KR20020044613A - Fan clutch using the wax - Google Patents

Abstract

PURPOSE: A fan clutch by a wax is provided to improve productivity by simplifying structure of the fan clutch and to reduce loss of power by engaging a rotor with a cover. CONSTITUTION: A fan clutch by using a wax comprises a rotor(1) rotating by being connected to an engine; a cover(2) rotating while receiving rotational force from the rotor; plural fans(3) combined to an outer circumference of the cover; a space unit(4) formed on a combining portion between the rotor and the cover; a wax(5) expanding or contacting according to temperature by being formed in the space unit; plates(7,8) contacted to both sides of the wax; a first frictional unit(9) mounted on the cover; a second frictional unit(10) transferring the rotational force of the rotor into the cover; and a spring(11) absorbing excess extension force of the wax. Thereby, the fan clutch by using the wax reduces loss of power by connecting the rotor to the cover.

Description

Fan clutch using the wax}

The present invention relates to a fan clutch using a wax, in particular, to form a fan clutch in a simple configuration to significantly improve the productivity of the product, and because the use of wax as the expansion and contraction member does not require a separate sealing structure, the rotor When and the cover is connected, the power is transmitted to 100%, so it relates to a fan clutch using a wax to reduce the power loss.

Figure 3 shows a conventional fan clutch,

The main shaft 33 of the fan shaft 31 on which the plurality of fans 32 are mounted is coupled to the crankshaft 41, and the main shaft 33 is clutched to be in contact with the fan shaft 31. have.

The reservoir tank 37 for filling a certain amount of oil is formed in the clutch 34, and the oil is in communication with the reservoir tank 37 in the fan shaft 31 so that the oil is supplied through the oil supply line 39. An oil gallery 38 for circulating is formed, and an oil supply line 39 is formed to smooth the inside of the fan shaft 31 from the oil gallery 38, and the oil supply line 39 and the reservoir tank 37 are formed. An oil return line 40 is connected.

Then, the bimetal 35 that contracts or expands according to the temperature generated by the radiator is formed to be exposed to one side of the fan shaft 31, and the reservoir tank 37 and the oil gallery 38 are formed at the end of the bimetal 35. Opening and closing plate 36 for adjusting the amount of opening of the connection passage between the configuration is formed.

The main function of the fan clutch is to allow the rotational speed of the fan 32 to vary according to the temperature generated by the radiator so as to effectively cool the cooling water passing through the radiator.

Referring to the operation of the fan clutch, the bimetal 35 is contracted or expanded in accordance with the temperature change of the radiator to operate the opening and closing plate 36, the opening and closing plate 36 is the reservoir tank 37 and the oil gallery 38 Adjust the amount of opening of the connecting passage.

Accordingly, when the engine is driven and the crankshaft 41 rotates, the main shaft 33 connected thereto rotates so that the clutch 34 held on the main shaft 33 interlocks and rotates. The rotation speed of the fan shaft 31, that is, the fan 32, is adjusted according to the amount of oil circulating from the gallery 38 to the oil supply line 39 and the oil return line 40.

In other words, when the amount of oil passing through the oil supply line 39 is large, the clutch 34 and the fan shaft 31 are almost connected in series so that the clutch 34 and the fan shaft 31 rotate at the same speed. When the amount of oil passing through the oil supply line 39 is small, the coupling force between the clutch 34 and the fan shaft 31 is reduced, so that the rotation speed of the fan shaft 31 becomes smaller than the rotation speed of the clutch 34. Will be.

However, in the related art, as the oil is used as a power transmission medium, the structure of the product is very complicated to form a sealing structure, productivity is reduced, and when the oil leaks due to breakage of parts, the fan does not operate at all. In addition, there was a problem that can not expect 100% power transmission efficiency because the oil is used as a medium as a medium.

Accordingly, the present invention for solving the above problems is to include a wax shrinking or expanding in accordance with the temperature change between the rotor and the cover to transfer the rotational force of the rotor to the cover when the wax expands according to the temperature change inside the engine room. As the fan rotates, the fan clutch can be formed in a simple configuration, which greatly improves the productivity of the product, and since wax is used as the expansion and contraction member, a separate sealing structure is not required. It is intended to provide a fan clutch using a wax that can be 100% delivered to reduce the power loss.

The present invention for achieving the above object,

A rotor connected to the engine side and constantly rotating;

A cover which is opposed to the rotor and rotates when rotational force is supplied from the rotor;

A plurality of fans coupled to the outer circumferential surface of the cover;

A space portion having a predetermined size formed at a coupling portion of the rotor and the cover;

A wax formed in the space part and contracting or expanding according to a change in ambient temperature;

Plates opposed to both sides of the wax;

A first friction portion formed on the cover side;

It is formed on one side of the plate is characterized in that it consists of a second friction portion to transfer the rotational force of the rotor to the cover while facing the first friction portion when the wax is expanded.

In addition, the wax is wrapped around the rubber of the rubber material, characterized in that the spring is formed between the plate and the rotor for absorbing the overexpansion of the wax.

1 is a cross-sectional view showing a fan clutch using the wax of the present invention.

2 is a cross-sectional view showing an operating state of the present invention.

3 is a view showing a conventional fan clutch.

※ Explanation of code for main part of drawing

1: rotor, 2: cover,

3: fan, 4: space,

5: wax, 6: rubber,

7,8: plate, 9: first friction portion,

10: second friction part, 11: spring,

12: bearing,

Hereinafter, with reference to the accompanying drawings Figures 1 and 2 will be described a preferred embodiment of the present invention.

Reference numeral 1 denotes a rotor that is connected to the engine side and rotates at all times. On one side of the rotor 1, a cover 2 for coupling a plurality of fans 3 is formed.

The cover 2 is selectively rotated by the rotational force supplied from the rotor 1.

Between the cover 2 and the rotor 1, a space portion 4 having a predetermined size is formed, and inside the space portion 4, a wax 5 is contracted or expanded by heat generated from a radiator. .

The wax 5 is installed in a state surrounded by a rubber 6 of rubber material, and metal plates 7 and 8 are formed in front and rear of the wax 5, respectively.

Each of the plates 7, 8 is formed so as to be able to move back and forth in the space 4.

In addition, first and second friction parts 9 and 10 are formed at one side of the cover 2 and the plate 7, respectively.

The first and second friction parts 9 and 10 have a first friction part as the second friction part 10 formed in the plate 7 moves forward when the temperature rises and the wax 5 expands. 9), the rotational force of the rotor 1 is transmitted to the cover 2.

On the other hand, a spring 11 is formed inside the space 4 to absorb excessive expansion of the wax 5, which spring 11 is disposed between the plate 8 and the rotor 1. The spring 11 is contracted when the wax 5 is excessively expanded so that the first and second friction portions 9 and 10 try to face each other with too strong a force so that the overexpansion force of the wax 5 is increased. Will be absorbed.

The bearing 12 is mounted between the shaft of the rotor 1 and the cover 2.

Referring to the operation of the present invention configured as described above is as follows.

When the engine is driven, the rotor 1 also rotates at a constant speed.

In the initial stage of engine driving, since the heat radiated from the radiator is not so high, the wax 5 remains in a contracted state, in which case the first friction part 9 and the second friction part 10 do not contact each other, so that the rotor 1 Is not transmitted to the cover 2.

On the other hand, when the temperature of the cooling water gradually rises after a certain time, the heat radiated from the radiator gradually increases, whereby the wax 5 gradually expands.

When the wax 5 expands, the plate 7 is advanced by the expansion force of the wax 5, whereby the first friction portion 9 and the second friction portion 10 contact each other as shown in FIG. The rotational force of the rotor 1 is transmitted to the cover 2 so that the fan 3 rotates.

On the other hand, when the temperature of the radiator gradually rises to a very high temperature, the wax 5 continues despite the fact that the first friction portion 9 and the second friction portion 10 are opposed to each other and there is no space for further advancement. In this case, as the spring 11 contracts, the overexpansion force of the wax 5 is prevented from being transferred to the friction parts 9 and 10.

As described above, the present invention incorporates a wax that contracts or expands according to a temperature change between the rotor and the cover so that the fan rotates when the wax is expanded according to the temperature change inside the engine room. As it rotates, the fan clutch is formed as a simple configuration, which greatly improves the productivity of the product, and since wax is used as the expansion and contraction member, a separate sealing structure is not required. When the rotor and the cover are connected, the power is 100%. As a result, the effect of providing a fan clutch using wax can be expected to reduce power loss.

Claims (3)

A rotor 1 connected to the engine side and constantly rotating; A cover (2) which is opposed to the rotor (1) and rotates when a rotational force is supplied from the rotor (1); A plurality of fans 3 coupled to the outer circumferential surface of the cover 2; A space portion 4 having a predetermined size formed at a coupling portion of the rotor 1 and the cover 2; A wax (5) formed in the space (4) and contracting or expanding in accordance with a change in ambient temperature; Plates (7,8) opposed to both sides of the wax (5); A first friction portion 9 formed on the cover side 2; It is formed on one side of the plate (7) consists of a second friction portion (10) for facing the first friction portion (9) during the expansion of the wax (5) to transfer the rotational force of the rotor (1) to the cover (2) Fan clutch using a wax, characterized in that. The method of claim 1, The wax (5) is a fan clutch using a wax, characterized in that the rubber (6) is wrapped around the outside of the rubber material. The method of claim 1, Fan clutch using wax, characterized in that the spring (11) is formed between the plate (8) and the rotor (1) for absorbing the overexpansion of the wax (5).