Speed changer
A technology for variable speed tools and rotating speed, which is applied in the direction of manufacturing tools, gear transmission devices, portable mobile devices, etc. It can solve the problems of complex mechanical structure of gear transmission mechanism and the inability to truly realize the industrialization of automatic gear shifting, so as to avoid tooth punching, The effect of prolonging the service life
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[0041] refer to Figure 1 to Figure 3b As shown, it is a structural schematic diagram of the first embodiment of the driving device of the variable speed tool control system of the present invention. A variable speed tool 9 includes a motor 2 , a motor power supply 1 , a main switch 13 for starting / stopping the motor, an output shaft 6 and a gear transmission mechanism 4 . The gear transmission mechanism 4 includes a first planetary gear set composed of a first planetary gear 40 and a first planetary carrier, a second planetary gear set composed of a second planetary gear 42 and a second planetary carrier 43, and is fixedly arranged on the tool housing The anti-rotation device 44 and the movable member 45 that can move axially. The driving device 5 is arranged on the gear transmission mechanism 4, and comprises a driving member 52 and a transmission member 51. The driving member of the present embodiment adopts an electromagnet device, including two permanent magnets 521 at a...
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