Vibration isolator with series and/or parallel conical disc spring member arrangements

Patent metadata

Field	Value
Publication number	US-11137045-B2
Application number	US-201715841978-A
Country	US
Kind code	B2
Filing date	Dec 14, 2017
Priority date	Dec 14, 2017
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

An energy-absorbing structure for a vibration isolator includes a conical disc spring member having a first end including a central opening and a second end opposite the first end. The structure also includes at least one spacer having a base portion with a first side. The base portion first side defines a cavity structured to receive therein a second end of the spring member. The cavity has a floor, and a second end of the spring member is positioned in contact with the floor. The floor includes an opening formed therein and positioned so as to reside opposite the first end of the spring member when the second end of the spring member is positioned in contact with the cavity floor. The opening is structured to receive at least a portion of the first end of the spring member therein during an inversion of the spring member.

First claim

What is claimed is:

1. An energy-absorbing structure for a vibration isolator comprising:
a first conical disc spring member having a first end including a central opening of the first conical disc spring member, and a second end opposite the first end, the first conical disc spring member also having a central axis;
at least one first spacer including a base portion having a first side, the at least one first spacer base portion first side defining a first cavity structured to receive therein the second end of the first conical disc spring member, the first cavity having a first cavity floor, the second end of the first conical disc spring member being positioned in contact with the first cavity floor, the first cavity floor including a first opening formed therein and positioned so as to reside opposite the first end of the first conical disc spring member when the second end of the first conical disc spring member is positioned in contact with the first cavity floor, the first opening being structured to receive at least a portion of the first end of the first conical disc spring member therein during an inversion of the first conical disc spring member during loading of the first conical disc spring member; and
a second conical disc spring member, the second conical disc spring member having a first end including a central opening of the second conical disc spring member, and a second end opposite the first end, the second conical disc spring member also having a central axis, wherein the at least one first spacer base portion first side also defines a second cavity structured to receive therein the second end of the second conical disc spring member, the second cavity having a second cavity floor, the second end of the second conical disc spring member being positioned in contact with the second cavity floor, the second cavity floor including a second opening formed therein and positioned so as to reside opposite the first end of the second conical disc spring member when the second end of the second conical disc spring member is received in the second cavity, the second opening being structured to receive at least a portion of the first end of the second conical disc spring member therein during an inversion of the second conical disc spring member during loading of the second conical disc spring member.

2. The energy-absorbing structure of claim 1 further comprising a third conical disc spring member having a first end including a central opening of the third conical disc spring member, and a second end opposite the first end, the third conical disc spring member also having a central axis, wherein the at least one first spacer base portion includes a second side opposite the first side, wherein the at least one first base portion second side defines a third cavity structured to receive therein the second end of the third conical disc spring member, the third cavity having a third cavity floor, the second end of the third conical disc spring member being positioned in contact with the third cavity floor, the third cavity floor including a third opening formed therein and positioned so as to reside opposite the first end of the third conical disc spring member when the second end of the third conical disc spring member is received in the third cavity, the third opening being structured to receive at least a portion of the first end of the third conical disc spring member therein during an inversion of the third conical disc spring member during loading of the first conical disc spring member.

3. The energy-absorbing structure of claim 2 further comprising at least one second spacer structured to engage the first end of the third conical disc spring member to enable application of a force to the third conical disc spring member tending to deflect the one of the first end and the second end of the third conical disc spring member toward the other one of the first end and the second end of the third conical disc spring member, the at least one second spacer also being structured to engage a first end of another conical disc spring member to enable application of a force to the other conical disc spring member tending to deflect one of the first end and a second end of the other conical disc spring member toward the other one of the first end and the second end of the other conical disc spring member.

4. The energy-absorbing structure of claim 2 wherein the third cavity is positioned on the second side of the at least one first spacer base portion directly opposite one of the first cavity and the second cavity.

5. The energy-absorbing structure of claim 2 further comprising a fourth conical disc spring member having a first end including a central opening of the fourth conical disc spring member, and a second end opposite the first end, the fourth conical disc spring member also having a central axis, wherein the at least one first base portion second side defines a fourth cavity structured to receive therein the second end of the fourth conical disc spring member, the fourth cavity having a fourth cavity floor, the second end of the fourth conical disc spring member being positioned in contact with the fourth cavity floor, the fourth cavity floor including a fourth opening formed therein and positioned so as to reside opposite a first end of the fourth conical disc spring member when the second end of the fourth conical disc spring member is received in the fourth cavity, the fourth opening being structured to receive at least a portion of the first end of the fourth conical disc spring member therein during an inversion of the fourth conical disc spring member during loading of the first conical disc spring member.

6. The energy-absorbing structure of claim 1 further comprising at least one projection extending from the at least one first spacer base portion, the at least one projection including at least one shoulder extending therefrom, the at least one shoulder being structured to engage a portion of another conical disc spring member adjacent a central opening of the other conical disc spring member, to enable application of a force to a first end of the other conical disc spring member using the at least one projection.

7. The energy-absorbing structure of claim 1 further comprising another conical disc spring member positioned in parallel with the first conical disc spring member, and wherein surfaces of the first conical disc spring member and the other conical disc spring member are in physical contact with each other.

8. A vibration isolator comprising a spacer having a base portion with a first side and a second side opposite the first side, the base portion first side including at least one cavity structured to receive therein a portion of a first conical disc spring member and at least one projection extending from the second side and structured to engage a portion of a second conical disc spring member so that a central axis of the first conical disc spring member is non-coaxial with a central axis of the second conical disc spring member when the portion of the first conical disc spring member is received in the at least one cavity and the portion of the second conical disc spring member is engaged with the at least one projection.

9. The vibration isolator of claim 8 further comprising a plurality of projections extending from the base portion second side, each projection of the plurality of projections being structured to engage a portion of a portion of an associated second conical disc spring member so that a central axis of the associated second conical disc spring member is non-coaxial with the central axis of the first conical disc spring member.

10. The vibration isolator of claim 9 wherein a number of project

Assignees

• Toyota Eng & Mfg North America

Inventors

• Gandhi Umesh N
• Tsuruta Ryohei
• Pinkelman Brian J
• Singh Rajendra
• Mastricola Nicholas P

Classifications

• F16F2228/063

  Negative stiffness · CPC title

• F16F2228/004

  Force or pressure · CPC title

• F16F1/32 Primary

  Belleville-type springs (friction-clutch diaphragm springs F16D13/583) · CPC title

• F16F3/02

  with springs made of steel or of other material having low internal friction · CPC title

• F16F15/12353 Primary

  Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations · CPC title