KR20010061205A - A fan-clutch structure for vehicles - Google Patents

Abstract

PURPOSE: A fan clutch structure of a vehicle is provided to prevent degradation by using oil and to operate a fan clutch accurately by frictionally operating the fan clutch through using water. CONSTITUTION: A fan clutch for a vehicle is composed of: a water suction hole(36) formed in a water pump shaft(22) and penetrated from a water pump chamber(18) of a water pump installed in a cylinder block to a frictional chamber(34) between a driving shaft frictional plate and a driven shaft frictional plate; a water recovery hole(42) penetrated from the frictional chamber to a water recovery chamber(38) and formed in a driven shaft(30); a water drain hole(40) penetrated from the water recovery chamber to the water pump chamber and formed in the water pump shaft; and an opening control unit of the water suction hole regulating the opening of the water suction hole according to ambient temperature. The fan clutch structure prevents aging by the degradation of oil by driving the fan clutch frictionally through using water.

Description

Vehicle fan clutch structure {A FAN-CLUTCH STRUCTURE FOR VEHICLES}

The present invention relates to a vehicle fan clutch, and more particularly, to a vehicle fan clutch structure that can ensure a more accurate operation of the fan clutch by enabling friction driving of the fan clutch using water having a stable molecular structure. .

For example, a cooling fan is provided behind the radiator of the vehicle to force the radiator to cool it and to prevent overheating of the exhaust manifold at high speed.

The fan clutch is a device that automatically adjusts the rotation of the cooling fan to reduce the loss of power consumed to drive the fan as much as possible, and to reduce engine overcooling and fan noise. Fluid coupling, friction clutch, electrical and the like.

In the above, the friction clutch type, as shown in Figure 2, the water pump shaft 116 which is connected to the crank shaft in the cylinder block 112 is driven to the water pump 114 installed to one side of the cylinder block 112 and A driven shaft 118 coupled with the water pump shaft 116 is provided, and a friction plate 126 of the driven shaft 124 on which the friction plate 120 of the driven shaft 118 and the fan 122 are mounted is oiled. By contacting and rotating by the viscosity of the silicone oil (S) stored in the storage chamber 128, the power of the engine is transmitted to the fan clutch device is made of a principle that is operated. Here, the silicone oil S stored in the oil storage chamber 128 flows between the friction plate 120 of the driven shaft and the friction plate 126 of the driven shaft along the oil supply hole 130 to fluidly couple the two friction plates. The oil is returned to the oil storage chamber 128 along the recovery hole 132. When the temperature of the fan clutch device increases due to the change in the ambient temperature of the engine, the rotational force of the driven shaft 118 and the friction plate 120 increases gradually. While the amount of silicone oil (S) flowing between the friction plate by the centrifugal force is gradually increased, the rotation speed of the fan clutch and the cooling fan is adjusted accordingly.

However, when the engine power is transmitted to the fan clutch using the viscous friction coefficient of the silicone oil as described above, deterioration of the silicone oil is inevitably occurred when the engine is frequently driven in the medium and high speed regions of the vehicle. There was a problem in that the situation that the operation of the fan clutch can not come eventually due to the viscosity decrease of the silicone oil due to such oil degradation.

The malfunction of the fan clutch as described above adversely affects the entire cooling system of the vehicle and may also cause overheating of the engine.

Therefore, the present invention is to solve the above problems, an object of the present invention is to prevent the deterioration caused by the use of oil by the structure that can frictionally operate the fan clutch using water to ensure more accurate operation of the fan clutch To provide a vehicle fan clutch structure that can be.

1 is a schematic cross-sectional view of a fan clutch structure according to the present invention;

2 is a schematic cross-sectional view of a fan clutch structure according to the prior art.

<Description of the symbols for the main parts of the drawings>

12 cylinder block 14 water pump housing

16: water pump body 18: water pump room

20 impeller 22 water pump shaft

24: water pump pulley 26: driven shaft

28: friction plate 30: driven shaft

32: friction plate 34: friction chamber

36: water suction hole 38: water recovery chamber

40: water discharge hole 42: water recovery hole

44 housing 46 needle valve

48: Bi-Metal 50: Spring

52: cooling fan

The present invention for achieving the above object,

In a vehicle fan clutch driven by a driven shaft coupled to a water pump shaft connected to a crankshaft in a cylinder block and a driven shaft equipped with a cooling fan rotated in contact with each other by a friction medium,

A water suction hole penetrating into a friction chamber formed between the friction plate of the driven shaft and the friction plate of the driven shaft from the water pump chamber of the water pump mounted on one side of the cylinder block and formed in the water pump shaft; A water recovery hole penetrating from the friction chamber to one side of the water recovery chamber formed on the opposite side of the friction plate of the driven shaft of the friction chamber to be formed in the driven shaft; A water discharge hole penetrating from one side of the water recovery chamber into the water pump chamber and formed in the water pump shaft; It provides a vehicle fan clutch structure comprising a water suction hole opening amount adjusting means for adjusting the opening amount of the water suction hole according to the ambient temperature of the engine.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention that can specifically realize the above object will be described.

1, a preferred embodiment of a vehicular fan clutch structure according to the present invention is shown.

First, referring to the structure of the water pump for the operation of the friction clutch fan clutch, the water pump housing 14 and the water pump body 16 mounted on one side of the cylinder block 12 is installed, the water pump housing ( 14) and the water pump body 16 includes a water pump chamber 18 filled with water and an impeller 20 rotating in the water pump chamber 18, and the center of the impeller 20 is a water pump. The shaft 22 has a structure which can be rotated by the pulley 24 of the water pump which cooperates with the crankshaft pulley of the cylinder block 12. As shown in FIG.

The water pump shaft 22 is coupled to the driven shaft 26 of the fan clutch to rotate the driven shaft 26, the driven shaft 26 of the friction plate 28 and the fan clutch formed on one side thereof The fan clutch is formed in a structure in which power can be transmitted from the driven shaft 26 to the driven shaft 30 by contacting the friction plate 32 formed on the driven shaft 30 with the friction medium.

In the fan clutch as described above, the present invention is characterized in that the friction medium is made of water in the water pump.

To this end, a structure capable of circulating water of the water pump into the fan clutch is required, and the present invention is directed from the water pump chamber 18 of the water pump mounted on one side of the cylinder block 12 in the water pump shaft 22. The water suction hole 36 penetrated by the friction chamber 34 formed between the friction plate 28 of the coaxial 26 and the friction plate 32 of the driven shaft 30, the friction chamber 34 and the friction chamber A water discharge hole 40 penetrating one side of the water recovery chamber 38 formed on the opposite side of the friction plate 32 of the driven shaft and the water pump chamber 18 is formed, and the water recovery chamber 38 is formed in the driven shaft 30. The water recovery hole 42 penetrating one side of the water), and the water in the water pump circulates back from the water suction hole 36 through the water discharge hole 40 to the water pump through the water discharge hole 40. Provide structure.

At this time, the water suction hole opening amount adjusting means is mounted to the water suction hole in order to adjust the amount of water flowing along the circulation structure made as described above according to the temperature around the engine.

More specifically, the water suction hole opening amount adjusting means is provided in the housing 44 which is mounted on the outside of the driven shaft 30, and is provided in the housing 44, and penetrates the driven shaft 30 to pass the water suction hole. A needle valve 46 inserted into the 36, a bi-metal 48 for variably supporting the needle valve 46 from the outer surface of the driven shaft 30 according to the ambient temperature, and the housing 44. And a spring 50 for elastically supporting the needle valve 46 from the support direction of the bimetal 48.

The end of the needle valve 46 is inserted into the water suction hole 36 and the needle valve insertion surface of the water suction hole 36 are tapered, respectively, so that the amount of water passing through the water suction hole 36 It can be adjusted according to the forward and backward amounts of the valve 46.

The bimetal 48 is a material that is stretched according to the ambient temperature of the engine. When the temperature is high, the bimetal 48 increases the amount of water by retracting the needle valve 46 from the water intake hole 36. When the backward action force of the needle valve 46 of the bimetal 48 disappears, the amount of water is reduced by advancing the needle valve 46 again by a constant elastic force.

Reference numeral 52 designates a cooling fan.

Looking at the operation of the vehicle fan clutch structure made as described above are as follows.

First, when the ambient temperature is increased due to the high engine speed, the bimetal 48 overcomes the elastic force of the spring 50 as the ambient temperature increases, and reversely operates the needle valve 46 to open the water intake hole 36. The water in the water pump chamber 18 is opened by the negative pressure formed in the friction chamber 34 by the increase in the discharge pressure in the water pump chamber 18 by the water pump operation and the rotation of the fan clutch device. 22 is sucked into the water suction hole 36, and the water in the water pump chamber 18 flows into the friction chamber 34 along the water suction hole 36 and the friction plate 32 of the driven shaft 30. The rotational power of the driven shaft 26 is transmitted to the driven shaft 30 through the fluid friction coefficient of water while flowing between the friction plates 28 of the driven shaft 26, and the water exits between the friction plates 28 and 32. Is introduced into the water recovery chamber 38 along the water recovery hole 42 of the driven shaft 30. The water is discharged through the hole 40 of the water pump shaft 22 is brought back into the water pump.

Here, once only the circulation structure of the water is arranged once again, the water in the water pump is separated from the water pump chamber 18 → water suction hole 36 → friction chamber 34 → water recovery hole 42 → water recovery chamber 38 → water discharge hole (40) It consists of the flow structure of the water pump chamber 18. In this way, the cooling fan 52 mounted on the fan clutch rotates rapidly by the flow of water circulated, thereby preventing overheating of the engine.

On the other hand, when the engine speed decreases and the engine ambient temperature decreases, the needle valve 46 moves forward by the elastic force of the spring 50, thereby reducing the amount of water through the water intake hole 36. Accordingly, the driven shaft ( The rotational power transmitted from 26 to the driven shaft 30 is reduced, so that the rotational speeds of the fan clutch and the fan are reduced and the supercooling of the engine is prevented.

According to the vehicular fan clutch structure of the present invention made as described above, since the fan clutch is frictionally driven using water having a stable molecular structure, there is no problem of aging due to use such as deterioration of oil, and accordingly, Operation can be guaranteed.

In addition, water can be used to prevent environmental pollution and to reduce costs.

Claims (3)

In a vehicle fan clutch driven by a driven shaft coupled to a water pump shaft connected to a crankshaft in a cylinder block and a driven shaft equipped with a cooling fan rotated in contact with each other by a friction medium, Water penetrated from the water pump chamber 18 of the water pump mounted on one side of the cylinder block to the friction chamber 34 formed between the friction plate of the driven shaft and the friction plate of the driven shaft, and formed in the water pump shaft 22. A suction hole 36; A water recovery hole 42 penetrating from the friction chamber 34 to one side of the water recovery chamber 38 formed on the opposite side of the friction plate of the driven shaft of the friction chamber to be formed in the driven shaft 30; A water discharge hole (40) penetrating into the water pump chamber (18) from one side of the water recovery chamber (38) and formed in the water pump shaft (22); And a water suction hole opening amount adjusting means for adjusting the opening amount of the water suction hole 36 according to the ambient temperature of the engine. The method according to claim 1, The water suction hole opening amount adjusting means A housing 44 mounted outside the driven shaft; A needle valve (46) installed in the housing and inserted into the water suction hole through the driven shaft; A bimetal (Bi-metal) 48 which variably supports the needle valve according to an ambient temperature from an outer surface of the driven shaft; And a spring (50) elastically supporting the needle valve from the housing in a direction opposite to that of the bimetal. The method according to claim 2, And an end portion inserted into the water suction hole of the needle valve and a needle valve insertion surface of the water suction hole are respectively tapered.