KR102148500B1 - Torque Converter for Vehicle - Google Patents

Abstract

The present invention relates to a torque converter for a vehicle, and more particularly, in the configuration of a lock-up clutch for direct connection between an engine and a torque converter, by configuring a heat dissipation portion on a contact surface of a front cover to which the lock-up clutch contacts, the contact surface is deformed by thermal energy. It relates to a torque converter for a vehicle that can be prevented from occurring.

Description

Torque Converter for Vehicle {Torque Converter for Vehicle}

The present invention relates to a torque converter for a vehicle, and more particularly, in the configuration of a lock-up clutch for direct connection between an engine and a torque converter, by configuring a heat dissipation portion on a contact surface of a front cover to which the lock-up clutch contacts, the contact surface is deformed by thermal energy. It relates to a torque converter for a vehicle that can be prevented from occurring.

In general, a torque converter for a vehicle is installed between an engine and a transmission of a vehicle and transmits the driving force of the engine to a transmission using a fluid.

The torque converter increases the rate of change of torque by directing the flow of the impeller that rotates by receiving the driving force of the engine, the turbine that is formed facing the impeller and is rotated by the oil discharged from the impeller, and the oil flowing back to the impeller to the direction of rotation of the impeller. It includes a reactor (also referred to as a'stator') to make it.

In addition, the torque converter is equipped with a lock-up clutch (also called a'damper clutch') that can directly connect the engine and the transmission because the power transmission efficiency may decrease when the load acting on the engine increases. The lock-up clutch is disposed between the turbine and the front cover directly connected to the engine so that the rotational power of the engine can be transmitted directly to the transmission through the turbine.

This lockup clutch includes a piston axially movable on the turbine shaft. In addition, when the lock-up clutch is operated, a torsion damper is provided that can absorb shock and vibration acting in the direction of rotation.

At this time, the front cover has a contact surface in contact with the lock-up clutch, and the contact surface may be damaged or deformed by thermal energy.

That is, when thermal energy generated by manufacturing and maintenance of a torque converter such as circumferential welding is transferred to the contact surface, the contact surface may be damaged or deformed by thermal energy, and a lock-up clutch is placed on the contact surface where damage or deformation occurs. In the case of contact, not only the power cannot be efficiently transmitted, but also there is a concern that vibration and noise may occur through the separation gap.

Republic of Korea Patent Publication No. 10-1509458 (2015.04.01.)

The present invention was conceived to solve the above-described problems, and an object of the present invention is to dissipate heat energy to the contact surface of the front cover to which the lockup clutch contacts in a lock-up clutch configuration for direct connection between an engine and a torque converter. It is to provide a torque converter for a vehicle capable of preventing vibration and noise generated by damage and deformation at the contact surface by preventing the contact surface from being deformed by thermal energy by configuring a radiating unit with a heat dissipation unit.

The torque converter for a vehicle according to the present invention includes a front cover 100, an impeller 200 coupled to the front cover 100 and rotating together, a turbine 300 disposed at a position facing the impeller 200, and , A reactor 400 located between the impeller 200 and the turbine 300 to change the flow of oil from the turbine 300 toward the impeller 200, and the front cover 100 and the turbine 300 In a vehicle torque converter including a lock-up clutch 500 in contact with the front cover 100 so as to directly connect, the front cover 100 radiates heat energy from a contact surface in contact with the lock-up clutch 500. It characterized in that it includes;

In addition, the heat dissipation part is characterized in that it includes a first heat dissipation part 110 including a heat diffusion plate 111 provided inside the front cover 100.

In addition, the thermal diffusion plate 111 is characterized in that it is formed of at least one selected from a copper material and a copper alloy material.

In addition, the first heat dissipation unit 110 may further include a reinforcing plate 120 provided to block the heat diffusion plate 111 from the outside.

In addition, the heat dissipation unit further includes a second heat dissipation unit 120 extending from the front cover 100 in a direction of the lock-up clutch 500 and including a contact surface in contact with the lock-up clutch 500 It features.

In addition, the second heat dissipation unit 120 is characterized in that it is formed of bimetal.

In the torque converter for a vehicle according to the present invention, in the configuration of a lock-up clutch for direct connection between an engine and a torque converter, by configuring a heat dissipation unit capable of dissipating thermal energy to a contact surface of the front cover to which the lock-up clutch contacts, the contact surface is deformed by thermal energy. There is an advantage of preventing the occurrence of vibration and noise caused by damage and deformation on the contact surface.

In addition, the torque converter for a vehicle according to the present invention can prevent the contact surface of the front cover from being deformed and damaged by thermal energy due to operations such as circumferential welding, thereby reducing the defect rate due to the manufacture of the torque converter. have.

1 is a cross-sectional view showing a torque converter for a vehicle according to a first embodiment of the present invention
2 to 3 are partial cross-sectional views showing a torque converter for a vehicle according to a first embodiment of the present invention
4 is a partial cross-sectional view showing a torque converter for a vehicle according to a second embodiment of the present invention
5 is another view showing a vehicle torque converter according to a second embodiment of the present invention in a partial cross-sectional view

Hereinafter, a torque converter for a vehicle according to the present invention as described above will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing a vehicle torque converter according to a first embodiment of the present invention, and FIGS. 2 to 4 are views showing a partial cross-sectional view of a vehicle torque converter according to a first embodiment of the present invention.

1 and 2, the torque converter 1000 for a vehicle according to the first embodiment of the present invention is largely a front cover 100, an impeller 200, a turbine 300, a reactor 400, and a lock-up clutch ( 500).

The front cover 100 is connected to the crankshaft of the engine and is formed to be rotatable in a circumferential direction with a rotational shaft that is a center of rotation.

The impeller 200 is formed by being combined with the front cover 100, so that the impeller 200 rotates together about the rotation axis of the front cover 100, and includes a plurality of blades.

The turbine 300 is positioned opposite to the impeller, and includes a plurality of blades facing the blade of the impeller 200. The turbine 300 rotates in response to the rotation of the impeller 200, thereby transmitting the driving force to the transmission through the hub.

The reactor 400 is located between the impeller 200 and the turbine 300 and can be controlled to change the flow of oil from the turbine 300 side to the impeller 200 and transmit it, and is also referred to as a stator.

The lock-up clutch 500 is a means for directly connecting the engine and the transmission, and may be formed in a disk shape, and may include a piston 510 that can move in the direction of the rotation axis of the front cover 100, and the lock-up clutch ( A torsion damper for absorbing torsional force acting in the rotation direction of the shaft and attenuating vibration by transmitting the driving force transmitted through 500) to the turbine 300 may be further provided.

In addition, the lock-up clutch 500 may include a friction surface 501 formed on a surface in contact with the front cover 100.

In this case, the front cover 100 of the torque converter 1000 for a vehicle according to the first embodiment of the present invention includes a heat dissipation unit for dissipating thermal energy from a contact surface in contact with the lock-up clutch 500.

The heat dissipation unit dissipates thermal energy from the contact surface in contact with the lock-up clutch 500, so that deformation occurs on the contact surface due to thermal energy, and thus noise and vibration may be prevented during operation of the vehicle torque converter.

To describe in more detail about the heat dissipation unit, the heat dissipation unit of the vehicle torque converter according to the first embodiment of the present invention is a first heat dissipation unit 110 made of a heat diffusion plate 111 provided on the inside of the front cover 100 Includes.

That is, the heat dissipation part of the vehicle torque converter 1000 according to the first embodiment of the present invention includes the first heat dissipation part 110 made of a heat diffusion plate 111 provided inside the front cover 100, thereby spreading thermal energy. Through the heat dissipation from the contact surface.

Particularly, during circumferential welding, since it is possible to prevent the contact surface from being deformed or damaged by thermal energy, it is possible to prevent generation of vibration and noise due to the operation of the vehicle torque converter.

At this time, since the heat diffusion plate 111 of the first heat dissipation unit 110 is formed of a material having a high thermal conductivity, heat dissipation through heat diffusion must be performed, and for this purpose, the heat diffusion plate 111 is made of a copper material or a copper alloy material. It is preferable that it is made of at least one or more materials.

3, the first heat dissipation unit 110 of the vehicle torque converter 1000 according to the first embodiment of the present invention further includes a reinforcing plate 112 provided to block the heat diffusion plate 111 from the outside. It can be done by doing.

That is, when the heat diffusion plate 111 is provided inside the front cover 100, heat dissipation may be performed through heat diffusion, but the strength of the front cover 100 may be decreased due to the heat diffusion plate 111. There is concern.

To this end, the first heat dissipation unit 110 can prevent the heat diffusion plate 111 from being damaged or damaged from the outside through the reinforcing plate 112, and also compensates for a decrease in strength of the front cover 100. It is desirable to do.

At this time, the reinforcing plate 112 is preferably made of a steel plate, but it is possible to prevent damage and deformation of the heat diffusion plate 111, as well as supplementing the strength of the front cover 100 and the torque converter 1000. It goes without saying that various embodiments of materials are possible as long as the rotational motion is not disturbed.

<Second Example>

4 is a partial cross-sectional view of a torque converter for a vehicle according to a second embodiment of the present invention.

Referring to FIG. 4, the heat dissipation unit includes a second heat dissipation unit 120 extending from the front cover 100 in a direction of the lock-up clutch 500 to be in contact with the lock-up clutch 500.

The second heat dissipation unit 120 extends from the front cover 100 in the direction of the lock-up clutch 500 and includes a contact surface, which is a surface in contact with the lock-up clutch 500 and in contact with the lock-up clutch 500.

That is, the second heat dissipation unit 120 is spaced apart from the front cover 100 and formed to be in contact with the lock-up clutch 500, so that the second heat dissipation unit 120 can perform a role of directly transmitting the driving force to the turbine 300, Through a space spaced apart from the front cover 100, heat may be radiated through the fluid contained in the torque converter.

5 is another view showing a vehicle torque converter according to a second embodiment of the present invention in a partial cross-sectional view.

Referring to FIG. 5, the second heat dissipation unit 120 of the vehicle torque converter 1000 according to the second embodiment of the present invention may be made of bimetal.

Bimetal is manufactured by attaching two types of thin metals that have different degrees of expansion and contraction according to the change of temperature, and when the temperature increases, the metal with a large coefficient of thermal expansion expands and bends in the opposite direction, and when the increased temperature goes down again, the original It is characterized by returning to the state.

At this time, the second heat dissipation unit 120 of the vehicle torque converter 1000 according to the second embodiment of the present invention is made of bimetal, but it is preferable to form a metal having a large coefficient of thermal expansion in the direction of the lock-up clutch 500.

In more detail, the second heat dissipation unit 120 is spaced apart from the front cover 100 and can radiate heat through fluid in the space therethrough, while the surface having a contact surface in contact with the lock-up clutch 500 There is insufficient space for performing heat dissipation through a short distance or contact with the silver lockup clutch 500.

Accordingly, the second heat dissipation unit 120 is formed of bimetal, but by providing a metal having a large coefficient of thermal expansion in the direction of the lock-up clutch 500, when the temperature increases, the second heat dissipation unit 120 is the front cover 100 It is bent in the direction, and a space apart from the lock-up clutch 500 can be secured through this, so that heat can be radiated through the fluid accommodated in the space.

That is, the second heat dissipation unit 120 is formed to bend in the direction of the front cover 100 when the temperature rises, so that not only the surface formed in the direction of the front cover 100 but also the direction of the lock-up clutch 500 Heat dissipation can be performed up to the surface.

This prevents damage and deformation of the contact surface in contact with the lock-up clutch 500 by rapidly performing heat dissipation when the temperature of the front cover 100 rises, thereby preventing noise generated by damage and deformation of the contact surface during operation of the torque converter. And vibration can be prevented.

1000: vehicle torque converter
100: front cover
200: impeller
300: turbine
400: reactor
500: lock-up clutch
501: friction surface
510: piston
110: first heat dissipation unit
111: heat diffusion plate
112: reinforcement plate
113: external heat dissipation unit
120: second heat dissipation unit

Claims (6)

A front cover 100, an impeller 200 coupled to the front cover 100 and rotating together, a turbine 300 disposed at a position facing the impeller 200, the impeller 200 and a turbine The reactor 400 located between 300 and changing the flow of oil from the turbine 300 toward the impeller 200 and the front cover 100 and the front cover to directly connect the turbine 300 In the vehicle torque converter comprising a lock-up clutch 500 in contact with 100),
The front cover 100 includes a radiating part for dissipating heat generated by contact with the lock-up clutch 500,
The heat dissipation unit includes a heat diffusion plate 111 provided inside the front cover 100 and a reinforcing plate 120 provided to block the heat diffusion plate 111 from the outside.
delete The method of claim 1,
The heat diffusion plate 111 is
A torque converter for a vehicle formed of at least one selected from a copper material and a copper alloy material. delete delete delete

Images