Damped propshaft assembly and tuned damper for a damped propshaft assembly

Patent metadata

Field	Value
Publication number	US-10704643-B2
Application number	US-201816028467-A
Country	US
Kind code	B2
Filing date	Jul 6, 2018
Priority date	Apr 16, 2014
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A damped propshaft assembly with a hollow shaft and a tuned damper, which is received in the hollow shaft and includes a liner and a damping member. The liner's mass and stiffness are tuned to attenuate one or more of a bending mode vibration and a torsion mode vibration that occurs at a first predetermined frequency. The liner is not configured to substantially damp shell mode vibration that occurs at a frequency that is not equal to the first predetermined frequency. The damping member is coupled to the liner and is configured to primarily attenuate shell mode vibration in the hollow shaft at one or more desired frequencies. The tuned damper attenuates the at least one of the bending moment vibration and the torsion mode vibration at the first predetermined frequency and also attenuates shell mode vibration. A method for forming a damped propshaft assembly is also provided.

First claim

What is claimed is:

1. A damped propshaft assembly comprising:
a hollow shaft; and
at least one damper received in the hollow shaft, each of the at least one damper having a structural member, a resilient member and a damping member, the structural member comprising a core, an intermediate member and a cover, the intermediate member being fixedly coupled to the core, the cover being fixedly coupled to the intermediate member and defining a helical gap, the resilient member having a base and a lip member, the base being disposed between the intermediate member and the cover, the lip member being coupled to the base and extending through the helical gap and engaging an interior circumferential surface of the hollow shaft, the damping member being coupled to the cover and engaging the interior circumferential surface of the hollow shaft.

2. The damped propshaft assembly of claim 1 , wherein the damping member is wound onto the cover.

3. The damped propshaft assembly of claim 1 , wherein the damping member provides broadband damping.

4. The damped propshaft assembly of claim 3 , wherein the broadband damping includes damping of shell mode vibration and damping of bending mode vibration at a plurality of frequencies.

5. The damped propshaft assembly of claim 4 , wherein the damping member is a resistive absorber.

6. The damped propshaft of claim 4 , wherein each resilient member of each of the at least one damper is configured to contact the interior circumferential surface of the hollow shaft over a first area, wherein the damping member of each of the at least one damper is configured to contact the interior circumferential surface of the hollow shaft over a second area, and wherein a ratio of first area to the second area is less than or equal to five (5) percent.

7. The damped propshaft assembly of claim 6 , wherein the ratio of the first area to the second area is less than or equal to two and one-half (2.5) percent.

8. The damped propshaft assembly of claim 7 , wherein the ratio of the first area to the second area is less than or equal to one and one-quarter (1.25) percent.

9. The damped propshaft assembly of claim 3 , wherein the broadband damping includes damping of shell mode vibration and damping of torsion mode vibration at a plurality of frequencies.

10. The damped propshaft assembly of claim 9 , wherein the damping member is a resistive absorber.

11. The damped propshaft of claim 9 , wherein each resilient member of each of the at least one damper is configured to contact the interior circumferential surface of the hollow shaft over a first area, wherein the damping member of each of the at least one damper is configured to contact the interior circumferential surface of the hollow shaft over a second area, and wherein a ratio of first area to the second area is less than or equal to five (5) percent.

12. The damped propshaft assembly of claim 11 , wherein the ratio of the first area to the second area is less than or equal to two and one-half (2.5) percent.

13. The damped propshaft assembly of claim 12 , wherein the ratio of the first area to the second area is less than or equal to one and one-quarter (1.25) percent.

14. The damped propshaft assembly of claim 1 , wherein the structural member and the resilient member of each damper form an intermediate damper, and wherein each intermediate damper is not configured to damp shell mode vibration occurring at a frequency that is less than or equal to a predetermined threshold frequency.

Assignees

• American Axle & Mfg Inc

Inventors

• Ley Jason
• Sun Zhaohui
• Braun William
• Nyquist Jeffrey P
• Voight Michael A

Classifications

• F16F15/322 Primary

  the rotating body being a shaft (F16F15/34, F16F15/36 take precedence) · CPC title

• F16F15/10

  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 title

• Y10T29/4957

  Sound device making · CPC title

• F16C3/02 Primary

  Shafts; Axles · CPC title

• F16C2326/06

  Drive shafts · CPC title