An inverted drill

Abstract

The utility model provides a kind of inverted drilling machine, belong to machining tool technical field.It solves the shortcomings of existing drilling machine: iron filings can fall in the hole of workpiece, thereby affecting machining accuracy;When the hole processed is very deep, iron filings in hole are very difficult to discharge, even it can cause abrasion to the inner wall of hole.The utility model includes frame and the workpiece part and tool part being set on frame, the workpiece part includes driving mechanism one, this driving mechanism one can drive workpiece respectively along Y direction and Z direction moves, the tool part includes driving mechanism two for driving tool rotation, driving mechanism three for driving tool moves along X direction;The workpiece is located above tool, tool vertically upwards to the workpiece above is processed.The utility model's advantage lies in by setting tool below workpiece, tool is punched upwards, iron filings will fall downwards, will not be accumulated in hole.

Description

Technical Field

[0001] This utility model belongs to the field of machine tool technology and relates to an inverted drilling machine. Background Technology

[0002] Traditional drilling machines have a worktable for holding the workpiece, with the cutting tool mounted on the spindle and located above the worktable. The workpiece can be translated along the X and Y axes, and the cutting tool can be vertically raised and lowered along the Z axis to drill holes.

[0003] However, the disadvantages of this type of drilling machine are: iron filings will fall into the hole of the workpiece, thus affecting the machining accuracy; when the hole is very deep, it is difficult to remove the iron filings from the hole, and it may even cause wear to the inner wall of the hole. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems of existing drilling machines by proposing a drilling machine that processes the workpiece and the cutting tool in reverse order.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An inverted drilling machine is characterized by comprising a frame and a workpiece part and a cutting tool part disposed on the frame. The workpiece part includes a first driving mechanism that can drive the workpiece to move along the Y and Z directions respectively. The cutting tool part includes a second driving mechanism that drives the cutting tool to rotate and a third driving mechanism that drives the cutting tool to move along the X direction. The workpiece is located above the cutting tool, and the cutting tool vertically upwards to process the workpiece above it.

[0007] In the aforementioned inverted drilling machine, the drive mechanism includes a crossbeam and a slider. The workpiece is fixed on the slider, which is horizontally slidable on the crossbeam along the Y direction via a slide rail. A lead screw assembly is provided on the crossbeam to drive the slider to move back and forth along the Y direction. The crossbeam is vertically slidable on the frame along the Z direction via a slide rail, and a lead screw assembly is provided on the frame to drive the crossbeam to move up and down along the Z direction.

[0008] In the aforementioned inverted drilling machine, the second drive mechanism includes a spindle, a rotary drive motor, and a cutting tool fixedly connected to the spindle via a tool holder. The output shaft of the rotary drive motor is connected to the spindle for driving the spindle and the cutting tool to rotate.

[0009] In the aforementioned inverted drilling machine, the drive mechanism three includes a slide table, the main shaft is rotatably mounted on the slide table, the drive motor is fixed on the slide table, the slide table is horizontally slidably mounted on the frame along the X direction via a slide rail, and the frame is provided with a lead screw assembly three for driving the slide table to move back and forth along the X direction.

[0010] In the aforementioned inverted drilling machine, the drive mechanism further includes a hydraulic cylinder, the cylinder body of which is fixed on the frame, and the piston rod of which is fixedly connected to the crossbeam.

[0011] In the aforementioned inverted drilling machine, the lead screw assembly includes a lead screw, a lead screw nut, and a drive motor. The lead screw is rotatably mounted on a crossbeam. The lead screw nut is fitted onto the lead screw and fixedly connected to the slider. The output shaft of the drive motor is fixedly connected to the lead screw to drive the lead screw to rotate and to move the slider and workpiece back and forth along the Y direction. The axis of the lead screw extends along the Y direction.

[0012] In the aforementioned inverted drilling machine, the lead screw assembly two includes a lead screw two, a lead screw nut two, and a drive motor two. The lead screw two is rotatably mounted on the frame. The lead screw nut two is sleeved on the lead screw two and fixedly connected to the crossbeam. The output shaft of the drive motor two is fixedly connected to the lead screw two to drive the lead screw two to rotate and drive the crossbeam and the workpiece to rise and fall along the Z direction. The axis of the lead screw two extends along the Y direction.

[0013] In the aforementioned inverted drilling machine, the lead screw assembly includes a lead screw, a lead screw nut, and a drive motor. The lead screw is rotatably mounted on the frame. The lead screw nut is sleeved on the lead screw and fixedly connected to the slide. The output shaft of the drive motor is fixedly connected to the lead screw to drive the lead screw to rotate and to move the slide and the cutting tool back and forth along the X direction. The axis of the lead screw extends along the X direction.

[0014] In the aforementioned inverted drilling machine, the frame is also provided with a tool holder, which has several workstations for placing tools and tool holders.

[0015] In the aforementioned inverted drilling machine, the tool holder includes a fixed plate and a movable plate. The movable plate is movably mounted on the fixed plate via several pins and can be vertically raised and lowered relative to the fixed plate. A spring is also provided between the fixed plate and the movable plate, and the spring is sleeved on the pins.

[0016] In the aforementioned inverted drilling machine, the slider is provided with a clamp for holding the workpiece.

[0017] In the aforementioned inverted drilling machine, the clamp is a three-jaw chuck, which is fixed to the slider via a corner piece.

[0018] In the aforementioned inverted drilling machine, a horizontal mounting platform is provided on the frame, and the slide is slidably mounted on the mounting platform. A protective cover is provided on both sides of the slide, and the protective cover on both sides can be stretched or compressed when the slide moves.

[0019] In the aforementioned inverted drilling machine, the protective cover includes a bellows cover and a steel plate cover, with the steel plate cover located outside the bellows cover.

[0020] In the aforementioned inverted drilling machine, the mounting platform is provided with a material collection trough, with two material collection troughs located on both sides of the main shaft. The protective cover has an inverted V-shaped cross-section, with both ends of the V-shape extending above the two material collection troughs.

[0021] In the aforementioned inverted drilling machine, the main shaft includes a bearing, a mandrel, and a collar. The bearing is fixed on a slide table, the mandrel is rotatably mounted on the bearing, and the collar is fixed on the top of the mandrel and sleeved around its outer circumference. The collar has an annular groove, and the mandrel has a protruding ring fixedly mounted thereon, which is inserted into the groove. The top of the main shaft has a waterproof ring that covers the outer circumference of the mandrel and the collar. A sealing element is provided between the inner wall of the waterproof ring and the outer wall of the mandrel. A second sealing element is provided between the inner wall of the waterproof ring and the outer wall of the collar. The top surface of the collar has an annular groove, and the waterproof ring has a protruding ring fixedly mounted thereon, which is inserted into the groove. A third sealing element is provided between the protruding ring and the groove.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. By placing the cutting tool below the workpiece and drilling upwards, the metal chips will fall downwards and will not accumulate in the hole;

[0024] 2. Because the falling hot iron filings can burn the accordion cover, a steel plate cover is added to the outside of the accordion cover to protect it. The accordion cover has a better sealing effect than the steel plate cover and is waterproof. The two provide double protection.

[0025] 3. Since the workpiece, three-jaw chuck, slider, lead screw assembly one, and crossbeam are very heavy, and these parts are only driven to lift by lead screw assembly two, a hydraulic cylinder is added between the crossbeam and the frame to make the lifting process more stable.

[0026] 4. With the V-shaped structure of the steel plate cover, the iron filings falling from above will fall along the steel plate cover into the collection troughs on both sides, making it easy to collect the iron filings.

[0027] 5. The design of the waterproof rings provides waterproofing for the spindle. The design of two sets of convex rings and grooves and three sets of seals provides multiple waterproofing effects, resulting in better waterproofing.

[0028] 6. During tool changing, the tool holder moves downwards, and after the tool enters a certain position in the spindle's inner hole, the support moves a certain distance to the right to disengage from the tool. The spindle's pawl pulls the tool to complete the tool change. To avoid rigid contact between the spindle and the tool holder, the floating amount of the movable plate can prevent rigid collisions caused by inaccurate positioning. Attached Figure Description

[0029] Figure 1This is a schematic diagram of the overall structure of the drilling machine of this utility model;

[0030] Figure 2 This is a schematic diagram of the second and third drive mechanisms of this utility model;

[0031] Figure 3 This is a schematic diagram of the drive mechanism of this utility model;

[0032] Figure 4 This is a schematic diagram of the drive mechanism of this utility model from another angle;

[0033] Figure 5 This is a schematic diagram of the three-jaw chuck and tool holder of this utility model;

[0034] Figure 6 This is a schematic diagram of the protective cover of this utility model;

[0035] Figure 7 This is a sectional view of the main shaft of this utility model;

[0036] Figure 8 This is an enlarged cross-sectional view of the waterproof ring of this utility model.

[0037] In the diagram, 1. Frame; 2. Crossbeam; 3. Slider; 4. Main shaft; 5. Slide table; 6. Hydraulic cylinder; 7. Lead screw one; 8. Drive motor one; 9. Lead screw two; 10. Drive motor two; 11. Lead screw three; 12. Drive motor three; 14. Tool holder; 15. Three-jaw chuck; 16. Steel plate cover; 17. Collection trough; 18. Corner piece; 19. Rotary drive motor; 20. Mandrel; 21. Collar; 22. Convex ring one; 23. Waterproof ring; 24. Convex ring two; 25. Seal one; 26. Seal two; 27. Seal three; 28. Shaft seat; 30. Fixed plate; 31. Movable plate; 32. Pin; 33. Spring. Detailed Implementation

[0038] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0039] like Figure 1 As shown, the inverted drilling machine of this utility model includes a frame 1 and a workpiece part and a cutting tool part disposed on the frame 1. The workpiece part includes a first driving mechanism that can drive the workpiece to move along the Y and Z directions respectively. The cutting tool part includes a second driving mechanism that drives the cutting tool to rotate and a third driving mechanism that drives the cutting tool to move along the X direction. The workpiece is located above the cutting tool, and the cutting tool vertically upwards to process the workpiece above.

[0040] like Figure 3As shown, the driving mechanism includes a crossbeam 2 and a slider 3. The workpiece is fixed on the slider 3, which is horizontally slidable along the Y-axis on the crossbeam 2 via a slide rail. A lead screw assembly is provided on the crossbeam 2 to drive the slider 3 to move back and forth along the Y-axis. The crossbeam 2 is vertically slidable along the Z-axis on the frame 1 via a slide rail. A lead screw assembly is provided on the frame 1 to drive the crossbeam 2 to move up and down along the Z-axis. Figure 4 As shown, the drive mechanism also includes a hydraulic cylinder 6, the cylinder body of which is fixed on the frame 1, and the piston rod of which is fixedly connected to the crossbeam 2.

[0041] The lead screw assembly includes a lead screw 7, a lead screw nut, and a drive motor 8. The lead screw 7 is rotatably mounted on the crossbeam 2. The lead screw nut is fitted onto the lead screw 7 and fixedly connected to the slider 3. The output shaft of the drive motor 8 is fixedly connected to the lead screw 7 to drive the lead screw 7 to rotate and drive the slider 3 and the workpiece to move back and forth along the Y direction. The axis of the lead screw 7 extends along the Y direction.

[0042] The second lead screw assembly includes a second lead screw 9, a second lead screw nut, and a second drive motor 10. The second lead screw 9 is rotatably mounted on the frame 1. The second lead screw nut is sleeved on the second lead screw 9 and fixedly connected to the crossbeam 2. The output shaft of the second drive motor 10 is fixedly connected to the second lead screw 9 to drive the second lead screw 9 to rotate and drive the crossbeam 2 and the workpiece to rise and fall along the Z direction. The axis of the second lead screw 9 extends along the Y direction.

[0043] like Figure 2 As shown, the second drive mechanism includes a spindle 4 and a rotary drive motor 19. The cutting tool is fixedly connected to the spindle 4 via a tool holder 14. The output shaft of the rotary drive motor 19 is connected to the spindle 4 for driving the spindle 4 and the cutting tool to rotate. The third drive mechanism includes a slide table 5. The spindle 4 is rotatably mounted on the slide table 5. The drive motor is fixedly mounted on the slide table 5. The slide table 5 is horizontally slidable along the X-direction on the frame 1 via a slide rail. The frame 1 is provided with a lead screw assembly 3 for driving the slide table 5 to move back and forth along the X-direction.

[0044] The lead screw assembly includes a lead screw 11, a lead screw nut, and a drive motor 12. The lead screw 11 is rotatably mounted on the frame 1. The lead screw nut is sleeved on the lead screw 11 and fixedly connected to the slide table 5. The output shaft of the drive motor 12 is fixedly connected to the lead screw 11 to drive the lead screw 11 to rotate and drive the slide table 5 and the cutter to move back and forth along the X direction. The axis of the lead screw 11 extends along the X direction.

[0045] like Figure 5As shown, the frame 1 is also equipped with a tool holder, which has several workstations for placing tools and tool holders 14. The tool holder includes a fixed plate 30 and a movable plate 31. The movable plate 31 is movably mounted on the fixed plate 30 via several pins 32 and can be vertically raised and lowered relative to the fixed plate 30. A spring 33 is also provided between the fixed plate 30 and the movable plate 31, and the spring 33 is sleeved on the pins 32. The slider 3 is equipped with a clamp for holding the workpiece. The clamp is a three-jaw chuck 15, which is fixedly connected to the slider 3 via a corner piece 18.

[0046] like Figure 6 As shown, a horizontal mounting platform is provided on the frame 1, and the aforementioned slide 5 is slidably mounted on this mounting platform. A protective cover is provided on both sides of the slide 5, and the slide 5 can stretch or compress the protective covers on both sides when it moves. The protective cover includes a bellows cover and a steel plate cover 16, with the steel plate cover 16 located outside the bellows cover. A material collection trough 17 is provided on the mounting platform, with two material collection troughs 17 located on both sides of the main shaft 4. The protective cover has an inverted V-shaped cross-section, with both ends of the V-shape extending above the two material collection troughs 17.

[0047] Traditional drilling machines have an empty worktable underneath for mounting workpieces. Modern mounting platforms have a rotary drive motor 19 underneath, and the motor is very large. Therefore, the slide table 5 can only move left and right in the X direction. The translational stroke in the Y direction is designed onto the workpiece above.

[0048] like Figure 7 As shown, the spindle includes a bearing seat, a mandrel, and a collar. The bearing seat is fixedly mounted on the slide table, the mandrel is rotatably mounted on the bearing seat, and the collar is fixedly mounted on the top of the mandrel and sleeved around the outer circumference of the mandrel. Figure 8 As shown, the collar has an annular groove, and the spindle has a protruding ring fixedly attached to it, with the protruding ring inserted into the groove. The top of the spindle has a waterproof ring, which covers the outer circumference of the spindle and the collar. A sealing element is provided between the inner wall of the waterproof ring and the outer wall of the spindle. A second sealing element is provided between the inner wall of the waterproof ring and the outer wall of the collar. The top surface of the collar has an annular groove, and a protruding ring is fixedly attached to it, with the protruding ring inserted into the groove. A third sealing element is provided between the protruding ring and the groove.

[0049] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0050] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An inverted drill, characterized in that, It includes a frame (1) and a workpiece part and a cutting tool part disposed on the frame (1). The workpiece part includes a drive mechanism 1, which can drive the workpiece to move along the Y and Z directions respectively. The cutting tool part includes a drive mechanism 2 for driving the cutting tool to rotate and a drive mechanism 3 for driving the cutting tool to move along the X direction. The workpiece is located above the cutting tool, and the cutting tool is vertically upward to process the workpiece above.

2. An inverted drill according to claim 1, wherein, The drive mechanism includes a crossbeam (2) and a slider (3). The workpiece is fixed on the slider (3). The slider (3) is horizontally slidable on the crossbeam (2) along the Y direction via a slide rail. A screw assembly is provided on the crossbeam (2) to drive the slider (3) to move back and forth along the Y direction. The crossbeam (2) is vertically slidable on the frame (1) along the Z direction via a slide rail. A screw assembly is provided on the frame (1) to drive the crossbeam (2) to move up and down along the Z direction.

3. An inverted drill according to claim 1, wherein, The second drive mechanism includes a spindle (4) and a rotary drive motor (19). The tool is fixedly connected to the spindle (4) via a tool holder (14). The output shaft of the rotary drive motor (19) is connected to the spindle (4) for driving the spindle (4) and the tool to rotate.

4. An inverted drill according to claim 3, wherein, The drive mechanism includes a slide (5), a main shaft (4) is rotatably mounted on the slide (5), a drive motor is fixed on the slide (5), the slide (5) is horizontally mounted on the frame (1) via a slide rail, and a lead screw assembly is provided on the frame (1) for driving the slide (5) to move back and forth along the X direction.

5. An inverted drill according to claim 2, wherein, The lead screw assembly includes a lead screw (7), a lead screw nut, and a drive motor (8). The lead screw (7) is rotatably mounted on the crossbeam (2). The lead screw nut is mounted on the lead screw (7) and fixedly connected to the slider (3). The output shaft of the drive motor (8) is fixedly connected to the lead screw (7) to drive the lead screw (7) to rotate and drive the slider (3) and the workpiece to move back and forth along the Y direction. The axis of the lead screw (7) extends along the Y direction.

6. An inverted drill according to claim 2, wherein, The second lead screw assembly includes a second lead screw (9), a second lead screw nut, and a second drive motor (10). The second lead screw (9) is rotatably mounted on the frame (1). The second lead screw nut is sleeved on the second lead screw (9) and fixedly connected to the crossbeam (2). The output shaft of the second drive motor (10) is fixedly connected to the second lead screw (9) to drive the second lead screw (9) to rotate and drive the crossbeam (2) and the workpiece to rise and fall along the Z direction. The axis of the second lead screw (9) extends along the Y direction.

7. An inverted drill according to claim 4, wherein, The lead screw assembly includes a lead screw (11), a lead screw nut, and a drive motor (12). The lead screw (11) is rotatably mounted on the frame (1). The lead screw nut is sleeved on the lead screw (11) and fixedly connected to the slide (5). The output shaft of the drive motor (12) is fixedly connected to the lead screw (11) to drive the lead screw (11) to rotate and drive the slide (5) and the cutter to move back and forth along the X direction. The axis of the lead screw (11) extends along the X direction.

8. An inverted drill according to claim 2, wherein, The frame (1) is also provided with a tool holder, which has several workstations for placing tools and tool holders (14); the tool holder includes a fixed plate (30) and a movable plate (31). The movable plate (31) is movably mounted on the fixed plate (30) through several pins (32) and can be vertically raised and lowered relative to the fixed plate (30). A spring (33) is also provided between the fixed plate (30) and the movable plate (31). The spring (33) is sleeved on the pins (32); the slider (3) is provided with a clamp for holding the workpiece; the clamp is a three-jaw chuck (15), which is fixedly connected to the slider (3) through a corner piece (18).

9. An inverted drill according to claim 4, wherein, A horizontal mounting platform is provided on the frame (1), and the slide (5) is slidably mounted on the mounting platform. A protective cover is provided on both sides of the slide (5). When the slide (5) moves, it can stretch or compress the protective covers on both sides. The protective cover includes a bellows cover and a steel plate cover (16). The steel plate cover (16) is located outside the bellows cover. A material collection trough (17) is provided on the mounting platform. The two material collection troughs (17) are located on both sides of the main shaft (4). The cross-sectional shape of the protective cover is an inverted V-shape. The two ends of the V-shape extend to the top of the two material collection troughs (17).

10. An inverted drill according to claim 4, wherein, The main shaft (4) includes a bearing seat (28), a spindle (20), and a collar (21). The bearing seat (28) is fixed on the slide table (5), the spindle (20) is rotatably mounted on the bearing seat (28), and the collar (21) is fixed on the top of the spindle (20) and sleeved on the outer circumference of the spindle (20). The collar (21) has an annular groove, and the spindle (20) has a protruding ring (22) fixed on it, which is inserted into the groove. A waterproof ring (23) is provided at the top of the ring, which covers the outer periphery of the mandrel (20) and the collar (21). A sealing element (25) is provided between the inner wall of the waterproof ring (23) and the outer wall of the mandrel (20); a sealing element (26) is provided between the inner wall of the waterproof ring (23) and the outer wall of the collar (21); a ring groove (2) is provided on the top surface of the collar (21), and a convex ring (24) is fixed on the waterproof ring (23). The convex ring (24) is inserted into the groove (2), and a sealing element (27) is provided between the convex ring (24) and the groove (2).

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