JP6346815B2 - Bar handle vehicle brake system - Google Patents

Description

  The present invention relates to a brake device for a bar handle vehicle. More specifically, the first brake is operated independently by operating one brake operator, and the second brake is operated by operating the other brake operator. The present invention relates to a brake apparatus for a bar handle vehicle that operates one brake in conjunction with each other.

  Conventionally, as a brake device for a bar handle vehicle, a front wheel brake is independently operated via a first hydraulic master cylinder in accordance with an operation of one brake operator (for example, a brake lever), and the other brake operator ( For example, the hydraulic pressure is supplied to the rear wheel brake via the second hydraulic master cylinder according to the operation of the brake pedal), and the first slave via the interlocking slave cylinder that operates hydraulically according to the operation of the brake pedal. There was one that operated the hydraulic master cylinder in conjunction with the front wheel brake.

  Further, the first hydraulic master cylinder and the interlocking slave cylinder are arranged in parallel to the cylinder base, and the interlocking member that contacts the piston of the first hydraulic master cylinder and the piston of the interlocking slave cylinder on the cylinder base. When the hydraulic pressure is supplied to the interlocking slave cylinder, the interlocking member rotates to push the piston of the first hydraulic pressure master cylinder and to release the front wheel brake. There was one that was operated in conjunction (for example, see Patent Document 1).

JP 2007-153270 A

  However, in the above-mentioned Patent Document 1, since the first hydraulic master cylinder and the interlocking slave cylinder are formed in parallel on the cylinder base, the cylinder base disposed around the brake lever is enlarged. It was. In addition, since the piston inserted in each of the first hydraulic master cylinder and the interlocking slave cylinder is operated via an interlocking member rotatably provided on the cylinder base, the number of parts is reduced. Increased costs.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a bar handle vehicle brake device capable of reducing the cost and reducing the mechanism around one brake operator.

To achieve the above object, the bar handle vehicle brake device according to the present invention operates the first brake alone via the first hydraulic master cylinder by operating one brake operator, and the other brake operator. By operating the second brake, the hydraulic fluid is boosted by the second hydraulic master cylinder, the increased hydraulic pressure is supplied to the first hydraulic master cylinder, and the first brake is interlocked. In the brake apparatus for a bar handle vehicle to be operated, the first hydraulic master cylinder includes a bottomed cylinder hole in which a piston is inserted, a first hydraulic chamber provided on a bottom side of the cylinder hole, and the cylinder An interlocking hydraulic pressure chamber provided on the opening side of the hole, and an interlocking communication hole communicating with the interlocking hydraulic pressure chamber, the interlocking communication hole provided in the second hydraulic pressure master cylinder And a second pressure chamber connected by interlocking liquid pressure line, said one brake operation element is a brake lever, the lever mounting bracket provided on the cylinder body of the first hydraulic pressure master cylinder, the brake A lever is pivotally supported by a pivot, and a return spring is attached to the pivot to urge the brake lever in a counter-acting direction. The return spring is a coil disposed on the outer periphery of the pivot. A cylinder body contact piece that protrudes from one end of the coil portion and contacts the cylinder body, and a brake lever contact piece that protrudes from the other end of the coil portion and contacts the switch operating piece of the brake lever. wherein the brake lever, characterized in that the resilient force of the return spring, is biased in the counter-actuation direction It is.

  The cylinder body of the first hydraulic master cylinder is continuously formed with a cylinder hole and a large-diameter hole having a larger diameter than the cylinder hole, and the piston is disposed on the bottom side of the cylinder hole. A shaft portion, a small-diameter shaft portion disposed on the cylinder hole opening side, and a step portion formed between the small-diameter shaft portion and the large-diameter shaft portion, and an outer periphery of the small-diameter shaft portion and the large-diameter It is preferable that an annular collar member is disposed in a liquid-tight manner with a seal member between the inner peripheral surface of the diameter hole and the interlocking hydraulic pressure chamber is formed between the stepped portion and the collar member.

The first brake is a hydraulic brake, the second brake is a mechanical brake, and the second hydraulic master cylinder and a lever mechanism are provided between the brake lever and the other brake operator. The master cylinder unit is disposed, and the second brake is operated by the operation of the other brake operator, the second brake is operated through the lever mechanism, and the second hydraulic master cylinder is operated to operate the interlocking hydraulic pressure. the hydraulic fluid that is pressurized before Symbol first hydraulic pressure master cylinder through the pipe may be supplied.

  Further, each of the first brake and the second brake is a hydraulic brake, and the hydraulic fluid boosted by the second hydraulic master cylinder is supplied to the second brake and the first hydraulic master cylinder. You may do it.

  According to the bar handle vehicle brake device of the present invention, the first hydraulic pressure master cylinder that is operated by the operation of one of the brake operators is provided with a cylinder hole into which the piston is inserted and a first hole provided on the bottom side of the cylinder hole. A hydraulic chamber, an interlocking hydraulic pressure chamber provided on the opening side of the cylinder hole, and an interlocking communication hole communicating with the interlocking hydraulic pressure chamber are provided, and the interlocking communication hole and the other brake operator By connecting the second hydraulic pressure chamber of the second hydraulic pressure master cylinder, which is increased by operation, with the hydraulic pressure piping for interlocking, the first brake is operated via the first hydraulic pressure master cylinder by the operation of one brake operator. Is operated independently, and the second brake is operated by operating the other brake operator, and from the interlocking communication hole to the interlocking hydraulic pressure chamber via the second hydraulic pressure chamber and the interlocking hydraulic pressure pipe. Hydraulic pressure is supplied, the first hydraulic pressure master It can be operated in conjunction with the first brake via Linda. Further, by providing the first hydraulic pressure cylinder and the interlocking hydraulic pressure chamber in the first hydraulic pressure master cylinder, it becomes unnecessary to provide an interlocking slave cylinder separately from the hydraulic pressure master cylinder as in the prior art. The mechanism around one brake operator can be reduced in size, the number of parts can be reduced, and the cost can be reduced.

  The cylinder body of the first hydraulic master cylinder is continuously formed with a cylinder hole and a large diameter hole larger than the cylinder hole, and the piston has a large diameter shaft portion disposed on the cylinder hole bottom side. A small-diameter shaft portion disposed on the cylinder hole opening side, and a step portion formed between the small-diameter shaft portion and the large-diameter shaft portion, and an outer periphery of the small-diameter shaft portion and an inner peripheral surface of the large-diameter hole An annular collar member is arranged in a liquid-tight manner via a seal member between them, and an interlocking hydraulic pressure chamber is formed between the stepped portion and the collar member, thereby forming the interlocking hydraulic pressure chamber with a simple structure. The cost can be reduced.

  Further, one brake operation element is a brake lever, and the brake lever is pivotally supported by a pivot on a lever mounting bracket provided on the cylinder body of the first hydraulic master cylinder, and the brake lever is mounted on the pivot. By attaching the return spring that urges in the counter-acting direction, the brake lever is held at the initial position by the urging force of the return spring when the first brake is operated in conjunction with the operation of the brake pedal. Therefore, it is possible to always hold and operate the brake lever at the same position, so that a good operation feeling can be maintained.

  The first brake is a hydraulic brake, the second brake is a mechanical brake, and a master cylinder is provided with a second hydraulic master cylinder and a lever mechanism between one brake operator and the other brake operator. Even if the units are arranged, and even if the first brake and the second brake are hydraulic brakes, the above-described effects can be obtained.

It is II sectional drawing of FIG. It is sectional drawing of the master cylinder unit which shows the 1st example of a form of this invention. It is explanatory drawing of the brake device for bar handle vehicles similarly. It is a top view of a hydraulic master cylinder device similarly. It is a bottom view of a hydraulic master cylinder device similarly. It is the one side view of a hydraulic master cylinder device similarly. It is the other side view of a hydraulic master cylinder device similarly. It is explanatory drawing of the hydraulic master cylinder apparatus at the time of similarly operating a brake lever and operating a front-wheel brake independently. It is explanatory drawing of the hydraulic-pressure master cylinder apparatus at the time of operating a brake pedal similarly, operating in conjunction with a rear-wheel brake by operating a brake pedal. It is explanatory drawing of a master cylinder unit at the same time operating a brake pedal and operating a front wheel brake in conjunction with a rear wheel brake. Similarly, it is explanatory drawing of the master cylinder unit of the state in which rotation of the piston pushing arm was controlled. It is explanatory drawing of the brake device for bar handle vehicles which shows the 2nd form example of this invention.

  1 to 11 are views showing a first embodiment of a bar handle vehicle brake device according to the present invention. As shown in FIG. 3, the bar handle vehicle brake device 1 of the present embodiment includes a hydraulic front wheel brake 2 (first brake of the present invention) and a mechanical rear wheel brake 3 (second brake of the present invention). ), A brake master cylinder device 5 having a brake lever 4 (one brake operator of the present invention), a brake pedal 6 (the other brake operator of the present invention), a brake pedal 6 and a hydraulic master cylinder. And a master cylinder unit 7 disposed between the apparatus 5 and the apparatus 5.

  A disc brake having a disc rotor 2a and a caliper body 2b is applied to the front wheel brake 2, and a front-wheel hydraulic pipe 8 is connected to the caliper body 2b. The rear wheel brake 3 has a pair of brake shoes 3b, 3b facing each other in a back plate 3a, and both brake shoes 3b, 3b are expanded in the manner that the anchor pin 3d is expanded as a fulcrum by rotation of the cam shaft 3c. The rear wheel brake rod 9 is connected to a cam lever 3e having one end fixed to the camshaft 3c.

  The hydraulic master cylinder device 5 includes a first hydraulic master cylinder 11 attached to a handlebar 10 that steers a front wheel, the brake lever 4 attached to the first hydraulic master cylinder 11, and a reservoir 5a. I have. The first hydraulic master cylinder 11 includes a handle bar 10 that is held by a bracket 11b and a holder 12 that are integrally formed with the first cylinder body 11a, and is fastened with bolts 13 so that the front portion of the handle bar 10 is secured to the front of the vehicle body. Placed on the side.

  The first cylinder body 11a has a bottomed first cylinder hole 11c that opens to the outer side of the vehicle body, and a large-diameter hole 11d that is continuous with the first cylinder hole 11c. One piston 14 is movably inserted, and a reservoir 5a for accumulating hydraulic fluid is integrally provided on the upper portion of the first cylinder body 11a. Further, an interlocking communication hole 15 is formed on the vehicle body front side of the first cylinder hole 11c of the first cylinder body 11a. A bifurcated lever mounting bracket 11e is formed on the outer peripheral portion of the large diameter hole 11d of the first cylinder body 11a so as to protrude toward the front of the vehicle body. The brake lever 4 uses the first pivot 16 on the lever mounting bracket 11e. It is pivotally supported. A brake lamp switch 17 is fixed with screws on the lever mounting bracket 11e side of the first cylinder body 11a on the vehicle body lower side.

  The first cylinder hole 11c includes a first cup seal 18 disposed with the lip portion 18a facing the cylinder hole bottom side, and a second cup seal 19 disposed with the lip portion 19a facing the cylinder hole opening side. A liquid chamber 5 b that is provided on the inner peripheral wall and communicates with the reservoir 5 a is provided between the first cup seal 18 and the second cup seal 19. The first piston 14 includes a small-diameter shaft portion 14a that protrudes into the large-diameter hole 11d from the opening portion of the first cylinder hole 11c, and a large-diameter shaft portion 14c that has a concave portion 14b that opens on the bottom side of the first cylinder hole 11c. It has. A first hydraulic chamber 20 is defined between the bottom of the first cylinder hole 11c, the first cup seal 18 and the bottom of the recess 14b, and the first hydraulic chamber 20 is formed at the bottom of the first cylinder hole 11c. A first union bolt 21 communicating with the first union bolt 21 is provided. The front union hydraulic pipe 8 is connected to the first union bolt 21, and a hydraulic chamber (not shown) is formed in the caliper body 2 b via the first union bolt 21 and the unprecedented front line hydraulic pipe 8. The hydraulic pressure is supplied. A plurality of small-diameter communication ports 14d penetrating the inside and outside of the circumferential wall are formed in the circumferential wall of the recess 14b of the first piston 14, and the bottom of the recess 14b of the first piston 14 and the first cylinder hole 11c A first return spring 22 is disposed between the bottom surface and the non-operating first piston 14 to return to a preset initial position.

  An annular collar is provided between the outer periphery of the small-diameter shaft portion 14a of the first piston 14 and the inner peripheral surface of the large-diameter hole 11d via an inner peripheral cup seal 23a and an outer peripheral O-ring 23b serving as a sealing material. The member 23 is disposed, and the collar member 23 is positioned by a circlip 24 attached to the inner peripheral portion of the large-diameter hole 11d. The collar member 23 is disposed in a liquid-tight manner with respect to the large-diameter hole 11d by an outer peripheral side O-ring 23b disposed on the outer peripheral side, and the inner peripheral side cup seal 23a provided on the inner peripheral side causes The small-diameter shaft portion 14a of one piston 14 is inserted into the collar member 23 so as to be liquid-tight and movable.

  The initial position of the first piston 14 is set by the elastic force of the first return spring 22 and the tip of the small-diameter shaft portion 14a abuts against the working arm 4a of the brake lever 4, and the small-diameter shaft portion 14a and the large-diameter shaft An interlocking hydraulic pressure chamber 25 is defined between the step portion 14 e formed between the portion 14 c and the collar member 23.

  The interlocking communication hole 15 is open at one end to the outer surface of the first cylinder body 11a and at the other end to the interlocking hydraulic pressure chamber 25, and is provided with a interlocking union bolt 26 at one end. 26 is connected to an interlocking hydraulic pipe 27 that communicates with the master cylinder unit 7.

  The brake lever 4 includes an action arm 4a, a rotation base 4b, a grip 4c, and a switch operating piece 4d. The rotating base 4b is inserted between the bifurcated lever mounting bracket 11e, and the first pivot 16 is inserted into a coaxial insertion hole formed in the rotating base 4b and the lever mounting bracket 11e, thereby mounting the lever. The bracket 11e is pivotally supported. In addition, a return spring 28 is attached to the head that protrudes from the lever attachment bracket 11e of the first pivot 16 toward the upper side of the vehicle body. The return spring 28 includes a coil portion 28a disposed on the outer periphery of the first pivot 16, a cylinder body contact piece 28b that protrudes from one end of the coil portion 28a and contacts the first cylinder body 11a, and the other end of the coil portion 28a. A brake lever abutting piece 28c that protrudes from the brake lever 4 and abuts against the switch actuating piece 4d of the brake lever 4. The brake lever 4 is urged in the counteracting direction by the elastic force of the return spring 28.

  The brake pedal 6 is rotatably provided on the vehicle body via a fixed shaft 29. By operating the brake pedal 6, the tow rod 30 is pulled, and the rear lever is driven via the equalizer lever 7a of the master cylinder unit 7. The rear wheel brake rod 9 for operating the wheel brake 3 is pulled, the rear wheel brake 3 is operated, and the second hydraulic master cylinder 31 of the master cylinder unit 7 is operated to connect the interlocking hydraulic pipe 27 and the first The hydraulic pressure is supplied to the front wheel brake 2 via the one hydraulic pressure master cylinder 11 and the hydraulic pressure pipe 8 for the front wheel, and the front wheel brake 2 is operated in conjunction.

  The master cylinder unit 7 includes the second hydraulic master cylinder 31 that supplies hydraulic pressure to the first hydraulic master cylinder 11 and a piston push arm 7b that pushes the second piston 32 of the second hydraulic master cylinder 31. And an equalizer lever 7a. In the second hydraulic master cylinder 31, a second cylinder hole 31b is formed in the second cylinder body 31a, and a first cup seal 33 provided on the inner periphery of the second cylinder hole 31b is formed in the second cylinder hole 31b. The second piston 32 is inserted through the second cup seal 34. The second piston 32 is inserted in a state protruding from the opening of the second cylinder hole 31b, and the piston pushing arm 7b is rotatably attached to the cylinder hole opening of the second cylinder body 31a. A moving arm mounting bracket 31c is projected. A liquid supply chamber 35 is formed between the first cup seal 33 and the second cup seal 34 in the second cylinder hole 31 b, and a hydraulic fluid supply pipe 36 a connected to the reservoir 36 is formed in the liquid supply chamber 35. Are connected. A bolt mounting bracket 31d for mounting the stopper bolt 37 projects from the second cylinder hole bottom side of the second cylinder body 31a and the counter-acting fluid supply hole side.

  The second piston 32 includes a small-diameter shaft portion 32a protruding from the opening portion of the second cylinder hole 31b, and a large-diameter shaft portion 32c having a recess portion 32b opening on the bottom side of the second cylinder hole 31b. A second hydraulic pressure chamber 38 is defined between the bottom of the hole 31 b and the first cup seal 33. At the bottom of the second cylinder hole 31b, a union hole 31e communicating with the second hydraulic pressure chamber 38 and a second union bolt 39 attached to the union hole 31e are provided. A hydraulic pipe 27 is connected. A second return spring 40 is disposed between the bottom surface of the recess 32b of the second piston 32 and the bottom surface of the second cylinder hole 31b to return the non-operating second piston 32 to a preset initial position. Has been. A plurality of small-diameter communication ports 32d penetrating the inside and the outside of the peripheral wall are formed in the peripheral wall of the recess 32b of the second piston 32, and the second hydraulic pressure chamber 38 operates with the communication port 32d and the liquid supply chamber 35. The reservoir 36 communicates with the liquid supply pipe 36a.

  The piston pusher arm 7b is formed in an arc shape, and is attached to the pusher arm mounting bracket 31c so as to be turnable by the second pivot 41, and from the turn base 7c to the second cylinder body 31a. A positioning arm 7d extending to the outer surface 31f side of the bolt mounting bracket side and having a tip abutting against the outer surface 31f, and extending from the rotating base portion 7c to the second cylinder hole 31b side and abutting against the second piston 32 A piston pushing portion 7e that pushes the second piston 32, and extends from the piston pushing portion 7e to the stopper bolt 37 side, and the tip abuts against the stopper bolt 37 to restrict the rotation of the piston pushing arm 7b. And a rotation restricting arm 7f. In addition, a spring member 42 is contracted between the rotation restricting arm 7f and the bolt mounting bracket 31d, and the piston pushing arm 7b is urged in the counter-acting direction by the elastic force of the spring member 42, thereby positioning. The initial position is determined by the arm 7d coming into contact with the outer surface 31f of the second cylinder body 31a.

  One end of the equalizer lever 7a is rotatably connected to the rotation restricting arm 7f of the piston pushing arm 7b via the first rotation shaft 43, and the other end is connected to the rear wheel brake rod 9 in the second time. The traction rod 30 is rotatably connected by a third rotation shaft 45 at an intermediate position near the other end while being rotatably connected via a moving shaft 44.

  In the bar handle vehicle brake device 1 of the present embodiment formed as described above, when the brake lever 4 is operated, as shown in FIG. 8, the rotation base portion 4 b of the brake lever 4 has the first pivot 16. And the working arm 4 a pushes the first piston 14 of the first hydraulic master cylinder 11. When the first piston 14 moves to the bottom side of the first cylinder hole 11c and the communication port 14d passes through the first cup seal 18, hydraulic pressure is generated in the first hydraulic pressure chamber 20, and the pressurized hydraulic fluid is It is supplied to the front wheel brake 2 via the first union bolt 21 and the front wheel hydraulic pipe 8 to operate the front wheel brake 2 alone. At this time, as the first piston 14 moves, the volume of the interlocking hydraulic pressure chamber 25 increases, but the hydraulic fluid is connected to the interlocking communication hole 15, the interlocking union bolt 26, and the interlocking hydraulic pressure pipe 27. , The reservoir 36 is replenished via the second hydraulic master cylinder 31.

  Further, when the brake pedal 6 is operated, the tow rod 30 is pulled, and one end side of the equalizer lever 7a is in a state in which the initial position is maintained by the elastic force of the spring member 42. The position is fixed, the equalizer lever 7a rotates about the first rotation shaft 43, the rear wheel brake rod 9 is pulled, and the rear wheel brake 3 operates.

  When the brake pedal 6 is further operated, as shown in FIGS. 9 and 10, the equalizer lever 7 a is further pulled, and one end side of the equalizer lever 7 a is pulled against the elastic force of the spring member 42. As a result, the piston pushing arm 7b rotates about the second pivot 41, the positioning arm 7d moves away from the outer surface 31f of the second cylinder body 31a, and the piston pushing portion 7e pushes the second piston 32. . Accordingly, when the second piston 32 moves to the bottom side of the second cylinder hole 31b and the communication port 32d passes through the first cup seal 33, hydraulic pressure is generated in the second hydraulic pressure chamber 38, and the pressure is increased. The working fluid is defined in the first hydraulic master cylinder 11 through the union hole 31e, the second union bolt 39, the interlocking hydraulic pressure pipe 27, the interlocking union bolt 26, and the interlocking communication hole 15. Supplyed to the hydraulic chamber 25. As a result, when the first piston 14 moves to the bottom side of the cylinder hole and the communication port 14 passes through the first cup seal 18, hydraulic pressure is generated in the first hydraulic pressure chamber 20, and the pressure is increased in the first hydraulic pressure chamber 20. The hydraulic fluid thus supplied is supplied to the front wheel brake 2 via the first union bolt 21 and the front wheel hydraulic pipe 8 to operate the front wheel brake 2 in conjunction with each other. At this time, the brake lever 4 is biased in the counter-acting direction by the elastic force of the return spring 28, so that the initial position is maintained.

  If the brake pedal 6 is further operated from this state, as shown in FIG. 11, the rotation of the piston pushing arm 7b is caused by the rotation regulating arm 7f of the piston pushing arm 7b coming into contact with the stopper bolt 37. The equalizer lever 7a is rotated about the first rotation shaft 43 in a state where the position of the first rotation shaft 43 is fixed and the rear wheel brake rod 9 is further pulled, whereby the rear wheel Only the brake 3 is further activated.

  In this embodiment, as described above, the first cylinder body 11 a of the first hydraulic master cylinder 11 communicates with the first hydraulic chamber 20, the interlocking hydraulic chamber 25, and the interlocking hydraulic chamber 25. The interlocking communication hole 15 is provided, and the interlocking hydraulic pressure chamber 25 and the second hydraulic pressure chamber 38 of the second hydraulic pressure master cylinder 31 are connected by the interlocking hydraulic pressure pipe 27, whereby the brake lever 4 is operated. The front wheel brake 2 can be operated independently through the first hydraulic master cylinder 11, and the rear wheel brake 3 is operated through the operation of the brake pedal 6 and the first hydraulic master cylinder 11 is used. The front wheel brake 2 can be operated in conjunction.

  As a result, the front wheel brake 2 can be operated independently only with the first hydraulic master cylinder 11 without using the interlocking slave cylinder separately from the hydraulic master cylinder, or the rear wheel brake 3 The mechanism can be operated in conjunction with each other, the mechanism around the brake lever 4 can be reduced in size, the number of parts can be reduced, and the cost can be reduced. Further, the brake lever 4 is pivotally supported by the first pivot 16 on a lever mounting bracket 11e provided on the first cylinder body 11a of the first hydraulic master cylinder 11, and the brake lever is supported on the first pivot 16. When the front wheel brake 2 is operated in conjunction with the operation of the brake pedal 6 by operating the brake pedal 6, the brake lever 4 is initially moved by the biasing force of the return spring 28. Since the brake lever 4 can be held in the position, the brake lever 4 can be prevented from rattling or vibrating, and a good operation feeling can be maintained.

  Further, a collar member 23 provided in a liquid-tight manner between the step portion 14e of the first piston 14, the inner peripheral surface of the large-diameter hole 11d of the first cylinder body 11a, and the outer periphery of the small-diameter shaft portion 14a of the first piston 14. By defining the interlocking hydraulic pressure chamber 25 between the two, the interlocking hydraulic pressure chamber 25 can be formed with a simple structure, and the cost can be reduced. Further, the collar member 23 is liquid-tightly arranged with respect to the large-diameter hole 11d by an outer peripheral side O-ring 23b arranged on the outer peripheral side, and an inner peripheral side cup seal 23a provided on the inner peripheral side, Since the small-diameter shaft portion 14a of the first piston 14 is inserted into the collar member 23 so as to be liquid-tight and movable, the collar member 23 is moved to the first without impairing the mobility of the first piston 14. It can arrange | position liquid-tightly between the internal peripheral surface of 11d of large diameter holes of the cylinder body 11a, and the outer periphery of the small diameter shaft part 14a of the 1st piston 14. FIG.

  FIG. 12 shows a second embodiment of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The bar handle vehicle brake device 51 of the present embodiment includes a hydraulic front wheel brake 2 (first brake of the present invention), a hydraulic rear wheel brake 52 (second brake of the present invention), and a brake lever 4 ( The hydraulic master cylinder device 5 having one brake operation element of the present invention, the brake pedal 6 (the other brake operation element of the present invention), and the second hydraulic pressure for boosting the hydraulic fluid by operating the brake pedal 6 And a master cylinder 53.

  As with the front wheel brake 2, the rear wheel brake 52 is applied with a disk brake including a disk rotor 52a and a caliper body 52b, and a rear wheel hydraulic pipe 54 is connected to the caliper body 52b.

  In this embodiment, when the brake pedal 6 is operated, the hydraulic fluid in the second hydraulic master cylinder 53 is increased, and the increased hydraulic fluid is supplied to the caliper body 52b of the rear wheel brake 52 via the rear wheel hydraulic piping 54. To the first hydraulic master cylinder 11 via the interlocking hydraulic pipe 27, and boosted operation as in the first embodiment. The liquid is supplied to the caliper body 2b of the front wheel brake 2, and the front wheel brake 2 is operated in conjunction.

  The present invention is not limited to the above-described embodiment, and the structure of the master cylinder unit is arbitrary. Further, the first hydraulic master cylinder is not limited to the plunger type in which the first piston is inserted by attaching the seal member to the first cylinder hole as in the above-described embodiment, and the first piston is provided with the seal member. It does not matter if it is of the type that is attached. The structure of the front wheel brake and the rear wheel brake is also arbitrary. Furthermore, the present invention can also be applied to a scooter type vehicle using both brake operators as brake levers.

DESCRIPTION OF SYMBOLS 1 ... Bar-handle vehicle brake device, 2 ... Front wheel brake, 2a ... Disc rotor, 2b ... Caliper body, 3 ... Rear wheel brake, 3a ... Back plate, 3b ... Brake shoe, 3c ... Cam shaft, 3d ... Anchor pin, 3e ... cam lever, 4 ... brake lever, 4a ... working arm, 4b ... rotating base, 4c ... grip part, 4d ... switch operating piece, 5 ... hydraulic master cylinder device, 5a ... reservoir, 5b ... liquid chamber, 6 ... Brake pedal, 7 ... Master cylinder unit, 7a ... Equalizer lever, 7b ... Piston pushing arm, 7c ... Rotating base, 7d ... Positioning arm, 7e ... Piston pushing part, 7f ... Rotation restricting arm, 8 ... For front wheel Hydraulic piping, 9 ... rear wheel brake rod, 10 ... handlebar, 11 ... first hydraulic master cylinder, 11a ... first cylinder body, 11b ... bracket 11c: first cylinder hole, 11d: large diameter hole, 11e: lever mounting bracket, 12 ... holder, 13 ... bolt, 14 ... first piston, 14a ... small diameter shaft portion, 14b ... concave portion, 14c ... large diameter shaft portion 14d ... Communication port, 14e ... Step portion, 15 ... Communication communication hole, 16 ... First pivot, 17 ... Brake lamp switch, 18 ... First cup seal, 18a ... Lip portion, 19 ... Second cup seal, 19a Lip portion, 20 first hydraulic chamber, 21 first union bolt, 22 first return spring, 23 collar member, 23a inner cup seal, 23b outer O-ring, 24 circlip 25 ... Interlocking hydraulic chamber, 26 ... Interlocking union bolt, 27 ... Interlocking hydraulic pipe, 28 ... Return spring, 28a ... Coil part, 28b ... Cylinder body contact piece 28c ... Brake lever contact piece, 29 ... Fixed shaft, 30 ... Traction rod, 31 ... Second hydraulic master cylinder, 31a ... Second cylinder body, 31b ... Second cylinder hole, 31c ... Push arm mounting bracket, 31d ... Bolt mounting bracket, 31e ... Union hole, 31f ... Outer surface, 32 ... Second piston, 32a ... Small diameter shaft part, 32b ... Recess, 32c ... Large diameter shaft part, 32d ... Communication port, 33 ... First cup seal, 34 2nd cup seal, 35 ... Fluid supply chamber, 36 ... Reservoir, 36a ... Hydraulic fluid supply pipe, 37 ... Stopper bolt, 38 ... 2nd hydraulic pressure chamber, 39 ... 2nd union bolt, 40 ... 2nd return spring, DESCRIPTION OF SYMBOLS 41 ... 2nd pivot, 42 ... Spring member, 43 ... 1st rotating shaft, 44 ... 2nd rotating shaft, 45 ... 3rd rotating shaft, 51 ... Bar-handle vehicle brake device, 52 Rear wheel brakes, 52a ... disc rotor, 52 b ... caliper body, 53 ... second hydraulic pressure master cylinder, 54 ... rear wheel liquid pressure line

Claims (4)

By operating one brake operator, the first brake is operated independently via the first hydraulic master cylinder, and by operating the other brake operator, the second brake is operated, and the second hydraulic master cylinder In the brake apparatus for a bar handle vehicle, the hydraulic fluid is increased in pressure and the increased hydraulic pressure is supplied to the first hydraulic pressure master cylinder to operate the first brake in conjunction with each other.
The first hydraulic master cylinder includes a bottomed cylinder hole in which a piston is inserted, a first hydraulic chamber provided on the bottom side of the cylinder hole, and an interlock provided on the opening side of the cylinder hole. A hydraulic pressure chamber and an interlocking communication hole communicating with the interlocking hydraulic pressure chamber. The interlocking communication hole and the second hydraulic pressure chamber provided in the second hydraulic pressure master cylinder are used for interlocking. Connect with hydraulic piping,
The one brake operator is a brake lever. The brake lever is pivotally supported by a lever mounting bracket provided on a cylinder body of the first hydraulic master cylinder so as to be pivotable by a pivot. A return spring for urging the brake lever in the counter-acting direction is attached to the pivot,
The return spring includes a coil portion disposed on an outer periphery of the pivot, a cylinder body abutting piece projecting from one end of the coil portion and abutting on the cylinder body, and a brake lever projecting from the other end of the coil portion. A brake lever abutting piece that abuts on the switch actuating piece, and the brake lever is biased in the counter-acting direction by the resilient force of the return spring. .   The cylinder body of the first hydraulic master cylinder is continuously formed with a cylinder hole and a large-diameter hole larger in diameter than the cylinder hole, and the piston is disposed on the bottom side of the cylinder hole. A small-diameter shaft portion disposed on the cylinder hole opening side, and a step portion formed between the small-diameter shaft portion and the large-diameter shaft portion, and an outer periphery of the small-diameter shaft portion and the large-diameter hole An annular collar member is disposed in a liquid-tight manner with a seal member between the inner peripheral surface and the interlocking hydraulic pressure chamber is formed between the step portion and the collar member. Item 12. A brake device for a bar handle vehicle according to item 1. The first brake is a hydraulic brake, the second brake is a mechanical brake, and the master includes the second hydraulic master cylinder and a lever mechanism between the brake lever and the other brake operator. A cylinder unit is disposed, and the second brake is operated by operating the other brake operator, the second brake is operated through the lever mechanism, the second hydraulic master cylinder is operated, and the interlocking hydraulic pipe is connected. 3. The bar handle vehicle brake device according to claim 1, wherein the pressurized hydraulic fluid is supplied to the first hydraulic master cylinder via the first hydraulic pressure master cylinder . The first brake and the second brake are hydraulic brakes, respectively, and the hydraulic fluid boosted by the second hydraulic master cylinder is supplied to the second brake and the first hydraulic master cylinder. bar-handle vehicle brake system according to claim 1 or 2, wherein, wherein the.

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