WO2017188799A1

WO2017188799A1 - Dual mass flywheel having sealed pendulum

Info

Publication number: WO2017188799A1
Application number: PCT/KR2017/004618
Authority: WO
Inventors: 김건우; 임영민; 이성구
Original assignee: 주식회사 평화발레오; 발레오 앙브라이아쥐
Priority date: 2016-04-29
Filing date: 2017-04-28
Publication date: 2017-11-02
Also published as: KR101770063B1

Abstract

The present invention relates to a dual mass flywheel for ensuring anti-fouling and vibration-proofing and water-proofing functions by means of a shield structure using a shield plate for isolating an inner space from the outside, the flywheel comprising: a hub (10) linking with an engine crankshaft; a primary mass body (14) coupled to the hub (10); a drive plate (16) linking with the primary mass body (14) by means of a damper spring (18); a secondary mass body (20) coupled to the drive plate (16); a spline hub (12) coupled to the drive plate (16) and linking with an input shaft of a transmission; and a pendulum assembly (30) coupled to the spline hub (12) and disposed at a side part of the secondary mass body (20), wherein the pendulum assembly (30) has: an inner shield plate (32) fixed to the spline hub (12), and disposed so as to encompass an inner portion of the pendulum assembly (30); and an outer shield plate (34) fixed to the spline hub (12), and disposed so as to encompass an outer portion of the pendulum assembly (30).

Description

Dual mass flywheel with sealed pendulum

The present invention relates to a dual mass flywheel, and more particularly, as a shielding structure by a shield plate disposed on the outside of the flywheel, a seal capable of ensuring functions of resistance to earthquake, seismic resistance, and water resistance. A dual mass flywheel with a shaped pendulum.

In general, the engine of an automobile generates a torsional excitation force on the output side of the engine due to an imbalance of power generated by combustion pressure. Flywheels have been applied to solve such imbalances in power transmission, and recently, dual mass flywheels have been developed.

That is, the role of the flywheel in the automobile drive system is to use the moment of inertia to maintain a constant rotational speed and to lower the frequency variation value of the torsional vibration transmitted from the engine to ensure an advantageous effect in terms of NVH performance in the drive system. .

Recently, vehicles equipped with high-performance, high-power engines such as direct injection (GDI), turbocharger, supercharger, and twin turbo have been developed competitively. Therefore, a new application for improving the NVH performance of the drive system is being developed. Pendulum) is used to damp irregular vibrations generated by the engine.

However, since the pendulum applied to the conventional flywheel does not secure a structure that is effectively shielded from the outside, due to corrosion problems caused by moisture from the outside or contamination due to the inflow of various foreign substances, it is impossible to implement a normal function during durability. This results in a decrease in NVH performance of the drive system.

The technical problem to be solved by the present invention is a sealed pendulum capable of ensuring the functions of resistance to earthquake, seismic resistance and water resistance through a shielding structure by a shield plate that isolates the internal space from the outside. It is to provide a dual mass flywheel with assembly.

The present invention for solving the technical problem as described above is a hub interlocking with the crankshaft of the engine, a primary weight body coupled to the hub, a drive plate interlocking through the primary weight body and a damper spring, the drive plate A secondary weight body coupled to the drive plate, a spline hub coupled to the drive plate and interlocking with the input shaft of the transmission, and a pendulum assembly coupled to the spline hub and disposed on the side of the secondary weight body, wherein the pendulum assembly includes: And an inner shield plate fixed to the spline hub and disposed to surround the inner portion of the pendulum assembly, and an outer shield plate fixed to the spline hub and disposed to surround the outer portion of the pendulum assembly.

In the present invention, the radially outer free end of the inner shield plate and the radially outer free end of the outer shield plate are arranged to overlap each other.

In the present invention, the radially outer free end of the outer shield plate is bent to surround the radially outer free end of the inner shield plate radially outward.

In the present invention, the radially outer free end of the inner shield plate forms a first bent portion that is bent toward the outer shield plate, and the radially outer free end of the outer shield plate is the first bend of the inner shield plate. And forming a second bent portion that is bent toward the portion, wherein the second bent portion is disposed to surround the first bent portion in a radially outer side of the pendulum assembly.

In the present invention, the first bent portion and the second bent portion is characterized in that it is configured to be spaced apart from each other with a fine clearance in the axial direction and the radial direction, respectively.

In the present invention, the pendulum assembly is supported via a mounting plate with respect to the spline hub.

In the present invention, the pendulum assembly is provided with a support plate fixed to the spline hub and radially spaced apart the triangular opening, a roller in contact with the inclined inner peripheral surface of the opening, the concave surface for supporting the bottom of the roller A spacer accommodated in the opening, a stopper supporting a bottom portion of the spacer and rolling contact with a wavy bottom portion of the opening, and supported by the spacer and the stopper at both sides of the support plate, and a circumferential direction of the support plate. Pendulum is installed to be movable to, and on both sides of the support plate characterized in that it comprises a slider installed between the pendulum.

In the present invention, the inclined inner circumferential surface and the corrugated bottom surface are formed in a symmetrical shape on the central portion of the opening.

In the present invention, the waveform bottom portion is characterized in that the inflection point protruding toward the vertex of the inclined inner peripheral surface on the central portion in the circumferential direction.

In the present invention, the pendulum is characterized in that it comprises a through hole for coupling the spacer and both ends of the stopper.

The dual mass flywheel having a sealed pendulum according to an embodiment of the present invention can isolate the internal space of the pendulum assembly from the outside through a shielding structure by a shield plate disposed outside the flywheel. It will provide an effect of ensuring the durability performance of the pendulum assembly according to the (耐震) and the securing of water (耐水) function.

That is, the sealed pendulum assembly according to the present invention is a shielding structure by a shield plate disposed outside the flywheel, and isolates the space in which the pendulum is accommodated through the overlapping structure between the bent portions formed at the free end of the shield plate. This ensures normal endurance performance, even in harsh use environments, and prevents NVH performance degradation.

In addition, the present invention can effectively attenuate irregular vibration generated in the engine while driving by using a pendulum assembly installed in a separate shielded receiving space outside the flywheel, thereby improving the NVH performance of the vehicle. Will provide a beneficial effect.

1 is a half cross-sectional view illustrating a dual mass flywheel according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating only the pendulum assembly of FIG. 1 separated.

3 is an exploded perspective view showing the configuration of the pendulum assembly shown in FIG.

4A, 4B, and 4C are views illustrating a state in which the pendulum assembly shown in FIG. 2 is displaced according to the rotation direction of the flywheel.

* Explanation of Codes *

10-hub 12-spline hub

14--1 weight 16-drive plate

18-damper spring 20-second weight

30-pendulum assembly 32-inner shield plate

34-outer shield plate 36-mounting plate

38-support plate 40-roller

42-spacer 44-stopper

46-pendulum 48-slider

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

Referring to Figure 1, the dual mass flywheel according to the invention is a hub 10, which is installed to rotate in conjunction with the crankshaft (not shown) of the engine, spaced apart coaxially with the hub 10 and the input shaft of the transmission ( Spline hub 12 is installed to rotate in conjunction with the drive, the primary weight body 14 is installed to rotate in conjunction with the hub 10, the drive is installed to rotate in combination with the spline hub 12 Plate 16, a plurality of damper springs (18) radially installed between the primary weight 14 and the drive plate 16, coupled to the drive plate 16 and the primary weight ( 14 and a secondary weight body 20 disposed to surround the damper spring 18, and a pendulum assembly 30 coupled to the spline hub 12 and disposed on the side of the secondary weight body 20. It is configured to include).

Here, the primary weight 14 is provided with a ring gear 22 that interlocks with the starter of the engine on the radially outer side. In addition, the drive plate 16 is configured such that the projecting end portion 16a integrally formed on the radially outer side interlocks with the primary weight 14 with the damper spring 18 interposed in the radial direction.

On the other hand, the pendulum assembly 30 is fixed to the edge of the spline hub 12 and the inner shield plate 32 disposed to surround the inner portion of the pendulum assembly 30, and the spline hub 12 And an outer shield plate 34 fixed to an edge portion and disposed to surround an outer portion of the pendulum assembly 30.

In this case, the radially inner free end of the inner shield plate 32 and the radially inner free end of the outer shield plate 34 respectively overlap each other with respect to the radially outer edge of the spline hub 12. To be combined.

In addition, the radially outer free end of the inner shield plate 32 and the radially outer free end of the outer shield plate 34 are arranged to overlap each other to achieve a kind of shielding structure, in particular the outer shield plate ( The radially outer free end of 34 is configured to be bent in such a manner as to enclose the radially outer free end of the inner shield plate 32 radially outward.

More specifically, the radially outer free end of the inner shield plate 32 integrally forms a first bent portion 32a that is bent toward the outer shield plate 34, and the outer shield plate 34. The radially outer free end of is integrally formed with a second bent portion 34a which is bent toward the first bent portion 32a of the inner shield plate 32, the second bent portion 34a being the first bent portion 34a. One bent portion (32a) is configured to be disposed in the form of wrapping in the radially outer side of the pendulum assembly (30).

In this case, the first bent portion 32a of the inner shield plate 32 and the second bent portion 34a of the outer shield plate 34 are based on the axial direction and the radial direction of the spline hub 12. It is arranged to be spaced apart from each other with a fine play, so as to avoid mutual interference by abnormal changes in rotational inertia. Accordingly, the pendulum assembly 30 may actively block the inflow of foreign substances from the outside to the inside by the arrangement structure between the inner shield plate 32 and the outer shield plate 34, and thereby the pendulum assembly The function of sewage resistance, seismic resistance, and water resistance with respect to 30 can be ensured.

In addition, the pendulum assembly 30 is installed to support the mounting plate 36 with respect to the radially outer edge portion of the spline hub 12, in which case the mounting plate 36 is the secondary In consideration of the layout of the weight body 20, the pendulum assembly 30 is configured to be bent at a predetermined angle so that the pendulum assembly 30 may be disposed at a position spaced apart from the side of the secondary weight body 20.

That is, the radially inner free end of the inner shield plate 32 is first positioned with respect to the radially outer edge portion of the spline hub 12, and the mounting plate 36 is positioned outside the mounting plate ( At the outer side of 36, the radially inner edge of the outer shield plate 34 is located. In addition, the inner shield plate 32, the mounting plate 36 and the outer shield plate 34 with respect to the spline hub 12 is configured to be fastened together through a fixing means such as a single rivet (R) do.

In addition, the pendulum assembly 30 has a structure that is fixed and supported via the support plate 38 with respect to the radially outer free end of the mounting plate 36.

FIG. 2 is a perspective view showing only the pendulum assembly of FIG. 1, and FIG. 3 is an exploded perspective view showing the configuration of the pendulum assembly shown in FIG. 2.

Referring to FIGS. 2 and 3, the pendulum assembly 30 is provided with a roller 40 and a roller installed in contact with the inclined inner circumferential surface 38b formed in the opening 38a of the support plate 38. A spacer 42 installed at the upper portion with a concave surface 42a supporting the bottom portion of the bottom portion 40 and accommodated in the opening 38a, and a bottom surface of the opening portion 42a that supports the bottom portion of the spacer 42; A circumferential direction of the support plate 38 while being fixedly supported by the spacer 42 and the stopper 44 at both side portions of the stopper 44 and the support plate 38 installed in rolling contact with the portion 38c. A pair of pendulums 46 movably installed at both sides of the support plate 38 and between the support plates 38 and the pendulums 46 at both sides of the support plate 38. The friction of the pendulum (46) is reduced by A is configured to include a slider 48 that smoothly.

First, the support plate 38 is fixed to the spline hub 12, the opening 38a is formed in a substantially triangular shape and is radially spaced apart from the center of the support plate 38. .

In this case, the inclined inner circumferential surface 38b corresponds to a portion in rolling contact with the outer circumferential surface of the roller 40, and the corrugated bottom surface portion 38c corresponds to a portion in rolling contact with the bottom portion of the stopper 44. As such, the inclined inner circumferential surface 38b is configured to be disposed radially outward of the support plate 38 than the corrugated bottom surface 38c.

In addition, the inclined inner peripheral surface 38b and the corrugated bottom surface 38c are configured to be arranged in a symmetrical shape on the center of the opening 38a, and in particular, the corrugated bottom surface 38c is located on the central portion in the circumferential direction. It is configured to form an inflection point 38d that projects outward toward the vertex of the inclined inner circumferential surface 38b.

In addition, the pendulum 46 includes a through hole 46a penetrating a material, and the through hole 46a is disposed at both sides of the support plate 38 and the spacer 42 and the stopper 44. Through the combination with both ends of the to serve to stably support the pendulum 46.

Therefore, the pendulum assembly 30 configured as described above may attenuate irregular vibration generated in the engine to improve the NVH performance of the vehicle. The operation of the pendulum assembly 30 for this purpose is illustrated in FIGS. 4A and 4B and FIG. As shown in FIG. 4C, respectively.

FIG. 4A illustrates an operation state of the pendulum assembly 30 when the rotation of the flywheel is stopped according to the stop of the engine.

In this case, the roller 40 remains in contact with the outermost edge portion of the inclined inner circumferential surface 38b in the opening 38a of the support plate 38, and the bottom portion of the stopper 44 The state of being seated on the upper portion of the inflection point 38d located at the center of the waveform bottom portion 38c is maintained.

4B and 4C show changes in driving inertia inputted from the wheel to the flywheel in a situation such as sudden rotation of the flywheel according to the operation of the engine or sudden changes in torque input from the engine to the flywheel, deceleration, or stop. It shows the operating state of the pendulum assembly 30 accompanying.

In this case, the roller 40 moves along the inclined inner circumferential surface 38b in the opening 38a of the support plate 38, and the bottom portion of the stopper 44 moves the corrugated bottom portion 38c. Therefore, the left or the right is moved, which causes the pendulum 46 to move in the same direction.

In this process, the behavior posture of the pendulum 46 is in contact with the inclined inner circumferential surface 38b of the opening 38a by the roller 40 and the wavy bottom portion of the opening 38a by the stopper 44. Pendulum movement in the left and right directions with respect to the support plate 38 by the contact with (38c), the pendulum 46 of the pendulum 46 serves to effectively damp the irregular vibration generated in the flywheel Will be performed.

As described above with reference to the accompanying drawings for the preferred embodiment of the present invention, the present invention is not limited by the above-described specific embodiments, those of ordinary skill in the art to which the present invention belongs Various modifications and variations are possible within the scope of the spirit and scope of the present invention as set forth below.

Claims

A hub interlocked with the crankshaft of the engine;

A primary weight coupled to the hub;

A drive plate interworking with the primary weight body and a damper spring;

A secondary weight body coupled to the drive plate;

A spline hub coupled to the drive plate and interlocked with an input shaft of the transmission; And

A pendulum assembly coupled to the spline hub and disposed on the side of the secondary weight,

The pendulum assembly,

An inner shield plate fixed to the spline hub and disposed to surround an inner portion of the pendulum assembly; And

And an outer shield plate fixed to the spline hub and disposed to surround an outer portion of the pendulum assembly.
The method according to claim 1,

And a radially outer free end of the inner shield plate and a radially outer free end of the outer shield plate overlap each other.
The method according to claim 2,

And a radially outer free end of the outer shield plate is bent to enclose a radially outer free end of the inner shield plate radially outward.
The method according to claim 1,

A radially outer free end of the inner shield plate forming a first bent portion that is bent toward the outer shield plate, and a radially outer free end of the outer shield plate bend toward a first bent portion of the inner shield plate And a second bent portion, wherein the second bent portion is disposed to surround the first bent portion in a radially outer side of the pendulum assembly.
The method according to claim 4,

And the first bent portion and the second bent portion are spaced apart from each other with a fine clearance in the axial direction and the radial direction, respectively.
The method according to claim 1,

And the pendulum assembly is supported via a mounting plate relative to the spline hub.
The method according to claim 1,

The pendulum assembly,

A support plate fixed to the spline hub and disposing radially spaced openings;

A roller in contact with the inclined inner circumferential surface of the opening;

A spacer accommodated in the opening having a concave surface supporting the bottom portion of the roller;

A stopper supporting the bottom of the spacer and making a cloud contact with the bottom of the corrugation of the opening;

A pendulum supported by the spacer and the stopper at both sides of the support plate and installed to be movable in the circumferential direction of the support plate; And

Dual mass flywheel, characterized in that it comprises a slider which is installed between the pendulum on both sides of the support plate.
The method according to claim 7,

And the inclined inner circumferential surface and the corrugated bottom surface are formed in a symmetrical shape on a central portion of the opening.
The method according to claim 7,

And the wave bottom surface portion forms an inflection point projecting toward a vertex of the inclined inner circumferential surface on a central portion of the circumferential direction.
The method according to claim 7,

And the pendulum includes a through hole for coupling the spacer to both ends of the stopper.