Tool changing device of numerical control machine tool
The CNC machine tool changer uses interlocking gears and belts to align tool holders on two disks, addressing the inefficiency of turret-style systems by reducing rotations and preventing collisions, thus improving tool change speed and safety.
Patent Information
- Application Number
- CN202422032022.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-21
AI Technical Summary
When the tool changer of the existing CNC machine tool is used in the turret tool change system, it takes half a turn to rotate when changing the tool frequently, resulting in wasting time.
Two relatively rotating turntable structures were designed, and the turntable was driven to rotate through the transmission belt and gear system, staggering thirty degrees. The avoidance groove and fixed disk structure were used to shorten the number of turns in exchange for the tool, and the robot was raising the height of the tool barrel to avoid collision with the tool.
It effectively shortens the tool change time, improves the tool change efficiency, avoids the collision between the robot and the tool, and improves production efficiency.
Smart Images
Figure CN223098692U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tool changing for machine tools, and more specifically, particularly relates to a tool changing device for a numerical control machine tool. Background Technique
[0002] The automatic tool changing system of a machine tool is a processing device that realizes the tool changing requirements for continuous machining between part processes. It mainly consists of a tool magazine and a tool changing device. The application of the automatic tool changing system not only improves production efficiency but also reduces labor intensity. It is an indispensable part of modern numerical control machine tools. For the existing tool changing devices of numerical control machine tools, when using a turret tool changing system, it needs to rotate at most half a circle to reach the selected tool, which wastes a lot of time when frequent tool changes are required. Therefore, a tool changing device for a numerical control machine tool is proposed. Content of the Utility Model
[0003] In view of the deficiencies of the prior art, the utility model provides a tool changing device for a numerical control machine tool. Two turntables rotate relative to each other, thus shortening the number of turns to exchange the corresponding tool, so as to solve the problem that for the existing tool changing devices of numerical control machine tools, when using a turret tool changing system, it needs to rotate at most half a circle to reach the selected tool, which wastes a lot of time when frequent tool changes are required as proposed in the above background technique.
[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: A tool changing device for a numerical control machine tool includes a bottom plate and a tool changing manipulator. A motor is fixed to the bottom surface of the bottom plate. The output end of the motor penetrates through the interior of the bottom plate and is coaxially fixed with a first gear. The outer side of the first gear is meshed and connected with a second gear. The bottom surface of the second gear is rotatably connected to the top surface of the bottom plate. The upper ends of the rotating shafts of the first gear and the second gear are both coaxially fixed with a first transmission wheel. The outer sides of the two first transmission wheels are both friction-driven with a transmission belt. The inner side of the transmission belt is meshed and connected with a second transmission wheel. The upper ends of the rotating shafts of the two second transmission wheels are both coaxially fixedly connected with a turntable. Six avoidance grooves are provided on the outer sides of the two turntables. Six sleeves are fixed to the outer sides of the two turntables. The six sleeves are arranged at equal intervals. A tool cylinder is slidably connected to the inner side of each of the six sleeves. A vertical rod is fixed to the lower end of the tool cylinder. A cross rod is fixed to the lower end of the vertical rod. One end of the cross rod points to the center of the turntable. Two fixed disks are fixed to the top surface of the bottom plate. A convex block is fixed to the top surface of each of the two fixed disks. The outer side of the convex block is in sliding contact with the outer side of the cross rod. The outer side of the cross rod is in sliding contact with the top surface of the fixed disk.
[0005] As a preferred technical solution of the utility model, the diameter of the second transmission wheel is larger than that of the first transmission wheel, and the bottom surface of the second transmission wheel is rotatably connected to the top surface of the bottom plate.
[0006] As a preferred technical solution of the present utility model, the two turntables are staggered by thirty degrees from each other.
[0007] As a preferred technical solution of the present utility model, the six avoidance grooves are in a fan-shaped structure, and the six avoidance grooves are arranged at equal intervals.
[0008] As a preferred technical solution of the present utility model, the distance between the centers of the two turntables is less than the sum of the diameters of the two turntables.
[0009] As a preferred technical solution of the present utility model, the centers of the two fixed disks coincide with the centers of the shafts of the two second transmission wheels respectively.
[0010] As a preferred technical solution of the present utility model, the diameters of the two fixed disks are both smaller than the diameters of the two turntables.
[0011] The present utility model provides a tool changing device for a numerical control machine tool, which has the following beneficial effects:
[0012] 1. For this tool changing device of the numerical control machine tool, the two turntables rotate relative to each other, thereby shortening the number of turns for changing the corresponding tool, and solving the problem that in the existing tool changing device of the numerical control machine tool, when using a turret tool changing system, it is necessary to rotate half a turn at the farthest to reach the selected tool, which wastes a lot of time when frequent tool changes are required.
[0013] 2. For this tool changing device of the numerical control machine tool, the height of the corresponding tool cylinder is raised, which is convenient for the tool changing manipulator to pick up the tool and avoids the tool changing manipulator from colliding with the tool. Description of the Drawings
[0014] Figure 1 It is a schematic diagram of the overall structure of a tool changing device for a numerical control machine tool of the present utility model.
[0015] Figure 2 It is a schematic diagram of the split structure of a tool changing device for a numerical control machine tool of the present utility model.
[0016] Figure 3 It is a schematic diagram of the enlarged view at A in a tool changing device for a numerical control machine tool of the present utility model Figure 2 in the present utility model.
[0017] Figure 4 It is a schematic diagram of the enlarged view at B in a tool changing device for a numerical control machine tool of the present utility model Figure 2 in the present utility model.
[0018] In the figure: 1. Base plate; 2. Tool changing manipulator; 3. Motor; 4. First gear; 5. Second gear; 6. First transmission wheel; 7. Transmission belt; 8. Second transmission wheel; 9. Turntable; 10. Avoidance groove; 11. Tool cylinder; 12. Vertical rod; 13. Cross bar; 14. Fixed disk; 15. Convex block; 16. Sleeve. Detailed Description of the Invention
[0019] The following further describes in detail the embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.
[0020] In the description of the present utility model, unless otherwise stated, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0022] Please refer to Figures 1 to 4, the present utility model provides a technical solution: a tool changing device for a numerical control machine tool, including a bottom plate 1 and a tool changing manipulator 2. A motor 3 is fixed to the bottom surface of the bottom plate 1. The output end of the motor 3 penetrates through the interior of the bottom plate 1 and is coaxially fixed with a first gear 4. A second gear 5 is meshed and connected to the outside of the first gear 4. The bottom surface of the second gear 5 is rotatably connected to the top surface of the bottom plate 1. The upper ends of the rotating shafts of the first gear 4 and the second gear 5 are both coaxially fixed with a first transmission wheel 6. A transmission belt 7 is frictionally driven on the outside of both first transmission wheels 6. A second transmission wheel 8 is meshed and connected to the inside of the transmission belt 7. The upper ends of the rotating shafts of both second transmission wheels 8 are coaxially fixedly connected with a turntable 9. Six avoidance grooves 10 are provided on the outside of both turntables 9. Six sleeves 16 are fixed to the outside of both turntables 9. The six sleeves 16 are arranged at equal intervals. A tool cylinder 11 is slidably connected to the inside of each of the six sleeves 16. A vertical rod 12 is fixed to the lower end of the tool cylinder 11. A cross bar 13 is fixed to the lower end of the vertical rod 12. One end of the cross bar 13 points to the center of the turntable 9. Two fixed disks 14 are fixed to the top surface of the bottom plate 1. A convex block 15 is fixed to the top surface of each of the two fixed disks 14. The outside of the convex block 15 is in sliding contact with the outside of the cross bar 13. The outside of the cross bar 13 is in sliding contact with the top surface of the fixed disk 14. The diameter of the second transmission wheel 8 is larger than that of the first transmission wheel 6. The bottom surface of the second transmission wheel 8 is rotatably connected to the top surface of the bottom plate 1. The two turntables 9 are staggered by thirty degrees from each other. The six avoidance grooves 10 are in a fan-shaped structure and are arranged at equal intervals. The distance between the centers of the two turntables 9 is less than the sum of the diameters of the two turntables 9. The centers of the two fixed disks 14 coincide with the centers of the rotating shafts of the two second transmission wheels 8 respectively. The diameters of the two fixed disks 14 are both smaller than the diameters of the two turntables 9;
[0023] The first gear 4 and the second gear 5 are driven to rotate by the motor 3. The first gear 4 and the second gear 5 respectively drive two first driving wheels 6 to rotate. The two first driving wheels 6 respectively drive two second driving wheels 8 to rotate through two transmission belts 7. The two second driving wheels 8 respectively drive two turntables 9 to rotate. Since the two turntables 9 are staggered by thirty degrees from each other and the distance between the centers of the turntables 9 is less than the sum of the diameters of the two turntables 9, the sleeve 16 on one of the turntables 9 is located in the middle of the avoidance groove 10 on the other turntable 9, and is located at the midpoint of the line connecting the centers of the two turntables 9, so as to align with the position where the tool changing manipulator 2 picks up the tool. When the two turntables 9 rotate, the previous sleeve 16 moves out of the middle of the avoidance groove 10, and the next sleeve 16 transfers into the inside of the opposite avoidance groove 10, cycling in turn. During this process, the vertical rod 12 at the bottom of the tool cylinder 11 drives the cross rod 13 to slide along the top surface of the fixed disk 14. When the sleeve 16 outside the tool cylinder 11 transfers into the inside of the opposite avoidance groove 10, the cross rod 13 is lifted by the convex block 15 on the fixed disk 14, so as to raise the height of the tool cylinder 11, facilitating the tool changing manipulator 2 to pick up the tool and avoiding the tool changing manipulator 2 from colliding with the tool. When the sleeve 16 moves out of the middle of the avoidance groove 10, the cross rod 13 disengages from the convex block 15 on the fixed disk 14. Under the action of gravity, the tool cylinder 11 moves downward to return to its original position. Through the above process, the two turntables 9 rotate relative to each other, thus shortening the number of turns for exchanging the corresponding tool, and solving the problem that in the existing tool changing device of a numerical control machine tool, when adopting a turret tool changing system, it needs to rotate half a circle at the farthest to reach the selected tool, wasting a lot of time when frequent tool changing is required.
[0024] Specific usage mode and function of this embodiment: In this utility model, the motor 3 drives the first gear 4 and the second gear 5 to rotate. The first gear 4 and the second gear 5 respectively drive the two first driving wheels 6 to rotate. The two first driving wheels 6 respectively drive the two second driving wheels 8 to rotate through the two transmission belts 7. The two second driving wheels 8 respectively drive the two turntables 9 to rotate. Since the two turntables 9 are staggered by thirty degrees from each other and the distance between the centers of the turntables 9 is less than the sum of the diameters of the two turntables 9, the sleeve 16 on one of the turntables 9 is located in the middle of the avoidance groove 10 on the other turntable 9 and is also located at the midpoint of the line connecting the centers of the two turntables 9, thus aligning with the position where the tool changing manipulator 2 picks up the tool. When the two turntables 9 rotate, the previous sleeve 16 moves out of the middle of the avoidance groove 10, and the next sleeve 16 transfers into the inside of the opposite avoidance groove 10, cycling in turn. During this process, the vertical rod 12 at the bottom of the tool cylinder 11 drives the cross rod 13 to slide along the top surface of the fixed disk 14. When the sleeve 16 outside the tool cylinder 11 transfers into the inside of the opposite avoidance groove 10, the cross rod 13 is lifted by the convex block 15 on the fixed disk 14, thereby raising the height of the tool cylinder 11 to facilitate the tool changing manipulator 2 to pick up the tool and avoid the tool changing manipulator 2 colliding with the tool. When the sleeve 16 moves out of the middle of the avoidance groove 10, the cross rod 13 disengages from the convex block 15 on the fixed disk 14, and under the action of gravity, the tool cylinder 11 moves downward to return to its original position.
[0025] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.
Claims
1. A tool changing device for a numerical control machine tool, comprising a base plate (1) and a tool changing manipulator (2), characterized in that: A motor (3) is fixed to the bottom surface of the bottom plate (1). The output end of the motor (3) penetrates through the inside of the bottom plate (1) and is coaxially fixed with a first gear (4). A second gear (5) is meshed and connected to the outside of the first gear (4). The bottom surface of the second gear (5) is rotatably connected to the top surface of the bottom plate (1). The upper ends of the rotating shafts of the first gear (4) and the second gear (5) are both coaxially fixed with a first transmission wheel (6). A transmission belt (7) is frictionally driven on the outside of the two first transmission wheels (6). A second transmission wheel (8) is meshed and connected to the inside of the transmission belt (7). The upper ends of the rotating shafts of the two second transmission wheels (8) are both coaxially fixedly connected with a turntable (9). Six avoidance grooves (10) are formed on the outside of the two turntables (9). Six sleeves (16) are fixed to the outside of the two turntables (9). The six sleeves (16) are arranged at equal intervals. A cutter cylinder (11) is slidably connected to the inside of each of the six sleeves (16). A vertical rod (12) is fixed to the lower end of the cutter cylinder (11). A cross rod (13) is fixed to the lower end of the vertical rod (12). One end of the cross rod (13) points to the center of the turntable (9). Two fixed disks (14) are fixed to the top surface of the bottom plate (1). A convex block (15) is fixed to the top surface of each of the two fixed disks (14). The outside of the convex block (15) is in sliding contact with the outside of the cross rod (13). The outside of the cross rod (13) is in sliding contact with the top surface of the fixed disk (14).
2. The tool changing device of a numerical control machine tool according to claim 1, characterized in that: The diameter of the second transmission wheel (8) is larger than that of the first transmission wheel (6). The bottom surface of the second transmission wheel (8) is rotatably connected to the top surface of the bottom plate (1).
3. The tool changing device of a numerical control machine tool according to claim 1, characterized in that: The two turntables (9) are staggered by thirty degrees from each other.
4. A tool changing device for a numerical control machine tool according to claim 1, characterized in that: The six avoidance grooves (10) are in a fan-shaped structure and are arranged at equal intervals.
5. A tool changing device for a numerical control machine tool according to claim 1, characterized in that: The distance between the centers of the two turntables (9) is less than the sum of the diameters of the two turntables (9).
6. The tool changing device of a numerical control machine tool according to claim 1, characterized in that: The centers of the two fixed disks (14) coincide with the centers of the rotating shafts of the two second transmission wheels (8) respectively.
7. A tool changing device for a numerical control machine tool according to claim 1, characterized in that: The diameters of the two fixed disks (14) are both smaller than the diameters of the two turntables (9).