A three-flank shank high efficiency countersink convenient to install

Abstract

The application relates to the technical field of cutting tools, in particular to a three-side-shank efficient counterbore drill convenient to install, which comprises a chuck base, a first rotating sleeve rotatably installed in the chuck base, an installation rod and a three-side-shank main body, the inner wall of the chuck base is rotatably installed with a first limiting clamping block, the first limiting clamping block is rotatably sleeved with a first rotating sleeve, the first rotating sleeve is rotatably sleeved with a second rotating sleeve, the inner wall of the second rotating sleeve is fixedly connected with a third limiting clamping block for limiting the position of the second rotating sleeve, the moving disc is moved towards the direction close to the thread groove, so that the lubricating oil between the moving disc and the inner wall of the fixed sleeve is compressed, the compressed lubricating oil is pressed into the interspace between the thread groove and the positioning screw rod, and it is worth noting that the smaller the inner diameter of the thread groove is, the closer to the moving frame direction, and when reaching the end of the thread groove, the lubricating oil has no interspace to overflow, so that the fixed sleeve and the positioning screw rod are lubricated.

Description

Technical Field

[0001] This invention relates to the field of cutting tool technology, specifically to a three-sided shank high-efficiency countersink drill that is easy to install. Background Technology

[0002] Countersinks are specialized cutting tools used in machining to process countersunk holes for screws and rivets. Three-sided countersinks, with their equilateral triangular cross-section shank, are widely used in on-site maintenance and small-batch processing scenarios because they do not slip during clamping and have stable torque transmission.

[0003] Currently, existing countersinks typically require a chuck for installation. The shank of the replacement countersink is inserted into the chuck opening, and then the chuck is rotated to hold it in place. The clamping force of the chuck's gripping part on the outer wall of the countersink secures it. This installation method works fine during normal use of the countersink. However, when the countersink gets stuck between itself and the workpiece, lifting the countersink can easily cause it to fall out of the chuck. Furthermore, when replacing the countersink, the chuck's rotating mechanism needs to be repeatedly turned. These mechanisms require lubrication over long-term use; otherwise, the chuck may experience poor clamping or jamming. Lubrication of the chuck requires disassembly, and the lubricating oil inside the chuck is prone to clumping due to low temperatures or long-term friction, easily leading to lubrication failure. Therefore, a new countersink is needed to solve this problem. Summary of the Invention

[0004] The purpose of this invention is to provide a three-sided shank high-efficiency countersink that is easy to install, in order to solve the problems mentioned in the background art, such as the chuck rotation mechanism easily drying out after long-term use, the lubricating oil inside the chuck easily clumping and unable to seep downwards, and the unstable longitudinal installation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a three-sided shank high-efficiency countersinking drill that is easy to install, comprising a chuck base, a first rotating sleeve rotatably installed within the chuck base, a mounting rod, and a three-sided shank body. A first limiting block is rotatably installed on the inner wall of the chuck base. A first rotating sleeve is rotatably fitted onto the first limiting block. A second rotating sleeve is rotatably fitted onto the first rotating sleeve. A third limiting block for limiting the position of the second rotating sleeve is fixedly connected to the inner wall of the second rotating sleeve. A fixing sleeve is fixedly installed at one end of the mounting rod. A threaded groove is formed on the inner wall of the fixing sleeve. A positioning screw is threadedly connected to the inner wall of the threaded groove. A first guide rod is fixedly connected to one end of the positioning screw. A movable disk is fixedly connected to one end of the first guide rod. The outer contour of the movable disk matches the inner contour of the fixing sleeve. A movable frame is fixedly connected to the other end of the positioning screw.

[0006] Preferably, the movable frame is provided with a plurality of first limiting slide grooves, and the inner wall of the first limiting slide groove is slidably connected with a gripper block for limiting the position of the three-sided handle body, and an abutment protrusion is fixedly connected to the gripper block.

[0007] Preferably, the first rotating sleeve is provided with a plurality of second limiting grooves, and the gripper block is slidably connected to the inner wall of the second limiting groove.

[0008] Preferably, the second rotating sleeve is configured as a hollow frustum-shaped sleeve, and the outer wall of the gripper block is in close contact with the inner wall of the second rotating sleeve.

[0009] Preferably, the three-sided handle body is configured as a triangular prism handle, and the side wall of the three-sided handle body is provided with a plurality of limiting grooves, the inner contour of the limiting grooves matching the outer contour of the abutting protrusion.

[0010] Preferably, a countersinking drill body is fixedly connected to one end of the three-sided shank body, the countersinking drill body has multiple countersinking drill slots, and a centering drill is fixedly connected to the countersinking drill body.

[0011] Preferably, a second limiting block is fixedly connected to the fixed sleeve, and the second limiting block restricts the position of the first rotating sleeve.

[0012] Preferably, the chuck base is fixedly connected to the fixing sleeve by a plurality of positioning bolts, wherein the positioning bolts are inclined and pass through the fixing sleeve and the chuck base.

[0013] Preferably, a first sealing ring is fitted on the movable disk, the first sealing ring is set as an annular rubber ring, an oil delivery groove is opened on the movable disk, a lubricating oil injection hole is opened on the fixed sleeve, and a sealing plug is slidably connected to the inner wall of the lubricating oil injection hole.

[0014] Preferably, a fixed frame is fixedly connected to the movable disk, a second guide rod is rotatably installed on the inner wall of the fixed frame, and a cover plate for sealing the oil delivery channel is fixedly connected to the outer wall of the second guide rod.

[0015] A second sealing ring is fixedly connected to the cover plate. The outer contour of the second sealing ring matches the inner contour of the oil channel. A torsion spring is sleeved on the second guide rod. One end of the torsion spring is fixedly connected to the inner wall of the fixed frame, and the other end of the torsion spring is fixedly connected to the outer wall of the cover plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, the abutting protrusions on the outer walls of the three gripper blocks are inserted into the limiting grooves on the outer walls of the three-sided handle body to complete the three-sided fixation of the three-sided handle body. The stability of the triangle makes the three-sided handle body more stable after installation. At this time, the three-sided handle body not only has good installation stability in the lateral direction, but also has the same anti-falling effect in the longitudinal direction.

[0018] 2. In this invention, the movable disk moves toward the direction of the threaded groove, which compresses the lubricating oil between the movable disk and the inner wall of the fixed sleeve. The compressed lubricating oil is pressed into the hole between the threaded groove and the positioning screw. It should be noted that the inner diameter of the threaded groove is smaller as it gets closer to the movable frame. When the threaded groove ends, there is no gap for the lubricating oil to overflow. This lubricates the fixed sleeve and the positioning screw. Even if the lubricating oil clumps and becomes pasty due to low temperature or long-term standing, the lubrication structure can still function normally.

[0019] 3. In this invention, after lubricating oil is added to the lubricating oil injection hole, the lubricating oil is located between the moving disc and the lubricating oil injection hole. When the moving disc moves towards the lubricating oil injection hole, it compresses the lubricating oil between itself and the lubricating oil injection hole, increasing the pressure of the lubricating oil. When the pressure of the lubricating oil on the cover plate after entering the oil delivery channel is greater than the torsional force of the torsion spring, the pressure of the lubricating oil causes the cover plate and the second guide rod to rotate. During rotation, the torsion spring is twisted to store force. At this time, the oil delivery channel is in a state where lubricating oil can pass through, and the lubricating oil enters the other side of the moving disc, completing the replenishment of lubricating oil. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the entire mounting of the countersinking drill body of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the countersinking drill body before installation according to the present invention;

[0022] Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention after the main body of the countersink is installed.

[0023] Figure 4 This is a schematic diagram of the overall exploded view structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the movable frame and its surrounding structure according to the present invention;

[0025] Figure 6 This is a schematic diagram of the movable disk and its surrounding structure according to the present invention;

[0026] Figure 7 This is a schematic diagram of the cross-sectional structure of the movable disk and its surrounding area according to the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0028] In the attached diagram, the components represented by each number are as follows:

[0029] 1. Chuck base; 2. First limiting block; 3. Positioning bolt; 4. First rotating sleeve; 5. Mounting rod; 7. Fixing sleeve; 8. Lubricating oil injection hole; 9. Sealing plug; 10. Second limiting block; 12. Second rotating sleeve; 13. Third limiting block; 14. Positioning screw; 15. First guide rod; 16. Moving disc; 17. First sealing ring; 18. Fixing frame; 19. Second guide rod; 20. Torsion spring; 21. Cover plate; 22. Second sealing ring; 23. Oil delivery channel; 24. Threaded groove; 25. Moving frame; 26. First limiting slide groove; 27. Claw block; 28. Abutting protrusion; 30. Three-sided shank body; 31. Limiting groove; 32. Countersink body; 33. Countersink cutter groove; 34. Centering drill; 35. Second limiting slide groove. Detailed Implementation

[0030] 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.

[0031] This invention provides a technical solution: such as Figure 1 - Figure 8 The diagram shows a conveniently installed three-sided shank high-efficiency countersink, comprising a chuck base 1, a first rotating sleeve 4 rotatably mounted within the chuck base 1, a mounting rod 5, and a three-sided shank body 30. A first limiting block 2 is rotatably mounted on the inner wall of the chuck base 1. The first rotating sleeve 4 is rotatably mounted on the first limiting block 2. A second rotating sleeve 12 is rotatably mounted on the first rotating sleeve 4. A third limiting block 13 for limiting the position of the second rotating sleeve 12 is fixedly connected to the inner wall of the second rotating sleeve 12. A fixing sleeve 7 is fixedly mounted at one end of the mounting rod 5. A threaded groove 24 is formed on the inner wall of the fixing sleeve 7. The screw 14 is connected to the threaded groove 24. One end of the screw 14 is fixedly connected to the first guide rod 15. One end of the first guide rod 15 is fixedly connected to the movable disk 16. The outer contour of the movable disk 16 matches the inner contour of the fixed sleeve 7. The other end of the screw 14 is fixedly connected to the movable frame 25. The screw 14 rotates along the threaded groove 24. The threaded connection allows the screw 14 to move away from the fixed sleeve 7 with the movable frame 25, and rotates while moving. It should be noted that the inner diameter of the threaded groove 24 is smaller as it gets closer to the movable frame 25. When it reaches the end of the threaded groove 24, there is no gap for lubricating oil to overflow.

[0032] The movable frame 25 is provided with multiple first limiting slide grooves 26. The inner wall of the first limiting slide groove 26 is slidably connected to a gripper block 27 for limiting the position of the three-sided handle body 30. An abutting protrusion 28 is fixedly connected to the gripper block 27. During the movement, the gripper block 27 abuts against the inner contour of the frustum of the second rotating sleeve 12, causing the multiple gripper blocks 27 to continue to move. The greater the movement distance, the smaller the included angle between the multiple gripper blocks 27.

[0033] The first rotating sleeve 4 has multiple second limiting grooves 35, and the gripper block 27 is slidably connected to the inner wall of the second limiting groove 35.

[0034] The second rotating sleeve 12 is configured as a hollow frustum-shaped sleeve, and the outer wall of the gripper block 27 is in close contact with the inner wall of the second rotating sleeve 12.

[0035] The three-sided handle body 30 is configured as a triangular prism handle. Multiple limiting grooves 31 are provided on the side wall of the three-sided handle body 30. The inner contour of the limiting groove 31 matches the outer contour of the abutting protrusion 28. The abutting protrusion 28 on the outer wall of the three gripper blocks 27 is inserted into the limiting groove 31 on the outer wall of the three-sided handle body 30 to complete the three-sided fixation of the three-sided handle body 30. The stability of the triangle makes the three-sided handle body 30 more stable after installation. At this time, the three-sided handle body 30 not only has good installation stability in the lateral direction, but also has the same anti-detachment effect in the longitudinal direction.

[0036] One end of the three-sided shank body 30 is fixedly connected to a countersinking drill body 32. The countersinking drill body 32 has multiple countersinking cutter grooves 33 and a centering drill 34 is fixedly connected to it. The countersinking drill body 32 has three countersinking cutter grooves 33, so that the countersinking drill body 32 has three countersinking cutters. When countersinking, it is subjected to force from multiple sides, which greatly increases the service life compared to a single countersinking cutter. In addition, a centering drill 34 is also provided at the front end of the countersinking drill body 32 to prevent slippage in the early stage of drilling.

[0037] A second limiting block 10 is fixedly connected to the fixed sleeve 7, and the second limiting block 10 restricts the position of the first rotating sleeve 4.

[0038] The chuck base 1 is fixedly connected to the fixed sleeve 7 by multiple positioning bolts 3, and the positioning bolts 3 pass obliquely through the fixed sleeve 7 and the chuck base 1.

[0039] The movable disk 16 is fitted with a first sealing ring 17, which is a ring-shaped rubber ring. The movable disk 16 is provided with an oil delivery groove 23, and the fixed sleeve 7 is provided with a lubricating oil injection hole 8. A sealing plug 9 is slidably connected to the inner wall of the lubricating oil injection hole 8. Lubricating oil is replenished to the inner wall of the fixed sleeve 7 through the lubricating oil injection hole 8, but the lubricating oil injection hole 8 is blocked by the sealing plug 9 when not replenishing.

[0040] A fixed frame 18 is fixedly connected to the movable disk 16. A second guide rod 19 is rotatably installed on the inner wall of the fixed frame 18. A cover plate 21 for sealing the oil delivery channel 23 is fixedly connected to the outer wall of the second guide rod 19.

[0041] A second sealing ring 22 is fixedly connected to the cover plate 21. The outer contour of the second sealing ring 22 matches the inner contour of the oil delivery channel 23. A torsion spring 20 is sleeved on the second guide rod 19. One end of the torsion spring 20 is fixedly connected to the inner wall of the fixed frame 18, and the other end of the torsion spring 20 is fixedly connected to the outer wall of the cover plate 21.

[0042] Working principle: When using this easy-to-install three-sided shank high-efficiency countersink, firstly, when changing the drill bit, hold the outer wall of the chuck base 1 with one hand and the outer wall of the first rotating sleeve 4 with the other hand, then rotate the first rotating sleeve 4. When the first rotating sleeve 4 rotates, it causes the multiple jaw blocks 27 of the second limit slide groove 35 to rotate synchronously. When the multiple jaw blocks 27 move in a circle, they will cause the first limit slide groove 26 and the moving frame 25 to be subjected to rotational force, causing the moving frame 25 to rotate synchronously. When the moving frame 25 rotates, it causes the positioning screw 14 to rotate synchronously. The positioning screw 14 rotates along the threaded groove 24. The threaded connection causes the positioning screw 14 to move the moving frame 25 away from the fixed sleeve. The moving frame 25 moves in the direction of 7 and rotates while moving. At this time, the moving frame 25 moves synchronously with multiple gripper blocks 27. During the movement, the gripper blocks 27 abut against the inner contour of the truncated cone of the second rotating sleeve 12, causing the multiple gripper blocks 27 to continue moving. The greater the moving distance, the smaller the included angle between the multiple gripper blocks 27, until the abutting protrusions 28 on the outer wall of the three gripper blocks 27 are inserted into the limiting groove 31 on the outer wall of the three-sided handle body 30, thus completing the three-sided fixation of the three-sided handle body 30. The stability of the triangle makes the three-sided handle body 30 more stable after installation. At this time, the three-sided handle body 30 not only has good installation stability in the lateral direction, but also has an anti-falling effect in the longitudinal direction.

[0043] The countersink body 32 has three countersink cutter grooves 33, which means that the countersink body 32 has three countersink cutters. When countersinking, it is subjected to force from multiple sides, which greatly increases the service life compared to a single countersink cutter. In addition, a centering drill 34 is provided at the front end of the countersink body 32 to prevent slippage in the early stage of drilling.

[0044] When the positioning screw 14 rotates along the threaded groove 24, the threaded connection with the threaded groove 24 causes the positioning screw 14 to rotate and move horizontally at the same time. The movement of the positioning screw 14 causes the first guide rod 15 and the moving disk 16 to move synchronously. The first guide rod 15 and the moving disk 16 also rotate while moving. The moving disk 16 moves towards the threaded groove 24, which compresses the lubricating oil between the moving disk 16 and the inner wall of the fixed sleeve 7. The compressed lubricating oil is forced into the gap between the threaded groove 24 and the positioning screw 14. It should be noted that the inner diameter of the threaded groove 24 is smaller as it gets closer to the moving frame 25. When the threaded groove 24 ends, there is no gap for the lubricating oil to overflow. This lubricates the fixed sleeve 7 and the positioning screw 14. Even if the lubricating oil clumps and becomes pasty due to low temperature or long-term standing, the lubrication structure can still function normally.

[0045] Furthermore, the active lubrication process is carried out automatically during the assembly and replacement of the countersink body 32, which further reduces the rotational resistance during the assembly process and makes installation easier.

[0046] When disassembling the main body 32 of the countersink, the first rotating sleeve 4 needs to be twisted in the opposite direction. At this time, the moving disk 16 moves towards the lubricating oil injection hole 8. It should be noted that lubricating oil can be added to the inner wall of the fixed sleeve 7 through the lubricating oil injection hole 8, but the lubricating oil injection hole 8 is blocked by the sealing plug 9 when not adding oil.

[0047] After adding lubricating oil to the lubricating oil injection hole 8, the lubricating oil is located between the moving plate 16 and the lubricating oil injection hole 8. When the moving plate 16 moves towards the lubricating oil injection hole 8, it compresses the lubricating oil between itself and the lubricating oil injection hole 8, increasing the pressure of the lubricating oil. When the lubricating oil enters the oil delivery channel 23 and the pressure on the cover plate 21 is greater than the torsional force of the torsion spring 20, the pressure of the lubricating oil causes the cover plate 21 and the second guide rod 19 to rotate. During the rotation, the torsion spring 20 is twisted to store its force. At this time, the oil delivery channel 23 opens, and the lubricating oil enters the other side of the moving plate 16, completing the replenishment of lubricating oil.

[0048] When the movable disk 16 moves, it will rotate simultaneously. When the movable disk 16 moves, the first sealing ring 17 on the outer wall will slide against the inner wall of the fixed sleeve 7. When rotating, the outer wall of the movable disk 16 will rub against the lubricating oil on the inner wall of the fixed sleeve 7, causing some clumps of lubricating oil to be scraped off from the inner wall of the fixed sleeve 7, and some clumps of lubricating oil to be broken up by friction.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0050] 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 three-sided shank high-efficiency countersinking drill that is easy to install, comprising a chuck base (1), a first rotating sleeve (4) rotatably installed in the chuck base (1), a mounting rod (5), and a three-sided shank body (30), characterized in that: The inner wall of the chuck base (1) is rotatably fitted with a first limiting block (2), a first rotating sleeve (4) is rotatably fitted on the first limiting block (2), a second rotating sleeve (12) is rotatably fitted on the first rotating sleeve (4), a third limiting block (13) for limiting the position of the second rotating sleeve (12) is fixedly connected to the inner wall of the second rotating sleeve (12), a fixing sleeve (7) is fixedly installed at one end of the mounting rod (5), a threaded groove (24) is opened on the inner wall of the fixing sleeve (7), a positioning screw (14) is threadedly connected to the inner wall of the threaded groove (24), a first guide rod (15) is fixedly connected to one end of the positioning screw (14), a movable disk (16) is fixedly connected to one end of the first guide rod (15), the outer contour of the movable disk (16) matches the inner contour of the fixing sleeve (7), and a movable frame (25) is fixedly connected to the other end of the positioning screw (14). The movable frame (25) is provided with a plurality of first limiting slide grooves (26), and the inner wall of the first limiting slide groove (26) is slidably connected with a gripper block (27) for limiting the position of the three-sided handle body (30), and an abutting protrusion (28) is fixedly connected to the gripper block (27). The three-sided handle body (30) is configured as a triangular prism handle, and the side wall of the three-sided handle body (30) is provided with a plurality of limiting grooves (31), the inner contour of the limiting grooves (31) matches the outer contour of the abutting protrusion (28); The movable disk (16) is fitted with a first sealing ring (17), which is a ring-shaped rubber ring. The movable disk (16) is provided with an oil delivery groove (23), and the fixed sleeve (7) is provided with a lubricating oil injection hole (8). The inner wall of the lubricating oil injection hole (8) is slidably connected with a sealing plug (9). A fixed frame (18) is fixedly connected to the movable disk (16). A second guide rod (19) is rotatably installed on the inner wall of the fixed frame (18). A cover plate (21) for sealing the oil delivery channel (23) is fixedly connected to the outer wall of the second guide rod (19). A second sealing ring (22) is fixedly connected to the cover plate (21). The outer contour of the second sealing ring (22) matches the inner contour of the oil channel (23). A torsion spring (20) is sleeved on the second guide rod (19). One end of the torsion spring (20) is fixedly connected to the inner wall of the fixed frame (18), and the other end of the torsion spring (20) is fixedly connected to the outer wall of the cover plate (21).

2. The easy-to-install three-sided shank high-efficiency countersink as described in claim 1, characterized in that: The first rotating sleeve (4) is provided with a plurality of second limiting grooves (35), and the gripper block (27) is slidably connected to the inner wall of the second limiting groove (35).

3. The easy-to-install three-sided shank high-efficiency countersink as described in claim 1, characterized in that: The second rotating sleeve (12) is configured as a hollow frustum-shaped sleeve, and the outer wall of the gripper block (27) is in close contact with the inner wall of the second rotating sleeve (12).

4. The easy-to-install three-sided shank high-efficiency countersink as described in claim 1, characterized in that: One end of the three-sided handle body (30) is fixedly connected to a countersinking drill body (32), and the countersinking drill body (32) is provided with multiple countersinking drill slots (33). A centering drill (34) is fixedly connected to the countersinking drill body (32).

5. A three-sided shank high-efficiency countersinking drill that is easy to install according to claim 1, characterized in that: A second limiting block (10) is fixedly connected to the fixed sleeve (7), and the second limiting block (10) restricts the position of the first rotating sleeve (4).

6. A three-sided shank high-efficiency countersink as described in claim 1, characterized in that: The chuck base (1) is fixedly connected to the fixed sleeve (7) by a plurality of positioning bolts (3), wherein the positioning bolts (3) are inclined through the fixed sleeve (7) and the chuck base (1).

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