Wire constant-speed advancing driving device

The utility model discloses a lead constant-speed advancing driving device which comprises a box body, a first gear and a motor, the first gear is arranged at the lower end in the right side wall of the box body, the motor is installed at the right end of the first gear, and the lead constant-speed advancing driving device further comprises a lower rubber roller which is fixedly connected to the left end of the first gear. The left end of the lower rubber roller is fixedly connected with a second gear; and the third gear is arranged at the upper end of the first gear, a limiting block is arranged in the middle of the left side of the third gear, a connecting column is fixedly connected to the upper end of the inner side wall of the third gear, and sliding grooves are formed in the two sides of the connecting column. The lead constant-speed advancing driving device is provided with the two rubber rollers which rotate oppositely to clamp the lead and drive the lead to advance at a constant speed, and one rubber