Vibration isolation structure

Abstract

The present invention provides a vibration-damping structure that suppresses the misalignment of the rotation center of the rotating body relative to the holder, while also suppressing the transmission of vibrations to the holder. [Solution] The vibration isolation structure 12 comprises a rotating body 20 that is rotatable around an axis and has a large diameter portion, a holder 50 that holds the rotating body 20 and has a recess 52 having an inner wall 53 facing radially inward and a bottom portion 54 facing axially, and a vibration isolation member 60 disposed between the large diameter portion and the recess 52. The vibration isolation member 60 comprises a relay portion 90 having an inner circumferential portion 92 that contacts the large diameter portion, an outer circumferential portion 93 that fits with the inner wall 53, and a back surface 94 facing the bottom portion 54, a vibration isolation portion 80 disposed between the back surface 94 and the bottom portion 54 and having a plate-shaped base material 82 facing axially and a film-shaped elastomer portion 84 that covers the plate surface of the base material 82, and a fixing portion 70 that fixes the relay portion 90 and the vibration isolation portion 80 to the holder 50.

Claims

1. A rotating body that is rotatable around an axis and has a large diameter section, A holder that rotatably holds the aforementioned rotating body, The outer surface facing the axial direction, A recess that is concave with respect to the outer surface and has a larger diameter than the large diameter portion, having an inner wall facing radially inward and a bottom portion facing axially, A holder having, A vibration-damping member disposed between the large-diameter portion and the recess, It is a circular relay section, The inner circumferential portion that contacts the aforementioned large diameter portion, The outer periphery that fits into the inner wall, The first end face facing the bottom side, A second end face facing the opposite side from the first end face, A relay section having, A vibration damping portion is positioned between the first end face and the bottom portion so as to overlap with the first end face in the axial direction, A plate-shaped substrate oriented in the axial direction, A film-like elastomer portion covering the plate surface of the substrate, A vibration-damping section having, A fixing portion for fixing the relay portion and the vibration damping portion to the holding body, A vibration-damping member having, A vibration-damping structure having the following characteristics.

2. The vibration-damping structure according to claim 1, wherein the elastomer portion is provided so as to cover the plate surfaces on both sides of the base material.

3. The vibration-damping portion extends in an annular shape along the first end face, according to claim 1 or claim 2.

4. The vibration-damping structure according to any one of claims 1 to 3, wherein when the holder expands due to heat, the relay portion fits into the inner wall with a gap fit.

5. The vibration-damping structure according to any one of claims 1 to 4, wherein the retainer is made of an aluminum alloy material.

6. The fastening portion is a fastening member that contacts the second end face and includes a fastening member that applies a fastening force to the intermediate portion to fix the intermediate portion and the vibration-damping portion to the holder. The vibration-damping structure according to any one of claims 1 to 5, wherein the thickness of the elastomer portion is 1 mm or less.

7. The rotating body is configured to include a bearing, The vibration-damping structure according to any one of claims 1 to 6, wherein the large-diameter portion is the bearing.

8. The rotating body is configured to include a rolling part that is rotatable on the inner circumference so as to roll relative to the inner circumference, The vibration isolation structure according to any one of claims 1 to 6, wherein the large-diameter portion is the rolling portion.

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