Crown block side hanging type gantry machining center
By combining the side-mounted design of the overhead crane with the reinforcing ribs of the base, the problem of insufficient column rigidity was solved, enabling efficient and high-precision machining of the gantry machining center.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-04-10
AI Technical Summary
The existing gantry machining centers have a small column footprint, resulting in insufficient rigidity. This makes them prone to elastic deformation and vibration under cutting forces, affecting machining accuracy and stability.
The design adopts a crane-side-mounted configuration. The column assembly includes a base and reinforcing ribs to enhance the rigidity of the beam structure. It also provides stable support through a guide rail and slider system, thereby improving the load-bearing capacity and deformation resistance of the column.
It enhances the rigidity and operational stability of the machine tool, reduces vibration and deformation, and ensures efficient and high-precision machining results.
Smart Images
Figure CN224102318U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to numerical control machine tool technical field, especially relates to a crane side hanging type gantry machining center. BACKGROUND
[0002] The gantry machining center is a large numerical control machine tool, the spindle is vertically arranged with the worktable, is mainly used in processing large, complex workpiece, has the gantry type structure characteristics, is composed of the frame structure like the frame of bed, stand, beam etc. At present some gantry machining centers exist the problem that the stand occupies the small area, the stand is used for supporting the beam and the spindle important component, the small area may make the structure size of stand limited, when bearing the cutting force load etc., it is more easy to produce the elastic deformation, the rigidity is insufficient, when the machine tool is in the heavy cutting or high speed cutting, especially when processing large, irregular shape workpiece, it is easy to produce the larger cutting force and the torque, the smaller support area makes the machine tool whole resistance to overturning ability relatively weak, may appear the shaking or the vibration, influences the machining precision and the surface quality, the stability is relatively poor. SUMMARY
[0003] The utility model solves the technical problem that provides a crane side hanging type gantry machining center, the land area of stand assembly is big, promotes the rigidity and the machine tool operation stability.
[0004] In order to solve the above technical problem, the utility model adopts the following technical scheme:
[0005] The crane side hanging type gantry machining center, including worktable, stand assembly, beam, slide saddle and spindle box, the stand assembly includes the left stand and right stand respectively arranged in the both sides of worktable, the left stand and right stand all include the stand body and the big base that is integrally formed below the stand body, the both ends bottom of beam is equipped with the left connecting seat and right connecting seat that are integrally formed, is equipped with the reinforcing rib between left connecting seat and beam, between right connecting seat and beam, left slide plate and right slide plate are installed on left connecting seat and right connecting seat respectively, left slide plate and right slide plate are slidably connected with the top of left stand and right stand respectively, slide saddle is slidably connected in the front side of beam, spindle box is slidably connected on slide saddle.
[0006] In some embodiments, the top of left stand and right stand is opened with mounting groove along X axle direction, the both sides of mounting groove are installed with first X axle guide rail and second X axle guide rail respectively, the groove bottom of mounting groove is installed with third X axle guide rail, X axle screw nut pair is equipped above third X axle guide rail, connecting sliding block is installed on the nut of X axle screw nut pair, and connecting sliding block is slidably connected with third X axle guide rail; The bottom of left slide plate and right slide plate is equipped with two groups of X axle sliding blocks that are slidably connected with first X axle guide rail and second X axle guide rail respectively, and is equipped with first nut seat that is fixedly connected with the nut of X axle screw nut pair. The number of each group of X axle sliding blocks is at least four.
[0007] In some embodiments, the front side of the cross beam is provided with a stepped structure, and the first Y-axis guide rail, the second Y-axis guide rail and the third Y-axis guide rail are arranged in a stepped manner on the front side of the cross beam, and the Y-axis screw nut pair is also arranged on the front side of the cross beam; the slide saddle is provided with three groups of Y-axis sliding blocks respectively in sliding connection with the first Y-axis guide rail, the second Y-axis guide rail and the third Y-axis guide rail, and the second nut seat is fixedly connected with the nut of the Y-axis screw nut pair. The number of each group of Y-axis sliding blocks is at least two.
[0008] In some embodiments, the side and top of the cross beam are provided with a plurality of second weight-avoiding holes, and the side and top of the slide saddle are provided with a plurality of third weight-avoiding holes.
[0009] Compared with the prior art, the utility model realizes at least the following beneficial effects:
[0010] The left column and the right column are used for supporting the weight of important components such as the cross beam, the slide saddle and the spindle box, and the left column and the right column each include a column body and a large base, compared with the existing column structure, the large base has a large contact area with the ground, improves rigidity, better resists bending and distortion when the left column and the right column are subjected to external force, better maintains the original shape and position of the left column and the right column under dynamic working conditions such as high-speed cutting and rapid feeding, reduces vibration and deformation caused by inertial force and impact force, and is beneficial to realize efficient and high-precision machining of the machine tool; the machine tool operation stability is improved, the weight of the components is more evenly distributed to the ground, the pressure per unit area is reduced, the left column and the right column can maintain stability when bearing a large load, tilting or deformation is prevented, the support capacity is enhanced, the cutting force generated between the tool and the workpiece during the machining process is transmitted to the left column and the right column, and the left column and the right column maintain stability under the action of the cutting force; the reinforcing ribs are arranged between the left connecting seat and the cross beam and between the right connecting seat and the cross beam, which can enhance the structural strength and rigidity of the cross beam and ensure the stability of the cross beam during movement. BRIEF DESCRIPTION OF DRAWINGS
[0011] Fig. 1 The figure is a structural schematic diagram of the embodiment of the application;
[0012] Fig. 2 The figure is a structural schematic diagram of the right column of the embodiment of the application;
[0013] Fig. 3 The figure is a structural schematic diagram of the cross beam of the embodiment of the application;
[0014] Fig. 4 The figure is a connection structure schematic diagram of the column assembly, the cross beam, the slide saddle and the spindle box of the embodiment of the application.
[0015] The figure marks are: 1, workbench; 2, left stand column; 3, right stand column; 4, crossbeam; 41, first Y-axis guide rail; 42, second Y-axis guide rail; 43, third Y-axis guide rail; 44, Y-axis screw nut pair; 5, left connecting seat; 51, left slide plate; 6, right connecting seat; 61, right slide plate; 7, slide saddle; 71, Y-axis sliding block; 8, main shaft box; 9, reinforcing rib; 10, installation groove; 101, first X-axis guide rail; 102, second X-axis guide rail; 103, third X-axis guide rail; 104, X-axis screw nut pair; 1041, connecting sliding block; 20, X-axis sliding block; 30, first nut seat; 40, first gravity avoiding hole; 50, second gravity avoiding hole; 60, third gravity avoiding hole; 70, fourth gravity avoiding hole; 100, stand column body; 200, large bottom base. DETAILED DESCRIPTION
[0016] The utility model will be described in detail below with reference to the exemplary embodiments in the drawings. But it should be known that the present application can be realized through various different forms, and should not be understood as being limited to the embodiments set forth herein. The embodiments are provided herein to make the disclosure of the present application more complete, and to fully convey the concept of the present application to the person skilled in the art.
[0017] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several", "a plurality of" is two or more, unless otherwise explicitly specified and limited. In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include the first and second features directly contacting, or the first and second features not directly contacting but contacting through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0018] As Figs. 1-4 shown, the overhead crane side hanging type gantry machining center provided by the embodiment of the present application comprises a workbench 1, a column assembly, a cross beam 4, a slide saddle 7 and a spindle box 8.
[0019] The column assembly comprises a left column 2 and a right column 3 arranged on the two sides of the workbench 1 respectively, and each of the left column 2 and the right column 3 comprises a column body 100 and a large bottom base 200 integrally formed below the column body 100; the two ends of the cross beam 4 are respectively provided with a left connecting seat 5 and a right connecting seat 6 integrally formed, and each of the left connecting seat 5 and the right connecting seat 6 is provided with a reinforcing rib 9 between the left connecting seat 5 and the cross beam 4 and between the right connecting seat 6 and the cross beam 4; the left connecting seat 5 and the right connecting seat 6 are respectively provided with a left sliding plate 51 and a right sliding plate 61, and the left sliding plate 51 and the right sliding plate 61 are respectively slidably connected to the top of the left column 2 and the right column 3; the cross beam 4 is used to drive the cutter to move forward and backward along the X-axis; a slide saddle 7 is slidably connected to the front side of the cross beam 4, and the slide saddle 7 is used to drive the cutter to move left and right along the Y-axis; and a spindle box 8 is slidably connected to the slide saddle 7, and the spindle box 8 is used to drive the cutter to move up and down along the Z-axis. The gantry machining center adopts a crown block type structure and a side hanging type design, the cross beam 4 is like a crown block and spans the workbench 1, which can provide a larger machining space, and the spindle box 8 is hung on the front side of the cross beam 4, which enhances the rigidity and stability of the machine tool.
[0020] It should be noted that the left column 2 and the right column 3 are used to support the weight of the cross beam 4, the slide saddle 7 and the spindle box 8 and the like, and each of the left column 2 and the right column 3 comprises a column body 100 and a large bottom base 200. Compared with the existing column structure, the large bottom base 200 has a large contact area with the ground, which can improve the running stability, more evenly distribute the weight of the cross beam 4, the slide saddle 7 and the spindle box 8 and the like to the ground, reduce the pressure per unit area, ensure that the left column 2 and the right column 3 can remain stable when bearing a large load, prevent tilting or deformation, enhance the supporting capacity, and make the left column 2 and the right column 3 remain stable under the action of the cutting force generated between the cutter and the workpiece during the machining process; can improve the rigidity, better resist bending and twisting deformation when the left column 2 and the right column 3 are subjected to external force, better maintain the original shape and position of the left column 2 and the right column 3 under dynamic working conditions such as high-speed cutting and rapid feeding, reduce vibration and deformation caused by inertial force and impact force, and be beneficial to realize efficient and high-precision machining of the machine tool. The reinforcing ribs 9 arranged between the left connecting seat 5 and the cross beam 4 and between the right connecting seat 6 and the cross beam 4 can enhance the structural strength and rigidity of the cross beam 4 and ensure the stability of the cross beam 4 during movement.
[0021] The left stand column 2 and the right stand column 3 are provided with mounting grooves 10 at the top in the X-axis direction, the first X-axis guide rail 101 and the second X-axis guide rail 102 are mounted on the two sides of the mounting groove 10, the third X-axis guide rail 103 is mounted on the groove bottom of the mounting groove 10, the X-axis screw nut pair 104 is arranged above the third X-axis guide rail 103, a sliding block seat is mounted on the nut of the X-axis screw nut pair 104, the connecting sliding block 1041 is mounted on the sliding block seat, and the connecting sliding block 1041 is in sliding connection with the third X-axis guide rail 103; the left sliding plate 51 and the right sliding plate 61 are provided with two groups of X-axis sliding blocks 20 in sliding connection with the first X-axis guide rail 101 and the second X-axis guide rail 102 respectively at the bottom, and the first nut seat 30 is in fixed connection with the nut of the X-axis screw nut pair 104. By arranging the connecting sliding block 1041 on the nut of the X-axis screw nut pair 104, the connecting sliding block 1041 is in sliding connection with the third X-axis guide rail 103, and the X-axis sliding blocks 20 in sliding connection with the first X-axis guide rail 101 and the second X-axis guide rail 102 are arranged at the bottom of the left sliding plate 51 and the right sliding plate 61, so that stable and uniform support can be provided for the bottom of the two ends of the cross beam 4. Optionally, the number of each group of X-axis sliding blocks 20 is at least four, so that the number of the two groups of X-axis sliding blocks 20 is at least eight in total, the carrying capacity is strong, the structural rigidity of the cross beam 4 is further enhanced, the cross beam 4 runs stably, and the machine tool is beneficial to heavy cutting machining.
[0022] The front side of the cross beam 4 is provided with a stepped structure, the first Y-axis guide rail 41, the second Y-axis guide rail 42 and the third Y-axis guide rail 43 arranged in a stepped manner are mounted on the front side of the cross beam 4, and the Y-axis screw nut pair 44 is also mounted; the three groups of Y-axis sliding blocks 71 in sliding connection with the first Y-axis guide rail 41, the second Y-axis guide rail 42 and the third Y-axis guide rail 43 respectively are arranged on the slide saddle 7, and the second nut seat in fixed connection with the nut of the Y-axis screw nut pair 44 is also arranged, so as to improve the structural strength and rigidity of the machine tool and ensure the machining precision. Optionally, the number of each group of Y-axis sliding blocks 71 is at least two.
[0023] The X-axis screw nut pair 104 and the Y-axis screw nut pair 44 are driven by a motor, the X-axis screw nut pair 104 and the Y-axis screw nut pair 44 convert the rotary motion of the motor into the linear motion of the nut, so as to drive the cross beam 4 and the slide saddle 7 to move.
[0024] The side of the left stand column 2 and the right stand column 3 is provided with a plurality of first gravity-avoiding holes 40, the side and the top of the cross beam 4 are provided with a plurality of second gravity-avoiding holes 50, the side and the top of the slide saddle 7 are provided with a plurality of third gravity-avoiding holes 60, and the side and the top of the main shaft box 8 are provided with a plurality of fourth gravity-avoiding holes 70. By arranging the first gravity-avoiding holes 40, the second gravity-avoiding holes 50, the third gravity-avoiding holes 60 and the fourth gravity-avoiding holes 70, the manufacturing cost is reduced, the weight of the cross beam 4, the slide saddle 7 and the main shaft box 8 is reduced, the cross beam 4, the slide saddle 7 and the main shaft box 8 are more light in operation, the burden of the motor is reduced, and the hollow structure is convenient for arranging lines and pipelines.
[0025] It should be understood that all the above embodiments are exemplary but not restrictive, and any modification, equivalent change and modification made by the person skilled in the art to the above described specific embodiments are still within the scope of the technical scheme of the utility model.
Claims
1. A gantry machining center with a side suspension of a crown block, characterized in that: The machine tool comprises a workbench, a column assembly, a cross beam, a saddle and a spindle box. The column assembly comprises left and right columns respectively arranged on two sides of the workbench, and each of the left and right columns comprises a column body and a large base integrally formed below the column body. The cross beam is provided with integrally formed left and right connecting seats at its two ends, and each of the left and right connecting seats is provided with a reinforcing rib between the connecting seat and the cross beam. The saddle is slidably connected to the front side of the cross beam. The spindle box is slidably connected to the saddle.
2. The overhead gantry machining center of claim 1, wherein: The left and right columns are each provided with an installation groove opened along the X-axis direction at the top thereof, and the two sides of the installation groove are respectively provided with a first X-axis guide rail and a second X-axis guide rail.
3. The overhead gantry machining center of claim 2, wherein: The number of X-axis sliding blocks in each group is at least four.
4. The overhead gantry machining center of claim 1, wherein: The front side of the cross beam is provided with a stepped structure, and the front side of the cross beam is provided with a first Y-axis guide rail, a second Y-axis guide rail and a third Y-axis guide rail arranged in a stepped manner.
5. The overhead gantry machining center of claim 4, wherein: The number of Y-axis sliding blocks in each group is at least two.
6. The overhead gantry machining center of claim 1, wherein: The left and right columns are each provided with a plurality of first gravity avoidance holes at the side thereof. The cross beam is provided with a plurality of second gravity avoidance holes at the side and top thereof. The saddle is provided with a plurality of third gravity avoidance holes at the side and top thereof. The spindle box is provided with a plurality of fourth gravity avoidance holes at the side and top thereof.