Machine tool body and machine tool
By adopting a moving crossbeam design with a double support structure in the machine tool body, the stability and accuracy problems of traditional machine tool bodies when subjected to unbalanced loads are solved, realizing high-precision and high-efficiency multi-functional machining capabilities.
Patent Information
- Application Number
- CN202423178077.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Traditional machine tool bodies are deficient in terms of motion coordination between components and multi-functional integration, making it difficult to meet the comprehensive requirements of modern machining for high precision, high efficiency, and multi-functional processing. In particular, the crossbeam structure cannot withstand large unbalanced loads, causing the machine tool body to fail to provide stable support for the crossbeam, slide saddle, and spindle box, thus affecting machining accuracy and efficiency.
The movable crossbeam design, which adopts a dual-support structure, sets front and rear support sections at both ends of the movable crossbeam and positions the center of gravity between specific vertical planes. Combined with the cooperation of vertical guide rails and lead screws, it achieves stable support and precise movement of the movable crossbeam, saddle, and spindle box.
The increased load-bearing capacity and overall stability of the moving crossbeam enhance the movement flexibility and versatility of the machine tool body, adapting to diverse machining tasks and improving machining accuracy and efficiency.
Smart Images
Figure CN223656493U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of machine tool, more specifically, relate to a machine tool body and machine tool. BACKGROUND
[0002] In the field of machine tool manufacturing, the structural design of machine tool body plays a key role in the overall performance of the machine tool. However, the traditional machine tool body has deficiencies in the coordination of movement between components and multifunctional integration, making it difficult to meet the comprehensive needs of modern mechanical processing for high precision, high efficiency and multifunctional processing.
[0003] For example, in some cases where multi-axis linkage processing or the installation of multiple processing accessories is required, the cross beam structure of the machine tool body often has deficiencies. The layout and connection method of the cross beam are relatively conventional. When dealing with complex processing tasks and multiple components with different functions need to be arranged on the cross beam, the weight distribution is difficult to be uniform due to the lack of reasonable structural design, resulting in the cross beam being unable to bear a large amount of unbalanced load and the machine tool body being unable to provide stable support for the movement of the cross beam, slide saddle and spindle box. This not only easily causes the cross beam to deform and the machine tool body to tilt, but also directly affects the processing precision and efficiency of the machine tool. SUMMARY
[0004] The utility model aims at providing a novel machine tool body and machine tool, aiming at solving the problem that the cross beam of the traditional machine tool body cannot bear a large amount of unbalanced load and the machine tool body cannot provide stable support for the movement of the cross beam, slide saddle and spindle box, thereby seriously affecting the processing efficiency and precision of the machine tool.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] On the one hand, the utility model provides a kind of machine tool body, including base, first column and second column being arranged in the rear portion of base, fixed cross beam being erected on the upper end of first column and second column, mobile cross beam is also transversely arranged between the first column and the second column, slide saddle is slidably arranged above the mobile cross beam, spindle box is slidably arranged above the slide saddle, first vertical guide rail surface and second vertical guide rail surface are respectively arranged in the rear of first column and second column, first installation surface and second installation surface corresponding to the first vertical guide rail surface and the second vertical guide rail surface are arranged on the front side of the two ends of mobile cross beam, the first support portion located in the front side of the first installation surface and the second installation surface and the second support portion located in the rear side of the first installation surface and the second installation surface are included in the mobile cross beam, the first support portion is arranged between the first column and the second column, the second support portion is arranged behind the first column and the second column, and the slide saddle is slidably supported on the first support portion and the second support portion.
[0007] In some embodiments, the front side of the two ends of the moving cross beam is further provided with a nut seat mounting seat, the rear of the first column and the second column is further respectively provided with a first vertical screw rod and a second vertical screw rod, and the nut seat mounting seat is connected with the first vertical screw rod and the second vertical screw rod to drive the moving cross beam to move in the up-down direction.
[0008] In some embodiments, the first vertical guide rail is arranged on the first vertical guide rail surface, the second vertical guide rail is arranged on the second vertical guide rail surface, the first mounting surface and the second mounting surface are matched with the first vertical guide rail and the second vertical guide rail through the sliding blocks, and the gravity center of the moving cross beam, the sliding saddle and the spindle box is located between the vertical plane defined by the first vertical guide rail and the second vertical guide rail and the vertical plane defined by the first vertical screw rod and the second vertical screw rod, or between the vertical plane defined by the first vertical guide rail surface and the second vertical guide rail surface and the vertical plane defined by the first vertical screw rod and the second vertical screw rod.
[0009] In some embodiments, the first mounting surface and the second mounting surface of the moving cross beam are respectively provided with guide rail mounting seats for fixing the sliding blocks.
[0010] In some embodiments, the upper part of the moving cross beam is provided with a groove and a transverse guide rail in the transverse direction, the groove is used for arranging a transverse screw rod, the sliding saddle is provided with a nut matched with the transverse screw rod, and the sliding saddle is slidably connected with the moving cross beam through the transverse guide rail.
[0011] In some embodiments, the upper part of the two ends of the moving cross beam is respectively provided with a trapezoidal plate, and the trapezoidal plate is connected with the first mounting surface and the second mounting surface perpendicularly.
[0012] In some embodiments, the lower side of the two ends of the moving cross beam is respectively provided with two protruding parts extending downward, the two protruding parts are connected with the first mounting surface and the second mounting surface respectively, and the two protruding parts have a predetermined distance.
[0013] In some embodiments, the protruding part comprises a front inclined surface and a rear inclined surface in the vertical direction, and the front inclined surface and the rear inclined surface are close to each other from the upper part to the lower part of the protruding part.
[0014] In some embodiments, the inside of the moving cross beam is formed as a hollow mesh structure and has longitudinal and transverse intersecting reinforcing ribs.
[0015] In another aspect, the utility model provides a machine tool which comprises the machine tool body, the base is provided with a rotary table, the spindle box is further provided with a spindle, and the working end of the spindle faces the rotary table.
[0016] The utility model discloses the beneficial effect lies in: the utility model discloses a front and rear double support part structure is used on the mobile crossbeam, and the first installation surface and the second installation surface are arranged to the front side of both ends, greatly enhance the bearing capacity of mobile crossbeam, the gravity of mobile crossbeam, slide saddle and main shaft box whole is arranged between the specific vertical plane simultaneously, further enhance the overall stability of machine tool body, and the overall movement flexibility and multifunctionality of machine tool body are improved, to adapt to the diversified mechanical processing task. BRIEF DESCRIPTION OF DRAWINGS
[0017] The utility model is further illustrated below in connection with the drawings and examples, and in the drawings:
[0018] Figure 1 It is the structure schematic diagram of machine tool body of the utility model;
[0019] Figure 2 It is the rear view of machine tool body of the utility model;
[0020] Figure 3 It is the side view of mobile crossbeam of the utility model;
[0021] Figure 4 It is the structure schematic diagram of mobile crossbeam of the utility model;
[0022] Figure 5 It is another direction structure schematic diagram of mobile crossbeam of the utility model;
[0023] Figure 6 It is still another direction structure schematic diagram of mobile crossbeam of the utility model.
[0024] Wherein the reference signs are:
[0025] 1-base, 2-first stand, 3-second stand, 4-fixed cross, 5-mobile crossbeam, 6-slide saddle, 7-main shaft box, 8-screw nut seat mounting seat
[0026] 21-first vertical guide rail surface, 22-first vertical screw rod, 31-second vertical guide rail surface, 32-second vertical screw rod, 51-first installation surface, 52-second installation surface, 53-first support part, 54-second support part, 55-guide rail mounting seat, 56-groove, 57-horizontal guide rail, 58-horizontal screw rod, 59-protruding part
[0027] 211-first vertical guide rail, 311-second vertical guide rail, 561-horizontal screw rod, 591-front inclined surface, 592-rear inclined surface DETAILED DESCRIPTION
[0028] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.
[0029] It should be noted that, in the description of the present application, the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0030] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.
[0031] In addition, the terms "first", "second" and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features.
[0032] In the description of the present application, it should be noted that, unless otherwise specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection or movable connection, or detachable connection or non-detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements, indirect communication or mutual action relationship of two elements.
[0033] The following disclosure provides many different embodiments or examples for implementing the different aspects of the present application.
[0034] As Figures 1 to 6The utility model provides a machine tool body, including base 1, first column 2 and second column 3 of setting in the rear part of base 1, fixed crosspiece 4 of erecting in the upper end of first column 2 and second column 3, still be provided with the moving crossbeam 5 of spanning between first column 2 and second column 3, the slide saddle 6 of slidingly being provided with above moving crossbeam 5, the slide saddle 6 of slidingly being provided with above main shaft box 7, it is characterized in that, the rear of first column 2 and second column 3 is provided with first vertical guide rail surface 21 and second vertical guide rail surface 31 respectively, the front side of both ends of moving crossbeam 5 is provided with the first installation surface 51 and the second installation surface 52 corresponding with first vertical guide rail surface 21 and second vertical guide rail surface 31, and moving crossbeam 5 includes the first support part 53 of being located in the front side of first installation surface 51 and second installation surface 52 and the second support part 54 of being located in the rear side of first installation surface 51 and second installation surface 52, first support part 53 is set between first column 2 and second column 3, and second support part 54 is set behind first column 2 and second column 3, and the slide saddle 6 is slidably supported on first support part 53 and second support part 54.
[0035] Wherein, base 1, first column 2 and second column 3 of setting in the rear part of base 1 and fixed crosspiece 4 of erecting in the upper end of first column 2 and second column 3 are the main basic framework of machine tool body, moving crossbeam 5 is provided with installation and moves the basis of spanning between first column 2 and second column 3, main shaft box 7 is slidably arranged above slide saddle 6, main shaft box 7 and moving crossbeam 5, slide saddle 6 are slidably fitted together, realize processing demand.
[0036] When the slide 6 and the components of the spindle box 7 mounted on the slide 6 perform various types of machining movements, gravity, cutting force and other forces are generated. The first support part 53 can directly bear part of the load generated by the slide 6 and the components of the slide 6 and the spindle box 7 mounted on the slide 6, and can effectively transmit this part of the force to the first column 2 and the second column 3 on both sides. The second support part 54 cooperates with the first support part 53 to bear the remaining load. In particular, when dealing with some complex machining conditions, such as asymmetric cutting force generated during machining or machining accessories with uneven weight distribution mounted on the slide 6 and the spindle box 7, the second support part 54 can share the force acting in the rear direction, then transmit the force to the rear of the column, and further disperse and bear the force through the frame structure of the entire machine tool body. This double support part structure widens the stress range of the moving cross beam 5, changes the limitation of the traditional cross beam supported by the front part or a single part, makes the overall stress of the moving cross beam 5 more balanced and reasonable, and effectively improves the stability and machining precision of the entire machine tool body. In addition, the slide 6 is slidingly supported on the first support part 53 and the second support part 54, so that the slide 6 slides on the moving cross beam 5 more stably and reliably. The double support part structure of the first support part 53 and the second support part 54 provides multi-directional support for the slide 6, ensures that the slide 6 has a stable foundation during the process of driving the spindle box 7 to move horizontally and cooperating with the moving cross beam 5 to move vertically, and helps to improve the movement precision and stability of the entire machine tool body during machining, laying a foundation for subsequent high-precision machining.
[0037] In some embodiments, as shown in Figure 2 and Figure 4 , the front side of both ends of the moving cross beam 5 is also provided with a nut seat mounting seat 8, and the rear of the first column 2 and the second column 3 is also respectively provided with a first vertical screw 22 and a second vertical screw 32. The nut seat mounting seat 8 is connected with the first vertical screw 22 and the second vertical screw 32 to drive the moving cross beam 5 to move in the up-down direction. In actual machining, when it is necessary to adjust the height position of the spindle box 7 in order to machine different height parts of the workpiece, the synchronous rotation of the first vertical screw 22 and the second vertical screw 32 can be controlled to accurately and stably realize the up-down movement of the moving cross beam 5, thereby changing the vertical position of the spindle box 7 and realizing efficient cooperation between components to meet complex machining requirements.
[0038] In some embodiments, as shown in Figure 2 , Figure 3 and Figure 4As shown, the first vertical guide rail surface 21 is provided with a first vertical guide rail 211, and the second vertical guide rail surface 31 is provided with a second vertical guide rail 311. The first mounting surface 51 and the second mounting surface 52 cooperate with the first vertical guide rail 211 and the second vertical guide rail 311 through the sliding blocks to provide precise guidance for the movement of the moving cross beam 5 in the vertical direction, so that the moving cross beam 5 avoids deflection, shaking and other situations during vertical movement, and improves the accuracy and stability of movement. On the one hand, the sliding block can smoothly slide along the guide rail, reducing the friction during movement, making the vertical movement of the moving cross beam 5 more stable and smooth; on the other hand, the sliding block closely fits the guide rail, strictly following the movement track determined by the guide rail, and constraining the movement of the moving cross beam 5 on the predetermined vertical straight line, ensuring that the moving cross beam 5 can accurately move up and down under any working condition, and providing strong support for the accurate control of the height position in the subsequent machining operation.
[0039] At the same time, the center of gravity of the moving cross beam 5, the sliding saddle 6 and the spindle box 7 as a whole is located between the vertical plane defined by the first vertical guide rail 211 and the second vertical guide rail 311 and the vertical plane defined by the first vertical lead screw 22 and the second vertical lead screw 32, or between the vertical plane defined by the first vertical guide rail surface 21 and the second vertical guide rail surface 31 and the vertical plane defined by the first vertical lead screw 22 and the second vertical lead screw 32. When the machine tool is working, especially when the moving cross beam 5 moves vertically and external forces such as cutting forces are generated during subsequent machining, if the center of gravity deviates from the reasonable range, unbalanced moments are easily generated, which further leads to instability phenomena such as inclination and vibration of the machine tool body, seriously affecting the machining accuracy. By controlling the overall center of gravity between the above-mentioned specific vertical planes, the forces acting on each component can be relatively evenly distributed within the structure, reducing unstable factors caused by the center of gravity. And the reasonable center of gravity position makes the first vertical guide rail 211 and the second vertical guide rail 311, the first vertical lead screw 22 and the second vertical lead screw 32 can more effectively cooperate to play a supporting role. The first vertical guide rail 211 and the second vertical guide rail 311 provide precise guidance for the vertical movement of the moving cross beam 5, and the first vertical lead screw 22 and the second vertical lead screw 32 drive the moving cross beam 5 to move up and down. The reasonable center of gravity makes the moving cross beam 5 and the related components move smoothly along the first vertical guide rail 211 and the second vertical guide rail 311 during movement, and does not generate additional eccentric moments on the first vertical lead screw 22 and the second vertical lead screw 32, reducing the uneven force on the first vertical lead screw 22 and the second vertical lead screw 32 and other components, prolonging their service life, and further strengthening the stability of the entire machine tool body structure in the vertical dimension.
[0040] In some embodiments, as Figure 2 and Figure 4As shown, the first mounting surface 51 and the second mounting surface 52 of the moving cross beam 5 are respectively provided with a guide rail mounting seat 55 for fixing the sliding block. During the operation of the machine tool, especially when the moving cross beam 5 performs vertical movement and the sliding saddle 6 performs horizontal movement on the moving cross beam 5, various forces will act on the sliding block. The guide rail mounting seat 55 can better withstand these forces, reduce the loosening and displacement of the sliding block due to stress, and make the sliding block stably and tightly cooperate with the first vertical guide rail 211 and the second vertical guide rail 311, so that the moving cross beam 5 performs accurate and stable vertical movement along the first vertical guide rail 211 and the second vertical guide rail 311.
[0041] In some embodiments, as shown in Figure 5 As shown, the upper part of the moving cross beam 5 is provided with a groove 56 and a horizontal guide rail 57 in the horizontal direction, and the horizontal screw rod 561 is arranged in the groove 56 to provide a suitable mounting space for the horizontal screw rod 561, avoid direct interference between the horizontal screw rod 561 and other components, and optimize the overall layout and use safety of the machine tool body. The sliding saddle 6 is provided with a nut matched with the horizontal screw rod 561, and the sliding saddle 6 is slidably connected with the moving cross beam 5 through the horizontal guide rail 57. When the horizontal screw rod 561 rotates, the nut will move linearly along the axial direction of the horizontal screw rod 561. Since the nut is fixedly installed on the sliding saddle 6, the linear movement of the nut will drive the sliding saddle 6 to move along the axial direction of the horizontal screw rod 561, thereby realizing the horizontal sliding of the sliding saddle 6 on the moving cross beam 5. At the same time, the horizontal guide rail 57 provides accurate guidance for the horizontal movement of the sliding saddle 6, limits the movement of the sliding saddle 6 along the straight line direction in which it is laid, and enhances the stability and reliability of the horizontal movement of the sliding saddle 6.
[0042] In some embodiments, as shown in Figure 4 and Figure 6As shown, the upper part of the two ends of the moving cross beam 5 is respectively provided with a trapezoidal plate 58, which is respectively connected with the first mounting surface 51 and the second mounting surface 52 vertically. The moving cross beam 5 needs to bear various forces during the operation of the machine tool, especially when the slide 6 moves horizontally and the moving cross beam 5 moves vertically, the two end parts bear a large stress concentration. The trapezoidal plate 58 is connected with the first mounting surface 51 and the second mounting surface 52 vertically, which supports the end part of the moving cross beam 5 with a reinforcing rib, can provide additional support force for the moving cross beam 5 in different directions, effectively enhance the structural strength of the end part area, avoid deformation, cracking and other damage of the end part during the force process, so that the overall rigidity of the moving cross beam 5 is improved. At the same time, the trapezoidal plate 58 is installed on the upper part of the two ends of the moving cross beam 5 and connected with the first mounting surface 51 and the second mounting surface 52 vertically, when the slide 6 moves horizontally along the moving cross beam 5, the trapezoidal plate 58 can also play a limiting role, avoid the slide 6 from falling off the moving cross beam 5 or colliding with other parts of the machine tool body and other accidents, to ensure the safety and stability of the operation of the machine tool body.
[0043] In some embodiments, as Figure 4 As shown, the lower side of the two ends of the moving cross beam 5 is respectively provided with two protruding parts 59 extending downward, the two protruding parts 59 are respectively connected with the first mounting surface 51 and the second mounting surface 52, and the two protruding parts 59 have a predetermined distance. The protruding part 59 makes the center of gravity of the moving cross beam 5 lower, reduces the height of the center of gravity of the whole moving cross beam, during the operation of the machine tool, especially when the moving cross beam 5 moves vertically or is disturbed by external forces such as cutting force during machining, the lower center of gravity can make the moving cross beam 5 less likely to be unstable such as tilting and shaking. At the same time, the protruding part 59 can make the center of gravity of the moving cross beam 5 more evenly distributed in the horizontal direction, enhancing the stability of the moving cross beam 5 in the horizontal direction. When the slide 6 moves horizontally on the moving cross beam 5, no matter where the slide 6 is located or how the force in the horizontal direction changes during machining, the moving cross beam 5 can rely on the reasonable horizontal distribution of the center of gravity to avoid the problem of overall tilting and deviation caused by excessive force on one side, so that the structure of the machine tool body in the horizontal dimension is stable, which helps to maintain the stability of the whole machining process and reduce the machining error caused by horizontal instability.
[0044] In some embodiments, as Figure 4 and Figure 6As shown, the protrusion 59 includes a front inclined surface 591 and a rear inclined surface 592 in the vertical direction, and the front inclined surface 591 and the rear inclined surface 592 are closer to each other from the upper part to the lower part of the protrusion 59. During the operation of the machine tool body, a reasonable space layout is required between the components to ensure normal movement and operation, and the design of the front inclined surface 591 and the rear inclined surface 592 of the protrusion 59 helps to avoid interference with other components. For example, when the moving beam 5 moves vertically or the slide 6 moves laterally on the moving beam 5, the inclined surface can provide a certain space avoidance to prevent the protrusion 59 from colliding or rubbing with the surrounding components, so that the smoothness of the operation of the machine tool body and the integrity of the movement trajectory of each component are improved, and the reliability and safety of the machine tool body as a whole are improved.
[0045] In some embodiments, the moving beam 5 is internally formed as a hollow network structure with crosswise arranged reinforcing ribs, the design of the hollow network structure ensures that the moving beam 5 has sufficient structural strength while effectively controlling its own weight, which can effectively reduce the load requirement, and the crosswise arranged reinforcing ribs can make the moving beam 5 maintain a more stable structural state when stressed. During processing, whether it is the impact of cutting force or the interference factors such as vibration caused by component movement, the reinforcing ribs can work together with the hollow network structure to resist these external forces and inhibit the moving beam 5 from shaking, tilting and other unstable phenomena, so that it is in a stable working state, providing a solid foundation for the precise movement of the slide 6 and the spindle box 7, ensuring the processing accuracy and reducing the processing errors caused by unstable structure.
[0046] The utility model also provides a machine tool on the other side still provides a kind of machine tool body, including the machine tool body of any one described above, base 1 is provided with rotary table, spindle box 7 is also provided with spindle, and the working end of spindle faces rotary table. Since the machine tool has the machine tool body described above, it also has the effects of the machine tool body, which will not be repeated here.
[0047] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.
Claims
1. A machine tool body, comprising a base (1), a first column (2) and a second column (3) disposed at the rear of the base (1), and a fixed crossbeam (4) mounted on the upper ends of the first column (2) and the second column (3), wherein a movable crossbeam (5) is also provided across the first column (2) and the second column (3), a sliding saddle (6) is slidably disposed above the movable crossbeam (5), and a spindle box (7) is slidably disposed above the sliding saddle (6), characterized in that, The first column (2) and the second column (3) are respectively provided with a first vertical guide rail surface (21) and a second vertical guide rail surface (31) at the rear. The front sides of both ends of the movable crossbeam (5) are provided with a first mounting surface (51) and a second mounting surface (52) corresponding to the first vertical guide rail surface (21) and the second vertical guide rail surface (31). The movable crossbeam (5) includes a first support part (53) located on the front side of the first mounting surface (51) and the second mounting surface (52) and a second support part (54) located on the rear side of the first mounting surface (51) and the second mounting surface (52). The first support part (53) is located between the first column (2) and the second column (3), and the second support part (54) is located behind the first column (2) and the second column (3). The sliding saddle (6) is slidably supported on the first support part (53) and the second support part (54).
2. The machine tool body according to claim 1, characterized in that, The front sides of both ends of the movable crossbeam (5) are provided with screw nut mounting bases (8), and the rear of the first column (2) and the second column (3) are respectively provided with a first vertical screw rod (22) and a second vertical screw rod (32). The screw nut mounting bases (8) are connected to the first vertical screw rod (22) and the second vertical screw rod (32) to drive the movable crossbeam (5) to move in the up and down direction.
3. The machine tool body according to claim 2, characterized in that, The first vertical guide rail (211) is provided on the first vertical guide rail surface (21), and the second vertical guide rail surface (31) is provided on the second vertical guide rail surface (31). The first mounting surface (51) and the second mounting surface (52) cooperate with the first vertical guide rail (211) and the second vertical guide rail (311) through a slider. The center of gravity of the entire moving beam (5), sliding saddle (6) and spindle box (7) is located between the vertical plane defined by the first vertical guide rail (211) and the second vertical guide rail (311) and the vertical plane defined by the first vertical screw (22) and the second vertical screw (32), or between the vertical plane defined by the first vertical guide rail surface (21) and the second vertical guide rail surface (31) and the vertical plane defined by the first vertical screw (22) and the second vertical screw (32).
4. The machine tool body according to claim 3, characterized in that, Guide rail mounting seats (55) are respectively provided on the first mounting surface (51) and the second mounting surface (52) of the movable crossbeam (5), and the guide rail mounting seats (55) are used to fix the slider.
5. The machine tool body according to any one of claims 1-4, characterized in that, The upper part of the movable crossbeam (5) is provided with a groove (56) and a transverse guide rail (57) along the transverse direction. The groove (56) is used to set a transverse lead screw (561). The slide saddle (6) is provided with a nut that cooperates with the transverse lead screw (561). The slide saddle (6) is slidably connected to the movable crossbeam (5) through the transverse guide rail (57).
6. The machine tool body according to claim 5, characterized in that, The upper parts of both ends of the movable crossbeam (5) are respectively provided with trapezoidal plates (58), and the trapezoidal plates (58) are perpendicularly connected to the first mounting surface (51) and the second mounting surface (52).
7. The machine tool body according to any one of claims 1-4, characterized in that, The lower sides of both ends of the movable crossbeam (5) are respectively provided with two downwardly extending protrusions (59), the two protrusions (59) are respectively connected to the first mounting surface (51) and the second mounting surface (52), and there is a predetermined distance between the two protrusions (59).
8. The machine tool body according to claim 7, characterized in that, The protrusion (59) includes a front inclined surface (591) and a rear inclined surface (592) in the vertical direction. From the upper part to the lower part of the protrusion (59), the front inclined surface (591) and the rear inclined surface (592) approach each other.
9. The machine tool body according to any one of claims 1-4, characterized in that, The interior of the movable crossbeam (5) forms a hollow mesh structure and has intersecting reinforcing ribs.
10. A machine tool, characterized in that, The machine tool body includes any one of claims 1 to 9, wherein a turntable is provided on the base (1), and a spindle is also provided on the spindle box (7), with the working end of the spindle facing the turntable.