Driving device and gantry machining center with same

Abstract

The utility model provides a kind of driving device and gantry machining center with it, comprising: slide saddle;Ram, movably set on slide saddle, the moving direction of ram is same with the extension direction of ram;Linear motor assembly, including rotor and stator, rotor is fixedly set on slide saddle, stator is fixedly set on ram, the extension direction of stator is same with the moving direction of ram, rotor is driven connection by electromagnetic force and stator, to make ram move relative to slide saddle. Through the technical scheme provided in the present application, the problem that Z-axis stroke and machining accuracy cannot be considered simultaneously in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of machining center technology, and more specifically, to a drive device and a gantry machining center having the same. Background Technology

[0002] The twin-spindle gantry machining center is a high-end CNC machine tool integrating high rigidity, high precision, and high efficiency. With its high-rigidity structure, multi-axis collaborative control, and intelligent system, it has become a core piece of equipment in high-end manufacturing. It is suitable for the efficient machining of large and complex parts and is increasingly being applied to the high-torque cutting of integrated die-cast automotive parts.

[0003] The Z-axis drive mechanism of a dual-spindle gantry machining center is a core component for achieving high-precision and high-efficiency machining in high-end CNC machine tools. However, Z-axis travel and casting rigidity are two important parameters that are difficult to balance simultaneously. Existing gantry machining centers include a ram, a saddle, and a linear motor. The ram is movably mounted on the saddle and is used to connect to the machining spindle. The linear motor is located between the ram and the saddle and is used to drive the ram to move relative to the saddle.

[0004] Traditional linear motors are installed by placing the mover on a slide and the stator on a saddle. The mover and stator are connected by a magnetic drive, allowing the mover to move along the stator, which in turn moves the slide along the saddle. If the Z-axis travel needs to be increased, the stator length must be increased, and the saddle on which the stator is mounted must also be lengthened accordingly. This design results in an excessively long saddle, leading to reduced support rigidity and decreased machining accuracy. Furthermore, as the main support structure, increasing the length of the saddle significantly increases structural weight, affecting the Z-axis drive speed and consequently impacting machining efficiency. Utility Model Content

[0005] This invention provides a drive device and a gantry machining center having the same, to solve the problem in the prior art that it is difficult to simultaneously achieve both Z-axis travel and machining accuracy.

[0006] According to one aspect of the present invention, a driving device is provided, comprising: a slide saddle; a slide ram movably disposed on the slide saddle, the sliding ram moving in the same direction as extending in the same direction; and a linear motor assembly comprising a mover and a stator, the mover being fixedly disposed on the slide saddle and the stator being fixedly disposed on the slide ram, the stator extending in the same direction as moving in the slide ram, the mover being driven to the stator by electromagnetic force to cause the slide ram to move relative to the slide saddle.

[0007] Furthermore, the drive device also includes: a mounting plate, which is disposed on the side of the slide saddle facing the slide block, the mounting plate is located between the slide saddle and the mover, the mounting plate has a first mounting surface and a second mounting surface disposed opposite to each other, the first mounting surface is adapted to the mover, the mover is fixed on the first mounting surface, and the second mounting surface is fixedly connected to the slide saddle.

[0008] Furthermore, the mounting plate has multiple first mounting holes and multiple second mounting holes, the first mounting holes being used to connect the mover and the multiple second mounting holes being used to connect the slide saddle.

[0009] Furthermore, the drive unit also includes a guide structure disposed between the saddle and the ram, which is used to guide the movement of the ram.

[0010] Furthermore, the guiding structure includes: a guide rail, which is disposed on both sides of the slide and extends along the moving direction of the slide; and a guide block, which is disposed on both sides of the slide and cooperates with the guide rail to guide the slide.

[0011] Furthermore, the drive unit also includes a limiting structure, which is disposed between the ram and the saddle, and is used to limit the travel of the ram relative to the saddle.

[0012] Furthermore, the limiting structure includes a first bracket, which is disposed on the top of the slide block. The first bracket includes a first connecting section and a first limiting section. The first connecting section is connected to the slide block, and the first limiting section is connected to the first connecting section. The first limiting section extends toward the slide saddle. When the slide block moves relative to the slide saddle to the lower limit position, the first limiting section abuts against the top of the slide saddle and is limited.

[0013] Furthermore, the limiting structure also includes a second bracket and a limiting part. The second bracket is disposed on the top of the slide saddle, and the limiting part is disposed on the side wall of the slide block. The second bracket includes a second connecting section and a second limiting section. The second connecting section is connected to the slide saddle, and the second limiting section is connected to the second connecting section. The second limiting section extends in the direction close to the slide block and is located on the side of the slide block. When the slide block moves relative to the slide saddle to the upper limit position, the second limiting section and the limiting part abut against and limit the movement.

[0014] Furthermore, the multiple first mounting holes are distributed in two rows, with the two rows of first mounting holes located on both sides of the mounting plate. Each row of first mounting holes is spaced apart along the moving direction of the slide block, and the multiple second mounting holes are located between the two rows of first mounting holes.

[0015] According to one aspect of the present invention, a gantry machining center is provided, which includes the aforementioned drive device.

[0016] By applying the technical solution of this utility model, the mover of the linear motor is fixed to the slide saddle, and the stator is fixed to the ram. Compared with the traditional linear motor installation method in the prior art where the stator is placed on the slide saddle and the mover on the ram, this application directly mounts the stator on the movable ram. This eliminates the need to occupy the installation space of the slide saddle, thus avoiding the need to extend the dimensions of the slide saddle to accommodate the long stator. Furthermore, since the ram itself is relatively long, its space can be used to fix the stator, so the dimensions of the ram do not need to be extended. In this way, the slide saddle only needs to provide a mounting position for a small-sized mover, thereby solving the problem of increasing the length of the slide saddle due to the increase in stator length. This further avoids the problem of reduced saddle rigidity caused by increasing the size of the slide saddle, thereby improving machining accuracy. Moreover, compared with traditional improvements, the above structural improvement reduces the weight of the slide saddle while maintaining the same stator length, increasing the speed of the Z-axis drive and thus improving machining efficiency. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the drive device provided by this utility model is shown;

[0019] Figure 2 A cross-sectional view of the drive device of this utility model is shown;

[0020] Figure 3 This invention provides a schematic diagram of the drive device from another angle.

[0021] Figure 4 It shows Figure 1 Schematic diagram of the mounting plate in the middle;

[0022] Figure 5 A schematic diagram of the gantry machining center provided by this utility model is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Saddle slide;

[0025] 20. Slide pillow;

[0026] 30. Linear motor;

[0027] 31. Moving piece; 32. Stator;

[0028] 40. Mounting plate;

[0029] 41. First mounting surface; 42. Second mounting surface;

[0030] 43. First mounting hole; 44. Second mounting hole;

[0031] 50. Guiding structure;

[0032] 51. Guide rail; 52. Guide block;

[0033] 60. Limiting structure;

[0034] 61. First support; 611. First connecting section; 612. First limiting section;

[0035] 62. Second support; 621. Second connecting section; 622. Second limiting section;

[0036] 70. Gantry machining center. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0038] like Figures 1 to 3 As shown, this embodiment of the present invention provides a driving device including a slide saddle 10, a slide ram 20, and a linear motor 30. Specifically, the slide ram 20 is movably mounted on the slide saddle 10, and the moving direction of the slide ram 20 is the same as the extending direction of the slide ram 20. The linear motor 30 assembly includes a mover 31 and a stator 32. The mover 31 is fixedly mounted on the slide saddle 10, and the stator 32 is fixedly mounted on the slide ram 20. The extending direction of the stator 32 is the same as the moving direction of the slide ram 20. The mover 31 is driven to the stator 32 by electromagnetic force, thereby causing the slide ram 20 to move relative to the slide saddle 10.

[0039] By applying the technical solution of this utility model, the mover of the linear motor is fixed to the slide saddle, and the stator is fixed to the ram. Compared with the traditional linear motor installation method in the prior art where the stator is placed on the slide saddle and the mover on the ram, this application directly mounts the stator on the movable ram. This eliminates the need to occupy the installation space of the slide saddle, thus avoiding the need to extend the dimensions of the slide saddle to accommodate the long stator. Furthermore, since the ram itself is relatively long, its space can be used to fix the stator, so the dimensions of the ram do not need to be extended. In this way, the slide saddle only needs to provide a mounting position for a small-sized mover, thereby solving the problem of increasing the length of the slide saddle due to the increase in stator length. This further avoids the problem of reduced saddle rigidity caused by increasing the size of the slide saddle, thereby improving machining accuracy. Moreover, compared with traditional improvements, the above structural improvement reduces the weight of the slide saddle while maintaining the same stator length, increasing the speed of the Z-axis drive and thus improving machining efficiency.

[0040] In this application, the mover 31 is fixed to the slide saddle 10 using the aforementioned structure, and the stator 32, as a moving component, drives the slide ram 20 to achieve Z-axis movement. Since the relatively moving component is still the slide ram 20, only the motor driving the slide ram 20 has changed from the mover 31 to the stator 32, and the component fixed on the slide saddle 10 has changed from the stator 32 to the mover 31, the length of the slide saddle 10 is reduced in this application while maintaining the same stator 32 length. This improves the rigidity of the Z-axis moving component and reduces its weight without affecting the Z-axis travel. This solves the problem of simultaneously achieving Z-axis travel and casting rigidity in traditional dual-spindle gantry machining centers. Furthermore, it reduces vibration during movement and improves the dimensional accuracy, shape accuracy, and surface finish of the machined workpiece.

[0041] In this application, the mover 31 can be directly mounted on the surface of the slide saddle 10, or it can be mounted on the slide saddle 10 via a transition piece. In this embodiment, the drive device also includes a mounting plate 40. Specifically, the mounting plate 40 is disposed on the side of the slide saddle 10 facing the slide bolster 20. The mounting plate 40 is located between the slide saddle 10 and the mover 31. The mounting plate 40 has a first mounting surface 41 and a second mounting surface 42 disposed opposite to each other. The first mounting surface 41 is adapted to the mover 31, and the mover 31 is fixed on the first mounting surface 41. The second mounting surface is fixedly connected to the slide saddle 10.

[0042] like Figure 4As shown, through the above structure, a mounting plate 40 with a first mounting surface 41 and a second mounting surface 42 is provided between the sliding saddle 10 and the mover 31. The mounting plate 40 serves as a transitional connector, improving the adaptability and versatility between components. It allows movers 31 of different specifications and sizes to connect to the first mounting surface 41 of the mounting plate 40, and the sliding saddle 10 to connect to the second mounting surface 42, thereby achieving reliable fixation between the mover 31 and the sliding saddle 10 and reducing manufacturing and assembly difficulties. Secondly, the double-sided design of the mounting plate 40 enhances the connection rigidity and stability. It itself acts as a reinforcing structure to distribute the load, reducing stress concentration that may occur when the sliding saddle 10 and the mover 31 are directly connected, as well as wear that occurs during daily operation, thereby improving the reliability of power transmission under high-load processing. In addition, the mounting plate 40 also serves as an error compensation and vibration isolation device, absorbing and compensating for manufacturing errors and alignment deviations between the mounting interfaces of the slide saddle 10 and the mover 31, thereby improving motion stability and machining accuracy. Finally, this modular design simplifies the maintenance and replacement process. If the mover 31 needs to be upgraded or replaced, only the mounting plate 40 needs to be adjusted or replaced instead of the entire slide saddle 10, thus reducing the cost and time of later maintenance.

[0043] Specifically, in this embodiment, the mounting plate 40 undergoes high-precision grinding, which improves the flatness and parallelism of the first mounting surface 41 and the second mounting surface, reduces the assembly gap between the mover 31, the mounting plate 40, and the slide saddle 10, reduces deformation and vibration of the machine body during high-speed acceleration and deceleration, and further improves the service life and operational stability and reliability of the machine body. Preferably, in this embodiment, the mounting plate 40 is made of No. 45 steel plate.

[0044] It should also be noted that the mounting plate 40 has multiple first mounting holes 43 and multiple second mounting holes 44. The first mounting holes 43 are used to connect the mover 31, and the multiple second mounting holes 44 are used to adapt to different sliding saddles 10. Optionally, the first mounting holes 43 are symmetrically distributed on both sides of the mounting plate 40 for connecting the mover 31, while the second mounting holes 44 are concentrated in the central area of ​​the mounting plate 40 for adapting to different specifications of sliding saddles 10. This spatially separated layout design not only ensures the symmetry and force balance of the mover 31 installation, but also provides a flexible central positioning connection point for different models of sliding saddles 10. Each mounting hole can adopt a variety of hole types, such as threaded holes, countersunk holes, and smooth holes, and can present different quantities and distribution patterns in different adaptation versions. For example, for heavy-duty movers 31, the number and diameter of the first mounting holes 43 on both sides can be increased, and for slide saddles 10 of different sizes, the arrangement matrix and spacing of the second mounting holes 44 in the middle can be adjusted. This modular hole design allows the same mounting plate 40 to match various specifications of movers 31 and slide saddles 10 through different hole combinations, enhancing the adaptability and versatility of the equipment, while ensuring connection rigidity and assembly accuracy. Preferably, in this embodiment, the first mounting holes 43 and the second mounting holes 44 are both threaded holes, and installation and fixation are achieved by screws that engage with the threaded holes.

[0045] Specifically, in this embodiment, a plurality of first mounting holes 43 are distributed in two columns, and the two columns of first mounting holes 43 are located on both sides of the mounting plate 40 respectively. Each column of first mounting holes 43 is spaced apart along the moving direction of the slide block 20. A plurality of second mounting holes 44 are located between the two columns of first mounting holes 43 and are arrayed on the mounting plate 40.

[0046] Furthermore, the drive device also includes a guide structure 50, which is disposed between the slide saddle 10 and the slide ram 20. The guide structure 50 is used to guide the movement of the slide ram 20. Specifically, the guide structure 50 includes a guide rail 51 and a guide block 52. The guide rail 51 is disposed on both sides of the slide ram 20 and extends along the direction of movement of the slide ram 20. The guide block 52 is disposed on both sides of the slide saddle 10 and cooperates with the guide rail 51 to guide the slide ram 20.

[0047] In this application, a stable guiding structure is formed by setting guide rails 51 extending along the moving direction on both sides of the slide ram 20 and configuring guide blocks 52 that cooperate with them on both sides of the slide saddle 10. This design ensures the linearity and smoothness of the slide ram 20 moving along the Z-axis within the slide saddle 10, avoiding lateral load and swaying during movement. Secondly, the mating surfaces of the guide rails 51 and guide blocks 52 increase the contact area and load-bearing strength between the slide saddle 10 and the slide ram 20, further overcoming the torsional and bending moments generated during operation and preventing deformation of the slide ram 20 due to overhang machining. In addition, the above structure also optimizes the transmission path of cutting force, transmitting the cutting force more directly to the overall frame of the machine tool. Combined with the drive of the linear motor 30, this improves the dynamic response characteristics, vibration resistance, and machining quality of the machine tool.

[0048] In some embodiments, the guide structure can also be a guide fit between a slider and a groove, a guide fit between a lead screw and a slider, or a guide fit between a roller and a track.

[0049] Furthermore, the drive unit also includes a limiting structure 60, which is disposed between the ram 20 and the saddle 10. The limiting structure 60 can limit the travel of the ram 20 relative to the saddle 10. The limiting structure 60 can be a limiting baffle, a limiting protrusion, or other similar structures. The limiting structure is used to limit the range of movement of the ram 20 on the saddle 10, preventing mechanical damage caused by overload or loss of control, ensuring the safe and stable operation of the entire system, and further extending the service life of the machinery.

[0050] Specifically, the limiting structure 60 includes a first bracket 61, which is disposed on the top of the slide ram 20. The first bracket 61 includes a first connecting section 611 and a first limiting section 612. The first connecting section 611 is connected to the slide ram 20, and the first limiting section 612 is connected to the first connecting section 611. The first limiting section 612 extends toward the slide saddle 10. When the slide ram 20 moves relative to the slide saddle 10 to the lower limit position, the first limiting section 612 abuts against the top of the slide saddle 10 and is limited.

[0051] Furthermore, the limiting structure 60 also includes a second bracket 62 and a limiting part. The second bracket 62 is disposed on the top of the slide saddle 10, and the limiting part is disposed on the side wall of the slide ram 20. The second bracket 62 includes a second connecting section 621 and a second limiting section 622. The second connecting section 621 is connected to the slide saddle 10, and the second limiting section 622 is connected to the second connecting section 621. The second limiting section 622 extends toward the slide ram 20 and is located on the side of the slide ram 20. When the slide ram 20 moves relative to the slide saddle 10 to the upper limit position, the second limiting section 622 abuts against the limiting part and is limited.

[0052] With the above structure, a first bracket 61 with a first connecting section 611 and a first limiting section 612 extending towards the slide saddle 10 is provided on the top of the slide ram 20, and a second bracket 62 with a second connecting section 621 and a second limiting section 622 extending towards the slide ram 20 is provided on the top of the slide saddle 10. Together with the limiting part on the side wall of the slide ram 20, they form a mechanical limiting system. When the slide ram 20 moves to the lower limit position, the first limiting section 612 abuts against the top of the slide saddle 10, and when it moves to the upper limit position, the second limiting section 622 abuts against the limiting part. This effectively prevents the slide ram 20 from moving beyond its travel range, avoids mechanical collision accidents, and transmits the impact force to the slide saddle 10 body through direct mechanical contact. It makes full use of the structural rigidity of the slide saddle 10 to absorb and disperse the load, improves the safety and reliability of the system at extreme positions, and ensures the stability of long-term operation.

[0053] like Figure 5 As shown, this application also includes a gantry machining center 70, which includes the drive device provided in the above embodiments.

[0054] It should also be noted that this application, through the above structure, has the following advantages, specifically:

[0055] 1. Significantly improve machining accuracy and quality: reduce vibration, hysteresis and thermal deformation, and ensure the surface finish of machined parts.

[0056] 2. Significantly improve Z-axis traverse speed and machining efficiency: Increase the Z-axis traverse speed and shorten the machining cycle time.

[0057] 3. Enhance system stability and reliability: Improve thermal stability, reduce load on critical components, and extend service life.

[0058] 4. Optimize operating costs: reduce energy consumption and maintenance requirements.

[0059] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0063] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0064] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0065] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

Claims

1. A driving device, characterized in that, The driving device includes: Saddle (10); A bolster (20) is movably mounted on the slide saddle (10), and the direction of movement of the bolster (20) is the same as the direction of extension of the bolster (20); The linear motor (30) assembly includes a mover (31) and a stator (32). The mover (31) is fixedly mounted on the slide saddle (10), and the stator (32) is fixedly mounted on the ram (20). The extension direction of the stator (32) is the same as the movement direction of the ram (20). The mover (31) is driven to the stator (32) by electromagnetic force so that the ram (20) moves relative to the slide saddle (10).

2. The driving device according to claim 1, characterized in that, The drive device further includes: Mounting plate (40) is disposed on the side of the slide saddle (10) facing the slide block (20). The mounting plate (40) is located between the slide saddle (10) and the mover (31). The mounting plate (40) has a first mounting surface (41) and a second mounting surface (42) disposed opposite to each other. The first mounting surface is adapted to the mover (31). The mover (31) is fixed on the first mounting surface. The second mounting surface is fixedly connected to the slide saddle (10).

3. The driving device according to claim 2, characterized in that, The mounting plate (40) has a plurality of first mounting holes (43) and a plurality of second mounting holes (44), the first mounting holes (43) being used to connect the mover (31) and the plurality of second mounting holes (44) being used to connect the slide saddle (10).

4. The driving device according to claim 1, characterized in that, The drive device further includes a guide structure (50) disposed between the slide saddle (10) and the slide ram (20), the guide structure (50) being used to guide the movement of the slide ram (20).

5. The driving device according to claim 4, characterized in that, The guide structure (50) includes: Guide rails (51) are provided on both sides of the slide (20), and the guide rails (51) extend along the moving direction of the slide (20); Guide blocks (52) are disposed on both sides of the slide saddle (10), and the guide blocks (52) cooperate with the guide rail (51) to guide the slide ram (20).

6. The driving device according to claim 1, characterized in that, The drive device further includes a limiting structure (60) disposed between the slide (20) and the slide saddle (10), the limiting structure (60) being used to limit the travel of the slide (20) relative to the slide saddle (10).

7. The driving device according to claim 6, characterized in that, The limiting structure (60) includes a first bracket (61) disposed on the top of the slide (20). The first bracket (61) includes a first connecting section (611) and a first limiting section (612). The first connecting section (611) is connected to the slide (20), and the first limiting section (612) is connected to the first connecting section (611). The first limiting section (612) extends toward the slide saddle (10). When the slide (20) moves relative to the slide saddle (10) to the lower limiting position, the first limiting section (612) abuts against the top of the slide saddle (10) for limiting.

8. The driving device according to claim 6, characterized in that, The limiting structure (60) further includes a second bracket (62) and a limiting part. The second bracket (62) is disposed on the top of the slide saddle (10), and the limiting part is disposed on the side wall of the slide ram (20). The second bracket (62) includes a second connecting section (621) and a second limiting section (622). The second connecting section (621) is connected to the slide saddle (10), and the second limiting section (622) is connected to the second connecting section (621). The second limiting section (622) extends toward the slide ram (20) and is located on the side of the slide ram (20). When the slide ram (20) moves relative to the slide saddle (10) to the upper limit position, the second limiting section (622) abuts against the limiting part and is limited.

9. The driving device according to claim 3, characterized in that, The first mounting holes (43) are distributed in two columns, and the two columns of the first mounting holes (43) are located on both sides of the mounting plate (40). Each column of the first mounting holes (43) is spaced apart along the moving direction of the slide block (20). The second mounting holes (44) are located between the two columns of the first mounting holes (43).

10. A gantry machining center, characterized in that, The gantry machining center includes the drive device as described in any one of claims 1 to 9.

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