A floating chuck and a machining tool

Abstract

This utility model relates to the field of machining and discloses a floating clamping chuck and machining tool, including a chuck body, jaws, a drive valve, and a drive pipeline. The drive valve includes a valve core and a rocker arm, forming a first drive cavity and a second drive cavity between the valve core and the chuck body. The drive pipeline is connected to the first and second drive cavities and also to an external medium source. The external medium source delivers drive medium to the first and second drive cavities through the drive pipeline, driving the valve core to reciprocate. When the jaws clamp a shaft-like workpiece, the jaws that first contact the workpiece stop sliding, while the other jaws that are not in contact with the workpiece continue to move under the action of the drive medium until they contact the workpiece. After all the jaws are in contact with the workpiece, they clamp the workpiece under the pressure of the drive medium. Each jaw experiences the same driving force, and all the jaws simultaneously hold the workpiece with the same clamping force, which helps to improve machining accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of machining equipment and its peripheral supporting facilities, and in particular to a floating clamping chuck and machining machine tool. Background Technology

[0002] When machining shaft-type workpieces, the center hole of the workpiece is usually used as the machining positioning reference. A chuck provides the main clamping force, withstands the cutting torque, and is suitable for shaft-type workpieces of different diameters. At the same time, centers are used for auxiliary positioning to limit the axial movement of the workpiece and ensure coaxiality during machining. The chuck achieves positioning by clamping the outer circle or inner hole of the workpiece with jaws.

[0003] In the prior art, when shaft workpieces are centered at the center, the circumferentially distributed jaws cannot contact the workpiece simultaneously due to the differences in the workpiece's dimensional and geometric tolerances. This results in the jaws that contact the workpiece first exerting a pushing force on it, causing the workpiece to deform or be pushed away from the center, thus leading to low machining accuracy.

[0004] Therefore, how to change the current situation in the machining of shaft-type workpieces, where the clamping of the workpiece by the gripper easily leads to workpiece deformation and affects the machining accuracy, has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a floating clamping chuck and a machining tool to solve the problems existing in the above-mentioned related technologies, to avoid the problem of workpiece deformation caused by the clamping jaws, and to improve the machining accuracy of shaft workpieces.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a floating clamping chuck, comprising: A chuck body, which can be connected to the machine tool spindle; The gripper is slidably connected to the chuck body, and the sliding direction of the gripper is perpendicular to the direction of the machine tool spindle; there are multiple sets of grippers, and the grippers are evenly distributed around the axis of the machine tool spindle in the circumferential direction. A drive valve includes a valve core and a rocker arm. The valve core is slidably disposed within the chuck body, and a first drive cavity and a second drive cavity are formed between the valve core and the chuck body. The rocker arm is rotatably connected to the chuck body. The valve core and the gripper both abut against the rocker arm. The reciprocating sliding of the valve core can drive the rocker arm to swing, thereby pushing the gripper to slide. The drive valve corresponds one-to-one with the gripper. The driving pipeline is connected to the first driving cavity and the second driving cavity, and is also connected to an external medium source. The external medium source uses the driving pipeline to deliver driving medium to the first driving cavity and the second driving cavity, which can drive the valve core to reciprocate.

[0007] Preferably, the floating clamping chuck further includes a lower cover plate, which is detachably connected to the chuck body. The lower cover plate, the chuck body, and the valve core form a first driving cavity, and the valve core and the chuck body form a second driving cavity. A sealing element is provided between the lower cover plate and between the valve core and the chuck body. An angular pin is provided between the valve core and the chuck body.

[0008] Preferably, the rotation axis of the rocker arm is perpendicular to the axis of the machine tool spindle, the rocker arm has a first lever and a second lever, the sliding direction of the valve core is parallel to the axis of the machine tool spindle, the valve core has a first slot adapted to the first lever, the first lever rotatably extends into the first slot and abuts against the side wall of the first slot; the gripper has a second slot adapted to the second lever, the second lever rotatably extends into the second slot and abuts against the side wall of the second slot.

[0009] Preferably, the swing arm is rotatably connected to the chuck body via a swing shaft; The contact surfaces of the first lever and the first slot, and the contact surfaces of the second lever and the second slot, are both curved surfaces.

[0010] Preferably, the chuck body has a conveying channel, and the drive pipeline is connected to the first drive cavity and the second drive cavity via the conveying channel; The drive pipeline is detachably connected to the chuck body.

[0011] Preferably, the gripper includes a female gripper and a female gripper, the female gripper being slidably connected to the chuck body, the female gripper being detachably connected to the female gripper, and the female gripper being able to abut against a shaft-type workpiece.

[0012] Preferably, the female claw and the female claw are connected by screws; a positioning block is provided between the female claw and the female claw.

[0013] Preferably, the floating clamping chuck further includes an upper cover plate and a sealing cover, the sealing cover being sleeved on the chuck body, the upper cover plate being connected to the chuck body and fixing the axial position of the sealing cover and the female claw; The female claw is also connected to a sealing cover, which can slide back and forth with the female claw. A sealing element is provided between the sealing cover and the female claw, and the sealing cover is located on the top of the upper cover plate. Sealing elements are provided between the sealing cover and the upper cover plate and the chuck body, and between the sealing cover and the upper cover plate.

[0014] This utility model also provides a machine tool, including a machine tool spindle and the above-mentioned floating chuck, wherein the chuck body is connected to the machine tool spindle.

[0015] Preferably, the chuck body is connected to the machine tool spindle via a connecting flange.

[0016] This utility model achieves the following technical effects compared to related technologies: The floating chuck of this utility model includes a chuck body, jaws, a drive valve, and a drive pipeline. The chuck body can be connected to the machine tool spindle; the jaws are slidably connected to the chuck body, and the sliding direction of the jaws is perpendicular to the direction of the machine tool spindle; there are multiple sets of jaws, and the jaws are evenly distributed circumferentially around the axis of the machine tool spindle; the drive valve includes a valve core and a rocker arm, the valve core is slidably disposed in the chuck body, and a first drive cavity and a second drive cavity are formed between the valve core and the chuck body; the rocker arm is rotatably connected to the chuck body, and the valve core and the jaws abut against the rocker arm. The reciprocating sliding of the valve core can drive the rocker arm to swing, thereby pushing the jaws to slide; the drive valve and the jaws correspond one-to-one; the drive pipeline is connected to the first drive cavity and the second drive cavity, and the drive pipeline is also connected to an external medium source. The external medium source uses the drive pipeline to deliver drive medium to the first drive cavity and the second drive cavity, which can drive the valve core to reciprocate.

[0017] The floating clamping chuck of this utility model has a valve core slidably disposed within the chuck body, and the valve core and the chuck body form a first driving cavity and a second driving cavity. The driving pipeline delivers driving medium to the first driving cavity and the second driving cavity, which can drive the valve core to reciprocate. When the valve core moves, it drives the rocker arm to swing, thereby using the rocker arm to push the gripper to slide back and forth, realizing the gripper to reciprocate along the radial direction of the machine tool spindle, and completing the clamping and releasing of shaft-type workpieces. When clamping shaft-type workpieces, due to differences in the workpiece's dimensional and geometric tolerances, one of the circumferentially distributed jaws may contact the workpiece first. After contact, under the pressure of the driving medium supplied by the drive pipeline, the jaw that initially contacted the workpiece stops sliding. The other jaws that were not in contact with the workpiece continue to move under the pressure of the driving medium until they contact the workpiece. After all the jaws have contacted the workpiece, the drive pipeline continues to supply the driving medium. Under the pressure of the driving medium, the jaws clamp the workpiece, and the chuck body can be connected to the machine tool spindle, driving the workpiece to rotate for machining. After machining is completed, under the driving action of the driving medium supplied by the drive pipeline, the valve core drives the rocker arm to rotate in the opposite direction, thereby driving the jaws to move away from the machine tool spindle and disengage from the workpiece. The multiple grippers of this invention move under the action of the driving medium delivered by the driving pipeline. According to Pascal's law, each gripper is subjected to the same driving force, so that the gripping position of the grippers can be closely matched with the actual workpiece gripping position, realizing floating clamping. That is, all grippers simultaneously hold the workpiece with the same clamping force, effectively avoiding the problem in the prior art where the gripper that first contacts the workpiece applies a large clamping force, which leads to workpiece deformation or displacement. This is beneficial to improving the machining accuracy of shaft workpieces. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the floating clamping chuck disclosed in the embodiments of this utility model; Figure 2 This is a schematic diagram of the axial cross-sectional structure of the floating clamping chuck disclosed in the embodiment of this utility model; Figure 3 for Figure 2 Enlarged structural diagram at point K; Figure 4 This is a schematic diagram of the axial cross-sectional structure of the floating clamping chuck disclosed in the embodiments of this utility model at other angles; Figure 5This is a radial cross-sectional view of the floating clamping chuck disclosed in the embodiments of this utility model; Figure 6 This is a schematic diagram of the top of the floating clamping chuck disclosed in the embodiment of this utility model.

[0020] In the diagram: 1. Chuck body; 101. Conveying channel; 2. Drive valve; 3. Valve core; 301. First slot; 4. Swing rod; 401. First lever; 402. Second lever; 5. First drive cavity; 6. Second drive cavity; 7. Lower cover plate; 8. Angular pin; 9. Swing shaft; 10. Female claw; 1001. Second slot; 11. Female claw; 12. Upper cover plate; 13. Sealing cover; 14. Sealing cap; 15. Center; 16. Connecting flange; 17. Workpiece. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The purpose of this invention is to provide a floating clamping chuck and a machining tool to solve the problems existing in the above-mentioned related technologies, to avoid the problem of workpiece deformation caused by the clamping jaws, and to improve the machining accuracy of shaft workpieces.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1 This embodiment provides a floating clamping chuck; please refer to [reference needed]. Figures 1-6The system includes a chuck body 1, grippers, a drive valve 2, and drive lines. The chuck body 1 can be connected to the machine tool spindle. The grippers are slidably connected to the chuck body 1, and the sliding direction of the grippers is perpendicular to the direction of the machine tool spindle. There are multiple sets of grippers, which are evenly distributed around the axis of the machine tool spindle. The drive valve 2 includes a valve core 3 and a rocker arm 4. The valve core 3 is slidably disposed in the chuck body 1, and a first drive cavity 5 and a second drive cavity 6 are formed between the valve core 3 and the chuck body 1. The rocker arm 4 is rotatably connected to the chuck body 1. The valve core 3 and the grippers abut against the rocker arm 4. The reciprocating sliding of the valve core 3 can drive the rocker arm 4 to swing, thereby pushing the grippers to slide. The drive valve 2 corresponds one-to-one with the grippers. The drive lines are connected to the first drive cavity 5 and the second drive cavity 6, and the drive lines are also connected to an external medium source. The external medium source uses the drive lines to deliver drive medium to the first drive cavity 5 and the second drive cavity 6, which can drive the valve core 3 to reciprocate.

[0025] The floating clamping chuck of this utility model has a valve core 3 slidably disposed inside the chuck body 1, and the valve core 3 and the chuck body 1 form a first driving cavity 5 and a second driving cavity 6. The driving pipeline delivers the driving medium to the first driving cavity 5 and the second driving cavity 6, which can drive the valve core 3 to reciprocate. When the valve core 3 moves, it drives the rocker arm 4 to swing, thereby using the rocker arm 4 to push the gripper to slide back and forth, so as to realize the gripper to reciprocate along the radial direction of the machine tool spindle, and complete the clamping and releasing of the shaft workpiece 17. When the jaws clamp the shaft workpiece 17, due to the differences in the dimensional and geometric tolerances of the workpiece 17 itself, one of the circumferentially distributed jaws may contact the workpiece 17 first. After contact with the jaws, under the pressure of the driving medium supplied by the drive pipeline, the jaw that first contacted the workpiece 17 will no longer slide. The other jaws that have not contacted the workpiece 17 continue to move under the pressure of the driving medium until they contact the workpiece 17. After all the jaws have contacted the workpiece 17, the drive pipeline continues to supply the driving medium. Under the pressure of the driving medium, the jaws clamp the workpiece 17, and the chuck body 1 can be connected to the machine tool spindle, driving the workpiece 17 to rotate for processing. After processing is completed, under the driving action of the driving medium supplied by the drive pipeline, the valve core 3 drives the rocker arm 4 to rotate in the opposite direction, thereby driving the jaws to move away from the machine tool spindle and disengage from the workpiece 17. In this invention, multiple grippers move together under the action of the driving medium delivered by the driving pipeline. According to Pascal's law, each gripper experiences the same driving force, which allows the gripper's clamping position to match the actual workpiece 17's clamping position, achieving floating clamping. That is, all grippers simultaneously hold the workpiece 17 with the same clamping force, effectively avoiding the problem in the prior art where the gripper that first contacts the workpiece 17 applies a large clamping force, causing the workpiece 17 to deform or shift. This is beneficial for improving the machining accuracy of shaft workpieces 17.

[0026] In this specific embodiment, the driving medium is gas. In other specific embodiments that can be achieved by this utility model, other types of fluids can also be selected as the driving medium. Reasonably selecting the driving medium is a common practice of those skilled in the art, and will not be elaborated here.

[0027] The floating chuck of this invention also includes a lower cover plate 7, which is detachably connected to the chuck body 1. The chuck body 1 has a mounting hole adapted to the valve core 3. The lower cover plate 7 is connected to the chuck body 1 to seal the mounting hole, limiting the extreme sliding position of the valve core 3 and ensuring the structural stability of the drive valve 2. The lower cover plate 7, the chuck body 1, and the valve core 3 form a first drive cavity 5, and the valve core 3 and the chuck body 1 form a second drive cavity 6. Sealing elements are provided between the lower cover plate 7, the valve core 3, and the chuck body 1. The drive pipeline delivers the drive medium to the first drive cavity 5 and the second drive cavity 6, which can change the movement direction of the jaws, thereby enabling the jaws to clamp and release the workpiece 17. In this specific embodiment, the lower cover plate 7, the chuck body 1, and the bottom of the valve core 3 form a first driving cavity 5. Supplying driving medium into the first driving cavity 5 drives the valve core 3 to slide upwards. The valve core 3 drives the rocker arm 4 to swing, and the rocker arm 4 drives the gripper jaws to move towards the machine tool spindle axis, thereby clamping the workpiece 17. The middle part of the valve core 3 and the chuck body 1 form a second driving cavity 6. Supplying driving medium into the second driving cavity 6 via the driving pipeline drives the valve core 3 to slide downwards, causing the rocker arm 4 to swing. The rocker arm 4 then drives the gripper jaws to move away from the machine tool spindle axis, causing the gripper jaws to release the workpiece 17. Sealing elements are provided between the lower cover plate 7, the valve core 3, and the chuck body 1 to ensure the sealing of the first driving cavity 5 and the second driving cavity 6, preventing leakage of the driving medium.

[0028] To ensure the reliability of the reciprocating motion of the valve core 3, an angular pin 8 is provided between the valve core 3 and the chuck body 1, which improves the positioning accuracy of the valve core 3 and provides guiding assistance for the reciprocating motion of the valve core 3, further improving the working reliability of the drive valve 2.

[0029] The rocker arm 4 has a rotation axis perpendicular to the axis of the machine tool spindle. The rocker arm 4 has a first lever 401 and a second lever 402. The sliding direction of the valve core 3 is parallel to the axis of the machine tool spindle. The valve core 3 has a first slot 301 that is adapted to the first lever 401. The first lever 401 is rotatably inserted into the first slot 301 and abuts against the side wall of the first slot 301. The gripper has a second slot 1001 that is adapted to the second lever 402. The second lever 402 is rotatably inserted into the second slot 1001 and abuts against the side wall of the second slot 1001. When the valve core 3 reciprocates, the first lever 401 drives the rocker arm 4 to swing. The rocker arm 4 uses the second lever 402 to push the gripper to slide. The first lever 401 extends into the first slot 301 to ensure stable contact between the valve core 3 and the rocker arm 4. The sliding of the valve core 3 can drive the rocker arm 4 to swing, and the first lever 401 can rotate relative to the valve core 3, while preventing the valve core 3 from affecting the swing of the rocker arm 4. Similarly, when the rocker arm 4 swings, the second lever 402 pushes the gripper to slide. The second lever 402 can also rotate relative to the gripper to ensure the reliability of the rotation of the rocker arm 4.

[0030] In practical applications, the rocker arm 4 is rotatably connected to the chuck body 1 via the swing shaft 9, ensuring the structural stability and motion reliability of the rocker arm 4, while also improving the ease of disassembly and assembly of the drive valve 2. It should be noted that while the rocker arm 4 is rotatably connected to the chuck body 1, it is constrained by the valve core 3 and the grippers, causing the rocker arm 4 to swing within a certain range during operation and not to rotate in a circular path. Therefore, the descriptions of the rocker arm 4's rotation and oscillation are not contradictory.

[0031] In this specific embodiment, the contact surfaces of the first lever 401 and the first slot 301, and the contact surfaces of the second lever 402 and the second slot 1001, are both arc surfaces. The arc surfaces of the first lever 401 and the second lever 402 ensure stable contact between the first lever 401 and the valve core 3, and between the second lever 402 and the gripper, while preventing the valve core 3 and the gripper from affecting the swing motion of the lever 4.

[0032] Specifically, the chuck body 1 has a conveying channel 101, and the drive pipeline is connected to the first drive cavity 5 and the second drive cavity 6 via the conveying channel 101. In this specific embodiment, the conveying channel 101 includes a main channel and a branch channel to realize the medium conveying of each group of drive valves 2 and the first cavity and the second drive cavity 6 of each group of drive valves 2.

[0033] In practical applications, the drive pipeline and the chuck body 1 can be detachably connected for easy disassembly and maintenance. When the drive pipeline delivers the drive medium into the first drive chamber 5, the second drive chamber 6 can be connected to the external environment. Correspondingly, when the drive pipeline delivers the drive medium into the second drive chamber 6, the first drive chamber 5 can be connected to the external environment, avoiding interference with the reciprocating sliding motion of the valve core 3 and ensuring the operational reliability of the drive valve 2. It should also be noted that when the first drive chamber 5 and the second drive chamber 6 are connected to the external environment, this can be achieved by changing the connection position of the drive pipeline and the delivery channel 101 or adjusting the opening and closing state of the delivery channel 101. Adjusting the delivery path of the drive medium reasonably according to the working state of the chuck is a common practice among those skilled in the art and will not be elaborated upon here.

[0034] More specifically, the gripper adopts a split structure, comprising a female gripper 10 and a female gripper 11. The female gripper 10 is slidably connected to the chuck body 1, and the female gripper 11 is detachably connected to the female gripper 10, allowing the female gripper 11 to abut against the shaft-type workpiece 17. The gripper's structure of female gripper 10 and female gripper 11 facilitates replacement of the female gripper 11 after wear, and the detachable connection between the female gripper 10 and female gripper 11 streamlines the gripper's assembly and disassembly operations.

[0035] In practical applications, the female claw 10 and the female claw 11 can be connected by screws, which ensures a tight connection and facilitates easy assembly and disassembly. A positioning block is provided between the female claw 10 and the female claw 11 to ensure the accuracy of the connection and positioning, thereby improving the structural stability and operational reliability of the gripper.

[0036] Meanwhile, the floating clamping chuck of this utility model also includes an upper cover plate 12 and a sealing cover 13. The sealing cover 13 is sleeved on the chuck body 1. The upper cover plate 12 is connected to the chuck body 1 and fixes the axial position of the sealing cover 13 and the female claw 10, so as to prevent the sealing cover 13 and the female claw 10 from axial displacement and ensure the movement stability and reliability of the clamping claw.

[0037] The female claw 10 is also connected to a sealing cover 14, which can slide back and forth with the female claw 10. A sealing element is provided between the sealing cover 14 and the female claw 10 to prevent leakage. The sealing cover 14 is located on the top of the upper cover plate 12.

[0038] Accordingly, sealing elements are provided between the sealing cover 13 and the upper cover plate 12 and the chuck body 1, and between the sealing cover 14 and the upper cover plate 12, to prevent leakage and ensure that the grippers move smoothly under the driving action of the driving medium to clamp the workpiece 17.

[0039] Example 2 This utility model also provides a machine tool, including a machine tool spindle and a floating clamping chuck of Embodiment 1, wherein the chuck body 1 is connected to the machine tool spindle.

[0040] In practical applications, the chuck body 1 can be connected to the machine tool spindle via the connecting flange 16, improving the ease of assembly and disassembly of the machine tool.

[0041] The machining tool in this embodiment also includes a center point 15, which provides a stable rotation center for the workpiece 17 by fitting the tip of the center point 15 with the pre-made center holes at both ends of the shaft workpiece 17.

[0042] In this embodiment, the machining tool uses a center 15 for centering while using a floating chuck to clamp the shaft workpiece 17. Under the pressure of the driving medium, the jaw that first contacts the workpiece 17 stops sliding, while the other jaws continue to slide until they contact the workpiece 17. After all the jaws contact the workpiece 17, under the force of the driving medium, all the jaws are subjected to the same driving force. By adopting a floating clamping method, all the jaws clamp the shaft workpiece 17 with the same clamping force, which solves the problem in the prior art where the jaw that first contacts the workpiece 17 continues to feed along with the other jaws that have not yet contacted the workpiece 17, causing the workpiece 17 to deform, thus improving the machining accuracy of the shaft workpiece 17.

[0043] It should be explained here that in this invention, the jaw that first contacts the workpiece 17 applies a certain force to the workpiece 17 while the other jaws that have not yet contacted the workpiece 17 continue to move. Receiving a reaction force from the workpiece 17, the jaws cease movement. At this time, the other jaws continue to move under gas pressure. Since the gas is not fully compressed and the pressure is low, the load applied to the workpiece 17 by the jaw that first contacts it is extremely small, only enough to offset its own inertia and maintain contact with the workpiece 17. It exerts almost no substantial pressure on the workpiece 17, which is completely different from the existing technology where the jaw that first contacts the workpiece continues to move synchronously with the other jaws. As the cavity pressure gradually increases, the other jaws also gradually approach and contact the workpiece 17. The cavity pressure then continues to increase until it stabilizes at the set value. During this process, each gripper experiences the same driving force, ensuring that the gripper's clamping position aligns with the actual workpiece's clamping position, achieving floating clamping. This means all grippers simultaneously hold the workpiece with the same clamping force, effectively avoiding the problem in existing technologies where the gripper that first contacts the workpiece applies a large clamping force, leading to workpiece deformation or displacement. This improves the machining accuracy of shaft-type workpieces. Pascal's Law is common knowledge to those skilled in the art and will not be elaborated upon here.

[0044] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A floating clamping chuck, characterized in that, include: A chuck body, which can be connected to the machine tool spindle; The gripper is slidably connected to the chuck body, and the sliding direction of the gripper is perpendicular to the direction of the machine tool spindle; there are multiple sets of grippers, and the grippers are evenly distributed around the axis of the machine tool spindle in the circumferential direction. A drive valve includes a valve core and a rocker arm. The valve core is slidably disposed within the chuck body, and a first drive cavity and a second drive cavity are formed between the valve core and the chuck body. The rocker arm is rotatably connected to the chuck body. The valve core and the gripper both abut against the rocker arm. The reciprocating sliding of the valve core can drive the rocker arm to swing, thereby pushing the gripper to slide. The drive valve corresponds one-to-one with the gripper. The driving pipeline is connected to the first driving cavity and the second driving cavity, and is also connected to an external medium source. The external medium source uses the driving pipeline to deliver driving medium to the first driving cavity and the second driving cavity, which can drive the valve core to reciprocate.

2. The floating clamping chuck according to claim 1, characterized in that: It also includes a lower cover plate, which is detachably connected to the chuck body. The lower cover plate, the chuck body, and the valve core form the first driving cavity, and the valve core and the chuck body form the second driving cavity. Sealing elements are provided between the lower cover plate, the valve core, and the chuck body. An angular pin is provided between the valve core and the chuck body.

3. The floating clamping chuck according to claim 1, characterized in that: The rotation axis of the rocker arm is perpendicular to the axis of the machine tool spindle. The rocker arm has a first lever and a second lever. The sliding direction of the valve core is parallel to the axis of the machine tool spindle. The valve core has a first slot adapted to the first lever. The first lever is rotatably inserted into the first slot and abuts against the side wall of the first slot. The gripper has a second slot adapted to the second lever. The second lever is rotatably inserted into the second slot and abuts against the side wall of the second slot.

4. The floating clamping chuck according to claim 3, characterized in that: The swing arm is rotatably connected to the chuck body via a swing shaft. The contact surfaces of the first lever and the first slot, and the contact surfaces of the second lever and the second slot, are both curved surfaces.

5. The floating clamping chuck according to claim 1, characterized in that: The chuck body has a conveying channel, and the drive pipeline is connected to the first drive cavity and the second drive cavity through the conveying channel; The drive pipeline is detachably connected to the chuck body.

6. The floating clamping chuck according to any one of claims 1-5, characterized in that: The gripper includes a female gripper and a female gripper. The female gripper is slidably connected to the chuck body, and the female gripper is detachably connected to the female gripper. The female gripper can abut against shaft-type workpieces.

7. The floating clamping chuck according to claim 6, characterized in that: The female claw and the female claw are connected by screws; a positioning block is provided between the female claw and the female claw.

8. The floating clamping chuck according to claim 6, characterized in that: It also includes an upper cover plate and a sealing cover, the sealing cover being sleeved on the chuck body, the upper cover plate being connected to the chuck body and fixing the axial position of the sealing cover and the female claw; The female claw is also connected to a sealing cover, which can slide back and forth with the female claw. A sealing element is provided between the sealing cover and the female claw, and the sealing cover is located on the top of the upper cover plate. Sealing elements are provided between the sealing cover and the upper cover plate and the chuck body, and between the sealing cover and the upper cover plate.

9. A machine tool, comprising a machine tool spindle, characterized in that: It also includes the floating clamping chuck as described in any one of claims 1-8, wherein the chuck body is connected to the machine tool spindle.

10. The machine tool according to claim 9, characterized in that: The chuck body is connected to the machine tool spindle via a connecting flange.

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