# US 9,038,793 B2 · Centrifugal pendulum device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,038,793 B2 - Document ID: US9038793B2 - Status: Granted - Kind: B2 - Application number: 13/764,171 - Filed: 2013-02-11 - Published: 2013-06-13 - Granted: 2015-05-26 - Earliest claimed: 2010-08-19 - Assignees: Schaeffler Technologies AG & Co. KG - Applicants: Schaeffler Technologies AG & Co. KG - Inventors: Thorsten Krause; Kai Schenck; Stephan Maienschein - Web page: https://patentgrep.com/patent/US9038793B2 ## CPC - F16F 15/145: {Masses mounted with play with respect to driving means thus enabling free movement over a limited range} - F16D 3/12: specially adapted for accumulation of energy to absorb shocks or vibration (by making use of fluid elements F16D3/80) - Y10T 74/2128: Damping using swinging masses, e.g., pendulum type, etc. - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Centrifugal pendulum device including pendulum masses arranged on axial sides of a pendulum mass support rotatable about an axis of rotation to form a pendulum mass pair. To form the mass pair, the masses are fastened to each other by means of a fastener passing through a cutout in the mass support. The mass pair is pivotable relative to the mass support due to a rolling element arranged to roll in a recess of the mass support and of the mass. In a section axially covering the recess of the mass support, the rolling element has a first outer diameter. In a section axially covering the recess of the pendulum mass, the rolling element has a second outer diameter. The rolling element further comprises a section axially located between the first and second diameters and has a third diameter, which is smaller than or equal to the first outer diameter. ## Claims ### Claim 1 A centrifugal pendulum device (10), comprising: first and second pendulum masses (20) arranged on both axial sides of a pendulum mass support (12) rotatable about an axis of rotation (100) to form a pendulum mass pair (22); a fastener (24) passing through a cutout (26) formed in the pendulum mass support (12) to fasten the first and second pendulum masses (20) to each other to form the pendulum mass pair (22); and, a rolling element (28) arranged to roll in a first recess (30) formed in the pendulum mass support (12) and in a second recess (32) formed in the first pendulum mass (20) to allow the pendulum mass pair (22) to pivot relative to the pendulum mass support (12), the rolling element (28) having a first outer diameter (37) in a first section (34) located within the first recess (30) of the pendulum mass support (12) and a second outer diameter (41) in a second section (42) located within the second recess (32) of the first pendulum mass (20); wherein the rolling element (28) has a third section (46) axially located between the first outer diameter and the second outer diameter and having a third outer diameter (48), the third diameter being smaller than the first outer diameter (37). ### Claim 2 (depends on 1) The centrifugal pendulum device (10) recited in claim 1, wherein the first outer diameter (37) is greater than the second outer diameter (41). ### Claim 3 (depends on 1) The centrifugal pendulum device (10) recited in claim 1, wherein a spacer element (52) for limiting an axial minimum distance between the pendulum mass support (12) and the pendulum mass (20) is formed on a pendulum mass (20) side face (50) axially facing the pendulum mass support (12) to limit an axial minimum distance between the pendulum mass support (12) and the pendulum mass (20). ### Claim 4 (depends on 3) The centrifugal pendulum device (10) recited in claim 3, wherein the spacer element (52) is a pin. ### Claim 5 (depends on 3) The centrifugal pendulum device (10) recited in claim 3, wherein the spacer element (52) is formed integrally with the pendulum mass (20). ### Claim 6 (depends on 3) The centrifugal pendulum device (10) recited in claim 3, wherein the spacer element (52) is fixed to the pendulum mass (20) as a separate component. ### Claim 7 (depends on 6) The centrifugal pendulum device (10) recited in claim 6, wherein the spacer element (52) and the pendulum mass (20) are riveted or welded or glued or soldered or screwed or splined together. ### Claim 8 A torsional vibration damper, comprising: a damper input piece; a damper output piece rotatable to a limited extent relative to the damper input piece due to the action of energy storage elements; and, a centrifugal pendulum device arranged on the damper input piece and/or on the damper output piece, the centrifugal pendulum device comprising: first and second pendulum masses (20) arranged on both axial sides of a pendulum mass support (12) rotatable about an axis of rotation (100) to form a pendulum mass pair (22); a fastener (24) passing through a cutout (26) formed in the pendulum mass support (12) to fasten the first and second pendulum masses (20) to each other to form the pendulum mass pair (22); and, a rolling element (28) arranged to roll in a first recess (30) formed in the pendulum mass support (12) and in a second recess (32) formed in the first pendulum mass (20) to allow the pendulum mass pair (22) to pivot relative to the pendulum mass support (12), the rolling element (28) having a first outer diameter (37) in a first section (34) located within the first recess (30) of the pendulum mass support (12) and a second outer diameter (41) in a second section (42) located within the second recess (32) of the first pendulum mass (20); wherein: the rolling element (28) has a third section (46): axially located between the first and second portions in a direction parallel to the axis of rotation; and, having a third outer diameter (48); and, the third outer diameter is smaller than the first outer diameter (37). ### Claim 9 A torsional vibration damper, comprising: a damper input piece; a damper output piece; an intermediate damper piece between the damper input piece and the damper output piece and rotatable to a limited extent relative to: the damper input piece due to the action of first energy storage elements; and the damper output piece due to the action of second energy storage elements and wherein a centrifugal pendulum device is arranged on the intermediate damper piece, the centrifugal pendulum device comprising: pendulum masses (20) arranged on both axial sides of a pendulum mass support (12) rotatable about an axis of rotation (100) to form a pendulum mass pair (22); a fastener (24) passing through a cutout (26) formed in the pendulum mass support (12) to fasten the pendulum masses (20) to each other to form the pendulum mass pair (22); and, a rolling element (28): arranged to roll in a recess (30, 32) formed in the pendulum mass support (12) and in the pendulum mass (20) to allow the pendulum mass pair (22) to pivot to a limited extent relative to the pendulum mass support (12), the rolling element (28) having a first outer diameter (37) in a first section (34) located within the recess (32) of the pendulum mass support (12) and a second outer diameter (41) in a second section (42) located within the recess (32) of the pendulum mass (20); wherein the rolling element (28) has a third section (46): axially located between the first and second portions; not located in the first or second recess; and, having a third outer diameter (48), the third diameter being smaller than the first outer diameter (37).