Multi-station synchronous clamping device

Abstract

The invention relates to the field of clamping devices, and particularly discloses a multi-station synchronous clamping device which comprises a base, a lifting table is arranged on the base in the vertical direction in a lifting mode, and an objective table is arranged on the lifting table in the horizontal direction in a sliding mode. A plurality of chucks are arranged on the objective table, each chuck comprises a shell and a plurality of clamping jaws sliding in the radial direction of the shell, and a first driving shaft is rotationally arranged in the shell; the chuck further comprises a first driving assembly used for driving the multiple clamping jaws to slide synchronously along with rotation of the first driving shaft. A synchronous driving mechanism is arranged on the base and used for driving the first driving shafts of the multiple chucks to rotate synchronously. The multi-station synchronous clamping device is compact in structure, synchronous driving of the multiple chucks can be achieved, and therefore multi-station synchronous clamping is achieved, and the machining precision and the machining efficiency can be improved easily.

Description

Technical Field

[0001] The present application relates to the field of clamping devices, and in particular to a multi-station synchronous clamping device. Background Art

[0002] In multi-station machine tools and automated production lines, clamping devices are usually set up at multiple stations to achieve rapid clamping, positioning and processing of multiple workpieces, which helps to ensure processing accuracy and improve processing efficiency. When clamping multiple workpieces, it is necessary to improve the synchronization of multi-station clamping as much as possible to ensure that all workpieces are subjected to the same clamping force during processing and have the same positioning accuracy, thereby avoiding processing errors caused by unstable clamping or inaccurate positioning. Summary of the invention

[0003] In order to improve the synchronization of multi-station clamping, the present application provides a multi-station synchronous clamping device.

[0004] The present application provides a multi-station synchronous clamping device adopts the following technical solution: A multi-station synchronous clamping device, comprising: Base; A lifting platform is arranged on the base in a vertical manner; A loading platform is slidably arranged on the lifting platform in a horizontal direction; A plurality of chucks are arranged on the stage; the chucks include a housing and a plurality of claws that slide radially along the housing, a first drive shaft is rotatably arranged in the housing; the chucks also include a first drive assembly for driving the plurality of claws to slide synchronously with the rotation of the first drive shaft; The synchronous driving mechanism is used to drive the first driving shafts of the plurality of chucks to rotate synchronously.

[0005] When the first drive shaft rotates, the first drive assembly drives multiple claws on the chuck to slide synchronously; when multiple claws approach the center of the chuck at the same time, the workpiece is clamped; when multiple claws move away from the center of the chuck at the same time, the workpiece is released. The first drive shafts of multiple chucks are driven to rotate synchronously through the synchronous drive mechanism, thereby realizing synchronous driving of the claws on multiple chucks, and then realizing multi-station synchronous clamping.

[0006] The position of the chuck can be adjusted by lifting the lifting platform in the vertical direction and sliding the loading platform in the horizontal direction to meet different processing requirements.

[0007] Furthermore, the first driving assembly includes a driving disk rotatably disposed in the housing, the driving disk being coaxially fixed to the first driving shaft; a spiral groove is provided on the upper end surface of the driving disk, and a tooth portion meshing with the spiral groove is provided on the lower end surface of the claw.

[0008] When the first driving shaft rotates, the driving disc rotates, the spiral groove cooperates with the claw teeth, and the multiple claws on the driving chuck are synchronously moved closer to or away from the center of the chuck.

[0009] Furthermore, the synchronous drive mechanism includes a telescopic rod and a first universal joint and a second universal joint respectively connected to both ends of the telescopic rod, the two ends of the first universal joint are respectively fixed to the telescopic rod and the first drive shaft; one end of the second universal joint is fixed to the telescopic rod, and the other end of the second universal joint is fixed to the second drive shaft; a synchronous drive component for driving multiple second drive shafts to rotate synchronously is provided on the base.

[0010] The multiple second drive shafts are driven to rotate synchronously through the synchronous drive assembly, and the first drive shaft is driven to rotate under the transmission of the corresponding second universal joint, the telescopic rod and the first universal joint.

[0011] The present application sets the chuck on the stage and sets the synchronous drive mechanism on the base, which is conducive to improving the compactness of the device as a whole. When the lifting platform is lifted in the vertical direction or the stage slides in the horizontal direction, the telescopic rod can be adaptively extended and retracted to adjust the position of the stage.

[0012] Furthermore, the synchronous drive assembly includes a first synchronous wheel coaxially fixed to the second drive shaft, and the first synchronous wheel is rotatably set on the base; the synchronous drive assembly also includes a first synchronous belt tensioned and wrapped around multiple first synchronous wheels and a first active synchronous wheel meshed with the first synchronous belt.

[0013] When the first active synchronous wheel rotates, under the drive of the first synchronous belt, the multiple first synchronous wheels rotate synchronously, realizing the synchronous driving of the multiple first driving shafts, and further driving the claws on the multiple chucks to synchronously approach or synchronously move away from the center of the chuck.

[0014] Furthermore, the synchronous drive assembly also includes a plurality of guide synchronous wheels corresponding one-to-one to the plurality of first synchronous wheels, and the first synchronous belt is arranged in a circuitous manner between the plurality of first synchronous wheels and the plurality of guide synchronous wheels.

[0015] The plurality of guide synchronous wheels bend the first synchronous belt, which helps to increase the meshing area of ​​the first synchronous belt on the first synchronous wheel, thereby improving the transmission efficiency.

[0016] Furthermore, the plurality of first synchronous wheels are all meshed with the inner side of the first synchronous belt, and the plurality of guide synchronous wheels are all meshed with the outer side of the first synchronous belt.

[0017] Multiple first synchronous wheels are all meshed on the same side of the first synchronous belt, so that the rotation directions of the multiple first synchronous wheels are the same, thereby driving the multiple first drive shafts to rotate in the same direction, and then driving the claws on the multiple chucks to synchronously approach or move away from the center of the chuck, and the claws on the multiple chucks move at the same speed, ensuring the synchronization of clamping.

[0018] Furthermore, displacement optical axes are fixedly arranged on both sides of the lifting platform, optical axis sliders are slidably arranged on the displacement optical axes on both sides of the lifting platform, and the loading platform is fixedly connected between the two optical axis sliders.

[0019] Furthermore, a support frame is fixedly provided on the base, and a vertical guide rail is fixedly provided on the support frame for the sliding movement of the lifting platform. A lead screw lifting mechanism for driving the lifting platform to move up and down is also provided on the base.

[0020] Furthermore, a mounting seat is slidably arranged on the stage, and the chuck is fixedly arranged on the mounting seat; and a sliding track of the mounting seat is orthogonal to a sliding track of the stage.

[0021] Furthermore, the loading platform is provided with a long hole for the first driving shaft to pass through.

[0022] The mounting seat can slide in the horizontal direction, and with the lifting platform lifting in the vertical direction and the stage sliding in the horizontal direction, the chuck position can be flexibly adjusted to meet different processing requirements.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application can realize synchronous driving of multiple chucks, thereby realizing synchronous clamping of multiple stations, which is beneficial to improving processing accuracy and processing efficiency; 2. The mounting base slides horizontally, the lifting platform lifts vertically, and the loading platform slides horizontally, so as to adjust the position of the chuck to meet different processing requirements. During the adjustment of the chuck position, the telescopic rod can be adaptively extended and retracted. 3. By setting the first synchronous wheel, the first synchronous belt, the telescopic rod, the first universal joint and the second universal joint, the present application can realize the synchronous driving of multiple chucks through one motor. At the same time, the chuck and the synchronous drive mechanism are separated in space from top to bottom, which is beneficial to improving the overall compactness of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a partial structural schematic diagram of the embodiment of the present application mainly used to show the stage, the chuck and the synchronous drive mechanism; Figure 3 It is a schematic diagram of the exploded structure of the chuck in the embodiment of the present application; Figure 4 is a schematic cross-sectional structural diagram of a chuck in an embodiment of the present application; Figure 5 is a schematic structural diagram of a telescopic rod in an embodiment of the present application; Figure 6 is a partial schematic diagram of a synchronous drive assembly in an embodiment of the present application; Figure 7 It is a partial schematic diagram of the lead screw lifting mechanism in the embodiment of the present application; Figure 8 It is a partial schematic diagram mainly used to show the support frame and the lifting platform in the embodiment of the present application; Fig. 9 is a schematic diagram of the structure of the stage in the embodiment of the present application; Fig.10 It is a schematic diagram of the structure of the stage from another angle in the embodiment of the present application.

[0025] Reference numerals: 1. Base; 11. Support frame; 111. Guide rail; 12. Lead screw; 121. Second synchronous wheel; 122. Second synchronous belt; 123. Second active synchronous wheel; 124. Second motor; 2. Lifting platform; 21. Displacement optical axis; 22. Optical axis slider; 23. Fixed plate; 3. stage; 31. mounting seat; 311. limit groove; 32. long hole; 33. displacement adjustment screw; 331. convex ring; 4. chuck; 41. housing; 42. claw; 421. tooth portion; 43. first drive shaft; 44. drive plate; 441. spiral groove; 442. bevel gear ring; 45. bevel gear; 451. limiting ring groove; 46. limiting pin; 5. Synchronous drive mechanism; 51. Telescopic rod; 511. Telescopic inner rod; 512. Telescopic sleeve; 52. First universal joint; 53. Second universal joint; 54. Second drive shaft; 55. Synchronous drive assembly; 551. First synchronous wheel; 552. First synchronous belt; 553. First active synchronous wheel; 554. Guide synchronous wheel; 555. First motor; 56. Mounting plate. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-10 This application is described in further detail.

[0027] The present application discloses a multi-station synchronous clamping device. Figure 1 and Figure 2The multi-station synchronous clamping device comprises a base 1, a lifting platform 2 is provided on the base 1 for vertical lifting, and a loading platform 3 is provided on the lifting platform 2 for horizontal sliding. In this embodiment, two loading platforms 3 are provided, and two chucks 4 are provided on each loading platform 3.

[0028] Reference Figure 2 and Figure 3 The chuck 4 includes a cylindrical housing 41 and three claws 42 that slide radially along the housing 41. The three claws 42 are spaced apart in sequence along the circumference of the housing 41. A first drive shaft 43 is rotatably disposed in the housing 41. The chuck 4 also includes a first drive assembly for driving the plurality of claws 42 to slide synchronously with the rotation of the first drive shaft 43. Figure 1 A synchronous driving mechanism 5 is provided on the base 1 for driving the first driving shafts 43 of the plurality of chucks 4 to rotate synchronously.

[0029] When the first drive shaft 43 rotates, the first drive assembly drives the multiple claws 42 on the chuck 4 to slide synchronously; when the multiple claws 42 simultaneously approach the center of the chuck 4, the workpiece is clamped; when the multiple claws 42 simultaneously move away from the center of the chuck 4, the workpiece is released. The first drive shafts 43 of the multiple chucks 4 are driven to rotate synchronously by the synchronous drive mechanism 5, thereby realizing synchronous driving of the claws 42 on the multiple chucks 4, and then realizing multi-station synchronous clamping.

[0030] The three-jaw chuck in this embodiment can be replaced by a four-jaw chuck or a six-jaw chuck, and each chuck 4 can independently clamp a small columnar or rod-shaped workpiece, and multiple chucks 4 can realize synchronous clamping of multiple workpieces, which is convenient for grinding, brush plating, etc. of multiple workpieces at the same time. In addition, each chuck 4 can also be used to clamp a secondary fixture, and then use multiple secondary fixtures to clamp a large workpiece.

[0031] Reference Figure 3 and Figure 4 The first driving assembly includes a driving disc 44 rotatably disposed in the housing 41, and the driving disc 44 is coaxially fixed to the first driving shaft 43; a spiral groove 441 is provided on the upper end surface of the driving disc 44, and a tooth portion 421 meshing with the spiral groove 441 is provided on the lower end surface of the claw 42. A bevel gear ring 442 is coaxially disposed on the lower end surface of the driving disc 44, and three bevel gears 45 meshing with the bevel gear ring 442 are rotatably disposed on the side wall of the housing 41; specifically, a circular hole for accommodating the bevel gear 45 is provided on the housing 41, and a limiting pin 46 is fixedly disposed inside the circular hole, and a limiting ring groove 451 for accommodating the limiting pin 46 is provided at one end of the bevel gear 45.

[0032] When the first driving shaft 43 rotates, the driving disk 44 rotates, and the spiral groove 441 cooperates with the tooth portion 421 of the claw 42 to drive the multiple claws 42 on the chuck 4 to synchronously approach or synchronously move away from the center of the chuck 4 .

[0033] In order to realize the synchronous driving of multiple chucks 4, refer to Figure 2 and Figure 3 The synchronous drive mechanism 5 includes a telescopic rod 51 corresponding to the chuck 4 and a first universal joint 52 and a second universal joint 53 respectively connected to both ends of the telescopic rod 51; wherein, one end of the first universal joint 52 is fixedly connected to the upper end of the telescopic rod 51, and the other end of the first universal joint 52 is fixedly connected to the first driving shaft 43.

[0034] Reference Figure 5 The telescopic rod 51 includes a telescopic inner rod 511 and a telescopic sleeve 512 that are slidably connected. In order to prevent the telescopic inner rod 511 and the telescopic sleeve 512 from rotating relative to each other during the telescopic rod 51 extension and retraction process, a protrusion is fixedly provided on the outer peripheral wall of the telescopic inner rod 511, and a guide long groove for the protrusion to slide is opened on the side wall of the telescopic sleeve 512.

[0035] In order to drive the multiple telescopic rods 51 to rotate synchronously, refer to Figure 2 and Figure 6 A mounting plate 56 is fixedly provided on the base 1, and a second drive shaft 54 ​​is rotatably connected to the mounting plate 56 through a bearing. One end of the second universal joint 53 is fixedly connected to the lower end of the telescopic rod 51, and the other end of the second universal joint 53 is fixedly connected to the second drive shaft 54. A synchronous drive assembly 55 for driving multiple second drive shafts 54 to rotate synchronously is also provided on the base 1.

[0036] Specifically, refer to Figure 6 The synchronous drive assembly 55 includes a first synchronous wheel 551 coaxially fixed to the second drive shaft 54, and the four first synchronous wheels 551 are commonly tensioned and covered with a first synchronous belt 552. A first active synchronous wheel 553 is also rotatably arranged on the base 1, and the first active synchronous wheel 553 is engaged with the first synchronous belt 552. A first motor 555 is installed on the base 1, and the output end of the first motor 555 is connected to the first active synchronous wheel 553 through a synchronous belt assembly, which is used to drive the first active synchronous wheel 553 to rotate.

[0037] Further, refer to Figure 6 The synchronous drive assembly 55 further includes four guide synchronous wheels 554 corresponding to the four first synchronous wheels 551, and the first synchronous belt 552 is alternately arranged between the plurality of first synchronous wheels 551 and the plurality of guide synchronous wheels 554. The plurality of guide synchronous wheels 554 bend the first synchronous belt 552, which helps to increase the meshing area of ​​the first synchronous belt 552 on the first synchronous wheel 551, thereby improving the transmission efficiency.

[0038] Reference Figure 6The multiple first synchronous wheels 551 are all meshed with the inner side of the first synchronous belt 552 , so that the rotation directions of the multiple first synchronous wheels 551 are the same; the multiple guide synchronous wheels 554 are all meshed with the outer side of the first synchronous belt 552 .

[0039] When the first motor 555 drives the first active synchronous wheel 553 to rotate, under the transmission of the first synchronous belt 552, multiple first synchronous wheels 551 rotate synchronously, driving multiple second drive shafts 54 to rotate synchronously; under the transmission of the corresponding second universal joint 53, telescopic rod 51 and first universal joint 52, the corresponding first drive shaft 43 is driven to rotate. The directions and speeds of rotation of multiple first drive shafts 43 are consistent, so that the moving speeds and moving distances of the claws 42 on multiple chucks 4 are consistent, ensuring the synchronization of clamping; when the initial positions of the claws 42 of multiple chucks 4 are the same, the clamping forces of multiple chucks 4 can be guaranteed to be consistent. The present application can realize the synchronous driving of multiple chucks 4 by one motor, and at the same time, realize the upper and lower separation of the chuck 4 and the synchronous drive mechanism in space, which is conducive to improving the overall compactness of the device.

[0040] In order to adjust the position of the chuck 4 according to the processing requirements, first adjust the height of the stage 3, referring to Figure 1 and Figure 7 Support frames 11 are fixedly provided at both ends of the base 1, vertical guide rails 111 are fixedly provided on both sides of each support frame 11, and sliders adapted to slide with the guide rails 111 are fixedly provided on the side of the lifting platform 2.

[0041] Reference Figure 7 and Figure 8 The base 1 is also provided with a screw lifting mechanism for driving the lifting platform 2 to lift and lower. Specifically, a fixed plate 23 is fixedly provided on the lifting platform 2. The screw 12 lifting mechanism includes two screws 12 rotatably provided on the support frame 11. The screws 12 are vertically provided and threadedly penetrate the fixed plate 23. A second synchronous wheel 121 is coaxially fixedly connected to the lower end of each screw 12. The two second synchronous wheels 121 are jointly tensioned and covered with a second synchronous belt 122. The second synchronous belt 122 is also meshed with a second active synchronous wheel 123. A second motor 124 is also installed on the base 1. The output end of the second motor 124 is connected to the second active synchronous wheel 123 through a synchronous belt assembly, which is used to drive the second active synchronous wheel 123 to rotate.

[0042] When the second motor 124 drives the second active synchronous wheel 123 to rotate, the two second synchronous wheels 121 rotate synchronously under the transmission of the second synchronous belt 122, driving the two lead screws 12 to rotate synchronously, thereby driving the lifting platform 2 to rise and fall in the vertical direction.

[0043] Then, adjust the position of the stage 3 in the horizontal direction, referring to Figure 1 and Figure 8Two horizontal displacement optical axes 21 are fixedly arranged on both sides of the lifting platform 2, and optical axis sliders 22 are slidably arranged on the displacement optical axes 21 on both sides of the lifting platform 2, and each stage 3 is fixedly connected between two opposite optical axis sliders 22. When the optical axis sliders 22 slide along the displacement optical axes 21, the position of the stage 3 in the horizontal direction can be adjusted.

[0044] Further, in order to adjust the position of the chuck 4 on the stage 3, refer to Fig. 9 and Fig.10 A mounting seat 31 is slidably provided on the stage 3, a housing 41 of the chuck 4 is fixedly provided on the mounting seat 31, and a first drive shaft 43 is rotatably provided on the mounting seat 31 through a bearing. The sliding track of the mounting seat 31 is orthogonal to the sliding track of the stage 3, and a long hole 32 is provided on the stage 3 for the first drive shaft 43 to pass through. A displacement adjustment screw 33 is rotatably provided on the side of the stage 3, and the displacement adjustment screw 33 includes a screw rod threadedly connected to the stage 3, and a convex ring 331 is fixedly provided at one end of the screw rod, and a limiting groove 311 for accommodating the convex ring 331 is provided on one side of the bottom of the mounting seat 31.

[0045] By turning the displacement adjustment screw 33, the mounting seat 31 can be pushed to move. In this process, the first drive shaft 43 slides along the long hole 32, thereby adjusting the position of the chuck 4 on the stage 3. At the same time, the corresponding telescopic rod 51 can be adaptively extended and retracted to achieve independent adjustment of the position of each chuck 4. In addition, with the lifting platform 2 lifting in the vertical direction and the stage 3 sliding in the horizontal direction, the three-dimensional flexible adjustment of the position of the chuck 4 can be achieved to meet different processing requirements.

[0046] The implementation principle of a multi-station synchronous clamping device in the embodiment of the present application is as follows: the first active synchronous wheel 553 is driven to rotate by the first motor 555, and the corresponding first driving shaft 43 is driven to rotate under the transmission of the first synchronous belt 552, multiple first synchronous wheels 551 and the corresponding second driving shaft 54, the second universal joint 53, the telescopic rod 51 and the first universal joint 52. The directions and speeds of rotation of multiple first driving shafts 43 are consistent, so that the moving speeds and moving distances of the claws 42 on multiple chucks 4 are consistent, ensuring the synchronization of clamping; when the initial positions of the claws 42 on multiple chucks 4 are the same, the clamping forces of multiple chucks 4 can be guaranteed to be consistent. By adaptively extending and retracting the telescopic rod 51, the position of the chuck 4 can be flexibly adjusted according to processing requirements.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-station synchronous clamping device, characterized in that: include: Base; A lifting platform is arranged on the base in a vertical manner; A loading platform is slidably arranged on the lifting platform in a horizontal direction; A plurality of chucks are arranged on the stage; the chucks include a housing and a plurality of claws that slide radially along the housing, a first drive shaft is rotatably arranged in the housing; the chucks also include a first drive assembly for driving the plurality of claws to slide synchronously with the rotation of the first drive shaft; The synchronous driving mechanism is used to drive the first driving shafts of the plurality of chucks to rotate synchronously.

2. A multi-station synchronous clamping device according to claim 1, characterized in that: The first driving assembly includes a driving disk rotatably disposed in the housing, the driving disk being coaxially fixed to the first driving shaft; a spiral groove is formed on the upper end surface of the driving disk, and a tooth portion meshing with the spiral groove is formed on the lower end surface of the claw.

3. A multi-station synchronous clamping device according to claim 1, characterized in that: The synchronous drive mechanism includes a telescopic rod and a first universal joint and a second universal joint respectively connected to the two ends of the telescopic rod, the two ends of the first universal joint are respectively fixed to the telescopic rod and the first drive shaft; one end of the second universal joint is fixed to the telescopic rod, and the other end of the second universal joint is fixed to the second drive shaft; a synchronous drive component for driving multiple second drive shafts to rotate synchronously is provided on the base.

4. A multi-station synchronous clamping device according to claim 3, characterized in that: The synchronous drive assembly includes a first synchronous wheel coaxially fixed to the second drive shaft, and the first synchronous wheel is rotatably arranged on the base; the synchronous drive assembly also includes a first synchronous belt tensioned and wrapped around the first synchronous wheels and a first active synchronous wheel meshed with the first synchronous belt.

5. A multi-station synchronous clamping device according to claim 4, characterized in that: The synchronous drive assembly further includes a plurality of guide synchronous wheels corresponding one-to-one to the plurality of first synchronous wheels, and the first synchronous belt is arranged in a circuitous manner between the plurality of first synchronous wheels and the plurality of guide synchronous wheels.

6. A multi-station synchronous clamping device according to claim 5, characterized in that: The plurality of first synchronous wheels are all meshed with the inner side of the first synchronous belt, and the plurality of guide synchronous wheels are all meshed with the outer side of the first synchronous belt.

7. The multi-station synchronous clamping device according to claim 3, characterized in that: Displacement optical axes are fixedly arranged on both sides of the lifting platform, and optical axis sliders are slidably arranged on the displacement optical axes on both sides of the lifting platform, and the object carrier is fixedly connected between the two optical axis sliders.

8. The multi-station synchronous clamping device according to claim 1, characterized in that: A support frame is fixedly arranged on the base, and a vertical guide rail is fixedly arranged on the support frame for the lifting platform to slide. A lead screw lifting mechanism for driving the lifting platform to move up and down is also arranged on the base.

9. The multi-station synchronous clamping device according to claim 1, characterized in that: A mounting seat is slidably arranged on the stage, and the chuck is fixedly arranged on the mounting seat; the sliding track of the mounting seat is orthogonal to the sliding track of the stage.

10. The multi-station synchronous clamping device according to claim 9, characterized in that: The loading platform is provided with a long hole for the first driving shaft to pass through.

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