WO2017050326A1

WO2017050326A1 - Centrifugal pendulum device

Info

Publication number: WO2017050326A1
Application number: PCT/DE2016/200398
Authority: WO
Inventors: Waldemar Weimann; Gerd Ahnert; Gerhard Gander
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2015-09-22
Filing date: 2016-08-25
Publication date: 2017-03-30
Also published as: DE112016004278A5; DE102016216935A1

Abstract

A centrifugal pendulum device for arrangement in the drivetrain of a motor vehicle, having at least one pendulum mass which is arranged on at least one carrier disc and which, along a predefined pendulum path, can perform a relative movement with respect to the carrier disc, wherein a flat sliding element is arranged at least between one of the pendulum masses and one of the carrier discs.

Description

Centrifugal pendulum device

The invention relates to a centrifugal pendulum device for arrangement in the drive train of a motor vehicle, with at least one pendulum mass, which is arranged on at least one carrier disk and can perform a relative movement to the carrier disk along a predetermined pendulum track.

To reduce torsional vibrations, additional moving masses are mounted as so-called pendulum masses on a rotating part of the torsional vibration system. In the field of centrifugal acceleration, these masses vibrate on predetermined orbits when excited by rotational equality. Due to these vibrations, the exciter vibration is deprived of energy at appropriate times and fed back, so that there is a damping of the excitation oscillation, the pendulum mass as

Vibration damper works. Since both the natural frequency of the centrifugal pendulum oscillation and the excitation frequency are proportional to the speed, a

Tilgerwirkung a centrifugal pendulum over the entire frequency range of the excited by rotational impulses vibrations are achieved. A centrifugal pendulum device (FKP) of the type in question serves to reduce vibrations and noise in the drive train of a motor vehicle. Such a centrifugal pendulum device comprises at least one pendulum mass, which is suspended for example by means of carrier rollers or the like on a rotating carrier disk and along predetermined pendulum paths can perform a relative movement to the carrier disk, in order to occupy a variable distance from the axis of rotation of the carrier disk. The construction and the function of such a centrifugal force pens is described, for example, in DE 10 2006 028 552 A1. The Pendulum masses are mounted on the carrier disc by means of rollers. The rollers run in oblong holes of the carrier disc and slots of the pendulum masses.

In addition to a centrifugal pendulum device with a carrier disk, on both sides of which pendulum masses of a pendulum mass are arranged, centrifugal pendulum devices are also known in which the pendulum masses are arranged between two axially spaced apart carrier discs.

For axial storage and leadership several solutions are known. Roller centering rims on the rollers, as disclosed for example in DE 10 2006 028 556 A1, keep the pendulum part masses at a defined distance from the carrier disk. The rollers have Borde or diameter steps as Rollenenzentrierborde. By the contact of the side surfaces of the Rollenenzentrierborde, which may be additionally profiled conically or otherwise, to the respective opposite pendulum parts or flange an axial bearing is achieved. On these are the pendulum against the rollers and these in turn supported against the flange. Indirectly, the pendulums are guided in relation to the flange. The problem is the dimensioning of the components and the openings in the pendulum masses and the carrier disk, for example, to prevent immersion of the Rollenenzentrierborde, and the durability of the components.

The rollers may alternatively be axially guided by lateral starting areas relative to the outer pendulum part masses. Deformed spacers or contact points (friction points) can be realized by shaping the pendulum part masses or the carrier disk in the form of, for example, elevated raised areas. It is also possible to install additional components only for this purpose. The guide parts have suitable sliding properties such as a low coefficient of friction and high wear resistance.

The problem is that these components from the surface of the respective part, z. B. the pendulum plate, protrude. When moving the pendulum masses must therefore be prevented that hook these projections in openings of the opposite component. The dimensioning and positioning is correspondingly severely limited. Due to the consequently small contact surface only a relatively small wear volume can be realized.

As a further solution, the use of additional rolling elements was proposed axially between the moving parts. The rolling elements are arranged in grooves of the respective surfaces. The disadvantage here is at least the increased production costs.

It has also been proposed to provide areas of the support on both sides with a support disk. The roller is axially guided by lateral starting areas relative to the outer pendulum part masses. The support disks are intended to guide the rollers axially on both sides with respect to the carrier and thus cause an indirect bearing of the pendulums relative to the carrier. In addition, these support disks could be used to create a closed composite of segments of the carrier disk, wherein the carrier ring is pre-assembled from individual segments. The advantage of the cheap carrier segment production is u. a. the disadvantage of a more complex installation compared.

An object of the invention is therefore to provide a solution which avoids the disadvantages described above. This problem is solved by a centrifugal pendulum device according to claim 1. Preferred embodiments, refinements or developments of the invention are specified in the dependent claims.

The above-mentioned problem is in particular solved by a centrifugal force pendulum device for arrangement in the drive train of a motor vehicle, with at least one pendulum mass arranged on at least one carrier disc and capable of relative movement to the carrier disc along a predetermined pendulum path, at least one of the pendulum masses and one of the carrier disks is arranged a flat sliding element. If the centrifugal pendulum device comprises a carrier disk on which pendulum sub-masses are arranged on both sides, the abovementioned problem is in particular also solved by a centrifugal pendulum device for arrangement in the drive train of a motor vehicle, with at least two pendulum masses arranged on a carrier plate and along a predetermined pendulum track can perform a relative movement to the support disk, wherein the pendulum masses each comprise two pendulum masses, which are arranged on both sides of the support disk, and wherein at least one of the pendulum masses and the support disk, a flat sliding element is arranged.

A flat sliding element is understood to mean a sliding element whose radial extent and extent in the circumferential direction is significantly greater than its axial height. An advantage of using such a flat sliding element is that no holes, recesses, elevations or the like must be introduced or worked into the surface of the pendulum part mass or the carrier disk. In addition, both the attachment between sliding element and pendulum part mass or carrier disc serving contact surface is very large and the Sliding surface with the respective counterpart. The former increases the durability and resilience of the surface compound, such as an adhesive bond, the latter reduces the frictional effect.

The flat sliding element covers a large part of the gap between pendulum mass or pendulum part mass and carrier disk in the radial direction and in the circumferential direction. Preferably, the flat sliding element is designed so that it comes in contact with a predominant surface portion of the pendulum mass at a start of the pendulum mass, so that only a low surface pressure occurs. In one embodiment of the invention, the sliding element covers more than half the surface of the pendulum mass. In one embodiment of the invention, therefore, the sliding element covers the majority of the surface of the pendulum mass facing the carrier disk. The sliding element can also almost completely cover the surface of the pendulum mass facing the carrier disk.

The sliding element is fastened either to the carrier disk or to the pendulum mass or pendulum component mass. For this purpose, the sliding element is adhesively bonded to the carrier disk or pendulum mass in one embodiment of the invention. Alternatively, the sliding element is injection-molded onto the carrier disk or the pendulum mass with a plastic region. The respective pendulum mass or pendulum part mass can, for. B. as an insert in an injection molding tool in the necessary areas with plastic. Alternatively, in each case a separate sheet metal part with coating can be used instead of a plastic guide part. This additional part can then be mounted in each case on the inside of the pendulum plates (facing the carrier plate). As an alternative to plastic guide parts, other suitable materials such as ceramic composite materials may be used.

In one embodiment of the invention, the sliding element is connected to the carrier disk, the pendulum mass or pendulum component mass by means of a clip connection, which allows a particularly easy assembly.

The sliding element and the pendulum mass or pendulum part mass have, in one embodiment of the invention, bores for receiving cylindrical stepped bolts, wherein the bores in the sliding element have a larger diameter than the bores in the pendulum part mass and thus contribute to fastening of the sliding element relative to the pendulum part mass ,

In one embodiment of the invention, in each case a flat sliding element are arranged between all pendulum mass or pendulum masses and the or the carrier disc (s). When attached to the carrier disk, it can also be a single sliding element on each side of the carrier disk or opposite sides of the carrier disks, each covering all pendulum masses.

In one embodiment of the invention, an almost full-surface guide element is arranged as a sliding element respectively on the pendulum inner side or on both sides of the pendulum mass. Since all pendulums are equipped with this guide element is a relatively simple and safe production and assembly feasible. The large-area design ensures a high wear volume and thus high wear resistance. Since no areas protrude from the pendulum inside, hooking into the contours or openings of the inner support disc is impossible. The guide parts can z. B. be created from a plastic with advantageous sliding properties and high wear resistance. The guide parts can be manufactured as a flat item and z. B. be fixed by gluing each on the pendulum masses. Alternatively or additionally, a positional fixation by the collar shape of the rivet bolts for connecting two pendulum masses can be done.

Embodiments of the invention are explained below with reference to the accompanying drawings. Showing:

1 shows a detail of an embodiment of a centrifugal pendulum device according to the invention in a spatial representation, Fig. 2 shows the detail of FIG. 1 without pendulum part mass,

3 shows a section l-l through a first embodiment of a centrifugal pendulum device according to the invention,

4 shows a section through a second embodiment of a centrifugal pendulum device according to the invention, FIG. 5 shows a pendulum part mass with sliding element arranged thereon.

1 and 2 show a detail of an embodiment of a centrifugal pendulum device 1 according to the invention in a spatial representation. The centrifugal pendulum device 1 comprises a carrier disk 2 with an opening 3. The carrier disk 2 is screwed or riveted in the installed position with a secondary flange or primary flange, not shown, of a dual mass flywheel, a clutch housing or a clutch back plate or the like. such Arrangements of a centrifugal pendulum in the drive train of a motor vehicle are described for example in DE 10 2006 028 556 A1.

On the outer circumference of the support plate 2 a plurality of pendulum masses 4 are arranged. The pendulum masses 4 each comprise two pendulum masses 5a and 5b, which are respectively arranged on both sides of the support plate 2. The pendulum masses 5a and 5b of the pendulum mass 4 are each firmly connected to each other and slidably or movably mounted relative to the support plate 2.

The two pendulum part masses 5a and 5b of each centrifugal pendulum 4 are connected to each other with a plurality of connecting bolts 6 which are arranged distributed over the pendulum masses 4. Since the pendulum masses 4 are arranged displaceably relative to the carrier disk 2 both in the circumferential direction and in the radial direction along a slotted guide, cut-outs 7 are respectively made in the carrier disk 2 in which the connecting bolts 6 are arranged with play relative to the carrier disk 2. Some or all of the connecting pins 6 are provided with sleeves 12, see Fig. 3, which are made for example of rubber or the like, to dampen striking of the connecting pin 6 in the cutouts 7 in approach or exit or at low speeds.

In slots 8 in the pendulum part masses 5a, 5b and in slots 9 in the support plate 2 rollers 10 are arranged. The rollers 10 are rotationally symmetrical body see with a central axis M. The rollers 10 in conjunction with the slots 8 in the pendulum sub-masses 5a, 5b and the slots 9 in the support plate 2 a slotted guide for each pendulum mass 4, the movement of the pendulum mass 4 allow along predetermined paths relative to the support plate 2. The raceways of the rollers 10 relative to the support plate 2 and the Pendulum masses 4 are designed so that the center of gravity of the pendulum mass 4 ideally moves on a circular path with a radius I, wherein the radius I of the circular path has a distance e to the axis of rotation R. The movement can correspond to a parallel pendulum or a trapezoidal pendulum. This movement generates a variable distance of the center of gravity from the axis of rotation R. The square root from the ratio e to radius I is a measure of the natural circular frequency of the centrifugal pendulum relative to the angular frequency of the rotation about the axis of rotation R. The natural angular frequency or absorber frequency of the centrifugal pendulum is therefore proportional to the speed of the centrifugal pendulum device. When tuned close or directly to the main exciter arrangement of the drive train, the oscillation amplitude is reduced over the entire speed range.

Fig. 2 shows the detail of Fig. 2 without the pendulum part mass 5b. As a result, the view is free on a sliding element 1 1 b, which is arranged between the carrier plate 2 and pendulum part mass 5b. Correspondingly, a sliding element 1 1 b is arranged between the carrier plate 2 and the pendulum sub-segment 5a.

Fig. 3 shows the section I - I in Fig. 1st The sliding elements 1 1 a and 1 1 b are arranged flat on the axial surfaces of the support plate 2, so that the pendulum part masses 5a, 5b can not start directly on the support plate 2, but can come into contact with the respective sliding element 1 1. The sliding elements 1 1 a and 1 1 b are glued in the embodiment of FIG. 3 on the support plate 2. Between the pendulum sub-masses 5a, 5b facing surfaces of the respective sliding elements 1 1 a, 1 1 b and the pendulum sub-masses 5a, 5b remains in each case a gap 13a, 13 b. The sliding elements 1 1 a, 1 1 b may also be molded or attached by means of a clip connection to the support plate 2. Fig. 2 shows a plan view of the sliding member 1 1 b. In the illustration of FIG. 2, therefore, the pendulum part mass 5b is removed. As can be seen, corresponds to the contour of the sliding element 1 1 b substantially the contour of the pendulum part mass 5b and covers the sliding element 1 1 b practically completely. The sliding elements 1 1 cover part of the elongated holes 9 introduced into the carrier disk 2. The rollers 10 comprise cylindrical roller bodies 14a and 14b with small diameters which are arranged essentially in the slots 8 in the pendulum part masses 5a, 5b and on the latter Rolling or sliding surface, and a roller body 15 with a large diameter. The roller body 15 with a large diameter rolls or slides on the inner contour of the elongated hole 9 in the carrier disc 2 from. The sliding elements 1 1 a, 1 1 b form, as can be seen in Fig. 3, an axial stop and an axial guide for the roller body 15 and thus for the rollers 10th

Fig. 4 shows a section like that of Fig. 3 by an alternative embodiment of the invention. In the embodiment of Fig. 4, the sliding elements 1 1 a, 1 1 b are not attached to the support plate 2 but to the pendulum part masses 5a, 5b. It is thus, so to speak, the geometric reversal of the arrangement of the sliding elements 1 1 a, 1 1 b compared with the embodiment of FIG. 3rd

FIG. 5 shows a pendulum part mass 5 with sliding element 11 arranged thereon. As can be seen, the corresponding to the slots 9 and the holes for receiving the connecting pin 6 holes 18 and slots 20 are designed so that each edge 16 remains around the respective holes 18 and slots 20 around, not by the Sliding element 1 1 is covered. The connecting bolts 6 are stepped bolts and include outer cylindrical portions 16 a, 16 b having a smaller diameter and an inner cylindrical portion 17 having a larger diameter. The diameters of the bores 18 introduced into the sliding element 1 1 in the area of bores 19 in the pendulum part mass 5 for receiving the bolts 6 correspond in each case to the outer diameter of the inner cylindrical area 17. As can be seen in FIG. 4, the area 17 is large Diameter of the bolt 6 on the inner contour of the bores 18 of the sliding elements 1 1 a, 1 1 b. As a result, the bolts 6 are part of the attachment of the sliding elements 1 1 a, 1 1 b and form for this a positive stop in the plane of rotation.

Centrifugal pendulum device

carrier disc

drilling

centrifugal pendulum

a, 5b pendulum part masses

connecting bolts

cutouts

Slot in the pendulum part mass

Slot in the carrier disc

0 roller

1 a, 1 1 b sliding element

2 cuff

3a, 13b gap

4a, 14b small diameter reel body

5 roll body with a large diameter

6a, 16b areas of the bolt 6

7 area of bolts 6 with large diameter

8 bore in sliding element 1 1 for receiving a bolt 6 9 bore in pendulum part mass 5 for receiving a bolt 60 slot in sliding element 1 1

Claims

claims

1 . Centrifugal pendulum device (1) for arrangement in the drive train of a motor vehicle, with at least one pendulum mass (4, 5a, 5b), which is arranged on at least one carrier disc (2) and along a predetermined pendulum track can perform a relative movement to the carrier disc (2) in that at least one of the pendulum masses (4, 5a, 5b) and one of the carrier disks (2) has a flat sliding element (11a, 11b) arranged thereon.

2. centrifugal pendulum device according to claim 1, characterized in that the sliding element (1 1 a, 1 1 b) covers the majority of the carrier disc (2) facing surface of the pendulum mass (4, 5 a, 5 b).

3. centrifugal pendulum device according to claim 1 or 2, characterized in that the sliding element (1 1 a, 1 1 b) the carrier disc (2) facing surface of the pendulum mass (4, 5 a, 5 b) almost completely covered.

4. centrifugal pendulum device according to one of the preceding claims, characterized in that the sliding element (1 1 a, 1 1 b) on the pendulum mass (4, 5 a, 5 b) is fixed.

5. centrifugal pendulum device according to one of claims 1 to 3, characterized in that the sliding element (1 1 a, 1 1 b) is fixed to the carrier disc (2).

6. centrifugal pendulum device according to one of claims 4 or 5, characterized in that the sliding element (1 1 a, 1 1 b) on the carrier disc (2) or the pendulum mass (4, 5 a, 5 b) is glued.

7. centrifugal pendulum device according to any one of claims 4 or 5, characterized in that the sliding element (1 1 a, 1 1 b) on the support plate (2) or the pendulum mass (4, 5a, 5b) is sprayed.

Centrifugal pendulum device according to one of claims 4 or 5, characterized in that the sliding element (1 1 a, 1 1 b) with the carrier disc (2) or the pendulum mass (4, 5a, 5b) is connected by means of a clip connection.

Centrifugal pendulum device according to one of claims 4 or 6 to 8 with back cover to claim 4, characterized in that the sliding element (1 1 a, 1 1 b) and the pendulum mass (4, 5 a, 5 b) bores for receiving cylindrical stepped bolts ( 6), wherein the bores (18) in the sliding element (1 1 a, 1 1 b) have a larger diameter than the bores (19) in the pendulum mass (4, 5 a, 5 b) and so for fixing the sliding element (1 1 a, 1 1 b) relative to the pendulum mass (4, 5a, 5b) contribute.

Centrifugal pendulum device according to one of the preceding claims, characterized in that a flat sliding element is arranged between all pendulum masses (4, 5a, 5b) and all carrier discs (2).