阅读说明：本技术 具有附加质量的双质量飞轮 (Dual mass flywheel with additional mass ) 是由 罗曼·魏森博恩 于 2021-06-23 设计创作，主要内容包括：本发明涉及一种具有初级侧(2)和次级侧(3)的双质量飞轮(1),所述初级侧和次级侧能够围绕共同的旋转轴线(R)抵抗弧形弹簧(4)的复位力矩相对于彼此扭转,其中在次级侧(3)上设置有质量环(27),在所述双质量飞轮中,附加质量无需穿通孔就能够可松开地安装在初级飞轮盘中,其方式为：质量环(27)包括至少局部环绕的内直径,所述质量环径向地在容纳机构(26)的至少局部环绕的外直径处固定并且轴向地通过卡环(31)固定。(The invention relates to a dual mass flywheel (1) having a primary side (2) and a secondary side (3) which can be rotated relative to one another about a common axis of rotation (R) against a restoring torque of an arc spring (4), wherein a mass ring (27) is provided on the secondary side (3), in which dual mass flywheel an additional mass can be releasably mounted in a primary flywheel disk without through-holes, in such a way that: the mass ring (27) comprises an at least partially circumferential inner diameter, which is fixed radially at an at least partially circumferential outer diameter of the receiving means (26) and is fixed axially by means of a snap ring (31).)

1. A dual mass flywheel (1) having a primary side (2) and a secondary side (3) which can be rotated relative to one another about a common axis of rotation (R) against a restoring moment of an arcuate spring (4), wherein a mass ring (27) is arranged on the secondary side (3),

it is characterized in that the preparation method is characterized in that,

the mass ring (27) comprises an at least partially circumferential inner diameter, is radially fixed at an at least partially circumferential outer diameter of the receiving means (26) and is axially fixed by means of a snap ring (31).

2. A twin mass flywheel as defined in claim 1 in which the mass ring (27) has at least one protrusion (29) which projects into a corresponding recess (30) in the receiving means (26).

3. A twin mass flywheel as defined in claim 1 or 2 in which the snap ring (31) is secured in a groove (32) in the receiving means (26).

4. A twin mass flywheel as defined in any previous claim in which the containment means (26) is a containment disc (24) riveted to the secondary flange (8).

5. A twin mass flywheel as defined in claim 1 in which the containment disc (24) comprises a fastening flange (25) and a containment flange (26).

6. A twin mass flywheel as defined in any of claims 1 to 3 in which the containment means (26) is part of an output flange (15) which is riveted to the secondary flange (8).

7. A twin mass flywheel as defined in any previous claim in which the containment means (26) comprises an axial stop (34).

8. A twin mass flywheel as defined in any previous claim in which the snap ring (31) is a disc spring.

9. A twin mass flywheel as defined in any previous claim which has a centrifugal pendulum device (9) on the secondary side.

10. A method for installing a dual mass flywheel according to any of the preceding claims, the method having the steps of:

-mounting at least a primary flywheel disc (5), an arc spring (4), a pre-mounted secondary flange assembly (8, 9, 13, 14, 15, 16, 26) and a primary mass cover (6),

-placing the mass ring (27) onto the secondary flange assembly (8, 9, 13, 14, 15, 16, 26),

-mounting the snap ring (31).

Technical Field

The invention relates to a dual mass flywheel having a primary side and a secondary side which can be rotated relative to one another about a common axis of rotation against a restoring moment of an arc spring, wherein a mass ring is arranged on the secondary side.

Background

In order to save installation space and costs, the plate thickness of the primary flywheel disk is usually reduced as much as possible in the case of dual clutch dampers. If the through hole provided as the main rivet for establishing the secondary sub-assembly is eliminated, the plate thickness can be further reduced. In this case, the secondary side must be pre-mounted and mounted with the primary side by means of already performed main riveting. The additional mass ring must be welded to the output flange.

Disclosure of Invention

The object of the invention is to provide a dual mass flywheel in which the additional mass can be releasably mounted in the primary flywheel disk without through-holes.

The problem is solved by a dual mass flywheel according to the invention. Preferred embodiments, embodiments or improvements of the invention are given in this text.

The above-mentioned problem is solved in particular by a dual mass flywheel having a primary side and a secondary side which can be rotated relative to one another about a common rotational axis against the restoring moment of the arcuate spring, wherein a mass ring is provided on the secondary side, wherein the mass ring comprises an at least partially circumferential inner diameter, wherein the mass ring is radially fixed at the at least partially circumferential outer diameter of the receiving means and is axially fixed by a snap ring.

In one embodiment of the invention, the mass ring has at least one projection which projects into a corresponding recess in the receiving means. Preferably, a plurality of projections and corresponding recesses are distributed over the circumference. This results in a form-fitting connection of the mass ring to the receiving means in the axial direction and in the circumferential direction.

In one embodiment of the invention, the snap ring is secured in a groove in the receiving mechanism. The groove can be produced simply and cost-effectively and results in a secure fastening of the snap ring, which can furthermore be detached again.

In one embodiment of the invention, the receiving means is a receiving disk, which is riveted to the secondary flange. In one embodiment of the invention, the containment tray comprises a fastening flange and a containment flange. The receiving flange is riveted to the rest of the secondary side during installation, so that the secondary flange and in particular the output hub can be permanently used from the existing series.

In an alternative embodiment of the invention, the receiving means is part of an output flange, which is riveted to the secondary flange, so that the receiving disk can be dispensed with as an additional component.

In one embodiment of the invention, the receiving means comprises an axial stop. Here, preferably, the projection of the mass ring is pressed onto the axial edge of the recess. Thereby, additional stop mechanisms, such as extended areas or the like, can be dispensed with.

In one embodiment of the invention, the snap ring is formed by a disk spring or a disk spring. The disk spring rests with its inner edge at least in regions on the mass ring and with its outer circumference in a groove of the receiving means. The mass ring is thereby pressed axially into its seat or stop mechanism.

In one embodiment of the invention, the dual mass flywheel has a centrifugal force pendulum device on the secondary side, which results in an increase in the damping effect.

The problem mentioned at the outset is also solved by a method for mounting a dual mass flywheel according to the invention, having the following steps:

-mounting at least a primary flywheel disc, an arc spring, a pre-mounted secondary flange assembly and a primary mass cover,

-positioning a mass ring onto the secondary flange assembly,

-mounting a snap ring.

The secondary flange arrangement comprises all the components, i.e. the secondary flange, the output flange, the disk spring sealing film and, if appropriate, the receiving disk and, if appropriate, the spacer ring and, if appropriate, further components, which are connected to one another by means of a main rivet connection.

The solution according to the invention of the object provides that the mass ring is fastened to the vibration damper by means of a snap ring which also exerts an axial force on the mass ring and can be detached again if necessary. Here, the snap ring produced by the punching process is arranged like a disk spring. The snap ring can be reduced in diameter and placed axially in position when installed, as with the snap ring according to DIN 472. The snap ring is axially prestressed in the manner of a disk spring. In the final position, the mounting tool is released (as in DIN 472) and the snap ring engages into the predetermined groove and can be supported in said groove and in the part to be joined (mass ring), with its axial force likewise being supported on the part to be joined.

Drawings

Embodiments of the invention are explained in detail below with reference to the drawings. Shown here are:

figure 1 shows a cross-section of a first embodiment of a dual mass flywheel 1 according to the invention,

figure 2 shows a top view of the embodiment of figure 1,

figure 3 shows a top view of one embodiment of a snap ring,

figure 4 shows an axial cross-section of the snap ring of figure 3,

figure 5 shows another cross-sectional view through the embodiment of figure 1,

figure 6 shows a cross-sectional view of a second embodiment of a dual mass flywheel 1 according to the invention,

fig. 7 shows another cross section through the embodiment of fig. 6.

Detailed Description

Fig. 1 shows a radial section through the arrangement of a dual mass flywheel 1 according to the invention. The dual mass flywheel 1 comprises a primary mass or primary side 2 and a secondary mass or secondary side 3 which can be twisted relative to each other about an axis of rotation R against the force of an arc spring 4. In the following, unless otherwise specified, the axial direction is understood to be a direction parallel to the rotation axis R, the radial direction is understood to be a direction perpendicular to the rotation axis R, and the circumferential direction is understood to be a rotation around the rotation axis R.

The primary mass 2 comprises a primary flywheel disc 5 and a primary mass cover 6. The primary flywheel disk 5 and the primary mass cover 6 enclose an arc-shaped spring receptacle 7 in which the arc-shaped spring 4 is arranged, if appropriate a plurality of arc-shaped springs 4 being arranged. The bow spring 4 is supported by one spring end on the primary mass 2, for example on a stop pressed into the bow spring receptacle 7. The arcuate springs 4 are supported by means of the respective other spring end on a flange limb of the secondary flange 8. The flange wings extend radially outwards and enclose the spring ends of the arcuate springs 4.

A centrifugal pendulum device 9 is arranged on the secondary flange 8. The centrifugal force pendulum device comprises a plurality of pendulum masses 10, each of which comprises a pendulum part mass 11, 12 firmly connected to one another, which is mounted so as to be pivotable relative to the secondary flange 8 via a pendulum roller, not shown, which is accommodated in a kidney-shaped track of the secondary flange 8 and of the pendulum part masses 11, 12.

The secondary flange 8 is firmly riveted to the output hub 15 by means of main riveted rivets 13. A spacer ring 14 is provided between the secondary flange 8 and the output hub 15. The rivets 13 are arranged distributed over the main riveting ring. The disk spring sealing membrane 16 is fastened to the secondary side 3 by means of a main rivet connection. The disk spring sealing film 16 is in contact with the primary mass cover 6 by way of its outer region, so that the arcuate spring receptacle 7 is sealed off from the environment. A sliding ring 17, which can be glued or snapped on, for example, is provided in the contact region between the disk spring sealing foil 16 and the primary mass cover 6.

On the outer circumference of the arc-shaped springs 4, sliding housings 18 are provided on the primary flywheel disc 5, which reduce friction and wear of the arc-shaped springs 4 with respect to the primary flywheel disc 5. A starter ring gear 19 is fastened, for example shrink-fitted or welded, to the outer circumference of the primary flywheel disk 5. The cover disc 20 is fastened to the primary flywheel disc 5 by means of a stamped part 21. The output hub 15 comprises a plug-in toothing 22 for connection to the transmission input shaft. The primary flywheel disc 5 is riveted to a flexible plate 23 which can be connected to the crankshaft of the internal combustion engine in a manner known per se.

The receiving disk 24 is riveted to the secondary flange 8, the spacer ring 14 and the output hub 15 by means of the main riveted rivet 13. The receiving disk 24 comprises an annular fastening flange 25 and a substantially hollow-cylindrical receiving flange 26. The mass ring 27 is pushed onto the receiving flange 26. As shown in fig. 2, the mass ring 27 has, in the region of its inner circumference, centering seats 28 and in each case inwardly extending projections 29 between the centering seats 28, which projections project into corresponding recesses 30 in the receiving flange 26. The centering seat 28 bears against the outer circumference of the fastening flange 26 and fixes the mass ring 27 in the radial direction. In the direction of the secondary flange 8, the mass ring 27 is fixed by a projection 29, which in the recess 30 rests against the secondary flange-side edge of the recess 30. The fastening in the opposite direction, i.e. against pulling off from the receiving flange 26, is effected by a snap ring 31 which is arranged in a circumferential groove 32 in the receiving flange 26.

Fig. 2 shows a plan view of the dual mass flywheel 1 of fig. 1, and fig. 3 and 4 show separate views of the snap ring 31. The snap ring has a constant outer diameter R_AThe outer diameter corresponds to the inner diameter of the bottom of the groove 32. The inner diameter is variable, so that the radial height of the snap ring varies over the circumference and is greatest in relation to the opening at which holes 33 for receiving an installation tool are provided on both sides. The snap ring can be mounted in the groove 32 like an expansion ring by means of the hole 33. The snap ring 31 is shaped as a disc spring as shown in fig. 4. Fig. 5 shows a cross-sectional view through the projection 29 of the embodiment of fig. 1. The recess 30 forms an axial stop 34 against which the mass ring 27 or the projection 29 is pressed by the spring action of the snap ring 31.

Fig. 6 and 7 show an alternative embodiment of a dual mass flywheel 1 according to the invention. In the embodiment shown, the output hub 15 has a fastening flange 25 which extends radially outwards and which carries a receiving flange 26. Instead of an additional component, the mass ring is therefore fastened to the output hub 15.

List of reference numerals:

1 dual mass flywheel

2 primary side

3 secondary side

4 arc spring

5 Primary flywheel disc

6 Primary mass cover

7 arc spring containing part

8 Secondary flange

9 centrifugal force pendulum device

10 pendulum mass

11 pendulum part mass

Mass of 12 pendulum parts

13 rivet

14 spacer ring

15 output hub

16-disc spring sealing film

17 slip ring

18 sliding shell

19 starting ring gear

20 cover plate

21 punch part

22 plug-in tooth

23 Flexible plate

24 containment tray

25 fastening flange

26 receiving flange

27 mass ring

28 centering seat

29 projection

30 recess

31 snap ring

32 groove

33 holes in snap ring

34 stop