Carpet yarn twisting machine

A carpet yarn twisting machine, comprising a machine frame (18), a creel unit (1), an electric spindle unit (5), an overfeeding unit (4) and a reeling unit (3), wherein,

• in the electric spindle unit (5), a hollow spindle rod (502) is fixedly connected with a motor (501), the motor (501) drives the hollow spindle rod (502) to rotate, a twisting disc (506) and a yarn storage disc (505) are fixedly connected with the hollow spindle rod (502) and rotate along with the hollow spindle rod (502),
• the yarn storage disc (505) is provided with yarn outlets (504), which communicate with inner yarn channels of the hollow spindle rod (502),
• spindle tanks for accommodating inner yarn packages (15) are provided with spindle rod bearings (509), the hollow spindle rod (502) is rotatably connected to the spindle rod bearings (509), and the spindle tanks are immobile,
• a liftable yarn guide unit (6) is disposed at a top of each one of the spindle tanks, the yarn guide unit (6) is internally provided with a first suspending arm structure, a base of the first suspending arm structure vertically slides along the machine frame,
• a first ceramic ring through which yarns pass is disposed at a free end of the fir suspending arm structure, an axis of the first ceramic ring is superimposed with an axis of the hollow spindle rod (502),
• in the overfeeding unit (4), driving overfeeding rollers (402) and driven overfeeding rollers (403) are arranged with an interval therebetween;
• the driven overfeeding rollers (403) are inclined with respect to an axis of the driving overfeeding rollers (402);
• the driving overfeeding rollers (402) are connected with a driving unit through a transmission mechanism;
• and a linear speed of surfaces of the driving overfeeding rollers (402) is higher than that of surfaces of reeling rollers (302) in the reeling unit (3),
• in each one of the driving overfeeding rollers (402), a driving gear (4021) is in an engaged connection with a driven gear (4022), while the driven gear (4022) is connected with a first shaft (4026) through a bearing (4028),
• the first shaft (4026) is fixedly connected with a roller body (4027), the first shaft (4026) is connected with a bracket (4029) through the bearing, a clutch disc (4023) is installed on the first shaft (4026) in an axial sliding way, the clutch disc (4023) is capable of driving the first shaft (4026) to rotate, an end face of the clutch disc (4023) and an end face of the driven gear (4022) are in a separable transmission connection,
• the first shaft is provided with a spring (4025) for compressing the clutch disc (4023) toward the driven gear (4022) and is also fixedly provided with an electromagnetic clutch (4024), and the electromagnetic clutch (4024) is internally provided with a coil (4030) for absorbing the clutch disc (4023) and overcoming the spring force of the spring (4025) and separating the clutch (4023) from the driven gear (4022),
• a tension unit (2) for tension control is also provided,
• the tension unit (2) is disposed on the creel unit (1), the tension unit (2) comprises driven tension rollers (201) and driving tension rollers (202) of which outer walls contact one another, the driven tension rollers (201) are fixedly installed, the driving tension rollers (202) are connected with tension air cylinders (203) through fork-shaped tension brackets (205), the tension air cylinders (203) communicate with air pipes (207), and each one of the air pipes (207) is provided with an electromagnetic proportioning valve (208) and an air pressure sensor (209), or
• the tension unit (2) is disposed on the machine frame, a tension roller or a yarn guide wheel (210) is fixedly connected with one end of a tension rod (218), the tension rod (218) is supported on a fixed tension rod bearing (211), the other end of the tension rod (218) extends into a sealed housing (212), a portion, in the sealed housing (212), of the tension rod (218) is provided with tension rod blades (213), the sealed housing (212) is internally filled in with damping medium (214), the tension rod (218) and the sealed housing (212) are in a sliding connection, a tension motor (217) and a nut sleeve (216) are in a fixed connection, the nut sleeve (216) and the sealed housing (212) are in a threaded connection, by rotating the nut sleeve (216), an axial position of the sealed housing (212) is capable of being adjusted, and a depth of the tension rod blades (213) in the damping medium (214) is capable of being adjusted.