Electromagnetic cylinder and assembling tool thereof

Abstract

The application discloses an electromagnetic cylinder and an assembling tool thereof, wherein the electromagnetic cylinder comprises a support part, a magnetic core part and a circuit part; the support part comprises a U-shaped yoke, a yoke plate and a static core; the magnetic core part comprises a wire holder, a push rod, a moving core, a coil and an elastic component; the circuit part comprises a PCB, a terminal and a shell; the PCB is electrically connected with the coil through the terminal; when the coil is electrified, the moving core is attracted and pulls the push rod to move close to the static core; when the coil is de-energized, the moving core is released and the push rod is reset by the elastic component; the electromagnetic cylinder is compact in structure, which is beneficial to reducing the volume of the electromagnetic cylinder; moreover, the assembling of the PCB forms a stable mounting structure of three-point fixed connection, which is beneficial to improving the reliability; in addition, since the connecting modes of the components are cutting riveting, expanding riveting, buckling and sleeving, no thread hole is used, the process cost is reduced, the structure is simplified, the volume is reduced, and the electromagnetic cylinder is suitable for industrial mass production.

Description

Technical Field

[0001] This invention belongs to the field of reciprocating motion devices, specifically relating to an electromagnetic cylinder and its assembly fixture. Background Technology

[0002] With the miniaturization and intelligentization of automated equipment, industrial production places higher demands on the size, performance, and controllability of actuators. Reciprocating motion devices are mainly of two types: pneumatic and magnetic. Pneumatic reciprocating cylinders have disadvantages such as complex structure, bulky size, and high requirements for airtightness. Magnetic cylinders, on the other hand, have a simple structure, small size, and are easy to use, making them well-suited for confined spaces and high precision operating conditions.

[0003] Existing magnetic drive devices are widely used, but they have the following drawbacks: 1. The structural design is not compact enough, making it difficult to meet the development needs of miniaturization; 2. Most of them use threaded fastening, resulting in high production costs. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to overcome at least one of the defects in the prior art and to provide an electromagnetic cylinder and its assembly tooling that can reduce volume, improve assembly efficiency and reduce cost.

[0005] As a first aspect of the present invention, the provided embodiment of the electromagnetic cylinder is as follows:

[0006] An electromagnetic cylinder, comprising:

[0007] The support part 1 includes a U-shaped yoke 11, a yoke plate 12 and a stationary iron core 13. The two sides of the yoke plate 12 are riveted to the two longitudinal branches 111 and 112 of the U-shaped yoke 11 to form a window. The stationary iron core 13 is riveted to the horizontal branch 113 of the U-shaped yoke 11.

[0008] The magnetic core section 2 includes a wire frame 21, a push rod 22, a moving iron core 23, a coil 25, and an elastic component 26. The wire frame 21 includes a cavity component 211 and a first baffle 212 and a second baffle 213 disposed at both ends of the cavity component 211. A receiving space is formed in the cavity component 211. The first baffle 212 is fixed against the horizontal branch 113 of the U-shaped yoke 11. The second baffle 213 is fixedly engaged with the two longitudinal branches 111 of the U-shaped yoke 11. 112, such that the wire frame 21 is located on one side of the window, the stationary iron core 13 is placed on one side of the accommodating space, the coil 25 is wound around the outer wall of the cavity component 211, the push rod 22 passes through the stationary iron core 13 and is fixedly connected to the first end 231 of the moving iron core 23, the second end 232 of the moving iron core 23 passes through the yoke plate 12, and the elastic component 26 is located between the second baffle 213 and the yoke plate 12 and is sleeved on the outer surface of the moving iron core 23;

[0009] The circuit part 3 includes a PCB board 31, terminals 32 and a housing 33. The terminals 32 are located at the first end 311 of the PCB board 31. The terminals 32 are inserted into the first baffle 212 to achieve a fixed snap-fit ​​connection. The second end 312 of the PCB board 31 is snapped into the groove 214 of the second baffle 213. The housing 33 is snap-fitted to the U-shaped yoke 11.

[0010] The PCB board 31 is electrically connected to the coil 25 through the terminal 32. When the coil 25 is energized, the moving iron core 23 is attracted, pulling the push rod 22 closer to the stationary iron core 13. When the coil 25 is de-energized, the moving iron core 23 is released, and the push rod 22 is reset by the elastic component 26.

[0011] Furthermore, the magnetic core portion 2 also includes a sleeve 24, which is riveted to the inner wall of the cavity component 211 to form the accommodating space.

[0012] Furthermore, the U-shaped yoke 11 has a bending notch 114 at the bend.

[0013] Furthermore, dovetail grooves 121 are formed at both ends of the yoke plate 12.

[0014] Furthermore, the wire frame 21 is provided with a foolproof post 215.

[0015] As a second aspect of the present invention, an embodiment of the provided electromagnetic cylinder assembly fixture is as follows:

[0016] An assembly fixture, suitable for assembling the electromagnetic cylinder described in the first aspect above, comprising:

[0017] The fixing block 45 is used to place the stationary iron core 13 and the U-shaped yoke 11;

[0018] The stationary iron core punch 43, by applying pressure to its first end, can radially expand the outer wall of the through hole in the stationary iron core 13 and fasten it to the inner wall of the through hole of the horizontal branch of the U-shaped yoke 11, thereby realizing the expansion and riveting connection.

[0019] Furthermore, the diameter of the stationary iron core punch 43 is 1-1.5 mm larger than the inner diameter of the stationary iron core 13, and the second end of the stationary iron core punch 43 has a chamfer of 45°.

[0020] As a third aspect of the present invention, an embodiment of the provided electromagnetic cylinder assembly fixture is as follows:

[0021] An assembly fixture, applicable to the assembly of the electromagnetic cylinder with the sleeve 24 added in the first aspect described above, comprising:

[0022] U-shaped base 41 is used to place the U-shaped yoke 11, the wire frame 21 and the sleeve 24. The U-shaped yoke 11 has been assembled with the stationary iron core 13.

[0023] The sleeve punch 44, by applying pressure to its first end, can radially expand the outer wall of the sleeve 24 and tightly fit it with the inner wall of the cavity component 211 of the wire frame 21, thereby realizing the expansion and riveting connection.

[0024] Furthermore, the diameter of the sleeve punch 44 is 1-1.5 mm larger than the inner diameter of the sleeve 24, and the second end of the sleeve punch 44 has a chamfer of 30°.

[0025] As a fourth aspect of the present invention, an embodiment of the electromagnetic cylinder assembly fixture is provided as follows:

[0026] An assembly fixture, suitable for assembling the electromagnetic cylinder described in the first aspect above, includes:

[0027] U-shaped base 41, used to place the U-shaped yoke 11;

[0028] The U-shaped yoke riveting cutter 42 has two blades at its second end. By applying pressure to the first end of the U-shaped yoke riveting cutter 42, two pieces of material can be cut out from the ends of the two longitudinal branches 111 and 112 of the U-shaped yoke 11 and squeezed into the middle notch, thereby locking the extension of the yoke plate 12 located in the notch and realizing the riveting connection.

[0029] The beneficial effects of this invention are as follows: the first end 311 of the PCB board 31 is fixedly snapped into the first baffle 212 of the coil 25 by inserting the terminal 32 into it, and the second end 312 of the PCB board 31 is fixedly snapped into the groove 214 of the second baffle 213 of the coil 25 by pushing it into it. This not only makes the structure of the electromagnetic cylinder compact and helps to reduce the size of the electromagnetic cylinder, but also makes the assembly of the PCB board form a stable installation structure with three fixed connections, which helps to improve the reliability of the electromagnetic cylinder. In addition, since the connection methods of each component are riveting, expanding riveting, snapping, and sleeve connection, and no threaded holes are used, the process cost is reduced, the structure is simplified, and the size is reduced, making it suitable for large-scale industrial production. Attached Figure Description

[0030] Figure 1 This is one of the assembled views of the electromagnetic cylinder according to an embodiment of the present invention; Figure 2 This is a second view of the assembled electromagnetic cylinder according to an embodiment of the present invention;

[0031] Figure 3 This is a cross-sectional view of the electromagnetic cylinder assembly according to an embodiment of the present invention;

[0032] Figure 4 This is an exploded view of the electromagnetic cylinder according to an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the assembly tooling for riveting and assembling the stationary iron core and the horizontal branch of the U-shaped yoke in an embodiment of the present invention.

[0034] Figure 6 This is a schematic diagram of the assembly tooling for riveting and fitting the pipes and wire rack cavity according to an embodiment of the present invention.

[0035] Figure 7 This is a schematic diagram of the assembly tooling for riveting and assembling the U-shaped yoke and yoke plate according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the dovetail groove on the yoke plate of the electromagnetic cylinder in an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the assembly and installation of the remaining parts of the electromagnetic cylinder according to an embodiment of the present invention;

[0037] Figure 10 for Figure 9 A magnified view of a portion of the middle wedge block.

[0038] The above figures include the following reference numerals:

[0039] 1. Support section, 11. U-shaped yoke, 111, 112. Longitudinal branch, 113. Horizontal branch, 114. Bending notch, 115. Mounting hole, 116. Mounting groove, 117. Undercut hole, 118. Semicircular hole, 12. Yoke plate, 121. Dovetail groove, 13. Stationary iron core;

[0040] 2. Magnetic core section, 21. Wire frame, 211. Cavity component, 212. First baffle, 213. Second baffle, 214. Groove, 215. Anti-fooling post, 216. Wedge block, 217. Spring groove, 22. Push rod, 221. Boss, 23. Moving iron core, 231. First end of moving iron core, 232. Second end of moving iron core, 24. Sleeve, 25. Coil, 26. Elastic component, 261. Telescopic part, 262. Snap-fit ​​part;

[0041] 3. Circuit section, 31. PCB board, 311. First end of PCB board, 312. Second end of PCB board, 313. Outlet hole, 314. Terminal hole, 32. Terminal, 33. Housing, 331. Inverted;

[0042] 41. U-shaped base, 42. U-shaped yoke riveting tool, 43. stationary iron core punch, 44. sleeve punch, 45. fixing block. Detailed Implementation

[0043] The present invention and its beneficial effects will be further described in detail below with reference to specific embodiments and accompanying drawings. However, the specific embodiments of the present invention are not limited thereto.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0045] Unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0046] In this invention, unless otherwise stated, directional terms such as "up," "down," "left," and "right" are generally used in relation to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational orientation of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0047] Figure 1 This is one of the assembled views of the electromagnetic cylinder according to an embodiment of the present invention; Figure 2 This is a second view of the assembled electromagnetic cylinder according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the electromagnetic cylinder assembly according to an embodiment of the present invention; Figure 4 The exploded view of the electromagnetic cylinder according to an embodiment of the present invention is shown below. Figures 1 to 4 The electromagnetic cylinder includes:

[0048] An electromagnetic cylinder, characterized in that it comprises:

[0049] The support part 1 includes a U-shaped yoke 11, a yoke plate 12 and a stationary iron core 13. The two sides of the yoke plate 12 are riveted to the two longitudinal branches 111 and 112 of the U-shaped yoke 11 to form a window. The stationary iron core 13 is riveted to the horizontal branch 113 of the U-shaped yoke 11.

[0050] The magnetic core part 2 includes a wire frame 21, a push rod 22, a moving iron core 23, a coil 25, and an elastic component 26. The wire frame 21 includes a cavity component 211 and a first baffle 212 and a second baffle 213 disposed at both ends of the cavity component 211. A receiving space is formed in the cavity component 211. The first baffle 212 is fixed against the horizontal branch 113 of the U-shaped yoke 11. The second baffle 213 is fixedly engaged with the two longitudinal branches 111 and 112 of the U-shaped yoke 11, so that the wire frame 21 is located on one side of the window. The stationary iron core 13 is placed in one side of the cavity component 211. The coil 25 is wound around the outer wall of the cavity component 211. The push rod 22 passes through the stationary iron core 13 and is fixedly connected to the first end 231 of the moving iron core 23. The second end 232 of the moving iron core 23 passes through the yoke plate 12. The elastic component 26 is located between the second baffle 213 and the yoke plate 12 and is sleeved on the outer surface of the moving iron core 23.

[0051] The circuit part 3 includes a PCB board 31, terminals 32 and housing 33. Terminals 32 are located at the first end 311 of the PCB board 31. After the terminals 32 are inserted into the first baffle 212, they are fixedly snapped together. The second end 312 of the PCB board 31 is snapped into the groove 214 of the second baffle 213. The housing 33 is snapped together with the U-shaped yoke 11.

[0052] The PCB board 31 is electrically connected to the coil 25 through the terminal 32. When the PCB board 31 is powered on, it outputs current to the terminal 32, the coil 25 is energized, the moving iron core 23 is attracted, and the push rod 22 is pulled close to the stationary iron core 13 to complete the pushing action. When the PCB board 31 is de-energized, the coil 25 is de-energized, the moving iron core 23 is released, and the push rod 22 is reset by the elastic component (26) to complete the return action.

[0053] The outer diameter of the stationary iron core 13 is larger than that of the moving iron core 23, thus limiting the movement of the moving iron core 23 towards the stationary iron core 13. The push rod 22 has a boss 221 with a diameter larger than that of the lower end of the stationary iron core 13, thus limiting the movement of the moving iron core 23 away from the stationary iron core 13 when it resets. This allows the first end 231 of the moving iron core to... Figure 3 It reciprocates within the S region.

[0054] The elastic component 26 includes a telescopic part 261 and a snap-fit ​​part 262. The telescopic part 261 is sleeved on the outer surface of the moving iron core 23 through the snap-fit ​​part 262. The snap-fit ​​part 262 snaps into a groove near the second end 232 of the moving iron core. The snap-fit ​​part 262 is located within the aforementioned accommodating space and abuts against the first baffle 212. The purpose of setting the snap-fit ​​part 262 is to fix the upper end of the telescopic part 261 onto the snap-fit ​​part 262, so that the telescopic part 261 can be stretched and compressed when the moving iron core 23 is attracted and released. The telescopic part 261 can be a component that can achieve stretching and compression, such as a spring, and the snap-fit ​​part can be a component that can achieve snap-fit ​​fixation, such as a snap ring.

[0055] The fixed connection between the push rod 22 and the first end 231 of the moving iron core 23 can be achieved by a threaded connection. How to achieve this can be selected by those skilled in the art as needed, and this invention does not impose any restrictions.

[0056] Furthermore, the magnetic core part 2 also includes a sleeve 24. The sleeve 24 is riveted to the inner wall of the cavity part 211 to form the aforementioned accommodating space. The purpose of adding the sleeve 24 to the inner wall of the wire frame 21 is to reduce the friction between the moving iron core and the wire frame, reduce energy consumption, and shorten the response time. The sleeve 24 can be a hollow part such as a brass tube. Those skilled in the art can choose the specific part as needed, and the present invention does not limit it.

[0057] Furthermore, the U-shaped yoke 11 has a bending notch 114 at the bend (and at the junction of the longitudinal branch 111 / 112 and the horizontal branch 113) to avoid stress concentration and excessive deformation of pure iron when the U-shaped yoke 11 is bent.

[0058] The assembly steps of the electromagnetic cylinder in this embodiment of the invention are as follows:

[0059] (1) The static iron core 13 is assembled with the U-shaped yoke horizontal branch 113 using a riveting process, which will be described in detail below.

[0060] (2) Assembly of the wire frame 21: Insert the wire frame 21 into the opening along the U-shaped yoke 11, so that the first baffle 212 of the wire frame abuts against the horizontal branch 113 of the U-shaped yoke 11 for fixation. Then, fix the second baffle 213 of the wire frame to the two longitudinal branches 111 and 112 of the U-shaped yoke 11, so that the wire frame 21 is located on the window side and the stationary iron core 13 is located on the accommodating space side. The fixation of the second baffle 213 of the wire frame to the two longitudinal branches 111 and 112 of the U-shaped yoke 11 can be achieved by wedge blocks and notch structures, which will be described in detail below.

[0061] (3) The assembly of the sleeve 24 and the cavity component 211 of the wire frame adopts the riveting process, which will be described in detail below;

[0062] (4) Assembly of push rod 22, moving iron core 23, coil 25 and elastic component 26: First, insert the first end 231 of moving iron core 23 into the above-mentioned accommodating space, then pass push rod 22 through the through hole in U-shaped yoke horizontal branch 113 and stationary iron core 13, and complete the fixed connection between push rod 22 and the first end 231 of moving iron core 23. Finally, fit elastic component 26 at the second end 232 of moving iron core 23.

[0063] (5) The U-shaped yoke 11 and the yoke plate 12 are assembled using a riveting process, which will be described in detail below.

[0064] (6) The assembly of the circuit part will be introduced in conjunction with the assembly of the wire frame 21, etc.

[0065] Figure 5 This is a schematic diagram of the assembly fixture for riveting and assembling the stationary iron core and the horizontal branch of the U-shaped yoke according to an embodiment of the present invention. The assembly fixture includes:

[0066] The fixing block 45 is used to place the stationary iron core 13 and the U-shaped yoke 11;

[0067] The stationary iron core punch 43, by applying pressure to its first end, can radially expand the outer wall of the central through hole of the stationary iron core 13 and tightly fit it with the inner wall of the through hole of the horizontal branch of the U-shaped yoke 11, thereby achieving an expanded riveting connection.

[0068] Preferably, the diameter of the stationary iron core punch 43 is 1-1.5 mm larger than the inner diameter of the stationary iron core 13, and the second end of the stationary iron core punch 43 has a chamfer of 45°.

[0069] Please see Figure 5 When assembling the stationary iron core 13 and the horizontal branch 113 of the U-shaped yoke 11, the stationary iron core 13 and the U-shaped yoke 11 are placed upside down above the fixing block 45. The stationary iron core punch 43 is placed on the outer wall of the through hole in the stationary iron core 13 for expansion and riveting. The outer wall of the through hole in the stationary iron core 13 is expanded by 0.8-1.2mm, so that the outer wall of the through hole in the stationary iron core 13 is tightly fitted with the inner wall of the through hole of the horizontal branch of the U-shaped yoke 11, thus realizing the expansion and riveting connection.

[0070] Figure 6 This is a schematic diagram of the assembly fixture for riveting and fitting the pipe and wire rack cavity according to an embodiment of the present invention. The assembly fixture includes:

[0071] U-shaped base 41 is used to place the U-shaped yoke 11, wire frame 21 and sleeve 24. The U-shaped yoke 11 has been assembled with the stationary iron core 13.

[0072] The sleeve punch 44, by applying pressure to its first end, can radially expand the outer wall of the sleeve 24 and tightly fit it with the inner wall of the cavity component 211 of the wire frame 21, thereby achieving an expanded riveting connection.

[0073] Preferably, the diameter of the stationary iron core punch 43 is 1-1.5 mm larger than the inner diameter of the stationary iron core 13, and the second end of the stationary iron core punch 43 has a chamfer of 45°.

[0074] Please see Figure 6 When assembling the sleeve 24 with the cavity component 211 of the wire frame, the sleeve 24 is sleeved with the cavity component 211 of the wire frame, the wire frame 21 is sleeved with the U-shaped yoke 11, the U-shaped yoke 11 is placed in the U-shaped tooling U-shaped base 41, the sleeve punch 44 is placed above the brass sleeve 24 for riveting, and the outer wall of the sleeve 24 is expanded by 0.8-1.2mm.

[0075] Advantageously, when assembling the sleeve 24 with the cavity component 211 of the wire frame, the sleeve 24 is first inserted into the cavity component 211 of the wire frame. The upper end of the sleeve 24 is 1-1.5mm higher than the upper plane of the second baffle 213 of the wire frame. Only by protruding a certain height can the outer wall of the sleeve 24 be expanded to achieve the expansion and riveting connection.

[0076] Figure 7 This is a schematic diagram of the assembly tooling for riveting and assembling the U-shaped yoke and yoke plate according to an embodiment of the present invention; the assembly tooling includes:

[0077] U-shaped base 41, used to place the U-shaped yoke 11;

[0078] The U-shaped yoke riveting cutter 42 has two blades at its second end. By applying pressure to the first end of the U-shaped yoke riveting cutter 42, two pieces of material can be cut out from the ends of the two longitudinal branches 111 and 112 of the U-shaped yoke 11 and squeezed into the middle notch, thereby locking the extension of the yoke plate 12 located in the notch and realizing the riveting connection.

[0079] Preferably, the U-shaped yoke riveting tool 42 has a cutting angle of 30° and a chamfered edge.

[0080] Please see Figure 7 When assembling the U-shaped yoke 11 and the yoke plate 12, the U-shaped yoke 11 is placed in the square groove of the U-shaped base 41; then the yoke plate 12 is placed in the notches at the ends of the two longitudinal branches 111 and 112 of the U-shaped yoke 11; the U-shaped yoke riveting knife 42 cuts downwards in the middle, cutting out two pieces of material of about 1mm at the ends of the two longitudinal branches 111 and 112 of the U-shaped yoke 11 and squeezing them into the notches in the middle, so as to fasten the yoke plate 12 and the U-shaped yoke 11.

[0081] It should be noted that when the U-shaped yoke 11 is assembled with the yoke plate 12, the stationary iron core 13, wire frame 21, sleeve 24, moving iron core 23 and elastic component 26 are already assembled inside the U-shaped yoke 11. Since the second end 232 of the stationary iron core 23 needs to pass through the yoke plate 12, an clearance opening for accommodating the second end 232 of the stationary iron core 23 needs to be opened on the U-shaped yoke riveting tool 42.

[0082] Preferably, the notches at the ends of the two longitudinal branches 111 and 112 of the U-shaped yoke 11 are each designed with two semi-circular holes 118 to avoid affecting the fit between the yoke plate 12 and the U-shaped yoke 11.

[0083] Advantageously, the yoke plate 12 has a dovetail groove 121, and a space is reserved to accommodate the material cut from the ends of the two longitudinal branches 111 and 112 of the U-shaped yoke 11 and extruded into the middle notch. Figure 8 The diagram shows a dovetail groove on the yoke plate of the electromagnetic cylinder according to an embodiment of the present invention. The dovetail groove 121 forms an extension of the yoke plate 12 located in the notch of the longitudinal branch 111 / 112 of the U-shaped yoke 11. The dovetail groove 121 has a structure that is smaller inside and larger outside, which is beneficial for further fastening the yoke plate 12 to the U-shaped yoke 11.

[0084] Figure 9 For the assembly diagram and installation and usage diagram of the remaining parts of the electromagnetic cylinder according to an embodiment of the present invention, please refer to [link / reference]. Figure 9 The wire frame 21 is installed in the window formed by the U-shaped yoke 11 and the yoke plate. A wedge block 216 is provided on the second baffle 213 of the wire frame 21 (see enlarged view for details). Figure 10 The U-shaped yoke 11 is positioned with the wedge to restrict the movement of the wire frame 21 along its axis. The wedge block 216 protrudes 0.3-0.5mm and has a spring groove 217 on the same side. When the wire frame 21 moves toward the horizontal branch 113 of the U-shaped yoke, it can provide springback allowance for the wedge block 216. The spring groove 217 is 0.5-0.8mm wide. One end of the terminal 32 is provided with a barb structure. After being inserted into the first baffle 212 of the wire frame 21, it is fixedly engaged in the first baffle 212. The other end of the terminal 32 is inserted into the terminal hole 312 of the PCB board 31 and fixed with solder. The coil 25 leads out an enameled wire and connects to the terminal 32. Thus, the first end 311 of the PCB board 31 is electrically connected to the coil 25 through the terminal 32. The PCB board 31 has two wire outlet holes 313 for leading out two wires. The external power supply supplies power to the PCB board 31 through these two wires, so that the PCB board 31 supplies power to the coil 25.

[0085] Please continue reading Figure 9The second baffle 213 of the wire frame is provided with a groove 214, which is locked and fixed to the second end 312 of the PCB board 31. Since the terminal 32 achieves the fixation between the first end 311 of the PCB board 31 and the first baffle 212 of the wire frame, a stable installation structure with a three-point fixed connection between the PCB board 31 and the wire frame 31 is formed. The outer side of the groove 214 is set as a slope, which is conducive to pushing the PCB board 31 into place. The wire frame 21 is provided with a foolproof post 215, and the PCB board 31 has a corner notch, which is useful for assembly. When the anti-misfit post 215 is inserted into the notch, it achieves the anti-misfit function and prevents the two sides of the PCB board 31 with components from being assembled incorrectly. The anti-misfit post can be positioned, for example, at the edge of the first end 311 of the PCB board 31. After the PCB board 31 is assembled, the outer shell 33 is fixedly connected to the undercut holes 117 on the U-shaped yoke 11 through the four undercuts 331 provided thereon. The undercuts 331 protrude 0.3-0.5mm. The PCB board 31 has a space margin of 1-3mm at the front and back for component arrangement.

[0086] Please continue reading Figure 9 The installation and use method of this invention embodiment is as follows: the U-shaped yoke 11 is provided with a mounting hole 115 and a mounting groove 116, the mounting hole 115 and the mounting groove 116 are vertically parallel, and a screw is installed in each for positioning. The mounting hole 115 and the mounting groove 116 cooperate to achieve adaptive installation size.

[0087] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. An electromagnetic cylinder, characterized in that, include: The support part (1) includes a U-shaped yoke (11), a yoke plate (12) and a stationary iron core (13). The two sides of the yoke plate (12) are riveted to the two longitudinal branches (111, 112) of the U-shaped yoke (11) to form a window. The stationary iron core (13) is riveted to the horizontal branch (113) of the U-shaped yoke (11). The magnetic core part (2) includes a wire frame (21), a push rod (22), a moving iron core (23), a coil (25), and an elastic component (26). The wire frame (21) includes a cavity component (211) and a first baffle (212) and a second baffle (213) disposed at both ends of the cavity component (211). A receiving space is formed in the cavity component (211). The first baffle (212) is fixed against the horizontal branch (113) of the U-shaped yoke (11). The second baffle (213) is fixedly engaged with the two longitudinal branches (11) of the U-shaped yoke (11). 1,112), such that the wire frame (21) is located on one side of the window, the stationary iron core (13) is placed on one side of the accommodating space, the coil (25) is wound around the outer wall of the cavity component (211), the push rod (22) passes through the stationary iron core (13) and is fixedly connected to the first end (231) of the moving iron core (23), the second end (232) of the moving iron core (23) passes through the yoke plate (12), the elastic component (26) is located between the second baffle (213) and the yoke plate (12), and is sleeved on the outer surface of the moving iron core (23); The circuit part (3) includes a PCB board (31), terminals (32) and a housing (33). The terminals (32) are located at the first end (311) of the PCB board (31). The terminals (32) are inserted into the first baffle (212) to achieve a fixed snap-fit ​​connection. The second end (312) of the PCB board (31) is snapped into the groove (214) of the second baffle (213). The housing (33) is snap-fitted to the U-shaped yoke (11). The PCB board (31) is electrically connected to the coil (25) through the terminal (32). When the coil (25) is energized, the moving iron core (23) is attracted and pulls the push rod (22) to move closer to the stationary iron core (13). When the coil (25) is de-energized, the moving iron core (23) is released and the push rod (22) is reset by the elastic component (26).

2. The electromagnetic cylinder according to claim 1, characterized in that: The magnetic core part (2) also includes a sleeve (24), which is riveted to the inner wall of the cavity component (211) to form the accommodating space.

3. The electromagnetic cylinder according to claim 1, characterized in that: The U-shaped yoke (11) has a bending notch (114) at the bend.

4. The electromagnetic cylinder according to claim 1, characterized in that: The yoke plate (12) has dovetail grooves (121) at both ends.

5. The electromagnetic cylinder according to claim 1, characterized in that: The wire frame (21) is equipped with a foolproof post (215).

6. An assembly fixture, suitable for assembling the electromagnetic cylinder according to any one of claims 1 to 5, characterized in that, include: A fixing block (45) is used to place the stationary iron core (13) and the U-shaped yoke (11); The stationary iron core punch (43) can expand the outer wall of the through hole in the stationary iron core (13) radially and then fasten it to the inner wall of the through hole of the horizontal branch of the U-shaped yoke (11) by applying pressure to the first end of the stationary iron core punch (43), thereby realizing the expansion and riveting connection.

7. The assembly fixture according to claim 6, characterized in that: The diameter of the stationary iron core punch (43) is 1-1.5 mm larger than the inner diameter of the stationary iron core (13), and the second end of the stationary iron core punch (43) has a chamfer of 45°.

8. An assembly fixture, suitable for assembling the electromagnetic cylinder of claim 2, characterized in that, include: The U-shaped base (41) is used to place the U-shaped yoke (11), the wire frame (21) and the sleeve (24). The U-shaped yoke (11) has been assembled with the stationary iron core (13). The sleeve punch (44) can expand the outer wall of the sleeve (24) radially and then fasten it to the inner wall of the cavity component (211) of the wire frame (21) by applying pressure to the first end of the sleeve punch (44), thereby realizing the expansion and riveting connection.

9. The assembly fixture according to claim 8, characterized in that: The diameter of the sleeve punch (44) is 1-1.5 mm larger than the inner diameter of the sleeve (24), and the second end of the sleeve punch (44) has a chamfer of 30°.

10. An assembly fixture, suitable for assembling the electromagnetic cylinders according to claims 1 to 9, characterized in that, include: U-shaped base (41) for placing the U-shaped yoke (11); The U-shaped yoke riveting cutter (42) has two blades at its second end. By applying pressure to the first end of the U-shaped yoke riveting cutter (42), two pieces of material can be cut out at the ends of the two longitudinal branches (111, 112) of the U-shaped yoke (11) and squeezed into the middle notch, thereby locking the extension of the yoke plate (12) located in the notch and realizing the riveting connection.

Images