Driving device, propeller and propulsion system

Abstract

A driving device includes a body portion, a driving shaft disposed on the body portion and configured to rotate relative to the body portion, a lock portion disposed on the body portion and including a snap-fitting portion configured to snap with the propeller, and an elastic abutting member disposed on the body portion and configured to be pressed down and deformed along a direction parallel to the driving shaft to abut against a propeller in response to the snap-fitting portion being snapped with the propeller.

What is claimed is: 
     
         1 . A driving device comprising:
 a body portion;   a driving shaft disposed on the body portion and configured to rotate relative to the body portion;   a lock portion disposed on the body portion and including a snap-fitting portion configured to snap with a propeller; and   an elastic abutting member disposed on the body portion and configured to be pressed down and deformed along a direction parallel to the driving shaft to abut against the propeller in response to the snap-fitting portion being snapped with the propeller.   
     
     
         2 . The driving device of  claim 1 , further comprising:
 a mounting base;   wherein the body portion is fixedly arranged at the mounting base.   
     
     
         3 . The driving device of  claim 2 , wherein the body portion includes a carrying surface away from the mounting base, and the carrying surface includes a round receiving groove. 
     
     
         4 . The driving device of  claim 3 , wherein the elastic abutting member includes:
 a connecting plate; and   a plurality of elastic abutting portions elastically bending relative to the connecting plate, received in the receiving groove, and configured to abut against the propeller in response to the snap-fitting portion being snapped with the propeller.   
     
     
         5 . The driving device of  claim 4 , wherein:
 a plurality of first mounting holes surrounding the driving shaft are provided at a bottom of the receiving groove, the first mounting holes being threaded holes;   the connecting plate includes a plurality of second mounting holes corresponding to the plurality of first mounting holes;   the lock portion includes a bottom plate including a plurality of third mounting holes corresponding to the plurality of first mounting holes; and   two bolts pass through the second mounting holes and the third mounting holes to be connected with the first mounting holes by threading to fix the elastic abutting member and the lock portion on the carrying surface.   
     
     
         6 . The driving device of  claim 5 , wherein
 the connecting plate includes a first through hole corresponding to the driving shaft;   the bottom plate includes a second through hole corresponding to the driving shaft; and   the first through hole and the second through hole are configured for the driving shaft to pass through.   
     
     
         7 . The driving device of  claim 4 , wherein a thickness of the connecting plate is about the same as a depth of the receiving groove. 
     
     
         8 . The driving device of  claim 4 , wherein the plurality of elastic abutting portions protrude beyond a surface of the connecting plate away from a bottom of the receiving groove. 
     
     
         9 . The driving device of  claim 8 , wherein the plurality of elastic abutting portions are equally spaced and evenly distributed on the surface of the connecting plate. 
     
     
         10 . The driving device of  claim 4 , wherein a shape and size of the connecting plate correspond to a shape and size of the receiving groove. 
     
     
         11 . The driving device of  claim 4 , wherein the plurality of elastic abutting portions are located at a periphery of the lock portion. 
     
     
         12 . The driving device of  claim 3 , wherein the elastic abutting member includes an elastic element disposed on the carrying surface. 
     
     
         13 . The driving device of  claim 12 , wherein the elastic element includes two or more springs. 
     
     
         14 . The driving device of  claim 12 , wherein the elastic element includes rubber. 
     
     
         15 . The driving device of  claim 3 , wherein the elastic abutting member and the lock portion are fixed on the carrying surface by adhesion or welding. 
     
     
         16 . The driving device of  claim 1 , wherein the lock portion includes an extension portion extending upwards along a direction perpendicular to a bottom plate of the lock portion, and the snap-fitting portion is disposed on the extension portion. 
     
     
         17 . The driving device of  claim 12 , wherein the extension portion further includes at least two notches. 
     
     
         18 . The driving device of  claim 12 , wherein the snap-fitting portion includes an arc-shaped snapping block extending along an outer side surface of the extension portion. 
     
     
         19 . The driving device of  claim 1 , wherein the body portion is cylindrical. 
     
     
         20 . The driving device of  claim 1 , wherein the driving shaft protrudes beyond a center position of the body portion.