# US 10,118,801 B2 · Direct drive system for passenger conveyer device and passenger conveyer device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,118,801 B2 - Document ID: US10118801B2 - Status: Granted - Kind: B2 - Application number: 15/800,827 - Filed: 2017-11-01 - Published: 2018-05-03 - Granted: 2018-11-06 - Earliest claimed: 2016-11-03 - Assignees: Otis Elevator Company - Applicants: Otis Elevator Company - Inventors: Jiangxing Huang; Fengshu Yue; Shimao Chen; Jie Hu; Jianguo Li; Hongmin Zhu; Jianye Yang; Jiawei Wu; Bingyin Cheng; Jinqi Yang; Yunyun Zhao - Web page: https://patentgrep.com/patent/US10118801B2 ## CPC - B66B 23/026: {with a drive or carrying sprocket wheel located at end portions} - B65G 23/24: Gearing between driving motor and belt- or chain-engaging elements (contained in drums, rollers or wheels B65G23/08) - B66B 23/02: Driving gear - F16H 1/08: the members having helical, herringbone, or like teeth - B66B: ELEVATORS; ESCALATORS OR MOVING WALKWAYS ({apparatus for raising or lowering persons on theatrical stages or the like A63J5/12} ; funicular railbound systems with rigid ground-supported tracks and cable traction, e.g. cliff railways, B61B9/00; arrangements of ammunition handlers in vessels B63G3/00; hoists, lifts, or conveyors for loading or unloading in general B65G; braking or detent devices controlling normal movements of winding drums or barrels B66D; ship-lifting devices E02C; garages for many vehicles with mechanical means for lifting vehicles E04H6/12; hoists for feeding ammunition or projectiles to launching apparatus or to loading mechanisms F41A9/00) - B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D) - F16H: GEARING ## Abstract A direct-drive system for a passenger transportation apparatus, and a passenger transportation apparatus having same. The direct-drive system comprises: a motor comprising a motor output shaft, for providing power; a main drive shaft for transmitting the power to a passenger transportation portion of the passenger transportation apparatus; and a gear box comprising an input end connected to the motor output shaft and an output end connected to the main drive shaft respectively, and being used for transmitting the power, provided by the motor, to the main drive shaft, wherein the gear box comprises a plurality of gear pairs, and each of the gear pairs has a progressively decreasing gear slope along the direction from the input end of the gear box to the output end thereof. ## Claims ### Claim 1 A direct-drive system for a passenger transportation apparatus, characterized by comprising: a motor comprising a motor output shaft, for providing power; a main drive shaft for transmitting the power to a passenger transportation portion of the passenger transportation apparatus; and a gear box comprising an input end connected to the motor output shaft and an output end connected to the main drive shaft respectively, and being used for transmitting the power, provided by the motor, to the main drive shaft, wherein the gear box is a plurality of gear pairs, and each of the gear pairs has progressively decreasing gear slope along the direction from the input end of the gear box to the output end thereof, and wherein the gear box is parallel-axis gearbox, and the parallel-axis gear box comprises three or four gear pairs. ### Claim 2 (depends on 1) The direct-drive system according to claim 1, characterized in that a gear pair connected to the output end of the gear box is a spur gear pair. ### Claim 3 (depends on 1) The direct-drive system according to claim 1 , characterized in that a first output gear mating with the input end of the gear box is arranged on the motor output shaft, and the gear box comprises, from the input end to the output end, at least one duplicate gear and a second output gear successively, wherein the number of teeth of the duplicate gear is greater than that of the first output gear, and the number of teeth of the duplicate gear is smaller than that of the second output gear, and/or when a plurality of duplicate gears are included, the number of teeth of a driving duplicate gear is smaller than that of a driven duplicate gear. ### Claim 4 (depends on 3) The direct-drive system according to claim 3, characterized in that the duplicate gear comprises a first gear and a second gear linked to each other, wherein the first gear is driven and the second gear is in linkage therewith, and the number of teeth of the first gear is greater than that of the second gear. ### Claim 5 (depends on 1) The direct-drive system according to claim 1 , characterized in that a first output gear mating with the input end of the gear box is arranged on the motor output shaft, and the gear box comprises, from the input end to the output end, a first duplicate gear, a second duplicate gear and a second output gear successively. ### Claim 6 (depends on 5) The direct-drive system according to claim 5, characterized in that the first duplicate gear comprises a first helical gear and a second helical gear, wherein the first helical gear meshes with the first output gear on the motor output shaft, and the second helical gear meshes with the second duplicate gear. ### Claim 7 (depends on 6) The direct-drive system according to claim 6, characterized in that the diameter of the first helical gear is greater than the diameter of the second helical gear. ### Claim 8 (depends on 5) The direct-drive system according to claim 5, characterized by comprising: the second duplicate gear comprises a third helical gear and a fourth spur gear, wherein the third helical gear meshes with the first duplicate gear, and the fourth spur gear meshes with the second output gear. ### Claim 9 (depends on 8) The direct-drive system according to claim 8, characterized in that the diameter of the third helical gear is greater than the diameter of the fourth spur gear. ### Claim 10 (depends on 5) The direct-drive system according to claim 5, characterized by comprising: the second output gear comprises a fifth spur gear and a power output portion, wherein the fifth spur gear meshes with the second duplicate gear, and the power output portion meshes with the main drive shaft. ### Claim 11 (depends on 8) The direct-drive system according to claim 8, characterized in that the first duplicate gear constitutes a first gear pair with the first output gear on the motor output shaft, and the first duplicate gear constitutes a second gear pair with the third helical gear, wherein the gear slope of the first gear pair is greater than that of the second gear pair. ### Claim 12 (depends on 10) The direct-drive system according to claim 10, characterized by comprising: the main drive shaft is connected to the power output portion of the second output gear through a spline fit. ### Claim 13 (depends on 12) The direct-drive system according to claim 12, characterized by comprising: an outer spline arranged close to a first end of the main drive shaft; and an inner spline mating therewith, which is arranged running through the gear box along the axis of the second output gear. ### Claim 14 (depends on 1) The direct-drive system according to claim 1, characterized in that the gear box is at least partially borne by the main drive shaft. ### Claim 15 (depends on 14) The direct-drive system according to claim 14, characterized in that output end of the gear box is borne by the main drive shaft. ### Claim 16 (depends on 15) The direct-drive system according to claim 15, characterized by comprising: the gear box further comprises a bearing support arranged close to the input end, and the gear box is connected to a bearing seat on a truss of the passenger transportation apparatus by means of the bearing support; and the gear box is partially borne by the truss. ### Claim 17 (depends on 16) The direct-drive system according to claim 16, characterized in that an end of the bearing support and of the bearing seat are respectively provided with a joint bearing and a joint bearing saddle mating with each other. ### Claim 18 (depends on 1) The direct-drive system according to claim 1, characterized in that the motor and a second end of the main drive shaft are arranged at the same side of the gear box. ### Claim 19 (depends on 14) A passenger transportation apparatus, characterized by comprising a direct-drive system as claimed in claim 14, and a truss, wherein the first end and second end of the main drive shaft is connected to the truss in a rotatable manner. ### Claim 20 (depends on 19) The passenger transportation apparatus according to claim 19, characterized by further comprising a bearing base, the first end and second end of the main drive shaft are fixed to the truss via the bearing base, and the main drive shaft rotates about the bearing base. ### Claim 21 (depends on 19) The passenger transportation apparatus according to claim 19, characterized by further comprising a drive sprocket arranged on the main drive shaft, and the output end of the gear box is connected to the main drive shaft at an outer side of the drive sprocket. ### Claim 22 (depends on 19) The passenger transportation apparatus according to claim 19, characterized in that the first end of the main drive shaft is connected to the truss by running through the output end of the gear box.