A crossbeam structure of a new crown block type machine tool

Abstract

The utility model provides a kind of beam part structure of novel crown block type machine tool belongs to machine tool beam technical field, including crossbeam, one end of the crossbeam is equipped with stand, the inside of the crossbeam is equipped with support block and screw rod, the crossbeam is connected with arcuate plate, the screw rod is connected with lock nut, the both ends of the arcuate plate are equipped with lateral slider and connecting plate respectively;The utility model has beneficial effect: by increasing two support guide rails on stand, and connecting high-strength high-elasticity arcuate alloy steel, while in the middle of crossbeam by screw rod support to high-strength high-elasticity alloy steel, internal structure interaction, exert tensile force to crossbeam, offset the thermal elongation of crossbeam, enhance the connection rigidity of crossbeam, processing accuracy, stability, increase damping and reduce the influence of vibration on crossbeam shaft, it can be used to strengthen machine tool structure rigidity, large-span beam's dead weight deformation compensation, internal expansion force compensates the thermal elongation of crossbeam, and improve the stability and processing accuracy of machine tool.

Description

Technical Field

[0001] This utility model relates to the field of machine tool beam technology, and more specifically, to a new type of beam structure for overhead crane machine tools. Background Technology

[0002] The crossbeam structure of the overhead crane machine tool is the core component connecting the two columns, acting as the "backbone" of the machine tool. It is mainly composed of a high-strength cast iron or welded steel structure, a complex internal rib grid, and a precision guide rail system. This design aims to ensure that the crossbeam has extremely high rigidity, stable dynamic performance, and excellent vibration resistance to support components such as the spindle slide saddle to achieve precise Y-axis and Z-axis movements, and resist the huge overturning torque generated during heavy cutting, thereby ensuring the machining accuracy and stability of the entire machine within a large span machining range.

[0003] Given the development trend of the domestic machine tool industry, the market demand for machine tools is increasing rapidly. There is an urgent need for high-precision, high-stability, and high-strength machine tools. Conventional overhead crane-type gantry cranes on the market often increase the cross-sectional area of ​​the crossbeam to increase its strength. However, this often results in problems such as thermal elongation of the crossbeam affecting the straightness of the machine tool and deformation due to the weight of the crossbeam itself. How to invent a new type of crossbeam structure for overhead crane-type machine tools to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a novel beam structure for overhead crane machine tools, aiming to improve upon conventional overhead crane gantry cranes on the market, which often increase the cross-sectional area of ​​the beam to increase its strength. However, these conventional designs commonly suffer from problems such as thermal elongation of the beam affecting the straightness of the machine tool and deformation due to the beam's own weight.

[0005] This utility model is implemented as follows: This utility model provides a novel beam structure for a crane-type machine tool, including a beam, a column at one end of the beam, a support block and a screw inside the beam, an arched plate connected to the beam, a locking nut connected to the screw, and lateral sliders and connecting plates at both ends of the arched plate.

[0006] Preferably, a wedge block is fixedly connected to the side wall of the crossbeam, the wedge block is sleeved on the outer wall of the screw, and longitudinal sliders are fixedly connected to both ends of the crossbeam.

[0007] Preferably, one end of the screw is threadedly connected to the locking nut, and the other end of the screw is fixedly connected to the support block.

[0008] Preferably, one side of the arched plate is located inside the crossbeam, and the outer wall of the arched plate abuts against the support block.

[0009] Preferably, the arched plate has a recessed slot at one end located on the outer side of the crossbeam, and the recessed slot is connected to a connecting bolt.

[0010] Preferably, the sidewalls of the connecting plate are respectively provided with through holes and connecting screw holes, the connecting screw holes are threadedly connected to connecting bolts, and the through holes are connected to butt bolts.

[0011] Preferably, the connecting plate has a lateral slider on one side, and the lateral slider has a threaded hole on one side for threaded connection with the mating bolt.

[0012] Preferably, a longitudinal guide rail is provided on one side of the column, and the longitudinal guide rail is slidably connected to the longitudinal slider. A side guide rail is fixedly connected to one end of the column near the connecting plate, and the side guide rail is slidably connected to the side slider.

[0013] The beneficial effects of this utility model are: By adding two support guide rails to the column and connecting them with high-strength, high-elasticity arched alloy steel, and simultaneously supporting the crossbeam to the high-strength, high-elasticity alloy steel via screws in the middle of the crossbeam, the internal structures interact to apply tension to the crossbeam, offsetting the thermal expansion of the crossbeam, enhancing the connection rigidity, machining accuracy, and stability of the crossbeam, increasing damping to reduce the impact of vibration on the crossbeam axis. This can be used to strengthen the structural rigidity of machine tools, compensate for the self-weight deformation of large-span crossbeams, compensate for the thermal expansion of the crossbeam with internal expansion force, and improve the stability and machining accuracy of machine tools. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the crossbeam of a novel overhead crane machine tool provided by an embodiment of this utility model; Figure 2 This is a schematic diagram of the lower end structure of the crossbeam of a novel overhead crane machine tool provided by an embodiment of this utility model; Figure 3 This is a partial cross-sectional view of the crossbeam structure of a novel overhead crane machine tool provided by this utility model embodiment; Figure 4 This is an exploded structural diagram of the arched plate, connecting plate, and lateral slider of the crossbeam structure of a novel overhead crane machine tool provided by this utility model embodiment; Figure 5 This is a schematic diagram of the screw structure of the crossbeam section of a novel overhead crane machine tool provided by an embodiment of this utility model.

[0016] In the diagram: 1. Column; 2. Longitudinal guide rail; 3. Crossbeam; 4. Side guide rail; 5. Longitudinal slider; 6. Lateral slider; 7. Connecting plate; 8. Arch plate; 9. Support block; 10. Screw; 11. Wedge block; 12. Locking nut; 13. Butt bolt; 14. Butt bolt hole; 15. Through hole; 16. Recessed slot hole; 17. Connecting bolt; 18. Connecting bolt hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Example, refer to Figures 1-5 A new type of overhead crane machine tool has a crossbeam structure, including a crossbeam 3, a column 1 at one end of the crossbeam 3, a support block 9 and a screw 10 inside the crossbeam 3, an arched plate 8 connected to the crossbeam 3, a locking nut 12 connected to the screw 10, and a lateral slider 6 and a connecting plate 7 respectively at both ends of the arched plate 8.

[0019] Furthermore, a wedge block 11 is fixedly connected to the side wall of the crossbeam 3, and the wedge block 11 is sleeved on the outer wall of the screw 10. Both ends of the crossbeam 3 are fixedly connected to longitudinal sliders 5. One end of the screw 10 is threadedly connected to the locking nut 12, and the other end of the screw 10 is fixedly connected to the support block 9. One side of the arched plate 8 is located inside the crossbeam 3, and the outer wall of the arched plate 8 abuts against the support block 9.

[0020] It should be noted that during assembly, firstly, one end of the screw 10 is passed through the matching holes of the side wall of the crossbeam 3 and the wedge block 11. Then, the arch plate 8 is precisely installed below the screw 10, so that the outer side wall of the arch plate 8 is in full contact with the support block 9. The design of the support block 9 can effectively expand the force-bearing area and prevent the concentrated force transmitted by the screw 10 from acting directly on the local area of ​​the arch plate 8, thus preventing the arch plate 8 from deforming or being damaged due to excessive local stress. When the locking nut 12 at the end of the screw 10 is tightened with appropriate torque, the locking force will be transmitted axially along the screw 10 to the support block 9, and then evenly distributed to the entire contact surface of the arch plate 8 through the support block 9. Since the arch plate 8 is made of high-elasticity alloy steel, it has excellent force transmission characteristics and can efficiently transmit the received force to the sliders connected at both ends. Finally, through the rigid connection between the slider and the guide rail on the column 1, the force is transmitted to the two columns 1, ensuring the stable transmission of force between the crossbeam 3 and the column 1, and avoiding structural loosening caused by local force imbalance.

[0021] During the tightening of the locking nut 12, the reaction force generated during tightening will provide upward support to the crossbeam 3. This support force can directly act on the suspended area in the middle of the crossbeam 3. In traditional overhead crane machine tools, the crossbeam 3 has a large span, and the suspended area in the middle is prone to downward deformation due to its own weight or load. The reaction force provided by the wedge block 11 can effectively offset part of the deformation trend and reduce the load pressure in the suspended area. At the same time, after the locking force is transmitted to the two side columns 1 through the arch plate 8, it will form a uniform lateral pre-tension force on the crossbeam 3. This pre-tension force can offset the crossbeam 3 in advance. During operation, thermal expansion and contraction cause thermal elongation. When the machine tool is running, the crossbeam 3 is prone to thermal elongation in the length direction due to the heat of processing. The pre-tension force can suppress the straightness deviation caused by thermal elongation by "pulling the crossbeam 3", and avoid the deformation of the crossbeam 3 from affecting the processing accuracy. In addition, the pre-tension force can also optimize the force flow distribution inside the crossbeam 3, so that the force is evenly transmitted in the overall structure of the crossbeam 3, rather than concentrated in local weak areas, significantly enhancing the support rigidity of the crossbeam 3. Even when bearing processing load, it can maintain structural stability and reduce the risk of deformation.

[0022] The arched plate 8 is not only a key component for force transmission, but its highly elastic material and structural design also endow the crossbeam 3 with excellent damping and vibration absorption performance. When a workpiece is processed by a machine tool, vibration will be generated. If the vibration is transmitted to the crossbeam 3, it will easily lead to instability in the operation of the crossbeam 3 axis, affecting the processing accuracy. As a flexible connector, the arched plate 8 can absorb some of the vibration energy through its own elastic deformation. When the vibration is transmitted to the arched plate 8, its arc structure can buffer the vibration impact through small deformation. At the same time, the damping characteristics of the material itself can consume the vibration energy and reduce the transmission of vibration between the crossbeam 3 and the column 1. This vibration absorption capability can not only reduce the vibration amplitude of the crossbeam 3 axis, but also reduce the wear of the guide rail, slider and other moving parts, and extend the service life of the parts. Compared with the traditional rigid connection structure, the flexible design of the arched plate 8 enables the crossbeam 3 to have a certain "vibration buffering" capability while maintaining rigidity. It is especially suitable for high-precision processing scenarios, which can effectively improve the stability of the machine tool during operation and ensure the dimensional accuracy and surface quality of the processed workpiece.

[0023] Reference Figures 4-5 Furthermore, the arched plate 8 has a recessed slot 16 at one end outside the crossbeam 3, and the recessed slot 16 is connected to a connecting bolt 17; the side wall of the connecting plate 7 has a through hole 15 and a connecting screw hole 18, the connecting screw hole 18 is threaded to the connecting bolt 17, and the through hole 15 is connected to a butt bolt 13; a lateral slider 6 is provided on one side of the connecting plate 7, and a butt screw hole 14 is provided on one side of the lateral slider 6, which is threaded to the butt bolt 13; a longitudinal guide rail 2 is provided on one side of the column 1, and the longitudinal guide rail 2 is slidably connected to the longitudinal slider 5; a side guide rail 4 is fixedly connected to one end of the column 1 near the connecting plate 7, and the side guide rail 4 is slidably connected to the side slider 6.

[0024] It should be noted that: Positioning and anti-interference design of the recessed slot 16: The recessed slot 16 at the end of the arched plate 8 has a "groove" structure. When the connecting bolt 17 passes through the slot and is threaded to the connecting bolt hole 18 of the connecting plate 7, the bolt head can be completely embedded in the slot, avoiding structural interference caused by the bolt head protruding. This not only prevents the bolt from rubbing against other parts when the crossbeam 3 moves, but also ensures that the mating surfaces of the arched plate 8 and the connecting plate 7 are in close contact, without gaps or interference transmission.

[0025] Force transmission guarantee of threaded connection: The threaded engagement of connecting bolt 17 and connecting screw hole 18 must be tightened to the preset torque so that the arch plate 8 and connecting plate 7 form a rigid whole. This connection method can evenly transmit the pre-tension force and support force borne by the arch plate 8 to the connecting plate 7, avoiding interruption of force transmission or local stress concentration due to loose connection, and laying the foundation for subsequent force transmission to slider and column 1.

[0026] Guiding and positioning of through hole 15 and mating bolt 13: The through hole 15 on the side wall of the connecting plate 7 is designed as a "smooth hole". Its diameter is slightly larger than the diameter of the rod of the mating bolt 13. It can provide a certain adjustment margin for the bolt during assembly, so as to make the mating bolt 13 accurately aligned with the mating screw hole 14 of the side slider 6, reduce assembly error, and ensure that the connecting surfaces of the connecting plate 7 and the side slider 6 are flat and fit together.

[0027] Force transmission closed loop of rigid connection: After the connecting bolt 13 passes through the through hole 15 and is tightened into the connecting screw hole 14, the connecting plate 7 and the lateral slider 6 form a rigid structure that cannot move relative to each other. At this time, the force (pre-tension force and support reaction force) transmitted from the arch plate 8 to the connecting plate 7 can be directly transmitted to the lateral slider 6, and then transmitted to the column 1 through the cooperation of the slider and the guide rail, finally forming a complete force transmission closed loop, ensuring that the pre-tension force and anti-deformation force of the beam 3 can act stably on the column 1 and avoid structural loosening.

[0028] The synergistic effect of the dual guide rails: The dual sliding cooperation of the lateral slider 6-side guide rail 4 and the longitudinal slider 5-longitudinal guide rail 2 forms a synergistic mechanism of "longitudinal guidance + lateral limiting", which not only ensures that the crossbeam 3 can move accurately according to the preset trajectory, but also maintains structural stability during the movement, avoids slider offset or guide rail wear caused by vibration and load, and takes into account both movement flexibility and structural rigidity, adapting to the requirements of high-precision machining for the movement accuracy of the crossbeam 3.

[0029] It should be noted that the specific model and specifications need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the 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.

Claims

1. A novel overhead crane machine tool's crossbeam structure, comprising a crossbeam (3), one end of which is provided with a column (1), characterized in that, The crossbeam (3) is provided with a support block (9) and a screw (10) inside. The crossbeam (3) is connected to an arched plate (8). The screw (10) is connected to a locking nut (12). The two ends of the arched plate (8) are respectively provided with a side slider (6) and a connecting plate (7).

2. The beam structure of a novel overhead crane machine tool according to claim 1, characterized in that, The side wall of the crossbeam (3) is fixedly connected with a wedge block (11), the wedge block (11) is sleeved on the outer wall of the screw (10), and both ends of the crossbeam (3) are fixedly connected with longitudinal sliders (5).

3. The beam structure of a novel overhead crane machine tool according to claim 1, characterized in that, One end of the screw (10) is threadedly connected to the locking nut (12), and the other end of the screw (10) is fixedly connected to the support block (9).

4. The beam structure of a novel overhead crane machine tool according to claim 1, characterized in that, One side of the arched plate (8) is located inside the crossbeam (3), and the outer wall of the arched plate (8) abuts against the support block (9).

5. The beam structure of a novel overhead crane machine tool according to claim 2, characterized in that, The arched plate (8) has a recessed slot (16) at one end located outside the crossbeam (3), and the recessed slot (16) is connected to a connecting bolt (17).

6. The beam structure of a novel overhead crane machine tool according to claim 5, characterized in that, The sidewall of the connecting plate (7) is provided with a through hole (15) and a connecting screw hole (18). The connecting screw hole (18) is threadedly connected to the connecting bolt (17), and the through hole (15) is connected to the butt bolt (13).

7. The beam structure of a novel overhead crane machine tool according to claim 6, characterized in that, The connecting plate (7) has a lateral slider (6) on one side, and a docking screw hole (14) for threaded connection with the docking bolt (13) is provided on one side of the lateral slider (6).

8. The beam structure of a novel overhead crane machine tool according to claim 6, characterized in that, The column (1) has a longitudinal guide rail (2) on one side, and the longitudinal guide rail (2) is slidably connected to the longitudinal slider (5). The column (1) is fixedly connected to a side guide rail (4) at one end near the connecting plate (7), and the side guide rail (4) is slidably connected to the side slider (6).

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