# US 2017/0282965 A1 · Motive power transmission mechanism and steering device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282965 A1 - Document ID: US20170282965A1 - Status: Published application - Kind: A1 - Application number: 15/465,129 - Filed: 2017-03-21 - Published: 2017-10-05 - Earliest claimed: 2016-03-29 - Assignees: Showa Corporation - Applicants: Showa Corporation - Inventors: Shinsuke SEKIKAWA - Web page: https://patentgrep.com/patent/US20170282965A1 ## CPC - B62D 5/0403: {characterised by constructional features, e.g. common housing for motor and gear box} - B62D 5/0424: {the axes of motor and final driven element of steering gear, e.g. rack, being parallel} - B62D 5/0448: {Ball nuts} - F16H 7/02: with belts; with V-belts - B62D 5/001: {Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup} - F16H 25/2204: {with balls} - F16H 2025/2081: {Parallel arrangement of drive motor to screw axis} - F16H 2025/2096: {using endless flexible members} - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - F16H: GEARING ## Abstract A motive power transmission mechanism includes a motor, a drive pulley, a driven pulley, a belt, a housing, and a cap. The motor includes an output shaft and a motor main body. The drive pulley is configured to rotate together with the output shaft. The belt is wound across the drive pulley and the driven pulley to transmit torque from the drive pulley to the driven pulley. The housing accommodates the drive pulley, the belt, and the driven pulley. The housing includes a work window which faces the belt and through which the belt undergoes work from outside of the housing. The cap is configured to close the work window when the work is not performed. The cap includes a porous portion having air-permeability and water-impermeability. ## Claims ### Claim 1 A motive power transmission mechanism comprising: a motor comprising: an output shaft; and a motor main body; a drive pulley configured to rotate together with the output shaft; a driven pulley; a belt wound across the drive pulley and the driven pulley to transmit torque from the drive pulley to the driven pulley; a housing accommodating the drive pulley, the belt, and the driven pulley, the housing comprising a work window which faces the belt and through which the belt undergoes work from outside of the housing; and a cap configured to close the work window when the work is not performed, the cap comprising a porous portion comprising air-permeability and water-impermeability. ### Claim 2 (depends on 1) The motive power transmission mechanism according to claim 1, further comprising: a wheel-turning shaft movable in an axial direction of the wheel-turning shaft to turn wheels; and a conversion mechanism configured to convert rotation of the driven pulley into movement of the wheel-turning shaft in the axial direction of the wheel-turning shaft, wherein the housing accommodates a part of the wheel-turning shaft and a part of the conversion mechanism. ### Claim 3 (depends on 1) The motive power transmission mechanism according to claim 1, wherein the work window faces a position where the belt is wound on the drive pulley or the driven pulley, and wherein the work comprises checking how the belt is wound on the drive pulley or the driven pulley. ### Claim 4 (depends on 1) The motive power transmission mechanism according to claim 1, wherein the work window faces a position where the belt is wound on the drive pulley or the driven pulley, and wherein the work comprises winding the belt on the drive pulley or the driven pulley. ### Claim 5 (depends on 1) The motive power transmission mechanism according to claim 1, wherein the work window is opposed to a surface of the belt wound across the drive pulley and the driven pulley, and wherein the work comprises checking tension of the belt. ### Claim 6 (depends on 1) The motive power transmission mechanism according to claim 1, wherein the cap comprises a cap main body comprising a through hole, and the porous portion inserted in the through hole. ### Claim 7 (depends on 6) The motive power transmission mechanism according to claim 6, wherein the porous portion comprises a cover portion configured to cover the through hole, and a fitting portion fittable in the through hole. ### Claim 8 (depends on 6) The motive power transmission mechanism according to claim 6, wherein the cap main body comprises a threaded portion screwable into the housing, and a recess which is fittable to a tool to rotate the cap main body and in which the through hole is disposed. ### Claim 9 (depends on 1) The motive power transmission mechanism according to claim 1, wherein the porous portion comprises porous polytetrafluoroethylene. ### Claim 10 A steering device comprising a motive power transmission mechanism, the motive power transmission mechanism comprising: a motor comprising: an output shaft; and a motor main body; a drive pulley configured to rotate together with the output shaft; a driven pulley; a belt wound across the drive pulley and the driven pulley to transmit torque from the drive pulley to the driven pulley; a housing accommodating the drive pulley, the belt, and the driven pulley, the housing comprising a work window which faces the belt and through which the belt undergoes work from outside of the housing; and a cap configured to close the work window when the work is not performed, the cap comprising a porous portion comprising air-permeability and water-impermeability. ### Claim 11 (depends on 2) The motive power transmission mechanism according to claim 2, wherein the work window faces a position where the belt is wound on the drive pulley or the driven pulley, and wherein the work comprises checking how the belt is wound on the drive pulley or the driven pulley. ### Claim 12 (depends on 2) The motive power transmission mechanism according to claim 2, wherein the work window faces a position where the belt is wound on the drive pulley or the driven pulley, and wherein the work comprises winding the belt on the drive pulley or the driven pulley. ### Claim 13 (depends on 2) The motive power transmission mechanism according to claim 2, wherein the work window is opposed to a surface of the belt wound across the drive pulley and the driven pulley, and wherein the work comprises checking tension of the belt. ### Claim 14 (depends on 2) The motive power transmission mechanism according to claim 2, wherein the cap comprises a cap main body comprising a through hole, and the porous portion inserted in the through hole. ### Claim 15 (depends on 3) The motive power transmission mechanism according to claim 3, wherein the cap comprises a cap main body comprising a through hole, and the porous portion inserted in the through hole. ### Claim 16 (depends on 4) The motive power transmission mechanism according to claim 4, wherein the cap comprises a cap main body comprising a through hole, and the porous portion inserted in the through hole. ### Claim 17 (depends on 5) The motive power transmission mechanism according to claim 5, wherein the cap comprises a cap main body comprising a through hole, and the porous portion inserted in the through hole. ### Claim 18 (depends on 11) The motive power transmission mechanism according to claim 11, wherein the cap comprises a cap main body comprising a through hole, and the porous portion inserted in the through hole. ### Claim 19 (depends on 12) The motive power transmission mechanism according to claim 12, wherein the cap comprises a cap main body comprising a through hole, and the porous portion inserted in the through hole. ### Claim 20 (depends on 13) The motive power transmission mechanism according to claim 13, wherein the cap comprises a cap main body comprising a through hole, and the porous portion inserted in the through hole.