Horizontal drilling mechanism for numerical control gang drill

Abstract

The utility model provides a horizontal drilling mechanism for a numerical control gang drill, which belongs to the field of wood-working machinery and comprises a driving component, the driving component comprises a driving motor, a driving seat and a ball screw, and the ball screw is rotatably mounted on the driving seat through an oil seal bearing structure. The oil seal bearing structure comprises a rotating bearing and oil seal rings fixedly installed on the two sides of the rotating bearing, the oil seal rings block a gap between an inner ring and an outer ring of the rotating bearing, balls are installed between the inner ring and the outer ring of the rotating bearing, and lubricating oil is filled between the inner ring and the outer ring of the rotating bearing. A sealing interface is constructed on the side face of the rotary bearing and is matched with an interference assembly mode, wood dust can be effectively prevented from invading a bearing cavity, meanwhile, the oil seal structure enables the lubricating oil filling amount of a gap between the inner ring and the outer ring of the bearing to be improved, and the maintenance frequency of the bearing can be reduced; and the continuous operation stability and the machining precision retentivity of the numerical control gang drill in a dust environment are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of woodworking machinery, especially relates to a horizontal drilling mechanism for numerical control gang drill. BACKGROUND

[0002] As the core equipment of plate furniture processing, numerical control gang drill realizes automatic drilling operation through computer numerical control system control multi-shaft drill bit. Typical system contains CAD / CAM programming module, servo drive unit and displacement feedback device, can convert design drawing into pulse signal instruction, accurately controls drill bit rotating speed (200-3000r / min adjustable), feed speed (5-15m / min) and three-dimensional motion trajectory.

[0003] However, in the woodworking workshop environment, the continuously generated wood dust (particle size is mostly concentrated in 10-500 mu m) is easy to invade the equipment transmission parts, especially the bearing part of the ball screw of the horizontal drilling mechanism. The mixture of dust and lubricating oil can form abrasive deposits, causing the screw transmission resistance to increase by 20%-40%, directly affecting the long-term maintainability of the initial positioning accuracy (±0.05mm) of the equipment, which has become the key bottleneck restricting the continuous operation ability of the equipment. SUMMARY

[0004] Based on the above problems existing in the prior art, the utility model provides a horizontal drilling mechanism for numerical control gang drill, including drive assembly, and horizontal drilling package installed to drive assembly and driven to move by drive assembly, the drive assembly includes drive motor, drive seat for fixedly installing corresponding drive motor and ball screw transmission connected to corresponding drive motor, the ball screw is rotatably installed to the drive seat through the oil seal bearing structure, the oil seal bearing structure includes rotary bearing and oil seal ring fixedly installed to both sides of the rotary bearing, the oil seal ring blocks the gap between the inner ring and the outer ring of the rotary bearing, and the ball is slidably installed between the inner ring and the outer ring of the rotary bearing and filled with lubricating oil.

[0005] Among them, 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-shaped is opposite to the rotary bearing, the bottom of the U-shaped is attached to the side surface of the rotary bearing and blocks the gap between the inner ring and the outer ring of the rotary bearing.

[0006] Among them, the drive assembly has three groups, which are X-axis drive assembly, Y-axis drive assembly and Z-axis drive assembly, the Y-axis drive assembly is installed to the Z-axis drive assembly and driven to move along the Z-axis direction by the Z-axis drive assembly, the X-axis drive assembly is installed to the Y-axis drive assembly and driven to move along the Y-axis direction by the Y-axis drive assembly, and the horizontal drilling package is installed to the X-axis drive assembly and driven to move along the X-axis direction by the X-axis drive assembly.

[0007] The Y-axis drive assembly includes a Y-axis drive seat fixedly connected with the support sleeve, the Y-axis drive seat is fixedly installed with a Y-axis drive motor, the Y-axis drive motor is drivingly installed with a Y-axis ball screw, the Y-axis ball screw is rotatably installed to the Y-axis drive seat through an oil seal bearing structure, and the Y-axis ball screw drives the X-axis drive assembly to move.

[0008] The Y-axis drive assembly includes a Y-axis drive seat fixedly connected with the support sleeve, the Y-axis drive seat is fixedly installed with a Y-axis drive motor, the Y-axis drive motor is drivingly installed with a Y-axis ball screw, the Y-axis ball screw is rotatably installed to the Y-axis drive seat through an oil seal bearing structure, and the Y-axis ball screw drives the X-axis drive assembly to move.

[0009] The Y-axis drive seat is further fixedly installed with a plurality of guide shafts parallel to the Z-axis ball screw, and the Z-axis drive seat is fixedly installed with guide sliding sleeves in one-to-one sliding fit with the guide shafts.

[0010] The X-axis drive assembly includes an X-axis drive seat drivingly connected with the Y-axis ball screw, the X-axis drive seat is fixedly installed with a Y-axis balance block in sliding fit with the Y-axis balance rail, the X-axis drive seat is fixedly installed with an X-axis drive motor, the X-axis drive motor is drivingly installed with 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 installed to the X-axis drive seat through an oil seal bearing structure, the X-axis ball screw is drivingly installed with a drill pack mounting seat, and the horizontal drill pack is fixedly installed to the drill pack mounting seat.

[0011] The utility model has the beneficial effects that: through the innovative design of the oil seal bearing structure, the oil seal ring and the rotating bearing are cooperated, the sealing interface is constructed on the side surface of the rotating bearing, and the interference assembly is matched, the wood chip dust can be effectively blocked from invading the bearing cavity, the filling amount of the lubricating oil between the inner and outer rings of the bearing is improved, the maintenance frequency of the bearing is reduced, and the continuous operation stability and the processing precision maintenance of the numerical control gang drill in the dust environment are obviously improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a three-dimensional structure schematic diagram of a horizontal drilling mechanism for a numerical control gang drill.

[0013] Figure 2 It is another angle three-dimensional structure schematic diagram of a horizontal drilling mechanism for a numerical control gang drill.

[0014] Figure 3 This is a three-dimensional structural diagram of a horizontal drilling mechanism for CNC multi-spindle drilling, which hides the Z-axis drive seat.

[0015] Figure 4 This is a schematic diagram of the connection between the drive motor and the ball screw.

[0016] Figure 5 This is an exploded structural diagram of the drive motor.

[0017] Figure 6 This is a three-dimensional structural diagram of an oil seal bearing.

[0018] Figure 7 This is a schematic diagram of the cross-sectional planar structure of an oil seal bearing. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] As attached Figures 1-7 The diagram illustrates a horizontal drilling mechanism for CNC multi-spindle drilling, comprising a drive assembly and a horizontal drill bit 1 mounted to and driven by the drive assembly. The drive assembly includes a drive motor, a drive seat for fixedly mounting the corresponding drive motor, and a ball screw connected to the corresponding drive motor. The ball screw is rotatably mounted to the drive seat via an oil seal bearing structure 2. The oil seal bearing structure 2 includes a rotary bearing 3 and oil seal rings 4 fixedly mounted on both sides of the rotary bearing 3. The oil seal rings 4 and the rotary bearing 3 are coaxially arranged, and the cross-section of the oil seal rings 4 is U-shaped. The opening of the U-shape faces the opposite direction of the rotary bearing 3, and the bottom of the U-shape fits against the side of the rotary bearing 3 and blocks the gap between the inner and outer rings of the rotary bearing 3. The length of the sidewall of the U-shape can be adjusted according to actual conditions to facilitate the fixed mounting of the oil seal bearing structure 2 to the drive seat. Balls filled with lubricating oil are slidably mounted between the inner and outer rings of the rotary bearing 3.

[0021] In a preferred embodiment, the drive assembly has three sets: an X-axis drive assembly 5, a Y-axis drive assembly 6, and a Z-axis drive assembly 7. The Y-axis drive assembly 6 is mounted on the Z-axis drive assembly 7 and is driven by the Z-axis drive assembly 7 to move along the Z-axis direction. The X-axis drive assembly 5 is mounted on the Y-axis drive assembly 6 and is driven by the Y-axis drive assembly 6 to move along the Y-axis direction. The horizontal drill bit 1 is mounted on the X-axis drive assembly 5 and is driven by the X-axis drive assembly 5 to move along the X-axis direction. The X-axis and Y-axis directions are both horizontal and perpendicular to each other, while the Z-axis direction is vertical.

[0022] The Z-axis drive assembly 7 comprises a Z-axis drive seat 8, the lower surface of the Z-axis drive seat 8 is fixedly installed with a Z-axis drive motor 9, the Z-axis drive motor 9 is drivingly installed with the screw rod part of a Z-axis ball screw 10 through a plum blossom shaft coupling, the screw rod part of the Z-axis ball screw 10 extends upward through the Z-axis drive seat 8 and is rotatably installed to the Z-axis drive seat 8 through an oil seal bearing structure 2, the sliding block of the Z-axis ball screw 10 is fixedly installed with a support sleeve 11 and moves the support sleeve 11 through the sliding block, the support sleeve 11 is slidingly connected with the Z-axis drive seat 8 through a sliding sleeve; the Y-axis drive assembly 6 comprises a Y-axis drive seat 13 fixedly connected with the lower surface and the support sleeve 11, the upper surface of the Y-axis drive seat 13 is fixedly installed with a Y-axis drive motor 14, the Y-axis drive motor 14 is also drivingly installed with the screw rod part of a Y-axis ball screw 15 through a plum blossom shaft coupling, the screw rod part of the Y-axis ball screw 15 is rotatably installed to the Y-axis drive seat 13 through an oil seal bearing structure 2, the sliding block of the Y-axis ball screw 15 is fixedly connected with the X-axis drive seat 16 of the X-axis drive assembly 5 and moves the X-axis drive assembly 5 through the sliding block, the upper surface of the Y-axis drive seat 13 is also fixedly installed with two Y-axis balance rails 17, the two Y-axis balance rails 17 are parallel to the Y-axis ball screw 15 and are symmetrically arranged on the two sides of the Y-axis ball screw 15, the X-axis drive assembly 5 and the Y-axis balance rails 17 are slidingly connected, the lower surface of the Y-axis drive seat 13 is also fixedly installed with four guide shafts 18, the four guide shafts 18 are divided into two groups, two guide shafts 18 form a group, the bottom ends of the two guide shafts 18 in the group are fixedly connected through a synchronous rod 19, the guide shaft 18 is parallel to the Z-axis ball screw 10, the Z-axis drive seat 8 is fixedly installed with a guide sliding sleeve 12 slidingly matched with the guide shaft 18 one by one; the X-axis drive assembly 5 comprises the X-axis drive seat 16 fixedly connected with the sliding block of the Y-axis ball screw 15, the lower surface of the X-axis drive seat 16 is fixedly installed with a Y-axis balance block slidingly matched with the Y-axis balance rail 17, the upper surface of the X-axis drive seat 16 is fixedly installed with an X-axis drive motor 20, the X-axis drive motor 20 is also drivingly installed with the screw rod part of an X-axis ball screw 21 through a plum blossom shaft coupling, the X-axis ball screw 21 and the Y-axis ball screw 15 are perpendicular to each other, the screw rod part of the X-axis ball screw 21 is rotatably installed to the X-axis drive seat 16 through an oil seal bearing structure 2, the sliding block of the X-axis ball screw 21 is fixedly installed with a drill pack mounting seat 22 and moves the drill pack mounting seat 22 through the sliding block, the horizontal drill pack 1 is fixedly installed to the drill pack mounting seat 22; the upper surface of the X-axis drive seat 16 is also fixedly installed with two X-axis balance rails 23, the two X-axis balance rails 23 are parallel to the X-axis ball screw 21 and are symmetrically arranged on the two sides of the X-axis ball screw 21, the drill pack mounting seat 22 is slidingly connected with the X-axis balance block and the X-axis balance rail 23.

[0023] The horizontal drilling mechanism provided by the embodiment drives the horizontal drilling bag 1 to move to a suitable position and perform drilling operation through cooperation of the X-axis driving assembly 5, the Y-axis driving assembly 6 and the Z-axis driving assembly 7, and through the innovative design of the oil seal bearing structure 2, the oil seal ring 4 and the rotating bearing 3 are cooperated to build a sealing interface on the side of the rotating bearing 3 and are matched with the interference assembly, so that the wood dust with a particle size of greater than or equal to 50 μm can be effectively blocked from invading the bearing cavity. After the dust concentration of 15 mg / m³ is tested under the working condition, the content of pollutants in the bearing cavity is reduced by 90% after 500 hours of continuous operation, meanwhile, the oil seal structure makes the filling amount of lubricating oil in the gap between the inner ring and the outer ring of the bearing increased by 40%, and the friction coefficient of the screw rod transmission is stably controlled in the interval of 0.003-0.005. The design also reduces the annual loss rate of lubricating oil to below 8%, prolongs the equipment maintenance interval from 200 hours of the traditional structure to 800 hours, and compresses the positioning accuracy attenuation rate to ±0.01 mm / 1000 hours, which significantly improves the continuous operation stability and machining precision retention of the numerical control gang drill in the dust environment.

[0024] The above embodiment only expresses one embodiment of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A horizontal drilling mechanism for numerical control gang drill, comprising a driving assembly, and a horizontal drilling package (1) mounted to the driving assembly and moved by the driving assembly, the driving assembly comprising a driving motor, a driving seat for fixedly mounting the corresponding driving motor, and a ball screw transmissionally connected to the corresponding driving motor, characterized in that, The ball screw is rotatably installed to the driving seat through the oil seal bearing structure (2), the oil seal bearing structure (2) comprises a rotating bearing (3) and oil seal rings (4) fixedly installed to both sides of the rotating bearing (3), the oil seal rings (4) block the gap between the inner ring and the outer ring of the rotating bearing (3), and the ball is slidably installed between the inner ring and the outer ring of the rotating bearing (3) and filled with lubricating oil.

2. The horizontal drilling mechanism for numerical control gang drill according to claim 1, characterized in that, The oil seal ring (4) and the rotating bearing (3) are coaxially arranged, and the cross section of the oil seal ring (4) is in a U shape, the opening of the U shape faces the opposite direction of the rotating bearing (3), and the bottom of the U shape is attached to the side surface of the rotating bearing (3) and blocks the gap between the inner ring and the outer ring of the rotating bearing (3).

3. The horizontal drilling mechanism for numerical control gang drill according to claim 1, characterized in that, The driving assembly has three groups, namely an X-axis driving assembly (5), a Y-axis driving assembly (6) and a Z-axis driving assembly (7), the Y-axis driving assembly (6) is installed to the Z-axis driving assembly (7) and driven by the Z-axis driving assembly (7) to move along the Z-axis direction, the X-axis driving assembly (5) is installed to the Y-axis driving assembly (6) and driven by the Y-axis driving assembly (6) to move along the Y-axis direction, and the horizontal drilling bag (1) is installed to the X-axis driving assembly (5) and driven by the X-axis driving assembly (5) to move along the X-axis direction.

4. The horizontal drilling mechanism for numerical control gang drill according to claim 3, characterized in that, The Z-axis driving assembly (7) comprises a Z-axis driving seat (8), the Z-axis driving seat (8) is fixedly installed with a Z-axis driving motor (9), the Z-axis driving motor (9) is drivingly installed with a Z-axis ball screw (10), the Z-axis ball screw (10) is rotatably installed to the Z-axis driving seat (8) through the oil seal bearing structure (2), and the Z-axis ball screw (10) is drivingly installed with a supporting sleeve (11), and the Y-axis driving assembly (6) and the supporting sleeve (11) are fixedly connected.

5. A horizontal drilling mechanism for a numerical control gang drill according to claim 4, wherein The Y-axis driving assembly (6) comprises a Y-axis driving seat (13) fixedly connected with the supporting sleeve (11), the Y-axis driving seat (13) is fixedly installed with a Y-axis driving motor (14), the Y-axis driving motor (14) is drivingly installed with a Y-axis ball screw (15), the Y-axis ball screw (15) is rotatably installed to the Y-axis driving seat (13) through the oil seal bearing structure (2), and the Y-axis ball screw (15) drives the X-axis driving assembly (5) to move; the Y-axis driving seat (13) is further fixedly installed with a Y-axis balance rail (17), the Y-axis balance rail (17) is parallel to the Y-axis ball screw (15), and the X-axis driving assembly (5) and the Y-axis balance rail (17) are slidably connected.

6. A horizontal drilling mechanism for a numerical control gang drill according to claim 5, wherein The Y-axis driving seat (13) is further fixedly installed with a plurality of guide shafts (18), the guide shafts (18) are parallel to the Z-axis ball screw (10), and the Z-axis driving seat (8) is fixedly installed with guide sliding sleeves (12) slidably matched with the guide shafts (18) in a one-to-one manner.

7. The horizontal drilling mechanism for numerical control drilling machine according to claim 5, wherein, The X-axis drive assembly (5) includes an X-axis drive seat (16) in transmission connection with a Y-axis ball screw (15), the X-axis drive seat (16) is fixedly installed with a Y-axis balance block in sliding fit with a Y-axis balance rail (17), the X-axis drive seat (16) is fixedly installed with an X-axis drive motor (20), the X-axis drive motor (20) is drivingly installed with an X-axis ball screw (21), the X-axis ball screw (21) and the Y-axis ball screw (15) are perpendicular to each other, the X-axis ball screw (21) is rotatably installed to the X-axis drive seat (16) through an oil seal bearing structure (2), the X-axis ball screw (21) is drivingly installed with a drill bag mounting seat (22) for movement, and the horizontal drill bag (1) is fixedly installed to the drill bag mounting seat (22); the X-axis drive seat (16) is further fixedly installed with an X-axis balance rail (23), the X-axis balance rail (23) is parallel to the X-axis ball screw (21), and the drill bag mounting seat (22) is slidingly connected with the X-axis balance block and the X-axis balance rail (23).

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