Cutter handle clamping mechanism of ultrasonic spindle

Abstract

The knife handle clamping mechanism comprises a shell and a knife handle, an ultrasonic transducer is arranged in the knife handle, a rotating shaft and a driving part are arranged in the shell, the rotating shaft is rotationally connected with the shell, and the driving part is used for driving the rotating shaft to rotate; a clamping unit is arranged in the rotating shaft, a containing cavity for containing the knife handle is formed in the tail end of the rotating shaft, and the clamping unit is used for clamping the knife handle to rotate synchronously with the rotating shaft; the clamping unit comprises an electromagnetic driving part, a movable part and an elastic chuck arranged on the rotating shaft, the elastic chuck can move in the radial direction to clamp or loosen the knife handle in the containing cavity, and the electromagnetic driving part is used for driving the movable part to move in the axis direction to limit movement of the elastic chuck; the clamping units are intensively arranged on the rotating shaft, the overall size is small, the movable part is controlled to move through electromagnetism, clamping or loosening of the cutter handle is achieved, the response speed is high, and the cutter handle replacement speed can be increased.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ultrasonic spindles, in particular to a tool holder clamping mechanism of an ultrasonic spindle. BACKGROUND

[0002] In mechanical processing, a tool needs to be accurately positioned and firmly fixed on a machine tool spindle to ensure the processing quality and processing effect. The spindle tool holder locking mechanism is a key component to achieve this goal. Its stability and reliability directly affect the machining accuracy, machining efficiency and service life of the tool.

[0003] The existing ultrasonic spindle is usually away from the installation of the cylinder assembly, and the claw is axially driven by the pull rod to move axially to extend or retract, and the pull pin on the tool holder is removed or clamped to clamp the tool holder. The overall volume is relatively large, and the claw needs to be pushed axially to extend to take out the tool holder, and the replacement speed is also relatively slow. CONTENT OF THE UTILITY MODEL

[0004] The application provides a tool holder clamping mechanism of an ultrasonic spindle to solve the above-mentioned problems of the prior art, and adopts the following technical scheme:

[0005] The tool holder clamping mechanism of the ultrasonic spindle comprises a shell and a tool holder, the tool holder is provided with an ultrasonic transducer, the shell is provided with a rotating shaft and a driving part, the rotating shaft is rotationally connected to the shell, and the driving part is used for driving the rotating shaft to rotate.

[0006] The rotating shaft is provided with a clamping unit, the end of the rotating shaft is provided with a cavity for placing the tool holder, and the clamping unit is used for clamping the tool holder and rotating synchronously with the rotating shaft.

[0007] The clamping unit comprises an electromagnetic driving part, a movable part and an elastic chuck provided on the rotating shaft, the elastic chuck can move radially to clamp or release the tool holder in the cavity, and the electromagnetic driving part is used for driving the movable part to move along the axis to limit the movement of the elastic chuck.

[0008] Preferably, the elastic chuck comprises an elastic sheet and a protruding part, one end of the elastic sheet is connected to the rotating shaft, and the protruding part is arranged on the movable end of the elastic sheet and used for locking the tool holder.

[0009] Preferably, the rotating shaft is circumferentially provided with a plurality of accommodating grooves, and the elastic chuck is arranged in the accommodating grooves.

[0010] Further preferably, the rotating shaft is provided with an annular groove around the accommodating groove, and the movable part is movably arranged in the annular groove.

[0011] Preferably, a limiting part is arranged on the movable part, which can keep the movable part rotating synchronously with the rotating shaft.

[0012] Preferably, a resetting part is arranged between the rotating shaft and the movable part, which is used to drive the movable part to move to cover the elastic chuck and limit the activity of the elastic chuck.

[0013] Further preferably, the accommodating groove comprises a first groove and a second groove, and the second groove is communicated with the first groove and the accommodating cavity.

[0014] Compared with the prior art, the application has the following beneficial effects:

[0015] The application is provided with an elastic chuck on the rotating shaft, which can move along the radial direction of the rotating shaft, so as to dismount and mount the tool handle. The movable part is moved along the axis direction of the rotating shaft by electromagnetic control, so as to lock the one end provided with the protruding part and clamp the tool handle. The whole clamping unit is arranged on the rotating shaft, which can reduce the overall volume and improve the replacement speed of the tool handle. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the application;

[0017] Figure 2 is a schematic diagram of the normal state structure of the application;

[0018] Figure 3 is a schematic diagram of the working state structure of the application;

[0019] Figure 4 is an enlarged view of A of the application.

[0020] In the drawings:

[0021] 1, rotating shaft, 2, tool handle, 3, clamping unit, 31, electromagnetic driving part, 32, elastic chuck, 321, elastic sheet, 322, protruding part, 33, movable part, 34, resetting part, 4, accommodating groove, 41, first groove, 42, second groove, 5, shell, 6, bearing, 7, annular groove, 8, driving part, 10, accommodating cavity. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings of the application. Obviously, the embodiments described in the application are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0023] ReferenceFigures 1 to 4 The application is further described in detail as follows:

[0024] The tool holder clamping mechanism of the ultrasonic spindle comprises a shell 5, a tool holder 2, a rotating shaft 1 and a driving part 8, the driving part 8 and the rotating shaft 1 are sequentially arranged in the shell 5, the tool holder 2 is inserted into the cavity 10 at the end of the rotating shaft 1, and the rotating shaft 1 is rotationally connected to the shell 5; wherein a plurality of bearings 6 are arranged between the rotating shaft 1 and the shell to support the rotating shaft 1, and the driving part 8 comprises a stator and a rotor; the driving part 8 is used to drive the rotating shaft 1 to rotate the tool holder 2; an ultrasonic transducer (not shown) is arranged in the tool holder 2, the ultrasonic transducer is composed of a plurality of piezoelectric sheets, and can convert electrical energy into mechanical vibration acting on the tool holder 2 to process a workpiece.

[0025] In combination Figure 1 The rotating shaft 1 is provided with a clamping unit 3, and the clamping unit 3 is used to clamp the tool holder 2 and the rotating shaft 1; wherein the clamping unit 3 comprises an electromagnetic driving part 31, a movable part 33, and a plurality of elastic clamps 32 arranged on the rotating shaft 1; in combination Figure 4 The elastic clamps 32 can move to clamp or release the tool holder 2 along the radial direction of the rotating shaft 1; in the embodiment, the electromagnetic driving part 31 comprises an iron core and a coil, and the movable part 33 can be an armature; the electromagnetic driving part 31 can be arranged in the shell 5 and arranged around the rotating shaft 1, and the overall volume is smaller; of course, it can also be arranged at other positions, and can drive the movable part 33 to move along the axis direction of the rotating shaft 1 to limit the radial movement of the elastic clamps 32.

[0026] Compared with the prior art, the application controls the movement of the movable part 33 by electromagnetism, thereby releasing the elastic clamps 32, so that the elastic clamps 32 are opened along the radial direction of the rotating shaft 1, the tool holder 2 is conveniently removed from the rotating shaft 1 for replacement, the tool holder 2 can be quickly released or clamped, the replacement efficiency of the tool holder 2 is improved, and the overall occupied volume is reduced.

[0027] In combination Figure 3 Wherein the elastic clamps 32 comprise elastic sheets 321 and protruding parts 322, the elastic sheets 321 themselves have elasticity and can be elastic metal sheets, but are not limited thereto; in the embodiment not shown, the surface of the protruding part 322 is provided with an anti-skid structure, which can be anti-skid lines.

[0028] One end of the elastic sheet 321 is connected to the rotating shaft 1, for example, by welding, but is not limited thereto; the protruding part 322 is arranged at the movable end of the elastic sheet 321 Figure 2The lower end of the elastic sheet 321 is shown in the middle. The protrusion 322 is triangular or arc-shaped, or may be other shapes, as long as it can engage the knife handle. Thus, when disassembling or installing the knife handle 2, applying external force causes the pull stud at the end of the knife handle 2 to push the elastic collet 32 ​​to move radially. Figure 4 (The position indicated by the dashed line in the middle) That is, the protrusion 322 can move radially along the rotating shaft 1 by the deformation of the elastic sheet 321; so as to place or remove the tool holder 2 from the rotating shaft 1.

[0029] The movable component 33 is provided with an annular groove 7 and several receiving grooves 4. The receiving grooves 4 are evenly distributed around the rotating shaft 1. The elastic clamp 32 is installed in the receiving groove 4. The annular groove 7 is arranged around the receiving groove 4. The movable component 33 is movably disposed in the annular groove 7, that is, the movable component 33 is sleeved on the outside of the rotating shaft 1 and located in the annular groove 7. The annular groove 7 is used to limit the range of motion of the movable component 33. In an embodiment not shown, the range of motion of the movable component 33 can also be limited by setting a stop on the rotating shaft 1. The movable component 33 can be a split structure so as to disassemble and assemble it.

[0030] In this embodiment, the receiving groove 4 includes a first groove 41 and a second groove 42. The elastic clamp 32 is disposed in the first groove 41. The second groove 42 connects the first groove 41 and the cavity 10. The protrusion 322 extends into the cavity 10 through the second groove 42.

[0031] like Figure 2 As shown, in the normal state, i.e., when the electromagnetic drive component 31 is not energized, the movable component 33 can move to the lower section of the annular groove 7 by its own gravity. The movable component 33 will wrap around the movable end of the elastic chuck 32, preventing the elastic chuck 32 from moving radially and ensuring that the tool holder 2 can be clamped; Figure 3 When the tool holder 2 needs to be replaced, the electromagnetic drive component 31 is energized to generate a magnetic field that attracts the movable component 33 to move upward to the upper section of the annular groove 7, exposing the movable end of the elastic chuck 32. This provides radially movable space for the elastic chuck 32, facilitating the removal or placement of the tool holder 2. The electromagnetic drive component 31 only needs to be energized when assembling or disassembling the tool holder 2, eliminating the need for continuous energization and saving energy.

[0032] In order to avoid the abrasion between the rotating shaft 1 and the movable part 33 when the rotating shaft 1 rotates; the movable part 33 is provided with a limiting part, which is used to keep the movable part 33 rotating synchronously with the rotating shaft 1. Wherein, the limiting part is located inside the movable part 33 and clamped in the accommodating groove 4, the limiting part can be a protrusion, cooperating with the accommodating groove 4 to make the movable part 33 rotate with the rotating shaft 1.

[0033] In order to ensure that the movable part 33 can be quickly and accurately reset; a reset part 34 is also provided to assist the movable part 33 to move to the specified position, wherein the reset part 34 can be a spring; the reset part 34 is sleeved on the outside of the rotating shaft 1 and located in the annular groove 7, the two ends of the reset part 34 abut against the rotating shaft 1 and the movable part 33 respectively, when the electromagnetic driving part 31 is powered on, the movable part 33 moves upward and compresses the reset part 34; when the electromagnetic driving part 31 is powered off, the reset part 34 will push the movable part 33 to reset quickly.

Claims

1. A tool holder clamping mechanism for an ultrasonic spindle, characterized by: The utility model provides a kind of ultrasonic scalpel, including shell and knife handle, the knife handle is equipped with ultrasonic transducer, the shell is equipped with rotating shaft and driving part, the rotating shaft is rotatably connected the shell, and the driving part is used to drive the rotating shaft rotation; The rotating shaft is equipped with clamping unit, and the rotating shaft end is equipped with the cavity of placing the knife handle, and the clamping unit is used to clamp the knife handle and the rotating shaft synchronous rotation; The clamping unit includes electromagnetic drive component and movable component, and the elastic chuck on the rotating shaft, the elastic chuck can be moved and clamped or loosened the knife handle in the cavity in radial direction, and the electromagnetic drive component is used to drive the movable component and move along the axis direction and limit the elastic chuck movement.

2. The ultrasonic spindle tool holder chucking mechanism according to claim 1, characterized in that: The elastic chuck includes elastic sheet and protruding portion, one end of the elastic sheet is connected with the rotating shaft, and the protruding portion is arranged on the movable end of the elastic sheet to lock the knife handle.

3. The ultrasonic spindle tool holder chucking mechanism according to claim 1, wherein: The rotating shaft is evenly distributed with a plurality of accommodating grooves, and the elastic chuck is arranged in the accommodating groove.

4. The ultrasonic spindle tool holder chucking mechanism according to claim 3, characterized in that: Annular groove is arranged around the accommodating groove on the rotating shaft, and the movable component is movably arranged in the annular groove.

5. The ultrasonic spindle tool holder chucking mechanism according to claim 1, wherein: Limiting component is arranged on the movable component, and the limiting component can keep the movable component and the rotating shaft synchronous rotation.

6. The ultrasonic spindle tool holder chucking mechanism according to claim 1, wherein: Reset component is arranged between the rotating shaft and the movable component, and the reset component is used to drive the movable component to move and cover the elastic chuck, and limit the activity of the elastic chuck.

7. The ultrasonic spindle tool holder chucking mechanism according to claim 3, wherein: The accommodating groove includes first recess and second recess, and the second recess is communicated with the first recess and the cavity.

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