Patent EA-000958-B1 (EA)
Title: Integrated vibratory adapter device for providing multi-frequency oscillation of a vibratable working unit
Inventor: KRUSH IONA
IPC: B60B3/00
Filed: 1997-12-15
Abstract: 1. An integrated vibratory adapter device for providing multi-frequency oscillation of a vibratable working unit, which includes:a working member associated with the working unit so as to be in force transmissive relation therewith; centrifugal vibratory means for generating a single frequency sinusoidal vibration; rigid impact means arranged to receive a single frequency sinusoidal vibration from said vibratory means; and resilient mounting means for mounting said rigid impact means in motion transmitting association with said working member and which is operative, when said vibratory means is operated so as to vibrate said rigid impact means such that it transmits vibration forces to said working member and at least one elastic buffer member arranged between said rigid impact mans and said working units, wherein said rigid impact means is mounted operative so as to make elastic impacts on said working unit via said elastic buffer means and transmitting continuous sequence of mechanical impact impulses to said working unit to cause multi-frequency oscillation thereof, thereby also to cause multi-frequency oscillation of the working unit. 2. An adapter device according to claim 1, wherein said rigid impact means includes a generally planar rigid impact portion, and said device further includes elastic buffer means, and wherein said resilient mounting means includes means for mounting said rigid impact means such that said planar rigid impact portion thereof is spaced apart from said working member, and wherein said buffer means is arranged between said working member and said planar rigid impact portion so as to transfer oscillation forces from said impact means to said working member. 3. An adapter device according to claim 2, wherein said vibratory means is connected to said impact means via a rigid housing which is operative to transfer said single frequency sinusoidal vibrations to said impact means. 4. An adapter device according to claim 3, wherein said working member forms part of a rigid base assembly having rigid wall portions extending transversely therefrom, and said resilient mounting means includes at least a pair of resilient members located between and connected to said rigid wall portions and said rigid impact means, so as to support said impact means in a floating mounting relative to said working member so as to permit motion of said impact means having generally forward and rearward components with respect to said working member. 5. An adapter device according to claim 4, wherein said resilient members are of predetermined stiffhess which permits predetermined vibration of said impact means, and wherein said adapter device further includes means for preventing overheating of said resilient members. 6. An adapter device according to claim 5, wherein said impact means is operative to impact said working member via said elastic buffer means when moving in a direction having a generally forward motion component, and said impact means is operative to move away from said working member when moving in a direction having a generally rearward motion component, and wherein said means for preventing overheating includes means for limiting rearward motion of said impact means. 7. An adapter device according to claim 5, wherein said rigid base assembly further includes a base portion rigidly connected to said rigid wall portions and generally parallel to said working member, and said elastic buffer means includes forward buffer means, and wherein said means for preventing overheating includes rearward elastic buffer means arranged between said impact means and said base portion for elastically limiting said rearward motion component of said impact means. 8. An adapter device according to claim 4, wherein said pair of resilient members are operative to partially resist said forward and rearward motion components of said impact means. 9. An adapter device according to claim 8, wherein said pair of resilient members are operative to resist said forward and rearward motion components of said impact means in shear.  10. An adapter device according to claim 9, wherein said resilient members include precompressed elastic portions having a much lower shear stiffness in shear planes generally parallel to said forward and rearward motion components of said impact means than normal thereto. 11. An adapter device according to claim 10, wherein the ratio of the stiffness of said resilient members along said shear planes to the stiffness of said resilient members in a direction normal thereto is less than 20. 12. An adapter device according to claim 2, wherein said elastic buffer means includes a generally planar portion of a resilient material. 13. An adapter device according to claim 12, wherein said elastic buffer means has a generally uniform thickness. 14. An adapter device according to claim 2, wherein said elastic buffer means includes at least one portion of a resilient material and is of varying thickness. 15. An adapter device according to claim 9, wherein said base assembly has formed in one of said rigid wall portions an opening permitting insertion and removal therethrough of one of said elastic portions, and further includes cover means fastenable to said wall portion for closing said opening, thereby also to compress said elastic portion. 16. An adapter device according to claim 1, wherein said working member is configured to generally surround said impact means, and wherein said resilient mounting means includes means for mounting said rigid impact means so as to be spaced apart from said working member, and wherein said buffer means is arranged between said working member and said impact means so as to transfer oscillation forces from said impact means to said working member.