The back and forth movement of the paper nozzle in the printer is achieved by an eccentric linkage mechanism. The eccentric wheel 14 is linked with the camshaft by a key, and the connecting rod 15 is sleeved on the eccentric wheel, and a roller is arranged in the middle of them, and the other end is sleeved outside the roller on the connecting rod 16. When the eccentric 14 rotates, the links 15, 16 are driven to move. The connecting rod 17, the bearing 18 and the guide rail 20 ensure that the suction nozzle moves forward and backward substantially along a straight path.
The eccentric wheel 14 is sleeved on the shaft 1, and the shaft 1 is provided with a cam 21 and a cam 2 to control the movement of the paper suction nozzle and the paper presser foot, and both ends of the shaft 1 are sleeved with bearings (the old one is a single row ball The bearing, new is the thrust bearing), the right side of the bearing is connected to the universal joint.
The connecting rods 16, 22, 3 are sleeved on a small shaft, and both ends of the small shaft are also mounted on bearings.
The universal joint drives the shaft 1 to rotate. The eccentric wheel 14, the cam 21, and the cam 2 on the shaft 1 drive the paper-feeding nozzle, the paper-receiving nozzle, and the presser foot to perform a blowing motion.
Dynamic source generation:
Since the cam 21 and the cam 2 have a large difference between the high and low surfaces, when they are moving from the highest surface to the lower surface, the tension spring 27 and the tension spring 12 are
The pulling force generated by the bearing 23 and the bearing 6 generates an impact on the cam 21 and the cam 2 and there is a tendency of rushing forward, that is, the shaft 1 itself is not moving at a constant speed during the movement. If the thrust bearing supporting the shaft 1 is loose, then Its tendency to rush forward is even more serious. This is the source of the paper feeding nozzle's shaking.
Affected parts:
1, the joint itself of the Xiaozi, Jian trough, health and other loose.
2. Axial looseness of thrust bearing on shaft 1.
3, the bearing on the small shaft swims.
Find analysis:
The first type of problem is more obvious. Find out the damage.
The second type of problem is relatively obscure, especially the mechanism with no adjustment at both ends of the thrust bearing, which is ensured by the processing dimensions. Once worn, the shaft 1 has axial and radial runout.
Type 3 problems can sometimes be observed and sometimes difficult to see.
Processing method:
1, replace the other parts.
2. A washer with a certain thickness is added to the outer ring of the thrust bearing on the left end of the shaft 1. The first one is to overcome the axial concatenation caused by the wear of the bearing, and the second is to increase the expulsion between the bearings, which brings certain resistance to the shaft 1. To overcome jitter.
3, in the outer ring of the small shaft with a certain thickness of the washer, one is to overcome the possible movement between them, the second is to increase resistance. Overcoming jitter.
The eccentric wheel 14 is sleeved on the shaft 1, and the shaft 1 is provided with a cam 21 and a cam 2 to control the movement of the paper suction nozzle and the paper presser foot, and both ends of the shaft 1 are sleeved with bearings (the old one is a single row ball The bearing, new is the thrust bearing), the right side of the bearing is connected to the universal joint.
The connecting rods 16, 22, 3 are sleeved on a small shaft, and both ends of the small shaft are also mounted on bearings.
The universal joint drives the shaft 1 to rotate. The eccentric wheel 14, the cam 21, and the cam 2 on the shaft 1 drive the paper-feeding nozzle, the paper-receiving nozzle, and the presser foot to perform a blowing motion.
Dynamic source generation:
Since the cam 21 and the cam 2 have a large difference between the high and low surfaces, when they are moving from the highest surface to the lower surface, the tension spring 27 and the tension spring 12 are
The pulling force generated by the bearing 23 and the bearing 6 generates an impact on the cam 21 and the cam 2 and there is a tendency of rushing forward, that is, the shaft 1 itself is not moving at a constant speed during the movement. If the thrust bearing supporting the shaft 1 is loose, then Its tendency to rush forward is even more serious. This is the source of the paper feeding nozzle's shaking.
Affected parts:
1, the joint itself of the Xiaozi, Jian trough, health and other loose.
2. Axial looseness of thrust bearing on shaft 1.
3, the bearing on the small shaft swims.
Find analysis:
The first type of problem is more obvious. Find out the damage.
The second type of problem is relatively obscure, especially the mechanism with no adjustment at both ends of the thrust bearing, which is ensured by the processing dimensions. Once worn, the shaft 1 has axial and radial runout.
Type 3 problems can sometimes be observed and sometimes difficult to see.
Processing method:
1, replace the other parts.
2. A washer with a certain thickness is added to the outer ring of the thrust bearing on the left end of the shaft 1. The first one is to overcome the axial concatenation caused by the wear of the bearing, and the second is to increase the expulsion between the bearings, which brings certain resistance to the shaft 1. To overcome jitter.
3, in the outer ring of the small shaft with a certain thickness of the washer, one is to overcome the possible movement between them, the second is to increase resistance. Overcoming jitter.
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