A clamping structure for a movable working platform of a hydraulic press

Abstract

The present invention relates to the technical field of working platforms, and discloses a clamping structure for a movable working platform of a hydraulic press, comprising a platform plate and a base, wherein the top of the platform plate is fixed to the top of the base by four pillars, two mounting openings are provided on both sides of the top of the platform plate, and guide blocks are detachably mounted inside the four mounting openings through clamping assemblies, and inclined guide grooves are provided inside the four guide blocks. The clamping structure for the movable working platform of the hydraulic press, by providing inclined guide grooves inside the guide blocks, facilitates the inclined movement of the clamping assemblies along the inclined guide grooves during the lateral movement, thereby realizing the tightening of multiple corners of a workpiece by multiple clamping assemblies. It not only has a multi-angle tightening function, thereby improving its tightening effect, but also can replace the guide blocks according to workpieces of different shapes and sizes, and adjust the angles of the clamping assemblies, thereby further enhancing the functionality of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of working platforms, in particular to a clamping structure for a movable working platform of a hydraulic press. Background Art

[0002] A hydraulic press is a machine that uses the static pressure of liquid to process metal, plastic, rubber, wood, powder and other products. When processing workpieces, a hydraulic press generally needs to be equipped with a corresponding work platform to support, position and clamp the workpiece through the work platform to ensure its stability during the processing.

[0003] The Chinese utility model patent with publication number CN216941922U discloses a clamping mechanism for a movable working platform of a hydraulic press, comprising a main machine, the upper end of which is fixedly connected to a load-bearing platform via a first column, the upper end of which is fixedly connected to a top block via a second column, the upper end of which is fixedly mounted with an oil tank, the oil tank being electrically connected to the circuit portion of the main machine via a wire, a hydraulic push rod being mounted at the lower end of the top block, the upper end of which is fixedly connected to an outer ring frame, the inner end of which is fixedly mounted inside the outer ring frame, and a lead screw being connected between the inner and outer ring frames so as to rotate uniformly along the circumferential direction. The utility model can firmly clamp cylindrical parts in workpieces processed by a hydraulic press by providing a clamping part, a No. 1 transmission part, and a No. 2 transmission part, thereby solving the problem that traditional clamping mechanisms have difficulty clamping cylindrical parts. In addition, the utility model does not require multiple electric push rods and only uses a single motor drive, resulting in low production costs. At the same time, the energy consumption during clamping is low, which conforms to the concept of energy conservation and environmental protection.

[0004] In the related art, the working platform of the existing hydraulic press can usually only tighten workpieces of a single shape when clamping the workpiece, and the shapes of the workpieces are mostly divided into cylindrical and block shapes. Due to the different shapes of different workpieces, during the clamping process, the clamping accessories of a single shape cannot achieve the clamping of different workpieces. Moreover, the single two-sided clamping method in the existing technology has large clamping limitations. When encountering high-intensity hydraulic power, the workpiece is prone to offset, affecting its processing effect. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the present invention provides a clamping structure for a hydraulic press movable working platform, which has the function of fastening multiple corners of the workpiece. It not only realizes the multi-angle fastening function and improves its fastening effect, but also can replace the guide block according to the workpieces of different shapes and sizes, further enhancing the functionality of the equipment, and solving the problems in the existing technology that it is impossible to combine the clamping methods of workpieces of different shapes, and adopts a single two-sided fastening, which is insufficient in stability and prone to workpiece deviation.

[0007] (2) Technical solution

[0008] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0009] Preferably, the clamping assembly includes a movable frame sliding on the inner side of the movable plate, the guide rod slides inside the movable frame, both ends of the guide rod extend to the outside of the movable frame, and an L-shaped clamping block is provided on one side of the movable frame.

[0010] Preferably, the outer surface of the guide rod is fixedly connected to a driving plate, and the driving plate is located inside the movable frame, a first spring is fixedly connected between the top of the driving plate and the top of the inner wall of the movable frame, one side of the movable frame is fixedly connected to a U-shaped block, the interior of the U-shaped block is rotatably connected to a rotating shaft, and the outer surface of the rotating shaft is fixedly connected to a connecting block, and one side of the connecting block is fixedly connected to the outer side surface of the L-shaped clamping block, the top of the rotating shaft extends to the top of the U-shaped block, the outer surface of the top of the rotating shaft is fixedly connected to a circular block, and the outer surface of the circular block is provided with a number of bayonet slots, and one side of the top of the U-shaped block is slidably connected to a T-shaped metal block, and the top of the U-shaped block is fixedly connected to two magnet blocks.

[0011] Preferably, the driving assembly includes a hydraulic telescopic rod fixed to the bottom of the platform plate through a bracket, and a U-shaped frame sliding on both sides of the bottom of the platform plate, the tops of the two U-shaped frames are respectively fixed to the bottoms of the two movable plates, the telescopic end of the hydraulic telescopic rod is fixedly connected to the lifting plate, and the two sides of the lifting plate are hinged with driving frames, and the other sides of the two driving frames are respectively connected to the internal rotation of the two U-shaped frames.

[0012] Preferably, guide rods are fixedly connected to both sides of the top of the base, and the two guide rods are slidably connected to the inside of the lifting plate.

[0013] Preferably, the negative pressure adsorption component includes a negative pressure frame fixed inside the circular mouth, a plurality of negative pressure nozzles are fixedly connected to the top of the negative pressure frame, and the plurality of negative pressure nozzles are connected to the interior of the negative pressure frame, the tops of the plurality of negative pressure nozzles are flush with the height of the top of the platform plate, and sealing rings are installed on the tops of the plurality of negative pressure nozzles, a suction pump is fixedly connected to the top of the base, and the suction port of the suction pump is connected to the interior of the negative pressure frame through a suction pipe.

[0014] Preferably, the clamping assembly includes a U-shaped frame fixed to the bottom of the platform plate, two L-shaped frames are slidably connected to one side of the inner wall of the U-shaped frame, one end of the two L-shaped frames is fixedly connected to a T-shaped clamping block, a second spring is fixedly connected between the outer side surfaces of the two T-shaped clamping blocks and the inner wall of the U-shaped frame, and clamping holes are provided at the bottom of both sides of the guide block.

[0015] Preferably, the other ends of the two L-shaped frames are both set as inclined surfaces, and one side of the U-shaped frame is slidably connected to an operating rod, one end of the operating rod is fixedly connected to a trapezoidal block, and the two inclined surfaces of the trapezoidal block are respectively slidably connected to the inclined surfaces of the two L-shaped frames.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a clamping structure for a movable working platform of a hydraulic press, which has the following beneficial effects:

[0018] 1. The present invention is used to drive the two movable plates to move relative to or apart through the setting of the driving assembly. The relative movement of the two movable plates can drive the clamping assemblies on the two movable plates to move in relative directions, thereby realizing the fastening of the workpiece. Moreover, by providing an inclined guide groove inside the guide block, the clamping assembly can also perform an inclined movement along the inclined guide groove during the lateral movement, thereby realizing the fastening of multiple clamping assemblies to multiple corners of the workpiece. It not only has a multi-angle fastening function and improves its fastening effect, but also can replace the guide block according to workpieces of different shapes and sizes, and adjust the angle of the clamping assembly, thereby further enhancing the functionality of the equipment.

[0019] 2. The present invention uses a suction pump to suck air into the negative pressure frame, so that negative pressure is formed inside the negative pressure frame, and then the workpiece located on the top of the platform plate is adsorbed and locked through a number of negative pressure nozzles, thereby ensuring the stability of the workpiece during processing and avoiding the offset problem during the processing of the workpiece.

[0020] 3. The present invention can insert the two T-shaped clamping blocks in the clamping assembly into the clamping holes at the corresponding positions of the guide block through the relative movement of the two T-shaped clamping blocks, thereby locking the guide block. On the contrary, the locking of the guide block can be lost through the movement of the two T-shaped clamping blocks away from each other, thereby facilitating the disassembly of the guide block. It has good disassembly and assembly functions, which makes it easy for the staff to replace the inclined guide grooves of the guide blocks with different inclination angles according to workpieces of different sizes, thereby meeting the fastening work of workpieces of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a clamping structure for a movable working platform of a hydraulic press proposed by the present invention;

[0022] Figure 2 This is an exploded schematic diagram of a clamping structure for a movable working platform of a hydraulic press proposed by the present invention;

[0023] Figure 3 This is a top view of the structure of the platform plate in the clamping structure of the movable working platform of a hydraulic press proposed by the present invention;

[0024] Figure 4 This is a bottom view of the structure of the platform plate in the clamping structure of the movable working platform of the hydraulic press proposed by the present invention;

[0025] Figure 5 This is a structural schematic diagram of a driving assembly in a clamping structure of a movable working platform of a hydraulic press proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the combination of a guide block and a clamping assembly in a clamping structure of a movable working platform of a hydraulic press proposed by the present invention;

[0027] Figure 7 This is a structural schematic diagram of a clamping assembly in a clamping structure of a movable working platform of a hydraulic press proposed by the present invention;

[0028] Figure 8 This is a schematic diagram of the combination of a clamping assembly and a clamping assembly in a clamping structure of a movable working platform of a hydraulic press proposed by the present invention;

[0029] Figure 9 This is a structural cross-sectional view of a movable frame in a clamping structure of a movable working platform of a hydraulic press proposed by the present invention;

[0030] Figure 10 The present invention proposes a hydraulic press movable working platform clamping structure Figure 9 A local enlarged view of point A;

[0031] Figure 11 This is a structural schematic diagram of a negative pressure adsorption component in a clamping structure of a movable working platform of a hydraulic press proposed by the present invention;

[0032] Figure 12 This is a schematic diagram of clamping a block-shaped workpiece in a clamping structure of a movable working platform of a hydraulic press proposed by the present invention;

[0033] Figure 13 This is a schematic diagram of clamping a cylindrical workpiece in a clamping structure of a movable working platform of a hydraulic press proposed by the present invention.

[0034] In the figure: 1. Platform plate; 2. Mounting port; 3. Clamping assembly; 31. U-shaped frame; 32. L-shaped frame; 33. T-shaped clamping block; 34. Second spring; 35. Operating rod; 36. Trapezoidal block; 4. Guide block; 5. Inclined guide groove; 6. Moving plate; 7. Clamping assembly; 71. Guide rod; 72. Movable frame; 73. Driving plate; 74. First spring; 75. L-shaped clamping block; 76. U-shaped block; 77. Rotating shaft; 78. Connecting block; 79. Round block; 710. T-shaped metal block; 711. Magnet block; 8. Driving assembly; 81. Hydraulic telescopic rod; 82. U-shaped frame; 83. Lifting plate; 84. Driving frame; 85. Guide rod; 9. Negative pressure adsorption assembly; 91. Negative pressure frame; 92. Negative pressure nozzle; 93. Suction pump; 10. Toggle port; 11. Base; 12. Clamping hole. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example 1:

[0037] Refer to the attached Figure 1-13 , a hydraulic press movable working platform clamping structure, including a platform plate 1 and a base 11, the top of the platform plate 1 is fixed to the top of the base 11 by four pillars, two mounting ports 2 are provided on both sides of the top of the platform plate 1, and the inside of the four mounting ports 2 are detachably installed with guide blocks 4 through clamping components 3, and the inside of the four guide blocks 4 are provided with inclined guide grooves 5, and both sides of the top of the platform plate 1 are slidably connected with movable plates 6, and the inner sides of the two movable plates 6 are slidably connected with two adjustable clamping components 7 for clamping the workpiece, and the clamping component 7 includes a guide rod 71 inserted into the inclined guide groove 5, and a driving component 8 for driving the two movable plates 6 relative to or apart is provided at the bottom of the platform plate 1, a circular opening is provided on the platform plate 1, and a negative pressure adsorption component 9 for adsorbing the bottom of the workpiece is provided inside the circular opening, and a toggle opening 10 is provided on the front and back of the platform plate 1;

[0038] The drive assembly 8 is provided to drive the two movable plates 6 to move relative to or apart from each other. The relative movement of the two movable plates 6 can drive the clamping assemblies 7 on the two movable plates 6 to move relative to each other, thereby achieving the tightening of the workpiece.

[0039] By opening an inclined guide groove 5 inside the guide block 4, the clamping assembly 7 can also tilt along the inclined guide groove 5 during the lateral movement, thereby realizing the fastening of multiple clamping assemblies 7 to multiple corners of the workpiece. The inclined guide groove 5 can be inclined at any angle from 30 degrees to 90 degrees, which makes it easy for workers to replace the guide block 4 according to workpieces of different sizes.

[0040] It not only has a multi-angle fastening function to improve its fastening effect, but also can replace the guide block 4 according to the workpieces of different shapes and sizes, and adjust the angle of the clamping assembly 7, further enhancing the functionality of the equipment;

[0041] The setting of the clamping assembly 3 facilitates the positioning and locking of the guide block 4 located inside the installation opening 2, thereby ensuring the stability of the installation of the guide block 4 and the platform plate 1. In addition, the cross-section of the guide block 4 is T-shaped, and the cross-section of the installation opening 2 is concave, which facilitates the insertion of the guide block 4 and improves the installation effect.

[0042] The negative pressure adsorption component 9 is provided to further improve the positioning of the workpiece on the top of the platform plate 1, and further avoid the deviation problem of the workpiece during the processing.

[0043] Refer to the attached Figure 8-9 The clamping assembly 7 includes a movable frame 72 that slides on the inner side of the movable plate 6, a guide rod 71 that slides inside the movable frame 72, both ends of the guide rod 71 extend to the outside of the movable frame 72, and an L-shaped clamping block 75 is provided on one side of the movable frame 72;

[0044] By sliding the movable frame 72 on one side of the movable plate 6, the lateral movement of the movable plate 6 can indirectly drive the L-shaped clamping block 75 to wrap and clamp the corners of the workpiece, thereby realizing multi-angle fastening of the workpiece, solving the problem of insufficient stability of the workpiece in the prior art by fastening the workpiece on both sides, which makes it easy for the workpiece to deviate during processing.

[0045] Refer to the attached Figure 8-9 The outer surface of the guide rod 71 is fixedly connected to a driving plate 73, and the driving plate 73 is located inside the movable frame 72. A first spring 74 is fixedly connected between the top of the driving plate 73 and the top of the inner wall of the movable frame 72;

[0046] The elastic force of the first spring 74 can squeeze the driving plate 73, causing the driving plate 73 to move downward. The downward movement of the driving plate 73 can drive the guide rod 71 to move downward and insert it into the inclined guide groove 5 at the corresponding position, so that the clamping assembly 7 moves along the inclined angle of the inclined guide groove 5 during the lateral movement, thereby achieving multi-faceted fastening of the workpiece.

[0047] Refer to the attached Figure 8-9 , one side of the movable frame 72 is fixedly connected to a U-shaped block 76, the interior of the U-shaped block 76 is rotatably connected to a rotating shaft 77, and the outer surface of the rotating shaft 77 is fixedly connected to a connecting block 78, and one side of the connecting block 78 is fixedly connected to the outer side of the L-shaped clamping block 75, the top of the rotating shaft 77 extends to the top of the U-shaped block 76, the outer surface of the top of the rotating shaft 77 is fixedly connected to a circular block 79, and the outer surface of the circular block 79 is provided with a number of bayonet holes, and one side of the top of the U-shaped block 76 is slidably connected to a T-shaped metal block 710, and the top of the U-shaped block 76 is fixedly connected to two magnet blocks 711;

[0048] The connecting block 78 is rotatably mounted on the interior of the U-shaped block 76 by a rotating shaft 77, and the connecting block 78 is fixedly connected to the L-shaped clamping block 75, so that the fan-shaped movement of the L-shaped clamping block 75 can realize the fastening of different types of workpieces. Moreover, the rotation of the rotating shaft 77 can drive the circular block 79 to rotate, and the T-shaped metal block 710 is inserted into the bayonet on the outer surface of the circular block 79, thereby clamping the circular block 79, indirectly ensuring the stability of the angle adjustment of the L-shaped clamping block 75. Moreover, the T-shaped metal block 710 is adsorbed by the magnet block 711, further improving the stability of the workpiece fastening.

[0049] The L-shaped clamping block 75 is rotatably arranged to facilitate the operator to change the clamping structure according to the size and type of workpieces, thereby improving the functionality of the clamping structure.

[0050] Refer to the attached Figure 2 and Figure 5 The driving assembly 8 includes a hydraulic telescopic rod 81 fixed to the bottom of the platform plate 1 through a bracket, and a U-shaped frame 82 sliding on both sides of the bottom of the platform plate 1. The tops of the two U-shaped frames 82 are respectively fixed to the bottoms of the two movable plates 6. The telescopic end of the hydraulic telescopic rod 81 is fixedly connected to the lifting plate 83, and both sides of the lifting plate 83 are hinged with a driving frame 84. The other sides of the two driving frames 84 are respectively connected to the inner rotation of the two U-shaped frames 82;

[0051] The hydraulic telescopic rod 81 is connected to the external power supply and control switch, and is used to drive the lifting plate 83 to move up and down. The up and down movement of the lifting plate 83 can drive the two drive frames 84 to drive in a fan-shaped manner, and the fan-shaped movement of the two drive frames 84 can drive the two U-shaped frames 82 to move relative to or apart. The relative or separate movement of the two U-shaped frames 82 can drive the two movable plates 6 to move relative to or apart, and drive the four clamping assemblies 7 to achieve the tightening of the workpiece.

[0052] Refer to the attached Figure 2 , guide rods 85 are fixedly connected to both sides of the top of the base 11, and the two guide rods 85 are slidably connected to the inside of the lifting plate 83;

[0053] The provision of the two guide rods 85 facilitates the smoothness of the up and down sliding of the lifting plate 83, thereby improving the stability of the driving assembly 8 in driving the two moving plates 6 relative to or apart from each other.

[0054] The working principle of the clamping structure of the movable working platform of a hydraulic press proposed by the present invention is as follows:

[0055] S1. Place the block workpiece on the top of the platform plate 1. By starting the hydraulic telescopic rod 81 in the driving assembly 8, the lifting plate 83 can be driven to move up and down. The downward movement of the lifting plate 83 can drive the two driving frames 84 to drive in a fan-shaped manner. The fan-shaped movement of the two driving frames 84 can drive the two U-shaped frames 82 to move relative to each other, and then drive the two movable plates 6 to move relative to or away from each other. The relative movement of the two movable plates 6 can drive the four clamping assemblies 7 to move in the relative directions, thereby achieving the tightening of the workpiece;

[0056] S2. The four clamping assemblies 7 are driven to move in relative directions by the two movable plates 6. The guide rods 71 ​​in the four clamping assemblies 7 are located inside the corresponding inclined guide grooves 5, so that when the four clamping assemblies 7 move in relative directions, the L-shaped clamping blocks 75 in the four clamping assemblies 7 move closer to each other, thereby clamping the four corners of the block-shaped workpiece;

[0057] S3. Place the cylindrical workpiece on top of the platform plate 1 and move one of the clamping assemblies 7 on the two movable plates 6 to the middle position. During the movement, pull the guide rod 71 by hand to move the guide rod 71 out of the inclined guide groove 5. At this time, the position of the clamping assembly 7 can be adjusted longitudinally.

[0058] S4. Remove the T-shaped metal block 710 from the inside of the bayonet. At this time, the L-shaped clamping block 75 can be adjusted forty-five degrees. Then, the T-shaped metal block 710 is inserted into the bayonet at the corresponding position to form a clamp. Finally, the driving assembly 8 drives the two movable plates 6 in relative directions to achieve the tightening of the cylindrical workpiece.

[0059] Example 2: Based on Example 1, the difference is that;

[0060] Refer to the attached Figure 2 and Figure 11 The negative pressure adsorption component 9 includes a negative pressure frame 91 fixed to the inside of the circular opening, and a plurality of negative pressure nozzles 92 are fixedly connected to the top of the negative pressure frame 91, and the plurality of negative pressure nozzles 92 are communicated with the interior of the negative pressure frame 91, and the tops of the plurality of negative pressure nozzles 92 are flush with the height of the top of the platform plate 1, and the tops of the plurality of negative pressure nozzles 92 are installed with sealing rings, and the top of the base 11 is fixedly connected to a suction pump 93, and the suction port of the suction pump 93 is communicated with the interior of the negative pressure frame 91 through a suction pipe;

[0061] The suction pump 93 is connected to the external power supply and control switch, and is used to suck air into the inside of the negative pressure frame 91 through the suction pipe, so that negative pressure is formed inside the negative pressure frame 91, and then the workpiece located on the top of the platform plate 1 is adsorbed and locked through several negative pressure nozzles 92, ensuring the stability of the workpiece during processing, having good positioning function, and avoiding the offset problem during the workpiece processing.

[0062] Example 3: Based on Example 1, the difference is that;

[0063] Refer to the attached Figure 7 The clamping assembly 3 includes a U-shaped frame 31 fixed to the bottom of the platform plate 1, and two L-shaped frames 32 are slidably connected to one side of the inner wall of the U-shaped frame 31. One end of the two L-shaped frames 32 is fixedly connected to a T-shaped clamping block 33. A second spring 34 is fixedly connected between the outer side surfaces of the two T-shaped clamping blocks 33 and the inner wall of the U-shaped frame 31. The bottom of both sides of the guide block 4 is provided with a clamping hole 12;

[0064] Through the elastic force of the second spring 34 itself, the L-shaped frame 32 can be squeezed, so that the two L-shaped frames 32 move in relative directions, and then the two T-shaped clamping blocks 33 can be driven to move in relative directions and inserted into the clamping holes 12 at corresponding positions, thereby clamping the guide block 4 and completing the installation of the guide block 4.

[0065] The other ends of the two L-shaped frames 32 are both configured as inclined surfaces, and an operating rod 35 is slidably connected to one side of the U-shaped frame 31. One end of the operating rod 35 is fixedly connected to a trapezoidal block 36. The two inclined surfaces of the trapezoidal block 36 are slidably connected to the inclined surfaces of the two L-shaped frames 32 respectively.

[0066] The setting of the operating rod 35 makes it easy for the staff to pull the trapezoidal block 36. By pulling the trapezoidal block 36, the two inclined surfaces can be used to squeeze the two L-shaped frames 32, so that the two L-shaped frames 32 move away from each other, which can indirectly control the two T-shaped clamping blocks 33 to move away from each other, so that the T-shaped clamping blocks 33 are removed from the inside of the clamping holes 12 on the guide block 4, losing the clamping of the guide block 4, thereby facilitating the staff to replace the guide block 4, and having good disassembly and assembly functions.

[0067] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0068] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A clamping structure for a movable working platform of a hydraulic press, comprising a platform plate (1) and a base (11), wherein the top of the platform plate (1) is fixed to the top of the base (11) via four pillars, and is characterized in that: Two mounting openings (2) are provided on both sides of the top of the platform plate (1), and guide blocks (4) are detachably installed inside the four mounting openings (2) through clamping assemblies (3), and inclined guide grooves (5) are provided inside the four guide blocks (4). Both sides of the top of the platform plate (1) are slidably connected to movable plates (6), and the inner sides of the two movable plates (6) are slidably connected to two adjustable clamping assemblies (7) for clamping the workpiece, and the clamping assembly (7) includes a guide rod (71) inserted into the inclined guide groove (5). The bottom of the platform plate (1) is provided with a driving assembly (8) for driving the two movable plates (6) relative to or apart. A circular opening is provided on the platform plate (1), and a negative pressure adsorption assembly (9) for adsorbing the bottom of the workpiece is provided inside the circular opening. The front and back sides of the platform plate (1) are provided with a toggle opening (10); The clamping assembly (7) includes a movable frame (72) sliding on the inner side of the movable plate (6), a guide rod (71) sliding inside the movable frame (72), both ends of the guide rod (71) extending to the outside of the movable frame (72), and an L-shaped clamping block (75) is provided on one side of the movable frame (72); the outer surface of the guide rod (71) is fixedly connected to a driving plate (73), and the driving plate (73) is located inside the movable frame (72), and a first spring (74) is fixedly connected between the top of the driving plate (73) and the top of the inner wall of the movable frame (72).

2. The clamping structure of a hydraulic press movable working platform according to claim 1, characterized in that: The driving assembly (8) includes a hydraulic telescopic rod (81) fixed to the bottom of the platform plate (1) through a bracket, and a U-shaped frame (82) sliding on both sides of the bottom of the platform plate (1), the tops of the two U-shaped frames (82) are respectively fixed to the bottoms of the two movable plates (6), the telescopic end of the hydraulic telescopic rod (81) is fixedly connected to the lifting plate (83), and the two sides of the lifting plate (83) are hinged with a driving frame (84), and the other sides of the two driving frames (84) are respectively connected to the inside of the two U-shaped frames (82) for rotation.

3. The clamping structure of a hydraulic press movable working platform according to claim 2, characterized in that: Both sides of the top of the base (11) are fixedly connected with guide rods (85), and the two guide rods (85) are slidably connected to the inside of the lifting plate (83).

4. The clamping structure for a movable working platform of a hydraulic press according to claim 1, characterized in that: The negative pressure adsorption component (9) includes a negative pressure frame (91) fixed inside the circular opening, a plurality of negative pressure nozzles (92) are fixedly connected to the top of the negative pressure frame (91), and the plurality of negative pressure nozzles (92) are all communicated with the interior of the negative pressure frame (91), the tops of the plurality of negative pressure nozzles (92) are all flush with the height of the top of the platform plate (1), and the tops of the plurality of negative pressure nozzles (92) are all installed with sealing rings, and a suction pump (93) is fixedly connected to the top of the base (11), and the suction port of the suction pump (93) is communicated with the interior of the negative pressure frame (91) through a suction pipe.

5. The clamping structure of a movable working platform of a hydraulic press according to claim 1, characterized in that: The clamping assembly (3) comprises a U-shaped frame (31) fixed to the bottom of the platform plate (1), two L-shaped frames (32) are slidably connected to one side of the inner wall of the U-shaped frame (31), one end of the two L-shaped frames (32) is fixedly connected to a T-shaped clamping block (33), and a second spring (34) is fixedly connected between the outer side surfaces of the two T-shaped clamping blocks (33) and the inner wall of the U-shaped frame (31), and clamping holes (12) are provided at the bottom of both sides of the guide block (4).

6. The clamping structure of a movable working platform of a hydraulic press according to claim 5, characterized in that: The other ends of the two L-shaped frames (32) are both arranged as inclined surfaces, and one side of the U-shaped frame (31) is slidably connected to an operating rod (35), one end of the operating rod (35) is fixedly connected to a trapezoidal block (36), and the two inclined surfaces of the trapezoidal block (36) are respectively slidably connected to the inclined surfaces of the two L-shaped frames (32).

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