Hydraulic nail claw type turning clamp

Abstract

The utility model discloses a hydraulic nail claw type turning clamp, which relates to the technical field of clamps, and comprises a base, a support rod is arranged on the base, a top plate is arranged at the top end of the support rod, a movable plate capable of sliding along the support rod is arranged below the top plate, the movable plate is connected with a hydraulic cylinder arranged on the base, and a plurality of claw rods penetrating through the top plate are arranged on the movable plate. And the top end of the claw rod is provided with a position-adjustable clamping claw. According to the fixture, the outer side of the top of a workpiece can be fixed in multiple positions, the stability of the workpiece during clamping is improved, and the problem that a fixture in the prior art is inconvenient to stably fix the workpiece in multiple positions is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a hydraulic nail claw type lathe clamp. Background Art

[0002] A hydraulic nail claw type turning fixture is a fixture used on CNC lathes. The clamping and loosening states of the fixture can be controlled by hydraulic components to achieve clamping or loosening of the workpiece. It is widely used in the turning process of the workpiece. However, when the hydraulic nail claw type turning fixture is actually used to clamp and fix the workpiece, the number of clamping claws inside the fixture is generally small. During the clamping process of the workpiece, the fixed position of the workpiece is limited and the stability is poor. At the same time, the position of the clamping claw cannot be adjusted, so it is not convenient to stably fix the workpiece in multiple positions. The patent document with the publication date of April 6, 2018 and the publication number of CN107877225A discloses a special pneumatic clamp, which belongs to the field of mechanical technology. It aims to solve the problem that it is inconvenient to clamp the workpiece with the existing pneumatic clamp. This special pneumatic clamp includes a base with a workbench provided on the base. The outer end surface of the workbench is used for the workpiece to rest against the positioning surface. Pull rod 1 and pull rod 2 are vertically provided on both sides of the workbench. The workbench is provided with a cylinder that drives pull rod 1 and pull rod 2 to synchronously reciprocate axially. The outer end of pull rod 1 is provided with a pressure block. One end of the pressure block is hinged to the outer end of pull rod 1, and the other end of the pressure block is provided with a groove for pull rod 2 to be embedded. Pull rod 2 is embedded in the groove and can push the pressure block to move inward. However, the pressure block of the special pneumatic clamp adopts an integral structure and cannot be adjusted separately, which is not convenient for multi-position stable fixation of the workpiece. Therefore, a new type of hydraulic nail claw lathe clamp is proposed to solve the above-mentioned shortcomings. Utility Model Content

[0003] The purpose of the utility model is to provide a hydraulic nail claw type lathe clamp to solve the problem in the above background technology that it is inconvenient to stably fix the workpiece in multiple positions.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is a hydraulic nail claw type lathe clamp, comprising a base, a support rod provided on the base, a top plate provided at the top of the support rod, a movable plate slidable along the support rod provided below the top plate, the movable plate being connected to a hydraulic cylinder provided on the base, the movable plate being provided with a plurality of claw rods passing through the top plate, and the tops of the claw rods being provided with position-adjustable clamping claws. The present invention is provided with a plurality of claw rods passing through the top plate on the movable plate, and the tops of the claw rods are provided with position-adjustable clamping claws. Compared with the hydraulic nail claws of the prior art, the present invention has the advantages of a large number of clamping claws and adjustable positions, and can fix the outer side of the top of the workpiece in multiple positions, thereby improving the stability of the workpiece during clamping, and solving the problem of inconvenience in stably fixing the workpiece in multiple positions raised in the background art.

[0005] Preferably, an adjustment screw hole is provided at the top of the claw rod, a driving rod is screwed onto the adjustment screw hole, a guide rod parallel to the driving rod is fixed to the side of the clamping jaw close to the claw rod, a corresponding guide rod hole is provided on the claw rod, and the driving rod passes through the adjustment screw hole and its front end is movably connected to the clamping jaw. By using the adjustment screw hole and the driving rod provided at the top of the claw rod, in conjunction with the guide rod on the clamping jaw, the driving rod can be rotated on the claw rod when the clamp is in use. The driving rod rotates within the adjustment screw hole and simultaneously drives the clamping jaw to move inward. By adjusting the position of the clamping jaw, workpieces of different widths can be conveniently fixed on the clamp for use.

[0006] Preferably, the front end of the drive rod is provided with a cylinder, and the clamping jaws are provided with a corresponding cylindrical hole adapted to fit the cylinder. The front end of the drive rod is rotatably connected to the cylindrical hole in the clamping jaws via the cylinder. The cylinder provided at the front end of the drive rod extends into the clamping jaws, thereby increasing the clamping force that the clamping jaws can withstand and ensuring that the clamping jaws secure the workpiece.

[0007] Preferably, the top plate is circular, and an open groove is provided on the outer periphery of the top plate. The claw rod is slidably disposed within the open groove, and the clamping claw is disposed on a side of the claw rod near the center of the top plate. The claw rod of the present invention has a rectangular cross-section, so providing an open groove on the outer periphery of the top plate for inserting the claw rod facilitates processing.

[0008] Preferably, a slider is fixed to the lower end of the claw rod near the center of the top plate, and a slide groove is provided on the corresponding side of the open groove. The slider has a T-shaped cross section, and the slide groove is a T-slot. The T-shaped slider cooperates with the T-shaped slide groove to ensure the sliding and stable position of the claw rod.

[0009] Preferably, a screw is provided at the bottom end of the claw rod, and a socket adapted for the screw is provided on the movable plate. The claw rod is secured to the movable plate via a fixing nut below the movable plate. The screw and fixing nut cooperate to secure the claw rod. Furthermore, the height of the claw rod can be fine-tuned by adding or removing shims, thereby fine-tuning the height of the clamping jaws and enabling adjustment of the jaws' separation, facilitating stable fixation of workpieces in multiple positions.

[0010] The top plate has 6-9 openings on its outer side, evenly distributed in a circular pattern. The receptacles on the movable plate correspond to the openings. The utility model has a large number of claws and clamps, allowing for multi-position fixation of the top outer side of a workpiece, thereby improving stability during workpiece clamping.

[0011] Preferably, the base is a hollow columnar body, the hydraulic cylinder is arranged in the base, and there are 2-3 support rods fixed on the outer periphery of the top end of the base.

[0012] Preferably, a hydraulic cylinder is arranged on the upper part of the base, and an output shaft of the hydraulic cylinder is fixedly connected to the center of the movable plate. The hydraulic cylinder pushes the movable plate up and down, and is used for the clamping claws to clamp or release the workpiece.

[0013] Preferably, a mounting base is fixed under the base, with mounting slots formed on either side of the mounting base, and mounting bolts disposed within the mounting slots. When the hydraulic nail claw type car clamp is installed and used, the mounting base can be directly placed in the installation position and secured with the mounting bolts. After the clamp is installed, the mounting bolts can be loosened and the clamp can be moved left and right using the mounting slots to adjust its position for use.

[0014] The beneficial effect of the present invention is that it effectively solves the problem that when the hydraulic nail claw type lathe clamp in the prior art is used to clamp and fix the workpiece, the number of claws inside the clamp is small, the fixing position of the workpiece is limited during the clamping process, the stability is poor, and the position of the claws cannot be adjusted, so it is not convenient to stably fix the workpiece in multiple positions. The hydraulic nail claw type lathe clamp of the present invention has a large number of claws and the position can be adjusted, so the workpiece can be stably fixed in multiple positions, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a front cross-sectional structure of the present utility model.

[0016] Figure 2 This is a schematic diagram of the top plate of the utility model from a top view.

[0017] Figure 3 The figure is a schematic top view of the movable plate of the utility model.

[0018] Figure 4 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0019] Figure 5 The figure is a schematic diagram of a top view of the installation base plate of the utility model.

[0020] In the figure: 1. Mounting base plate; 2. Base; 3. Hydraulic cylinder; 4. Support rod; 5. Movable plate; 6. Top plate; 7. Clamping jaw; 8. Claw rod; 9. Opening slot; 10. Socket; 11. Screw rod; 12. Fixing nut; 13. Mounting bolt; 14. Slide groove; 15. Slider; 16. Adjusting screw hole; 17. Drive rod; 18. Guide rod; 19. Mounting slot; 20. Connecting gasket; 21. Cylinder; 22. Cylindrical hole; 23. Support rod hole. DETAILED DESCRIPTION

[0021] The specific implementation of the technical solution of the utility model will be further described below through examples and in conjunction with the accompanying drawings.

[0022] Example

[0023] See also Figure 1-Figure 5 A hydraulic nail claw type lathe clamp includes a base 2, a support rod 4 is provided on the base 2, a top plate 6 is provided at the top of the support rod, and a movable plate 5 that can slide along the support rod 4 is provided below the top plate. The movable plate 5 is connected to a hydraulic cylinder 3 provided on the base 2. The movable plate 5 is provided with a plurality of claw rods 8 that pass through the top plate, and the top of the claw rod 8 is provided with a position-adjustable clamping claw 7. The base 2 is the basic component of the entire clamp, used to fix and support other components. A support rod 4 is provided on the base to support the top plate 6 and limit the movable plate 5. The function of the support rod is to support the top plate and enable the movable plate to slide up and down. A top plate 6 is fixed to the top of the support rod 4, securing the workpiece and enabling the claw rods 8 to be raised and lowered. A movable plate 5 can slide on the support rod 4 and is equipped with multiple claw rods 8 that extend through the top plate. The movable plate is connected to a hydraulic cylinder 3, which drives the movable plate and claw rods up and down to clamp or release the workpiece. The hydraulic cylinder 3 is fixed to the base 2 and uses a hydraulic system to power the movable plate 5 and claw rods 8, thereby achieving the clamping or release operation. The claw rods 8 extend through the top plate 6 and are equipped with adjustable jaws 7 at their tops. The jaws transmit the hydraulic cylinder's power to drive the jaws up and down. The jaws 7 are located at the tops of the claw rods 8 to clamp or release the workpiece. The adjustable jaw position of the present utility model can accommodate workpieces of different sizes and shapes. The utility model realizes efficient and precise clamping of the workpiece by introducing a hydraulic system and adjustable clamping jaws. Compared with the hydraulic nailing jaws in the prior art, the utility model has the advantages of a large number of clamping jaws and adjustable positions, which is convenient for stably fixing the workpiece in multiple positions, and solves the problem of inconvenience in stably fixing the workpiece in multiple positions raised in the background technology.

[0024] As a preferred embodiment, an adjusting screw hole 16 is provided at the top of the claw rod 8, and a driving rod 17 is screwed on the adjusting screw hole 16. A guide rod 18 is fixed to the side of the clamping jaw 7 close to the claw rod 8, and a guide rod hole is correspondingly provided on the claw rod 8, and the driving rod 17 passes through the adjusting screw hole 16 and its front end is movably connected to the clamping jaw 7; the adjusting screw hole 16 is provided at the top of the claw rod 8 for screwing the driving rod 17; the function of the adjusting screw hole is to provide a threaded interface so that the driving rod can rotate and move; the driving rod 17 is connected to the adjusting screw hole 16 by thread, and its front end abuts against the clamping jaw 7; the function of the driving rod is to adjust the position of the clamping jaw by rotation, thereby achieving clamping of workpieces of different sizes or shapes; the guide rod 18 is fixed to the side of the clamping jaw 7 close to the claw rod 8, and a guide rod hole is correspondingly provided on the claw rod; the function of the guide rod is to guide and stabilize the movement of the clamping jaw to prevent the clamping jaw from deflecting or shaking during work; the guide rod hole is provided on the claw rod 8, which cooperates with the guide rod 18 on the clamping jaw 7. The function of the guide rod hole is to provide a guide channel so that the guide rod can slide therein, thereby stabilizing the lateral movement of the clamping jaws.

[0025] As a preferred embodiment, the front end of the drive rod 17 is provided with a cylinder 21, and the jaw 7 is provided with a corresponding cylindrical hole 22 adapted to fit within the cylinder 21. The front end of the drive rod 17 is rotatably connected to the cylindrical hole 22 in the jaw 7 via the cylinder 21. The cylinder 21 is provided at the front end of the drive rod 17 and is adapted to engage with the cylindrical hole 22 in the jaw 7. The cylinder serves to provide a rotational axis that extends deep into the jaw, allowing the front end of the drive rod to partially enter the jaw 7. The extension of the cylinder at the front end of the drive rod into the jaw increases the clamping force that the jaw can withstand, ensuring stability when the jaw 7 secures the workpiece.

[0026] In a preferred embodiment, the top plate 6 is circular and has an open slot 9 formed on its outer periphery. The claw rod 8 is slidably mounted within the slot 9, and the clamping jaw 7 is positioned on one side of the claw rod 8 near the center of the top plate. The top plate 6 is circular and has the open slot 9 formed on its outer periphery. The top plate serves as a support platform on which the claw rod can slide, thereby clamping or releasing a workpiece. The open slot 9 is provided on the outer periphery of the top plate 6 to accommodate the claw rod 8. The open slot serves as a sliding channel through which the claw rod can slide, thereby clamping or releasing a workpiece. The claw rod of the present invention has a rectangular cross-section, so the provision of an open slot on the outer periphery of the top plate for the claw rod to pass through facilitates processing. The claw rod 8 is slidably mounted within the slot 9, with one end connected to the movable plate 17 and the other end connected to the clamping jaw 7. The claw rod's function is to adjust the position of the clamping jaw by sliding, thereby clamping or releasing the workpiece. The clamping jaw 7 is positioned on the top of the claw rod 8 near the center of the top plate to clamp or release the workpiece.

[0027] In a preferred embodiment, a slider 15 is fixed to the lower end of the claw rod 8 near the center of the top plate. A slide 14 is provided on the corresponding side of the open slot 9. The slider 15 has a T-shaped cross section, and the slide is a T-slot. The slider 15 is fixed to the lower end of the claw rod 8 near the center of the top plate and is designed to mate with the slide 14 on the top plate. The T-shaped slider and the T-shaped slide ensure smooth sliding of the claw rod while stabilizing its position.

[0028] As a preferred embodiment, the slide groove 14 is provided on the corresponding side of the opening groove 9 for accommodating the slider 15. The function of the slide groove is to provide a sliding channel so that the slider can slide therein, thereby achieving clamping or loosening of the workpiece. The cross section of the slider 15 is T-shaped, and this shape can fix the radial position of the claw rod on the top plate. The slide groove 14 is a T-slot, which can perfectly cooperate with the T-shaped slider, making the claw rod more stable and reliable during the sliding process. The utility model realizes precise adjustment and stable control of the claw rod position through the cooperation of the T-shaped slider and the T-slot slide groove.

[0029] In a preferred embodiment, a screw 11 is provided at the bottom end of the claw rod 8. A socket 10 is provided on the movable plate 5, adapted to accommodate the screw 11. The claw rod 8 is secured to the movable plate via a fixing nut 12. The screw 11 is located at the bottom end of the claw rod 8 and engages with the socket 10 on the movable plate 5. The screw allows the claw rod to be secured to the movable plate via a threaded connection. The socket 10 is provided on the movable plate 5 to accommodate the screw 11, providing a connection channel for the screw 11 to be inserted through the socket 10 and secured to the movable plate 5 via a threaded connection. The fixing nut 12 secures the claw rod 8 to the movable plate 5, firmly securing it to the movable plate 5 and preventing it from loosening or falling off during operation. The screw and fixing nut work together to secure the claw rod. Furthermore, the height of the claw rod can be fine-tuned by adding or removing shims, thereby fine-tuning the height of the clamping jaws and enabling the jaws to be adjusted separately, facilitating stable, multi-position fixation of the workpiece. The utility model realizes the detachable connection between the claw rod and the movable plate, facilitates the installation and disassembly of the clamp, and improves the convenience of using the clamp.

[0030] As a preferred embodiment, there are 6-9 opening slots 9 on the outside of the top plate 6, and 6 in this embodiment, which are evenly distributed in a circular shape on the top plate 6; the sockets 10 on the movable plate 6 are corresponding to the opening slots 9. The number of opening slots 9 is 6, which is significantly increased compared with the prior art, and these opening slots 9 are evenly distributed in a circular shape on the top plate 6. This ensures that the clamping claws can be evenly distributed around the workpiece when clamping the workpiece, providing a balanced clamping force and preventing the workpiece from shifting or tilting during the clamping process. The sockets 10 on the movable plate 5 are corresponding to the opening slots 9 on the top plate 6 to ensure that the claw rod 8 can be accurately docked with the sockets 10 on the movable plate 5 after being inserted into the opening slots 9, thereby realizing the connection between the claw rod 8 and the movable plate 5 and ensuring that the claw rod 8 slides smoothly.

[0031] As a preferred embodiment, the base 2 is a hollow cylindrical body, the hydraulic cylinder 3 is arranged in the base, the support rod 4 is 2-3, and in this embodiment there are 2, which are passed through the support rod holes 23 on the movable plate and fixed on the outer periphery of the top of the base and located on the inner side of the claw rod 8 (see Figure 3 The base 2 is a hollow columnar structure, providing sufficient stability and strength to support the entire fixture's weight and operating loads. The hydraulic cylinder 3 is located within the base 2, saving space and protecting it from external environmental influences, extending its service life. The support rod 4 supports the top plate 6 and guides the movable plate 5, allowing it to be raised and lowered smoothly by the hydraulic cylinder 3.

[0032] As a preferred embodiment, a hydraulic cylinder 3 is disposed on top of the base 2, and its output shaft is fixedly connected to the movable plate 5. This placement of the hydraulic cylinder 3 allows the output shaft of the hydraulic cylinder to align with the direction of motion of the movable plate, improving transmission efficiency. The output shaft of the hydraulic cylinder 3 is fixedly connected to the movable plate 5, ensuring that the hydraulic cylinder's driving force is directly transmitted to the movable plate 5, allowing the movable plate 5 to be raised and lowered smoothly. The placement of the hydraulic cylinder 3 on top of the base 2 and the fixed connection of its output shaft to the movable plate 5 enable smooth raising and lowering of the clamp and efficient transmission, improving the clamp's operating efficiency and safety.

[0033] As a preferred embodiment, a mounting base plate 1 is fixed beneath the base 2. Mounting slots 19 are provided on either side of the mounting base plate 1. Mounting bolts 13 are located within the mounting slots 19, and connecting washers 20 are sleeved onto the outer portions of the mounting bolts 13. The mounting base plate 1 is secured beneath the base 2, providing sufficient stability and strength to support the weight of the entire fixture and the loads it bears during operation. The elongated mounting slots 19 are provided on either side of the mounting base plate. These slots 19 serve to provide mounting locations, allowing the mounting bolts 13 to secure the fixture. After the fixture is installed, the mounting bolts 13 can be loosened, and the mounting slots 19 can be used to adjust the fixture's position for later use.

[0034] When installing and using the hydraulic nail claw type car clamp of the utility model, the mounting base plate 1 is placed in the mounting position and fixed with the mounting bolts 13. After the clamp is installed, the mounting bolts 13 can be loosened and the position of the clamp can be moved left and right using the mounting slots 19 to adjust the position for use. The cam 11 is screwed down to the inside of the jack 10, and the fixing nut 12 is screwed into the outside of the screw 11 at the bottom end of the movable plate 5 and locked. Then the clamp 7 and the clamp 8 can be fixed on the top plate 6. The multiple sets of openings 9 with equal intervals can be installed correspondingly for multiple sets of clamps 7 and clamps 8. When the workpiece is clamped on the top of the top plate 6, the outer side of the top of the workpiece can be fixed in multiple positions. When clamping, the workpiece is placed in the middle position of the top of the top plate 6, and then the hydraulic cylinder 3 can be controlled to start the output end to retract. At the same time, the clamp 7 and the clamp 8 can be driven downward by the movable plate 5. The workpiece is pressed and fixed on the top of the top plate 6 by the clamp 7. The driving rod 17 is rotated upward, and the driving rod 17 can drive the clamping jaw 7 to move inward while the internal thread of the adjusting screw hole 16 is rotated. By adjusting the left and right positions of the clamping jaw 7, workpieces of different widths can be fixed on the fixture.

[0035] Compared with the existing technology, the hydraulic nail claw type lathe clamp of the utility model not only facilitates the stable fixation of the workpiece in multiple positions, but also facilitates the adjustment and clamping of workpieces of different sizes, and also facilitates the adjustment and installation of the hydraulic nail claw type lathe clamp:

[0036] (1) The hydraulic nail claw type lathe clamp is provided with a base, a movable plate, a top plate, a clamping claw, a clamping claw rod, an open groove, a socket, a screw, a fixing nut, a slide and a slider. During use, the slider fixed on the clamping claw rod can be inserted downward into the slide groove in the open groove on the outer side of the top plate, and then the screw fixed on the bottom end of the clamping claw rod can be inserted into the inner side of the socket. After the fixing nut is screwed into the outer side of the screw at the bottom end of the movable plate and locked, the clamping claw rod and the clamping claw can be fixed on the top plate. Multiple sets of open grooves opened at equal intervals can be installed correspondingly. When clamping the workpiece at the top end of the top plate, the outer side of the top end of the workpiece can be fixed at multiple positions, thereby improving the stability of the workpiece during clamping. When clamping, the workpiece is placed in the middle position of the top end of the top plate, and then the hydraulic cylinder can be controlled to start the output end to retract, and at the same time, the clamping claw rod and the clamping claw can be driven downward through the movable plate, and the workpiece can be pressed and fixed to the top end of the top plate by the clamping claw.

[0037] (2) By providing a clamping jaw, a clamping rod, a guide rod, a driving rod and an adjusting screw hole, when the clamp is used, the driving rod can be rotated on the clamping jaw, and the driving rod can drive the clamping jaw to move inward while the internal thread of the adjusting screw hole is rotated. By adjusting the left and right positions of the clamping jaw, it is convenient to fix workpieces of different widths on the clamp.

[0038] (3) By providing a mounting base, a base, mounting bolts, a mounting groove and a connecting gasket, when the hydraulic nail claw type car clamp is installed and used, the mounting base can be directly placed in the installation position and fixed with the mounting bolts. At the same time, after the clamp is installed, the mounting bolts can be loosened and the position of the clamp can be moved left and right using the mounting groove to adjust the use position.

[0039] In addition to the above-mentioned embodiments, within the scope disclosed in the claims and description of the present utility model, the technical features or technical data of the present utility model can be reselected and combined to form new embodiments. These can be achieved by those skilled in the art without creative work. Therefore, these embodiments that are not described in detail in the present utility model should also be regarded as specific embodiments of the present utility model and within the scope of protection of the present utility model.

Claims

1. A hydraulic nail claw type lathe clamp, comprising a base, characterized in that: The base is provided with a support rod, the top of the support rod is provided with a top plate, and a movable plate that can slide along the support rod is provided below the top plate. The movable plate is connected to the hydraulic cylinder arranged on the base, and the movable plate is provided with multiple claw rods passing through the top plate. The top of the claw rod is provided with a position-adjustable clamping claw.

2. The hydraulic nail claw type lathe clamp according to claim 1, characterized in that: An adjusting screw hole is provided at the top of the claw rod, and a driving rod is screwed on the adjusting screw hole. A guide rod parallel to the driving rod is fixed to the side of the clamping claw close to the claw rod, and a guide rod hole is correspondingly provided on the claw rod. The driving rod passes through the adjusting screw hole and its front end is movably connected to the clamping claw.

3. The hydraulic nail claw type lathe clamp according to claim 2, characterized in that: The front end of the driving rod is provided with a cylinder, and the clamping jaw is correspondingly provided with a cylindrical hole adapted to the cylinder. The front end of the driving rod is rotatably connected to the cylindrical hole on the clamping jaw through the cylinder.

4. The hydraulic nail claw type lathe clamp according to claim 1, characterized in that: The top plate is circular, and an open groove is provided on the outer periphery of the top plate. The claw rod is slidably arranged inside the open groove, and the clamping claw is arranged on one side of the claw rod close to the center of the top plate.

5. The hydraulic nail claw type lathe clamp according to claim 4, characterized in that: A slider is fixed to the lower end of the claw rod close to the center of the top plate, and a sliding groove is provided on the corresponding side of the opening groove. The cross section of the slider is T-shaped, and the sliding groove is a T-shaped groove.

6. The hydraulic nail claw type lathe clamp according to claim 5, characterized in that: The bottom end of the claw rod is provided with a screw rod, and the movable plate is provided with a socket adapted to the screw rod. The claw rod is fixed on the movable plate through a fixing nut below the movable plate.

7. The hydraulic nail claw type lathe clamp according to claim 6, characterized in that: There are 6 to 9 opening slots on the outer side of the top plate, which are evenly distributed in a ring shape on the top plate; the insertion holes on the movable plate are arranged corresponding to the opening slots.

8. The hydraulic nail claw type lathe clamp according to claim 1, characterized in that: The base is a hollow columnar body, the hydraulic cylinder is arranged in the base, and there are 2-3 support rods fixed on the outer periphery of the top end of the base.

9. The hydraulic nail claw type lathe clamp according to claim 1, characterized in that: The hydraulic cylinder is arranged on the upper part of the base, and the output shaft of the hydraulic cylinder is fixedly connected to the center of the movable plate.

10. The hydraulic nail claw type lathe clamp according to any one of claims 1 to 9, characterized in that: A mounting base plate is fixed under the base, and mounting grooves are respectively provided on both sides of the mounting base plate, and mounting bolts are provided in the mounting grooves.

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