Z-axis lead screw assembly structure of laser cutting machine head

Abstract

The utility model discloses a laser cutting machine head Z-axis lead screw assembly structure which comprises a machine frame, a motor base is arranged on one side of the machine frame, one end of an output shaft of a servo motor is connected with a Z-axis direction lead screw, one end of the Z-axis direction lead screw is connected with a bearing seat in a rotating mode, a nut base is further arranged on the Z-axis direction lead screw, and a nut is arranged on the nut base. A multi-stage buffer assembly is arranged on one side of the motor base and one side of the bearing base and comprises a base, the base is arranged on the surface of one side of the motor base and the surface of one side of the bearing base, a reset spring is arranged on the surface of one side of the base, one end of the reset spring is connected with a limiting base, and the limiting base is connected to a Z-axis direction lead screw in a sleeving mode. According to the laser cutting machine head limiting device, the height of the laser cutting machine head in the Z-axis direction can be accurately adjusted, the upper limit moving position and the lower limit moving position of a nut base can be limited, and the situation that the nut base exceeds the stroke is prevented.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting machine technology, and in particular to a structure of the Z-axis lead screw assembly of a laser cutting machine head. Background Technology

[0002] Laser cutting uses a focusing lens to focus a CO2 laser beam onto the surface of a material, melting it. Simultaneously, compressed gas, coaxial with the laser beam, blows away the molten material, causing the laser beam and material to move relative to each other along a specific trajectory, thus creating a cut of a certain shape. Laser cutting technology is widely used in the processing of both metallic and non-metallic materials, significantly reducing processing time, lowering costs, and improving workpiece quality. The laser cutting machine head consists of a nozzle, a focusing lens, and a focusing and tracking system. The laser cutting machine head is the execution terminal in the laser cutting machine, and it needs to be adjusted to the appropriate cutting height according to the height of the workpiece.

[0003] The laser cutting machine head in the current technology cannot accurately adjust the height in the Z-axis direction. At the same time, it cannot position and buffer the upper and lower limits of the Z-axis movement, which can easily cause overtravel and affect the accuracy of subsequent Z-axis movement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a Z-axis lead screw assembly structure for a laser cutting machine head, which solves the problem that the laser cutting machine head in the prior art cannot accurately adjust the height in the Z-axis direction, and at the same time, it cannot position and buffer the upper and lower limits of the Z-axis direction movement stroke, which easily causes the movement to exceed the stroke and affects the subsequent Z-axis direction movement accuracy.

[0005] To solve the above-mentioned technical problems, this utility model provides: a Z-axis lead screw assembly structure for a laser cutting machine head, including a frame, a motor base on one side of the frame, a servo motor on one side surface of the motor base, one end of the output shaft of the servo motor connected to a Z-axis lead screw, one end of the Z-axis lead screw rotatably connected to a bearing seat, the bearing seat being disposed on one side surface of the frame, and a lead screw nut seat also disposed on the Z-axis lead screw. A multi-stage buffer assembly for positioning one end of the lead screw nut seat is disposed on one side of both the motor base and the bearing seat. The multi-stage buffer assembly includes a base disposed on one side surface of the motor base and the bearing seat, a return spring disposed on one side surface of the base, one end of the return spring connected to a limit seat, the limit seat being sleeved on the Z-axis lead screw, wherein a buffer portion is further disposed between the base and the limit seat.

[0006] Preferably, one end of the Z-axis lead screw passes through the mounting port, the return spring, and the base, and is connected to the bearing seat. The mounting port is located in the middle of the limiting seat, which facilitates the connection between the Z-axis lead screw and the bearing seat.

[0007] Preferably, one end of the nut is connected to the laser cutting machine head, and the nut can be moved precisely in the Z-axis direction by rotating the lead screw in the Z-axis direction.

[0008] Preferably, guide rails are also provided on the frame on both sides of the wire nut seat, and sliders are provided on the guide rails. The sliders are connected to the laser cutting machine head, which improves the stability of the laser cutting machine head when it moves.

[0009] Preferably, the buffer part includes an upper connecting frame and a lower connecting frame. The upper connecting frame is disposed at the bottom of the limiting seat, and the lower connecting frame is disposed on one side surface of the base. An upper connecting rod rotates inside the upper connecting frame, and a lower connecting rod rotates inside the lower connecting frame. One end of the upper connecting rod is rotatably connected to one end of the lower connecting rod. When the limiting seat moves, it can simultaneously drive the upper connecting rod and the lower connecting rod to rotate.

[0010] Preferably, the upper connecting rod is rotatably connected to the upper connecting frame via an upper rotating shaft, and the lower connecting rod is rotatably connected to the lower connecting frame via a lower rotating shaft, thereby improving the stability of the upper and lower connecting rods during rotation.

[0011] Preferably, upper torsion springs are sleeved on both sides of the upper rotating shaft, and lower torsion springs are sleeved on both sides of the lower rotating shaft, which can absorb and buffer the pressure of the limiting seat.

[0012] Preferably, one end of the Z-axis lead screw is connected to the output shaft of the servo motor via a single diaphragm coupling, which improves the stability of the Z-axis lead screw during rotation.

[0013] The beneficial effects of this utility model are:

[0014] 1. This application enables the screw nut to move precisely in the Z-axis direction by rotating the screw in the Z-axis direction, thereby enabling precise adjustment of the height of the laser cutting machine head in the Z-axis direction.

[0015] 2. When the nut moves, this application can limit the upper and lower limits of the nut's movement, and can also provide multi-level buffering to prevent the nut from overtraveling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 for Figure 1 A partially enlarged structural diagram of section A in the middle;

[0018] Figure 3 This is a schematic diagram of the structure of the multi-level buffer assembly in this utility model;

[0019] Figure 4 This is a schematic diagram of the buffer section in this utility model;

[0020] In the diagram: 1. Servo motor, 2. Single diaphragm coupling, 3. Motor base, 4. Z-axis lead screw, 5. Guide, 6. Lead screw nut, 7. Bearing housing, 8. Multi-stage buffer assembly, 9. Frame, 81. Base, 82. Return spring, 83. Limit seat, 84. Buffer section, 85. Mounting port, 841. Upper connecting frame, 842. Upper torsion spring, 843. Upper rotating shaft, 844. Upper connecting rod, 845. Connecting shaft, 846. Lower connecting rod, 847. Lower connecting frame, 848. Lower rotating shaft, 849. Lower torsion spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All directional indicators (such as up, down, left, right, front, back, etc.) in the present utility model are only used to explain the relative positional relationship and movement of each component in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Please see Figure 1 A Z-axis lead screw assembly structure for a laser cutting machine head is disclosed. A motor base 3 is provided on one side of the frame 9, and a servo motor 1 is provided on one side surface of the motor base 3. One end of the output shaft of the servo motor 1 is connected to a Z-axis lead screw 4. One end of the Z-axis lead screw 4 is rotatably connected to a bearing seat 7, which is located on one side surface of the frame 9. A lead screw nut 6 is also provided on the Z-axis lead screw 4. One end of the lead screw nut 6 is connected to the laser cutting machine head. By rotating the Z-axis lead screw 4, the lead screw nut 6 can be driven to move precisely in the Z-axis direction.

[0023] Servo motor 1 is connected to the servo controller of the laser cutting machine. The servo controller controls the operation of servo motor 1. Servo motor 1 drives the Z-axis lead screw 4 to rotate. The lead screw nut 6 then moves linearly on the Z-axis lead screw 4. The lead screw nut 6 drives the laser cutting machine head to move along the Z-axis, thereby precisely adjusting the cutting height of the laser cutting machine head.

[0024] Furthermore, guide rails 5 are also provided on the frame 9 on both sides of the wire mother seat 6. A slider is provided on the guide rail 5. The slider is connected to the laser cutting machine head. When the laser cutting machine head moves, it drives the slider to move on the guide rail 5, which improves the stability of the laser cutting machine head when it moves.

[0025] Please see Figure 2 as well as Figure 3 Both the motor base 3 and the bearing base 7 are provided with a multi-stage buffer assembly 8 for positioning one end of the lead screw nut 6. The multi-stage buffer assembly 8 includes a base 81, which is provided on one side of the motor base 3 and the bearing base 7. A return spring 82 is provided on one side of the base 81. One end of the return spring 82 is connected to a limit seat 83. The limit seat 83 is sleeved on the lead screw 4 in the Z-axis direction. A buffer part 84 is also provided between the base 81 and the limit seat 83.

[0026] When the lead screw nut 6 moves longitudinally, it contacts the limit seat 83 on one side of the bearing seat 7 or the motor seat 3. The limit seat 83 moves along the Z-axis direction of the lead screw 4. At the same time, the limit seat 83 compresses the return spring 82. The limit seat 83 limits the upper or lower movement position of the lead screw nut 6 and can absorb the pressure of the lead screw nut 6.

[0027] Please see Figure 3 as well as Figure 4 The buffer section 84 includes an upper connecting frame 841 and a lower connecting frame 847. The upper connecting frame 841 is located at the bottom of the limiting seat 83, and the lower connecting frame 847 is located on one side surface of the base 81. An upper connecting rod 844 rotates inside the upper connecting frame 841, and a lower connecting rod 846 rotates inside the lower connecting frame 847. One end of the upper connecting rod 844 is rotatably connected to one end of the lower connecting rod 846. When the limiting seat 83 moves, it can simultaneously drive the upper connecting rod 844 and the lower connecting rod 846 to rotate. The upper connecting rod 844 is rotatably connected to the upper connecting frame 841 through an upper rotating shaft 843, and the lower connecting rod 846 is rotatably connected to the lower connecting frame 847 through a lower rotating shaft 848, thereby improving the stability of the upper connecting rod 844 and the lower connecting rod 846 when rotating. Upper torsion springs 842 are sleeved on both sides of the upper rotating shaft 843, and lower torsion springs 849 are sleeved on both sides of the lower rotating shaft 848, which can absorb and buffer the pressure of the limiting seat 83.

[0028] When the limiting seat 83 moves, the limiting seat 83 drives the upper connecting rod 844 and the lower connecting rod 846 to rotate within the upper connecting frame and the lower connecting frame 847. One end of the upper connecting rod 844 and the lower connecting rod 846 also rotates through the connecting shaft 845. The upper connecting rod 844 drives the upper rotating shaft 843 to rotate, and the lower connecting rod 846 drives the lower rotating shaft 848 to rotate. The upper rotating shaft 843 drives the upper torsion spring 842 to rotate, and the lower rotating shaft 848 drives the lower torsion spring 849 to rotate, thereby absorbing the pressure on the nut seat 6 in multiple stages and buffering the nut seat 6.

[0029] Furthermore, one end of the Z-axis lead screw 4 passes through the mounting port 85, the return spring 82, and the base 81, and is connected to the bearing seat 7. The mounting port 85 is located in the middle of the limit seat 83, which facilitates the connection between the Z-axis lead screw 4 and the bearing seat 7.

[0030] Furthermore, one end of the Z-axis lead screw 4 is connected to the output shaft of the servo motor 1 through a single diaphragm coupling 2, which improves the stability of the Z-axis lead screw 4 during rotation.

[0031] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser cutting machine head Z-axis screw rod assembly structure, characterized in that: The application relates to a multi-stage buffer assembly for a laser cutting machine, which comprises a rack (9), a motor base (3) arranged on one side of the rack (9), a servo motor (1) arranged on one side surface of the motor base (3), a Z-axis direction screw rod (4) connected to one end of an output shaft of the servo motor (1), a bearing base (7) rotatably connected to one end of the Z-axis direction screw rod (4) and arranged on one side surface of the rack (9), and a nut base (6) arranged on the Z-axis direction screw rod (4), wherein the motor base (3) and the bearing base (7) are provided with multi-stage buffer assemblies (8) for positioning one end of the nut base (6), the multi-stage buffer assembly (8) comprises a base (81) arranged on one side surface of the motor base (3) and the bearing base (7), a reset spring (82) arranged on one side surface of the base (81), and a limiting base (83) connected to one end of the reset spring (82) and sleeved on the Z-axis direction screw rod (4), and a buffer part (84) is further arranged between the base (81) and the limiting base (83).

2. The laser cutting machine head Z-axis screw rod assembly structure according to claim 1, characterized in that: One end of the Z-axis direction screw rod (4) penetrates through a mounting hole (85), the reset spring (82) and the base (81), and is connected to the bearing base (7), and the mounting hole (85) is arranged in the middle of the limiting base (83).

3. The laser cutting machine head Z-axis screw rod assembly structure according to claim 1, characterized in that: One end of the nut base (6) is connected to a laser cutting machine head.

4. The laser cutting machine head Z-axis screw rod assembly structure according to claim 3, characterized in that: Guide rails (5) are further arranged on the rack (9) on both sides of the nut base (6), and a sliding block is arranged on the guide rail (5) and connected to the laser cutting machine head.

5. The laser cutting machine head Z-axis screw rod assembly structure according to claim 1, characterized in that: The buffer part (84) comprises an upper connecting frame (841) arranged at the bottom of the limiting base (83) and a lower connecting frame (847) arranged on one side surface of the base (81), an upper connecting rod (844) is rotatably arranged in the upper connecting frame (841), and a lower connecting rod (846) is rotatably arranged in the lower connecting frame (847), and one end of the upper connecting rod (844) is rotatably connected to one end of the lower connecting rod (846).

6. The laser cutting machine head Z-axis screw rod assembly structure according to claim 5, characterized in that: The upper connecting rod (844) is rotatably connected to the upper connecting frame (841) through an upper rotating shaft (843), and the lower connecting rod (846) is rotatably connected to the lower connecting frame (847) through a lower rotating shaft (848).

7. The laser cutting machine head Z-axis screw rod assembly structure according to claim 6, characterized in that: Upper torsional springs (842) are sleeved on both sides of the upper rotating shaft (843), and lower torsional springs (849) are sleeved on both sides of the lower rotating shaft (848).

8. The laser cutting machine head Z-axis screw rod assembly structure according to any one of claims 1-7, characterized in that: One end of the Z-axis direction screw rod (4) is connected to the output shaft of the servo motor (1) through a single diaphragm coupling (2).

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