A riveting device for connecting a movable core to a piston

Abstract

The application provides a riveting device for connecting a movable iron core and a piston. The riveting device comprises a riveting column I, a sheath and a base. The riveting column I is a stepped column body. The upper end of the riveting column I has a larger diameter than the lower end. The lower end of the riveting column I is provided with a central hole which does not cut through the whole riveting column I. The end of the central hole is provided with a ring-shaped riveting groove. The sheath is provided with a central through hole. The diameter of the central through hole is the same as the diameter of the lower end of the riveting column I. The lower end of the central through hole is provided with a ring-shaped stop ring which extends inwardly. The stop ring does not completely close the central through hole. The base is provided with a central through hole. The base is provided with a ring-shaped placing groove at the upper end of the central through hole. The placing groove is used for placing the piston. The movable iron core and the piston can be connected more quickly by using the sleeve type riveting device, and the working efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of solenoid valves, specifically a riveting device for connecting the moving iron core and piston of a solenoid valve. Background Technology

[0002] Zero-pressure solenoid valves are a common type of solenoid valve. These valves allow the inlet and outlet to open via electromagnetic control even when there is no medium inside the valve body. They typically contain a moving iron core and a piston, which are fixed together by a movable bracket. The two ends of the movable bracket are respectively engaged with the moving iron core and the piston. However, after prolonged use, the engagement between the moving iron core and the piston can loosen or even detach, leading to valve failure. Riveting is a common fixing method, offering the advantage of a very strong and stable connection that is less prone to detachment. However, currently there are no riveting devices specifically designed for zero-pressure solenoid valves. Manually riveting by striking the valve in a circular motion is cumbersome and inefficient. Summary of the Invention

[0003] In view of the defects in the existing connection between the movable iron core and the piston, the technical problem to be solved by the present invention is to provide a riveting device specifically for riveting the connection between the movable iron core and the piston.

[0004] To achieve the above objectives, according to one aspect of the present invention, the invention is implemented by the following technical measures: a riveting device for connecting a movable iron core and a piston, comprising:

[0005] The riveting column I is a stepped column with a larger diameter at the upper end than at the lower end. The lower end of the riveting column I has a central hole that does not cut through the entire riveting column I, and a circular riveting groove is provided at the end of the central hole.

[0006] The sheath has a central through hole with the same diameter as the lower end diameter of the rivet column I. A ring-shaped retaining ring extends inward from the opening at the lower end of the central through hole, and the retaining ring does not completely seal the central through hole.

[0007] The base has a central through hole, and a circular placement groove is provided on the base at the upper opening of the central through hole for placing the piston.

[0008] This riveting device for connecting a movable iron core and a piston involves placing the piston on the placement groove of the base, inserting the movable iron core with a retaining spring into the center hole of the piston, and then putting a protective sleeve over the movable iron core, with the upper part of the movable iron core and the piston passing through the bottom opening of the protective sleeve and entering the inside of the protective sleeve. The retaining ring of the protective sleeve abuts against the outer edge of the piston. The riveting pin I is inserted into the protective sleeve from the top, so that the riveting groove at the bottom of the riveting pin I abuts against the upper end of the piston. The riveting pin I is then struck downwards, causing the riveting pin I to press against the upper end of the piston, causing the upper end of the piston to flip inwards and abut against the retaining spring, thus completing the riveting of the piston and the movable iron core.

[0009] Furthermore, the riveting device also includes a riveting column II, which is a stepped cylinder with an upper diameter smaller than its lower diameter. A ring-shaped retaining ring I extends upwards from the outer side of the top surface of the upper end of the riveting column II, forming a riveting surface with the top of the upper end of the riveting column II. Simultaneously, the upper diameter of the riveting column II is the same as the diameter of the central through hole in the base. For some high-pressure solenoid valve pistons that require bottom riveting, the above design involves inserting the riveting column II from the bottom of the base, so that the riveting surface of the riveting column II abuts against the bottom surface of the piston. Striking the riveting column II upwards causes the bottom surface of the piston to flip inwards under the action of the riveting surface and enclose the sealing ring.

[0010] Compared with the prior art, the advantages of the present invention are: the riveting connection between the movable iron core and the piston can be made faster and the work efficiency can be improved by using the sleeve-type riveting device. When riveting the piston of the high-pressure solenoid valve, the riveting column I and the riveting column II can be struck at the same time to realize the riveting action between the piston and the movable iron core and the riveting action of the sealing ring at the bottom of the piston, which is fast and convenient. Attached Figure Description

[0011] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0012] Figure 1 This is a schematic diagram of a riveting device for connecting a movable iron core and a piston, as described in this invention.

[0013] Figure 2 This is a schematic diagram of the riveted column I and the sheath structure described in this invention.

[0014] Figure 3 This is a schematic diagram of the base and riveting column II structure described in this invention.

[0015] Explanation of reference numerals in the attached drawings: 1. Riveting post I; 2. Sheath; 3. Base; 4. Riveting post II; 5. Movable iron core; 6. Piston; 7. Riveting groove; 8. Retaining ring; 9. Placement groove; 10. Retaining ring I; 11. Riveting surface. Detailed Implementation

[0016] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0017] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "bottom", "top", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] Example 1

[0019] Please refer to Figure 1 The riveting device for connecting a movable iron core and a piston provided in this embodiment consists of a riveting column I1, a riveting column II4, a protective sleeve 2, and a base 3.

[0020] Combination Figure 2 As shown, the above-mentioned riveting column I1 is a stepped cylinder. The diameter of the upper end of the riveting column I1 is larger than that of the lower end. The lower end of the riveting column I1 has a central hole. A ring-shaped riveting groove 7 is opened at the opening of the central hole. The above-mentioned sheath 2 is cylindrical with a central through hole. A ring-shaped retaining ring 8 is fixed at the bottom opening of the central through hole.

[0021] Combination Figure 3 As shown, the aforementioned riveting post II4 is also a stepped cylinder, and the diameter of the upper end of the riveting post II4 is smaller than that of the lower end. A thin-walled ring I10 extends upward from the outer side of the upper end face of the riveting post II4. The ring I10 and the upper end face of the riveting post II4 form a riveting surface 11. The aforementioned base 3 is cylindrical and has a central through hole. A ring-shaped placement groove 9 is opened at the upper end of the central through hole. At the same time, the lower end diameter of the aforementioned riveting post I1 is the same as the diameter of the central through hole of the sheath 2, and the upper diameter of the riveting post II4 is the same as the diameter of the central hole of the base 3.

[0022] In use, place the piston 6 on the placement slot 9 of the base 3, insert the movable iron core 5 with the retaining spring into the center hole of the piston 6, and then put the protective sleeve 2 over the movable iron core 5, that is, the movable iron core 5 and the upper part of the piston 6 pass through the retaining ring 8 of the protective sleeve 2 and enter the interior of the protective sleeve 2. The retaining ring 8 of the protective sleeve 2 abuts against the outer edge of the piston 6. Insert the rivet pin I1 into the protective sleeve 2 from the top, so that the rivet groove 7 at the bottom of the rivet pin I1 abuts against the upper end of the piston 6. Strike the rivet pin I1 downwards, and the rivet pin I1 will press the upper end of the piston 6, causing the piston 6 to... The upper end flips inward to abut against the retaining ring, completing the riveting of piston 6 and movable iron core 5. For some high-pressure solenoid valve pistons that require bottom riveting, when using, the riveting pin II4 is inserted from the lower part of the base 3, so that the riveting surface 11 of the riveting pin II4 abuts against the bottom surface of piston 6. The riveting pin II4 is struck upward, and under the action of the riveting surface 11, the lower end of piston 6 flips inward and covers the sealing ring. Of course, in order to facilitate riveting, it is best to set a retaining ring II with a diameter smaller than the center hole of piston 6 at both the upper and lower ends of the piston 6, and fix it by stamping the retaining ring II.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various changes and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A riveting device for connecting a movable iron core and a piston, characterized in that, include: The riveting column I is a stepped column with a larger diameter at the upper end than at the lower end. The lower end of the riveting column I has a central hole that does not cut through the entire riveting column I, and a circular riveting groove is provided at the end of the central hole. The sheath has a central through hole with the same diameter as the lower end diameter of the rivet column I. A ring-shaped retaining ring extends inward from the opening at the lower end of the central through hole, and the retaining ring does not completely seal the central through hole. The base has a central through hole, and a circular placement groove is provided on the base at the upper opening of the central through hole for placing the piston. The riveting column II is a stepped cylinder, and the diameter of the upper end of the riveting column II is smaller than the diameter of the lower end. A ring-shaped retaining ring I extends upward from the outer side of the top end face of the upper end of the riveting column II. The retaining ring I and the top of the upper end of the riveting column II form a riveting surface. At the same time, the upper diameter of the riveting column II is the same as the diameter of the central through hole of the base. When in use, place the piston on the base, insert the movable iron core with the snap ring into the center hole of the piston, and then put the sheath over the movable iron core. Riveting pin I presses the upper end of the piston so that the upper end of the piston flips inward and abuts against the snap ring. Riveting pin II presses the lower end of the piston so that it flips inward and covers the sealing ring.

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