JP3221632B2 - 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.
In addition, the oil supply chamber communicates with the peripheral wall of the oil reservoir with a hole diameter that is smaller than the discharge amount of the dam provided on the inner peripheral wall of the casing housing side where oil is collected. By providing a small diameter hole, the presence of the small diameter hole keeps the fan from turning around after starting the engine in a short time immediately after that, preventing a sudden rise in rotation and reducing abnormal fan noise. And promoted warm-up driving to achieve its purpose.

[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.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the "slipping" on the fan side when the engine is stopped in a high-temperature operating state in the above-described prior art is limited to a short time after the start of the engine. Not only to reduce the noise and promote the warm-up operation in cold weather to be more effective to satisfy the original purpose, but also to shift the operation state from the low-speed operation state to the high-speed operation, the fan “ A temperature-responsive fluid-type fan / cup that can effectively suppress the "circling" phenomenon, and can promote the heat radiation by improving the oil temperature to the outside by the heat transfer effect at the projection wall. It is an object to provide a ring device.

[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 the rotational torque of the drive disk, the drive disk has a thickness that is in contact with the dam over the entire peripheral surface, and the inside of the drive disk is formed by the drive disk. A storage chamber structure having a relatively short radial projection wall protruding radially from the inner peripheral surface is provided, and a rear wall portion of the drive disk is located near the base of the projection wall in the rotation direction. The present invention is directed to a temperature-responsive fluid-type fan / coupling device having a small-diameter hole located slightly inward from the peripheral side surface and a through-hole formed near the center of the entire side wall. .

[0006]

According to the present invention, the drive disk is provided with a dam structure in which the thickness of the drive disk is made to be thick and the entire peripheral surface of the drive disk is in contact with the entire surface of the drive disk, and provided near the center of the front side wall. A large amount of oil is supplied to the torque transmission chamber by the through-hole structure, the storage chamber structure having a projecting wall therein, and the position structure of the small-diameter hole formed slightly inward from the peripheral surface on the rear wall of the drive disk. Even when the oil is present, the oil in the torque transmission chamber side immediately flows into the interior of the storage chamber through the through hole near the central portion during the stop of the engine, so that the oil in the torque transmission chamber side In a small amount. Then, when the engine is subsequently started in such a state, the oil in the storage chamber is evenly distributed over substantially the entire inner peripheral surface of the drive disk by centrifugal force, and the oil in the storage chamber is gradually transmitted from the small diameter hole. In order to supply to the chamber side, not only the "slipping around" of the fan side is kept shortly after the engine is started, but also the rotation of the drive disk is smooth, and the width of the drive disk due to its thickness is large. Dam effect on the entire surface,
Due to the effects of the storage chamber and the small-diameter hole formed inside the drive disk, the intermediate temperature due to the use of high-viscosity fluid or the lack of a dam function (insufficient relative rotation speed) that occurs in a low-torque fan coupling device. The tendency of the prior art fan "spinning" phenomenon occurring at the time of a sudden transition from an operating state near low rotation (about 1000 rpm) to high rotation at around 80 ° C.) is partially corrected by the fact that a part of the small diameter hole into the storage chamber is removed. Due to the inflow of oil, the operating state is maintained with the minimum amount of oil, so that it can be effectively suppressed, and at the time of constant rotation, the oil torque transmission chamber accompanying the sending effect by the projection wall (15). (4) The effect of supply can be promoted.

Further, it is possible to promote the heat radiation effect by transmitting the heat on the front surface of the drive disk accompanying the rise of the oil temperature to the rotating shaft through the projection wall by the heat transfer effect at the projection wall.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a temperature-responsive fluid-type fan / coupling device according to the present invention, and FIG. FIG. 3 is a sectional view showing a state in which the drive disk alone is stopped, FIG. 3 is a state diagram at the time of constant rotation in the operating state of FIG. 1, and FIG.
FIG. 5 is a cross-sectional view showing a state where the drive disk alone is rotated at a constant speed corresponding to the IV line, and FIG. FIG. 6 is a state diagram at the time of rapid high rotation in the operating state of FIG. 1, FIG. 7 is a sectional view corresponding to the line VII-VII of FIG.
FIG. 8 is a sectional view of a part of the storage room, a small-diameter hole, and an enlarged view of the vicinity of a dam according to the main part of the present invention, corresponding to the line of FIG. 7 VIII-VIII, and FIG. (1) is a rotating shaft body, and a storage chamber (14) having a relatively short radial projection wall (15) at its tip protruding inward in the radial direction from the inner peripheral surface. A drive disk (7) having a thickness (14.5 m / m) is fixed to the drive disk (7), and has a mounting flange wall (1 ') to a mating base at a rear end portion to serve as a drive side. A sealed casing as a driven side comprising a case (2) having a cooling fan (not shown) mounted on an outer peripheral portion of the shaft via a bearing on the shaft body and a cover (3). It is something that is supported. (5) is a partition plate, and the inside of the casing is sealed with an oil sump (6) and the drive disk.
(7) and a torque transmitting chamber (4) in which the oil transmitting chamber (6) is mounted.
An oil supply adjusting hole (5 ') for (4) is provided. 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 adjustment hole (5 '),
One end of the partition plate (5) on the side of the oil sump chamber (6) is attached by riveting, and the other end is located in the supply adjusting hole, and is fixed to the front surface of the cover (3). A connecting rod (9) linked to deformation due to a temperature change of the external surrounding due to a temperature-sensitive body (10) made of a plate-shaped bimetal whose both ends are supported by a metal fitting (11).
It is provided inside through. Reference numeral (12) denotes a dam, which is formed 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 the rotation operation due to the thickness of the drive disk (7). It is formed so as to be in contact with the entire peripheral side of a large thickness, and is discharged 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). Channel (1
3) has a pumping function. (14 ') is located on the front wall near the base of the protruding wall (15) in the rotation direction on the rear wall of the drive disk (7) facing the oil sump chamber (6) and is slightly inward from the peripheral side surface. Located in the direction of the torque transmission chamber (4)
Is a small-diameter hole penetrating through. (14 ") is the drive disk
It is a through hole formed in the center of the front side wall of (7).

The projection wall (15) is provided for smoothly transmitting oil from the small-diameter hole (14 ') to the side of the torque transmission chamber (4). The oil flowing into the chamber (14) is immediately discharged to make the amount of oil circulating in the torque transmission chamber (4) and the oil sump chamber (6) constant, thereby stabilizing the performance of the fan.

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

First, when the engine is stopped in a state where a large amount of oil exists in the torque transmission chamber (4), or when the supply adjusting hole (5 ') is opened, the oil in the torque transmission chamber (4) is stopped. Are mainly through holes (1
4 ") into the storage chamber (14), resulting in a reduction in the amount of oil remaining in the torque transmission chamber (4). When the engine is started in this state, it acts on the drive disk (7). Due to the centrifugal force, the oil in the storage chamber (14) gradually
4 ') Since the fluid flows out to the torque transmission chamber (14), "circling around" can be minimized.

Next, the operation at the time of constant rotation when the supply adjusting hole (5 ') is opened is as shown in FIGS.
The oil remaining in the fluid flows out of the small-diameter hole (14 ') to the torque transmission chamber (4) sequentially due to the centrifugal force caused by the rotation of the drive disk (7) and the sending effect of the projection wall (15), and the oil remains. Reservoir (6)
The oil inside is supplied to the torque transmission chamber (4) via the supply adjusting hole (5 ') and transmits the rotational torque of the drive disk (7) to the driven casing via the oil. 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) through the discharge flow passage (13).

Further, during rapid acceleration during normal running, 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 partly discharged to the oil sump chamber (6) through the discharge flow passage (13) by pumping of the dam (12). Since the oil flows into the storage chamber (14) from the small-diameter hole (14 '), the oil in the torque transmission chamber (4) is reduced as a result, and the "slip" phenomenon during rapid acceleration can be prevented. FIG. 9 shows a noise curve when this is suddenly accelerated from 1000 rpm to 5000 rpm in 10 seconds in an atmosphere of 80 ° C., as shown in FIG. 9, where (A) shows the present invention and (B) shows the prior art. .

In the above embodiment, one through hole (14 ") is provided at the center of the front wall portion.
It is also possible to arrange a plurality of concentric arrangements around the center of rotation.

[0015]

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 diameter in contact with the drive disk (7). Dam (12) structure, a through hole (14 ") provided near the center of the front side wall of the drive disk (7), and the small diameter hole ( 14 '), the torque transmission chamber during the engine stop
A large amount of oil present in (4) is returned to the interior of the storage chamber (14) through the through hole (14 "), and when the engine is subsequently started, the protrusion wall (1)
Due to the delivery effect of 5), the oil present inside the storage chamber (14) gradually flows out of the small-diameter hole (14 "), so that the" circle around "on the fan side is kept short, reducing abnormal fan noise and cooling. During a sudden transition from the low-rotation operation state to the high-rotation operation state, the warm-up operation can be promoted, and the torque transmission chamber (4) can be connected to the storage chamber (14) through the small-diameter hole (14 '). Part of the oil flows into the) to maintain the operation state with the minimum amount of oil, and at the time of constant rotation, the effect of supplying oil to the torque transmission chamber (4) due to the sending effect by the projection wall (15). Therefore, it is possible to effectively suppress the “slippage” phenomenon of the fan even in a sudden transition from the operating state at the low rotation to the high rotation, and furthermore, the transmission at the projection wall (15). Drive disk (7) due to oil temperature rise due to thermal effect Heat on the front side is rotated via projection wall (15) This is a very useful temperature-responsive fluid-type fan-coupling device that promotes the heat-dissipating effect by transmitting it to

[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 state diagram at the time of constant rotation in the operating state of FIG. 1;

FIG. 4 is a longitudinal sectional view showing a state at the time of constant rotation of a single drive disk taken along line IV-IV in FIG. 3;

FIG. 5 is a partially cutaway sectional view corresponding to the line VV in FIG. 4 of the storage room, the small-diameter hole, and the vicinity of the dam according to the main part of the present invention.

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

FIG. 7 is a longitudinal sectional view showing a state at the time of rapid high rotation of the drive disk alone corresponding to the line VII-VII in FIG. 6;

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 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 Projection Wall

Claims (1)

(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 width of the drive disk (7) is adjusted to a dam over the entire peripheral surface.
(14) a storage chamber (14) having a relatively small radial projection wall (15), which has a thickness that is in contact with (12), and whose inside protrudes radially from the inner peripheral surface of the drive disk; In addition to the above structure, a small-diameter hole (14) is provided on the rear wall of the drive disk (7) at the front portion near the base of the projection wall (15) in the rotation direction and slightly inward from the peripheral side surface. ') And a through-hole (14 ") near the center of the front side wall.