JP2006103437A - Bar handle vehicle brake system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate handling of a rod as a connecting means connected to a mechanical brake and to operate a brake pedal as a second brake operator in a good state.
SOLUTION: A master cylinder unit 12 has a hydraulic master cylinder 22 and a base end 23a pivotally attached to a cylinder hole opening side of a cylinder body 19, and a piston pushing portion 23b for pushing a piston 20 at an intermediate portion. The knocker 23 is composed of a rod 11 having a proximal end pivotally attached to the distal end portion of the knocker 23 and connected to the mechanical brake 9 at the distal end, and a rod connected to the second brake operator 6 at the intermediate portion. It is comprised with the equalizer 24 which connected the connection means 11b, respectively. A cylinder body includes a liquid introduction port 28 for introducing the hydraulic pressure generated by the first brake operator 4 into the cylinder hole via the hydraulic pipe 10b, and a pivot portion 19c for pivotally coupling the base end 23a of the knocker 23. 19 on the same side.
[Selection] Figure 1

Description

  The present invention relates to a brake device used in various bar handle vehicles such as motorcycles, motor tricycles, and three- and four-wheel buggy vehicles, and more specifically, a hydraulic brake is operated by a first brake operator and a second brake operation. The present invention relates to a bar-handle vehicle brake device having a structure in which both a hydraulic brake and a mechanical brake are operated in conjunction with each other.

  A brake device for a bar handle vehicle includes a hydraulic brake that is operated by a hydraulic pressure generated by a first brake operation element that includes an operation lever mounted on a handle bar, and a second brake that includes a brake pedal mounted on a vehicle body. A mechanical brake that is mechanically operated by an operating force of an operating element, and a hydraulic pressure from the first brake operating element is relayed to the hydraulic brake, and the hydraulic brake is operated by an operating force of the second brake operating element. And a master cylinder unit that generates a hydraulic pressure for operating the motor.

  The master cylinder unit includes a hydraulic master cylinder in which a piston is inserted into a cylinder hole formed in the cylinder body, and a hydraulic chamber is defined between the piston and the bottom wall of the cylinder hole, and a base end is pivoted on the cylinder body. A knocker having a piston pushing part for pushing and pushing the piston, and an equalizer pivotally supported at a tip on the anti-pivoting side of the knocker, and the cylinder body has a fluid communicating with the cylinder hole. An inlet is provided, and a hydraulic pipe connected to the first brake operator is connected to the liquid inlet, and a hydraulic pipe connected to the hydraulic brake is connected to the hydraulic chamber. The equalizer has a mechanical brake-side linking means connected to the tip of the cylinder body that protrudes toward the liquid inlet, and an intermediate portion connected to the second brake operator-side linking means.

In the brake device configured as described above, only the hydraulic brake is operated when the first brake operator is operated, and the mechanical brake and the hydraulic brake are operated in conjunction with each other when the second brake operator is operated. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 10-218071

  However, in the above-described case, when a brake pedal is used as the second brake operator, it is desired to connect the brake pedal and the equalizer with a rod in order to improve the operation feeling. Since the cylinder body is connected to the tip side protruding to the liquid inlet port side, it is difficult to route the rod so as not to interfere with the liquid inlet port.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a bar handle vehicle brake device that facilitates handling of a rod and can operate a brake pedal in a good state.

  In order to achieve the above object, according to the first aspect of the present invention, a hydraulic brake that is actuated by a hydraulic pressure generated by a first brake operation element including an operation lever mounted on a handlebar, and a brake pedal mounted on a vehicle body A mechanical brake that is mechanically operated by the operating force of the second brake operator, and relays the hydraulic pressure from the first brake operator to the hydraulic brake, and the operating force of the second brake operator And a master cylinder unit that generates a hydraulic pressure for operating the hydraulic brake, the master cylinder unit includes a piston inserted in a cylinder hole formed in a cylinder body, and the piston A hydraulic master cylinder with a hydraulic chamber defined between the bottom wall of the cylinder hole and the cylinder hole opening side of the cylinder body A knocker having a piston pushing part that pushes the piston at an intermediate part, and a connecting means having a proximal end pivotally attached to the tip part of the knocker and connected to the mechanical brake at the tip; And an equalizer that is connected to connecting means composed of rods that are connected to the second brake operator at the intermediate portion, and introduces the hydraulic pressure generated by the first brake operator into the cylinder hole via the hydraulic pipe. And a pivoting portion pivotally pivoting the base end of the knocker is provided on the same side of the cylinder body.

  In a second aspect of the invention, the master cylinder unit is mounted on the vehicle with the axis of the hydraulic master cylinder oriented horizontally, the fluid inlet is above the vehicle, and the tip of the equalizer is below the vehicle. It is characterized by being respectively arranged toward.

  According to the first invention, since the positions of the rod and the liquid introduction port are separated, the rod can be easily handled and the brake pedal can be operated in a good state.

  According to the second aspect of the present invention, there is no possibility that the liquid introduction port is damaged by a stepping stone or the like when the liquid introduction port faces upward of the vehicle. Further, since the connecting portion of the rod and the equalizer faces downward of the vehicle, the rod and the equalizer can be easily maintained.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view of a brake device for a bar handle vehicle, FIG. 2 is an explanatory diagram of a master cylinder unit when a mechanical brake is operated by operation of a second brake operator, and FIG. 3 is an operation of a second brake operator. It is explanatory drawing of a master cylinder unit when a hydraulic brake and a mechanical brake operate | move interlockingly.

  A brake device 1 for a bar handle vehicle is connected to a primary hydraulic master cylinder 3 and a first brake operator 4 attached to a steering handle bar 2 and a brake arm 5, and is supported on a vehicle body frame in a swingable manner. Second brake operating element 6, a hydraulic brake 8 for braking the front wheel pivotally supported at the lower end of the front fork 7, and a machine for braking the rear wheel pivotally supported at the rear end of the swing arm Brake 9, hydraulic pipe 10 connecting the primary hydraulic master cylinder 3 and hydraulic brake 8, connecting means 11 connecting the second brake operator 6 and mechanical brake 9, and hydraulic pipe 10 And a master cylinder unit 12 interposed between the connecting means 11.

  An operation lever is used for the first brake operator 4, a brake pedal is used for the second brake operator 6, and a rod is used as the connecting means 11 for connecting the second brake operator 6 and the mechanical brake 9. ing. A disc brake including a disc rotor 13 and a caliper body 14 is applied to the hydraulic brake 8, and a hydraulic pipe 10 a that is divided to the hydraulic brake side by the interposition of the master cylinder unit 12 is applied to the caliper body 14. It is connected. The mechanical brake 9 has a pair of brake shoes 15, 15 facing each other in the back plate. A type drum brake is applied, and a cam lever 18 having one end fixed to the camshaft 16 is connected to a connecting means 11a divided to the mechanical brake side by the interposition of the master cylinder unit 12.

  In the master cylinder unit 12, a piston 20 is liquid-tightly inserted into a bottomed cylinder hole 19a provided at one end of the cylinder body 19, and a liquid is interposed between the piston 20 and a bottom wall 19b of the cylinder hole 19a. A secondary hydraulic master cylinder 22 defining a pressure chamber 21; a knocker 23 having a base end 23a pivotally attached to the cylinder body 19 and pushing a piston; It equips with the equalizer 24 pivotally supported at the front-end | tip used as the pivot attachment side.

  A relief port 25 and a supply port 26 are provided on the peripheral wall of the cylinder body 19 so as to communicate with the cylinder hole 19a. A liquid introduction port 28 is provided on the cover plate 27 attached to the cylinder body 19 with the relief port 25 and the relief port 25. A fluid pressure pipe 10 b on the first brake operator side is connected to the fluid inlet 28. A fluid supply port 29 is provided in the bottom wall 19 b of the cylinder body 19 so as to communicate with the fluid pressure chamber 21, and a fluid pressure piping 10 a on the hydraulic brake side is connected to the fluid supply port 29.

  A return spring 30 is contracted between the piston 20 of the hydraulic chamber 21 and the bottom wall 19b of the cylinder hole 19a. When the piston 20 is not operated, the opening of the cylinder hole 19a is caused by the elastic force of the return spring 30. The rearward limit is restricted by contact with the retaining ring 31 engaged with the opening of the cylinder hole 19a.

  On the cylinder hole opening side of the cylinder body 19 and on the same side as the liquid introduction port 28, a pivoting portion 19c is provided, and the base end 23a of the knocker 23 is a first support shaft on the pivoting portion 19c. It is pivotally supported by 32. In the knocker 23, a piston pushing portion 23 b and a spring support portion 23 c are projected in order from the base end 23 a side toward the cylinder body side, and at the tip that protrudes toward the counter liquid inlet side of the cylinder body 19. The proximal end of the equalizer 24 is pivotally supported by the second support shaft 33.

  The equalizer 24 has a connecting means 11a connected to the mechanical brake 9 at the tip, and a connecting means 11b connected to the second brake operator 6 attached to the middle part. On the opening side of the cylinder body 19 and on the anti-liquid inlet side, a mounting piece 19d is projected, and an adjustment bolt 34 is projected on the mounting piece 19d in the cylinder axial direction. A delay spring 35 is disposed between the spring support 23c and the spring support 23c. As shown in FIG. 1, the knocker 23 and the equalizer 24 when not in operation are continuous in a straight line, and the piston pushing portion 23b of the knocker 23 protrudes from the opening of the cylinder hole 19a. Is in contact with

  Reference numerals 36 and 36 are cup seals fitted to the hydraulic pressure chamber side and the counter hydraulic pressure chamber side of the piston 20, 37 is a replenishing liquid chamber defined between the cup seals 36 and 36, 38 and 38, respectively. These are a pair of shoe return springs stretched between the brake shoes 15, 15 of the mechanical brake 9.

  The brake device 1 of the present embodiment is configured as described above, and the master cylinder unit 12 is mounted on the vehicle with the axis of the secondary hydraulic master cylinder 22 oriented in the horizontal direction, and the liquid inlet 28 is provided. Are arranged above the vehicle and the tip of the equalizer 24 is arranged below the vehicle.

  Each component is in the state shown in FIG. 1 when the first and second brake operators 4 and 5 are not operated. In the secondary hydraulic master cylinder 22 of the master cylinder unit 12, the liquid inlet 28 and The fluid pressure chamber 21 communicates with the relief port 25, and the fluid introduction port 28 and the replenishment fluid chamber 37 communicate with each other via the supply port 26.

  When only the first brake operation element 4 is operated, the hydraulic pressure generated in the primary hydraulic pressure master cylinder 3 passes through the hydraulic pressure pipe 10b on the first brake operation element side and the liquid pressure in the secondary hydraulic pressure master cylinder 22 is reached. It enters the inlet 28 and is further supplied from the relief port 25 to the hydraulic pressure chamber 21 and from the supply port 26 to the replenishing fluid chamber 37. The brake fluid supplied to the replenishing fluid chamber 37 is supplied to the hydraulic pressure chamber 21 from the back side of the cup seal 36 (the replenishing fluid chamber 37 side, that is, the upstream side of the one-way flow permitted by the cup seal 36). As a result, the hydraulic pressure supplied to the hydraulic chamber 21 passes through the hydraulic chamber 21 as it is, and is supplied from the hydraulic piping 10 a on the hydraulic brake side to the caliper body 14 of the hydraulic brake 8. Is hydraulically operated alone.

  When the second brake operator 6 is operated, first, as shown in FIG. 2, the second brake operator-side linking means 11b pulled by the second brake operator 6 causes the equalizer 24 to 2 The pivot 33 is pivoted about the fulcrum, and the knocker 23 is not pivoted by the spring force of the delay spring 35. Thereby, the equalizer 24 pulls the connecting means 11a on the mechanical brake side and rotates the cam lever 18 to operate the mechanical brake 9. When the second brake operator 6 is further operated from this state, the knocker 23 and the equalizer 24 are integrated with the first support shaft 32 as a fulcrum against the spring force of the delay spring 35 as shown in FIG. The piston pusher 23b of the knocker 23 pushes the piston 20 of the secondary hydraulic pressure master cylinder 22 to operate the mechanical brake 9, and the secondary hydraulic pressure master cylinder pushed by the knocker 23 is rotated. After the piston 20 of 22 advances the cylinder hole 19a toward the hydraulic chamber at the bottom and cuts off the communication between the relief port 25 and the hydraulic chamber 21, a hydraulic pressure is generated in the hydraulic chamber 21 to generate a hydraulic pressure. The hydraulic brake 8 is hydraulically operated through the hydraulic pipe 10a on the brake side. The rotation of the knocker 23 is restricted by the contact between the tip of the adjustment bolt 34 and the spring support portion 23c, and the amount of rotation of the knocker 23 is adjusted by adjusting the amount of protrusion of the adjustment bolt 34 from the mounting piece 19d. Can be adjusted.

  When both the first brake operator 4 and the second brake operator 6 are operated, the hydraulic pressure from the primary hydraulic master cylinder 3 acts on the cylinder hole 19a of the secondary hydraulic master cylinder 22, and the The pressing force of the knocker 23 acts on the piston 20 of the next hydraulic pressure master cylinder 22. When the pressing force from the knocker 23 is larger than the hydraulic pressure from the primary hydraulic master cylinder 3, the knocker 23 and the equalizer 24 rotate together as described above, and the equalizer 24 is mechanically braked. At the same time as the mechanical brake 9 is pulled through the connecting means 11 a and the cam lever 18, the knocker 23 pushes the piston 20, and the hydraulic brake 8 is moved to the hydraulic chamber 21 of the secondary hydraulic master cylinder 22. It is activated by the hydraulic pressure generated in

  On the other hand, when the hydraulic pressure from the primary hydraulic master cylinder 3 is larger than the pressing force from the knocker 23, the hydraulic pressure from the primary hydraulic master cylinder 3 prevents the rotation of the knocker 23 and the advance of the piston 20. While passing through the hydraulic chamber 21 as it is, the hydraulic brake 8 is hydraulically operated. Further, in the lever mechanism 20 in which the rotation of the knocker 23 is prevented, only the equalizer 24 is rotated about the second support shaft 33 by the traction force of the second brake operation element 6, and the mechanical brake 9 is operated.

  When the operation of the first brake operator 4 is released, the hydraulic pressure in the hydraulic pressure chamber 21 of the hydraulic pressure pipe 10 and the secondary hydraulic pressure master cylinder 22 is returned to the primary hydraulic pressure master cylinder 3, and the second When the operation of the brake operator 6 is released, the linking means 11 and the lever mechanism 20 are pulled in the mechanical brake direction by the elastic force of the shoe return springs 38 and 38 and the delay spring 35 of the mechanical brake 9. Return to the indicated state.

  In this embodiment, by changing the spring force of the delay spring 35, the operation timing of the hydraulic brake with respect to the mechanical brake can be shifted back and forth, and the braking force distribution can be changed. Depending on the road and road conditions, braking can be performed. Further, since the liquid inlet 28 is provided on the upper wall of the cylinder body 19 and the tip of the equalizer 24 is disposed so as to protrude below the cylinder body 19, the second brake operator 6 is a brake pedal. In addition, the connecting means 11b connected to the second brake operator 6 and the connecting means 11a connected to the mechanical brake 9 can be favorably routed. Further, since the connecting means 11a and 11b are formed of rods, the operation feeling of the brake pedal is improved. Further, since the liquid introduction port 28 faces upward of the vehicle, there is no possibility that the liquid introduction port 28 is damaged by a stepping stone or the like, and the connecting portion of the connecting means 11a, 11b and the equalizer 24 faces downward of the vehicle. The connecting means 11a and 11b and the equalizer 24 can be easily maintained.

  The hydraulic brake may be a drum brake using a wheel cylinder, and a disc brake of a type in which a piston is pushed by a mechanical mechanism may be used as a mechanical brake.

It is the schematic of the brake device for bar handle vehicles which shows one example of this invention. It is explanatory drawing of a master cylinder unit when a mechanical brake act | operates by operation of the 2nd brake operator. It is explanatory drawing of a master cylinder unit when a hydraulic brake and a mechanical brake act | operate interlockingly by operation of the 2nd brake operator.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Brake device, 2 ... Handle lever, 3 ... Primary hydraulic master cylinder, 4 ... 1st brake operator, 6 ... 2nd brake operator, 8 ... Hydraulic brake, 9 ... Mechanical brake, 10 ... Hydraulic pressure 11, connecting means, 12, master cylinder unit, 13, disc rotor, 14, caliper body, 19, cylinder body, 19 a, cylinder hole, 19 b, bottom wall, 19 c, pivoting portion, 19 d, mounting piece, 20 ... Piston, 20a ... Outer end, 21 ... Hydraulic chamber, 22 ... Secondary hydraulic master cylinder, 23 ... Knocker, 23a ... Base end, 23b ... Piston pushing part, 23c ... Spring support part, 24 ... Equalizer, 25 ... Relief port, 26 ... Supply port, 28 ... Liquid introduction port, 29 ... Liquid supply port, 30 ... Return spring, 31 ... Retaining ring, 32 ... First support shaft, 33 ... Second support shaft 34 ... adjustment bolt, 35 ... delay spring 36 ... cup seal, 37 ... supply fluid chamber, 38 ... shoe return spring

Claims (2)

Mechanically operated by a hydraulic brake that is operated by a hydraulic pressure generated by a first brake operation element including an operation lever mounted on a handlebar and a second brake operation element including a brake pedal mounted on a vehicle body. A mechanical brake that operates and a master that relays the hydraulic pressure from the first brake operator to the hydraulic brake and generates hydraulic pressure that activates the hydraulic brake by the operating force of the second brake operator In the brake device for a bar handle vehicle including the cylinder unit, the master cylinder unit includes a piston inserted in a cylinder hole formed in the cylinder body, and a hydraulic chamber is defined between the piston and a bottom wall of the cylinder hole. The base end of the hydraulic master cylinder is pivotally attached to the cylinder hole opening side of the cylinder body, and the piston is pushed in the middle. A knocker having a piston pushing part, and a connecting means connected to the mechanical brake at the distal end of the knocker at a distal end of the knocker, and a rod connected to the second brake operator at an intermediate part. Each of the connecting means is connected to each other, and a liquid introduction port for introducing the hydraulic pressure generated by the first brake operator into the cylinder hole through the hydraulic piping and a proximal end of the knocker are pivotally attached. A brake device for a bar handle vehicle, characterized in that a pivot mounting portion is provided on the same side of the cylinder body. The master cylinder unit is mounted on the vehicle with the axis of the hydraulic master cylinder oriented horizontally, and the liquid inlet is disposed above the vehicle and the front end of the equalizer is disposed below the vehicle. The bar handle vehicle brake device according to claim 1, wherein:

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