Direct drive system for passenger conveyer device and passenger conveyer device
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.
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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.
12. 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.
13. 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.
14. The direct-drive system according to claim 1 , characterized in that the gear box is at least partially borne by the main drive shaft.
15. The direct-drive system according to claim 14 , characterized in that output end of the gear box is borne by the main drive shaft.
16. 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.
17. 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.
18. 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.
19. 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.
20. 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.
21. 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.
22. 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.