Gantry type drilling mechanism for numerical control gang drill

Abstract

The utility model provides a gantry type drilling mechanism for a numerical control gang drill, which belongs to the field of wood-working machinery and comprises a portal frame crossing a working table of the numerical control gang drill, a cross beam of the portal frame is positioned above the working table and is provided with a sliding hanging bracket in a sliding manner, and the sliding hanging bracket is provided with a driving component. The driving assembly is provided with the gang drill package in a transmission mode and drives the gang drill package to be close to or away from the workbench, the gang drill package and the related driving assembly are separated from the workbench through cooperation of the portal frame and the sliding hanging bracket, and the situation that the driving assembly occupies the space of the workbench and hinders feeding and discharging of the conveying structure can be avoided; the assembling flexibility of the numerical control gang drill is improved, and the machining efficiency is improved to a certain degree.

Description

Technical Field

[0001] This utility model belongs to the field of woodworking machinery, and in particular relates to a gantry drilling mechanism for CNC drilling. Background Technology

[0002] As a core piece of equipment in panel furniture processing, CNC multi-spindle drilling machines use a computer numerical control system to control multi-axis drill bits to achieve automated drilling operations. A typical system includes a CAD / CAM programming module, a servo drive unit, and a displacement feedback device, which can convert design drawings into pulse signal commands to precisely control the drill bit speed (adjustable from 200-3000 r / min), feed rate (5-15 m / min), and three-dimensional motion trajectory.

[0003] However, existing CNC drilling kits and their related drive components are all mounted on the worktable. The drive components, such as slide rails and ball screws, require a certain length, which occupies the space of the worktable and hinders the feeding and unloading of materials by the conveying structure. This affects the assembly flexibility of the equipment and makes the worktable space underutilized. Summary of the Invention

[0004] Based on the aforementioned problems in the existing technology, this utility model provides a gantry drilling mechanism for CNC multi-spindle drilling, which includes a gantry frame spanning the worktable of the CNC multi-spindle drilling machine. The crossbeam of the gantry frame is located above the worktable and is slidably mounted with a sliding hanger. The sliding hanger is equipped with a drive assembly, and the drive assembly drives the multi-spindle drilling machine to move closer to or away from the worktable.

[0005] The sliding hanger has a U-shaped structure. Sliding motors are installed on both sides of the opening of the U-shaped structure. The drive shafts of the sliding motors extend towards the central axis of the U-shaped structure and are fixedly mounted with sliding gears. Sliding racks matching the sliding gears are fixedly installed on both sides of the crossbeam. The sliding racks mesh with the sliding gears on the corresponding side. A stabilizing slide rail parallel to the sliding rack is fixedly installed on one side of the crossbeam. Stabilizing sliders corresponding to the stabilizing slide rails are provided on both sides of the opening of the U-shaped structure.

[0006] The drive assembly includes an X-axis drive structure, a Y-axis drive structure, and a Z-axis drive structure. The Y-axis drive structure is installed on the Z-axis drive structure and is driven by the Z-axis drive structure to move along the Z-axis direction. The X-axis drive structure is installed on the Y-axis drive structure and is driven by the Y-axis drive structure to move along the Y-axis direction. The drill pack is installed on the X-axis drive structure and is driven by the X-axis drive structure to move along the X-axis direction.

[0007] The Z-axis drive structure includes a Z-axis drive motor fixedly mounted to the sliding hanger, a Z-axis ball screw driven by the Z-axis drive motor, the Z-axis ball screw being rotatably mounted to the sliding hanger via an oil-sealed bearing structure, and a support sleeve being mounted to drive the Z-axis ball screw to move. The Y-axis drive structure and the support sleeve are fixedly connected.

[0008] The Y-axis drive structure includes a Y-axis mounting plate fixedly connected to a support sleeve. A Y-axis drive motor is fixedly mounted on the Y-axis mounting plate. A Y-axis ball screw is driven by the Y-axis drive motor and is rotatably mounted on the Y-axis mounting plate via an oil-sealed bearing structure. The Y-axis ball screw drives the X-axis drive structure to move. A Y-axis balance rail is also fixedly mounted on the Y-axis mounting plate. The Y-axis balance rail is parallel to the Y-axis ball screw, and the X-axis drive structure is slidably connected to the Y-axis balance rail. Several guide shafts are also fixedly mounted on the Y-axis mounting plate. The guide shafts are parallel to the Z-axis ball screw, and the sliding hanger is fixedly mounted with guide sleeves that slide in a one-to-one manner with the guide shafts.

[0009] The X-axis drive structure includes an X-axis mounting plate connected to a Y-axis ball screw drive. A Y-axis balance block, which slides with the Y-axis balance rail, is fixedly mounted on the X-axis mounting plate. An X-axis drive motor is fixedly mounted on the X-axis mounting plate, and the X-axis drive motor drives and mounts an X-axis ball screw. The X-axis ball screw and the Y-axis ball screw are perpendicular to each other. The X-axis ball screw is rotatably mounted on the X-axis mounting plate via an oil-sealed bearing structure. A drill bag mounting seat is driven to move by the X-axis ball screw, and the drill bag is fixedly mounted on the drill bag mounting seat. The X-axis mounting plate also has an X-axis balance rail fixedly mounted on it, which is parallel to the X-axis ball screw. The drill bag mounting seat is slidably connected to the X-axis balance rail via the X-axis balance block.

[0010] The oil seal bearing structure includes a rotary bearing and oil seal rings fixedly installed on both sides of the rotary bearing. The oil seal rings seal the gap between the inner and outer rings of the rotary bearing. Balls are slidably installed between the inner and outer rings of the rotary bearing and filled with lubricating oil. An X-axis ball screw, Y-axis ball screw, or Z-axis ball screw is interference-fitted through the inner ring of the rotary bearing corresponding to the oil seal bearing structure.

[0011] The oil seal ring and the rotary bearing are coaxially arranged, and the cross-section of the oil seal ring is U-shaped. The opening of the U-shape faces the opposite direction of the rotary bearing, and the bottom of the U-shape fits against the side of the rotary bearing and covers the gap between the inner and outer rings of the rotary bearing.

[0012] The beneficial effects of this utility model are as follows: by using the gantry and sliding hanger together, the drilling bag and its related drive components and worktable can be separated, which can avoid the drive components occupying the space of the worktable and hindering the feeding and discharging of the conveying structure, thus improving the assembly flexibility of CNC drilling and improving the processing efficiency to a certain extent; in addition, the gantry can also provide installation space for more structures and enrich the functions of CNC drilling.

[0013] In addition, the oil seal bearing structure formed by the synergistic cooperation of the oil seal ring and the rotary bearing can effectively prevent wood dust from entering the bearing cavity, while increasing the amount of lubricating oil filling the gap between the inner and outer rings of the bearing. This can reduce the maintenance frequency of the bearing and significantly improve the stability of continuous operation and the maintenance of machining accuracy of CNC drilling machines in dusty environments. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a gantry drilling mechanism used in CNC drilling.

[0015] Figure 2 This is a schematic diagram showing the coordination of the sliding hanger, drive assembly, and drill bit.

[0016] Figure 3 This is a structural diagram of the drive component, which hides part of the sliding hanger.

[0017] Figure 4 This is a partial structural diagram of the driver component.

[0018] Figure 5 This is a structural diagram of the drive component from another angle.

[0019] Figure 6 yes Figure 5 Enlarged view of point A.

[0020] Figure 7 This is a three-dimensional structural diagram of an oil seal bearing.

[0021] Figure 8 This is a schematic diagram of the cross-sectional planar structure of the oil seal bearing and the motor mounting base.

[0022] Figure 9 It is a schematic diagram showing the assembly of the pressing structure, clamping structure, drive assembly, drilling rig, and wooden board. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] As attached Figure 1-8The diagram illustrates a gantry drilling mechanism for CNC multi-spindle drilling, comprising a gantry frame 1 spanning the worktable of the CNC multi-spindle drilling machine. A crossbeam of the gantry frame 1 is located above the worktable and a sliding hanger 2 is slidably mounted thereon. The sliding hanger 2 has a U-shaped structure. A sliding motor is installed on both sides of the opening of the U-shape of the sliding hanger 2, and the drive shaft of the sliding motor extends towards the central axis of the U-shape and is fixedly mounted with a sliding gear 3. Sliding racks 4, matching the sliding gears 3, are fixedly mounted on both sides of the crossbeam. The crossbeam passes through the U-shape of the sliding hanger 2, allowing the sliding hanger 2 to span both sides and the lower surface of the crossbeam. The sliding racks 4 mesh with the corresponding sliding gears 3. A stabilizing rail 5, parallel to the sliding racks 4, is fixedly mounted below each side of the crossbeam. Two stabilizing rails 5 are installed on both sides of the crossbeam. The sliding hanger 2 has corresponding sliding engagement rails 5 on both sides of the opening of the U-shape. The stabilizing slider 6 and the sliding motor drive the sliding hanger 2 to slide along the stabilizing slide rail 5 through the cooperation of the sliding gear 3 and the sliding rack 4. The sliding hanger 2 and both sides of the crossbeam are slidably connected to improve sliding stability and load-bearing capacity. The sliding hanger 2 is equipped with a drive assembly, which includes an X-axis drive structure 8, a Y-axis drive structure 9 and a Z-axis drive structure 10. The Y-axis drive structure 9 is installed on the Z-axis drive structure 10 and is driven by the Z-axis drive structure 10 to move along the Z-axis direction. The X-axis drive structure 8 is installed on the Y-axis drive structure 9 and is driven by the Y-axis drive structure 9 to move along the Y-axis direction. A multi-drill pack 7 is installed on the X-axis drive structure 8 and is driven by the X-axis drive structure 8 to move along the X-axis direction. The movement in the Y-axis and Z-axis directions is combined to drive the multi-drill pack 7 to move closer to or away from the worktable. The X-axis and Y-axis directions are horizontal and perpendicular to each other, while the Z-axis direction is vertical.

[0025] In a preferred embodiment, the Z-axis drive structure 10 includes a Z-axis drive motor 11 fixedly mounted on the upper surface of the sliding hanger 2. The Z-axis drive motor 11 is driven by a ball screw 12 via a perforated coupling. The ball screw 12 extends downward through the sliding hanger 2 and is rotatably mounted on the sliding hanger 2 via an oil-sealed bearing structure 13. A support sleeve 14 is fixedly mounted on the slider of the Z-axis ball screw 12, and the support sleeve 14 is moved by the slider. The support sleeve 14 is slidably connected to the sliding hanger 2 via a sliding sleeve. The Y-axis drive structure 9 includes a Y-axis mounting plate 15 whose upper surface is fixedly connected to the support sleeve 14. A Y-axis drive motor is fixedly mounted on the lower surface of the Y-axis mounting plate 15 via a motor mounting seat 16. The Y-axis drive motor 17 is also equipped with the screw section of the Y-axis ball screw 18 via a plum blossom coupling. The screw section of the Y-axis ball screw 18 is rotatably mounted to the motor mounting base 16 via the oil seal bearing structure 13, and then mounted to the Y-axis mounting plate 15 via the motor mounting base 16. The slider of the Y-axis ball screw 18 is fixedly connected to the X-axis mounting plate 19 of the X-axis drive structure 8, and drives the X-axis drive structure 8 to move via the slider. Two Y-axis balance rails 20 are also fixedly mounted on the lower surface of the Y-axis mounting plate 15. The two Y-axis balance rails 20 are parallel to and symmetrically arranged on both sides of the Y-axis ball screw 18. The X-axis drive structure 8 and the Y-axis balance rails 20 are slidably connected. The Y-axis mounting plate 15... Four guide shafts 21 are fixedly installed on the upper surface. The four guide shafts 21 are divided into two groups, with two guide shafts 21 forming one group. The top ends of the two guide shafts 21 in each group are fixedly connected by a synchronizing rod 22. The guide shafts 21 are parallel to the Z-axis ball screw 12. The sliding hanger 2 is fixedly installed with guide sleeves 23 that slide in a one-to-one manner with the guide shafts 21. The X-axis drive structure 8 includes an X-axis mounting plate 19 that is fixedly connected to the slider of the Y-axis ball screw 18. A Y-axis balance block that slides in a manner with the Y-axis balance rail 20 is fixedly installed on the upper surface of the X-axis mounting plate 19. An X-axis drive motor 24 is fixedly installed on the lower surface of the X-axis mounting plate 19. The X-axis drive motor 24 is also mounted with the X-axis ball screw 26 via a perforated coupling. The ball screw section of the X-axis ball screw 26 and the Y-axis ball screw 18 are perpendicular to each other. The ball screw section of the X-axis ball screw 26 is rotatably mounted to the motor mounting base 16 through the oil seal bearing structure 13, and then fixedly mounted to the X-axis mounting plate 19 through the motor mounting base 16. The slider of the X-axis ball screw 26 is fixedly mounted with a drill bag mounting base 27, and the drill bag mounting base 27 is moved by the slider. The drill bag 7 is fixedly mounted to the drill bag mounting base 27. Two X-axis balance rails 25 are also fixedly mounted on the lower surface of the X-axis mounting plate 19. The two X-axis balance rails 25 are parallel to the X-axis ball screw 26 and are symmetrically arranged on both sides of the X-axis ball screw 26. The drill bag mounting base 27 is slidably connected to the X-axis balance block and the X-axis balance rails 25.

[0026] In a preferred embodiment, the oil seal bearing structure 13 includes a rotary bearing 28 and oil seal rings 29 fixedly installed on both sides of the rotary bearing 28. The oil seal rings 29 and the rotary bearing 28 are coaxially arranged, and the cross-section of the oil seal rings 29 is U-shaped. The opening of the U-shape faces the opposite direction of the rotary bearing 28, and the bottom of the U-shape fits against the side of the rotary bearing 28 and covers the gap between the inner and outer rings of the rotary bearing 28. The length of the side wall of the U-shape can be adjusted according to the actual situation to facilitate the fixed installation of the oil seal bearing structure 13 onto the motor mounting base 16 and other structures. Balls are slidably installed between the inner and outer rings of the rotary bearing 28 and filled with lubricating oil. The X-axis ball screw 26, Y-axis ball screw 18, or Z-axis ball screw 12 are interference-fitted through the inner ring of the corresponding rotary bearing 28 of the oil seal bearing structure 13.

[0027] The drilling mechanism provided in this embodiment drives the multi-mass drill bit 7 to a suitable position and perform drilling operations through the cooperation of the sliding hanger 2, X-axis drive structure 8, Y-axis drive structure 9, and Z-axis drive structure 10. Because the gantry 1 and sliding hanger 2 are provided, and the drive assembly and multi-mass drill bit 7 are mounted on the sliding hanger 2, the drive assembly and multi-mass drill bit 7 are separated from the worktable. This avoids the drive assembly and multi-mass drill bit 7 occupying worktable space, increases the upper limit of the applicable plate size for worktables of the same area, and avoids affecting the feeding and discharging of the conveying structure, making the feeding and discharging design smoother and more flexible, thus improving processing efficiency to a certain extent. Figure 9 As shown, the pressing structure and clamping structure can also be installed on the sliding hanger 2 to improve the equipment's versatility for plate dimensions.

[0028] Furthermore, through the innovative design of the oil seal bearing structure 13, the oil seal ring 29 and the rotary bearing 28 work together to create a sealing interface on the side of the rotary bearing 28 and use an interference fit, which can effectively prevent sawdust and dust from entering the bearing cavity. At the same time, the oil seal structure increases the amount of lubricating oil filling the gap between the inner and outer rings of the bearing and reduces the loss rate, thereby reducing the maintenance frequency of the equipment and significantly improving the stability of continuous operation and the maintenance accuracy of CNC drilling in dusty environments.

[0029] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gantry type drilling mechanism for a numerical control gang drill, characterized by, It include gantry (1) across the worktable of numerical control gang drill, the crossbeam of gantry (1) is located above the worktable and is slidably mounted with sliding bracket (2), sliding bracket (2) is mounted with drive assembly, drive assembly is mounted with gang drill drill package (7) and drives gang drill drill package (7) to be close to or away from the worktable.

2. The gantry drilling mechanism for numerical control gang drill according to claim 1, characterized in that, The sliding bracket (2) is a U-shaped structure, the sliding motor is provided on both sides of the opening of the U-shaped structure, and the driving shaft of the sliding motor extends towards the central axis of the U-shaped structure and is fixedly installed with a sliding gear (3), both sides of the crossbeam are fixedly installed with a sliding rack (4) matched with the sliding gear (3), the sliding rack (4) is engaged with the sliding gear (3) on the corresponding side, and the crossbeam is fixedly installed with a stable sliding rail (5) parallel to the sliding rack (4) on one side of the sliding rack (4), and the sliding bracket (2) is provided with a stable sliding block (6) on both sides of the opening of the U-shaped structure, which is slidably matched with the stable sliding rail (5).

3. The gantry drilling mechanism for numerical control gang drill according to claim 2, characterized in that, The drive assembly includes an X-axis drive structure (8), a Y-axis drive structure (9) and a Z-axis drive structure (10), the Y-axis drive structure (9) is mounted to the Z-axis drive structure (10) and is driven by the Z-axis drive structure (10) to move along the Z-axis direction, the X-axis drive structure (8) is mounted to the Y-axis drive structure (9) and is driven by the Y-axis drive structure (9) to move along the Y-axis direction, and the gang drill drill package (7) is mounted to the X-axis drive structure (8) and is driven by the X-axis drive structure (8) to move along the X-axis direction.

4. The gantry drilling mechanism for numerical control gang drill according to claim 3, characterized in that, The Z-axis drive structure (10) includes a Z-axis drive motor (11) fixedly installed to the sliding bracket (2), the Z-axis drive motor (11) is drivingly installed with a Z-axis ball screw (12), the Z-axis ball screw (12) is rotatably installed to the sliding bracket (2) through an oil seal bearing structure (13), and the Z-axis ball screw (12) is drivingly installed with a support sleeve (14).

5. The gantry drilling mechanism for numerical control gang drill according to claim 4, characterized in that, The Y-axis drive structure (9) includes a Y-axis mounting plate (15) fixedly connected with the support sleeve (14), the Y-axis mounting plate (15) is fixedly installed with a Y-axis drive motor (17), the Y-axis drive motor (17) is drivingly installed with a Y-axis ball screw (18), the Y-axis ball screw (18) is rotatably installed to the Y-axis mounting plate (15) through an oil seal bearing structure (13), and the Y-axis ball screw (18) drives the X-axis drive structure (8) to move; the Y-axis mounting plate (15) is further fixedly installed with a Y-axis balance rail (20), the Y-axis balance rail (20) is parallel to the Y-axis ball screw (18), the X-axis drive structure (8) and the Y-axis balance rail (20) are slidably connected; the Y-axis mounting plate (15) is further fixedly installed with a plurality of guide shafts (21), the guide shafts (21) are parallel to the Z-axis ball screw (12), and the sliding bracket (2) is fixedly installed with guide sliding sleeves (23) slidably matched with the guide shafts (21) one by one.

6. The gantry drilling mechanism for numerical control gang drilling according to claim 5, characterized in that, The X-axis driving structure (8) comprises an X-axis mounting plate (19) in transmission connection with a Y-axis ball screw (18), the X-axis mounting plate (19) is fixedly installed with a Y-axis balance block in sliding fit with a Y-axis balance rail (20), the X-axis mounting plate (19) is fixedly installed with an X-axis driving motor (24), the X-axis driving motor (24) is drivingly installed with an X-axis ball screw (26), the X-axis ball screw (26) and the Y-axis ball screw (18) are perpendicular to each other, the X-axis ball screw (26) is rotatably installed to the X-axis mounting plate (19) through an oil seal bearing structure (13), the X-axis ball screw (26) is drivingly installed with a drill pack mounting seat (27), and the row drill drill pack (7) is fixedly installed to the drill pack mounting seat (27); the X-axis mounting plate (19) is further fixedly installed with an X-axis balance rail (25), the X-axis balance rail (25) is parallel to the X-axis ball screw (26), and the drill pack mounting seat (27) is slidingly connected with the X-axis balance block and the X-axis balance rail (25).

7. The gantry drilling mechanism for numerical control gang drilling according to any one of claims 4-6, characterized in that, The oil seal bearing structure (13) comprises a rotary bearing (28) and oil seal rings (29) fixedly installed to both sides of the rotary bearing (28), the oil seal rings (29) block the gap between the inner ring and the outer ring of the rotary bearing (28), the gap between the inner ring and the outer ring of the rotary bearing (28) is slidingly installed with balls and filled with lubricating oil, and the X-axis ball screw (26), the Y-axis ball screw (18) or the Z-axis ball screw (12) is in interference fit through the inner ring of the rotary bearing (28) of the corresponding oil seal bearing structure (13).

8. The gantry drilling mechanism for numerical control gang drill according to claim 7, characterized in that, The oil seal ring (29) and the rotary bearing (28) are coaxially arranged, and the cross section of the oil seal ring (29) is in U shape, the opening of the U shape faces the opposite direction of the rotary bearing (28), and the bottom of the U shape is attached to the side surface of the rotary bearing (28) and blocks the gap between the inner ring and the outer ring of the rotary bearing (28).

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