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CN-224209477-U - Clamping device and machine tool

CN224209477UCN 224209477 UCN224209477 UCN 224209477UCN-224209477-U

Abstract

The utility model relates to the technical field of workpiece clamping, and provides a clamping device and a machine tool. The driving motor is provided with a motor output shaft, a first end of the electric pull rod input shaft is in rigid direct connection with the motor output shaft, a first end of the screw rod is directly connected with a second end of the electric pull rod input shaft, the screw rod nut is in threaded transmission connection with the second end of the screw rod, and the pull rod is connected to the screw rod nut. According to the clamping device, the electric pull rod input shaft is in rigid direct connection with the motor output shaft, the screw rod is directly connected with the electric pull rod input shaft, the driving force of the driving motor can be transmitted to the screw rod without a speed reducer, the speed reducer can be prevented from amplifying the driving force, the clamping force of the clamping device is further reduced, the application range of the device is wider, workpieces with small bearing force such as thin walls or elasticity can be clamped, and the workpieces such as the thin walls or the elasticity cannot be damaged.

Inventors

  • LUO LE

Assignees

  • 广东络乐智慧科技有限公司

Dates

Publication Date
20260508
Application Date
20250417

Claims (10)

  1. 1. A clamping device, the clamping device locates the lathe main shaft, the lathe main shaft is equipped with the pull rod, its characterized in that, clamping device includes: The driving motor is provided with a motor output shaft; The first end of the electric pull rod input shaft is in rigid direct connection with the motor output shaft; The first end of the screw rod is directly connected with the second end of the electric pull rod input shaft; And the screw rod nut is in threaded transmission connection with the second end of the screw rod, and the pull rod is connected to the screw rod nut.
  2. 2. The clamping device as claimed in claim 1, wherein the clamping device is provided with a main housing, the main housing is provided with a containing space, the electric pull rod input shaft is rotatably arranged in the containing space along a central shaft thereof, The clamping device further comprises a rigid coupler, and the first end of the electric pull rod input shaft is directly connected with the motor output shaft through the rigid coupler.
  3. 3. The clamping device of claim 2, further comprising a connecting key, wherein the first end of the lead screw is directly coupled to the second end of the electric drawbar input shaft via the connecting key.
  4. 4. Clamping device according to claim 1, characterized in that the screw and the screw nut are in threaded driving engagement with a lead of 5mm, 8mm or 10mm.
  5. 5. The clamping device as recited in claim 2, further comprising an electromagnetic clutch disposed in the receiving space and configured to mate with the input shaft of the power operated draw bar.
  6. 6. The clamping device of claim 1, further comprising an encoder disposed on the drive motor and adapted to monitor the number of rotations and torque of the drive motor.
  7. 7. The clamping device as claimed in claim 2, characterized in that the clamping device is further provided with a carrier bearing, the carrier bearing being provided in the receiving space, the spindle being connected to the carrier bearing.
  8. 8. The clamping device of claim 7 wherein said load bearing is a bi-directional thrust ball bearing.
  9. 9. A machine tool comprising the clamping device according to any one of claims 1 to 8 and a machine tool body, The clamping device is arranged on the machine tool body.
  10. 10. The machine tool of claim 9, further comprising a drawbar and a spindle, The pull rod penetrates through the machine tool spindle, and the clamping device is connected with the pull rod.

Description

Clamping device and machine tool Technical Field The utility model relates to the technical field of workpiece clamping, in particular to a clamping device and a machine tool. Background When a workpiece is machined, it is often necessary to clamp the workpiece. Generally, a workpiece is fixed on a machine tool by a chuck and is driven by a motor to rotate at a high speed, and a cutting tool is controlled to perform carving on the surface of the workpiece to realize cutting, so that machining is completed. The chuck is a mechanical device on a machine tool for clamping a workpiece, and the workpiece is clamped and positioned by radial movement of movable jaws distributed on the chuck body. The chuck generally comprises a chuck body, movable claws and a claw driving motor assembly. In a motor direct-connected servo clamping system, a driving motor is generally adopted to drive a screw rod to rotate through a speed reducer, so that a pull rod on a machine tool spindle can move along the axial direction of the pull rod, and the workpiece is clamped. However, in the related workpiece clamping technology, the clamping force of the clamping system is too large, the application range is limited, and workpieces with small bearing forces such as thin walls or elasticity are difficult to clamp. Disclosure of utility model Aiming at the defects in the prior art, the utility model provides a clamping device which is used for solving at least one technical defect in the prior art, so that the clamping force of the device is not excessive, the application range is wider, and workpieces with small bearing forces such as thin walls or elasticity can be clamped. A second aspect of the utility model provides a machine tool. In order to achieve the object of the present utility model, the present utility model provides a clamping device comprising: The driving motor is provided with a motor output shaft; The first end of the electric pull rod input shaft is in rigid direct connection with the motor output shaft; The first end of the screw rod is directly connected with the second end of the electric pull rod input shaft; And the screw rod nut is in threaded transmission connection with the second end of the screw rod, and the pull rod is connected to the screw rod nut. Preferably, the clamping device is provided with a main shell, the main shell is provided with a containing space, the electric pull rod input shaft is rotationally arranged in the containing space along the central shaft of the electric pull rod input shaft, The clamping device further comprises a rigid coupler, and the first end of the electric pull rod input shaft is directly connected with the motor output shaft through the rigid coupler. Preferably, the electric pull rod further comprises a connecting key, and the first end of the screw rod is directly connected with the second end of the electric pull rod input shaft through the connecting key. Preferably, the lead of the screw rod and the screw rod nut in threaded transmission connection is 5mm, 8mm or 10mm. Preferably, the electric power transmission device further comprises an electromagnetic clutch, wherein the electromagnetic clutch is arranged in the accommodating space and is matched with the electric pull rod input shaft. Preferably, the motor further comprises an encoder, wherein the encoder is arranged on the driving motor and is suitable for monitoring the rotation number and the torsion of the driving motor. Preferably, the clamping device is further provided with a bearing, the bearing is arranged in the accommodating space, and the screw rod is connected with the bearing. Preferably, the load bearing is a bidirectional thrust ball bearing. A second aspect of the present utility model provides a machine tool comprising a clamping device as described above and a machine tool body, The clamping device is arranged on the machine tool body. Preferably, the machine tool further comprises a draw bar and a machine tool spindle, The pull rod penetrates through the machine tool spindle, and the clamping device is connected with the pull rod. The clamping device has the beneficial effects that the first end of the electric pull rod input shaft is directly connected with the motor output shaft in a rigid way, and the first end of the screw rod is directly connected with the second end of the electric pull rod input shaft, so that the driving force (namely torque force) of the driving motor can be transmitted to the screw rod without arranging a speed reducer, the speed reducer can be prevented from amplifying the driving force, the clamping force of the clamping device is further reduced, the application range of the device is wider, workpieces with small bearing force such as thin walls or elasticity can be clamped, and the workpieces such as the thin walls or the elasticity cannot be damaged. The machine tool provided by the utility model has all advantages of the clamping device due to the fact that