High-precision numerical control mechanism

Abstract

The utility model discloses a high-precision numerical control mechanism which comprises a base, and a workbench is arranged in the middle of the upper end face of the base. The clamping and positioning mechanism is arranged in the working table, the clamping and positioning mechanism comprises a driving seat, a rotating disc is installed above the driving seat, the rotating disc is located in the working table, and a servo motor used for driving the rotating disc is installed at the upper end of the interior of the driving seat; the clamping sliding blocks are annularly installed at the upper end of the workbench at equal intervals, the number of the clamping sliding blocks is four, the clamping sliding blocks are in sliding fit with guide sliding grooves in the workbench, connecting rods are installed between the bottoms of the clamping sliding blocks and the bottom of the rotating disc, and the connecting rods are of an L-shaped structure. And the two ends of the connecting rod are connected with the clamping sliding block and the rotating disc through rotating shafts correspondingly, a clamping block is integrally formed on the upper end face of the clamping sliding block, and the problems that a numerical control mechanism is too complex in structure and poor in overall positioning effect are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a high-precision numerical control mechanism. Background Art

[0002] The CNC mechanism is the actuator in the CNC machine tool. It drives the main body of the machine tool to work according to the predetermined trajectory and parameters by receiving instructions from the CNC device, thereby completing the processing of the workpiece. It includes linear guides, slides, balancers, lead screws and other components, and is mainly used to realize the linear motion of the worktable or tool holder. The computer in the CNC device performs a series of processing on the information recorded in digital and character encoding through the input device, and then sends instructions to the machine tool spindle, feed and other actuators through the servo system and programmable controller. The main body of the machine tool completes the processing of the workpiece according to these instructions.

[0003] For example, the Chinese authorized patent "A CNC rapid positioning mechanism" with announcement number CN215590048U includes: a frame, a drive motor, two transmission wheels, a conveyor belt and multiple creasing and cutting components; the drive motor is arranged on the frame; two transmission wheels are rotatably arranged on the frame, one of which is connected to the output end of the drive motor; the conveyor belt is wound around the two transmission wheels; multiple creasing and cutting components are slidably arranged on the frame and movably connected to the conveyor belt. The CNC rapid positioning mechanism drives the conveyor belt to rotate through the drive motor, driving the multiple creasing and cutting components connected to the conveyor belt to quickly move to the predetermined position, realizing the position adjustment of the creasing and cutting components, and is compatible with creasing and cutting of cardboards of various specifications and sizes.

[0004] Although the above-mentioned existing technology can realize the driven positioning of the workpiece, the structure of the clamping device and the displacement transmission device is not only too complicated, but also the overall positioning effect is poor. For workpieces with higher precision, it is difficult to meet the processing requirements. Therefore, it does not meet the existing needs. In this regard, we propose a high-precision CNC mechanism. Summary of the invention

[0005] The purpose of the utility model is to provide a high-precision numerical control mechanism to solve the problem that the numerical control mechanism proposed in the above background technology is not only too complicated in structure but also has poor overall positioning effect.

[0006] To achieve the above object, the utility model provides the following technical solution: a high-precision numerical control mechanism, comprising a base, a workbench is arranged at the middle position of the upper end surface of the base; and further comprising:

[0007] A clamping and positioning mechanism is arranged inside the workbench, and the clamping and positioning mechanism includes a driving seat, a rotating disk is installed above the driving seat, the rotating disk is located inside the workbench, and the rotating disk is rotatably connected to the driving seat, and a servo motor for driving the rotating disk is installed at the upper end of the driving seat;

[0008] The clamping slider is installed in a ring shape and equidistantly at the upper end of the workbench. Four clamping sliders are provided, and the clamping sliders are slidably matched with the guide slide grooves on the workbench. A connecting rod is installed between the bottom of the clamping slider and the bottom of the rotating disk. The connecting rod has an L-shaped structure, and the two ends of the connecting rod are respectively connected to the clamping slider and the rotating disk through a rotating shaft. A clamping block is integrally formed on the upper end surface of the clamping slider.

[0009] Preferably, a limiting cavity is provided at the upper end inside the base, the driving seat is located inside the limiting cavity, and the driving seat and the limiting cavity are slidingly limited, a stud is rotatably installed inside the limiting cavity, the upper end of the stud extends to the inner screw hole of the driving seat and cooperates with the thread thereof, and the other end of the stud is driven by a servo motor inside the base.

[0010] Preferably, a support frame is welded and fixed on the upper end surface of the base, a longitudinal displacement mechanism is fixedly provided on the upper end of the support frame, a first screw is rotatably installed inside the longitudinal displacement mechanism, a longitudinal displacement slider is installed outside the first screw, and the longitudinal displacement slider is threadedly connected to the first screw, a transverse displacement mechanism is provided between the two longitudinal displacement mechanisms, and one side of the longitudinal displacement slider is fixed to the transverse displacement mechanism.

[0011] Preferably, a transmission mechanism is provided at the rear end between the two longitudinal displacement mechanisms, and one end of the first screw extends into the interior of the transmission mechanism, a first bevel gear is fixedly installed at one end of the first screw located inside the transmission mechanism, a transmission rod is rotatably installed inside the transmission mechanism, second bevel gears are fixedly provided at both ends of the transmission rod, and the second bevel gear is meshingly connected with the first bevel gear, and a servo motor for driving the transmission rod to rotate is installed on the side of the transmission mechanism.

[0012] Preferably, a second screw is rotatably installed inside the lateral displacement mechanism, a lateral sliding block is installed outside the second screw, the inner screw hole of the lateral sliding block is threadedly connected to the second screw, and the front and rear end plates of the lateral sliding block extend to the outside of the lateral displacement mechanism, and a main shaft is installed at the lower end of the lateral sliding block.

[0013] Preferably, a fourth bevel gear is installed at one end of the second screw, a third bevel gear is meshingly installed above the fourth bevel gear, and a shaft at the upper end of the third bevel gear is driven by a servo motor on one side of the upper end surface of the lateral displacement mechanism.

[0014] Preferably, the clamping block has an arc-shaped structure.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model installs a clamping positioning mechanism on the workbench, utilizes the cooperation of the rotating disk and the connecting rod to realize the synchronous movement of the clamping slider, thereby realizing center positioning. A servo motor is installed inside the driving seat, and its output shaft can drive the rotating disk to rotate. During the rotation process, the rotating disk will pull the connecting rod to move, thereby traction is formed on the clamping slider through its other end. At the same time, since the side of the clamping slider is limited by the guide groove of the workbench, the clamping slider moves horizontally in the guide groove of the workbench. Then the rotating disk rotates clockwise, and the clamping slider drives the clamping block to expand, thereby realizing the loosening of the workpiece. When the rotating disk rotates counterclockwise, the clamping slider drives the clamping block to contract, thereby realizing the center clamping positioning of the workpiece. The clamping positioning mechanism utilizes the cooperation of multiple connecting rods to realize the synchronous movement of the clamping block with a simple structure, which not only improves the positioning accuracy, but also is more convenient and easy to operate, and has a low maintenance cost.

[0017] 2. The utility model is provided with a longitudinal displacement mechanism and a transverse displacement mechanism. By turning on the servo motor on one side of the transmission mechanism, the transmission rod equipped with the second bevel gear is driven to rotate, meshing with the first bevel gear, and driving the two first screws to rotate synchronously. Under the friction between the screw hole in the longitudinal sliding block and the outer thread of the first screw, the rotational motion is converted into linear motion, so that the transverse displacement mechanism equipped with the main shaft is driven to move forward and backward through the longitudinal sliding block. By turning on the servo motor on the upper end side of the transverse displacement mechanism, the third bevel gear is driven to rotate, and the second screw equipped with the fourth bevel gear is driven to rotate in meshing cooperation. Similarly, the transverse sliding block is driven to drive the main shaft to perform transverse displacement, so that the main shaft can realize processing of the workpiece in multiple directions, and the flexibility is further improved.

[0018] 2. The workbench of the utility model adopts a lifting structure. By turning on the servo motor at one end of the stud, it can form a rotational motion. The friction between the external thread and the inner screw hole of the driving seat cooperates with the guiding effect of the limit cavity on the driving seat, so that the workbench is driven to move up and down through the driving seat. Under the CNC system, it can cooperate with the longitudinal displacement mechanism and the lateral displacement mechanism, thereby improving the processing effect of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 It is a three-dimensional diagram of the clamping and positioning mechanism of the utility model when the clamping block is in a retracted state;

[0021] Figure 3 It is a three-dimensional diagram of the clamping and positioning mechanism of the utility model when the clamping block is in the unfolded state;

[0022] Figure 4 This is a schematic diagram of the lifting transmission structure of the workbench of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the longitudinal displacement mechanism and the transverse displacement mechanism of the utility model.

[0024] In the figure: 1. base; 2. support frame; 3. longitudinal displacement mechanism; 4. lateral displacement mechanism; 5. transmission mechanism; 6. transverse displacement slider; 7. spindle; 8. workbench; 9. clamping and positioning mechanism; 10. rotating disk; 11. connecting rod; 12. clamping slider; 13. clamping block; 14. driving seat; 15. limiting cavity; 17. stud; 18. first screw; 19. longitudinal displacement slider; 20. first bevel gear; 21. transmission rod; 22. second bevel gear; 23. second screw; 24. third bevel gear; 25. fourth bevel gear. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] See also Figure 1-5 The utility model provides an embodiment: a high-precision numerical control mechanism, including a base 1, a workbench 8 is arranged at the middle position of the upper end surface of the base 1; and further comprising:

[0027] The clamping and positioning mechanism 9 is arranged inside the workbench 8. The clamping and positioning mechanism 9 includes a driving seat 14. A rotating disk 10 is installed above the driving seat 14. The rotating disk 10 is located inside the workbench 8, and the rotating disk 10 is rotatably connected to the driving seat 14. A servo motor for driving the rotating disk 10 is installed at the upper end of the driving seat 14.

[0028] The clamping slider 12 is installed in a ring shape and equidistantly at the upper end of the workbench 8. Four clamping sliders 12 are provided, and the clamping slider 12 slides in sliding cooperation with the guide groove on the workbench 8. A connecting rod 11 is installed between the bottom of the clamping slider 12 and the bottom of the rotating disk 10. The connecting rod 11 is an L-shaped structure, and the two ends of the connecting rod 11 are respectively connected to the clamping slider 12 and the rotating disk 10 through a rotating shaft. The upper end surface of the clamping slider 12 is integrally formed with a clamping block 13.

[0029] When in use, a servo motor is installed inside the driving seat 14, and its output shaft can drive the rotating disk 10 to rotate. During the rotation, the rotating disk 10 will pull the connecting rod 11 to move, thereby traction on the clamping slider 12 through its other end. At the same time, since the side of the clamping slider 12 is limited by the guide groove of the workbench 8, the clamping slider 12 moves horizontally in the guide groove of the workbench 8. Then the rotating disk 10 rotates clockwise, and the clamping slider 12 drives the clamping block 13 to expand, thereby releasing the workpiece. When the rotating disk 10 rotates counterclockwise, the clamping slider 12 drives the clamping block 13 to contract, thereby achieving the centered clamping positioning of the workpiece.

[0030] See also Figure 4 A limiting cavity 15 is provided at the upper end inside the base 1, the driving seat 14 is located inside the limiting cavity 15, and the driving seat 14 and the limiting cavity 15 are slidably limited, and a stud 17 is rotatably installed inside the limiting cavity 15, and the upper end of the stud 17 extends to the inner screw hole of the driving seat 14 and cooperates with its thread, and the other end of the stud 17 is driven by a servo motor inside the base 1. The clamping positioning mechanism 9 utilizes multi-link cooperation to achieve synchronous movement of the clamping block 13 with a simple structure, which not only improves the positioning accuracy, but also is more convenient and easy to operate, and has a lower maintenance cost.

[0031] See also Figure 1 and Figure 5 A support frame 2 is welded and fixed on the upper end surface of the base 1, and a longitudinal displacement mechanism 3 is fixedly arranged on the upper end of the support frame 2. A first screw 18 is rotatably installed inside the longitudinal displacement mechanism 3, and a longitudinal sliding block 19 is installed outside the first screw 18, and the longitudinal sliding block 19 is threadedly connected to the first screw 18. A transverse displacement mechanism 4 is arranged between the two longitudinal displacement mechanisms 3, and one side of the longitudinal sliding block 19 is fixed to the transverse displacement mechanism 4. A transmission mechanism 5 is arranged at the rear end between the two longitudinal displacement mechanisms 3, and one end of the first screw 18 extends to the inside of the transmission mechanism 5, and a first bevel gear 20 is fixedly installed on one end of the first screw 18 located inside the transmission mechanism 5. A transmission rod 21 is rotatably installed inside the transmission mechanism 5, and second bevel gears 22 are fixedly arranged at both ends of the transmission rod 21, and the second bevel gear 22 is meshed with the first bevel gear 20. A servo motor for driving the transmission rod 21 to rotate is installed on the side of the transmission mechanism 5, and the transverse displacement mechanism 4 equipped with the main shaft 7 is driven to move forward and backward through the longitudinal sliding block 19.

[0032] See also Figure 1 and Figure 5A second screw rod 23 is rotatably installed inside the lateral displacement mechanism 4, and a lateral sliding block 6 is installed outside the second screw rod 23. The inner screw hole of the lateral sliding block 6 is threadedly connected to the second screw rod 23, and the front and rear end plates of the lateral sliding block 6 extend to the outside of the lateral displacement mechanism 4. A main shaft 7 is installed at the lower end of the lateral sliding block 6, and a fourth bevel gear 25 is installed at one end of the second screw rod 23. A third bevel gear 24 is meshingly installed above the fourth bevel gear 25, and the shaft at the upper end of the third bevel gear 24 is driven by a servo motor on one side of the upper end surface of the lateral displacement mechanism 4. The main shaft 7 is driven by the lateral sliding block 6 to perform lateral displacement, so that the main shaft 7 can realize processing of the workpiece in multiple directions, and the flexibility is further improved.

[0033] Working principle: When in use, by turning on the servo motor on one side of the transmission mechanism 5, the transmission rod 21 equipped with the second bevel gear 22 is driven to rotate, meshing with the first bevel gear 20, driving the two first screws 18 to rotate synchronously, and under the friction between the inner screw hole of the longitudinal sliding block 19 and the outer thread of the first screw 18, the rotational motion is converted into linear motion, so that the lateral displacement mechanism 4 equipped with the main shaft 7 is driven to move forward and backward through the longitudinal sliding block 19, and the servo motor on the upper side of the lateral displacement mechanism 4 is turned on to drive the third bevel gear 24 to rotate, meshing with the first bevel gear 20. The second screw 23 equipped with the fourth bevel gear 25 is driven to rotate in cooperation, and the transverse sliding block 6 is driven to drive the main shaft 7 to move laterally, so that the main shaft 7 can realize the processing of the workpiece in multiple directions. By turning on the servo motor at one end of the stud 17, it can form a rotational motion. The friction between its external thread and the inner screw hole of the drive seat 14 cooperates with the guiding effect of the limit cavity 15 on the drive seat 14, thereby driving the workbench 8 to move up and down through the drive seat 14, and can cooperate with the longitudinal displacement mechanism 3 and the transverse displacement mechanism 4 under the numerical control system.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A high-precision numerical control mechanism, comprising a base (1), wherein a workbench (8) is arranged at a middle position of an upper end surface of the base (1); Features: Also includes: a clamping and positioning mechanism (9) arranged inside the workbench (8), the clamping and positioning mechanism (9) comprising a driving seat (14), a rotating disk (10) being installed above the driving seat (14), the rotating disk (10) being located inside the workbench (8), and the rotating disk (10) being rotatably connected to the driving seat (14), and a servo motor for driving the rotating disk (10) being installed at the upper end inside the driving seat (14); A clamping slider (12) is installed in a circular shape and equidistantly on the upper end of the workbench (8). Four clamping sliders (12) are provided, and the clamping sliders (12) are slidably matched with the guide grooves on the workbench (8). A connecting rod (11) is installed between the bottom of the clamping slider (12) and the bottom of the rotating disk (10). The connecting rod (11) is an L-shaped structure, and the two ends of the connecting rod (11) are respectively connected to the clamping slider (12) and the rotating disk (10) through a rotating shaft. The upper end surface of the clamping slider (12) is integrally formed with a clamping block (13).

2. A high-precision numerical control mechanism according to claim 1, characterized in that: A limiting cavity (15) is provided at the upper end of the interior of the base (1), the driving seat (14) is located inside the limiting cavity (15), and the driving seat (14) and the limiting cavity (15) are slidably limited, a stud (17) is rotatably installed inside the limiting cavity (15), the upper end of the stud (17) extends into the internal screw hole of the driving seat (14) and is threadably engaged therewith, and the other end of the stud (17) is driven by a servo motor inside the base (1).

3. A high-precision numerical control mechanism according to claim 1, characterized in that: A support frame (2) is fixedly welded to the upper end surface of the base (1); a longitudinal displacement mechanism (3) is fixedly arranged at the upper end of the support frame (2); a first screw rod (18) is rotatably mounted inside the longitudinal displacement mechanism (3); a longitudinal displacement slider (19) is mounted outside the first screw rod (18), and the longitudinal displacement slider (19) is threadedly connected to the first screw rod (18); a transverse displacement mechanism (4) is arranged between the two longitudinal displacement mechanisms (3), and one side of the longitudinal displacement slider (19) is fixed to the transverse displacement mechanism (4).

4. A high-precision numerical control mechanism according to claim 3, characterized in that: A transmission mechanism (5) is provided at the rear end between the two longitudinal displacement mechanisms (3), and one end of the first screw rod (18) extends into the interior of the transmission mechanism (5); a first bevel gear (20) is fixedly mounted on one end of the first screw rod (18) located inside the transmission mechanism (5); a transmission rod (21) is rotatably mounted inside the transmission mechanism (5); second bevel gears (22) are fixedly mounted at both ends of the transmission rod (21), and the second bevel gear (22) is meshingly connected with the first bevel gear (20); and a servo motor for driving the transmission rod (21) to rotate is installed on the side of the transmission mechanism (5).

5. A high-precision numerical control mechanism according to claim 3, characterized in that: A second screw rod (23) is rotatably mounted inside the transverse displacement mechanism (4), a transverse sliding block (6) is mounted outside the second screw rod (23), an inner screw hole of the transverse sliding block (6) is threadedly connected to the second screw rod (23), and front and rear end plates of the transverse sliding block (6) extend to the outside of the transverse displacement mechanism (4), and a main shaft (7) is mounted at the lower end of the transverse sliding block (6).

6. A high-precision numerical control mechanism according to claim 5, characterized in that: A fourth bevel gear (25) is mounted on one end of the second screw rod (23), a third bevel gear (24) is meshingly mounted above the fourth bevel gear (25), and a shaft at the upper end of the third bevel gear (24) is driven by a servo motor on one side of the upper end surface of the lateral displacement mechanism (4).

7. A high-precision numerical control mechanism according to claim 1, characterized in that: The clamping block (13) has an arc-shaped structure.

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