Precise riveting tool for iron core of electromagnetic valve

Abstract

The utility model discloses a precise riveting tool for an iron core of an electromagnetic valve. The precise riveting tool comprises an upper die, a lower die and a mounting groove. A plurality of pushing grooves communicating with the mounting groove are circumferentially formed in the side face of the lower die at equal intervals, and riveting blocks are slidably mounted in the pushing grooves; wherein a plurality of pushing blocks corresponding to the riveting blocks are arranged at the bottom end of the upper die, each pushing block is provided with a lower inclined surface, and in the die assembly process, the pushing blocks extrude the riveting blocks inwards, so that the riveting blocks conduct riveting at the same time; the pushing block is arranged, the sliding block can be pushed to slide towards the mounting groove at the same time during die assembly, the shell and the iron core are riveted, riveting accuracy is improved, quality problems are reduced, and the yield is improved; through the arrangement of the automatic lubricating structure, little self-lubrication of the sliding block can be achieved, friction loss of the sliding block is reduced, the service life is prolonged, through the arrangement of the adjusting structure, the position of the blocking piece is conveniently adjusted, the service life of the one-way circulation device is prolonged, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve assembly technology, and in particular to a precision riveting fixture for electromagnetic valve cores. Background Technology

[0002] A solenoid valve is an electromagnetically controlled industrial device, a fundamental component of automation used to control fluids. It belongs to the actuator category and is not limited to hydraulic or pneumatic systems. It is often used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. There are many types of solenoid valves, each designed for different circuits and functions at different points in the control system to achieve the desired control while ensuring accuracy and flexibility. Commonly used solenoid valves include check valves, safety valves, directional control valves, and speed control valves.

[0003] In existing technologies, the iron core and the outer shell are usually fastened together by riveting. This involves loading the product into a fixture and fastening it, turning on the power to rotate the riveting head, pressing down to rivet and wrap the product, and completing the process. However, the clamping and fixing of the workpiece requires strict requirements on the concentricity between the workpiece and the riveting head. This high-precision alignment requirement results in long changeover and debugging times, complex debugging procedures, and long processing times. Furthermore, the riveting head wears out quickly and needs to be replaced frequently, leading to high production costs. Summary of the Invention

[0004] This utility model aims to solve one of the technical problems existing in the prior art.

[0005] This application provides a precision riveting fixture for a solenoid valve core, including an upper die, a lower die, and a mounting groove; the lower die has a plurality of push grooves that are equally spaced on its side and communicate with the mounting groove, and each push groove has a riveting block slidably installed in it;

[0006] The upper mold has several pushing blocks at its bottom end that correspond to the riveting blocks. Each pushing block has a downward inclined surface. During the mold closing process, the pushing blocks will press the riveting blocks inward, so that several riveting blocks can rivet simultaneously.

[0007] Furthermore, the riveting block includes a sliding block, the sliding block having an arc-shaped groove at one end facing the mounting groove, and an upper inclined surface corresponding to the lower inclined surface at the other end facing away from the mounting groove.

[0008] The sliding block is slidably installed in the pushing groove.

[0009] Furthermore, the arc-shaped groove is provided with a chamfer.

[0010] Furthermore, the lower mold is provided with several oil storage tanks and several filling ports. The pushing groove is connected to the oil storage tank through an oil outlet channel. The oil storage tank is connected to the filling port through an oil inlet channel. A one-way flow structure is installed in the oil inlet channel.

[0011] The oil storage tank is equipped with an automatic lubrication structure that can push lubricating oil into the push groove.

[0012] Furthermore, the automatic lubrication structure includes an elastic silicone block, which is fixedly installed in the oil outlet channel and is used to restrict the flow of lubricating oil into the push groove;

[0013] The elastic silicone block has several circular holes that are in a closed state. The holes can be opened by the pusher and the pusher is reset by a spring.

[0014] Furthermore, the pushing component includes a sliding groove, in which a connecting rod is slidably installed, and a magnetic pushing block is fixedly connected to the connecting rod. The magnetic pushing block is slidably installed in the oil storage tank.

[0015] The push block is provided with a magnetic block that has the same magnetic poles as the magnetic push block, and the magnetic block can push the magnetic push block to slide toward the elastic silicone block.

[0016] Furthermore, the unidirectional flow structure includes a sliding block, the second sliding block being slidably installed in the oil inlet channel, the two ends of the second sliding block being fixedly installed with sealing plates, the inner side of the oil inlet channel being fixed with a top block, and the top end of the sealing plate abutting against the bottom end of the top block;

[0017] A fixing block is fixedly installed inside the oil inlet channel, and the position of the sliding block can be adjusted by the adjusting structure of the fixing block.

[0018] Furthermore, the adjustment structure includes a rotating groove on the fixed block, a rotating block is rotatably installed in the rotating groove, the top of the rotating block is provided with an internal hexagonal groove for easy rotation, and the lower end of the rotating block extends out of the fixed block and is threadedly connected to the sliding block.

[0019] Furthermore, the sliding block 2 is provided with a limiting groove, and the bottom end of the rotating block is provided with a limiting block, which is slidably installed in the limiting groove;

[0020] The limiting block can rotate within the limiting groove.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. By setting the push block, the sliding block is pushed to slide into the mounting groove during the mold closing process to rivet the outer shell and the iron core, which greatly improves the accuracy of riveting, reduces product quality problems caused by position deviation, and improves the product yield.

[0023] 2. By setting up an automatic lubrication structure, a small amount of self-lubrication can be achieved for the sliding block 2, reducing frictional loss and greatly increasing its service life. By adjusting the structure, the position of the sealing plate can be easily adjusted, which can extend the service life of the one-way flow device and reduce costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a precision riveting fixture for a solenoid valve core in an embodiment of this application;

[0025] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction;

[0026] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the lower and middle molds along the BB direction;

[0027] Figure 4 for Figure 2 Enlarged structural diagram at point C;

[0028] Figure 5 for Figure 4 A magnified structural diagram at point D.

[0029] Figure Labels

[0030] 1-Upper mold, 11-Push block, 12-Lower inclined surface, 13-Magnetic block, 2-Lower mold, 21-Push groove, 22-Riveting block, 221-Sliding block one, 222-Arc groove, 223-Upper inclined surface, 224-Chamfer, 3-Mounting groove, 4-Oil reservoir, 51-Oil outlet channel, 52-Oil inlet channel, 6-Automatic lubrication structure, 61-Elastic silicone block, 62-Round hole, 63-Pushing component, 631-Sliding groove, 632-Connecting rod, 633-Magnetic push block, 64-Spring, 7-Oil filling port, 8-One-way flow structure, 81-Sliding block two, 82-Sealing piece, 83-Top block, 84-Fixing block, 9-Adjusting structure, 91-Rotating groove, 92-Rotating block, 93-Internal hexagonal groove, 94-Limiting block, 95-Limiting groove. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0032] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] The following description, in conjunction with the accompanying drawings, details a precision riveting fixture for a solenoid valve core provided in this application through specific embodiments and application scenarios.

[0034] Example 1:

[0035] like Figures 1 to 3 As shown in the figure, this application provides a precision riveting fixture for a solenoid valve core, including an upper mold 1, a lower mold 2, and a mounting groove 3; the lower mold 2 has a plurality of push grooves 21 arranged circumferentially at equal intervals on its side, which are connected to the mounting groove 3, and each push groove 21 has a riveting block 22 slidably installed in it; the bottom end of the upper mold 1 is provided with a plurality of push blocks 11 corresponding to the riveting blocks 22, and each push block 11 has a lower inclined surface 12. During the mold closing process, the push blocks 11 will press the riveting blocks 22 inward, so that the plurality of riveting blocks 22 will rivet simultaneously.

[0036] Furthermore, the rivet block 22 includes a sliding block 221. The end of the sliding block 221 facing the mounting groove 3 is provided with an arc-shaped groove 222, and the end of the sliding block 221 facing away from the mounting groove 3 is provided with an upper inclined surface 223 corresponding to the lower inclined surface 12. The sliding block 221 is slidably installed in the push groove 21.

[0037] Furthermore, the arc-shaped groove 222 is provided with a chamfer 224.

[0038] In this embodiment of the application, due to the above-described structure, by placing the shell and iron core to be riveted in the mounting groove 3, the mounting groove 3 will align the center of the shell and the iron core. The tooling is activated, and the upper mold 1 closes downward. During this process, the lower inclined surfaces 12 on the eight pushing blocks 11 will respectively fit with the upper inclined surfaces 223 on the eight sliding blocks 221, and simultaneously push the eight sliding blocks 221 to slide in the direction of the mounting groove 3 to rivet the shell and the iron core. This greatly improves the accuracy of riveting, reduces product quality problems caused by positional deviation, and improves the product yield. After riveting is completed, the upper mold 1 is reset, and the riveted shell and iron core are taken out. During the removal process, the riveting block 22 can be reset by the chamfer 224.

[0039] Example 2:

[0040] like Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the lower mold 2 is provided with a plurality of oil storage tanks 4 and a plurality of oil filling ports 7. The push groove 21 is connected to the oil storage tanks 4 through an oil outlet channel 51, and the oil storage tanks 4 are connected to the oil filling ports 7 through an oil inlet channel 52. A one-way flow structure 8 is installed in the oil inlet channel 52. The oil storage tanks 4 are provided with an automatic lubrication structure 6, which can push lubricating oil into the push groove 21.

[0041] Furthermore, the automatic lubrication structure 6 includes an elastic silicone block 61, which is fixedly installed in the oil outlet channel 51. The elastic silicone block 61 is used to restrict the flow of lubricating oil into the push groove 21. The elastic silicone block 61 is provided with a plurality of round holes 62 in a closed state. The round holes 62 can be opened by the pusher 63, and the pusher 63 is reset by the spring 64.

[0042] Furthermore, the pushing member 63 includes a sliding groove 631, in which a connecting rod 632 is slidably installed. A magnetic pushing block 633 is fixedly connected to the connecting rod 632, and the magnetic pushing block 633 is slidably installed in the oil storage tank 4. The pushing block 11 is provided with a magnetic block 13 that has the same magnetic poles as the magnetic pushing block 633, and the magnetic block 13 can push the magnetic pushing block 633 to slide toward the elastic silicone block 61.

[0043] Furthermore, the unidirectional flow structure 8 includes a second sliding block 81, which is slidably installed in the oil inlet channel 52. Sealing plates 82 are fixedly installed at both ends of the second sliding block 81. A top block 83 is fixedly installed on the inner side of the oil inlet channel 52, with the top end of the sealing plate 82 abutting against the bottom end of the top block 83. A fixing block 84 is fixedly installed inside the oil inlet channel 52, and the position of the second sliding block 81 can be adjusted by the adjusting structure 9.

[0044] Furthermore, the adjustment structure 9 includes a rotating groove 91 on the fixed block 84. A rotating block 92 is rotatably installed in the rotating groove 91. The top of the rotating block 92 is provided with an internal hexagonal groove 93 for easy rotation. The lower end of the rotating block 92 extends out of the fixed block 84 and is threadedly connected to the sliding block 81.

[0045] Furthermore, the sliding block 81 is provided with a limiting groove 95, and the bottom end of the rotating block 92 is provided with a limiting block 94, which is slidably installed in the limiting groove 95; wherein, the limiting block 94 can rotate within the limiting groove 95.

[0046] In this embodiment of the application, due to the above-described structure, when the upper mold 1 and the lower mold 2 are closed, the magnetic block 11 will push the magnetic push block 633 to slide towards the elastic silicone block 61 and stretch the spring 64. During the sliding process, due to the restriction of the one-way flow structure 8, the lubricating oil cannot flow into the oil inlet channel 52. The sliding of the magnetic push block 633 will push the lubricating oil into the oil outlet channel 51 and open the originally closed circular hole 62 through pressure, so that the lubricating oil in the oil storage tank 4 flows into the push groove 21, realizing the lubrication between the push groove 21 and the sliding block 221, reducing the frictional loss of the sliding block 221, and greatly increasing the service life of the sliding block 221.

[0047] Because the inner diameter of the round hole 62 is small after it is opened, the sliding block 221 can be self-lubricated during long-term operation, without the need to frequently add lubricating oil to the oil filler port.

[0048] When the lubricating oil inside the oil reservoir 4 is consumed to a certain extent, lubricating oil can be added into the oil inlet channel 52 by opening the oil filling port 7. The sealing plate 82 will undergo a certain elastic deformation due to the impact of the lubricating oil. At this time, the sealing plate 82 separates from the top block 83, and the lubricating oil flows into the oil reservoir 4. After the addition is completed, the sealing plate 82 elastically recovers and abuts against the top block 83 again. When the upper mold 1 and the lower mold 2 are closed, the lubricating oil pushes the sealing plate 82 upward, so that the sealing plate 82 and the top block 83 abut tightly together, which can prevent the lubricating oil from flowing out.

[0049] When the sealing plate 82 has a certain gap between it and the top block 83 due to long-term use, the rotating block 92 can be rotated by using an Allen wrench. The rotation of the rotating block 92 will cause the sliding block 81 to slide upward, so that the sealing plate 82 will re-abut against the top block 83. This makes it easier to adjust the position of the sealing plate 82, extend the service life of the one-way flow device 8, and reduce costs.

[0050] A limiting groove 95 is provided on the sliding block 2 81, and a limiting block 94 is provided at the bottom of the rotating block 92. The limiting block 94 is slidably installed in the limiting groove 95. The limiting block 94 can prevent the sliding block 2 81 from accidentally falling off during the adjustment process. The limiting block 94 can rotate within the limiting groove 95 and will not affect the rotation of the rotating block 92.

[0051] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0052] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A precision riveting fixture for a solenoid valve core, comprising an upper mold (1), a lower mold (2), and a mounting groove (3), characterized in that, The lower mold (2) has several push grooves (21) that are connected to the mounting groove (3) and are circumferentially arranged at equal intervals on its side. Each push groove (21) has a rivet block (22) that is slidably installed inside it. The bottom end of the upper mold (1) is provided with a number of push blocks (11) corresponding to the riveting block (22). The push block (11) is provided with a lower inclined surface (12). During the mold closing process, the push block (11) will press the riveting block (22) inward, so that the riveting blocks (22) will rivet simultaneously.

2. The precision riveting fixture for a solenoid valve core according to claim 1, characterized in that, The rivet block (22) includes a sliding block (221). The sliding block (221) has an arc groove (222) at one end facing the mounting groove (3), and an upper inclined surface (223) corresponding to the lower inclined surface (12) at the other end facing away from the mounting groove (3). The sliding block (221) is slidably installed in the push groove (21).

3. The precision riveting fixture for a solenoid valve core according to claim 2, characterized in that, The arc-shaped groove (222) is provided with a chamfer (224).

4. The precision riveting fixture for a solenoid valve core according to claim 1, characterized in that, The lower mold (2) is provided with several oil storage tanks (4) and several oil filling ports (7). The push groove (21) is connected to the oil storage tank (4) through the oil outlet channel (51). The oil storage tank (4) is connected to the oil filling port (7) through the oil inlet channel (52). A one-way flow structure (8) is installed in the oil inlet channel (52). The oil storage tank (4) is equipped with an automatic lubrication structure (6), which can push lubricating oil into the push groove (21).

5. The precision riveting fixture for a solenoid valve core according to claim 4, characterized in that, The automatic lubrication structure (6) includes an elastic silicone block (61), which is fixedly installed in the oil outlet channel (51) and is used to restrict the flow of lubricating oil into the push groove (21). The elastic silicone block (61) is provided with several round holes (62) in a closed state. The round holes (62) can be opened by a pusher (63), and the pusher (63) is reset by a spring (64).

6. The precision riveting fixture for a solenoid valve core according to claim 5, characterized in that, The pusher (63) includes a sliding groove (631), a connecting rod (632) is slidably installed in the sliding groove (631), a magnetic push block (633) is fixedly connected to the connecting rod (632), and the magnetic push block (633) is slidably installed in the oil storage tank (4). The push block (11) is provided with a magnetic block (13) that has the same magnetic pole as the magnetic push block (633). The magnetic block (13) can push the magnetic push block (633) to slide toward the elastic silicone block (61).

7. The precision riveting fixture for a solenoid valve core according to claim 4, characterized in that, The unidirectional flow structure (8) includes a second sliding block (81), which is slidably installed in the oil inlet channel (52). Both ends of the second sliding block (81) are fixedly installed with sealing pieces (82), and a top block (83) is fixedly installed on the inner side of the oil inlet channel (52). The top end of the sealing piece (82) abuts against the bottom end of the top block (83). The oil inlet channel (52) is fixedly installed with a fixing block (84), and the position of the sliding block (81) can be adjusted by the adjusting structure (9).

8. The precision riveting fixture for a solenoid valve core according to claim 7, characterized in that, The adjustment structure (9) includes a rotating groove (91) on the fixed block (84). A rotating block (92) is rotatably installed in the rotating groove (91). The top of the rotating block (92) is provided with an internal hexagonal groove (93) for easy rotation. The lower end of the rotating block (92) extends out of the fixed block (84) and is connected to the sliding block (81) by a thread.

9. A precision riveting fixture for a solenoid valve core according to claim 8, characterized in that, The sliding block 2 (81) is provided with a limiting groove (95), and the bottom end of the rotating block (92) is provided with a limiting block (94), and the limiting block (94) is slidably installed in the limiting groove (95). The limiting block (94) can rotate within the limiting groove (95).

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