JPH05438Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hydraulic master cylinder device that hydraulically operates the brakes of vehicles such as motorcycles, tricycles, and automobiles.

[Conventional technology]

The hydraulic master cylinder device used for the rear wheel brakes of motorcycles and tricycles is, for example,
As disclosed in Japanese Patent No. 35095, a vertical cylinder body in which a piston for generating hydraulic pressure is inserted into a cylinder hole is attached to a vehicle body frame.

A push rod that pushes the piston is arranged vertically below the cylinder body, and the lower end of the push rod is connected to the rear end of the brake pedal, which is pivotally connected to the body frame. When the pedal is depressed, the push rod moves upward and the piston is pushed into the cylinder hole, generating hydraulic pressure in a hydraulic pressure chamber defined at the upper bottom of the cylinder hole. This generated hydraulic pressure is further sent to the rear wheel brakes via the brake hose, and hydraulically operates the rear wheel brakes to perform a braking action on the rear wheels.

A brake lamp switch is fixed to the cylinder body on a switch bracket protruding along the push rod, and a switch operating plate for operating the brake lamp switch is attached to a plate stopper fixed to the push rod. It is provided so as to be pressed against it by a spring.

[The problem that the idea attempts to solve]

In such a configuration, the switch bracket and switch operating plate protrude from the cylinder body and push rod, and the brake light switch and spring are exposed to the outside, so they are not exposed to external forces such as flying stones or are exposed to mud. This is not desirable as it may get wet with water or rainwater. For example, if a brake light switch or switch bracket is hit by a flying stone or kicked by a foot, it may become incorrectly set or damaged, and if it gets wet with mud or rain water, it may rust or malfunction, reducing its durability. Deteriorate.

Furthermore, a lead wire is connected to the brake lamp switch toward the rear of the vehicle body, and it is desirable that the lead wire is routed as short as possible and that there are few exposed parts to the outside.

The present invention was developed in view of the above circumstances, and its purpose is to protect brake lamp switches, lead wires, and connectors attached to the cylinder body from external forces, mud, and rainwater. It is an object of the present invention to provide a hydraulic master cylinder device.

[Means to solve the problem]

In order to achieve the above object, the present invention forms a cylinder hole in a cylinder body into which a piston for generating hydraulic pressure is inserted, and a boss hole communicating with the cylinder hole, and a reservoir hose is connected to the boss hole. In a brake hydraulic master cylinder device in which a connecting connector is fitted, a brake lamp switch is fixed to the cylinder body, and a lead wire connected to the brake lamp switch is arranged along the reservoir hose. , the reservoir hose and lead wire, and the brake lamp switch and connector are integrally covered with a protector that is attached to the cylinder body.

[Effect]

The brake light switch, reservoir hose, lead wire, and connector attached to the cylinder body are covered by a protector that covers them all together, so they are protected from the effects of external forces such as flying stones and foot kicks, and from rainwater and dust. Intrusion is minimized.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

A brake pedal 1 that operates a rear wheel brake of a two-wheeled or tricycle is rotatably provided in the vertical direction with its intermediate portion being pivotally supported on a vehicle body frame (not shown) by a rotation support shaft 2. A hydraulic master cylinder 3 that generates hydraulic pressure when the brake pedal 1 is depressed.
A vertical cylinder body 4 is also attached to the vehicle body frame above the rear end 1b of the brake pedal 1.

A pedal plate 5 for depression operation is fixed to the front end 1a of the brake pedal 1, and the rear end 1b
is connected by a pin 7 to the lower end of a push rod 6 which is disposed vertically between the cylinder body 4 and the cylinder body 4. A return spring 8 is stretched between the middle part of the brake pedal 1 and the vehicle body frame.
The brake pedal 1 and the push rod 6 are always urged in the non-operating direction (counterclockwise in FIG. 1) by the tension of the return spring 8.

A cylinder hole 9 formed in the cylinder body 4 by opening downwardly has a piston 10 for generating hydraulic pressure.
is fluid-tightly and movably inserted into the cylinder hole 9.
A return spring 12 that urges the piston 10 in the non-operating direction is compressed in a hydraulic pressure chamber 11 defined between the upper bottom portion of the piston 10 and the piston 10.

The cylinder body 4 has flanges 4a, 4a for mounting on the vehicle body, on one side above and below, and on the other side.
A boss portion 4b for connecting the reservoir is provided in a protruding manner. A brake lamp switch 13 is fixed to the lower side of the boss portion 4b, and furthermore, a rotary lever 14 is pivotally mounted to the lower side of the brake lamp switch 13.

The boss portion 4b is provided with a boss hole 17 that is open and communicates with the cylinder hole 9 via a relief port 15 and a supply port 16.
7 is fitted with an L-shaped connector 20 for connecting a reservoir hose 19 of a separately arranged reservoir 18, and the hydraulic fluid stored in the reservoir 18 is passed through the reservoir hose 19 and the connector 20 to the cylinder hole 9. It is now starting to supply supplies to

The rotating lever 14 is located below the boss portion 4b.
It is pivotally connected by a support shaft 21 between a pair of lever support arms 4c, 4c provided vertically protruding from the cylinder body 4. The brake light switch 13 is connected to the boss part 4
The mounting piece 13 is disposed along the lower wall of the boss portion 4b in the gap between the lever support arms 4c and the lever support arms 4c.
a is attached to the cylinder body 4 with screws 22.

A lead wire connector 23a is connected to the brake lamp switch 13.
The lead wire 23 drawn out from the connector 20 is arranged upward along the reservoir hose 19 from the straight pipe portion 20a of the connector 20.

The rotating lever 14 has a first arm 14a that pushes the piston 10, and a second arm 14b that restricts the backward movement of the lever 14 and operates the brake lamp switch 13. As mentioned above, the lever support arm 4c,
It is pivoted to 4c. The tip of the first arm 14a interposed between the piston 10 and the push rod 6 is
It is bifurcated into a connecting piece 14c and an acting piece 14d, and the tip of the push rod 6 is swingably connected to the connecting piece 14c with a pin 24, and the other acting piece 14d has an arcuate outer surface. It is arranged to support the rear end of the piston 10 which is urged by the return spring 12.

A stopper 14e is provided at an intermediate portion of the first arm 14a to protrude toward the cylinder body 4 side. This stopper 14e is set so that the rotary lever 14 is in the operating direction (first
When the piston 10 is pushed in by rotating clockwise (in the figure), it comes into contact with the lower end surface 4d of the cylinder body 4, restricting the amount of rotation of the rotating lever 14, and preventing overstroke of the piston 10. .

On the other hand, in the second arm 14b, the rotary lever 14 is pushed by the piston 10 which is elastically urged by the return spring 8 of the brake pedal 1 and the return spring 12 of the hydraulic pressure chamber 11, and rotates the support shaft 21. When the pivot lever 14 is pivoted in the non-operating direction (counterclockwise in FIG. 1), it comes into contact with the lever receiving piece 4e protruding from the boss portion 4b, and restricts the backward limit of the pivoting lever 14. At the same time, the actuator 13b of the brake lamp switch 13 protruding from the lever receiving piece 4e is pushed in to turn the switch 13 OFF.

the brake lamp switch 13 and the rotating lever 14, the connector 20, the reservoir hose 19,
The lead wire 23 is integrally covered with a protector 25 attached to the cylinder body 4. This protector 25 is made of a flexible material such as rubber with appropriate rigidity, and is formed to have an outer shape substantially similar to the outer shape of the cylinder body 4 to which these members are attached, as shown in FIGS. 4 and 5. A slit 25a is formed in the cylinder axial direction on one side of the cylinder body 4 facing the flange 4a to facilitate installation.

The protector 25 formed as described above is inserted from the upper side of the cylinder body 4, in which the reservoir hose 11 is connected to the connector 20, while expanding the slit 25a, as shown in FIGS. 1 and 2. From the boss portion 4b of the body 4 to the lower end surface 4
It is applied covering up to d.

As a result, the brake lamp switch 13 and the connector 20 are entirely covered by the protector 25, and the upper half of the rotary lever 14 from the second arm 14b to the vicinity of the support shaft 21 is covered by the protector 25. be exposed. In addition, the reservoir hose 19 is covered with the long pipe portion 25b of the protector 25 up to the upper end connected to the reservoir 18, and the lead wire 23 is
Vertical ribs 25c bulging along the long pipe portion 25b
It is inserted into the inside and pulled out from the upper end of the rib 25c. In addition to guiding and protecting the lead wire 23, the vertical rib 25c serves as a shock absorber against external forces, reinforcing the long tube portion 25b, and protecting the reservoir hose 19.

The protector 25 attached to the cylinder body 4 in this way and the second arm 14b of the rotating lever 14
There is a gap 2 between them that allows rotation of the arm 14b.
5d is provided, and flanges 4a, 4a of the cylinder body 4 are provided to protrude from the slit 25a.

The present embodiment is constructed as described above, and when the brake pedal 1 is depressed, the rear end 1b pushes up the push rod 6, and the rotating lever 14
It rotates clockwise in FIG. 1 about the support shaft 21, the second arm 14b separates from the boss portion 4b, turns on the brake lamp switch 13, and the operating piece 14d moves the piston 10 upward. and hydraulic chamber 1
1 to generate hydraulic pressure. The hydraulic pressure generated in the hydraulic pressure chamber 11 is sent to the rear wheel brake from the discharge port 26 via the brake hose, and the rear wheel brake is operated by hydraulic pressure to regulate the rear wheel.

Furthermore, when the brake pedal 1 is released, the rotary lever 14 is pushed by the piston 10 which is elastically urged by the return spring 8 of the brake pedal 1 and the return spring 12 of the hydraulic pressure chamber 11. The second arm 14b rotates counterclockwise in FIG.
However, the lever 14b comes into contact with the lever receiving piece 4e and the backward limit is restricted, and the lever 14b further pushes in the actuator 13b and turns the brake lamp switch 13 OFF.

On the other hand, if the brake pedal 1 is depressed with excessive force, the stopper 14e of the rotary lever 14 will
It comes into contact with the lower end surface 4d of the cylinder body 4, restricts the amount of rotation of the rotary lever 14, and prevents the piston 10 from overstroke. As a result, the piston cups 10a, 10 fitted onto the piston 10
Damage to a and the return spring 12 in the hydraulic chamber 11 is prevented.

In this embodiment, the push rod 6 and the piston 1 are
Since the rotary lever 14 is interposed between the push rod 6 and the cylinder axis, the rocking and swinging of the push rod 6 away from the cylinder axis can be suppressed by the connection with the rotary lever 14. As a result, the piston 10 can be pushed smoothly, and the brake lamp switch 1 can be moved smoothly.
3 can also be operated without being affected by the swinging of the push rod 6, so the second arm 14b
This prevents the actuators 13b from being strained and causing wear and tear on each other, and from causing a shift in the timing of the operation of the brake lamp switch 13.

Furthermore, since the brake lamp switch 13, rotary lever 14, connector 20, reservoir hose 19, and lead wire 23 are integrally covered with a protector 25 attached to the cylinder body 4, they are protected against flying stones, kicks by feet, etc. Deformation, loosening, and damage to these members due to external forces are suppressed to the utmost, and, for example, in the case of the brake lamp switch 13, missetting is prevented. In addition, since the flexible reservoir hose 19 and the lead wire 23 disposed along the flexible reservoir hose 19 are covered by the long tube portion 25b of the protector 25, the reservoir hose 19 has increased strength against external forces, and the lead wire In 23,
This covering eliminates the risk of wire breakage due to hooking, etc., and also makes it easier to route the wires and eliminates the need for clamps.

Furthermore, the protector 25 can prevent rainwater and mud from entering the cylinder body 4 and the above-mentioned components attached to it, eliminating rust and corrosion and malfunctions caused by these, resulting in smooth and reliable operation. We can expect good operation.

The protector of the present invention only needs to have a shape that covers at least the reservoir hose, lead wire, brake lamp switch, and connector. For example, the protector of the present invention may be of a shape that covers at least the reservoir hose, the lead wire, the brake lamp switch, and the connector. It can also be covered and protected to prevent union bolts and brake hoses from loosening. Furthermore, if the shape of the protector is complicated, the protector may be formed of a plurality of divided bodies and these divided bodies may be joined together.

In addition to the rear wheel brakes of motorcycles and tricycles shown in the above embodiments, the present invention is also applicable to the front wheels of motorcycles and tricycles and passenger cars.

[Effect of idea]

As described above, the brake hydraulic master cylinder device of the present invention has a brake lamp switch fixed to the cylinder body, a lead wire connected to the brake lamp switch, and a lead wire connected to the brake lamp switch arranged along the reservoir hose. By integrally covering the reservoir hose, lead wire, brake light switch, and connector that connects the reservoir hose to the cylinder body with a protector that covers the cylinder body, these parts attached to the cylinder body can be protected from flying stones. It protects the parts from external forces such as foot kicks, prevents deformation, loosening, and damage, and allows each member to fully perform its functions.

Furthermore, this protector prevents rainwater and mud from entering the cylinder body and the above-mentioned components, eliminating rust and corrosion and malfunctions caused by these, resulting in stable operation and improved durability. I can figure it out.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a sectional front view of the hydraulic master cylinder device, Fig. 2 is a partially sectional side view, Fig. 3 is a side view, and Fig. 4 is a single protector. FIG. 5 is a perspective view of the protector viewed from the opposite direction from FIG. 4. 1...Brake pedal, 3...Hydraulic pressure master cylinder, 4...Cylinder body, 4b...Boss part,
6...Push rod, 9...Cylinder hole, 10
... Piston, 13 ... Brake lamp switch, 13b ... Actuator, 14 ... Rotating lever, 1
7... Boss hole, 18... Reservoir, 19... Reservoir hose, 20... Connector, 20a... Straight pipe section, 23... Lead wire, 23a... Lead wire connector, 25... Protector, 25a... Slit, 25b...long pipe section, 25c...vertical rib.

Claims (1)

[Scope of utility model registration request] A brake hydraulic master in which a cylinder hole into which a piston for generating hydraulic pressure is inserted and a boss hole communicating with the cylinder hole are formed in the cylinder body, and a connector for connecting a reservoir hose is fitted into the boss hole. In the cylinder device, a brake lamp switch is fixed to the cylinder body, a lead wire connected to the brake lamp switch is arranged along the reservoir hose, and the reservoir hose and the lead wire are connected to the brake lamp switch. A hydraulic master cylinder device for a brake, characterized in that a switch and a connector are integrally covered with a protector attached to a cylinder body.