US 12,655,903 B2Granted

Power transmission device

AssigneeHonda Motor Co., Ltd.

InventorsTakashi Wakui, Motoshi Togasaki, Masahiro Imai, Kazuki Sakurai

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Abstract

A power transmission device includes: a deceleration device; and a case including a gear chamber provided with an accommodation chamber that accommodates the deceleration device therein, in which the deceleration device includes an input shaft whose rotation axis direction extends in a horizontal direction, and a deceleration mechanism configured to reduce power input from the input shaft, and a wall portion of the case is provided with a first storage portion configured to store a lubricating liquid for lubricating the deceleration device, the first storage portion being arranged above a rotation axis of the input shaft and below an upper end of the deceleration mechanism in an upper-lower direction, and arranged at a position where at least a part thereof overlaps the deceleration mechanism in an axial direction of the input shaft.

Claims24

Dependent claims

A power transmission device comprising:

a deceleration device;
and
a case including a gear chamber provided with an accommodation chamber that accommodates the deceleration device therein, wherein
the deceleration device includes
an input shaft whose rotation axis direction extends in a horizontal direction, and
a deceleration mechanism configured to reduce power input from the input shaft,
a wall portion of the case is provided with a first storage portion configured to store a lubricating liquid for lubricating the deceleration device, the first storage portion being arranged above a rotation axis of the input shaft and below an upper end of the deceleration mechanism in an upper-lower direction, and arranged at a position where at least a part thereof overlaps the deceleration mechanism in an axial direction of the input shaft,
the deceleration mechanism includes a planetary gear mechanism,
the lubricating liquid is stored in a lower portion of the accommodation chamber,
a lower portion of the planetary gear mechanism is immersed in the lubricating liquid stored in the lower portion of the accommodation chamber, and
a part of the lubricating liquid stored in the lower portion of the accommodation chamber is picked up by the planetary gear mechanism and stored in the first storage portion.

8 more elements

A power transmission device comprising:

a differential gear mechanism;
and
a case including a gear chamber provided with an accommodation chamber that accommodates the differential gear mechanism therein, wherein
the differential gear mechanism includes
a differential case whose rotation axis direction extends in a horizontal direction,
a wall portion of the case is provided with a second storage portion configured to store a lubricating liquid for lubricating the differential gear mechanism, the second storage portion being arranged above a rotation axis of the differential case and below an upper end of the differential case in an upper-lower direction, and arranged at a position where at least a part thereof overlaps the differential gear mechanism in an axial direction of the differential case,
the gear chamber is provided with a third storage portion below the second storage portion, the third storage portion being partitioned into a separate chamber from the accommodation chamber,
the second storage portion and the third storage portion are adjacent to each other in the upper-lower direction across a second partition wall, and
the second partition wall is provided with a second flow hole communicating the second storage portion with the third storage portion and configured to allow the lubricating liquid to flow.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/796,852Filed 7 Aug 2024
Priority: JP 2023-1288337 Aug 2023
Published: US 2025/0052315 A113 Feb 2025
Granted: 16 Jun 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

F16H 57/0423
On or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like: lubricant guiding means…
F16H 57/0479
Elements of gearings to be lubricated, cooled or heated: gears or bearings on planet carriers
B60K 11/02
Arrangement in connection with cooling of propulsion units: with liquid cooling
F16H 57/0417
Air cooling or ventilation; Heat exchangers; Thermal insulations: heat exchangers adapted or integrated in the gearing