JPH03159887A - Motion sensing mechanism for car brake device - Google Patents

Abstract

PURPOSE:To reduce the number of parts used by installing a sensing switch formed in a unit so as to block an opening for insertion of a driving rod of a master cylinder, which belongs to an operation sensing mechanism for a motorcycle, supporting the driving rod by one end within the case of the switch, and extending the rod to a brake operational member. CONSTITUTION:A case body 31 of a brake switch 20 is installed at a bottom opening 30c of the body 14c of master cylinder, and thus the opening 30c is blocked. With a certain gap reserved, a driving rod 13b is inserted in a through hole 31d formed in the inner cylinder 31b of the case body 31, and is supported while the top 13c of the rod 13b is in contact with the oversurface edge of a protrusion 31c on the mentioned inner cylinder 31b. The other end of the driving rod 13b is coupled with a brake pedal 12 through a metal fixture 13a. This allows enhancement of the arranging space and layout and also reduces the number of parts used.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mechanism for detecting that a braking device of a motorcycle or the like is in an operating state, and in particular, it is capable of reducing the number of parts and , relates to an improvement in the structure of a switch that ensures versatility of the detection mechanism and simplifies the structure.

[Conventional technology]

For example, a brake device for a rear wheel of a motorcycle is provided with an operation detection mechanism that detects depression of a brake pedal using a brake pad and thereby lights up a brake light. As such a brake operation detection mechanism, there is one described, for example, in Japanese Patent Application Laid-Open No. 160382/1982. This has a structure in which a brake switch that is turned on and off by the protrusion and retraction of a switch operator is installed near the brake pedal, and an operating member that rotates in conjunction with the brake pedal is connected by a spring to the brake switch operator. . The reason for the connection via the spring is as follows. In other words, since the above-mentioned conventional operation detection mechanism is of the type that uses an actuating member that moves in conjunction with the brake pedal to pull out the brake inch operator when the brake pedal is depressed, the amount of rotation of the actuating member depends on the amount of depression of the brake pedal (the amount of rotation of the actuating member). This is to prevent the risk of the control element being damaged.

[Problem that the invention seeks to solve]

In the conventional structure described above, the master cylinder and brake switch are installed separately, and a mechanism for adjusting the position of the pedal upon return is provided near the brake pedal. Various parts such as a return spring or a footrest 1 are arranged. Therefore, there is a problem in that it is difficult to secure a space for arranging the brake inch and to layout it.

Also, the brake pedal. The shape and structure of the footrest, etc., and the placement position differ from model to model, so it is necessary to determine the installation position of the brake inch for each model accordingly. Therefore, the positional relationship between the brake pedal and the brake switch differs depending on the model. It will be different each time. Therefore, it is necessary to accommodate the difference in the positional relationship between the two, and conventionally this has been done by changing the length of the spring. Therefore, a spring corresponding to each model is required, and as a result, the conventional operation detection mechanism described above has a problem of low versatility.

The present invention has been made in view of the above-mentioned problems of the conventional art. Another object of the present invention is to provide an operation detection mechanism for a vehicle braking device that is advantageous in terms of layout, can reduce the number of parts, and can improve versatility.

[Means for solving problems]

The present invention is an operation detection mechanism for a vehicle braking device in which hydraulic pressure is generated in a master cylinder by the operation of a brake operating part, and the wheels are braked by the hydraulic pressure. The drive rod is attached to the master cylinder so as to close its drive rod insertion opening, the drive rod is extended from the through hole of the case toward the brake operating member, and the end of the drive rod is supported by the case. It is said that

[Effect]

Since the operation detection mechanism of the vehicle braking device according to the present invention has a structure in which the detection switch case is attached to the master cylinder, the installation space for the detection switch is very small, and the above-mentioned conventional method in which a separate part is provided near the footrest There are no layout problems like in the case of .

Furthermore, the case of the detection switch functions as a lid that closes the opening of the master cylinder, and the number of parts can be reduced by eliminating the need for the closing lid.

Furthermore, since the detection switch is attached to the master cylinder as is, and there are no parts that need to be changed for each model, it can be applied to any type of braking device that uses a master cylinder, making it highly versatile.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 are diagrams for explaining an operation detection mechanism of a rear wheel braking device for a motorcycle according to a first embodiment of the present invention.

In the figure, reference numeral 1 denotes a motorcycle to which the mechanism of this embodiment is applied, and the body frame 2 of the motorcycle 1 is of a so-called double cradle type, and this has a hemlock pipe 2a on the left side. Right pair of main pipes 2b and down tube 2C
A seat rail 2e is extended rearward from the rear of the main pipe 2b, and the rear ends of the main pipe 2b and down tube 2C are connected to the middle of the seat rail 2e by a cross stay 2d. It has become. The front fork 4 that pivotally supports the front wheel 3 at the lower end of the henovib 2a is located on the left side. It is pivoted to the right so that it can be steered freely, and the above-mentioned bar 7 axle 2d
A rear arm 6, which pivotally supports a rear wheel 5 at its rear end, is pivotally supported on the rear arm bracket. In addition, the above body frame 2
An engine unit 7 is mounted inside the cradle, and a fuel tank 8 and a seat 9 are mounted above from the front.

A support bracket 2f for supporting each component is welded and fixed to the lower rear side of the bathoku stay 2d. A footrest main body 25a is supported by this bracket 2f via a footrest bracket 25b. Further, a braking device 10 is provided on the rear side of this footrest main body 25a.
A brake pedal 12 is provided. This braking device 10 mainly includes the brake pedal l2, a master cylinder 14, and a caliper 19.

The brake pedal 12 is rotatably supported by a support shaft 1 mounted on the support bracket 2f, and is biased to a return position (non-operating position) by a return spring 12a. Further, a drive arm 12b is fixed to the pivot end of the brake pedal 12, and a connecting fitting 13a screwed onto the drive rod 13b of the master cylinder 14 is pin-coupled to the drive arm 12b. In addition, 2
Reference numeral 1 denotes a cover that covers the vicinity of the driving rod 13b.

In the master cylinder 14, a piston 23 having seal members at both ends is movably inserted into a cylinder hole 30a formed in the axis of the cylinder body 14C, and between the upper end of the piston 23 and the bottom 30b of the cylinder hole. biasing spring 23
a, and the lower end of the piston 23 is brought into contact with the upper end 13c of the driving rod 13b.
The bracket portion 14a is bolted and fixed to the bracket 2h of the banokku stay 2d.

A communication hole 14e is connected to the pressure chamber 14g of the master cylinder 14.
The fuel supply joint }14b, which communicates with the fuel supply joint 14b, is connected to a reserve tank 15 by a fuel hose 16, and the tank 15 is attached to the seat rail 2e. Further, one end of the brake hose ■7 is connected to the discharge port 14f of the master cylinder 14.
extends rearward along the rear arm 6, and its midway portion is fixed to the bracket 6a of the rear arm 6 with a band 17b. Also, the rear end portion 17 of the brake hose 17
a is connected to the caliper l9. In addition, 22 is a suspension supported by the bracket 6b, and 18 is a foot rest.

The resin case body 31 of the brake switch 20, which detects the operation detection mechanism of this embodiment, is attached to the lower end opening 30C of the cylinder body 14C by screwing. 30C is blocked. This case body 31 has an inner cylinder 3lb inside an outer cylinder 31a.
It has a structure in which the inner cylinder 3lb is integrally formed and projects inward from the outer cylinder 31a, and the protrusion 31C is screwed into the opening 30C of the cylinder body 14C. Further, the driving rod 13b is inserted into the through hole 31d of the inner cylinder 3lb with a slight gap therebetween, and this gap absorbs vibrations of the rod 13b. Furthermore, the protrusion 31C of the inner cylinder 3lb
The upper end 13C of the drive rod 13b is in contact with the upper surface edge, and the drive rod 13b is thereby supported by the case body 3l.

Further, a camp 32 is fitted to the lower end of the outer cylinder 31a by engaging its protrusion 32b.
A slide member 33 is inserted into 2 so as to be slidable in the axial direction. This slide member 33 is connected to the drive rod 13b.
It is in contact with a rotor screw 34 screwed onto the middle part of the ring. Furthermore, a cover 32a is provided between the candlestick 34 and the cassob 32.

A switch member 35 is slidably fitted on the outer periphery of the inner cylinder 3lb, and a band-shaped contact 35a is wound around the lower part of the outer periphery of the switch member 35. Also, the switch member 35 and the bottom of the outer cylinder 31a. and the upper end of the slide member 33 are provided with coil springs P+. Pz
The sui-no-chi member 35 is mutually biased by an upper coil spring P1 and a lower coil spring P2 having a larger biasing force. Further, a pair of switch terminals 36 fixed to the outer cylinder 31a are in sliding contact with the upper part of the contact 35a of the switch member 35, and both terminals 36 are connected to the brake lamp lighting circuit by a wire connector 36a. ing. As a result, the placket switch 20 of this embodiment is constructed.

Next, the effects of this embodiment will be explained.

When the driver depresses the brake pedal 12, the brake pedal 1
2, the drive arm 12b moves to the drive rod 13b.
is moved upward, and the drive rod 13b pushes up the piston 23 of the master cylinder 14, which causes the piston 23 to rise while blocking the communication hole 14e and open the pressure chamber 14g.
Generates hydraulic pressure inside. This oil pressure is the brake hose 17
acts on the caliper 19 through the caliper 19,
l0 supports the disc 5a of the rear wheel 5, and as a result the rear wheel 5 is braked.

When the drive rod 13b is moved by depressing the brake pedal 12, the slide member 33 moves the switch member 35 upward while contracting the weak spring P+, and connects both switch terminals 3 to the contact point 35a.
6 comes into contact with the brake switch 20, which turns on the brake switch 20 and lights up the brake lamp. In this case, when the brake pedal 12 is further depressed, the spring P2 with a strong urging force absorbs the movement of the slide member 33.

As described above, according to the operation detection mechanism according to the present embodiment, since the brake switch 20 is turned on by the movement of the drive rod 13b, the operation of the brake can be detected. Since this embodiment has a structure in which the case body 31 of the brake switch 20 is screwed into the opening 30c of the master cylinder 14, the case body 31 functions as a cover for the opening 30c, and a separate cover is provided. 1) The number of parts can be reduced by the amount of unnecessary parts. Moreover, the case body 3 is attached to the master cylinder 14.
1 is directly connected, the space for arranging the brake switch 20 is very small, and there is no problem with the layout as in the above-mentioned conventional arrangement where the brake switch 20 is installed near the footrest 1.

Further, since the brake switch 20 is directly attached to the master cylinder 14, it can be used regardless of the model of any brake device that uses a master cylinder, and is highly versatile.

Furthermore, in this embodiment, when adjusting the return position of the brake pedal 12, the adjustment does not affect the operation of the brake pad 20, so only the brake pedal needs to be adjusted, reducing the number of adjustment steps. can. In other words, in the conventional structure, when the return position of the brake pedal is adjusted, the positional relationship between the brake switch and the actuating member changes, so in order to correct this, it is necessary to adjust the positional relationship of the brake switch. Although there was a problem that the work was time-consuming, this problem can be solved in this embodiment.

12 FIG. 5 is a diagram for explaining a second embodiment of the present invention, and in the figure, the same reference numerals as in FIG. 1 indicate the same or corresponding parts.

In this embodiment, the brake switch 2 is connected to the master cylinder 14.
This is an example in which the case body 40 of No. 0 is fitted and attached. A recess 41 is formed in the lower part of the cylinder body 14c, and a case main body 40 having a through hole 40c is inserted into the recess 41, and a protrusion 42 formed by cutting and raising the lower end of the case main body 40 is inserted into the recess 41. The case body 40 is fitted into a fitting hole 41a formed in the recess 41, thereby embedding the case body 40 in the cylinder body 14c.

Further, a slide member 33 is movably inserted between the outer cylinder 40a and the inner cylinder 40b of the case body 40, and a camp 43 is attached between the slide member 33 and the outer cylinder 40a. There is. This camp 43 is fixed by fitting its protrusion 43a into the fitting hole 44 of the outer cylinder 41a. Note that each of the above-mentioned fitting portions may be molded with a resin material or the like.

In this embodiment as well, the master cylinder 14 is fitted with the case body 40 of the brake switch 20 and is integrally mounted with an L-shaped structure, which is advantageous in terms of layout and space saving, and the number of parts can be reduced. Effects similar to those of the embodiment can be obtained.

Further, in this embodiment, since the case body 40 is embedded within the cylinder body 14c, an effect of making the cylinder more compact can be obtained.

In the above embodiments, the rear wheel braking device of a motorcycle was explained as an example, but the present invention can of course be applied to a front wheel braking device as well as a braking device for vehicles other than motorcycles.

〔Effect of the invention〕

As described above, according to the operation detection mechanism of the braking device according to the present invention, since the detection switch case is attached to the master cylinder so as to close the opening of the detection switch, it can be adopted regardless of the model, and is versatile. This has the effect of improving the performance, requires less installation space, facilitates layout, and reduces the number of parts.

[Brief explanation of the drawing]

1 to 4 are diagrams for explaining the operation detection mechanism of the motorcycle braking device according to the first embodiment of the present invention, in which FIG. 1 is a cross-sectional view of the master cylinder portion, and FIG. 1 is a sectional view taken along the line nn in FIG. 1, FIG. 3 is a side view of the operation detection mechanism, FIG. 4 is a right side view of a motorcycle in which the mechanism of this embodiment is adopted, and FIG. 5 is a second view of the second embodiment of the present invention. FIG. 3 is a sectional view of a master cylinder portion for explaining an operation detection mechanism according to an embodiment. In the figure, 10 is a braking device, 12 is a brake pedal,
14 is a master cylinder, 13b is a drive rod, 20 is a brake switch (detection switch), 31.40 is a case body, and 31d and 40C are through holes.

Claims (1)

[Claims] (1) In an operation detection mechanism for a vehicle braking device that generates hydraulic pressure in a master cylinder by operating a brake operating member and brakes wheels using the hydraulic pressure, a case of a unitized detection switch is attached to the master cylinder. The drive rod is mounted so as to close the drive rod insertion opening of the case, the drive rod extends toward the brake operating member from the through hole formed in the case, and the end of the drive rod is supported by the case. An operation detection mechanism for a vehicle braking device.