centrifugal pendulum device

Abstract

Centrifugal pendulum device (1) for arrangement in the drive train of a motor vehicle, with at least one pendulum mass (4) which is arranged on a pendulum flange (2) and can perform a relative movement to the pendulum flange (2) along a predetermined pendulum path, wherein the pendulum mass comprises an intermediate piece (7) which is provided on both sides with a pendulum mass plate and a spacer plate arranged between the pendulum mass plate and the intermediate piece, and wherein the intermediate piece (7) is mounted on rolling elements (14, 15) which can roll on track sections (10, 11) of a recess (9) of the pendulum flange (2) and on track sections (12, 13) of the intermediate piece (7), characterized in that the spacer plates (21, 22) and / or the rolling elements (14, 15) comprise means for guiding the rolling elements (14, 15).

Description

The invention relates to a centrifugal pendulum device for arrangement in the drive train of a motor vehicle according to the preamble of claim 1. In a so-called U-pendulum, a centrifugal pendulum device in the drivetrain of motor vehicles, roller catch tracks ensure that the rolling element cannot leave its working area when the combustion engine is started or stopped. This reliably prevents the pendulum mass from jamming due to a roller leaving its working area. Roller catch tracks are described, for example, in DE102018115801 A1. In prior art solutions, the roller catch tracks are arranged in the pendulum mass plates. A cutout is made in the pendulum mass plates, following the path of the roller pin during the pendulum movement. These cutouts in the pendulum mass plates result in a reduction of the pendulum mass relevant to insulation. One object of the invention is therefore to avoid the reduction of the isolation-relevant pendulum mass. This problem is solved by a centrifugal pendulum device according to claim 1. Preferred embodiments, configurations, or further developments of the invention are specified in the dependent claims. The problem mentioned above is solved in particular by a centrifugal pendulum device for arrangement in the drive train of a motor vehicle, with at least one pendulum mass which is arranged on a pendulum flange and which can perform a relative movement to the pendulum flange along a predetermined pendulum path, wherein the pendulum mass comprises an intermediate piece which is provided on both sides with a pendulum mass plate and a spacer plate arranged between the pendulum mass plate and the intermediate piece, and wherein the intermediate piece is mounted on rolling elements which can roll on track sections of a recess of the pendulum flange as well as on track sections of the intermediate piece, wherein the spacer plates and / or the rolling elements comprise means for guiding the rolling elements. In one embodiment of the invention, the means for guiding the rolling elements are tracks in the spacer plates into which pins on the rolling elements project. The tracks are formed in the spacer plates in the manner of elongated slots. This means that the rolling elements are guided only by the spacer plates, thus avoiding a metal-to-metal contact with elongated slots in the pendulum mass plates as is common in the prior art. In a further embodiment of the invention, the means for guiding the rolling elements are tracks in the spacer plates into which the rolling elements project. The tracks are preferably grooves in the spacer plates whose depth is less than the thickness of the spacer plates. This prevents the rolling elements from coming into contact with the pendulum mass plates. In a further embodiment of the invention, the means for guiding the rolling elements are tracks in the spacer plates into which the end caps of the rolling elements project. The end caps are preferably made of plastic. When the rolling elements axially contact the pendulum mass plates, the end caps come into contact with the pendulum mass plates, without any metal-to-metal contact occurring. In one embodiment of the invention, the end caps have pins that project into bores in the rolling elements. In one embodiment, the pins are pressed into the bores of the rolling elements. They are fastened by a clip-type connection, in which the pins are held in the bores by friction and / or a positive fit. Such end caps can be easily manufactured as injection-molded components and are The tracks are preferably openings in the spacer plates. In one embodiment of the invention, the intermediate piece is riveted to the pendulum mass plates and the intermediate pieces. In another embodiment of the invention, the intermediate piece is provided with a stop element. Exemplary embodiments of the invention are explained in more detail below with reference to the accompanying drawings. These show: Fig. 1 parts of a first exemplary embodiment of a centrifugal pendulum device according to the invention in an exploded view, Fig. 2 details of the rolling element bearing in the exemplary embodiment of Fig. 1 in a partial section, Fig. 3 parts of a second exemplary embodiment of a centrifugal pendulum device according to the invention in an exploded view, Fig. 4 details of the rolling element bearing in the exemplary embodiment of Fig. 3 in a partial section, Fig. 5 parts of a third exemplary embodiment of a centrifugal pendulum device according to the invention in an exploded view, Fig. 6 details of the rolling element bearing in the exemplary embodiment of Fig. 5 in a partial section. Fig. 1 shows parts of an embodiment of a centrifugal pendulum device 1 according to the invention in an exploded view. The centrifugal pendulum device 1 is essentially rotationally symmetrical about an axis of rotation R. In the following, the circumferential direction is understood to mean a rotation about the axis of rotation R, the axial direction the direction parallel to the axis of rotation R, and the radial direction any direction perpendicular to the axis of rotation R. The centrifugal pendulum device can, for example, be arranged on a crankshaft of an internal combustion engine. The centrifugal pendulum device 1 comprises a pendulum flange 2, which can be screwed to the crankshaft or other torque transmission devices by means of bores 3. Several pendulum masses 4, in the present embodiment two, are arranged as centrifugal pendulums distributed around the circumference of the centrifugal pendulum device 1.The pendulum masses 4 each comprise a first or motor-side pendulum mass plate 5 and a second or gearbox-side pendulum mass plate 6. The terms motor-side and gearbox-side are used here solely for ease of differentiation and to facilitate understanding of the device and the arrangement of its parts. The first pendulum mass plate 5 and the second pendulum mass plate 6 are arranged on either side of the pendulum flange 2 and are rigidly connected to each other. An intermediate piece 7 is arranged between the pendulum mass plates 5 and 6, and is received in a recess 9 of the pendulum flange 2. The pendulum mass plates 5 and 6 are arranged axially on both sides of the pendulum flange 2. The first pendulum mass plate 5, the second pendulum mass plate 6, and the intermediate piece 7 are firmly connected to one another by several rivets 8, in this exemplary embodiment three. The recess 9 has a circumferential rim with two web sections 10, 11. These are arranged radially on the outside of the recess 9 and are each curved and concave. The intermediate piece 7 has two web sections 12, 13. These are arranged radially on the outside of the intermediate piece 7 and are each curved and concave. The intermediate piece 7 is smaller than the recess 9, so that the intermediate piece 7 can be displaced within the recess 9 to a limited extent. For the displaceable arrangement of the pendulum mass 4 on the 2, the centrifugal pendulum device 1 has rolling elements 14, 15. The rolling elements 14, 15 are arranged between the intermediate piece 7 and the pendulum flange 2. Under centrifugal force in the operating position, the intermediate piece 7 with its track sections 12, 13 is guided on the rolling elements 14, 15, which in turn roll on the track sections 10, 11 of the recess 9. Thus, under the influence of torsional vibrations, the pendulum mass 4 can be displaced from a central position along a pendulum path between two end positions in order to eliminate torsional vibrations. Spacer plates 21 and 22 are arranged on the inside of the pendulum mass plates 5 and 6. These can be riveted between the intermediate piece and the respective pendulum mass plate 5 or 6 using rivet bolts 9, or attached by means of plastic clip connections or the like. The intermediate piece 7 is provided on both sides with a stop element 20 made of rubber or the like, which serves as an end stop for the pendulum movement and impacts the recess. In the embodiment shown in Figs. 1 and 2, the rolling elements 14, 15 each have protruding guide pins 16, 17 on both end faces, which project into elongated holes 18, 19 in the spacer plates 21, 22. The axial length of the guide pins is less than the thickness of the spacer plates 21, 22, so that the pendulum mass plates 5, 6 are not contacted by the guide pins 16, 17. In the embodiment shown in Figs. 3 and 4, the rolling elements 14, 15 are axially extended, so that their axial length L is greater than the thickness d of the intermediate piece 7. In the spacer plates 21, 22, arcuate grooves 23, 24 are arranged instead of elongated holes, the depth t of which is less than the thickness b of the spacer plates 21, 22. In the embodiment shown in Figures 5 and 6, the rolling elements 14, 15 are provided with plastic end caps 25, 26. These caps have pins 27, 28 that project into bores 29, 30 on the end faces of the rolling elements 14, 15 and are frictionally or positively engaged in them, similar to a clip connection. When the rolling elements 14, 15 start moving, the plastic end caps 25, 26 contact the metallic pendulum mass plates 5, 6. Reference symbol list 1 Centrifugal pendulum device 2 Pendulum flange 3 Bore 4 Pendulum mass 5 Pendulum mass plate 6 Pendulum mass plate 7 Intermediate piece 8 Rivet bolt 9 Recess 10 Track section 11 Track section 12 Track section 13 Track section 14 Rolling element 15 Rolling element 16 Guide bolt 17 Guide bolt 18 Slotted hole 19 Slotted hole 20 Stop elements 21 Spacer plate 22 Spacer plate 23 Groove 24 Groove 25 End cap 26 End cap 27 Pin 28 Pin 29 Bore 30 Bore QUOTES INCLUDED IN THE DESCRIPTION This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature DE 102018115801 A1

[0002]

Claims

Centrifugal pendulum device (1) for arrangement in the drive train of a motor vehicle, with at least one pendulum mass (4) which is arranged on a pendulum flange (2) and can perform a relative movement to the pendulum flange (2) along a predetermined pendulum path, wherein the pendulum mass comprises an intermediate piece (7) which is provided on both sides with a pendulum mass plate and a spacer plate arranged between the pendulum mass plate and the intermediate piece, and wherein the intermediate piece (7) is mounted on rolling elements (14, 15) which can roll on track sections (10, 11) of a recess (9) of the pendulum flange (2) and on track sections (12, 13) of the intermediate piece (7), characterized in that the spacer plates (21, 22) and / or the rolling elements (14, 15) comprise means for guiding the rolling elements (14, 15). Centrifugal pendulum device according to claim 1, characterized in that the means for guiding the rolling elements (14, 15) are tracks in the spacer plates (21, 22) into which pins (27, 28) on the rolling elements (14, 15) project. Centrifugal pendulum device according to claim 1, characterized in that the means for guiding the rolling elements (14, 15) are tracks (18, 19) in the spacer plates (21, 22) into which the rolling elements (14, 15) project. Centrifugal pendulum device according to claim 3, characterized in that the tracks are grooves in the spacer plates (21, 22) whose depth is less than the thickness of the spacer plates (21, 22). Centrifugal pendulum device according to claim 1, characterized in that the means for guiding the rolling elements (14, 15) are tracks in the spacer plates, projecting into the end caps (25, 26) of the rolling elements (14, 15). Centrifugal pendulum device according to claim 5, characterized in that the end caps (25, 26) have pins (27, 28) which project into bores (29, 30) of the rolling elements (14, 15). Centrifugal pendulum device according to claim 6, characterized in that the pins (27, 28) are pressed into the bores (29, 30) of the rolling elements (14, 15). Centrifugal pendulum device according to claim 6, characterized in that the tracks (18, 19) are openings in the spacer plates (21, 22). Centrifugal pendulum device according to one of the preceding claims, characterized in that the intermediate piece (7) is riveted to the pendulum mass plates (5, 6) and the intermediate piece (7). Centrifugal pendulum device according to one of the preceding claims, characterized in that the intermediate piece (7) is provided with a stop body (20).

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