JPH08104280A - Front-rear interlocking brake device for vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] The front wheel braking means can be operated in response to the operation of the front wheel brake operator, and the rear wheel and front wheel braking means can be operated in conjunction with the operation of the rear wheel brake operator. In a front-rear interlocking brake device for a vehicle, it is possible to avoid an excessive braking force of the front wheel braking means when the front and rear wheel brake operators are simultaneously braked. [Structure] A movable member 67 capable of moving within a limited range.
Rear wheel of in the rotatably mounted gear wheel 68, is wound around the operation force transmission cord 44 for connecting the front-wheel brake operation element 15 and the front wheel braking means B _F, during braking by the rear wheel braking means B _R A reaction force transmission member 80 that transmits the braking reaction force is connected to the movable member 67 on the side that moves the movable member 67 in a direction in which the tension of the operation force transmission rope 44 increases as the rear wheel braking reaction force increases. To be done.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front wheel braking means for braking a front wheel, a rear wheel braking means for braking a rear wheel, a front wheel brake operator for actuating the front wheel braking means in response to a brake operation, and a brake. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front-rear interlocking brake device for a vehicle including a rear-wheel brake operator that interlocks and operates front-wheel and rear-wheel braking means in accordance with an operation, and particularly relates to a front-rear interlocking brake device suitable for a motorcycle braking device.

[0002]

2. Description of the Related Art Conventionally, such a device is disclosed in, for example, Japanese Patent Publication No.
It is already known from 7-3298 and Japanese Utility Model Laid-Open No. 50-53842.

[0003]

SUMMARY OF THE INVENTION In the above conventional one,
The reaction force of the rear wheel braking means that operates in response to the brake operation of the rear wheel brake operator acts on the front wheel braking means so that the rear wheel and the front wheel braking means are interlocked. Since the operation force from the operator and the reaction force from the rear wheel braking means are input to the front wheel braking means in parallel, when the front and rear wheel brake operators are simultaneously braked, The operation force of the front wheel brake operator and the rear wheel braking reaction force may act synergistically on the front wheel braking means, and the braking force by the front wheel braking means may become excessive.

The present invention has been made in view of such circumstances, and avoids an excessive braking force of the front wheel braking means when the front and rear wheel brake operating elements are simultaneously brake-operated, and An object of the present invention is to provide a front-rear interlocking brake device for a vehicle in which the rear wheel and front wheel braking means can be interlocked with each other in accordance with the brake operation of the wheel brake operator.

[0005]

In order to achieve the above object, the present invention provides a front wheel braking means for braking a front wheel, a rear wheel braking means for braking a rear wheel, and a front wheel braking means according to a brake operation. In a front-rear interlocking brake device for a vehicle, which includes a front-wheel brake operator that is operated and a rear-wheel brake operator that operates and operates the front-wheel and rear-wheel braking means in response to a brake operation, movement within a limited range is possible. A movable wheel that is rotatably supported by a movable member is wrapped around an operation force transmission line that connects the front wheel brake operator and the front wheel braking means, and the rear wheel braking reaction force during braking by the rear wheel braking means. Is coupled to the movable member on the side that moves the movable member in a direction in which the tension of the operation force transmission rope increases as the rear wheel braking reaction force increases.

[0006]

According to the above construction, when the rear wheel brake operator is braked while the front wheel brake operator is not operated, the movable member is moved by the rear wheel braking reaction force generated by the braking operation of the rear wheel braking means. Then, the tension of the operation force transmission line connecting the front wheel brake operator and the front wheel braking means increases, and the front wheel braking means operates. When the front and rear wheel brake operators are simultaneously braked, the front wheel brake operator's operation force acts on the rear wheel braking means when the front wheel brake operator's operation force is larger than the rear wheel braking reaction force. Further, when the rear wheel braking reaction force is larger than the operation force of the front wheel braking operator, the rear wheel braking reaction force acts on the rear wheel braking means, so that the braking force of the front wheel braking means does not become excessive.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 to 8 show an embodiment of the present invention. FIG. 1 is a front perspective view of a motorcycle, and FIG. 2 is a plan view of the motorcycle for showing a connecting relation of a braking device. 3 is an overall configuration diagram of the braking device, FIG. 4 is a partially cutaway side view of a disc brake mounted on the front wheels, and FIG.
5 is a sectional view taken along line 5, FIG. 6 is a vertical sectional side view of the braking force distribution device, FIG.
Is a sectional view taken along line 7-7 of FIG. 6, and FIG. 8 is a braking force distribution characteristic diagram.

1 and 2, a body frame F of a scooter type motorcycle V is provided with a head pipe 12 which steerably supports a front fork 11 on which a front wheel W _F is suspended. A front cover 13 covers the front part of the vehicle and the upper part of the front wheel W _F. A power unit (not shown) is swingably supported on the body frame F, and a rear wheel W _R is pivotally supported on the rear portion of the power unit. Disc brake B _F as the front wheel braking means is mounted on the front wheels W _F are Thus, the rear wheel W _R drum brake B _R as a rear wheel brake means is mounted.

A steering handlebar 14 connected to the front fork 11 is steerably supported on the head pipe 12, and a right brake lever 1 as a front wheel brake operator is provided at the right end of the steering handlebar 14.
5 is pivotally supported, and the left end of the steering handle 14 has a left brake lever 1 as a rear wheel brake operator.
6 is pivotally supported. When the right brake lever 15 is operated, the disc brake B _F is activated, and when the left brake lever 16 is operated, the drum brake B _R and the disc brake B _F are interlocked.

Referring also to FIG. 3, the operating force of the right brake lever 16 is transmitted to the disc brake B _F through a braking force distribution device 17 housed in the front cover 13 and also the drum brake B. _The rear wheel braking reaction force due to the operation of _F is applied to the disc brake B _F via the braking force distribution device 17.

4 and 5, a bracket 19 is welded and fixed rearward to the lower part of the front fork 11 having a bracket 18 at the lower end, and the caliper 20 of the disc brake B _F mounted on the front wheel W _F. The caliper bracket 21 that supports the front wheel is the axle 2 of the front wheel W _F.
It is fastened together with 2 and is connected to one bracket 18 and is fastened to the other bracket 19.

The front wheel W is provided on the inner side of the caliper bracket 21.
_The disc rotor 22 is fixed to _F. Further, the caliper 20 is provided with a caliper body 24 which is arranged on the outer side surface of the disk rotor 23 so that the main parts are opposed to each other.
It is supported by the caliper bracket 21 so that it can move in a direction parallel to the axis of the. That is, the caliper bracket 21 is provided with a pair of pin bolts 25 ... Which are parallel to the axis of the axle 22.
Are slidably supported by the caliper body 24.

The caliper body 24 is integrally provided with a connecting arm portion 24a extending inward in the axial direction of the axle 22 at a position outside the outer peripheral edge along the radial direction of the disc rotor 23. A nipping arm 25 that holds the outer peripheral portion of the disc rotor 23 between the caliper body 24 and the caliper body 24 is fastened to the tip of the connecting arm portion 24a.

A friction pad 26 ₁ is arranged between the outer peripheral surface of the disk rotor 23 and the caliper body 24, and a friction pad 26 ₂ is arranged between the inner peripheral surface of the disk rotor 23 and the sandwiching arm 25. , Both friction pads 26
₁ and 26 ₂ are supported by the hanger pin 27 provided between the caliper body 24 and the sandwiching arm 25. Also, both friction pads 26 ₁ and 26 ₂ and the caliper 20
Between the connecting arm portions 24a of the two friction pads 26 ₁ , 2
A pad spring 28 for urging 6 ₂ toward the center of rotation of the disk rotor 23, that is, toward the axle 22 is provided.

A bottomed cylinder hole 29 is formed in the caliper body 24 so as to correspond to _one of the friction pads 26 _1. A piston forming a hydraulic chamber 30 between the cylinder hole 29 and the closed end of the cylinder hole 29. 31 is slidably fitted in the cylinder hole 29, and the piston 31 opposes _one friction pad 26 ₁ so as to be able to abut.

The caliper body 24 has a master cylinder 3
2 are integrally provided. In this master cylinder 32,
A piston 34 having a front end facing is slidably fitted in a hydraulic pressure generating chamber 33 communicating with the hydraulic pressure generating chamber 33.
Includes a return spring 3 that biases the piston 34 rearward.
5 is stored. A reservoir tank 36 is provided in the caliper body 24 so as to be located above the master cylinder 32.

On the caliper body 24, a pressing lever 37 and a brake arm 38 are rotatably supported so as to be rotatable about an axis parallel to the axle 22.

The lower end of the pressing lever 37 is at the master cylinder 3
The rear end of the piston 34, which is slidably fitted to the caliper 2, is opposed to the caliper body 24 and the pressing lever 3.
A return spring 39 for urging the pressing lever 37 in a direction in which the lower end of the pressing lever 37 is separated from the rear end of the piston 34, that is, in the counterclockwise direction in FIG. The base end of the adjusting bolt 40 is connected to the upper end of the pressing lever 37 so as to be rotatable about an axis parallel to the axis of rotation of the pressing lever 37. On the other hand, a connecting shaft 41 having an axis parallel to the rotation axis of the brake arm 38 is supported on the upper end of the brake arm 38 so as to be rotatable about the axis, and the adjusting bolt 40 moves in the axis direction. It is possible to penetrate the connecting shaft 41. Moreover, the adjusting bolt 40
An adjusting nut 42 that abuts against the connecting shaft 41 is screwed into the protruding portion of the connecting shaft 41, and an adjusting spring 43 is contracted between the base end of the adjusting bolt 40 and the connecting shaft 41.

According to this structure, when the brake arm 38 rotates clockwise in FIG. 4, the pressing lever 37 rotates clockwise in FIG. 4, and the piston 34 is pushed by the pressing lever 37. As a result, hydraulic pressure is output from the master cylinder 32, and the disc brake B _F is braked.

The right brake lever 15 and the disc brake B _F are connected by an operating force transmission cable 44, and the portion of the operating force transmission device 44 on the disc brake B _F side is composed of an outer tube 45 and an inner wire 46. It consists of a brake cable 47. Thus, the lower end of the outer tube 45 is fixedly connected to a support portion 48 integrally provided on the lower portion of the caliper body 24.
An inner wire 46 protruding from the lower end of the outer tube 45 and covered with a dustproof boot 49 is connected to the lower end of the brake arm 38. Therefore, when the brake cable 47 is pulled, the brake arm 38 is moved to the position shown in FIG.
The disc brake B _F exerts a braking force by rotating counterclockwise.

Referring to FIG. 3, the drum brake B _R mounted on the rear wheel W _R has a brake drum 51 pivotally supported by the axle 50 of the rear wheel W _R and a pin 53 on the brake panel 52.
Pair of brake shoes 54, 54 that are pivotally supported via
And a pair of springs 55, 55 for urging the both brake shoes 54, 54 in directions toward each other, and the brake panel 52 by enabling both the brake shoes 54, 54 to be pressed against the inner peripheral surface of the brake drum 51. A cam 56 pivotally supported by the brake drum 5 and a base end of which is connected to the cam 56.
1 and a brake cam arm 57 extending outward. Moreover, the brake panel 52 is the brake drum 51.
Is supported by the arm portion 58 and the connecting arm portion 59.
Brake panel 5 so that
2 is integrally provided. Thus, the arm 58 and the arm 58
Opposite the are return spring 61 is mounted under compression between the support portion 60 fixed to the vehicle body frame F side, during braking operation of the drum brake B _R by the operation input from the brake cam arm 57, a drum brake When the braking force by B _R exceeds a predetermined value, the brake panel 52, that is, the arm 58
The connecting arm portion 59 is rotatable by the rotation of the rear wheel W _{R and} is rotatable in the counterclockwise direction indicated by the arrow 62 in FIG. 3 while compressing the return spring 61.

A brake cable 63 connected to the left brake lever 16 is connected to the brake cam arm 57, and the drum brake B _R is actuated in response to a brake operation of the left brake lever 16.

Referring to FIGS. 6 and 7 together, the braking force distribution device 17 has a box-shaped box 65 forming an operating chamber 64 with one side open, and an open end of the operating chamber 64. A lid member 66 that is fastened to the box 65 so as to close it
And a movable member 67 housed in the working chamber 64 that is movable in a limited range to the left and right of FIGS. 6 and 7.
And a sprocket 68 as a transmission wheel rotatably supported by the movable member 67.

By the way, the operating force transmission cable 44 connecting between the right brake lever 15 and the disc brake B _F is provided on the side of the right brake lever 15 formed by the brake cable 47 on the disc brake B _F side, the outer tube 69 and the inner wire 70. The brake cable 71 and the chain 72 that connects the inner wires 46 and 70 of the two brake cables 47 and 71 are connected to each other, and the outer tubes 45 and 6 of the two brake cables 47 and 71 are formed.
The end portions of 9 are fixed in parallel to one side of the box 65, and the inner wires 46, 70 inserted into the box 65 from the outer tubes 45, 69 of the chains are connected to the chain 72.
Are connected to each other with the chain 72 and the sprocket 68.
Wrapped around.

A movement restricting portion 73 is provided on one side of the box 65 so as to be positioned between the inner wires 46 and 70.
Is provided, and a stopper 74 made of an elastic material is attached to the movable member 67 so as to be able to contact the movement restricting portion 73.

The sprocket 68 is rotatably supported by a cylindrical sleeve 75 fixed to the movable member 67, and a guide member 76 having a shaft portion 76a inserted into the sleeve 75 is attached to the movable member 67. It is installed. Thus, the inner surface of the box 65 is provided with a guide groove 77 into which the guide member 76 is slidably fitted, and the inner surface of the lid member 66 slides on the end of the shaft portion 76a protruding from the sleeve 75. A guide groove 78 is provided for fitting as much as possible.

A reaction force transmission cable 80 as a reaction force transmission member for transmitting a rear wheel braking reaction force at the time of braking by the drum brake B _R is provided to the movable member 67, and an operation force is transmitted as the rear wheel braking reaction force increases. The movable member 67 is connected to the movable member 67 on the side that moves the movable member 67 in a direction in which the tension of the rope 44 increases.

The reaction force transmission cable 80 is formed by inserting an inner wire 82 into an outer tube 81 so as to be movable in the longitudinal direction, and one end of the outer tube 81 is fixed to the other side of the box 65. One end of the inner wire 82 inserted into the box 65 from one end of the outer tube 81 is connected to the movable member 67 on the side opposite to the stopper 74.

Referring again to FIG. 3, when the connecting arm 59 rotates in the direction indicated by the arrow 62 during the braking operation of the drum brake B _R , the distance between the connecting arm 59 and the connecting arm 59 increases so that the connecting arm 59 increases. A supporting portion 83 facing 59 is fixedly provided on the vehicle body frame F, and the other end of the outer tube 81 in the reaction force transmission cable 80 is provided at the supporting portion 8
Fixed to 3. The other end of the inner wire 82 protruding from the other end of the outer tube 81 is connected to the connecting arm 59. Therefore, the rear wheel braking reaction force generated during the braking operation of the drum brake B _R is transmitted to the movable member 67 of the braking force distribution device 17 via the reaction force transmission cable 80.

Further, the other side of the box 65 and the movable member 67.
Between the return spring 8 and the return spring 8 whose spring force is set to be relatively weak.
4 is reduced.

The operation of this embodiment will now be described. When an operation input is applied to the left brake lever 16 without operating the right brake lever 15, the drum brake B is passed from the left brake lever 16 via the brake cable 63. _The operation input is transmitted to the _R brake cam arm 57, and the drum brake B _R exerts a braking force. When the operation input to the left brake lever 16 increases and the drum brake B _R exerts a braking force equal to or greater than a predetermined value, the rear wheel braking reaction force is generated by the rotation of the connecting arm 59 in the direction of the arrow 62. Is transmitted to the movable member 67 via the reaction force transmission cable 80, and the movable member 67 moves to the left side in FIGS. 6 and 7 while compressing the return spring 84. As a result, tension is generated in the operation force transmission cord 44, the brake cable 47 is pulled, and the disc brake B _F is also interlocked with the braking operation.

That is, as shown in FIG. 8, if the braking force on the rear wheels W _R is less than a predetermined value, the braking force is not exerted on the front wheels W _F , and the braking force on the rear wheels W _R is a predetermined value or more. Then, the braking force will be exerted in conjunction with the front wheels W _F ,
Moreover, when the braking force on the rear wheels W _R is equal to or greater than the predetermined value, the operating force transmitted to the disc brake B _F also increases as the braking force on the rear wheels W _R increases.
It is possible to obtain a braking force distribution characteristic close to the ideal distribution characteristic indicated by the curve of. Moreover, the point P at which the front wheel W _F starts to exert the braking force in conjunction is determined according to the braking force on the rear wheel W _R , and the degree of wear of the linings in the brake shoes 54, 54 of the drum brake B _R and Rear wheel W
_{Even if} the friction coefficient or the like of the _R contact road surface varies, a braking force distribution characteristic closer to the ideal distribution characteristic can be obtained.

When an operation input is applied to the right brake lever 15 without operating the left brake lever 16, the movable member 67 is in a position where the stopper 74 of the movable member 67 is in contact with the movement restricting portion 73. in operation input from the right brake lever 15 is transmitted to the brake arm 38 of the disc brake B _F via the operation force transmission cord 44, the disc brake B _F exerts a braking force.

Further, assume that the left brake lever 16 and the right brake lever 15 are simultaneously operated. In this case, when the operating force of the right brake lever 15 is larger than the rear wheel braking reaction force, the box 65 of the braking force distribution device 17 is used.
In the movable member 67, the stopper 74 is installed in the movement restricting portion 73.
Lies position is brought into contact with, the box of the braking force distribution device 17 when acting operating force of the right brake lever 15 in the drum brake B _R, also the rear wheel brake reaction force is larger than the operation force of the right brake lever 15 In 65, the movable member 67 moves its stopper 74 to a position separated from the movement restricting portion 73, and the rear wheel braking reaction force acts on the drum brake B _R. Therefore, in either case, the drum brake B _R
The braking force of is not excessive.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.

For example, the front wheel braking means may be a drum brake, and the brake operator may be a brake pedal.

[0038]

As described above, according to the present invention, the front wheel brake operating element and the front wheel braking means are connected to the transmission wheel rotatably supported by the movable member that can move within a limited range. The operation force transmission line to be connected is wound around the reaction force transmission member for transmitting the rear wheel braking reaction force at the time of braking by the rear wheel braking means, and the tension of the operation force transmission line is increased as the rear wheel braking reaction force increases. Is coupled to the movable member on the side that moves the movable member in a direction in which the braking force increases, avoiding excessive braking force of the front wheel braking means when the front and rear wheel brake operators are simultaneously braked. On the other hand, the rear wheel braking means and the front wheel braking means can be interlocked and operated by the brake operation of the rear wheel braking operator without operating the front wheel braking operator.

[Brief description of drawings]

FIG. 1 is a front perspective view of a motorcycle.

FIG. 2 is a plan view of the motorcycle showing the connection relationship of the braking devices.

FIG. 3 is an overall configuration diagram of a braking device.

FIG. 4 is a partially cutaway side view of a disc brake mounted on a front wheel.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a vertical side view of the braking force distribution device.

7 is a sectional view taken along line 7-7 of FIG.

FIG. 8 is a braking force distribution characteristic diagram.

[Explanation of symbols]

15 ... Right brake lever as front wheel brake operator 16 ... Left brake lever as rear wheel brake operator 44 ... Operating force transmission cable 67 ... Movable member 68 ... As transmission wheel Sprocket 80 ... Reaction force transmission cable as reaction force transmission member _BF ... Disc brake as front wheel braking means _BR ... Drum brake as rear wheel braking means

Claims (1)

[Claims] 1. A front wheel (W_F) Front wheel braking means
(B_F) And the rear wheel (W _R) Rear wheel braking means (B
_R) And the front wheel braking means (B_F)
Brake operator (15) for the front wheels to be operated, and the brake
The front and rear wheel braking means (B_F, B_R)
With the rear wheel brake operator (16) that interlocks and operates the
In the vehicle front-rear interlocking braking device equipped with
Can be rotated by a movable member (67) that can move within a limited range
The front wheel brake operator is attached to the transmission wheel (68) supported by the
(15) and front wheel braking means (B_F) Operation to connect between
The force transmission rope (44) is wound around the rear wheel braking means.
(B_R) Transmission of reaction force to transmit rear wheel braking reaction force when braking
The reaching member (80) moves forward as the rear wheel braking reaction force increases.
The movable portion is moved in the direction in which the tension of the operation force transmission rope (44) increases.
On the side that moves the material (67), connect it to the movable member (67).
Front-rear interlocking brake equipment for vehicles characterized by being connected
Place.