CN114473593A

CN114473593A - Pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions

Info

Publication number: CN114473593A
Application number: CN202210350179.8A
Authority: CN
Inventors: 田启泉; 符杰
Original assignee: Wuhan Shenglongding Technology Co ltd
Current assignee: Wuhan Shenglongding Technology Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-05-13
Anticipated expiration: 2042-04-02
Also published as: CN114473593B

Abstract

The invention discloses a pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions, which relates to the technical field of clamps and comprises a base, a transmission case, a power assembly and a pressure arm, wherein the left end of the pressure arm is provided with an adjusting plate, the height of the adjusting plate can be adjusted according to the thickness of a part to be processed before the part is placed on a processing table, so that the part can be conveniently placed between the processing table and a pressure head, a cushion plate is not required to be repeatedly added or reduced at the bottom of a clamp device, the operation flow is simpler, the working efficiency is greatly improved, hydraulic oil jacks up a movable blocking plate through a first hydraulic oil through hole on a fixed blocking plate, so that the hydraulic oil can enter the bottom of a piston through a second hydraulic oil through hole on a movable group partition plate, the piston is jacked up by the hydraulic oil, and when the oil supply in a hydraulic oil tank is stopped, the movable blocking plate is pulled back to the original position by a return spring, and a closed state is formed between the piston and the hydraulic oil tank, so that the effect of continuously jacking the piston is achieved.

Description

Pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions

Technical Field

The invention relates to the technical field of clamps, in particular to a pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions.

Background

The jig is a device for fixing a processing object to occupy a correct position for receiving construction or inspection in a machine manufacturing process, and is also called a jig. In a broad sense, any device used to quickly, conveniently and safely mount a workpiece at any stage in a process may be referred to as a jig. Such as welding jigs, inspection jigs, assembly jigs, machine tool jigs, and the like. Of which the machine tool clamps are the most common, often referred to simply as clamps. The hydraulic clamp is a clamp which uses a hydraulic element to replace a mechanical part and realizes automatic positioning, supporting and clamping of a workpiece through hydraulic control. The clamping device has the advantages of large clamping force, reliable clamping, stable work, convenience in use and the like, and is widely applied to scenes such as numerical control machines, machining centers, automatic production lines and the like at present. The desired fixture is obtained by assembling the selected hydraulic components with the designed mechanical parts.

But place before the processing platform at the part, treat that the thickness specification of processing part differs, can't directly place between anchor clamps and operation panel, need add or reduce the placing that the backing plate just can realize the part repeatedly in fixture device's bottom, the operation process is loaded down with trivial details, consuming time and wasting power, greatly reduced work efficiency, and the easy cracked condition that takes place of hydraulic pressure oil pipe under high pressure operating mode, and the fracture of hydraulic pressure oil pipe causes anchor clamps easily and loses the power supply and loses the spacing of treating the processing part, not only seriously influence the machining precision of part, and lose the incident of taking place easily under spacing condition at the part.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions, which solves the problems that parts to be machined are different in thickness specification and cannot be directly placed between a clamp and an operation table, the working efficiency is reduced, a hydraulic oil pipe is easy to break under a high-pressure working condition, the clamp loses a power source and loses the limit of the parts to be machined due to the fact that the hydraulic oil pipe breaks, the machining precision of the parts is seriously influenced, and safety accidents are easy to happen under the condition that the parts lose the limit.

In order to achieve the purpose, the invention is realized by the following technical scheme: a pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions comprises a base, a transmission case, a power assembly and a pressure arm, wherein a mounting groove is formed in one side of the top of the base, the transmission case is fixedly arranged inside the mounting groove, the power assembly is fixedly arranged inside the transmission case, the pressure arm is arranged at the top of the base, a top block is fixedly arranged at the top of the power assembly, an adjusting sleeve is fixedly arranged at the left end of the pressure arm, a limiting clamp is arranged on the left side wall of the adjusting sleeve, an adjusting plate is movably arranged inside the adjusting sleeve, a pressing block is fixedly arranged at the bottom end of the adjusting plate, a protective pad is fixedly arranged at the bottom of the pressing block, a plurality of first adjusting holes are formed in the surface of the adjusting plate, a second adjusting hole is formed in the outer wall of the adjusting sleeve, and a hydraulic oil connecting nozzle is fixedly arranged on the front of the transmission case, the equal fixedly connected with rotating turret in both sides around the top of base, and the equal fixedly connected with location foot in four turnings in bottom of base.

The power component comprises a hydraulic oil tank, a PLC (programmable logic controller) is fixedly arranged on one side of the outer wall of the hydraulic oil tank, an oil inlet nozzle is fixedly arranged on the other side of the outer wall of the hydraulic oil tank, the oil inlet nozzle is communicated with the inside of the hydraulic oil tank, a sealing cover is fixedly connected to the top of the hydraulic oil tank through a bolt, a movable hole is formed in the middle of the top of the sealing cover, an adjusting component is arranged inside the hydraulic oil tank, a piston is arranged on the inner wall of the hydraulic oil tank in a sliding mode, an ejector pin is fixedly arranged on the top end of the piston, and the top end of the ejector pin penetrates through the movable hole and extends to the outside.

The adjusting part comprises a fixed blocking block and a movable blocking block, the top center of the fixed blocking block is provided with a spring storage groove, the spring storage groove is fixedly provided with a reset spring, the top of the fixed blocking block is respectively provided with a plurality of first hydraulic oil through holes and a storage groove, the top of the fixed blocking block is fixedly provided with a plurality of first plungers and limiting posts, the bottom of the movable blocking block is fixedly connected with a plurality of electromagnets, the bottom of the movable blocking block is provided with a plurality of second hydraulic oil through holes and limiting holes, and the bottom of the movable blocking block is fixedly provided with a plurality of second plungers.

Furthermore, the pressure arm is rotatably connected between the opposite side walls of the two rotating frames through a rotating shaft, the right end of the pressure arm is rotatably connected with the ejector block, and the ejector block is fixedly connected to the top end of the ejector pin.

Furthermore, the draw groove has been seted up at the top of spacing card, and the equal fixedly connected with spacing post in both sides around the right side wall of spacing card.

Furthermore, the first adjusting holes and the second adjusting holes are distributed in a linear array mode, the outer diameter of the limiting column is matched with the inner diameters of the first adjusting holes and the second adjusting holes, and the positions of the limiting column correspond to the positions of the first adjusting holes and the second adjusting holes one to one.

Further, fixed barrier block fixed connection is in hydraulic tank's inside, activity barrier block sliding connection is in hydraulic tank's inside, the quantity of first hydraulic oil clearing hole is the same with the second plunger, and the internal diameter of first hydraulic oil clearing hole and the external diameter looks adaptation of second plunger, and the position one-to-one.

Furthermore, the number of the first plungers is the same as that of the second hydraulic oil through holes, the outer diameters of the first plungers are matched with the inner diameters of the second hydraulic oil through holes, and the positions of the first plungers correspond to those of the second hydraulic oil through holes one by one.

Furthermore, the electromagnet is connected with the PLC through a wire, a permanent magnet is fixedly arranged at the bottom of the accommodating groove, the inner structure of the accommodating groove is matched with the electromagnet, and when the electromagnet is electrified, the permanent magnet and the electromagnet repel each other in magnetic property.

Furthermore, the top of spacing post is all fixed and is provided with limit stop, the clearing hole has been seted up to the inner wall in spacing hole, the internal diameter and the spacing post external diameter looks adaptation of clearing hole, the internal diameter and the external diameter looks adaptation of limit stop in spacing hole.

Advantageous effects

The invention provides a pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions. Compared with the prior art, the method has the following beneficial effects:

1. a pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions comprises a base, a transmission case, a power assembly and a pressure arm, wherein a mounting groove is formed in one side of the top of the base, the transmission case is fixedly arranged inside the mounting groove, the power assembly is fixedly arranged inside the transmission case, the pressure arm is arranged at the top of the base, a top block is fixedly arranged at the top of the power assembly, an adjusting sleeve is fixedly arranged at the left end of the pressure arm, a limiting clamp is arranged on the left side wall of the adjusting sleeve, an adjusting plate is movably arranged inside the adjusting sleeve, a pressing block is fixedly arranged at the bottom end of the adjusting plate, a protective pad is fixedly arranged at the bottom of the pressing block, a plurality of first adjusting holes are formed in the surface of the adjusting plate, a second adjusting hole is formed in the outer wall of the adjusting sleeve, a hydraulic oil connecting nozzle is fixedly arranged on the front side of the transmission case, rotating frames are fixedly connected to the front side and the rear side of the top of the base, and positioning feet are fixedly connected to four corners of the bottom of the base, the device utilizes lever principle when using, thereby upwards promote the pressure arm through power component and make its left end push down, reach the purpose that will press from both sides tight part, and the left end of pressure arm is provided with the regulating plate in addition, place before the processing platform at the part, can be according to the height of the thickness adjustment regulating plate of waiting to process the part, thereby be convenient for place the part between processing platform and pressure head, need not to add or reduce the backing plate in fixture device's bottom repeatedly, make the operation flow simpler, and the work efficiency is greatly improved.

2. A pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions comprises a hydraulic oil tank, a PLC controller is fixedly arranged on one side of the outer wall of the hydraulic oil tank, an oil inlet nozzle is fixedly arranged on the other side of the outer wall of the hydraulic oil tank and communicated with the inside of the hydraulic oil tank, a sealing cover is fixedly connected to the top of the hydraulic oil tank through a bolt, a movable hole is formed in the middle of the top of the sealing cover, an adjusting assembly is arranged inside the hydraulic oil tank, the top end of the adjusting assembly penetrates through the movable hole and extends to the outside, when the clamp device works, hydraulic oil jacks up a movable barrier plate through a first hydraulic oil through hole in a fixed barrier plate, so that the hydraulic oil can enter the bottom of a piston through a second hydraulic oil through hole in a movable group barrier plate, the piston is jacked up by the hydraulic oil, an ejector pin can jack up an ejector block, and when oil supply stops in the hydraulic oil tank, the movable blocking plate is pulled back to the original position by the reset spring, a closed state is formed between the piston and the hydraulic oil tank, the fixed combination plate and the movable blocking plate are mutually matched, so that hydraulic oil at the bottom of the piston cannot return, the effect of continuously jacking the piston is achieved, therefore, when the external oil pipe is accidentally broken, the working state inside the power assembly is not influenced, and the situation that the clamp loses the clamping effect under an accidental condition is avoided.

3. A pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions comprises an adjusting assembly, a fixed blocking block and a movable blocking block, wherein a spring accommodating groove is formed in the center of the top of the fixed blocking block, a reset spring is fixedly arranged inside the spring accommodating groove, a plurality of first hydraulic oil through holes and accommodating grooves are respectively formed in the top of the fixed blocking block, a plurality of first plungers and limiting columns are fixedly arranged on the top of the fixed blocking block, a plurality of electromagnets are fixedly connected to the bottom of the movable blocking block, a plurality of second hydraulic oil through holes and limiting holes are formed in the bottom of the movable blocking block, a plurality of second plungers are fixedly arranged at the bottom of the movable blocking block, and when the limiting effect of the clamp on a part is relieved, the electromagnets on the movable blocking plate are electrified to enable the movable blocking plate to have magnetism which is repelled from the magnetism of permanent magnets on the fixed blocking plate, so that the movable blocking plate is separated from the fixed blocking plate again under the action of the magnetism, oil in the hydraulic oil tank can be taken out by the oil pump, is convenient for remove the limiting displacement of pressure arm to the part fast, and this anchor clamps can enough realize lasting pressurize's purpose, can make its limiting displacement who removes anchor clamps fast again, is favorable to using widely on a large scale.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic exploded perspective view of the present invention;

FIG. 3 is a perspective view of the power assembly of the present invention;

FIG. 4 is an exploded perspective view of the power assembly of the present invention;

fig. 5 is an exploded perspective view of the conditioning assembly of the present invention.

In the figure: 1. a base; 2. a transmission case; 3. a power assembly; 301. a hydraulic oil tank; 302. a PLC controller; 303. an oil inlet nozzle; 304. a sealing cover; 305. a movable hole; 306. an adjustment assembly; 3061. fixing the blocking block; 3062. a movable block; 3063. a spring receiving groove; 3064. a return spring; 3065. the first hydraulic oil passing hole; 3066. a receiving groove; 3067. a first plunger; 3068. a limiting column; 3069. an electromagnet; 30610. a second hydraulic oil passing hole; 30611. a second plunger; 30612. a limiting hole; 307. a thimble; 308. a piston; 4. a pressure arm; 5. a top block; 6. an adjusting sleeve; 7. a limiting card; 8. an adjusting plate; 9. briquetting; 10. a protective pad; 11. a first adjustment aperture; 12. a second adjustment aperture; 13. a hydraulic oil connecting nozzle; 14. a rotating frame; 15. and a positioning foot.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions comprises a base 1, a transmission case 2, a power assembly 3 and a pressure arm 4, wherein one side of the top of the base 1 is provided with a mounting groove, the transmission case 2 is fixedly arranged inside the mounting groove, the power assembly 3 is fixedly arranged inside the transmission case 2, the pressure arm 4 is arranged at the top of the base 1, the top of the power assembly 3 is fixedly provided with a top block 5, the left end of the pressure arm 4 is fixedly provided with an adjusting sleeve 6, the left side wall of the adjusting sleeve 6 is provided with a limiting clamp 7, the inside of the adjusting sleeve 6 is movably provided with an adjusting plate 8, the bottom end of the adjusting plate 8 is fixedly provided with a pressing block 9, the bottom of the pressing block 9 is fixedly provided with a protective pad 10, the surface of the adjusting plate 8 is provided with a plurality of first adjusting holes 11, the outer wall of the adjusting sleeve 6 is provided with second adjusting holes 12, the front of the transmission case 2 is fixedly provided with a hydraulic oil connecting nozzle 13, the front side and the rear side of the top of the base 1 are fixedly connected with rotating frames 14, four corners of the bottom of the base 1 are fixedly connected with positioning pins 15, the power component 3 comprises a hydraulic oil tank 301, one side of the outer wall of the hydraulic oil tank 301 is fixedly provided with a PLC 302, the other side of the outer wall of the hydraulic oil tank 301 is fixedly provided with an oil inlet 303, the oil inlet 303 is communicated with the inside of the hydraulic oil tank 301, the top of the hydraulic oil tank 301 is fixedly connected with a sealing cover 304 through bolts, the middle position of the top of the sealing cover 304 is provided with a movable hole 305, the inside of the hydraulic oil tank 301 is provided with an adjusting component 306, the inner wall of the hydraulic oil tank is provided with a piston 308 in a sliding manner, the top end of the piston 308 is fixedly provided with a thimble 307, the top end of the thimble 307 penetrates through the movable hole 305 and extends to the outside, the adjusting component 306 comprises a fixed blocking block 3061 and a movable blocking block 3062, the center position of the top of the fixed blocking block 3061 is provided with a spring accommodating groove 3063, a return spring 3064 is fixedly arranged inside the spring accommodating groove 3063, a plurality of first hydraulic oil passing holes 3065 and accommodating grooves 3066 are respectively arranged at the top of the fixed blocking block 3061, a plurality of first plungers 3067 and limiting columns 3068 are fixedly arranged at the top of the fixed blocking block 3061, a plurality of electromagnets 3069 are fixedly connected at the bottom of the movable blocking block 3062, a plurality of second hydraulic oil passing holes 30610 and limiting holes 30612 are arranged at the bottom of the movable blocking block 3062, a plurality of second plungers 30611 are fixedly arranged at the bottom of the movable blocking block 3062, the pressure arm 4 is rotatably connected between opposite side walls of the two rotating frames 14 through a rotating shaft, the right end of the pressure arm 4 is rotatably connected with the top block 5, the top block 5 is fixedly connected at the top end of the ejector pin 307, a pull groove is arranged at the top of the limiting card 7, the front side and the rear side of the right side wall of the limiting card 7 are both fixedly connected with limiting columns, the first adjusting holes 11 and the second adjusting holes 12 are distributed in a linear array, the outer diameter of the limiting column is matched with the inner diameters of the first adjusting hole 11 and the second adjusting hole 12, the positions of the limiting column correspond to one another, the fixed blocking block 3061 is fixedly connected inside the hydraulic oil tank 301, the movable blocking block 3062 is slidably connected inside the hydraulic oil tank 301, the number of the first hydraulic oil passing holes 3065 is the same as that of the second plunger 30611, the inner diameter of the first hydraulic oil passing holes 3065 is matched with the outer diameter of the second plunger 30611, the positions of the first hydraulic oil passing holes 3067 correspond to that of the second hydraulic oil passing holes 30610, the number of the first plunger 3067 is the same as that of the second hydraulic oil passing holes 30610, the outer diameter of the first plunger 3067 is matched with the inner diameter of the second hydraulic oil passing holes 30610, the positions of the first hydraulic oil passing holes 3069 correspond to one another, the electromagnets 3069 are connected with the PLC 302 through a lead wire, the bottom of the accommodating groove 3066 is fixedly provided with a permanent magnet, the inner structure of the accommodating groove 3066 is matched with the electromagnet 3069, when the electromagnet is electrified, the permanent electromagnet is magnetically repelled by the electromagnet 3069, the top ends of the limit posts 3068 are fixedly provided with limit stops, the inner walls of the limit holes 30612 are provided with through holes, the inner diameters of the through holes are matched with the outer diameters of the limit posts 3068, and the inner diameters of the limit holes 30612 are matched with the outer diameters of the limit stops.

When in use, firstly, the adjusting plate is adjusted according to the thickness of a part to be processed, when in adjustment, the limiting clamp 7 is detached, then the adjusting plate is pushed upwards along the inner wall of the adjusting sleeve 6, so that the height of the bottom of the pressing block 9 and the height of the processing platform are larger than the thickness of the part to be processed, then the limiting clamp 7 is inserted into the second adjusting hole 12 and the first adjusting hole 11 again, so that the position of the adjusting plate 8 is fixed, then, the pressure arm 4 pushes the pressure arm 4 upwards through the power assembly by utilizing the lever principle, so that the left end of the pressure arm is pressed downwards, so that the part to be processed is pressed tightly by the pressing block 9, when the clamp device works, the external hydraulic oil pipe is connected with the hydraulic oil connecting nozzle 13, as the hydraulic oil tank 301 is communicated with the hydraulic oil, the hydraulic oil is input into the hydraulic oil tank 301 through the power pump, the movable blocking block 3062 is jacked up through the first through the holes 3065 on the fixed blocking block 3061, the first plunger 3067 and the second plunger 30611 are separated from the first hydraulic oil passing hole 3065 and the second hydraulic oil passing hole 30610, so that hydraulic oil can enter the bottom of the piston 308 through the second hydraulic oil passing hole 30610 on the movable blocking block 3062, the piston 308 is lifted by the hydraulic oil, the ejector pin 307 can play a role of jacking the ejector block 5, when the oil supply in the hydraulic oil tank 301 is stopped, the movable blocking block 3062 is pulled back to the original position by the reset spring 3064, the fixed blocking block 3061 is matched with the movable blocking block 3062, the first plunger 3067 and the second plunger 30611 enter the first hydraulic oil passing hole 5 and the second hydraulic oil passing hole 30610 again, so that the hydraulic oil at the bottom of the piston 308 cannot return to achieve the effect of continuously lifting the piston, therefore, when the external is accidentally broken, the working state in the power assembly 3 is not influenced, when the limit effect of the clamp on the part is released, the electromagnet 3069 on the movable blocking block 3062 is electrified to be magnetic, and the electromagnet is magnetically repelled with the permanent magnet on the fixed blocking block 3061, so that the movable blocking block 3062 is separated from the fixed blocking block 3061 again under the action of magnetic force, oil in the hydraulic oil tank 301 can be pumped out by the oil pump, the piston slides downwards along the inner wall of the hydraulic oil tank 301, and the pressing block 9 is contacted to limit the part.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a from pneumatic hydraulic fixture of taking pressure boost locking and pressurize function, includes base (1), transmission case (2), power component (3) and pressure arm (4), the mounting groove has been seted up to top one side of base (1), and the inside of mounting groove is fixed and is provided with transmission case (2), the inside of transmission case (2) is fixed and is provided with power component (3), pressure arm (4) set up at the top of base (1), its characterized in that: the top of the power component (3) is fixedly provided with a top block (5), the left end of the pressure arm (4) is fixedly provided with an adjusting sleeve (6), the left side wall of the adjusting sleeve (6) is provided with a limit clamp (7), an adjusting plate (8) is movably arranged in the adjusting sleeve (6), a pressing block (9) is fixedly arranged at the bottom end of the adjusting plate (8), a protective pad (10) is fixedly arranged at the bottom of the pressing block (9), a plurality of first adjusting holes (11) are formed in the surface of the adjusting plate (8), a second adjusting hole (12) is arranged on the outer wall of the adjusting sleeve (6), a hydraulic oil connecting nozzle (13) is fixedly arranged on the front surface of the transmission case (2), the front side and the rear side of the top of the base (1) are both fixedly connected with rotating frames (14), and four corners at the bottom of the base (1) are fixedly connected with positioning pins (15);

the power assembly (3) comprises a hydraulic oil tank (301), a PLC (programmable logic controller) is fixedly arranged on one side of the outer wall of the hydraulic oil tank (301), an oil inlet nozzle (303) is fixedly arranged on the other side of the outer wall of the hydraulic oil tank (301), the oil inlet nozzle (303) is communicated with the interior of the hydraulic oil tank (301), the top of the hydraulic oil tank (301) is fixedly connected with a sealing cover (304) through a bolt, a movable hole (305) is formed in the middle of the top of the sealing cover (304), an adjusting assembly (306) is arranged in the hydraulic oil tank (301), a piston (308) is slidably arranged on the inner wall of the hydraulic oil tank, a thimble (307) is fixedly arranged at the top end of the piston (308), and the top end of the thimble (307) penetrates through the movable hole (305) and extends to the outside;

the adjusting assembly (306) comprises a fixed blocking block (3061) and a movable blocking block (3062), a spring accommodating groove (3063) is formed in the center of the top of the fixed blocking block (3061), a reset spring (3064) is fixedly arranged inside the spring accommodating groove (3063), a plurality of first hydraulic oil passing holes (3065) and a plurality of first hydraulic oil accommodating grooves (3066) are respectively formed in the top of the fixed blocking block (3061), a plurality of first plungers (3067) and a limiting column (3068) are fixedly arranged on the top of the fixed blocking block (3061), a plurality of electromagnets (3069) are fixedly connected to the bottom of the movable blocking block (3062), a plurality of second hydraulic oil passing holes (30610) and a plurality of limiting holes (30612) are formed in the bottom of the movable blocking block (3062), and a plurality of second plungers (30611) are fixedly arranged at the bottom of the movable blocking block (3062).

2. The pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions of claim 1, wherein: the pressure arm (4) is rotatably connected between the opposite side walls of the two rotating frames (14) through a rotating shaft, the right end of the pressure arm (4) is rotatably connected with the ejector block (5), and the ejector block (5) is fixedly connected to the top end of the ejector pin (307).

3. The pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions of claim 1, wherein: the top of the limiting clamp (7) is provided with a pull groove, and the front side wall and the rear side wall of the limiting clamp (7) are fixedly connected with limiting columns.

4. The pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions of claim 3, wherein: the first adjusting holes (11) and the second adjusting holes (12) are distributed in a linear array mode, the outer diameter of each limiting column is matched with the inner diameters of the first adjusting holes (11) and the second adjusting holes (12), and the positions of the limiting columns correspond to the positions of the first adjusting holes and the second adjusting holes one to one.

5. The pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions of claim 1, wherein: the fixed blocking block (3061) is fixedly connected inside the hydraulic oil tank (301), the movable blocking block (3062) is connected inside the hydraulic oil tank (301) in a sliding mode, the number of the first hydraulic oil passing holes (3065) is the same as that of the second plunger (30611), the inner diameter of the first hydraulic oil passing holes (3065) is matched with the outer diameter of the second plunger (30611), and the positions of the first hydraulic oil passing holes (3065) and the positions of the second plunger (30611) are in one-to-one correspondence.

6. The pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions of claim 1, wherein: the number of the first plungers (3067) is the same as that of the second hydraulic oil passing holes (30610), and the outer diameters of the first plungers (3067) are matched with the inner diameters of the second hydraulic oil passing holes (30610) and the positions are in one-to-one correspondence.

7. The pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions of claim 1, wherein: the electromagnet (3069) is connected with the PLC (302) through a lead, a permanent magnet is fixedly arranged at the bottom of the accommodating groove (3066), the internal structure of the accommodating groove (3066) is matched with the electromagnet (3069), and when the electromagnet (3069) is electrified, the permanent magnet and the electromagnet (3069) repel magnetically.

8. The pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions of claim 1, wherein: the top end of the limit column (3068) is fixedly provided with a limit stop, the inner wall of the limit hole (30612) is provided with a through hole, the inner diameter of the through hole is matched with the outer diameter of the limit column (3068), and the inner diameter of the limit hole (30612) is matched with the outer diameter of the limit stop.