Modularized magnetic attraction positioning jig

Abstract

The utility model discloses a modularized magnetic attraction positioning jig, which belongs to the technical field of surface mounting technology and comprises a connecting seat frame, a lifting driving mechanism, a stable lifting frame, a supporting rack, a plurality of pre-positioning magnet structures and a plurality of electromagnet units. The lifting driving mechanism is arranged in the connecting seat frame, the stable lifting frame is movably arranged on the connecting seat frame, and the lifting driving mechanism is in driving connection with the stable lifting frame; the supporting rack is arranged on the stable lifting rack, the plurality of pre-positioning magnet structures are uniformly distributed in the supporting rack, and the plurality of electromagnet units are uniformly distributed in the supporting rack. According to the modularized magnetic attraction positioning jig, the technical problem of how to improve the universal design of the positioning jig is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of surface mount technology, and in particular to a modular magnetic positioning fixture. Background Technology

[0002] SMT is an assembly technology that uses automated equipment to precisely mount micro-electronic components onto the surface of a PCB. It has now widely replaced the traditional through-hole mounting technology (THT). Its core is that it eliminates the need to drill holes in the PCB. Instead, it uses solder paste to fix the components on the surface and then completes the soldering of the electronic components through processes such as high-temperature reflow soldering.

[0003] SMT carriers, also known as SMT fixtures, are key auxiliary equipment in SMT production. They are mainly used to support, fix, position, and transport circuit boards, such as PCBs or FPCs, during the electronic manufacturing process, thereby ensuring the accuracy and efficiency of component placement, soldering, and other processes. Their design must meet requirements such as high temperature resistance, corrosion resistance, and high precision, and they are the key carriers connecting automated equipment and PCBs.

[0004] Based on this, Chinese patent document CN220476029U discloses an SMT tooling fixture, which includes: a base with multiple positioning posts on its upper surface; a carrier plate disposed above the base, with first positioning holes corresponding to the positioning posts; a first groove on the upper surface of the carrier plate, with multiple ventilation holes at the positions of the first groove, and multiple magnetic components on the carrier plate; and a pressure plate covering the carrier plate, with clearance holes for printed electronic components, and second positioning holes corresponding to the positioning posts, the second positioning holes being adapted to the positioning posts; the magnetic components are used to attract the pressure plate, so that the pressure plate and the carrier plate clamp the printed circuit board. By providing multiple ventilation holes on the carrier plate, heat dissipation of the printed circuit board is facilitated during the reflow oven process, preventing damage to the printed circuit board caused by local overheating, which helps to ensure product quality and improve product stability.

[0005] However, the SMT fixtures disclosed above still have technical problems that prevent their universal application. Specifically, in existing technologies, SMT fixtures mainly use precisely designed positioning pins, reference surfaces, and other structures to ensure the stable position of the PCB during printing, placement, and soldering processes, reducing placement errors caused by misalignment, such as the high precision requirement of ±0.01 mm. Therefore, SMT fixtures usually need to be designed differently depending on the PCB being mounted. Consequently, SMT manufacturers often use dozens or even hundreds of different specifications and models of SMT fixtures simultaneously. Furthermore, classifying and managing the large number of existing fixtures and applying them in a categorized manner is a challenging task. Utility Model Content

[0006] Therefore, it is necessary to provide a modular magnetic positioning fixture to address the technical issue of how to improve the universal design of positioning fixtures.

[0007] A modular magnetic positioning fixture includes: a connecting frame, a lifting drive mechanism, a stabilizing lifting frame, a support platform, a plurality of pre-positioning magnet structures, and a plurality of electromagnet units; the lifting drive mechanism is disposed in the connecting frame, the stabilizing lifting frame is movably disposed on the connecting frame, and the lifting drive mechanism is drivenly connected to the stabilizing lifting frame; the support platform is disposed on the stabilizing lifting frame, the plurality of pre-positioning magnet structures are evenly distributed in the support platform, and the plurality of electromagnet units are evenly distributed in the support platform.

[0008] Furthermore, the lifting drive mechanism includes a drive cylinder, a drive telescopic piston rod, and a connecting component.

[0009] Furthermore, the drive cylinder is connected to the connecting bracket, the drive cylinder is drivenly connected to the drive telescopic piston rod, and the connecting piece connects the drive telescopic piston rod and the stabilizing lifting frame respectively.

[0010] Furthermore, the stabilizing lifting frame has several guide sleeves, several guide rods, and a lifting platform.

[0011] Furthermore, several guide sleeves are evenly distributed on the connecting base, and each guide rod is movably sleeved in one of the guide sleeves.

[0012] Furthermore, each of the guide rods is connected to the lower part of the lifting platform, which is connected to the lower part of the support platform, and the connecting member is connected to one end of the drive telescopic piston rod and the lifting platform.

[0013] Furthermore, each of the prepositioning magnet structures is provided with a mounting collar and a ring magnet.

[0014] Furthermore, the mounting collar is disposed within the support frame, and the annular magnet is disposed within the mounting collar.

[0015] Furthermore, the support frame is provided with a plurality of positioning connecting rods; the plurality of positioning connecting rods are distributed and arranged on the support frame.

[0016] Furthermore, a magnetic connecting cover plate is provided on the support frame, and the magnetic connecting cover plate is movably arranged relative to the support frame. Each of the positioning connecting rods is respectively connected to the support frame and the magnetic connecting cover plate.

[0017] In summary, this utility model provides a modular magnetic positioning fixture comprising a connecting frame, a lifting drive mechanism, a stabilizing lifting frame, a support frame, several pre-positioning magnet structures, and several electromagnet units. The lifting drive mechanism is housed within the connecting frame, and the stabilizing lifting frame is movably mounted on the connecting frame, with the lifting drive mechanism and the stabilizing lifting frame being drivenly connected. The support frame is mounted on the stabilizing lifting frame, and the several pre-positioning magnet structures and the several electromagnet units are evenly distributed within the support frame. The pre-positioning magnet structures and electromagnet units provided by this utility model do not require matching and positioning through positioning pins or other structures. Therefore, it eliminates the need for pre-processing positioning holes or other structures on the workpiece, facilitating its versatility and allowing for simultaneous adaptation to various workpiece specifications. Thus, this utility model's modular magnetic positioning fixture solves the technical problem of improving the versatility design of positioning fixtures. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a modular magnetic positioning fixture according to the present invention;

[0019] Figure 2 This is an exploded view of the modular magnetic positioning fixture of this utility model from another direction. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Please refer to the following: Figures 1 to 2This utility model discloses a modular magnetic positioning fixture comprising: a connecting frame 1, a lifting drive mechanism 2, a stabilizing lifting frame 3, a support frame 4, a plurality of pre-positioning magnet structures 5, and a plurality of electromagnet units 6; the lifting drive mechanism 2 is disposed in the connecting frame 1, the stabilizing lifting frame 3 is movably disposed on the connecting frame 1, and the lifting drive mechanism 2 is drivenly connected to the stabilizing lifting frame 3; the support frame 4 is disposed on the stabilizing lifting frame 3, the plurality of pre-positioning magnet structures 5 are evenly distributed in the support frame 4, and the plurality of electromagnet units 6 are evenly distributed in the support frame 4.

[0027] Specifically, when the modular magnetic positioning fixture of this invention is in operation, the operator can place the workpiece to be loaded and positioned, such as a circuit board with a magnetic base or a clamping fixture with a magnetic base, on the support frame 4. The pre-positioning magnet structure 5 provided on the support frame 4 pre-positions the workpiece. Since the pre-positioning magnet structure 5 has a preset magnetic strength, the workpiece can be initially magnetically attracted to the support frame 4. After the operator adjusts the workpiece to the required position, each electromagnet unit 6 is energized and generates a strong magnetic field to firmly attract the workpiece to the support frame 4. At this time, it is difficult to move the workpiece manually, thus the workpiece can be magnetically fixed on the support frame 4. In addition, the connecting bracket 1 can be connected to external equipment, such as a conveyor belt for transporting fixtures or a mounting bracket for SMT equipment. Moreover, the lifting drive mechanism 2 can also drive the stable lifting frame 3, thereby raising or lowering the support frame 4 to raise or lower the magnetically attracted workpiece. The pre-positioning magnet structure 5 and the electromagnet unit 6 provided by this utility model do not require matching and positioning through structures such as positioning pins. Therefore, it eliminates the need for pre-processing of positioning holes and other structures on the workpiece, making it easily adaptable and suitable for various workpieces of different specifications. Thus, this modular magnetic positioning fixture solves the technical problem of how to improve the universal design of positioning fixtures.

[0028] Furthermore, the lifting drive mechanism 2 includes a drive cylinder 201, a drive telescopic piston rod 202, and a connecting member 203; the drive cylinder 201 is connected to the connecting base 1, the drive cylinder 201 is drivenly connected to the drive telescopic piston rod 202, and the connecting member 203 connects the drive telescopic piston rod 202 and the stable lifting frame 3 respectively.

[0029] Specifically, the drive cylinder 201 can drive the drive telescopic piston rod 202 to extend or shorten, and then the drive telescopic piston rod 202 drives the connecting member 203 to raise or lower the stabilizing lifting frame 2 and the support platform 4.

[0030] Furthermore, the stabilizing lifting frame 3 has a plurality of guide sleeves 301, a plurality of guide rods 302, and a lifting platform 303. The plurality of guide sleeves 301 are evenly distributed on the connecting seat 1. Each guide rod 302 is correspondingly movably sleeved in a guide sleeve 301. Each guide rod 302 is correspondingly connected to the lower part of the lifting platform 303. The lifting platform 303 is connected to the lower part of the support platform 4. The connecting member 203 is respectively connected to one end of the drive telescopic piston rod 202 and the lifting platform 303.

[0031] Furthermore, each of the prepositioning magnet structures 5 is provided with a mounting collar 501 and an annular magnet 502; the mounting collar 501 is disposed in the support frame 4, and the annular magnet 502 is disposed in the mounting collar 501.

[0032] Furthermore, in another embodiment, the support frame 4 is provided with a plurality of positioning connecting rods 401; the plurality of positioning connecting rods 401 are distributed and arranged on the support frame 4. In addition, a magnetic connecting cover plate 7 is provided on the support frame 4, the magnetic connecting cover plate 7 is movably disposed relative to the support frame 4, and each positioning connecting rod 401 connects the support frame 4 and the magnetic connecting cover plate 7 respectively. Specifically, in this embodiment, the magnetic connecting cover plate 7 can be made of magnetic materials such as iron. When some workpieces are placed on the support frame 4, the magnetic connecting cover plate can be placed on the workpieces, and the pre-positioning magnet structure 5 and the electromagnet unit 6 can clamp and position the workpieces, thereby improving the versatility of the magnetic positioning fixture.

[0033] In summary, this utility model provides a modular magnetic positioning fixture comprising a connecting frame 1, a lifting drive mechanism 2, a stabilizing lifting frame 3, a support frame 4, several pre-positioning magnet structures 5, and several electromagnet units 6. The lifting drive mechanism 2 is housed within the connecting frame 1, and the stabilizing lifting frame 3 is movably mounted on the connecting frame 1, with the lifting drive mechanism 2 and the stabilizing lifting frame 3 being drively connected. The support frame 4 is mounted on the stabilizing lifting frame 3, and several pre-positioning magnet structures 5 and several electromagnet units 6 are evenly distributed within the support frame 4. The pre-positioning magnet structures 5 and electromagnet units 6 provided by this utility model do not require matching and positioning through positioning pins or other structures. Therefore, it eliminates the need for pre-processing positioning holes or other structures on the workpiece, making it easily versatile and adaptable to various workpiece specifications. Thus, this utility model's modular magnetic positioning fixture solves the technical problem of how to improve the versatility of positioning fixture design.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A modular magnetic positioning fixture, characterized in that, It includes: a connecting frame (1), a lifting drive mechanism (2), a stabilizing lifting frame (3), a support frame (4), a plurality of pre-positioning magnet structures (5), and a plurality of electromagnet units (6); the lifting drive mechanism (2) is disposed in the connecting frame (1), the stabilizing lifting frame (3) is movably disposed on the connecting frame (1), and the lifting drive mechanism (2) is drivenly connected to the stabilizing lifting frame (3); the support frame (4) is disposed on the stabilizing lifting frame (3), the plurality of pre-positioning magnet structures (5) are evenly distributed in the support frame (4), and the plurality of electromagnet units (6) are evenly distributed in the support frame (4).

2. The modular magnetic positioning fixture according to claim 1, characterized in that: The lifting drive mechanism (2) has a drive cylinder (201), a drive telescopic piston rod (202), and a connecting member (203).

3. A modular magnetic positioning fixture according to claim 2, characterized in that: The drive cylinder (201) is connected to the connecting seat (1), the drive cylinder (201) is driven to connect with the drive telescopic piston rod (202), and the connecting piece (203) connects the drive telescopic piston rod (202) and the stabilizing lifting frame (3) respectively.

4. A modular magnetic positioning fixture according to claim 3, characterized in that: The stabilizing lifting frame (3) has several guide sleeves (301), several guide rods (302), and a lifting platform (303).

5. A modular magnetic positioning fixture according to claim 4, characterized in that: Several guide sleeves (301) are evenly distributed on the connecting frame (1), and each guide rod (302) is movably sleeved in one of the guide sleeves (301).

6. A modular magnetic positioning fixture according to claim 5, characterized in that: Each of the guide rods (302) is connected to the lifting platform (303) below it. The lifting platform (303) is connected to the support platform (4) below it. The connecting piece (203) is connected to one end of the drive telescopic piston rod (202) and the lifting platform (303).

7. A modular magnetic positioning fixture according to claim 6, characterized in that: Each of the prepositioning magnet structures (5) is provided with a mounting collar (501) and an annular magnet (502).

8. A modular magnetic positioning fixture according to claim 7, characterized in that: The mounting collar (501) is disposed in the support frame (4), and the annular magnet (502) is disposed in the mounting collar (501).

9. A modular magnetic positioning fixture according to claim 8, characterized in that: The support frame (4) is provided with a plurality of positioning connecting rods (401); the plurality of positioning connecting rods (401) are distributed and arranged on the support frame (4).

10. A modular magnetic positioning fixture according to claim 9, characterized in that: A magnetic connecting cover plate (7) is provided on the support frame (4). The magnetic connecting cover plate (7) is movably arranged relative to the support frame (4). Each positioning connecting rod (401) is connected to the support frame (4) and the magnetic connecting cover plate (7).

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