Winding motor carbon brush wear alarm device for hoisting
A technology of alarm devices and winding motors, which is applied in the direction of electromechanical devices, alarms, electrical components, etc.
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Embodiment 1
[0019] Embodiment one: if Figure 1-4 As shown, the carbon brush wear alarm device for a winding motor for lifting involved in this embodiment includes a switch contact device, a fixing device and a single-chip microcomputer. The switch contact device includes an insulating ball, a switch and a connection structure, and the switch passes through the connection structure. Connected to the single-chip microcomputer, the insulating ball and the switch are connected by contact, the insulating ball, the connecting structure and the switch are die-cast in the body, the connecting structure uses two parallel lead wires at right angles to lead out through the upper end of the body, the insulating ball and the switch are located at the corner of the bottom of the body position, and there is a square protrusion at this position, more than half of the volume of the insulating ball is located on the square protrusion, and it can ensure that the insulating ball will not fall in the body;
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Embodiment 2
[0026] Embodiment two: if figure 2 As shown, a kind of carbon brush wear alarm device for hoisting winding motor involved in this embodiment, a switch contact device is installed next to the original 6 brush blocks, when the carbon brush is in normal operation, the carbon brush will squeeze contacts. Because the carbon brush is subjected to constant force spring tension in the brush box, it will move in the brush box. When the length of the carbon brush reaches the alarm value, the carbon brush can no longer squeeze the contact, such as figure 2 shown on the right. The switch is disconnected, and the signal is alarmed through the single chip microcomputer, prompting the position of the carbon brush that needs to be replaced.
Embodiment 3
[0027] Embodiment three: as Figure 5 As shown, a carbon brush wear alarm device for a winding motor for lifting involved in this embodiment, taking the single-chip microcomputer pins packaged in PDIP as an example, the wiring schematic diagram of the alarm device is as follows Figure 5 As shown, only one of the six groups of alarm devices is connected here (the rest are the same), and one lead wire of the alarm device is connected to the P0.0 pin of the microcontroller. The relay (playing the role of high temperature protection) is turned on through the SB1 switch (which is the switch in the alarm device, and the insulating ball presses the switch. When the brush block reaches the wear alarm position, the brush block no longer presses the insulating ball, and the switch rebounds disconnected) connected to the P2.7 pin. When the SB1 switch is turned on, the high-level signal of P0.0 is transmitted to the P2.7 pin, and P2.7 is high-level at this time. When the program is set,...
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