JPH1134961A - Parking brake mechanism of interlocking brake device for bar handle vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent liquid pressure from being applied to the piston cup or seals such as the angular seal of a hydraulic brake or a hydraulic master cylinder to accelerate deterioration at the time of a parking brake when the parking brake is provided on an interlocking brake device for a bar handle vehicle combined with a hydraulic brake and a mechanical brake. SOLUTION: A hydraulic brake is used for a front wheel brake 3, and a mechanical brake is used for a rear wheel brake 5. A cable actuator 17 is provided between a hydraulic pipe 15 and a linking means 16, and a rack 18 is provided in the linking means 16. A coupling pawl 19 coupled with a one- direction tooth 18a and regulating the return of the linking means 16 operated in the towing direction is provided near the rack 18. A parking brake operating piece 11 is provided on a handle bar 6, and the parking brake operating piece 11 and the coupling pawl 19 are connected by a linking means 21. A spindle 50 is provided with an exciting means 51 exciting the coupling pawl 19 in the releasing direction from the one-direction tooth 18a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic brake and a mechanical brake applied to a front wheel brake and a rear wheel brake of various bar handle vehicles such as motorcycles and three-wheeled vehicles. Expression brake,
An interlocking brake device for a bar handle vehicle that is operated in conjunction with one brake operator, wherein the interlocking brake device for a bar handle vehicle uses a mechanical brake to maintain the parking state of the bar handle vehicle. It relates to a parking brake mechanism.

[0002]

2. Description of the Related Art An interlocking brake device for a bar handle vehicle is disclosed in, for example, Japanese Patent Application Laid-Open No. 9-99830. This interlocking brake device employs a highly productive hydraulic disc brake for the front wheel brake of a bar handle vehicle, and is a relatively inexpensive rear wheel brake that can be accommodated on small wheels such as scooters. Adopting a drum brake, the hydraulic disc brake has
The hydraulic master cylinder integrated with the brake operator is connected by hydraulic piping, and the mechanical drum brake is connected to connecting means such as a wire cable and a rod, and is connected to the connecting means and the hydraulic master cylinder. And a hydraulic line via a cable actuator.

[0003] The hydraulic pressure generated in the hydraulic master cylinder by the operation of the brake operator enters the hydraulic pipe for the front wheel to directly operate the hydraulic disc brake, and a part of the hydraulic pipe for the rear wheel. To be supplied to the cable actuator. In the cable actuator, the hydraulic operating force is converted into a mechanical traction force, and the connecting means connected to the cable actuator is pulled to operate the mechanical drum brake.

[0004]

In recent years, motorcycles and tricycles have been proposed which include a parking brake capable of holding a brake state even when parking (see, for example, Japanese Utility Model Laid-Open No. 53-11156). There is no bar-handled vehicle provided with a parking brake using the interlocking brake device as described above.

Accordingly, the present invention provides a parking brake in an interlocking brake device in which a hydraulic brake and a mechanical brake are combined with front and rear wheel brakes. The hydraulic brakes continue to operate and the seals such as the piston cups, square seals and O-rings used in the hydraulic brakes and hydraulic master cylinders are constantly subjected to hydraulic pressure to accelerate the deterioration. The purpose was to develop an inexpensive parking brake mechanism for an interlocking brake device for bar handle vehicles that does not impair the durability of seals.

[0006]

SUMMARY OF THE INVENTION According to the present invention, one of the front wheel brake and the rear wheel brake of a bar handle vehicle is operated by the hydraulic pressure of a hydraulic master cylinder operated by a brake operator. With the hydraulic brake to be actuated, the other as a mechanical brake towed by a connecting means such as a wire cable or a rod, the connecting means,
A cable actuator for converting a hydraulic operating force from the hydraulic master cylinder into a mechanical traction force is interposed between a hydraulic pipe connected to the hydraulic master cylinder and a mechanical coupling means with the cable actuator. In a bar-handle vehicle interlocking brake device that constitutes a mechanical operating mechanism with a brake and operates both a hydraulic brake and a mechanical brake by operating the brake operator, a rack is provided in the mechanical operating mechanism. An engaging claw is provided in the vicinity of the rack to engage with the one-way teeth of the rack to restrict return of the connecting means operated in the towing direction, and a parking brake operator is provided on the body of the bar handle vehicle. The parking brake operator and the engaging claw are connected by connecting means such as a wire cable or a rod, and the engaging claw is It is characterized by comprising biasing means for biasing the direction away from the direction the teeth.

[0007] The brake operator and the parking brake operator may be either a lever or a pedal.
It can be mounted on any of the vehicle bodies as long as it can be operated by the rider. The rack in the mechanical operating mechanism may be interposed in the wire cable or rod of the connecting means or provided directly on the rod, or may be provided in the cable actuator or mechanical brake. As the urging means of the engaging claw, springs such as a helical spring, a coil spring, and a leaf spring,
There are elastic materials such as rubber and soft synthetic resin.

[0008] In the parking brake mechanism of the present invention configured as described above, when the parking brake operation element is not operated and the parking claws are not operated, the engaging claw is disengaged from the one-way teeth of the rack by the urging force of the urging means. Normal operation of the mechanical brake by operation of the brake operator is permitted.

When a parking brake is applied to a bar-handled vehicle, the brake operator of the interlocking brake device is once operated to operate both the hydraulic brake and the mechanical brake to brake the front and rear wheels. I do. On the rear wheel brake side, the linking means of the mechanical operating mechanism operates in the towing direction integrally with the rack, and when the parking brake operator is operated while the brake operator is operated, the linkage connected to the parking brake operator is operated. The means is pulled so that the engaging pawl enters between the one-way teeth of the rack.

When the operation of the brake operator is released while the parking brake operator is being operated, the hydraulic brake and the hydraulic master cylinder return to a non-operating state. The connecting means of the mechanism and the rack are slightly returned in the anti-traction direction, and one of the one-way teeth of the rack is frictionally engaged with the engaging claw, and is connected by the engagement between the engaging claw and the one-way tooth. By restricting the return of the means, the operating state of the mechanical brake is maintained.

The engagement state between the engagement claw and the one-way tooth is maintained even after the operation of the parking brake operation member is released,
The mechanical brake is continuously operated, and the parking brake is applied to the front wheel or the rear wheel to which the mechanical brake is applied.

In order to release the parking brake, the brake operating member is operated to once operate the linking means of the mechanical operating mechanism and the rack in the towing direction. The direction teeth are separated from the engagement claws, and the engagement claws are separated from the one-way teeth by the urging force of the urging means. Thereafter, when the operation of the brake operating member is released, the linking means of the mechanical operating mechanism returns in the anti-traction direction, the braking of the front wheel or the rear wheel by the mechanical brake is released, and the bar handle vehicle is in a running state. Become.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an interlocking brake device for a motorcycle will be described below with reference to the drawings. The motorcycle 1 includes a front wheel brake 3 at a lower end of a front fork 2 and a rear wheel brake 5 at a rear end of a swing arm 4, and a grip 7 is provided at a left end of a handle bar 6 connected to an upper end of the front fork 2. Have been.

A hydraulic master cylinder 8 is fixed to the handlebar 6 in the vicinity of a grip 7, and an interlocking brake operator 10 and a parking brake operator 11 are mounted on a lever bracket 9 of the hydraulic master cylinder 8. The front and rear wheels (not shown) are braked by an interlocking brake device 12 that interlocks the front wheel brake 3 and the rear wheel brake 5 with the operation of the brake operator 10 when the motorcycle 1 is parked. A parking brake mechanism 13 that holds the rear wheel brake 5 in an activated state with a parking brake operator 11 brakes the rear wheels.

The interlocking brake device 12 includes the front wheel brake 3
And the rear wheel brake 5, the hydraulic master cylinder 8, the brake operator 10, the hydraulic piping 14, 15 and the connecting means 16 and the cable actuator 17, and the parking brake mechanism 13 is provided with the above-described interlocking brake device. In addition to using the components 12, the parking brake operating element 11 and the rack 18, the engaging claws 19, the bracket 20, and the dedicated parts of the connecting means 21 are provided.

The front wheel brake 3 has a disk rotor 30
A hydraulic disc brake in which the caliper body 31 and the caliper body 31 are combined is used, and the caliper body 31 and the hydraulic master cylinder 8 are connected by the hydraulic pipe 14. The rear wheel brake 5 has a pair of bow-shaped brake shoes 33, 33 opposed to each other in a back plate 32, and both brake shoes 33, 33 are expanded around the anchor pin 35 by the rotation of the cam shaft 34. An inwardly expanding mechanical drum brake is used, and the connecting means 16 is connected to a cam lever 36 having one end fixed to the cam shaft 34. An operating lever is used for the brake operator 10 and the parking brake operator 11, and a wire cable is applied to each of the linking means 16 and 21.

A hydraulic line 15 for a rear wheel brake is connected to an intermediate portion of the hydraulic line 14, and a cable actuator 17 is interposed between the hydraulic line 15 and the connecting means 16. The cable actuator 17 has a stepped piston 4 in a cylinder hole 41 in a cylinder body 40.
2, the large-diameter shaft portion 42a and the medium-diameter shaft portion 42b are inserted, and the hydraulic pressure chamber 43 is formed between the medium-diameter shaft portion 42b and the cylinder hole 41.
Atmosphere chambers 44 are respectively defined on the distal end side of the large-diameter shaft portion 42a, and the small-diameter shaft portion 42c of the stepped piston 42 is drawn into the cylinder hole 41 by the hydraulic pressure supplied to the hydraulic pressure chamber 43. The hydraulic operating force from the hydraulic master cylinder 8
Hydraulic cylinders of the piston retraction type that convert to mechanical traction are used.

The input port 45 communicating with the hydraulic chamber 43 is connected to the hydraulic pipe 15, and the distal end of the small-diameter shaft portion 42c protruding from the cylinder hole 41 is connected to the connecting means 16 for connecting the rear wheel brake 5 and The cable actuator 17 and the connecting means 16 constitute a mechanical operating mechanism 46.

Atmosphere chamber 44 of cable actuator 17
The piston return spring 47 is contracted, and the stepped piston 42 causes the small-diameter shaft portion 42c to protrude from the cylinder hole 41 by the elastic force of the piston return spring 47,
It is urged in the non-operation direction to reduce the hydraulic chamber 43. A rack 18 of the parking brake mechanism 13 is interposed in the linking means 16, and the linking means 16 and the rack 18
The biasing force of the shoe return springs 37, 37 of the rear wheel brake 5 and the lever return spring 38 always acts in the anti-traction direction (rear wheel brake direction) of the connecting means 16, and the rear wheel brake 5
Between the cam lever 36 and the stepped piston 42 of the cable actuator 17 without slack.

The rack 18 is slidably supported by a guide hole 20a of a bracket 20 fixed to the vehicle body, and has a plurality of one-way teeth 18a engraved on one side surface. A leg 20b is protruded from the bracket 20, and an engaging claw 19 is pivotally supported on the leg 20b by a support shaft 50. The tip of the engaging claw 19 has a one-way tooth 18 on a rack 18.
A hook 19a that engages with and disengages from a is provided, and a connecting means 21 of the parking brake mechanism 13 is connected to a base end of the engaging hook 19. A biasing means 51 using a helical spring is provided on the support shaft 50, one end of which is locked to the engaging claw 19, and the other end of which is locked to the leg piece 20 b. hand,
The engaging claws 19 are moved from the one-way teeth 18 a of the rack 18 to the pawl pieces 19.
a is urged in the direction in which it is separated (counterclockwise in FIGS. 1 and 2).

The parking brake operator 11 is superimposed on the upper surface of the brake operator 10, is pivotally supported on the lever bracket 9 together with the brake operator 10 by a pivot 52, and is disposed rotatably forward of the grip 7. Have been. On the vehicle body front side of the parking brake operator 11,
The linking means 21 of the parking brake mechanism 13 inserted into the lever bracket 9 is connected, and the parking brake operating element 11 limits the retreat limit in the non-operation direction by the tension of the linking means 21 connected to the engaging claw 19. It is regulated by contact with the lever bracket 9.

The present embodiment is configured as described above. When the motorcycle 1 is traveling, the interlocking brake device 12
1 and the parking brake mechanism 13 are in the inoperative state shown in FIG.
Is driven by the urging force of the urging means 50,
Are disengaged from the one-way teeth 18a of the rack 18, and free sliding of the rack 18 is allowed.

In normal braking using the interlocking brake device 12, the hydraulic pressure generated in the hydraulic master cylinder 8 by the gripping operation of the brake operator 10 is transmitted to the hydraulic piping 14.
To the caliper body 31 of the front wheel brake 3, and the hydraulic operation of the caliper body 31 brakes the front wheels.

A part of the hydraulic pressure generated by the hydraulic master cylinder 8 is passed through the hydraulic piping 15 to the cable actuator 1.
7 and supplied to the hydraulic chamber 43 from the input port 45. The hydraulic pressure supplied to the hydraulic chamber 43 is
2 is pushed toward the atmosphere chamber 21, the small-diameter shaft 42c is drawn into the cylinder hole 41, and the linking means 16 of the mechanical operating mechanism 46 is pulled together with the rack 18 to the left in FIG. Operate.

By this pulling, the cam lever 36 of the rear wheel brake 5 rotates clockwise in FIG. 1 integrally with the cam shaft 34, and the cam shaft 34 expands the brake shoes 33, 33 around the anchor pin 35 as a fulcrum. Open, brake shoes 33, 33
The rear wheels are braked by sliding the outer linings 33a, 33a in sliding contact with the inner peripheral surface of a brake drum (not shown).

When the motorcycle 1 is parked using the parking brake mechanism 13, the brake operator 10 of the interlocking brake device 12 is once squeezed to operate both the front wheel brake 3 and the rear wheel brake 5. Then, the front and rear wheels are braked. Next, when the parking brake operator 11 is gripped and operated while the gripping state of the brake operator 10 is maintained, the linking means 21 is pulled, and the engaging claw 19 is rotated clockwise in FIG. The one-way teeth 18a of the rack 18 which is rotated and the claw pieces 19a of the engagement claws 19 are operated together with the linking means 16 of the mechanical operating mechanism 46 in the towing direction.
Get in between.

When the gripping operation of the brake operator 10 is released while the gripping state of the parking brake operator 11 is maintained, the front wheel brake 3 and the hydraulic master cylinder 8 return to a non-operating state, and the rear wheel brake Also on the fifth side, the linking means 16 of the mechanical operating mechanism 46 is slightly returned in the anti-traction direction by the biasing force of the shoe return springs 37, 37 of the rear wheel brake 5 and the lever return spring 38, and the one-way teeth 18a of the rack 18 Is frictionally engaged with the claw piece 19a, the return of the connecting means 16 is restricted, and the operating state of the rear wheel brake 5 is maintained.

The engagement state between the pawl piece 19a and the one-way tooth 18a is maintained even after the operation of the parking brake operator 11 is released, and the rear brake 5 is continuously operated to apply the parking brake to the rear wheel. (The state of FIG. 2).

In order to release the above-mentioned parking brake state, the brake operator 10 is once squeezed and operated.
When the linking means 16 of the mechanical operation mechanism 46 and the rack 18 are operated in the towing direction, the one-way teeth 18a engaged with the claw pieces 19a are separated from the claw pieces 19a, and the engaging claws 19 are biased by the urging means. The lever 51 rotates counterclockwise in FIG. 1 by the urging force and returns to the inoperative position in FIG. And brake operator 1
When the gripping operation is released, the linking means 16 of the mechanical operating mechanism 46 and the rack 18 return in the anti-traction direction, the braking of the rear wheels by the rear wheel brake 5 is released, and the motorcycle 1
Becomes a runnable state.

As described above, according to the parking brake mechanism 13 of this embodiment, both the front wheel brake 3 using the hydraulic disc brake and the rear wheel brake 5 using the mechanical drum brake are operated by the brake operator 10. The parking brake uses only the mechanical rear wheel brake 5 for the parking brake, so that the caliper body 31 and the hydraulic master cylinder 8 of the front wheel brake 3 do not operate during the parking brake. In this state, the caliper body 31 and the hydraulic master cylinder 8
Since unnecessary fluid pressure is not applied to seals such as a piston cup, a square seal, and an O-ring, deterioration of the seals can be prevented and durability can be kept good.

Further, the parking brake mechanism 13 of this embodiment has a small number of parts, so that the manufacturing cost can be kept low, and the configuration is simple, so that the durability and reliability can be improved. .

The rack of the parking brake mechanism is
It may be provided in any of the cable actuator and the linking means and the rear wheel brake that constitute the mechanical operating mechanism.For example, in the case of the cable actuator having a shape such as the hydraulic master cylinder shown in the embodiment, the piston protrudes from the cylinder body. It can also be provided directly on the shaft. In the interlocking brake device, a hydraulic drum brake and a mechanical disc brake may be combined, and a hydraulic brake and a mechanical brake may be used for the front wheel brake and the rear wheel brake in a manner opposite to the above embodiment. May be set.

[0033]

According to the present invention, a combination of a hydraulic brake and a mechanical brake is applied to a front wheel brake and a rear wheel brake of a bar handle vehicle operated by one brake operator, and the system is connected to a mechanical brake. Between a connecting means such as a wire cable or a rod and a hydraulic pipe connected to the hydraulic master cylinder, a cable actuator for converting the hydraulic operating force from the hydraulic master cylinder into a mechanical traction force is interposed, A mechanical actuating mechanism is constituted by the cable actuator, the linking means, and the mechanical brake, and a rack is provided in the mechanical actuating mechanism. An engaging claw for restricting return of the connecting means that has been operated to is provided, a parking brake operator is provided on the body of the bar handle vehicle, and the parking brake operator and the parking brake operator are provided. A coupling means such as a wire cable or a rod is connected to the engaging claw, and a biasing means for biasing the engaging claw in a direction to separate from the one-way teeth of the rack is provided. Since only the mechanical brake is used, the hydraulic brake and the hydraulic master cylinder during the parking brake remain inactive, and the hydraulic brake and the hydraulic master cylinder's piston cup, square seal, O-ring, etc. Since unnecessary liquid pressure is not applied to the seals, the deterioration of the seals can be prevented and the durability can be kept good.

Further, the parking brake mechanism of the present invention has a small number of parts, so that the manufacturing cost can be kept low, and the configuration is simple, so that the durability and reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of an inoperative state of an interlocking brake device for a bar handle vehicle showing an embodiment of the present invention.

FIG. 2 is a schematic view showing an operation state of an interlocking brake device for a bar handle vehicle showing one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Motorcycle 3 ... Front wheel brake using hydraulic disc brake 5 ... Rear wheel brake using mechanical drum brake 6 ... Handlebar 8 ... Hydraulic master cylinder 10 ... Brake operator 11 ... Parking brake operator 12 ... Interlocking brake device 13 ... Parking brake mechanism 14, 15 ... Hydraulic piping 16 ... Connection means 17 ... Cable actuator 18 ... Rack 18a ... One-way tooth 19 ... Engagement claw 19a ... Claw piece 20 ... Bracket 20a ... Guide hole 21 ... Connection Means 30 Disc rotor 31 Caliper body 33 Brake shoe 34 Camshaft 36 Cam lever 37 Shoe return spring 38 Lever return spring 40 Cylinder body 41 Cylinder hole 42 Stepped piston 46 Mechanical actuation mechanism 51 … Biasing means

Claims (1)

[Claims] 1. One of a front wheel brake and a rear wheel brake of a bar handle vehicle is provided with a hydraulic brake operated by hydraulic pressure of a hydraulic master cylinder operated by a brake operator, and the other is provided by a wire cable or the like. As a mechanical brake pulled by a connecting means such as a rod, a hydraulic operating force from a hydraulic master cylinder is mechanically applied between the connecting means and a hydraulic pipe connected to the hydraulic master cylinder. By interposing a cable actuator that converts it into dynamic traction,
In a bar-handle vehicle interlocking brake device, a mechanical operating mechanism is configured by the cable actuator, the linking means, and the mechanical brake, and both the hydraulic brake and the mechanical brake are operated by operating the brake operator. A rack is provided in a mechanical operating mechanism, and near the rack,
Engaging with the one-way teeth of the rack, providing an engagement claw for restricting return of the linking means operated in the towing direction, providing a parking brake operator on the body of the bar handle vehicle,
The parking brake operator is connected to the engaging claw by a connecting means such as a wire cable or a rod, and biasing means is provided for biasing the engaging claw in a direction to be disengaged from the one-way teeth of the rack. A parking brake mechanism for an interlocking brake device for a bar handle vehicle.