JPH0131782Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic clutch operating device for operating a clutch of an automobile, and more particularly to hydraulic piping for preventing abnormal vibration of a clutch pedal.

In a hydraulic clutch operating device, when the clutch pedal is operated, that is, when the clutch is released, vibration hydraulic waves caused by engine vibration are transmitted from the clutch release cylinder to the clutch master cylinder, causing abnormal clutch pedal vibration and noise in the room. ing. As a countermeasure for this, conventional equipment inserts a rubber damper into the engine vibration transmission path, such as the push rod of the master cylinder, or makes the hydraulic piping a flexible hose that can expand and contract in the radial direction according to the vibration oil pressure. All of these measures involve a stroke cross (ineffective stroke) of the clutch pedal.

An object of the present invention is to provide a hydraulic clutch operating device that can prevent abnormal clutch pedal vibration and indoor noise without causing stroke cross.

In order to achieve this object, according to the hydraulic clutch operating device of the present invention, a pipe line having a closed end is connected to a clutch hydraulic pipe connecting a clutch master cylinder and a clutch release cylinder.

Embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, when the push rod 2 is pushed into the clutch master cylinder 3 as the clutch pedal 1 is depressed, operating hydraulic pressure is generated within the clutch master cylinder 3, and this operating hydraulic pressure passes through the hydraulic piping 4 to the clutch release. It is transmitted to the cylinder 5, and the push rod 6 is pushed out. The tip of the push rod 6 is in contact with the release fork of the clutch, and the clutch is released by pushing the push rod 6.

FIG. 2 shows an intermediate range of the hydraulic piping 4. As shown in FIG. A pipe 7 having a predetermined length l is closed at one end by a cap 8, and is connected to the middle of the hydraulic piping 4 via a T-shaped joint 9 at the other end.

When the clutch is operated, a vibration hydraulic wave is generated in the clutch release cylinder 5 due to engine vibration.
This oscillating hydraulic wave attempts to be transmitted to the clutch master cylinder 3 via the hydraulic piping 4. However, since the phase of the reflected wave reflected at the closed end of the tube 7 and returned to the T-type joint 9 and the phase of the oscillating hydraulic wave that came from the clutch release cylinder 5 to the T-type joint 9 are out of phase by half a wavelength, Both waves cancel each other and T
The transmission of oscillatory hydraulic waves from the mold joint 9 towards the clutch master cylinder 3 is significantly suppressed. In this way, abnormal vibrations of the clutch pedal and abnormal noises in the driver's cabin can be suppressed when the clutch pedal is operated.

As described above, according to the present invention, the hydraulic piping to the clutch release cylinder is connected to one of the two ends located on a straight line among the three ends of the T-shaped joint interposed in the middle of the clutch hydraulic piping. is connected,
A pipe line with a closed end is connected to the other end, and hydraulic pipes from the clutch master cylinder are connected to the remaining one end, and these hydraulic pipes are filled with oil. . This results in
Vibrating hydraulic waves transmitted from the clutch release cylinder side through the hydraulic piping go straight toward the pipe having the closed end, and return when they hit the closed end of the pipe, resulting in a hydraulic reflected wave and a clutch release. The oscillating hydraulic waves from the cylinder cancel each other out. That is, these hydraulic waves are canceled by each other between the clutch release cylinder and the conduit having the closed end, which are located in a straight line through the T-joint, so that they are not transmitted through the remaining end of the T-joint. The vibration hydraulic waves transmitted to the clutch master cylinder are effectively suppressed, and the abnormal vibration of the clutch pedal when the clutch pedal is depressed and the accompanying abnormal noise inside the vehicle are significantly reduced.
Furthermore, since no elastic member is inserted into the clutch pedal operating force transmission path to prevent abnormal vibrations, stroke crosses are prevented from occurring.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the entire hydraulic clutch operating device, and FIG. 2 is a configuration diagram of an embodiment of the present invention. 3...Clutch master cylinder, 4...Hydraulic piping, 5...Clutch release cylinder, 7...
Pipe, 8... Cap, 9... T-type fitting.

Claims (1)

[Scope of utility model registration request] There is a T in the clutch hydraulic piping that connects the clutch master cylinder and clutch release cylinder.
A type joint is interposed, and of the three ends of this T-type joint, the hydraulic piping to the clutch release cylinder is connected to one of the two ends located on a straight line, and the other one is connected to the hydraulic piping to the clutch release cylinder. A pipe line having a closed end is connected to the hydraulic pipe from the clutch master cylinder to the remaining end, and the hydraulic pipe is filled with oil. Hydraulic clutch operating device.