Clamping device and CNC equipment

Abstract

The utility model relates to the technical field of machining, and discloses a clamping device and CNC (computer numerical control) equipment, the clamping device comprises: a clamping piece, which is provided with a clamping part for clamping the periphery of a workpiece during elastic deformation; and the clamping driving mechanism is provided with a driving part, and the driving part acts on the clamping part and drives the clamping part to elastically deform. The clamping part can form a clamping cavity allowing a workpiece to be inserted, the outer cavity wall of the clamping cavity is provided with an inclined face inclining towards the central axis, and when the driving part and the inclined face are close to each other and abut against each other, the clamping part elastically deforms and applies extrusion force to the workpiece. According to the clamping device and the CNC equipment, flexible clamping of cylindrical products can be achieved, and the universality is good.

Description

Technical Field

[0001] This application belongs to the technical field of machining, and particularly relates to a clamping device and a CNC device. Background Art

[0002] During CNC machining, cylindrical products are difficult to be tightly adsorbed due to their small adsorption area, and vacuum jigs cannot be used for fixation. In the prior art, a vise is usually used to clamp cylindrical products. However, when using a vise for clamping, for cylindrical products with different diameters, aluminum plates need to be installed on the vise and programmed to machine different clamping apertures. Moreover, the procedures of disassembling the aluminum plates and clamping are complex, and the scrap rate of the aluminum plates is high, which is not conducive to reducing production costs. Summary of the Utility Model

[0003] The purpose of this application is to provide a clamping device and a CNC device that can flexibly clamp cylindrical products.

[0004] To achieve the above purpose, on the one hand, this application provides a clamping device, which includes:

[0005] A clamping member having a clamping portion that clamps the outer periphery of the workpiece when elastically deformed; and

[0006] A clamping driving mechanism having a driving portion that acts on the clamping portion and drives the clamping portion to elastically deform.

[0007] In some specific embodiments, the clamping portion may be formed with a clamping cavity for inserting the workpiece. The outer cavity wall of the clamping cavity has an inclined surface that inclines towards the central axis. When the driving portion approaches and abuts against the inclined surface, the clamping portion elastically deforms and applies an extrusion force to the workpiece.

[0008] In some specific embodiments, the clamping driving mechanism includes a hollow member provided with a through hole that is coaxial with the clamping cavity, and the driving portion is located in the through hole.

[0009] In some specific embodiments, the clamping driving mechanism further includes a cylindrical cavity, the clamping member is disposed in the cylindrical cavity, and the outer peripheral wall of the hollow member is threadedly connected to the cylindrical cavity.

[0010] In some specific embodiments, the clamping device further includes:

[0011] A locking mechanism having a positioning groove, and the clamping driving mechanism is located in the positioning groove.

[0012] In some specific embodiments, the locking mechanism includes a first locking component and a second locking component. One end of the second locking component is movably arranged on the first locking component. The first locking component has a first notch adapted to the outer peripheral wall of the clamping driving mechanism, and the second locking component has a second notch adapted to the outer peripheral wall of the clamping driving mechanism. The first notch and the second notch form the positioning groove.

[0013] In some specific embodiments, a limiting groove is provided on the first locking component. When the locking mechanism locks the clamping driving mechanism, the second locking component is received in the limiting groove.

[0014] In some specific embodiments, the locking mechanism further includes a locking driving component, and the output end of the locking driving component is connected to the second locking component.

[0015] In some specific embodiments, a shaft hole is provided on the bottom wall of the limiting groove, and the output end of the locking driving component extends out through the shaft hole and is connected to the second locking component.

[0016] Another aspect of the present utility model further provides a CNC device, and the CNC device includes the clamping device according to the above.

[0017] Through the above technical solution, the clamping member is provided with a clamping portion, and the clamping portion can undergo elastic deformation under the action of the driving portion of the clamping driving mechanism. When elastic deformation occurs, the clamping portion can clamp the outer periphery of the workpiece, thereby realizing the clamping of the product. Moreover, the elastic deformation amount of the clamping portion can be adjusted by the driving portion, so that the clamping opening of the clamping portion can be adjusted, and thus products with different diameters can be adapted. As a result, the clamping device can be applicable to products with different diameters without replacing components, realizing the flexible clamping of cylindrical products.

[0018] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific embodiments section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on the structures shown in these drawings without creative efforts. In the drawings:

[0020] Figure 1 is a schematic structural diagram of a clamping device according to a specific embodiment of the present utility model;

[0021] Figure 2 isFigure 1 Schematic structural diagram of the clamping device in

[0022] Figure 3 is Figure 1 Schematic structural diagram of the clamping device in

[0023] Figure 4 is Figure 3 Partial sectional view of the clamping device in

[0024] Figure 5 is Figure 1 Schematic structural diagram of the locking member in

[0025] Figure 6 Schematic structural diagram of the locking drive assembly according to another specific embodiment of the present invention.

[0026] Description of reference numerals

[0027] 1 Clamping member 11 Clamping cavity

[0028] 12 Inclined surface 13 Clamping teeth

[0029] 2 Clamping drive mechanism 21 Hollow member

[0030] 22 Sleeve 3 Fixed base

[0031] 31 First notch 32 Limit groove

[0032] 4 Locking member 41 Pivoting end

[0033] 42 Locking end 43 Second notch

[0034] 5 Locking drive assembly 51 Piston rod

[0035] 52 Column sleeve 521 Telescopic cavity

[0036] 522 Rim portion 53 T-shaped column core

[0037] 531 Wing portion 54 Elastic member

[0038] 55 Cylinder 6 Workpiece

[0039] 7 Base Specific embodiments

[0040] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present application, and are not intended to limit the present application. One aspect of the present invention provides a clamping device, such as Figure 2 , Figure 3and Figure 4 As shown in Figure 4 , the clamping device includes a clamping member 1 and a clamping driving mechanism 2. The clamping member 1 has a clamping portion that clamps the outer periphery of the workpiece 6 when elastically deformed. The clamping driving mechanism 2 has a driving portion that acts on the clamping portion and drives the clamping portion to elastically deform.

[0041] Since the clamping portion can elastically deform under the action of the driving portion of the clamping driving mechanism 2 and tighten the clamping opening, it can clamp the outer periphery of the workpiece, thereby realizing the fixation of the product. Moreover, the elastic deformation amount of the clamping portion can be adjusted by the driving portion, so that the clamping opening of the clamping portion can be changed, and thus products with different diameters can be clamped. This enables the clamping device to adapt to products with different diameters without replacing the clamping components, realizing flexible clamping of cylindrical products and having good versatility.

[0042] Among them, the structural forms of the clamping member 1 and the clamping driving mechanism 2 can be various, which will be illustrated by examples below.

[0043] In some specific embodiments, the clamping portion is formed with a clamping cavity 11 for inserting the workpiece 6. The outer cavity wall of the clamping cavity 11 has an inclined surface 12 that inclines towards the central axis. When the driving portion approaches and abuts against the inclined surface 12, the clamping portion elastically deforms and applies an extrusion force towards the workpiece 6.

[0044] Specifically, as Figure 2 , Figure 3 and Figure 4 shown, the clamping portion is formed with a clamping cavity 11. The workpiece 6 is a cylindrical product and its lower section is inserted into the clamping cavity 11 for fixation. The upper part of the outer cavity wall of the clamping cavity 11 is provided with an inclined surface 12 that inclines towards the central axis and the outer diameter of the inclined surface 12 gradually decreases along the direction close to the opening of the clamping cavity, so as to have a guiding effect when the driving portion approaches and abuts against the inclined surface 12. When the driving portion moves towards the clamping portion and approaches it, the driving portion acts on the inclined surface 12 and drives the clamping portion to elastically deform towards the central axis, thereby being able to reduce the clamping opening of the clamping portion. As the driving portion drives the clamping portion to deform to the clamping limit position, the clamping portion applies an extrusion force towards the workpiece 6, thereby being able to clamp the workpiece 6. Among them, for workpieces 6 with different diameters, the clamping portion can adapt to different elastic deformation amounts to reach the clamping limit position, so as to be able to adapt to the clamping of products with different diameters.

[0045] It should be noted that, in the above embodiments, the clamping part and the driving part are arranged opposite to each other. When the driving part approaches the clamping part, it can act on the inclined surface 12 to realize the elastic deformation of the clamping part. However, the present application is not limited to the above structure. For example, the driving part can be concentrically arranged on the outer peripheral side of the clamping part, and the clamping part realizes elastic deformation by the driving part moving along the concentric axis close to and acting on the outer peripheral wall of the clamping part. Other driving structure forms that can realize the elastic deformation of the clamping part should also fall within the protection scope of the present application.

[0046] Further, the clamping part may include a plurality of clamping teeth 13 arranged at intervals in the circumferential direction. A clamping cavity 11 is formed between the plurality of clamping teeth 13, and an inclined surface 12 is formed on the outer peripheral wall of the top of the clamping teeth 13. The inner peripheral walls of the tops of the plurality of clamping teeth 13 jointly define an opening of the holding cavity. Specifically, as Figure 2 , Figure 3 and Figure 4 shown, the clamping member 1 can be formed in a collet shape and includes a collet bottom wall. The outer peripheral portion of the collet bottom wall extends a plurality of clamping teeth 13 arranged at intervals in the circumferential direction toward the direction close to the opening of the clamping cavity.

[0047] Optionally, the clamping drive mechanism may include a through hole coaxial with the clamping cavity. The workpiece 6 can pass through the through hole and be inserted into the clamping cavity 11. Among them, the structures of the outer peripheral wall and the inner peripheral wall of the through hole can be various. The driving part is located in the through hole. For example, a driving structure capable of abutting against the inclined surface 12 is provided in the through hole, or the driving part can be formed on the inner peripheral wall of the through hole. The outer peripheral wall of the through hole can be an equal-diameter cylindrical surface, a stepped cylindrical surface, a polygonal prism surface or other irregular shapes, etc.

[0048] Optionally, as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the clamping drive mechanism may include a hollow member 21 arranged coaxially with the clamping member 1 and having an axial through hole. The driving part is located at one end of the hollow member 21 relatively close to the inclined surface 12 and is sleeved outside the clamping teeth 13. Specifically, as Figure 2 , Figure 3 and Figure 4 shown, the workpiece 6 passes through the axial through hole of the hollow member 21 and is inserted downward into the clamping cavity 11. The axial bottom end of the hollow member 21 is sleeved outside the clamping teeth 13. When the hollow member 21 moves downward, the axial bottom end of the hollow member 21 presses against the clamping teeth 13 and drives the clamping teeth 13 to elastically deform toward the central axis.

[0049] Those skilled in the art can understand that the clamping drive mechanism 2 of the present application is not limited to the above hollow member structure. The clamping drive mechanism 2 may also include a plurality of drive teeth corresponding to and driving the plurality of clamping teeth 13 one by one. Other structure forms that can realize abutting against the inclined surface 12 should also fall within the protection scope of the present application.

[0050] Optionally, the clamping drive mechanism may further include a barrel cavity, the clamping member 1 is disposed in the barrel cavity, and the outer peripheral wall of the hollow member 21 is threadedly connected to the barrel cavity. In this way, through the threaded connection between the outer peripheral wall of the hollow member 21 and the barrel cavity, the driving portion can be fixed in position when the clamping portion is at the clamping limit position, thereby realizing the clamping and fixing of the workpiece 6.

[0051] In some specific embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the clamping drive mechanism may further include a sleeve 22, the clamping member 1 is disposed in the barrel cavity of the sleeve 22, and the hollow member 21 is threadedly connected to the sleeve 22. The inner peripheral wall of the upper end of the sleeve 22 is provided with an internal thread, the outer peripheral wall of the lower end of the hollow member 21 is provided with an external thread, and the hollow member 21 can be moved up and down by being threadedly connected to the sleeve 22. The driving portion on the hollow member 21 can press against the inclined surface 12 of the clamping teeth 13 and be fixed in position when the clamping portion is at the clamping limit position.

[0052] Those skilled in the art can understand that the hollow member 21 and the sleeve 22 of the present application are not limited to the above-mentioned threaded connection method for cooperation. For example, the hollow member 21 can also be moved up and down by a driving member provided on the sleeve 22, and other structural forms capable of realizing the up and down movement of the hollow member 21 should also fall within the protection scope of the present application.

[0053] Optionally, the clamping device further includes a locking mechanism, the locking mechanism has a positioning groove, and the clamping drive mechanism is located in the positioning groove. In this way, the clamping drive mechanism can be fixedly installed. Among them, the groove wall of the positioning groove can be in a spliced form or integrally formed.

[0054] In some specific embodiments, the groove wall of the positioning groove is in a spliced form, the locking mechanism may include a first locking component and a second locking component, one end of the second locking component is movably disposed on the first locking component, the first locking component has a first notch 31 adapted to the outer peripheral wall of the clamping drive mechanism, the second locking component has a second notch 43 adapted to the outer peripheral wall of the clamping drive mechanism, and the first notch 31 and the second notch 43 form the positioning groove.

[0055] Specifically, the first locking component may include a fixed base 3, and the second locking component may include a locking member 4. The fixed base 3 is provided with a first notch 31, the locking member 4 has a pivoting end 41, a locking end 42 and a second notch 43, the second notch 43 is disposed on the locking end 42, and the pivoting end 41 is pivotally connected to the fixed base 3. The second notch 43 and the first notch 31 jointly define the positioning groove in the locking position of the locking member 4 and can lock the clamping drive mechanism 2 in the positioning groove.

[0056] Specifically, as Figure 1 , Figure 2 and Figure 5 shown, the clamping device further includes a base 7, and the fixed base 3 is installed on the base 7. The fixed base 3 includes an upper end portion and a lower end portion. The edge of the lower end portion bends upward and is connected to the edge of the upper end portion. The upper end portion of the fixed base 3 protrudes upward and jointly defines a receiving space with the base 7. The upper end portion of the fixed base 3 is provided with a first notch 31 that is open at the top and on the side. The first notch 31 communicates with the receiving space. One side outer peripheral wall of the sleeve 22 is adapted to the first notch 31, and the sleeve 22 of the clamping drive mechanism 2 is arranged in the first notch 31. The locking member 4 is in the shape of an arc-shaped plate. The pivot end 41 is located at one circumferential end of the locking member 4 and is pivotally connected to the fixed base 3. The locking end 42 is located at the other circumferential end of the locking member 4. The radially inner end of the locking end 42 defines a second notch 43. The locking member 4 can rotate around the pivot end 41 to switch between the locking position and the unlocking position. The locking end 42 locks the sleeve 22 of the clamping drive mechanism 2 in the positioning groove formed by the first notch 31 and the second notch 43 in the locking position, thereby fixing the clamping drive mechanism 2 on the fixed base 3.

[0057] In some specific embodiments, the first locking assembly is provided with a limiting groove 32. When the locking mechanism locks the clamping drive mechanism, the second locking assembly is received in the limiting groove 32, so that the second locking assembly can be fixed in the locking position. Among them, one limiting groove 32 can be provided and used to receive the pivot end 41 or the locking end 42 of the locking member 4. Alternatively, two limiting grooves 32 can be provided and used to receive the pivot end 41 and the locking end 42 of the locking member 4 respectively.

[0058] In addition, the locking mechanism may further include a locking drive assembly 5. The output end of the locking drive assembly 5 is connected to the second locking assembly. In this way, the locking drive assembly 5 can drive the second locking assembly to move, so that the locking member 4 can be switched between the locking position and the unlocking position.

[0059] Specifically, as Figure 3 shown, the fixed base 3 is provided with a limiting groove 32. The limiting groove 32 is open at the top and on the side and is in limiting cooperation with the pivot end 41. The bottom wall of the limiting groove 32 is provided with a shaft hole. The locking drive assembly 5 is disposed through the shaft hole. The locking drive assembly 5 includes an output end that extends upward from the shaft hole and is connected to the locking member 4. The output end has an extended position and a retracted position relative to the limiting groove 32. The locking member 4 is received in the limiting groove 32 and locks the clamping drive mechanism 2 in the retracted position of the output end. The locking member 4 disengages from the limiting groove 32 in the extended position of the output end, so that the locking end 42 of the locking member 4 can rotate around the pivot end 41 to the unlocking position.

[0060] Specifically, as Figure 1 , Figure 2 andFigure 3 As shown, a limiting groove 32 is provided at the upper end of the fixed base 3. The limiting groove 32 is located on one side of the first notch 31 and has an open top and side. The shape of the limiting groove 32 matches that of the pivoting end 41 to limit and cooperate with the pivoting end 41. A shaft hole is provided in the bottom wall of the limiting groove 32. The locking drive assembly 5 is passed through the shaft hole. The output end of the locking drive assembly 5 extends upward from the shaft hole and is rotatably connected to the locking member 4. The output end can extend upward and retract downward. The locking member 4 can be received in the limiting groove 32 at the retracted position of the output end. At this time, the locking end 42 is located at the locking position and locks the sleeve 22 in the first notch 31. In this specific embodiment, the locking drive assembly 5 is located below the locking member 4 and is received in the receiving space, but the present application is not limited thereto, as long as it can drive the locking member 4 to switch between the locking position and the unlocking position. For example, the locking drive assembly 5 can also be provided above the locking member 4 and can drive the locking member 4 to move up and down and rotate around the pivoting end 41.

[0061] In some specific embodiments, in order to be able to automatically lock the clamping drive mechanism 2, such as Figure 1 , Figure 2 and Figure 3 as shown, the locking drive assembly 5 can be an automatic telescopic structure and includes a cylinder 55. The cylinder 55 has a cylinder body provided below the shaft hole. The output end of the locking drive assembly 5 is the telescopic piston rod 51 of the cylinder 55. Among them, the structure of the cylinder 55 is well known to those skilled in the art and does not belong to the core improvement part of the present application, so it will not be described in detail here.

[0062] In other specific embodiments, such as Figure 6 as shown, the locking drive assembly 5 can be a manual telescopic structure and includes a column sleeve 52, a T-shaped column core 53, and an elastic member 54. The output end of the locking drive assembly 5 is the column sleeve 52, and the pivoting end 41 is fixedly connected to the column sleeve 52. The column sleeve 52 is provided with a telescopic cavity 521 with an open bottom. The edge portion 522 of the open bottom extends radially inward. The T-shaped column core 53 is passed through the telescopic cavity upward from the open bottom and has a wing-shaped portion 531 at the top. The elastic member 54 is located in the telescopic cavity 521 and is provided between the top surface of the edge portion 522 and the bottom surface of the wing-shaped portion 531. The elastic member 54 can be a return spring. An operator can pull the column sleeve 52 upward. At this time, the elastic member 54 is compressed, and the pivoting end 41 fixedly connected to the column sleeve 52 can be disengaged from the limiting groove 32 and rotated to the unlocking position. When it is necessary to lock the clamping drive mechanism 2, when the locking member 4 is rotated to be parallel to the locking position, the column sleeve is released. At this time, the elastic member 54 is reset, pulls the column sleeve 52, and further pulls the pivoting end 41 to be clamped in the limiting groove 32 to realize the locking of the clamping drive mechanism 2.

[0063] The second aspect of the present utility model provides a CNC device, and the CNC device includes the above-mentioned clamping device.

[0064] Among them, the installation steps of the clamping device are as follows:

[0065] 1. Install the base 7 on the workbench surface of the CNC equipment;

[0066] 2. Install the fixed base 3 on the base 7;

[0067] 3. Place the sleeve 22 in the first notch 31 of the fixed base 3;

[0068] 4. Install the clamping member 1 inside the sleeve 22;

[0069] 5. Install the hollow member 21 on the sleeve 22;

[0070] 6. Install the locking drive assembly 5 on the base 7 and the fixed base 3, and fix the pivot end 41 of the locking member 4 on the output end of the locking drive assembly 5;

[0071] 7. Rotate the pivot end 41 of the locking member 4 so that the second notch 43 of the locking end 42 adapts to the outer peripheral wall of the sleeve 22, and then snap the pivot end 41 of the locking member 4 into the limit groove 32 to fix the sleeve 22;

[0072] 8. Place the workpiece 6 into the sleeve 22 through the hollow member 21, rotate the hollow member 21, and the clamping member 1 is squeezed and locked by the hollow member 21, so as to clamp and fix the workpiece 6. At this time, the installation of the entire clamping device is completed.

[0073] In summary, the clamping device and the CNC equipment of the present utility model can realize the clamping of products, and the clamping part can adjust the elastic deformation amount through the driving part, so as to adjust the clamping opening of the clamping part, and further can adapt to products of different diameters, so that the clamping device can also be applicable to products of different diameters without replacing components, realizing the flexible clamping of cylindrical products.

[0074] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0075] In this application, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the connection inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0077] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A clamping device, characterized in that, Comprising: A clamping member (1) having a clamping portion that clamps the outer periphery of a workpiece (6) when elastically deformed; And A clamping drive mechanism (2) having a drive portion that acts on the clamping portion and drives the clamping portion to elastically deform; The clamping portion is formed with a clamping cavity (11) for inserting the workpiece (6). The outer cavity wall of the clamping cavity (11) has an inclined surface (12) inclined towards the central axis. When the drive portion approaches and abuts against the inclined surface (12), the clamping portion elastically deforms and applies a squeezing force towards the workpiece (6).

2. The clamping device according to claim 1, wherein The clamping drive mechanism (2) includes a hollow member (21) provided with a through hole coaxial with the clamping cavity, and the drive portion is located in the through hole.

3. The clamping device according to claim 2, wherein The clamping drive mechanism (2) further includes a cylindrical cavity, and the clamping member (1) is disposed in the cylindrical cavity. The outer peripheral wall of the hollow member (21) is threadedly connected to the cylindrical cavity.

4. The clamping device according to claim 1, characterized in that, The clamping device further includes: A locking mechanism having a positioning groove, and the clamping drive mechanism (2) is located in the positioning groove.

5. The clamping device according to claim 4, wherein, The locking mechanism includes a first locking component and a second locking component. One end of the second locking component is movably disposed on the first locking component. The first locking component has a first notch (31) adapted to the outer peripheral wall of the clamping drive mechanism (2), and the second locking component has a second notch (43) adapted to the outer peripheral wall of the clamping drive mechanism (2). The first notch (31) and the second notch (43) form the positioning groove.

6. The clamping device according to claim 5, characterized in that, The first locking component is provided with a limiting groove (32). When the locking mechanism locks the clamping drive mechanism (2), the second locking component is received in the limiting groove (32).

7. The clamping device according to claim 6, characterized in that, The locking mechanism further includes a locking drive assembly (5), and the output end of the locking drive assembly (5) is connected to the second locking component.

8. The clamping device according to claim 7, wherein, The bottom wall of the limiting groove (32) is provided with a shaft hole, and the output end of the locking drive assembly (5) extends out through the shaft hole and is connected to the second locking component.

9. A CNC device, characterized in that, Comprising the clamping device according to any one of claims 1 to 8.

Images