Z-axis moving mechanism of numerical control machine tool

Abstract

The utility model provides a numerical control machine tool's Z axle moving mechanism, including the bed and the stand, be provided with the sliding platform of along Y axle movement on the stand, the stand is fixed on the bed, the sliding platform is slid and is provided with the mounting panel, still include moving motor, moving motor is fixed on the sliding platform, the output shaft of moving motor is connected with the ball screw rod of along Z axle setting, the ball screw rod is equipped with the nut on, the nut is fixed on the mounting panel, moving motor drives the axial rotation of ball screw rod, the nut moves along the ball screw rod, the mounting panel is driven by the nut and moves relative to the sliding platform, and the mounting panel moves along Z axle direction. Compared with prior art, the Z axle direction's movement in this numerical control machine tool's Z axle moving mechanism is realized by the mounting panel on the sliding platform, and is not by the stand relative to the bed movement, thereby the size and weight of the bed are reduced, and the occupied space is reduced, and the stand is in the stationary state simultaneously, makes the whole structure more stable and reliable.

Description

Technical Field

[0001] This utility model belongs to the technical field of CNC machine tool equipment, and relates to the Z-axis movement mechanism of CNC machine tools. Background Technology

[0002] To enhance flexibility, current CNC machine tools often incorporate Z-axis movement. However, in existing CNC machine tools, Z-axis movement is typically achieved by the movement of a column relative to the bed. For example, patent number "202320640901.1," titled "A Dual-Spindle CNC Machine Tool," describes a bed with a column that moves along the Z-axis. However, this design results in a large bed size. The column's Z-axis movement requires sufficient length in that direction, further increasing the bed's size, weight, and floor space. Additionally, the column is usually quite tall, making it prone to tipping over during bed movement, potentially damaging the machine and causing structural instability. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the prior art by providing a Z-axis movement mechanism for a CNC machine tool in which movement in the Z-axis direction is achieved by a mounting plate on a slide.

[0004] The objective of this utility model can be achieved through the following technical solution: A Z-axis moving mechanism for a CNC machine tool includes a bed and a column. A slide table that moves along the Y-axis is provided on the column. The column is fixed to the bed. A mounting plate is slidably provided on the slide table. The mechanism also includes a moving motor, which is fixed to the slide table. The output shaft of the moving motor is connected to a ball screw that moves along the Z-axis. A nut is sleeved on the ball screw. The nut is fixed to the mounting plate. The moving motor drives the ball screw to rotate axially. The nut moves along the ball screw. The mounting plate is driven by the nut to move relative to the slide table, and the mounting plate moves along the Z-axis.

[0005] In the Z-axis moving mechanism of the CNC machine tool described above, the back and bottom surfaces of the mounting plate are provided with several slide rails, and several sliders are provided on the slide rails. The bottom of the slide table is bent so that the slide table is approximately L-shaped, and the sliders are fixed on the slide table.

[0006] In the Z-axis moving mechanism of the CNC machine tool described above, connecting blocks are sleeved at both ends of the ball screw, the nut is located between the two connecting blocks, the connecting blocks are fixed on the slide, the moving motor is installed at the end of the connecting block, a bearing is provided inside the connecting block, and the ball screw is hinged inside the connecting block through the bearing.

[0007] In the Z-axis movement mechanism of the CNC machine tool described above, two positioning rings are also provided inside the connecting block. The positioning rings are sleeved on the ball screw, and the two positioning rings are respectively located on both sides of the bearing. A positioning protrusion is formed inside the connecting block. Two first threaded sections are formed on the ball screw, and the two first threaded sections are respectively located on both sides of one of the connecting blocks. A first mounting nut is threaded onto each of the two first threaded sections. Tightening the two first mounting nuts will squeeze the two positioning rings respectively, so that the positioning rings are in close contact with the bearing, and the bearing is in close contact with the positioning protrusion.

[0008] In the Z-axis movement mechanism of the CNC machine tool described above, the ball screw is further provided with a second threaded section and a positioning step. The second threaded section and the positioning step are located on both sides of the other connecting block, respectively. A second mounting nut is threaded onto the second threaded section. The second mounting nut is tightened and squeezes one of its positioning rings, so that one of its positioning rings is in close contact with the bearing, the other positioning ring is in close contact with the positioning step, and the bearing is in close contact with the positioning protrusion.

[0009] Compared with existing technologies, the Z-axis movement mechanism of this CNC machine tool is achieved by the mounting plate on the slide table, rather than by the column moving relative to the bed. This reduces the size and weight of the bed and the space occupied. At the same time, the column is stationary, making the overall structure more stable and reliable. By setting the slide rail on the mounting plate, the length of the mounting plate is utilized more effectively. Compared with setting the slide rail on the slide table, the length requirement of the slide table is reduced, and the size and weight of the slide table are reduced, making the movement of the slide table on the column more stable and smooth. By setting the connecting block and positioning ring, the rotation of the ball screw is guided, reducing the wobble of the ball screw and making its rotation more stable. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the Z-axis movement mechanism of this CNC machine tool.

[0011] Figure 2 This is a cross-sectional schematic diagram of a portion of the Z-axis movement mechanism of this CNC machine tool.

[0012] Figure 3 yes Figure 2 A magnified structural diagram of point A in the middle.

[0013] Figure 4 This is a three-dimensional structural diagram of a portion of the Z-axis movement mechanism of this CNC machine tool.

[0014] In the diagram, 1 is the bed; 2 is the column; 3 is the slide table; 31 is the slider; 4 is the mounting plate; 41 is the slide rail; 7 is the moving motor; 71 is the ball screw; 711 is the first threaded section; 72 is the nut; 73 is the connecting block; 731 is the positioning protrusion; 74 is the bearing; 75 is the positioning ring; and 76 is the first mounting nut. Detailed Implementation

[0015] 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.

[0016] like Figure 1-4 As shown, the Z-axis movement mechanism of this CNC machine tool includes a bed 1, a column 2 fixed on the bed 1, a slide 3 that moves along the Y-axis on the column 2, and a mounting plate 4 slidably mounted on the slide 3. It also includes a moving motor 7, which is fixed on the slide 3. The output shaft of the moving motor 7 is connected to a ball screw 71 positioned along the Z-axis. A nut 72 is fitted onto the ball screw 71 and fixed to the back of the mounting plate 4. The moving motor 7 drives the ball screw 71 to rotate axially, causing the nut 72 to move along the ball screw 71. The mounting plate 4 is moved relative to the slide 3 by the nut 72, and moves along the Z-axis. In this invention, the movement in the Z-axis direction is achieved by the mounting plate 4 on the slide 3, reducing the size of the bed and the space occupied. Simultaneously, the column 2 remains stationary, resulting in a more stable and reliable overall structure.

[0017] In the above technical solution: The back and bottom surfaces of the mounting plate 4 are provided with several slide rails 41, and several sliders 31 are mounted on the slide rails 41. The bottom of the slide table 3 is bent, making it approximately L-shaped. The sliders 31 are fixed on the slide table 3, resulting in an L-shaped guide-sliding installation between the mounting plate 4 and the slide table 3. This provides a good guide-sliding connection and makes the sliding process of the mounting plate 4 more stable and reliable. Because the mounting plate 4 has a main shaft, it has a certain length. This invention sets the slide rails 41 on the mounting plate 4, making reasonable use of the length of the mounting plate 4. Compared with setting the slide rails 41 on the slide table 3, this reduces the length requirement of the slide table 3, reduces its size and weight, and makes the movement of the slide table 3 on the column 2 more stable and smooth.

[0018] In the above technical solution: Connecting blocks 73 are fitted at both ends of the ball screw 71, and the nut 72 is located between the two connecting blocks 73. The connecting blocks 73 are fixed on the slide table 3, and the moving motor 7 is installed at the end of the connecting blocks 73. Bearings 74 are provided inside the connecting blocks 73, and the ball screw 71 is hinged to the connecting blocks 73 through the bearings 74. The connecting blocks 73 connect the ball screw 71 to the slide table 3, making the rotation of the ball screw 71 more stable and less wobbly.

[0019] In the above technical solution: Two positioning rings 75 are also provided inside the connecting block 73. The positioning rings 75 are sleeved on the ball screw 71, and the two positioning rings 75 are located on both sides of the bearing 74. A positioning protrusion 731 is formed inside the connecting block 73. Two first threaded sections 711 are formed on the ball screw 71, and the two first threaded sections 711 are located on both sides of one of its connecting blocks 73. A first mounting nut 76 is threaded onto each of the two first threaded sections 711. Tightening the two first mounting nuts 76 presses against the two positioning rings 75, making the positioning rings 75 tightly against the bearing 74, and the bearing 74 tightly against the positioning protrusion 731, thus completing the positioning of the bearing 74 inside the connecting block 73. The ball screw 71 also has a second threaded section and a positioning step, which are located on both sides of another connecting block 73. A second mounting nut is threaded onto the second threaded section. Tightening the second mounting nut compresses one of its positioning rings 75, making one positioning ring 75 tightly attached to the bearing 74, the other positioning ring 75 tightly attached to the positioning step, and the bearing 74 tightly attached to the positioning protrusion 731, thus completing the positioning of the bearing 74 within the connecting block 73. The positioning rings 75 realize the positioning and installation of the bearing 74, and at the same time, the positioning rings 75 guide the rotation of the ball screw 71, reducing the wobble of the ball screw 71.

[0020] In the above technical solution: a milling spindle and a drilling spindle are provided on the mounting plate 4. The transmission method and structure of the milling spindle and drilling spindle on the mounting plate are the same as those of the milling spindle and drilling spindle in patent number "202320640901.1" entitled "A Dual-Main-Spindle CNC Machine Tool". A guide mechanism is also provided on the mounting plate 4. The structure of the guide mechanism is the same as that of the support frame in patent number "202320579907.2" entitled "A Guide Mechanism for a CNC Machine Tool".

[0021] In this CNC machine tool's Z-axis movement mechanism, movement in the Z-axis direction is achieved by the mounting plate 4 on the slide table 3, rather than by the column 2 moving relative to the bed 1. This reduces the size and weight of the bed and the space occupied. At the same time, the column 2 is stationary, making the overall structure more stable and reliable. By setting the slide rail 41 on the mounting plate 4, the length of the mounting plate 4 is utilized effectively. Compared with setting the slide rail 41 on the slide table 3, the length requirement of the slide table 3 is reduced, and the size and weight of the slide table 3 are reduced, making the movement of the slide table 3 on the column 2 more stable and smooth. By setting the connecting block 73 and the positioning ring 75, the rotation of the ball screw 71 is guided, reducing the wobbling of the ball screw 71 and making its rotation more stable.

[0022] 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.

[0023] Although this document frequently uses terms such as bed 1, column 2, slide table 3, slider 31, mounting plate 4, slide rail 41, moving motor 7, ball screw 71, first threaded section 711, nut 72, connecting block 73, positioning protrusion 731, bearing 74, positioning ring 75, and first mounting nut 76, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0024] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention 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 invention or exceeding the scope defined by the appended claims.

Claims

1. A Z-axis moving mechanism for a CNC machine tool, comprising a bed (1) and a column (2), wherein a slide (3) movable along the Y-axis is provided on the column (2), characterized in that... The column (2) is fixed on the bed (1). The slide (3) is slidably provided with a mounting plate (4). The slide (3) also includes a moving motor (7). The moving motor (7) is fixed on the slide (3). The output shaft of the moving motor (7) is connected to a ball screw (71) arranged along the Z-axis. A nut (72) is sleeved on the ball screw (71). The nut (72) is fixed on the mounting plate (4). The moving motor (7) drives the ball screw (71) to rotate axially. The nut (72) moves along the ball screw (71). The mounting plate (4) is driven by the nut (72) to move relative to the slide (3). The mounting plate (4) moves along the Z-axis.

2. The Z-axis moving mechanism of the CNC machine tool according to claim 1, characterized in that... The mounting plate (4) has several slide rails (41) on its back and bottom surfaces, and several sliders (31) are provided on the slide rails (41). The bottom of the slide table (3) is bent so that the slide table (3) is approximately L-shaped, and the sliders (31) are fixed on the slide table (3).

3. The Z-axis moving mechanism of the CNC machine tool according to claim 1, characterized in that... Both ends of the ball screw (71) are fitted with connecting blocks (73), the nut (72) is located between the two connecting blocks (73), the connecting blocks (73) are fixed on the slide (3), the moving motor (7) is installed at the end of the connecting block (73), the connecting block (73) is provided with a bearing (74), and the ball screw (71) is hinged in the connecting block (73) through the bearing (74).

4. The Z-axis moving mechanism of the CNC machine tool according to claim 3, characterized in that... The connecting block (73) is also provided with two positioning rings (75), which are sleeved on the ball screw (71). The two positioning rings (75) are located on both sides of the bearing (74). The connecting block (73) is provided with a positioning protrusion (731). The ball screw (71) is provided with two first thread sections (711). The two first thread sections (711) are located on both sides of one of the connecting blocks (73). The two first thread sections (711) are threaded with first mounting nuts (76). When the two first mounting nuts (76) are tightened, the two first mounting nuts (76) press the two positioning rings (75) respectively, so that the positioning rings (75) are in close contact with the bearing (74) and the bearing (74) is in close contact with the positioning protrusion (731). The ball screw (71) is also provided with a second threaded section and a positioning step. The second threaded section and the positioning step are located on both sides of the other connecting block (73). A second mounting nut is threaded onto the second threaded section. The second mounting nut is tightened and squeezes one of its positioning rings (75), so that one of its positioning rings (75) is in close contact with the bearing (74), the other positioning ring (75) is in close contact with the positioning step, and the bearing (74) is in close contact with the positioning protrusion (731).

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