JP3221631B2 - Temperature sensitive fluid type fan coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature-sensitive fluid-type fan coupling device which generally controls the rotation of a fan for cooling an engine in an automobile and constantly supplies a cooling air flow according to a running state to the engine. The present invention relates to an improvement of Japanese Patent Application Laid-Open No. 1-135929 already proposed by the present applicant.

[0002]

2. Description of the Related Art Conventionally, as a fan coupling device according to the above proposal, a drive disk fixed to a rotating shaft body is provided with an idle oil reservoir with a hollow inside.
And a torque transmission having a hole diameter on the outer peripheral wall portion of the idle oil reservoir chamber, the supply amount being smaller than the discharge amount by a dam provided on the inner peripheral side wall surface where the oil is collected on the side of the seal box. By providing a small-diameter hole that communicates with the chamber, the presence of the small-diameter hole keeps the fan from turning around after the engine is started for a short time immediately after that. The purpose was achieved by reducing noise and promoting warm-up operation.

[0003]

Although the above-mentioned prior art naturally achieves its object to some extent, it tends to be insufficient, however, especially from the repeated operation at low rotation to high rotation. There was a tendency that the phenomenon of "spinning" at the time of abrupt transition to can not be kept in a short time immediately after that.

[0004] The present invention has been made in view of the above-described problems, and the "rotating around" on the fan side when the engine is stopped in a state where a large amount of oil is present in the torque transmission chamber in the above-described prior art is used after the engine is started. Not only to reduce the fan noise and to promote the warm-up operation in cold weather, but also to satisfy the original purpose, and to reduce the amount of oil inside the enclosure to a specified small amount. In particular, it is possible to extremely effectively suppress the "slipping" phenomenon of the fan even in the case of a sudden transition from the operating state at the time of low rotation to the high rotation, and the heat transfer effect at the radial wall. It is an object of the present invention to provide a temperature-responsive fluid-type fan / coupling device capable of improving the propagation of oil temperature to the outside and promoting heat radiation.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a case and a cover which are supported via a bearing on a rotating shaft having a drive disk fixed to the end thereof and a cooling fan is mounted on the outer periphery. The interior of the sealer box is divided into an oil sump chamber and a torque transmission chamber containing the drive disk by a partition plate having an oil supply adjusting hole, and a drive disk for collecting oil during rotation. A dam is formed at a part of the inner peripheral wall surface on the sealer box side facing the outer peripheral wall surface, and a discharge flow passage communicating with the dam and communicating from the torque transmission chamber side to the oil reservoir chamber side is formed. A valve member provided on the front surface of the cover to open the outflow adjustment hole of the partition plate when the ambient temperature exceeds a set value and to close the flow control hole when the ambient temperature exceeds the set value. Prepare the interior so that it is linked to deformation due to temperature changes in the body, Increase or decrease the effective contact area of oil in the torque transmission gap provided on the opposing wall near the outer side between the disk and the sealer box, and move from the drive side rotating shaft side to the driven side sealer box side. In the fan coupling device for controlling the transmission of rotational torque of the drive disk, the drive disk is formed to have a thickness that is opposed to the dam over the entire surface on the peripheral side thereof, and the central portion of the front side wall is provided. A plurality of storage chamber structures are formed, the interior of which is partitioned by radial radial walls extending to the vicinity of the perimeter of the through hole provided in the vicinity, and the drive disk rear wall portion, preferably in the rotational direction, The gist of the present invention is a temperature-responsive fluid-type fan / coupling device which is located near the base of the radial wall and slightly inward from the peripheral side surface and has a small-diameter hole formed in each of the storage chambers. And before The width thickness of the drive disk and constitutes forms at least 10.0 m / m or more.

[0006]

According to the present invention, there is provided a dam structure in which the thickness of the drive disk is made to be thick and opposed to the entire surface of the drive disk, and provided near the center of the front side wall. Through-hole structure, a plurality of storage chamber structures defined by radial walls extending to the vicinity of the through-hole, and positions of small-diameter holes formed slightly inward from the peripheral surface at the rear wall of the drive disk. Due to the structure, even when a large amount of oil is present in the torque transmission chamber, the oil on the torque transmission chamber side is supplied to the inside of a part of the storage chamber partitioned from the through hole near the center during the stop. And the amount of residual oil on the side of the torque transmission chamber becomes small. Then, when the engine is subsequently started in such a state, the small amount of oil contained in a part of the storage chambers is gradually supplied to the torque transmission chamber side by the small diameter hole. Of course, it is possible to keep the driving disk in a very short time immediately after the start of the engine, because of the dam effect on the entire surface of the drive disk due to the thick structure, and the effect of the storage chamber and the small-diameter hole formed inside the drive disk. Use of high viscosity fluid,
Alternatively, a sudden transition from an operating state near low rotation (1000 rpm) at an intermediate temperature (around 80 ° C.) to a high rotation at an intermediate temperature (around 80 ° C.) due to a lack of a dam function (lack of a relative rotation speed) caused in a low torque fan coupling device. The tendency of the prior art fan to "slip around" that occurs during operation at the time of the low-speed operation is determined by the inflow of a part of the oil into the storage chamber from the small-diameter hole to minimize the oil amount. The oil in the storage chamber is allowed to gradually flow out through the small-diameter hole toward the torque transmission chamber at the time of a continuous shift to high rotation. The fan rotation can be reliably obtained.

Although the oil in the torque transmission chamber is pressure-fed to the discharge passage by the dam, a part of the oil flows back through a small-diameter hole into many storage chambers where no oil exists, and further reduces the amount of oil in the torque transmission chamber. Let it.

Further, the heat transfer effect at the radial wall makes it possible to transfer the heat on the front side of the drive disk accompanying the rise of the oil temperature to the rotary shaft via the radial wall to promote the heat radiation effect.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a temperature-sensitive fluid-type fan coupling device according to the present invention, and FIG. FIG. 3 is a cross-sectional view showing a state where the drive disk alone is stopped, and FIG.
FIG. 4 is a longitudinal sectional view showing the entire fan coupling device in a stopped state corresponding to line III-III, FIG. 4 is a longitudinal sectional view showing a state of the drive disk of FIG. 1 at the time of starting rotation, and FIG. FIG. 6 is a longitudinal sectional view showing the entire fan coupling device at the time of starting rotation corresponding to the line, FIG. 6 is a state diagram at the time of constant rotation in the operating state of FIG. 1, and FIG. 7 is a drive disk alone corresponding to the line VII-VII of FIG. FIG. 8 is a longitudinal sectional view showing a state at the time of constant rotation of FIG. 8, FIG. 8 is a partially cutaway sectional view corresponding to the line VIII-VIII of FIG. FIG. 10 is a state diagram corresponding to FIG. 1 at the time of rapid high rotation in an operating state of another embodiment, FIG. 10 is a longitudinal sectional view showing a state of the drive disk alone at the time of rapid high rotation corresponding to line XX in FIG. 9, and FIG. Fig. 10 Storage room, small-diameter hole according to the main part of the present invention corresponding to line XI-XI 12 is a cross-sectional view of a part of a notch due to an enlargement near the dam and the dam. FIG. 12 is a noise curve diagram comparing the present invention with the prior art. A plurality of storage chambers (14) whose interior is partitioned by radial radial walls (15) extending to the vicinity of the perimeter of the through-hole (14 ") provided in the through-hole (14") are formed to have a large thickness (14. 5
m / m), and a drive side having a flange wall (1 ') for attaching to a mating base at a rear end portion, and is configured as a drive side. A sealed casing as a driven side is supported by a case (2) in which a cooling fan (not shown) is mounted on the outer peripheral portion via a bearing and a cover (3). (5) is a partition plate, which divides the inside of the casing into an oil sump chamber (6) and a torque transmission chamber (4) containing the drive disk (7). The partition plate is provided with an oil supply adjustment hole (5 ') from the oil sump chamber (6) to the torque transmission chamber (4). The drive disk (7) is located in the torque transmission chamber (4) and has a small gap for transmitting torque to the opposing wall surface of the casing. (8) is a valve member for opening and closing the supply adjusting hole (5 '). One end of the valve member is attached to the wall surface of the partition plate (5) on the oil sump chamber (6) side, and the other end is connected to the supply adjusting hole. And a temperature-sensitive body (10) made of a plate-like bimetal whose both ends are supported by a support bracket (11) fixed to the front surface of the cover (3). It is provided inside through a connecting rod (9) so as to be linked to the accompanying deformation. Reference numeral (12) denotes a dam, which is formed of a thick drive disk (7) on a part of the inner peripheral surface of the sealer box facing the outer peripheral surface of the drive disk (7) where oil is collected during rotation operation. It is opposed to the entire surface on the peripheral side of the width, and it moves from the side of the torque transmission chamber (4) provided near the dam in the rotation direction to the side of the oil sump chamber (6). A pumping function is provided by the discharge flow path (13).

(14 ') is a front, rear or center portion of the radial wall (15) near the base of the radial wall (15) defined in the rotational direction on the rear wall of the drive disk (7) opposed to the oil reservoir (6). And the torque transmission chamber is located slightly inward from the peripheral side surface thereof.
This is a small-diameter hole penetrated in (4).

Next, the operation of the fan coupling device of the present invention will be described.

First, when the engine is stopped with a large amount of oil in the torque transmission chamber (4) or with the supply adjusting hole (5 ') opened, the torque transmission chamber (4) Oil will flow only through the through holes (14 ") into the lower chambers (14) defined by the radial walls (15) (the lower two chambers in FIGS. 2 and 3). Flows into only the two storage chambers (14), (14) and does not flow into the horizontal and upper storage chambers), resulting in a reduction in oil remaining in the torque transmission chamber (4).

When the engine is started in this state, as shown in FIG. 4 and FIG.
The drive disk (7) rotates in an empty state where no oil exists in the other storage chambers (14),... On the other hand, oil flows out of the small-diameter holes (14 ') and (14') into the torque transmitting chamber (4) due to centrifugal force caused by the rotation of the drive disk (7). The outflow is carried out only from the two small holes (14 ') and (14') of the two storage chambers (14) and (14) into which the oil flows, and the other storage chambers (14), ...
It is extremely small because it does not flow out of

The oil pressurized by the dam (12) is sent to the discharge passage (13) by pressure, and a part of the oil is supplied to many storage chambers (14) where no oil exists. '), Flows in through the ..., and further reduces the oil in the torque transmission chamber (4).

In other words, in the case of a single hollow storage chamber which is not partitioned by the radial wall (15), the oil in the storage chamber is entirely drained by the centrifugal force acting on the drive disk (7) when the engine is started. Although it is pressed so as to stick to the inner peripheral surface, it flows out of all small-diameter holes into the torque transmission chamber, but in the present invention, it flows out of a limited number of small-diameter holes, and a part of it flows back into the storage chamber, so This means that the amount of oil flowing into the transmission chamber is extremely small.

Therefore, the phenomenon of "spinning" immediately after the start of the engine is controlled in a very short time because oil in the torque transmission chamber (4) is pumped by the dam (12).

Next, the operation at the time of constant rotation when the supply adjusting hole (5 ') is opened is as shown in FIGS.
4) The oil that has accumulated in the oil reservoir (6) flows out of the small-diameter hole (14 ') to the torque transmission chamber (4) by centrifugal force due to the rotation of the drive disk (7), and the oil in the oil reservoir (6) is supplied and adjusted. The rotation torque of the drive disk (7), which is supplied to the torque transmission chamber (4) through the hole (5 '), is transmitted through oil to the sealed casing on the driven side.
On the other hand, oil in the torque transmission chamber (4) is pumped by the dam (12) and discharged to the oil sump chamber (6) via the discharge flow passage (13).

Further, during rapid acceleration during normal driving,
The drive disk (7) rotates rapidly at a high speed and the torque transmission chamber
(4) The oil inside is pressurized by the dam (12) and part of it is dam (12)
Pumping of the oil reservoir (6) through the discharge passage (13)
Although a part is discharged, a small diameter hole (1
4 ') Since it temporarily flows into the storage chamber (14), the oil in the torque transmission chamber (4) is reduced as a result, and the "slip around" phenomenon at the time of rapid acceleration can be prevented. In an atmosphere of 80 ° C,
FIG. 12 shows a noise curve when abruptly accelerated from 000 rpm to 5000 rpm in 10 seconds.
(A) shows the present invention, and (B) shows the prior art.

The width of the drive disk 7 is preferably not less than 10.0 m / m. If the width is less than 10.0 m / m, the fan coupling device for general use has a high height from the low rotation state. In the case of a sudden transition to rotation, it is not possible to effectively prevent the "rounding" phenomenon. or,
The present invention is not limited to the embodiment in which one through-hole (14 ") is provided at the center of the front wall portion, and may be constituted by arranging a plurality of concentric holes as shown in FIGS. Good.

[0020]

As described above, the temperature-sensitive fluid-type fan coupling device according to the present invention has a drive disk (7) having a large width and a large thickness, and the drive disk (7) is installed over the entire peripheral surface. And a radial wall (15) extending from the vicinity of the center of the front side wall of the drive disk (7). Multiple storage rooms (14)
The small-diameter hole (14 ') structure penetrated and located at each of the outer portions of the engine makes it possible to supply oil on the side of the torque transmission chamber (4) during the stop when the engine is stopped in a high-temperature operation state. Through Hole (14 ")
It flows into the interior of the storage room (14), and when the engine is subsequently started, the "circling around" on the fan side is kept short,
Abnormal fan noise can be reduced and warm-up operation in cold weather can be further promoted.During rapid acceleration during normal driving, the dam (12) enters the storage chamber (14) through the small-diameter hole (14 '). )) To allow a part of the oil pressurized to flow in and maintain the operating state with the minimum amount of oil. Therefore, even when the operating state at a low rotation speed suddenly changes to a high rotation speed, The "circling" phenomenon can be suppressed very effectively, and the heat transfer effect on the radial wall (15) further reduces the heat on the front side of the drive disk due to the rise in oil temperature via the radial wall (15).
This is a very useful temperature-sensitive fluid-type fan-coupling device that can be used to enhance the heat dissipation effect by transmitting to (1).

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a temperature-responsive fluid-type fan coupling device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state where the drive disk corresponding to the line II-II in FIG. 1 is stopped.

FIG. 3 is a longitudinal sectional view showing the entire fan coupling device in a stop state corresponding to the line III-III in FIG. 2;

FIG. 4 is a longitudinal sectional view showing a state of the drive disk shown in FIG. 1 at the time of starting rotation.

FIG. 5 is a longitudinal sectional view showing the entire fan coupling device at the time of starting rotation corresponding to the line VV in FIG. 4;

FIG. 6 is a state diagram at the time of constant rotation in the operating state of FIG. 1;

FIG. 7 is a longitudinal sectional view showing a state at the time of constant rotation of the drive disk alone corresponding to line VII-VII.

FIG. 8 is a partially cutaway sectional view corresponding to the line VIII-VIII in FIG. 7 and showing a storage room, a small-diameter hole, and an enlargement near a dam according to a main part of the present invention.

FIG. 9 is a state diagram at the time of rapid high rotation in an operating state of another embodiment.

10 is a longitudinal sectional view showing a state at the time of rapid high rotation of the drive disk alone corresponding to line XX in FIG. 9;

FIG. 11 is a partially cutaway sectional view corresponding to the line XI-XI of FIG. 10, which is an enlarged view of the storage room, the small diameter hole, and the vicinity of the dam according to the main part of the present invention.

FIG. 12 is a comparative noise curve diagram of the present invention and a conventional technology.

[Explanation of symbols]

 7 Drive Disk 12 Dam 14 Storage Room 14 'Small Diameter Hole 14 "Through Hole 15 Radial Wall

Claims (3)

(57) [Claims] An oil supply adjustment is performed by adjusting the inside of a sealer box, which is supported by a bearing on a rotating shaft body having a driving disk fixed to the end thereof and has a cooling fan mounted on an outer peripheral portion thereof. A partition plate having a hole is partitioned into an oil sump chamber and a torque transmission chamber containing the drive disk, and an inner peripheral wall surface on the sealer box side facing the outer peripheral wall surface of the drive disk for collecting oil during rotation. A dam and a discharge flow passage communicating with the dam from the torque transmission chamber side to the oil sump chamber side are formed in one part, and one end thereof is fixed to the oil sump chamber side, and the other end is connected to the outer periphery. When the temperature exceeds the set value, the supply adjustment hole of the partition plate is opened, and when the temperature is less than the set value, the valve member that closes is internally provided so as to interlock with the deformation caused by the temperature change of the temperature sensing element provided on the front surface of the cover. An opposing wall near the outside formed by the drive disk and the enclosure A fan cup that controls the transmission of rotational torque from the drive-side rotary shaft side to the driven-side sealer housing side by increasing or decreasing the effective contact area of oil in the torque transmission gap provided on the surface. In the ring device, the drive disk (7) has a thickness which is set to be opposed to the dam (12) over the entire peripheral surface thereof, and which is provided near a central portion of the front side wall thereof. ") A plurality of storage compartments, the interior of which is delimited by radial radial walls (15) extending around the hole
(14) In addition to the structure, a small-diameter hole (14 ') is provided through each of the storage chambers (14) so as to be located slightly inward from the peripheral side surface of the disk rear wall portion. Characteristic temperature-sensitive fluid-type fan coupling device. 2. The small-diameter hole (1) according to claim 1,
4 ') is a temperature-sensitive type fluid fan characterized by being provided near the base of the radial wall (15) in the direction of rotation.
Coupling device. 3. The temperature-responsive fluid-type fan coupling device according to claim 1, wherein the drive disk has a width of at least 10.0 m / m or more. .