US 2026/0210412 A1Published application

Friction disc, multiplate clutch, transmission, and work machine

AssigneeKomatsu Ltd.

InventorKyoshiro KANAMORI

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Abstract

A friction disc includes a lubricating oil groove including a plurality of first and second groove paths. Each first groove path includes a first inlet disposed on an inner peripheral edge side, a first outlet disposed on an outer peripheral edge side, and a first A groove portion formed from the first inlet and inclined to a first circumferential direction side in the circumferential direction relative to a radial direction. Each second groove path includes a second inlet disposed on the inner peripheral edge side, is inclined to a second circumferential direction side opposite to the first circumferential direction relative to the radial direction, and joins the first A groove portion. A joining portion where the second groove path joins the first A groove portion forms a three-way junction, and is disposed closer to the first inlet between the first inlet and the first outlet of the first groove path.

Claims20

Dependent claims

A friction disc used in a power transmission device, the friction disc comprising:

a lubricating oil groove through which lubricating oil passes, the lubricating oil groove including
a plurality of first groove paths formed in a surface side by side in a circumferential direction, and
a plurality of second groove paths formed in the surface side by side in the circumferential direction,
each of the first groove paths including
a first inlet disposed on an inner peripheral edge side and into which the lubricating oil flows,
a first outlet disposed on an outer peripheral edge side and from which the lubricating oil flows out, and
a first A groove portion formed from the first inlet and inclined to a first circumferential direction side in the circumferential direction with respect to a radial direction,
each of the second groove paths
including a second inlet that is disposed on the inner peripheral edge side and into which the lubricating oil flows,
being inclined to a second circumferential direction side opposite to the first circumferential direction with respect to the radial direction, and
joining the first A groove portion, and
a joining portion where the second groove path joins the first A groove portion forming a three-way junction, and being disposed closer to the first inlet between the first inlet and the first outlet of the first groove path.

9 more elements

A friction disc used in a power transmission device, the friction disc comprising:

a lubricating oil groove through which lubricating oil passes, the lubricating oil groove including
a plurality of third groove paths formed in a surface side by side in a circumferential direction, and
a plurality of fourth groove paths formed in the surface side by side in the circumferential direction,
each of the third groove paths including
a third inlet disposed on an inner peripheral edge side and into which the lubricating oil flows,
a second outlet disposed on an outer peripheral edge side and from which the lubricating oil flows out, and
a third A groove portion formed from the third inlet and inclined to a second circumferential direction side in the circumferential direction with respect to a radial direction,
each of the fourth groove paths
branching from the third A groove portion, and
being inclined to a first circumferential direction side opposite to the second circumferential direction with respect to the radial direction, and
a branching portion where the fourth groove path branches from the third A groove portion forming a three-way junction, and being disposed closer to the third inlet between the third inlet and the second outlet of the third groove path.

8 more elements

Dependencies are inferred from the claim text.