JPS628652Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an oil squeezing device for a hydraulic clutch.

Conventionally, this type of hydraulic clutch operates a master cylinder by operating a clutch pedal, and the hydraulic pressure generated by this is transferred to a slave cylinder attached to the clutch body via an oil pipe.
The clutch was operated by transmitting the message to the cylinder.

However, in such a hydraulic clutch, if the clutch is suddenly engaged, the engine may stop or the engine may not start smoothly.

In addition, in order to eliminate such drawbacks, a valve is installed on the master cylinder side, and a slave cylinder is installed.
Some have been designed to reduce the speed of oil movement from the cylinder side to the master cylinder side, thus delaying clutch engagement.

However, with such a structure that delays clutch engagement, even when the oil temperature is relatively high, when the oil temperature is low, the viscosity of the oil increases and the throttling effect of the valve is reduced. It became excessive, and the clutch connection tended to be too slow.

The purpose of this invention was to prevent the clutch from suddenly engaging when starting and shifting the vehicle, thereby improving starting operability, and to prevent the viscous resistance of the clutch oil even when the temperature of the clutch oil is low. To provide an oil squeezing device for a hydraulic clutch, which enables a valve to be smoothly opened and closed without being affected by the temperature of the clutch oil, and always provides an appropriate squeezing effect of the clutch according to the temperature of the clutch oil.

With these issues in mind, the oil squeezing device for the hydraulic clutch of this invention has a valve casing,
A partition plate that divides the inside of the valve casing into a master cylinder side chamber and a slave cylinder side chamber, a tread-in oil supply orifice formed in the partition plate, and a tread-in oil supply orifice that opens and closes the tread-in oil supply orifice from the master cylinder side chamber. A one-way system that flows oil into the side chamber of the slave cylinder.
An open valve formed on the valve and its partition plate
An orifice, a low-temperature oil return orifice formed in the partition plate, a pin hole formed at an appropriate position in the partition plate, one end fixed to the valve casing side, and the other end facing the pin hole. A spiral bimetal that is extended to a position and placed in the side chamber of the master cylinder, has an outer diameter smaller than the inner diameter of the pin hole, and is fitted into the pin hole while maintaining an appropriate gap within the pin hole. a flanged connecting rod having one end protruding into the master cylinder side chamber and fixed to the other end of the spiral bimetal, and the other end protruding into the slave cylinder side chamber; and the flanged connecting rod. and a bimetallic valve fixed to the other end of the rod for opening and closing the cold oil return orifice.

Hereinafter, preferred embodiments of the oil squeezing device for a hydraulic clutch according to this invention will be described with reference to the drawings.

1 to 4 show a tenth embodiment of the oil squeezing device for the hydraulic clutch of this invention.

The oil squeezing device 10 for this hydraulic clutch is
A valve casing 11 and a partition plate 1 that partitions the inside of the valve casing 11 into a master cylinder side chamber 13 and a slave cylinder side chamber 14.
2, a tread oil supply orifice 31 formed in the partition plate 12, and a one-way valve that opens and closes the tread oil supply orifice 31 to flow oil from the master cylinder side chamber 13 to the slave cylinder side chamber 14. 15, an open orifice 16 formed in the partition plate 12,
A low-temperature oil return orifice 17 is formed in the partition plate 12, a pin hole 32 is formed at an appropriate position in the partition plate, one end is fixed to the valve casing 11, and the other end is fixed to the pin hole 32. The master cylinder side chamber 13 is extended to the facing position.
The spiral bimetal 19 is disposed in the pin hole 32 and has an outer diameter smaller than the inner diameter of the pin hole 32. A flanged connecting rod 39 that projects into the master cylinder side chamber 13 and is fixed to the other end of the spiral bimetal 19, and whose other end projects into the slave cylinder side chamber 14; A bimetallic valve 18 fixed to the other end opens and closes the cold oil return orifice 17 thereof.
It is composed of.

The valve casing 11 consists of a casing body 20 and a cover 21, each having through holes 22 and 23 formed approximately in the center thereof, and these through holes 22 and 23 being threaded.

A stepped portion 24 is formed along the inner circumference at the open inner end of the casing body 20, and a stepped portion 24 of the casing body 20 is formed at the open inner end of the cover 21. A rib 25 is integrally formed around the rib 25 so as to be slightly fitted into the rib 25 .

Further, a seal groove 26 is formed along the periphery of the cover 21 at a position slightly outside the rib 25.

Furthermore, outward flanges 27 and 28 are formed at the open ends of the casing body 20 and the cover 21, respectively, and the flanges 27 and 28 are provided with screw holes 29 and through holes at appropriate intervals. 30 are formed respectively.

The partition plate 12 is formed into a circular shape so as to be fitted into the stepped portion 24 of the casing body 20, and has a stepped oil supply orifice 31 formed on one side,
On the other hand, an open orifice 16 and cold oil return orifices 17, 17 are formed slightly above the open orifice 16, respectively.

Further, a pin hole 32 is formed at a position slightly below the center of the partition plate 12.

That is, the partition plate 12 described above is fitted into the stepped portion 24 of the casing body 20, and when the cover 21 is attached to the casing body 20, the inside of the valve casing 11 is mastered.
Cylinder side chamber 13 and slave cylinder side chamber 14
It is arranged so that it is divided into

A one-way valve 15 is attached to the stepped oil supply orifice 31 of the partition plate 12 formed in this way, as shown in FIG.

The one-way valve 15 includes a valve rod 33 having a fitting groove 34 formed on one side and a valve body 35 on the other side;
3, a cap-shaped rubber seal 36 fitted into the fitting groove 34 of the valve rod 33, and a coil spring 38 whose one end is placed at the end of the valve rod 33 and the other end is placed at the inner wall 37 of the cover 21. are doing.

That is, the one-way valve 15 is
The slave cylinder side chamber 1 in the valve casing 11 is configured to open and close a tread oil supply orifice 31 formed in the partition plate 12.
A clutch pedal (not shown) is disposed between the partition plate 12 and the cover 21 on the 4 side, and a clutch pedal (not shown) is depressed by pedal force, and oil is supplied by a master cylinder (not shown). When sent to the master cylinder side chamber 13, a portion of the oil in the master cylinder side chamber 13 is transferred to the tread oil supply orifice 31 and the valve rod 3.
3 and pushes the rubber seal 36 against the coil spring 38.
The tread oil supply orifice 31 is opened to allow oil to flow from the master cylinder side chamber 13 to the slave cylinder side chamber 14 through the tread oil supply orifice 31.

In this way, when stepping oil is sent from that master cylinder, this one-way valve 1
5 through its open orifice 16 and cold oil return orifice 17,17.
In addition to the oil flowing from the cylinder side chamber 13 to its slave cylinder side chamber 14, oil flows from its master cylinder side chamber 13 to its slave cylinder side chamber 14 via its tread oil supply orifice 31, thus - Sends a large amount of oil to the cylinder to disengage the clutch quickly and smoothly.

Also, the flow of the pedal oil may stop, or the pedal force may be removed from the clutch pedal.
When the return oil flows from the slave cylinder to the slave cylinder side chamber 14, the one-way valve 15 closes the tread oil supply orifice 31 and closes the tread oil supply orifice 3.
1 to block the return oil flowing from its slave cylinder side chamber 14 to its master cylinder side chamber 13, mainly through its open orifice 16.
The oil flows from the slave cylinder side chamber 14 to the master cylinder side chamber 13 through. As such, the one-way valve 15 slowly returns oil from its slave cylinder side chamber 14 to its master cylinder side chamber 13, allowing smooth engagement of the clutch.

Furthermore, in the pin hole 32 of the partition plate 12,
A flanged connecting rod 39 is inserted. That is, since the flanged connecting rod 39 is configured to have an outer diameter slightly smaller than the inner diameter of the pin hole 32, the connecting rod 39 is inserted into the pin hole 32 while maintaining an appropriate gap within the pin hole 32. It is inserted from the master cylinder side chamber 13 side.

In other words, the flanged connecting rod 39
is inserted loosely within the pin hole 32 so that it can rotate freely.

Further, one end of the bimetallic valve 18 is fitted to the other end of the flanged connecting rod 39 inserted in this way, that is, the portion protruding toward the slave cylinder side chamber 14, and the flanged connecting rod 39 is fitted with one end of the bimetal valve 18. The bimetallic valve 18 is secured to the flanged connecting rod 39 by crimping the other end of the connecting rod 39.

Further, a groove is formed at one end of the flanged connecting rod 39 that protrudes into the master cylinder side chamber 13, and the other end of the spiral bimetal 19 is inserted into the groove. The spiral bimetal 19 is attached to one end of the spiral bimetal 19 and has a built-up portion 4 formed in the valve casing 11.
It is screwed to 0.

That is, if the spiral bimetal 19 is attached to one end of the flanged connecting rod 39 in this way, the flanged connecting rod 39
is normally supported by the spiral bimetal 19 without substantially contacting the inner surface of the pin hole 32, and therefore the flanged connecting rod 39 is supported by the spiral bimetal 19 without substantially contacting the inner surface of the pin hole 32. It rotates smoothly as it expands and contracts.

The bimetallic valve 18 is located in the slave cylinder side chamber 14 with the partition plate 1
2 to open and close its cold oil return orifices 17,17. In other words, when the oil is hot, the bimetal 19 of the valve 18 expands so that the low temperature oil return orifice 17,
17 is closed, and when the oil is at a low temperature, the bimetal 19 shrinks and rotates to open the low temperature oil return orifices 17, 17, but the low temperature oil return orifices 17, 17 are closed. A stopper pin 41 is attached to the partition plate 12 to prevent it from rotating beyond a certain level.

Further, in this valve 18, when stepping oil is sent from the master cylinder with the low temperature oil return orifices 17, 17 closed, the oil passes through the low temperature oil return orifices 17, 17 and enters the master cylinder side chamber 13. However, return oil from the slave cylinder does not flow from the slave cylinder side chamber 14 to the master cylinder side chamber 13 via the cold oil return orifices 17,17.

In this way, this valve 18 is driven by a bimetal 19 that expands and contracts depending on the oil temperature, and opens and closes the low temperature oil return orifices 17, 17.
Therefore, even if the viscosity of the oil changes depending on the oil temperature, the amount of return oil flowing from the slave cylinder side chamber 14 to the master cylinder side chamber 13 via the low temperature oil return orifices 17, 17 can be adjusted. , by constantly obtaining an appropriate throttle effect for the clutch, preventing sudden engagement of the clutch, and ensuring that the clutch always has an appropriate engagement timing, thereby preventing artificial clutch/pedal operation. To enable a clutch to be connected easily and smoothly without being affected.

The spiral bimetal 19 has one end screwed to the built-up portion 40 of the valve casing 11, and the other end fixed to the flanged connecting rod 39, and is arranged in the master cylinder side chamber. . In particular, as can be seen from FIGS. 1 and 2, the other end of the bimetal 19 is formed with a bent portion, and the bent portion projects into the master cylinder side chamber 13 of the flanged connecting rod 39. It is inserted into a groove formed in the section and fixed to the connecting rod 39 thereof.

The bimetal 19 is thus connected to the valve 18 via the connecting rod 39,
The clutch oil expands and contracts depending on the temperature of the clutch oil, rotates the valve 18, and causes the valve 18 to open and close the cold oil return orifices 17, 17, and throttle.

Spiral bimetal 1 as described above
9. The partition plate 12 to which the bimetal valve 18, one-way valve 15, etc. are attached is fitted into the stepped portion 24 of the casing body 20, and further,
An oil seal 4 is installed in the seal groove 26 of the cover 21.
2 is fitted, the casing main body 20 and the cover 21 are put together, and the bolts 43 are passed through the through holes 30 and further tightened into the screw holes 29 to be integrated.

Of course, a spring washer 44 and a flat washer 45 are fitted between the head of the bolt 43 and the cover 21.

Further, joints 46 and 47 are screwed into the through holes 22 and 23 of the casing body 20 and the cover 21, which are thus integrated, and are tightened with nuts 48 and 49, respectively.

Its joint 46 is connected to an oil conduit (not shown) on the master cylinder side, and its joint 47 is connected to an oil conduit (not shown) on the slave cylinder side.

Next, oil squeezing device 1 for this hydraulic clutch.
The effect of 0 will be explained.

When the oil in the valve casing 11 is hot, the spiral bimetal 19 is extended and the bimetallic valve 18 is rotated to place the cold oil return orifices 17, 17 in a closed condition, and in such a condition the clutch is closed. - When the pedal (not shown) is stepped on, pressure oil is sent from the master cylinder (not shown) into the master cylinder side chamber 13, and at this time, the one-way valve 15 and the open valve are
Pressurized oil is passed through the orifice 16 at a relatively high speed and sent to a slave cylinder (not shown) to disengage the clutch. Furthermore, when the pedal force is released from the clutch pedal, the pressure oil from the slave cylinder side flows back, and the speed is moderately decelerated only by the open orifice 16, and its resistance causes a moderate delay in engagement of the clutch. .

Further, when the oil in the valve casing 11 is low temperature, the spiral bimetal 19 contracts, and the bimetal valve 18 is rotated in the opposite direction.
Even when the low temperature oil return orifices 17, 17 are left open and the oil has a high viscosity, when the clutch pedal (not shown) is depressed, the master cylinder (not shown) will release the master oil. Pressure oil is sent into the cylinder side chamber 13, passing through the one-way valve 15, the open orifice 16, and the cold oil return orifices 17, 17 at a relatively high speed, to the slave cylinder (not shown) side. Pressure oil is sent to and the clutch is disengaged.
Furthermore, when the pressing force from the clutch pedal is released, the pressure oil from the slave cylinder side flows backward and is moderately decelerated by the open orifice 16 and the low temperature oil return orifices 17, 17.
The resistance causes a moderate delay in clutch engagement.

In particular, since the flanged connecting rod 39 is fitted into the pin hole 32 with an appropriate gap, the connecting rod 39 can resist the viscous resistance of the oil even when the viscosity of the oil is high. The valve 18 is rotated smoothly without being affected, and as a result, the valve 18 is rotated smoothly.

The above-mentioned low-temperature oil return orifice 17 has been described as having two formed, but a plurality of them may be provided in parallel so as to change the flow velocity depending on the viscosity at the oil temperature, or they may be formed in the shape of a long hole. Furthermore, the low-temperature oil return orifice 17 and the open orifice 16 are not formed separately, but are formed integrally into a long hole shape, and a portion thereof is opened when the bimetal valve 18 is in a stopped state. - It is also possible to configure the opening area to increase according to the rotation of the valve 18.

According to this invention described above, the inside of the valve casing is divided into a master cylinder side chamber and a slave cylinder side chamber by a partition plate, and an oil supply orifice is formed in the partition plate by stepping into it. A one-way valve is installed, and the partition plate has an open orifice and a cold oil return orifice formed therein, and a bimetallic valve for opening and closing the cold oil return orifice is installed in the partition plate, and further, The flanged connecting rod for rotating the bimetallic valve has an outer diameter smaller than the inner diameter of the pin hole, and is fitted into the pin hole while maintaining an appropriate gap within the pin hole, so the hydraulic clutch When placed in the oil conduit, the clutch
Even when the oil temperature is low, the connecting rod rotates smoothly without being affected by the viscous resistance of the clutch oil, and accordingly the valve opens and closes smoothly. According to The shock caused by the engagement of the clutch is alleviated and the operability is improved, which is very useful for hydraulic clutches.

[Brief explanation of the drawing]

Fig. 1 is a front view with the cover removed showing a specific example of an oil squeezing device for a hydraulic clutch according to this invention, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a one-way - A partial sectional view showing how the valve is installed, and FIG. 4 is a partial sectional view showing how the partition plate forming the low temperature oil return orifice is installed. 11... Valve casing, 12... Partition plate, 13... Master cylinder side chamber, 14... Slave cylinder side chamber, 15... One-way...
Valve, 16...Open orifice, 17...
...Low temperature oil return orifice, 18...Bimetal
Valve, 19...Spiral bimetal, 32
...Pin hole, 38...Flanged connecting rod.

Claims (1)

[Scope of Claim for Utility Model Registration] A valve casing, a partition plate that divides the inside of the valve casing into a master cylinder side chamber and a slave cylinder side chamber, a tread-in oil supply orifice formed in the partition plate, and a tread-in oil supply orifice formed in the partition plate; A one-way valve that opens and closes an oil supply orifice to flow oil from its master cylinder side chamber to its slave cylinder side chamber, an open orifice formed in its partition plate, and a low-temperature oil formed in its partition plate. a return orifice, a pin hole formed at an appropriate position in the partition plate, and one end fixed to the valve casing side;
A spiral bimetal whose other end is extended to a position facing the pin hole and placed in the master cylinder side chamber, and has an outer diameter smaller than the inner diameter of the pin hole, and has an appropriate gap in the pin hole. with a flange that is fitted into the pin hole of the spiral bimetal with one end protruding into the master cylinder side chamber and fixed to the other end of the spiral bimetal, and the other end protruding into the slave cylinder side chamber. A connecting rod and a bimetallic member secured to the other end of the flanged connecting rod that opens and closes its cold oil return orifice.
Oil squeezing device for hydraulic clutches, including valves.