A clamping assembly

Abstract

The utility model belongs to work piece processing technical field discloses a kind of clamping assemblies, including pedestal one and pedestal two, at least one of pedestal one and pedestal two can be moved relative to another;Top piece one and limiting piece are provided on pedestal one, top piece one can be rotated relative to the axis of top piece one of pedestal one;Buffering piece is provided between limiting piece and top piece one, when top piece one rotates around its axis, buffering piece is in non-rotating state;Top piece two is provided on pedestal two, top piece two can be rotated relative to the axis of top piece two of pedestal two;Further include drive mechanism one, for driving top piece one and / or top piece two rotate around its axis;Top piece one and top piece two relative movement to clamp or loosen work piece.The utility model is by setting buffering piece in upper top piece, can realize flexible clamping and self-adaptive compression to work piece, the structure can ensure that work piece keeps stable with positioning datum plane during annealing process, significantly improve the positioning accuracy and consistency of annealing area.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece processing technology, and in particular relates to a clamping component. Background Technology

[0002] In the assembly of aircraft wings and fuselages, blind rivets are key connecting components. Their working principle involves applying a sudden, high axial tensile force to the rivet's core, causing the high-temperature alloy rivet body to undergo plastic deformation in a pre-treated, precisely annealed area, forming a bulge and thus achieving a reliable connection between the wing and fuselage skin.

[0003] The core of this process lies in the quality of localized annealing of the rivet sleeve (workpiece). The surface heating temperature error in the annealing zone must not exceed ±10℃, and it must be highly consistent in terms of heating temperature and uniformity to ensure a uniform hardness distribution along the circumference of the rivet body after annealing. This uniform hardness is a fundamental prerequisite for achieving consistent riveting force and interchangeability of blind rivets, and is directly related to the integrity of the assembly structure and flight safety.

[0004] However, in existing processes, the rivet sleeve is typically clamped between upper and lower top parts during annealing. This type of rigid clamping system is poorly adaptable to micro-dimensional deviations in the rivets and changes in assembly posture, which can easily lead to a shift in the relative position between the rivet sleeve and the heating assembly. This shift directly causes problems such as inaccurate positioning of the annealing area and instability in the transition zone, thereby affecting the uniformity and consistency of the bulge formation, and ultimately posing a challenge to the connection strength and assembly reliability. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model discloses a clamping assembly. By setting a buffer on the upper top piece, flexible clamping and adaptive pressing of the workpiece can be achieved. This structure can ensure that the workpiece remains stable with the positioning reference surface during the annealing process, significantly improving the positioning accuracy and consistency of the annealing area.

[0006] The specific technical solution of this utility model is as follows: A clamping assembly includes a base one and a base two, at least one of which is movable relative to the other; The base is provided with a top member and a limiting member. The top member can rotate relative to the base about the axis of the top member. A buffer member is provided between the limiting member and the top member. When the top member rotates about its own axis, the buffer member is in a non-rotating state. The base two is provided with a top member two, which can rotate relative to the base two about the axis of the top member two; It also includes a drive mechanism 1, used to drive top member 1 and / or top member 2 to rotate about their own axis; The top member one and the top member two move relative to each other to clamp or release the workpiece.

[0007] This application, by incorporating a buffer, effectively prevents workpiece damage due to overload during clamping. Simultaneously, the buffer's adaptive characteristics ensure stable clamping of the workpiece, reliably meeting clamping requirements. During the annealing process, the workpiece needs to continuously rotate around its own axis; therefore, both top members 1 and 2 must possess rotational capability. However, with a buffer, if one end rotates with top member 1 while the other end remains fixed, the force state of the buffer changes, failing to provide a continuous and uniform clamping force. Therefore, this application configures the buffer to remain in a non-rotating state when top member 1 rotates, thereby avoiding clamping force fluctuations caused by structural asynchrony and ensuring a stable clamping effect for the workpiece throughout its rotation.

[0008] Preferably, a rotating joint is provided at the end of the top member one that is away from the top member two, and the buffer member is disposed between the rotating joint and the limiting member. The rotating joint is used to bear the axial force and, when the top member one rotates around its own axis, allows relative rotation between the top member one and the buffer member.

[0009] Maintaining the non-rotating state of the buffer component while the top component rotates can be achieved through a rotating pair, avoiding axial misalignment caused by the rotational connection between the buffer component and the top component, thus preventing the inability to continuously provide uniform clamping force.

[0010] Preferably, a sleeve is provided on the base, at least a portion of the top member is located inside the sleeve, and a bushing is sleeved on the outer side of the top member. And / or, a sleeve two is provided on the base two, at least a portion of the top member two is located inside the sleeve two, and a bushing two is sleeved on the outer side of the top member two.

[0011] The first sleeve can ensure that the axis of the first top piece is always located in a preset position. The first bushing is located between the first sleeve and the first top piece. The setting of the first bushing can effectively realize the radial positioning of the first top piece, thereby improving the relative rotation capability between the first top piece and the first sleeve; the same applies to the second sleeve and the second bushing.

[0012] Preferably, the first bushing and / or the second bushing are provided with ball bearings.

[0013] The ball bearing can improve the rotational capability of the responsive top part while ensuring the radial limit of the corresponding top part, thereby better meeting the rotational requirements of the workpiece.

[0014] Preferably, it also includes a slide rail, and the base one and base two are slidably connected on the slide rail; The first base is slidably connected to the slide rail via a drive mechanism, and the second base is slidably connected to the slide rail via a push screw.

[0015] Both base one and base two in this application can be adjusted to slide, which is beneficial to expanding the application conditions and thus better meeting the clamping requirements of the workpiece; the adjustment methods of base one and base two are different. The drive mechanism can achieve rapid and wide-range adjustment, while the push screw can well meet the fine adjustment requirements.

[0016] Preferably, it also includes a second drive mechanism, wherein the slide rail is disposed in the moving part of the second drive mechanism.

[0017] The second drive mechanism can achieve synchronous position adjustment of base one and base two, thereby better meeting the position requirements of actual working conditions.

[0018] Preferably, the base includes a first part and a second part, the first part being slidably connected to a slide rail, the second part being adjustablely disposed on the first part, and the limiting member being adjustablely disposed on the second part. The movement direction of the first part, the adjustment direction of the second part, and the adjustment direction of the limiting member are perpendicular to each other.

[0019] This structure can effectively achieve basic positioning between top part one and top part two, thereby ensuring stable rotation of the workpiece when clamping it, and thus better meeting the annealing requirements.

[0020] Preferably, the actuating part is provided with a base three; The top component 2 is provided with an airflow channel 1; The top part 2 is provided with a slip ring at the end away from the top part 1. The slip ring includes a fixed part and a rotating part. The rotating part is located inside the fixed part and is rotatably connected to the fixed part. The slip ring is connected to the airflow channel 1. The fixed part is connected to the base, and the rotating part is connected to the top part.

[0021] The slip ring can achieve negative pressure suction, thereby achieving the purpose of fixing the workpiece and heat dissipation. At the same time, it can also allow airflow, so that the corresponding holes can be cleaned when there is no workpiece. Since the slip ring includes a fixed part and a rotating part, it can also prevent air pipe entanglement.

[0022] Preferably, a metal heat sink is provided at one end of the top member two near the top member one; A heat dissipation sleeve is fitted on the outer side of the metal heat sink; The metal heat sink is provided with an airflow channel two, and the heat sink sleeve is provided with an airflow channel three. The airflow channel two is connected to the airflow channel one and the airflow channel three, and the airflow channel three is also connected to the outside.

[0023] During the annealing process, the metal heat sink can effectively meet the heat dissipation requirements, and the heat sink sleeve can improve the heat dissipation speed of the metal heat sink, thereby achieving a more effective heat dissipation effect.

[0024] Preferably, one of the two opposite ends of the top member one and the top member two is provided with a positioning post, and the other is provided with a conical ejector pin.

[0025] The positioning pin and conical ejector pin can stably place the workpiece and ensure that the workpiece's axis and rotation axis are aligned.

[0026] Compared with the prior art, this utility model has a simple and practical structure, effectively solving the problem that the buffer is difficult to continuously apply a stable clamping force during the rotation of the workpiece around its own axis, thereby effectively avoiding pressure fluctuations caused by the rotation of the workpiece; in addition, this utility model provides a stable clamping effect for the workpiece, so that the workpiece always maintains its position with the preset positioning reference surface during the annealing process, thereby ensuring the stability requirements of the annealing process and improving the heat treatment quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 for Figure 1 A partial sectional view; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the top component one in an embodiment of the present utility model; Figure 5 This is a schematic diagram of the top component two in an embodiment of this utility model; Figure 6 This is a schematic diagram of base one in an embodiment of the present utility model; Figure 7 for Figure 2 Enlarged view of point B.

[0028] In the diagram: 100-Workpiece; 1-Base 1; 2-Base 2; 3-Top component 1; 4-Limiting component; 5-Buffer component; 6-Top component 2; 7-Drive mechanism 1; 8-Positioning pin; 9-Conical ejector pin; 10-Metal heat sink; 11-Heat sink sleeve; 12-Mounting platform 2; 13-Rotating pair; 14-Mounting platform 1; 15-Positioning platform; 16-Positioning protrusion; 17-Sleeve 1; 18-Shaft sleeve 1; 19-Snap ring; 20-Sleeve 2; 21-Shaft sleeve 2; 22-Slip ring; 23-Slide rail; 24-Drive mechanism 2; 25-Base 3; 26-Separation part 1; 27-Separation part 2; 28-Adjusting screw a; 29-Adjusting screw b; 30-Actuating part; 31-Airflow channel 1; 32-Airflow channel 2; 33-Airflow channel 3. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0030] like Figures 1-2 As shown, a clamping assembly includes a base 1 and a base 2, at least one of which is movable relative to the other; a top member 3 and a limiting member 4 are disposed on the base 1, the top member 3 being rotatable relative to the base 1 about the axis of the top member 3; a buffer member 5 is disposed between the limiting member 4 and the top member 3, the buffer member 5 being in a non-rotating state when the top member 3 rotates about its own axis; a top member 6 is disposed on the base 2, the top member 6 being rotatable relative to the base 22 about the axis of the top member 6; and a driving mechanism 7 is further included for driving the top member 3 and / or the top member 6 to rotate about their own axes; the relative movement of the top member 3 and the top member 6 is used to clamp or release the workpiece 100.

[0031] In this embodiment, both the base 1 and the base 2 can reciprocate vertically. When they move closer to each other, they can clamp the workpiece 100. When they move further apart, the workpiece 100 can be removed from between the top piece 3 and the top piece 6. Of course, the workpiece 100 can also be placed there at this time.

[0032] like Figures 3-5 As shown, to better clamp the workpiece 100, one of the two opposite ends of the top member 3 and the top member 6 is provided with a positioning post 8, and the other is provided with a conical ejector pin 9. Specifically, in this embodiment, the top member 3 is provided with a conical ejector pin 9 to position the small-diameter end of the workpiece 100, and the top member 6 is provided with a positioning post 8 to position the large-diameter end of the workpiece 100. Generally speaking, the diameter of the positioning post 8 is similar to the diameter of the small-diameter end, thus better meeting the placement requirements of the workpiece 100.

[0033] In this embodiment, a metal heat sink 10 is provided at one end of the top member 2 6 near the top member 1 3; a heat sink sleeve 11 is fitted on the outer side of the metal heat sink 10. A mounting platform 2 12 is provided at the end of the top member 2 6, and the metal heat sink 10 is placed on the mounting platform 2 12. At this time, a positioning post 8 can be placed on the metal heat sink 10, thereby improving heat dissipation performance. The heat sink sleeve 11 further enhances the heat dissipation effect. The metal heat sink 10 is preferably a copper base, and the heat sink sleeve 11 can be made of aluminum alloy, ceramic, etc. Furthermore, the mounting platform 2 12 has a protruding structure, through which the metal heat sink 10 connects with the mounting platform 2 12. In addition, to meet heat dissipation requirements and structural optimization requirements, the positioning post 8 or a conical pin 9 is provided on the metal heat sink 10.

[0034] In this embodiment, the limiting member 4 is a cover structure, and the buffer member 5 is located inside the limiting member 4. Thus, by limiting one end of the buffer member 5 with the limiting member 4, the function of the buffer member 5 can be prevented from being affected by external dust and other impurities.

[0035] In some embodiments, one end of the buffer member 5 is fixedly connected to the limiting member 4, and the other end is movably connected to the top member 3. That is, when the top member 3 rotates, the buffer member 5 can remain in a non-rotating state. However, since the buffer member 5 itself has deformation capability, the rotation of the top member 3 may still cause the buffer member 5 to rotate. Therefore, the adaptive clamping force of the buffer member 5 on the workpiece 100 is unstable. Thus, in this embodiment, a rotating joint 13 is provided at the end of the top member 3 away from the top member 6. The buffer member 5 is disposed between the rotating joint 13 and the limiting member 4. The rotating joint 13 is used to bear the axial force and, when the top member 3 rotates around its own axis, allows relative rotation between the top member 3 and the buffer member 5. Specifically, the top member 3 has a mounting platform 14 at its end, and the rotating joint 13 is mounted on the mounting platform 14. The rotating joint 13 has a moving part and a stationary part. The moving part is connected to the mounting platform 14, and the stationary part has a positioning platform 15 with a positioning protrusion 16. Thus, the buffer member 5 is placed on the positioning platform 15 via the positioning protrusion 16. Furthermore, the mounting platform 14 has a groove structure, and the moving part of the rotating joint 13 is located in the groove structure. Therefore, when the top member 3 rotates around itself, the buffer member 5 can maintain a non-rotating state.

[0036] In this embodiment, the rotating pair 13 is configured as a thrust bearing, which can effectively bear axial forces and allow relative rotation between the top member 3 and the buffer member 5 when the top member 3 rotates around its own axis. In other embodiments of this embodiment, the rotating pair 13 can also be configured as a self-lubricating bearing, a tapered roller bearing, a thrust washer, etc.

[0037] It should be noted that in this embodiment, one end of the workpiece 100 contacts the top member 3 and the other end contacts the top member 6. Therefore, in order to ensure the smooth rotation of the workpiece 100, the optimal implementation is that the top member 3 and the top member 6 rotate synchronously. Thus, in order to improve the rotation performance of the top member 3 and the top member 6, a sleeve 17 is provided on the base 1. At least a part of the top member 3 is located inside the sleeve 17, and a bushing 18 is sleeved on the outer side of the top member 3. Furthermore, the bushing 18 is provided with balls. One end of the bushing 18 is received by the inner ring of the sleeve 17, and the other end of the bushing 18 is axially limited by the snap ring 19. This structure is simple and easy to assemble. In other embodiments, thrust needle roller bearings can also be used for axial limitation at both ends of the bushing 18. For the top part 3 or the top part 6, one of the thrust needle roller bearings can be limited by the mounting platform 14 or the mounting platform 22, and the other can be limited by the locking nut. The bushing 18 has a ball groove, and the balls are placed in the groove. Thus, the bushing 18 can realize the function of a bearing, which can ensure that it is aligned with the rotation axis of the top part 3 while facilitating installation, effectively improving the rotation efficiency of the top part 3. Similarly, for the top part 6, the base 2 is provided with a sleeve 20, at least a part of the top part 6 is located inside the sleeve 20, and the outer side of the top part 6 is fitted with a bushing 21; the bushing 21 is provided with balls.

[0038] like Figure 1 and Figure 2 As shown, in this embodiment, the second top member 6 is a hollow shaft. Based on this, in this embodiment, a slip ring 22 is provided at the end of the second top member 6 away from the first top member 3. The slip ring 22 includes a fixed part and a rotating part. The rotating part is located inside the fixed part and is rotatably connected to the fixed part. The slip ring 22 communicates with the airflow channel 31. The fixed part is connected to the second base 2, and the rotating part is connected to the second top member 6. The slip ring 22 has a switching channel for positive and negative airflow. Of course, the switching between positive and negative airflow can also be achieved by connecting the slip ring 22 to different air pipes. During the annealing process, negative airflow can provide stability for the placement of the workpiece 100 and can remove some heat during heating. When the workpiece 100 is not clamped between the first top member 3 and the second top member 6, positive airflow can cool the placement position of the workpiece 100, providing a good annealing foundation for the next workpiece 100. In addition, positive airflow can also clear the airflow channel. Furthermore, as... Figure 7As shown, the metal heat sink 10 is provided with an airflow channel 2 32, and the heat sink sleeve 11 is provided with an airflow channel 33. The airflow channel 2 32 connects to the airflow channel 1 31 and the airflow channel 33, and the airflow channel 33 also connects to the outside. It should be noted that the negative pressure airflow enters the airflow channel 1 31 from the slip ring 22, and then acts on the metal heat sink 10 to stabilize the placement of the metal heat sink 10 while simultaneously drawing in outside air to dissipate heat from the heated area.

[0039] As can be seen from the above, the clamping assembly in this embodiment enables the start and stop of positive and negative airflow, which has a good performance. During the annealing process, the top part 3 and the top part 6 will rotate, and the air pipe connected to the top part 6 will also become entangled. Therefore, by setting the slip ring 22, the air pipe can be effectively prevented from becoming entangled, thereby improving the safety of use in this embodiment.

[0040] In this embodiment, the drive mechanism 7 is configured as a synchronous belt mechanism, a gear mechanism, or a chain mechanism. For ease of installation and structural simplification, as a preferred embodiment, such as... Figure 1 As shown, the drive mechanism 7 is configured as a synchronous belt mechanism. The drive mechanism 7 is used to drive the top member 6 to rotate around its own axis. Furthermore, it also includes a slide rail 23, on which the base 1 and base 2 are slidably connected. Driven by a linear motion module, or by a cylinder mechanism, gear and rack mechanism, lead screw mechanism, etc., it can be achieved. Therefore, in this embodiment, base 1 and base 2 can reciprocate along a straight line relative to the other. In other embodiments, clamping or releasing the workpiece 100 can also be achieved by the relative rotation of base 1 and base 2. Furthermore, in this embodiment, it also includes a drive mechanism 24, with the slide rail 23 disposed in the actuating part 30 of the drive mechanism 24. Specifically, in addition to the slide rail 23, the actuating part 30 also has a base 25. The fixed end of the synchronous belt mechanism is set on the base, and the driving end of the synchronous belt mechanism is set with pulley one. Pulley two is set on the top part 2 6. The top part 2 6 is driven by the synchronous belt meshing with pulley one and pulley two. Based on this structure, the driving mechanism one 7 drives the top part 2 6 to rotate, and the driving force is transmitted to the workpiece 100, causing the workpiece 100 to rotate. Then, the workpiece 100 drives the top part one 3 to rotate. Since the workpiece 100 is clamped by the top part one 3 and the top part two 6, and the buffer 5 can provide adaptive clamping force, the requirement of the annealing process can be well met by using only the driving mechanism one 7 to drive the top part two 6 to rotate.

[0041] In this embodiment, the second drive mechanism 24 is a linear displacement mechanism. When the linear displacement mechanism operates, its moving part 30 can reciprocate vertically, thereby carrying the slide rail 23 and the base 25 in synchronous motion. It should be noted that the relative position between the base 25 and the moving part 30 is determined, and the second base 2 can move relative to the moving part 30. The relative position adjustment of the second base 2 is usually performed before the workpiece 100 is processed, with the aim of determining the optimal placement position of the workpiece 100. The optimal placement position can also be achieved through the second drive mechanism 24. In this way, one achieves a large-range adjustment and the other achieves a small-range adjustment. For example, the movement of the moving part 30 achieves a large-range adjustment (coarse adjustment) of the placement position of the workpiece 100, while the movement of the second base 2 achieves a small-range adjustment (fine adjustment). Thus, in the actual clamping and releasing of the workpiece 100, the displacement of the first base 1 is sufficient. Furthermore, in this embodiment, the adjustment of the base 1 can be achieved by a cylinder, and the adjustment of the base 2 can be achieved by a push screw. This not only facilitates the quick clamping and releasing of the workpiece 100, but also allows for faster fine-tuning, which is more conducive to saving costs and reducing assembly volume. In other embodiments, the base 1 can also be implemented by a gear and rack mechanism, a linear module, etc. In the specific annealing process, the workpiece 100 is moved in the heating zone of the heating assembly by the action of the drive mechanism 24 to realize the annealing process; of course, a three-axis slide can also be set in the heating assembly, which moves in three mutually perpendicular directions to meet its own positioning requirements and the heating requirements of the workpiece 100.

[0042] like Figure 6 As shown, in this embodiment, the base 1 includes a first part 26 and a second part 27. The first part 26 is slidably connected to the slide rail 23. The second part 27 is adjustablely disposed on the first part 26, and the limiting member 4 is adjustablely disposed on the second part 27. Specifically, the second part 27 can be slidably adjusted on the first part 26 by adjusting screw a28, and the limiting member 4 can be slidably adjusted on the second part 27 by adjusting screw b29. The movement direction of the first part 26, the adjustment direction of the second part 27, and the adjustment direction of the limiting member 4 are perpendicular to each other. Thus, with the axis of the second top part 6 as a reference, it is ensured that the axis of the first top part 3, the axis of the buffer part 5, and the axis of the second top part 6 are coaxial, thereby better ensuring the rotation requirements of the workpiece 100 in the annealing process.

[0043] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A clamping assembly, characterized in that, It includes a base one (1) and a base two (2), at least one of which is movable relative to the other; The base (1) is provided with a top part (3) and a limiting part (4). The top part (3) can rotate relative to the base (1) around the axis of the top part (3). A buffer part (5) is provided between the limiting part (4) and the top part (3). When the top part (3) rotates around its own axis, the buffer part (5) is in a non-rotating state. The base two (2) is provided with a top member two (6), which can rotate about the axis of the top member two (6) relative to the base two (2); It also includes a drive mechanism (7) for driving top member one (3) and / or top member two (6) to rotate about their own axis; The top member one (3) and the top member two (6) move relative to each other to clamp or release the workpiece (100).

2. The clamping assembly as described in claim 1, characterized in that, The top part 1 (3) is provided with a rotating joint (13) at the end away from the top part 2 (6). The buffer (5) is provided between the rotating joint (13) and the limiting part (4). The rotating joint (13) is used to bear the axial force and when the top part 1 (3) rotates around its own axis, it causes relative rotation between the top part 1 (3) and the buffer (5).

3. A clamping assembly as described in claim 1, characterized in that, A sleeve (17) is provided on the base (1), at least a part of the top member (3) is located inside the sleeve (17), and a bushing (18) is sleeved on the outside of the top member (3). And / or, a sleeve two (20) is provided on the base two (2), at least a portion of the top member two (6) is located inside the sleeve two (20), and a bushing two (21) is sleeved on the outside of the top member two (6).

4. A clamping assembly as described in claim 3, characterized in that, The first bushing (18) and / or the second bushing (21) are provided with ball bearings.

5. A clamping assembly as described in claim 1, characterized in that, It also includes a slide rail (23), and the base one (1) and base two (2) are slidably connected on the slide rail (23); Among them, the first base (1) is slidably connected to the slide rail (23) through the drive mechanism, and the second base (2) is slidably connected to the slide rail (23) through the push screw.

6. A clamping assembly as described in claim 5, characterized in that, It also includes a second drive mechanism (24), wherein the slide rail (23) is disposed in the actuating part (30) of the second drive mechanism (24).

7. A clamping assembly as described in claim 5, characterized in that, The base (1) includes a first part (26) and a second part (27). The first part (26) and the slide rail (23) are slidably connected. The second part (27) is adjustablely disposed on the first part (26). The limiting member (4) is adjustablely disposed on the second part (27). The movement direction of the first part (26), the adjustment direction of the second part (27), and the adjustment direction of the limiting member (4) are perpendicular to each other.

8. A clamping assembly as described in claim 6, characterized in that, The actuating part (30) is provided with a base three (25); The top component 2 (6) is provided with an airflow channel 1 (31); The top part 2 (6) is provided with a slip ring (22) at the end away from the top part 1 (3). The slip ring (22) includes a fixed part and a rotating part. The rotating part is located inside the fixed part and is rotatably connected to the fixed part. The slip ring (22) is connected to the airflow channel 1 (31). The fixed part is connected to the base three (25), and the rotating part is connected to the top part two (6).

9. A clamping assembly as described in claim 8, characterized in that, The top part 2 (6) is provided with a metal heat sink (10) at one end near the top part 1 (3); The metal heat sink (10) is fitted with a heat sink sleeve (11) on its outer side. The metal heat sink (10) is provided with airflow channel two (32), and the heat sink sleeve (11) is provided with airflow channel three (33). The airflow channel two (32) is connected to airflow channel one (31) and airflow channel three (33), and the airflow channel three (33) is also connected to the outside.

10. A clamping assembly as claimed in claim 1, characterized in that, One of the top piece 1 (3) and the top piece 2 (6) is provided with a positioning post (8) at one of its two opposite ends, and a conical ejector pin (9) at the other.

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