JPH088349Y2 - Temperature Sensitive Fluid Fan Coupling Device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is designed to automatically control the cooling air flow rate by sensing the temperature change of the outside of the fan rotation for engine cooling in an automobile according to the running state. The present invention relates to an improvement in a temperature-sensitive fluid type fan / coupling device for supplying to an engine.

(Prior Art) Conventionally, a fan / coupling device of this type has a torque transmission chamber from an oil sump chamber (26) side provided on a partition plate (25) as shown in FIG. 6 and FIG. The outflow adjusting hole (25 ') flowing to the (24) side is a straight hole, and when the external temperature exceeds the set value, it is interlocked with the deformation due to the temperature change of the temperature sensitive body made of bimetal provided on the front of the seal box. Then, the valve member (28) made of a leaf spring closes the outflow adjusting hole (25 ') by fixing the front surface of the valve member (28) opposite to the outflow adjusting hole portion by tacking or the like. It had been.

(Problems to be solved by the invention) However, in such a conventional technique, the valve member (28) made of a leaf spring and the connecting rod (39) provided for interlocking with the deformation of the temperature sensitive body made of bimetal are Due to the abutting relationship, it must be formed to be wide to some extent, and the flat and wide rear surface on the valve member (28) side directly abuts the surface of the outflow adjusting hole (25 ') at right angles to the urging direction. Due to the mutual engagement structure of the planes, not only often the mutual abutting engagement state becomes defective, but also between the fully open position and the fully closed position, the torque transfer chamber (2) is moved from the oil sump chamber (26) side.
The valve member (28) sprays on the outflow adjusting hole (25 ') by the oil pressurized by the centrifugal force flowing to the 4) side, and when this spraying occurs, the outflow adjusting hole (25') is closed and the torque is reduced. The oil on the side of the transmission chamber (24) is reduced, the transmission torque is reduced, the rotation is reduced, and then the pressure due to the centrifugal force is reduced to open the valve member. ) Will vibrate finely, and this is considered to be one cause of so-called "hunting". Therefore, further improvement in stability of characteristics is desired.

The present invention has been made in view of the improvement in relation to the prior art, and prevents so-called "hunting" from occurring in the valve member composed of a leaf spring as described above, thereby preventing a so-called "hunting". It is an object of the present invention to provide a temperature-sensitive fluid type fan / coupling device capable of further efficiently and stabilizing the temperature and improving the characteristics as a product.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a cover and a case which are supported via a bearing on a rotary shaft body having a drive disk fixed to the tip and a cooling fan mounted on the outer periphery. The inside of the sealer box consisting of is divided into an oil reservoir chamber and a torque transmission chamber containing the drive disc by a partition plate having an oil outflow adjusting hole, and the drive disc for collecting the oil during rotation is separated. A dam is formed on a part of the inner wall surface on the side of the sealer facing the outer wall surface, and a circulation outflow path is formed from the dam to connect to the oil transfer chamber side from the torque transmission chamber side. A valve member consisting of a leaf spring that opens one end of the partition plate on the other side and opens the outflow adjusting hole of the partition plate when the temperature of the outside ambient exceeds the set value, and closes it at the set value or less. ,
A torque transmission chamber provided on the inner wall of the cover, which is provided inside so as to be interlocked with the deformation of the temperature sensitive body made of bimetal provided on the front surface of the cover due to the temperature change, and which faces the case and the cover forming the drive disk. In the fan coupling device, the effective contact area of the oil in the gap is increased or decreased to control the torque transmission from the rotary shaft side of the drive side to the sealed box side of the driven side. And a temperature sensitive fluid fan / coupling device provided with a protrusion having a flat bottom surface having a size larger than the hole peripheral edge of the outflow adjusting hole on the side of the valve member facing the section.
Further, the protrusion is formed by pressing the valve member,
A separate plug body is fixed to a valve member, the plug body is composed of a seal member, and a seal member is attached to the bottom surface of the protrusion. is there.

(Operation) Since the present invention has such a structure, the mutual shape of the outflow adjusting hole and the protrusion having a size larger than this hole and the mounting direction of the protruding portion facing the outflow adjusting hole are different. Due to the structure, it is possible to almost completely prevent the valve member made of a leaf spring from being blown into the outflow adjusting hole in the closing stroke and the opening stroke, and thereby to prevent the sudden opening and closing of the valve member. Therefore, fine vibration of the valve member can be prevented, and as a result, so-called "hunting" can be prevented, and the closing function can be made stable and the flow rate control function can be made more efficient and reliable. As a result, the characteristics will be further improved.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a partially cutaway longitudinal sectional view of a temperature-sensitive fluid type fan / coupling device of the present invention, and FIG. 2 is a part of an enlarged view near an outflow adjusting hole according to a main part of the present invention of FIG. Is a cutaway side view, FIG. 3 is a front view of FIG. 2, and FIGS. 4 and 5 are views corresponding to FIG.
Reference numeral (1) is a rotary shaft that constitutes the drive side, and a drive disk (7) is fixed to the tip of the rotary shaft, and a cover (a not shown) is attached to the outer periphery of the rotary disk via bearings on the shaft. 3)
Support the sealed box which consists of the case and the case (2). (5)
Is a partition plate, which is formed by partitioning the inside of the sealer box into an oil reservoir chamber (6) and a torque transmission chamber (4) containing the drive disk (7). An oil outflow adjustment hole (5 ') from the sump chamber (6) to the torque transmission chamber (4) is provided. The drive disk (7) is located inside the torque transmission chamber (4) and has a minute gap between the drive disk (7) and the opposing wall surface of the seal box including the partition plate (5) near the outside thereof for torque transmission. is there. (8) is a valve member consisting of a leaf spring that opens and closes the outflow adjusting hole (5 '), is located on the oil sump chamber (6) side and fixed by tacking at one end, and the other end is the outflow adjusting hole. It is located near the department. And the cover (3)
Through a connecting rod (9) so as to interlock with the deformation due to the temperature change of the outside surroundings by a temperature sensitive body (10) made of a plate-shaped bimetal supporting both ends of a supporting metal fitting (11) fixed to the front surface of the Prepared inside. Reference numeral (12) is a dam, which is provided on a part of the inner peripheral wall surface of the seal box facing the outer peripheral wall portion of the drive disk (7) where oil is collected during rotation, and at the same time, in the rotating direction. A pumping function is provided by forming a circulation flow passage (13) from the torque transmission chamber (4) side to the oil sump chamber (6) side in a continuous manner with an inlet provided near the dam. Reference numeral (14) is a protrusion, which has a flat bottom surface on the end side of the valve member (8), which is preferably slightly larger than the peripheral edge of the outflow adjusting hole (5 '). It is provided on the side facing the hole (5 '), and in order to avoid the influence of the oil pressurized by centrifugal force on the valve member, it should be as small as possible and the projection length should be as large as possible. preferable.

The protrusion (14) can be formed by pressing the valve member (8) as shown in FIGS.
As shown in the figure, a separate plug can be fixed to the valve member (8) by tacking or the like. Further, in order to further improve the sealing effect, a sealing member (15) can be provided on the bottom surface of the protrusion (14) as shown in FIG. 5, and the entire plug body shown in FIG. The present invention may also be configured as a temperature sensitive fluid type fan coupling having a labyrinth mechanism in which the outer peripheral portion of the drive disk (7) and the opposing wall surface of the enclosure are radially engaged with each other. It can also be applied to devices.

(Effect of the Invention) As described above, in the temperature-sensitive fluid type fan / coupling device according to the present invention, the outflow adjusting hole (5 ') and the protrusion (14) provided on the side opposite to the outflow adjusting hole. ), The influence of the oil pressurized by the centrifugal force acting on the valve member (8) consisting of a leaf spring in relation to the position of the fixed portion fixed on the partition plate (5) is minimized. To stabilize the operation of the valve member during its closing and opening strokes, prevent so-called "hunting", and perform the flow rate control function more efficiently and stably, further improving its characteristics as a product. It is an extremely useful temperature-sensitive fluid type fan / coupling device that can perform

[Brief description of drawings]

1 is a partially cutaway longitudinal sectional view of a temperature-sensitive fluid type fan / coupling device according to an embodiment of the present invention, and FIG. 2 is a vicinity of an outflow adjusting hole according to an essential part of the present invention of FIG. FIG. 3 is a front view of FIG.
FIG. 5 and FIG. 5 respectively show another embodiment, which is equivalent to FIG. 2, and FIG. 6 is a side view of a part of a notch by enlarging the vicinity of the outflow adjusting hole showing a conventional example, and FIG. 7 is FIG. FIG. (5 ') ... outflow adjusting hole, (6) ... oil sump chamber, (14)
…… Projection, (15) …… Seal member.

Claims (5)

[Scope of utility model registration request] Claim: What is claimed is: 1. An oil outflow adjusting hole is provided in an inside of a seal box which is supported by a bearing on a rotary shaft having a drive disk fixedly attached to its tip and which has a cover and a cooling fan mounted on the outer periphery. A partition plate having a partition wall that divides the oil storage chamber and the torque transmission chamber that houses the drive disk into one, and one of the inner peripheral wall surfaces of the sealer case side facing the outer peripheral wall surface of the drive disk that collects oil during rotation. A dam and a circulation outflow path from the torque transmission chamber side to the oil sump chamber side are formed at the end of the dam, and one end of the dam is fixed on the partition plate and the other end side is located at the oil sump chamber side. At the outside ambient temperature exceeds a set value, a valve member made of a leaf spring that opens the outflow adjusting hole of the partition plate and closes it at a set value or less is provided for the temperature sensing element made of bimetal provided on the front surface of the cover. Internally linked to deformation accompanying temperature change The effective contact area of oil in the gap of the torque transmission chamber provided on the opposing wall surface near the outside of the case and the cover forming the drive disk is increased or decreased to increase the seal from the drive shaft side to the driven side. In the fan coupling device configured to control the torque transmission to the box side, the hole periphery of the outflow adjusting hole (5 ') is provided on the valve member (8) side facing the outflow adjusting hole (5'). A temperature-sensitive fluid type fan / coupling device comprising a protrusion (14) having a flat bottom surface having a size larger than that of an edge portion. 2. The temperature-sensitive fluid type fan / coupling device according to claim 1, wherein the protrusion (14) is formed by pressing a valve member (8). 3. The temperature-sensitive fluid type fan / coupling device according to claim 1, wherein the protrusion (14) is constructed by fixing a separate plug to the valve member (8). 4. The temperature-sensitive fluid type fan / coupling device according to claim 3, wherein the plug body is constituted by a seal member (15). 5. A seal member (1) is provided on the bottom surface of the protrusion (14).
5. The temperature-sensitive fluid type fan / coupling device according to claim 1, wherein the temperature-sensitive fluid type fan / coupling device is constructed by attaching 5).