Built-in speed-shifting mechanism of medical care assistive device for being coupled to vehicle wheels to generate different power transmission paths according to the requirement of an operator so as to drive the vehicle wheels to move in various terrains

• Main Authors: GUO, ZI-WEI, WU, YI-ZHANG, LIN, CONG-YI
• Format: Patent
• Language: Chinese; English
• Published: 01.02.2019
• Subjects: BLASTING; CHAIRS FOR DENTISTRY; ENGINEERING ELEMENTS AND UNITS; FUNERAL DEVICES; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HUMAN NECESSITIES; HYGIENE; LIGHTING; MECHANICAL ENGINEERING; MEDICAL OR VETERINARY SCIENCE; OPERATING TABLES OR CHAIRS; THERMAL INSULATION IN GENERAL; TRANSPORT OR ACCOMODATION FOR PATIENTS; WEAPONS

The present invention discloses a built-in speed-shifting mechanism of medical care assistive device, which includes a main shaft body, a speed-adjusting shaft, a driving shaft and a ring gear. By controlling the rotation of the speed-adjusting shaft, a plurality of driving/fixed clutches correspondingly installed are configured in an engaged or a disengaged state, so as to determine whether the action of the driving/fixed clutches achieves a plurality of gear shifts. The speed-shifting mechanism of the present invention can be coupled to vehicle wheels to generate different power transmission paths (such as high gear, direct drive gear, neutral gear, reverse gear, etc.) according to the requirement of an operator, so as to drive the vehicle wheels to move in various terrains. In addition, all of said components are designed inside a casing (hub), and thus they are not easily affected by external environmental factors (such as external force collision, dust contamination, environmental moisture, etc.), thereb