WO2015014359A1

WO2015014359A1 - Centrifugal force pendulum

Info

Publication number: WO2015014359A1
Application number: PCT/DE2014/200318
Authority: WO
Inventors: Thorsten Krause; Daniel Jegan; Peter Wahl
Original assignee: Schaeffler Technologies Gmbh & Co. Kg
Priority date: 2013-07-31
Filing date: 2014-07-14
Publication date: 2015-02-05
Also published as: DE102014213617A1; DE112014003488A5

Abstract

The invention relates to a centrifugal force pendulum (10) having at least one pendulum mass (35) and a pendulum flange (25), said pendulum mass (35) being arranged on the pendulum flange (25), at least one guiding means (45) being provided which is designed to guide the pendulum mass (35) on the pendulum flange (25) in a pendulum movement, and the pendulum flange (25) comprising at least one retaining mechanism (65) which is designed to secure the pendulum mass (35) to the pendulum flange (25) and to at least partially prevent a pendulum movement of the pendulum mass (35).

Description

centrifugal pendulum

The invention relates to a centrifugal pendulum with at least one pendulum mass and a pendulum, wherein the pendulum mass is arranged on the pendulum, wherein at least one guide means is provided, which is designed to guide the pendulum mass in a pendulum motion on the pendulum.

From DE 10 201 1 013 232 A1 a centrifugal pendulum with a pendulum and a pendulum on both sides of the pendulum by means of recorded in an arcuate section of the pendulum flange spacer bolt pendulum masses is known, wherein a movement of the pendulum mass is limited by means of a stop. The spacer bolt in this case has a damping arrangement which comprises a damping element and a ring which comprises the damping element. The ring is designed to strike against a cutout contour of the cutout. Due to the metallic material combination of ring and pendulum flange, the striking of the ring on the cutout contour of the pendulum flange leads to a clearly perceptible noise, furthermore metal particles can detach from the ring and / or pendulum flange.

It is an object of the invention to provide an improved centrifugal pendulum, which has an improved noise behavior, especially at low speeds.

According to the invention it was recognized that an improved centrifugal pendulum thereby

can be provided that the centrifugal pendulum comprises at least one pendulum mass and a pendulum, wherein the pendulum mass is arranged on the pendulum, wherein at least one guide means is provided which is adapted to guide the pendulum mass in a pendulum motion on the pendulum, wherein the pendulum flange at least comprises a holding device which is designed to fix the pendulum mass to the pendulum and at least partially to prevent a pendulum movement of the pendulum mass.

In this way, it is ensured that the pendulum mass is blocked by the holding device in its pendulum action and thus at low speeds, the striking of the spacer bolt on a cutting contour in the pendulum and thus a corresponding noise is avoided. Thus, the centrifugal pendulum is quieter overall, so that the ride comfort is increased in a motor vehicle with such a centrifugal pendulum. In a further embodiment, the holding device has a limiting speed, wherein below the limit speed, the holding device fixes the pendulum masses on the pendulum and repeals the fixing of the pendulum masses when the limit speed is exceeded and releases a movement of the pendulum masses. In this way, the impact of the pendulum masses below the limit speed can be avoided and thus the noise behavior of the centrifugal pendulum can be improved.

In a further embodiment, the holding device is arranged at least partially between the pendulum flange and the spacer bolt. In this way, a particularly compact centrifugal pendulum can be provided

In a further embodiment, a cutout is provided in the pendulum mass and / or in the pendulum flange, wherein the cutout is at least partially arcuate and wherein the holding device is arranged in the circumferential direction in the central position of the cutout. In this way, the spacer bolt can be particularly well fixed by the holding device at low speeds.

In a further embodiment, the holding device comprises at least one web which is connected to the pendulum flange with a fixed end and wherein a holding surface is provided at a free end of the web, wherein the holding surface is shaped such that the holding surface a movement of the spacer pin in the circumferential direction at least partially blocked. In this way, a holding device is provided which can be produced inexpensively in a simple manner, for example by means of a stamping method together with the pendulum flange.

In a further embodiment, the holding device has a bracing device, wherein the bracing device braces the spacing bolt with the pendulum flange in the radial direction. In this way, a particularly good fixation of the spacer bolt and thus a good blocking of the pendulum motion is achieved at low speeds.

In a further embodiment, the bracing device has at least one pressing element. The holding surface is preferably formed at least partially corresponding to the pressing member. This embodiment ensures easy blocking in the circumferential direction and prevents pendulum movement of the pendulum masses despite tension by the holding device. In a further embodiment, the tensioning device comprises a spring element. The spring element is arranged at least partially between the contact pressure element and the spacing bolt. The spring element is designed to press the pressing element against the holding surface in order to at least partially block a pendulum movement of the pendulum masses in the circumferential direction of the oscillating flange.

In a further embodiment, the bracing device comprises a guide element. The guide element is connected at its first longitudinal end with the contact pressure element. The pressing element is preferably arranged transversely to the guide element. In this way, a simple guidance of the pressing element can be ensured when releasing the holding device.

In a further embodiment, the spacing bolt comprises an opening formed corresponding to the guide element, wherein the opening at least partially receives the guide element. In this way, a simple guide can be ensured by the spacer bolt.

In a further embodiment, the holding device comprises an additional mass, which is connected to the pressing element. In this way, it is ensured that even with a high spring force of the spring element for pressing the contact pressure on the support surface, a sufficiently strong counterforce to the contact pressure can be provided even at low speeds to solve the holding device at low speeds.

In a further embodiment, the additional mass is arranged at a second longitudinal end of the guide element and connected to the guide element. The spacing bolt is arranged between the additional mass and the pressing element. As a result, a particularly good and mechanically stable coupling between the additional mass and the pressing element can be provided.

In a further embodiment, the spring element is an annular spring or a

Radial wave spring or a spiral spring or a leaf spring. Alternatively, the spring element is annular and surrounds the spacer bolt or the guide element at least partially circumferentially. These embodiments have proven to be particularly low maintenance. The invention will be explained in more detail with reference to figures. The same components are designated by the same reference numerals. Showing:

1 is a perspective view of a centrifugal pendulum in a first operating state in a first embodiment.

FIG. 2 shows a longitudinal section through the centrifugal pendulum shown in FIG. 1; FIG.

3 shows a cross section through the centrifugal pendulum shown in Figures 1 and 2.

FIG. 4 shows a cross section through a spacer bolt of the centrifugal pendulum pendulum shown in FIGS. 1 to 3 in the first operating state of the centrifugal pendulum pendulum; FIG.

5 shows a cross section through the spacing bolt shown in FIGS. 1 to 3 in a second operating state of the centrifugal pendulum pendulum;

FIG. 6 is a perspective view of the centrifugal pendulum shown in FIGS. 1 to 3 in a second operating condition; FIG.

FIG. 7 shows a cross section through the centrifugal pendulum shown in FIG. 6; FIG.

FIG. 8 shows a cross section through the centrifugal pendulum shown in FIGS. 6 and 7 in a second position of the spacer bolt; FIG.

9 is a perspective view of the centrifugal pendulum shown in Figures 1 to 8 in a second embodiment.

FIG. 10 shows a cross section through the centrifugal pendulum shown in FIG. 9; FIG.

1 1 is a perspective view of the centrifugal pendulum shown in Figures 1 to 8 in a third embodiment.

FIG. 12 shows a cross section through the centrifugal pendulum shown in FIG. 11; FIG. 13 is a detail of a plan view of a centrifugal pendulum according to a fourth

embodiment;

Fig. H is a partial perspective view of the centrifugal pendulum shown in Fig. 13;

Fig. 15 is an enlarged plan view of the centrifugal pendulum shown in Figs. 13 and 14;

FIG. 16 shows a detail of a plan view of the centrifugal pendulum shown in FIG. 13 in a second operating state; FIG.

Fig. 17 is an enlarged view of the plan view shown in Fig. 16;

FIG. 18 is a partial perspective view of that shown in FIGS. 16 and 17. FIG

Centrifugal pendulum;

FIG. 19 is a perspective view of the centrifugal pendulum shown in FIGS. 16 to 18; FIG.

Fig. 20 is a partially transparent view of the centrifugal pendulum shown in Fig. 19;

FIG. 21 is a plan view of a centrifugal pendulum according to a fifth embodiment; FIG.

Figures 22 and 23 are perspective views of the centrifugal pendulum shown in Figure 21 in the first operating state.

Fig. 24 is a plan view of the centrifugal pendulum shown in Fig. 21 in a second

Operating condition; and

Fig. 25 is a perspective view of the centrifugal pendulum shown in Fig. 24.

1 shows a perspective view of a centrifugal pendulum 10 of a first embodiment in a first operating state. 1 shows a cross section through the centrifugal pendulum 10 shown in FIGS. 1 and 2. FIG. 4 shows a cross section through a spacer pin 15 of the centrifugal pendulum pendulum 10 in the first operating state 5 shows a cross section through the spacing bolt 15 shown in FIGS. 1 to 3 in a second embodiment. th operating state. 6 shows a perspective view of the centrifugal force pendulum 10 in a second operating state, and FIG. 7 shows a cross section through the centrifugal pendulum 10 shown in FIG. 6. FIG. 8 shows a cross section through the centrifugal pendulum shown in FIGS. 1 to 7 at an instant of impact , Hereinafter, FIGS. 1 to 8 will be explained together. The same components are designated by the same reference numerals.

The centrifugal pendulum 10 comprises an axis of rotation 20 about which the centrifugal pendulum 10 is rotatable. The centrifugal pendulum 10 comprises a pendulum flange 25 on which two pendulum masses 30, 35 are arranged on both sides. For a clearer illustration, in Figures 1 and 6 to the first pendulum mass 30 shown, which is shown on the back in Figures 1 and 6, the second pendulum mass 35 indicated only by dashed lines. The pendulum masses 30, 35 are connected by a plurality of spacers 15. The pendulum masses 30, 35, which are thus arranged in pairs on both sides of the pendulum flange 25, perform with a fluctuating torque introduction into the pendulum flange 25 a temporal Nachhinkende pendulum motion in the circumferential direction and thereby compensate for the torque introduced at least. In the pendulum motion, the pendulum masses 30, 35 are guided by spherical rollers 45. For guidance, a respective recess 51 in the pendulum masses 30, 35 and a first cutout 50 in the pendulum flange 25 are provided as guide means, which is arranged overlapping the recesses 51. The first cutout 50 has a kidney-shaped configuration. The pendulum roller 45 extends through the first cutout 50 and the two recesses 51. The pendulum masses 30, 35 are thereby guided by the pendulum roller 45 as a function of the contours of the first cutout 50 and the recess 51.

Furthermore, the pendulum flange 25 has a second cutout 55, through which the

Distance bolt 15 is guided. The second cutout 55 is open radially outward and has an exemplary butterfly-shaped cut-out contour 60. Of course, it is also conceivable that the cutout contour 60 of the second cutout 55 is formed differently. Also, the second cutout 55 may be closed radially outward.

Furthermore, the centrifugal pendulum 10 comprises a holding device 65 which is designed to fix the spacing bolt 15 in a defined position in a first operating state, as shown in FIGS. 1 to 4, in order to prevent oscillation of the pendulum masses 30, 35. The holding device 65 comprises a web 70 which is connected to the pendulum flange 25 with a fixed end 75. At a free end 80 of the web 70, a recess 85 is arranged as a holding surface. The recess 85 is formed partially circular. Of course, the indentation 85 may be formed as a holding surface and geometrically different. So For example, it is conceivable that the holding surface is flat and thus rectilinear. Essential in the geometric design of the holding surface is that the holding surface (in a continuation 89) intersects a movement curve 88 of the spacer bolt 15. The holding device 65 further comprises a bracing device 86, which is partially disposed between the spacer pin 15 and the pendulum flange 25, and braces the spacer pin 15 with the pendulum flange on the web 70 in the first operating state. Directly to the web 70, a partial section 87 adjoins the cutout contour 60. The section 87 is arranged radially inwardly of the indentation 85.

The spacing bolt 15 comprises a longitudinal axis 95, which is aligned parallel to the axis of rotation 20 of the centrifugal pendulum 10. The spacer bolt 15 is cylindrical. The spacer bolt 15 has at the two longitudinal ends in each case a fastening portion 105. The mounting portions 105 engage in openings 1 10 of the pendulum masses 30, 35 and are positively connected to the pendulum masses 30, 35 at the respective longitudinal end. Between the two fastening portions 105, a wider than the fastening portions 105 formed spacing portion 1 15 is provided. The spacing section 15 is cylindrical in this case. On an outer peripheral surface of the Beabstan- dungsabschnitts 1 15, the clamping element 86 is arranged. The bracing device 86 comprises a spring element 125 and a ring element 130 designed as a pressing element. The spring element 125 is arranged between the ring element 130 and the spacing section 15. The spring element 125 is annular in an unloaded state and has a viscoelastic material.

In a first operating state, as shown in Figures 1 to 4, the centrifugal pendulum 10 is or rotates at a low speed below a predefined depending on the design of the Fiehkraft- pendulum 10 speed limit n_Grenz. The limit speed n_limit can be, for example, 1000 revolutions per minute. Alternatively, n_limit can be 800 revolutions per minute or 600 revolutions per minute. Of course, other limit speeds n_limit are also conceivable. In the first operating state, the spring element 125 presses the ring element 130 into the indentation 85 and thus braces the spacing bolt 15 with respect to the pendulum flange 25. The indentation 85 is formed corresponding to an outer circumferential surface 90 of the ring element 130. By the spring element 125, a contact force F _{A is} provided, with which the ring element 130 is pressed into the recess 85. Due to the part-circular configuration of the recess 85 is an additional force necessary for a pendulum movement of the pendulum masses 30, 35 in the circumferential direction, through which the spring element 125 additionally braced and rolling out of the ring member 130 is additionally prevented from the recess. By fixing the pendulum masses 30, 35 striking the spacer bolt 15 at low speeds below the limit speed n_Grenz on the cutout contour 60 is avoided. As a result, overall the noise behavior of the centrifugal pendulum 10 can be improved.

With a rotation of the centrifugal force pendulum 10 about the axis of rotation 20 acts on the ring member 130 and the spring member 125, a centrifugal force F _F radially outward. The pendulum masses 30, 35 are in a central position and can not be moved further in the circumferential direction in their radially outermost position due to the geometric configuration of the first cutout 50 and the recesses 51 in the embodiment. When the limit rotational speed n_limit is exceeded, the centrifugal force F _F releases the contact force F _{A of} the spring element 125, so that the ring element 130 loses contact with the recess 85 as the rotational speed increases, thus lifting the ring element 130 away from the indentation 85. In this case, the ring element goes from a centric arrangement to the longitudinal axis 95 of the spacer bolt 15 in an eccentric arrangement over. If the centrifugal force F _{F is} greater than the contact pressure F _A , the distance bolt 15 is no longer fixed by the holding device 65 and the pendulum masses 30, 35 are then released in their movement in the circumferential direction. As a result, the pendulum masses 30, 35 perform their usual pendulum motion performed by the spherical rollers 45 to compensate for torque fluctuations of an internal combustion engine connected to the centrifugal pendulum 10.

Further, the tensioning device 86, even at high torque fluctuations, a bouncing, as shown in Fig. 8, of the ring member 130 on the cutting contour 60 effectively cushion by lateral deflection of the spring member 125 and thus effectively reduce the operating noise of the centrifugal pendulum 10 even at a striking.

The spring element 125 is designed annular in the embodiment and has a viscoelastic material. Of course, other elastic materials or other types of geometric shapes for the spring element 125 are conceivable. The ring member 130 is formed as a closed ring. The ring member 130 has a spring steel as a material. Of course, other materials are conceivable. It is essential, however, that the ring element 130 has sufficient mass to cancel the contact force F _A with the centrifugal force F _F acting on the ring element 130 at a predefined limit speed n_limit. 9 shows a perspective view of a centrifugal pendulum 200 in a second

Embodiment. Fig. 10 shows a cross section through the centrifugal pendulum shown in Fig. 9. The centrifugal pendulum 200 is formed substantially identical to the centrifugal pendulum 10 shown in Figures 1 to 8.

Deviating from this, however, the bracing device 86 has a spring element 205, which is designed as a spiral spring. In this case, the spring element 205 provides the contact pressure F _A and presses the ring element 130 against the indentation 85 of the holding device 65. The mode of operation is identical to the holding device 65 shown in FIGS. 1 to 8, so that when the limit speed n_limit is exceeded the centrifugal force on the ring element 130 is greater than the contact pressure F _A , the spring element 205 is pressed radially outward and the spacer pin 15 can move freely in the second cutout 55.

Fig. 1 1 shows a perspective view of a centrifugal pendulum 300 in a third

Embodiment. FIG. 12 shows a cross section through the centrifugal pendulum 300 shown in FIG. 11. The centrifugal pendulum 300 is substantially identical to the centrifugal pendulum 10, 200 shown in FIGS. 1 to 10.

Notwithstanding, the bracing device 86 designed as a radial wave spring

Spring element 305 on. The spring element 305 may be formed either slotted or closed. The mode of operation of the holding device 65 corresponds to the mode of operation of the holding device 65 explained in FIGS. 1 to 10.

It should be noted that the holding device 65 may be arranged not only, as shown in the figures, centered in the second cutout 55, but also to the center. It is advantageous if the arrangement of the holding device 65 in the circumferential direction with the orientation of the spacer bolt 15 when the pendulum masses 30, 35 are in their radially outermost position, overlaps. As a result, tilting of the bracing device 86 is avoided.

Furthermore, the bracing element 86 can also be designed differently. In this case, an asymmetrical embodiment of the bracing device 86 to the longitudinal axis of the spacer bolt 15 is conceivable.

Furthermore, the web 80 can be varied both in its geometric configuration, as well as in a position on the pendulum flange 25. Also can on the indentation 85th and / or the web 70 are dispensed with. Alternatively, the indentation 85 may have a part-circular configuration other than that shown.

13 shows a detail of a plan view of a centrifugal pendulum 400 according to a fourth embodiment. 14 is a partial perspective view of the centrifugal pendulum 400 shown in FIG. 13. FIG. 15 is an enlarged plan view of the centrifugal pendulum 400 shown in FIGS. 13 and 14. FIG. 16 is a fragmentary plan view of the centrifugal pendulum 400 shown in FIGS. 13 shown centrifugal pendulum 400 in a second operating state. FIG. 17 is an enlarged view of the plan view shown in FIG. 16. FIG. FIG. 18 is a partial perspective view of the centrifugal pendulum 400 shown in FIGS. 16 and 17. FIG. 19 is a perspective view of the centrifugal pendulum 400 shown in FIGS. 16 to 18. FIG. 20 is a partial transparent view of that shown in FIG Centrifugal pendulum 400. Figures 13 to 20 will be explained together.

The centrifugal pendulum 400 is formed substantially similar to the centrifugal pendulum 10, 200 shown in Figures 1 to 12. Deviating from this, the holding device 65 has a different type of clamping device 405. The tensioning device 405 is arranged on a spacer bolt 410. The spacer bolt 410 includes a spacer portion 415 which is disposed between the two pendulum masses 30, 35 and the two pendulum masses 30, 35 spaced from each other. The spacing section 415 thus has at least one axial width of the pendulum flange 25. In the axial direction, two fastening sections 420 each extend away from the spacer section 415. The attachment portions 420 serve to fix the pendulum masses 30, 35 to the spacer portion 415. This can be done in particular by means of a riveted joint. The holding device 401 has an opening 425 in the spacing section 415 of the spacer bolts 410. The opening 425 extends radially from inside to outside and is exemplified as a through hole.

The bracing device 405 comprises a contact pressure element 430 and a guide element 435. The guide element 435 is designed as an example cylindrical and is connected to a first longitudinal end 440 with the contact pressure element 430. The pressing element 430 has an exemplary square cross-section. Furthermore, in the embodiment, the pressing element 430 extends over the entire axial width of the two pendulum masses 30, 35 and the pendulum flange 25. The contact pressure element 430 is arranged parallel to the axis of rotation 20. The guide member 435 and the pressing member 430 are thus T-shaped and arranged transversely to each other. Of course, another arrangement of the pressure elements 430 to the guide member 435 conceivable. At a second longitudinal end 445, the guide element 435 engages in the opening 425 of the spacer bolt 410 in the first operating state, that is to say when the rotational speed <n_definition. Between the contact pressure element 430 and the spacer bolt 410, the guide element 435 is surrounded on the circumference by a spring element 450. The spring element 450 is formed in the embodiment as a spiral spring. Of course, it is also conceivable that the spring element 450 is formed differently. The spring element 450 braces the contact pressure element 430 with respect to the spacer bolts 410. As a result, the contact pressure element 430 is pressed radially into the indentation 85 from the outside to the inside, the indentation 85 being formed in the pendulum flange 25 corresponding to the contact pressure element 430.

In order to prevent the pressing element 430 from rotating relative to the spacing bolt 410, the pendulum masses 30, 35 each have a guide opening 455. The guide outbreak 455 has two circumferentially located side surfaces 470, 475, which serve as guide surfaces 460, 465. The guide surfaces 460, 465 abut against the respectively facing side surfaces 470, 475 of the pressing element 430. The guide surfaces 460, 465 lead in a relative movement of the pressing member 430 relative to the spacer bolt 410, the pressing member 430 and ensure that the pressing member 430 is not twisted. In this way it is avoided that in a repeated fixing of the pendulum masses 30, 35 by the holding device 65, the pressing member 430 can not rotate.

At the web 70, the rectangular shaped indentation 85 is provided at the free end 80 of the web 70. The indentation 85 in this case has the cross section of the pressing element 430 facing it in order to be able to receive the contact pressure element 430 and to block a movement in the circumferential direction of the pendulum masses 30, 35 or of the contact pressure element 430 on the web 70. As an alternative to the shown rectangular configuration of the pressing element 430 or the recess 85, it is also conceivable that the pressing element 430 or the correspondingly formed recess 480 has a different cross-section. For example, it is conceivable that the pressing element 430 or the indentation 85 is circular, polygonal, elliptical or triangular.

In the first operating state at a rotational speed n below the limit rotational speed n_limit, the spring element 450 presses the pressing element 430 into the indentation 85. The guide element 435 has a radial extension in that, even in the pressed-in state of the abutment. press element 430 engages the registration 85 second longitudinal end 445 of the guide member 430 in the opening 425 of the spacer bolt 410. In this way, a stable determination of the pendulum masses 30, 35 will be ensured below the limit speed n_Grenz.

Due to the rectangular configuration of the contact pressure element 430, the contact pressure element 430 can have a particularly large mass. If the centrifugal force pendulum 400 rotates, the pressing element 430 generates an increased centrifugal force compared with the embodiment shown in FIGS. 1 to 12. This has the consequence that with the same spring strength of the spring element 450 to the embodiments shown in Figures 1 to 12, the holding device 401 opens at a lower limit speed n_Grenz and the blocking of the pendulum masses 30, 35 cancels.

However, it is the goal that the limit speed n_Grenz should be kept constant to the embodiments of centrifugal pendulums shown in Figures 1 to 12, so the spring element 450 can be made reinforced, so that the spring element 450 an increased contact force F _A for pressing the pressing member 430th into the indentation 480. In this way it is ensured that effective at lower speeds with high torque fluctuations, the release of the holding device 401 is avoided.

When the limit rotational speed n_limit in the second operating state is exceeded (see FIGS. 16 to 20), the centrifugal force F _F , which is greater than the spring force F _A provided by the spring element 450, acts on the guide element 435 and the pressing element 430. Thereby, the guide member 435 and the pressing member 430 are pressed radially outward. When the limit speed n_limit is exceeded, the centrifugal force F _{F is} so great that the spring element 450 is compressed so far that the contact pressure element 430 leaves the recess 85 completely radially outward. If at the same time a fluctuating torque is introduced into the pendulum flange 25, then the pendulum masses 30, 35 can perform their usual pendulum motion for damping the torque fluctuations.

In the embodiment, the indentation 85 is arranged at the free end of the web 70. Of course, it is also conceivable that the web 70 is dispensed with and the indentation 85 is integrated directly into the cutout contour 60 of the second cutout 55.

21 shows a plan view of a centrifugal pendulum 500 according to a fifth embodiment. FIGS. 22 and 23 show perspective views of the centrifugal force shown in FIG. pendel 500 in the first operating state. FIG. 24 shows a plan view of the centrifugal pendulum 500 shown in FIG. 21 in a second operating state, and FIG. 25 shows a perspective view of the centrifugal pendulum 500 shown in FIG.

The centrifugal pendulum 500 is constructed substantially identical to the centrifugal pendulum 400 formed in FIGS. 13 to 20. Deviating from this, the holding device 65 has a spring element 505 designed as a leaf spring. The spring element 505 has the same operation as described in Figures 13 to 20. The spring element 505 has two spring element parts 510, 515. In each case, a spring element part 510, 515, each arranged in a pendulum mass 30, 35. The spring element parts 510, 515 are formed symmetrically to the pendulum flange 25. In this case, the spring element part 510, 515 at the free ends 80 each have a contact portion 520, 525 on. Between the two abutment sections 520, 525, a spring portion 530 is arranged. The spring portion 530 is arcuate and extends in the direction of the pendulum flange 25. At the respective free ends of the spring element part 510, 515, a tab 535 is provided on the pendulum flange 25 side facing. The tab 535 extends radially outwardly and ensures that the spring element part 510, 515 can not slip out of the pendulum mass 30, 35 in the axial direction. The spring section 530 abuts the pressing element 430 radially on the outside and presses the pressing element 430 radially inwards.

In order to fix the spring element 505 in the pendulum masses 30, 35, a spring opening 540 is provided in each case in a pendulum mass 30, 35. The spring opening 540 goes over radially into the guide outbreak 455. Together, the guide cutout 455 and the guide opening 540 form a T-shaped opening in the pendulum masses 30, 35. The spring opening 540 extends substantially in the circumferential direction. It is arranged symmetrically to a radially outwardly extending movement axis 545 of the guide member 435. The spring opening 540 in this case has a wing-like configuration, wherein the spring opening 540 tapers away from the guide axis 545 in the circumferential direction. Thus, the spring opening 540 is formed on the guide shaft 545 in the radial direction wider than at the spaced from the guide axis 545 ends of the spring opening 540. In the region of the guide axis 545 of the spring portion 530 is arranged. Spaced in the circumferential direction of the guide axis 545, the contact portions 525, 520 are arranged in each case. Furthermore, the spring opening 540 has two radially inwardly projecting recesses 550, 555 on a radially outer side surface 560 arranged. The bulges 550, 555 are arranged approximately radially opposite to the guide surfaces 460, 465 of the guide aperture 455. The bulges 550, 555 serve to the spring element 505 to support reliably during compression. The protrusions 550, 555 are configured such that when the limit speed n_limit is exceeded during the transition from the first operating state to the second operating state and thus when the holding device 401 is released, the abutment sections 520, 525 lie flat against the side surface 560 and the protrusions 550, 555 so as to reliably support the F introduced into the spring element 505 via the spring section 530 and to prevent damage to the spring element 505.

Together, the guide cutout 455 and the guide opening (?) 540 form a table-shaped opening in the pendulum masses 30, 35.

In order to be able to lower the limit speed n_limit in addition to lower rotational speeds, an additional mass 560 is provided between the two pendulum masses 30, 35 radially on the outside at the second longitudinal end 445 of the guide element 435. The additional mass 560 has in the axial direction of a width which substantially corresponds to the width of the pendulum flange 25. In the radial direction, the additional mass 560 is bounded radially at least partially by the spacing bolt 410. Radially on the outside, the additional mass 560 is limited only by the space contours of the centrifugal pendulum 500. In the circumferential direction, the additional mass 560 extends in such a way that the additional mass 560 does not abut the pendulum flange 25 during a pendulum movement of the pendulum masses 30, 35 in the second operating state. The additional mass 560 has an opening 565 which is adapted to receive the second longitudinal end 445. In this case, for example, the additional mass 560 may be connected by means of a press connection with the second longitudinal end 445 of the guide element 535. Of course, it is also conceivable that the additional mass is connected differently with the second guide element 535. Thus, the spacing bolt is arranged radially between the pressing element 430 and the additional mass 560. By the additional mass 560, a centrifugal force F _F is provided even at very low speeds, which abolishes or is greater than the contact force F _{A of} the spring element 505 when exceeding the limit speed n_Grenz. As a result, the contact pressure element 530 is already pulled out of the indentation 85 at low rotational speeds and thus the locking between the pressing element 430 and the indentation 85 is released. This can be attenuated in the usual way by the centrifugal pendulum 500 at the fluctuating torque. In particular, by means of the additional mass 560, the limit speed n_limit, at which the holding device 65 releases the pendulum masses 30, 35, can be lowered further than described in FIGS. 1 to 12, for example to 400 revolutions per minute. Of course, a lowering of the limit speed n limit to another speed conceivable. In the embodiment, the guide member 435 with the pressing member 430 is integrally connected and of the same material. Of course, it is also conceivable that the pressing member 430 has an opening to receive the guide member 435. In this case, for example, the guide member 435 may be integrally connected and the same material with the additional mass 560. Of course, it is also conceivable that the pressing member 530, the guide member 535 and the additional mass 560 are formed in three parts and these are connected by means of a frictional connection.

It should be noted that the spring opening 540 and the guide opening 455 are formed by way of example. Of course, it is also conceivable that in the design of the pressing element 430 or the spring element 505, the spring opening 540 and the guide outbreak 455 are designed differently.

It is also conceivable that in the absence of the web 70, the holding surface 85 is integrated radially inside in the cut-out contour 60.

It is also conceivable that the spring element 125, the ring member 130 directly with the

Cleaved contour contour 60 and thus dispensed with the web 70 and the indentation 85, so that a particularly cost-producible centrifugal pendulum 10, 200, 300 can be provided.

In the embodiment, the oscillation of the pendulum masses 30, 35 is blocked exclusively by the holding means 65 provided on the central spacing bolt 15 of three provided spacing bolts 15. Of course, both the number of standoffs 15 and the arrangement of the holding device 65 in number and arrangement can be varied.

It is also conceivable that in the embodiments of the holding device 65 shown in FIGS. 1 to 20, the additional mass 560 is provided. The additional mass may be provided, for example, as a material reinforcement on the ring element 130 designed as a pressing element. List of accessories for centrifugal pendulum

Standoffs

axis of rotation

pendulum

First pendulum mass

Second pendulum mass

Spherical roller

First section

Recess of the pendulum mass Second cutout

Neck contour

holder

web

Fixed end

Free end

indentation

tensioning device

Part of the cutout contour

continuation

peripheral contour

Longitudinal axis of the spacer bolt attachment portion

opening

spacing portion

damping element

spring element

Ring element (contact pressure element) Centrifugal pendulum

Spring element centrifugal pendulum

tensioning device 410 spacer bolts

415 spacer section

420 fixing section

425 opening

430 pressing element

435 guide element

440 First longitudinal end

445 Second longitudinal end

450 spring element

455 leadership outbreak

460 First guiding surface

465 Second guide surface

470 First side surface

475 Second side surface

500 centrifugal pendulum

505 spring element

510 First spring element part

515 second spring element part

520 investment section

525 investment section

530 spring section

535 tab

540 spring opening

545 guide axis

550 bulge

555 bulge

560 additional mass

565 opening

Claims

Patent claims

Centrifugal pendulum (10; 200; 300; 400; 500) with at least one pendulum mass (30, 35) and a pendulum flange (25),

wherein the pendulum mass (30, 35) is arranged on the pendulum flange (25), at least one guide means (45, 50, 51) being provided which is designed to move the pendulum mass (30, 35) in a pendulum movement on the pendulum flange (25 ) respectively,

characterized in that

the pendulum flange (25) comprises at least one holding device (65) which is designed to fix the pendulum mass (30, 35) on the pendulum flange (25) and at least partially prevent a pendulum movement of the pendulum mass (30, 35).

Centrifugal pendulum (10; 200; 300; 400; 500) according to claim 1, characterized in that the holding device (65) has a limit speed (n_limit), the holding device (65) holding the pendulum masses (30, 35) below the limit speed (n_limit). ) is fixed to the pendulum flange (25) and when the limit speed (n_limit) is exceeded, the fixation of the pendulum masses (30, 35) is removed and the pendulum masses (30, 35) can move.

Centrifugal pendulum (10; 200; 300; 400; 500) according to claim 1 or 2, characterized in that the holding device (65) is at least partially arranged between the pendulum flange (25) and the spacer bolt (15, 410).

Centrifugal pendulum (10; 200; 300; 400; 500) according to one of claims 1 to 3, characterized in that a cutout (55) is provided in the pendulum mass (30, 35) and/or in the pendulum flange (25), whereby the cutout (55) is at least partially arcuate and the holding device (65) is arranged in the circumferential direction in the central position of the cutout (55).

Centrifugal pendulum (10; 200; 300; 400; 500) according to one of claims 1 to 4, characterized in that the holding device (65) comprises at least one web (70) which has a fixed end (75) with the pendulum flange (25 ) is connected, and wherein a holding surface (85) is provided at a free end (80) of the web (70), the holding surface (85) being shaped such that the holding surface (85) prevents movement of the spacer bolt (15, 410 )s at least partially blocked in the circumferential direction.

6. Centrifugal pendulum (10; 200; 300; 400; 500) according to claim 5, characterized in that the cutout (55) comprises a cutout contour (60) delimiting the cutout (55), one directly adjacent to the holding device (65). Partial section (87) of the cutout contour (60) is arranged radially on the inside of the holding device (65), in particular to the holding surface (85).

7. Centrifugal pendulum (10; 200; 300; 400; 500) according to one of claims 1 to 6, characterized in that the holding device (65) comprises a bracing device (86; 405), the bracing device (86; 405) holding the spacer bolt (15, 410) braced in the radial direction with the pendulum flange (25).

8. Centrifugal pendulum (10; 200; 300; 400; 500) according to claim 7, characterized in that the bracing device (86; 405) comprises at least one pressing element (130; 430), preferably the holding surface (85) at least partially corresponding to the Pressing element (130; 430) is formed.

9. Centrifugal pendulum (10; 200; 300; 400; 500) according to claim 7 or 8, characterized in that the bracing device (86; 405) comprises a spring element (125; 205; 450; 505), wherein the spring element (125; 205; 450; 505) is at least partially arranged between the pressing element (130; 430) and the spacer bolt (15, 410), wherein the spring element (125; 205; 450; 505) is formed, the pressing element (130; 430). to press the holding surface (85) in order to at least partially block a pendulum movement of the pendulum masses (30, 35) in the circumferential direction of the pendulum flange (25).

10. Centrifugal pendulum (400; 500) according to claim 8 or 9, characterized in that the clamping device (86; 405) comprises a guide element (435), the guide element (435) being connected at its first longitudinal end (440) to the pressing element (130 ; 430), wherein the pressing element (130; 430) is preferably arranged transversely to the guide element (435).

1 1 . Centrifugal pendulum (400; 500) according to claim 10, characterized in that the spacer bolt (410) has an opening (425) designed to correspond to the guide element (435), the opening (425) at least partially receiving the guide element (435).

12. Centrifugal pendulum (10; 200; 300; 400; 500) according to one of claims 1 to 1 1, characterized in that the holding device (65) comprises an additional mass (560) which is connected to the pressing element (130; 430). .

13. Centrifugal pendulum (500) according to claim 12, characterized in that the additional mass (560) is arranged at a second longitudinal end (445) of the guide element (435) and is connected to the guide element (435), with the spacer bolt (410) between the Additional mass (560) and the pressing element (430) is arranged.

14. Centrifugal pendulum (10; 200; 300; 400; 500) according to one of claims 10 to 13, characterized in that the spring element is an annular spring (205) or a radial wave spring (305) or a spiral spring (450) or a leaf spring (505 ), or that the spring element (125) is annular and at least partially surrounds the spacer bolt (15, 410) or the guide element (435) on the circumference.