Drive System

• US 20020062713A1
• Filed: 11/20/2001
• Published: 05/30/2002
• Est. Priority Date: 11/28/2000
• Status: Active Grant

• Current Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: Mannesmann Sachs AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Feldhaus, Reinhard, Peinemann, Bernd, Weth, Jurgen
• Granted Patent: US 6,742,412 B2
• Time in Patent Office: Days
• US Class Current: 74/574
• CPC Class Codes: F16F 15/10 Suppression of vibrations in rotating systems by making use of members moving with the system by balancing F16F15/22 ; yielding couplings F16D3/00 ; with flywheels acting variably or intermittently F16H ; construction providing resilience or vibration-damping for gear elements F16H55/14
• CPC Class Codes: F16F 15/145 Masses mounted with play with respect to driving means thus enabling free movement over a limited range
• CPC Class Codes: F16F 15/31 characterised by means for varying the moment of inertia
• CPC Class Codes: Y10T 74/2128 Damping using swinging masses, e.g., pendulum type, etc.

Abstract

A drive system that includes a drive shaft, which is or can be brought into torque-transmitting connection with a drive train, a secondary drive system for transmitting torque between the drive shaft and at least one auxiliary unit, and at least one vibration-damping device including a deflection mass carrier with freedom to rotate around a rotational axis and at least one deflection mass, which can shift position relative to the deflection mass carrier in at least one deflection plane. Upon deflection of the at least one deflection mass from the home position relative to the deflection mass carrier, the radial position of the deflection mass changes relative to the rotational axis. At least part of the vibration-damping device can be integrated into part of the secondary drive system.

Claims

1. A drive system comprising

a drive shaft which can be brought into torque-transmitting connection with a drive train,

a secondary drive system for transmitting torque between the drive shaft and at least one auxiliary unit, and

a vibration damping device comprising a defection mass carrier with freedom to rotate about a rotational axis, and a deflection mass which can shift with respect to the deflection mass carrier in at least one deflection plane so that the radial position of the deflection mass with respect to said axis changes, at least part of said vibration damping device being integrated into said secondary drive system.

2. The drive system of claim 1, wherein the secondary drive system comprises at least one auxiliary drive wheel coupled to be rotated by the drive shaft, and at least part of the vibration-damping means is a part of the auxiliary drive wheel.

3. The drive system of claim 2, wherein the auxiliary drive wheel comprises a body section, and the deflection mass carrier forms at least a part of the body section.

4. The drive system of claim 3, wherein the auxiliary drive wheel is a gear wheel, and the deflection mass carrier has an outer circumferential area which supports a set of gear teeth.

5. The drive system of claim 3, wherein the auxiliary drive wheel is a chain wheel, and the deflection mass carrier has an outer circumferential area provided with a set of gear teeth.

6. The drive system of claim 2, wherein the auxiliary drive wheel is a pulley having axial sides and a belt guide section on at least one of said axial sides, and at least one of the belt guide sections is a part of the vibration-damping means.

7. The drive system of claim 6, wherein said at least one belt guide section comprises a cover element on the deflection mass carrier which cover element, covers a free space in which at least one of the deflection masses is located.

8. The drive system of claim 7, wherein two cover elements are provided on the deflection mass carrier, the two cover elements forming two belt guide sections of the pulley.

9. The drive system of claim 2, wherein the auxiliary drive wheel is a pulley with a belt roll body, wherein the belt roll body comprises at least part of the vibration-damping means.

10. The drive system of claim 9, wherein the belt roll body comprises the deflection mass carrier.

11. The drive system of claim 2, wherein the at least one deflection mass is located in one of a radial area of the auxiliary drive wheel and radially outside the effective radial area of the wheel.

12. The drive system of claim 2, wherein the auxiliary drive wheel is rigidly coupled to a drive shaft of the at least one auxiliary unit.

13. The drive system of claim 2, wherein the auxiliary drive wheel forms an endless transmission element-tightening pulley mounted rotatably on a support means.

14. The drive system of claim 13, wherein the deflection mass carrier is rotatably coupled to a support means.

15. The drive system of claim 1, wherein the at least one deflection mass is coupled to the deflection mass carrier at at least two connecting areas laterally spaced apart and has a fixed degree of freedom of movement relative to the carrier, wherein each connecting area has a first guide path having a radially outward-located summit area and a second guide path having a radially inward-located summit area, and a connecting bolt slidably guided on the first guide path and on the second guide path with freedom to move along these paths.:

16. The drive system of claim 1, wherein a deflection path is coupled to the deflection mass carrier, along which path the outer circumferential surface of a deflection mass can move, while executing a rolling movement, where the deflection path has a summit area on a radially outward side, and deflection areas which extend from the summit area, the radial distance of which from the rotational axis decreases with increasing distance from the summit area.