KR102088665B1 - Torque convertor for vehicle - Google Patents

Abstract

A vehicle torque converter is disclosed. A torque converter for a vehicle according to an embodiment of the present invention includes a front cover; An impeller coupled to the front cover and rotating together; A turbine disposed at a position facing the impeller; A reactor located between the impeller and the turbine to change the flow of oil from the turbine toward the impeller; A lock-up clutch having a piston directly connecting the front cover and the turbine; And a torsional damper coupled to the lock-up clutch to absorb shock and vibration acting in the rotational direction. Including, the torsional damper is a damper retaining plate coupled to the piston; A plurality of elastic members mounted on the damper retaining plate to exert elastic force in a circumferential direction; And acting as a reaction force against the elastic members, including a driven plate coupled to the turbine, and spring ends surrounding the outer circumferential surface of the elastic member may be mounted at both ends of the elastic member.

Description

TORQUE CONVERTOR FOR VEHICLE

The present invention relates to a torque converter for a vehicle, and more particularly, to a vehicle torque converter with an improved spring seat supporting an elastic member.

In general, a torque converter is installed between a vehicle's engine and a transmission to transmit the driving force of the engine to the transmission using fluid. Such a torque converter, an impeller rotating by receiving the driving force of the engine, a turbine rotated by oil discharged from the impeller, and a reactor that increases the rate of torque change by directing the flow of oil flowing back to the impeller in the rotational direction of the impeller ( Also known as 'stator'.

The torque converter is equipped with a lock-up clutch (also called a 'damper clutch'), which is a means of directly connecting 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 front cover and the turbine 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 that can move axially on the turbine shaft. In addition, a friction material that is in frictional contact with the front cover is coupled to the piston. In addition, a torsional damper capable of absorbing shock and vibration acting in the rotational direction of the shaft when the friction material is coupled to the front cover is coupled to the piston.

The above-described torsional damper is provided with elastic members capable of absorbing torsional torque in the rotational direction when the lock-up clutch is operated so as to directly transmit the driving force of the engine to the transmission through the turbine.

In addition, spring sheets are disposed at both ends of the elastic members to prevent the elastic members from coming off. That is, both ends of the elastic members are supported by spring seats.

However, during the operation of the torsional damper, as the spring mounted on the damper retaining plate is compressed, the outer circumferential surface of the elastic member and the damper retaining plate contact each other, and friction may occur as the contact area is increased.

As described above, when the contact area between the elastic member and the damper retaining plate is increased, the durability of the elastic member decreases, the hysteresis torque of the elastic member increases, and the torsional torque of the torsional damper decreases, resulting in poor productity of the torque converter. have.

The matters described in this Background section are intended to enhance the understanding of the background of the invention, and may include matters not previously known to those of ordinary skill in the art.

Therefore, the present invention was invented to solve the above problems, and the problem to be solved by the present invention is provided in a torsional damper, and a spring sheet is formed to form a gap between the elastic member and the damper retaining plate. By configuring, it is intended to provide a torque converter for a vehicle that reduces the contact area between the elastic member and the damper retaining plate.

In addition, another object of the present invention is to reduce the contact area between the elastic member and the damper retaining plate through the gap during the operation of the torsional damper, thereby increasing the hysteresis torque reduction and durability of the elastic member, and torsion of the torsional damper. An object of the present invention is to provide a torque converter for a vehicle that prevents torque from being reduced and increases productivity.

A vehicle torque converter according to an embodiment of the present invention for achieving this object includes a front cover; An impeller coupled to the front cover and rotating together; A turbine disposed at a position facing the impeller; A reactor located between the impeller and the turbine to change the flow of oil from the turbine toward the impeller; A lock-up clutch having a piston directly connecting the front cover and the turbine; And a torsional damper coupled to the lock-up clutch to absorb shock and vibration acting in the rotational direction. Including, the torsional damper is a damper retaining plate coupled to the piston; A plurality of elastic members mounted on the damper retaining plate to exert elastic force in a circumferential direction; And acting as a reaction force against the elastic members, including a driven plate coupled to the turbine, and spring ends surrounding the outer circumferential surface of the elastic member may be mounted at both ends of the elastic member.

The spring seat body portion is formed in a cylindrical shape with one surface open and the other surface closed; And a coupling groove formed along a longitudinal direction from the opened one surface of the body toward the other closed surface, and one end of the elastic member is partially inserted.

On the inner circumferential surface of the coupling groove, hills and valleys may be alternately formed along the longitudinal direction so that the outer circumferential surface of the elastic member is screwed.

The mountains and valleys may be formed to be rounded corresponding to the shape of the elastic member.

When the elastic member is mounted on the damper retaining plate, the spring sheet may form a gap at a predetermined interval between the damper retaining plate and the outer surface of the elastic member.

An inner elastic member may be disposed inside the elastic member.

The inner elastic member may be alternately arranged along the circumferential direction of the damper retaining plate.

In the damper retaining plate, a plurality of seat supports may be formed along the circumferential direction corresponding to the mounting position of the elastic member to support the closed other surface and the outer circumferential surface of the body part.

According to the torque converter for a vehicle according to the embodiment of the present invention as described above, by providing a spring sheet to form a cap between the elastic member and the damper retaining plate provided on the torsional damper, the elastic member and the damper retaining plate It has the effect of reducing the contact area of.

In addition, the present invention is configured by assembling the spring sheet mounted on the elastic member, and pre-assembled the spring sheet on the elastic member, to prevent the spring sheet from being detached from the elastic member, and easily mounted on the damper retaining plate By doing so, there is also an effect of improving the assembling property and mounting property.

In addition, the present invention has the effect of increasing the stability of the operation can be prevented from the elastic member is separated from the damper retaining plate.

In addition, the present invention reduces the hysteresis torque and the durability of the elastic member by reducing the contact area between the elastic member and the damper retaining plate through the gap during the operation of the torsional damper, while at the same time increasing the torsional torque of the torsional damper. There is also an effect of preventing the reduction and increasing the overall merchandise of the torque converter.

1 is a cross-sectional view of a vehicle torque converter according to an embodiment of the present invention cut in an axial direction.
2 is a view showing a main part of a torsional damper in a vehicle torque converter according to an embodiment of the present invention.
3 is a perspective view of a damper retaining plate equipped with an elastic member in a torque converter for a vehicle according to an embodiment of the present invention.
4 is a perspective view of a spring seat supporting elastic members in a vehicle torque converter according to an embodiment of the present invention.
5 is a cross-sectional view taken along line BB of FIG. 5.
6 is an enlarged view of part A of FIG. 3.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, the configuration shown in the embodiments and drawings described herein is only one of the most preferred embodiments of the present invention and does not represent all of the technical spirit of the present invention, and can replace them at the time of this application. It should be understood that there may be various equivalents and variations.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification.

Since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to that shown in the drawings, and the thickness is enlarged to clearly express various parts and regions.

And throughout the specification, when a part "includes" a certain component, it means that other components may be further included instead of excluding other components unless specifically stated otherwise.

In addition, terms such as “... unit”, “... means”, “... unit”, and “... absent” described in the specification refer to a unit of comprehensive configuration that performs at least one function or operation. it means.

1 is a cross-sectional view of a vehicle torque converter according to an embodiment of the present invention cut in an axial direction, and FIG. 2 is a diagram showing a main part of a torsional damper in a vehicle torque converter according to an embodiment of the present invention, and FIG. 3 Is a perspective view of a damper retaining plate equipped with an elastic member in a torque converter for a vehicle according to an embodiment of the present invention, and FIG. 4 is a perspective view of a spring seat supporting elastic members in a torque converter for a vehicle according to an embodiment of the present invention, 5 is a cross-sectional view taken along the line BB of FIG. 5, and FIG. 6 is an enlarged view of part A of FIG.

1 is a semi-sectional view for explaining an embodiment of the present invention, showing a vehicle torque converter according to an embodiment of the present invention.

The torque converter for a vehicle of the embodiment of the present invention is connected to a crankshaft on the engine side and rotates a front cover (1), an impeller (3) connected to the front cover (1), and a position facing the impeller (3) Turbine (5) disposed in, and is located between the impeller (3) and the turbine (5) to change the flow of oil coming out of the turbine (5) is also referred to as a reactor (7, or 'stator') to transfer to the impeller (3) ). The reactor 7 for transferring oil to the impeller 3 side has the same rotation center as the front cover 1. And the lock-up clutch 9 used as a means for directly connecting the engine and the transmission is disposed between the front cover 1 and the turbine 5.

The lock-up clutch 9 has a piston 11 having a substantially disc shape. And the piston 11 is rotatable in the center direction of the shaft and is arranged to be moved in the axial direction.

On the other hand, the lock-up clutch 9 is coupled with a torsional damper 20, which serves to absorb torsional forces acting in the rotational direction of the shaft and attenuate vibrations.

Referring to FIG. 2, the torsional damper 20 is provided with elastic members 21 that absorb shock and vibration acting in a circumferential direction. These elastic members 21 are arranged in a circumferential direction (rotation direction) and are preferably made of a compressed coil spring.

These elastic members 21 are supported by the retaining plate 23 coupled to the piston 16 described above. And the elastic members 21 are elastically supported by a driven plate 25 coupled to the turbine 5.

That is, the elastic members 21 are elastically supported between the damper retaining plate 23 and the driven plate 25, as shown in FIG. 3, to absorb vibration and shock in the rotational direction (circumferential direction). You can.

Here, an inner elastic member 22 may be disposed inside the elastic member 21.

The inner elastic member 22 may be alternately disposed inside the elastic member 21 along the circumferential direction of the damper retaining plate 23.

That is, when the inner elastic member 22 is disposed on one elastic member 21, the inner elastic member 21 is disposed adjacent to both sides of one elastic member 21 on which the inner elastic member 22 is mounted, respectively, The elastic member 22 is not disposed.

In addition, the inner elastic member 22 may be disposed on each elastic member 21 disposed adjacent to both sides of the elastic member 21 to which the inner elastic member 22 is not mounted.

Meanwhile, spring seats 30 surrounding the outer circumferential surface of the elastic member 21 may be mounted at both ends of the elastic member 21 according to an embodiment of the present invention.

This spring seat 30, as shown in Figures 4 and 5, includes a body portion 31 and the engaging groove (33).

First, the body portion 31 is formed in a cylindrical shape with one surface open and the other surface closed. That is, the body portion 31 may be formed of a circular cap.

And the engaging groove 33 is formed along the longitudinal direction from the opened one surface of the body portion 31 toward the other closed surface so that one end of the elastic member 21 is inserted.

Here, on the inner circumferential surface of the coupling groove 33, the mountain 35 and the valley 37 may be alternately formed along the longitudinal direction so that the outer circumferential surface of the elastic member 21 is screwed.

The mountain 35 and the valley 37 may be formed to be rounded corresponding to the shape of the elastic member 21 formed of a circular coil spring.

That is, when the spring 35 is assembled to the elastic member 21, the roundly formed mountain 35 and the valley 37 minimize friction with the elastic member 21, and at the same time induce a smooth fastening, elastic The member 21 can be prevented from being damaged.

The spring seats 30 formed as described above are first mounted on both ends of the elastic members 21 before the elastic members 21 are mounted on the damper retaining plate 23.

Here, as the spring seat 30 is screwed while being rotated to the elastic member 21 through the mountain 35 and the valley 37 formed in the coupling groove 33, shock and vibration absorption of the torsional damper 20 It can be prevented from being separated from the elastic member 21 at the time.

That is, the spring seat 30 is stably coupled to both ends of the elastic member 21 through the mountain 35 and the valley 37 formed in the coupling groove 33.

When assembly of the spring sheet 30 to the elastic member 21 is completed, the elastic member 21 assembled with the spring sheet 30 is mounted on the damper retaining plate 23.

Here, the damper retaining plate 23 has a plurality of seat supports 23a at equal intervals along the circumferential direction corresponding to the mounting position of the elastic member 21 to support the closed other surface and the outer circumferential surface of the body part 31. It can be formed at a spaced location.

Accordingly, the spring seat 30 assembled to the elastic member 21, the outer circumferential surface and the other closed surface is stably supported by the seat support 23a, so that the elastic member 21 is detached from the damper retaining plate 23 Can be prevented.

On the other hand, when the elastic member 21 is mounted on the damper retaining plate 23, as shown in FIG. 6, the spring seat 30 is of the damper retaining plate 23 and the elastic member 21 A gap G of a predetermined interval may be formed between the outer surfaces.

The gap G prevents the outer peripheral surface of the elastic member 21 from directly contacting the damper retaining plate 23 when the torsional damper 20 is not operated.

On the contrary, when the torsional damper 20 is operated, buckling occurs in the central portion of the elastic member 21 due to the centrifugal force and bending load acting on the elastic member 21. At this time, the gap G minimizes the contact between the outer peripheral surface of the elastic member 21 and the damper retaining plate 23, thereby reducing the contact area, so that the hysteresis torque of the elastic member 21 can be reduced.

Therefore, when applying the vehicle torque converter according to the embodiment of the present invention configured as described above, it is provided to the torsional damper 20, the gap between the elastic member 21 and the damper retaining plate 23 ( By configuring the spring seat 30 to form G), it is possible to reduce the contact area between the elastic member 21 and the damper retaining plate 23.

In addition, the spring sheet 30 is configured as an assembly type, and the spring sheet 30 is preassembled before the elastic member 21 is mounted on the damper retaining plate 23, so that the spring sheet 30 is an elastic member ( It is possible to improve the assembling property and the mounting property by preventing the separation from 21) and making it easy to mount on the damper retaining plate 23.

In addition, it is possible to prevent the elastic member 21 from being detached from the damper retaining plate 23, thereby increasing the stability of operation.

In addition, by reducing the contact area between the elastic member 21 and the damper retaining plate 23 during the operation of the torsional damper 20, the hysteresis torque reduction and durability of the elastic member 21 are increased, and The torsional torque of the national damper 20 can be prevented from being reduced, thereby increasing the overall merchandise of the torque converter.

As described above, although the present invention has been described by a limited number of embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following will be described by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the equivalent scope of the claims to be described.

1: Front cover
3: Impeller
5: turbine
7: Reactor
9: Lockup clutch
11: piston
20: torsional damper
21: elastic member
22: inner elastic member
23: damper retaining plate
23a: seat support
25: driven plate
30: spring seat
31: body
33: coupling groove
35: mountain
37: Goal

Claims (8)

Front cover;
An impeller coupled to the front cover and rotating together;
A turbine disposed at a position facing the impeller;
A reactor located between the impeller and the turbine to change the flow of oil coming out of the turbine to the impeller side;
A lock-up clutch having a piston directly connecting the front cover and the turbine; And
A torsional damper coupled to the lock-up clutch to absorb shock and vibration acting in the rotational direction; Including,
The torsional damper
A damper retaining plate coupled to the piston;
A plurality of elastic members mounted on the damper retaining plate to exert elastic force in a circumferential direction; And
A driven plate that acts as a reaction force against the elastic members and is coupled to the turbine; Including,
Spring seats surrounding the outer circumferential surface of the elastic member are mounted to both ends of the elastic member, respectively.
When the elastic member is mounted on the damper retaining plate, the spring sheet prevents the outer peripheral surface of the elastic member from directly contacting the damper retaining plate, or the outer peripheral surface of the elastic member and the damper retaining plate. To minimize the contact area to form a gap between the damper retaining plate and the outer surface of the elastic member to minimize the contact area,
The spring seat
A body portion formed in a cylindrical shape with one surface open and the other surface closed; And
A coupling groove formed along a longitudinal direction from the opened one surface of the body toward the other closed surface, and one end of the elastic member is partially inserted; It includes,
The inner circumferential surface of the coupling groove minimizes friction with the elastic member, and at the same time induces a smooth fastening, while preventing the elastic member from being damaged, alternating mountains and valleys along the longitudinal direction so that the outer circumferential surface of the elastic member is screwed. A torque converter for a vehicle, characterized in that it is formed of. delete delete According to claim 1,
The mountains and valleys
A torque converter for a vehicle, characterized in that it is formed to be rounded corresponding to the shape of the elastic member. delete According to claim 1,
Inside the elastic member
A torque converter for a vehicle, characterized in that an inner elastic member is disposed. The method of claim 6,
The inner elastic member
A torque converter for a vehicle, which is arranged alternately along the circumferential direction of the damper retaining plate. According to claim 1,
The damper retaining plate
A torque converter for a vehicle, characterized in that a plurality of seat support portions are formed along the circumferential direction in correspondence to the mounting position of the elastic member to support the closed other surface and the outer circumferential surface of the body portion.

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