Knob switch and miniature operation control device of crame electric system
A gear switch and electrical system technology, applied in the direction of electric switches, electrical components, transportation and packaging, etc., can solve the problem of not realizing the miniaturized operation control device of the crane electrical system, without changing the crane control device, wiring method, and operation control device Bulk and bulky, etc., to achieve the effect of convenient and quick installation, shortened installation and wiring time, and complete protection items
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Embodiment 1
[0045] Embodiment 1: Referring to Figures 1, 2, 3, 4, 5-1 to 5-5, the rotary knob 1 is fixedly installed on the rotary rod 2, and the fixed stop disc 9 is fixedly connected with the bottom plate 10 through the connecting device 12 to form a gear switch body, two left and right symmetrical fixed stop screws 6 are fixedly installed in the gear hole of the fixed stop disc 9 , and there is a stop plate 7 fixedly connected with the rotary rod 2 and rotated synchronously with it under the fixed stop disc 9 , on the bottom plate 10 The front and rear symmetrical positions of the front and rear are clamped with a spring piece 3, and the inner side of the spring piece 3 is two balls 4 that are in contact with the spring piece. 5 is connected in contact with the ball, and its center is fixedly connected with the rotating rod 2. The center of the gear circuit board 14 is fixedly connected with the rotary rod 2, the gear circuit board 14, the contact reed and the contact circuit board 15 ...
Embodiment 2
[0047] Embodiment 2: Refer to Figure 6-1. At zero gear, the switches are all in the off state. When the first gear is rotated clockwise, the public contact D and contact C are closed, and the coil of relay J11 is energized, and its contact Point J11 is closed; similarly, the relay contacts J11 and J41 of the second gear are closed; the relay contacts of the third gear J11, J41 and J42 are closed; The relay contacts J11, J41, J42, J43, J44 are closed. Rotate the first gear counterclockwise, the public contact D and the contact E are closed, the relay J21 coil is energized, and its contact J21 is closed; similarly, the second gear relay contacts J21 and J41 are closed; the third gear relay contact J21 , J41, J42 are closed; the four gear relay contacts J21, J41, J42, J43 are closed; the five gear relay contacts J21, J41, J42, J43, J44 are closed.
[0048] The meanings and working principles of the symbols in Figure 6-2, Figure 6-3, Figure 6-4, and Figure 6-5 are the same as tho...
Embodiment 3
[0049] Embodiment 3: Referring to Fig. 9, use a 5-0-5 reversible symmetrical control circuit to control a single winding motor rotor circuit series resistance asymmetry cut off speed regulation, when the clockwise first gear, the relay contact J11 is closed, the AC contactor When K11 is energized, its contact K11 is closed, the brake is energized and released, and the motor rotates forward at low speed; similarly, the AC contactors K41, K42, K43, and K44 of the second gear, third gear, fourth gear, and fifth gear are sequentially activated. The contacts of the electric motor are closed in sequence, and the rotor resistance of the motor is cut off segment by segment, and the motor gradually accelerates to the rated speed. When the first gear is counterclockwise, the relay contact J21 is closed, the AC contactor K21 is energized, its contact K21 is closed, and the motor reverses at low speed; similarly, the motor accelerates gradually in the second gear, third gear, fourth gear, ...
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