Press fitting mechanism for ejector rod of electromagnetic valve

Abstract

The utility model belongs to the technical field of electromagnetic valves, and relates to a press-fitting mechanism of an electromagnetic valve ejector rod, which comprises a press-fitting base, a guide blind hole is arranged on the press-fitting base, and a mounting groove is arranged at the bottom of the press-fitting base; a guide hole is formed between the mounting groove and the guide blind hole; a mounting groove is formed in the press-fitting base, an O-shaped ring is arranged in the mounting groove, the size of an inner ring of the O-shaped ring is the same as the diameter of the guide hole, a pressing block is connected to the bottom of the press-fitting base, and the pressing block presses the O-shaped ring in the mounting groove; a through hole is formed in the middle of the pressing block; a pressure conduction rod is movably arranged in the guide blind hole in a penetrating manner; the middle lower part of the pressure conduction rod is movably arranged in the guide blind hole in a penetrating manner; the pressure conduction rod is sleeved with a second elastic piece. After the structure is adopted, the press-fitting device has the beneficial effects that the structure is simple, a precise press-fitting structure of prepressing and coining is adopted, the production and assembly size error is effectively overcome, and the press-fitting precision is obviously improved.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, specifically, it relates to a press-fitting mechanism for an electromagnetic valve push rod. Background Technology

[0002] In the automotive industry, the press-fitting technology for solenoid valve pushrods exhibits significant characteristics of high precision and automation. Currently, the control of pressure accuracy is extremely stringent, requiring error to be controlled within 0.01 millimeters to ensure the stable performance of the solenoid valve.

[0003] For the ejector rod of a solenoid valve, auxiliary positioning is crucial during the press-fitting process, requiring a high degree of pre-positioning accuracy. In automated production lines, it's generally not advisable to use a robot to pre-position the ejector rod before final press-fitting, as this causes significant damage to the robot, introduces misalignment into the ejector rod's position, and prevents the release of press-fitting force, leading to bending and improper installation. Therefore, improvements are necessary. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a pressing mechanism for a solenoid valve push rod, which is simple in structure, easy to operate, and highly practical.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] As one aspect of this utility model, a press-fitting mechanism for a solenoid valve push rod is proposed, characterized in that it includes: a press-fitting base, on which a guide blind hole is formed, and at the bottom of the press-fitting base, an installation groove is formed; a guide hole is formed between the installation groove and the guide blind hole, the guide hole connecting the installation groove and the guide blind hole; the diameter of the guide hole is smaller than the diameter of the installation groove, and the diameter of the installation groove is smaller than the diameter of the guide blind hole; an O-ring is provided in the installation groove, the inner size of the O-ring being the same as the diameter of the guide hole; a clamping block is connected to the bottom of the press-fitting base, the clamping block pressing the O-ring into the installation groove; a through hole is formed in the middle of the clamping block; the center line of the through hole, the center line of the installation groove, the center line of the O-ring, the center line of the guide hole, and the center line of the guide blind hole coincide;

[0007] A pressure transmission rod is movably inserted into the guide blind hole; the lower middle part of the pressure transmission rod is movably inserted into the guide blind hole.

[0008] A second elastic element is sleeved on the pressure transmission rod, and the second elastic element is located between the upper boss of the pressure transmission rod and the upper end face of the press-fit base.

[0009] Optionally, the upper and lower surfaces of the through hole extend outward to form a first protrusion and a second protrusion, respectively, and the through hole penetrates the first protrusion and the second protrusion.

[0010] Optionally, the side of the press base is provided with a first stroke limiting elongated hole, and the lower part of the pressure transmission rod is provided with a limiting component mounting hole. A limiting pin is connected to the limiting component mounting hole. When the pressure transmission rod passes through the guide blind hole, the limiting pin is located in the first stroke limiting elongated hole.

[0011] Optionally, the press-fit base has an exhaust hole on its side, which is connected to a guide blind hole.

[0012] Optionally, the centerline of the vent hole is perpendicular to the centerline of the guide blind hole.

[0013] The advantages of the press-fitting mechanism for the solenoid valve push rod of this utility model are specifically reflected in the following aspects: simple structure, adopting a precise press-fitting structure of pre-pressing and fine pressing, effectively overcoming production assembly dimensional errors, significantly improving the accuracy of press-fitting, convenient operation, strong practicality, and greatly improving production efficiency. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0015] Figure 1 This is a schematic diagram of the pressing mechanism for the solenoid valve push rod of this utility model;

[0016] Figure 2 This is a structural cross-sectional view of the pressing mechanism of the solenoid valve push rod of this utility model;

[0017] Figure 3 This is a diagram showing the fit between the pressing mechanism of the solenoid valve push rod and the push rod of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] One embodiment of this application provides a press-fitting mechanism for a solenoid valve push rod, such as... Figures 1-3As shown, it includes: a press-fit base 321, on which a guide blind hole 322 is provided, and a mounting groove 323 is provided at the bottom of the press-fit base 321; a guide hole 324 is provided between the mounting groove 323 and the guide blind hole 322, the guide hole 324 connecting the mounting groove 323 and the guide blind hole 322; the diameter of the guide hole 324 is smaller than the diameter of the mounting groove 323, and the diameter of the mounting groove 323 is smaller than the diameter of the guide blind hole 322; the diameter of the guide hole 324 is adapted to the size of the solenoid valve's push rod; an O-ring 325 is provided in the mounting groove 323, the inner size of the O-ring 325 being the same as the diameter of the guide hole 324; and a clamping device is connected to the bottom of the press-fit base 321. Block 326, the clamping block 326 presses the O-ring 325 into the mounting groove 323; the clamping block 326 has a through hole 327 in the middle, the upper surface and the lower surface of the through hole 327 extend outward to form a first protrusion 328 and a second protrusion 329 respectively, the through hole 327 passes through the first protrusion 328 and the second protrusion 329, the end face of the first protrusion 328 presses the O-ring 325; the second protrusion 329 serves as the guide for the solenoid valve's push rod; the diameter of the through hole 327 is adapted to the size of the solenoid valve's push rod; the center line of the through hole 327, the center line of the mounting groove 326, the center line of the O-ring 325, the center line of the guide hole 324 and the center line of the guide blind hole 322 coincide.

[0020] Furthermore, a pressure transmission rod 3210 is movably inserted into the guide blind hole 322. In use, the upper part of the pressure transmission rod 3210 is detachably connected to the movable part of the pressing power unit; the middle and lower part of the pressure transmission rod 3210 is movably inserted into the guide blind hole 322; a first stroke limiting elongated hole 3211 is opened on the side of the pressing base 321, and a limiting component mounting hole is opened at the lower part of the pressure transmission rod 3210. A limiting pin 3213 is connected to the limiting component mounting hole. When the pressure transmission rod 3210 is inserted into the guide blind hole 322, the limiting pin 3213 is located in the first stroke limiting elongated hole 3211, limiting the stroke of the pressure transmission rod 3210.

[0021] The pressure transmission rod 3210 is fitted with a second elastic element 3214, which is located between the upper boss 3215 of the pressure transmission rod 3210 and the upper end face of the press base 321. The second elastic element 3214 keeps the pressure transmission rod 3210 and the upper end face of the press base 321 in a telescopic state. At this time, the limiting pin 3213 is located at the upper limit end of the first stroke limiting elongated hole 3211. During operation, the movable part of the press power unit presses down, and the pressure transmission rod 3210 has to overcome the elastic force of the second elastic element 3214 to descend. The lower end of the pressure transmission rod 3210 presses the top rod of the solenoid valve that passes through the guide hole 324 into the press component. When the limiting pin 3213 is located at the lower limit end of the first stroke limiting elongated hole 3211, the press is completed.

[0022] Furthermore, in this embodiment, as Figures 1-2 As shown, the side of the press base 321 is provided with an exhaust hole 3216, which is connected to the guide blind hole 322. The center line of the exhaust hole 3216 is perpendicular to the center line of the guide blind hole 322. Preferably, the exhaust hole 3216 is flush with the bottom of the guide blind hole 322, which can exhaust the air from the guide blind hole 322.

[0023] In this embodiment, as Figure 3 As shown, during operation, firstly, the press-fit component is fixed on the tooling fixture, and the push rod of the solenoid valve is mounted on the press-fit component to press and limit its position. Then, the pressure transmission rod 3210 transmits force under the action of the press-fit power unit, and the push rod is coarsely guided and inserted through the through hole 327 of the clamping block 326. The O-ring 325 fixes the push rod, and the guide hole 324 of the press-fit base 321 precisely positions the push rod. The second elastic element 3214 is compressed to precisely control the pressing of the pressure transmission rod 3210. The pressing depth is determined by the length of the first stroke limiting elongated hole 3211. The operation is simple and highly practical.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0028] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A press-fitting mechanism of a solenoid valve ejector rod, characterized by comprising: It includes: The press-fit base is provided with a guide blind hole, and the bottom of the press-fit base is provided with a mounting groove; a guide hole is provided between the mounting groove and the guide blind hole, and the guide hole communicates between the mounting groove and the guide blind hole; the diameter of the guide hole is smaller than the diameter of the mounting groove, and the diameter of the mounting groove is smaller than the diameter of the guide blind hole; an O-ring is arranged in the mounting groove, the inner diameter of the O-ring is the same as the diameter of the guide hole, the bottom of the press-fit base is connected with a pressing block, and the pressing block presses the O-ring in the mounting groove; a through hole is formed in the middle of the pressing block; A pressure transmission rod is movably arranged in the guide blind hole; the middle and lower parts of the pressure transmission rod are movably arranged in the guide blind hole; A second elastic member is sleeved on the pressure transmission rod, and the second elastic member is located between the upper boss of the pressure transmission rod and the upper end surface of the press-fit base.

2. The press-fitting mechanism for the solenoid valve poppet rod according to claim 1, wherein The upper surface and the lower surface of the through hole respectively extend outward to form a first convex part and a second convex part, and the through hole penetrates the first convex part and the second convex part.

3. The press-fitting mechanism for the solenoid valve poppet rod according to claim 2, wherein A first stroke limiting long slot is formed in the side edge of the press-fit base, a limiting member mounting hole is formed in the lower part of the pressure transmission rod, and a limiting pin is connected to the limiting member mounting hole; when the pressure transmission rod is arranged in the guide blind hole, the limiting pin is located in the first stroke limiting long slot.

4. The press-fitting mechanism for a solenoid valve poppet according to claim 1, wherein An exhaust hole is formed in the side edge of the press-fit base, and the exhaust hole is in communication with the guide blind hole.

5. The press-fitting mechanism for the solenoid valve poppet rod according to claim 4, wherein The center line of the exhaust hole is perpendicular to the center line of the guide blind hole.

6. The press fitting mechanism for a solenoid valve poppet rod according to claim 1, wherein The center line of the through hole, the center line of the mounting groove, the center line of the O-ring, the center line of the guide hole and the center line of the guide blind hole are coincident.

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