JP2502499Y2 - Hydraulic actuator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a hydraulically operated hydraulically operated device, and more particularly to a piping structure of the hydraulically operated device.

[Conventional technology and its problems]

Generally, as a hydraulic pressure actuating device, for example, in a vehicle equipped with a manual transmission, there is a clutch device that temporarily disconnects power transmission between the engine and the transmission during a gear shift operation.

By the way, this clutch device is generally operated hydraulically as disclosed in, for example, NISSAN Service Circular No. 442, and the hydraulic pressure (hydraulic pressure) generated in the master cylinder by the depression of the clutch pedal is The clutch disc is disengaged from the flywheel of the engine by being transmitted to the operating cylinder on the clutch unit side via the pressure pipe and operating the operating cylinder.

By the way, in such a hydraulic clutch device, when the clutch pedal is stepped on, the deflection of the flywheel due to the flexural vibration of the crankshaft causes the operating cylinder to urge through the spring which constantly biases the clutch disc in the connecting direction. Is input to the piston as vibration in the axial direction.

Then, the piston vibration propagates from the operating cylinder as hydraulic fluid in the hydraulic pipe as pressure pulsation,
Input to the master cylinder.

However, when the pressure pulsation is propagated from the hydraulic pipe to the master cylinder in this way, a moment acts on the master cylinder due to the exciting force generated at the bent portion of the hydraulic pipe, and the master cylinder moves toward the vehicle body side (usually Swinging vibration is evoked around the attachment part to the dash panel).

For this reason, the dash panel is vibrated by the swing vibration of the master cylinder, and in particular, the vibration frequency is about 200 to 4
When it is at a specific frequency such as 00 (Hz), an abnormal noise "go" is generated.

Therefore, in order to eliminate this abnormal noise, a practical application Sho 62-26889
As proposed by the applicant of the present application, it is conceivable to connect the clutch tube with a branch tube that resonates with the hydraulic vibration in the clutch tube.

In such a structure, since the branch pipe is provided in the middle of the clutch tube and the hydraulic pressure is filled in the branch pipe, it is necessary to provide a connector having an air bleeder for bleeding air at the tip of the branch pipe. There is.

By the way, although it was considered that the branch pipe was initially placed in the engine room, it is necessary to have a required length to effectively eliminate the go-sound. was there.

Therefore, as a result of various studies, it was attempted to pass the branch pipe under the front floor, and in this case, it was conceived to pass the branch pipe along the vertical wall portion of the center side member as a measure against road surface interference and chipping.

 The outline of the above structure is as shown in FIG.

That is, in this figure, the hydraulic clutch device 1 is used in a vehicle equipped with a manual transmission, and the master cylinder 2 is connected to a clutch pedal (not shown) via a push rod.
Is connected, and hydraulic pressure is generated in the master cylinder 2 by depressing the clutch pedal.

An operating cylinder 3 is provided on the clutch unit side (not shown).
Is interlocked with a not-shown withdrawal lever of the clutch unit, and when hydraulic pressure is supplied to the operating cylinder 3, the above-noted withdrawal lever is pressed through a pushrod also not shown, so that a pressure not shown in the drawing is provided. The clutch disc is pressed by the plate to release the clutch.

A clutch tube 5 for supplying hydraulic pressure is connected to the master cylinder 2, and the clutch tube 5 is connected to a clutch hose 6 projecting from the operating cylinder 3. The hydraulic pressure generated in the master cylinder 2 is the clutch tube 5 described above. Is supplied to the operating cylinder 3 via.

Reference numeral 7 denotes a branch pipe. The branch pipe 7 is connected to a hydraulic pressure supply path from the master cylinder 2 to the operating cylinder 3, that is, in the middle of the clutch tube 5 via a branch connector 8 to connect the clutch tube 5 and the clutch hose 6 to each other. The length is set to resonate at a specific frequency with the combined hydraulic vibration in the supply passage. A connector 10 having an air bleeder 9 for bleeding air is provided at the tip of the branch pipe 7.

The air vent connector 10 and the branch pipe 7 are provided along the center side member 12 below the front floor 11, and are fixed to the vertical wall of the center side member 12 by a plurality of clips 13, 13 ,. .
In the figure, 14 is a dash lower and 15 is a front side member. The arrow F indicates the front of the vehicle and U indicates the upper side of the vehicle.

However, in the above structure, the branch pipe 7
The length of can only be set to the length of the center side member 12, and therefore the center side member 12
However, in a short vehicle, it was not possible to expect effective cancellation of the go sound. Further, since the branch pipe 7 extends straight along the center side member 12, it becomes long and a large number of clips 13 for fixing the branch pipe 7 are required. Further, since the air vent connector 10 is far away from the path of the clutch tube 5, the air vent work cannot be performed at the same position as the air vent work of the existing master cylinder 2, operating cylinder 3, etc., and the workability is poor. There were challenges.

The present invention has been made in view of the above conventional problems. The sufficient length of the branch pipe is provided to effectively eliminate abnormal noise, the number of parts is reduced, the cost is reduced thereby, and the workability of bleeding is improved. It is an object of the present invention to provide a hydraulic clutch device aiming at the above.

[Means for solving the problem]

In order to achieve such an object, the present invention will be described with reference to the embodiments and its means will be described. The hydraulic operating device includes a master cylinder 2 and an operating cylinder 3 provided on the hydraulic operating unit side. Are connected with tube 5,
In the hydraulic pressure operating device, a branch pipe 7 is connected in the middle of the tube 5 via a branch connector 8 to resonate with hydraulic vibration in the hydraulic pressure supply passage 5 from the master cylinder 2 to the operating cylinder 3 An air bleeding connector 10 for the pipe 7 is arranged at substantially the same position as the master cylinder 2 or the operating cylinder 3 in the front-rear direction, and the branch pipe 7 is reciprocally pierced in a hairpin shape to remove air from the branch connector 8 and the branch pipe 7. It is characterized in that it is integrated with the connector 10.

[Action]

Since the present invention is constructed as described above, the air vent connector 10 of the branch pipe 7 can be placed in substantially the same position as the master cylinder 2 or the operating cylinder 3 in the front-rear direction to improve the workability of the air vent operation. By arranging them substantially at the same position and reciprocating the branch pipe 7 in a hairpin shape, it is possible to effectively eliminate abnormal noise, reduce the number of fixing parts 13 of the branch pipe 7, and reduce the cost. Since the branch pipe 7 is reciprocally piped in a hairpin shape, hydraulic vibration transmitted to the branch pipe 7 is transmitted to the branch connector 8, so that the vibration can be prevented from being transmitted in a wide range, and the branch pipe 7 is shaped like a hairpin. Since the branch connector 8 and the air vent connector 10 of the branch pipe 7 are integrated with each other by reciprocating piping, positioning workability of the tip of the branch pipe 7 can be improved. To become.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

It should be noted that the same parts and parts as those of the related art are designated by the same reference numerals and the description thereof will be omitted.

In FIGS. 1 and 2, a hydraulic clutch device 1 as a hydraulic actuator is used in a vehicle equipped with a manual transmission, and a master cylinder 2 is connected to a clutch pedal (not shown) via a push rod. The hydraulic pressure is generated in the master cylinder 2 by depressing the clutch pedal.

An operating cylinder 3 is provided on the clutch unit side (not shown).
Is interlocked with a not-shown withdrawal lever of the clutch unit, and when hydraulic pressure is supplied to the operating cylinder 3, the above-noted withdrawal lever is pressed through a not-shown push rod as well, so that a pressure not shown in the drawing is obtained. The clutch disc is pressed by the plate to release the clutch.

A clutch tube 5 for supplying hydraulic pressure is connected to the master cylinder 2, and the clutch tube 5 is connected to a clutch hose 6 projecting from the operating cylinder 3. The hydraulic pressure generated in the master cylinder 2 is the clutch tube 5 described above. Is supplied to the operating cylinder 3 via.

Reference numeral 7 denotes a branch pipe. The branch pipe 7 is connected to a hydraulic pressure supply path from the master cylinder 2 to the operating cylinder 3, that is, in the middle of the clutch tube 5 via a branch connector 8 to connect the clutch tube 5 and the clutch hose 6 to each other. The length is set to resonate at a specific frequency with the combined hydraulic vibration in the supply passage. A connector 10 having an air bleeder 9 for bleeding air is provided at the tip of the branch pipe 7.

An air vent connector for the branch connector 8 and the branch pipe 7.
10 is an integrated air release connector integrated branch connector
20 make up and mounted on the vehicle.

The branch pipe 7 is bent in a hairpin shape, is provided along the center side member 12 below the front floor 11, and has a plurality of clips 13, 13 ,. It is fixed.

FIG. 3 shows the branch connector 20 with the air vent connector integrated therein.
2 is a detailed view of the branch connector 8 and the air bleeding connector 10 are connected at substantially the center thereof and have a substantially H shape. In this figure, 20a and 20b are openings connected to the master cylinder 2 and the operating cylinder 3 sides of the clutch tube 5, and 20c and 20d are openings connected to the inlet side and the outlet side of the branch pipe 7, respectively. 20a, 20b, 20c
Is connected by a T-shaped passage 20e, and the opening 20d and the air bleeder 9 are connected by a linear passage 20f.

With this structure, the branch pipe 7 prevents the abnormal noise as usual, but since the branch pipe 7 is bent in a hairpin shape, it can be attached to the center side member (vehicle body) 12.
The occupied length in the above can be shortened to 1/2 of the conventional one, and the occupied length can be further extended, so that the substantial length can be taken and the abnormal noise is effectively eliminated. You can do that.

Also, as a result of the occupied length of the branch pipe 7 being shortened, the number of clips 13 for fixing the branch pipe 7 can be reduced, and the cost can be reduced by reducing the number of parts in this way.

Further, the branch pipe 7 is vented to the conventional branch connector 8
The path position of the clutch tube 5 which is a part, that is, the existing master cylinder 2 and operating cylinder 3
The work can be performed at the same position as the air bleeding work, and the workability is very good.

〔effect〕

As described above, according to the present invention, in the hydraulic operation device, the master cylinder and the operating cylinder provided on the hydraulic operation unit side are connected by the tube, and the branch connector is provided in the middle of the tube. In the hydraulic operation device in which a branch pipe that resonates with the hydraulic oscillation in the hydraulic pressure supply path from the master cylinder to the operating cylinder is connected, the air vent connector of the branch pipe is connected to either the master cylinder or the operating cylinder. The branch pipe is arranged at substantially the same position in the front-rear direction, and the branch pipe is reciprocally piped in a hairpin shape, and the branch connector and the air vent connector of the branch pipe are integrated with each other. By placing the master cylinder or operating cylinder at approximately the same position in the front and rear The workability of the air bleeding work can be improved, and by arranging them at substantially the same position in the front and rear and reciprocating the branch pipe in a hairpin shape, noise can be effectively eliminated and the number of parts for fixing the branch pipe can be reduced. Since the branch pipe is reciprocated in a hairpin shape, hydraulic vibration transmitted to the branch pipe can be transmitted to the branch connector, so that the vibration can be prevented from being transmitted in a wide range. By reciprocating the hairpin in the form of a hairpin and integrating the branch connector and the air vent connector of the branch tube, the positioning workability of the tip of the branch tube can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view showing an embodiment of the present invention, FIG. 2 is an explanatory view taken in the direction of arrow II in FIG. 1, and FIG. 3 is a branch with an air vent connector as a component. FIG. 4 is a detailed sectional view of the connector, and FIG. 4 is a schematic side view showing a conventional example. 1 ... hydraulic actuator, 2 ... master cylinder, 3 ...
Operating cylinder, 5 ... Tube, 7 ... Branch pipe, 8 ... Branch connector, 9 ... Air bleeder, 10 ...
… Air bleeding connector, 20 …… Air bleeding connector integrated type branch connector.

Claims (1)

(57) [Scope of utility model registration request] 1. A master cylinder and an operating cylinder provided on a hydraulic pressure unit side are connected by a tube, and a hydraulic pressure supply path from the master cylinder to the operating cylinder is provided in the middle of the tube via a branch connector. In a hydraulic operating device in which a branch pipe that resonates with hydraulic vibrations inside is connected, the air vent connector of the branch pipe is arranged at substantially the same position in the front and rear as either the master cylinder or the operating cylinder, and the branch pipe is in a hairpin shape. A hydraulic actuator, characterized in that the branch connector and the air vent connector of the branch pipe are integrated with each other by reciprocating piping.