An integrated electromagnetic head structure

Abstract

The present invention discloses an integrated electromagnetic head structure, which relates to the field of automobile transmission hydraulic electromagnetic valves, and aims to solve the problem that the traditional electromagnetic head structure has a large number of parts, high assembly requirements, and requires complex part shapes to maintain the reverse magnetic path. The key points of its technical solution include a shell, a stopper iron is arranged in the shell, a sliding hole is opened in the middle of the stopper iron, and an armature push rod is arranged in the sliding hole; the side wall of the armature push rod is opened with a stepped ring groove to make it dumbbell-shaped. The present invention simplifies the electromagnetic head structure, and integrates the traditional armature, valve core push rod and pole shoe into a stepped core part, namely the armature push rod, so as to reduce the number of parts. The armature push rod is made of the same material as the armature, plays the role of the armature, can move directly, no longer requires a complex reverse magnetic path, and greatly reduces the assembly requirements.

Description

Technical Field

[0001] The invention relates to the field of automobile speed-changing hydraulic solenoid valves, and more specifically, to an integrated solenoid head structure. Background Art

[0002] The gearbox used in automobiles is gradually replaced by automatic gearbox, especially in mid-range and high-end automobiles, which are almost all automatic gearboxes. Modern automotive engine electronic control systems tend to choose solenoid valves as actuators more and more, because solenoid valves can directly control the injection amount and injection timing, and some injection rates can also be achieved by solenoid valves. In this way, 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 automatic gearbox.

[0003] The existing Chinese patent with authorization announcement number CN103050217B discloses a proportional electromagnet for an automatic transmission solenoid valve, which is composed of a sliding bearing, a stopper, a push rod, a gasket, a coil component, an armature, a pole shoe, a yoke and a bearing seat. The push rod and the armature are clearance-fitted and riveted together. The push rod passes through the inner holes of the sliding bearing, the stopper, the gasket and the armature.

[0004] However, the solenoid valve has a complex structure and many parts. It needs to maintain good coaxiality and fit, and has high assembly requirements. The armature, push rod and pole shoe all need to be realized using different process methods, which is costly and requires complex part shapes to maintain the reverse magnetic path. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an integrated electromagnetic head structure, which can reduce the number of parts, no longer require a complex reverse magnetic path, and greatly reduce the assembly requirements.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An integrated electromagnetic head structure comprises a shell, a stopper is arranged in the shell, a sliding hole is opened in the middle of the stopper, an armature push rod is arranged in the sliding hole; a stepped annular groove is opened on the side wall of the armature push rod to make it dumbbell-shaped.

[0008] Furthermore, the inner wall of the sliding hole is provided with two annular grooves respectively opposite to the ends of the armature push rod.

[0009] Furthermore, the end portion of the armature push rod, that is, the portion with a larger outer diameter, has a width greater than the width of the yielding ring groove.

[0010] In summary, the present invention has the following beneficial effects:

[0011] 1. The traditional armature, valve core push rod and pole shoe are integrated into an armature push rod, thereby reducing the number of parts and reducing production costs;

[0012] 2. The armature push rod is adopted, which no longer requires a complex reverse magnetic path and greatly reduces the assembly requirements;

[0013] 3. The armature push rod adopts a stepped design and is dumbbell-shaped, which can act as an anchor, optimize the magnetic path, and play a limiting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of an integrated electromagnetic head structure in an embodiment.

[0015] In the figure: 1, stop iron; 11, sliding hole; 12, give way ring groove; 2, armature push rod; 21, stepped ring groove; 3, valve core; 4, coil; 5, housing; 6, end cover. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0017] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0018] Example:

[0019] An integrated electromagnetic head structure, referring to Figure 1 It includes a shell 5, a stopper iron 1 is arranged in the shell 5, a sliding hole 11 is penetrated in the middle of the stopper iron 1, and an armature push rod 2 is arranged in the sliding hole 11; in this embodiment, the stopper iron 1 is T-shaped as a whole, and can also be straight-cylindrical; an end cover 6 is sleeved on the stopper iron 1, so that one end of the sliding hole 11 can be closed; a coil 4 is arranged between the shell 5 and the stopper iron 1, and the coil 4 generates electromagnetic force when energized, which can control the movement of the armature push rod 2. After the armature push rod 2 moves, it pushes the valve core 3 in the electromagnetic valve to move, thereby realizing the function of the electromagnetic valve.

[0020] A stepped annular groove 21 is provided in the middle of the side wall of the armature push rod 2, so that the armature push rod 2 is dumbbell-shaped as a whole, thereby playing the role of an anchor, optimizing the magnetic path, and playing a limiting role.

[0021] Two clearance annular grooves 12 are formed on the inner wall of the sliding hole 11 , which are respectively opposite to the ends of the armature push rod 2 , and the width of the end of the armature push rod 2 , that is, the part with a larger outer diameter, is greater than the width of the clearance annular grooves 12 .

[0022] Here’s how it works:

[0023] The present invention simplifies the electromagnetic head structure and integrates the traditional armature, valve core push rod and pole shoe into a stepped core part, namely the armature push rod 2, thereby reducing the number of parts; the armature push rod 2 is made of the same material as the armature, plays the role of the armature, can move directly, no longer requires a complex reverse magnetic path, and greatly reduces the assembly requirements.

Claims

1. An integrated electromagnetic head structure, characterized in that: The invention comprises a shell (5), wherein a stopper iron (1) is arranged in the shell (5), a sliding hole (11) is provided in the middle of the stopper iron (1), and an armature push rod (2) is provided in the sliding hole (11); a stepped annular groove (21) is provided on the side wall of the armature push rod (2), so that the armature push rod (2) is in a dumbbell shape; The inner wall of the sliding hole (11) is provided with two clearance ring grooves (12) respectively opposite to the ends of the armature push rod (2).

2. The integrated electromagnetic head structure according to claim 1, characterized in that: The end of the armature push rod (2), that is, the portion with a larger outer diameter, has a width greater than the width of the relief ring groove (12).

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