Reel of electromagnetic valve

Abstract

The utility model discloses a solenoid valve reel which comprises a reel body of a cylindrical structure, a sliding hole is formed in the inner side of the reel body, and a movable iron core is arranged in the sliding hole. The inner wall of the sliding hole is provided with a plurality of protruding parts extending in the axial direction, the inner end faces of the protruding parts make contact with the circumferential side face of the movable iron core, the circumferential side of the movable iron core is in sliding fit with the inner end faces of the protruding parts, and the sectional area of the inner ends of the protruding parts is of a gradually-reduced structure. The electromagnetic valve can play a role in supporting and guiding sliding of the movable iron core, is low in cost and reliable in operation, and relates to the technical field of electromagnetic valves.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic valve, more exactly relates to a winding stand of electromagnetic valve. BACKGROUND

[0002] The electromagnetic valve is one of the indispensable components of automobile products, and its main function is to realize the on-off function of the pipeline.

[0003] For example, the electromagnetic valve applied in the automobile air spring has a shell, a containing space on the inner side of the shell is used for containing a coil assembly, the coil assembly includes a winding stand and a coil wound on the winding stand, a sliding hole is arranged on the inner side of the winding stand, a moving iron core is arranged in the sliding hole, and the coil assembly is energized to drive the moving iron core to move and perform corresponding action.

[0004] The existing sliding hole is provided with a magnetic separation sleeve (guide sleeve), which supports and guides the movement of the moving iron core, and has the disadvantage of high cost. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies and defects of the prior art, a winding stand capable of supporting and guiding the sliding of the moving iron core, and having low cost and reliable operation is provided.

[0006] A coil holder of an electromagnetic valve comprises:

[0007] The winding stand has a cylindrical structure, a sliding hole is arranged on the inner side of the winding stand, and a moving iron core is arranged in the sliding hole.

[0008] A plurality of axially extending protrusions are arranged on the inner wall of the sliding hole, the inner end surface of the protrusion is in contact with the peripheral surface of the moving iron core, and the peripheral surface of the moving iron core is in sliding cooperation with the inner end surface of the protrusion.

[0009] The cross-sectional area of the inner end of the protrusion is gradually reduced.

[0010] Compared with the prior art, the coil holder of the electromagnetic valve of the utility model has the following advantages:

[0011] When the moving iron core axially slides in the sliding hole, the protrusion supports and guides the moving iron core,

[0012] The cross-sectional area of the inner end of the protrusion is gradually reduced, which reduces the contact area between the inner end of the protrusion and the moving iron core, makes the sliding of the moving iron core more smooth, improves the structural strength of the protrusion, improves the reliability and service life.

[0013] Compared with the prior art in which a guide sleeve is used to guide the moving iron core,

[0014] The application reduces one part and lowers cost;

[0015] The machining process also does not need extremely high fineness compared with the guide sleeve, further lowering cost and facilitating assembly.

[0016] As an improvement of the utility model, the cross section of the protruding part is a fan-shaped structure.

[0017] As an improvement of the utility model, a plurality of protruding parts are arranged in a ring shape and at equal intervals on the inner wall of the sliding hole.

[0018] As an improvement of the utility model, the inner end of the protruding part is treated by a round corner to form an inner end surface of a circular arc structure.

[0019] As an improvement of the utility model, the protruding part and the bobbin are integrally formed by injection molding. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the utility model.

[0021] Figure 2 is a sectional structural schematic view of the bobbin of the utility model.

[0022] Figure 3 is a front view of the utility model.

[0023] Figure 4 is a sectional structural schematic view of the utility model Figure 3 in the direction of A-A.

[0024] Figure 5 is a sectional schematic view of the embodiment of the utility model.

[0025] In the drawing: 1, bobbin; 1.1, sliding hole; 2, moving iron core; 3, protruding part; 3.1, inner end; 4, coil; 5, static iron core; 5.1, guide hole; 6, guide rod. DETAILED DESCRIPTION

[0026] The utility model will be further described below in combination with the drawings and specific embodiments.

[0027] Please refer to Figures 1-5 The coil 4 frame of the electromagnetic valve shown in the drawing comprises:

[0028] The bobbin 1 in a cylindrical structure is provided with a sliding hole 1.1 on the inner side, and the sliding hole 1.1 is provided with a moving iron core 2 inside;

[0029] The inner wall of the sliding hole 1.1 is provided with a plurality of axially extending protrusions 3, the inner end 3.1 of the protrusion 3 is in contact with the circumferential surface of the moving iron core 2, and the circumferential surface of the moving iron core 2 is in sliding fit with the inner end 3.1 of the protrusion 3.

[0030] The cross-sectional area of the inner end 3.1 of the protrusion 3 is gradually reduced.

[0031] When the moving iron core 2 axially slides in the sliding hole 1.1, the protrusion 3 supports and guides the moving iron core 2,

[0032] The cross-sectional area of the inner end 3.1 of the protrusion 3 is gradually reduced, which reduces the contact area between the inner end 3.1 of the protrusion 3 and the moving iron core 2, makes the moving iron core 2 slide more smoothly while maintaining the functional effect, and also makes the structural strength of the protrusion 3 better, improves the reliability, and prolongs the service life.

[0033] Compared with the prior art scheme of guiding the moving iron core 2 by a guide sleeve,

[0034] The present application reduces one part and reduces the cost;

[0035] Compared with the guide sleeve, the machining process also does not require extremely high precision, which further reduces the cost and is beneficial to assembly.

[0036] As an improvement of the present application, the cross section of the protrusion 3 is a fan-shaped structure. The fan-shaped protrusion 3 has an inner end 3.1 at one end with a smaller cross section and is connected to the inner wall of the sliding hole 1.1 at the other end with a larger cross section, which has the characteristics of simple manufacturing and higher structural strength.

[0037] As an improvement of the present application, a plurality of protrusions 3 are arranged in a ring shape at equal intervals on the inner wall of the sliding hole 1.1, so that the contact areas between the inner end 3.1 of the protrusion 3 and the moving iron core 2 are distributed in a circumferential ring shape along the moving iron core 2, and the spacing between adjacent contact areas is uniform. When the moving iron core 2 slides, the stress distribution is more uniform, and there is no local large resistance to cause unstable sliding of the moving iron core 2, so that the sliding reliability of the moving iron core 2 is improved.

[0038] As an improvement of the present application, the inner end 3.1 of the protrusion 3 is rounded to form an inner end 3.1 surface with a circular arc structure.

[0039] The inner end 3.1 of the protrusion 3 is provided with an inner end 3.1 surface with a circular arc structure, which can further improve the structural strength of the protrusion 3 while reducing the contact area with the moving iron core 2.

[0040] As an improvement of the utility model, the convex part 3 and the winding frame 1 are integrally formed by injection molding. After the above improvement, the utility model has the characteristics of low cost and convenient production and manufacturing.

[0041] Please refer to Figure 5 For the embodiment of the utility model, the winding frame 1 is provided with a coil 4 around the side, a static core 5 is arranged at the lower end of the sliding hole 1.1, when the coil 4 is electrified, the dynamic core 2 moves downward to be attracted to the static core 5, when the coil 4 is de-energized, the reset assembly (spring arranged between the dynamic core 2 and the static core 5) drives the dynamic core 2 to move upward to reset.

[0042] Specifically, the lower end of the dynamic core 2 is connected with a guide rod 6, the lower end of the guide rod 6 passes through the guide hole 5.1 on the static core 5 to connect a functional part (for example: valve core), the guide hole 5.1 plays a guiding role for the up-down movement of the guide rod 6, in combination with the guiding role of the convex part 3 for the dynamic core 2, the two guiding roles make the movement of the dynamic core 2 more stable and reliable.

[0043] The above is only the preferred embodiment of the utility model, the protection scope of the utility model is not limited to the above embodiment, any technical scheme under the idea of the utility model belongs to the protection scope of the utility model. It should be pointed out that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.

Claims

1. A bobbin of a solenoid valve, characterized by comprising: The application relates to a bobbin (1) with a cylindrical structure, which is internally provided with a sliding hole (1.1) and a moving iron core (2) arranged in the sliding hole (1.1). A plurality of axially extending protrusions (3) are arranged on the inner wall of the sliding hole (1.1), the inner end (3.1) of the protrusions (3) is in contact with the circumferential surface of the moving iron core (2), and the circumferential surface of the moving iron core (2) is in sliding fit with the inner end (3.1) of the protrusions (3). The cross-sectional area of the inner end (3.1) of the protrusions (3) is gradually reduced. The cross section of the protrusions (3) is in a fan-shaped structure.

2. The bobbin of claim 1, wherein: The plurality of protrusions (3) are arranged in a ring shape on the inner wall of the sliding hole (1.1) at equal intervals.

3. The bobbin of claim 1, wherein: The inner end (3.1) of the protrusions (3) is treated by a round corner to form a circular arc structure.

4. The bobbin of claim 1, wherein: The protrusions (3) and the bobbin (1) are integrally formed by injection molding.

5. The bobbin of claim 1, wherein: ​

Images