Patent Application
20100279806
The present invention relates to a tail rotor transmission structure of a model helicopter, and more particularly to a transmission structure improvement for bending a tail pipe.
A usual model helicopter, as shown in
In order to improve the yaw of the body in flight of the above model helicopter, the professional players would alter the tail rotor portion of the model helicopter by themselves. They mount an upwardly tilted tailstock on the tail pipe of the model helicopter, and then install the tail rotor set on the tailstock, such that the tail rotor set and the main rotor set are located on the same horizontal plane, whereby the thrust generated by the tail rotor set would be balanced off by the torsion generated by the main rotor set so as to avoid the yaw of the body in flight of a model helicopter. Nevertheless, since the tailstock is made by jointing together a left and right cover plates in way of such self-alteration, the fact that the cover plates are unable to be fixed in advance would leads to the difficulty in assembly. If operators were inclined to adjust or replace the components of the transmission structure inside the tailstock, it would be very inconvenient due to the sagging and separation of the transmission structure inside the tailstock when the tailstock disassembled by the operators.
The primary objective of the present invention is to provide a transmission structure improvement for bending a tail pipe, which has the advantage of rapid assembly.
The secondary objective of the present invention is to provide a transmission structure improvement for bending a tail pipe. When the operators intend to adjust or replace the transmission structure for bending a tail pipe, it is very simple and easy to do that.
To achieve the foregoing objectives, the present invention provides a transmission structure improvement for bending a tail pipe, which is installed at the tail pipe of a model helicopter, the transmission structure for bending a tail pipe comprising: a main body, having a containing space therein, a plurality of holders disposed in the containing space for installing a driving member, an opening disposed at the main body, such that the containing space communicates with the exterior of the main body through the opening, one end of the main body having a first attachment end and the other end having a second attachment end, and the second attachment end bending at a bend angle relative to the first attachment end and a plurality of first connecting portions disposed at the main body; and a side panel, having a plurality of second connecting portions, and the second connecting portions and the first connecting portions corresponding to and engaged with each other, such that the side panel is mounted at the opening.
First of all, referring to
The main body 11 is a hollow shell structure, having a containing space 12 therein. Two holders 13 are convexly disposed in the containing space 12, and the holders 13 are provided for installing a driving member 14 (in this embodiment, it is a pulley structure) respectively. An opening 15 is disposed at the main body 11, such that the containing space 12 of the main body 11 communicates with the exterior of the main body 11 through the opening 15. One end of the main body 11 has a first attachment end 16 and the first attachment end 16 is tubular, such that the containing space 12 of the main body 11 communicates with the exterior space of the one end of the main body 11. The other end has a second attachment end 17 and the second attachment end 17 is tubular as same as the first attachment end, such that the containing space 12 of the main body 11 communicates with the exterior space of the other end of the main body 11. Besides, the second attachment end 17 bends at a bend angle a relative to the first attachment end 16, and three first connecting portions 18 are disposed in the containing space 12 of the main body 11, each of the first connecting portions 18 having a screw hole 19 respectively.
The side panel 21, whose contour corresponds to the shape of the opening 15 of the main body 11, such that the side panel 21 can precisely cover and match the opening 15 of the main body 11, and the side panel 21 has three second connecting portions 22. Each of the second connecting portions 22 is corresponsive with each of the first connecting portions 18 and has a through hole 24 respectively. After each of the first connecting portions 18 and each of the second connecting portions 22 correspond to and match each other, they are screwed and fixed by passing a screw 26 through the through hole 24 and the screw hole 19, such that the side panel 21 is mounted at the opening 15 of the main body 11.
Next, referring to
The second attachment end 17 has a bend angle a relative to the first attachment end 16, and therefore, when the transmission belt 52 passes through the tail pipe 51 entering the transmission structure 10 for bending a tail pipe according to the present invention, the transmission belt 52 is guided by the pulleys 14, such that the transmission belt 52 is bent upward and goes out of the second attachment end 17. Subsequently, the transmission belt 52 is further linked to the tail rotor set 61, whereby the tail rotor set 61 and the main rotor set 71 are located on the same horizontal plane, as shown in
However, here it must be particularly specified that the driving member 14 described in the above embodiment is a pulley structure, but all the driving members should be considered as the equivalent embodiments of the present invention as long as the driving members 14 can bend the transmission belt 52 and never interfere with the operation of the transmission belt 52. Moreover, the manners of fixing the first connecting portions 18 of the main body 11 and the second connecting portions 22 of the side panel 21 are not limited to use of screws, all the fixing means such as catchings or others should also be considered as the equivalent embodiments of the present invention.
