Roller for a pendulum mass of a centrifugal force pendulum

Abstract

A roller (20) for a pendulum mass (4, 5, 6) of a centrifugal force pendulum (1), including a rolling section (42), a first maintaining section (26) and a second maintaining section (27). The maintaining sections have a larger diameter than the rolling section, and the roller (20) has a width (44) which is smaller or the same size as the first depth (9) of the centrifugal force pendulum. Due to roller (20), a centrifugal force pendulum can be constructed for particularly flat couplings. In particular, the total weight of the friction clutch is reduced and the mounting is simplified.

Claims

1. A centrifugal pendulum for a motor vehicle including an internal combustion engine, the centrifugal pendulum comprising: at least one pendulum mass; and a flywheel including an oscillation axis with a first depth and including two lateral surfaces, the flywheel having in at least one of the lateral surfaces at least one opening, the at least one pendulum mass axially movable in the at least one opening; wherein the flywheel provides an axial fixing of the at least one pendulum mass; wherein at least a part of the fixing being formed by a sheet metal disk situated on the flywheel.

2. The centrifugal pendulum as recited in claim 1 wherein the opening axially penetrates the flywheel through both lateral surfaces.

3. The centrifugal pendulum as recited in claim 2 wherein the pendulum mass situated in the opening has a second depth equal to or less than the first depth of the flywheel, so that the pendulum mass situated in the opening is in maximum contact on both sides with the two lateral surfaces of the flywheel.

4. The centrifugal pendulum as recited in claim 1 wherein the pendulum mass forms a plurality of first stops and the flywheel forms a corresponding number of second stops, and further comprising at least one roller being situated between each of the first stops and the second stops.

5. The centrifugal pendulum as recited in claim 1 further comprising a retaining plate situated on at least one side of a pendulum mass and securing the pendulum mass in at least one axial direction on the flywheel.

6. The centrifugal pendulum as recited in claim 5 further comprising two rollers secured on the at least one retaining plate.

7. The centrifugal pendulum as recited in claim 1 further comprising rollers manufactured by sheet metal stamping.

8. A friction clutch for a detachable connection of an output shaft to a drive train, the friction clutch comprising at least one of the following components: at least one pressure plate; a central web; at least one clutch disk; and at least one two-mass flywheel; at least one of the components listed above including the centrifugal pendulum as recited in claim 1.

9. A motor vehicle comprising: an internal combustion engine including the output shaft, the drive train, and the friction clutch for the detachable connection of the output shaft to the drive train as recited in claim 8.

10. The motor vehicle as recited in claim 9 wherein the internal combustion engine is situated forward of a driver's compartment and transverse to a longitudinal axis of the motor vehicle.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present invention and the technical field are explained in greater detail below with reference to the accompanying figures. The figures illustrate particularly preferred exemplary embodiments to which the present invention is not limited. In particular, it should be noted that the accompanying figures and in particular the illustrated scales are only schematic.

(2) FIG. 1 shows a one-piece roller with retaining sections connected to an additional roller;

(3) FIG. 2 shows a two-piece roller;

(4) FIG. 3 shows a two-piece roller installed in a beveled centrifugal pendulum;

(5) FIG. 4 shows a centrifugal pendulum with openings open to the outside;

(6) FIG. 5 shows a centrifugal pendulum in cross section;

(7) FIG. 6 shows a centrifugal pendulum in cross section including the rollers with rims;

(8) FIG. 7 shows a centrifugal pendulum with closed openings;

(9) FIG. 8 shows a friction clutch including centrifugal pendulums, and

(10) FIG. 9 shows a motor vehicle including a friction clutch.

DETAILED DESCRIPTION

(11) FIG. 1 shows a one-piece roller 20 which is situated between a flywheel 7 and a pendulum mass 4. Rolling section 42 makes an absorption movement of the pendulum mass 4 possible. Pendulum mass 4 is axially secured on flywheel 7 with the aid of first retaining section 26 and second retaining section 27. Diameter 43 of retaining sections 26, 27 is enlarged with respect to rolling section 42. In this case, roller 20 is connected to an additional roller 47.

(12) FIG. 2 shows a two-piece roller 20, first retaining section 26 being formed in one piece with first part 45 and second retaining section 27 and rolling section 42 being formed in one piece with second part 46. In this case roller 20 has a form-fitted joint by way of a rivet, for example.

(13) FIG. 3 shows an additional two-piece roller 20 which is situated between a flywheel 7 and a pendulum mass 4. The rest of the configuration is similar to the configuration illustrated in FIG. 2. In this case, a first bevel 48 and a second bevel 49 are provided on flywheel 7 and likewise a first bevel 50 and a second bevel 51 are provided on pendulum mass 4 so that roller 20 has a width 44 which is less than or equal to first depth 9 of flywheel 7.

(14) FIG. 4 shows a centrifugal pendulum 1 having a first opening 12, a second opening 13 and a third opening 14, which are open radially outside oscillation axis 8 in the manner of an indentation. A first pendulum mass 4, a second pendulum mass 5 and a third pendulum mass 6 are situated in openings 12, 13, 14. The respective pendulum masses 4, 5, 6 are supported with the aid of a left first stop 16 and a right first stop 17 via a first roller 20 and a second roller 21 and corresponding left second stops 18 and right second stops 19. The pendulum masses 4, 5, 6 are axially secured with the aid of retaining plate 22.

(15) FIG. 5 shows a side view of a centrifugal pendulum 1 in cross-section, whereby it is apparent that first depth 9 of flywheel 7 equals second depth 15 of pendulum mass 4. First pendulum mass 4 does not project beyond first surface 10 or second surface 11, but ends flush with these surfaces. First retaining plate 22 and second retaining plate 23 are apparent, which are riveted to each other on pendulum mass 4 and secure pendulum mass 4 axially.

(16) FIG. 6 shows a section through a centrifugal pendulum 1, a first roller 20 being secured with the aid of a first fixing 24 and a second fixing 25 axially with a first rim 26 and a second rim 27. First pendulum mass 4 rolls off over first roller 20 and is axially secured by first and second fixings 24, 25, which are made of sheet metal and are permanently connected to flywheel 7.

(17) FIG. 7 shows an arrangement of a centrifugal pendulum 1 similar to that illustrated in FIG. 4, in this specific embodiment openings 12, 13, 14 being closed toward the outside. FIG. 8 shows a friction clutch 28 in which an output shaft 29 is detachably connectable to a drive train 30. Friction clutch 28 is in this case in the form of a dual clutch including a first output shaft 40 and a second output shaft 41 which form a part of drive train 30. For this purpose first pressure plate 31 may be pressed toward central web 33, whereby first clutch disk 34 is clamped. A torque is therefore transmittable from output shaft 29 to first output shaft 40. Likewise a torque is transmittable via second pressure plate 32, second clutch disk 35 and central web 33 to second output shaft 41. Output shaft 29 has a two-mass flywheel 36. First pressure plate 31 and second pressure plate 32 are each in the form of a centrifugal pendulum 1 as described above.

(18) FIG. 9 shows a motor vehicle 2 including an internal combustion engine 3, output shaft 29 of internal combustion engine 3 being detachably connectable with the aid of a friction clutch 28 to drive train 30 which is shown only schematically. Internal combustion engine 3 is oriented with its engine axis 39 transverse to longitudinal axis 38 of motor vehicle 2 and is situated forward of driver's compartment 37.

(19) With the roller provided here, a centrifugal pendulum for particularly flat clutches may be constructed. In particular, the total weight of the friction clutch is also reduced and assembly is facilitated.

LIST OF REFERENCE NUMERALS

(20) 1 Centrifugal pendulum 2 Motor vehicle 3 Internal combustion engine 4 First pendulum mass 5 Second pendulum mass 6 Third pendulum mass 7 Flywheel 8 Oscillation axis 9 First depth 10 First surface 11 Second surface 12 First opening 13 Second opening 14 Third opening 15 Second depth 16 Left first stop 17 Right first stop 18 Left second stop 19 Right second stop 20 First roller 21 Second roller 22 First retaining plate 23 Second retaining plate 24 First axial fixing 25 Second axial fixing 26 First retaining section 27 Second retaining section 28 Friction clutch 29 Output shaft 30 Drive train 31 First pressure plate 32 Second pressure plate 33 Central web 34 First clutch disk 35 Second clutch disk 36 Two-mass flywheel 37 Driver's compartment 38 Longitudinal axis 39 Engine axis 40 First output shaft 41 Second output shaft 42 Rolling section 43 Diameter 44 Width 45 First part 46 Second part 47 Additional roller 48 First bevel of the flywheel 49 Second bevel of the flywheel 50 First bevel of the pendulum mass 51 Second bevel of the pendulum mass