Y-axis transmission structure of five-axis machining center

Abstract

The utility model belongs to the technical field of numerical control machine tools, and discloses a five-axis machining center Y-axis transmission structure which comprises a gantry machine body, a Y-axis lead screw and a Y-axis sliding block, the Y-axis lead screw is connected to the inner end of the gantry machine body, the Y-axis sliding block is located on the upper side of the Y-axis lead screw, the inner end of the Y-axis sliding block is connected with a lead screw sleeve used in cooperation with the Y-axis lead screw, one end of the Y-axis sliding block is connected with a positioning ring, and the other end of the Y-axis sliding block is connected with a nut. According to the scheme, by arranging an oil storage box, an oil coating cotton block and an oil coating structure synchronous with a sliding block, the functions of automatically supplying oil to a Y-axis lead screw from the outside of equipment and uniformly coating oil are achieved, and the problems that in a traditional structure, lubrication is difficult to control, and manual filling or a centralized oil supply system is relied on are solved; through the structural design that the oiling cotton block absorbs oil, becomes heavy and automatically presses and makes contact with the lead screw, and after oil is dried, the spring rebounds to make the oiling cotton block disengage from the lead screw, the abrasion risk of the oiling cotton block in the non-lubricating state is effectively reduced, the stability of the lubricating effect is improved, the service life of structural components is prolonged, the overall structure is simple, and the oiling device is suitable for application and popularization.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to the Y-axis transmission structure of a five-axis machining center. Background Technology

[0002] A five-axis machining center is a high-precision and high-efficiency CNC machining equipment that can perform machining operations on complex curved surfaces through the linkage of multiple coordinate axes. Among them, the Y-axis, as one of the main linear feed axes, is usually driven by a servo motor to rotate the lead screw, which drives the slider that cooperates with it to achieve linear movement along the guide rail, so as to complete the precise positioning of the workpiece or tool in the vertical direction.

[0003] In common structures, the Y-axis transmission mechanism often adopts a combination of ball screw and sliding block, which converts rotational motion into linear motion. This type of structure has the advantages of high transmission efficiency and high positioning accuracy, and is widely used in various five-axis machining equipment. In order to ensure transmission accuracy and service life, the screw and its sliding pair must be kept in good lubrication to avoid dry friction that leads to wear or a decrease in accuracy.

[0004] In the existing technology, lubrication of lead screws mainly relies on manual periodic oiling or on the dripping of lubricating oil onto the surface of the lead screw through a centralized lubrication system. However, the former relies on manual maintenance and it is difficult to ensure the continuity of the oil film; the latter has a complex structure, high cost, and the distribution of lubricating oil on the lead screw is difficult to control, which can easily lead to uneven lubrication or excessive accumulation. Utility Model Content

[0005] This utility model aims to provide a Y-axis transmission structure for a five-axis machining center to solve the problems mentioned in the background art. This solution achieves the function of automatically supplying oil to the Y-axis lead screw from outside the equipment and applying it evenly by setting up an oil storage box, oiling cotton block and slider synchronous oiling structure, avoiding the problems of difficult lubrication control and reliance on manual filling or centralized oil supply system in traditional structures. Through the structural design of the oiling cotton block absorbing oil and becoming heavy to automatically press down to contact the lead screw, and then rebounding with a spring to detach it from the lead screw after the oil dries, the wear risk of the oiling cotton block in the non-lubricated state is effectively reduced, the stability of the lubrication effect and the service life of structural components are improved, and the overall structure is simple and suitable for widespread application.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The Y-axis transmission structure of a five-axis machining center includes a gantry frame, a Y-axis lead screw, and a Y-axis slider. The Y-axis lead screw is connected to the inner end of the gantry frame. The Y-axis slider is located above the Y-axis lead screw, and the inner end of the Y-axis slider is connected to a lead screw sleeve that works with the Y-axis lead screw. One end of the Y-axis slider is connected to a positioning ring, which surrounds the Y-axis lead screw. An integrally formed mounting ring is formed at the top of the positioning ring. The inner cavities of the mounting ring and the positioning ring are interconnected. The inner end of the mounting ring is connected to a movable column, and an oil-coated cotton block is connected to the movable column. The outer end of the mounting ring is connected to a connecting block, and the end of the connecting block away from the mounting ring is connected to an oil storage box. A flow channel is opened inside the connecting block, and both ends of the flow channel are connected to the inner cavities of the mounting ring and the oil storage box, respectively. An oil delivery box is connected to the outer end of the gantry frame, and an oil delivery pipe is connected through the side wall of the gantry frame. One end of the oil delivery pipe is connected to the inner cavity of the oil storage box, and the other end of the oil delivery pipe extends to the top of the oil storage box.

[0008] Preferably, the movable column is configured as a hollow cylindrical structure, the oiled cotton block is disposed in the inner cavity of the movable column and matches the shape of the inner cavity of the movable column, and one end of the oiled cotton block near the inner cavity of the positioning ring extends to the outer side of the movable column.

[0009] Preferably, a slider is connected to the outer end of the movable column, a groove is provided on the inner wall of the mounting ring, the slider is slidably connected to the groove, a spring is provided in the groove, and the two ends of the spring are respectively connected to the inner wall of the slider and the groove.

[0010] Preferably, the oil pipe and the mounting ring are both located on the lower side of the upper surface of the Y-axis slider in the horizontal direction.

[0011] Preferably, the oil delivery pipe and the flow channel are both inclined to allow the liquid to flow from the inner cavity of the oil delivery box to the inner cavity of the oil storage box, and then from the inner cavity of the oil storage box to the inner cavity of the mounting ring.

[0012] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0013] This solution achieves automatic and uniform oil supply to the Y-axis lead screw from outside the equipment by setting up an oil storage box, oiling cotton block, and slider synchronous oiling structure. This avoids the problems of difficult lubrication control and reliance on manual filling or centralized oil supply systems in traditional structures. The structure design of the oiling cotton block automatically pressing down to contact the lead screw when it absorbs oil and then rebounding to detach from the lead screw after the oil dries effectively reduces the wear risk of the oiling cotton block in the non-lubricated state, improves the stability of the lubrication effect and the service life of structural components. The overall structure is simple and suitable for widespread application. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of a partially exploded structure provided by this utility model;

[0016] Figure 3 A schematic diagram of the oil delivery box and oil delivery pipe provided by this utility model;

[0017] Figure 4 This is a cross-sectional view of the positioning ring provided by this utility model.

[0018] Reference numerals in the attached diagram: 1. Gantry frame; 2. Y-axis lead screw; 3. Y-axis slider; 4. Lead screw sleeve; 5. Positioning ring; 6. Mounting ring; 7. Moving column; 8. Oil-coated cotton block; 9. Spring; 10. Oil accumulator box; 11. Connecting block; 12. Oil delivery box; 13. Oil delivery pipe. Detailed Implementation

[0019] A five-axis machining center is a high-precision and high-efficiency CNC machining equipment that can perform machining operations on complex curved surfaces through the linkage of multiple coordinate axes. Among them, the Y-axis, as one of the main linear feed axes, is usually driven by a servo motor to rotate the lead screw, which drives the slider that cooperates with it to achieve linear movement along the guide rail, so as to complete the precise positioning of the workpiece or tool in the vertical direction.

[0020] In common structures, the Y-axis transmission mechanism often adopts a combination of ball screw and sliding block, which converts rotational motion into linear motion. This type of structure has the advantages of high transmission efficiency and high positioning accuracy, and is widely used in various five-axis machining equipment. In order to ensure transmission accuracy and service life, the screw and its sliding pair must be kept in good lubrication to avoid dry friction that leads to wear or a decrease in accuracy.

[0021] In the existing technology, lubrication of lead screws mainly relies on manual periodic oiling or on the dripping of lubricating oil onto the surface of the lead screw through a centralized lubrication system. However, the former relies on manual maintenance and it is difficult to ensure the continuity of the oil film; the latter has a complex structure, high cost, and the distribution of lubricating oil on the lead screw is difficult to control, which can easily lead to uneven lubrication or excessive accumulation.

[0022] Therefore, this utility model proposes a Y-axis transmission structure that is simple in structure, stable in operation, capable of being oiled from outside the machine body, and achieving uniform lubrication of the lead screw through the movement of the slider. It can also automatically disengage in the oilless state, thereby improving the transmission stability and maintenance convenience of the five-axis machining center.

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

[0024] like Figure 1-4The Y-axis transmission structure of the five-axis machining center shown includes a gantry machine body 1, a Y-axis lead screw 2, and a Y-axis slider 3. The Y-axis lead screw 2 is connected to the inner end of the gantry machine body 1. The Y-axis slider 3 is located above the Y-axis lead screw 2, and the inner end of the Y-axis slider 3 is connected to a lead screw sleeve 4 that works with the Y-axis lead screw 2. One end of the Y-axis slider 3 is connected to a positioning ring 5, which surrounds the Y-axis lead screw 2. An integrally formed mounting ring 6 is formed at the top of the positioning ring 5. The inner cavities of the mounting ring 6 and the positioning ring 5 are interconnected. The inner end of the mounting ring 6 is connected to a movable column 7, and an oil-coated cotton block 8 is connected to the movable column 7. The outer end of the mounting ring 6 is connected to a connecting block 11. The end of the connecting block 11 away from the mounting ring 6 is connected to an oil storage box 10. The connecting block 11 has a flow channel inside, and the two ends of the flow channel are connected to the inner cavities of the mounting ring 6 and the oil storage box 10, respectively. The outer end of the gantry machine body 1 is connected to an oil delivery box 12. An oil supply pipe 13 is connected through the side wall of the body 1. One end of the oil supply pipe 13 is connected to the inner cavity of the oil storage box 10, and the other end of the oil supply pipe 13 extends to the top of the oil storage box 10. The movable column 7 is a hollow cylindrical structure. The oil-coated cotton block 8 is set in the inner cavity of the movable column 7 and matches the shape of the inner cavity of the movable column 7. The end of the oil-coated cotton block 8 near the inner cavity of the positioning ring 5 extends to the outside of the movable column 7. The outer end of the movable column 7 is connected to a slider. The inner wall of the mounting ring 6 is provided with a sliding groove. The slider is slidably connected to the sliding groove. A spring 9 is set in the sliding groove. The two ends of the spring 9 are respectively connected to the inner wall of the slider and the sliding groove. The oil supply pipe 13 and the mounting ring 6 are both located below the upper surface of the Y-axis slider 3 in the horizontal direction. The oil supply pipe 13 and the flow channel are both inclined to allow the liquid to flow from the inner cavity of the oil supply box 12 to the inner cavity of the oil storage box 10, and then from the inner cavity of the oil storage box 10 to the inner cavity of the mounting ring 6.

[0025] In this design, a drive motor is installed inside the gantry frame 1, and a slide rail is mounted at its top. The motor output is connected to the Y-axis lead screw 2, and the Y-axis slider 3 is connected to the device that needs to move along the Y-axis. The device is connected to the slide rail at the top of the gantry frame 1 via the slider. The motor drives the Y-axis lead screw 2 to rotate, and the device can then move along the slide rail via the Y-axis slider 3. In most existing technologies, the Y-axis lead screw 2 is typically enclosed inside the gantry frame 1, which makes the application of lubricating oil to the Y-axis lead screw 2... To address the difficulty of wiping, in this solution, when the device is reset, that is, when the Y-axis slider 3 is in the middle position of the Y-axis lead screw 2, the oil accumulator 10 is also located below the oil supply pipe 13. At this time, the user can directly inject oil into the oil supply box 12 from the outside of the gantry machine body 1. The lubricating oil can enter the oil accumulator 10 through the oil supply pipe 13, and then slowly drip into the mounting ring 6 through the connecting block 11, and be absorbed by the oiling cotton block 8. When the oiling cotton block 8 is not absorbing oil, its bottom end is not in contact with the Y-axis lead screw 2. Once the oiling cotton block 8 absorbs oil... As the weight increases, it compresses the spring 9, causing the movable column 7 to move downwards until the oiling cotton block 8 contacts the Y-axis lead screw 2. At this point, the user restarts the drive motor, moving the Y-axis slider 3. The oiling cotton block 8 then follows the movement of the Y-axis slider 3, applying lubricant to the surface of the rotating Y-axis lead screw 2. This achieves uniform oiling across the entire surface of the Y-axis lead screw 2, preventing lubricant concentration in certain areas. The narrow internal flow channel of the connecting block 11 ensures that lubricant is added slowly and continuously to the oiling cotton block 8, preventing the oiling cotton block 8 from being used excessively in a short time. Excessive absorption of lubricating oil within a short period can lead to overflow. After a period of lubrication, the lubricating oil in the oil accumulator 10 and the oiling cotton block 8 dries out. When the lubricating oil in the oiling cotton block 8 dries out, its weight decreases, and it resets upward under the elastic force of the spring 9, detaching from the surface of the Y-axis lead screw 2. This design ensures that the oiling cotton block 8 only contacts the Y-axis lead screw 2 during lubrication, reducing unnecessary contact between the oiling cotton block 8 and the Y-axis lead screw 2, effectively slowing down the wear rate of the oiling cotton block 8 and extending its service life.

[0026] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A Y-axis transmission structure for a five-axis machining center, characterized in that: The system includes a gantry frame (1), a Y-axis lead screw (2), and a Y-axis slider (3). The Y-axis lead screw (2) is connected to the inner end of the gantry frame (1). The Y-axis slider (3) is located above the Y-axis lead screw (2), and the inner end of the Y-axis slider (3) is connected to a lead screw sleeve (4) that works with the Y-axis lead screw (2). One end of the Y-axis slider (3) is connected to a positioning ring (5), which surrounds the Y-axis lead screw (2). The top of the positioning ring (5) is integrally formed with an installation ring (6). The inner cavities of the installation ring (6) and the positioning ring (5) are interconnected, and the inner end of the installation ring (6) is connected to a movable column (7). Oiled cotton block (8) is connected to the column (7). A connecting block (11) is connected to the outer end of the mounting ring (6). An oil storage box (10) is connected to the end of the connecting block (11) away from the mounting ring (6). A flow channel is opened inside the connecting block (11). The two ends of the flow channel are connected to the inner cavity of the mounting ring (6) and the oil storage box (10) respectively. An oil delivery box (12) is connected to the outer end of the gantry machine body (1). An oil delivery pipe (13) is connected through the side wall of the gantry machine body (1). One end of the oil delivery pipe (13) is connected to the inner cavity of the oil storage box (10), and the other end of the oil delivery pipe (13) extends to the top of the oil storage box (10).

2. The Y-axis transmission structure of the five-axis machining center as described in claim 1, characterized in that: The movable column (7) is configured as a hollow cylindrical structure. The oiled cotton block (8) is disposed in the inner cavity of the movable column (7) and matches the shape of the inner cavity of the movable column (7). The end of the oiled cotton block (8) near the inner cavity of the positioning ring (5) extends to the outside of the movable column (7).

3. The Y-axis transmission structure of the five-axis machining center as described in claim 1, characterized in that: The movable column (7) is connected to a slider at its outer end. The inner wall of the mounting ring (6) is provided with a groove. The slider is slidably connected to the groove. A spring (9) is provided in the groove. The two ends of the spring (9) are respectively connected to the inner wall of the slider and the groove.

4. The Y-axis transmission structure of the five-axis machining center as described in claim 1, characterized in that: The oil pipe (13) and the mounting ring (6) are both located on the lower side of the upper surface of the Y-axis slider (3) in the horizontal direction.

5. The Y-axis transmission structure of the five-axis machining center as described in claim 1, characterized in that: The oil delivery pipe (13) and the flow channel are both inclined to allow the liquid to flow from the inner cavity of the oil delivery box (12) to the inner cavity of the oil storage box (10), and then from the inner cavity of the oil storage box (10) to the inner cavity of the mounting ring (6).

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