CN106051040B

CN106051040B - Centrifugal force pendulum

Info

Publication number: CN106051040B
Application number: CN201610216902.8A
Authority: CN
Inventors: S·马延沙因
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2015-04-10
Filing date: 2016-04-08
Publication date: 2021-01-26
Anticipated expiration: 2036-04-08
Also published as: CN106051040A; DE102015206451A1

Abstract

The invention relates to a centrifugal force pendulum (6) having a carrier part (7) arranged so as to be rotatable about a rotational axis (d) and a pendulum mass (12) suspended in a manner such that it can oscillate in a centrifugal force field relative to the carrier part, wherein the carrier part (7) is formed by two side parts (8, 9) having an axially extending intermediate space (11), and pendulum masses (12) arranged distributed in the circumferential direction are arranged in the intermediate space (11), which are formed by a plurality of axially stacked pendulum mass parts (13) and are arranged on the side parts (8, 9) by means of a pendulum support (14). In order to improve the oscillation behavior of the pendulum masses (12), the pendulum mass parts (13) of the individual pendulum masses (12) are elastically coupled to one another.

Description

Centrifugal force pendulum

Technical Field

The invention relates to a centrifugal pendulum, comprising: a holder member provided rotatably about a rotation axis; and a pendulum mass suspended in a manner of oscillating relative to the carrier part in the centrifugal force field, wherein the carrier part is formed by two side parts, which have an axial intermediate space and in which pendulum masses arranged distributed in the circumferential direction are arranged, the pendulum masses being formed by a plurality of axially stacked pendulum mass parts and being arranged on the side parts by means of a pendulum support.

Background

The centrifugal force pendulum is used for rotational speed-adaptive rotational vibration isolation and is installed in particular in the drive train of an internal combustion engine having rotational vibrations. The rotational vibration isolation is carried out in that a pendulum mass suspended in a manner that oscillates in the centrifugal force field on the carrier part stores the energy generated by the torque peaks as potential energy during this period and then outputs it again to the drive train. The centrifugal force pendulum can be arranged, for example, as is known from WO2014/082629a1, on a single mass flywheel, for example, made of sheet metal. As is known, for example, from publications WO2014/023303 a1 and DE 102013201981 a1, one or more centrifugal force pendulums can be arranged on the rotary vibration damper, on the clutch disk in accordance with publication WO 2014/114280 a1, on the hydrodynamic torque converter in accordance with publication EP 2600030 a1, on the housing of the friction clutch or in a similar position in the drive train. The pendulum masses distributed in the circumferential direction can be arranged, for example, as is known from WO2014/082629a1, axially between the two side parts forming the carrier part.

Disclosure of Invention

The object of the invention is to provide an advantageous embodiment of the centrifugal force pendulum. The object of the invention is, in particular, to propose an improved centrifugal force pendulum having a pendulum mass consisting of a plurality of components.

The proposed centrifugal force pendulum is provided in particular for the drive train of a motor vehicle and can be used separately as a rotational speed-adaptive rotational vibration damper. Alternatively, the centrifugal force pendulum can be integrated into other units of the drive train, for example into a rotational vibration damper on the input side and/or output side, for example into a dual mass flywheel, into a clutch disk, into a friction clutch, into a hydrodynamic torque converter, onto a rotor of an electric machine or the like. In the case of an arrangement of the centrifugal force pendulum in combination with the hydrodynamic torque converter, the centrifugal force pendulum can be arranged inside or outside the converter housing, i.e. operated wet or dry. For example, the carrier part of the centrifugal force pendulum can be arranged on a rotational vibration damper (for example a so-called Lock-Up damper) of the converter tap clutch

) ) to the input and/or output.

The support part is designed as a pendulum mass support part which is arranged in a rotatable manner about a rotational axis and on which at least two, preferably between two and six, pendulum masses which are distributed in the circumferential direction and are displaceable by means of two pendulum rollers which are spaced apart from one another in the circumferential direction are arranged. The support part rotating about the axis of rotation is formed by two side parts which, between themselves, form an axially extended region which receives the pendulum mass. The pendulum mass is formed from a plurality of, for example, two axially stacked pendulum mass parts. The pendulum masses are suspended in a pendulum manner on the side parts by means of pendulum supports spaced apart in the circumferential direction. The pendulum supports are each formed by a pendulum roller and a guide rail arranged on the side piece and on the pendulum mass part, the pendulum rollers rolling on the guide rail under the effect of the centrifugal force of the pendulum mass accelerating radially outward.

The pendulum rollers each roll on a guide rail having a predetermined shape curve, which are arranged complementary to one another in the pendulum mass and in the side part. For this purpose, notches are provided in each case, and guide rails are introduced into these notches. In this case, a pendulum roller overlaps the notches in the pendulum masses and in the side pieces, so that the pendulum support is formed therefrom. The shape of the shape curve of the guide rail is used to predetermine the pivoting path of the pendulum mass (as is the case with pivoting vibrations), for example free-form pivoting vibrations or pivoting vibrations of a pendulum mass unit suspended on a parallel pendulum mass carrier or trapezoidal suspended on a pendulum mass carrier, corresponding to a double wire.

In order to obtain a damping of the pendulum mass parts of the pendulum masses that are freely movable relative to one another or are fixedly connected to one another and to provide a limited relative movement of the pendulum mass parts relative to one another, the pendulum mass parts of the individual pendulum masses are elastically coupled to one another. For example, an elastic coupling of axially adjacent pendulum mass parts is provided, in particular in the circumferential direction. The damping can be achieved not only in the coupling element, which is elastically coupled thereto, for example by energy dissipation of the elastic body, but also by friction of the pendulum mass parts against one another. In this way, the pendulum mass part or the inherent movement of the pendulum mass, which causes additional loading of the pendulum support or noise formation, can be reduced by itself.

According to an advantageous embodiment, the pendulum mass parts can be connected to one another by means of at least one elastic coupling element. For example, a plurality of coupling elements spaced apart from one another in the circumferential direction and/or in the radial direction can be provided on the pendulum mass. For example, one or more coupling elements can be arranged radially inside, at the same radial height or radially outside the pendulum support.

The at least one coupling element may be made of plastic, for example an elastomer. The coupling element can be connected to the pendulum mass part in a friction-locking, material-locking and/or form-locking manner. In particular, for a rigid adaptation of the displacement of the pendulum masses relative to one another, at least one coupling element between the two pendulum mass parts can have a cross-sectional constriction, for example a constriction, or a material weakening realized in another way (for example in the form of an opening, a profile, an embossing, a porous structure, or the like).

In an advantageous embodiment, at least one coupling element can fix the pendulum mass parts at a predetermined distance from one another in the axial direction. The distance can be set in a gap between the pendulum mass parts, a defined friction torque or a friction lock. As long as the distance between the pendulum mass parts can be substantially zero. For example, the at least one coupling element can be widened radially into two adjacent pendulum mass parts relative to the receiving portion between the two pendulum mass parts, for example with an annular collar that sets the distance between the pendulum mass parts in an adjustable manner. The at least one coupling element may be multi-part. For example, one part can be relatively soft, i.e. less hard, for example constructed from an elastomer, while the other part is constructed hard. For example, the at least one coupling member may be constructed from a sleeve and a core. The core, which axially positions the pendulum mass part relative to the side part, can be designed to be relatively stiff. In this case, the core can be designed to be longer in the axial direction than the sleeve, for example, in order to adjust the axial distance set between the side part and the adjacent pendulum mass part. For example, the end face sides of the pin-shaped core can be of round (verrundet) design.

The pendulum mass parts can be displaced in a limited manner in relation to one another in the circumferential direction against the action of a friction device. Furthermore, friction surfaces made of metal, coated friction surfaces or friction surfaces of spacers are provided on the sides of the pendulum mass parts facing each other, which friction surfaces form the friction device.

The pendulum mass part can be formed, for example, from a sheet metal part produced by means of a stamping process.

Drawings

The invention is explained in detail with the aid of the exemplary embodiments shown in fig. 1 to 8. The figures show:

figure 1 shows the upper part of a torque converter with a centrifugal force pendulum arranged around a rotational axis,

figure 2 detail view of the centrifugal force pendulum of figure 1,

FIG. 3 is a partial sectional view of the centrifugal force pendulum of FIGS. 1 and 2 with a multi-part coupling element,

figure 4 is a partial cross-sectional view of a multi-piece coupling element as a variation of the multi-piece coupling element of figure 3,

figure 5 is a partial sectional view of a pendulum mass with a one-piece coupling element,

figure 6 is a partial sectional view of the pendulum mass variant of figure 5,

fig. 7 is a partial sectional view of a one-piece pendulum mass in comparison to the pendulum mass variants of fig. 5 and 6, and

fig. 8 is a partial sectional view of a one-piece pendulum mass with respect to the pendulum mass variants of fig. 5 to 7, which has axially spaced pendulum mass portions.

Detailed Description

Fig. 1 shows a section through the upper part of a torque converter 1 arranged around a rotational axis d. Received in the converter housing 2 is a converter tap clutch 3, which has a downstream torsional vibration damper 4. A centrifugal force pendulum 6 is arranged on the output part 5 of the torsional vibration damper 4, the carrier part 7 of which is formed by a side part 8 and a side part 9 connected to the side part 8 by means of rivets 10. The

side parts

8, 9 form an axial intermediate space 11 radially on the outside, in which, for example, two to six pendulum masses 13 distributed in the circumferential direction are received. It is to be understood that the centrifugal force pendulum 6 can also be arranged on another component of the drive train that rotates about the axis of rotation by means of the carrier element 7.

In the exemplary embodiment shown, the pendulum masses 12 are each formed from two axially stacked pendulum mass parts 13. The pendulum masses 12 and thus the pendulum mass parts 13 are suspended in a pendulum-like manner from the

side parts

8, 9 by means of a pendulum support 14 under the centrifugal force shown here. For this purpose,

notches

15, 16 are introduced into the

side parts

8, 9 and into the pendulum mass parts, said notches having

guide rails

17, 18 which define the pendulum form of the pendulum mass 12 and on which axially overlapping pendulum rollers 19 roll.

In order to connect the pendulum mass parts 13 in a manner that can be displaced relative to one another in a limited manner, in the exemplary embodiment shown, two elastic coupling elements 20 are provided, which are introduced into openings 21 of the two pendulum mass parts 13 radially outside the pendulum support 14. In the exemplary embodiment shown, the coupling element 20 is formed in two parts from a sleeve 22 (made of an elastomer) and a core 23 received in the sleeve. The core 23 in this case extends axially beyond the sleeve 22 and sets the predetermined distance of the pendulum mass 12 relative to the

side parts

8, 9.

Fig. 2 shows a partial view of the centrifugal force pendulum 6 of fig. 1 in a view of the pendulum mass part 13 of the pendulum mass 12 with the upper side part removed. The pendulum mass part 13 is supported against centrifugal forces relative to the carrier part 7 (only the side part 9 is visible here) by means of pendulum rollers 19 which roll on the guide rails 17, 18 of the

notches

15, 16 and, in dependence on the torque fluctuations introduced into the carrier part 7, swings on a swing path which is predetermined by the shape curves of the guide rails 17, 18. Radially outside the pendulum support 14, a coupling element 20 is introduced, which has a sleeve 22 made of an elastomer and a core 23 received in the sleeve.

Fig. 3 shows a detail of a sectional view of the centrifugal force pendulum 6 of fig. 1 and 2 with two

side parts

8, 9 and a pendulum mass 12 at the radial level of a coupling element 20, which preferably connects the pendulum mass part 13 elastically in the circumferential direction. The elastic connection is produced by means of a sleeve 22, while the pin-shaped core 23 projects with its circular end-face-side end region 24 in the axial direction beyond the width of the pendulum mass part 13 and is in contact connection with the

side parts

8, 9, so that a distance, such as an axial gap 25, is set between the

side parts

8, 9 and the pendulum mass part 13 adjacent thereto.

In a modification of the elastic coupling of the pendulum mass element 13 in relation to fig. 1 to 3, fig. 4 shows a partial section through the pendulum mass 12a with the pendulum mass part 13a elastically coupled by means of the two-part coupling element 20 a. In the exemplary embodiment shown, pendulum mass part 13a comprises a recess 26a, in which coupling element 20a is received without an axial coating (Auftrag). In this case, the two pendulum mass parts 13a are elastically coupled to one another by means of the sleeve 22a of the coupling element 20 a. The end region 24a of the core 23a, which is embodied in the form of its rivet head or rivet head, overlaps the bottom of the recess 26a in the radial direction and at a distance from it and thereby fixes the two pendulum mass parts 13a to one another in the axial direction. Due to the pretensioning force between the friction surfaces 28a of the pendulum mass parts 13a facing each other or the formation of the gap 27a, a friction torque can be generated when the pendulum mass parts are displaced relative to each other, preferably in the circumferential direction.

Fig. 5 shows a partial section through a pendulum mass 12b with a pendulum mass part 13b which is elastically coupled by means of a one-piece coupling element 20b in a modification of the

pendulum masses

12, 12a from the above figures. The one-piece coupling element 20b can be pressed into the opening 21b of the pendulum mass part 13b and is made of an elastomer. As in all proposed pendulum masses, the damping and the hysteresis of the limited displacement of the pendulum mass parts 13b relative to one another can be set by energy dissipation of the elastic body and/or setting a friction torque between the pendulum mass parts 13 b.

Fig. 6 shows a modified pendulum mass 12c in the same illustration as the pendulum mass 12b of fig. 5, the pendulum mass 12c having a coupling element 20c, the coupling element 20c having a radial narrowing 29c between the two pendulum mass parts 13 c. The radial narrowing 29c can be used to adjust the rigidity of the elastic coupling which sets the two pendulum mass parts 13 c.

Fig. 7 shows a modified pendulum mass 12d in the same sectional view as

pendulum masses

12b, 12c of fig. 5 and 6. The coupling element 20d, which is elastically coupled to the pendulum mass parts 13d and is in one piece, limits the maximum axial displacement of the pendulum mass parts relative to one another by means of its conically widened end region 30 d. A corresponding gap 27d is set by the distance of the end regions from one another, which is adjustable between the pendulum mass parts 13 d.

Fig. 8 shows a modified pendulum mass 12e in the same sectional view as the

pendulum masses

12b, 12c, 12d of fig. 5 to 7, which has a pendulum mass part 13e and a one-piece elastic coupling element 20 e. In the variant of the coupling elements 20b to 20d of fig. 5 to 7, the coupling element 20e has a central radially widened annular flange 31e which is received in a corresponding notch 32e of the pendulum mass part 13 e. The coupling element 20e is received, for example pressed, into an opening 21 of the pendulum mass part 13 e. The thickness of the annular collar 31e and the axial recess of the recess 32e are matched to one another in such a way that an axially elastically adjustable gap 27e is formed.

List of reference numerals

1 Torque converter

2 transducer housing

3 converter tapping clutch

4-rotary vibration damper

5 output member

6 centrifugal force pendulum

7 support part

8 side member

9 side member

10 rivet

11 intermediate space

12 pendulum mass

12a pendulum mass

12b pendulum mass

12c pendulum mass

12d pendulum mass

12e pendulum mass

13 pendulum mass part

13a pendulum mass part

13b pendulum mass part

13c pendulum mass part

13d pendulum mass part

13e pendulum mass part

14 pendulum support

15 notch

16-notch

17 guide rail

18 guide rail

19 swing roller

20 coupling element

20a coupling element

20b coupling element

20c coupling element

20d coupling element

20e coupling element

21 opening

21b opening

21e opening

22 sleeve

22a sleeve

23 core

23a core

24 end region

24a end region

25 axial gap

26a recess

27 gap

27d gap

27e gap

28a friction surface

29c narrowing

30d end region

31e annular flange

32e notch

d axis of rotation

Claims

1. A centrifugal force pendulum (6) having: a bracket member (7) arranged rotatably about a rotation axis (d); and pendulum masses (12, 12a, 12b, 12c, 12d, 12 e) suspended in a manner that they can be pivoted in relation to the carrier element in the centrifugal force field, wherein the carrier element (7) is formed by two side elements (8, 9) having an axially extended intermediate space (11), and pendulum masses (12, 12a, 12b, 12c, 12d, 12 e) arranged distributed in the circumferential direction are arranged in the intermediate space (11), which pendulum masses are formed by a plurality of axially stacked pendulum mass parts (13, 13a, 13b, 13c, 13d, 13 e) and are arranged on the side elements (8, 9) by means of pendulum support elements (14), characterized in that the pendulum mass parts (13, 13a, 13b, 13c, 13d, 13 e) of the same pendulum mass (12, 12a, 12b, 12c, 12d, 12 e) are elastically coupled to one another, and the pendulum mass parts (13, 13a, 13b, 13c, 13d, 13 e) are connected to each other by means of at least one elastic coupling element, at least one elastic coupling element (20) being formed by a sleeve (22) and a core (23) which axially positions the pendulum mass part (13) relative to the side parts (8, 9).

2. The centrifugal force pendulum (6) of claim 1, further comprising at least one elastic coupling element arranged radially outside the pendulum support (14).

3. The centrifugal force pendulum (6) according to claim 1 or 2, characterized in that at least one of the elastic coupling elements is made of an elastomer.

4. The centrifugal force pendulum (6) according to claim 1 or 2, characterized in that at least one of the elastic coupling elements has a narrowing (29 c) between two pendulum mass parts (13 c).

5. The centrifugal force pendulum (6) according to claim 1 or 2, characterized in that it further comprises at least one elastic coupling element to fix the pendulum mass parts (13, 13a, 13b, 13c, 13d, 13 e) at a predetermined distance from each other in the axial direction.

6. The centrifugal force pendulum (6) according to claim 1 or 2, characterized in that it further comprises at least one of the elastic coupling elements in a multi-part construction.

7. The centrifugal force pendulum (6) according to claim 1, characterized in that at least one of the elastic coupling elements is formed by an elastic sleeve (22 a) and a core (23 a) having an end region (24 a) that fixes the pendulum mass parts (13 a) to one another in the axial direction.

8. Centrifugal force pendulum (6) according to claim 1 or 2, characterized in that the pendulum mass parts (13, 13a, 13b, 13c, 13d, 13 e) are displaceable in a limited manner relative to each other in the circumferential direction against the action of a friction means.