WO2025126542A1 - ブレーキ用バルブ及び該ブレーキ用バルブを備えたバーハンドル車両用ブレーキ装置 - Google Patents

ブレーキ用バルブ及び該ブレーキ用バルブを備えたバーハンドル車両用ブレーキ装置 Download PDF

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Publication number
WO2025126542A1
WO2025126542A1 PCT/JP2024/024935 JP2024024935W WO2025126542A1 WO 2025126542 A1 WO2025126542 A1 WO 2025126542A1 JP 2024024935 W JP2024024935 W JP 2024024935W WO 2025126542 A1 WO2025126542 A1 WO 2025126542A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
brake
hydraulic
valve body
handle vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/024935
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English (en)
French (fr)
Japanese (ja)
Inventor
裕昭 渡邉
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Astemo Ltd
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Astemo Ltd
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Publication date
Application filed by Astemo Ltd filed Critical Astemo Ltd
Priority to JP2025563259A priority Critical patent/JPWO2025126542A1/ja
Publication of WO2025126542A1 publication Critical patent/WO2025126542A1/ja
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/224—Master control, e.g. master cylinders with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/28—Valves specially adapted therefor
    • B60T11/34—Pressure reducing or limiting valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L3/00—Brake-actuating mechanisms; Arrangements thereof

Definitions

  • the present invention relates to a brake valve and a brake device for a bar-handle vehicle equipped with the brake valve, and more specifically, to a brake valve provided in a hydraulic circuit connecting a brake and a hydraulic master cylinder that supplies hydraulic pressure to the brake, and a brake device for a bar-handle vehicle equipped with the brake valve.
  • a brake valve that adjusts the hydraulic pressure has been provided in the hydraulic circuit that connects the brake to the hydraulic master cylinder that supplies hydraulic pressure to the brake in order to set the release characteristics (feeling) when the brake is released.
  • This brake valve is sometimes installed, for example, inside a quick joint that is built into the union part of the caliper body, or on the rear side of it, and is installed by inserting the valve body from the master cylinder side of the hydraulic circuit without tilting it, and then screwing in a support base that supports the valve body from above (see, for example, Patent Document 1).
  • the present invention aims to provide a brake valve that can be easily attached and detached, and that can improve assembly, and a brake device for a bar-handle vehicle that is equipped with the brake valve.
  • the brake valve of the present invention is a brake valve provided in a hydraulic circuit connecting a hydraulic master cylinder and a brake, and comprises a cylinder with a valve body inside that is moved by hydraulic fluid, and a lid body attached to an opening at one end of the cylinder, a through hole through which the hydraulic fluid flows is formed in the lid body, a seating surface on which the valve body sits is formed in either the cylinder or the lid body, an adjustment communication passage is formed in at least one of the lid body and the valve body, when the valve body leaves the seating surface, the hydraulic fluid communicates with the hydraulic circuit through at least the main communication passage, and when the valve body sits on the seating surface, the hydraulic fluid communicates with the hydraulic circuit through the adjustment communication passage, and the adjustment communication passage has a smaller flow area than the main communication passage.
  • the brake device for a bar-handle vehicle of the present invention is also characterized in that it includes the brake valve, and the hydraulic master cylinder of the brake device for a bar-handle vehicle generates hydraulic pressure by operating an operating element, and the brakes are actuated by the hydraulic pressure.
  • the brake valve of the present invention allows the brake valve to be removed as a unit from the hydraulic master cylinder when replacing the brake valve components, and after replacing the components, the brake valve can be reassembled in an integrated state to the hydraulic master cylinder, improving ease of assembly.
  • FIG. 1 is an exploded perspective view of a brake valve showing a first embodiment of the present invention
  • FIG. 4 is a cross-sectional view of the brake valve mounted to the hydraulic master cylinder.
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG.
  • FIG. 4 is a cross-sectional view taken along line IV-IV of FIG.
  • FIG. 4 is a cross-sectional view showing a brake valve during braking.
  • FIG. 2 is a front view of a brake device for a bar-handle vehicle equipped with a brake valve.
  • FIG. 1 is a side view of a brake device for a bar-handle vehicle equipped with a brake valve.
  • FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 7.
  • FIG. 11 is a cross-sectional view showing a state in which a brake valve according to a second embodiment of the present invention is assembled to a hydraulic master cylinder.
  • FIG. 11 is a cross-sectional view showing a state in which a brake valve according to a third embodiment of the present invention is assembled to a hydraulic master cylinder.
  • FIG. 11 is a cross-sectional view showing a state in which a brake valve according to a fourth embodiment of the present invention is assembled to a hydraulic master cylinder.
  • FIGS. 1 to 8 show a first embodiment of the brake valve of the present invention, in which the brake valve 11 of this embodiment is attached to a brake device 1 for a bar-handle vehicle.
  • the brake device 1 for a bar-handle vehicle is equipped with a hydraulic master cylinder 2, an operating lever 3, and a push rod 3a.
  • the hydraulic master cylinder 2 is a well-known vertically-mounted master cylinder, and a cylinder hole (not shown) equipped with a piston (not shown) is formed in the vertically long cylinder body 2a.
  • the operating lever 3 is rotatably provided on the cylinder hole opening side of the cylinder body 2a, and by rotating the operating lever 3, the piston is pushed via the push rod 3a, and the hydraulic pressure generated by the pushing of the piston is supplied to the brake (not shown).
  • the side wall of the cylinder body 2a is provided with a first boss 5 (connection of the present invention) with a hydraulic circuit 4 connecting the brake and hydraulic master cylinder 2, a second boss 6 with a hydraulic fluid supply port, and a third boss 7 with a bleeder hole.
  • the first boss 5 has the hydraulic master cylinder side hydraulic circuit 4 on the back side (cylinder body side) and has a brake valve 11 attached to it.
  • a brake hose (not shown) that constitutes the brake side hydraulic circuit 4 (shown by a dashed line) is connected to the opening side of the first boss 5 via a banjo bolt (not shown).
  • the brake valve 11 is configured as an integrated unit comprising a cylindrical body 12, a valve body 13 housed inside the cylindrical body 12, a coil spring 14 that biases the valve body 13, and a lid body 15 attached to the cylindrical body 12.
  • the cylinder 12 is formed in a stepped bottomed cylinder shape with a large diameter cylinder section 12b having a bottom 12a and a small diameter cylinder section 12d having an opening 12c (an opening at one end of the present invention).
  • the large diameter cylinder section 12b has a tool engagement hole 12e (an opening at the other end of the present invention) with a hexagonal cross section at the center of the bottom 12a.
  • a through hole is formed that communicates with the opening 12c and the tool engagement hole 12e, and the through hole serves as a valve chamber 16 that communicates with the hydraulic circuit 4.
  • a male thread section 12f (a thread section of the present invention) that screws into a female thread section 5a formed on the inner surface of the first boss section 5 is formed on the outer periphery of the large diameter cylinder section 12b.
  • the small diameter cylinder section 12d has pin mounting holes 12g, 12g formed in the peripheral wall on the opening side to mount mounting pins 17, 17 for attaching the cover body 15.
  • the valve chamber 16 is formed on the central axis of the cylinder 12 and includes a small diameter valve chamber 16a that communicates with the tool engagement hole 12e, and a large diameter valve chamber 16b that communicates with the small diameter valve chamber 16a and the opening 12c.
  • a first step 16c is formed between the tool engagement hole 12e and the small diameter valve chamber 16a, and a second step 16d is formed between the small diameter valve chamber 16a and the large diameter valve chamber 16b.
  • the cover 15 is formed in a disk shape with approximately the same diameter as the small diameter cylindrical portion 12d.
  • Pin insertion holes 15a, 15a are formed at positions corresponding to the pin mounting holes 12g, 12g of the cover 15, and the cover 15 is attached to the opening 12c of the small diameter cylindrical portion 12d by attaching mounting pins 17, 17 across the pin mounting holes 12g, 12g and the pin insertion holes 15a, 15a.
  • a through hole 15b is formed in the center of the cover 15, which communicates with the large diameter valve chamber 16b and allows the hydraulic fluid to flow, and the inner surface of the cover 15 (the surface on the large diameter valve chamber side) becomes the seating surface 15c on which the valve body 13 described later sits.
  • a groove-shaped adjustment communication passage 18 is formed in the seating surface 15c, spanning the through hole 15b and the outer circumferential surface 15d.
  • the valve body 13 has a disk-shaped valve portion 13a that seats or unseats on the seating surface 15c, and a cylindrical extension portion 13b that extends from the valve portion 13a to the valve chamber 16 side.
  • the valve portion 13a is formed with a smaller diameter than the large-diameter valve chamber 16b and a larger diameter than the through hole 15b.
  • the extension portion 13b has a diameter and length that allows it to be inserted into the small-diameter valve chamber 16a, and a third step portion 13c is formed between the valve portion 13a and the extension portion 13b.
  • a cross-shaped groove portion 13d is also formed in the extension portion 13b.
  • a coil spring 14 is arranged on the outer periphery of the extension portion 13b. One end of the coil spring 14 abuts against the third step portion 13c and the other end abuts against the second step portion 16d, respectively, and urges the valve body 13 toward the seating surface 15c.
  • the brake valve 11 is assembled by placing the coil spring 14 on the outer periphery of the extension 13b of the valve body 13, and with one end of the coil spring 14 abutting against the third step 13c, inserting the extension 13b into the large-diameter valve chamber 16b through the opening 12c of the small-diameter cylindrical portion 12d, and inserting the tip side of the extension 13b into the small-diameter valve chamber 16a. As a result, the other end of the coil spring 14 abuts against the second step 16d.
  • the valve body 13 is pressed toward the tool engagement hole 12e, the cover body 15 is placed in the opening 12c of the small-diameter cylindrical portion 12d, and the mounting pins 17, 17 are attached across the pin mounting holes 12g, 12g and the pin insertion holes 15a, 15a, and the cover body 15 is attached to the opening 12c.
  • the brake valve 11 is assembled and configured as an integrated unit.
  • the brake valve 11 assembled in this manner is inserted into the first boss portion 5 of the hydraulic master cylinder 2 from the cover body 15 side, and by rotating it using a tool engaged in the tool engagement hole 12e, the male thread portion 12f of the large diameter cylindrical portion 12b screws into the female thread portion 5a of the first boss portion 5, and the brake valve 11 is attached to the first boss portion 5.
  • the valve portion 13a When the brake valve 11 is not braking, the valve portion 13a is seated on the seating surface 15c due to the elastic force of the coil spring 14.
  • the pressurized hydraulic fluid passes through the main communication passage 19 and the adjustment communication passage 18 formed as the area C between the tip surface 13e of the valve portion 13a and the seating surface 15c, and is introduced from the hydraulic master cylinder side hydraulic circuit 4 (left side of FIG. 5) through the through hole 15b into the large diameter valve chamber 16b, and causes the valve body 13 to unseat against the elastic force of the coil spring 14.
  • the pressurized hydraulic fluid is discharged from the tool engagement hole 12e through the valve chamber 16 to the brake side hydraulic circuit 4 (right side of FIG. 5) and is supplied to the brake through the brake hose.
  • the valve body 13 is restricted from moving toward the tool engagement hole 12e by the abutment of the extension portion 13b and the first step portion 16c.
  • the hydraulic fluid returns from the brake side to the hydraulic master cylinder 2 via the hydraulic circuit 4.
  • the valve body 13 of the brake valve 11 is seated on the seating surface 15c due to the elastic force of the coil spring 14.
  • the valve body 13 is in a closed state, but the hydraulic fluid is allowed to flow from the brake side hydraulic circuit 4 (right side in Figure 2) to the hydraulic master cylinder side hydraulic circuit 4 (left side in Figure 2) through the adjustment communication passage 18 as shown by arrow B, and the hydraulic fluid returns to the hydraulic master cylinder 2.
  • the flow area through which the hydraulic fluid flows in the adjustment communication passage 18 is smaller than the flow area through which the hydraulic fluid flows in the main communication passage 19.
  • the flow rate of hydraulic fluid flowing through the adjustment passage 18 is less than the flow rate of hydraulic fluid flowing through the main passage 19, so when braking is released, the hydraulic fluid slowly returns to the hydraulic master cylinder 2, and the release characteristics are set by the use of the hydraulic fluid returning to the hydraulic master cylinder 2 via the adjustment passage 18.
  • the brake valve 11 formed as described above can change the release characteristics when the brake is released by changing the number of adjustment communication passages 18 and the size of the groove.
  • a tool is engaged with the tool engagement hole 12e, the brake valve 11 is rotated to remove it from the first boss portion 5, and it is replaced with a cover body 15 equipped with adjustment communication passages 18 that provide the desired release characteristics.
  • the brake valve 11, which has been unitized by replacing the cover body 15, is inserted into the first boss portion 5 and assembled to the first boss portion 5 by rotating it via a tool engaged with the tool engagement hole 12e.
  • the brake valve 11 as a unit can be removed from the first boss portion 5, and components such as the cover can be replaced while ensuring a large working space, making it easy to replace components. Furthermore, because the brake valve 11 is unitized, the brake valve 11 can be attached and detached as a unit, improving the ease of assembly of the brake valve 11.
  • FIGS. 9 to 11 show another embodiment of the present invention, in which the same components as in the first embodiment are given the same reference numerals and detailed descriptions thereof are omitted.
  • Figure 9 shows a second embodiment of the present invention, in which a brake valve 31 has a groove-shaped adjustment communication passage 31b formed in the valve portion 31a of the valve body 13.
  • the adjustment communication passage 31b is formed in the tip face 31c that faces the seating surface 15c, and is formed in a straight line from the center of the tip face 31c to the outer circumferential surface.
  • the release characteristics can be changed by changing the number of adjustment communication passages 31b formed in the valve portion 31a and the size of the grooves.
  • the brake valve 31 is removed from the first boss portion 5, the valve body 13 is replaced with a valve body having an adjustment communication passage that provides the desired release characteristics, and then it is reassembled to the first boss portion 5.
  • Figure 10 shows a third embodiment of the present invention, in which the brake valve 32 has an adjustment passage 32b provided in the valve portion 32a of the valve body 13, and the adjustment passage 32b is formed as a through hole extending from the center of the tip surface 32c facing the seating surface 15c to the groove portion 13d.
  • the release characteristics can be changed by changing the diameter of the adjustment passage 32b formed in the valve portion 32a.
  • the brake valve 32 is removed from the first boss portion 5, the valve body 13 is replaced with a valve body having an adjustment passage that provides the desired release characteristics, and then it is reassembled to the first boss portion 5.
  • Fig. 11 shows a fourth embodiment of the present invention, in which a brake valve 33 is formed by attaching a lid 35 to an opening 34a at one end of a bottomed cylindrical body 34 via mounting pins 36, 36, and a valve chamber 37 is formed between the inside of the body 34 and the inside of the lid 35.
  • the valve chamber 37 is formed with a large diameter valve chamber 37a inside the body and a small diameter valve chamber 37b inside the lid 35, and a fourth step 37c is formed between the large diameter valve chamber 37a and the small diameter valve chamber 37b.
  • the valve body 13 has the same structure as the third embodiment, and like components are designated by like reference numerals, with detailed description thereof being omitted.
  • the opening 34c (the opening at the other end of the present invention) at the center of the bottom 34b of the cylinder 34 connects the large diameter valve chamber 37a to the hydraulic circuit 4 on the hydraulic master cylinder side, and the periphery of the opening 34c on the inner surface (the surface on the large diameter valve chamber side) of the bottom 34b forms a seating surface 34d on which the valve body 13 sits.
  • the cover 35 is provided with a tool engagement hole 35a that connects the small diameter valve chamber 37b to the brake side hydraulic circuit 4.
  • the valve body 13 is arranged with the valve portion 32a facing the seating surface 34d, and one end of the coil spring 14 abuts against the third step 13c and the other end against the fourth step 37c.
  • the brake valve 33 is inserted into the first boss 5 from the cylinder 34 side, and is assembled to the first boss 5 by engaging a tool with the tool engagement hole 35a formed in the cover 35 and rotating the cylinder 34 together with the cover 35.
  • the brake valve of the present invention is not limited to being attached to a hydraulic master cylinder used in a bar-handle vehicle as in the above-mentioned embodiments, but may be provided anywhere in the hydraulic circuit connecting the brake and the hydraulic master cylinder, and may also be provided in a hydraulic circuit formed in the caliper body. Also, in the above-mentioned embodiments, the adjustment communication passage is provided in either the cover or the valve body, but it may be provided in both the cover and the valve body.
  • 1... Brake device for bar-handle vehicle 2... Hydraulic master cylinder, 2a... Cylinder body, 3... Operating lever, 3a... Push rod, 4... Hydraulic circuit, 5... First boss portion, 6... Second boss portion, 7... Third boss portion, 11... Brake valve, 12... Cylinder body, 12a... Bottom portion, 12b... Large diameter cylindrical portion, 12c... Opening, 12d... Small diameter cylindrical portion, 12e... Tool engagement hole, 12f... Male thread portion, 12g... Pin mounting hole, 13... Valve body, 13a... Valve portion, 13b... Extension portion, 13c... Third step portion, 13d... Groove portion, 13e... Tip surface, 14... Coil spring, 15... Cover body, 15a... Pin insertion hole, 15b...

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
PCT/JP2024/024935 2023-12-14 2024-07-10 ブレーキ用バルブ及び該ブレーキ用バルブを備えたバーハンドル車両用ブレーキ装置 Pending WO2025126542A1 (ja)

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JP2025563259A JPWO2025126542A1 (https=) 2023-12-14 2024-07-10

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JP2023-210711 2023-12-14
JP2023210711 2023-12-14

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WO2025126542A1 true WO2025126542A1 (ja) 2025-06-19

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WO (1) WO2025126542A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58143761U (ja) * 1982-03-24 1983-09-28 株式会社ナブコ マスタシリンダ用弁装置
JPS60110556A (ja) * 1983-11-22 1985-06-17 Akebono Brake Ind Co Ltd ブレ−キ液圧保持装置
JPH05116621A (ja) * 1991-10-02 1993-05-14 Nissan Motor Co Ltd 油圧ブレーキ装置
EP3592619B1 (en) * 2017-03-10 2021-01-20 Freni Brembo S.p.A. Braking system valve assembly and brake caliper body with said assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58143761U (ja) * 1982-03-24 1983-09-28 株式会社ナブコ マスタシリンダ用弁装置
JPS60110556A (ja) * 1983-11-22 1985-06-17 Akebono Brake Ind Co Ltd ブレ−キ液圧保持装置
JPH05116621A (ja) * 1991-10-02 1993-05-14 Nissan Motor Co Ltd 油圧ブレーキ装置
EP3592619B1 (en) * 2017-03-10 2021-01-20 Freni Brembo S.p.A. Braking system valve assembly and brake caliper body with said assembly

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