Conveying apparatus for ascending or descending stairways

• US 6,550,787 B1
• Filed: 12/28/2001
• Issued: 04/22/2003
• Est. Priority Date: 12/28/2001
• Status: Expired due to Fees

• Current Assignee: Aerospace Industrial Development Corp.
• Original Assignee: Aerospace Industrial Development Corp.
• Inventors: Yan, Hong-Sen, Chu, Chia-Chun, Juang, Puu-An
• Primary Examiner(s): BOEHLER, ANNE MARIE M
• Application Number:
  US10/029,296
• Time in Patent Office: 480 Days
• Field of Search: 280/5.26, 280/5.28, 280/5.2, 280/DIG.10, 180/907, 180/8.2, 180/8.3, 180/901
• US Class Current: 280/5.28
• CPC Class Codes: A61G 5/027 by using auxiliary detachable mechanisms
• CPC Class Codes: A61G 5/061 for climbing stairs
• CPC Class Codes: A61G 5/063 with eccentrically mounted wheels
• CPC Class Codes: B62B 5/028 with excentrically mounted wheels
• CPC Class Codes: Y10S 280/10 Stair climbing chairs

Abstract

A conveying apparatus capable of ascending or descending stairways and carrying goods consists of a frame, a transmission mechanism and a driving mechanism located on a lower section of the frame. The transmission mechanism includes a planetary gear set and is with two degrees of freedom. When moving on the floor, the driving mechanism may drive a driving wheel in the transmission mechanism to deliver output of the conveying apparatus based on floor conditions, thereby to ascend or descend the stairways, or moving on the plain floor.

Claims

1. A conveying apparatus for ascending or descending stairways, comprising:

a frame having an upper section with a pair of handles located thereon, and

a transmission mechanism located on a lower section of the frame including a sun gear set, a planetary gear set, a driving wheel, a second gear set and a carrier, the sun gear set including a sun gear spindle, a sun gear mounting on the periphery of the sun gear spindle and a pair of first gears, the sun gear spindle being turnable about the frame, the planetary gear set being located on the periphery of the sun gear and including a plurality of planetary gears meshing with the sun gear, the driving wheel being a ring gear rotating about the sun gear spindle and meshing with the planetary gears, the second gear set including two sets of second gears, each set of second gears being on a periphery of each first gear for meshing respectively with the corresponding first gear, each of the second gears driving a wheel to rotate, the carrier being pivotally mounted on the sun gear spindle and driving spindles of the planetary gears and the second gears rotating about the sun gear spindle which serves as the axis of rotation, the carrier including a casing and two pairs of connection plates, the casing having window openings formed on the periphery thereof corresponding to the number of the planetary gears to accommodate the planetary gears for meshing with the sun gear; and

wherein the driving mechanism drives the driving wheel to move the conveying apparatus ascending or descending the stairways, or running on plain floors.

2. A conveying apparatus for ascending or descending stairways, comprising:

a frame having an upper section with a pair of handles located thereon, and

a transmission mechanism located on a lower section of the frame including a sun gear set, a planetary gear set, a driving wheel, a second gear set and a carrier, the sun gear set including a sun gear spindle, a sun gear mounting on the periphery of the sun gear spindle and a pair of first gears, the sun gear spindle being turnable about the frame, the frame includes a bottom section having two anchor openings formed with a diameter larger than the outer diameter of a casing of the carrier, the casing of the carrier being housed in the anchor openings and having a bearing located between the casing and the anchor openings to allow the casing to rotate in the anchor openings, the planetary gear set being located on the periphery of the sun gear and including a plurality of planetary gears meshing with the sun gear, the driving wheel being a ring gear rotating about the sun gear spindle and meshing with the planetary gears, the second gear set including two sets of second gears, each set of second gears being on a periphery of each first gear for meshing respectively with the corresponding first gear, each of the second gears driving a wheel to rotate, the carrier being pivotally mounted on the sun gear spindle and driving spindles of the planetary gears and the second gears rotating about the sun gear spindle which serves as the axis of rotation; and

wherein the driving mechanism drives the driving wheel to move the conveying apparatus ascending or descending the stairways, or running on plain floors.