (S2) involves inserting the output shaft (73) into the shaft insertion portion (102) after the first insertion step. A method for manufacturing a hydraulic control unit (100) equipped with [a specific component].