Cylinder clamp capable of automatically centering

Abstract

The utility model relates to the technical field of clamps, in particular to a cylinder clamp capable of automatically centering, which comprises a clamp body, a first driving shaft, a second driving shaft, a third driving shaft and a fourth driving shaft are respectively mounted on the periphery of the clamp body, and the first driving shaft, the second driving shaft, the third driving shaft and the fourth driving shaft are identical in structure. The automatic centering function greatly shortens the time for the clamp to align to the circle center of a workpiece, improves the machining efficiency, does not need manual intervention, reduces the labor intensity of operators, ensures that the clamping jaw can be accurately aligned to the circle center of the workpiece due to the high-precision detection capability of the sensor, improves the machining precision, is suitable for workpieces of different sizes and shapes, and improves the production efficiency. The adaptability and the flexibility of the clamp are enhanced, the workpiece toppling risk caused by clamping jaw deflection is avoided through the automatic centering function, the safety in the machining process is improved, and possible operation errors and injuries caused by manual adjustment are reduced.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, specifically to a cylindrical clamping fixture that can automatically find its center. Background Technology

[0002] In existing cylindrical clamping fixtures, the grippers typically lack automatic centering functionality. This means that operators must spend a significant amount of time manually adjusting the gripper positions to find and align with the workpiece's center. This manual adjustment process is not only inefficient but also poses safety hazards. When the grippers attempt to clamp the workpiece without aligning it with the center, the workpiece may tip over due to uneven force, causing equipment damage or personal injury. Furthermore, the precision of visual adjustment is limited and cannot meet the demands of high-precision machining.

[0003] In summary, a cylindrical clamp that can automatically find its center needs to be proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a cylindrical clamp that can automatically find its center, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A cylindrical clamp capable of automatically finding its center includes a clamp body. A first drive shaft, a second drive shaft, a third drive shaft, and a fourth drive shaft are respectively installed around the clamp body. The first, second, third, and fourth drive shafts have the same structure. One end of each of the first, second, third, and fourth drive shafts is installed at the bottom of a support rod on the clamp body. A servo motor is provided at the mounting point of each of the support rods and the first, second, third, and fourth drive shafts.

[0007] Preferably, protective plates are installed on both sides of the first drive shaft, and both protective plates are installed on both sides of the first drive shaft by fixing plates, and upper protective plates are fixedly installed at the upper and lower ends of the two fixing plates.

[0008] Preferably, a fixing block is installed on the fixing plate and the upper guard plate at the end of the first drive shaft away from the support rod. A lead screw is rotatably connected to the fixing block. The other end of the lead screw is fixedly connected to the servo motor at the bottom of the support rod. A lead screw drive block is threaded onto the lead screw. A limit slider is fixedly installed on the top of the lead screw drive block. The limit slider is slidably connected to a limit rod. One end of the limit rod is fixed to the fixing block, and the other end of the limit rod is fixed to the fixture body.

[0009] Preferably, the lead screw drive blocks at the bottom of the first drive shaft, the second drive shaft, the third drive shaft and the fourth drive shaft are all fixedly equipped with gripper support rods, and a common gripper vertical plate is fixedly installed on the inner side of the bottom of each gripper support rod.

[0010] Preferably, the servo motor at the bottom of the support rod is fixed by a prefabricated mounting plate.

[0011] Preferably, photoelectric displacement sensors and pressure sensors are installed on the inner side of the gripper vertical plates.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: The automatic centering function of this utility model greatly shortens the time for the fixture to align with the center of the workpiece, improves processing efficiency, eliminates the need for manual intervention, reduces the labor intensity of operators, and ensures that the high-precision detection capability of the sensor ensures that the jaws can accurately align with the center of the workpiece, improving processing accuracy. It is suitable for workpieces of different sizes and shapes, enhancing the adaptability and flexibility of the fixture. The automatic centering function avoids the risk of workpiece tipping due to jaw misalignment, improves the safety of the processing process, and reduces possible operational errors and injuries caused by manual adjustment. The stability and reliability of the sensor ensure the accuracy and stability of the fixture during long-term use, reducing processing errors caused by external interference or equipment wear. Therefore, the cylindrical fixture with automatic centering proposed in this utility model solves the problems of inefficiency, unsafety, and inaccuracy in the centering process of existing fixtures. Through the automatic centering function, this fixture improves processing efficiency, accuracy, and safety, providing a more reliable and efficient solution for the processing of cylindrical workpieces. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a cylindrical clamp that can automatically find its center according to this utility model.

[0014] In the picture:

[0015] 1. Fixture body; 2. Drive shaft 1; 3. Drive shaft 2; 4. Drive shaft 3; 5. Drive shaft 4; 6. Gripper vertical plate; 7. Lead screw; 8. Prefabricated mounting plate; 9. Protective plate; 10. Fixing plate; 11. Support rod; 12. Servo motor; 13. Upper guard plate; 14. Limiting slider; 15. Limiting slide rod; 16. Lead screw drive block; 17. Fixing block; 18. Gripper support rod. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1 This utility model proposes a cylindrical clamp that can automatically find its center, including a clamp body 1. A first drive shaft 2, a second drive shaft 3, a third drive shaft 4, and a fourth drive shaft 5 are respectively installed around the clamp body 1. The first drive shaft 2, the second drive shaft 3, the third drive shaft 4, and the fourth drive shaft 5 have the same structure. One end of the first drive shaft 2, the second drive shaft 3, the third drive shaft 4, and the fourth drive shaft 5 is installed at the bottom of a support rod 11 on the clamp body 1. A servo motor 12 is provided at the mounting points of the support rod 11 and the first drive shaft 2, the second drive shaft 3, the third drive shaft 4, and the fourth drive shaft 5.

[0018] Through the above steps, drive shaft 2, drive shaft 3, drive shaft 4, and drive shaft 5 are mounted on the fixture body 1 via support rod 11. Each drive shaft is connected to a servo motor 12 at one end. The servo motor 12 drives the drive shaft to rotate, thereby opening and closing the gripper support rod 18 and the gripper vertical plate 6. By setting up four drive shafts and servo motors, the fixture body 1 can clamp workpieces simultaneously from four directions, improving the stability and accuracy of clamping. The high-precision control characteristics of the servo motor 12 allow for precise control of the opening and closing actions of the gripper support rod 18 and the gripper vertical plate 6, adapting to workpieces of different sizes and shapes.

[0019] It should also be noted that protective plates 9 are installed on both sides of the first drive shaft 2. Both protective plates 9 are installed on both sides of the first drive shaft 2 through fixing plates 10. Upper protective plates 13 are fixedly installed at both the upper and lower ends of the two fixing plates 10.

[0020] Through the above steps, the protective plate 9 is installed on both sides of the first drive shaft 2 via the fixing plate 10 to protect the drive shaft and gripper from external interference or damage during operation. The upper protective plate 13 is fixedly installed at the upper and lower ends of the fixing plate 10, further enhancing the protective effect. The setting of the protective plate 9 and the upper protective plate 13 effectively protects the safety of the drive shaft and gripper during operation, extends the service life of the fixture, improves the reliability and stability of the fixture, and reduces machining errors caused by external interference.

[0021] It should also be noted that a fixing block 17 is installed on the fixing plate 10 and the upper guard plate 13 at the end of the first drive shaft 2 away from the support rod 11. A lead screw 7 is rotatably connected to the fixing block 17. The other end of the lead screw 7 is fixedly connected to the servo motor 12 at the bottom of the support rod 11. A lead screw drive block 16 is threadedly connected to the lead screw 7. A limit slider 14 is fixedly installed on the top of the lead screw drive block 16. The limit slider 14 is slidably connected to a limit slide rod 15. One end of the limit slide rod 15 is fixed to the fixing block 17, and the other end of the limit slide rod 15 is fixed to the fixture body 1.

[0022] Through the above steps, the fixing block 17 is installed on the fixing plate 10 and the upper guard plate 13. The lead screw 7 is rotatably connected to the fixing block 17, and the other end is fixedly connected to the servo motor 12 at the bottom of the support rod 11. The lead screw drive block 16 is threadedly connected to the lead screw 7. When the servo motor 12 drives the lead screw 7 to rotate, the lead screw drive block 16 will move linearly along the lead screw 7. The limiting slider 14 is fixedly installed on the top of the lead screw drive block 16 and slidably connected to the limiting slide bar 15 to ensure the stability of the movement trajectory of the lead screw drive block 16. The lead screw 7 and the lead screw drive block 16 realize the conversion of the rotational motion of the servo motor 12 into linear motion, thereby driving the opening and closing of the gripper support rod 18 and the gripper vertical plate 6. The setting of the limiting slider 14 and the limiting slide bar 15 improves the stability and accuracy of the movement of the lead screw drive block 16 and further enhances the clamping effect of the gripper vertical plate 6.

[0023] It should also be noted that the lead screw drive blocks 16 at the bottom of the first drive shaft 2, the second drive shaft 3, the third drive shaft 4 and the fourth drive shaft 5 are all fixedly installed with gripper support rods 18, and a gripper vertical plate 6 is fixedly installed on the inner side of the bottom of each gripper support rod 18.

[0024] Through the above steps, the lead screw drive block 16 is fixedly equipped with a gripper support rod 18, and the gripper vertical plate 6 is fixedly installed on the inner side of the bottom of the gripper support rod 18. When the lead screw drive block 16 moves linearly, the gripper support rod 18 will drive the gripper vertical plate 6 to move synchronously, thereby realizing the opening and closing of the gripper. The setting of the gripper support rod 18 and the gripper vertical plate 6 makes the opening and closing action of the gripper more stable and reliable, and also improves the adaptability and flexibility of the fixture body 1, enabling it to clamp workpieces of different sizes and shapes.

[0025] It should also be noted that the servo motor 12 at the bottom of the support rod 11 is fixed by a prefabricated mounting plate 8, and photoelectric displacement sensors and pressure sensors are installed on the inner side of the gripper vertical plate 6.

[0026] Through the above steps, a photoelectric displacement sensor is installed on the inner side of the gripper vertical plate 6 to detect the relative displacement between the gripper and the workpiece. A pressure sensor is also installed on the inner side of the gripper vertical plate 6 to detect the contact pressure between the gripper and the workpiece. When the gripper begins to clamp the workpiece, the photoelectric displacement sensor and the pressure sensor simultaneously detect the relative displacement and contact pressure between the gripper and the workpiece. When the gripper and the workpiece are not aligned, and one or more grippers contact the workpiece first, the corresponding sensor outputs a signal. After receiving the sensor signal, the control system determines the direction and degree of the gripper's deviation based on the source and magnitude of the signal, thereby controlling the moving mechanism of the equipment to perform motion compensation until the center of the gripper coincides with the center of the workpiece. By combining the photoelectric displacement sensor and the pressure sensor, the simultaneous detection of the relative displacement and contact pressure between the gripper and the workpiece is achieved, improving the accuracy and reliability of the gripper centering. This allows the fixture to automatically adapt to workpieces of different sizes and shapes, improving the fixture's adaptability and flexibility. Through the automatic centering function, machining errors caused by gripper deviation are reduced, improving machining quality and efficiency. Detailed implementation method:

[0028] In practical application, all sensors are in an initial state of no force or displacement, with no signal output. When the gripper support rod 18 and gripper vertical plate 6 on the fixture body 1 begin to clamp the workpiece, if the gripper vertical plate 6 is not aligned with the center of the workpiece, one or more grippers will contact the workpiece first. The gripper vertical plate 6 that contacts first will be blocked by the workpiece and subjected to force. This force will be transmitted to the sensors on the gripper vertical plate 6. The pressure sensor will detect the change in pressure, or the displacement sensor will detect a small displacement. The sensor converts this signal into an electrical signal and transmits it to the control system. After receiving the sensor signal, the control system will determine the deviation of the gripper based on the source of the signal. In terms of direction, when the sensor in the positive X direction sends a signal, it indicates that the gripper is deviated in the positive X direction, and vice versa in the positive Y direction. Based on the judgment result, the control system controls the moving mechanism of the equipment to perform motion compensation in the opposite direction. When the gripper is deviated in the positive X direction, the moving mechanism will drive the fixture to move in the negative X direction until the sensor signal disappears, or it shifts in the positive Y direction or other directions, and makes corresponding adjustments. When all sensor signals disappear, it means that the gripper no longer has the force of deviation, that is, the center of the gripper coincides with the center of the workpiece, and the alignment is successful. Through such feedback and automatic adjustment mechanism, the fixture can automatically find and clamp the center position of the workpiece, improving the machining accuracy and efficiency.

[0029] 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. A cylindrical clamp capable of automatically finding its center, comprising a clamp body (1), characterized in that, The clamp body (1) is equipped with a first drive shaft (2), a second drive shaft (3), a third drive shaft (4), and a fourth drive shaft (5) on its four sides. The first drive shaft (2), the second drive shaft (3), the third drive shaft (4), and the fourth drive shaft (5) have the same structure. One end of the first drive shaft (2), the second drive shaft (3), the third drive shaft (4), and the fourth drive shaft (5) is installed at the bottom of the support rod (11) on the clamp body (1). A servo motor (12) is provided at the bottom of the support rod (11) and the mounting points of the first drive shaft (2), the second drive shaft (3), the third drive shaft (4), and the fourth drive shaft (5).

2. The cylindrical clamp capable of automatic centering according to claim 1, characterized in that: Protective plates (9) are installed on both sides of the first drive shaft (2). Both protective plates (9) are installed on both sides of the first drive shaft (2) through fixing plates (10). Upper protective plates (13) are fixedly installed at the upper and lower ends of the two fixing plates (10).

3. The cylindrical clamp capable of automatic centering according to claim 2, characterized in that: A fixing block (17) is installed on the fixing plate (10) and the upper guard plate (13) at the end of the first drive shaft (2) away from the support rod (11). A lead screw (7) is rotatably connected to the fixing block (17). The other end of the lead screw (7) is fixedly connected to the servo motor (12) at the bottom of the support rod (11). A lead screw drive block (16) is threadedly connected to the lead screw (7). A limit slider (14) is fixedly installed on the top of the lead screw drive block (16). The limit slider (14) is slidably connected to the limit slide rod (15). One end of the limit slide rod (15) is fixed to the fixing block (17), and the other end of the limit slide rod (15) is fixed to the fixture body (1).

4. A cylindrical clamp capable of automatic centering according to claim 3, characterized in that: The lead screw drive blocks (16) at the bottom of the first drive shaft (2), the second drive shaft (3), the third drive shaft (4) and the fourth drive shaft (5) are all fixedly equipped with gripper support rods (18), and a common gripper vertical plate (6) is fixedly installed on the inner side of the bottom of each gripper support rod (18).

5. A cylindrical clamp capable of automatic centering according to claim 4, characterized in that: The servo motor (12) at the bottom of the support rod (11) is fixed by a prefabricated mounting plate (8).

6. A cylindrical clamp capable of automatic centering according to claim 5, characterized in that: Photoelectric displacement sensors and pressure sensors are installed on the inner side of the gripper vertical plate (6).

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