Lubricating fluid supply structure of power transmission device

Inventors: Hiroyuki Kita (Saitama, JP); Kazuaki Watanabe (Saitama, JP); Naomichi Tonokura (Saitama, JP); Junichi Yamaguchi (Tochigi, JP)

Assignee: Honda Motor Co., Ltd.

F16H57/0445 F16H57/0423 F16H57/0424 F16H57/0435 F16H57/0471 F16H57/0483 F16H3/66 F16H2200/0069 F16H2200/2012 F16H2200/2046 F16H2200/2048 F16H2200/2066 F16H2200/2082

View Patent ↗

Loading inventors, assignments & file history…

Monitor This Case

Get email alerts when status or documents change.

Order Certified Copies

Most orders are placed with the USPTO same day — all within 24 business hours.

Order via The Patent Place →

Pre-filled with this patent's details

Quick Facts

Patent No.: US 10,920,871
App. No.: 15/928,099
Granted: Feb 16, 2021
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

Provided is a lubricating fluid supply structure of a power transmission device capable of stably supplying a lubricating fluid to a built-in part to which the lubricating fluid is supplied with a high priority. A supply pipe ( 64 a ) includes a first main pipe line (L 1 ) connected to a priority part, a second main pipe line (L 2 ) connected to a non-priority part, and an intermediate pipe line (LM) connecting the first main pipe line (L 1 ) and the second main pipe line (L 2 ) to each other. A first height (H 1 ) of a connection part of the first main pipe line (L 1 ) connected to the intermediate pipe line (LM) is lower than a second height (H 2 ) located at the highest position in a flow path bottom surface of the intermediate pipe line (LM).

Claims (30)

1. A lubricating fluid supply structure of a power transmission device for supplying a lubricating fluid to a plurality of built-in parts disposed inside a case of the power transmission device through a supply pipe,

wherein the supply pipe includes a first main pipe line, an intermediate pipe line connected to the first main pipe line, and a second main pipe line connected to the intermediate pipe line,

wherein the first main pipe line is connected to a priority part to which the lubricating fluid is supplied with high priority among the plurality of built-in parts such that a supply of the lubricating fluid to the priority part of the power transmission device is maintained even when a flow rate of the lubricating fluid in the supply pipe becomes small,

wherein the second main pipe line is connected to a non-priority part to which the lubricating fluid is supplied with low priority among the plurality of built-in parts such that a supply of the lubricating fluid to the non-priority part of the power transmission device is suppressed when the flow rate of the lubricating fluid in the supply pipe becomes small,

wherein a connection part is formed at a junction between the first main pipe line and the intermediate pipe line, and a flow path bottom surface of the connection part is lower than a surface located at a highest position of a flow path bottom surface of the intermediate pipe line,

wherein an orifice is provided in the intermediate pipe line,

wherein a branch pipe line connected to the non-priority part is provided in the second main pipe line, and

wherein a cross-sectional area of the orifice is set to be larger than a sum of a minimal cross-sectional area of the second main pipe line and a minimal cross-sectional area of the branch pipe line.

2. The lubricating fluid supply structure of the power transmission device according to claim 1 ,

wherein an angle formed between the first main pipe line and the intermediate pipe line is smaller than an angle formed between an upstream portion of the first main pipe line in relation to the connection part between the first main pipe line and the intermediate pipe line and a downstream portion of the first main pipe line in relation to the connection part.

3. The lubricating fluid supply structure of the power transmission device according to claim 2 ,

wherein the downstream portion of the first main pipe line in relation to the connection part between the first main pipe line and the intermediate pipe line extends linearly with respect to the upstream portion of the first main pipe line in relation to the connection part.

4. The lubricating fluid supply structure of the power transmission device according to claim 3 ,

wherein a part of the intermediate pipe line connected to the first main pipe line extends upward rather than in a horizontal direction.

5. The lubricating fluid supply structure of the power transmission device according to claim 4 ,