Automatic tool changing device for vertical milling machine

Abstract

The utility model relates to the technical field of vertical milling machines, in particular to an automatic tool changing device for a vertical milling machine, which is provided with a liftable rotary disc for changing a milling cutter connected with the rotary disc, so that the tool changing efficiency is improved, and the practicability is improved; comprising a rack, a milling driving motor, a milling cutter connecting sleeve, a connecting frame, a lifting driving motor, a threaded rod, a lifting inner threaded pipe, a constraint sliding sleeve, a bearing, a rotating disc, a rotating constraint sleeve, a milling cutter and a milling cutter connector, the middle front side of the top end of the rack is connected with the bottom end of the milling driving motor, and the output end of the milling driving motor is connected with the top end of the milling cutter connecting sleeve; the rear side of the top end of the rack is connected with the bottom end of a connecting frame, the middle of the top end of the connecting frame is connected with the bottom end of a lifting driving motor, and the output end of the lifting driving motor is connected with the top end of a threaded rod. A rotary driving mechanism is further arranged on the rear side of the rack.

Description

Technical Field

[0001] This utility model relates to the technical field of vertical milling machines, specifically to an automatic tool changer for vertical milling machines. Background Technology

[0002] Compared to horizontal milling machines, the main difference between vertical and horizontal milling machines is the vertical spindle arrangement. Besides the spindle arrangement, the worktable can be raised and lowered. Vertical milling machines offer more flexibility in the use of milling cutters, making them more versatile. They can use end mills, indexable cutters, drills, etc., and can mill keyways, planes, and bore holes. Horizontal milling machines can also use the same types of cutters, but it's not as convenient as vertical milling machines. This is mainly because they can use hangers to enhance the strength of the cutters (primarily three-sided end mills and vane cutters). They can mill grooves, planes, and cut off sections.

[0003] The cutting tools of vertical milling machines need to be replaced as needed. For example, there is a multi-functional milling machine with convenient tool changing, such as the one with patent announcement number CN220295944U. It is equipped with a screw, tool holder, pull rod, pull head, nut, fixing ring and positioning rod. Rotating the nut makes it move on the screw, which can make the two pull rods move down. The pull rods move down and the two pull heads separate from the fixing ring. At this time, the milling cutter can be removed from the tool holder, which is convenient for replacing milling cutters of other sizes.

[0004] However, the device requires manual operation, resulting in low efficiency and poor work efficiency. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an automatic tool changer for vertical milling machines, which features a milling cutter replacement mechanism connected to a liftable rotary table, thereby improving tool changing efficiency and practicality.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an automatic tool changer for a vertical milling machine, comprising a frame, a milling drive motor, a milling cutter connecting sleeve, a connecting frame, a lifting drive motor, a threaded rod, a lifting internal threaded tube, a constraint sleeve, a bearing, a turntable, a rotating constraint sleeve, a milling cutter, and a milling cutter connecting head. The front side of the top of the frame is connected to the bottom of the milling drive motor, the output end of the milling drive motor is connected to the top of the milling cutter connecting sleeve, the rear side of the top of the frame is connected to the bottom of the connecting frame, and the middle of the top of the connecting frame is connected to the bottom of the lifting drive motor. The lifting drive motor output end is connected to the top of the threaded rod, the outer wall of the threaded rod is screwed to the inner wall of the lifting internal threaded tube, the inner side of the rear of the frame is connected to the outer side of the constraint sleeve, the inner wall of the constraint sleeve is vertically slidably connected to the outer wall of the lifting internal threaded tube, the bottom end of the lifting internal threaded tube is rotatably connected to the middle of the top of the turntable via a bearing, and multiple sets of rotating constraint sleeves are arranged circumferentially inside the turntable. The inner side of each set of rotating constraint sleeves is rotatably connected to the outer side of the upper part of a set of milling cutters, the top of the milling cutter is connected to the bottom end of the milling cutter connector, and a rotary drive mechanism is also provided on the rear side of the frame.

[0009] Preferably, the rotary drive mechanism includes an external gear ring, a connecting frame, a rotary drive motor, and a rack gear. The rear side of the frame is connected to the outer side of the middle of the rotary drive motor via the connecting frame. The output end of the rotary drive motor is connected to the middle of the top of the rack gear. The outer ring side of the turntable is connected to the inner side of the external gear ring. The external gear ring and the rack gear are in movably meshed.

[0010] Preferably, it also includes a chamfer, wherein the bottom side inside the milling cutter connecting sleeve is provided with a chamfer.

[0011] Preferably, it also includes an oil injection nozzle, wherein the lower right side of the constraint sleeve is connected to the inner side of the oil injection nozzle.

[0012] Preferably, it also includes an oil filling cap, wherein the outer side of the oil filling nozzle and the inner side of the oil filling cap are detachably installed.

[0013] Preferably, it also includes a dustproof corrugated sleeve, wherein the outer side of the threaded rod at the top of the inner end of the connecting frame is connected to the outer side of the constraint sliding sleeve at the top of the frame.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides an automatic tool changer for a vertical milling machine, which has the following advantages:

[0016] When the lifting drive motor runs, the threaded rod rotates under the connection of the connecting frame. The threaded rod engages with the lifting internal threaded tube and slides downward under the constraint of the constraint sleeve. Then, through the action of the rotary drive mechanism, the turntable rotates under the constraint of the bearing, moving the required milling cutter to the position of the vertical corresponding milling cutter connecting sleeve. Then, the lifting drive motor runs in reverse, causing the threaded rod to engage with the lifting internal threaded tube and slide upward under the constraint of the constraint sleeve. The milling cutter connecting head of the set of milling cutters is inserted into the milling cutter connecting sleeve. Then, the milling drive motor runs, driving the milling cutter to rotate under the constraint of the rotating constraint sleeve through the linkage of the milling cutter connecting sleeve and the milling cutter connecting head, thereby acting on the workpiece for milling. The milling cutter replacement is set with a milling cutter connected by a liftable rotary table, which improves the tool changing efficiency and enhances practicality. Attached Figure Description

[0017] Figure 1 This is an axial view of the structural schematic diagram of this utility model;

[0018] Figure 2 This utility model Figure 1 Front view;

[0019] Figure 3 This utility model Figure 1 The right view;

[0020] Figure 4 This utility model Figure 1 Rear view.

[0021] The following components are labeled in the attached diagram: 1. Frame; 2. Milling drive motor; 3. Milling cutter connecting sleeve; 4. Connecting frame; 5. Lifting drive motor; 6. Threaded rod; 7. Lifting internal threaded tube; 8. Constraint sleeve; 9. Bearing; 10. Turntable; 11. Rotation constraint sleeve; 12. Milling cutter; 13. Milling cutter connector; 14. External gear ring; 15. Connecting frame; 16. Rotary drive motor; 17. Long gear; 18. Chamfer; 19. Oil nozzle; 20. Oil cap; 21. Dustproof corrugated sleeve. Detailed Implementation

[0022] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0023] Please see Figure 1-4An automatic tool changer for a vertical milling machine includes a frame 1, a milling drive motor 2, a milling cutter connecting sleeve 3, a connecting frame 4, a lifting drive motor 5, a threaded rod 6, a lifting internal threaded tube 7, a constraint sleeve 8, a bearing 9, a turntable 10, a rotation constraint sleeve 11, a milling cutter 12, and a milling cutter connector 13. The front top of the frame 1 is connected to the bottom of the milling drive motor 2, the output end of the milling drive motor 2 is connected to the top of the milling cutter connecting sleeve 3, and the rear top of the frame 1 is connected to the bottom of the connecting frame 4. The top center of the connecting frame 4 is connected to the bottom of the lifting drive motor 5. The output end of the lifting drive motor 5 is connected to the top of the threaded rod 6. The outer wall of the threaded rod 6 is screwed to the inner wall of the lifting internal threaded tube 7. The inner rear side of the frame 1 is connected to the outer side of the constraint sleeve 8. The inner wall of the constraint sleeve 8 is vertically slidably connected to the outer wall of the lifting internal threaded tube 7. The bottom end of the lifting internal threaded tube 7 is rotatably connected to the top center of the turntable 10 via the bearing 9. Multiple sets of rotating constraint sleeves 11 are arranged circumferentially inside the turntable 10. Each set... The inner side of the rotating constraint sleeve 11 is rotatably connected to the outer side of the upper part of a set of milling cutters 12. The top end of the milling cutter 12 is connected to the bottom end of the milling cutter connector 13. A rotating drive mechanism is also provided on the rear side of the frame 1. When the lifting drive motor 5 runs, under the connection of the connecting frame 4, the threaded rod 6 rotates. The threaded rod 6 is screwed into the lifting internal threaded tube 7 and is constrained by the constraint sleeve 8 to slide downward. Then, through the action of the rotating drive mechanism, the turntable 10 rotates under the constraint of the bearing 9, moving the required milling cutter 12 to the position of the vertical corresponding milling cutter connector 3. Then, the lifting drive motor 5 runs in reverse, so that the threaded rod 6 is screwed into the lifting internal threaded tube 7 and the lifting internal threaded tube 7 slides upward under the constraint of the constraint sleeve 8. The milling cutter connector 13 of the set of milling cutters 12 is inserted into the milling cutter connector 3. Then, the milling drive motor 2 runs, and through the linkage of the milling cutter connector 3 and the milling cutter connector 13, it drives the milling cutter 12 to rotate under the constraint of the rotating constraint sleeve 11, thereby acting on the workpiece milling.

[0024] The rotary drive mechanism includes an external gear ring 14, a connecting frame 15, a rotary drive motor 16, and a rack gear 17. The rear side of the frame 1 is connected to the outer side of the middle of the rotary drive motor 16 via the connecting frame 15. The output end of the rotary drive motor 16 is connected to the middle of the top of the rack gear 17. The outer ring side of the turntable 10 is connected to the inner side of the external gear ring 14. The external gear ring 14 and the rack gear 17 are in movable meshing. When the rotary drive motor 16 runs, the rack gear 17 rotates under the connection of the connecting frame 15. The rack gear 17 meshes with the external gear ring 14, which drives the turntable 10 to rotate, thereby changing the milling cutter 12.

[0025] It also includes a chamfer 18. The bottom side of the inner side of the milling cutter connecting sleeve 3 is provided with a chamfer 18. The chamfer 18 allows the milling cutter to be guided into the milling cutter connecting sleeve 3 when the milling cutter connector 13 is moving upward, avoiding jamming and improving reliability.

[0026] It also includes an oil injection nozzle 19, which is connected to the inner side of the right side of the constraint sleeve 8; oil can be injected into the inner wall of the constraint sleeve 8 through the oil injection nozzle 19 for convenient lubrication and maintenance.

[0027] It also includes an oil filling cap 20, and the outer side of the oil filling nozzle 19 and the inner side of the oil filling cap 20 can be detachably installed; after the oil filling cap 20 is installed on the outer side of the oil filling nozzle 19, the inside of the oil filling nozzle 19 can be sealed and protected, improving reliability.

[0028] It also includes a dustproof corrugated sleeve 21. The outer side of the threaded rod 6 at the top of the inner end of the connecting frame 4 is connected to the outer side of the constraint sliding sleeve 8 at the top of the frame 1. The dustproof corrugated sleeve 21 can shield and protect the threaded rod 6 from dust, thus preventing dust from sticking to its surface and improving reliability.

[0029] In summary, when an automatic tool changer for a vertical milling machine is in use, the lifting drive motor 5 operates, causing the threaded rod 6 to rotate under the connection of the connecting frame 4. The threaded rod 6 is screwed into the lifting internal threaded tube 7, which is then constrained by the constraint sleeve 8 to slide downwards. Then, the rotation drive motor 16 operates, causing the long gear 17 to rotate under the connection of the connecting frame 15. The long gear 17 meshes with the external gear ring 14, which drives the turntable 10 to move. The turntable 10 rotates under the constraint of the bearing 9, moving the required milling cutter 12 to the position corresponding to the vertical milling cutter connecting sleeve 3. Then, the lifting drive motor 5 reverses its operation, causing the threaded rod 6 to screw into the lifting internal threaded tube 7, thus moving the lifting internal threaded tube downwards. The tube 7 slides upward under the constraint of the constraint sleeve 8. After the chamfer 18, it can be guided into the milling cutter connecting sleeve 3 when the milling cutter connecting head 13 is upward, avoiding jamming. The milling cutter connecting head 13 of the set of milling cutters 12 is inserted into the milling cutter connecting sleeve 3. Then the milling drive motor 2 runs, and through the linkage of the milling cutter connecting sleeve 3 and the milling cutter connecting head 13, it drives the milling cutter 12 to rotate under the constraint of the rotating constraint sleeve 11, thereby acting on the workpiece for milling. In addition, oil can be injected into the inner wall of the constraint sleeve 8 through the oil injection nozzle 19 for convenient lubrication and maintenance. After the oil injection cap 20 is installed on the outside of the oil injection nozzle 19, the inside of the oil injection nozzle 19 can be sealed and protected. The dustproof corrugated sleeve 21 can shield and protect the outside of the threaded rod 6, preventing dust from sticking to its surface and improving reliability.

[0030] The milling drive motor 2, the lifting drive motor 5, and the rotary drive motor 16 are commercially available devices known to those skilled in the art. We are simply using them here without making any structural or functional improvements, and we will not elaborate further on them here.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic tool changer for a vertical milling machine, characterized in that, The components include a frame (1), a milling drive motor (2), a milling cutter connecting sleeve (3), a connecting frame (4), a lifting drive motor (5), a threaded rod (6), a lifting internal threaded tube (7), a constraint sleeve (8), a bearing (9), a turntable (10), a rotation constraint sleeve (11), a milling cutter (12), and a milling cutter connector (13). The front side of the top of the frame (1) is connected to the bottom of the milling drive motor (2), the output end of the milling drive motor (2) is connected to the top of the milling cutter connecting sleeve (3), the rear side of the top of the frame (1) is connected to the bottom of the connecting frame (4), the middle part of the top of the connecting frame (4) is connected to the bottom of the lifting drive motor (5), and the output of the lifting drive motor (5) is... The end is connected to the top of the threaded rod (6), the outer wall of the threaded rod (6) is screwed to the inner wall of the lifting internal threaded tube (7), the inner side of the rear part of the frame (1) is connected to the outer side of the constraint sleeve (8), the inner wall of the constraint sleeve (8) is vertically slidably connected to the outer wall of the lifting internal threaded tube (7), the bottom end of the lifting internal threaded tube (7) is rotatably connected to the middle of the top of the turntable (10) via the bearing (9), and multiple sets of rotating constraint sleeves (11) are arranged in a circumferential direction inside the turntable (10). The inner side of each set of rotating constraint sleeves (11) is rotatably connected to the outer side of the upper part of a set of milling cutters (12), the top end of the milling cutter (12) is connected to the bottom end of the milling cutter connector (13), and a rotary drive mechanism is also provided on the rear side of the frame (1).

2. The automatic tool changer for a vertical milling machine according to claim 1, characterized in that: The rotary drive mechanism includes an external gear ring (14), a connecting frame (15), a rotary drive motor (16), and a rack gear (17). The rear side of the frame (1) is connected to the outer side of the middle of the rotary drive motor (16) via the connecting frame (15). The output end of the rotary drive motor (16) is connected to the middle of the top of the rack gear (17). The outer ring side of the turntable (10) is connected to the inner side of the external gear ring (14). The external gear ring (14) and the rack gear (17) are in active meshing.

3. The automatic tool changer for a vertical milling machine according to claim 1, characterized in that: It also includes a chamfer (18), and the bottom side of the inside of the milling cutter connecting sleeve (3) is provided with a chamfer (18).

4. The automatic tool changer for a vertical milling machine according to claim 1, characterized in that: It also includes an oil injection nozzle (19), and the lower right side of the constraint sleeve (8) is connected to the inner side of the oil injection nozzle (19).

5. An automatic tool changer for a vertical milling machine according to claim 4, characterized in that: It also includes an oil filling cap (20), the outer side of the oil filling nozzle (19) and the inner side of the oil filling cap (20) can be detachably installed.

6. The automatic tool changer for a vertical milling machine according to claim 1, characterized in that: It also includes a dustproof corrugated sleeve (21), on the outside of the threaded rod (6) at the top of the inner end of the connecting frame (4) and on the outside of the constraint sleeve (8) at the top of the frame (1).

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