A drilling depth limiting device

Abstract

This invention discloses a drilling depth limiting device, relating to the field of PCB drilling technology. It includes a base plate, with a fixed seat fixedly connected to the upper part of the base plate. A movable seat and a pressure spring are provided on the upper part of the fixed seat. A second mounting hole is provided at the bottom of the movable seat, and the upper part of the pressure spring is disposed inside the second mounting hole. Mounting brackets are fixedly connected to both sides of the movable seat, and rubber pads are fixedly connected to the bottom of each mounting bracket. Fixed rods are provided at the upper left and right ends of the fixed seat. This invention utilizes a mounting bracket slidably connected to the outside of the fixed rods, while the abutment seat forms a sliding fit with the sliding groove of the fixed seat through the movable rod and slider. This dual-guide structure significantly improves the stability of the movable seat, mounting brackets, and abutment seat during movement. A micro-cylinder drives the sliding sleeve to slide along the fixed rods, allowing precise control of the abutment seat's height. The contact between the rubber pads and the abutment seat achieves high-precision limiting of the drilling depth.

Description

Technical Field

[0001] This invention relates to the field of PCB drilling technology, and in particular to a drilling depth limiting device. Background Technology

[0002] As the core component of electronic devices, the drilling accuracy of PCBs directly affects the reliability of interlayer connections and the stability of equipment operation. With the miniaturization and high-density development of electronic devices, the number of holes on PCBs has surged and the hole diameters have become increasingly smaller. Hole depth accuracy directly determines the reliability of interlayer connections and the stability of signal transmission. To improve processing efficiency, the drilling depth is limited to increase the accuracy of drilling. Existing depth limiting technologies mostly adopt fixed blocks and cylinder direct drive architectures. Fixed blocks are locked in place by bolts, which can achieve basic limiting, but when facing the differentiated needs of PCBs of various specifications, frequent disassembly and replacement of blocks are required, and the time consumption for single specification switching is high, resulting in extremely low efficiency. The cylinder direct drive limiting structure relies only on cylinder rod guidance, which is prone to radial oscillation under drilling impact, leading to hole depth deviation. A drilling depth limiting device needs to be designed to solve the above-mentioned problems. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a drilling depth limiting device.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a drilling depth limiting device includes a base plate, a fixed seat fixedly connected to the upper part of the base plate, a movable seat provided on the upper part of the fixed seat, a first mounting hole provided in the middle of the fixed seat, a compression spring provided inside the first mounting hole, a second mounting hole provided at the bottom of the movable seat, the upper part of the compression spring being provided inside the second mounting hole, mounting brackets fixedly connected to the left and right sides of the movable seat, rubber pads fixedly connected to the bottom of each mounting bracket, a fixed rod provided at the upper left and right ends of the fixed seat, a sliding sleeve slidably connected to the outer side of each fixed rod, and an abutment seat fixedly provided on the inner side of each sliding sleeve.

[0005] Furthermore, the ends of the mounting brackets are all slidably connected to the outer side of the corresponding fixing rods.

[0006] Furthermore, miniature cylinders are fixedly connected to the upper left and right sides of the base plate, and mounting caps are fixedly connected to the telescopic ends of the miniature cylinders. A connecting rod is fixedly provided on the inner side of the mounting cap, and the inner end of the connecting rod is fixedly connected to the outer side of the corresponding sliding sleeve.

[0007] Furthermore, each of the abutment seats is fixedly provided with a movable rod at its bottom, and each movable rod is fixedly connected to a slider at its bottom end. Each of the fixed seats is provided with a sliding groove on its left and right sides, and the slider is slidably connected to the inner side of the corresponding sliding groove.

[0008] Furthermore, threaded seats are provided on the upper left and right sides of the fixing base, and threaded bolts are provided at the bottom of the fixing rod, with the threaded bolts respectively threadedly connected to the inner side of the corresponding threaded seats.

[0009] Furthermore, a connecting frame is fixedly provided on the upper part of the movable seat.

[0010] The beneficial effects of this invention are as follows: The mounting bracket is slidably connected to the outside of the fixed rod, while the abutment seat forms a sliding fit with the sliding groove of the fixed seat through the moving rod and slider. The dual guiding structure greatly improves the stability of the moving seat, mounting bracket and abutment seat during movement, effectively suppressing vibration and displacement, and providing a basic guarantee for drilling accuracy. The sliding sleeve is driven by a micro cylinder to slide along the fixed rod, which can precisely control the height position of the abutment seat. The abutment relationship between the rubber pad and the abutment seat realizes stepless adjustment and high-precision limit of drilling depth, adapting to the drilling needs of different workpieces and reducing manual adjustment errors. The downward pressure spring provides elastic buffer during the descent of the moving seat, slowing down the movement speed and avoiding rigid impact between the drill head and the workpiece and the base. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of a drilling depth limiting device.

[0012] Figure 2 This is a three-dimensional structural diagram of a fixing seat and a compression spring for a drilling depth limiting device.

[0013] Figure 3 This is a three-dimensional structural diagram of a drilling depth limiting device, including a movable base, mounting frame, and rubber pad.

[0014] Figure 4 This is a three-dimensional structural diagram of a drilling depth limiting device, comprising a sliding sleeve, abutment seat, a miniature cylinder, and a slider.

[0015] In the diagram: 1. Base plate; 2. Fixed seat; 3. First mounting hole; 4. Downward spring; 5. Moving seat; 6. Mounting bracket; 7. Rubber pad; 8. Fixed rod; 9. Sliding sleeve; 10. Abutment seat; 11. Miniature cylinder; 12. Connecting rod; 13. Mounting cap; 14. Connecting bracket; 15. Threaded seat; 16. Threaded bolt; 17. Second mounting hole; 18. Slide groove; 19. Moving rod; 20. Slider. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-4 The present invention provides a technical solution comprising: a base plate 1, a fixed seat 2 fixedly connected to the upper part of the base plate 1, a movable seat 5 provided on the upper part of the fixed seat 2, a first mounting hole 3 provided in the middle of the fixed seat 2, a downward pressure spring 4 provided inside the first mounting hole 3, a second mounting hole 17 provided at the bottom of the movable seat 5, the upper part of the downward pressure spring 4 provided inside the second mounting hole 17, mounting brackets 6 fixedly connected to the left and right sides of the movable seat 5, rubber pads 7 fixedly connected to the bottom of the mounting brackets 6, a fixed rod 8 provided at the upper left and right ends of the fixed seat 2, a sliding sleeve 9 slidably connected to the outer side of the fixed rod 8, and an abutment seat 10 fixedly provided on the inner side of the sliding sleeve 9.

[0018] The ends of the mounting bracket 6 are slidably connected to the outside of the corresponding fixing rod 8, which increases the stability and guidance of the mounting bracket 6 when it moves downward with the drill bit, and prevents vibration from causing displacement.

[0019] Miniature cylinders 11 are fixedly connected to the upper left and right sides of the base plate 1. Mounting caps 13 are fixedly connected to the telescopic ends of the miniature cylinders 11. Connecting rods 12 are fixedly installed on the inner side of the mounting caps 13. The inner end of the connecting rods 12 is fixedly connected to the outer side of the corresponding sliding sleeves 9. The sliding sleeves 9 are pushed to slide on the outer side of the fixed rods 8 by the miniature cylinders 11, which facilitates the control and adjustment of the lowering and contact position of the mounting bracket 6 and the rubber pad 7. While adjusting the drilling depth, the accuracy of adjustment and control is increased. The mounting caps 13 and connecting rods 12 facilitate connection, installation and disassembly.

[0020] Each abutment seat 10 has a fixed movable rod 19 at its bottom, and a slider 20 is fixedly connected to the bottom end of each movable rod 19. Each of the left and right sides of the fixed seat 2 has a sliding groove 18. The slider 20 is slidably connected to the inner side of the corresponding sliding groove 18. The sliding groove 18 and the slider 20 are connected by the movable rod 19. At the same time, when the slider 20 slides inside the sliding groove 18, it increases the stability and guidance of the movement of the abutment seat 10.

[0021] The upper left and right sides of the fixed base 2 are provided with threaded seats 15, and the bottom end of the fixed rod 8 is provided with threaded bolts 16. The threaded bolts 16 are threaded to the inner side of the corresponding threaded seats 15. Through the threaded seats 15 and threaded bolts 16, it is not only convenient to install and disassemble the fixed rod 8, but also convenient to disassemble and replace the upper structure.

[0022] A connecting frame 14 is fixedly installed on the upper part of the movable base 5 to facilitate the connection between the movable base 5 and the drill bit. When the drill bit moves downward, the movable base 5 moves downward accordingly.

[0023] Working principle: First, the movable seat 5 is connected to the drill bit via the upper connecting frame 14. As the drill bit descends, it drives the movable seat 5 and the mounting frame 6 to move downwards, and the end of the mounting frame 6 slides on the outside of the fixed rod 8. Then, the movable seat 5 compresses the lowering spring 4 downwards, so that the lowering spring 4 is compressed inside the first mounting hole 3 of the fixed seat 2, which reduces the downward movement rate of the movable seat 5 and the mounting frame 6. Finally, the micro cylinder 11 pushes the sliding sleeve 9 to slide on the outside of the fixed rod 8, so that the position of the abutment seat 10 is adjusted, and the abutment position of the rubber pad 7 and the abutment seat 10 is adjusted, which can limit the drilling depth of the drill bit. At the same time, the slider 20 slides on the inside of the slide groove 18.

[0024] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drilling depth limiter device comprising a base plate (1), characterized in that, A fixed base (2) is fixedly connected to the upper part of the base plate (1). A movable base (5) is provided on the upper part of the fixed base (2). A first mounting hole (3) is provided in the middle of the fixed base (2). A downward spring (4) is provided inside the first mounting hole (3). A second mounting hole (17) is provided at the bottom of the movable base (5). The upper part of the downward spring (4) is provided inside the second mounting hole (17). Mounting brackets (6) are fixedly connected to the left and right sides of the movable base (5). Rubber pads (7) are fixedly connected to the bottom of the mounting brackets (6). A fixed rod (8) is provided at the upper left and right ends of the fixed base (2). A sliding sleeve (9) is slidably connected to the outer side of the fixed rod (8). An abutment seat (10) is fixedly provided on the inner side of the sliding sleeve (9).

2. A depth limiting device according to claim 1, wherein: The ends of the mounting bracket (6) are all slidably connected to the outside of the corresponding fixing rod (8).

3. A depth limiting device according to claim 1, wherein: Miniature cylinders (11) are fixedly connected to the upper left and right sides of the base plate (1). The telescopic ends of the miniature cylinders (11) are fixedly connected to mounting caps (13). A connecting rod (12) is fixedly installed on the inner side of the mounting cap (13). The inner end of the connecting rod (12) is fixedly connected to the outer side of the corresponding sliding sleeve (9).

4. The depth limiting device of claim 1, wherein: Each of the abutment seats (10) has a fixed moving rod (19) at its bottom, and a slider (20) is fixedly connected to the bottom end of each moving rod (19). Each of the fixed seats (2) has a sliding groove (18) on its left and right sides, and the slider (20) is slidably connected to the inner side of the corresponding sliding groove (18).

5. The depth limiting device of claim 1, wherein: The upper left and right sides of the fixed base (2) are provided with threaded seats (15), and the bottom end of the fixed rod (8) is provided with threaded bolts (16). The threaded bolts (16) are respectively threaded to the inner side of the corresponding threaded seats (15).

6. A depth limiting device according to claim 1, wherein: A connecting frame (14) is fixedly installed on the upper part of the movable seat (5).

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