JP2009143389A - Interlocking brake mechanism for bar-handle vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interlocking brake mechanism regulating advance amount of a piston of an interlocking slave cylinder to accurately operate a rear wheel brake with a good feeling when pressure rise on a front wheel brake side is not achieved as preset. <P>SOLUTION: The interlocking brake mechanism for a bar-handle vehicle is provided with a piston stopper 10 which comes into contact with a large-diameter flange part 28b provided on the piston 28 of the interlocking slave cylinder 8 and regulates the advance amount of the piston 28. The piston stopper 10 includes a cylinder part 10b, a stopper lever 33, a stopper resilient member 39, a hydraulic pressure introduction passage 34, and a hydraulic pressure chamber 38. While a predetermined hydraulic pressure does not act to the hydraulic pressure chamber 38, a front end of the stopper lever 33 is projected to a contacting position at more distance from an interlocking member than the large-diameter flange part 28b to come into contact with the piston 28 in such a state that the piston 28 is slightly advanced. In a state where the predetermined hydraulic pressure acts to the hydraulic pressure chamber 38, the stopper lever 33 retreats by the hydraulic pressure so that the front end of the stopper lever 33 moves to a cylinder hole outer periphery side of the interlocking slave cylinder 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an interlocking brake mechanism for a bar handle vehicle including an interlocking slave cylinder and a front wheel hydraulic pressure master cylinder used in a hydraulic system for interlocking brakes.

In recent years, as an interlocking brake mechanism for a bar handle vehicle, a first hydraulic system that supplies hydraulic pressure to a front wheel brake via a front wheel hydraulic master cylinder according to an operation of a front wheel brake lever, and a rear wheel brake operator The hydraulic pressure is supplied to the rear wheel brake via the rear wheel hydraulic master cylinder according to the operation of the front wheel, and the front wheel is connected via the interlocking slave cylinder which operates hydraulically according to the operation of the rear wheel brake operator. There has been proposed a system including a second hydraulic system that operates a hydraulic master cylinder and supplies hydraulic pressure to a front wheel brake. The front-wheel hydraulic master cylinder and the interlocking slave cylinder are arranged in parallel, and arc-shaped interlocking with both ends abutting on the piston outer end surface of the front-wheel hydraulic master cylinder and the piston outer end surface of the interlocking slave cylinder. When the middle part of the member is pivotally connected to the front wheel brake lever and the front wheel brake lever is operated by the first hydraulic system to operate the front wheel brake, the front wheel brake lever is operated along with the operation of the front wheel brake lever. The interlocking member rotates to push the piston of the front wheel hydraulic master cylinder to operate the front wheel hydraulic master cylinder and operate the rear wheel brake operator to operate the front wheel brake by the second hydraulic system. When the interlocking slave cylinder is hydraulically operated, the interlocking member holds the front wheel brake lever in a non-operating state. Moving to and so as to boost the front-wheel hydraulic master cylinder to push the piston of the front-wheel hydraulic master cylinder (e.g., see Patent Document 1.).
JP-A-9-254771

  However, in the above-mentioned interlocking brake mechanism, since the hydraulic pressure is supplied to both the rear wheel brake and the front wheel brake by the brake operation of the rear wheel, a load is applied in the direction of returning the brake due to an impact applied to the wheel, for example. In some cases, such as when the front wheel brake side pressure increase cannot be obtained as set due to the change in the rollback amount of the front wheel brake, the brake pressure increase characteristic of the rear wheel brake side changes. There was a risk of deterioration.

  Therefore, the present invention has a simple structure, and when the pressure increase on the front wheel brake side cannot be obtained as set, the advance amount of the piston of the interlocking slave cylinder is regulated, and the rear wheel brake is accurately controlled with a good feeling. An object of the present invention is to provide a bar handle vehicle interlocking brake mechanism that can be operated.

  In order to achieve the above object, the interlock brake mechanism for a bar handle vehicle of the present invention applies hydraulic pressure from the rear wheel hydraulic master cylinder to the rear wheel brake and the interlock slave cylinder according to the operation of the rear wheel brake operator. An interlocking mechanism for supplying hydraulic pressure from the front wheel hydraulic master cylinder to the front wheel brake by supplying the movement of the piston of the interlocking slave cylinder to the piston of the front wheel hydraulic master cylinder via the interlocking member. In the bar handle vehicle interlocking brake mechanism provided, the interlocking slave cylinder is provided with a piston stopper that abuts against the piston of the interlocking slave cylinder and regulates the forward movement amount of the piston, and the piston stopper is used for the front wheel Cylinder with a hydraulic chamber supplied with hydraulic pressure from a hydraulic master cylinder, and slidably inserted into the cylinder And a stopper resilient member for urging the stopper toward the interlocking slave cylinder. When a predetermined hydraulic pressure is applied to the hydraulic pressure chamber, the stopper is caused by the hydraulic pressure. When the rod moves to a non-contact position with the piston of the interlocking slave cylinder and a predetermined hydraulic pressure does not act on the hydraulic chamber, the stopper resilient member causes the stopper rod to move the interlock slave. The cylinder is biased to a position of contact with the piston, and abuts against the piston to regulate the advance amount of the piston. The piston of the interlocking slave cylinder is formed with a large-diameter flange portion, and the liquid In a state where a predetermined hydraulic pressure does not act on the pressure chamber, the stopper rod protrudes toward the interlocking member side of the large-diameter flange portion to restrict the advance amount of the piston, and the large-diameter flange portion The counter-coupling member side of the peripheral surface, the slope gradually decreases in diameter toward the counter-coupling member side is formed, the distal end surface of the stopper rod, the anti interlocking member side may also be formed inclined surface protruding.

  According to the bar handle vehicle interlocking brake mechanism of the present invention, when the rear wheel brake operator is operated, the hydraulic pressure is supplied to the rear wheel brake and the hydraulic pressure is supplied to the interlocking slave cylinder. The piston of the slave cylinder moves forward. As the piston advances, the interlocking member rotates to generate hydraulic pressure in the front wheel hydraulic master cylinder, and this hydraulic pressure is supplied to the hydraulic chamber of the piston stopper together with the front wheel brake. The hydraulic pressure supplied to the hydraulic pressure chamber becomes a predetermined hydraulic pressure, that is, a hydraulic pressure capable of separating the stopper rod from the piston of the interlocking slave cylinder against the elastic force of the stopper elastic member. As a result, the stopper rod moves to the non-contact position with the piston of the interlocking slave cylinder, so that the hydraulic pressure is supplied to the rear wheel brake in accordance with the operation of the rear wheel brake operator, and the front wheel hydraulic pressure master. The cylinder can be operated to supply hydraulic pressure to the front wheel brake, and a suitable braking force for the rear wheel brake and the front wheel brake can be ensured.

  On the other hand, when operating the brake operator for the rear wheel, if the load is applied in the direction of returning the brake due to the impact applied to the wheel, etc., or the pressure on the front wheel brake side is increased as set by the change in the rollback amount of the front wheel brake, etc. In this case, since the predetermined hydraulic pressure is not supplied to the hydraulic chamber of the piston stopper, the stopper rod is attached to the contact position with the piston of the interlocking slave cylinder by the biasing force of the stopper elastic member. As a result, the piston of the interlocking slave cylinder and the stopper rod come into contact with each other, and the advance amount of the piston is restricted. As a result, the hydraulic pressure applied to the front wheel brake by the operation of the rear wheel brake operator is maintained at a constant hydraulic pressure, ensuring a suitable braking force for the rear wheel brake and maintaining a good brake feeling. it can.

  Furthermore, a large-diameter flange portion is formed on the piston, and an inclined surface having a gradually decreasing diameter toward the anti-interlocking member side is formed on the anti-interlocking member side of the large-diameter flange portion. Even if the large-diameter flange part is arranged on the interlocking member side of the stopper rod for some reason, the large-diameter flange part is released when braking is released. The inclined surface of the stopper rod moves along the inclined surface to get over the large diameter flange portion, and the large diameter flange portion and the stopper rod can be satisfactorily returned to the initial positions.

  1 and 2 are views showing an embodiment of the interlock brake mechanism for a bar handle vehicle according to the present invention. FIG. 1 is a cross-sectional front view of an essential part of the interlock brake mechanism, and FIG. 2 is an explanatory view of the interlock brake mechanism. .

  As shown in FIG. 2, the interlock brake mechanism 1 for the bar handle vehicle according to the present embodiment applies hydraulic pressure to the front wheel brake 4 a via the front wheel hydraulic master cylinder 3 in accordance with the operation of the front wheel brake lever 2. The hydraulic pressure is supplied to the rear wheel brake 4b via the rear wheel hydraulic master cylinder 7 according to the operation of the first hydraulic pressure system 5 to be supplied and the rear wheel brake pedal 6 serving as the rear wheel brake operator. At the same time, a second hydraulic system that supplies hydraulic pressure to the front wheel brake 4a by operating the front wheel hydraulic master cylinder 3 via the interlocking slave cylinder 8 that operates hydraulically in response to the operation of the rear wheel brake pedal 6. 9 and a third hydraulic system 11 for branching the hydraulic pressure generated in the front wheel hydraulic master cylinder 3 from the first hydraulic system 5 and supplying it to the piston stopper 10 provided in the interlocking slave cylinder 8; Has

  The front wheel hydraulic pressure master cylinder 3 and the interlocking slave cylinder 8 are provided on the cylinder base 14 that is attached in the vicinity of the accelerator grip 13 of the handle bar 12 that steers the front wheel at the front of the body of the bar handle vehicle. The pressure master cylinder 3 and the interlocking slave cylinder 8 are provided so that the axes thereof are parallel to each other, and a piston stopper 10 is connected to the interlocking slave cylinder 8.

  A pair of upper and lower lever brackets 14a are provided on one side of the cylinder base 14 on the side of the vehicle body so as to project at an intermediate position between the front wheel hydraulic master cylinder 3 and the interlocking slave cylinder 8 on the cylinder hole opening side. Further, the front wheel brake lever 2 and the interlocking member 15 swing using a collar 16 and a pivot 17 disposed at an intermediate position between the axis of the front wheel hydraulic master cylinder 3 and the axis of the interlocking slave cylinder 8. It is provided as possible. A reservoir tank 18 that stores hydraulic fluid is provided above the front-wheel hydraulic master cylinder 3, and a bleeder 19 is provided above the interlocking slave cylinder 8.

  The front wheel hydraulic master cylinder 3 is disposed at a position near the handlebar 12 of the cylinder base 14. The first cylinder hole 3a used for the front wheel hydraulic master cylinder 3 opens toward the outer side of the cylinder base 14 in the vehicle body. A large-diameter portion 3b is formed on the opening side, and the bottom 3c of the first cylinder hole 3a. A hydraulic fluid supply port 3d for supplying hydraulic fluid to the front wheel brake 4a and the piston stopper 10 is formed. A first piston 21 is inserted into the first cylinder hole 3a via two cup seals 20 and 20, and a hydraulic chamber 22 is formed between the first piston 21 and the bottom 3c of the first cylinder hole 3a. In addition, the reservoir tank 18 communicates with the first cylinder hole 3a via a port (not shown). Further, the first piston 21 is always urged toward the opening side by a first return spring 23 contracted between the flange portion 21a formed on the inner end side of the first piston 21 and the bottom portion 3c, and moves backward. The limit is regulated by a circlip 24 provided in the large diameter portion 3b of the first cylinder hole 3a. Further, the first piston 21 is in a state in which the outer end portion 21b protrudes from the first cylinder hole 3a when not in operation, and the dust boot is provided between the outer end portion 21b and the opening side of the large diameter portion 3b. 25 is installed.

  The interlocking slave cylinder 8 is disposed at a position far from the handle bar 12 of the cylinder base 14. The second cylinder hole 8a used in the interlocking slave cylinder 8 opens toward the outer side of the cylinder base 14 in the vehicle body. And a medium-diameter cylinder portion 8d that connects the small-diameter cylinder portion 8c. Further, a hydraulic fluid inlet 8f to which hydraulic pressure is supplied in accordance with the operation of the rear wheel brake pedal 6 is formed in the bottom portion 8e of the second cylinder hole 8a so as to communicate with the small diameter cylinder portion 8c. The bleeder 19 communicates with the introduction port 8f.

  A second piston 28 is inserted into the second cylinder hole 8a via a cup seal 26 and a seal member 27. The second piston 28 includes a large-diameter shaft portion 28a inserted into the small-diameter cylinder portion 8c, A large-diameter flange portion 28b formed at an intermediate portion of the large-diameter shaft portion 28a, and a small-diameter shaft portion 28c continuous with the distal end portion of the large-diameter shaft portion 28a are provided. Further, an inclined surface 28d that gradually becomes smaller in diameter toward the anti-interlocking member side is formed on the anti-interlocking member side of the outer peripheral surface of the large-diameter flange portion 28b. The second piston 28 is inserted into the second cylinder hole 8a, and the retaining member 29 is mounted on the opening side of the large-diameter cylinder portion 8b, whereby the retaining member 29, the large-diameter cylinder portion 8b, and the medium-diameter cylinder portion. The air chamber 30 is defined by 8d, and a second return spring 31 that constantly biases the second piston 28 toward the bottom of the cylinder hole is provided between the retaining member 29 and the large-diameter flange portion 28b. The Further, the step formed between the large-diameter shaft portion 28a and the small-diameter shaft portion 28c abuts against the retaining member 29, thereby restricting the stroke of the second piston 28 and preventing the second piston 28 from coming off. It is done. Further, the second piston 28 has an outer end portion 28e protruding from the second cylinder hole 8a, and a dust seal 32 that is in sliding contact with the small diameter shaft portion 28c is attached to the retaining member 29.

  The piston stopper 10 is formed integrally with the interlocking slave cylinder 8 at a position where the housing 10 a is far from the handle bar 12 of the cylinder base 14. The piston stopper 10 is formed with a cylinder portion 10b in a direction perpendicular to the axis of the interlocking slave cylinder 8, and the cylinder portion 10b is formed in a small-diameter guide hole 10c that opens to the medium-diameter cylinder portion 8d of the interlocking slave cylinder 8. Continuously, the medium diameter portion 10d and the large diameter portion 10e are successively arranged, and the end portion of the large diameter portion 10e is closed by the lid member 10f. In addition, a fluid pressure introduction path 34 through which fluid pressure is supplied in response to the operation of the front wheel fluid pressure master cylinder 3 is opened in the middle diameter portion 10d.

  The stopper rod 33 is provided with a large-diameter shaft portion 33c between the lid member-side small-diameter shaft portion 33a and the slave cylinder-side small-diameter shaft portion 33b, and the center of the distal end surface of the slave cylinder-side small-diameter shaft portion 33b is conical. An inclined surface 33d is formed so as to protrude from the surface. In the stopper rod 33, the large-diameter shaft portion 33c is inserted into the large-diameter portion 10e of the cylinder portion 10b via the first O-ring 35, and the slave cylinder-side small-diameter shaft portion 33b is inserted into the guide hole 10c via the second O-ring 36. As a result, an air chamber 37 is provided between the lid member side surface of the large diameter shaft portion 33c and the lid member 10f, and between the slave cylinder side surface of the large diameter shaft portion 33c and the tip surface 10g of the medium diameter portion 10d. Each of the hydraulic chambers 38 is defined. Further, between the lid member 10f and the large-diameter shaft portion 33c, a stopper resilient member 39 that constantly biases the stopper rod 33 toward the interlocking slave cylinder is provided. The stopper rod 33 is a step in which the large-diameter shaft portion 33c is formed between the large-diameter portion 10e and the medium-diameter portion 10d of the cylinder portion 10b in a state where a predetermined hydraulic pressure is not applied to the hydraulic chamber 38. The movement of the slave cylinder side small-diameter shaft portion 33b protrudes into the middle-diameter cylinder portion 8d of the interlocking slave cylinder 8, and the protruding position of the tip portion is determined by the second piston. The large-diameter flange portion 28b 28 is disposed at a position spaced a predetermined distance from the interlocking member 15 side.

  The front-wheel brake lever 2 is formed in a rod-like body that gently curves substantially along the front of the accelerator grip 13, and is continuously connected to the operation portion 2a operated by the rider and the base side of the operation portion 2a. An interlocking member pressing arm 2b that presses and rotates the member 15 and a shaft mounting portion 2c that is supported by the lever bracket 14a of the cylinder base 14 are integrally formed.

  The interlocking member 15 is an intermediate shaft mounting portion 15a supported by the lever bracket 14a of the cylinder base 14, and extends rearward from the shaft mounting portion 15a to the outer end portion 21b of the first piston 21. An arcuate first working arm 15b that abuts, an arcuate second working arm 15c that extends forward from the axle 15a and contacts the outer end 28e of the second piston 28, and the front wheel A contact arm 15d facing the interlocking member pressing arm 2b formed on the brake lever 2, and a rotation restricting piece 15e that contacts the lever side surface 14b of the cylinder base 14 and restricts the rotation of the interlocking member 15. The shaft mounting portion 15a is integrally formed with an insertion hole 15f for the pivot 17 and the collar 16. A spring member 40 that biases the front wheel brake lever 2 to the non-operation position is provided between the contact arm 15d and the interlocking member pressing arm 2b.

  The interlocking brake mechanism 1 formed as described above includes the first return spring 23 of the front wheel hydraulic master cylinder 3 and the interlocking slave cylinder when the front wheel brake lever 2 and the rear wheel brake pedal 6 are inactive. 8 and the second return spring 31 and the elastic force of the spring member 40, the front wheel brake lever 2 and the interlocking member 15 are in a state in which the rotation restriction piece 15e abuts the lever side surface 14b and the rotation is restricted. It has become. Further, the piston stopper 10 is interlocked with the inclined surface 33d formed at the tip of the stopper rod 33 by the elastic force of the stopper elastic member 39 and the distal end side of the slave cylinder side small-diameter shaft portion 33b continuous with the inclined surface 33d. The slave cylinder 8 protrudes into the medium diameter cylinder portion 8d and is disposed at a position spaced a predetermined distance from the large diameter flange portion 28b of the second piston 28 on the interlocking member 15 side.

  When the front wheel brake lever 2 is turned, the interlocking member pressing arm 2b of the front wheel brake lever 2 pushes the contact arm 15d of the interlocking member 15, and the front wheel brake lever 2 and the interlocking member 15 rotate the pivot 17. The first working arm 15b of the interlocking member 15 pushes the first piston 21 toward the bottom of the cylinder hole against the elastic force of the first return spring 23. . Along with this, hydraulic pressure is generated in the hydraulic pressure chamber 22, and hydraulic pressure is supplied from the hydraulic fluid supply port 3d to the front wheel brake 4a via the first hydraulic pressure system 5 to operate the front wheel brake 4a. At the same time, a predetermined hydraulic pressure is supplied from the hydraulic fluid supply port 3d to the hydraulic pressure chamber 38 of the piston stopper 10 via the third hydraulic pressure system 11, and the stopper rod 33 moves to the lid member 10f side. The distal end portion of 33 is drawn into the outer peripheral side of the cylinder hole of the interlocking slave cylinder 8 which is in a non-contact position with the second piston 28, and the second piston 28 becomes movable.

  Further, when the rear wheel brake pedal 6 is operated, a hydraulic pressure is generated in a hydraulic chamber (not shown) of the rear wheel hydraulic master cylinder 7, and the rear wheel brake 4 b is connected via the second hydraulic system 9. The hydraulic pressure generated in the hydraulic chamber 22 of the rear wheel hydraulic master cylinder 7 is simultaneously supplied to the slave for interlocking via the second hydraulic system 9. The hydraulic fluid is introduced into the second cylinder hole 8a from the hydraulic fluid inlet 8f of the cylinder 8 and presses the second piston 28 against the elastic force of the second return spring 31 toward the cylinder hole opening side. In a state before the large-diameter flange portion 28b slightly moves toward the interlocking member 15 and abuts against the distal end side of the stopper rod 33, the outer end portion 28e of the second piston 28 slightly protrudes from the cylinder hole opening portion, The second working arm 15 c of the interlocking member 15 is pressed to rotate the interlocking member 15 about the pivot 17. When the spring member 40 extends, the interlocking member 15 rotates independently while the front wheel brake lever 2 is held in a non-operating state, and the first working arm 15b causes the first piston 21 to move into the first cylinder hole 3a. Pushing to the bottom 3c side, a predetermined hydraulic pressure is supplied from the hydraulic fluid supply port 3d to the hydraulic chamber 38 of the piston stopper 10 via the first hydraulic system 5 and the third hydraulic system 11. Accordingly, as described above, the tip end portion of the stopper rod 33 is drawn into the non-contact position on the outer peripheral side of the cylinder hole of the interlocking slave cylinder 8, and the second piston 28 can move forward.

  When the rear wheel brake pedal 6 is further operated and the hydraulic pressure is further supplied to the rear wheel brake 4b via the second hydraulic pressure system 9, the second piston 28 has the large-diameter flange portion 28b not applied. Passing through the distal end side of the stopper rod 33 drawn into the contact position, the second cylinder hole 8a is advanced, and the first piston 21 is further pushed into the bottom side of the first cylinder hole 3a via the interlocking member 15, A predetermined hydraulic pressure is generated in the pressure chamber 22, and the hydraulic pressure is supplied from the hydraulic fluid supply port 3d to the front wheel brake 4a via the first hydraulic pressure system 5, so that the front wheel brake 4a can be operated reliably.

  On the other hand, when the rear wheel brake pedal 6 is operated, a load is applied in the direction of returning the brake due to an impact applied to the wheels, or the pressure increase on the front wheel brake side is set by a change in the rollback amount of the front wheel brake 4a, etc. If the first hydraulic system 5 fails, the predetermined hydraulic pressure is not supplied to the hydraulic chamber 38 of the piston stopper 10 even if the second piston 28 moves forward. The stopper rod 33 does not move toward the lid member 10 f, and the tip end side of the stopper rod 33 comes into contact with the large-diameter flange portion 28 b of the second piston 28 to restrict the advance amount of the second piston 28. Thereby, although the hydraulic pressure supply to the front wheel brake 4a by the operation of the brake pedal 6 for the rear wheel is stopped, a suitable braking force of the rear wheel brake 4b can be secured and a good brake feeling can be maintained. it can.

  Furthermore, even if the large-diameter flange portion 28b is positioned on the interlocking member side of the stopper rod 33 for some reason during braking, the brake 28 is released along the inclined surface 28d formed on the outer peripheral surface of the large-diameter flange portion 28b. The inclined surface 33d formed at the tip of the stopper rod 33 moves, gets over the large diameter flange portion 28b, and can satisfactorily return the large diameter flange portion 28b and the stopper rod 33 to the initial positions.

  The present invention is not limited to providing the front wheel hydraulic master cylinder and the interlocking slave cylinder on one base as in the above-described embodiment, and the front wheel hydraulic master cylinder and the interlocking slave cylinder are provided respectively. It can also be applied to those formed and connected to the substrate. Moreover, the formation position of the piston stopper is not limited to the position where the piston stopper is formed at a position far from the handle bar of the cylinder base, and can be provided at an arbitrary position continuing to the interlocking slave cylinder. Furthermore, the distal end surface of the stopper rod or the outer surface opposite to the interlocking member side of the large-diameter flange portion may be formed in a spherical shape, or the inclined surface may be formed by chamfering the outer periphery of the distal end of the stopper rod. The rear wheel brake operator may be a brake lever, and the present invention can also be applied to a vertical brake device in which a cylinder base is disposed so that the axis of the cylinder hole is perpendicular to the axis of the handlebar.

It is a principal section sectional front view of the interlocking brake mechanism which shows one example of the present invention. It is explanatory drawing of an interlocking brake mechanism similarly.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Interlocking brake mechanism, 2 ... Front wheel brake lever, 2a ... Operation part, 2b ... Interlocking member pressing arm, 2c ... Shaft attaching part, 3 ... Front wheel hydraulic master cylinder, 3a ... 1st cylinder hole, 3b ... Large Diameter, 3c ... Bottom, 3d ... Hydraulic fluid supply port, 4a ... Front wheel brake, 4b ... Rear wheel brake, 5 ... First hydraulic system, 6 ... Rear wheel brake pedal, 7 ... Rear wheel hydraulic master cylinder , 8 ... slave cylinder for interlocking, 8a ... second cylinder hole, 8b ... large diameter cylinder part, 8c ... small diameter cylinder part, 8d ... medium diameter cylinder part, 8e ... bottom part, 8f ... hydraulic fluid inlet, 9 ... second Hydraulic system, 10 ... piston stopper, 10a ... housing, 10b ... cylinder part, 10c ... guide hole, 10d ... medium diameter part, 10e ... large diameter part, 10f ... lid member, 10g ... tip surface, 11 ... third liquid Pressure system, 12 ... handlebar, 13 Accelerator grip, 14 ... Cylinder base, 14a ... Lever bracket, 14b ... Lever side, 15 ... Interlocking member, 15a ... Attached part, 15b ... First working arm, 15c ... Second working arm, 15d ... Contact arm, 15e Rotation restricting piece, 15f ... insertion hole, 16 ... collar, 17 ... pivot, 18 ... reservoir tank, 19 ... bleeder, 20 ... cup seal, 21 ... first piston, 21a ... flange portion, 21b ... outer end portion, DESCRIPTION OF SYMBOLS 22 ... Hydraulic pressure chamber, 23 ... 1st return spring, 24 ... Circlip, 25 ... Dust boot, 26 ... Cup seal, 27 ... Seal member, 28 ... 2nd piston, 28a ... Large diameter shaft part, 28b ... Large diameter Flange part, 28c ... small diameter shaft part, 28d ... slope, 28e ... outer end part, 29 ... retaining member, 30 ... air chamber, 31 ... second return spring, 32 ... dust seal, 3 ... Stopper rod 33a ... Small diameter shaft portion on the lid member side, 33b ... Small diameter shaft portion on the slave cylinder side, 33c ... Large diameter shaft portion, 33d ... Slope, 34 ... Hydraulic pressure introduction path, 35 ... 1st O-ring, 36 ... 1st 2O ring, 37 ... air chamber, 38 ... hydraulic chamber, 39 ... stopper elastic member, 40 ... spring member

Claims (2)

In response to the operation of the rear wheel brake operator, hydraulic pressure is supplied from the rear wheel hydraulic master cylinder to the rear wheel brake and the interlocking slave cylinder, and the movement of the piston of the interlocking slave cylinder is transferred to the front wheel via the interlocking member. In a bar handle vehicle interlocking brake mechanism having an interlocking mechanism that supplies hydraulic pressure from the front wheel hydraulic pressure master cylinder to the front wheel brake by transmitting to the piston of the hydraulic pressure master cylinder, the interlocking slave cylinder includes the interlocking slave cylinder. A piston stopper is provided in contact with the piston of the interlocking slave cylinder to regulate the advance amount of the piston, and the piston stopper includes a hydraulic chamber to which hydraulic pressure is supplied from the hydraulic master cylinder for the front wheels. And a stopper 杆 slidably inserted into the cylinder portion, and the stopper 杆 attached in the direction of the interlocking slave cylinder. A stopper resilient member that performs a predetermined fluid pressure on the fluid pressure chamber, the stopper rod moves to a non-contact position with the piston of the interlocking slave cylinder by the fluid pressure, In a state where a predetermined hydraulic pressure does not act on the hydraulic pressure chamber, the stopper elastic member urges the stopper rod to a contact position with the piston of the interlocking slave cylinder, and comes into contact with the piston. A bar-handle vehicle interlocking brake mechanism that regulates the amount of forward movement of the piston. When a large-diameter flange portion is formed on the piston of the interlocking slave cylinder and a predetermined hydraulic pressure does not act on the hydraulic pressure chamber, the stopper rod protrudes toward the interlocking member side of the large-diameter flange portion and In addition to restricting the amount of advancement, a slope that gradually decreases in diameter toward the anti-linkage member side is formed on the anti-linkage member side of the outer peripheral surface of the large-diameter flange portion, and the anti-linkage member side protrudes from the tip surface of the stopper rod 2. The interlocking brake mechanism for a bar handle vehicle according to claim 1, wherein an inclined surface is formed.

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