Clamping device and clamp

Abstract

A clamping device, comprising: a base body (100) having an operating cavity (110); a clamping member (200) comprising a driving end (210) and a clamping end (220) connected to each other, wherein the driving end is located in the operating cavity, and the clamping end is configured to abut against and fix an object (1) to be clamped; and an adjusting member (300) mounted in the operating cavity, wherein the adjusting member, the driving end and the operating cavity cooperate to form a driving cavity (120), the driving cavity is used for accommodating an operating medium, the operating medium is used for pushing the driving end to move, such that the clamping end abuts against the object to be clamped, and when the operating medium is discharged from the driving cavity, the driving end can abut against the adjusting member so as to release the object to be clamped. In the operating cavity, the position of the adjusting member can be adjusted, so as to change the gap between the clamping end and the object to be clamped in a loosened state. A clamp using the clamping device is further provided.

Description

A clamping device and clamp Technical Field

[0001] This invention relates to the field of clamping technology, and particularly to a clamping device and clamping device. Background Technology

[0002] Clamping devices are high-performance functional components used in conjunction with rolling linear guide pairs. They are widely used in CNC machine tools, automated production lines, and other mechanical equipment requiring high precision and stability. Due to their powerful clamping force, clamping devices effectively prevent vibration during operation, enabling precise positioning. For example, in linear motor-driven machine tools, clamping devices can be used to fix the worktable, prevent vibration, and improve machining accuracy; in glass double-sided lathes, clamping devices can be used to hold glass plates, ensuring stability and safety during processing.

[0003] Clamping devices are categorized into hydraulic clamping devices and pneumatic clamping devices. Compared to pneumatic clamping devices, hydraulic clamping devices offer advantages such as stable and powerful clamping force and less object movement when clamped. However, currently available hydraulic clamping devices have complex structures, difficult parts manufacturing, and high costs. They also require more installation space, as their large size makes them unsuitable for smaller installation spaces. Furthermore, when clamping and positioning require a clamping force greater than necessary, larger clamping devices or an increased number of clamping devices are required to achieve this, leading to high production costs. Additionally, during workpiece processing, the clamping device needs repeated positioning. After multiple clamping and releasing cycles, deviations in the gap between the clamping device and the workpiece can occur, resulting in decreased machining accuracy and affecting product precision and quality. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a clamping device and a gripper. The gripper utilizes this clamping device, which has a compact structure and small size, allowing for installation and use even in situations with limited space. Furthermore, its simple structure and low manufacturing cost reduce production costs. Simultaneously, the gripper of this application provides strong holding force, stable clamping, and high rigidity, ensuring that the processing requires strong holding force and high precision, thus meeting the user's processing needs. Moreover, by changing the gap size, the gripper can be applied to workpieces of various sizes, improving its versatility.

[0005] In a first aspect, a clamping device according to an embodiment of the present invention includes:

[0006] The base has a working cavity;

[0007] The clamping component includes a drive end and a clamping end connected to each other. The drive end is located in the working cavity, and the clamping end is used to abut against and fix the object to be clamped.

[0008] An adjusting component is installed in the working chamber. The adjusting component, the driving end, and the working chamber cooperate to form a driving chamber. The driving chamber is used to contain the working medium. The working medium is used to push the driving end to move so that the clamping end abuts against the object to be clamped. When the working medium is discharged from the driving chamber, the driving end can abut against the adjusting component to release the object to be clamped.

[0009] In the working chamber, the adjusting component can be positioned to change the gap between the clamping end and the object to be clamped in the loosened state.

[0010] The clamping device according to embodiments of the present invention has at least the following beneficial effects: by adjusting the position of the adjusting member within the working cavity to change the gap between the clamping end of the clamping member and the object to be clamped, it has high flexibility and adaptability, can meet the clamping requirements of guide rails of different sizes, and improves the versatility of the clamper. The specific working principle is as follows: when the working medium continuously enters and fills the drive cavity, the working medium pushes the drive end of the clamping member to move, thereby causing the clamping end to move towards the object to be clamped, gradually reducing the gap between the clamping end and the object until the clamping member clamps and fixes the object. When the object is finished being processed, the working medium is discharged. At this time, the drive end resets and drives the clamping end away from the object. When the clamping end is disengaged from the object, the object is in a released state, while the drive end continues to approach the adjusting member and eventually abuts against the adjusting member. The gap between the clamping end of the clamping member and the object to be clamped can be adjusted by adjusting the position of the adjusting member within the working cavity, thereby meeting the fixing requirements of workpieces of different sizes and improving the versatility of the clamper. Understandably, if the size of the object to be clamped is larger than the distance between the two clamping ends, the user can increase the distance between the two clamping ends by adjusting the position of the adjusting element within the working cavity to accommodate the object of the current size. That is, when the size of the object to be clamped changes, the clamping device can be easily adjusted to adapt to different sizes by adjusting the position of the adjusting element, improving the versatility and flexibility of the clamping device. It eliminates the need to replace the entire clamping device or clamping element; simply adjusting the position of the adjusting element is sufficient to accommodate different sizes of objects. Adjusting the gap to adapt to different sizes avoids the need for frequent replacements of the clamping device or clamping element, thereby reducing production and maintenance costs. Furthermore, it allows for precise control of the gap between the clamping end and the object to be clamped, which is particularly important for applications requiring strict control of clamping force or gap, such as precision manufacturing and automated assembly. In addition, an appropriate gap ensures that the clamping force is evenly distributed when applied, preventing excessive local stress that could damage the object or result in poor clamping performance. Adjusting the gap optimizes the clamping effect and improves the stability and reliability of the clamping process. In some cases, excessive clamping can damage the surface of the object being clamped. Adjusting the gap can reduce the pressure of the clamping end on the object, thus protecting the object's surface from damage.

[0011] It should be noted that the working medium can be hydraulic oil or other media. This application does not specifically limit the type of working medium, and users can choose according to the actual situation.

[0012] According to an embodiment of the present invention, a clamping device includes an adjusting member comprising an outer annular groove, the outer annular groove being located on the side of the adjusting member near the driving end, the outer annular groove being open toward the driving end, and the outer annular groove being used to form a driving cavity;

[0013] And / or, the adjusting member includes a boss located on the side of the adjusting member closer to the drive end, the adjusting member abutting against the drive end through the top of the boss, and the gap around the boss is used to form a drive cavity.

[0014] According to an embodiment of the present invention, an adjusting member has a first groove located on the side of the adjusting member near the driving end. The first groove is used to form a driving cavity. The adjusting member has a gas-liquid boosting device with a connecting hole communicating with the driving cavity. The connecting hole is located at the bottom of the first groove.

[0015] According to an embodiment of the present invention, a clamping device is provided with a positioning ring groove on the adjusting member and / or the driving end. A sealing ring and a sealing ring are fitted into the positioning ring groove, and the sealing ring and the sealing ring are used to abut against the cavity wall of the working cavity to seal it.

[0016] According to an embodiment of the present invention, a clamping device has an elastic element provided in the working cavity. The elastic element is located on the side of the driving end away from the adjusting element, and the elastic element is used to drive the driving end to approach and abut against the adjusting element.

[0017] According to an embodiment of the present invention, the clamping device uses hydraulic oil as the working medium, and the adjusting component has an oil supply circuit for providing hydraulic oil, the oil supply circuit being connected to a gas-hydraulic booster device.

[0018] According to an embodiment of the present invention, a clamping device comprises several pairs of clamping members and adjusting members, wherein a pair of clamping members clamps the object to be clamped.

[0019] According to an embodiment of the present invention, a clamping device has a base having a clamping cavity, and clamping elements are provided on the sidewalls of the clamping cavity.

[0020] According to an embodiment of the present invention, the working medium is hydraulic oil, and the base has an oil supply line for providing hydraulic oil, and the oil supply line is connected to a gas-hydraulic booster device.

[0021] Secondly, according to an embodiment of the present invention, a clamping device described above is applied.

[0022] A clamp according to an embodiment of the present invention has at least the following beneficial effects: by adjusting the position of the adjusting member within the working cavity to change the gap between the clamping end of the clamping member and the object to be clamped, it has high flexibility and adaptability, can meet the clamping requirements of guide rails of different sizes, and improves the versatility of the clamp. The specific working principle is as follows: when the working medium continuously enters and fills the drive cavity, the working medium pushes the drive end of the clamping member to move, thereby causing the clamping end to move towards the object to be clamped, gradually reducing the gap between the clamping end and the object until the clamping member clamps and fixes the object. When the object is finished being processed, the working medium is discharged. At this time, the drive end resets and drives the clamping end away from the object. When the clamping end is disengaged from the object, the object is in a released state, while the drive end continues to approach the adjusting member and eventually abuts against the adjusting member. The gap between the clamping end of the clamping member and the object to be clamped can be adjusted by adjusting the position of the adjusting member within the working cavity, thereby meeting the fixing requirements of workpieces of different sizes and improving the versatility of the clamp. Understandably, if the size of the object to be clamped is larger than the distance between the two clamping ends, the user can increase the distance between the two clamping ends by adjusting the position of the adjusting element within the working cavity to accommodate the object of the current size. That is, when the size of the object to be clamped changes, the clamping device can be easily adjusted to adapt to different sizes by adjusting the position of the adjusting element, improving the versatility and flexibility of the clamping device. It eliminates the need to replace the entire clamping device or clamping element; simply adjusting the position of the adjusting element is sufficient to accommodate different sizes of objects. Adjusting the gap to adapt to different sizes avoids the need for frequent replacements of the clamping device or clamping element, thereby reducing production and maintenance costs. Furthermore, it allows for precise control of the gap between the clamping end and the object to be clamped, which is particularly important for applications requiring strict control of clamping force or gap, such as precision manufacturing and automated assembly. In addition, an appropriate gap ensures that the clamping force is evenly distributed when applied, preventing excessive local stress that could damage the object or result in poor clamping performance. Adjusting the gap optimizes the clamping effect and improves the stability and reliability of the clamping process. In some cases, excessive clamping can damage the surface of the object being clamped. Adjusting the gap can reduce the pressure of the clamping end on the object, thus protecting the object's surface from damage.

[0023] It should be noted that the working medium can be hydraulic oil or other media. This application does not specifically limit the type of working medium, and users can choose according to the actual situation.

[0024] The clamp of this application has a compact structure and small size, allowing for installation and use even in situations with limited space. Furthermore, its simple structure and low manufacturing cost reduce production costs. Simultaneously, the clamp of this application provides strong holding force, stable clamping, and high rigidity, ensuring that the machining process requires strong holding force and meeting the user's machining needs.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 is a cross-sectional view of a clamping device according to an embodiment of the present invention;

[0028] Figure 2 is an enlarged view of the figure marked A in Figure 1;

[0029] Figure 3 is an exploded view of a clamping device according to an embodiment of the present invention;

[0030] Figure 4 is a structural diagram of the adjusting member and clamping member according to an embodiment of the present invention;

[0031] Figure 5 is a perspective view of a clamping device according to an embodiment of the present invention;

[0032] Figure 6 is an isometric view of a clamping device according to an embodiment of the present invention;

[0033] Figure 7 is an exploded view of an embodiment of the present invention in which the piston rod is disposed on the oil supply line;

[0034] Figure 8 is a structural diagram of an embodiment of the present invention with multiple clamping elements.

[0035] Explanation of reference numerals in the attached drawings: Workpiece 1; Seat 100; Working chamber 110; Drive chamber 120; Oil supply passage 130; Clamping chamber 140; Clamping element 200; Drive end 210; Clamping end 220; Adjusting element 300; Outer ring groove 310; Boss 320; First groove 330; Connecting hole 340; Positioning ring groove 400; Sealing ring 410; Sealing ring 420; Piston rod 500. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0038] In the description of the invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. If the terms "first" and "second" are used, they are only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0040] Referring to Figures 1 to 6, an embodiment of the present invention provides a clamping device.

[0041] Specifically, as shown in the figure, the clamping device includes a base 100 with a working cavity 110; a clamping member 200, including a drive end 210 and a clamping end 220 connected to each other, the drive end 210 being located inside the working cavity 110, and the clamping end 220 being used to abut and fix the object to be clamped; and an adjusting member 300, installed in the working cavity 110. The adjusting member 300, the drive end 210, and the working cavity 110 cooperate to form a drive cavity 120, which is used to contain a working medium. The working medium is used to push the drive end 210 to move so that the clamping end 220 abuts the object to be clamped. When the working medium is discharged from the drive cavity 120, the drive end 210 can abut the adjusting member 300 to release the object to be clamped. In the working cavity 110, the adjusting member 300 can be adjusted in position to change the gap between the clamping end 220 and the object to be clamped in the released state.

[0042] The seat 100 has a clamping cavity 140, and a clamping member 200 is provided on the side wall of the clamping cavity 140.

[0043] The position of the adjusting member 300 within the working cavity 110 alters the gap between the clamping end 220 of the clamping member 200 and the object to be clamped, providing high flexibility and adaptability. This allows for clamping of guide rails of different sizes, improving the versatility of the clamper. The specific working principle is as follows: as the working medium continuously enters and fills the drive cavity 120, it pushes the drive end 210 of the clamping member 200 to move, causing the clamping end 220 to move towards the object to be clamped. This gradually reduces the gap between the clamping end 220 and the object until the clamping member 200 clamps and secures the object. After the object is processed, the working medium is discharged. At this point, the drive end 210 resets and moves the clamping end 220 away from the object. Once the clamping end 220 disengages from the object, the object is released, while the drive end 210 continues to approach the adjusting member 300 and eventually abuts against it. The adjustable adjustment element 300, positioned within the working cavity 110, adjusts the gap between the clamping end 220 of the clamping element 200 and the object to be clamped. This allows for the fixing of workpieces 1 of different sizes, improving the versatility of the clamp. Understandably, if the size of the object to be clamped is larger than the distance between the two clamping ends, the user can adjust the position of the adjustable element 300 within the working cavity 110 to increase the distance between the two clamping ends, thus ensuring the object of that size is properly clamped. In other words, when the size of the object to be clamped changes, the clamping device can be easily adjusted to accommodate different sizes by adjusting the position of the adjustable element 300. This improves the versatility and flexibility of the clamping device. It eliminates the need to replace the entire clamping device or clamping element 200; simply adjusting the position of the adjustable element 300 is sufficient to accommodate different sizes. By adjusting the gap, the need for frequent replacements of the clamping device or clamping element 200 is avoided, thereby reducing production and maintenance costs. Furthermore, the gap between the clamping end 220 and the object to be clamped can be precisely controlled, which is especially important for applications requiring strict control of clamping force or gap, such as precision manufacturing and automated assembly. In addition, an appropriate gap ensures that the clamping force is evenly distributed when applied by the clamping end 220, avoiding excessive local stress that could damage the object or result in poor clamping performance. By adjusting the gap, the clamping effect can be optimized, improving clamping stability and reliability. In some cases, excessive clamping may damage the surface of the object to be clamped. Adjusting the gap reduces the pressure of the clamping end 220 on the object, thereby protecting the object's surface from damage.

[0044] According to some embodiments of this application, as shown in the figures, this application provides a first embodiment regarding the adjustment member 300. Specifically, the adjustment member 300 includes an outer annular groove 310, which is located on the side of the adjustment member 300 near the drive end 210. The outer annular groove 310 opens toward the drive end 210 and is used to form a drive cavity 120.

[0045] Alternatively, the adjusting member 300 includes a boss 320 located on the side of the adjusting member 300 near the driving end 210. The adjusting member 300 abuts against the driving end 210 through the top of the boss 320. The gap between the boss 320 and the inner wall of the working cavity 110 forms the driving cavity 120.

[0046] According to some embodiments of this application, as shown in the figures, this application provides a second embodiment regarding the adjusting member 300. Specifically, the adjusting member 300 has a first groove 330 located on the side of the adjusting member 300 near the drive end 210. The first groove 330 is used to form a drive cavity 120. Further, the bottom of the first groove 330 is provided with a connecting hole 340, which communicates with the working cavity 110. The connecting hole 340 can serve as an oil supply passage 130, through which hydraulic oil can be input to the working cavity 110 to push the clamping member 200 to move.

[0047] According to some embodiments of this application, the seat 100 has an oil supply passage 130 for providing hydraulic oil, and the adjusting member 300 has a gas-hydraulic booster device. Specifically, as shown in FIG1, the adjusting member 300 is provided with a connecting hole 340, and the adjusting member 300 is provided with a piston rod 500, one end of which is connected to the connecting hole 340. The specific working principle is as follows: The user pre-inputs a certain amount of hydraulic oil into the drive chamber 120. When the piston rod 500 starts to move, it squeezes the hydraulic oil in the drive chamber 120. Since the space of the drive chamber 120 is small, the piston rod pushes the hydraulic oil in the drive chamber 120. The hydraulic oil in the drive chamber 120 is squeezed. The area ratio of the two pistons (i.e., the piston rod 500 and the clamping member 200 of this application) generates a pressure ratio (pressure increase ratio). (Pressure ratio * gas drive pressure = output pressure) to achieve the function of gas-liquid conversion and increase hydraulic pressure. The high-pressure hydraulic oil pushes the clamping member 200 to produce displacement, thereby clamping the workpiece 1. When the air pressure direction is switched, the piston rod 500 retracts, the hydraulic pressure drops, and the clamping member 200 is reset under the rebound action of the elastic element, thereby releasing the clamping of the workpiece 1.

[0048] Alternatively, the base 100 may have an oil supply circuit 130 for supplying hydraulic oil. Optionally, when an air-hydraulic booster device is provided on the oil supply circuit 130, a pneumatic hydraulic pump can be installed outside the clamping device to supply high-pressure hydraulic oil to the clamping device, providing a higher output pressure to the clamping device, thereby increasing the clamping force of the clamping device, meeting the requirements for large clamping force, ensuring stable clamping of the object, and guaranteeing the processing accuracy of the object.

[0049] Alternatively, the seat 100 may have an oil supply passage 130 for supplying hydraulic oil. Optionally, as shown in FIG7, a piston rod 500 may be provided on the oil supply passage 130. Specifically, the user pre-inputs a certain amount of hydraulic oil and then places the piston rod 500 on the oil supply passage 130. An external pneumatic device generates power to the piston rod 500. When the piston rod 500 moves within the oil supply passage 130, it pushes the hydraulic oil, which is compressed. The area ratio of the two pistons (i.e., the piston rod and clamping member 200 of this application) generates a pressure ratio (pressure increase ratio), (pressure ratio * gas drive pressure = output pressure), achieving the function of gas-liquid conversion and increasing hydraulic pressure. The high-pressure hydraulic oil pushes the clamping member 200 to produce displacement, thereby clamping the workpiece 1. When the pneumatic pressure direction is switched, the piston rod retracts, the hydraulic pressure drops, and the clamping member 200 is reset under the rebound action of the elastic member, thereby releasing the clamping of the workpiece 1. It should be noted that when the seat 100 is provided with an oil supply circuit 130, the adjusting member 300 is not provided with a connecting hole 340, or the connecting hole 340 of the adjusting member is blocked by a plug.

[0050] Understandably, by utilizing gas-liquid conversion to provide high-pressure hydraulic oil to the clamping device, a higher output pressure can be provided to the clamping device, thereby increasing the clamping force of the clamping device, meeting the requirements for large clamping force, ensuring the stability of object clamping, and guaranteeing the processing accuracy of the object.

[0051] According to some embodiments of this application, the adjusting member 300 and / or the driving end 210 are provided with a positioning ring groove 400. The positioning ring groove 400 is fitted with a sealing ring 410 and a sealing ring 420. The sealing ring 410 and the sealing ring 420 are used to abut against the cavity wall of the working cavity 110 to seal, so as to ensure the sealing of the working medium and avoid leakage or seepage of the working medium when repeatedly clamping or clamping objects for a long time, thereby affecting the stability of the clamping force of the clamp and avoiding affecting the processing accuracy of the object.

[0052] According to some embodiments of this application, the working cavity 110 is provided with an elastic element, which is located on the side of the drive end 210 away from the adjustment element 300. The elastic element is used to drive the drive end 210 to approach and abut against the adjustment element 300.

[0053] Understandably, when the working medium is discharged from the drive cavity 120, the pressure inside the drive cavity 120 decreases. Under the elastic recovery action of the elastic element, the elastic element pushes the clamping element 200 to reset, causing the drive end 210 to gradually approach the adjusting element 300, and finally the drive end 210 to abut against the adjusting element 300. When the drive end 210 is fully abutted against the adjusting element 300, the clamping element 200 stops moving. At this time, the clamping end 220 has been released from the object, and the object can be removed.

[0054] It should be noted that this application does not specifically limit the type of elastic element; the elastic element can be a component with deformation recovery capability, such as a spring.

[0055] According to some embodiments of this application, the number of clamping members 200 and adjusting members 300 is several pairs, and a pair of clamping members 200 clamps the object to be clamped.

[0056] Understandably, the number of clamping elements 200 and adjusting elements 300 can be adjusted according to the actual length of the object. As shown in the figure, clamping elements 200 are located on both sides of the object, and two clamping elements 200 form a pair to jointly clamp and fix the object. As shown in Figure 8, when the user has certain requirements for the clamping force of the object, the number of clamping elements 200 can be increased to improve the clamping force on the object, ensure the clamping stability of the object, ensure processing accuracy, and meet the user's needs.

[0057] It should be noted that the working medium can be hydraulic oil or other media. This application does not specifically limit the type of working medium, and users can choose according to actual conditions. Preferably, the working medium is hydraulic oil.

[0058] This application also provides a clamping device that uses the above-described clamping device.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. Clamping device, characterized in that include: The base has a working cavity; A clamping element includes a drive end and a clamping end connected to each other. The drive end is located inside the working cavity, and the clamping end is used to abut against and fix the object to be clamped. An adjusting member is installed in the working cavity. The adjusting member, the driving end, and the working cavity cooperate to form a driving cavity. The driving cavity is used to contain a working medium. The working medium is used to push the driving end to move so that the clamping end abuts against the object to be clamped. When the working medium is discharged from the driving cavity, the driving end can abut against the adjusting member to release the object to be clamped. In the working chamber, the adjusting member can be positioned to change the gap between the clamping end and the object to be clamped in the released state.

2. The clamping device of claim 1, wherein The adjusting member includes an outer ring groove, which is located on the side of the adjusting member near the driving end and is open toward the driving end. The outer ring groove is used to form the driving cavity. And / or, the adjusting member includes a boss located on the side of the adjusting member near the driving end, the adjusting member abutting against the driving end through the top of the boss, and the gap around the boss is used to form the driving cavity.

3. The clamping device of claim 1, wherein The adjusting member has a first groove located on the side of the adjusting member near the driving end. The first groove is used to form the driving cavity. The adjusting member has a gas-liquid booster device with a connecting hole that communicates with the driving cavity. The connecting hole is located at the bottom of the first groove.

4. The clamping device of claim 1, wherein The adjusting component and / or the driving end are provided with a positioning ring groove, and a sealing ring and a sealing ring are fitted into the positioning ring groove. The sealing ring and the sealing ring are used to abut against the cavity wall of the working cavity to seal it.

5. The clamping device of claim 1, wherein The working cavity is provided with an elastic element, which is located on the side of the drive end away from the adjustment element. The elastic element is used to drive the drive end to approach and abut against the adjustment element.

6. The clamping device of claim 1, wherein The working medium is hydraulic oil, and the adjusting component has an oil supply circuit for supplying the hydraulic oil, the oil supply circuit being connected to a gas-liquid booster device.

7. The clamping device of claim 1, wherein The number of clamping members and adjusting members is several pairs, and one pair of clamping members clamps the object to be clamped.

8. The clamping device of claim 7, wherein The seat has a clamping cavity, and the clamping element is provided on the side wall of the clamping cavity.

9. The clamping device of claim 1, wherein The working medium is hydraulic oil, and the seat has an oil supply circuit for supplying the hydraulic oil, and the oil supply circuit is connected to a gas-liquid booster device.

10. A clamp, characterized in that Includes the clamping device as described in any one of claims 1 to 9.

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