PCB spindle fixing device

Abstract

The application relates to the technical field of PCB drilling machines, and discloses a PCB spindle fixing device which comprises a motor sliding plate, a fixing frame is fixedly installed at the top of the motor sliding plate, a lower clamping sleeve is slidably connected to the top of the fixing frame, an upper clamping sleeve is fixedly installed at the top of the lower clamping sleeve through bolts, a spindle body is clamped between the lower clamping sleeve and the upper clamping sleeve, and fixing assemblies are arranged in the interiors of the left and right sides of the lower clamping sleeve; a position adjusting piece and a friction limiting piece are arranged between the fixing frame and the lower clamping sleeve, and a lubricating assembly is arranged in the interior of the lower clamping sleeve. A first knob is further screwed, gear one is driven to rotate, the mounting seat and the rack plate are driven to move back and forth relative to the fixing frame, and the position of the spindle body is adjusted; a second knob is further screwed, gear two is driven to rotate, the mounting seat and the rack plate are driven to slowly move, and the position of the spindle body is finely adjusted; thus, the position of the spindle body can be conveniently adjusted, and the drilling requirements of a multi-spindle drilling machine can be met.

Description

Technical Field

[0001] This invention relates to the field of PCB drilling machine technology, specifically to a PCB spindle fixing device. Background Technology

[0002] During PCB manufacturing, multiple holes need to be drilled on its surface. As the integration level of PCBs increases, the hole diameters become smaller and the number of holes increases, which places higher demands on the micro-hole processing capabilities of CNC drilling machines. Therefore, it is necessary to stabilize and accurately position the spindle of the PCB drilling machine to improve processing accuracy.

[0003] Chinese Patent CN217098083U, filed on April 18, 2022, discloses a fixing device for the Z-axis of a drilling machine. The device includes a sliding plate on which a Z-axis is mounted. The Z-axis is fixed to the sliding plate via a bushing assembly. The bushing assembly includes a first bushing mounted on the sliding plate and adapted to the Z-axis, and a second bushing detachably mounted on the first bushing and adapted to the Z-axis. A washer is also fitted onto the Z-axis and mounted on the bushing assembly. A pressure strip is also provided on the sliding plate at the top of the Z-axis. Thus, the rotating shaft assembly and the pressure strip effectively and accurately position the Z-axis, improving machining accuracy.

[0004] In this technical solution, the spindle is directly fixed and cannot be adjusted after installation. However, when drilling with a multi-axis drilling machine, two or more spindles are used on the same PCB at the same time. Due to the special working conditions, the two or more spindles need to be aligned in the same position. The existing spindle fixing method is difficult to meet the usage requirements of multi-axis drilling machines, so further improvements can be made. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a PCB spindle fixing device, which has the advantages of easy position adjustment after the spindle is fixed, and solves the problem of difficulty in adjustment when the spindle is directly fixed.

[0007] (II) Technical Solution

[0008] To facilitate position adjustment after the spindle is fixed, the present invention provides the following technical solution: a PCB spindle fixing device, including a motor slide plate, a fixing frame fixedly installed on the top of the motor slide plate, a lower clamping sleeve slidably connected to the top of the fixing frame, an upper clamping sleeve fixedly installed on the top of the lower clamping sleeve by bolts, a spindle body clamped between the lower and upper clamping sleeves, and fixing components provided inside the left and right sides of the lower clamping sleeve; a position adjusting component and a friction limiting component are provided between the fixing frame and the lower clamping sleeve, and a lubrication component is provided inside the lower clamping sleeve.

[0009] Preferably, the fixing frame includes a pad fixedly installed on the top of the motor slide plate, and two sets of limiting plates are fixedly installed on the top of the pad. Each of the two sets of limiting plates has a clamp welded to its top, and each clamp has a sliding hole through its front side at the top.

[0010] Preferably, the lower sleeve includes a mounting base, a lower support platform is fixedly mounted on the top of the front half of the mounting base, extension plates are fixedly mounted on the left and right sides of the front end of the lower support platform, a baffle is fixedly mounted on the top of the rear end of the mounting base, two rows of bolt holes are opened on the top of the lower support platform, and the number of bolt holes in each row is three; a slide is fixedly mounted on the bottom of the mounting base, the slide is slidably connected between two sets of limiting plates, and two mounting cavities are opened inside the lower support platform, with the bottom end of each row of bolt holes communicating with the mounting cavity.

[0011] Preferably, the upper sleeve includes an upper cover plate, which is attached to the top of the lower support platform. Both the upper cover plate and the lower support platform have arc-shaped surfaces on opposite sides. Rubber sheets are fixedly installed on opposite sides of both the upper cover plate and the lower support platform. The rubber sheets are attached to the circumferential surface of the spindle body, and the rear end of the spindle body is attached to a baffle plate. Two rows of countersunk holes are formed through the upper cover plate, and each countersunk hole corresponds to a bolt hole.

[0012] Preferably, each set of fixing components includes two fastening bolts, which are inserted into a row of countersunk holes at intervals and threaded into the bolt holes. A protruding post is fixedly installed at the bottom end of each fastening bolt. The bottom end of the protruding post is integrally formed with an extrusion cone. An annular groove is formed on the circumferential surface of the protruding post. A plug is slidably connected in the mounting cavity. The plug is perpendicular to the protruding post, and one end of the plug is inserted into the annular groove. An unlocking component is provided inside the mounting cavity, and the other end of the plug is fixedly installed on the unlocking component.

[0013] Preferably, the unlocking component includes an L-shaped plate slidably connected inside the mounting cavity, with a second spring fixedly installed between the bottom of the horizontal portion of the L-shaped plate and the inner wall of the mounting cavity; two sets of guide grooves are provided through the vertical portion of the L-shaped plate, the lower half of the guide grooves being vertical; the upper half of the two sets of guide grooves are inclined, and the distance between them gradually decreases from bottom to top; the unlocking component also includes two connecting plates, which are slidably connected inside the mounting cavity, and both connecting plates are attached to the vertical portion of the L-shaped plate; a sliding column is fixedly installed on the side of the connecting plate near the L-shaped plate, and the sliding column is slidably connected inside the guide groove; the opposite ends of the two connecting plates are respectively fixedly installed with two springs; the unlocking component also includes an unlocking bolt, which is threaded into a countersunk hole and located directly above the horizontal portion of the L-shaped plate.

[0014] Preferably, the position adjusting component includes a rack plate fixedly installed on the right side of the mounting base, a rotating shaft rotatably connected inside the clamping plate, a gear one fixedly installed at one end of the rotating shaft, a first knob fixedly installed at the other end of the rotating shaft, the gear one meshing with the rack plate; a disc-shaped seat fixedly installed in the middle of the rotating shaft, a ring gear fixedly installed on the right edge of the disc-shaped seat, a second knob rotatably connected to the outer side of the right half of the rotating shaft, a gear two fixedly installed on the left end of the second knob, a gear three meshing between the gear two and the ring gear; and a length scale is provided on the right side of the rack plate.

[0015] Preferably, the friction limiting component includes a friction tube fixedly installed on the rear side of the top of the extension plate. A U-shaped groove is formed through the circumference of the rear half of the friction tube. The friction tube forms two extrusion plates through the U-shaped groove. An inclined boss is fixedly installed on the inner side of the rear end of the extrusion plates. A straight groove is formed through the circumference of the friction tube, and the straight groove is located behind the U-shaped groove. A threaded rod is rotatably connected inside the friction tube. The threaded rod extends to the front side of the extension plate. A tapered tube is threadedly connected to the threaded rod. A second sliding column is fixedly installed at the rear end of the tapered tube. The second sliding column is slidably connected in the straight groove. The tapered tube fits against the inclined boss. A third knob is fixedly installed at the front end of the threaded rod.

[0016] Preferably, the lubrication assembly includes a turntable fixedly mounted on a threaded rod. An annular groove is provided on the front side of the turntable. A piston cylinder is fixedly mounted inside an extension plate. A sliding piston is slidably connected through the center of the top of the piston cylinder. A sliding column is fixedly mounted on the rear side of the top of the sliding piston, and the sliding column is slidably connected within the annular groove. An exhaust pipe is connected to the side of the top of the piston cylinder, extending to the outside of the extension plate. An inlet pipe and an outlet pipe are connected to the bottom of the piston cylinder. Both the inlet and outlet pipes are equipped with one-way valves. An oil storage chamber is provided within the mounting base and the lower support. The inlet pipe communicates with the oil storage chamber. Spray holes are provided through the left and right sidewalls of the mounting base at the rear end of the oil storage chamber. The end of the outlet pipe away from the piston cylinder communicates with the spray holes. Flow baffles are fixedly mounted on the left and right sides of the rear end of the mounting base, blocking the spray hole openings.

[0017] Preferably, the annular groove includes multiple arched grooves arranged in a circular array on the turntable, and the ends of two adjacent arched grooves are connected; each arched groove includes an arc groove, the center of the arc groove coincides with the axis of the turntable, one end of the arc groove is connected to a right inclined groove, and the other end of the arc groove is connected to a left inclined groove.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a PCB spindle fixing device, which has the following beneficial effects:

[0020] 1. This PCB spindle fixing device places the spindle body between the upper cover plate and the lower support plate, so that the end of the spindle body abuts against the baffle plate. Then, the fastening bolt is passed through the countersunk hole and screwed into the bolt hole. The compression cone presses against the insert. When the spring is compressed, when the insert is aligned with the annular groove, the spring elasticity causes the insert to insert into the annular groove. This prevents the fastening bolt from loosening due to vibration and keeps the spindle body stably fixed inside the lower and upper sleeves.

[0021] 2. This PCB spindle fixing device, when the third knob is turned, drives the threaded rod to rotate, thereby moving the tapered tube backward along the straight groove, separating the tapered tube from the inclined boss, allowing the friction tube to slide smoothly inside the sliding hole; then turning the first knob drives gear one to rotate, thereby moving the mounting base and rack plate back and forth relative to the fixing frame, adjusting the position of the spindle body; then turning the second knob drives gear two to rotate, which, in conjunction with the transmission action of gear three, drives the ring gear, disc seat, rotating shaft and gear one to rotate, driving the mounting base and rack plate to move slowly, fine-tuning the position of the spindle body; thus, it facilitates the adjustment of the spindle body position to meet the drilling needs of multi-axis drilling machines;

[0022] 3. After the spindle body is positioned, the third knob of the PCB spindle fixing device is turned to move the tapered tube forward along the straight groove. The tapered tube presses against the inclined boss, causing the pressing plate to bend outward. The pressing plate then presses against the inner wall of the sliding hole, inhibiting the lower sleeve from sliding relative to the fixing frame and limiting the position of the spindle body. This achieves the purpose of conveniently limiting the position after the spindle body is positioned.

[0023] 4. In this PCB spindle fixing device, the turntable rotates synchronously during the rotation of the threaded rod, and the sliding column three slides along the annular groove. When the sliding column three passes through an arched groove, the sliding piston makes a reciprocating up-and-down motion inside the piston cylinder. Through the one-way valves inside the inlet and outlet pipes, the lubricating oil in the oil storage chamber enters the piston cylinder through the inlet pipe. Then, the lubricating oil is sprayed onto the surface of the baffle plate through the outlet pipe and the spray hole. Under the action of gravity, the lubricating oil flows down along the slide block. Then, the lower jacket slides relative to the fixed frame through the position adjustment component, so that the limiting plate rubs on the slide block, and the lubricating oil is evenly coated on the slide block, ensuring that the lower jacket slides relatively smoothly relative to the fixed frame, thereby achieving the purpose of automatic lubrication and preventing jamming when adjusting the position of the spindle body. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a PCB spindle fixing device proposed in this invention;

[0025] Figure 2 This is a three-dimensional exploded view of a PCB spindle fixing device proposed in this invention;

[0026] Figure 3 This is a three-dimensional cross-sectional view of the fixing component of a PCB spindle fixing device proposed in this invention;

[0027] Figure 4 This is a three-dimensional structural diagram of the fixing component of a PCB spindle fixing device proposed in this invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the PCB spindle fixing device proposed in this invention, showing the lower clamp and fixing frame separated.

[0029] Figure 6 This is a three-dimensional structural diagram of a position adjustment component for a PCB spindle fixing device proposed in this invention;

[0030] Figure 7 This is a three-dimensional structural diagram of a friction limiting component for a PCB spindle fixing device proposed in this invention;

[0031] Figure 8This is a three-dimensional structural diagram of the lubrication assembly of a PCB spindle fixing device proposed in this invention;

[0032] Figure 9 This is a three-dimensional cross-sectional view of the piston cylinder of a PCB spindle fixing device proposed in this invention;

[0033] Figure 10 This is a schematic diagram of the annular slide groove structure of a PCB spindle fixing device proposed in this invention;

[0034] Figure 11 This is a bottom-view cross-sectional view of the slide of a PCB spindle fixing device proposed in this invention;

[0035] Figure 12 This is a three-dimensional structural diagram of a one-way valve for a PCB spindle fixing device proposed in this invention.

[0036] In the diagram: 100, motor slide plate; 200, fixing frame; 300, lower clamp; 400, upper clamp; 500, spindle body; 600, fixing assembly; 700, position adjusting component; 800, friction limiting component; 900, lubrication assembly;

[0037] 101. Slider; 102. Cylinder seat; 201. Pad; 202. Limiting plate; 203. Clamping plate; 204. Sliding hole;

[0038] 301. Mounting base; 302. Lower support platform; 303. Extension plate; 304. Baffle; 305. Slide; 306. Bolt hole; 307. Mounting cavity;

[0039] 401. Top cover plate; 402. Rubber sheet; 403. Countersunk hole;

[0040] 601. Fastening bolt; 602. Protruding post; 603. Extrusion cone; 604. Annular groove; 605. Insert post; 606. Spring 1; 607. L-shaped plate; 608. Spring 2; 609. Guide groove; 610. Connecting plate; 611. Sliding post 1; 612. Unlocking bolt;

[0041] 701. Rack plate; 702. Shaft; 703. Gear 1; 704. First knob; 705. Disc base; 706. Ring gear; 707. Second knob; 708. Gear 2; 709. Gear 3; 710. Length scale;

[0042] 801. Friction tube; 802. U-shaped groove; 803. Extrusion plate; 804. Inclined boss; 805. Straight groove; 806. Threaded rod; 807. Tapered tube; 808. Sliding column two; 809. Third knob;

[0043] 901. Turntable; 902. Annular groove; 903. Piston cylinder; 904. Sliding piston; 905. Sliding column three; 906. Exhaust pipe; 907. Inlet pipe; 908. Drain pipe; 909. Oil storage chamber; 910. Spray hole; 911. Baffle plate; 912. Embedded ring; 913. Hollowed-out plate; 914. Valve stem; 915. Sealing plug; 916. Spring three; 9021. Arc groove; 9022. Right-inclined groove; 9023. Left-inclined groove. Detailed Implementation

[0044] 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.

[0045] Please see Figures 1-3 A PCB spindle fixing device includes a motor slide plate 100, a fixing frame 200 fixedly mounted on the top of the motor slide plate 100, a lower clamping sleeve 300 slidably connected to the top of the fixing frame 200, an upper clamping sleeve 400 fixedly mounted on the top of the lower clamping sleeve 300 by bolts, a spindle body 500 clamped between the lower clamping sleeve 300 and the upper clamping sleeve 400, fixing components 600 are provided inside the left and right sides of the lower clamping sleeve 300; a position adjusting component 700 and a friction limiting component 800 are provided between the fixing frame 200 and the lower clamping sleeve 300, and a lubrication component 900 is provided inside the lower clamping sleeve 300.

[0046] Please see Figure 2 The motor slide plate 100 has four sliders 101 arranged in a rectangular array at its bottom. Two cylinder seats 102 are fixedly mounted on the top of the motor slide plate 100 for connection to cylinders. The mounting bracket 200 includes a pad 201 fixedly mounted on the top of the motor slide plate 100. Two sets of limiting plates 202 are fixedly mounted on the top of the pad 201. Each limiting plate 202 has a protruding strip at one opposite end, with the cross-section of the protruding strip being an isosceles trapezoid. Clamping plates 203 are welded to the top of each set of limiting plates 202, perpendicular to the limiting plates 202. Each clamping plate 203 has a through-hole 204 on its front top.

[0047] Please see Figures 2-3The lower sleeve 300 includes a mounting base 301. A lower support platform 302 is fixedly mounted on the top of the front half of the mounting base 301. Extension plates 303 are fixedly mounted on both the left and right sides of the front end of the lower support platform 302. A baffle 304 is fixedly mounted on the top of the rear end of the mounting base 301. Two rows of bolt holes 306 are provided on the top of the lower support platform 302, arranged left and right, with three bolt holes in each row. A slide block 305 is fixedly mounted on the bottom of the mounting base 301, and the slide block 305 is slidably connected between two sets of limiting plates 202. Two mounting cavities 307 are provided inside the lower support platform 302, and the bottom end of each row of bolt holes 306 communicates with the mounting cavity 307. The mounting cavity 307 is used to accommodate the fixing component 600.

[0048] Please see Figures 2-3 The upper clamping sleeve 400 includes an upper cover plate 401, which is attached to the top of the lower support platform 302. Both the upper cover plate 401 and the lower support platform 302 have curved surfaces on opposite sides. Rubber sheets 402 are fixedly installed on opposite sides of both the upper cover plate 401 and the lower support platform 302, and these rubber sheets 402 are attached to the circumferential surface of the spindle body 500. This clamping action of the upper cover plate 401 and the lower support platform 302 limits the spindle body 500 and enhances its fixation. The rear end of the spindle body 500 is attached to a baffle plate 304. Two rows of countersunk holes 403 are formed through the upper cover plate 401, each corresponding to a bolt hole 306.

[0049] Please see Figures 3-4 Each set of fixing components 600 includes two fastening bolts 601. The two fastening bolts 601 are inserted into a row of countersunk holes 403 at intervals and threaded into bolt holes 306, thereby connecting the upper cover plate 401 and the lower support platform 302 together through the fastening bolts 601.

[0050] A protruding post 602 is fixedly installed at the bottom end of the fastening bolt 601. The diameter of the protruding post 602 is smaller than the diameter of the fastening bolt 601. An extrusion cone 603 is integrally formed at the bottom end of the protruding post 602. An annular groove 604 is opened on the circumferential surface of the protruding post 602. An insert post 605 is slidably connected in the mounting cavity 307. The insert post 605 is perpendicular to the protruding post 602, and one end of the insert post 605 is inserted into the annular groove 604. An unlocking component is provided inside the mounting cavity 307, and the other end of the insert post 605 is fixedly installed on the unlocking component. The end of the insert 605 near the protrusion 602 is hemispherical. When the fastening bolt 601 is tightened to connect the upper cover plate 401 and the lower support 302, the protrusion 602 continuously penetrates into the bolt hole 306, and the extrusion cone 603 extrudes the insert 605, causing the insert 605 to slide in the mounting cavity 307, and the spring 606 is compressed. When the annular groove 604 is aligned with the insert 605, under the elastic action of the spring 606, the insert 605 is inserted into the annular groove 604.

[0051] When the fastening bolt 601 rotates, it will move upward or downward relative to the lower support 302. The insertion of the insert 605 into the annular groove 604 suppresses the upward or downward movement of the fastening bolt 601 relative to the insert 605, preventing the lower sleeve 300 and upper sleeve 400 from vibrating during the rotation of the spindle body 500, and preventing the fastening bolt 601 from rotating relative to the lower support 302 and upper cover plate 401 and becoming loose.

[0052] Please see Figures 3-4 The unlocking component includes an L-shaped plate 607 that is slidably connected inside the mounting cavity 307. A spring 608 is fixedly installed between the bottom of the horizontal part of the L-shaped plate 607 and the inner wall of the mounting cavity 307. Two sets of guide grooves 609 are provided through the vertical part of the L-shaped plate 607. The lower half of the guide grooves 609 is vertical. The upper half of the two sets of guide grooves 609 is inclined, and the distance between them gradually decreases from bottom to top.

[0053] The unlocking mechanism also includes two connecting plates 610, which are slidably connected within the mounting cavity 307. Both connecting plates 610 are attached to the vertical portion of the L-shaped plate 607. A sliding post 611 is fixedly installed on the side of the connecting plate 610 closest to the L-shaped plate 607. The sliding post 611 is slidably connected within the guide groove 609. The opposite ends of the two connecting plates 610 are respectively fixedly installed with two springs 606. The elasticity of the springs 608 causes the L-shaped plate 607 to tend to move upwards. Initially, the sliding post 611 is slidably connected within the lower half of the guide groove 609. Even if the L-shaped plate 607 moves slightly under vibration, the sliding post 611 remains within the lower half of the guide groove 609, thus keeping the insert 605 inserted into the annular slot 604.

[0054] The unlocking mechanism also includes an unlocking bolt 612, which is threaded into the countersunk hole 403 and positioned directly above the horizontal portion of the L-shaped plate 607. When disassembling the spindle body 500, the fastening bolt 601 must first be removed. By unscrewing the unlocking bolt 612, it presses downwards against the L-shaped plate 607, causing the sliding column 611 to slide into the upper part of the guide groove 609. This pulls the two connecting plates 610 closer together, and with the connecting action of the spring 606, the insert 605 is pulled out of the annular groove 604, releasing the limiting effect on the fastening bolt 601. Then, by unscrewing the fastening bolt 601, the spindle can be disassembled.

[0055] Please see Figures 5-6The position adjustment component 700 includes a rack plate 701 fixedly installed on the right side of the mounting base 301. A rotating shaft 702 is rotatably connected inside the clamping plate 203. A gear 703 is fixedly installed at one end of the rotating shaft 702, and a first knob 704 is fixedly installed at the other end of the rotating shaft 702. The gear 703 meshes with the rack plate 701. By turning the first knob 704, the gear 703 can be rotated, causing the lower clamping sleeve 300 to slide relative to the fixed frame 200, thereby adjusting the position of the spindle body 500.

[0056] A disc-shaped seat 705 is fixedly mounted in the middle of the rotating shaft 702. A ring gear 706 is fixedly mounted on the right edge of the disc-shaped seat 705. A second knob 707 is rotatably connected to the outer side of the right half of the rotating shaft 702. A second gear 708 is fixedly mounted on the left end of the second knob 707. A third gear 709 meshes between the second gear 708 and the ring gear 706. A length scale 710 is provided on the right side of the rack plate 701. By turning the first knob 704, the second gear 708 is driven to rotate. With the transmission action of the third gear 709 and the ring gear 706, the disc-shaped seat 705, the rotating shaft 702, and the first gear 703 are driven to rotate, causing the lower clamping sleeve 300 to move relative to the fixed frame 200. By turning the first knob 704, the lower clamping sleeve 300 can be quickly driven to move, thereby quickly adjusting the position of the spindle body 500. When the second knob 707 is turned, the lower clamping sleeve 300 moves more slowly, which is convenient for fine-tuning the position of the spindle body 500.

[0057] Please see Figure 5 and Figure 7 The friction limiting component 800 includes a friction tube 801 fixedly installed on the rear side of the top end of the extension plate 303. The friction tube 801 is inserted into the sliding hole 204, and the outer diameter of the friction tube 801 is equal to the inner diameter of the sliding hole 204. A U-shaped groove 802 is formed through the rear half of the circumferential surface of the friction tube 801. The friction tube 801 forms two extrusion plates 803 through the U-shaped groove 802. An inclined boss 804 is fixedly installed on the inner side of the rear end of the extrusion plate 803. A straight groove 805 is formed through the circumferential surface of the friction tube 801 and is located behind the U-shaped groove 802.

[0058] A threaded rod 806 is rotatably connected inside the friction tube 801, extending to the front of the extension plate 303. A tapered tube 807 is threaded onto the threaded rod 806, and a threaded groove is formed on the inner wall of the tapered tube 807. A sliding column 808 is fixedly installed at the rear end of the tapered tube 807, and the sliding column 808 is slidably connected in the straight groove 805. The tapered tube 807 is fitted against the inclined boss 804. A third knob 809 is fixedly installed at the front end of the threaded rod 806. By turning the third knob 809, the threaded rod 806 is rotated, thereby causing the tapered tube 807 to move forward along the straight groove 805. The tapered tube 807 compresses the inclined boss 804, causing the compression plate 803 to bend outward. Thus, the compression plate 803 is tightly attached to the inner wall of the sliding hole 204, inhibiting the friction tube 801 from sliding within the sliding hole 204. Therefore, after adjusting the position of the spindle body 500, the position of the lower sleeve 300 can be limited by the friction limiting component 800, thereby limiting the position of the spindle body 500. Similarly, before adjusting the position of the spindle body 500, the third knob 809 can be turned in the opposite direction to move the tapered tube 807 backward, preventing the tapered tube 807 from squeezing the inclined boss 804 and causing the extrusion plate 803 to bend outward.

[0059] Please see Figures 7-10 The lubrication assembly 900 includes a turntable 901 fixedly mounted on a threaded rod 806. An annular groove 902 is formed on the front side of the turntable 901. A piston cylinder 903 is fixedly mounted inside an extension plate 303. A sliding piston 904 is slidably connected through the center of the top of the piston cylinder 903. A sliding column 905 is fixedly mounted on the rear side of the top of the sliding piston 904. The sliding column 905 is slidably connected within the annular groove 902. The annular groove 902 includes multiple arched grooves arranged in a circumferential array on the turntable 901, with the ends of adjacent arched grooves connected. During the turning of the third knob 809, the threaded rod 806 drives the turntable 901 to rotate, causing the sliding column 905 to slide along the annular groove 902. When the sliding column 905 passes through an arched groove, the sliding piston 904 performs one up-and-down reciprocating motion within the piston cylinder 903.

[0060] Each arched groove includes an arc groove 9021, the center of which coincides with the axis of the turntable 901. One end of the arc groove 9021 is connected to a right-inclined groove 9022, and the other end is connected to a left-inclined groove 9023. The right-inclined groove 9022 and the left-inclined groove 9023 are symmetrical about the line connecting the center of the arc groove 9021 and the center of the turntable 901. In reality, the connection between each pair of arc grooves 9021, right-inclined groove 9022, and left-inclined groove 9023 is an arc transition.

[0061] Please see Figures 8-10The piston cylinder 903 has an exhaust pipe 906 connected to the top side. The exhaust pipe 906 extends to the outside of the extension plate 303. During the reciprocating motion of the sliding piston 904, the air inside the upper part of the piston cylinder 903 can be discharged through the exhaust pipe 906.

[0062] Please see Figures 8-12 The piston cylinder 903 has an inlet pipe 907 and an outlet pipe 908 connected to its bottom. Both the inlet pipe 907 and the outlet pipe 908 are equipped with one-way valves. An oil storage chamber 909 is provided in the mounting base 301 and the lower support 302. The opening of the oil storage chamber 909 is located at the rear end of the mounting base 301, and a removable sealing cap is provided at the opening. The oil storage chamber 909 contains lubricating oil. The inlet pipe 907 communicates with the oil storage chamber 909. The left and right side walls of the mounting base 301 at the rear end of the oil storage chamber 909 are provided with spray holes 910. The end of the outlet pipe 908 away from the piston cylinder 903 communicates with the spray holes 910. Baffle plates 911 are fixedly installed on the left and right sides of the rear end of the mounting base 301, and the baffle plates 911 block the opening of the spray holes 910.

[0063] In practice, when drilling holes in a PCB board, the spindle body 500 is in a vertical position, and the lubricating oil inside the oil reservoir 909 is collected inside the front end of the lower support 302. During the reciprocating motion of the sliding piston 904, the lubricating oil inside the oil reservoir 909 is allowed to pass through the inlet pipe 907 into the piston cylinder 903 through the check valve, and then sprayed onto the surface of the baffle plate 911 through the drain pipe 908 and the spray hole 910. Under the action of gravity, the lubricating oil flows downward along the slide block 305, and then the lower jacket 300 is driven to slide relative to the fixed frame 200 by the position adjustment component 700, so that the limiting plate 202 rubs on the slide block 305, and the lubricating oil is evenly coated on the slide block 305.

[0064] Specifically, the one-way valves inside the inlet pipe 907 and the outlet pipe 908 are set in opposite directions. The following description uses the one-way valve inside the inlet pipe 907 as an example to illustrate its components. The one-way valve includes an insert ring 912 and a perforated plate 913 fixedly installed on the inner wall of the inlet pipe 907 or the outlet pipe 908. The perforated plate 913 is located above the insert ring 912, and a valve stem 914 is slidably connected through the center of the perforated plate 913. A sealing plug 915 is fixedly installed at the bottom end of the valve stem 914. The sealing plug 915 is frustum-shaped, and the inner wall of the insert ring 912 is adapted to the circumferential surface of the sealing plug 915. A spring 916 is fixedly installed between the sealing plug 915 and the perforated plate 913. Under the elastic action of the spring 916, the sealing plug 915 tends to insert into the insert ring 912, and the sealing plug 915 and the insert ring 912 cooperate to seal the inlet pipe 907. When the piston cylinder 903 is under negative pressure, the sealing plug 915 moves upward under pressure, the spring 916 is compressed, and the lubricating oil inside the oil reservoir 909 can pass through the inlet pipe 907 into the piston cylinder 903. When the piston cylinder 903 is under positive pressure, the sealing plug 915 tends to be inserted into the insert ring 912, keeping the inlet pipe 907 sealed.

[0065] In use, the spindle body 500 is placed between the upper cover plate 401 and the lower support plate 302, so that the end of the spindle body 500 abuts against the baffle 304. Then, the fastening bolt 601 is passed through the countersunk hole 403 and screwed into the bolt hole 306. The pressing cone 603 presses the insert 605, and the spring 606 is compressed. When the insert 605 is aligned with the annular groove 604, the insert 605 is inserted into the annular groove 604 under the elastic action of the spring 606.

[0066] Turning the third knob 809 rotates the threaded rod 806, which in turn moves the tapered tube 807 backward along the straight groove 805, separating the tapered tube 807 from the inclined boss 804, allowing the friction tube 801 to slide smoothly inside the sliding hole 204; then turning the first knob 704 rotates the gear 703, which in turn moves the mounting base 301 and the rack plate 701 back and forth relative to the fixed frame 200, adjusting the position of the spindle body 500;

[0067] Turn the second knob 707 to drive the second gear 708 to rotate. With the transmission action of the third gear 709, the ring gear 706, the disc seat 705, the rotating shaft 702 and the first gear 703 will rotate, driving the mounting base 301 and the rack plate 701 to move slowly and make fine adjustments to the position of the main shaft body 500.

[0068] After the position of the spindle body 500 is adjusted, turn the third knob 809 to move the tapered tube 807 forward along the straight groove 805. The tapered tube 807 squeezes the inclined boss 804, causing the extrusion plate 803 to bend outward. Thus, the extrusion plate 803 squeezes the inner wall of the sliding hole 204, inhibiting the lower jacket 300 from sliding relative to the fixed frame 200, and limiting the position of the spindle body 500.

[0069] During the rotation of the threaded rod 806, the turntable 901 rotates synchronously, and the sliding column 905 slides along the annular groove 902. Specifically, when the sliding column 905 passes through an arched groove, the sliding piston 904 makes a reciprocating up-and-down motion inside the piston cylinder 903. Through the one-way valves inside the inlet pipe 907 and the outlet pipe 908, the lubricating oil inside the oil storage chamber 909 passes through the inlet pipe 907 and enters the piston cylinder 903. Then, the lubricating oil is sprayed onto the surface of the baffle plate 911 through the outlet pipe 908 and the spray hole 910. Under the action of gravity, the lubricating oil flows downward along the slide block 305. Then, the lower jacket 300 is driven to slide relative to the fixed frame 200 by the position adjustment component 700, so that the limiting plate 202 rubs on the slide block 305, and the lubricating oil is evenly coated on the slide block 305, ensuring that the lower jacket 300 slides relatively smoothly relative to the fixed frame 200.

[0070] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PCB spindle fixing device, comprising a motor slide plate (100), characterized in that: A fixing frame (200) is fixedly installed on the top of the motor slide plate (100). A lower clamping sleeve (300) is slidably connected to the top of the fixing frame (200). An upper clamping sleeve (400) is fixedly installed on the top of the lower clamping sleeve (300) by bolts. The main shaft body (500) is clamped between the lower clamping sleeve (300) and the upper clamping sleeve (400). Fixing components (600) are provided inside the left and right sides of the lower clamping sleeve (300). A position adjustment component (700) and a friction limiting component (800) are provided between the fixed frame (200) and the lower clamp (300), and a lubrication assembly (900) is provided inside the lower clamp (300). The lower sleeve (300) includes a mounting base (301), a lower support platform (302) is fixedly installed on the top of the front half of the mounting base (301), extension plates (303) are fixedly installed on the left and right sides of the front end of the lower support platform (302), a baffle (304) is fixedly installed on the top of the rear end of the mounting base (301), and two rows of bolt holes (306) are opened on the top of the lower support platform (302), with three bolt holes (306) in each row; The upper sleeve (400) includes an upper cover plate (401), which is attached to the top of the lower support platform (302). Two rows of countersunk holes (403) are provided through the upper cover plate (401), and the countersunk holes (403) correspond one-to-one with the bolt holes (306). The mounting base (301) has a slide (305) fixedly installed at the bottom. The slide (305) is slidably connected between two sets of limiting plates (202). The lower support (302) has two mounting cavities (307) inside. The bottom end of each row of bolt holes (306) is connected to the mounting cavity (307). Each set of fixing components (600) includes two fastening bolts (601). The two fastening bolts (601) are inserted into a row of countersunk holes (403) at intervals and threaded into bolt holes (306). A protruding post (602) is fixedly installed at the bottom end of the fastening bolt (601). A pressing cone (603) is integrally formed at the bottom end of the protruding post (602). An annular groove (604) is opened on the circumferential surface of the protruding post (602). A plug (605) is slidably connected in the mounting cavity (307). The plug (605) is perpendicular to the protruding post (602), and one end of the plug (605) is inserted into the annular groove (604). An unlocking component is provided inside the mounting cavity (307). The other end of the plug (605) is fixedly installed on the unlocking component.

2. The PCB spindle fixing device according to claim 1, characterized in that: The fixing frame (200) includes a pad (201) fixedly installed on the top of the motor slide plate (100). Two sets of limiting plates (202) are fixedly installed on the top of the pad (201). Each of the two sets of limiting plates (202) has a clamp (203) welded to its top. Each clamp (203) has a sliding hole (204) through it on the front side of its top end.

3. The PCB spindle fixing device according to claim 1, characterized in that: The upper cover plate (401) and the lower support plate (302) are both arc-shaped on opposite sides. Rubber sheets (402) are fixedly installed on opposite sides of the upper cover plate (401) and the lower support plate (302). The rubber sheets (402) are attached to the circumferential surface of the spindle body (500). The rear end of the spindle body (500) is attached to the baffle (304).

4. The PCB spindle fixing device according to claim 1, characterized in that: The unlocking component includes an L-shaped plate (607) that is slidably connected inside the mounting cavity (307), and a spring (608) is fixedly installed between the bottom of the horizontal portion of the L-shaped plate (607) and the inner wall of the mounting cavity (307). The vertical portion of the L-shaped plate (607) is provided with two sets of guide grooves (609), the lower half of which is vertical; The upper half of the two sets of guide grooves (609) is inclined, and the distance between them gradually decreases from bottom to top; The unlocking component also includes two connecting plates (610), which are slidably connected in the mounting cavity (307). Both connecting plates (610) are attached to the vertical part of the L-shaped plate (607). A sliding column (611) is fixedly installed on the side of the connecting plate (610) near the L-shaped plate (607). The sliding column (611) is slidably connected in the guide groove (609). The opposite ends of the two connecting plates (610) are respectively fixedly installed with two springs (606). The unlocking component also includes an unlocking bolt (612), which is threaded into the countersunk hole (403) and is located directly above the horizontal portion of the L-shaped plate (607).

5. The PCB spindle fixing device according to claim 2, characterized in that: The position adjustment component (700) includes a rack plate (701) fixedly installed on the right side of the mounting base (301), a rotating shaft (702) rotatably connected inside the clamping plate (203), a gear (703) fixedly installed on one end of the rotating shaft (702), and a first knob (704) fixedly installed on the other end of the rotating shaft (702), and the gear (703) meshing with the rack plate (701); A disc-shaped seat (705) is fixedly installed in the middle of the rotating shaft (702). A ring gear (706) is fixedly installed on the right edge of the disc-shaped seat (705). A second knob (707) is rotatably connected to the outer side of the right half of the rotating shaft (702). A second gear (708) is fixedly installed on the left end of the second knob (707). A third gear (709) meshes between the second gear (708) and the ring gear (706). The rack plate (701) has a length scale (710) on its right side.

6. The PCB spindle fixing device according to claim 5, characterized in that: The friction limiting component (800) includes a friction tube (801) fixedly installed on the rear side of the top end of the extension plate (303). A U-shaped groove (802) is opened through the rear half of the circumferential surface of the friction tube (801). The friction tube (801) forms two extrusion plates (803) through the U-shaped groove (802). An inclined boss (804) is fixedly installed on the inner side of the rear end of the extrusion plate (803). A straight groove (805) is opened through the circumferential surface of the friction tube (801). The straight groove (805) is located behind the U-shaped groove (802). The friction tube (801) is rotatably connected to a threaded rod (806), which extends to the front side of the extension plate (303). A tapered tube (807) is threaded onto the threaded rod (806). A sliding column (808) is fixedly installed at the rear end of the tapered tube (807). The sliding column (808) is slidably connected in a straight groove (805). The tapered tube (807) is attached to an inclined boss (804). A third knob (809) is fixedly installed at the front end of the threaded rod (806).

7. The PCB spindle fixing device according to claim 6, characterized in that: The lubrication assembly (900) includes a turntable (901) fixedly mounted on a threaded rod (806). An annular groove (902) is provided on the front side of the turntable (901). A piston cylinder (903) is fixedly mounted inside the extension plate (303). A sliding piston (904) is slidably connected through the center of the top of the piston cylinder (903). A sliding column three (905) is fixedly mounted on the rear side of the top of the sliding piston (904). The sliding column three (905) is slidably connected in the annular groove (902). An exhaust pipe (906) is connected to the side of the top of the piston cylinder (903). The exhaust pipe (906) extends to the outside of the extension plate (303). The piston cylinder (903) is connected to an inlet pipe (907) and a drain pipe (908) at its bottom. Both the inlet pipe (907) and the drain pipe (908) are equipped with a one-way valve. An oil storage chamber (909) is provided in the mounting base (301) and the lower support (302). The inlet pipe (907) is connected to the oil storage chamber (909). The left and right side walls of the mounting base (301) at the rear end of the oil storage chamber (909) are provided with spray holes (910). The end of the drain pipe (908) away from the piston cylinder (903) is connected to the spray hole (910). Baffle plates (911) are fixedly installed on the left and right sides of the rear end of the mounting base (301). The baffle plates (911) block the opening of the spray hole (910).

8. The PCB spindle fixing device according to claim 7, characterized in that: The annular groove (902) includes multiple arched grooves, which are arranged in a circular array on the turntable (901), and the ends of two adjacent arched grooves are connected. Each arched groove includes an arc groove (9021), the center of which coincides with the axis of the turntable (901). One end of the arc groove (9021) is connected to a right inclined groove (9022), and the other end of the arc groove (9021) is connected to a left inclined groove (9023).

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