JP2001171506A - Interlocking braking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interlocking braking device which enables a master cylinder connected with a hydraulic type wheel brake to operate in accordance with braking operation of an independent braking operating element and interlocking braking operating element, and exerts braking operation force to the master cylinder and a mechanical type wheel brake during braking operation of the interlocking braking operation element, wherein a knocker for pushing a piston of the master cylinder is composed of a small number of parts and has a simple construction. SOLUTION: The knoker 25 of a single part which comes into direct contact with a rear end of a piston rod 31a is supported by a cylinder body 30 such that the knoker 25 can rotate around an axis perpendicularly crossing with one plane including an operating axis of a piston 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a master cylinder connected to a hydraulic wheel brake which can be actuated in response to a brake operation of an independent brake operator and an interlock brake operator, and a brake operation of an interlock brake operator. In some cases, the present invention relates to an improvement of an interlocking brake device capable of exerting a brake operation force on the master cylinder and the mechanical wheel brake.

[0002]

2. Description of the Related Art Conventionally, such an interlocking brake device is already known, for example, from Japanese Patent Application Laid-Open No. 11-91673.

[0003]

In the above-described conventional interlocking brake device, a knocker that is rotatably operated in response to a brake operation of an independent and interlocking brake operation member is rotatably supported by a cylinder body of a master cylinder. The push pin provided in the knocker presses the piston of the master cylinder. That is, the knocker includes a pair of levers disposed on both sides of the operating axis of the piston, and a push pin having an axis orthogonal to the operating axis and connecting the levers.

In such a conventional interlock brake device,
The knocker is composed of a plurality of parts, and the configuration of the knocker is complicated.

The present invention has been made in view of such circumstances, and has as its object to provide an interlocking brake device in which a knocker for pushing a piston of a master cylinder has a simple structure with a small number of parts. .

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a piston having a front surface facing a hydraulic chamber connected to a hydraulic wheel brake can slide on a cylinder body. A master cylinder fitted to the piston, a knocker capable of pressing a rear end of a piston rod connected to the piston, an independent brake operator and an interlocking brake operator capable of operating a brake independently of each other, A load distributing means for distributing the operating force at a preset distribution ratio to the mechanical wheel brake side and the knocker side in accordance with the brake operation of the brake operator, and avoiding mutual interference between the independent brake operator and the load distributing means. And a connecting means for connecting the independent brake operator and the load distribution means to the knocker. The knocker single piece of contact,
The piston is supported by the cylinder so as to be rotatable around an axis perpendicular to a plane including an operation axis of the piston.

According to such a configuration, since the piston rod of the master cylinder is directly pushed by the knocker, which is a single component, the number of components can be reduced and the configuration of the knocker can be simplified.

[0008] The invention according to claim 2 provides the above-mentioned claim 1.
In addition to the configuration of the invention described, the knocker is formed in a flat plate shape along the one plane including the operating axis of the piston, and according to this configuration, the shape of the knocker can be simplified. It can be made compact while planning.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the present invention, a reservoir tank is formed integrally with the cylinder body. The cylinder and the reservoir tank can be configured compactly.

[0010] The invention according to claim 4 is the above-mentioned claims 1-3.
In addition to the configuration of the invention described above, the load distribution unit and the connection unit are disposed on one side of the one plane including the operating axis of the piston, and according to the configuration, the interlocking brake device is provided. Since the operating portions of the above components can be arranged collectively, the layout when the interlocking brake device is assembled to the vehicle becomes easy.

According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect, a reservoir tank disposed on the other side of the one plane including the operating axis of the piston is provided on the cylinder body. According to this configuration, the reservoir tank can be arranged without being restricted by the layout of the operation part among the components of the interlocking brake device, and the volume of the reservoir tank can be reduced. It can be set large,
In addition, the master cylinder, the reservoir tank, the load distribution means and the connecting means can be compactly arranged as a whole.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on one embodiment of the present invention shown in the attached drawings.

FIGS. 1 to 9 show an embodiment of the present invention. FIG. 1 is a side view of a motorcycle, FIG. 2 is a diagram showing an overall structure of an interlocking brake device, and FIG. FIG. 4 is an enlarged side view, FIG.
6 is a sectional view taken along the line 6-6 in FIG. 3, and FIG.
8 is a sectional view taken along the line 7-7, FIG. 8 shows an operation state of the independent brake operating member in an operating state, (a) is a view corresponding to FIG. 3, (b) is a view corresponding to FIG. 7, FIG. 9 shows an operating state of the interlocking brake operating member in an operating state.
(A) is a diagram corresponding to FIG. 3, and (b) is a diagram corresponding to FIG.

Referring to FIG. 1, a scooter-type motorcycle body frame 11 includes a front frame 12 and a rear frame 13 fastened to the rear of the front frame 12.
It is composed of The front frame 12 includes a steering stem 14a of a front fork 14 that supports the front wheels WF.
Pipe portion 12a for supporting the steering wheel, and a down tube portion 1 extending downward from the head pipe portion 12a.
2b and a bottom portion 12c extending rearward from a lower end of the down tube portion 12b. A bar-shaped steering handle 15 is connected to an upper end of the steering stem 14a.

The rear frame 13 is provided with the bottom portion 12c.
It is formed so as to extend upward from the rear part and to incline rearward from the middle. A power unit 16 that supports and drives the rear wheel WR is supported in a middle portion of the rear frame 13 so as to be able to swing up and down. A rear cushion 17 is provided between the middle portion of the rear frame 13 and the power unit 16. A storage box 18 for storing a helmet or the like is provided on the rear frame 13, and a seat 19 also serving as a lid is provided on the storage box 18.

Referring to FIG. 2 as well, an independent brake lever 21 as an independent brake operation member is supported on the steering handle 15 adjacent to the right grip 20R so as to enable a brake operation. An interlocking brake lever 22 as an interlocking brake operation member is supported adjacent to the grip 20L to enable a brake operation.

On the other hand, a disk brake BF, which is a hydraulic wheel brake, is mounted on the front wheel WF, and a drum brake BR, which is a mechanical wheel brake, is mounted on the rear wheel WR. Thus, the disc brake BF can be operated independently, and the brake operation of the interlocking brake lever 22 can interlock the disc brake BF and the drum brake BR.

Front frame 1 of body frame 11
A master cylinder unit 23 is attached to the second head pipe portion 12a. Brake hydraulic pressure is supplied from the master cylinder unit 23 to the disc brake BF in response to a brake operation of the independent brake lever 21. In response to the brake operation, the brake fluid pressure is supplied from the master cylinder unit 23 to the disc brake BF, and a traction force acts on the drum brake BR.

3 to 7, a master cylinder unit 23 includes a master cylinder 24 capable of outputting brake fluid pressure, a knocker 25 for applying a pressing force to the master cylinder 24, a reservoir tank 26, and an interlocking brake lever 22. Of the independent brake lever 21 and the load distribution lever 27 as load distribution means for distributing the operation force to the drum brake BR side and the knocker 25 side at a preset ratio in accordance with the brake operation of the vehicle. The connecting means 28 for connecting the independent brake lever 21 and the load distribution lever 27 to the knocker 25 while avoiding the occurrence thereof is unitized.

The master cylinder 24 has a front surface, that is, an upper surface, facing a hydraulic chamber 32 on a cylinder body 30 which is vertically extended and has a closed upper end when the master cylinder unit 23 is mounted on the vehicle body frame 11. The inserted piston 31 is slidably fitted.
The hydraulic pressure chamber 32 is formed between the upper end closed portion of the cylinder body 30 and the upper surface of the piston 31. The hydraulic pressure chamber 32 has a return spring 33 for urging the piston 31 rearward, that is, downward. Is stored. Moreover, the cylinder body 30
At the rear end, that is, at the lower end opening, a retaining ring 39 for restricting the retreat limit of the piston 31 is mounted.

At the upper end of the cylinder body 30, one end of a hydraulic hose 34 communicating with a hydraulic chamber 32 is provided with a banjo type pipe joint 3.
5 and the other end of the hydraulic hose 34 is connected to the disc brake BF. That is, the hydraulic chamber 3
2 is connected to the disc brake BF.

An annular recess 36 is provided on the outer surface of the piston 31. A pair of cup seals 37, 3 are sandwiched between the annular recess 36 from both sides in the axial direction of the piston 31.
8 is mounted on the outer surface of the piston 31. Moreover, of the two cup seals 37, 38, the annular concave portion 36 and the hydraulic chamber 32
The cup seal 37 disposed therebetween allows the flow of the brake fluid from the annular recess 36 to the hydraulic chamber 32 when the hydraulic pressure in the hydraulic chamber 32 becomes lower than the hydraulic pressure in the annular recess 36.

The cylinder body 30 is integrally formed with a reservoir tank 26 which extends vertically when the master cylinder unit 23 is attached to the vehicle body frame 11 and has a closed lower end. Is closed by a lid member 40.

In the reservoir tank 26, while preventing the brake fluid in the reservoir tank 26 from contacting with the outside air as much as possible, the pressure acting on the brake fluid does not change in accordance with the change in the fluid volume. A diaphragm 41 is provided at the upper end of the diaphragm 41, and a flange 41 a is provided at the upper end of the diaphragm 41.
a and the holding plate 42 placed on the reservoir tank 2
6 and the lid member 40. Moreover, the holding plate 42
A communication hole 43 communicating with the inside of the diaphragm 41 is provided in a central portion of the cover member 40, and a passage 44 communicating with the communication hole 43 is formed between the pressing plate 42 and the lid member 40. Opened to the outside on the side.

A viewing window 45 is provided at an intermediate portion of the reservoir tank 26 in the vertical direction.
Is closed in a liquid-tight manner by a light-transmitting plate 46 made of glass or synthetic resin, so that the condition in the reservoir tank 26 can be visually recognized through the light-transmitting plate 45.

In the lower part of the reservoir tank 26, a supply port 47 for supplying the brake fluid in the reservoir tank 26 to the annular recess 36 is provided.
As shown in FIG. 6, a relief port 48 is provided for connecting the hydraulic pressure chamber 32 to the reservoir tank 26 in a state where 1 is at the retreat limit.

A piston rod 31a extending rearward, that is, downward, is integrally and coaxially connected to the piston 31, and the rear end of the piston rod 31a projects rearward, that is, downward from the cylinder body 30.

The knocker 25 is capable of pressing the rear end of the piston rod 31a, and the knocker support portion 30a provided integrally with the lower end of the cylinder body 30 is provided with an axis perpendicular to a plane P including the operating axis of the piston 31. One end of the knocker 25 is rotatably supported via a supporting shaft 49 having the same. Moreover, the knocker 25 is a single component formed in a flat plate shape along the one plane P, and a pressing portion 25a that directly contacts the rear end of the piston rod 31a is formed integrally with an intermediate portion of the knocker 25.

The connecting means 28 includes a first connecting member 50 extending vertically, and a second connecting member 50 extending vertically longer than the first connecting member 50 and arranged to overlap the first connecting member 50.
Connecting member 51, cylinder body 30 and second connecting member 5
The torsion spring 52 is provided between the two and is arranged on one side of the one plane P.

A first elongated hole 53 extending vertically is provided below the first connecting member 50, and a connecting pin 54 provided at the other end of the knocker 25 is inserted into the first elongated hole 53.
The second connecting member 51 is also provided with a second elongated hole 55 having the same width as the first elongated hole 53 and extending vertically.
4 is also inserted into the second long hole 55. Moreover, the connecting pin 54
In the middle part, there is provided a diameter-enlarging portion 54a that slides the stepped portion at both ends on the opposing surfaces of the first and second connecting members 50 and 51 at the side edges of the first and second long holes 53 and 55.

The independent brake lever 21 has the first
One end of an input cable 58 is connected, and a cylindrical connection terminal 5 provided at the other end of the first input cable 58 is provided.
9 is fitted and connected to the upper part of the first connecting member 50. The first input cable 58 penetrates a first cable support portion 30 b formed integrally with the cylinder body 30, and the guide tube 6 surrounding the first input cable 58.
The 0 end is in contact with and supported by the first cable support 30b.

The load distribution lever 27 is arranged so as to extend laterally on the same side as the connecting means 28 with respect to a plane P including the operating axis of the piston 31. That is, the load distribution lever 27 and the connecting means 28 are arranged on one side with respect to one plane P including the operating axis of the piston 31, and the reservoir tank 26 is arranged on the other side with respect to the one plane P.

One end of the load distribution lever 27 is connected to an upper portion of the second connection member 51 of the connection means 28 via a connection pin 61.

One end of a second input cable 62 is connected to the interlocking brake lever 22, and a cylindrical connection terminal 63 provided at the other end of the second input cable 62 is fitted to an intermediate portion of the load distribution lever 27. Connected. Also the second
The input cable 62 penetrates the second cable support portion 30c formed integrally with the cylinder body 30, and the end of the guide tube 64 surrounding the second input cable 62 contacts the second cable support portion 30c. Contact and support.

At the other end of the load distribution lever 27, a second cable support portion 30d formed integrally with the cylinder body 30 is provided.
A cylindrical connection terminal 66 provided at one end of an output cable 65 penetrating through the cable is fitted and connected, and an end of a guide tube 67 surrounding the output cable 65 abuts and is supported by the third cable support portion 30d. . The other end of the output cable 65 is connected to an operation lever 68 of the drum brake BR.

The torsion spring 52 of the connecting means 28 has one end engaged with and connected to the second connecting member 51 and the other end abuts and engages with the cylinder body 30 to surround the support shaft 49. And the torsion spring 5
2, the second connecting member 51 is urged downward to move downward, and the load distribution lever 27 connected to the second connecting member 51 is urged such that one end thereof is at the lower position. Will be. Thus, in the cylinder body 30,
A stopper 69 that abuts on the lower surface on one end side of the load distribution lever 27 and regulates the downward movement of the second connecting member 51 and the downward movement of the one end side of the load distribution lever 27 is integrally provided.

The first cable support portion 30b for supporting the guide tube 60 of the first input cable 58 extends to above the second connecting member 51.
When the upper end of the second contact member abuts on the second cable support portion 30b, the upward movement of the second connecting member 51 and the upward movement of one end of the load distribution lever 27 are restricted.

According to the load distribution lever 27 and the connecting means 28, when the independent brake lever 21 is operated, the first input cable 58 is pulled as shown in FIGS. 8 (a) and 8 (b). The connection means 28
Is pulled up. The upward movement of the first connecting member 50 is transmitted to the knocker 25 via the connecting pin 54 engaged with the lower edge of the first long hole 53, and the knocker 25 presses the piston rod 31a of the master cylinder 24. The brake hydraulic pressure generated in the hydraulic chamber 32 of the master cylinder 24 acts on the disk brake BF. At this time, the connecting pin 54 is
It only moves upward in the long hole 55, the second connecting member 51 does not move upward, and the brake operating force of the independent brake lever 21 does not extend from the connecting means 28 to the load distribution lever 27 side. .

The operation of the interlock brake lever 22 during the brake operation will be described with reference to FIGS. 9A and 9B. The second input cable 62 is pulled in accordance with the brake operation of the interlock brake lever 22. As a result, when the intermediate portion of the load distribution lever 27 is pulled upward, the spring force of the torsion spring 52 acts on one end of the load distribution lever 27 at first.
FIG. 9A shows a state where the connecting pin 61 on one end is used as a fulcrum.
Rotate as shown by the dashed line. As a result, the output cable 65 is pulled, and the drum brake BR mounted on the rear wheel WR performs a brake operation prior to the disc brake BF of the front wheel WF. Thus, the operation timing of the disc brake BF of the front wheel WF is changed to the drum brake B of the rear wheel WR.
It is effective to make the delay behind R to obtain a good brake feeling of the motorcycle.

By increasing the brake operation force of the interlocking brake lever 22, when the force acting on the second connecting member 51 from the second input cable 62 via the load distribution lever 27 exceeds the set load of the torsion spring 52, FIG. 9 (a)
As shown by the solid line, the entire load distribution lever 27 is pulled up, and the distance between the connection pin 61 and the connection terminal 63 and the distance between the connection terminals 63 and 66 are applied to the second connection member 51 and the output cable 65. The operating force acts at a distribution ratio corresponding to the ratio of. As a result, the drum brake BR of the rear wheel WR continuously performs the brake operation,
As the second connecting member 51 is pulled upward,
The knocker 25 pivots around the axis of the support shaft 49 via the connecting pin 54 engaged with the lower edge of the second long hole 55 to press the piston rod 31a, and the brake hydraulic pressure generated in the hydraulic pressure chamber 32 is reduced. It will act on the disc brake BF. At this time, the connecting pin 54 only moves upward in the first elongated hole 53 of the first connecting member 50, and the first connecting member 50 does not move upward, and the independent brake lever 21 The side is not affected.

Further, by further increasing the brake operating force of the interlocking brake lever 22, the second connecting member 51
When the upward movement of the second connecting member 51 is restricted by contacting the cable support portion 30b, the load distribution lever 27
Can be further rotated about the connection pin 61 as a fulcrum.
Therefore, it is possible to further increase the braking force by the drum brake BR of the rear wheel WR, and to secure the braking force on the rear wheel WR side even if the disk brake BF of the front wheel WF becomes malfunctioning due to hydraulic pressure failure or the like. be able to.

A detected portion 27a projecting downward is integrally provided at an intermediate portion of the load distribution lever 27, and a first brake switch 70 having a detector 70a contacting the detected portion 27a is connected to the cylinder body 30. Is supported by the first switch support portion 30e. The other end of the knocker 25 is integrally provided with a detected portion 25a having a substantially L-shaped cross section, and a second brake switch 71 having a detector 71a that contacts the detected portion 25a is provided. It is supported by a second switch support 30f provided on the cylinder body 30.

The first brake switch 70 detects that the load distribution lever 27 has turned upward in response to the brake operation of the interlocking brake lever 22, and the second brake switch 71 detects that the independent brake lever 21 In response to the brake operation of at least one of the interlocking brake levers 22, it is detected that the knocker 25 has rotated so as to press the piston rod 31a.

Next, the operation of this embodiment will be described.
The single-part knocker 25 that directly contacts the rear end of the piston 31 is supported on the cylinder body 30 by allowing rotation about an axis perpendicular to a plane P including the operating axis of the piston 31.
The piston rod 31a of the master cylinder 24 is directly pushed by the knocker 25, which is a single part, so that the number of parts can be reduced as compared with the case where the knocker is composed of a plurality of parts, and the configuration of the knocker 25 is simplified. can do.

Since the knocker 25 is formed in a flat plate shape along the one plane P, the knocker 25 can be made compact while simplifying the shape of the knocker 25.

The reservoir tank 26 has a cylinder 30
, The master cylinder 24 and the reservoir tank 26 can be compactly integrated.

Further, since the load distribution lever 27 and the connecting means 28 are disposed on one side of the one plane P, it is possible to collectively arrange the operating parts of the components of the interlocking brake device, and to operate the interlocking brake. The layout at the time of assembling the device to the vehicle becomes easy.

Further, since the reservoir tank 26 is arranged on the other side of the one plane P, it is possible to arrange the reservoir tank 26 without being restricted by the layout of the operating part among the components of the interlocking brake device. In addition, the capacity of the reservoir tank 26 can be set large. Moreover, the master cylinder 24 and the reservoir tank 2
6. The load distribution lever 27 and the connecting means 28 can be arranged compactly as a whole.

Although the embodiments of the present invention have been described in detail, 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 appended claims. It is possible to do.

[0050]

As described above, according to the first aspect of the present invention, the number of parts can be reduced by directly pushing the piston rod of the master cylinder with the knocker which is a single part, and the structure of the knocker can be reduced. Can be simplified.

According to the second aspect of the present invention, the knocker can be made compact while simplifying its shape.

According to the third aspect of the present invention, the master cylinder and the reservoir tank can be configured compactly.

According to the fourth aspect of the present invention, the operating portions of the components of the interlocking brake device can be arranged collectively, and the layout when the interlocking brake device is mounted on the vehicle is facilitated.

According to the fifth aspect of the present invention, it is possible to arrange the reservoir tank without being restricted by the layout of the operating part among the components of the interlocking brake device, and to set the capacity of the reservoir tank large. It is possible to arrange the master cylinder, the reservoir tank, the load distribution means and the connecting means as a whole in a compact manner.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle.

FIG. 2 is a diagram showing an overall configuration of an interlocking brake device.

FIG. 3 is an enlarged side view of a master cylinder unit.

FIG. 4 is a view taken in the direction of arrow 4 in FIG. 3;

FIG. 5 is a view taken in the direction of arrow 5 in FIG. 3;

FIG. 6 is a sectional view taken along line 6-6 in FIG. 3;

FIG. 7 is a sectional view taken along the line 7-7 in FIG. 6;

FIGS. 8A and 8B show an operation state of the independent brake operation element in an operating state, where FIG. 8A is a view corresponding to FIG. 3 and FIG. 8B is a view corresponding to FIG.

FIGS. 9A and 9B show an operation state of the interlocking brake operation element in an operation state, where FIG. 9A is a view corresponding to FIG. 3 and FIG. 9B is a view corresponding to FIG.

[Explanation of symbols]

21 ... Independent brake lever as independent brake operator 22 ... Interlock brake lever as interlock brake operator 24 ... Master cylinder 25 ... Knocker 26 ... Reservoir tank 27 ... Load distribution means Load distribution lever 28 Connection means 30 Cylinder body 31 Piston 31a Piston rod 32 Hydraulic pressure chamber BF Disc brake as hydraulic wheel brake BR・ Drum brake as mechanical wheel brake

Claims (5)

[Claims] 1. A master cylinder in which a piston (31) having a front surface facing a hydraulic chamber (32) connected to a hydraulic wheel brake (BF) is slidably fitted to a cylinder body (30). (24), a knocker (25) capable of pressing a rear end of a piston rod (31a) connected to the piston (31), an independent brake operator (21) capable of operating a brake independently of each other, and Interlocking brake operator (2
2) and load distribution means (27) for distributing the operating force to the mechanical wheel brake (BR) side and the knocker (25) side at a predetermined distribution ratio according to the brake operation of the interlocking brake operation element (22). ) And independent brake operator (21)
Connecting means (2) for connecting said independent brake operator (21) and said load distributing means (27) to said knocker (25) while avoiding mutual interference between said load distributing means and said load distributing means (27).
8), the single-part knocker (25) that directly contacts the rear end of the piston rod (31a) is located on a plane (P) including the operating axis of the piston (31). An interlocking brake device characterized in that the interlocking brake device is rotatable about an orthogonal axis and is supported by the cylinder body (30). 2. The knocker (25) includes a piston (3).
The interlocking brake device according to claim 1, wherein the interlocking brake device is formed in a flat plate shape along the one plane (P) including the operation axis of (1). 3. The interlocking brake device according to claim 1, wherein a reservoir tank (26) is formed integrally with the cylinder body (30). 4. The load distributing means (27) is provided on one side of the plane (P) including the operating axis of the piston (31).
Interlocking brake device according to any of the preceding claims, wherein said coupling means (28) are arranged. 5. A reservoir tank (26) arranged on the other side of said one plane (P) including an operating axis of said piston (31) is formed integrally with said cylinder body (30). The interlocking brake device according to claim 4, wherein