Positioning tool for circuit board drilling

Abstract

The utility model relates to the technical field of positioning tools, and discloses a circuit board drilling positioning tool which comprises a device table, a rack is arranged on the device table, a circuit board is placed on the device table when the circuit board drilling positioning tool is used, a threaded rod is rotated at the moment, one sliding strip slides in a transmission cavity through a thread screwing-in relation, and then the circuit board is drilled. At the moment, a transmission rack on one sliding strip can be matched with a transmission gear, then a transmission rack on the other sliding strip can horizontally slide, the purpose that the two sliding strips synchronously get close to each other is achieved, and when the sliding strips horizontally slide, sliding shafts connected to the sliding strips in a sliding mode can slide along guide sliding grooves; accordingly, the four L-shaped clamping blocks are synchronously gathered in the center direction and clamp the circuit board, the device table can clamp and fix the circuit boards of different sizes, and after fixing is completed, a drill bit can be driven by a hydraulic telescopic rod on the rack to vertically descend to conduct drilling work on the circuit board.

Description

Technical Field

[0001] This utility model relates to the field of positioning tooling technology, specifically a positioning tooling for drilling circuit boards. Background Technology

[0002] A circuit board, also known as a PCB, is one of the most important carriers of electronic components in the modern electronics industry. To facilitate installation, holes are usually drilled into the PCB; positioning fixtures must be made before drilling.

[0003] Chinese patent CN211806547U discloses a PCB circuit board drilling positioning fixture, including a positioning plate and a clamping plate, with the clamping plate covering the positioning plate. The positioning plate has a fixed support column and at least one movable support column connected to it. Two mutually perpendicular baffles are provided on the fixed support column. A lower guide sleeve is slidably connected to the positioning plate, and an upper guide sleeve is slidably connected to the clamping plate. The upper and lower guide sleeves can slide to be vertically opposite each other. This PCB circuit board drilling positioning fixture can reduce the micro-deformation of the PCB board during drilling, ensuring drilling accuracy.

[0004] While the micro-deformation of the circuit board during drilling can be reduced in the above cases, the positioning fixtures are not suitable for drilling circuit boards of different shapes due to the different PCB shapes. This requires redesigning the fixtures, which is time-consuming and labor-intensive. Summary of the Invention

[0005] Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a positioning fixture for drilling holes in circuit boards, thus solving the aforementioned technical problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for drilling circuit boards, comprising a device platform, a frame arranged on the device platform, a hydraulic telescopic rod mounted on the frame, a drill bit mounted on the actuating output end of the hydraulic telescopic rod, a transmission cavity formed on the device platform, a transmission gear rotatably mounted at the center of the transmission cavity, two sliding strips slidably mounted inside the transmission cavity, transmission racks protruding from the sliding strips and meshing with the transmission gears, a limiting groove formed at the top of the sliding strips, a sliding shaft slidably arranged within the limiting groove, an L-shaped clamping block connected to the top of the sliding shaft, four guide grooves communicating with the outside formed at the top of the transmission cavity, the ends of the four sliding shafts away from the limiting grooves respectively slidably arranged within the four guide grooves, four support columns provided at the bottom of the device platform, and a through hole formed at the center of the device platform.

[0008] Preferably, a threaded rod is rotatably mounted inside the transmission cavity, and one of the sliding bars is threadedly connected to the threaded rod.

[0009] Preferably, one end of the threaded rod extends through the transmission cavity to the outside, and a handwheel is connected to the end of the threaded rod extending to the outside.

[0010] Preferably, a support seat is arranged inside the transmission cavity, and the end of the threaded rod away from the handwheel is rotatably mounted in the support seat.

[0011] Preferably, the transmission cavity is provided with two guide rods, and the two sliding bars are slidably arranged on the two guide rods.

[0012] Preferably, the sliding bar has a notch, the size of which is adapted to the transmission rack.

[0013] Preferably, the sliding bar has a sliding hole with the same diameter as the guide rod.

[0014] Compared with the prior art, this utility model provides a positioning fixture for drilling holes in circuit boards, which has the following beneficial effects:

[0015] This invention utilizes a combination of threaded rods, sliding bars, sliding shafts, and L-shaped clamps to allow the circuit board to be placed on a platform during use. By rotating the threaded rod, one of the sliding bars slides within the transmission cavity through the threaded connection. This allows the transmission rack on the sliding bar to engage with the transmission gear, causing the transmission rack on the other sliding bar to slide horizontally and simultaneously approach each other. As the sliding bars slide horizontally, the sliding shaft connected to the sliding bar slides along the guide groove, causing the four L-shaped clamps to converge towards the center and clamp the circuit board. This allows the platform to clamp and fix circuit boards of different sizes. After fixing, the drill bit can be vertically lowered by the hydraulic telescopic rod on the frame to drill holes in the circuit board. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a top cross-sectional view of the transmission rack and transmission gear of this utility model.

[0018] Figure 3 This is a side sectional view of the sliding bar, transmission gear, and threaded rod of this utility model.

[0019] Figure 4 This is a cross-sectional structural diagram of the sliding bar, guide rod, and sliding shaft of this utility model.

[0020] The components include: 1. Device platform; 2. Support column; 3. Frame; 4. Hydraulic telescopic rod; 5. Drill bit; 6. L-shaped clamp; 7. Guide groove; 8. Handwheel; 9. Threaded rod; 10. Support base; 11. Transmission gear; 12. Transmission rack; 13. Sliding bar; 14. Sliding hole; 15. Notch; 16. Transmission cavity; 17. Guide rod; 18. Through hole; 19. Sliding shaft; 20. Limiting groove. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0022] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship 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 do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please see Figure 1-4A positioning fixture for drilling circuit boards includes a platform 1, a frame 3 on the platform 1, a hydraulic telescopic rod 4 on the frame 3, a drill bit 5 on the output end of the hydraulic telescopic rod 4, a transmission cavity 16 on the platform 1, a transmission gear 11 rotatably mounted at the center of the transmission cavity 16, two sliding strips 13 slidably mounted inside the transmission cavity 16, a transmission rack 12 protruding from the sliding strips 13 and meshing with the transmission gear 11, a limiting groove 20 on the top of the sliding strips 13, a sliding shaft 19 slidably arranged inside the limiting groove 20, an L-shaped clamp 6 connected to the top of the sliding shaft 19, four guide grooves 7 communicating with the outside on the top of the transmission cavity 16, one end of the four sliding shafts 19 away from the limiting groove 20 respectively slidably arranged in the four guide grooves 7, a threaded rod 9 rotatably mounted inside the transmission cavity 16, one of the sliding strips 13 being threadedly connected to the threaded rod 9, four support columns 2 at the bottom of the platform 1, and a through hole 18 at the center of the platform 1.

[0025] By employing the interplay of components such as the threaded rod 9, sliding bar 13, sliding shaft 19, and L-shaped clamping blocks 6, the circuit board can be placed on the device platform 1 during use. Rotating the threaded rod 9 causes one of the sliding bars 13 to slide within the transmission cavity 16 via the threaded screw thread. This allows the transmission rack 12 on the sliding bar 13 to engage with the transmission gear 11, causing the transmission rack 12 on the other sliding bar 13 to slide horizontally. This enables the two sliding bars 13 to move closer together synchronously. As the sliding bar 13 slides horizontally, the sliding shaft 19 connected to it slides along the guide groove 7, causing the four L-shaped clamping blocks 6 to converge synchronously towards the center and clamp the circuit board. This allows the device platform 1 to clamp and fix circuit boards of different sizes. After fixing, the drill bit 5 can be vertically lowered via the hydraulic telescopic rod 4 on the frame 3 to drill holes in the circuit board.

[0026] Specifically, in this embodiment, one end of the threaded rod 9 extends through the transmission cavity 16 to the outside, and the end of the threaded rod 9 extending to the outside is connected to a handwheel 8.

[0027] The handwheel 8 allows for easy rotation of the threaded rod 9. The handwheel 8 can be replaced with a motor to drive the threaded rod 9 as needed.

[0028] Specifically, in this embodiment, a support seat 10 is arranged inside the transmission cavity 16, and the end of the threaded rod 9 away from the handwheel 8 is rotatably installed in the support seat 10.

[0029] The support seat 10 can support one end of the threaded rod 9, thereby ensuring the stability of the threaded rod 9 during rotation.

[0030] Specifically, in this embodiment, two guide rods 17 are provided in the transmission cavity 16, and two sliding bars 13 are slidably arranged on the two guide rods 17. A sliding hole 14 is provided on the sliding bar 13, and the diameter of the sliding hole 14 is the same as the diameter of the guide rod 17.

[0031] By the cooperation of the sliding hole 14 and the guide rod 17, the sliding bar 13 can slide along the guide rod 17 through the sliding hole 14, thereby guiding the movement direction of the sliding bar 13.

[0032] Specifically, in this embodiment, the sliding bar 13 has a notch 15, the size of which is adapted to the transmission rack 12.

[0033] By providing the notch 15, when the two sliding bars 13 approach each other, the transmission rack 12 on the sliding bar 13 can pass through the notch 15 on the other sliding bar 13, thereby ensuring the range of movement of the two sliding bars 13.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning jig for drilling a circuit board, comprising a device table, characterized by: The device table is provided with a rack, a hydraulic telescopic rod is arranged on the rack, a drill bit is arranged on the action output end of the hydraulic telescopic rod, a transmission cavity is formed in the device table, a transmission gear is rotatably installed at the center position of the transmission cavity, two sliding strips are slidably installed in the transmission cavity, a transmission rack engaged with the transmission gear is protrudingly arranged on the sliding strip, a limiting sliding groove is formed in the top of the sliding strip, a sliding shaft is slidably arranged in the limiting sliding groove, an L-shaped clamping block is connected to the top of the sliding shaft, four guide sliding grooves communicating with the outside are formed in the top of the transmission cavity, the ends of the four sliding shafts away from the limiting sliding groove are respectively slidably arranged in the four guide sliding grooves, and four supporting columns are arranged at the bottom of the device table, and a through hole is formed at the center position of the device table.

2. The positioning jig for a circuit board according to claim 1, wherein: A threaded rod is rotatably installed in the transmission cavity, and one of the sliding strips is threadedly connected to the threaded rod.

3. The positioning tool for drilling a circuit board according to claim 2, wherein: One end of the threaded rod extends to the outside through the transmission cavity, and a hand wheel is connected to the end of the threaded rod extending to the outside.

4. The positioning tool for drilling a circuit board according to claim 1, wherein: A supporting seat is arranged in the transmission cavity, and one end of the threaded rod away from the hand wheel is rotatably installed in the supporting seat.

5. The positioning tool for drilling a circuit board according to claim 1, wherein: Two guide rods are arranged in the transmission cavity, and the two sliding strips are slidably arranged on the two guide rods.

6. The positioning tool for drilling a circuit board according to claim 1, wherein: A notch is formed in the sliding strip, and the size of the notch is matched with the transmission rack.

7. The positioning tool for drilling a circuit board according to claim 5, wherein: A sliding hole is formed in the sliding strip, and the diameter of the sliding hole is the same as the diameter of the guide rod.

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