A compression device

Abstract

The application belongs to the technical field of workpiece pressing, and discloses a pressing device which comprises a support plate, a pull rod, a pressing plate and a driving mechanism, the pull rod is arranged in the support plate, the pull rod has a tensioned end and a connecting end, the tensioned end and the connecting end are respectively located on opposite sides of the support plate, the pressing plate and the connecting end are located on the same side of the support plate, and the connecting end is connected to the middle part of the length direction of the pressing plate, so that the distance between the two ends of the pressing plate and the support plate forms a pressing position, the driving mechanism is connected to the tensioned end and is used for driving the pull rod to slide relative to the support plate, so that the distance between the pressing plate and the support plate changes, thereby the same pressing plate can fix at least two workpieces, compared with the prior art which can only fix one workpiece at a time, the number of workpieces fixed at a time is increased, the start-stop frequency of the machining equipment is reduced, the machining efficiency of the workpieces is improved, the energy consumption of the machining equipment is reduced, and the machining cost of the workpieces is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of workpiece clamping, specifically relating to a clamping device. Background Technology

[0002] Machining is a manufacturing process that uses mechanical equipment to cut, shape, or perform special processing on workpieces to obtain the desired shape, size, and surface quality. It is a core technology of modern manufacturing. Cutting processes refer to the machining processes that remove material using cutting tools, and mainly include turning, milling, drilling, grinding, and other cutting processes.

[0003] Currently, during the cutting process, pressure plates are generally used to hold the workpiece in place, or vises are used to clamp it. However, since pressure plates and vises can only hold one workpiece at a time, the processing equipment needs to be frequently started and stopped so that workers can remove the finished workpiece from the equipment and then fix the unprocessed workpiece back on. This results in low processing efficiency. At the same time, since the starting current of the processing equipment can reach 5-7 times the rated current, the frequent start-ups and stops of the processing equipment will increase the energy consumption of the equipment, thereby increasing the processing cost of the workpiece. Utility Model Content

[0004] This application provides a clamping device to improve the processing efficiency of workpieces and reduce the processing cost of workpieces.

[0005] The technical solution adopted in this application is as follows:

[0006] A clamping device, comprising:

[0007] Support plate;

[0008] A tie rod, which passes through the support plate, has a tension end and a connecting end, and the tension end and the connecting end are respectively located on opposite sides of the support plate;

[0009] A pressure plate, wherein the pressure plate and the connecting end are located on the same side of the support plate, and the connecting end is connected to the middle part of the pressure plate in the length direction, so that both ends of the pressure plate form a pressing position with the support plate;

[0010] A driving mechanism is connected to the tension end and is used to drive the pull rod to slide relative to the support plate, so as to change the distance between the pressure plate and the support plate.

[0011] By adopting the above technical solution, when using the clamping device in this application to fix the workpiece, the clamping device is first installed on the processing equipment, then the workpiece is placed in the clamping position, and then the drive mechanism is started, which drives the pull rod. The pull rod slides relative to the support plate, so that the pull rod drives the pressure plate to move. The pressure plate moves towards the direction of the support plate, and finally the pressure plate abuts against the workpiece placed in the clamping position. At the same time, the pressure plate applies pressure to the workpiece in the direction of the support plate, so as to fix the workpiece in the clamping position, that is, to achieve the fixation of the workpiece.

[0012] Because the connecting end of the tie rod is connected to the middle of the pressure plate along its length, workpieces can be placed between both ends of the pressure plate and the support plate, thus forming a clamping position between both ends of the pressure plate and the support plate. This allows the same pressure plate to fix at least two workpieces. Compared to the existing technology where only one workpiece can be fixed at a time, this increases the number of workpieces that can be fixed at a time, reduces the start-up and shutdown frequency of the processing equipment, improves the processing efficiency of the workpieces, and reduces the energy consumption of the processing equipment, thereby reducing the processing cost of the workpieces.

[0013] Optionally, the clamping device further includes a connecting arm, both ends of which are connected to the pull rods, and the connecting end of each pull rod is connected to the pressure plate. The driving mechanism is connected to the connecting arm and located at the middle of the connecting arm in the length direction.

[0014] By adopting the above technical solution, both ends of the connecting arm are connected to pull rods, and both ends of each pull rod are connected to pressure plates. The drive mechanism is connected to the connecting arm and located in the middle of the connecting arm's length direction. This allows the same drive mechanism to simultaneously drive at least two pull rods, reducing the number of drive mechanisms required and thus lowering the production cost of the clamping device. On the other hand, it increases the number of clamping positions of the clamping device, further increasing the number of workpieces fixed at one time, further reducing the start-up and shutdown frequency of the processing equipment, and thus further improving the processing efficiency of the workpiece and further reducing the processing cost of the workpiece.

[0015] Optionally, the connecting arm is located on the side of the drive mechanism, and connecting arms are provided on both opposite sides of the drive mechanism.

[0016] By adopting the above technical solution, since the connecting arm is located on the side of the drive mechanism and connecting arms are provided on both sides of the drive mechanism, on the one hand, the same drive mechanism can drive at least four pull rods to move simultaneously, thereby further reducing the number of drive mechanisms and thus further reducing the production cost of the clamping device. On the other hand, it can further increase the number of clamping positions of the clamping device, thereby further increasing the number of workpieces fixed at one time, further reducing the start-up and shutdown frequency of the processing equipment, and thus further improving the processing efficiency of the workpiece and further reducing the processing cost of the workpiece. Furthermore, it can ensure the force balance of the drive mechanism, thereby extending the service life of the drive mechanism and reducing the failure rate of the drive mechanism.

[0017] Optionally, the connecting end is hinged to the pressure plate;

[0018] And / or, the connecting arm is hinged to the drive mechanism, and the pull rod is hinged to the connecting arm.

[0019] By adopting the above technical solution, since the connecting end is hinged to the pressure plate, when workpieces of different thicknesses are placed at both ends of the pressure plate, the pressure plate can adjust itself according to the thickness of the workpiece so that both ends of the pressure plate can abut against the corresponding workpiece. This increases the flexibility of the clamping device, ensures the clamping device's fixing effect on the workpiece, and balances the force on the pull rod and drive mechanism, thereby extending the service life of the clamping device and reducing its failure rate.

[0020] Since the connecting arm is hinged to the drive mechanism and the pull rod is hinged to the connecting arm, when workpieces of different thicknesses are placed at the ends of each pressure plate, the connecting arm can adjust itself according to the thickness of the workpiece so that both ends of the pressure plate can abut against the corresponding workpiece. This increases the flexibility of the clamping device, ensures the clamping device's fixation effect on the workpiece, and balances the force on the drive mechanism, thereby extending the service life of the drive mechanism and reducing its failure rate.

[0021] Optionally, the driving mechanism includes a cylinder, a driving rod passing through the cylinder, and a piston disposed on the driving rod and located inside the cylinder. One end of the driving rod located outside the cylinder is connected to the pull rod. The cylinder has a liquid chamber and a gas chamber inside. The liquid chamber is located on the side of the piston near the pressure plate, and the gas chamber is located on the side of the piston away from the pressure plate. The cylinder is provided with a liquid inlet communicating with the liquid chamber and an air inlet communicating with the gas chamber.

[0022] By adopting the above technical solution, after the workpiece is placed in the clamping position, liquid is supplied to the cylinder through the liquid inlet, allowing the liquid to enter the liquid chamber. The liquid in the liquid chamber then applies pressure to the piston away from the pressure plate, causing the piston to drive the drive rod to move away from the pressure plate. This causes the drive rod to drive the connecting arm, pull rod, and pressure plate, gradually reducing the distance between the pressure plate and the support plate. Ultimately, the pressure plate comes into contact with the workpiece and applies pressure to the workpiece in the direction of the support plate, thus fixing the workpiece. After the workpiece is processed, high-pressure gas is supplied to the cylinder through the air inlet, allowing the high-pressure gas to enter the gas chamber. This high-pressure gas in the gas chamber applies pressure to the piston in the direction of the pressure plate, causing the piston to drive the drive rod in the direction of the pressure plate. Simultaneously, the liquid in the liquid chamber is gradually discharged through the liquid inlet, causing the drive rod to drive the connecting arm, pull rod, and pressure plate. This gradually increases the distance between the pressure plate and the support plate, ultimately separating the pressure plate from the workpiece. The workpiece can then be removed from the clamping position.

[0023] By using liquid to enter the liquid chamber, the pressure plate is driven towards the direction of the support plate, thereby ensuring that the pressure plate can apply pressure to the workpiece and thus ensuring the fixation effect of the workpiece; by using high-pressure gas to enter the gas chamber, the pressure plate is driven away from the support plate, thereby reducing the risk of liquid leakage in the drive mechanism to a certain extent and thus improving the cleanliness of the drive mechanism to a certain extent.

[0024] Optionally, the cylinder body includes a base plate, a cylinder barrel disposed on the base plate, and a through cover disposed on the cylinder barrel. The drive rod passes through the through cover, the liquid inlet is disposed on the through cover, the air inlet is disposed on the base plate, the base plate is fixedly connected to the support plate, and the cylinder barrel is located between the base plate and the support plate.

[0025] By adopting the above technical solution, since the base plate is fixedly connected to the support plate and the cylinder is located between the base plate and the support plate, the drive mechanism is fixed, thereby increasing the stability of the drive mechanism. At the same time, the base plate can not only serve as a part of the structure of the cylinder, but also serve to fix the drive mechanism to the support plate, thus avoiding the need to set up a separate component to fix the drive mechanism, thereby reducing the size of the drive mechanism and the volume of the clamping device. This reduces the risk that the clamping device may interfere with the stroke of the processing equipment, and ensures that the processing equipment can process the workpiece installed on the clamping device normally.

[0026] Optionally, the base plate is provided with a positioning cavity, and at least a portion of the cylinder extends into the positioning cavity.

[0027] By adopting the above technical solution, since the base plate is provided with a positioning cavity, at least part of the cylinder extends into the positioning cavity. This allows for two advantages: firstly, the cylinder can be positioned by utilizing the cooperation between the cylinder and the positioning cavity, thereby increasing the connection stability between the cylinder and the base plate; secondly, the cooperation between the cylinder and the positioning cavity can increase the sealing between the cylinder and the base plate, ensuring the driving efficiency of the pressure plate using high-pressure gas, while avoiding noise caused by possible air leakage between the base plate and the cylinder; and thirdly, while ensuring the internal volume of the cylinder, the size of the drive mechanism can be reduced, further reducing the risk of the clamping device interfering with the stroke of the processing equipment, thus further ensuring that the processing equipment can properly process the workpiece installed on the clamping device.

[0028] Optionally, the clamping device further includes an air storage tank and a liquid storage tank, wherein the air storage tank is connected to the air inlet and the liquid storage tank, and the liquid storage tank is connected to the liquid inlet.

[0029] By adopting the above technical solution, when the pressure plate is driven towards the direction of the support plate, the high-pressure gas in the gas storage tank enters the liquid storage tank. As more and more high-pressure gas enters the liquid storage tank, the pressure on the liquid in the liquid storage tank increases, so that the liquid in the liquid storage tank enters the liquid chamber through the liquid inlet under the pressure of the high-pressure gas. This causes the piston to drive the drive rod to move away from the pressure plate. The drive rod drives the pressure plate to move through the connecting arm and the pull rod, so that the pressure plate moves towards the direction of the support plate.

[0030] When the pressure plate is driven in a direction away from the support plate, the high-pressure gas in the gas tank enters the gas chamber through the air inlet. As more and more high-pressure gas enters the gas chamber, the piston, under the pressure of the high-pressure gas, drives the drive rod to move towards the support plate. The drive rod drives the pressure plate to move through the connecting arm and the pull rod, so that the pressure plate moves away from the support plate. At the same time, the liquid in the liquid chamber returns to the liquid tank under the action of the piston.

[0031] In summary, the drive mechanism in this application uses high-pressure gas in the gas storage tank to pressurize the liquid in the liquid storage tank, so that the liquid in the liquid storage tank enters the liquid-containing chamber through the liquid inlet, thereby realizing pneumatic pressurization. Compared with the prior art, which uses a motor and pump to provide power to the liquid in the liquid storage tank, this reduces the energy consumption of the drive mechanism, reduces the noise of the drive mechanism, and reduces the operating cost of the drive mechanism, while increasing the cleanliness of the pressing device.

[0032] Optionally, the pressing device further includes a pressure cylinder and a pressure cylinder. The pressure cylinder is connected to the liquid storage tank, and the pressure cylinder is connected to the air storage tank. The piston rod of the pressure cylinder has an extended position and a retracted position. When the piston rod is in the extended position, the piston rod extends into the pressure cylinder.

[0033] By adopting the above technical solution, when the pressure plate is driven towards the direction of the support plate, the high-pressure gas in the gas storage tank enters the liquid storage tank, so that the pressure on the liquid in the liquid storage tank gradually increases. Then, the liquid in the liquid storage tank enters the pressure boosting cylinder under the action of the high-pressure gas. At the same time, the piston rod of the pressure boosting cylinder moves towards the retracted position under the action of the liquid in the pressure boosting cylinder, so that more liquid can enter the pressure boosting cylinder. Subsequently, the high-pressure gas in the gas storage tank enters one of the chambers of the pressure boosting cylinder, so that the piston rod of the pressure boosting cylinder moves towards the extended position, thereby extending the piston rod of the pressure boosting cylinder into the pressure boosting cylinder, so that the piston rod of the pressure boosting cylinder continues to pressurize the liquid in the pressure boosting cylinder. This realizes the use of the pressure boosting cylinder to further pressurize the liquid, thereby increasing the pressure that the pressure plate can apply to the workpiece, and further increasing the fixing stability of the pressure plate on the workpiece.

[0034] When the pressure plate is driven in the direction away from the support plate, the high-pressure gas in the gas tank enters the gas chamber through the air inlet, so that the piston is pushed by the high-pressure gas. Then the piston drives the drive rod to move, the volume of the gas chamber gradually increases, the volume of the liquid chamber gradually decreases, and the liquid in the liquid chamber gradually returns to the liquid tank through the liquid inlet under the action of the piston. The piston rod of the booster cylinder moves towards the retracted position under the action of the liquid.

[0035] Optionally, the clamping device further includes a first two-position five-way valve and a second two-position five-way valve connected to the air storage tank. The two ends of the first two-position five-way valve are respectively connected to the air inlet and the liquid storage tank, and the two ends of the second two-position five-way valve are respectively connected to the two chambers of the booster cylinder.

[0036] By adopting the above technical solution, when the piston is driven in a direction away from the support plate, the high-pressure gas in the gas storage tank enters the liquid storage tank through the first two-position five-way valve, so that the liquid in the liquid storage tank enters the pressure boosting cylinder. The high-pressure gas in the gas storage tank enters the pressure boosting cylinder through the second two-position five-way valve, so that the piston rod of the pressure boosting cylinder moves towards the extension position and extends into the pressure boosting cylinder, thereby realizing the pressurization of the liquid by the piston rod of the pressure boosting cylinder.

[0037] When the piston is driven toward the direction of the support plate, the high-pressure gas in the gas tank enters the gas chamber through the inlet of the first and second position five-way valves, so that the piston moves toward the direction of the support plate under the action of the high-pressure gas.

[0038] By setting up a first two-position five-way valve and a second two-position five-way valve, on the one hand, the number of valve bodies can be reduced, thereby lowering the manufacturing cost of the pressing device. On the other hand, it enables the gas storage tank to be connected to the air inlet through the first two-position five-way valve, while the liquid storage tank is connected to the outside through the first two-position five-way valve; and when the gas storage tank is connected to one chamber of the booster cylinder through the second two-position five-way valve, the other chamber of the booster cylinder is connected to the outside through the second two-position five-way valve, thereby reducing the control difficulty of the pressing device.

[0039] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0040] 1. The clamping device in this application includes a support plate, a pull rod, a pressure plate, and a drive mechanism. The pull rod passes through the support plate and has a tension end and a connecting end. The tension end and the connecting end are located on opposite sides of the support plate, respectively. The pressure plate and the connecting end are located on the same side of the support plate, and the connecting end is connected to the middle of the pressure plate along its length, so that both ends of the pressure plate and the support plate form clamping positions. The drive mechanism is connected to the tension end and is used to drive the pull rod to slide relative to the support plate, so that the distance between the pressure plate and the support plate changes. This allows the same pressure plate to fix at least two workpieces. Compared with the prior art, which can only fix one workpiece at a time, this increases the number of workpieces that can be fixed at a time, reduces the start-up and shutdown frequency of the processing equipment, improves the processing efficiency of the workpieces, and reduces the energy consumption of the processing equipment, thereby reducing the processing cost of the workpieces.

[0041] 2. The clamping device in this application also includes a connecting arm, with pull rods connected to both ends of the connecting arm. Each pull rod has a pressure plate connected to its connecting end. The drive mechanism is connected to the connecting arm and located in the middle of the connecting arm's length direction. This allows the same drive mechanism to simultaneously drive at least two pull rods, reducing the number of drive mechanisms required and thus lowering the production cost of the clamping device. On the other hand, it increases the number of clamping positions of the clamping device, further increasing the number of workpieces fixed at one time, further reducing the start-up and shutdown frequency of the processing equipment, thereby further improving the processing efficiency of the workpiece and further reducing the processing cost of the workpiece.

[0042] 3. The connecting arm in this application is located on the side of the drive mechanism, and connecting arms are provided on both sides of the drive mechanism. This allows the same drive mechanism to drive at least four levers simultaneously, thereby reducing the number of drive mechanisms required and further reducing the production cost of the clamping device. On the other hand, it increases the number of clamping positions of the clamping device, thereby increasing the number of workpieces that can be fixed at one time, further reducing the start-up and shutdown frequency of the processing equipment, and further improving the processing efficiency and reducing the processing cost of the workpieces. Furthermore, it ensures the force balance of the drive mechanism, thereby extending the service life of the drive mechanism and reducing the failure rate of the drive mechanism. Attached Figure Description

[0043] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0044] Figure 1 This is a partial structural cross-sectional view of the clamping device described in one embodiment of this application;

[0045] Figure 2 This is a partial structural cross-sectional view of the clamping device described in one embodiment of this application from another perspective;

[0046] Figure 3 This is a simplified structural diagram of a clamping device according to one embodiment of this application.

[0047] Figure label:

[0048] 1. Support plate; 11. Fixing plate; 2. Tie rod; 3. Pressure plate; 4. Drive mechanism; 41. Cylinder body; 411. Base plate; 412. Cylinder barrel; 413. Through cover; 414. Liquid chamber; 415. Gas chamber; 416. Liquid inlet; 417. Air inlet; 42. Drive rod; 43. Piston; 5. Connecting arm; 6. Gas tank; 61. First and second position five-way valve; 62. Second and second position five-way valve; 7. Liquid tank; 8. Pressure booster cylinder; 9. Pressure booster cylinder; 10. Workpiece. Detailed Implementation

[0049] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0050] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0051] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0052] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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 can be combined in any suitable manner in one or more embodiments or examples.

[0054] Reference Figures 1 to 3 A clamping device is disclosed, comprising a support plate 1, a pull rod 2, a pressure plate 3, and a drive mechanism 4. The pull rod 2 passes through the support plate 1 and has a tension end and a connecting end, which are located on opposite sides of the support plate 1, respectively. The pressure plate 3 and the connecting end are located on the same side of the support plate 1, and the connecting end is connected to the middle part of the pressure plate 3 in the length direction, so that both ends of the pressure plate 3 form a clamping position with the support plate 1. The drive mechanism 4 is connected to the tension end and is used to drive the pull rod 2 to slide relative to the support plate 1, so that the distance between the pressure plate 3 and the support plate 1 changes.

[0055] It should be noted that the phrase "the connecting end is connected to the middle part of the length direction of the pressure plate 3" means that the connection position of the connecting end to the pressure plate 3 is a certain distance from both ends of the pressure plate 3 in the length direction.

[0056] When using the clamping device of this application to fix the workpiece 10, first install the clamping device on the processing equipment, then place the workpiece 10 in the clamping position, and then start the drive mechanism 4, which in turn drives the pull rod 2. The pull rod 2 slides relative to the support plate 1, so that the pull rod 2 drives the pressure plate 3 to move. The pressure plate 3 moves toward the direction of the support plate 1, and finally the pressure plate 3 abuts against the workpiece 10 placed in the clamping position. At the same time, the pressure plate 3 applies pressure to the workpiece 10 toward the direction of the support plate 1, so as to fix the workpiece 10 in the clamping position, that is, to fix the workpiece 10.

[0057] Since the connecting end of the pull rod 2 is connected to the middle of the pressure plate 3 along its length, both ends of the pressure plate 3 and the support plate 1 can be used to place workpieces 10, thus forming a clamping position between both ends of the pressure plate 3 and the support plate 1. This allows the same pressure plate 3 to fix at least two workpieces 10. Compared with the existing technology where only one workpiece 10 can be fixed at a time, this increases the number of workpieces 10 that can be fixed at a time, reduces the start-up and shutdown frequency of the processing equipment, improves the processing efficiency of the workpieces 10, and reduces the energy consumption of the processing equipment, thereby reducing the processing cost of the workpieces 10.

[0058] This application does not specify the connection position between the connecting end and the pressure plate 3. Preferably, refer to... Figure 1 The connecting end is connected to the middle position along the length of the pressure plate 3 to ensure the force balance at both ends of the pressure plate 3. Of course, in other embodiments, the connecting end can also be connected to one side of the middle position along the length of the pressure plate 3, that is, the distance from the connection position of the connecting end to the pressure plate 3 to one end of the pressure plate 3 is less than the distance from the connection position of the connecting end to the pressure plate 3 to the other end of the pressure plate 3.

[0059] This application does not specify the connection method between the connecting end and the pressure plate 3. Preferably, the connecting end is hinged to the pressure plate 3.

[0060] It is understandable that the connecting end is connected to the pressure plate 3 via a hinge shaft so that the pressure plate 3 can rotate relative to the pull rod 2.

[0061] Since the connecting end is hinged to the pressure plate 3, when workpieces 10 of different thicknesses are placed at both ends of the pressure plate 3, the pressure plate 3 can adjust itself according to the thickness of the workpiece 10 so that both ends of the pressure plate 3 can abut against the corresponding workpiece 10. This increases the flexibility of the clamping device, ensures the clamping device's fixing effect on the workpiece 10, and balances the forces on the pull rod 2 and the drive mechanism 4, thereby extending the service life of the clamping device and reducing its failure rate.

[0062] In other embodiments, the connecting end may also be fixedly connected to the pressure plate 3.

[0063] This application does not specifically limit the manner in which the tie rod 2 passes through the support plate 1. Preferably, the support plate 1 has a through hole, the central axis of which is perpendicular to the support plate 1. The tie rod 2 passes through the through hole, so that the tie rod 2 passes through the support plate 1 and its outer peripheral surface contacts the wall of the through hole. This allows the tie rod 2 to be guided by the wall of the through hole, thereby increasing the stability of the tie rod 2 when it moves relative to the support plate 1. Of course, in other embodiments, the support plate 1 may also have a hole structure, the central axis of which is not at a 90° angle to the support plate 1.

[0064] This application does not specify the driving method of the drive mechanism 4 to the pull rod 2. Preferably, refer to Figure 1 and Figure 2 The clamping device also includes a connecting arm 5, with pull rods 2 connected to both ends of the connecting arm 5. Each pull rod 2 has a pressure plate 3 connected to its connecting end. The drive mechanism 4 is connected to the connecting arm 5 and is located in the middle of the length direction of the connecting arm 5.

[0065] It is understandable that the drive mechanism 4 is connected to the pull rod 2 via the connecting arm 5.

[0066] It should be noted that the phrase "the drive mechanism 4 is connected to the connecting arm 5 and is located in the middle of the length of the connecting arm 5" means that the connection point between the drive mechanism 4 and the connecting arm 5 is a certain distance from both ends of the connecting arm 5.

[0067] Both ends of the connecting arm 5 are connected to pull rods 2, and both ends of each pull rod 2 are connected to pressure plates 3. The drive mechanism 4 is connected to the connecting arm 5 and located in the middle of the length direction of the connecting arm 5. This allows the same drive mechanism 4 to drive at least two pull rods 2 to move simultaneously, thereby reducing the number of drive mechanisms 4 and thus reducing the production cost of the clamping device. On the other hand, it can increase the number of clamping positions of the clamping device, thereby further increasing the number of workpieces 10 that can be fixed at one time, further reducing the start-up and shutdown frequency of the processing equipment, and thus further improving the processing efficiency of the workpieces 10 and further reducing the processing cost of the workpieces 10.

[0068] This application does not specifically limit the connection position between the drive mechanism 4 and the connecting arm 5. Preferably, the drive mechanism 4 is connected at the middle position along the length of the connecting arm 5 to ensure force balance at both ends of the connecting arm 5. Of course, in other embodiments, the drive mechanism 4 can also be connected to one side of the middle position along the length of the connecting arm 5, that is, the distance from the connection position of the drive mechanism 4 and the connecting arm 5 to one end of the connecting arm 5 is less than the distance from the connection position of the drive mechanism 4 and the connecting arm 5 to the other end of the connecting arm 5.

[0069] This application does not specify the number of connecting rods 2 connected to the same connecting arm 5. Preferably, refer to... Figure 1 Two tie rods 2 are connected to the same connecting arm 5, with the two tie rods 2 located at opposite ends of the connecting arm 5, to reduce the load on the drive mechanism 4 and ensure the stability of the workpiece 10. In other embodiments, the number of tie rods 2 connected to the same connecting arm 5 can be greater than two, that is, multiple tie rods 2 can be arranged sequentially along the length of the connecting arm 5, to further increase the number of workpieces 10 that can be fixed using the same drive mechanism 4.

[0070] This application does not specifically limit the positional relationship between the connecting arm 5 and the drive mechanism 4. Preferably, refer to... Figure 2 The connecting arm 5 is located on the side of the drive mechanism 4, and the drive mechanism 4 is provided with connecting arms 5 on both opposite sides.

[0071] It is understandable that the same drive mechanism 4 is connected to at least two connecting arms 5, each connecting arm 5 is connected to a pull rod 2, and each pull rod 2 is connected to a pressure plate 3.

[0072] Since the connecting arm 5 is located on the side of the drive mechanism 4, and the drive mechanism 4 is provided with connecting arms 5 on both sides, on the one hand, the same drive mechanism 4 can drive at least four pull rods 2 to move at the same time, thereby further reducing the number of drive mechanisms 4 and thus further reducing the production cost of the clamping device. On the other hand, it can further increase the number of clamping positions of the clamping device, thereby further increasing the number of workpieces 10 fixed at one time, further reducing the start-up and shutdown frequency of the processing equipment, thereby further improving the processing efficiency of workpieces 10 and further reducing the processing cost of workpieces 10. Furthermore, it can ensure the force balance of the drive mechanism 4, thereby extending the service life of the drive mechanism 4 and reducing the failure rate of the drive mechanism 4.

[0073] This application does not specify the number of connecting arms 5 connected to the same drive mechanism 4. Preferably, refer to Figure 2 The same drive mechanism 4 is connected to two connecting arms 5, which are located on opposite sides of the drive mechanism 4 to reduce the load on the drive mechanism 4 and thus ensure the stability of the workpiece 10. In other embodiments, the same drive mechanism 4 may also be connected to at least three connecting arms 5, which are located on opposite sides of the drive mechanism 4 to further increase the number of workpieces 10 that the same drive mechanism 4 can fix.

[0074] In other embodiments, the connecting arm 5 is also hinged to the top of the drive mechanism 4.

[0075] This application does not specifically limit the connection method between the connecting arm 5 and the drive mechanism 4, or the connection method between the pull rod 2 and the connecting arm 5. Preferably, refer to Figure 1 and Figure 2 The connecting arm 5 is hinged to the drive mechanism 4, and the pull rod 2 is hinged to the connecting arm 5.

[0076] It is understandable that the connecting arm 5 is also connected to the drive mechanism 4 via a hinge shaft, so that the connecting arm 5 can rotate relative to the drive mechanism 4, and the pull rod 2 is also connected to the connecting arm 5 via a hinge shaft, so that the pull rod 2 can rotate relative to the connecting arm 5.

[0077] Since the connecting arm 5 is hinged to the drive mechanism 4 and the pull rod 2 is hinged to the connecting arm 5, when workpieces 10 of different thicknesses are placed at the ends of each pressure plate 3, the connecting arm 5 can adjust itself according to the thickness of the workpiece 10 so that both ends of the pressure plate 3 can abut against the corresponding workpiece 10. This increases the flexibility of the clamping device, ensures the clamping device's fixing effect on the workpiece 10, and balances the force on the drive mechanism 4, thereby further extending the service life of the drive mechanism 4 and further reducing the failure rate of the drive mechanism 4.

[0078] In other embodiments, the drive mechanism 4 can also be directly connected to the pull rod 2, that is, the number of drive mechanisms 4 is set in a one-to-one correspondence with the pull rod 2, and one drive mechanism 4 can only drive one pull rod 2 to move.

[0079] This application does not impose specific limitations on the drive mechanism 4; preferably, refer to [the following]. Figure 1 and Figure 2 The drive mechanism 4 includes a cylinder 41, a drive rod 42 passing through the cylinder 41, and a piston 43 located inside the cylinder 41 and on the drive rod 42. One end of the drive rod 42 located outside the cylinder 41 is connected to a pull rod 2. The cylinder 41 has a liquid chamber 414 and a gas chamber 415 inside. The liquid chamber 414 is located on the side of the piston 43 close to the pressure plate 3, and the gas chamber 415 is located on the side of the piston 43 away from the pressure plate 3. The cylinder 41 is provided with a liquid inlet 416 communicating with the liquid chamber 414 and an air inlet 417 communicating with the gas chamber 415.

[0080] It is understood that one end of the drive rod 42 is located inside the cylinder 41, and the other end of the drive rod 42 is located outside the cylinder 41. The connecting arm 5 is connected to the end of the drive rod 42 located outside the cylinder 41.

[0081] After the workpiece 10 is placed in the clamping position, liquid is supplied to the cylinder 41 through the liquid inlet 416 so that the liquid enters the liquid chamber 414. Then, the liquid in the liquid chamber 414 applies pressure to the piston 43 away from the pressure plate 3, so that the piston 43 drives the drive rod 42 to move away from the pressure plate 3. The drive rod 42 drives the connecting arm 5, the pull rod 2 and the pressure plate 3 to move, so that the distance between the pressure plate 3 and the support plate 1 gradually decreases. Finally, the pressure plate 3 abuts against the workpiece 10 and applies pressure to the workpiece 10 in the direction of the support plate 1, so as to fix the workpiece 10.

[0082] After the workpiece 10 is processed, high-pressure gas is supplied to the cylinder 41 through the air inlet 417 so that the high-pressure gas enters the gas chamber 415. Then, the high-pressure gas in the gas chamber 415 applies pressure to the piston 43 in the direction of the pressure plate 3, so that the drive rod drives the drive rod 42 to move in the direction of the pressure plate 3. At the same time, the liquid in the liquid chamber 414 is gradually discharged through the liquid inlet 416, so that the drive rod 42 drives the connecting arm 5, the pull rod 2 and the pressure plate 3 to move, thereby gradually increasing the distance between the pressure plate 3 and the support plate 1, and finally separating the pressure plate 3 from the workpiece 10. Then the workpiece 10 can be removed from the clamping position.

[0083] By using liquid to enter the liquid chamber 414, the pressure plate 3 is driven towards the direction of the support plate 1, thereby ensuring that the pressure plate 3 can apply pressure to the workpiece 10, thus ensuring the fixing effect of the workpiece 10; by using high-pressure gas to enter the gas chamber 415, the pressure plate 3 is driven towards the direction away from the support plate 1, thereby reducing the risk of leakage of the drive mechanism 4 to a certain extent, and thus improving the cleanliness of the drive mechanism 4 to a certain extent.

[0084] This application does not specify the specific structure of piston 43 or the connection method between piston 43 and drive rod 42. The specific structure of piston 43 can refer to the structure of piston in hydraulic cylinder in the prior art, and the connection method between piston 43 and drive rod 42 can refer to the fixed connection method between piston and piston rod in hydraulic cylinder in the prior art.

[0085] This application does not specifically limit the structure of the cylinder block 41; preferably, refer to... Figure 1 and Figure 2 The cylinder body 41 includes a base plate 411, a cylinder barrel 412 disposed on the base plate 411, and a through cover 413 disposed on the cylinder barrel 412. The drive rod 42 passes through the through cover 413, the liquid inlet 416 is disposed on the through cover 413, and the air inlet 417 is disposed on the base plate 411. The base plate 411 is fixedly connected to the support plate 1, and the cylinder barrel 412 is located between the base plate 411 and the support plate 1.

[0086] Understandably, a portion of the base plate 411 forms the end cap of the cylinder block 41, the cylinder barrel 412 is fixedly connected to the base plate 411, and the through cover 413 is fixedly connected to the cylinder barrel 412.

[0087] Since the base plate 411 is fixedly connected to the support plate 1, and the cylinder 41 is located between the base plate 411 and the support plate 1, the drive mechanism 4 is fixed, thereby increasing the stability of the drive mechanism 4. At the same time, the base plate 411 can not only form at least part of the structure of the cylinder 41, but also fix the drive mechanism 4 to the support plate 1, so as to avoid the need to set up a separate component to fix the drive mechanism 4, thereby reducing the size of the drive mechanism 4 and thus reducing the volume of the clamping device. This reduces the risk that the clamping device may interfere with the stroke of the processing equipment, thereby ensuring that the processing equipment can perform normal processing on the workpiece 10 installed on the clamping device.

[0088] Specifically, the cover 413 is provided with an extension hole for the drive rod 42 to extend out. A sealing ring is provided between the wall of the extension hole and the drive rod 42. A sealing ring is also provided between the cover 413 and the cylinder 412. Sealing rings are also provided between the piston 43 and the drive rod 42, and between the piston 43 and the inner wall of the cylinder 412. A sealing ring is also provided between the cylinder 412 and the base plate 411 to ensure the sealing of the liquid chamber 414, the gas chamber 415, and the internal space of the cylinder 41.

[0089] This application does not specify the method of fixing the base plate 411 to the support plate 1. Preferably, refer to Figure 1 A fixing plate 11 is provided between the base plate 411 and the support plate 1. One end of the fixing plate 11 is vertically fixed to the support plate 1, and the other end of the fixing plate 11 is fixed to the base plate 411 to increase the stability of the fixed connection between the base plate 411 and the support plate 1. In other embodiments, the base plate 411 can also be fixedly connected to the support plate 1 by a rod-like structure.

[0090] Furthermore, refer to Figure 1 and Figure 2 The base plate 411 is provided with a positioning cavity, and at least a portion of the cylinder 412 extends into the positioning cavity.

[0091] Understandably, the outer circumferential surface of cylinder 412 contacts the cavity wall of the positioning cavity.

[0092] Since the base plate 411 is provided with a positioning cavity, at least a portion of the cylinder 412 extends into the positioning cavity. This allows the cylinder 412 to be positioned by the cooperation between the cylinder 412 and the positioning cavity, thereby increasing the connection stability between the cylinder 412 and the base plate 411. Furthermore, the cooperation between the cylinder 412 and the positioning cavity increases the sealing between the cylinder 412 and the base plate 411, ensuring the driving efficiency of the pressure plate 3 using high-pressure gas. This also avoids noise caused by possible air leakage between the base plate 411 and the cylinder 412. Additionally, it allows for a reduction in the size of the drive mechanism 4 while maintaining the internal volume of the cylinder 412, further reducing the risk of the clamping device interfering with the stroke of the processing equipment. This further ensures that the processing equipment can properly process the workpiece 10 installed on the clamping device.

[0093] In other embodiments, the structure of the cylinder body 41 may also refer to the structure of the cylinder in a hydraulic cylinder in the prior art.

[0094] Furthermore, refer to Figure 3 The pressing device also includes an air tank 6 and a liquid tank 7. The air tank 6 is connected to the air inlet 417 and the liquid tank 7, and the liquid tank 7 is connected to the liquid inlet 416.

[0095] Understandably, the gas storage tank 6 stores high-pressure gas, and the liquid storage tank 7 stores liquid. The liquid is preferably hydraulic oil, but other liquid substances such as water can also be used.

[0096] When the pressure plate 3 is driven toward the direction of the support plate 1, the high-pressure gas in the gas storage tank 6 enters the liquid storage tank 7. As more and more high-pressure gas enters the liquid storage tank 7, the pressure on the liquid in the liquid storage tank 7 increases, so that the liquid in the liquid storage tank 7 enters the liquid chamber 414 through the liquid inlet 416 under the pressure of the high-pressure gas. This causes the piston 43 to drive the drive rod 42 to move away from the pressure plate 3. The drive rod 42 drives the pressure plate 3 to move through the connecting arm 5 and the pull rod 2, so that the pressure plate 3 moves toward the direction of the support plate 1.

[0097] When the pressure plate 3 is driven in a direction away from the support plate 1, the high-pressure gas in the gas storage tank 6 enters the gas chamber 415 through the air inlet. As more and more high-pressure gas enters the gas chamber 415, the piston 43 drives the drive rod 42 to move towards the support plate 1 under the pressure of the high-pressure gas. The drive rod 42 drives the pressure plate 3 to move through the connecting arm 5 and the pull rod 2, so that the pressure plate 3 moves in a direction away from the support plate 1. At the same time, the liquid in the liquid chamber 414 returns to the liquid storage tank 7 under the action of the piston 43.

[0098] In summary, the drive mechanism 4 in this application uses the high-pressure gas in the gas storage tank 6 to pressurize the liquid in the liquid storage tank 7, so that the liquid in the liquid storage tank 7 enters the liquid chamber 414 through the liquid inlet 416, thereby realizing pneumatic pressurization. Compared with the prior art, which uses a motor and pump to provide power to the liquid in the liquid storage tank 7, this reduces the energy consumption of the drive mechanism 4, reduces the noise of the drive mechanism 4, and reduces the operating cost of the drive mechanism 4, while increasing the cleanliness of the pressing device.

[0099] This application does not specify the connection position between the gas storage tank 6 and the liquid storage tank 7. Preferably, refer to Figure 3 The gas storage tank 6 is connected to the liquid storage tank 7 via a gas pipe, and the connection point between the gas pipe and the liquid storage tank 7 is located at the top of the liquid storage tank 7 to prevent liquid from the liquid storage tank 7 from entering the gas storage tank 6. In other embodiments, the gas storage tank 6 may also be connected to other locations of the liquid storage tank 7.

[0100] Furthermore, refer to Figure 3 The pressing device also includes a pressure cylinder 8 and a pressure cylinder 9. The pressure cylinder 8 is connected to the liquid storage tank 7, and the pressure cylinder 9 is connected to the air storage tank 6. The piston rod of the pressure cylinder 9 has an extended position and a retracted position. When the piston rod is in the extended position, the piston rod extends into the pressure cylinder 8.

[0101] It is understandable that the booster cylinder 8 and the booster cylinder 9 are coaxially arranged, and the liquid in the storage tank 7 enters the liquid chamber 414 through the booster cylinder 8 and the liquid inlet 416.

[0102] When the pressure plate 3 is driven toward the direction of the support plate 1, the high-pressure gas in the gas storage tank 6 enters the liquid storage tank 7, so that the pressure on the liquid in the liquid storage tank 7 gradually increases. Then, the liquid in the liquid storage tank 7 enters the pressure boosting cylinder 8 under the action of the high-pressure gas. At the same time, the piston rod of the pressure boosting cylinder 9 moves toward the retracted position under the action of the liquid entering the pressure boosting cylinder 8, so that more liquid enters the pressure boosting cylinder 8. Then, the high-pressure gas in the gas storage tank 6 enters one of the chambers of the pressure boosting cylinder 9, so that the piston rod of the pressure boosting cylinder 9 moves toward the extended position, so that the piston rod of the pressure boosting cylinder 9 extends into the pressure boosting cylinder 8, so that the piston rod of the pressure boosting cylinder 9 continues to pressurize the liquid in the pressure boosting cylinder 8. This realizes the further pressurization of the liquid by the pressure boosting cylinder 9, so as to increase the pressure that the pressure plate 3 can apply to the workpiece 10, and further increase the fixing stability of the pressure plate 3 on the workpiece 10.

[0103] When the pressure plate 3 is driven in the direction away from the support plate 1, the high-pressure gas in the gas storage tank 6 enters the gas chamber 415 through the air inlet 417, so that the piston 43 is pushed by the high-pressure gas, which in turn causes the piston 43 to drive the drive rod 42 to move. The volume of the gas chamber 415 gradually increases, the volume of the liquid chamber 414 gradually decreases, and the liquid in the liquid chamber 414 gradually returns to the liquid storage tank 7 through the liquid inlet 416 under the action of the piston 43. The piston rod of the booster cylinder 9 moves towards the retracted position under the action of the liquid.

[0104] Preferably, when the piston rod of the booster cylinder 9 is in the extended position, the outer circumferential surface of the piston rod of the booster cylinder 9 contacts the inner circumferential surface of the booster cylinder 8, and the piston rod of the booster cylinder 9 can block the connection between the liquid storage tank 7 and the booster cylinder 8, so as to improve the boosting effect of the booster cylinder 9 on the liquid.

[0105] Preferably, the booster cylinder 8 is connected to the liquid inlet 416 through a pipeline, and the inner diameter of the booster cylinder 8 is larger than the inner diameter of the pipeline, so as to further increase the boosting effect of the booster cylinder 9 on the liquid.

[0106] To facilitate understanding of the technical solution in this application, the two chambers of the booster cylinder 9 can be divided into a first chamber and a second chamber. When gas enters the first chamber, the volume of the first chamber gradually increases, the volume of the second chamber gradually decreases, and the piston rod of the booster cylinder 9 moves toward the extended position. When gas enters the second chamber, the volume of the second chamber gradually increases, the volume of the first chamber gradually decreases, and the piston rod of the booster cylinder 9 moves toward the retracted position.

[0107] This application does not specify the connection method between the gas storage tank 6 and the air inlet 417, the liquid storage tank 7, and the booster cylinder 9. Preferably, refer to Figure 3 The pressing device also includes a first two-position five-way valve 61 and a second two-position five-way valve 62 connected to the air storage tank 6. The two ends of the first two-position five-way valve 61 are respectively connected to the air inlet 417 and the liquid storage tank 7, and the two ends of the second two-position five-way valve 62 are respectively connected to the two chambers of the booster cylinder 9.

[0108] Understandably, the two paths of the second two-position five-way valve 62 are connected to the first chamber and the second chamber, respectively.

[0109] When the piston 43 is driven in a direction away from the support plate 1, the high-pressure gas in the gas storage tank 6 enters the liquid storage tank 7 through the first two-position five-way valve 61, so that the liquid in the liquid storage tank 7 enters the pressure boosting cylinder 8. The high-pressure gas in the gas storage tank 6 enters the pressure boosting cylinder 9 through the second two-position five-way valve 62, so that the piston rod of the pressure boosting cylinder 9 moves toward the extended position and extends into the pressure boosting cylinder 8, so as to realize the pressurization of the liquid by the piston rod of the pressure boosting cylinder 9.

[0110] When the piston 43 is driven toward the direction of the support plate 1, the high-pressure gas in the gas tank 6 enters the gas chamber 415 through the inlet 417 via the first two-position five-way valve 61, so that the piston 43 moves toward the direction of the support plate 1 under the action of the high-pressure gas.

[0111] By setting the first two-position five-way valve 61 and the second two-position five-way valve 62, on the one hand, the number of valve bodies can be reduced to lower the manufacturing cost of the pressing device; on the other hand, it can enable the gas storage tank 6 to be connected to the air inlet 417 through the first two-position five-way valve 61, and the liquid storage tank 7 to be connected to the outside through the first two-position five-way valve 61; and when the gas storage tank 6 is connected to one chamber of the booster cylinder 9 through the second two-position five-way valve 62, the other chamber of the booster cylinder 9 to be connected to the outside through the second two-position five-way valve 62, thereby reducing the control difficulty of the pressing device.

[0112] Specifically, the P port of the first two-position five-way valve 61 is connected to the air storage tank 6, the A port of the first two-position five-way valve 61 is connected to the air inlet 417, and the B port of the first two-position five-way valve 61 is connected to the liquid storage tank 7; the P port of the second two-position five-way valve 62 is connected to the air storage tank 6, the A port of the second two-position five-way valve 62 is connected to the second chamber of the booster cylinder 9, and the B port of the second two-position five-way valve 62 is connected to the second chamber of the booster cylinder 9.

[0113] Preferably, both the first and second position five-way valves 61 and 62 are solenoid valves to achieve automatic control.

[0114] Preferably, the P port of the first two-position five-way valve 61 and the P port of the second two-position five-way valve 62 are both connected to the same pipeline connected to the gas storage tank 6 through a three-way connector, so as to reduce the number of pipelines.

[0115] In other implementation examples, separate control valves may be provided for the pipeline connecting the gas storage tank 6 to the air inlet 417, the pipeline connecting the gas storage tank 6 to the liquid storage tank 7, and the pipeline connecting the gas storage tank 6 to the booster cylinder 9.

[0116] It should be noted that when the pressure in the gas storage tank 6 is low, an air compressor can be used to supplement gas into the gas storage tank 6 to increase the gas pressure in the gas storage tank 6.

[0117] In other embodiments, the drive mechanism 4 may also be a cylinder, hydraulic cylinder, electric actuator, linear motor or other structure capable of driving the pull rod 2 to make linear motion.

[0118] This application does not specify a particular number of drive mechanisms 4; preferably, refer to... Figures 1 to 3The drive mechanism 4 is provided in at least two sets, each set of which is provided with a pressure plate 3, a pull rod 2 and a connecting arm 5. The two sets of drive mechanisms 4 share the same air tank 6 and liquid tank 7 to further increase the number of workpieces 10 that the clamping device can fix at one time. Of course, in other embodiments, the drive mechanism 4 may be provided in only one set.

[0119] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0120] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0121] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A clamping device, characterized in that, include: Support plate (1); A pull rod (2) is inserted through the support plate (1). The pull rod (2) has a tension end and a connecting end, and the tension end and the connecting end are respectively located on opposite sides of the support plate (1). The pressure plate (3) and the connecting end are located on the same side of the support plate (1), and the connecting end is connected to the middle part of the length direction of the pressure plate (3), so that both ends of the pressure plate (3) and the support plate (1) form a pressing position; A driving mechanism (4) is connected to the tension end and is used to drive the pull rod (2) to slide relative to the support plate (1) so that the distance between the pressure plate (3) and the support plate (1) changes.

2. The clamping device according to claim 1, characterized in that, The clamping device also includes a connecting arm (5), both ends of which are connected to the pull rods (2), and the connecting end of each pull rod (2) is connected to the pressure plate (3). The driving mechanism (4) is connected to the connecting arm (5) and is located in the middle of the length direction of the connecting arm (5).

3. The clamping device according to claim 2, characterized in that, The connecting arm (5) is located on the side of the driving mechanism (4), and the connecting arm (5) is provided on both opposite sides of the driving mechanism (4).

4. A clamping device according to claim 2, characterized in that, The connecting end is hinged to the pressure plate (3); And / or, the connecting arm (5) is hinged to the drive mechanism (4), and the pull rod (2) is hinged to the connecting arm (5).

5. A clamping device according to any one of claims 1-4, characterized in that, The drive mechanism (4) includes a cylinder (41), a drive rod (42) passing through the cylinder (41), and a piston (43) located inside the cylinder (41) and located on the drive rod (42). One end of the drive rod (42) located outside the cylinder (41) is connected to the pull rod (2). The cylinder (41) has a liquid chamber (414) and a gas chamber (415) inside. The liquid chamber (414) is located on the side of the piston (43) close to the pressure plate (3), and the gas chamber (415) is located on the side of the piston (43) away from the pressure plate (3). The cylinder (41) is provided with a liquid inlet (416) communicating with the liquid chamber (414) and an air inlet (417) communicating with the gas chamber (415).

6. A clamping device according to claim 5, characterized in that, The cylinder body (41) includes a base plate (411), a cylinder barrel (412) disposed on the base plate (411), and a cover (413) disposed on the cylinder barrel (412). The drive rod (42) passes through the cover (413), the liquid inlet (416) is disposed on the cover (413), and the air inlet (417) is disposed on the base plate (411). The base plate (411) is fixedly connected to the support plate (1), and the cylinder barrel (412) is located between the base plate (411) and the support plate (1).

7. A clamping device according to claim 6, characterized in that, The base plate (411) is provided with a positioning cavity, and at least a portion of the cylinder (412) extends into the positioning cavity.

8. A clamping device according to claim 5, characterized in that, The clamping device also includes an air tank (6) and a liquid tank (7), wherein the air tank (6) is connected to the air inlet (417) and the liquid tank (7), and the liquid tank (7) is connected to the liquid inlet (416).

9. A clamping device according to claim 8, characterized in that, The pressing device also includes a pressure cylinder (8) and a pressure cylinder (9). The pressure cylinder (8) is connected to the liquid storage tank (7), and the pressure cylinder (9) is connected to the air storage tank (6). The piston rod of the pressure cylinder (9) has an extended position and a retracted position. When the piston rod is in the extended position, the piston rod extends into the pressure cylinder (8).

10. A clamping device according to claim 9, characterized in that, The clamping device also includes a first two-position five-way valve (61) and a second two-position five-way valve (62) connected to the air storage tank (6). The two ends of the first two-position five-way valve (61) are respectively connected to the air inlet (417) and the liquid storage tank (7), and the two ends of the second two-position five-way valve (62) are respectively connected to the two chambers of the booster cylinder (9).

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