Opening device

Abstract

An opening device has a drive motor with a motor shaft, an output axle for pivotably driving a member between a first position and a second position and a gear train connecting the motor shaft to the output axle. A gear case houses the gear train. The gear train has an output gear arranged to drive the output axle and the output axle is slidably received in a hole in the output gear. Thus the output axle can be assembled to the output gear or be disassembled from the output gear without disassembling the gear case. The gear case has at least one moveable baffle plate arranged to prevent the output axle from accidentally separating from the output gear once assembled.

1 . A opening device comprising: a drive motor having a motor shaft; an output axle for pivotably driving a member between a first position and a second position; a gear train connecting the motor shaft to the output axle; and a gear case for housing the gear train, the gear train being provided with an output gear to drive the output axle; wherein the output axle is connected to the gear case and the output gear by a live connection, whereby the output axis can be assembled to the output gear or be disassembled from the output gear without disassembling the gear case; and the outside of the gear case is provided with at least one moveable baffle plate arranged to prevent the output axle from separating from the output gear. 
   
   
       2 . The opening device of  claim 1 , wherein the output axle passes through a through hole in the gear case, and the moveable baffle plate is located adjacent the through hole; the moveable baffle plate being moveable between a first position extending over an end of the output axle to prevent the output axle from sliding through the through hole and a second position in which the movable baffle plate does not interfere with the output axle moving through the through hole. 
   
   
       3 . The opening device of  claim 1 , wherein the gear train comprises a first gear train set extending along the axial direction of the motor shaft, and a second gear train set extending transversely to the axis of the motor shaft; the first gear train set is connected to the motor shaft, and the second gear train set is connected to the output axis; the output axle being parallel to the motor shaft. 
   
   
       4 . The opening device of  claim 3 , wherein the second gear train set comprises an input gear driven by the first gear train set, the output gear for driving the output axle, and a duplex gear connected between the input gear and the output gear. 
   
   
       5 . The opening device of  claim 3 , wherein the first gear train set is a planetary gear train and comprises a sun gear fixed to the motor shaft, an internal gear, and at least one planet gear group meshing with the sun gear and the internal gear. 
   
   
       6 . The opening device of  claim 5 , wherein the planetary gear train has three stages. 
   
   
       7 . The opening device of  claim 1 , wherein the output axle has a through hole along its axis. 
   
   
       8 . An opening assembly comprising: a base having a mounting part; a movable member capable of pivoting relative to the base and having a coupling part; an opening device for driving the movable member between a first position and a second position, the opening device having a drive motor, an output axle for driving the movable member, and a gear train connecting a shaft of the drive motor to the output axle, the gear train having an output gear arranged to drive the output axis; a gear case for housing the gear train, the gear case being fixed to the base; wherein the output axle is connected to the gear case and the output gear by a live connection; the output axle being insertable into the coupling part of the cover when the coupling part is aligned with the mounting part of the base, the output axle passing through the gear casing, the output gear, the mounting part and the coupling part; and at least one movable baffle plate provided on the gear case to limit axial movement of the output axle with respect to the output gear after the output axle has been inserted into the coupling part of the movable member. 
   
   
       9 . The assembly of  claim 8 , further comprising a torsion spring; one end of the torsion spring being fixed to the base, and the other end being fixed to the cover or the output axle. 
   
   
       10 . The assembly of  claim 8 , wherein the base further comprises a second mounting part, and each mounting part is provided with a containing hole; the coupling part of the movable member is located between the two mounting parts of the base, and the coupling part of the movable member is provided with a coupling hole; the output axle being removably slidably received in the coupling hole of the coupling part and in a hole in the output gear whereby the output axle couples the output gear to the movable member for rotation therewith. 
   
   
       11 . The assembly of  claim 8 , wherein the gear train comprises a first gear train set which extends along the axis of the motor shaft, and a second gear train set which extends transversely to the axis of the motor shaft; the first gear train set being connected to the motor shaft, and the second gear train set comprises the output gear. 
   
   
       12 . An assembly according to  claim 11 , wherein the first gear train set is a planetary gear train and comprises a sun gear fixed to the motor shaft, an internal gear, and at least one planet gear group meshing with the sun gear and the internal gear. 
   
   
       13 . An assembly according to  claim 8 , wherein the planetary gear train has three stages.