A drilling depth control device for a drilling machine

Abstract

This application relates to the technical field of drilling machines, and in particular to a drilling depth control device for a drilling machine, comprising a worktable, a drilling mechanism, a lubrication mechanism, and a delay component; the drilling mechanism includes a lead screw rotatably connected to the worktable and a cover fixedly mounted on the worktable; the cover has a sliding groove, in which a sliding block is slidably connected, and a drill bit and a lead screw nut adapted to the lead screw are mounted on the sliding block; a first rotating rod is rotatably connected to the worktable, and a first bevel gear is coaxially fixedly mounted on the first rotating rod; a second bevel gear, meshing with the first bevel gear, is coaxially fixedly mounted on the lead screw. This application can achieve precise control of drilling depth and automatic periodic lubrication of the lead screw through the linkage of the lead screw drive, the delay component, and the lubrication mechanism.

Description

Technical Field

[0001] This application relates to the technical field of drilling machines, and in particular to a drilling depth control device for drilling machines. Background Technology

[0002] In the field of machining, drilling machines are widely used. Accurate control of drilling depth is crucial during the drilling process. Insufficient drilling depth can lead to problems such as insecure installation of connecting parts; excessive drilling depth can damage the workpiece or even cause safety accidents. Existing drilling depth control devices for drilling machines achieve depth control through mechanical limits or sensor detection. However, during long-term use, the lifting screw responsible for controlling the drilling depth experiences significant friction and wear due to frequent rotation, leading to a decrease in screw transmission accuracy and consequently affecting the accuracy of drilling depth control. Current screw lubrication methods often involve manual periodic application of lubricating oil. This method not only increases labor costs but also fails to provide timely lubrication based on the actual working condition of the screw, resulting in poor lubrication effectiveness.

[0003] A search revealed that Chinese Patent Publication No. CN118386413A discloses a drilling depth adjustment device for ceiling construction, comprising a universal wheel, a movable platform fixedly connected to the top of the universal wheel, a limit mechanism inside the movable platform, a lifting mechanism on the top of the movable platform, and an adjustment mechanism on the top of the lifting mechanism. The adjustment mechanism includes a vertical plate, which is disposed on the top front of the lifting mechanism. A U-shaped plate is fixedly connected to the front of the vertical plate, and a servo motor is fixedly connected to the front of the U-shaped plate. A first threaded rod is fixedly connected to the back end of the servo motor, and a threaded plate is threadedly connected to the periphery of the first threaded rod.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Existing technologies require manual, periodic application of lubricating oil to the lead screw, leading to increased labor costs. This application addresses the problems of lead screw wear affecting accuracy and high manual lubrication costs in existing drilling machines by employing lead screw transmission, a time-delay assembly linking the piston cylinder and the oil injection ring sponge block. This achieves precise control of drilling depth, automatic lead screw lubrication, and reduced manual maintenance costs. Utility Model Content

[0005] To reduce manual maintenance costs, this application provides a drilling depth control device for a drilling machine.

[0006] This application provides a drilling depth control device for a drilling machine, employing the following technical solution: It includes a worktable, on which a drilling mechanism, a lubrication mechanism, and a delay component are mounted; the drilling mechanism includes a lead screw rotatably connected to the worktable and a cover fixedly mounted on the worktable; the cover has a sliding groove, within which a sliding block is slidably connected, and a drill bit and a lead screw nut adapted to the lead screw are mounted on the sliding block; the lubrication mechanism includes a hollow oil spray ring fixedly mounted on the lead screw nut, the inner wall of the oil spray ring having a threaded groove adapted to the threaded portion of the lead screw, the threaded groove communicating with the inner cavity of the oil spray ring, and a sponge block mounted on the threaded groove; the oil spray ring has an oil inlet pipe communicating with its inner cavity; a first rotating rod rotatably connected to the worktable, on which a first bevel gear is coaxially fixed; and a second bevel gear coaxially fixed on the lead screw, meshing with the first bevel gear. The drilling machine drills holes in the workpiece, and the lubrication mechanism and delay component provide timed lubrication to the lead screw.

[0007] Optionally, the delay component includes a rotating disk coaxially fixed at one end of the first rotating rod, and the rotating disk is provided with a single tooth.

[0008] Optionally, a vertical plate is fixedly installed on the workbench, and a third bevel gear capable of meshing with teeth is rotatably connected to the vertical plate.

[0009] Optionally, a drive column is rotatably connected to the upright plate, the drive column has a drive groove, and a protrusion is provided in the drive groove; a fourth bevel gear that can mesh with the third bevel gear is coaxially fixed on the drive column.

[0010] Optionally, a piston cylinder is fixedly installed on the upright plate, and a piston rod is slidably connected inside the piston cylinder; a stop rod is provided on the piston rod to abut against the drive groove.

[0011] Optionally, a tension spring is provided on the abutment rod, and the other end of the tension spring is fixedly connected to the upright plate.

[0012] Optionally, the piston cylinder is connected to a three-way pipe; one end of the three-way pipe is connected to the lubricating oil storage tank through a first one-way valve, and the other end of the three-way pipe is connected to the oil inlet pipe through a second one-way valve.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] 1. This utility model uses the rotation of a single tooth on the rotating disk to drive the third bevel gear to rotate a certain angle with each revolution. The third bevel gear drives the drive column to rotate, causing the piston cylinder to draw in grease from the lubricating oil storage tank through negative pressure, and then accurately inject it into the inner cavity of the injection ring through the three-way pipe check valve.

[0015] 2. This utility model uses the threaded groove on the inner wall of the oil spray ring to fit into the threaded part of the lead screw. The built-in sponge block applies lubricating oil synchronously with the rotation of the lead screw, evenly covering the thread gap, reducing friction loss, and avoiding drilling depth errors caused by wear. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0017] Figure 2 This is a top view of the overall structure in the embodiments of this application;

[0018] Figure 3 This is a schematic diagram of the rotating disk in an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of the delay component in an embodiment of this application;

[0020] Figure 5 This is a schematic diagram of the structure of the fuel injection ring in the embodiments of this application.

[0021] Reference numerals: 1. Worktable; 2. Lead screw; 3. Cover; 4. Sliding groove; 5. Sliding block; 6. Drill bit; 7. Oil injection ring; 8. Sponge block; 9. Oil inlet pipe; 10. First rotating rod; 11. First bevel gear; 12. Second bevel gear; 13. Rotating disk; 14. Tooth; 15. Vertical plate; 16. Third bevel gear; 17. Drive column; 18. Drive groove; 19. Protrusion; 20. Fourth bevel gear; 21. Piston cylinder; 22. Piston rod; 23. Push rod; 24. Tension spring; 25. T-connector; 26. First check valve; 27. Second check valve. Detailed Implementation

[0022] The following is in conjunction with the appendix Figures 1-5 This application will be further described in detail below. The technical solutions in the embodiments of this application will be clearly described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0023] This application discloses a drilling depth control device for a drilling machine. For example... Figure 1As shown, the system includes a worktable 1, on which a drilling mechanism, a lubrication mechanism, and a delay component are mounted. The drilling mechanism includes a lead screw 2 rotatably connected to the worktable 1 and a cover 3 fixedly mounted on the worktable 1. A sliding groove 4 is provided on the cover 3, and a sliding block 5 is slidably connected in the sliding groove 4. A drill bit 6 and a lead screw nut adapted to the lead screw 2 are mounted on the sliding block 5. The lubrication mechanism includes a hollow oil spray ring 7 fixedly mounted on the lead screw nut. A threaded groove adapted to the threaded part of the lead screw 2 is provided on the inner wall of the oil spray ring 7. The threaded groove communicates with the inner cavity of the oil spray ring 7, and a sponge block 8 is mounted on the threaded groove. An oil inlet pipe 9 communicating with its inner cavity is provided on the oil spray ring 7. A first rotating rod 10 is rotatably connected to the worktable 1, and a first bevel gear 11 is coaxially fixedly mounted on the first rotating rod 10. A second bevel gear 12 meshing with the first bevel gear 11 is coaxially fixedly mounted on the lead screw 2.

[0024] In this embodiment, the first rotating rod 10 drives the first bevel gear 11 to rotate, and the first bevel gear 11 drives the lead screw 2 to rotate through the second bevel gear 12, thereby driving the sliding block 5 to move and causing the drill bit 6 to rise or fall.

[0025] When lubrication of the lead screw 2 is required, oil is supplied to the inner cavity of the oil injection ring 7. When the oil injection ring 7 rotates, the sponge block 8 in the thread groove applies lubricating oil to the threaded part of the lead screw 2.

[0026] Please see Figure 2 The delay component includes a rotating disk 13 coaxially fixed at one end of the first rotating rod 10, and a single tooth 14 is provided on the rotating disk 13; a vertical plate 15 is fixedly provided on the worktable 1, and a third bevel gear 16 that can mesh with the tooth 14 is rotatably connected to the vertical plate 15.

[0027] In this embodiment, after the first rotating rod 10 drives the rotating disk 13 to rotate one revolution, the teeth 14 on the rotating disk 13 mesh with the third bevel gear 16 once, and drive the third bevel gear 16 to rotate a certain angle.

[0028] Please see Figure 2 and Figure 4 A drive column 17 is rotatably connected to the upright plate 15. A drive groove 18 is provided on the drive column 17, and a protrusion 19 is provided in the drive groove 18. A fourth bevel gear 20 that can mesh with the third bevel gear 16 is coaxially fixed on the drive column 17. A piston cylinder 21 is fixedly provided on the upright plate 15, and a piston rod 22 is slidably connected in the piston cylinder 21. A stop rod 23 that abuts against the drive groove 18 is provided on the piston rod 22. A tension spring 24 is provided on the stop rod 23, and the other end of the tension spring 24 is fixedly connected to the upright plate 15.

[0029] In this embodiment, the third bevel gear 16 can drive the drive column 17 to rotate through the fourth bevel gear 20. Since the piston rod 22 abuts against the drive groove 18 in the drive column 17 through the abutment rod 23, the tension spring 24 drives the abutment rod 23 to always abut against the drive groove 18. As the drive column 17 rotates, when the abutment rod 23 abuts against the protrusion 19, the abutment rod 23 drives the piston rod 22 to move, making the space inside the piston cylinder 21 larger, forming a negative pressure, and drawing the lubricating oil in the lubricating oil storage tank into the piston cylinder 21.

[0030] When the stop rod 23 is not in contact with the protrusion 19, the tension spring 24 drives the stop rod 23 to reset, and the piston rod 22 moves into the piston cylinder 21, making the space inside the piston cylinder 21 smaller, and injecting the lubricating oil in the piston cylinder 21 into the cavity of the oil injection ring 7.

[0031] Please see Figure 4 The piston cylinder 21 is connected to a three-way pipe 25; one end of the three-way pipe 25 is connected to the lubricating oil storage tank through the first one-way valve 26, and the other end of the three-way pipe 25 is connected to the oil inlet pipe 9 through the second one-way valve 27.

[0032] In this embodiment, when the piston cylinder 21 draws oil from the lubricating oil storage tank, the first one-way valve 26 opens and the second one-way valve 27 closes; when the piston cylinder 21 injects oil into the oil injection ring 7, the first one-way valve 26 closes and the second one-way valve 27 opens.

[0033] The implementation principle of a drilling depth control device for a drilling machine according to an embodiment of this application is as follows:

[0034] Rotating the first rotating rod 10 drives the coaxially fixed first bevel gear 11 to rotate. The first bevel gear 11 meshes with the second bevel gear 12 on the lead screw 2, driving the lead screw 2 to rotate. When the lead screw 2 rotates, the matching lead screw nut moves along the axis of the lead screw 2, causing the sliding block 5 to slide up and down in the sliding groove 4 of the cover 3, thereby allowing the drill bit 6 on the sliding block 5 to rise or fall, completing the height adjustment.

[0035] When the first rotating rod 10 rotates, the coaxial rotating disk 13 rotates accordingly; each time the individual tooth 14 on the rotating disk 13 rotates once, it meshes with the third bevel gear 16 on the vertical plate 15, causing the third bevel gear 16 to rotate at a certain angle; the third bevel gear 16 drives the drive column 17 to rotate through the meshing fourth bevel gear 20; there is a protrusion 19 in the drive groove 18 on the drive column 17. When the abutment 23 of the piston rod 22 rotates with the drive column 17 to abut against the protrusion 19, the abutment 23 is pushed outward, and the tension spring 24 is stretched; the abutment 23 drives the piston rod 22 to slide outward in the piston cylinder 21, increasing the space inside the piston cylinder 21 and forming a negative pressure; at this time, the first one-way valve 26 of the three-way pipe 25 opens, and the lubricating oil in the lubricating oil storage tank is drawn into the piston cylinder 21 through the first one-way valve 26;

[0036] As the drive column 17 continues to rotate, when the push rod 23 disengages from the protrusion 19, the tension spring 24 returns to its original position, pulling the push rod 23 inward and causing the piston rod 22 to slide into the piston cylinder 21. The space inside the piston cylinder 21 decreases, and the pressure increases. The increased pressure causes the second check valve 27 of the three-way pipe 25 to open and the first check valve 26 to close. The lubricating oil in the piston cylinder 21 is injected into the inner cavity of the oil injection ring 7 through the second check valve 27 and the oil inlet pipe 9.

[0037] The threaded groove on the inner wall of the oil injection ring 7 is adapted to the threaded part of the lead screw, and a sponge block 8 is provided in the threaded groove; when the lead screw 2 rotates, the oil injection ring 7 moves synchronously with the lead screw nut, and the sponge block 8 contacts the threaded part of the lead screw, so as to evenly coat the lubricating oil on the surface of the lead screw 2 to achieve lubrication.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drilling depth control device for a drilling machine, comprising a worktable (1), characterized in that: The workbench (1) is equipped with a drilling mechanism, a lubrication mechanism, and a delay component; the drilling mechanism includes a lead screw (2) rotatably connected to the workbench (1) and a cover (3) fixedly mounted on the workbench (1); the cover (3) has a sliding groove (4), a sliding block (5) is slidably connected in the sliding groove (4), and a drill bit (6) and a lead screw nut adapted to the lead screw (2) are mounted on the sliding block (5); the lubrication mechanism includes a hollow oil spray ring (7) fixedly mounted on the lead screw nut, and the oil spray ring... (7) The inner wall is provided with a threaded groove that is compatible with the threaded part of the lead screw (2). The threaded groove is connected to the inner cavity of the oil injection ring (7). A sponge block (8) is provided on the threaded groove. An oil inlet pipe (9) is provided on the oil injection ring (7) and is connected to its inner cavity. A first rotating rod (10) is rotatably connected to the worktable (1). A first bevel gear (11) is coaxially fixed on the first rotating rod (10). A second bevel gear (12) that meshes with the first bevel gear (11) is coaxially fixed on the lead screw (2).

2. The drilling depth control device for a drilling machine according to claim 1, characterized in that: The delay component includes a rotating disk (13) coaxially fixed at one end of the first rotating rod (10), and the rotating disk (13) is provided with a single tooth (14).

3. The drilling depth control device for a drilling machine according to claim 1, characterized in that: A vertical plate (15) is fixedly installed on the workbench (1), and a third bevel gear (16) that can mesh with the teeth (14) is rotatably connected to the vertical plate (15).

4. The drilling depth control device for a drilling machine according to claim 3, characterized in that: A drive column (17) is rotatably connected to the upright plate (15). A drive groove (18) is provided on the drive column (17), and a protrusion (19) is provided in the drive groove (18). A fourth bevel gear (20) that can mesh with the third bevel gear (16) is coaxially fixed on the drive column (17).

5. The drilling depth control device for a drilling machine according to claim 3, characterized in that: A piston cylinder (21) is fixedly installed on the upright plate (15), and a piston rod (22) is slidably connected inside the piston cylinder (21); a stop rod (23) is provided on the piston rod (22) to abut against the drive groove (18).

6. The drilling depth control device for a drilling machine according to claim 5, characterized in that: A tension spring (24) is provided on the abutment (23), and the other end of the tension spring (24) is fixedly connected to the upright plate (15).

7. The drilling depth control device for a drilling machine according to claim 5, characterized in that: The piston cylinder (21) is connected to a three-way pipe (25); one end of the three-way pipe (25) is connected to the lubricating oil storage tank through a first one-way valve (26), and the other end of the three-way pipe (25) is connected to the oil inlet pipe (9) through a second one-way valve (27).

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