This invention will be better understood by referring to the accompanying drawings, wherein:
A preferred embodiment of a starting device for a model engine in the present invention, as shown in
The model engine 20 has its outer side fixed with a hexagonal input rod 21 extending outward horizontally.
The starting device 3 is firmly fitted on the input rod 21 of the model engine 20, able to drive the input rod 21 to rotate. The starting device 3, referring to
The electric-operation unit 40 is mainly composed of an engage wheel 41 and a starting shaft 42. The engage wheel 41 is made of a disk, having its inner side bored with a hexagonal combining groove 411 to be firmly fitted on the outer side of the input rod 21 of the engine 20 and its outer side axially and eccentrically bored with engage notches 412 preset in number, which are respectively composed of an engage tooth groove 4121 and a spring groove 4122. Each engage notch 412 has its interior receiving an engage tooth 413 and an elastic member 414, and the engage tooth 413 is elastically engaged in the engage tooth groove 4121 and the elastic member 414 (a compression spring) electrically positioned in the spring groove 4122. Each engage tooth 413 has its upper end formed with a protruding elastic end 4131 for restrictingly positioning the elastic member 414 in the spring groove 4122 and has its lower outer side disposed with a positioning shaft 4132 extending outward. Further, the engage wheel 41 is fixed with a fitting rod 415 extending outward from the center. The starting shaft 42 has its inner end bored with a fitting slot 421 to be slidably fitted around the fitting rod 415 of the engage wheel 41. The fitting slot 421 of the starting shaft 42 has its circumference eccentrically bored with plural arc-shaped grooves 422 for respectively receiving the engage teeth 413 of the engage wheel 41, with the positioning shaft 4132 of the engage tooth 413 slidably positioned in the arc-shaped groove 422. Thus, when the arc-shaped grooves 422 are rotated, the positioning shafts 4132 will be driven to rotate and actuate the engage teeth 413 to move back and forth axially in the engage notches 412. Furthermore, the starting shaft 42 has the opposite side of the fitting slot 421 provided with a coupling rod 423 extending outward axially and having its center bored with a hexagonal starting slot 4231.
The rope-operation unit 50 includes a rope wheel 51, a pull rope 52 and a restoring elastic member 53. The rope wheel 51 has its center equidistantly and annularly bored with six gradually enlarged tooth grooves 511. The rope wheel 51 is further bored with an insert hole 512 in the center of the six gradually-enlarged tooth grooves 511, having its outer circumference formed with an annular rope recess 513. The coupling rod 423 of the starting shaft 42 is inserted through the insert hole 512 of the rope wheel 51 and pivotally fitted in the outward hole 311 of the housing 30. The engage wheel 41 is received in the gradually enlarged tooth grooves 511, having its engage teeth 413 respectively and elastically engaged in the gradually enlarged tooth grooves 511. The pull rope 52 is wound in the rope recess 513 of the rope wheel 51 to be drawn for actuating the rope wheel 51 to rotate, having one end secured on the rope pulley 51 and the other end inserted out of the rope hole 32 of the housing 30 and connected with a pull handle 521. The restoring elastic member 53 has one end secured on the rope wheel 51 and the other end fixed in the accommodating hollow 31 of the housing 30. Thus, when the pull rope 52 is drawn to turn the rope wheel 51, the restoring elastic member 53 will be compressed to produce a resilience restoring force.
In using, as shown in
Referring to
As can be understood from the above description, this invention has the following advantages.
1. The starting device for a model engine in the present invention is provided with the electric-operation unit and the rope-operation unit for starting the engine with different modes by changing the position of the engage teeth in the arc-shaped grooves, simple in structure, lowering the frequency of maintenance, and able to reduce producing cost and enhance market competitive force.
2. The starting device is composed of only a few components, and the electric-operation unit is received in the rope wheel, thus reducing the weight and the size of the starting device and the model car, and enhancing speeds and facilitating control of the model car.
3. The starting device is received in the interior of the housing, so the inner components of the starting device can be protected from being damaged, able to prolong the service life of the starting device.
While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.