Lifting positioning device of lifting platform milling machine

Abstract

The utility model relates to the field of milling machine equipment, and discloses a lifting positioning device of a lifting platform milling machine, which comprises a milling machine, two guide rails are fixedly mounted at the top of the milling machine, ball screws are rotatably mounted on the inner sides of the two guide rails, and sliders are slidably mounted on the inner sides of the two guide rails. The two sliding blocks are arranged on the corresponding ball screws in a threaded and sleeving mode correspondingly. Two stabilizing chambers are formed in the milling machine, and stabilizing mechanisms are arranged in the two stabilizing chambers; a protection sleeve is fixedly installed on the inner wall of the bottom of the milling machine, and a protection mechanism is arranged on the protection sleeve. Compared with the prior art, the universal driving shaft clamping device has the following advantages and effects that after the lifting platform moves to a designated position, the universal driving shaft can be clamped, so that the situation that the position of the lifting platform is affected by deviation, rotation and the like caused by vibration when the ball screw is machined by a milling machine is prevented, the machining stability and accuracy are improved, and the machining efficiency is improved. And in addition, when the ball screw breaks down, the falling speed of the lifting table can be slowed down.

Description

Technical Field

[0001] This utility model relates to the field of milling machine equipment technology, and in particular to a lifting and positioning device for a lifting table milling machine. Background Technology

[0002] A milling machine is a machine tool that uses a rotating cutting tool to cut and shape a workpiece. It is mainly used to machine various surface shapes such as planes, grooves, gears, and cavities. During operation, the workpiece is fixed on the worktable, the cutting tool is mounted on the spindle and performs the main rotary motion, while the worktable drives the workpiece in the feed motion. Material removal is achieved through the relative motion between the cutting tool and the workpiece. Based on their structure and machining characteristics, milling machines can be classified into horizontal milling machines, vertical milling machines, gantry milling machines, etc. They are widely used in mechanical manufacturing, mold making, aerospace, and other fields, and are an indispensable piece of equipment in modern machining.

[0003] In related technologies, to facilitate milling machine processing of workpieces, most current milling machine processing tables are height-adjustable. However, existing height-adjustable milling machines are prone to vibration during workpiece processing. This vibration can cause the ball screw controlling the height of the lifting table to rotate, which in turn causes the slider on it to move, resulting in the lifting table moving up or down. This can easily lead to collisions between cutting tools or workpiece scrapping, making stable processing difficult and posing significant safety hazards. Furthermore, most existing lifting tables lack fall protection devices. When the ball screw or other structures malfunction, the lifting table will fall directly due to inertia, posing a significant safety hazard.

[0004] Therefore, we propose a lifting and positioning device for a milling machine with a lifting table to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a lifting and positioning device for a milling machine with a lifting platform, which has the effects of precise lifting and positioning and preventing the lifting platform from falling.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a lifting and positioning device for a milling machine with a lifting table, comprising a milling machine, wherein two guide rails are fixedly installed on the top of the milling machine, ball screws are rotatably installed on the inner side of each of the two guide rails, and sliders are slidably installed on the inner side of each of the two guide rails, and the two sliders are respectively threaded onto the corresponding ball screws; two stabilizing chambers are opened inside the milling machine, and stabilizing mechanisms are provided inside the two stabilizing chambers; a protective sleeve is fixedly installed on the inner wall of the bottom of the milling machine, and a protective mechanism is provided on the protective sleeve.

[0007] A further feature of this invention is that the same lifting metal block is fixedly installed on the side of the two sliders that are close to each other, a lifting platform is slidably installed on one side of the milling machine, a lifting groove is provided at the bottom of the lifting platform, and the outer side of the lifting metal block is fixedly connected to the four inner walls of the lifting groove.

[0008] By adopting the above technical solution, the lifting platform can be moved by lifting metal blocks.

[0009] A further feature of this invention is that the protective sleeve slides through the lifting metal block.

[0010] By adopting the above technical solution, collisions between the lifting metal block and the protective sleeve can be prevented during the lifting and moving process.

[0011] A further feature of this invention is that the protective mechanism includes a damper, a protective column, and a piston. The damper is fixedly installed on the top inner wall of the lifting groove, and the protective column is fixedly installed at the bottom of the damper. The bottom end of the protective column extends into the protective sleeve, and the piston is fixedly installed at the bottom end of the protective column. The piston is slidably installed on the inner side of the protective sleeve.

[0012] By adopting the above technical solution, the damper is used to fix the protective column and work with the piston and hydraulic oil to achieve buffering.

[0013] A further feature of this invention is that the protective sleeve is filled with hydraulic oil, the bottom of the piston has multiple damping holes, a sealing ring is fixedly installed on the top of the protective sleeve, and the inner side of the sealing ring is in sliding contact with the protective column.

[0014] By adopting the above technical solution, damping force can be generated by the oil, thereby slowing down the falling speed of the lifting platform.

[0015] A further feature of this invention is that the bottom ends of the two ball screws extend into the corresponding stabilizing chambers, and a linkage shaft is fixedly installed at the bottom ends of both ball screws.

[0016] By adopting the above technical solution, the ball screw can be driven to rotate through the linkage shaft.

[0017] A further feature of this invention is that a synchronous servo motor is fixedly installed on the bottom inner wall of each of the two stabilizing chambers, and the output shafts of the two synchronous servo motors are respectively fixedly connected to the corresponding linkage shafts.

[0018] By adopting the above technical solution, a synchronous servo motor can drive the linkage shaft to rotate.

[0019] The present invention is further configured as follows: the stabilizing mechanism includes a stabilizing base, six fixed columns, six flip bars, and six clamps. The stabilizing base is fixedly installed on the bottom inner wall of the stabilizing chamber. Six flip grooves are opened on the outer side of the stabilizing base. Fixed columns are fixedly installed on the inner side of each of the six flip grooves. Flip bars are rotatably sleeved on each of the six fixed columns. Clamps are fixedly installed on one side of each of the six flip bars. All six clamps clamp the same linkage shaft.

[0020] By adopting the above technical solution, the ball screw can be prevented from being affected by vibration during milling, thus preventing it from shifting or rotating.

[0021] A further feature of this invention is that a stabilizing ring is slidably installed on the inner side of the stabilizing base, a spring is fixedly installed at the bottom of the stabilizing ring, the other end of the spring is fixedly connected to the bottom inner wall of the stabilizing chamber, an annular groove is provided on the outer side of the stabilizing ring, and six linkage metal blocks are slidably installed on the inner side of the annular groove, with the six linkage metal blocks respectively hinged to the corresponding flip bars.

[0022] By adopting the above technical solution, the corresponding flipping strip can be flipped by the linkage metal block.

[0023] A further feature of this invention is that the top of the stabilizing base has two drive slots, and a stabilizing metal strip is fixedly installed on the inner side of each of the two drive slots. Both stabilizing metal strips are fixedly connected to the same stabilizing ring. Two cylinders are fixedly installed on the top inner wall of the stabilizing chamber, and the piston ends of the two cylinders are respectively fixedly connected to the corresponding stabilizing metal strips.

[0024] By adopting the above technical solution, the stabilizing ring can be moved by a cylinder.

[0025] This application includes at least one of the following beneficial technical effects:

[0026] 1. This application utilizes a stabilizing mechanism consisting of a stabilizing base and a clamp to clamp the linkage shaft after the ball screw drives the slider to a designated position. This prevents the ball screw from being affected by vibration during milling, thus avoiding deviation or rotation and increasing the stability and accuracy of the machining process.

[0027] 2. This application utilizes a protective mechanism consisting of a protective sleeve and a piston to slow down the descent speed of the lifting platform when the ball screw malfunctions, preventing excessive speed from damaging the equipment and increasing the safety of the equipment. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of a lifting and positioning device for a milling machine with a lifting table, as proposed in this utility model.

[0030] Figure 2 This is a three-dimensional cross-sectional view of a lifting and positioning device for a milling machine with a lifting table, as proposed in this utility model.

[0031] Figure 3 This is a front sectional view of the stabilizing mechanism and the protective mechanism of the lifting and positioning device for a milling machine with a lifting table, as proposed in this utility model.

[0032] Figure 4 This is a three-dimensional structural disassembly diagram of the protective mechanism of the lifting and positioning device of a milling machine with a lifting table proposed in this utility model.

[0033] Figure 5 This is a three-dimensional structural diagram of the stabilizing mechanism of the lifting and positioning device for a milling machine with a lifting table, as proposed in this utility model.

[0034] Figure 6 This is a three-dimensional structural breakdown diagram of the stabilizing mechanism of the lifting and positioning device for a milling machine with a lifting table, as proposed in this utility model.

[0035] In the diagram, 1. Milling machine; 2. Lifting platform; 3. Guide rail; 4. Damper; 5. Protective column; 6. Piston; 7. Protective sleeve; 8. Sealing ring; 9. Ball screw; 10. Slider; 11. Linkage shaft; 12. Synchronous servo motor; 13. Stabilizing base; 14. Fixed column; 15. Stabilizing ring; 16. Stabilizing metal strip; 17. Cylinder; 18. Tilting bar; 19. Clamp; 20. Linkage metal block; 21. Spring; 22. Lifting metal block. Detailed Implementation

[0036] Reference Figure 1-6 A lifting and positioning device for a milling machine with a lifting table includes a milling machine 1. Two guide rails 3 are fixedly installed on the top of the milling machine 1. Ball screws 9 are rotatably installed on the inner side of each of the two guide rails 3. Slider 10s are slidably installed on the inner side of each of the two guide rails 3. The two sliders 10 are threaded onto the corresponding ball screws 9. Two stabilizing chambers are opened inside the milling machine 1. Stabilizing mechanisms are provided inside the two stabilizing chambers. A protective sleeve 7 is fixedly installed on the inner wall of the bottom of the milling machine 1. A protective mechanism is provided on the protective sleeve 7.

[0037] In this embodiment, the same lifting metal block 22 is fixedly installed on the side of the two sliders 10 that are close to each other. A lifting platform 2 is slidably installed on one side of the milling machine 1. A lifting groove is opened at the bottom of the lifting platform 2. The outer side of the lifting metal block 22 is fixedly connected to the four inner walls of the lifting groove. The lifting platform 2 can be moved by the lifting metal block 22.

[0038] In this embodiment, the protective sleeve 7 slides through the lifting metal block 22 to prevent the lifting metal block 22 from colliding with the protective sleeve 7 when it moves up and down.

[0039] In this embodiment, the protective mechanism includes a damper 4, a protective column 5, and a piston 6. The damper 4 is fixedly installed on the top inner wall of the lifting groove, and the protective column 5 is fixedly installed at the bottom of the damper 4. The bottom end of the protective column 5 extends into the protective sleeve 7, and the piston 6 is fixedly installed at the bottom end of the protective column 5. The piston 6 is slidably installed on the inner side of the protective sleeve 7. The damper 4 is used to fix the protective column 5 and works with the piston 6 and hydraulic oil to achieve buffering.

[0040] In this embodiment, the protective sleeve 7 is filled with hydraulic oil, the bottom of the piston 6 is provided with multiple damping holes, and the top of the protective sleeve 7 is fixedly installed with a sealing ring 8. The inner side of the sealing ring 8 slides in contact with the protective column 5, and can generate damping force through the oil, thereby slowing down the falling speed of the lifting platform 2.

[0041] In this embodiment, the bottom ends of the two ball screws 9 extend into the corresponding stabilizing chambers, and the bottom ends of the two ball screws 9 are fixedly installed with a linkage shaft 11, which can drive the ball screws 9 to rotate.

[0042] In this embodiment, synchronous servo motors 12 are fixedly installed on the bottom inner walls of the two stabilizing chambers. The output shafts of the two synchronous servo motors 12 are fixedly connected to the corresponding linkage shafts 11, and the linkage shafts 11 can be rotated by the synchronous servo motors 12.

[0043] In this embodiment, the stabilizing mechanism includes a stabilizing base 13, six fixed posts 14, six flip bars 18, and six clamps 19. The stabilizing base 13 is fixedly installed on the bottom inner wall of the stabilizing chamber. Six flip grooves are opened on the outer side of the stabilizing base 13. Fixed posts 14 are fixedly installed on the inner side of each of the six flip grooves. Flip bars 18 are rotatably sleeved on each of the six fixed posts 14. Clamps 19 are fixedly installed on one side of each of the six flip bars 18. All six clamps 19 clamp the same linkage shaft 11, thereby preventing the ball screw 9 from being affected by vibration during milling on the milling machine 1, which could lead to deviation or rotation.

[0044] In this embodiment, a stabilizing ring 15 is slidably installed on the inner side of the stabilizing base 13, and a spring 21 is fixedly installed on the bottom of the stabilizing ring 15. The other end of the spring 21 is fixedly connected to the bottom inner wall of the stabilizing chamber. An annular groove is opened on the outer side of the stabilizing ring 15, and six linkage metal blocks 20 are slidably installed on the inner side of the annular groove. The six linkage metal blocks 20 are respectively hinged to the corresponding flip bars 18, and the corresponding flip bars 18 can be flipped by the linkage metal blocks 20.

[0045] In this embodiment, the top of the stabilizing base 13 has two drive slots, and stabilizing metal strips 16 are fixedly installed on the inner side of each drive slot. Both stabilizing metal strips 16 are fixedly connected to the same stabilizing ring 15. Two cylinders 17 are fixedly installed on the top inner wall of the stabilizing chamber. The piston ends of the two cylinders 17 are fixedly connected to the corresponding stabilizing metal strips 16, and the stabilizing ring 15 can be moved by the cylinders 17.

[0046] Working principle: When adjusting the lifting platform 2, the operator starts two synchronous servo motors 12. The two synchronous servo motors 12 drive the corresponding linkage shafts 11 to rotate. The rotation of the two linkage shafts 11 drives the corresponding ball screws 9 to rotate. The rotation of the two ball screws 9 drives the corresponding sliders 10 to move up and down. The movement of the two sliders 10 drives the same lifting metal block 22 to move, thereby driving the lifting platform 2 to move up and down. When the lifting platform 2 moves to the designated position, the operator starts four cylinders 17. The four cylinders 17 drive the corresponding stabilizing metal bars 16 to move. The four stabilizing metal bars 16 drive the corresponding stabilizing rings 15 to move. The outer side of each of the two stabilizing rings 15 has annular grooves. The inner side of each of the two annular grooves has six linkage metal blocks 20 slidably installed. The twelve linkage metal blocks 20 are respectively hinged to the corresponding tilting bars 18. Therefore, the movement of the twelve linkage metal blocks 20 drives the corresponding tilting bars 18 to move up and down. 8. The twelve rotating bars 18 are all rotated and sleeved on the corresponding fixed columns 14. Therefore, the twelve rotating bars 18 can only rotate around the corresponding fixed columns 14 as the center. The rotation of the twelve rotating bars 18 drives the corresponding clamps 19 to clamp the corresponding linkage shafts 11, thereby preventing the ball screw 9 from being affected by vibration during milling machine 1, resulting in deviation or rotation. This increases the stability during processing. In case of a sudden emergency and failure of the ball screw 9, the lifting platform 2 loses its support and falls. At this time, the lifting platform 2 drives the protective column 5 to fall, and the protective column 5 drives the piston 6 to fall. The piston 6 squeezes the hydraulic oil in the lower half of the protective sleeve 7. The oil is forced to flow upward through the damping hole on the piston 6. Since the damping hole restricts the oil flow rate, it generates damping force, absorbs the impact energy and converts it into heat energy for dissipation, thereby greatly reducing the speed and impact of the falling of the lifting platform 2 and increasing the safety of the equipment.

[0047] The technological advancements of this invention compared to existing technologies are as follows: after the ball screw 9 drives the slider 10 to a designated position, the linkage shaft 11 can be clamped, thereby preventing the ball screw 9 from being affected by vibration during milling on the milling machine 1, which could lead to offset or rotation, thus increasing the stability and accuracy of the machining process. Furthermore, in the event of a malfunction in the ball screw 9, the descent speed of the lifting table 2 can be slowed down to prevent excessive speed from damaging the equipment, thereby increasing the safety of the equipment.

[0048] The above provides a detailed description of a lifting and positioning device for a milling machine with a lifting table, as provided in this application. Specific embodiments have been used to illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A lifting and positioning device for a milling machine with a lifting table, characterized in that, The milling machine (1) has two guide rails (3) fixedly installed on its top. Ball screws (9) are rotatably installed on the inner side of each guide rail (3). Sliders (10) are slidably installed on the inner side of each guide rail (3). The two sliders (10) are threaded onto the corresponding ball screws (9). The milling machine (1) has two stabilizing chambers inside, and each of the two stabilizing chambers is equipped with a stabilizing mechanism. A protective sleeve (7) is fixedly installed on the bottom inner wall of the milling machine (1), and a protective mechanism is provided on the protective sleeve (7).

2. The lifting and positioning device for a milling machine with a lifting table according to claim 1, characterized in that: The same lifting metal block (22) is fixedly installed on the side of the two sliders (10) that are close to each other. A lifting platform (2) is slidably installed on one side of the milling machine (1). A lifting groove is opened at the bottom of the lifting platform (2). The outer side of the lifting metal block (22) is fixedly connected to the four inner walls of the lifting groove.

3. The lifting and positioning device for a milling machine with a lifting table according to claim 2, characterized in that: The protective sleeve (7) slides through the lifting metal block (22).

4. The lifting and positioning device for a milling machine with a lifting table according to claim 3, characterized in that: The protective mechanism includes a damper (4), a protective column (5), and a piston (6). The damper (4) is fixedly installed on the top inner wall of the lifting groove. The protective column (5) is fixedly installed at the bottom of the damper (4). The bottom end of the protective column (5) extends into the protective sleeve (7). The piston (6) is fixedly installed at the bottom end of the protective column (5). The piston (6) is slidably installed on the inner side of the protective sleeve (7).

5. The lifting and positioning device for a milling machine with a lifting table according to claim 4, characterized in that: The protective sleeve (7) is filled with hydraulic oil. The bottom of the piston (6) has multiple damping holes. A sealing ring (8) is fixedly installed on the top of the protective sleeve (7). The inner side of the sealing ring (8) is in sliding contact with the protective column (5).

6. The lifting and positioning device for a milling machine with a lifting table according to claim 1, characterized in that: The bottom ends of the two ball screws (9) extend into the corresponding stabilizing chambers, and the bottom ends of the two ball screws (9) are fixedly installed with a linkage shaft (11).

7. The lifting and positioning device for a milling machine with a lifting table according to claim 6, characterized in that: Synchronous servo motors (12) are fixedly installed on the bottom inner walls of the two stabilizing chambers, and the output shafts of the two synchronous servo motors (12) are fixedly connected to the corresponding linkage shafts (11).

8. The lifting and positioning device for a milling machine with a lifting table according to claim 7, characterized in that: The stabilizing mechanism includes a stabilizing base (13), six fixed posts (14), six flip bars (18), and six clamps (19). The stabilizing base (13) is fixedly installed on the bottom inner wall of the stabilizing chamber. Six flip grooves are opened on the outer side of the stabilizing base (13). Fixed posts (14) are fixedly installed on the inner side of each of the six flip grooves. Flip bars (18) are rotatably sleeved on each of the six fixed posts (14). Clamps (19) are fixedly installed on one side of each of the six flip bars (18). All six clamps (19) clamp the same linkage shaft (11).

9. The lifting and positioning device for a milling machine with a lifting table according to claim 8, characterized in that: A stabilizing ring (15) is slidably installed on the inner side of the stabilizing base (13). A spring (21) is fixedly installed at the bottom of the stabilizing ring (15). The other end of the spring (21) is fixedly connected to the bottom inner wall of the stabilizing chamber. An annular groove is opened on the outer side of the stabilizing ring (15). Six linkage metal blocks (20) are slidably installed on the inner side of the annular groove. The six linkage metal blocks (20) are respectively hinged to the corresponding flip bars (18).

10. The lifting and positioning device for a milling machine with a lifting table according to claim 9, characterized in that: The top of the stabilizing base (13) has two drive slots, and stabilizing metal strips (16) are fixedly installed on the inner side of the two drive slots. The two stabilizing metal strips (16) are fixedly connected to the same stabilizing ring (15). Two cylinders (17) are fixedly installed on the top inner wall of the stabilizing chamber. The piston ends of the two cylinders (17) are fixedly connected to the corresponding stabilizing metal strips (16).

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