Piston for electromagnetic valve

Abstract

The piston for the electromagnetic valve comprises a cover body, the cover body comprises a cover plate and a cover wall, the cover plate comprises a front face and a back face, and a guide tightening groove is formed in the edge of the front face. The center of the cover plate is provided with a mounting hole penetrating through the front and back circular truncated cone bulges; a first round hole and a second round hole are further formed in the cover plate, a first surrounding edge is arranged on the front face, a second surrounding edge is arranged on the back face, on the front face, the first round hole is formed in the inner side of the first surrounding edge, the second round hole is formed in the outer side of the first surrounding edge, on the back face, the first round hole is formed in the outer side of the second surrounding edge, and the second round hole is formed in the inner side of the second surrounding edge. A force application point is provided for screwing of a piston through the guide screwing groove, the guide screwing groove is perpendicular in the screwing direction, tool screwing is facilitated, the other side of the guide screwing groove is obliquely guided, a screwing tool can enter the groove easily, alignment is not needed, and use is convenient. Different hole positions are blocked through the front and back faces, pressure is evenly distributed, the first groove and the second groove are designed in the front and back faces respectively, pressure relief is facilitated, deformation of the sealing piece is avoided, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a piston for a solenoid valve. Background Art

[0002] A solenoid valve uses electromagnetic force to control the flow of fluid. The piston is a key component within the solenoid valve, primarily used to control the valve's opening and closing. The existing piston is threaded onto the solenoid valve sleeve. The mechanical movement of the piston within the valve cavity opens or closes the valve port, enabling the solenoid valve to operate.

[0003] Currently, piston threads are tightened primarily by tightening the entire circumference of the piston, which complicates tooling and can easily cause misalignment and difficulty in operation. Existing pistons also incorporate seals, but the pressure differential created during piston movement can cause seal deformation, directly impacting the sealing effect and ultimately shortening the solenoid valve's service life. Summary of the Invention

[0004] In view of the above problems, the utility model provides a piston for a solenoid valve.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A piston for a solenoid valve comprises a cover body, wherein the cover body comprises a cover plate and a cover wall, wherein the cover wall is a short cylinder with two ends open, and the cover plate is fixed to an end surface of one end of the cover wall;

[0007] The cover plate includes a front side and a back side, and a guide screwing groove is provided on the edge of the front side of the cover plate; a frustum protrusion is symmetrically provided at the center of the front side and the back side, and a mounting hole is provided at the center of the cover plate that passes through the frustum protrusions on the front side and the back side;

[0008] The cover plate is also provided with a first circular hole and a second circular hole passing through the front and back surfaces. The front surface of the cover plate is provided with a first surrounding edge, and the back surface of the cover plate is provided with a second surrounding edge. On the front surface of the cover plate, the first circular hole is on the inner side of the first surrounding edge, and the second circular hole is on the outer side of the first surrounding edge. On the back surface of the cover plate, the first circular hole is on the outer side of the second surrounding edge, and the second circular hole is on the inner side of the second surrounding edge.

[0009] Furthermore, the guide tightening groove is a right-angled trapezoidal groove, the groove opening of the guide tightening groove is larger than the groove bottom of the guide tightening groove, the tightening side of the guide tightening groove is one side of the right-angle side, and the other side of the guide tightening groove is an inclined surface.

[0010] Furthermore, there are at least three guide and tightening grooves, and the guide and tightening grooves are equidistantly arranged along the circumference of the cover plate.

[0011] Furthermore, the first surrounding edge and the second surrounding edge are irregular shapes of closed curves, and the heights of the first surrounding edge and the second surrounding edge are the same as the height of the frustum protrusion.

[0012] Furthermore, the first circular hole and the second circular hole are arranged along the same circumference, a first groove is provided on the front side of the cover plate, and the second circular hole is arranged in the first groove, and a second groove is provided on the back side of the cover plate, and the first circular hole is arranged in the second groove.

[0013] Furthermore, on the reverse side of the cover plate, a plurality of supporting protrusions are provided on the inner side of the second surrounding edge, and the height of the supporting protrusions is the same as that of the second surrounding edge.

[0014] Furthermore, the outer side of the cover wall is provided with a fixed sealing sleeve through a pressing tooth sleeve.

[0015] Furthermore, an air release groove is provided on the second surrounding edge near the second circular hole.

[0016] Furthermore, the cover body is made by integral connection.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention provides a force point for the screwing of the piston through the design of the guide tightening groove, which is convenient for inserting the tool into the guide tightening groove for screwing and installation, and is simple and convenient to use. The guide tightening groove is a right-angled trapezoidal groove, which is almost vertical in the tightening direction, which is convenient for the tool to tighten. The other side is inclined to guide, which is convenient for the tightening tool to enter the groove. No special alignment is required, and it is not easy to be clamped during use, which is convenient for the screwing and installation of the piston, and is convenient to use. The guide tightening groove requires little additional space, only a small gap is sufficient, and it is particularly suitable for use in the case of a small shock absorber cylinder diameter. (2) The present invention realizes the blocking of the first circular hole on the front and the second circular hole on the back of the cover plate by designing the first surrounding edge and the second surrounding edge. By blocking different hole positions on the front and back sides, the pressure is evenly distributed, avoiding excessive pressure on one side of the seal when the piston moves, causing the seal to deform, affecting the blocking effect and the service life of the solenoid valve. In addition, a first groove and a second groove are designed on the front and back sides respectively. When in use, the gap between the first groove and the second groove and the installed seal can be connected to the solenoid valve cavity outside the piston to relieve pressure, avoid deformation of the seal, and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a piston for a solenoid valve of the present utility model;

[0019] Figure 2 This is a bottom view of a piston for a solenoid valve of the present utility model;

[0020] Figure 3 This is a front view of a piston for a solenoid valve of the present utility model;

[0021] Figure 4 The utility model is a schematic diagram of the installation structure of a piston for a solenoid valve. DETAILED DESCRIPTION

[0022] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0023] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A piston for a solenoid valve according to an embodiment of the present invention includes a cover body, which includes a cover plate 100 and a cover wall 200. The cover wall 200 is a short cylinder with openings at both ends. The cover plate 100 is fixed on the end face of one end of the cover wall 200. A thread is provided on the inner side of the cover wall 200 for fixing to the valve sleeve of the solenoid valve.

[0024] The cover plate 100 includes a front side 101 and a back side 102. The front side 101 is the side of the cover plate facing outward, and the back side 102 is the side of the cover plate facing the inside of the cover wall 200. The edge of the front side 101 of the cover plate is provided with a guide tightening groove 110. The design of the guide tightening groove 110 provides a force point for screwing the piston, making it convenient to insert a tool into the guide tightening groove 110 for screwing and installation, which is simple and convenient to use. The centers of the front side 101 and the back side 102 are symmetrically provided with frustum protrusions 120, respectively. The center of the cover plate is provided with a mounting hole 130 that passes through the frustum protrusions 120 on the front side 101 and the back side 102. The mounting hole 130 is used to install a seal. The design of the frustum protrusion 120 ensures the strength of the mounting hole 130 and increases the service life of the mounting hole 130.

[0025] The cover plate 100 is further provided with a first circular hole 140 and a second circular hole 150 passing through the front side 101 and the back side 102. The front side 101 of the cover plate is provided with a first surrounding edge 160, and the back side 102 of the cover plate is provided with a second surrounding edge 170. On the front side 101 of the cover plate, the first circular hole 140 is on the inner side of the first surrounding edge 160, and the second circular hole 150 is on the outer side of the first surrounding edge 160. On the back side 102 of the cover plate, the first circular hole 140 is on the outer side of the second surrounding edge 170, and the second circular hole 150 is on the inner side of the second surrounding edge 170.

[0026] like Figure 4When in use, the connecting column 1 is installed through the mounting hole 130, and the connecting column 1 is used to fix the sealing gasket 2, the sealing block 3 and other sealing parts on the front and back of the cover plate respectively. The sealing gaskets 2 on both sides are respectively fixed on the first surrounding edge 160 and the second surrounding edge 170, so that the first circular hole 140 is blocked on the front and the second circular hole 150 is blocked on the back. By blocking different hole positions on the front and back, the pressure is evenly distributed, which avoids the deformation of the seal caused by excessive pressure on one side of the seal when the piston moves, affecting the sealing effect and the service life of the solenoid valve.

[0027] The guide tightening groove 110 is a right-angled trapezoidal groove. The notch of the guide tightening groove 110 is larger than the bottom of the guide tightening groove 110. The tightening side of the guide tightening groove 110 is one side of the right-angled edge, and the other side of the guide tightening groove is an inclined surface 111. It is nearly vertical in the tightening direction, facilitating the tightening of the tool. The other side is inclined and guided, facilitating the tightening tool to enter the groove, eliminating the need for special alignment. During use, it is not easily misaligned, facilitating the screwing and installation of the piston, and providing convenience. The guide tightening groove 110 requires little additional space, only a small gap, making it particularly suitable for use in shock absorber cylinders with small diameters.

[0028] There are at least three guide tightening grooves 110, and the guide tightening grooves 110 are equidistantly arranged along the circumference of the cover plate 100. By providing multiple guide tightening grooves 110, it is convenient to adjust the position and apply force when tightening, which is convenient for operation and installation, and quick and convenient installation.

[0029] The first and second edges 160, 170 are irregular, closed curves. This design enhances the piston's strength, prevents damage from pressure, and extends its service life. The heights of the first and second edges 160, 170 are the same as the height of the conical protrusion 120. This ensures that the installed sealing gasket is supported by the edges and conical protrusion 120, evenly distributing force and preventing deformation.

[0030] The first circular hole 140 and the second circular hole 150 are arranged along the same circumference, and the first circular hole 140 and the second circular hole 150 are staggered to ensure that when the sealing gasket is used to seal different hole positions, the force is evenly applied on the same circumference, thereby preventing the sealing gasket from warping and deformation. A first groove 180 is also provided on the front side 101 of the cover plate, and the second circular hole 150 is disposed within the first groove 180. A second groove 190 is also provided on the back side 102 of the cover plate, and the first circular hole 140 is disposed within the second groove 190. During use, the gap between the first groove 180, the second groove 190 and the installed seal can be connected to the solenoid valve chamber outside the piston to relieve pressure, prevent deformation of the seal, and extend the service life.

[0031] On the back surface 102 of the cover plate, a plurality of support protrusions 300 are provided inside the second peripheral edge 170. The height of the support protrusions 300 is the same as that of the second peripheral edge 170. The design of the support protrusions 300 improves the strength of the cover plate 100 and reduces damage. At the same time, the area supporting the sealing gasket is increased, ensuring the sealing effect of the sealing gasket inside the piston and preventing deformation.

[0032] The outer side of the cover wall 200 is provided with a fixed sealing sleeve 210 through a pressing tooth sleeve. It is firmly fixed to ensure good sealing between the outer side of the piston and the cavity wall to avoid leakage caused by movement of the outer side of the piston.

[0033] The second surrounding edge 170 is further provided with an air relief groove 171 near the second circular hole 150. The design of the air relief groove 171 is conducive to pressure relief and prevents deformation of the installed sealing member.

[0034] The cover body is made of an integrated connection. The guide tightening groove 110 can be directly formed on the powder metallurgy mold without additional cost. The cover body is strong and has a long service life.

[0035] The present invention has been described with reference to the above embodiments. However, these embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A piston for a solenoid valve, characterized in that: The cover body comprises a cover plate and a cover wall, the cover wall is a short cylinder with two ends open, and the cover plate is fixed on an end surface of one end of the cover wall; The cover plate includes a front side and a back side, and a guide screwing groove is provided on the edge of the front side of the cover plate; a frustum protrusion is symmetrically provided at the center of the front side and the back side, and a mounting hole is provided at the center of the cover plate that passes through the frustum protrusions on the front side and the back side; The cover plate is also provided with a first circular hole and a second circular hole passing through the front and back surfaces. The front surface of the cover plate is provided with a first surrounding edge, and the back surface of the cover plate is provided with a second surrounding edge. On the front surface of the cover plate, the first circular hole is on the inner side of the first surrounding edge, and the second circular hole is on the outer side of the first surrounding edge. On the back surface of the cover plate, the first circular hole is on the outer side of the second surrounding edge, and the second circular hole is on the inner side of the second surrounding edge.

2. A solenoid valve piston according to claim 1, characterized in that: The guide tightening groove is a right-angled trapezoidal groove, the groove opening of the guide tightening groove is larger than the groove bottom of the guide tightening groove, the tightening side of the guide tightening groove is one side of the right-angle side, and the other side of the guide tightening groove is an inclined surface.

3. The solenoid valve piston according to claim 1, wherein: There are at least three guide and tightening grooves, and the guide and tightening grooves are equidistantly arranged along the circumference of the cover plate.

4. The solenoid valve piston according to claim 1, wherein: The first surrounding edge and the second surrounding edge are in the shape of closed curves, and the heights of the first surrounding edge and the second surrounding edge are the same as the height of the frustum protrusion.

5. The solenoid valve piston according to claim 1, wherein: The first circular hole and the second circular hole are arranged along the same circumference. A first groove is provided on the front side of the cover plate, and the second circular hole is arranged in the first groove. A second groove is provided on the back side of the cover plate, and the first circular hole is arranged in the second groove.

6. The solenoid valve piston according to claim 1, wherein: On the reverse side of the cover plate, a plurality of supporting protrusions are further provided on the inner side of the second surrounding edge, and the height of the supporting protrusions is the same as that of the second surrounding edge.

7. The solenoid valve piston according to claim 1, wherein: The outer side of the cover wall is provided with a fixed sealing sleeve through a pressing tooth sleeve.

8. The solenoid valve piston according to claim 1, wherein: An air release groove is further provided on the second surrounding edge near the second circular hole.

9. The solenoid valve piston according to claim 1, wherein: The cover body is made by integral connection.

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