JP6405147B2 - 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 a brake lever, the second brake is operated by operating a brake pedal, and the first brake is interlocked. The present invention relates to a brake apparatus for a bar handle vehicle to be operated.

  Conventionally, as a brake device for a bar handle vehicle, a hydraulic brake that operates by operating a brake lever, a mechanical brake that operates by operating a brake pedal, and a hydraulic pressure generated by operating a brake lever are relayed to the hydraulic brake. At the same time, there has been a master cylinder unit that generates hydraulic pressure for operating the hydraulic brake by operating force of a brake pedal.

  As this master cylinder unit, a piston fitted with a cup seal is inserted into a cylinder hole formed in the hydraulic master cylinder, and a hydraulic chamber, a relief port communicating with the hydraulic chamber, and a supply are inserted into the cylinder hole. There is a port formed, and the hydraulic pressure generated by operating the brake lever is supplied to the hydraulic pressure chamber via the relief port and the supply port, and supplied from the hydraulic pressure chamber to the hydraulic brake, Further, by operating the brake pedal, the traction means for operating the mechanical brake is pulled through the equalizer lever, and the piston of the hydraulic master cylinder is pushed to apply the hydraulic pressure to the hydraulic chamber. Some have been generated and supplied to a hydraulic brake (for example, see Patent Document 1).

JP 2006-103437 A

  However, in the above-mentioned patent document, when both the brake lever and the brake pedal are operated to push the piston while the hydraulic chamber is pressurized, the piston moves while pressure is applied to the cup seal. Therefore, the outer peripheral side of the cup seal was easily eaten by the relief port.

  Accordingly, an object of the present invention is to provide a bar handle vehicle brake device in which the durability of a cup seal used in a hydraulic master cylinder of a master cylinder unit is improved.

In order to achieve the above object, in the first configuration of the bar handle vehicle brake device of the present invention, the hydraulic pressure generated in the first hydraulic master cylinder by the operation of one of the brake operators is used as the second pressure of the master cylinder unit. The first brake is supplied to the first brake via the hydraulic master cylinder, and the first brake is operated independently. The second brake is operated by operating the other brake operator, and the second hydraulic master cylinder is supplied with the liquid. In the bar handle vehicle brake device that generates pressure, supplies the hydraulic pressure to the first brake, and operates the first brake in conjunction with the master cylinder unit, the master cylinder unit includes the second hydraulic pressure master cylinder and A plunger pushing arm for pushing the plunger of the second hydraulic master cylinder by operating the other brake operator, and the second hydraulic mass The cylinder has a bottomed cylindrical cylinder hole fitted with a pair of cup seals, a plunger inserted in the cylinder hole, a hydraulic chamber defined between the plunger and the bottom of the cylinder hole, The cylinder body of the second hydraulic pressure master cylinder has a hydraulic pressure introduction hole between the pair of cup seals for introducing the hydraulic pressure generated in the first hydraulic pressure master cylinder into the hydraulic pressure chamber. In addition, a union hole for supplying the hydraulic pressure of the hydraulic pressure chamber to the first brake is formed in parallel with the hydraulic pressure introduction hole, and the hydraulic pressure introduction hole in the initial state of the plunger, A communication port that communicates with the hydraulic chamber is formed, and a hydraulic pipe connected to the first hydraulic master cylinder is connected to the hydraulic pressure introduction hole via a first union bolt, and Connected to one brake The liquid pressure piping is characterized in that it is connected to the union holes through the second union bolts.

In the second configuration of the bar handle vehicle brake device according to the present invention, the hydraulic pressure generated in the first hydraulic master cylinder by the operation of one brake operator is used for the second hydraulic master cylinder of the master cylinder unit. The first brake is operated by itself, the second brake is operated by operating the other brake operator, and hydraulic pressure is generated in the second hydraulic master cylinder, In the bar-handle vehicle brake device that supplies the hydraulic pressure to the first brake and operates the first brake in conjunction with each other, the master cylinder unit includes the second hydraulic master cylinder and the other brake. A plunger pusher arm that pushes the plunger of the second hydraulic master cylinder by operation of an operator, and the second hydraulic master cylinder is a pair of A bottomed cylindrical cylinder hole fitted with a cup seal, a plunger inserted into the cylinder hole, a first hydraulic pressure chamber provided on the bottom side of the cylinder hole, and an opening side of the cylinder hole A second hydraulic pressure chamber provided, and a hydraulic pressure introduction hole communicating with the second hydraulic pressure chamber, through which the hydraulic pressure generated in the first hydraulic master cylinder is The plunger is pushed by being introduced into the second hydraulic pressure chamber, and a hydraulic pipe connected to the first hydraulic master cylinder is connected to the hydraulic pressure introducing hole via a first union bolt. In addition, a hydraulic pipe connected to the first brake is connected to the union hole via a second union bolt, and a second hole is formed in the second hydraulic pressure chamber to which a screw screw is screwed. It is characterized by being.

  Further, the other brake operator is a brake pedal, and the master cylinder unit is connected to the plunger pusher arm via a first support shaft at one end and operates the second brake at the other end. One connecting means is connected via a second support shaft, and a second connecting means connected to the brake pedal at an intermediate portion is provided with an equalizer lever connected via a third support shaft, It is preferable that a spring member is provided between the cylinder body of the second hydraulic master cylinder to urge the plunger pusher arm in the counter-acting direction.

  According to the first configuration of the bar handle vehicle brake device of the present invention, when one brake operation element is operated, the hydraulic pressure generated in the first hydraulic master cylinder is transferred to the second hydraulic fluid via the hydraulic pressure introduction hole. The hydraulic pressure introduced into the hydraulic pressure chamber of the pressure master cylinder passes through the hydraulic pressure chamber as it is and is supplied to the first brake, so that the first brake can be operated independently. When the other brake operator is operated, the second brake is activated, the plunger pusher arm pushes the plunger of the second hydraulic master cylinder, supplies the increased hydraulic pressure to the first brake, One brake can be operated in conjunction.

  Also, when both plungers are operated and the plunger pusher arm pushes the plunger while the hydraulic chamber is pressurized, the cup seal is installed in the cylinder bore even if fluid pressure is applied to the cup seal. Therefore, there is no fear of being eaten by the fluid pressure introducing hole, and the durability of the cup seal can be improved.

  Furthermore, the hydraulic pressure introduction hole is provided between the pair of cup seals, and the plunger is formed with a communication port that communicates the hydraulic pressure introduction hole and the hydraulic pressure chamber in the initial state of the plunger. The hydraulic pressure can be introduced into the hydraulic pressure chamber of the second hydraulic master cylinder via the hydraulic pressure introduction hole and the communication port, and the cylinder hole can be reduced in size. Further, since the hydraulic pressure introduction hole and the union hole are formed in the cylinder body in parallel, the processing cost can be reduced.

Further, according to the second configuration of the bar handle vehicle brake device of the present invention, the second hydraulic master cylinder is inserted into the bottomed cylindrical cylinder hole fitted with a pair of cup seals and the cylinder hole. A plunger, a first hydraulic pressure chamber provided on the bottom side of the cylinder hole, a second hydraulic pressure chamber provided on the opening side of the cylinder hole, and a hydraulic pressure introduction hole communicating with the second hydraulic pressure chamber; The hydraulic pressure generated in the first hydraulic pressure master cylinder is introduced into the second hydraulic pressure chamber through the hydraulic pressure introduction hole, and when one of the brake operators is operated, the first hydraulic pressure master cylinder The hydraulic pressure generated in step 1 is introduced into the second hydraulic pressure chamber through the hydraulic pressure introduction hole, and the volume of the second hydraulic pressure chamber increases, so that the plunger is pushed and hydraulic pressure is applied to the first hydraulic pressure chamber. And the increased hydraulic pressure is supplied to the first brake. To operate in Germany. When the other brake operator is operated, the second brake is activated, the plunger pusher arm pushes the plunger of the second hydraulic master cylinder, supplies the increased hydraulic pressure to the first brake, One brake can be operated in conjunction.

  Further, the master cylinder unit has a plunger pusher arm connected to one end via a first support shaft, and a first connecting means for operating a second brake connected to the other end via a second support shaft. The second connecting means connected to the brake pedal includes an equalizer lever connected via the third support shaft, and the plunger pushing arm is interposed between the plunger pushing arm and the cylinder body of the second hydraulic master cylinder. By providing the spring member that urges the valve in the counter-acting direction, there is no possibility that the plunger pushing arm may rattle. Also, by changing the spring force of the spring member, the timing of the operation of the front wheel brake with respect to the rear wheel brake can be shifted back and forth, and the braking force distribution can be changed to match the driving situation and road situation. Braking is possible.

It is sectional drawing of the master cylinder unit which shows the 1st example of a form of this invention. It is a front view which similarly shows a master cylinder unit. It is explanatory drawing of the brake device for bar handle vehicles which shows the 1st form example of this invention. It is a partial cross section front view which similarly shows the master cylinder unit of an interlocking state. It is a partial cross section front view which similarly shows the master cylinder unit of the state in which rotation of the plunger pusher was controlled. It is a front view of the master cylinder unit which shows the 2nd form example of this invention. It is VII-VII sectional drawing of FIG. It is sectional drawing of the master cylinder unit which shows the 2nd form example of this invention. It is sectional drawing of a master cylinder unit when operating a brake lever similarly. It is sectional drawing of a master cylinder unit when operating a brake lever and a brake pedal similarly. It is a partial cross section front view which similarly shows the master cylinder unit of the state in which rotation of the plunger pusher was controlled.

  1 to 5 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 (first connecting means of the present invention) is connected to a cam lever 3e having one end fixed to the cam shaft 3c.

  The hydraulic master cylinder device 5 is a well-known one, and a reservoir-integrated first hydraulic master cylinder 11 attached to a handlebar 10 that steers the front wheel, and the brake attached to the first hydraulic master cylinder 11 Lever 4. The first hydraulic master cylinder 11 holds the handlebar 10 with a bracket 11a and a holder 11b integrally formed on the cylinder body, and these are fastened with bolts 11c and arranged on the front side of the handlebar 10 on the vehicle body. Is done.

  The brake pedal 6 is rotatably provided on the vehicle body via the fixed shaft 6a. By operating the brake pedal 6, the tow rod 12 (second connecting means of the present invention) is pulled, and the master cylinder unit 7 The rear wheel brake rod 9 for operating the rear wheel brake 3 is pulled through the equalizer lever 13 and the rear wheel brake 3 is operated, and the second hydraulic master cylinder 14 of the master cylinder unit 7 is operated, Hydraulic pressure is supplied to the front wheel brake 2 via the front wheel hydraulic pipe 8 so that the front wheel brake 2 is operated in conjunction.

  The master cylinder unit 7 includes the second hydraulic master cylinder 14 that supplies hydraulic pressure to the caliper body 2b of the front wheel brake 2, a plunger pushing arm 16 that pushes the plunger 15 of the second hydraulic master cylinder 14, Equalizer lever 13 is provided. The cylinder body 14a of the second hydraulic master cylinder 14 is formed with a cylinder hole 14b fitted with a first cup seal 17a and a second cup seal 17b on the inner periphery, and a plunger 15 is inserted into the cylinder hole 14b. Has been.

  A fluid supply chamber 14c and a fluid pressure introducing hole 14d are formed between the first cup seal 17a and the second cup seal 17b of the cylinder hole 14b. The fluid pressure introducing hole 14d includes a first fluid pressure master. A hydraulic pipe 18 connected to the cylinder 11 is connected via a first union bolt 18a. Further, a push arm mounting bracket 14e for rotatably mounting the plunger push arm 16 is provided on the cylinder hole opening side of the cylinder body 14a so as to protrude from the cylinder hole bottom side of the cylinder body 14a and on the opposite side. A bolt mounting bracket 14f for mounting the stopper bolt 19 projects from the hydraulic fluid supply hole side.

  The plunger 15 is inserted in a state protruding from the opening of the cylinder hole 14b, and has a small-diameter shaft portion 15a protruding from the opening of the cylinder hole 14b and a large-diameter shaft having a recess 15b opening on the bottom side of the cylinder hole 14b. The hydraulic chamber 20 is defined between the bottom of the cylinder hole 14b and the bottom of the recess 15b of the plunger 15. A union hole 14g communicating with the hydraulic pressure chamber 20 is formed in the bottom of the cylinder hole 14b in parallel with the hydraulic pressure introducing hole 14d. The front wheel hydraulic pipe 8 is connected to the second union bolt in the union hole 14g. It is connected via 8a. Further, a return spring 21 is disposed between the bottom surface of the concave portion 15b of the plunger 15 and the bottom surface of the cylinder hole 14b to return the inoperative plunger 15 to a preset initial position. A plurality of small-diameter communication ports 15d penetrating the inside and outside of the peripheral wall are formed in the peripheral wall of the concave portion 15b of the plunger 15, and the hydraulic chamber 20 is connected to the communication port 15d and the liquid supply chamber at the initial position of the plunger 15. 14 c, the hydraulic pressure introduction hole 14 d, the first union bolt 18 a and the hydraulic pipe 18 communicate with the first hydraulic master cylinder 11.

  The plunger pusher arm 16 is formed in a circular arc shape, and a turn base 16a that is turnably attached to the push arm mounting bracket 14e by a pivot 22, and an anti-bolt mounting bracket side of the cylinder body 14a from the turn base 16a. A positioning arm 16b extending to the outer surface 14h side and having a tip abutting on the outer surface 14h, and a plunger pusher extending from the rotating base portion 16a to the cylinder hole 14b side and contacting the plunger 15 to push the plunger 15 A moving part 16c and a rotation restricting arm 16d extending from the plunger pushing part 16c to the stopper bolt 19 side and having a tip abutting against the stopper bolt 19 to restrict the turning of the plunger pushing arm 16 are provided. . Further, a spring member 23 is contracted between the rotation restricting arm 16d and the bolt mounting bracket 14f, and the plunger pushing arm 16 is urged in the counter-acting direction by the elastic force of the spring member 23, thereby positioning. The initial position is determined by the arm 16b coming into contact with the outer surface 14h of the cylinder body 14a, and the stopper bolt 19 is attached to the bolt mounting bracket 14f so that the protruding amount can be adjusted.

  One end of the equalizer lever 13 is rotatably connected to the rotation restricting arm 16d of the plunger pusher arm 16 via the first support shaft 24, and the other end is connected to the rear wheel brake rod 9 as the second support shaft. The traction rod 12 is rotatably connected by a third support shaft 26 at an intermediate position near the other end.

  When the brake lever 4 is operated, the bar handle vehicle brake device 1 of the present embodiment formed as described above generates hydraulic pressure in the first hydraulic master cylinder 11 of the hydraulic master cylinder device 5, The increased hydraulic pressure is introduced into the hydraulic pressure chamber 20 of the master cylinder unit 7 through the hydraulic pressure pipe 18, the first union bolt 18a, the hydraulic pressure introduction hole 14d, the liquid supply chamber 14c, and the communication port 15d. The plunger 15 is in a state where the initial position is held by the abutting force of the return spring 21 and the plunger pushing arm 16, and the introduced hydraulic pressure passes through the hydraulic pressure chamber 20 as it is. Then, it is supplied to the caliper body 2b of the front wheel brake 2 through the union hole 14g, the second union bolt 8a, and the front wheel hydraulic pipe 8 to operate the front wheel brake 2 alone.

  Further, when the brake pedal 6 is operated, the tow rod 12 is pulled, and one end side of the equalizer lever 13 is in a state in which the initial position is maintained by the elastic force of the spring member 23, so that the position of the first support shaft 24 is reached. Is fixed, the equalizer lever 13 rotates about the first support shaft 24, the rear wheel brake rod 9 is pulled, and the rear wheel brake 3 is actuated.

  When the brake pedal 6 is further operated, the equalizer lever 13 is further pulled as shown in FIG. 4, and one end side of the equalizer lever 13 is pulled against the elastic force of the spring member 23. Thereby, the plunger pushing arm 16 rotates around the pivot 22, the positioning arm 16 b is separated from the outer surface 14 h of the cylinder body 14 a, and the plunger pushing portion 16 c pushes the plunger 15. Along with this, when the plunger 15 moves to the bottom side of the cylinder hole 14b and the communication port 15d passes through the first cup seal 17a, hydraulic pressure is generated in the hydraulic chamber 20, and the pressurized hydraulic fluid is unioned. It is supplied to the caliper body 2b of the front wheel brake 2 through the hole 14g, the second union bolt 8a, and the front wheel hydraulic pipe 8 to operate the front wheel brake 2 in conjunction with each other. Further, as shown in FIG. 5, if the brake pedal 6 is further operated after the rotation of the plunger pusher arm 16 is restricted by the contact between the tip of the stopper bolt 19 and the plunger pusher arm 16, the equalizer is operated. The lever 13 rotates about the first support shaft 24, the rear wheel brake rod 9 is pulled, and the rear wheel brake 3 operates.

  Further, when both the brake lever 4 and the brake pedal 6 are operated, the hydraulic pressure from the first hydraulic master cylinder 11 acts on the hydraulic chamber 20 of the second hydraulic master cylinder 14, and the second hydraulic master cylinder similarly. The pressing force of the plunger pressing arm 16 acts on the 14 plungers 15. When the pressing force from the plunger pushing arm 16 is larger than the hydraulic pressure from the first hydraulic master cylinder 11, the plunger pushing arm 16 rotates as described above to operate the front wheel brake 2. To do.

  On the other hand, when the hydraulic pressure from the first hydraulic master cylinder 11 is larger than the pressing force from the plunger pusher arm 16, the hydraulic pressure from the first hydraulic master cylinder 11 is changed to the plunger pusher arm 16. The front wheel brake 2 is hydraulically operated while passing through the hydraulic pressure chamber 20 as it is while preventing the rotation and the forward movement of the plunger 15. Further, since the plunger pusher arm 16 is prevented from rotating, the operation of the brake pedal 6 causes the equalizer lever 13 to rotate about the first support shaft 24 and the rear wheel brake rod 9 is pulled. Then, the rear wheel brake 3 operates.

  Further, when both the brake lever 4 and the brake pedal 6 are operated and the hydraulic pressure from the first hydraulic master cylinder 11 is greater than the pressing force from the plunger pusher arm 16, that is, the communication of the plunger 15. When the port 15d is in the communication state, the hydraulic pressure of the front wheel hydraulic pipe 8, the hydraulic chamber 20, and the hydraulic pipe 18 is returned to the first hydraulic master cylinder 11 by releasing the operation of the brake lever 4. It is.

  Further, when the pressing force from the plunger pushing arm 16 is larger than the hydraulic pressure from the first hydraulic master cylinder 11, that is, when the communication port 15d of the plunger 15 is closed, the operation of the brake pedal 6 is performed. Is released, the pulling rod 12, the equalizer lever 13, and the plunger pushing arm 16 are returned to the non-operating direction by the elastic force of the shoe return spring of the rear wheel brake 3 and the spring member 23. When the communication port 15d is in a communication state and the operation of the brake lever 4 is further released, the hydraulic pressures of the front-wheel hydraulic pipe 8, the hydraulic chamber 20, and the hydraulic pipe 18 are returned to the first hydraulic master cylinder 11. .

  Since the present embodiment is formed as described above, both the brake lever 4 and the brake pedal 6 are operated, and when the plunger pushing arm 16 pushes the plunger 15, the working fluid in the hydraulic chamber 20 is discharged. Even if the plunger 15 moves in a pressurized state, the first cup seal 17a is mounted in the cylinder hole 14b, so there is no possibility that the first cup seal 17a will be eaten by the hydraulic pressure introduction hole 14d. The durability of the cup seal 17a can be improved.

  Further, the hydraulic pressure introduction hole 14d is provided between the pair of cup seals 17a and 17b, and the communication port 15d is formed in the plunger 15 for communicating the hydraulic pressure introduction hole 14d and the hydraulic pressure chamber 20 in the initial state of the plunger 15. As a result, the hydraulic pressure generated in the first hydraulic master cylinder 11 can be introduced into the hydraulic chamber 20 of the second hydraulic master cylinder 14 via the hydraulic pressure introduction hole 14d and the communication port 15d. Furthermore, the second hydraulic master cylinder 14 can be reduced in size. Further, since the hydraulic pressure introduction hole 14d and the union hole 14g are formed in the cylinder body 14a in parallel, the hydraulic pressure introduction hole 14d and the union hole 14g can be machined from the same direction, and the machining cost can be reduced. Can do.

  Further, in the master cylinder unit 7, a plunger push arm 16 is connected to one end via a first support shaft 24, and a rear wheel brake rod 9 for operating the rear wheel brake 3 is connected to the second support shaft 25 at the other end. The pulling rod 12 is connected to the brake pedal 6 at the intermediate portion, and is provided with an equalizer lever 13 connected via the third support shaft 26. The plunger pushing arm 16 and the second hydraulic pressure master cylinder 14 are connected to each other. Since the spring member 23 that urges the plunger pusher arm 16 in the counter-acting direction is provided between the cylinder body 14a and the plunger pusher arm 16 is not rattled. By changing the spring force or adjusting the amount of protrusion of the stopper bolt 19, the timing of the operation of the front wheel brake 2 with respect to the rear wheel brake 3 is shifted back and forth. Preparative it is, it is also possible to vary the braking force distribution, it is possible to suit the operating conditions and road conditions braking.

  FIGS. 6 to 11 show 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 second hydraulic master cylinder 32 of the master cylinder unit 31 of the present embodiment has a cylinder body 32a with a bottomed cylinder hole 32b and a large-diameter hole 32c continuous to the cylinder hole 32b provided coaxially. The hole 32b is fitted with a first cup seal 33a arranged with the lip portion 33c facing the cylinder hole bottom side and a second cup seal 33b arranged with the lip portion 33d facing the cylinder hole opening side. Has been.

  The plunger 34 includes a small-diameter shaft portion 34a that projects into the large-diameter hole 32c from the opening portion of the cylinder hole 32b, and a large-diameter shaft portion 34c that has a concave portion 34b that opens on the bottom side of the cylinder hole 32b. A first hydraulic chamber 35 is defined between the bottom of the first portion and the bottom of the recess 34b. A union hole 36a communicating with the first hydraulic pressure chamber 35 is formed at the bottom of the cylinder hole 32b, and the front wheel hydraulic pipe 8 is connected to the union hole 36a via a third union bolt 36. A communication hole 35b communicating with a reservoir (not shown) is formed between the first cup seal 33a and the second cup seal 33b in parallel with the union hole 36a. A plurality of communication ports 34d penetrating the inside and outside of the peripheral wall are formed in the peripheral wall of the concave portion 34b of the plunger 34, and the reservoir and the first hydraulic pressure chamber 35 communicate with each other via the communication port 34d. A return spring 37 is disposed between the bottom of the recess 34b and the bottom surface of the cylinder hole 32b to return the inoperative plunger 34 to a preset initial position.

  An annular collar member 40 is interposed between the outer periphery of the small-diameter shaft portion 34a of the plunger 34 and the inner peripheral surface of the large-diameter hole 32c via an inner peripheral side cup seal 38 and an outer peripheral side O-ring 39 serving as a sealing material. The collar member 40 is positioned by a circlip 41 attached to the inner periphery of the large-diameter hole 32c. The collar member 40 is liquid-tightly arranged with respect to the large-diameter hole 32c by an outer peripheral side O-ring 39 disposed on the outer peripheral side, and a plunger is provided by an inner peripheral side cup seal 38 provided on the inner peripheral side. The small-diameter shaft portion 34 a of 34 is inserted into the collar member 40 so as to be liquid-tight and movable.

  The initial position of the plunger 34 is set by the elastic force of the return spring 37 and the tip of the small-diameter shaft portion 34 a abuts against the plunger pushing portion 16 c of the plunger pushing arm 16. A second hydraulic pressure chamber 42 is defined between the step portion 34 e formed between the large-diameter shaft portion 34 c and the collar member 40.

  The cylinder body 32a of the second hydraulic pressure master cylinder 32 is formed with a hydraulic pressure introduction hole 43a that communicates with the second hydraulic pressure chamber 42. The hydraulic pressure introduction hole 43a is connected to the above-described fluid via a fourth union bolt 43. A hydraulic pipe 18 communicating with the first hydraulic master cylinder 11 is connected. Furthermore, a bleeder hole 44a is formed in the second hydraulic pressure chamber 42, and a brewer screw 44 is screwed into the bleeder hole 44a.

  When the brake lever 4 is operated, the bar handle vehicle brake device 1 of the present embodiment formed as described above has the first hydraulic master cylinder of the hydraulic master cylinder device 5 as shown in FIG. 11 is supplied to the second hydraulic pressure chamber 42 via the hydraulic pressure pipe 18 and the fourth union bolt 43. At this time, since the tip of the plunger 34 is positioned by the plunger pusher arm 16, the hydraulic pressure is supplied to the second hydraulic pressure chamber 42, and when the volume of the second hydraulic pressure chamber 42 is increased, the plunger 34 is moved. Move to the bottom of the cylinder hole. As a result, after the communication port 34d passes through the first cup seal 33a, a hydraulic pressure is generated in the first hydraulic pressure chamber 35, and the pressurized hydraulic fluid is supplied to the union hole 36a, the third union bolt 36, the front wheel fluid. The pressure is supplied to the caliper body 2b of the front wheel brake 2 through the pressure pipe 8, and the front wheel brake 2 is operated independently. At this time, the plunger pushing arm 16 does not rattle because it retains the initial state by the elastic force of the spring member 23 as described above.

  When the brake pedal 6 is operated, the traction rod 12 is pulled as in the first embodiment, and one end side of the equalizer lever 13 is in a state in which the initial position is maintained by the resilient force of the spring member 23. Accordingly, the position of the first support shaft 24 is fixed, the equalizer lever 13 rotates about the first support shaft 24, 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 FIG. 10, the equalizer lever 13 is further pulled, and one end side of the equalizer lever 13 is pulled against the elastic force of the spring member 23. Thereby, the plunger pushing arm 16 rotates around the pivot 22, the positioning arm 16 b is separated from the outer surface of the cylinder body 32 a, and the plunger pushing portion 16 c pushes the plunger 34. Along with this, when the plunger 34 moves to the bottom side of the cylinder hole 32b and the communication port 34d passes through the first cup seal 33a, hydraulic pressure is generated in the first hydraulic pressure chamber 35, and the pressurized hydraulic fluid is , Are supplied to the caliper body 2b of the front wheel brake 2 through the union hole 36a, the third union bolt 36, and the front wheel hydraulic pipe 8 to operate the front wheel brake 2 in conjunction with each other. Further, as shown in FIG. 11, after the rotation of the plunger pusher arm 16 is restricted by the contact between the tip of the stopper bolt 19 and the turn restricting arm 16 d of the plunger pusher arm 16, Is further operated, the equalizer lever 13 rotates about the first support shaft 24, the rear wheel brake rod 9 is pulled, and the rear wheel brake 3 is operated.

  Further, when both the brake lever 4 and the brake pedal 6 are operated, the hydraulic pressure from the first hydraulic master cylinder 11 is passed through the second hydraulic chamber 42 of the second hydraulic master cylinder 32 as described above. In addition to acting on the first hydraulic pressure chamber 35, the plunger pushing arm 16 pushes the plunger 34, acting on the first hydraulic pressure chamber 35, and the front wheel brake 2 is actuated.

  Further, by releasing the operation of the brake lever 4 from the state in which both the brake lever 4 and the brake pedal 6 are operated, the hydraulic pressure in the second hydraulic pressure chamber 42 and the hydraulic pressure pipe 18 is changed to the first hydraulic pressure master cylinder 11. When the operation of the brake pedal 6 is released, the traction rod 12, the equalizer lever 13, and the plunger pusher arm 16 are deactivated by the elastic force of the shoe return spring of the rear wheel brake 3 and the spring member 23. The hydraulic pressure in the front-wheel hydraulic pipe 8 and the first hydraulic chamber 35 is returned to the reservoir.

  The present invention is not limited to the above-described embodiments, and the structure of the hydraulic master cylinder device is arbitrary, and the structure of the front wheel brake and the rear wheel brake is also arbitrary. Further, the structure of the pulling rod and the equalizer lever of the master cylinder unit is also arbitrary, and the master cylinder unit may be provided with no equalizer lever.

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, 3 ... cam lever, 4 ... brake lever, 5 ... hydraulic master cylinder device, 6 ... brake pedal, 6a ... fixed shaft, 7 ... master cylinder unit, 8 ... hydraulic piping for front wheels, 8a ... second union bolt, 9 ... Rear wheel brake rod, 10 ... handlebar, 11 ... first hydraulic master cylinder, 11a ... bracket, 11b ... holder, 11c ... bolt, 12 ... traction rod, 13 ... equalizer lever, 14 ... second hydraulic master cylinder 14a ... Cylinder body, 14b ... Cylinder hole, 14c ... Liquid replenishment chamber, 14d ... Hydraulic pressure introduction hole, 14e ... Pushing arm Bracket, 14f ... bolt mounting bracket, 14g ... union hole, 14h ... outer surface, 15 ... plunger, 15a ... small diameter shaft portion, 15b ... concave portion, 15c ... large diameter shaft portion, 15d ... communication port, 16 ... plunger pushing arm, 16a ... Rotating base, 16b ... Positioning arm, 16c ... Plunger pushing part, 16d ... Rotation restricting arm, 17a ... First cup seal, 17b ... Second cup seal, 18 ... Hydraulic piping, 18a ... First union Bolt, 19 ... stopper bolt, 20 ... hydraulic chamber, 21 ... return spring, 22 ... pivot, 23 ... spring member, 24 ... first support shaft, 25 ... second support shaft, 26 ... third support shaft, 31 ... Master cylinder unit, 32 ... second hydraulic master cylinder, 32a ... cylinder body, 32b ... cylinder hole, 32c ... large diameter hole, 33a ... first cup seal, 3 b ... second cup seal, 33c, 33d ... lip portion, 34 ... plunger, 34a ... small diameter shaft portion, 34b ... concave portion, 34c ... large diameter shaft portion, 34d ... communication port, 34e ... step portion, 35 ... first liquid Pressure chamber, 35a ... Union hole, 35b ... Communication hole, 36 ... Third union bolt, 36a ... Union hole, 37 ... Return spring, 38 ... Inner peripheral side cup seal, 39 ... Outer peripheral side O-ring, 40 ... Collar member, 41 ... Circlip, 42 ... Second hydraulic chamber, 43 ... Fourth union bolt, 43a ... Hydraulic pressure introduction hole, 44 ... Breuder screw, 44a ... Breuder hole

Claims (3)

The hydraulic pressure generated in the first hydraulic master cylinder by operating one brake operator is supplied to the first brake via the second hydraulic master cylinder of the master cylinder unit, and the first brake is operated independently. And operating the second brake by operating the other brake operator, generating a hydraulic pressure in the second hydraulic master cylinder, supplying the hydraulic pressure to the first brake, In the brake device for a bar handle vehicle that operates in conjunction,
The master cylinder unit includes the second hydraulic pressure master cylinder, and a plunger pushing arm that pushes a plunger of the second hydraulic pressure master cylinder by operating the other brake operator.
The second hydraulic master cylinder is defined between a bottomed cylindrical cylinder hole fitted with a pair of cup seals, a plunger inserted in the cylinder hole, and the plunger and the bottom of the cylinder hole. A hydraulic chamber,
In the cylinder body of the second hydraulic master cylinder, a hydraulic pressure introduction hole for introducing the hydraulic pressure generated in the first hydraulic master cylinder into the hydraulic chamber is formed between the pair of cup seals. A union hole for supplying the hydraulic pressure of the hydraulic pressure chamber to the first brake is formed in parallel with the hydraulic pressure introduction hole;
The plunger is formed with a communication port for communicating the fluid pressure introducing hole and the fluid pressure chamber in an initial state of the plunger,
A hydraulic pipe connected to the first hydraulic master cylinder is connected to the hydraulic pressure introduction hole via a first union bolt, and a hydraulic pipe connected to the first brake is a second union. The bar handle vehicle brake device is connected to the union hole via a bolt. The hydraulic pressure generated in the first hydraulic master cylinder by operating one brake operator is supplied to the first brake via the second hydraulic master cylinder of the master cylinder unit, and the first brake is operated independently. And operating the second brake by operating the other brake operator, generating a hydraulic pressure in the second hydraulic master cylinder, supplying the hydraulic pressure to the first brake, In the brake device for a bar handle vehicle that operates in conjunction,
The master cylinder unit includes the second hydraulic pressure master cylinder, and a plunger pushing arm that pushes a plunger of the second hydraulic pressure master cylinder by operating the other brake operator.
The second hydraulic master cylinder includes a bottomed cylindrical cylinder hole fitted with a pair of cup seals, a plunger inserted into the cylinder hole, and a first hydraulic pressure provided on the bottom side of the cylinder hole. A chamber, a second hydraulic chamber provided on the opening side of the cylinder hole, and a hydraulic pressure introduction hole communicating with the second hydraulic pressure chamber, the first hydraulic pressure chamber through the hydraulic pressure introduction hole. When the hydraulic pressure generated in the hydraulic master cylinder is introduced into the second hydraulic pressure chamber, the plunger is pushed,
A hydraulic pipe connected to the first hydraulic master cylinder is connected to the hydraulic pressure introduction hole via a first union bolt, and a hydraulic pipe connected to the first brake is a second union. Connected to the union hole through a bolt,
It said second hydraulic chamber bar handle vehicle brake system, wherein the Buryuda hole Bureau d'screw is screwed is formed in the.   The other brake operator is a brake pedal, and the master cylinder unit has a first linkage in which one end of the plunger pusher arm is connected via a first support shaft and the other end is operated in the second brake. The means is connected via a second support shaft, and the second connecting means connected to the brake pedal at an intermediate portion comprises an equalizer lever connected via a third support shaft, and the plunger pusher arm and the first The bar handle vehicle brake according to claim 1 or 2, wherein a spring member is provided between the cylinder body of the two hydraulic master cylinder and urges the plunger pushing arm in the counter-acting direction. apparatus.

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