KR200226949Y1 - a oil cooler - Google Patents

Abstract

The present invention is formed by forming a space between the outer pipe and the inner pipe and forming both ends in a closed type, inserting an inner pin into the inside of the space, and mounting a boss and a tube at both ends of the outer pipe. Regarding the oil cooling system of the automatic transmission, the boss is formed of stainless steel (aka: stainless still) to improve corrosion resistance and the inner pipe and inner pin are formed of pure copper (C1220) to improve thermal conductivity. By forming the external pipes, booths and tubes which are actively in contact with the outside air from stainless steel with good thermal conductivity and corrosion resistance, the cooling efficiency and corrosion resistance can be improved, and brazing welding is performed when the external pipes and bosses are combined. Large quantities can be welded at the same time, reducing manufacturing costs while improving productivity. It is.

Description

Oil cooler for automatic transmission {a oil cooler}

The present invention relates to an oil cooling device installed in an oil supply device for supplying oil to an automatic transmission of an automatic transmission vehicle.

In more detail, it is formed by forming a space between the outer pipe and the inner pipe and forming both ends in a closed type, inserting an inner pin into the inside of the space, and mounting a boss and a tube at both ends of the outer pipe. In this case, the external pipe and the boss are formed of stainless steel (aka: SUS, stainless still) to improve corrosion resistance, and the inner pipe and inner pin are formed of pure copper (C1220) to improve the thermal conductivity of the oil of the automatic transmission. It relates to a cooling device.

In general, the automatic transmission is selectively operated by supplying hydraulic pressure to a friction element such as a clutch or a brake member that fixes the rotating element of the planetary gear set, thereby converting any rotating element in the transmission composed of several gears to the output shaft of the transmission. It is connected to the case and fixed to the case of the transmission, the shift is automatically made according to the driving state of the vehicle (for example, the vehicle speed and the open state of the throttle valve).

The oil used in the automatic transmission as described above transmits power in the torque converter of the automatic transmission, lubricates rotating elements such as gears and bearings, and is used as hydraulic oil for various hydraulic mechanisms, that is, valves, clutches, and brakes. It cools each sliding part of the automatic transmission, and is stored in the oil pan connected to the lower side of the transmission case and is supplied to various valve mechanisms and hydraulic operation elements through the oil pump.

The oil acting as described above is very important to maintain the temperature below a certain temperature because it engages the clutch and lubricates and cools each part.

In particular, the temperature of the oil has a great influence on the oil level. When the temperature of the oil increases, the oil level becomes high, and when the oil level increases, the oil amount becomes excessive and an overflow phenomenon occurs. It did not work well.

However, the conventional oil cooling apparatus of the automatic transmission has a problem in forming only a single material without considering the above temperature characteristics at all.

A conventional oil cooling apparatus will be described with reference to the accompanying drawings. In the conventional oil cooling device, the inner pipe 3 is inserted into the outer pipe 2 so that a space 4 is formed therebetween, and both ends thereof are sealed, and an inner pin 5 is disposed in the space 4. ) Is inserted (loaded), and the tube 7 and the boss 6 are mounted in communication with the space 4 so that oil can flow to both ends of the outer pipe 2.

By the way, the conventional oil cooler was formed of brass (Cu) or aluminum (Al), ignoring the characteristics of each configuration in forming the oil cooler.

Brass (Cu) is an oil cooler manufactured by using the outer pipe (2), inner pipe (3) and inner pin (5) mainly brass of C2600 (0.6t), boss (6) and tube (7) ) Is brass of C3602. However, since the brass of C2600 is a mixture of copper (Cu) and zinc (Zn) at a ratio of 70: 30%, thermal conductivity is low and cooling efficiency is low, and there is a problem of easily corroding, and appearance pipe (2 ) And boss (6) are welded by torch or argon welding, so it is cumbersome to process acid with foreign matter and manual welding is required. There was a problem falling.

In addition, an oil cooler manufactured using aluminum (Al) was manufactured by using the outer pipe (2), the inner pipe (3) and the inner pin (5) mainly as aluminum (1.0t) of A3003. The tube 7 used aluminum of A6061. The oil cooler manufactured by using aluminum as described above has a problem of being easily corroded due to low thermal conductivity and low cooling efficiency of the oil as well as low corrosion resistance. All BRAZING WELDING) can be used to improve productivity, but after welding, it was not easy to identify the appearance, so there was a problem that defective products were generated when the welding ring was omitted.

The present invention is to provide an improved oil cooler to solve the above problems.

The present invention inserts an inner pipe inside the outer pipe and seals both ends to form a space therebetween, inserts an inner pin into the space (loads), and distributes an oil to both ends of the outer pipe. In which the boss is mounted in communication with the space,

The purpose of the present invention is to provide an oil cooler by forming the outer pipe and the boss by using stainless steel, and the inner tube and the inner pin made of pure copper of C1220 series in brass.

Another object of the present invention is to provide an improved oil cooler capable of improving the cooling efficiency by increasing the thermal conductivity and preventing corrosion by enhancing the corrosion resistance.

It is to provide an improved oil cooler to improve productivity by performing brazing welding, and to easily identify the welding state after the welding is performed to prevent the entry of defective products.

The above object of the present invention,

The inner pipe 3 is inserted into the outer pipe 2, and both ends thereof are sealed to form a space 4 therebetween, and an inner pin 5 is inserted into the space 4, and the outer pipe ( In both ends of 2), the tube 6 is mounted in communication with the space 4 so that oil can flow therethrough, and the tube 7 is coupled to any one of the tubes 6,

Achieved by an oil cooler (1) characterized in that the outer pipe (2) and the boss (7) are formed of stainless, and the inner pipe (3) and the inner pin (5) are molded from brass in pure copper of C1220 series. do.

1 is a cross-sectional view showing an oil cooler for an automatic transmission according to the present invention.

2a and 2b is a longitudinal sectional view of the oil cooler for an automatic transmission according to the present invention.

Brief description of symbols for the main parts of the drawings

1. Oil cooler 2. External pipe 3. Internal pipe

4. Space part 5. Inner pin 6. Boss

7. Tube

The above objects and features of the present invention will be more clearly understood by the following detailed description based on the accompanying drawings.

1 to 2b shows a specific embodiment of the oil cooling pipe 1 according to the present invention, in which FIG. 1 is a sectional view and FIGS. 2a and 2b are longitudinal cross-sectional views.

The cylindrical outer pipe (2) was formed by using a stainless steel (SUS430) having a thickness of 0.5 tons according to the present invention, and the inside thereof was made of brass (Cu) and a copper plate (C1220) having a thickness of 0.5 tons, and the diameter was somewhat. A small inner tube pipe 3 was inserted to form a space 4 between the outer pipe 2 and the inner tube pipe 3. Inside the space portion 4 is inserted into the inner pin (5) formed of brass (C1220) having a thickness of 0.2t and sealing the opposing surfaces of both ends of the outer pipe (2) and inner tube pipe (3) It was combined in one piece to be.

In the combined state as described above, the boss 6 was fixed to communicate with the space 4 by punching holes at both ends of the outer surface of the outer pipe 2.

The boss 6 is formed of the same material as that of the external pipe 2, that is, stainless (SUS430), so that the boss 6 can be easily welded with the external pipe 2.

In particular, in fixing the boss 6 to the exterior pipe 2, welding is performed easily by carrying out a normal brazing welding process in which many welding materials are put in a furnace to perform welding at the same time. To make it work.

In addition, the tube 7 coupled to the boss 6 on one side of the boss 6 is also bonded to the molded of stainless steel (SUS430) of the same material as the boss 6, or molded of brass (C1220) To be combined.

Thus, in manufacturing the oil cooler 1, by molding the material differently according to each function and characteristics, it is possible to improve the thermal conductivity, corrosion resistance and productivity.

The outer pipe 2, the boss 6, and the tube 7 are molded from stainless steel (SUS430) with better thermal conductivity than brass (C2600) and aluminum (A3003), thereby opening up the oil from the oil passing through the space (4). Received the heat more easily to be able to actively conduct heat exchange with the outside air, and thus will be able to improve the cooling efficiency.

In addition, the outer pipe (2), the boss (6) and the tube (7) in contact with the outside air are formed of stainless steel (SUS430), which is superior to brass (C2600) and aluminum (A3003), to prevent corrosion and to prevent corrosion. It will be possible to improve.

In addition, when welding the boss 6 to the outer pipe 2, all brazing welding is carried out to simultaneously weld while a large amount is loaded in the furnace, thereby reducing manufacturing costs while improving productivity. After brazing welding, the welding state between the external pipe 2 and the boss 6 becomes apparent in appearance so that defective welding defects can be easily identified and removed.

As described above, the oil cooler according to the present invention can improve the cooling efficiency and corrosion resistance by forming the outer pipe, the booth and the tube which are actively in contact with the outside air with stainless steel having good thermal conductivity and corrosion resistance, and improve the outer pipe and the boss. Brazing welding can be performed at the time of joining, so that a large amount can be welded at the same time, thereby lowering manufacturing costs while improving productivity.

Claims (1)

The inner pipe 3 is inserted into the outer pipe 2, and both ends thereof are sealed to form a space 4 therebetween, and an inner pin 5 is inserted into the space 4, and the outer pipe ( In both ends of 2), the tube 6 is mounted in communication with the space 4 so that oil can flow therethrough, and the tube 7 is coupled to the boss 6 on one side. An oil cooler characterized by molding the outer pipe (2) and the boss (7) from stainless steel, and by forming the inner pipe (3) and the inner pin (5) in pure copper of C1220 series in brass.