Adaptable multi-element vibration isolator

• US 9,057,415 B1
• Filed: 06/17/2011
• Issued: 06/16/2015
• Est. Priority Date: 06/17/2011
• Status: Expired due to Fees

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Plangetis, Gus F.
• Primary Examiner(s): Siconolfi, Robert A
• Assistant Examiner(s): Nguyen, Vu Q
• Application Number:
  US13/162,983
• Time in Patent Office: 1,460 Days
• Field of Search: 267/140.5, 267/141, 267/141.1, 267/141.2
• US Class Current: 1/1
• CPC Class Codes: F16F 1/373 characterised by having a particular shape F16F9/58 takes precedence
• CPC Class Codes: F16F 1/40 consisting of a stack of similar elements separated by non-elastic intermediate layers F16F9/306 takes precedence; laminated constructions to protect buildings against abnormal external influences, e.g. earthquakes, E04H9/022
• CPC Class Codes: F16F 1/406 characterised by the shape of the elastic elements
• CPC Class Codes: F16F 3/08 with springs made of a material having high internal friction, e.g. rubber multi-part grommet-type resilient mountings F16F1/3735
• CPC Class Codes: F16F 3/0876 and of the same shape

Abstract

The present invention'"'"'s vibration/shock amelioration device, as typically embodied, has a geometric device axis and includes two axial endplates, an intermediate support structure, and at least six truncated-conical resilient (e.g., elastomeric) elements. The intermediate support structure is equidistant between the endplates and lies in a geometric bisector plane that is perpendicular to the device axis. Each resilient element has a geometric conical axis, a larger-diameter axial end, and a smaller-diameter axial end. The resilient elements are fixed between the support structure and an endplate and are arranged symmetrically with respect to the device axis whereby the conical axes intersect the device axis at oblique angles and the smaller-diameter axial ends are closer to the bisector plane than are the larger-diameter axial ends. The intermediate support structure can include a single rigid piece, or a composite unit having a pair of rigid members and a resilient (e.g., elastomeric) member sandwiched therebetween.

Claims

1. An apparatus for attenuating shock and/or vibration, the apparatus comprising an upper end structure, a lower end structure, a medial structure between said upper end structure and said lower end structure, and at least six resilient elements, each said resilient element including a hollow frustoconical elastomeric body, a larger-diameter rigid circular endplate, and a smaller-diameter rigid circular endplate, wherein:

the apparatus is characterized by a geometric apparatus axis;

each said hollow frustoconical elastomeric body is characterized by a geometric body axis and two body-axial ends;

in each said hollow frustoconical elastomeric body, said larger-diameter rigid circular endplate and said smaller-diameter rigid circular endplate are respectively attached to said hollow frustoconical elastomeric body at said two body-axial ends of said hollow frustoconical elastomeric body;

said upper end structure is characterized by at least three upper-end recesses;

said lower end structure is characterized by at least three lower-end recesses;

said medial structure is characterized by at least three upper-medial recesses and at least three lower-medial recesses;

at least three said resilient elements are upper said resilient elements;

at least three said resilient elements are lower said resilient elements;

the upper said resilient elements are respectively secured between said upper end structure and said medial structure whereby the respective said geometric body axes of the upper said resilient elements are disposed at the same oblique angle with respect to said geometric apparatus axis;

the lower said resilient elements are respectively secured between said lower end structure and said medial structure whereby the respective said geometric body axes of the lower said resilient elements are disposed at the same oblique angle with respect to said geometric apparatus axis;

each of the upper said resilient elements is secured between said upper end structure and said medial structure whereby said larger-diameter rigid circular endplate fits in a said upper end recess and whereby said smaller-diameter rigid circular endplate fits in a said upper-medial recess;

each of the lower said resilient elements is secured between said lower end structure and said medial structure whereby said larger-diameter rigid circular endplate fits in a said lower end recess and whereby said smaller-diameter rigid circular endplate fits in a said lower-medial recess.

2. The apparatus of claim 1 wherein said at least six resilient elements are arranged symmetrically with respect to said geometric apparatus axis in equal numbers of at least three upper said resilient elements and at least three lower said resilient elements.

3. The apparatus of claim 2 wherein:

the at least three upper said resilient elements are situated in a first geometric plane that is perpendicular to said geometric apparatus axis;

the at least three lower said resilient elements are situated in a second geometric plane that is perpendicular to said geometric apparatus axis;

all of said at least six resilient elements are substantially the same.

4. The apparatus of claim 3 wherein the at least three upper said resilient elements are in one-to-one collocative correspondence with the at least three lower said resilient elements.

5. The apparatus of claim 2 wherein:

the at least three upper said resilient elements are substantially the same and are situated in a first geometric plane that is perpendicular to said geometric apparatus axis;

the at least three lower said resilient elements are substantially the same and are situated in a second geometric plane that is perpendicular to said geometric apparatus axis;

the at least three upper said resilient elements differ from the at least three lower said resilient elements.

6. The apparatus of claim 5 wherein the at least three upper said resilient elements are in one-to-one collocative correspondence with the at least three lower said resilient elements.

7. The apparatus of claim 1 wherein said medial structure is a unitary rigid structure.

8. The apparatus of claim 1 wherein said medial structure includes two rigid members and an elastomeric layer sandwiched therebetween.

9. The apparatus of claim 1 wherein the apparatus further comprises an elongate snubber, said upper end structure being characterized by an upper end central aperture, said lower end structure being characterized by a lower end central aperture, said medial structure being characterized by a medial central aperture, said elongate snubber passing through said upper end central aperture, said lower end central aperture, and said medial central aperture without contacting said upper end structure, said lower end structure, and said medial structure, said elongate snubber being affixed to said upper end structure.

10. An isolation mount characterized by a geometric mount axis and, perpendicular thereto, a geometric medial plane, said isolation mount comprising plural resilient elements, a straight snubber member coincident with said geometric mount axis, and a housing for said resilient elements, said housing including two mount-axially extreme sections and a mount-axially medial section lying in said geometric medial plane, each of said two mount-axially extreme sections having an extreme-mount central void, said mount-axially medial section having a medial-mount central void, said extreme-mount central voids and said medial-mount central voids being aligned along said geometric mount axis, said straight snubber member extending through said medial-mount central void and said extreme-mount central voids without contacting said two mount-axially extreme sections and said mount-axially medial section, said straight snubber member being fastened to one of said two mount-axially extreme sections;

wherein each said resilient element;

is characterized by a geometric elemental axis, said geometric elemental axis intersecting said geometric mount axis and being obliquely angled with respect to both said geometric mount axis and said geometric medial plane;

includes a hollow elastomeric frustoconical body, a smaller rigid circular endplate, and a larger rigid circular endplate, said larger rigid circular endplate and said smaller rigid circular endplate being attached to said hollow elastomeric frustoconical body at opposite geometric elemental axial ends of said resilient element;

joins a mount-axially extreme section and said mount-axially medial section so that said larger rigid circular endplate mates with said mount-axially extreme section via a circular recess in said mount-axially extreme section, and so that said smaller rigid circular endplate mates with said mount-axially medial section via a circular recess in said mount-axially medial section, at least three said resilient elements joining a first said mount-axially extreme section and said mount-axially medial section, at least three said resilient elements joining a second said mount-axially extreme section and said mount-axially medial section.

11. The isolation mount of claim 10 wherein said mount-axially medial section is bisected by said geometric medial plane.

12. The isolation mount of claim 11, wherein each said resilient element is positioned so that said smaller rigid endplate is closer than said larger rigid endplate to both said geometric mount axis and said geometric medial plane.

13. The isolation mount of claim 10, wherein:

said mount-axially extreme sections are an upper mount-axially extreme section and a lower mount-axially extreme section;

said resilient elements are at least three upper resilient elements and at least three lower resilient elements;

said upper resilient elements join said upper axially extreme section and said mount-axially medial section;

said lower resilient elements join said lower axially extreme section and said mount-axially medial section.

14. The isolation mount of claim 13, wherein:

said upper resilient elements lie in an upper geometric extreme plane;

said lower resilient elements lie in a lower geometric extreme plane;

said geometric medial plane, said upper geometric extreme plane, and said lower geometric extreme plane are parallel to each other;

said geometric elemental axes corresponding to said upper resilient elements are spaced apart equiangularly with respect to said geometric mount axis;

said geometric elemental axes corresponding to said lower resilient elements are spaced apart equiangularly with respect to said geometric mount axis.

15. The isolation mount of claim 14, wherein:

the number of said upper resilient elements equals the number of said lower resilient elements;

said upper resilient elements and said lower resilient elements are vertically aligned with each other.

16. The isolation mount of claim 15, wherein all of said resilient elements are approximately identical.

17. The isolation mount of claim 15, wherein:

all of said upper resilient elements are approximately identical;

all of said lower resilient elements are approximately identical;

said upper resilient elements and said lower resilient elements differ from each other.

18. The isolation mount of claim 15, wherein said mount-axially medial section is either:

an entirely rigid structure;

or, a partly rigid, partly elastomeric structure;

said partly rigid, partly elastomeric structure having an elastomeric member intermediate two rigid members.

19. A device for attenuating shock and vibration, the device having a geometric device axis and comprising a housing and an even number of at least six resilient elements, said housing including two parallel axis-wise end structures and an axis-wise intermediate structure, each said resilient element including a hollow truncated conical resilient body a larger-diametric rigid endplate, and a smaller-diametric rigid endplate, each said hollow truncated conical resilient body having a larger-diametric body end and a smaller-diametric body end, said larger-diametric rigid endplate being coupled with said hollow truncated conical resilient body at said larger-diametric body end, said smaller-diametric rigid endplate being coupled with said hollow truncated conical resilient body at said smaller-diametric body end, said resilient elements being arranged in equal numbers in a first group and a second group, the first group being set between said intermediate structure and the first said end structure wherein each said resilient element has said larger-diametric rigid endplate fastened to the first said end structure and has said smaller-diametric rigid endplate fastened to said intermediate structure, the second group being set between said intermediate structure and the second said end structure wherein each said resilient element has said larger-diametric rigid endplate fastened to the second said end structure and has said smaller-diametric rigid endplate fastened to said intermediate structure, each said resilient element being obliquely disposed at the same angle relative to said device axis so that its smaller diametric element end is nearer than its larger diametric element end to said device axis and to said intermediate structure.

20. The device of claim 19 wherein the apparatus further comprises a linear snubber, the first said end structure being characterized by a first center through-hole, the second said end structure being characterized by a second center through-hole, said medial structure being characterized by a medial center through-hole, said linear snubber non-contiguously passing through said first center through-hole, said second center through-hole, and said medial center through-hole.