Power transmitting device

Patent metadata

Field	Value
Publication number	US-11401976-B2
Application number	US-201716498861-A
Country	US
Kind code	B2
Filing date	Mar 29, 2017
Priority date	Mar 29, 2017
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

A power transmitting device includes a first rotor and a second rotor rotatably disposed coaxially with a rotational central axis and in facing relation to each other. A first pressing protrusion projecting from the first rotor and a second pressing protrusion projecting from the second rotor are disposed in relative positions on superposed rotation trajectories. A soft rubber member elastically deformable to a large extent and has a small modulus of elasticity and a hard rubber member elastically deformable to a small extent and has a large modulus of elasticity are interposed between the first and second pressing protrusions. While no relative torque load is being applied to the first and second rotors, the soft rubber member is held in contact with both the first and second pressing protrusions, and the hard rubber member is interposed between the first pressing protrusion and the second pressing protrusion with gaps therebetween.

First claim

The invention claimed is:

1. A power transmitting device comprising:
a first rotor and a second rotor that are rotatably disposed coaxially with a rotational central axis and in facing relation to each other;
a first pressing protrusion projecting from the first rotor and a second pressing protrusion projecting from the second rotor, the first pressing protrusion and the second pressing protrusion being disposed in relative positions on superposed rotation trajectories; and
a rubber structural body comprising a first portion that is elastically deformable to a first extent and has a first modulus of elasticity, and a second portion that is elastically deformable to a second extent which is smaller than the first extent, the second portion having a second modulus of elasticity which is larger than the first modulus of elasticity, the rubber structural body being interposed between the first pressing protrusion and the second pressing protrusion;
wherein the first pressing protrusion and the second pressing protrusion are radially elongate;
wherein the first portion of the rubber structural body has a modified sectorial shape as viewed axially along the rotational central axis;
wherein the first portion of the rubber structural body includes a pair of circumferentially spaced, radially elongate end side portions and an interconnecting web interconnecting the end side portions, the interconnecting web being thinner than the end side portions along an axial direction of the rotational central axis;
and wherein, while no relative torque load is being applied to the first rotor and the second rotor;
the first portion of the rubber structural body is held in contact with both the first pressing protrusion and the second pressing protrusion;
the second portion of the rubber structural body is interposed between the first pressing protrusion and the second pressing protrusion with gaps therebetween, and
the first and second portions of the rubber structural body are integrally formed with each other by being connected by a connecting rubber web.

2. The power transmitting device as claimed in claim 1 , wherein the first and second portions of the rubber structural body are fixed to and supported on either one of the first pressing protrusion and the second pressing protrusion.

3. The power transmitting device as claimed in claim 2 ,
wherein the first pressing protrusion and the second pressing protrusion are radially elongate;
the first portion of the rubber structural body is of a modified sectorial shape, as viewed axially along the rotational central axis, and includes a pair of circumferentially spaced, radially elongate end side portions and an interconnecting web interconnecting the end side portions; and
the interconnecting web is thinner than the end side portions along an axial direction of the rotational central axis.

4. The power transmitting device as claimed in claim 2 ,
wherein the second portion of the rubber structural body is of a modified sectorial shape as viewed axially along the rotational central axis;
one of the end side portions of the first portion of the rubber structural body and the second portion of the rubber structural body are connected to each other by the connecting rubber web; and
the first pressing protrusion is pinched between the one of the end side portions of the first portion of the rubber structural body and the second portion of the rubber structural body, and is elastically pinched under pressure by the connecting rubber web.

5. The power transmitting device as claimed in claim 2 , wherein
the first rotor includes an internal-combustion-engine-side rotor with power being transmittable between itself and a crankshaft of an internal combustion engine;
the second rotor includes a starter-generator-side rotor with power being transmittable between itself and an input/output shaft of a starter generator;
the first pressing protrusion includes an internal-combustion-engine-side pressing protrusion; and
the second pressing protrusion includes a starter-generator-side pressing protrusion.

6. The power transmitting device as claimed in claim 1 ,
wherein at least one of the end side portions of the first portion of the rubber structural body has an inner end protrusion projecting in a direction of rotation from a radially inner end thereof near the rotational central axis; and
the interconnecting web of the first portion of the rubber structural body interconnects the end side portions on radially outward sides thereof.

7. The power transmitting device as claimed in claim 6 , wherein at least one of the end side portions of the first portion of the rubber structural body has an outer end protrusion projecting in a direction of rotation from a radially outer end thereof.

8. The power transmitting device as claimed in claim 7 , wherein
the second portion of the rubber structural body is of a modified sectorial shape as viewed axially along the rotational central axis;
one of the end side portions of the first portion of the rubber structural body and the second portion of the rubber structural body are connected to each other by the connecting rubber web; and
the first pressing protrusion is pinched between the one of the end side portions of the first portion of the rubber structural body and the second portion of the rubber structural body, and is elastically pinched under pressure by the connecting rubber web.

9. The power transmitting device as claimed in claim 7 , wherein
the first rotor includes an internal-combustion-engine-side rotor with power being transmittable between itself and a crankshaft of an internal combustion engine;
the second rotor includes a starter-generator-side rotor with power being transmittable between itself and an input/output shaft of a starter generator;
the first pressing protrusion includes an internal-combustion-engine-side pressing protrusion; and
the second pressing protrusion includes a starter-generator-side pressing protrusion.

10. The power transmitting device as claimed in claim 6 , wherein
the second portion of the rubber structural body is of a modified sectorial shape as viewed axially along the rotational central axis;
one of the end side portions of the first portion of the rubber structural body and the second portion of the rubber structural body are connected to each other by the connecting rubber web; and
the first pressing protrusion is pinched between the one of the end side portions of the first portion of the rubber structural body and the second portion of the rubber structural body, and is elastically pinched under pressure by the connecting rubber web.

11. The power transmitting device as claimed in claim 6 , wherein
the first rotor includes an internal-combustion-engine-side rotor with power being transmittable between itself and a crankshaft of an internal combustion engine;
the second rotor includes a starter-generator-side rotor with power being transmittable between itself and an input/output shaft of a starter generator;
the first pressing protrusion includes an internal-combustion-engine-side pressing protrusion; and
the second pressing protrusion includes a starter-generator-side pressing protrusion.

12. The power transmitting device as claimed in claim 1 , wherein the second portion of the rubber structural body is of a modified sectorial shape as viewed axially along the rotational central axis;
one of the end side portions of the first portion of the rubber structural body and the second portion of the rubber structural body are connected to each other by the connecting rubber web; and
the first pressing protrusion is pinched between t

Assignees

• Honda Motor Co Ltd

Inventors

• Mori Hidemichi
• Yokota Hiroshi
• Nojima Satoru
• Murakami Soichiro
• Fukuyoshi Yasuhiro
• Deguchi Toshiaki
• Osaki Yusuke
• Sugio Daisuke
• Hatta Takuya

Classifications

• F16F15/1245 Primary

  Elastic elements arranged between substantially-radial walls of two parts rotatable with respect to each other, e.g. between engaging teeth · CPC title

• F02N11/00

  Starting of engines by means of electric motors · CPC title

• H02K7/00

  Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines · CPC title

• F02N15/046

  of the planetary type · CPC title

• F02N15/02

  Gearing between starting-engines and started engines; Engagement or disengagement thereof · CPC title