Integrated electromagnetic head structure

Abstract

The invention discloses an integrated electromagnetic head structure, relates to the field of automobile variable-speed hydraulic electromagnetic valves, and aims to solve the problems that a traditional electromagnetic head structure has a large number of parts and high assembly requirements, and complex part shapes are needed to maintain an inverted magnetic path. According to the technical scheme, the integrated electromagnetic head structure is characterized by comprising a shell, a blocking iron is arranged in the shell, a sliding hole is formed in the middle of the blocking iron, an armature push rod is arranged in the sliding hole, and the side wall of the armature push rod is provided with a cascade ring groove which makes the armature push rod be dumbbell-shaped. According to theintegrated electromagnetic head structure, the structure of the electromagnetic head is simplified, a traditional armature, a valve core push rod and a pole shoe are integrated into a stepped core part, namely the armature push rod, so that the number of parts can be reduced. The armature push rod is made of the same material as an armature and plays the role of the armature, the structure can bemoved directly, complicated reverse magnetic paths are not needed, and assembly requirements are greatly reduced.

Description

technical field [0001] The invention relates to the field of hydraulic solenoid valves for automobile speed change, more specifically, it relates to an integrated solenoid head structure. Background technique [0002] The gearboxes used in automobiles are gradually replaced by automatic gearboxes, especially in mid-to-high-end cars, almost all automatic gearboxes are used. Modern vehicle engine electronic control systems are increasingly inclined to choose solenoid valves as actuators, because solenoid valves can directly control fuel injection volume and fuel injection timing, and part of the fuel injection rate can also be achieved by solenoid valves. In this way, the three control items can be completed with only one actuator, which greatly simplifies the hardware of the entire electronic system. Therefore, the solenoid valve is one of the most important components in the current automatic transmission. [0003] The existing authorized notification number is the Chinese ...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned solenoid valve has a complex structure and many parts, and needs to maintain good coaxiality and coordination. It has high requirements for assembly. The armature, ejector rod and pole piece all need to be realized by different processes, and the cost is relatively high. Preserve inverted flux paths with complex part shapes

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