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CN-116732985-B - Damping assembly for vibratory pile driver

CN116732985BCN 116732985 BCN116732985 BCN 116732985BCN-116732985-B

Abstract

A damping assembly for a vibratory pile driver is disclosed, wherein the damping assembly comprises an upper part and a lower part connected to a crane and the vibratory pile driver, respectively. The damping assembly includes an inner housing component and an outer housing component, the inner housing component being coupled to the outer housing component. The lower member is connected to the inner assembly of the damping assembly. The inner housing part is connected to the outer housing part. Connected between the inner assembly and the inner housing member are relatively elastomeric shock absorbing members that stretch to varying degrees depending on the weight applied to the vibratory pile driver.

Inventors

  • JOHN L. WHITE

Assignees

  • 约翰·L·怀特

Dates

Publication Date
20260505
Application Date
20230313
Priority Date
20220311

Claims (13)

  1. 1. A damping assembly for a pile driving and/or extracting system, the damping assembly comprising: A lower connection member for connection to a suspended weight portion of a pile driving system, the suspended weight portion operating on a pile; An upper connection member for connection to a crane assembly of the pile driving system, and the upper connection member being connected to a housing of the damping assembly; An inner assembly connected to the lower connecting member, the inner assembly including a shear pin extending through an opening in the outer housing, wherein the damping assembly includes an inner housing connected to the outer housing, and The opposing elastomeric damper members are connected between the inner assemblies and extend to the inner housing, wherein during operation, the weight on the damper assemblies causes a corresponding stretching of the opposing elastomeric members, thereby reducing vibration of the pile driving system during operation.
  2. 2. The damping assembly of claim 1, wherein one end plate of the elastomeric member is connected to the inner member and the other end plate is connected to the inner housing.
  3. 3. The damping assembly of claim 1, wherein if said elastomeric member fails, the shear pin drops downwardly to the lower end of the opening in the housing.
  4. 4. The damping assembly of claim 1, further comprising a selected weight applied to opposite sides of the housing.
  5. 5. The damping assembly of claim 1, wherein the lower connecting member is positioned at 90 degrees to the upper connecting member.
  6. 6. The damping assembly of claim 1, wherein the upper and lower connecting members are shackles.
  7. 7. The damping assembly of claim 1, wherein the suspended weight portion is a vibrating device.
  8. 8. A damping assembly for a vibrating crane system, the damping assembly comprising: A lower connection member for connection to a suspended weight portion of a pile driving system, the suspended weight portion operating on a pile; An upper connection member for connection to a crane rope portion of the crane assembly, and the upper connection member is connected to a housing of the damping assembly; a lower connecting part for connecting the weight; An inner assembly connected to the lower connecting member, the inner assembly including a shear pin extending through an opening in the outer housing, wherein the damping assembly includes an inner housing connected to the outer housing, and The relatively elastomeric shock absorbing members are connected between the inner assemblies and extend to the inner shell, wherein during operation, the weight connected to the shock absorbing assemblies causes a corresponding stretching of the relatively elastomeric members, thereby reducing vibrations of the crane system during operation.
  9. 9. The damping assembly of claim 8, wherein one end plate of the elastomeric member is connected to the inner member and the other end plate is connected to the inner housing.
  10. 10. The damping assembly of claim 8, wherein if said elastomeric member fails, the shear pin drops downwardly to the lower end of the opening in the housing.
  11. 11. The damping assembly of claim 8, further comprising a selected weight applied to opposite sides of the housing.
  12. 12. The assembly of claim 8, wherein the lower connecting member is oriented 90 degrees from the upper connecting member.
  13. 13. The assembly of claim 8, wherein the upper and lower attachment members are shackles.

Description

Damping assembly for vibratory pile driver Technical Field The present invention relates generally to vibratory pile drivers and, more particularly, to damping mechanisms for reducing sloshing and vibration of vibratory pile drivers during operation. Background Some vibratory drivers may exhibit driver sloshing or vibration during operation, particularly at start-up and start-up operations, but sometimes throughout operation. Such an effect is undesirable for the operation and user of such a pile driver. Various attempts have been made to cause shaking/vibration of such drivers during operation. One known arrangement is to use an elastomeric dampener system, such as shown in U.S. patent 5,263,544 to White. Such arrangements include multi-stage systems using various elastomers, all to eliminate sloshing/vibration during pile driver operation. Another means of eliminating wobble is typically a damping or dampening system. In this arrangement, a solid rubber barrel connecting two opposing plates is disposed between them and operates under compression. This arrangement has a positive effect on reducing the sloshing effect of the pile driver. An alternative to such solid rubber devices is to use elastomeric components instead of solid rubber components, but also requires operation under compression, which has been found to be ineffective. Furthermore, if the elastomer fails in this arrangement, the load will drop. Therefore, an effective damping system would be advantageous in pile driving technology. Disclosure of Invention Accordingly, a damping assembly for a pile driving and/or extracting system is disclosed, the damping assembly comprising a lower connection part for connection to a vibrating device part of the pile driving system, an upper connection part for connection to a crane assembly for the pile driving system, and the upper connection part being connected to an outer shell of the damping assembly, an inner assembly connected to the lower connection part, the inner assembly comprising a shear pin extending through an opening in the outer shell, wherein the damping assembly comprises an inner shell connected to the outer shell, a relatively elastomeric shock absorbing part being connected between the inner assemblies and extending to the inner shell, wherein during operation the weight on the damping assembly results in a corresponding stretching of the relatively elastomeric part, thereby reducing vibrations of the pile driving system during operation. Drawings FIG. 1 is a perspective view of a vibratory pile system illustrating a damping assembly of the present invention; FIG. 2 is a partial cross-sectional view of the damping assembly of the present invention with no force applied thereto; FIG. 3 is an elevational, partial cross-sectional view of a damping assembly with a substantial weight applied thereto; FIG. 4A is a simplified elevation view showing stretching of an elastomeric component in the damping assembly without any elastomeric stretching; FIG. 4B is a simplified elevation view showing the elastomeric member stretched to 4 inches; Fig. 4C is a simplified elevation view showing the elastomeric member stretched to 14 inches. Detailed Description Referring now to fig. 1-3, a vibratory pile driver system of the present invention is generally indicated at 10. The system includes a conventional construction crane 12 having an extended boom 14 and crane rope as shown at 16. At the end of the crane rope 16 is a crane hook 19 which is connected to the damping assembly 20 of the invention by means of a first shackle part 22, the first shackle part 22 being bolted to a housing part 24 of the damping assembly 20 by means of an assembly 23. The second loop component 26 is positioned at 90 degrees to the first loop component 22 and is connected to a vibratory pile driver that operates on piles 32 in soil 35. The operation/purpose of the arrangement of fig. 1, including the damping assembly 20, is to reduce, and even significantly reduce, the transmission of vibrations of the vibratory pile driver to the crane rope 16 and boom 14. Referring to fig. 2 and 3, second shackle 26 is connected to an inner assembly 38 including a pin 40 by a bolt assembly 28. The inner assembly 38 includes an inner housing 42 that is coupled to the outer housing 24. The opposing elastomeric shock absorbing members 44 and 46 include inner end plates bolted to the inner assembly 38 and extending to the inner shell 42, which are also bolted through outer end plates. Elastomeric members 44 and 46 are conventional and well known in the pile driver damping art. During operation of the pile driver, the opposing elastomeric members 44 and 46 are stretched together. For convenience, the damping assembly also includes a weight scale 50, but this is not necessary for operation of the damping assembly. In the illustrated embodiment, the scale includes a weight ranging from zero to 45 tons and in 15 tons increments, it being understood t