Z-axis transmission structure of turning and milling machine tool

Abstract

The invention discloses a turning and milling machine tool Z-axis transmission structure, and relates to the technical field of turning and milling machine tools, the turning and milling machine tool Z-axis transmission structure comprises a Z-axis fixing seat, and a strip-shaped limiting frame, an adjusting frame and an extension plate which are arranged at the front end of the Z-axis fixing seat, and further comprises a Z-axis positioning mechanism which is fixedly arranged on the inner side of the adjusting frame and is used for adjusting and positioning a cutter in the Z-axis direction; and the driving conversion mechanism is fixedly arranged on the surface of the extension plate. A driving conversion mechanism and a cooling mechanism are arranged on the Z-axis surface of the turn-milling machine tool, an electric telescopic rod can be used for driving a U-shaped frame to move along an arc path, so that the position of a linkage gear is converted and adjusted, when the linkage gear is in meshing transmission with a first gear, a driving motor can be used for driving the linkage gear to rotate, and the cooling efficiency is improved. And then the first gear and the cutter mounting seat are driven to rotate, so that the cutter is driven to machine the workpiece.

Description

Technical Field

[0001] This invention relates to the field of milling and turning machine tool technology, specifically to the Z-axis transmission structure of a milling and turning machine tool. Background Technology

[0002] In the field of milling and turning machine tools, the Z-axis transmission structure is a core component that determines machining accuracy, efficiency and equipment stability. Its performance directly affects the workpiece machining quality and tool life.

[0003] The existing Z-axis transmission structure of milling and turning machines has the following problems: tool rotation and Z-axis position adjustment usually require independent drive components, resulting in complex structure, cumbersome power switching process, and affecting overall machining efficiency. In addition, if the heat generated during machining cannot be dissipated in time, it will lead to accelerated tool wear. However, the cooling system of existing transmission structures is mostly independently set up, requiring additional drive devices, which not only increases energy consumption but also makes it difficult to achieve efficient cooling.

[0004] To address this, we propose a Z-axis transmission structure for milling and turning machines to overcome the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a Z-axis transmission structure for milling and turning machines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a Z-axis transmission structure for a milling and turning machine tool, including a Z-axis fixed seat, a strip-shaped limiting frame, an adjusting frame, and an extension plate disposed at its front end, and further comprising: The Z-axis positioning mechanism is fixedly installed inside the adjustment frame and is used to adjust and position the tool in the Z-axis direction. A drive conversion mechanism is fixedly mounted on the surface of the extension plate and is used to switch the power between the tool and the Z-axis positioning mechanism. A cooling mechanism is fixedly mounted on the surface of the strip-shaped limiting frame and is used to cool and lower the temperature of the workpiece surface.

[0007] Preferably, the Z-axis positioning mechanism includes an adjusting screw, which is rotatably connected between the inner bottom wall and the inner bottom wall of the adjusting frame. A lifting block is threadedly connected to the surface of the adjusting screw. The left and right ends of the lifting block are fixedly connected to the left and right inner side walls of the strip-shaped limiting frame, respectively. The telescopic end of the electric telescopic rod is rotatably connected to the surface of the U-shaped frame. A support shaft is fixedly connected to the upper surface of the U-shaped frame. The top end of the support shaft is rotatably connected to the lower surface of the extension plate. A drive motor is fixedly installed on the surface of the U-shaped frame. The rotating shaft of the drive motor is fixedly connected to the center of the linkage gear.

[0008] Preferably, the drive conversion mechanism includes a rotating shaft rotatably mounted on the upper surface of the extension plate, and an electric telescopic rod and a U-shaped frame rotatably mounted on the lower surface of the extension plate. The bottom end of the rotating shaft extends to the bottom of the extension plate and is fixedly connected to a tool mounting seat. A linkage gear is rotatably connected to the inner side of the U-shaped frame. A first gear is fixedly connected to the surface of the rotating shaft, and the position of the first gear corresponds to the linkage gear. A linkage shaft is rotatably mounted on the lower surface of the extension plate, and a second gear is fixedly connected to the surface of the linkage shaft. The second gear and the first gear are distributed on both sides of the linkage gear, and the first gear, the second gear, and the linkage gear are all located on the same horizontal plane.

[0009] Preferably, the linkage shaft is located directly below the adjusting screw, and the top end of the linkage shaft extends into the interior of the adjusting frame and is fixedly connected to the bottom end of the adjusting screw. The left and right sides of the adjusting frame are provided with strip-shaped guide holes, the width of which matches the lifting block, and the lifting block is slidably connected to the inner wall of the strip-shaped guide hole.

[0010] Preferably, the cooling mechanism includes a coolant reservoir fixedly connected to the back of the strip-shaped limiting frame, and a drive shaft rotatably mounted on the lower surface of the extension plate. A drive gear is fixedly connected to the end of the drive shaft, the position of the drive gear corresponds to the first gear, and the drive gear meshes with the first gear. A drive synchronous pulley is fixedly connected to the surface of the drive shaft. A fixing plate is fixedly connected to the side of the adjusting frame. A mounting hole is opened on the surface of the fixing plate, and an air inlet shell is fixedly embedded in the inner wall of the mounting hole. A driven rod is rotatably connected to the lower surface of the air inlet shell, and a driven synchronous pulley is fixedly attached to the bottom end of the driven rod. A drive belt is installed between the drive synchronous pulley and the driven synchronous pulley.

[0011] Preferably, the top of the driven rod extends into the interior of the air inlet housing, and a guide impeller is fixedly installed on the surface of the driven rod. A conical guide shroud is fixedly installed on the upper surface of the fixed plate. The position of the conical guide shroud corresponds to the air inlet housing, and the air inlet of the conical guide shroud corresponds to the air outlet of the guide impeller. A plurality of air inlet holes are opened on the lower surface of the air inlet housing. A dust filter is fixedly connected to the inner wall of the air inlet holes. The position of the air inlet holes corresponds to the air inlet end of the guide impeller. A flexible air guide tube is fixedly connected to the output end of the conical guide shroud.

[0012] Preferably, a cooling nozzle is fixedly embedded on the surface of the fixing plate, the output end of the cooling nozzle corresponds to the position of the tool mounting seat, and the cooling nozzle is made of metal corrugated pipe. A liquid supply hose is fixedly connected to the input end of the cooling nozzle, and a drain pipe is fixedly embedded at the bottom end of the cutting fluid tank. The end of the liquid supply hose away from the cooling nozzle is fixedly connected to the output end of the drain pipe, and a one-way drain valve is fixedly provided on the surface of the drain pipe.

[0013] Preferably, a filling pipe is fixedly embedded at the top of the cutting fluid tank, a sealing cap is threaded to the end of the filling pipe, an air inlet pipe is fixedly embedded on the surface of the cutting fluid tank, the output end of the air guide hose is fixedly connected to the air inlet end of the air inlet pipe, and a one-way air inlet valve is fixedly installed on the surface of the air inlet pipe.

[0014] Preferably, a protective cover is fixedly provided on the lower surface of the extension plate, and the position of the protective cover corresponds to the drive conversion mechanism.

[0015] Preferably, the Z-axis mounting base has bolt fixing holes on its surface, and the Z-axis mounting base is fixedly connected to the Y-axis slider of the machine tool through bolts and bolt fixing holes.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) By setting a drive conversion mechanism and a cooling mechanism on the Z-axis surface of the milling machine tool, the electric telescopic rod can be used to drive the U-shaped frame to move in an arc path, thereby converting and adjusting the position of the linkage gear. When the linkage gear meshes with the first gear, the drive motor can be used to drive the linkage gear to rotate, thereby driving the first gear and the tool mounting seat to rotate, thereby driving the tool to perform machining operations on the workpiece. When it is necessary to adjust the vertical position of the tool on the Z-axis, the electric telescopic rod can be used to drive the linkage gear to mesh with the second gear, while disengaging from the first gear. Thus, when the tool stops rotating, the adjusting screw is driven to rotate synchronously, and the adjusting screw is used to drive the tool to adjust its position. The same drive source can take into account both tool rotation machining and Z-axis lifting adjustment, reducing additional power components, simplifying the structure and shortening the action switching time.

[0017] (2) By setting up a cooling mechanism, the drive motor drives the linkage gear to rotate at the same time, and drives the transmission gear to rotate. Then, the transmission gear and the transmission shaft drive the drive synchronous pulley to rotate, and the transmission belt drives the driven synchronous pulley to rotate. This drives the guide impeller to rotate at high speed inside the air intake shell. The gas generated by the guide impeller is input into the cutting tank. The pressure generated by the gas is used to input the cutting fluid in the cutting fluid tank into the cooling spray pipe. The cutting fluid is sprayed onto the workpiece machining area by the cooling spray pipe. The combination of cutting fluid spray and airflow-assisted cooling is used to accurately act on the tool mounting seat and machining area and quickly remove heat. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the present invention; Figure 3 This is a partial side view of the structure of the present invention; Figure 4This is a schematic diagram of the internal structure of the protective cover of the present invention; Figure 5 This is a partial side sectional view of the extension plate of the present invention; Figure 6 This is a schematic diagram of the bottom view structure of the drive conversion mechanism of the present invention; Figure 7 for Figure 4 Enlarged structural diagram at point A; Figure 8 for Figure 5 A magnified structural diagram at point B in the middle.

[0019] In the diagram: 1. Z-axis mounting base; 2. Strip-shaped limit bracket; 3. Adjustment frame; 4. Extension plate; 5. Z-axis positioning mechanism; 6. Drive conversion mechanism; 7. Cooling mechanism; 8. Tool mounting base; 9. Protective cover; 501. Adjusting screw; 502. Lifting block; 503. Strip guide hole; 601. Rotating shaft; 602. Electric telescopic rod; 603. U-shaped frame; 605. Linkage gear; 606. Support shaft; 607. Drive motor; 608. First gear; 609. Linkage shaft; 610. Second gear; 701. Drive shaft; 702. Drive gear; 703. Drive synchronous pulley; 704. Fixed plate; 705. Air inlet housing; 706. Driven rod; 707. Air guide impeller; 708. Conical air guide shroud; 709. Dust filter; 710. Air guide hose; 711. Cooling nozzle; 712. Liquid supply hose; 713. Drain pipe; 714. One-way drain valve; 715. Liquid filling pipe; 716. Air inlet pipe; 717. Cutting fluid tank; 718. Driven synchronous pulley; 719. Drive belt. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-8 The present invention provides a technical solution: a Z-axis transmission structure for a milling and turning machine tool, including a Z-axis fixed seat 1, the surface of which is provided with bolt fixing holes, and is fixedly connected to the Y-axis slider of the machine tool by bolts, so as to ensure that the structure maintains a stable position during the operation of the machine tool.

[0022] See Figures 2 to 6A strip-shaped limiting frame 2 is fixedly connected to the front end of the Z-axis fixed base 1. The strip-shaped limiting frame 2 is elongated and provides a sliding guide for the adjusting frame 3. The adjusting frame 3 is slidably disposed on the inner wall of the strip-shaped limiting frame 2. The bottom end of the adjusting frame 3 is fixedly connected to the extension plate 4.

[0023] The inner side of the adjustment frame 3 is provided with a Z-axis positioning mechanism 5, which is used to achieve precise positioning of the adjustment frame 3 along the Z-axis direction; the surface of the extension plate 4 is provided with a drive conversion mechanism 6, which undertakes the power transmission and conversion functions and controls the rotation and position adjustment of the tool; the surface of the strip limit frame 2 is equipped with a cooling mechanism 7, and the lower surface of the extension plate 4 is fixedly provided with a protective cover 9. The position of the protective cover 9 corresponds to the drive conversion mechanism 6, and it encloses the drive conversion mechanism 6 to play the role of dust prevention, chip prevention and protection of transmission components.

[0024] See Figures 3 to 7 The Z-axis positioning mechanism 5 includes an adjusting screw 501, which is rotatably connected between the inner bottom wall and the inner top wall of the adjusting frame 3. The surface of the adjusting screw 501 is threaded with a lifting block 502, and its left and right ends are respectively fixedly connected to the left and right inner side walls of the strip-shaped limiting frame 2.

[0025] The adjusting frame 3 has strip-shaped guide holes 503 on both its left and right sides. The length of the strip-shaped guide holes 503 is parallel to the axis of the adjusting screw 501, and the width of the strip-shaped guide holes 503 matches the lifting block 502. The lifting block 502 is slidably connected to the inner wall of the strip-shaped guide holes 503. When the adjusting screw 501 rotates, since the lifting block 502 is fixed, the adjusting screw 501 will move axially relative to the lifting block 502, thereby causing the adjusting frame 3 to slide along the inner wall of the strip-shaped limiting frame 2. At the same time, the strip-shaped guide holes 503 slide along the lifting block 502, playing a guiding and limiting role.

[0026] See Figures 5 to 7 The drive conversion mechanism 6 includes a rotating shaft 601, which is rotatably mounted on the upper surface of the extension plate 4. The bottom end of the rotating shaft 601 extends through the extension plate 4 to the bottom of the extension plate 4 and is fixedly connected to the tool mounting seat 8. The tool mounting seat 8 is used to mount the machining tool. The rotation of the rotating shaft 601 will directly drive the tool mounting seat 8 and the tool to rotate synchronously, thereby realizing the cutting operation.

[0027] See Figures 6 to 7Both the electric telescopic rod 602 and the U-shaped frame 603 are rotatably mounted on the lower surface of the extension plate 4. The fixed end of the electric telescopic rod 602 is rotatably connected to the mounting seat on the lower surface of the extension plate 4, and its telescopic end is rotatably connected to the surface of the U-shaped frame 603. Through the telescopic movement of the electric telescopic rod 602, the U-shaped frame 603 can be driven to rotate around the support shaft 606. The support shaft 606 is fixedly connected to the upper surface of the U-shaped frame 603. The top end of the support shaft 606 is rotatably connected to the lower surface of the extension plate 4. The support shaft 606 provides a rotation fulcrum for the U-shaped frame 603, ensuring that the U-shaped frame 603 can move stably along an arc-shaped path under the drive of the electric telescopic rod 602.

[0028] A linkage gear 605 is rotatably connected to the inner side of the U-shaped frame 603. The center of the linkage gear 605 is fixedly connected to the rotating shaft of the drive motor 607. The drive motor 607 is fixedly mounted on the surface of the U-shaped frame 603. When the drive motor 607 is running, it can directly drive the linkage gear 605 to rotate. A first gear 608 is fixedly connected to the surface of the rotating shaft 601. The first gear 608 is located below the extension plate 4, and its position corresponds to that of the linkage gear 605, ensuring that the linkage gear 605 can accurately mesh with the first gear 608 during movement.

[0029] See Figures 5 to 7 The lower surface of the extension plate 4 is also rotatably provided with a linkage shaft 609. The axis of the linkage shaft 609 is parallel to the axis of the rotating shaft 601. A second gear 610 is fixedly connected to its surface. The second gear 610 and the first gear 608 are distributed on both sides of the linkage gear 605. The first gear 608, the second gear 610 and the linkage gear 605 are all located on the same horizontal plane, ensuring that the linkage gear 605 can smoothly switch between the two states of meshing with the first gear 608 and meshing with the second gear 610 under the drive of the electric telescopic rod 602.

[0030] The linkage shaft 609 is located directly below the adjusting screw 501. Its top end extends into the interior of the adjusting frame 3 and is fixedly connected to the bottom end of the adjusting screw 501, so that the rotation of the linkage shaft 609 can be directly transmitted to the adjusting screw 501, causing the adjusting screw 501 to rotate synchronously, thereby realizing the transmission of power from the drive conversion mechanism 6 to the Z-axis positioning mechanism 5.

[0031] See Figures 3 to 8 The cooling mechanism 7 includes a cutting fluid tank 717, which is fixedly connected to the back of the strip-shaped limiting frame 2 for storing cutting fluid. A filling pipe 715 is fixedly embedded at the top of the cutting fluid tank 717, and a sealing cap is threaded to the end of the filling pipe 715. The sealing cap can be opened to add cutting fluid to the cutting fluid tank 717 through the filling pipe 715. The sealing cap ensures the airtightness of the cutting fluid tank 717 and prevents cutting fluid leakage or impurities from entering.

[0032] See Figure 3 An air inlet pipe 716 is fixedly embedded in the surface of the cutting fluid reservoir 717. The air inlet pipe 716 is used to introduce gas into the cutting fluid reservoir 717. A one-way air inlet valve is fixedly installed on its surface to ensure that gas can only enter the cutting fluid reservoir 717 through the air inlet pipe 716 and will not flow back. A drain pipe 713 is fixedly embedded in the bottom end of the cutting fluid reservoir 717. The drain pipe 713 is used to discharge cutting fluid. A one-way drain valve 714 is fixedly installed on its surface to ensure that cutting fluid can only flow out from the drain pipe 713 and to prevent external impurities or air from entering the cutting fluid reservoir 717 through the drain pipe 713.

[0033] See Figures 5 to 8 The transmission shaft 701 is rotatably mounted on the lower surface of the extension plate 4, with its axis perpendicular to the axis of the rotating shaft 601. A transmission gear 702 is fixedly connected to the end of the transmission shaft 701. The position of the transmission gear 702 corresponds to that of the first gear 608, and the transmission gear 702 meshes with the first gear 608, so that when the first gear 608 rotates, it can drive the transmission gear 702 to rotate synchronously, thereby driving the transmission shaft 701 to rotate. A drive synchronous pulley 703 is fixedly connected to the surface of the transmission shaft 701.

[0034] A fixing plate 704 is fixedly connected to the side of the adjusting frame 3. The fixing plate 704 is perpendicular to the side of the adjusting frame 3. The surface of the fixing plate 704 has a mounting hole. An air inlet shell 705 is fixedly embedded in the inner wall of the mounting hole. The air inlet shell 705 has a cylindrical structure. A driven rod 706 is rotatably connected to its lower surface. A driven synchronous wheel 718 is fixed to the bottom end of the driven rod 706. A transmission belt 719 is installed between the driving synchronous wheel 703 and the driven synchronous wheel 718. Through the transmission action of the transmission belt 719, the rotation of the driving synchronous wheel 703 can drive the driven synchronous wheel 718 and the driven rod 706 to rotate synchronously.

[0035] The driven rod 706 extends from its top end into the interior of the air inlet housing 705, and a guide impeller 707 is fixedly mounted on the surface of the driven rod 706. The guide impeller 707 is located inside the air inlet housing 705, with a gap between it and the inner wall of the air inlet housing 705 to ensure that the guide impeller 707 can rotate freely. Several air inlet holes are opened on the lower surface of the air inlet housing 705, and the air inlet holes are evenly distributed on the lower surface of the air inlet housing 705. A dust filter 709 is fixedly connected to the inner wall of the air inlet holes to filter dust and impurities in the air and prevent them from entering the cooling system and affecting the operation of the components. The position of the air inlet holes corresponds to the air inlet end of the guide impeller 707 to ensure that air can be drawn in through the air inlet holes when the guide impeller 707 rotates.

[0036] See Figures 5 to 8A conical air guide shroud 708 is fixedly installed on the upper surface of the fixed plate 704. The position of the conical air guide shroud 708 corresponds to that of the air inlet shell 705, and the air inlet of the conical air guide shroud 708 corresponds to the air outlet of the air guide impeller 707. The airflow generated by the rotation of the air guide impeller 707 can directly enter the conical air guide shroud 708. An air guide hose 710 is fixedly connected to the output end of the conical air guide shroud 708, and the other end of the air guide hose 710 is fixedly connected to the air inlet end of the air inlet pipe 716, so as to deliver the airflow guided by the conical air guide shroud 708 to the inside of the cutting fluid tank 717.

[0037] A cooling nozzle 711 is also fixedly embedded on the surface of the fixing plate 704. The output end of the cooling nozzle 711 corresponds to the position of the tool mounting seat 8, ensuring that the sprayed cutting fluid can act on the machining area of ​​the tool and the workpiece. The cooling nozzle 711 is made of metal bellows material, and the spray angle can be adjusted according to actual machining needs to ensure the cooling effect. A liquid supply hose 712 is fixedly connected to the input end of the cooling nozzle 711. The end of the liquid supply hose 712 away from the cooling nozzle 711 is fixedly connected to the output end of the drain pipe 713. Under the action of gas pressure, the cutting fluid in the cutting fluid tank 717 is transported to the cooling nozzle 711 through the drain pipe 713 and the liquid supply hose 712, and then sprayed onto the machining area by the cooling nozzle 711.

[0038] Working principle: The drive motor 607 is started, driving the linkage gear 605 to rotate. At this time, the electric telescopic rod 602 remains retracted, driving the U-shaped frame 603 to rotate around the support shaft 606, causing the linkage gear 605 to move to a position where it meshes with the first gear 608, while remaining disengaged from the second gear 610. The rotation of the linkage gear 605 is transmitted to the first gear 608 through gear meshing. The first gear 608 drives the rotating shaft 601 to rotate. The bottom end of the rotating shaft 601 is fixedly connected to the tool mounting base 8, thereby driving the tool mounting base 8 and the tool mounted on it to rotate synchronously at high speed. At this time, the tool has cutting capabilities, and in conjunction with the movement of the machine tool's Y-axis, milling and turning operations can be performed on the workpiece.

[0039] As the first gear 608 rotates, it meshes with the transmission gear 702, causing the transmission gear 702 to rotate. The transmission gear 702 then drives the transmission shaft 701 to rotate synchronously. The drive synchronous pulley 703 on the surface of the transmission shaft 701 rotates with the shaft, and through the transmission belt 719, drives the driven synchronous pulley 718 and the driven rod 706 to rotate. The guide impeller 707 at the top of the driven rod 706 rotates at high speed inside the air inlet housing 705, drawing in external air through the air inlet holes on the lower surface of the air inlet housing 705.

[0040] The airflow generated by the guide impeller 707 enters the conical guide shroud 708. After being guided by the conical guide shroud 708, it is delivered to the air inlet pipe 716 of the cutting fluid tank 717 through the air guide hose 710. The airflow enters the cutting fluid tank 717 in a unidirectional manner, increasing the air pressure inside the cutting fluid tank 717. The air pressure then pushes the cutting fluid in the cutting fluid tank 717 out through the drain pipe 713. The cutting fluid flows through the drain pipe 713 into the supply hose 712, and then from the supply hose 712 to the cooling spray pipe 711. The cooling spray pipe 711 sprays the cutting fluid onto the machining area between the tool and the workpiece.

[0041] When the Z-axis vertical position of the tool needs to be adjusted, the drive motor 607 continues to run, controlling the telescopic end of the electric telescopic rod 602 to push the U-shaped frame 603 to rotate around the support shaft 606. This causes the linkage gear 605 to move from a position meshing with the first gear 608 to a position meshing with the second gear 610, while simultaneously disengaging completely from the first gear 608. At this time, the power of the drive motor 607 driving the linkage gear 605 to rotate is transmitted to the second gear 610 through gear meshing. The second gear 610 drives the linkage shaft 609 to rotate. The rotation of the linkage shaft 609 directly drives the adjusting screw 501 to rotate synchronously. The adjusting screw drives the adjusting frame 3 to slide along the inner wall of the strip-shaped limit frame 2, and simultaneously drives the drive conversion mechanism 6, the tool mounting seat 8, and the tool mounted on the extension plate 4 to move synchronously along the Z-axis, achieving precise adjustment of the tool position.

[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A Z-axis transmission structure for a milling and turning machine tool, comprising a Z-axis fixed seat (1), a strip-shaped limiting frame (2), an adjusting frame (3), and an extension plate (4) disposed at its front end, characterized in that: Also includes: Z-axis positioning mechanism (5), which is fixedly installed inside the adjustment frame (3) for adjusting and positioning the tool in the Z-axis direction; A drive conversion mechanism (6) is fixedly mounted on the surface of the extension plate (4) and is used to switch the power between the tool and the Z-axis positioning mechanism (5). Cooling mechanism (7) is fixedly installed on the surface of the strip limit frame (2) and is used to cool and lower the temperature of the workpiece surface.

2. The Z-axis transmission structure of the milling and turning machine tool according to claim 1, characterized in that: The Z-axis positioning mechanism (5) includes an adjusting screw (501), which is rotatably connected between the inner bottom wall and the inner bottom wall of the adjusting frame (3). The surface of the adjusting screw (501) is threaded with a lifting block (502). The left and right ends of the lifting block (502) are fixedly connected to the left and right inner side walls of the strip-shaped limiting frame (2), respectively. The telescopic end of the electric telescopic rod (602) is rotatably connected to the surface of the U-shaped frame (603). The upper surface of the U-shaped frame (603) is fixedly connected with a support shaft (606). The top end of the support shaft (606) is rotatably connected to the lower surface of the extension plate (4). The surface of the U-shaped frame (603) is fixedly mounted with a drive motor (607). The rotating shaft of the drive motor (607) is fixedly connected to the center of the linkage gear (605).

3. The Z-axis transmission structure of the milling and turning machine tool according to claim 2, characterized in that: The drive conversion mechanism (6) includes a rotating shaft (601) rotatably mounted on the upper surface of the extension plate (4), and an electric telescopic rod (602) and a U-shaped frame (603) rotatably mounted on the lower surface of the extension plate (4). The bottom end of the rotating shaft (601) extends to the bottom of the extension plate (4) and is fixedly connected to a tool mounting seat (8). A linkage gear (605) is rotatably connected to the inner side of the U-shaped frame (603), and a first tooth is fixedly connected to the surface of the rotating shaft (601). The first gear (608) is positioned opposite to the linkage gear (605). The lower surface of the extension plate (4) is rotatably provided with a linkage shaft (609). The surface of the linkage shaft (609) is fixedly connected with a second gear (610). The second gear (610) and the first gear (608) are distributed on both sides of the linkage gear (605), and the first gear (608), the second gear (610) and the linkage gear (605) are all located on the same horizontal plane.

4. The Z-axis transmission structure of the milling and turning machine tool according to claim 3, characterized in that: The linkage shaft (609) is located directly below the adjusting screw (501), and the top end of the linkage shaft (609) extends into the interior of the adjusting frame (3) and is fixedly connected to the bottom end of the adjusting screw (501). The left and right sides of the adjusting frame (3) are provided with strip-shaped guide holes (503). The width of the strip-shaped guide hole (503) matches the lifting block (502). The lifting block (502) is slidably connected to the inner wall of the strip-shaped guide hole (503).

5. The Z-axis transmission structure of the milling and turning machine tool according to claim 4, characterized in that: The cooling mechanism (7) includes a coolant reservoir (717) fixedly connected to the back of the strip-shaped limiting frame (2), and a drive shaft (701) rotatably mounted on the lower surface of the extension plate (4). A drive gear (702) is fixedly connected to the end of the drive shaft (701). The position of the drive gear (702) corresponds to that of the first gear (608), and the drive gear (702) meshes with the first gear (608). A drive synchronizing device is fixedly connected to the surface of the drive shaft (701). The wheel (703) is fixedly connected to the side of the adjustment frame (3) with a fixing plate (704). The surface of the fixing plate (704) is provided with a mounting hole. An air inlet shell (705) is fixedly embedded in the inner wall of the mounting hole. A driven rod (706) is rotatably connected to the lower surface of the air inlet shell (705). A driven synchronous wheel (718) is fixed at the bottom end of the driven rod (706). A transmission belt (719) is installed between the drive synchronous wheel (703) and the driven synchronous wheel (718).

6. The Z-axis transmission structure of a milling and turning machine tool according to claim 5, characterized in that: The top of the driven rod (706) extends into the interior of the air inlet housing (705), and a guide impeller (707) is fixedly installed on the surface of the driven rod (706). A conical air guide hood (708) is fixedly installed on the upper surface of the fixed plate (704). The position of the conical air guide hood (708) corresponds to that of the air inlet housing (705), and the air inlet of the conical air guide hood (708) corresponds to the air outlet of the guide impeller (707). A plurality of air inlet holes are opened on the lower surface of the air inlet housing (705). A dust filter (709) is fixedly connected to the inner wall of the air inlet hole. The position of the air inlet hole corresponds to the air inlet end of the guide impeller (707). A guide hose (710) is fixedly connected to the output end of the conical air guide hood (708).

7. The Z-axis transmission structure of a milling and turning machine tool according to claim 6, characterized in that: Cooling nozzles (711) are fixedly embedded on the surface of the fixing plate (704). The output end of the cooling nozzles (711) corresponds to the position of the tool mounting base (8). The cooling nozzles (711) are made of metal corrugated pipe. A liquid supply hose (712) is fixedly connected to the input end of the cooling nozzles (711). A drain pipe (713) is fixedly embedded at the bottom end of the cutting fluid tank (717). The end of the liquid supply hose (712) away from the cooling nozzles (711) is fixedly connected to the output end of the drain pipe (713). A one-way drain valve (714) is fixedly provided on the surface of the drain pipe (713).

8. The Z-axis transmission structure of a milling and turning machine tool according to claim 7, characterized in that: The top of the cutting fluid tank (717) is fixedly embedded with a filling pipe (715), and the end of the filling pipe (715) is threaded with a sealing cap. The surface of the cutting fluid tank (717) is fixedly embedded with an air inlet pipe (716). The output end of the air guide hose (710) is fixedly connected to the air inlet end of the air inlet pipe (716). The surface of the air inlet pipe (716) is fixedly provided with a one-way air inlet valve.

9. The Z-axis transmission structure of a milling and turning machine tool according to claim 1, characterized in that: A protective cover (9) is fixedly provided on the lower surface of the extension plate (4), and the position of the protective cover (9) corresponds to the drive conversion mechanism (6).

10. The Z-axis transmission structure of a milling and turning machine tool according to claim 1, characterized in that: The Z-axis mounting base (1) has bolt fixing holes on its surface. The Z-axis mounting base (1) is fixedly connected to the Y-axis slider of the machine tool through bolts and bolt fixing holes.

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