# US 2024/0200633 A1 · Flywheel housing and engine equipped with flywheel housing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0200633 A1 - Document ID: US20240200633A1 - Status: Published application - Kind: A1 - Application number: 18/491,012 - Filed: 2023-10-20 - Published: 2024-06-20 - Earliest claimed: 2022-12-19 - Assignees: Kubota Corporation - Applicants: Kubota Corporation - Inventors: Mariko Ban; Yuichi Tamaki; Tomohiro Sato; Masato Ueda; Noriyoshi Eguchi - Web page: https://patentgrep.com/patent/US20240200633A1 ## CPC - F16F 15/315: characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft (F16F15/31 takes precedence) - F16F 15/14: using masses freely rotating with the system, {i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers (compensation of inertia forces F16F15/22; weights for balancing rotating bodies F16F15/32)} - F16F 15/30: Flywheels (F16F15/16, F16F15/28 take precedence; suppression of vibrations in rotating systems using elastic members or friction-damping members moving with the system, {i.e. split flywheels or single masses connected to a hub by elastic members or friction-damping members} F16F15/12; rotary-body aspects in general F16C13/00, F16C15/00) - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract A flywheel housing 100 includes: a main body portion 110 which is arranged on a side of an engine 1 of a flywheel 20 and which has a housing portion 111 that houses the flywheel 20; and a cover portion 120 which is arranged on an opposite side of the flywheel 20 to the engine 1, and which is connected to the main body portion 110, and moreover which has an opening portion 125 with an inner diameter that is smaller than an outer diameter of the flywheel 20, wherein the cover portion 120 is provided with a recessed portion 123 that is recessed in a direction of separation from the flywheel 20 on an opposing surface 122b to the flywheel 20 in a peripheral portion of an edge of the opening portion 125. ## Claims ### Claim 1 A flywheel housing that houses a flywheel coupled to an output shaft of an engine, the flywheel housing comprising: a main body portion which is arranged on the engine side of the flywheel and which has a housing portion that houses the flywheel; and a cover portion which is arranged on an opposite side of the flywheel to the engine, and which is connected to the main body portion, and moreover which has an opening portion with an inner diameter that is smaller than an outer diameter of the flywheel, wherein the cover portion is provided with a recessed portion that is recessed in a direction of separation from the flywheel on an opposing surface to the flywheel in a peripheral portion of an edge of the opening portion. ### Claim 2 (depends on 1) The flywheel housing according to claim 1, wherein the edge of the opening portion is positioned on a bottom surface of the recessed portion. ### Claim 3 (depends on 1) The flywheel housing according to claim 1, wherein a curved surface is provided between a side surface and the bottom surface of the recessed portion. ### Claim 4 (depends on 1) The flywheel housing according to claim 1, wherein a curved surface is provided between adjacent side surfaces of the recessed portion. ### Claim 5 (depends on 1) The flywheel housing according to claim 1, wherein the opposing surface is provided with a plurality of the recessed portions on a circumference in a periphery of the opening portion and a rib is provided between the plurality of adjacent recessed portions. ### Claim 6 (depends on 5) The flywheel housing according to claim 5, wherein a surface between an outer surface of the rib and the bottom surface of the recessed portion is a curved surface. ### Claim 7 (depends on 5) The flywheel housing according to claim 5, wherein a tip in an extending direction of the rib is positioned on the edge of the opening portion. ### Claim 8 (depends on 5) The flywheel housing according to claim 5, wherein a width of the rib becomes narrower in an extending direction. ### Claim 9 (depends on 1) The flywheel housing according to claim 1, wherein the main body portion has a support portion which is provided on an upper part of the main body portion and which supports another member, and the support portion includes a foundation portion which extends upward from the upper part of the main body portion, and a pedestal portion which is provided on top of the foundation portion and which extends to a side of the cover portion while avoiding the cover portion. ### Claim 10 (depends on 9) The flywheel housing according to claim 9, wherein a tip in the extending direction of the pedestal portion is positioned closer to a side of a front surface of the cover portion than a junction surface between the main body portion and the cover portion and closer to a side of the main body portion than the front surface of the cover portion. ### Claim 11 (depends on 9) The flywheel housing according to claim 9, wherein the support portion has a reinforcing rib that is connected to at least the foundation portion. ### Claim 12 (depends on 11) The flywheel housing according to claim 11, wherein the reinforcing rib is inclined, from the foundation portion toward the pedestal portion, in a direction of separation from a hoisting hook that is connected to the engine. ### Claim 13 (depends on 9) The flywheel housing according to claim 9, wherein the engine and a member connected to the engine are not provided at positions that overlap with an upper surface of the pedestal portion when viewed from above the engine. ### Claim 14 (depends on 9) The flywheel housing according to claim 9, wherein the pedestal portion is provided at a position separated from a hoisting hook that is connected to the engine when viewed from above the engine. ### Claim 15 (depends on 9) The flywheel housing according to claim 9, comprising two of the support portions, wherein the two support portions are provided at symmetrical positions with respect to the output shaft when viewed from above the engine. ### Claim 16 (depends on 9) The flywheel housing according to claim 9, wherein the support portion is provided at a position that overlaps with the output shaft when viewed from above the engine. ### Claim 17 An engine equipped with a flywheel housing that houses a flywheel coupled to an output shaft of the engine, the flywheel housing including: a main body portion which is arranged on the engine side of the flywheel and which has a housing portion that houses the flywheel; and a cover portion which is arranged on an opposite side of the flywheel to the engine, and which is connected to the main body portion, and moreover which has an opening portion with an inner diameter that is smaller than an outer diameter of the flywheel, wherein the cover portion is provided with a recessed portion that is recessed in a direction of separation from the flywheel on an opposing surface to the flywheel in a peripheral portion of an edge of the opening portion. ### Claim 18 (depends on 17) The engine according to claim 17, wherein the main body portion has a support portion which is provided on an upper part of the main body portion and which supports another member, and the support portion includes a foundation portion which extends upward from the upper part of the main body portion, and a pedestal portion which is provided on top of the foundation portion and which extends to a side of the cover portion while avoiding the cover portion.