JP2000074098A - Temperature sensitive fluid fan coupling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a co-rotation phenomenon from generating by providing a pair of weirs on both sides of a feed hole so as to stick to both the inner wall of an oil sump chamber and a partition plate. SOLUTION: A pair of weirs 15 are provided on both sides of a feed hole 10-1 provided on a partition plate 4 and on the position in the circumferential direction of a rotary shaft body 1 so as to stick to both the inner circumferential wall of an oil sump chamber 5 and the partition plate 4 in the radial direction. By provoding a pair of the weirs 15 in this way, these weirs 15 let flow oil in the oil sump chamber 5 to the vicinity of the feed hole 10-1 by a required quantity, and function to store the remaining oil in the oil sump chamber 5. Hereby, oil which is necessary to insure durability of oil and absorb error in manufacturing, but excessive for a countermeasure to co-rotation, can be held not in the gap part 3-2 on this side of the torque transmitting gap part 3-1 in a torque transmission chamber 3 but in the oil sump chamber 5. Consequently, a co-rotation phenomenon on the sealed box 2 side due to this excess oil can be prevented from generating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a temperature-responsive fluid-type fan / coupling apparatus for controlling the rotation of a fan for cooling an engine in an automobile or the like and constantly supplying a cooling air flow according to a running state to the engine. It is about.

[0002]

2. Description of the Related Art As a conventional fan coupling device of this type, a type in which the drive torque of a drive disk is transmitted to a sealer housing by oil supplied to a torque transmission chamber, and the structure thereof is generally as follows. For example, the interior of the casing is divided into a torque transmission chamber and an oil sump chamber by a partition plate, and a drive disk is rotatably provided in the torque transmission chamber by driving a drive unit, and the oil in the oil sump chamber is supplied to the partition plate or the cover. There is known a temperature-responsive fluid-type fan coupling device having a structure in which oil is supplied from a formed supply hole to a torque transmission chamber and oil in the torque transmission chamber is returned to an oil sump chamber by a circulation path. No. 63-21048). According to this type of fan coupling device, the drive torque of the drive disk is transmitted to the sealing box by the oil supplied from the oil reservoir to the torque transmitting chamber, and the cooling fan attached to the sealing box rotates. For example, cooling of an automobile engine is performed. This type of fan coupling device also
The ambient temperature is detected by the bimetal, and when this temperature rises, the opening of the supply hole is increased, or the valve member is operated directly by a solenoid valve or indirectly by an electromagnet to increase the opening of the supply hole. Thus, the amount of oil in the torque transmission chamber is increased, the rotation speed of the casing is increased, and the cooling fan is rotated at a high speed to enhance the cooling effect.

[0003]

However, this type of fan coupling device has the following problems. That is, when restarting the engine in a state where a large amount of oil is present in the torque transmission chamber or during rapid acceleration during traveling, a large amount of oil is present in the torque transmission chamber following the acceleration of the drive disk on the drive side. As a result, the sealed casing (cooling fan) on the driven side also causes a rapid rise in rotation for a short time. This phenomenon is generally referred to as a "swirling" phenomenon, which causes fan noise and accompanying discomfort, absorbs engine output, and deteriorates fuel economy.

[0004] As means for solving such a "swinging" phenomenon, for example, oil flowing out of a supply hole of a partition plate is once led to the opposite side in the diameter direction, and then supplied to a torque transmission chamber. (See Japanese Patent Publication No. Sho 63-21048), a drive disk having a hollow structure and an auxiliary oil sump chamber provided, or a method of operating a large air volume fan at low speed is known.

However, these means have the following disadvantages. That is, the oil that flows out of the supply hole of the partition plate is once guided to the opposite side in the diameter direction and is supplied to the torque transmission chamber from there. When the engine is stopped while the oil is present, the oil does not flow into the torque transmission chamber from the oil sump chamber, so that the "swirling" phenomenon does not occur when the engine is restarted. However, there is no effect in preventing the phenomenon of "swinging" at the time of restart when the engine is stopped in a situation where a large amount of oil is present in the torque transmission chamber or at the time of rapid acceleration during traveling. In addition, the method of providing the auxiliary oil reservoir has the drawback that the structure is inevitably complicated, the cost is high, and the axial dimension is required extra, which imposes restrictions on mounting. Furthermore, the method of operating a large air volume fan at low speed requires a fan coupling device with high heat dissipation due to the increase in size of the cooling fan, which necessitates an increase in the size of the fan coupling device.
It is not preferable because there is an increase in driving horsepower (a decrease in fuel efficiency) and restrictions on mounting.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is possible to reduce the fan noise and improve the fuel efficiency by preventing the occurrence of the "swirling" phenomenon by extremely simple means. An object of the present invention is to provide a temperature-sensitive fluid-type fan coupling device that can be removed.

[0007]

SUMMARY OF THE INVENTION A temperature-sensitive fluid-type fan coupling device according to the present invention is supported via a bearing on a rotating shaft having a driving disk fixed to a tip end thereof, and is cooled at an outer peripheral portion. The interior of the sealer box consisting of the cover and the case with the fan attached thereto is partitioned into an oil sump chamber and a torque transmission chamber containing the drive disc by a partition plate. A dam and a circulating flow passage extending from the torque transmission chamber side to the oil sump chamber side connected to the dam are formed on a part of the inner peripheral wall surface on the sealer box side facing the outer peripheral wall portion, and provided outside the cover. A valve member that opens and closes a supply hole that is operated by the actuated actuator and that communicates from the oil sump chamber side to the torque transmission chamber side, and is provided on an opposing wall near the outside of the drive disk, the case, and the cover. In a fan coupling device configured to control the transmission of torque from the rotary shaft side to the driven casing side by increasing or decreasing the effective contact area of oil in the gap, both sides of the supply hole A pair of weirs are provided so as to be in close contact with both the oil sump indoor wall and the partition plate. Also, the weir may be formed integrally with the cover, and it is preferable that the weir is provided with a means for restricting excess oil flow.

Further, the inside of the casing is partitioned into a torque transmitting chamber and an oil sump chamber by a partition plate, and a drive disk is rotatably provided in the torque transmitting chamber by driving of a driving unit to separate oil in the oil sump chamber. In the case of a temperature-sensitive fluid-type fan / coupling device having a structure in which oil is supplied from a supply hole formed in a plate or a cover to a torque transmission chamber and oil in the torque transmission chamber is returned to an oil reservoir through a circulation path,・ In the initial period when the coupling device is in the ON state, the amount of oil supplied from the oil sump chamber to the torque transmission chamber exceeds the amount of oil collected from the torque transmission chamber by the dam, and the oil in the oil sump chamber with time increases. Is supplied to and discharged from the torque transmission chamber, leaving a minimum amount, and is balanced. All the oil recovered at this time is supplied to the torque transmission chamber side, and the amount of recovered oil is equal to the amount of supplied oil. However, the oil discharged from the oil sump chamber is discharged from the torque transmission gap of the torque transmission chamber. An amount larger than the capacity cannot enter the torque transmission gap, but stays in the gap before the torque transmission gap. At the time of startup or acceleration, the oil in the torque transmission gap is collected by the dam, but the oil that has accumulated in the gap sequentially flows into the torque transmission gap, causing a “swinging” phenomenon. On the other hand, the accumulated oil is
Excess oil is required because the amount exceeds the minimum required to operate the coupling device. However, it is necessary to ensure durability of the oil and to absorb manufacturing errors.

According to the present invention, the excess oil is kept in the oil sump chamber instead of the gap in front of the torque transmission gap in the torque transmission chamber. The purpose of this is to prevent the oil from flowing into the torque transmission gap from the part to prevent the phenomenon of "swinging" on the casing side of the sealer. As a means, a pair of holes are provided on both sides of the supply hole formed in the partition plate or cover. Is provided so as to be in close contact with both the oil sump indoor wall and the partition plate.

[0010] The pair of weirs in the present invention is substantially formed of a plate-like member, and is provided on both sides of the supply hole formed in the partition plate or the cover and in the radial direction so as to be positioned in the circumferential direction of the rotating shaft body. This weir adheres to both the oil sump indoor wall and the partition plate,
Formed as part of the oil sump chamber. Therefore, this weir serves to flow a required amount of oil near the supply hole and store the remaining oil in the oil sump chamber.

As the actuator of the valve member, a strip-shaped or spiral plate-shaped bimetal, a solenoid valve, or an electromagnet can be used. In the case of a strip-shaped bimetal, the base of the plate-shaped valve member is fixed to the partition plate, and the free end is provided so as to be separated from and connected to the periphery of the supply hole, and the strip-shaped bimetal and the valve member are linked by a connecting rod. Let
In the case of a spiral bimetal, the spiral bimetal and the valve member are operatively connected to each other by a connecting rod to fix the plate-like valve member to the partition plate, and the surface of the partition plate on the oil sump chamber side or the torque transmission chamber side. And so as to make rotational contact with the peripheral wall surface of the oil sump chamber. In the case of a solenoid valve, the base end of the plate-shaped valve member is fixed to the partition plate, and the free end is provided so as to be separated from and attached to the peripheral portion of the supply hole, and the free end of the piston rod of the solenoid valve is attached to the valve member. The solenoid valve is actuated based on a signal sensed by a temperature sensor, a throttle opening sensor, or the like when mounted, whereby the valve member is directly operated via the piston rod. Furthermore, in the case of an electromagnet, the base end of the plate-shaped valve member is fixed to the partition plate, and an electromagnet provided at a slight distance in the axial direction from the sealer housing and opposed to the valve member is provided with a temperature sensor or a throttle. The valve member is indirectly operated by exciting based on a signal detected by an opening degree sensor or the like and magnetically attracting the valve member.

In the present invention, as described above, it is necessary to ensure oil durability and absorb manufacturing errors by the action of the pair of weirs provided in the oil sump chamber. In this way, excess oil can be kept in the oil sump chamber instead of the gap in front of the torque transmission gap in the torque transmission chamber. it can.

Further, in the present invention, a cutout, an orifice, a wall extending in the circumferential direction, or a step is provided at the inner free end of the weir to serve as a means for restricting excess oil from flowing into the weir. The oil does not reach the supply hole without passing through the notch or the orifice, and therefore requires a considerable amount of time to pass through the cut hole or the orifice. Since the amount of oil is small, it is possible to more effectively prevent the "swirling" phenomenon.

Therefore, according to the present invention, not only at the time of restarting the engine but also at the time of rapid acceleration during operation, it is possible to prevent the phenomenon of "swirling" on the side of the seal box, thereby reducing and absorbing fan noise. The horsepower can be reduced and the fuel efficiency can be improved, and the torque can be optimally transmitted from the drive disk to the sealer housing in accordance with various drive conditions by the valve member that operates according to the outside air temperature. Also,
The oil generated by shearing by the drive disk in the torque transmission chamber stays in the oil sump chamber, which is easily cooled by the radiator passing wind due to the heat generated on the front side, and is further cooled to improve the durability of the oil.

[0015]

FIG. 1 is a longitudinal sectional side view showing an example of a temperature-responsive fan coupling device according to the present invention, and FIG.
Fig. 3 is a vertical sectional front view showing a portion of a weir provided in an oil reservoir of the fan coupling device; Fig. 3 is a modified example of a weir provided in an oil reservoir of the fan coupling device; FIG. 4B is a vertical sectional front view showing a weir integrated with a cover, and FIG. 4 is a vertical side view showing another example of a temperature-responsive fan coupling device according to the present invention. FIG. 5 is a vertical sectional front view showing a portion of a weir provided in an oil sump chamber of the fan coupling device, and FIG. 6 is a modification of a weir provided in an oil sump chamber of the fan coupling device.
(A) is a vertical cross-sectional front view showing a weir provided in a C-shape, (B)
7 is a vertical sectional front view showing a weir integrated with the cover, FIG. 7 is a vertical sectional front view showing a weir provided in the torque transmission chamber of the fan coupling device, and FIG. 8 is a temperature-sensitive fan according to the present invention.
FIG. 9 is a vertical sectional side view showing still another example of the coupling device, FIG. 9 is a vertical sectional side view showing still another example of the temperature-responsive fan coupling device according to the present invention, and FIG. (A) is an enlarged vertical cross-sectional view,
(B) is a cross-sectional view taken along line XX of (A), FIG. 11 is a view showing still another embodiment of the weir according to the present invention, (A) is an enlarged vertical cross-sectional view, and (B) is (A). 12) is a sectional view taken along line XI-XI, and FIG. 12 is a view showing still another embodiment of the weir according to the present invention.
(A) is an enlarged longitudinal sectional view, (B) is a sectional view taken along line XII-XII of (A), FIG. 13 is a view showing still another embodiment of the weir according to the present invention, and (A) is an enlarged longitudinal section. (B) (A)
14 is a sectional view taken along line XIII-XIII, FIG. 14 is a view showing still another embodiment of the weir according to the present invention, (A) is an enlarged longitudinal sectional view, and (B) is a sectional view taken along line XIV-XIV in (A). FIG. 1 is a sectional view, wherein 1 is a rotary shaft that forms a driving side, 2 is a sealer box, 3 is a torque transmission chamber, 3-1 is a torque transmission gap, 3-2 is a torque transmission gap, a front gap, 4 Is a partition plate, 5 is an oil sump chamber, 6 is a drive disk, 7-1 and 7-2 are valve members, 8-
1, 8-2 are connecting rods, 8-3 is a piston rod, 9-1 is a strip-shaped bimetal, 9-2 is a spiral bimetal, 9-3 is a solenoid valve, 9-4 is an electromagnet, 10-1, 10 -2 is a supply hole, 11 is a dam, 12 is a support fitting, 13 is a circulation passage, 14 is a circular through hole, 15 is a weir, 16 is a support fitting, 1
7 is a bracket, 18 is a magnetic body piece, and 19 is a bearing.

In the temperature-responsive fan coupling device shown in FIG. 1, a large-diameter and short-sized seal box 2 is rotatable on a rotating shaft 1 which is rotated by driving a drive unit (not shown) via a bearing. Mounted on This sealed box 2 is case 2
-1 and a cover 2-2. The inside is divided into a torque transmission chamber 3 and an oil sump chamber 5 by a partition plate 4, and is fixed to an end of the rotary shaft body 1 in the torque transmission chamber 3. Between the disc-shaped drive disk 6 and the inner peripheral surface of the torque transmission chamber 3 and the gap 3 in front of the torque transmission gap.
-2 is formed. Oil supply hole 10-1 from oil sump chamber 5 to torque transmission chamber 3 is formed in partition plate 4.
Is provided. A valve member 7-1 having a spring property for opening and closing the supply hole 10-1 has one end attached to the wall surface of the partition plate 4 on the oil sump chamber 5 side and the other end positioned at the supply hole 10-1 portion. And a supporting bracket 12 fixed to the front surface of the cover 2-2. It is provided inside via a rod 8-1. On the other hand, the dam 11 is provided on a part of the inner peripheral wall surface of the casing 2 facing the outer peripheral wall portion of the drive disk 6 in which the oil is collected during rotation, and transmits the torque transmitted before the dam 11 in the rotation direction. A circulation flow passage 13 is formed from the chamber 3 side to the oil sump chamber 5 and has a pumping function. Reference numeral 14 denotes a circular through hole provided at the center of the partition plate 4.

According to the present invention, in the fan coupling device having the above-described configuration, the supply hole 10- formed in the partition plate 4 is provided.
A pair of weirs 15 are provided on both sides of the rotary shaft 1 in the circumferential direction so that a pair of weirs 15 are provided in the radial direction so as to be in close contact with both the inner peripheral wall of the oil sump chamber 5 and the partition plate 4. It is formed integrally with the inner peripheral wall as a part of the oil sump chamber. This weir 1
5 is usually provided in the left and right direction as shown in FIG.
As shown in (A), it may be provided in a C-shape, or as shown in (B), may be provided integrally with the cover.

As described above, a pair of weirs 15 are provided on both sides of the supply hole 10-1 provided in the partition plate 4 in the radial direction so as to be in close contact with both the inner peripheral wall of the oil reservoir 5 and the partition plate 4. In this case, the weir allows the required amount of oil in the oil sump chamber 5 to flow near the supply hole 10-1 and acts to accumulate other oil in the oil sump chamber 5 to ensure oil durability. It is necessary to absorb errors in manufacturing and
As a countermeasure, excess oil can be kept in the oil sump chamber 5 instead of the gap 3-2 in front of the torque transmission gap 3-1 in the torque transmission chamber 3; 2
The side can be prevented from "swirling".

FIG. 4 shows a supply hole 10 to the torque transmission chamber 3 side provided on the peripheral side wall surface inside the cover 2-2 using a spiral bimetal 9-2 as a temperature sensing element as an actuator.
-2 is an example in which the present invention is applied to a fan coupling device configured to open and close by sliding displacement in the circumferential direction. In this case, deformation of the spiral bimetal 9-2 due to a temperature change is shown. The valve member 7-2 opens and closes the supply hole 10-2 provided on the peripheral side wall surface inside the cover 2-2 in conjunction with. In other words, when the outside air temperature is high due to the deformation of the spiral bimetal 9-2, the supply hole 10-2 is opened by the rotation of the valve member 7-2 through the connecting rod 8-2, and the oil reservoir chamber 5 is opened. Is supplied to the torque transmission chamber 3, and when the outside air temperature is low, the supply hole 10-2 is closed by rotating the valve member 7-2 in the opposite direction via the connecting rod 8-2, The mechanism is such that the supply of oil to the torque transmission chamber 3 is stopped.

In the case of the fan coupling device shown in FIG. 4, the fan coupling device is positioned on both sides of the supply hole 10-2 provided in the inner peripheral wall of the cover 2-2 and in the circumferential direction of the rotary shaft 1. A weir 15 similar to the above is provided in the radial direction, and is formed integrally with the inner peripheral wall of the oil sump chamber 5 so as to be in close contact with both the inner peripheral wall and the partition plate 4. This weir 15 may be provided in a C shape as shown in FIG. 6 (see FIG. 6A) or may be provided integrally with the cover (see FIG. 6B). When a pair of weirs 15 are provided on both sides of the supply hole 10-2 provided on the inner peripheral wall of the cover 2-2 in this manner, the weirs also supply the required amount of oil in the oil sump chamber 5 as described above. Only supply hole 10-2
It is necessary to ensure the durability of the oil and absorb manufacturing errors by allowing the oil to flow in the vicinity and store the remaining oil in the oil sump chamber 5. Excess oil can be kept in the oil sump chamber 5 instead of in the gap 3-2 in front of the torque transmission gap 3-1 in the torque transmission chamber 3; It is possible to prevent the phenomenon of "swirling".

In the fan coupling device using the spiral bimetal shown in FIGS. 4 to 6 described above, the valve member 7-
2, the supply hole 10-2 to the torque transmission chamber 3 side provided on the peripheral side wall surface inside the cover 2-2 is slidably displaced in the circumferential direction to open and close the supply hole 10-2. The member 7-2 is slidably displaced in the circumferential direction on the surface of the partition plate 4 on the oil reservoir side to open and close the supply hole 10-1 provided in the partition plate 4 (not shown), or FIG. As shown in FIG.
May be configured such that the surface of the partition plate 4 on the side of the torque transmission chamber 3 is slidably displaced in the circumferential direction to open and close the supply hole 10-2 provided in the partition plate 4. Since the valve member 7-2 does not come into contact with the pair of weirs 15 even when the valve member 7-2 is slid and displaced in the circumferential direction, the interval between the pair of weirs 15 is made as small as the diameter of the supply hole 10-1. be able to.

FIG. 8 shows a solenoid valve 9-3 supported by a support bracket 16 fixed to the front surface of the cover 2-2 as an actuator, and a supply hole for the torque transmission chamber 3 provided in the partition plate 4. 1 shows an example in which the present invention is applied to a fan coupling device configured to be opened and closed by the separation and contact of a plate-shaped valve member 7-1 as in the embodiment of FIG. The output signal of the temperature sensor or the throttle opening sensor is detected by detecting a temperature change of the outside environment by a temperature sensor (not shown) or a throttle opening sensor (not shown) for detecting the throttle opening. , The solenoid valve 9-3 is activated or deactivated, and the piston rod 8-3 is protruded or retracted. As the piston rod 8-3 protrudes and retracts, the valve member 7-1 attached to the free end of the piston rod 8-3 opens and closes the supply hole 10-1 provided in the partition plate 4.
That is, when the outside air temperature detected by the temperature sensor is high or when the change in the throttle opening per unit time detected by the throttle opening sensor is small, the solenoid valve 9-3 is turned off based on the output signal of the sensor. In the operating state, the piston rod 8-3 is retracted, and the valve member 7
-1, the supply hole 10-1 is opened, and the oil in the oil sump chamber 5 is supplied to the torque transmission chamber 3, while the outside air temperature sensed by the temperature sensor is low or the unit time sensed by the throttle opening degree sensor If the hit throttle opening is sharp, the solenoid valve 9-3 is actuated based on the output signal of the sensor to cause the piston rod 8-3 to protrude,
The valve member 7-1 approaches and the supply hole 10-1 is closed, so that the supply of oil to the torque transmission chamber 3 is stopped.

In the case of FIG. 8 as well, a pair of weirs 15 are located on both sides of the supply hole 10-1 provided in the partition plate 4 and in the circumferential direction of the rotary shaft 1, and a pair of weirs 15 are formed on the inner peripheral wall of the oil sump chamber 5. In the case where the dam 15 is provided in the radial direction so as to be in close contact with both the partition plate 4 and the partition plate 4, the weir 15 supplies the oil in the oil sump chamber 5 by a necessary amount to the supply hole 10.
It is necessary to ensure the durability of the oil and absorb manufacturing errors by allowing the oil to flow in the vicinity of -1 and store the remaining oil in the oil sump chamber 5. The excess oil is supplied to the torque transmission gap 3 in the torque transmission chamber 3.
Since it is possible to keep the oil in the oil reservoir chamber 5 instead of the space 3-2 just before, it is possible to prevent the phenomenon of "swirling" on the sealer box 2 side due to the excess oil.

FIG. 9 shows an electromagnet provided as an actuator on the front surface of the cover 2-2 at a slight distance in the axial direction, and fixed in a concentric ring shape to a bracket 17 mounted on a base such as a vehicle body. The magnetic plate 18 is attached to a position corresponding to the electromagnet 9-4 of the plate-shaped valve member 7-1 having the same spring property as that of the embodiment of FIG. Torque transmission chamber 3 provided in
This is an example in which the present invention is applied to a fan coupling device configured to open and close the supply hole 10-1 to the side by the separation and contact of the plate-shaped valve member 7-1. In this case, a temperature change of the outside environment is sensed by a temperature sensor (not shown), or a throttle opening sensor (not shown) for detecting a throttle opening is detected, and based on an output signal of the sensor. When the electromagnet 9-4 is excited or de-excited to suck or release the valve member 7-1, the valve member 7-1 is supplied to the supply hole 10 provided in the partition plate 4.
Open and close -1. That is, when the outside air temperature detected by the temperature sensor is high or when the change in the throttle opening per unit time detected by the throttle opening sensor is small, the electromagnet 9-4 is output based on the output signal of the sensor.
To magnetically attract the magnetic piece 18 of the valve member 7-1,
The valve member 7-1 resists the spring repulsion of the valve member 7-1 itself.
, The supply hole 10-1 is opened, and the oil in the oil sump chamber 5 is supplied to the torque transmission chamber 3. On the other hand, when the outside air temperature detected by the temperature sensor is low or when the throttle opening degree sensor detects per unit time, When the throttle opening is sharp, the electromagnet 9-4 is de-energized based on the output signal of the sensor to release the magnetic attraction of the valve member 7-1 with respect to the magnetic piece 18, and the valve member 7-1 is released. The valve member 7-1 approaches by the spring repulsive force of the above, the supply hole 10-1 is closed, and the supply of the oil to the torque transmission chamber 3 is stopped.

In the embodiment shown in FIG. 9, the center of the bracket 17 to which the ring-shaped electromagnet 9-4 is fixed is attached to the support shaft 2-2a projecting from the center of the outside of the cover 2-2. And both ends are fixed to a base such as a vehicle body, but the present invention is not limited to such an embodiment.

In the case of FIG. 9 as well, a pair of weirs 15 are located on both sides of the supply hole 10-1 provided in the partition plate 4 and in the circumferential direction of the rotary shaft 1, and a pair of weirs 15 are formed on the inner peripheral wall of the oil sump chamber 5. When the dam is provided in the radial direction so as to be in close contact with both the partition plate 4 and the partition plate 4, the weir supplies the oil in the oil sump chamber 5 by a necessary amount to the supply hole 10-1.
It is necessary to ensure the durability of the oil and absorb manufacturing errors by allowing the oil to flow in the vicinity and store the remaining oil in the oil sump chamber 5. Excess oil can be kept in the oil sump chamber 5 instead of in the gap 3-2 in front of the torque transmission gap 3-1 in the torque transmission chamber 3; It is possible to prevent the phenomenon of "swirling".

In each of the above embodiments, an example has been described in which the inner free end of the weir 15 is configured to be flush with the axial direction. However, the present invention is not limited to such an example, and is applicable when the engine is restarted, The inner free end of the weir 15 is formed into a shape as shown in FIGS. 10 to 12 at the time of rapid acceleration during operation, and the inflow of extra oil for allowing the oil overflowing the weir 15 to flow slowly and as slowly as possible. Preferably, it is a limiting means. That is, a substantially V-shaped or substantially U-shaped notch 15-1 as shown in FIG. 10 at the inner free end of the weir 15, a rectangular notch 15-2 at a substantially central portion as shown in FIG. 11, or as shown in FIG. The orifice 15-3 near the inner free end, FIG.
14 extending in the circumferential direction as shown in FIG.
The step 15-5 is provided as shown in FIG.

As described above, when the engine is restarted or the vehicle is suddenly accelerated during operation, the oil in the torque transmission gap 3-1 is discharged from the dam 11.
And flows into the oil sump chamber 5, and there is no oil in the gap 3-2 in front of the torque transmission gap 3-1. However, if the amount of oil flowing into the oil sump chamber 5 is sudden and large,
5, overflows into the supply hole 10-1, flows into the torque transmitting chamber 3, and then enters the torque transmitting gap 3-1 to transmit the torque to prevent the "swinging" phenomenon to the sealer box 2 side. May be shorter. In such a case, a notch 15-1 or 15-2 or a long hole orifice 15-3 is provided at the free inner end of the weir 15 as shown in FIGS. 10 to 12, or a pair of weirs 15 as shown in FIG. A wall 15-4 extending in the circumferential direction in the relative direction is provided at the inner end of the cover, or the cover 2 is provided between a pair of weirs 15 as shown in FIG.
A step 15-5 extending from the -2 side is provided. By adopting such a configuration, the oil collected in the oil sump chamber 5 does not reach the supply hole 10-1 unless it passes through the notch 15-1 or 15-2 or the long hole orifice 15-3.
Alternatively, the supply hole 10-1 cannot be reached unless the vehicle passes over the wall 15-4 or the step 15-5. Therefore, it takes a considerable amount of time to pass or climb over the supply hole 10-1, and the amount thereof is small. Since the inflow of the oil into 3-1 is delayed and the amount of the oil is small, it is possible to more effectively prevent the "swirling" phenomenon. The surface of the wall portion 15-4 shown in FIG. 13 and the surface of the step portion 15-5 in FIG. 14 are roughened or made uneven, and the step portion 15-5 in FIG. If the inclined surface is formed so as to become higher toward the transmission chamber 5 side, the arrival of the oil in the supply hole 10-1 is further delayed, so that it is possible to more effectively prevent the "swirling" phenomenon.

[0029]

As described above, the temperature-responsive fan coupling according to the present invention uses a pair of weirs provided in the oil sump chamber to ensure oil durability and absorb manufacturing errors. Although it is necessary to prevent excess oil, it is possible to keep the excess oil in the oil sump chamber instead of the gap in front of the torque transmission gap in the torque transmission chamber. It is possible to prevent the “cooling” phenomenon on the (cooling fan) side. Therefore, according to the present invention, not only at the time of restarting the engine but also at the time of rapid acceleration during operation, it is possible to prevent the phenomenon of "swirling" on the seal box side, to reduce the cooling fan noise and to reduce the fan absorption horsepower. In addition to reducing fuel consumption and improving fuel efficiency, a valve member that operates in response to changes in the outside air temperature allows torque to be optimally transmitted from the drive disk to the seal box in accordance with various drive conditions. It has an excellent effect. Further, the oil generated by the shearing by the drive disk in the torque transmission chamber stays in the oil sump chamber for a long time, so that the oil is further cooled and the durability of the oil is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an example of a temperature-responsive fan coupling device according to the present invention.

FIG. 2 is a vertical sectional front view showing a weir provided in an oil sump chamber of the fan coupling device;

FIG. 3 is a vertical sectional front view showing a weir provided in a C-shape, and FIG. 3B is a longitudinal sectional view showing a weir provided in an oil sump chamber of the fan coupling device; It is a longitudinal front view shown.

FIG. 4 is a vertical sectional side view showing another example of the temperature-responsive fan coupling device according to the present invention.

FIG. 5 is a longitudinal sectional front view showing a weir provided in an oil sump chamber of the fan coupling device;

6A and 6B are modified examples of a weir provided in the oil sump chamber of the fan coupling device, wherein FIG. 6A is a longitudinal front view showing a weir provided in a C shape, and FIG. It is a longitudinal front view shown.

FIG. 7 is a vertical sectional front view showing a weir provided in a torque transmission chamber of the fan coupling device.

FIG. 8 is a vertical sectional side view showing still another example of the temperature-responsive fan coupling device according to the present invention.

FIG. 9 is a vertical sectional side view showing still another example of the temperature-responsive fan coupling device according to the present invention.

FIG. 10 is a view showing another embodiment of the weir according to the present invention;
(A) is an enlarged vertical cross-sectional view, and (B) is a cross-sectional view taken along line XX of (A).

11A and 11B are diagrams showing still another embodiment of a weir according to the present invention, wherein FIG. 11A is an enlarged vertical sectional view, and FIG. 11B is a view XI-X of FIG.
It is sectional drawing on an I line.

12A and 12B are diagrams showing still another embodiment of the weir according to the present invention, wherein FIG. 12A is an enlarged longitudinal sectional view, and FIG. 12B is an XII-X of FIG.
FIG. 2 is a cross-sectional view taken along line II.

FIGS. 13A and 13B are diagrams showing still another embodiment of the weir according to the present invention, wherein FIG. 13A is an enlarged vertical sectional view, and FIG.
FIG. 3 is a cross-sectional view taken along line XIII.

14A and 14B are diagrams showing still another embodiment of a weir according to the present invention, wherein FIG. 14A is an enlarged vertical sectional view, and FIG.
It is sectional drawing on the XIV line.

[Description of Signs] 1 Rotary shaft body 2 Sealing box 2-1 Case 2-2 Cover 2-2a Support shaft 3 Torque transmission chamber 3-1 Torque transmission gap 3-2 Gap before torque transmission gap 4 Partition Plate 5 Oil reservoir 6 Drive disk 7-1, 7-2 Valve member 8-1, 8-2 Connecting rod 8-3 Piston rod 9-1 Strip-shaped bimetal 9-2 Spiral bimetal 9-3 Solenoid valve 9- Reference Signs List 4 Electromagnet 10-1, 10-2 Supply hole 11 Dam 12 Support bracket 13 Circulation flow passage 14 Circular through hole 15 Weir 15-1, 15-2 Notch 15-3 Slot orifice 15-4 Wall 15-5 Step Part 16 Support bracket 17 Bracket 18 Magnetic piece 19 Bearing

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[Procedure amendment]

[Submission date] June 10, 1999 (1999.6.1
0)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 13

Claims (3)

[Claims] 1. A sealer box, which is supported via a bearing on a rotating shaft body having a drive disk fixed to a tip end thereof and has a cooling fan mounted on an outer peripheral portion thereof, and the inside of a sealer box is partitioned by a partition plate. A dam is formed on a part of the inner peripheral wall on the side of the sealer box facing the outer peripheral wall of the drive disk for collecting oil during rotation, which is partitioned into an oil sump chamber and a torque transmission chamber containing the drive disk. Forming a circulating flow passage communicating from the torque transmission chamber side to the oil sump chamber side connected to the dam, and being directly or indirectly operated by an actuator provided outside the cover, from the oil sump chamber side to the torque transmission chamber side. A valve member that opens and closes a supply hole that communicates with the drive shaft, and increases or decreases the effective contact area of oil in a torque transmission gap provided on an opposing wall near the outside of the drive disk and the case and the cover. From the body side In a fan coupling device configured to control the transmission of torque to the driven casing side, a pair of weirs is provided on both sides of the supply hole so as to be in close contact with both the peripheral wall of the oil chamber and the partition plate. A temperature-responsive fluid-type fan coupling device, which is provided. 2. The temperature-sensitive fluid fan according to claim 1, wherein said weir is formed integrally with said cover.
Coupling device. 3. The temperature-responsive fluid-type fan coupling device according to claim 1, wherein the weir is provided with an excess oil inflow restricting means.