Machine tool

Abstract

The invention discloses a machine tool. The machine tool comprises a base, a lead screw transmission mechanism, a driving mechanism and a spindle box. The lead screw transmission mechanism comprises a lead screw main body, a rotating nut and a supporting seat, the lead screw main body is movably arranged on the base, the outer surface of the lead screw main body is rotatably sleeved with the rotating nut, and the supporting seat is arranged on the base and arranged on the outer surface of the rotating nut in a sleeving mode; the supporting seat is provided with a first cooling liquid inlet, a first cooling liquid outlet and a cooling flow channel, and the cooling flow channel is arranged on the side, close to the rotating nut, of the supporting seat in a surrounding mode in the circumferential direction of the supporting seat; the lead screw body is provided with a cooling channel, a second cooling liquid inlet, a second cooling liquid outlet and a cooling pipeline, heat conduction fluid is arranged in the cooling channel, the cooling pipeline is located in the cooling channel, and the two opposite ends of the cooling pipeline communicate with the second cooling liquid inlet and the second cooling liquid outlet correspondingly. The problem that in the prior art, a ball screw transmission mechanism is low in precision can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of processing equipment, and in particular to a machine tool. Background Art

[0002] Ball screw transmission mechanism has the advantages of high transmission efficiency, high precision and low noise, and is widely used in the fields of processing machine tools. As the main transmission component, the ball screw transmission mechanism generates a lot of heat due to friction between the screw shaft and the nut during its high-speed rotation, which causes the screw shaft to deform and elongate due to heat, reducing the accuracy of the ball screw transmission mechanism, and further affecting the processing accuracy of the workpiece. Summary of the invention

[0003] The main purpose of the present application is to provide a machine tool to solve the problem of low precision of the ball screw transmission mechanism in the prior art.

[0004] According to one aspect of the present application, there is provided a machine tool, comprising:

[0005] Base;

[0006] A screw transmission mechanism, the screw transmission mechanism is rotatably arranged on the base, the screw transmission mechanism comprises a screw body, a rotating nut and a supporting seat, the screw body is movably arranged on the base and extends along a first direction, the rotating nut is rotatably sleeved on the outer surface of the screw body, and the supporting seat is arranged on the base and sleeved on the outer surface of the rotating nut;

[0007] A driving mechanism, the driving mechanism is connected to the rotating nut to drive the rotating nut to rotate around the axis of the screw body and drive the screw body to reciprocate along the first direction;

[0008] A spindle box, the spindle box is arranged on the base and connected to the lead screw body;

[0009] Wherein, a first cooling component is arranged on the support seat, and the first cooling component includes a first coolant inlet, a first coolant outlet and a cooling channel, the cooling channel is connected between the first coolant inlet and the first coolant outlet, and the cooling channel is arranged around the support seat along the circumference of the support seat on one side of the support seat close to the rotating nut;

[0010] A cooling channel and a second cooling assembly are provided on the screw body, the second cooling assembly includes a second coolant inlet, a second coolant outlet and a cooling pipe, a heat transfer fluid is provided in the cooling channel, the cooling pipe is located in the cooling channel, and opposite ends of the cooling pipe are respectively connected to the second coolant inlet and the second coolant outlet.

[0011] Furthermore, the first coolant inlet and the first coolant outlet are relatively arranged on the support seat along the circumferential direction of the support seat and extend along the radial direction of the screw body, and the first coolant inlet and the first coolant outlet are respectively connected to the cooling channel and are respectively connected to the outside through pipe joints.

[0012] Furthermore, an airtight component is also provided on the support seat, and the airtight component includes an air inlet, an air inlet channel and a gas flow channel. The air inlet is connected to the gas flow channel through the air inlet channel, and the air inlet is connected to the outside through a pipe joint. The gas flow channel is arranged on two sides opposite to each other along the first direction of the cooling flow channel and is spaced apart from the cooling flow channel, and the gas flow channel is arranged around the circumference of the support seat.

[0013] Further, within the projection of the screw transmission mechanism along the first direction, the projection of the gas flow channel covers the projection of the cooling flow channel.

[0014] Further, along the circumference of the support seat, the air inlet is arranged between the first coolant inlet and the first coolant outlet and extends along the radial direction of the screw body, and within the projection of the screw transmission mechanism along the first direction, the projection of the air inlet, the projection of the first coolant outlet and the projection of the first coolant inlet form an isosceles triangle.

[0015] Further, the cooling channel extends along the axial direction of the screw body, the second coolant inlet and the second coolant outlet are arranged on the same side or opposite sides of the cooling channel, and the second coolant inlet and the second coolant outlet are both connected to the outside through a pipe joint; and / or,

[0016] The outer surface of the cooling pipe is sleeved with a guide sleeve, and the guide sleeve has a chamfered angle.

[0017] Furthermore, a sealing assembly is provided at the opening of the cooling channel, and the sealing assembly includes a sealing plug and a sealing ring. The sealing plug has an avoidance hole for the cooling pipe to pass through, and the sealing ring is sleeved on the outer surface of the sealing plug.

[0018] Further, the cooling pipe comprises a cooling copper pipe or a cooling aluminum pipe; and / or,

[0019] The guide sleeve sleeved on the outer surface of the cooling pipe includes a guide copper sleeve or a guide aluminum sleeve; and / or,

[0020] A protective cover is provided on the lead screw body.

[0021] Furthermore, the driving mechanism comprises:

[0022] A driving motor, wherein the driving motor is arranged on the base;

[0023] A pulley assembly, wherein the pulley assembly is arranged on the base and is drivingly connected to the driving motor, the pulley assembly includes a first pulley, a second pulley and a synchronous belt, the first pulley is connected to the output shaft of the driving motor, the second pulley is sleeved on the outer periphery of the screw body and connected to the rotating nut, the synchronous belt is sleeved on the outer surfaces of the first pulley and the second pulley and is located between the first pulley and the second pulley, and the second pulley rotates driven by the first pulley and the synchronous belt.

[0024] Furthermore, the machine tool also includes a balancing hydraulic cylinder, which is arranged on the base and connected to the spindle box, and the screw body and the balancing hydraulic cylinder synchronously drive the spindle box to reciprocate along the first direction.

[0025] In the present application, for the cooling method of the rotating nut, the present application is to set a cooling channel on one side of the support seat close to the rotating nut, inject coolant through the first coolant inlet, so that the coolant flows through the cooling channel and contacts the rotating nut to take away the heat generated by the rotating nut, and then flows out from the second coolant outlet; for the cooling method of the screw body, the present application is to open a cooling channel on the screw body (that is, the screw body adopts a hollow structure), fill the cooling channel with a heat transfer fluid, and place a cooling pipe in the cooling channel, the heat transfer fluid in the cooling channel will first absorb the heat of the screw body, the coolant flows in from the second coolant inlet, and in the process of flowing through the cooling pipe, it will exchange heat with the heat transfer fluid, thereby taking away the heat generated by the screw body, and then flowing out from the second coolant outlet. In this way, the temperature of the rotating nut and the screw body can be reduced at the same time, to a certain extent, the working environment temperature of the rotating nut and the screw body is maintained in a relatively stable range, effectively preventing the screw body from being heated and thermally deformed, improving the transmission accuracy of the screw body, and extending the service life of the screw transmission mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 A cross-sectional view of a machine tool disclosed in an embodiment of the present application;

[0028] Figure 2 It is a structural schematic diagram of the screw transmission mechanism disclosed in the embodiment of the present application;

[0029] Figure 3 The attached embodiment disclosed in this application Figure 2 Middle FF section view;

[0030] Figure 4 The attached embodiment disclosed in this application Figure 3 A magnified image of area A;

[0031] Figure 5 The attached embodiment disclosed in this application Figure 3 Enlarged view of area B;

[0032] Figure 6 The attached embodiment disclosed in this application Figure 3 Enlarged view of the middle C area;

[0033] Figure 7 A top view of the screw transmission mechanism disclosed in the embodiment of the present application;

[0034] Figure 8 The attached embodiment disclosed in this application Figure 7 Middle GG section view;

[0035] Fig. 9 The attached embodiment disclosed in this application Figure 8 Enlarged view of area D in the middle;

[0036] Fig.10 The attached embodiment disclosed in this application Figure 8 Magnified view of region F.

[0037] The above drawings include the following reference numerals:

[0038] 10. Base; 11. Balance hydraulic cylinder; 20. Screw transmission mechanism; 21. Screw body; 211. Cooling channel; 212. Protective cover; 22. Rotating nut; 23. Support seat; 30. Driving mechanism; 31. Driving motor; 32. Pulley assembly; 321. First pulley; 322. Second pulley; 323. Synchronous belt; 40. Spindle box; 50. First cooling assembly; 51. First coolant inlet; 52. First coolant outlet; 53. Cooling channel; 60. Second cooling assembly; 61. Second coolant inlet; 62. Second coolant outlet; 63. Cooling pipeline; 70. Airtight assembly; 71. Air inlet; 72. Air inlet channel; 73. Gas channel; 80. Guide sleeve; 81. Chamfer; 90. Sealing assembly; 91. Sealing plug; 92. Sealing ring; 100. Pipe joint. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0042] As mentioned in the background technology, during the high-speed rotation of the existing ball screw transmission mechanism, a large amount of heat will be generated due to friction between the screw shaft and the nut, which will cause the screw shaft to be thermally deformed and elongated, reducing the accuracy of the ball screw transmission mechanism, thereby affecting the processing accuracy of the workpiece. To this end, the inventor of this application has designed a new type of machine tool, through which the problem of low accuracy of the ball screw transmission mechanism in the prior art can be solved. The machine tool of this application will be described in detail in conjunction with the accompanying drawings.

[0043] See also Figures 1 to 10 As shown, according to an embodiment of the present application, a machine tool is provided, which includes a base 10, a screw transmission mechanism 20, a drive mechanism 30 and a spindle box 40.

[0044] Specifically, the screw transmission mechanism 20 is rotatably arranged on the base 10, and the screw transmission mechanism 20 includes a screw body 21, a rotating nut 22 and a support seat 23. The screw body 21 is movably arranged on the base 10 and extends along the first direction. The rotating nut 22 is rotatably sleeved on the outer surface of the screw body 21. The support seat 23 is arranged on the base 10 and sleeved on the outer surface of the rotating nut 22; the driving mechanism 30 is drivingly connected to the rotating nut 22 to drive the rotating nut 22 to rotate around the axis of the screw body 21 and drive the screw body 21 to reciprocate along the first direction; the spindle box 40 is arranged on the base 10 and connected to the screw body 21; wherein, a first cooling component 50 is arranged on the support seat 23, and a first cooling component 50 is arranged on the support seat 23. A cooling component 50 includes a first coolant inlet 51, a first coolant outlet 52 and a cooling channel 53. The cooling channel 53 is connected between the first coolant inlet 51 and the first coolant outlet 52, and the cooling channel 53 is arranged around the support seat 23 along the circumference of the support seat 23 on one side of the support seat 23 close to the rotating nut 22; a cooling channel 211 and a second cooling component 60 are arranged on the screw body 21. The second cooling component 60 includes a second coolant inlet 61, a second coolant outlet 62 and a cooling pipe 63. There is a heat transfer fluid in the cooling channel 211. The cooling pipe 63 is located in the cooling channel 211, and the opposite ends of the cooling pipe 63 are respectively connected to the second coolant inlet 61 and the second coolant outlet 62.

[0045] It should be noted that the "first direction" in this application refers to the Figure 1 The direction indicated by the letter X in the figure; the coolant in the present application can be selected according to the actual heating condition of the screw, for example, oil, water or gas refrigerant can be selected as the cooling medium to cool the rotating nut 22 and the screw body 21, so as to effectively improve the cooling efficiency; the heat transfer fluid in the present application generally adopts deionized water to increase alcohol substances such as ethylene glycol or propylene glycol to achieve the purpose of lowering the freezing point and raising the boiling point, and may also contain additives such as corrosion inhibitors, bactericides and defoaming agents.

[0046] In this embodiment, the support seat 23 provides support for the rotating nut 22, the first cooling assembly 50 provides cooling for the rotating nut 22, and the second cooling assembly 60 provides cooling for the screw body 21. Since the driving mechanism 30 in this embodiment is drivingly connected to the screw transmission mechanism 20, when the driving mechanism 30 starts to work, it can drive the rotating nut 22 to rotate, thereby driving the screw body 21 to reciprocate in the first direction, and then driving the spindle box 40 to move.

[0047] It is worth noting that during the operation of the screw transmission mechanism 20, a large amount of heat will be generated due to friction between the rotating nut 22 and the screw body 21, causing thermal deformation of the screw body 21 and reducing the accuracy of the screw body 21. To this end, the present embodiment is provided with a first coolant inlet 51, a first coolant outlet 52 and a cooling channel 53 on the support seat 23. The coolant can enter from the first coolant inlet 51, flow through the cooling channel 53, and then flow out from the first coolant outlet 52. In this process, since the cooling channel 53 is arranged along the circumference of the support seat 23 on the side of the support seat 23 close to the rotating nut 22, the coolant in the cooling channel 53 will come into contact with the rotating nut 22, thereby absorbing the heat generated by the rotating nut 22 during operation, effectively reducing the temperature of the rotating nut 22, and ensuring that the working environment temperature of the rotating nut 22 is maintained within a relatively stable range; at the same time, the present embodiment also The screw body 21 is provided with a cooling channel 211, a second coolant inlet 61, a second coolant outlet 62 and a cooling pipe 63, and the cooling channel 211 is filled with a heat transfer fluid, and the coolant can enter from the second coolant inlet 61, flow through the cooling pipe 63, and then flow out from the second coolant outlet 62. In this process, since the heat transfer fluid absorbs the heat generated by the screw body 21, the coolant can exchange heat with the heat transfer fluid in the cooling channel 211 after entering the cooling pipe 63, thereby taking away the heat generated by the screw body 21, effectively reducing the temperature of the screw body 21, and ensuring that the working environment temperature of the screw body 21 is maintained within a relatively stable range. In addition, the coolant in the cooling pipe 63 will not cross-contaminate with the heat transfer fluid, which can ensure that the coolant and the heat transfer fluid each exert their best performance to maintain the cooling effect of the screw body 21, and effectively ensure the normal operation of the entire cooling system.

[0048] That is to say, with respect to the cooling method of the rotating nut 22, in this embodiment, a cooling channel 53 is provided on one side of the support seat 23 close to the rotating nut 22, and coolant is injected through the first coolant inlet 51, so that the coolant flows through the cooling channel 53 and contacts with the rotating nut 22, so as to take away the heat generated by the rotating nut 22, and then flows out from the second coolant outlet 62; with respect to the cooling method of the screw body 21, in this embodiment, a cooling channel 211 is opened on the screw body 21 (that is, the screw body 21 adopts a hollow structure), and a heat transfer fluid is filled in the cooling channel 211, and a cooling pipe 63 is placed in the cooling channel 211, the heat transfer fluid in the cooling channel 211 will first absorb the heat of the screw body 21, the coolant flows in from the second coolant inlet 61, and in the process of flowing through the cooling pipe 63, it will exchange heat with the heat transfer fluid, thereby taking away the heat generated by the screw body 21, and then flows out from the second coolant outlet 62. Such a configuration can simultaneously reduce the temperature of the rotating nut 22 and the screw body 21, and to a certain extent ensure that the working environment temperature of the rotating nut 22 and the screw body 21 remains in a relatively stable range, effectively preventing the screw body 21 from being heated and thermally deformed, thereby improving the transmission accuracy of the screw body 21 and extending the service life of the screw transmission mechanism 20.

[0049] Exemplarily, in this embodiment, the temperature C of the coolant entering from the first coolant inlet 51 and the second coolant inlet 61 satisfies the relationship: 19.8°C≤C≤20.2°C, for example, C can be set to 19.8°C, 19.9°C, 20°C, 20.1°C, 20.2°C, etc., and the pressure of the coolant is 0.5Mpa.

[0050] Combine again Figure 1 As shown, since the screw body 21 in this embodiment extends along the first direction and one end of the screw body 21 is connected to the spindle box 40, such an arrangement can make the transmission structure of the spindle box 40 more compact and effectively improve the space utilization of the machine tool.

[0051] Further, see Figure 2 , Figure 7 as well as Fig. 9 As shown, in this embodiment, the first coolant inlet 51 and the first coolant outlet 52 are arranged on the support seat 23 relatively along the circumferential direction of the support seat 23 and extend along the radial direction of the screw body 21, and the first coolant inlet 51 and the first coolant outlet 52 are respectively connected to the cooling channel 53 and are respectively connected to the outside through the pipe joint 100.

[0052] Specifically, the first coolant inlet 51 and the first coolant outlet 52 in this embodiment are connected to an external hydraulic station or oil cooler through a pipe joint 100 to form a circulation flow process of the coolant. At the same time, since the first coolant inlet 51 and the first coolant outlet 52 in this embodiment are relatively arranged on the support seat 23 along the circumference of the support seat 23, it is conducive to the coolant to form a good circulation in the cooling channel 53, ensuring that the coolant can fully contact each part of the cooling channel 53, thereby effectively absorbing the heat generated by the rotating nut 22, avoiding the heat accumulation of the rotating nut 22 during the high-speed rotation process, and improving the service life of the rotating nut 22. In other words, the first coolant inlet 51 and the first coolant outlet 52 arranged relatively can allow the coolant to completely cover the cooling channel 53, so that the coolant completely covers the peripheral side of the rotating nut 22, effectively improving the cooling efficiency. In addition, the first coolant inlet 51 and the first coolant outlet 52 in this embodiment both extend along the radial direction of the screw body 21. Such an arrangement has a simple structure and is easy to process.

[0053] Further, see Figure 3 to Figure 4 As shown, an airtight component 70 is also provided on the support seat 23 in this embodiment. The airtight component 70 includes an air inlet 71, an air inlet channel 72 and a gas flow channel 73. The air inlet 71 is connected with the gas flow channel 73 through the air inlet channel 72, and the air inlet 71 is connected with the outside through the pipe joint 100. The gas flow channel 73 is arranged on two sides opposite to the cooling flow channel 53 along the first direction and is spaced apart from the cooling flow channel 53, and the gas flow channel 73 is arranged around the circumference of the support seat 23.

[0054] Specifically, since the gas flow channel 73 in this embodiment is arranged on two opposite sides of the cooling flow channel 53 along the first direction and is spaced from the cooling flow channel 53, when gas is introduced into the air inlet 71, the gas can fill the peripheral area of ​​the cooling flow channel 53, and the gas in the gas flow channel 73 can seal the coolant in the cooling flow channel 53 from two directions to prevent the coolant from leaking. At the same time, the gas in the gas flow channel 73 can form a gas barrier between the cooling flow channel 53 and the outside world, effectively preventing external impurities from entering the cooling flow channel 53, ensuring that the coolant circulates in a clean environment, and ensuring the efficient operation of the cooling system.

[0055] Exemplarily, in this embodiment, the pressure of the gas entering from the gas inlet 71 is 0.3 MPa.

[0056] Furthermore, in the present embodiment, within the projection of the screw transmission mechanism 20 along the first direction, the projection of the gas flow channel 73 covers the projection of the cooling flow channel 53 .

[0057] Specifically, when the projection of the gas flow channel 73 covers the projection of the cooling flow channel 53, it means that the gas flow channels 73 arranged on the opposite sides of the cooling flow channel 53 completely surround the cooling flow channel 53. In this way, even if the cooling flow channel 53 leaks coolant, the gas flow channel 73 can block the cooling flow channel 53 in all directions, thereby better preventing coolant leakage.

[0058] Furthermore, the air inlet channel 72 in this embodiment is arranged obliquely to the air inlet 71 or perpendicular to the air inlet 71, so that the structure is simple and easy to process. Figure 4 FIG. 7 shows a case where the air inlet channel 72 is inclined to the air inlet port 71. It is understood that when the air inlet channel 72 is inclined to the air inlet port 71, the inclination angle between the air inlet channel 72 and the air inlet port 71 can be set to any value, which is not specifically limited in this application and can be set according to actual processing requirements. Figure 4 FIG. 7 shows a case where the inclination angle between the air intake passage 72 and the air intake port 71 is set to 45°.

[0059] Further, see Figure 4 as well as Figure 7 As shown, along the circumference of the support seat 23, the air inlet 71 in this embodiment is arranged between the first coolant inlet 51 and the first coolant outlet 52 and extends along the radial direction of the screw body 21, and in the projection of the screw transmission mechanism 20 along the first direction, the projection of the air inlet 71, the projection of the first coolant outlet 52 and the projection of the first coolant inlet 51 form an isosceles triangle.

[0060] Specifically, in this embodiment, the air inlet 71 is arranged between the first coolant inlet 51 and the first coolant outlet 52, and the projections of the three of them form an isosceles triangle. This layout can efficiently utilize the space around the support seat 23, ensuring that the first coolant inlet 51, the first coolant outlet 52 and the air inlet 71 all have suitable positions on the support seat 23, and there will be no situation where a certain component is difficult to install due to insufficient space. At the same time, the isosceles triangle arrangement of the three is conducive to the coordinated work between the coolant and the gas. The gas in the gas flow channel 73 can provide a stable pressure environment during the flow of the coolant, prevent the coolant from generating turbulence due to local pressure changes during the flow process, and ensure that the coolant can circulate in the cooling channel 53 at a stable flow rate and flow rate, thereby improving the cooling effect.

[0061] Further, see Figures 3 to 6As shown, the cooling channel 211 in this embodiment extends along the axial direction of the screw body 21, and the second coolant inlet 61 and the second coolant outlet 62 are arranged on the same side or opposite sides of the cooling channel 211, and the second coolant inlet 61 and the second coolant outlet 62 are both connected to the outside through the pipe joint 100. It can be understood that the second coolant inlet 61 and the second coolant outlet 62 can be arranged on the same side of the cooling channel 211, or on opposite sides of the cooling channel 211. Figure 5 2 shows a situation where the second coolant inlet 61 and the second coolant outlet 62 are arranged on the same side of the cooling channel 211 .

[0062] Specifically, in this embodiment, the cooling channel 211 extends along the axial direction of the screw body 21, which can ensure that the coolant is effectively covered in the length direction of the screw body 21. During the operation of the screw body 21, the entire axial part of the screw body 21 may generate heat due to factors such as friction. The axially extending cooling channel 211 allows the heat transfer fluid to fully absorb the heat inside the screw body 21, so that when the coolant flows from the second coolant inlet 61 into the cooling pipe 63, it can exchange heat with the heat transfer fluid to take away the heat generated by the screw body 21, effectively improving the transmission accuracy of the screw body 21. At the same time, the second coolant inlet 61 and the second coolant outlet 62 in this embodiment are connected to an external hydraulic station or oil cooler through a pipe joint 100 to form a circulation flow process of the coolant.

[0063] Further, in order to ensure the stability of the cooling pipe 63, see Figures 9 and 10 As shown, the outer surface of the cooling pipe 63 in this embodiment is sleeved with a guide sleeve 80 , and the guide sleeve 80 has a chamfered angle 81 .

[0064] Specifically, since the screw body 21 needs to determine its own length according to the stroke of the spindle box 40, when the length of the screw body 21 is relatively long, in order to improve the stability of the cooling pipe 63 in the screw body 21 during the high-speed movement of the screw body 21, the present embodiment provides a guide sleeve 80 on the outer surface of the cooling pipe 63, and the guide sleeve 80 has a chamfer 81, which helps to position the installation of the cooling pipe 63. In the process of inserting the cooling pipe 63 into the cooling channel 211, the chamfer 81 can cooperate with the entrance edge of the cooling channel 211 to guide the cooling pipe 63 to accurately enter the center position of the cooling channel 211, thereby avoiding the cooling pipe 63 from colliding or deviating from the cooling channel 211 during the installation process, and enhancing the stability of the cooling pipe 63 after installation. At the same time, vibrations and various dynamic forces will be generated during the operation of the screw transmission mechanism 20. The setting of the guide sleeve 80 can form a close contact with the inner wall of the cooling channel 211, thereby limiting the radial movement of the cooling pipe 63, effectively reducing the shaking of the cooling pipe 63 caused by vibration, and ensuring the reliability of the cooling pipe 63 to a certain extent.

[0065] Optionally, the guide sleeve 80 in this embodiment includes at least one, and when the guide sleeve 80 includes a plurality of guide sleeves, the plurality of guide sleeves 80 are arranged at intervals along the first direction. Specifically, the guide sleeve 80 in this embodiment can be provided as one, or can be provided as two or more.

[0066] Further, see Figure 5 As shown, a sealing assembly 90 is provided at the opening of the cooling channel 211 in this embodiment. The sealing assembly 90 includes a sealing plug 91 and a sealing ring 92. The sealing plug 91 has an avoidance hole for the cooling pipe 63 to pass through, and the sealing ring 92 is sleeved on the outer surface of the sealing plug 91.

[0067] Specifically, the setting of the sealing assembly 90 can ensure that the heat transfer fluid in the cooling channel 211 will not leak. Since the cooling channel 211 is opened inside the screw body 21, if the opening of the cooling channel 211 is not sealed, the heat transfer fluid will leak. To this end, the sealing plug 91 is set at the opening of the cooling channel 211 in this embodiment, and a sealing ring 92 is sleeved on the outer surface of the sealing plug 91. In this way, when the sealing plug 91 is installed at the opening of the cooling channel 211, the sealing ring 92 is squeezed between the sealing plug 91 and the edge of the opening of the cooling channel 211 to form a tight seal, effectively avoiding the loss of the heat transfer fluid. At the same time, the setting of the sealing plug 91 and the sealing ring 92 can effectively block impurities such as dust and moisture outside the cooling channel 211, ensure the cleanliness of the inside of the cooling channel 211, and extend the service life of the cooling system. In addition, the sealing plug 91 is provided with an avoidance hole for the cooling pipe 63 to pass through, which facilitates the installation of the cooling pipe 63.

[0068] Exemplarily, the sealing plug 91 in this embodiment includes a rubber plug.

[0069] Furthermore, the cooling pipe 63 in this embodiment includes a cooling copper pipe or a cooling aluminum pipe. Specifically, since copper and aluminum have high thermal conductivity, when the cooling pipe 63 includes a cooling copper pipe or a cooling aluminum pipe, both pipes can ensure that the heat absorbed by the heat transfer fluid can be taken away in time, effectively reducing the temperature of the screw body 21 and improving the transmission accuracy of the screw body 21.

[0070] Furthermore, the guide sleeve 80 in this embodiment, which is sleeved on the outer surface of the cooling pipe 63, includes a guide copper sleeve or a guide aluminum sleeve. Specifically, since copper and aluminum have high thermal conductivity, when the guide sleeve 80 is sleeved on the outer surface of the cooling pipe 63, it can help the cooling pipe 63 to conduct heat better, effectively assist the heat dissipation of the cooling pipe 63, and improve the efficiency of the entire cooling system.

[0071] Further, in order to prevent impurities such as dust and moisture from entering the screw body 21, see Figure 1 As shown, a protective cover 212 is provided on the lead screw body 21 in this embodiment.

[0072] Specifically, in the working environment of the screw transmission mechanism 20, there may be impurities such as dust, debris, and moisture. The setting of the protective cover 212 can effectively block these impurities from entering the screw body 21, avoiding these impurities from causing wear to the screw body 21, and ensuring the accuracy and surface quality of the screw body 21 to a certain extent.

[0073] Further, see Figure 1 As shown, the driving mechanism 30 in this embodiment includes a driving motor 31 and a pulley assembly 32. The driving motor 31 is arranged on the base 10; the pulley assembly 32 is arranged on the base 10 and is drivingly connected to the driving motor 31. The pulley assembly 32 includes a first pulley 321, a second pulley 322 and a synchronous belt 323. The first pulley 321 is connected to the output shaft of the driving motor 31, the second pulley 322 is sleeved on the outer periphery of the lead screw body 21 and connected to the rotating nut 22, the synchronous belt 323 is sleeved on the outer surfaces of the first pulley 321 and the second pulley 322 and is located between the first pulley 321 and the second pulley 322. The second pulley 322 rotates under the drive of the first pulley 321 and the synchronous belt 323. Exemplarily, the driving motor 31 in this embodiment includes a servo motor.

[0074] Specifically, in this embodiment, the driving motor 31 drives the first pulley 321 to rotate, and the first pulley 321 drives the second pulley 322 to rotate synchronously through the synchronous belt 323, thereby driving the rotating nut 22 to rotate, and then driving the screw body 21 to reciprocate along the first direction to achieve the movement of the spindle box 40. Among them, the pulley assembly 32 can achieve precise transmission, so that the rotating nut 22 rotates at a predetermined speed, and then drives the screw body 21 to reciprocate along the first direction, meeting the requirements of high-precision processing. At the same time, the synchronous belt 323 in this embodiment has good flexibility, which can effectively transmit the power of the driving motor 31, ensuring that the rotating nut 22 obtains sufficient torque to drive the screw body 21 to reciprocate along the first direction.

[0075] For example, in this embodiment, the second pulley 322 and the rotating nut 22 may be connected by means of structural members such as screws and studs.

[0076] Further, see Figure 1 As shown, the machine tool in this embodiment also includes a balancing hydraulic cylinder 11, which is arranged on the base 10 and connected to the spindle box 40. The screw body 21 and the balancing hydraulic cylinder 11 synchronously drive the spindle box 40 to reciprocate along the first direction.

[0077] Specifically, during the operation of the machine tool, the spindle box 40 usually has a large mass, and its own gravity will generate a large load on the screw body 21. In this embodiment, the balancing hydraulic cylinder 11 is connected to the spindle box 40, which can generate a balancing force opposite to the direction of gravity. For example, when the spindle box 40 moves upward, the balancing hydraulic cylinder 11 provides an upward thrust, partially offsets the gravity of the spindle box 40, and reduces the load of the screw body 21, thereby reducing the driving force required by the screw transmission mechanism 20, reducing the output power of the motor, and effectively improving the energy utilization efficiency. At the same time, since the balancing hydraulic cylinder 11 balances part of the gravity load, the interference force on the screw body 21 when driving the spindle box 40 to move is reduced, which helps to improve the position accuracy and movement stability of the spindle box 40 during the reciprocating motion. In addition, the screw body 21 and the balancing hydraulic cylinder 11 synchronously drive the spindle box 40 to reciprocate along the first direction, and the synergistic effect of the two can enhance the stability of the movement of the spindle box 40 and reduce the vibration and impact of the spindle box 40.

[0078] In combination with the above embodiments, it can be known that the machine tool of the present application has the following advantages:

[0079] (1) The present application provides a first coolant inlet 51, a first coolant outlet 52 and a cooling channel 53 on the support seat 23, and the cooling channel 53 is arranged around the support seat 23 along the circumference of the support seat 23 on a side of the support seat 23 close to the rotating nut 22. In this way, the heat generated by the rotating nut 22 during operation can be absorbed, the temperature of the rotating nut 22 can be effectively reduced, the heat accumulation generated when the rotating nut 22 rotates at high speed can be avoided, and the service life of the rotating nut 22 can be extended;

[0080] (2) The present application provides a cooling channel 211, a second coolant inlet 61, a second coolant outlet 62 and a cooling pipe 63 on the screw body 21, and the cooling channel 211 is filled with a heat transfer fluid, so as to ensure that the temperature of the screw body 21 remains constant, avoid deformation of the screw body 21 due to heat, and effectively improve the transmission accuracy of the screw body 21;

[0081] (3) In the present application, a guide sleeve 80 is provided on the outer surface of the cooling pipe 63, and the guide sleeve 80 has a chamfer angle 81, which can avoid the collision between the cooling pipe 63 and the cooling channel 211, thereby ensuring the stability of the heat exchange efficiency and effectively improving the transmission accuracy of the screw body 21.

[0082] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0083] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0084] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A machine tool, characterized in that: include: Base (10); A screw transmission mechanism (20), the screw transmission mechanism (20) is rotatably arranged on the base (10), the screw transmission mechanism (20) comprises a screw body (21), a rotating nut (22) and a support seat (23), the screw body (21) is movably arranged on the base (10) and extends along a first direction, the rotating nut (22) is rotatably sleeved on the outer surface of the screw body (21), and the support seat (23) is arranged on the base (10) and sleeved on the outer surface of the rotating nut (22); a driving mechanism (30), the driving mechanism (30) being drivingly connected to the rotating nut (22) so as to drive the rotating nut (22) to rotate around the axis of the screw body (21) and drive the screw body (21) to reciprocate along the first direction; A spindle box (40), the spindle box (40) being arranged on the base (10) and connected to the lead screw body (21); Wherein, a first cooling component (50) is arranged on the support seat (23), and the first cooling component (50) comprises a first cooling liquid inlet (51), a first cooling liquid outlet (52) and a cooling channel (53), and the cooling channel (53) is connected between the first cooling liquid inlet (51) and the first cooling liquid outlet (52), and the cooling channel (53) is arranged around the support seat (23) along the circumference of the support seat (23) on one side of the support seat (23) close to the rotating nut (22); A cooling channel (211) and a second cooling assembly (60) are provided on the screw body (21); the second cooling assembly (60) comprises a second coolant inlet (61), a second coolant outlet (62) and a cooling pipe (63); a heat transfer fluid is provided in the cooling channel (211); the cooling pipe (63) is located in the cooling channel (211), and opposite ends of the cooling pipe (63) are respectively connected to the second coolant inlet (61) and the second coolant outlet (62).

2. The machine tool according to claim 1, characterized in that: The first coolant inlet (51) and the first coolant outlet (52) are arranged on the support seat (23) relative to each other along the circumferential direction of the support seat (23) and extend along the radial direction of the screw body (21), and the first coolant inlet (51) and the first coolant outlet (52) are respectively connected to the cooling channel (53) and are respectively connected to the outside through the pipe joint (100).

3. The machine tool according to claim 1, characterized in that: The support seat (23) is also provided with an airtight component (70), the airtight component (70) comprising an air inlet (71), an air inlet channel (72) and a gas flow channel (73), the air inlet (71) being connected to the gas flow channel (73) via the air inlet channel (72), and the air inlet (71) being connected to the outside via a pipe joint (100), the gas flow channel (73) being arranged on two sides of the cooling flow channel (53) opposite to each other along the first direction and spaced apart from the cooling flow channel (53), and the gas flow channel (73) being arranged around the circumference of the support seat (23).

4. The machine tool according to claim 3, characterized in that: In the projection of the screw transmission mechanism (20) along the first direction, the projection of the gas flow channel (73) covers the projection of the cooling flow channel (53).

5. The machine tool according to claim 3, characterized in that: Along the circumference of the support seat (23), the air inlet (71) is arranged between the first coolant inlet (51) and the first coolant outlet (52) and extends along the radial direction of the screw body (21), and within the projection of the screw transmission mechanism (20) along the first direction, the projection of the air inlet (71), the projection of the first coolant outlet (52) and the projection of the first coolant inlet (51) form an isosceles triangle.

6. The machine tool according to claim 1, characterized in that: The cooling channel (211) extends along the axial direction of the screw body (21), the second coolant inlet (61) and the second coolant outlet (62) are arranged on the same side or on opposite sides of the cooling channel (211), and the second coolant inlet (61) and the second coolant outlet (62) are both connected to the outside through a pipe joint (100); and / or, The outer surface of the cooling pipe (63) is sleeved with a guide sleeve (80), and the guide sleeve (80) has a chamfered angle (81).

7. The machine tool according to claim 1, characterized in that: A sealing assembly (90) is provided at the opening of the cooling channel (211), the sealing assembly (90) comprising a sealing plug (91) and a sealing ring (92), the sealing plug (91) having an escape hole for the cooling pipe (63) to pass through, and the sealing ring (92) being sleeved on the outer surface of the sealing plug (91).

8. The machine tool according to any one of claims 1 to 7, characterized in that The cooling pipe (63) comprises a cooling copper pipe or a cooling aluminum pipe; and / or, The guide sleeve (80) sleeved on the outer surface of the cooling pipe (63) comprises a guide copper sleeve or a guide aluminum sleeve; and / or, The lead screw body (21) is covered with a protective cover (212).

9. The machine tool according to any one of claims 1 to 7, characterized in that The driving mechanism (30) comprises: A driving motor (31), wherein the driving motor (31) is arranged on the base (10); A pulley assembly (32), wherein the pulley assembly (32) is arranged on the base (10) and is drivingly connected to the drive motor (31), the pulley assembly (32) comprises a first pulley (321), a second pulley (322) and a synchronous belt (323), wherein the first pulley (321) is connected to the output shaft of the drive motor (31), the second pulley (322) is sleeved on the outer periphery of the lead screw body (21) and is connected to the rotating nut (22), the synchronous belt (323) is sleeved on the outer surfaces of the first pulley (321) and the second pulley (322) and is located between the first pulley (321) and the second pulley (322), and the second pulley (322) rotates under the drive of the first pulley (321) and the synchronous belt (323).

10. The machine tool according to any one of claims 1 to 7, characterized in that The machine tool further comprises a balancing hydraulic cylinder (11), wherein the balancing hydraulic cylinder (11) is arranged on the base (10) and connected to the spindle box (40), and the lead screw body (21) and the balancing hydraulic cylinder (11) synchronously drive the spindle box (40) to reciprocate along the first direction.

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