The wiper is driven by a motor, and the rotary motion of the motor is transformed into the reciprocating motion of the wiper arm (that is, the part on the windshield except for the wiper blade) through the linkage mechanism to realize the wiper action.
An automobile wiper intermittent capable of controlling the automobile wiper assembly in an intermittent working state. It is to fix an end cover on the open end of the existing rectangular shell, and fix three terminals on the end cover respectively. Make corresponding sliding grooves on the left and right sides of the housing, and insert the circuit board into the sliding groove. Internally fixed, the electronic components are mounted on the circuit board. It can not only trigger the conduction once after a quick start, but also wait for the next trigger conduction according to the set time (intermittent), and work continuously to achieve intermittent control of the car wiper. Into the purpose of work.
Automobile relay is an indispensable element in the car, which mainly plays a control role. Automobile wiper relay is mainly composed of magnetic circuit system, contact system and restoration mechanism. The magnetic circuit system is composed of iron core, yoke, armature, coil and other parts; the contact system is composed of static reeds, movable reeds, contact bases and other parts; the restoration mechanism is composed of restoration reeds or tension springs.
Let me introduce to you the welding process of car wiper relay:
PCB board type non-plastic encapsulated relays are very susceptible to contamination by flux. It is recommended to use flux-resistant or plastic-encapsulated relays to prevent flux gas from entering the gap between the terminal and the base and the shell. If the flux-resistant relay is preheated and dried (100℃1 Minutes), you can further prevent flux intrusion.
When using flux coating or automatic soldering, be careful not to damage the performance of the car wiper relay. Flux-resistant relays or plastic-encapsulated relays can be applied to dip soldering or wave soldering processes, but the maximum soldering temperature and time should vary with the selected car relay Take control. There are three main welding methods for automotive relays:
1. Manual welding: The recommended welding temperature is 300℃-350℃, and the welding time is controlled within 2 seconds.
2. Cooling: The heat of the automotive relay caused by the soldering process can be relieved by cooling at the end of the process, so do not suddenly change the temperature, especially to avoid cold shock to the thermal relay.
3. Wave soldering: The recommended soldering temperature is: 240℃~260℃, the time is about 5 seconds, and the best soldering temperature is 250℃