Hydraulic clamp

Abstract

The hydraulic clamp comprises a clamping structure and an adjusting base fixed to the lower end of the clamping structure, the adjusting base comprises a fixing plate, a connecting plate and a hydraulic rod, one end of the connecting plate is rotationally connected with the fixing plate, the hydraulic rod drives the fixing plate to rotate around a rotating part through a transmission shaft, and angle adjustment is achieved; the rotating angle of the fixing plate is accurately controlled through the design of the rotating shaft and the rotating groove, the dial provides clear angle indication and ensures the adjusting precision, the hydraulic rod provides stable torque through hydraulic transmission, angle adjusting is accurate and stable, the hydraulic clamp can flexibly adjust the clamping angle according to the requirements of materials or workpieces through the design, the operation efficiency is improved, and the practicability is high. And meanwhile, angle limitation and complex operation of a traditional clamp are avoided, the structure is simplified, and the overall reliability and convenience are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of clamps, in particular to a hydraulic clamp. BACKGROUND

[0002] As an important tooling clamp, hydraulic clamps are widely used in industrial manufacturing, assembly processing and other fields, and play a key role in the process of clamping and fixing materials. Traditional hydraulic clamps usually realize clamping of workpieces through hydraulic driving structure, and have the characteristics of strong clamping force and convenient operation. However, such hydraulic clamps are usually designed as fixed structures, which are difficult to meet the needs of clamping workpieces at different angles in specific situations. Due to the lack of angle adjustment function, traditional hydraulic clamps have certain limitations when facing scenes that require multi-angle processing or assembly.

[0003] In order to solve the problem that the traditional hydraulic clamp cannot adjust the angle, some existing technologies have proposed some solutions. For example, some technologies set a rotating base or a movable joint, so that the clamping structure can rotate relative to the base, thereby realizing angle adjustment. Some other solutions use electric or mechanical driving systems to enable the clamp to adjust the angle within a certain range to adapt to the processing needs of different workpieces. These technologies have solved the problem of angle adjustment to some extent, improving the adaptability and flexibility of the hydraulic clamp.

[0004] Although the existing technology can realize the angle adjustment of the hydraulic clamp, there are still some defects. First, the design of some solutions based on rotating base or movable joint is complex, resulting in a relatively large overall structure of the device, which is difficult to adapt to compact working space; second, the driving system usually relies on additional control devices or external power sources, increasing the maintenance cost and operation complexity; in addition, these existing solutions still have deficiencies in the stability of angle adjustment, which may cause the clamp to loosen or deviate when a large clamping force is applied, affecting the processing precision of the workpiece. Therefore, in view of these problems, it is of important application value and practical significance to provide a hydraulic clamp that can adjust the angle and has simple structure and high stability. CONTENT OF THE INVENTION

[0005] Therefore, it is necessary to provide a hydraulic clamp that can adjust the angle to solve the above problems.

[0006] Embodiments of the present application provide a hydraulic clamp, comprising a clamping structure and an adjustment base fixed to the lower end of the clamping structure, the adjustment base comprising:

[0007] a fixed plate fixed to the lower end of the clamping structure;

[0008] a connecting plate arranged side by side with the fixed plate, and one end of the connecting plate is rotationally connected with the fixed plate to form a rotating part;

[0009] a hydraulic rod, one end of which penetrates through the connecting plate along the first direction and abuts against the fixed plate, and the other end of which is fixed to the fixed plate, the setting direction of the clamping structure and the adjusting base being perpendicular to the first direction, and the hydraulic rod being capable of driving the fixed plate to rotate around the rotating part when viewed along the first direction.

[0010] In at least one embodiment of the present application, the connecting plate comprises a rotating shaft, a rotating groove being formed in the rotating part when viewed along the first direction, one end of the fixed plate being arranged in the rotating groove, and the rotating shaft penetrating through the rotating groove and the fixed plate in sequence along the first direction and being fixed to the rotating part, the rotating shaft being rotatably connected with the fixed plate.

[0011] In at least one embodiment of the present application, the connecting plate comprises a scale disc, the scale disc being arranged on the rotating part and being fixedly connected with the rotating shaft, the scale disc having scale lines from 0° to 180° when viewed along the first direction, the fixed plate and the connecting plate having the smallest angle around the rotating shaft when the connecting plate abuts against the fixed plate towards the plane of the fixed plate, and the 0° scale line of the scale disc being aligned with the edge line of the intersection of the fixed plate and the connecting plate at this time.

[0012] In at least one embodiment of the present application, the connecting plate is provided with a receiving hole when viewed along the direction perpendicular to the first direction, and the hydraulic rod penetrates through the receiving hole and abuts against the fixed plate.

[0013] In at least one embodiment of the present application, the hydraulic rod comprises a transmission shaft, the transmission shaft abutting against the fixed plate when viewed along the first direction, and the hydraulic rod being capable of driving the transmission shaft to stretch and contract along the first direction to drive the fixed plate to rotate around the rotating shaft.

[0014] In at least one embodiment of the present application, the clamping structure comprises a hydraulic structure, a sliding clamping plate and a fixed clamping plate arranged in sequence along the same direction;

[0015] The hydraulic structure is drivingly connected with the sliding clamping plate, and the hydraulic structure is capable of driving the sliding clamping plate to clamp on the fixed clamping plate along the length direction of the hydraulic structure.

[0016] In at least one embodiment of the present application, the clamping structure further comprises a fixed base, one end of the fixed base being fixedly connected with the fixed plate when viewed along the first direction, the other end of the fixed base being movably connected with the hydraulic structure, the sliding clamping plate and the fixed clamping plate, and the sliding clamping plate and the fixed clamping plate being arranged at two ends of the fixed base respectively, one end of the hydraulic structure being fixedly connected with the fixed base, and the other end of the hydraulic structure being drivingly connected with the sliding clamping plate;

[0017] The fixed base is provided with a sliding groove penetrating along the vertical direction of the first direction, and the hydraulic structure can drive the sliding clamping plate to slide along the length direction of the sliding groove.

[0018] In at least one embodiment of the present application, the sliding clamping plate comprises a guide block fixedly connected with the sliding clamping plate, and the hydraulic structure penetrates the guide block and is in transmission connection with the sliding clamping plate, and the guide block is arranged in the sliding groove and is in sliding connection with the sliding groove.

[0019] In at least one embodiment of the present application, the contact surfaces of the sliding clamping plate and the fixed clamping plate with the clamped material are coated with an anti-skid layer.

[0020] In at least one embodiment of the present application, the rotating shaft is made of stainless steel.

[0021] The hydraulic clamp provided above realizes the function of angle adjustment by designing the adjusting base and the connection mode between the adjusting base and the clamping structure. Specifically, the adjusting base comprises a fixed plate, a connecting plate and a hydraulic rod, one end of the connecting plate is rotationally connected with the fixed plate, and the hydraulic rod drives the fixed plate to rotate along the rotating part through the transmission shaft thereof, so as to realize the angle adjustment of the clamping structure. Through the arrangement of the rotating shaft and the rotating groove, the rotating angle of the fixed plate can be accurately controlled by the connecting plate, and the addition of the scale disc further provides clear angle indication, so as to ensure the accuracy of angle adjustment. In addition, the hydraulic rod provides stable torque through hydraulic transmission, so that the angle adjustment is not only accurate but also stable. Through this design, the hydraulic clamp can adjust the clamping angle according to the requirements of the material or workpiece, which improves the flexibility and adaptability of the equipment, enhances the operation efficiency in different workpiece clamping and machining environments, and has simple structure and convenient operation, avoiding the angle limitation and complex operation of the traditional clamp. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view of a hydraulic clamp;

[0023] Figure 2 It is a partial structure diagram of a hydraulic clamp;

[0024] Figure 3 It is an axial exploded view of a hydraulic clamp;

[0025] Figure 4 It is an exploded view of the adjusting base;

[0026] Figure 5 It is a front view of a clamping structure;

[0027] Figure 6 It is an axial exploded view of the front view of the clamping structure;

[0028] Figure 7 is a top view of the clamping structure.

[0029] Explanation of main element symbols

[0030] 1, clamping structure; 2, adjusting base; 3, fixed plate; 4, connecting plate; 5, rotating part; 6, hydraulic rod; F, first direction; 8, rotating groove; 9, rotating shaft; 10, dial; 12, accommodating hole; 13, transmission shaft; 14, sliding clamping plate; 15, fixed clamping plate; 16, hydraulic structure; 17, fixed base; 18, sliding groove; 19, guide block; 100, hydraulic clamp. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0032] It should be noted that when one component is considered to be "connected" to another component, it can be directly connected to the other component or a middle component can exist at the same time. When one component is considered to be "provided on" another component, it can be directly provided on the other component or a middle component can exist at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and the like used herein are for illustrative purposes only.

[0033] The embodiments of the present application provide a hydraulic clamp, comprising a clamping structure and an adjusting base fixed to the lower end of the clamping structure, the adjusting base comprising:

[0034] a fixed plate fixed to the lower end of the clamping structure;

[0035] a connecting plate arranged side by side with the fixed plate, and one end of the connecting plate is rotationally connected with the fixed plate to form a rotating part;

[0036] a hydraulic rod, one end of which penetrates through the connecting plate along the first direction and abuts against the fixed plate, and the other end of which is fixed to the fixed plate, the setting direction of the clamping structure and the adjusting base being perpendicular to the first direction, and as viewed along the first direction, the hydraulic rod can drive the fixed plate to rotate around the rotating part.

[0037] The hydraulic clamp provided above realizes the function of angle adjustment by adjusting the base and the connection mode of the base and the clamping structure. Specifically, the adjusting base includes a fixed plate, a connecting plate, and a hydraulic rod, wherein one end of the connecting plate is rotationally connected with the fixed plate, and the hydraulic rod drives the fixed plate to rotate along the rotating part through the transmission shaft thereof, so that the angle adjustment of the clamping structure is realized. Through the setting of the rotating shaft and the rotating groove, the rotating angle of the fixed plate can be accurately controlled by the connecting plate, and the addition of the scale disc further provides clear angle indication, so as to ensure the accuracy of angle adjustment. In addition, the hydraulic rod provides stable torque through hydraulic transmission, so that the angle adjustment is not only accurate but also stable. Through this design, the hydraulic clamp can adjust the clamping angle according to the requirements of the materials or workpieces, improves the flexibility and adaptability of the equipment, enhances the operation efficiency in different workpiece clamping and machining environments, and has simple structure and convenient operation, avoiding the angle limitation and complex operation of the traditional clamp.

[0038] The following will be described in detail in combination with the accompanying drawings Figure 1 Figure 7 Some embodiments of the present application will be described in detail. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0039] The embodiments of the present application provide a hydraulic clamp 100, which includes a clamping structure 1 and an adjusting base 2 fixed to the lower end of the clamping structure 1, and the adjusting base 2 includes:

[0040] A fixed plate 3 is fixed to the lower end of the clamping structure 1.

[0041] A connecting plate 4 is arranged side by side with the fixed plate 3, and one end of the connecting plate 4 is rotationally connected with the fixed plate 3 to form a rotating part 5.

[0042] A hydraulic rod 6 penetrates through the connecting plate 4 along the first direction F and abuts against the fixed plate 3 at one end, and is fixed to the fixed plate 3 at the other end. The setting direction of the clamping structure 1 and the adjusting base 2 is perpendicular to the first direction F, and when observed along the first direction F, the hydraulic rod 6 can drive the fixed plate 3 to rotate around the rotating part 5.

[0043] ​Specifically, the hydraulic clamp realizes the angle adjustment function through the design of the fixed plate 3, the connecting plate 4, and the hydraulic rod 6. The transmission shaft 13 of the hydraulic rod 6 penetrates the connecting plate 4 and is rotationally connected with the fixed plate 3. Through hydraulic driving, the fixed plate 3 is rotated around the rotating part 5, thereby adjusting the angle of the clamping structure 1. In terms of characteristic connection, the role of the hydraulic rod 6 is to provide a rotating torque through hydraulic driving, and the angle adjustment is realized through the rotational connection of the rotating part 5 with the fixed plate 3. In terms of position relationship, the rotating shaft 9 between the connecting plate 4 and the fixed plate 3 enables the fixed plate 3 to rotate smoothly to the required angle. The beneficial effect of this design is that the hydraulic rod 6 provides precise and stable force transmission, making the angle adjustment process more stable and efficient, and avoiding the problems of inaccurate angle adjustment and complicated operation of traditional clamps. Through hydraulic driving, the clamp can firmly clamp the workpiece at different angles to meet various process requirements. Especially in scenarios where the clamping angle needs to be adjusted, the stability and efficiency of hydraulic driving can effectively improve work efficiency and operation accuracy. For example, in the process of numerical control machine tool machining or precision assembly, accurate clamping angle adjustment can ensure that the workpiece does not deform or displace when clamped, improving the safety and reliability of clamping.

[0044] Furthermore, the connecting plate 4 includes a rotating shaft 9, and a rotating groove 8 is formed on the rotating part 5 as viewed along the first direction F. One end of the fixed plate 3 is arranged in the rotating groove 8, and the rotating shaft 9 penetrates the rotating groove 8 and the fixed plate 3 in sequence along the first direction F and is fixed on the rotating part 5. The rotating shaft 9 is rotationally connected with the fixed plate 3.

[0045] Specifically, the design of the rotating shaft 9 and the rotating groove 8 further improves the accuracy and stability of angle adjustment. The rotating groove 8 is formed on the connecting plate 4 and closely cooperates with the rotating shaft 9. The rotating shaft 9 penetrates the rotating groove 8 and the fixed plate 3 and is rotationally connected with the fixed plate 3. The characteristic connection relationship of this design ensures the smooth rotation of the fixed plate 3 during adjustment. The combination of the rotating shaft 9 and the rotating groove 8 controls the rotation of the fixed plate 3, avoiding excessive friction or instability during rotation. Through this design, the angle adjustment of the clamping structure 1 can be ensured to have high precision and high reliability. In application, the cooperation of the rotating groove 8 and the rotating shaft 9 makes the angle adjustment very smooth, avoiding the problem of inaccurate angle adjustment caused by unstable structure or loose adjustment components in traditional clamps, ensuring stable operation in high-precision environments.

[0046] Further, the connecting plate 4 comprises a scale disc 10, which is arranged on the rotating part 5 and fixedly connected with the rotating shaft 9. When viewed along the first direction F, the scale disc 10 has scale lines from 0° to 180°. When the connecting plate 4 abuts against the fixed plate 3, the fixed plate 3 and the connecting plate 4 have the smallest angle around the rotating shaft 9, and at this time, the 0° scale line of the scale disc 10 is aligned with the edge line of the intersection of the fixed plate 3 and the connecting plate 4.

[0047] Specifically, the scale disc 10 is added, and the scale lines from 0° to 180° are marked on the scale disc 10, which further improves the accuracy and operability of angle adjustment. The rotating shaft 9 is fixedly connected with the scale disc 10, and when the connecting plate 4 rotates to the fixed plate 3, the 0° scale line is aligned with the edge line of the intersection of the fixed plate 3, thereby providing clear angle indication. The characteristic connection relationship of this design enables the operator to clearly understand the current clamping angle through the scale disc 10, avoiding errors during angle adjustment. Through the scale disc 10, the operator can quickly and accurately complete the angle setting without relying on external tools. This design is particularly important for scenarios with high angle accuracy requirements, such as in precision machining, assembly and detection processes, where angle fine-tuning may directly affect machining precision or product quality. The use of the scale disc 10 makes the clamp operation more convenient, enhancing its adaptability in complex tasks.

[0048] Further, when viewed perpendicular to the first direction F, the connecting plate 4 is provided with a receiving hole 12, and the hydraulic rod 6 penetrates through the receiving hole 12 and abuts against the fixed plate 3.

[0049] Specifically, the receiving hole 12 optimizes the cooperation between the hydraulic rod 6 and other components. The hydraulic rod 6 penetrates through the connecting plate 4 through the receiving hole 12 and effectively abuts against the fixed plate 3. The characteristic connection relationship of this design enables the hydraulic rod 6 to accurately transmit power while being less likely to displace or deform during transmission. The arrangement of the receiving hole 12 ensures the stability and accurate positioning of the hydraulic rod 6 inside the clamp, so that the hydraulic rod 6 can stably exert its driving force to drive the fixed plate 3 to adjust the angle. Through this design, the power of the hydraulic rod 6 can be effectively transmitted, and the angle adjustment will not be inaccurate due to loose or unstable clamp structure. In addition, the design of the receiving hole 12 simplifies the installation and maintenance of the hydraulic rod 6, reducing the complexity of the hydraulic system.

[0050] Further, the hydraulic rod 6 comprises a transmission shaft 13, which abuts against the fixed plate 3 when viewed along the first direction F, and the hydraulic rod 6 can drive the transmission shaft 13 to extend and retract along the first direction F to drive the fixed plate 3 to rotate around the rotating shaft 9.

[0051] Specifically, the design of the transmission shaft 13 is introduced, and the hydraulic rod 6 drives the fixed plate 3 to rotate around the rotating shaft 9 through the transmission shaft 13. The characteristic connection relationship of this design is that the transmission shaft 13 effectively transmits the driving force of the hydraulic rod 6 to the fixed plate 3, thereby driving it to rotate around the rotating shaft 9. The design of the transmission shaft 13 optimizes the power transmission of the hydraulic system, making the angle adjustment process more stable and controllable. When the hydraulic system is working, the transmission shaft 13 transmits power through the hydraulic rod 6 and drives the fixed plate 3 to move. Compared with traditional hydraulic clamps, the addition of the transmission shaft 13 improves the stability and response speed of the system, enabling the clamp to complete the task more efficiently and accurately during angle adjustment.

[0052] Further, the clamping structure 1 comprises a hydraulic structure 16, a sliding clamp plate 14 and a fixed clamp plate 15 arranged in sequence along the same direction;

[0053] The hydraulic structure 16 is in transmission connection with the sliding clamp plate 14, and in the length direction of the hydraulic structure 16, the hydraulic structure 16 can drive the sliding clamp plate 14 to be clamped on the fixed clamp plate 15.

[0054] Specifically, the combination of the hydraulic structure 16, the sliding clamp plate 14 and the fixed clamp plate 15 enables the hydraulic structure 16 to drive the sliding clamp plate 14 to be clamped on the fixed clamp plate 15. In terms of characteristic connection, the hydraulic structure 16 is in transmission connection with the sliding clamp plate 14, and generates clamping force through hydraulic drive to accurately clamp the material. The design of the sliding clamp plate 14 and the fixed clamp plate 15 realizes flexible clamping force adjustment, adapting to the needs of different material sizes and shapes. The hydraulic structure 16 drives the sliding of the sliding clamp plate 14, realizing the clamping or loosening of the material in the clamp. The beneficial effects of this design are that the hydraulic drive provides stable clamping force, can accurately control the clamping pressure, avoids the problem of uneven force of traditional clamps, and can flexibly adjust the clamping strength according to the needs of different materials.

[0055] Further, the clamping structure 1 further comprises a fixed base 17, which is fixedly connected with the fixed plate 3 at one end and movably connected with the hydraulic structure 16, the sliding clamp plate 14 and the fixed clamp plate 15 at the other end when viewed along the first direction F, and the sliding clamp plate 14 and the fixed clamp plate 15 are respectively arranged at both ends of the fixed base 17, and one end of the hydraulic structure 16 is fixedly connected with the fixed base 17, and the other end is in transmission connection with the sliding clamp plate 14;

[0056] The fixed base 17 is provided with a sliding groove 18 penetrating perpendicular to the first direction F, and the hydraulic structure 16 can drive the sliding clamp plate 14 to slide along the length direction of the sliding groove 18.

[0057] Specifically, by designing the fixed base 17, the hydraulic structure 16, the sliding clamp plate 14, and the fixed clamp plate 15 can slide along the sliding groove 18, thereby achieving a larger clamping range. In terms of feature connection, the connection of the fixed base 17 with the hydraulic structure 16, the sliding clamp plate 14, and the fixed clamp plate 15 enables the clamp to clamp materials in a larger range during operation. The design of the sliding groove 18 provides a movement path for the sliding clamp plate 14, ensuring smooth operation during clamping. Through this design, the clamp can adapt to the clamping needs of different materials, especially suitable for scenarios where materials of different sizes or a larger clamping range are required. In application, the design of the sliding groove 18 provides a smooth sliding track, reducing friction and wear, and prolonging the service life of the clamp.

[0058] Furthermore, the sliding clamp plate 14 includes a guide block 19 fixedly connected with the sliding clamp plate 14, and the hydraulic structure 16 penetrates the guide block 19 and is in transmission connection with the sliding clamp plate 14. The guide block 19 is arranged in the sliding groove 18 and is in sliding connection with the sliding groove 18.

[0059] Specifically, the guide block 19 is added to the sliding clamp plate 14 to ensure that the sliding clamp plate 14 maintains a stable trajectory during sliding. The guide block 19 is fixedly connected with the sliding clamp plate 14, ensuring that the sliding clamp plate 14 slides smoothly in the sliding groove 18, avoiding deviation or jamming during clamping operation. The feature connection of this design enables the sliding clamp plate 14 to be accurately aligned during sliding, improving the precision and safety of clamping operation. The guide block 19 not only increases stability but also reduces friction between the sliding clamp plate 14 and the sliding groove 18, improving operation smoothness.

[0060] Furthermore, the contact surfaces of the sliding clamp plate 14 and the fixed clamp plate 15 with the clamped materials are coated with a non-slip layer.

[0061] Specifically, the contact surfaces of the sliding clamp plate 14 and the fixed clamp plate 15 are coated with a non-slip layer to increase friction and improve clamping force, preventing the clamp from sliding or loosening during clamping. The addition of the non-slip layer enables the clamp to stably clamp materials, especially suitable for materials with smooth surfaces or easy sliding. In application, the non-slip layer can effectively improve the applicability of the clamp, reduce the problem of unstable clamping caused by material sliding, and provide additional stability to ensure continuous and stable clamping force, especially in fields requiring high clamping force, such as metal processing or heavy machinery assembly.

[0062] Furthermore, the rotating shaft 9 is made of stainless steel.

[0063] Specifically, the material of the rotating shaft 9 is selected as stainless steel, which improves the strength, durability and corrosion resistance of the rotating part 5. The use of stainless steel material ensures that the rotating shaft 9 can still maintain high stability in long-term and high-load use environment, avoiding the problem that the performance of traditional materials may be reduced due to wear or corrosion. The selection of stainless steel increases the corrosion resistance of the rotating shaft 9, which is suitable for humid or chemically corrosive environment, prolonging the service life of the equipment.

[0064] The above only describes the embodiments of the present application, and it should be pointed out that those skilled in the art can make improvements without departing from the inventive concept of the present application, but these all belong to the protection scope of the present application.

Claims

1. A hydraulic clamp, comprising a clamping structure and an adjusting base fixed to the lower end of the clamping structure, characterized in that, The adjustment base includes: A fixing plate is fixed to the lower end of the clamping structure; A connecting plate is arranged side by side with the fixing plate, and one end of the connecting plate is rotatably connected to the fixing plate to form a rotating part; The direction perpendicular to the clamping structure and the adjusting base is denoted as the first direction; A hydraulic rod has one end passing through the connecting plate along the first direction and abutting against the fixed plate, and the other end fixed to the fixed plate. When viewed along the first direction, the hydraulic rod can drive the fixed plate to rotate around the rotating part.

2. A hydraulic clamp according to claim 1, characterized in that, The connecting plate includes a rotating shaft. When viewed along the first direction, a rotating groove is provided on the rotating part. One end of the fixed plate is disposed in the rotating groove, and the rotating shaft passes through the rotating groove and the fixed plate in sequence along the first direction and is fixed to the rotating part. The rotating shaft is rotatably connected to the fixed plate.

3. A hydraulic clamp according to claim 2, characterized in that, The connecting plate includes a scale dial, which is disposed on the rotating part and fixedly connected to the rotating shaft. When viewed along the first direction, the scale dial has scale lines from 0° to 180°. When the connecting plate abuts against the fixed plate with its plane facing the fixed plate, the fixed plate and the connecting plate have a minimum angle around the rotating shaft. At this time, the 0° scale line of the scale dial is aligned with the edge line of the intersection of the fixed plate and the connecting plate.

4. A hydraulic clamp according to claim 1, characterized in that, Viewed along a direction perpendicular to the first direction, the connecting plate has a receiving hole, and the hydraulic rod passes through the receiving hole and abuts against the fixing plate.

5. A hydraulic clamp according to claim 2, characterized in that, The hydraulic rod includes a drive shaft. When viewed along the first direction, the drive shaft abuts against the fixed plate, and the hydraulic rod can drive the drive shaft to extend and retract along the first direction to drive the fixed plate to rotate around the rotation axis.

6. A hydraulic clamp according to claim 1, characterized in that, The clamping structure includes a hydraulic structure, a sliding clamping plate, and a fixed clamping plate arranged sequentially in the same direction; The hydraulic structure is connected to the sliding clamp in a transmission manner, and in the length direction of the hydraulic structure, the hydraulic structure can drive the sliding clamp to clamp onto the fixed clamp.

7. A hydraulic clamp according to claim 6, characterized in that, The clamping structure also includes a fixed base. When viewed along the first direction, one end of the fixed base is fixedly connected to the fixed plate, and the other end is movably connected to the hydraulic structure, the sliding clamp, and the fixed clamp. The sliding clamp and the fixed clamp are respectively located at both ends of the fixed base. One end of the hydraulic structure is fixedly connected to the fixed base, and the other end is drivenly connected to the sliding clamp. The fixed base has a sliding groove that extends through the base perpendicular to the first direction, and the hydraulic structure can drive the sliding clamp to slide along the length of the sliding groove.

8. A hydraulic clamp according to claim 7, characterized in that, The sliding clamp includes a guide block, which is fixedly connected to the sliding clamp. The hydraulic structure passes through the guide block and is pulsatorically connected to the sliding clamp. The guide block is disposed in the sliding groove and is slidably connected to the sliding groove.

9. A hydraulic clamp according to claim 6, characterized in that, The contact surfaces of the sliding clamp and the fixed clamp with the material being clamped are both coated with an anti-slip layer.

10. A hydraulic clamp according to claim 2, characterized in that, The rotating shaft is made of stainless steel.

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