A mobile worktable clamping device and clamping method

Abstract

A kind of mobile workstation clamping device and clamping method, belong to press machine technical field, mobile workstation clamping device includes pedestal fixedly installed on the base of press machine, piston vertically moves in pedestal, piston bottom is connected with telescopic electric cylinder assembly, clamping head is hinged on pedestal, and the side of pedestal close to clamping head is slidably connected with pressure head;Piston is equipped with the push column that moves horizontally, and the both sides of push column are respectively rotatably connected with a support rod, the end of one support rod extends piston and is used to abut with the inner wall of pedestal, and the end of another support rod extends piston and is used to push pressure head and move horizontally, in relaxed state, the axis of push column is located on the side of piston axis away from clamping head, and support rod is in inclined downward state;In clamping state, push column is transversely moved, and support rod is in inclined upward state.By telescopic electric cylinder drive, the force is realized using hinge rod, while ensuring the stability of clamping force, overall structure is more compact, and use cost is low.

Description

Technical Field

[0001] This invention relates to the field of press technology, and in particular to a moving worktable clamping device and clamping method. Background Technology

[0002] A press is a general-purpose device that uses pressure to process and shape workpieces. Its core is to use pressure to cause plastic deformation or separation of metal and non-metal materials, thereby completing processing steps such as stamping, forging, bending, and straightening.

[0003] During the operation of the press, the clamping and loosening of the moving worktable is involved as the mold changing process is executed. The clamping and loosening of the moving worktable is achieved by the worktable clamping device. The worktable clamping device mainly adopts two forms: double-ended bolts and hydraulic clamping devices. When using double-ended bolts for clamping, manual tightening is required, the tightening force is not easy to control, and the operation process is complicated. When using hydraulic clamping devices (such as publication number CN221049101U), clamping and loosening are mainly achieved through hydraulic control.

[0004] The stamping process generates continuous impact vibrations, requiring the clamping head to continuously provide a stable clamping force. Existing hydraulic clamps rely on hydraulic drive, and to ensure a stable output of clamping force, a corresponding hydraulic system and pipeline layout are required, increasing the equipment's maintenance costs and space requirements. Summary of the Invention

[0005] To address the technical problem in the background art that existing hydraulic clamps rely on hydraulic drive, requiring a corresponding hydraulic system and pipeline layout to ensure stable clamping force output, thus increasing equipment maintenance costs and space requirements, this invention provides a mobile workbench clamping device and clamping method.

[0006] The technical solution of this invention is as follows:

[0007] This invention provides a mobile worktable clamping device, including a support fixedly mounted on a press base. A vertically movable piston is located within the support, and a telescopic electric cylinder assembly is connected to the bottom of the piston. A clamping head is hinged to the support, and a pressure head is slidably connected to the side of the support near the clamping head. A laterally movable push column is located within the piston, and a support rod is rotatably connected to each side of the push column. The end of one support rod extends out of the piston and abuts against the inner wall of the support, while the end of the other support rod extends out of the piston and pushes the pressure head laterally. In the relaxed state, the axis of the push column is located on the side of the piston axis away from the clamping head, and the support rod is inclined downwards. In the clamped state, the axis of the push column is located on the side of the piston axis near the clamping head, and the support rod is inclined upwards. The telescopic electric cylinder assembly is used as the core drive component, replacing the hydraulic drive mode of the hydraulic clamp. This eliminates the need for a hydraulic pump, oil tank, control valve group, and complex pipelines required for hydraulic drive, reducing initial investment costs and avoiding common faults such as hydraulic oil leakage and pipeline blockage. It also reduces the frequency and cost of daily maintenance and saves space required for pipeline layout, allowing for a more compact and rational layout of equipment around the press. The push column and the two side support rods form a symmetrical hinge force-amplifying structure. As the piston moves upward, the support rods gradually change from diagonally downward to diagonally upward, utilizing the force amplification characteristics of hinge transmission to amplify the output force of the telescopic electric cylinder several times, saving energy. Combined with the lateral movement of the push column from the eccentric position to the piston axis position, the force transmission path is more direct and the force is more balanced. Even under continuous high-frequency impact vibration during the stamping process, the clamping force of the clamping head can be kept constant through the force transmission stability of the structure itself, effectively avoiding the risk of clamping loosening caused by vibration and ensuring the processing accuracy and operational safety of stamping operations.

[0008] Preferably, a push block is rotatably connected to the end of the support rod away from the push column, which transforms the arc motion of the support rod end into a smooth linear contact with the contacting component. This significantly reduces the friction coefficient and wear rate between the support rod end and the contacting component, avoiding force transmission loss due to component wear after long-term use. At the same time, the planar contact form of the push block allows the force to be evenly distributed on the contact surface, avoiding local stress concentration and reducing failures such as cracks and deformations caused by fatigue wear. This not only improves the stability and reliability of the entire force transmission chain, but also extends the service life of the support rod, the inner wall of the support, the pressure head, and other force-bearing components, reducing the replacement frequency and maintenance costs of vulnerable parts.

[0009] Preferably, a pressure cap and a support sleeve are detachably installed on the side of the support away from the clamping head. The push block away from the clamping head is disposed inside the support sleeve, with one side of the push block abutting against the pressure cap. The support sleeve can rigidly constrain the push block, avoiding abutment failure or local overload caused by force displacement of the push block, and providing a stable support reference for force transmission in the hinge force enhancement structure.

[0010] Preferably, the pressure head has a U-shaped cross-section, with the push block near the clamping head slidingly disposed inside the pressure head. This effectively limits the offset of the push block perpendicular to the direction of movement, ensuring that the thrust of the push block is always transmitted along the sliding direction of the pressure head. At the same time, the U-shaped structure forms a large-area surface contact with the end face of the push block, so that the force of the push block is evenly distributed at the bottom of the pressure head. This avoids local stress concentration in the pressure head caused by point contact or line contact, and prevents bending deformation or uneven wear of the pressure head due to long-term uneven force. It enables the pressure head to maintain force balance during sliding, avoiding jamming or uneven wear with the sliding surface of the support due to unilateral force. This ensures that the thrust of the pressure head on the clamping head is always stable and directional, providing uniform power input for the reliable rotation of the clamping head.

[0011] Preferably, the piston has a mounting groove on its top, in which a disc spring is installed. A push cover is connected above the disc spring. In the free state, the upper surface of the push cover is higher than the piston. A top cover is detachably installed on the support, located above the push cover. After the piston moves upward until the push cover contacts the top cover, it can absorb the excess stroke of the piston through its own compression deformation, forming a flexible buffer to avoid component damage caused by rigid collision between the piston and the top cover. At the same time, it converts the impact energy into elastic potential energy, providing auxiliary power for the subsequent release action. During the buffering process, the elastic force of the disc spring can continuously push the push cover and the top cover into close contact, making the upward movement of the piston smoother. This ensures that the gradual transition of the support rod from a horizontal state to an oblique upward state is precise and controllable, providing stable stroke compensation for the formation of the mechanical self-locking state and ensuring the accuracy of the self-locking angle.

[0012] Preferably, the bottom of the clamping head is rotatably connected to the support via a rotating shaft, the inner side of the top of the clamping head contacts the pressure head, and a limiting part is fixedly provided on the outer side of the top of the clamping head. A wear-resistant plate is fixedly installed on the lower surface of the limiting part. The inner side of the top of the clamping head contacts the surface of the pressure head, so that the thrust of the pressure head can be evenly transmitted to the clamping head, avoiding deformation of the clamping head caused by localized force. As a component that directly contacts the pressure body, the wear-resistant plate installed on the lower surface of the limiting part can effectively resist high-frequency friction and impact wear caused by stamping vibration. At the same time, the flat surface of the wear-resistant plate can ensure the contact fit with the pressure body and avoid uneven clamping force distribution caused by uneven wear.

[0013] Preferably, the height of the wear-resistant plate is lower than that of the pressure head, so that the distance from the contact point between the pressure head and the clamping head to the center of the rotating shaft is greater than the distance from the contact point between the wear-resistant plate and the pressure-bearing body to the center of the rotating shaft. This makes the clamping head form a lever structure. When the ratio of the power arm to the resistance arm is greater than 1, the thrust input by the pressure head can be further amplified, realizing a secondary force amplification effect. This amplification effect is superimposed on the hinge rod force-enhancing structure, which greatly increases the total force amplification factor of the entire device. This allows the use of a smaller power telescopic electric cylinder assembly to meet the large clamping force requirement, which not only reduces the initial purchase cost of the electric cylinder, but also reduces the operating energy consumption of the equipment. At the same time, the force transmission of the lever structure is more stable, which can evenly distribute the amplified clamping force on the contact surface between the wear-resistant plate and the pressure-bearing body, avoiding local overload and further improving the stability and reliability of clamping.

[0014] Preferably, the top of the clamping head is connected to the support via a spring. When the telescopic electric cylinder drives the piston to move downward, the spring can release the tension, pulling the clamping head to rotate in the opposite direction around the rotation axis, thereby achieving rapid reset.

[0015] A clamping method includes: a telescopic electric cylinder assembly pushes a piston upward, a support rod changes from a downward angled state to an upward angled state, a push block away from the pressure head abuts against the pressure cap to push a push column towards the pressure head, thereby pushing the pressure head outward through the support rod and the push block, the pressure head pushes a clamping head to rotate around a rotation axis, and a limiting part presses the pressure body; when it is necessary to release the pressure body, the telescopic electric cylinder assembly drives the piston downward, the push column moves away from the pressure head, the support rod changes from an upward angled state to a downward angled state, and a spring pulls the clamping head to self-reset. The telescopic electric cylinder assembly is used as the core drive component, replacing the hydraulic drive mode of the hydraulic clamp. This eliminates the need for a hydraulic pump, oil tank, control valve group, and complex pipelines required for hydraulic drive, reducing initial investment costs and avoiding common faults such as hydraulic oil leakage and pipeline blockage. It also reduces the frequency and cost of daily maintenance and saves space required for pipeline layout, allowing for a more compact and rational layout of equipment around the press. The push column and the two side support rods form a symmetrical hinge force-amplifying structure. As the piston moves upward, the support rods gradually change from diagonally downward to diagonally upward, utilizing the force amplification characteristics of hinge transmission to amplify the output force of the telescopic electric cylinder several times, saving energy. Combined with the lateral movement of the push column from the eccentric position to the piston axis position, the force transmission path is more direct and the force is more balanced. Even under continuous high-frequency impact vibration during the stamping process, the clamping force of the clamping head can be kept constant through the force transmission stability of the structure itself, effectively avoiding the risk of clamping loosening caused by vibration and ensuring the processing accuracy and operational safety of stamping operations.

[0016] Preferably, during the upward movement of the piston, when the push cover initially contacts the top cover, the support rod changes from a downward-sloping state to a horizontal state. The piston continues to move upward to compress the disc spring until the top of the piston contacts the top cover. At this point, the support rod changes from a horizontal state to an upward-sloping state, entering a mechanical self-locking state. The mechanical self-locking state is achieved through the upward-sloping angle of the support rod, utilizing the structural force characteristics to maintain the clamping force. Even after the telescopic electric cylinder stops driving, and the power is cut off, the clamping head can still maintain a stable clamping force, exhibiting high reliability and being unaffected by external factors such as voltage fluctuations and hydraulic oil leaks. It can also withstand high-frequency, large-amplitude impact vibrations generated during the stamping process.

[0017] As can be seen from the above technical solutions, the advantages of the present invention are:

[0018] 1. By using a telescopic electric cylinder assembly as the drive component, the hydraulic pump, oil tank, control valve group, and complex pipelines required for hydraulic drive are eliminated. This not only reduces the initial investment cost of the equipment but also avoids common faults such as hydraulic oil leakage and pipeline blockage, reducing the frequency and cost of daily maintenance. It also saves space required for pipeline layout, allowing for a more compact and rational layout of the equipment around the press. The push column and the two side support rods form a symmetrical hinge-like force-amplifying structure. During the upward movement of the piston, the support rods gradually change from a downward to an upward angle, utilizing the force amplification characteristics of the hinge transmission to amplify the output force of the telescopic electric cylinder several times, saving energy. Combined with the lateral movement of the push column from the eccentric position to the piston axis position, the force transmission path is more direct and the force is more balanced. Even under continuous high-frequency impact vibration during stamping, the clamping force of the clamping head can remain constant through the structural force transmission stability, effectively avoiding the risk of clamping loosening caused by vibration and ensuring the processing accuracy and operational safety of stamping operations.

[0019] 2. The clamping head is a lever structure, making the distance from the contact point between the pressure head and the clamping head to the center of the rotation shaft greater than the distance from the contact point between the wear-resistant plate and the pressure body to the center of the rotation shaft. This further amplifies the thrust input by the pressure head, achieving a secondary force amplification effect. This amplification effect, combined with the hinge rod force-enhancing structure, significantly increases the total force amplification factor of the entire device. This allows for the use of a smaller power telescopic electric cylinder assembly to meet the large clamping force requirements, reducing not only the initial purchase cost of the electric cylinder but also the operating energy consumption of the equipment. At the same time, the force transmission of the lever structure is more stable, which can evenly distribute the amplified clamping force on the contact surface between the wear-resistant plate and the pressure body, avoiding local overload and further improving the stability and reliability of clamping. Attached Figure Description

[0020] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the relaxed state structure of the movable worktable clamping device according to one or more embodiments of the present invention.

[0022] Figure 2 This is a schematic diagram of the clamping state structure of the mobile worktable clamping device according to one or more embodiments of the present invention.

[0023] The components represented by the various reference numerals in the diagram are:

[0024] 1. Telescopic electric cylinder assembly; 2. Support; 3. Clamping head; 31. Limiting part; 4. Wear-resistant plate; 5. Rotating shaft; 6. Connecting head; 7. Piston; 8. Push column; 9. Support rod; 10. Support sleeve; 11. Disc spring; 12. Pressure cover; 13. Push block; 14. Top cover; 15. Pressure head; 16. Spring; 17. Push cover; 18. Pressure body. Detailed Implementation

[0025] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0026] Example 1

[0027] In a typical embodiment of the present invention, such as Figures 1-2As shown, a moving worktable clamping device is proposed, including: a telescopic electric cylinder assembly 1, a support 2, a clamping head 3, a piston 7, a pusher 8, a support rod 9, and a pressure head 15. The support 2 is fixedly mounted on the base of the press. The piston 7 is vertically slidably disposed within the support 2, and its bottom is fixedly connected to the pusher rod of the telescopic electric cylinder assembly 1. The clamping head 3 is hinged to the support 2 and is located on one side of the piston 7. The pusher 8 is laterally slidably disposed inside the piston 7. Specifically, the pusher 8 can move along the piston inside the piston 7. The radial direction of the 7 moves towards or away from the clamping head 3. The support 2 has an opening on the side near the clamping head 3. The pressure head 15 is slidably disposed in the opening. A support rod 9 is rotatably connected to each side of the push column 8. The two support rods 9 are arranged opposite to each other. The end of one support rod 9 extends out of the piston 7 and is used to abut against the inner wall of the support 2. The end of the other support rod 9 extends out of the piston 7 and is used to push the pressure head 15 to move laterally. Thus, the pressure head 15 provides thrust to the clamping head 3, thereby achieving the clamping of the pressure body 18.

[0028] In this embodiment, as Figure 1 As shown, in the relaxed state, the axis of the push rod 8 is located on the side of the piston 7 axis away from the clamping head 3, while the support rod 9 is in a downward angled state; in the clamped state, the axis of the push rod 8 is located on the side of the piston 7 axis closer to the clamping head 3, while the support rod 9 is in a downward angled state.

[0029] The piston 7 is driven to move vertically by the telescopic electric cylinder assembly 1, which in turn drives the support rod 9 to move. The support rod 9 then pushes the pressure head 15 to clamp or release the clamping head 3, eliminating the need for a hydraulic system. In conjunction with the support rod 9 and the push column 8, the hinge rod is used to increase the force, thus achieving small input and large output. The hinge rod also has a self-locking function, ensuring stable clamping force while making the overall structure of the clamping device more compact, with low operating costs and simple operation.

[0030] The telescopic electric cylinder assembly 1 includes a servo motor, a reduction mechanism, and a push rod. The motor converts the rotational motion into the linear motion of the push rod through a transmission mechanism, such as a gear or a lead screw, thereby realizing the telescopic function. The push rod of the telescopic electric cylinder assembly 1 is threadedly connected to a connector 6, which is a T-shaped head. A T-slot is provided inside the piston 7 for connection with the connector 6. The connector 6 is inserted into the T-slot to realize the connection between the telescopic electric cylinder assembly 1 and the piston 7, thereby controlling the vertical movement of the piston 7.

[0031] The pusher 8 is a cylindrical structure and is movably disposed inside the piston 7. The pusher 8 has a mounting hole for rotational connection with the support rod 9. The end of the support rod 9 away from the pusher 8 extends outward from the piston 7 and is rotatably connected to the pusher block 13 so as to abut against the inner wall of the corresponding support 2 or the pressure head 15 through the pusher block 13.

[0032] Specifically, the support 2 has two openings arranged opposite to each other. One opening is located on the side of the support 2 near the clamping head 3, and the other opening is located on the side of the support 2 away from the clamping head 3. The opening near the clamping head 3 is slidably connected to the pressure head 15. The opening away from the clamping head 3 is detachably installed with the pressure cover 12 and the support sleeve 10. The pressure cover 12 is fixedly connected to the support 2 by bolts, and the support sleeve 10 is fixedly connected to the pressure cover 12. The support sleeve 10 is inserted into the corresponding opening. A push block 13 is detachably installed inside the support sleeve 10. One side of the push block 13 abuts against the pressure cover 12, and the other side of the push block 13 is rotatably connected to the end of the adjacent support rod 9.

[0033] The pressure head 15 has a U-shaped cross-section. A push block 13 is slidably provided on the inner side of the pressure head 15, and the inner wall of the pressure head 15 abuts against the adjacent push block 13. The side of the push block 13 away from the pressure head 15 is rotatably connected to the end of the adjacent support rod 9. Thus, when the support rod 9 changes from an inclined state to a horizontal state, the support rod 9 on the side of the push column 8 away from the pressure head 15 abuts against the pressure cover 12 through the push block 13, thereby pushing the push column 8 to move towards the side closer to the pressure head 15. Then, the support rod 9 and the push block 13 on the side of the push column 8 closer to the pressure head 15 push the pressure head 15 to slide outward, so as to apply a thrust to the clamping head 3 using the pressure head 15. The support rod 9, piston 7 and push column 8 cooperate to form a hinge force amplification structure, so as to amplify the force transmitted to the piston 7 by the telescopic electric cylinder assembly 1 by several times, so as to achieve the effect of small power and large output, and reduce energy consumption.

[0034] The pressure head 15 and the support 2 are limited by a limiting structure. Specifically, the inner side of the pressure head 15 is fixedly provided with a flange, and the support 2 is provided with a flange that cooperates with it. Thus, the pressure head 15 is limited by the cooperation of the flanges to prevent the pressure head 15 from coming out.

[0035] like Figure 1 As shown, a mounting groove is provided at the center of the top of the piston 7, and a disc spring 11 is installed in the mounting groove. A push cover 17 is provided above the disc spring 11. The push cover 17 is connected to the piston 7 by a pin, and the push cover 17 and the pin are slidably connected so that the push cover 17 can compress the disc spring 11 to play a buffering role and prevent the top of the piston 7 from being damaged by a hard collision with the support 2. A top cover 14 is detachably installed on the support 2. The top cover 14 is located directly above the push cover 17, which facilitates the installation and maintenance of the piston 7 and other components.

[0036] The diameter of the push cover 17 is the same as the inner diameter of the mounting groove. In this embodiment, the push cover 17 and the disc spring 11 not only serve as a buffer but also as initial positioning. When the push cover 17 initially contacts the top cover 14, the support rod 9 is in a horizontal state. At this time, it moves to the dead point position of the hinge mechanism. When the piston 7 continues to move upward to compress the disc spring 11, the end of the support rod 9 near the push post 8 moves upward a small distance, causing the support rod 9 to form a small upward tilt angle (e.g., Figure 2 As shown in the figure, it enters a mechanical self-locking state to ensure the stability of the clamping.

[0037] It can be understood that the upward movement distance of the support rod 9 near the push post 8 is the same as the distance between the upper surface of the push cover 17 and the upper surface of the piston 7.

[0038] like Figure 1 As shown, the clamping head 3 is rotatably connected to the support 2 via the rotating shaft 5. The clamping head 3 is also connected to the support 2 via the spring 16. The spring 16 is in an inclined state for the self-resetting of the clamping head 3. When the pressure head 15 pushes the clamping head 3 to clamp the pressure body 18, the spring 16 stretches and stores force. When the push block 13 resets, the spring 16 pulls the clamping head 3 to reset, and at the same time pushes the pressure head 15 to reset through the clamping head 3.

[0039] Specifically, the bottom of the clamping head 3 is rotatably connected to the support 2 via the rotating shaft 5, the inner side of the top of the clamping head 3 is in contact with the pressure head 15, and a limiting part 31 is fixedly provided on the outer side of the top of the clamping head 3. A wear-resistant plate 4 is fixedly installed on the lower surface of the limiting part 31 so that the wear-resistant plate 4 contacts the upper surface of the pressure body 18, thereby achieving the pressing and limiting of the pressure body 18.

[0040] In this embodiment, the height of the wear-resistant plate 4 is lower than that of the pressure head 15, so that the distance from the point of force application of the pressure head 15 to the clamping head 3 to the rotating shaft 5 is greater than the distance from the contact point between the wear-resistant plate 4 and the pressure body 18 to the rotating shaft 5. This makes the clamping head 3 form a lever structure, so that the power arm is greater than the resistance arm, thereby amplifying the force and further reducing the energy consumption of the telescopic electric cylinder assembly 1.

[0041] Example 2

[0042] In another typical embodiment of the present invention, such as Figures 1-2 As shown, a clamping method is proposed, including:

[0043] The telescopic electric cylinder assembly 1 pushes the piston 7 upward, and the piston 7 drives the push column 8 and the end of the connected support rod 9 to move upward, so that the support rod 9 changes from a downward angle to an upward angle. The support rod 9 on the side of the push column 8 away from the pressure head 15 abuts against the pressure cover 12 through the push block 13, thereby pushing the push column 8 to move towards the pressure head 15. Then, the support rod 9 and the push block 13 on the side of the push column 8 near the pressure head 15 push the pressure head 15 to slide outward, so as to apply a pushing force to the clamping head 3 using the pressure head 15. The cooperation of the support rod 9 with the piston 7 and the push column 8 forms a hinge force amplification structure to amplify the force transmitted to the piston 7 by the telescopic electric cylinder assembly 1 several times. The pressure head 15 pushes the clamping head 3 to rotate around the rotation axis 5, so as to press the pressure body 18 using the limiting part 31.

[0044] Specifically, during the upward movement of piston 7, when push cover 17 initially contacts top cover 14, support rod 9 changes from a downward angled state to a horizontal state, at which point it is at its dead center position; piston 7 continues to move upward a small distance to compress disc spring 11 until the top of piston 7 contacts top cover 14, at which point support rod 9 changes from a horizontal state to an upward angled state (e.g., ...). Figure 2 As shown, the support rod 9 has a slight upward tilt angle and enters a mechanical self-locking state to ensure the stability of the clamping. In this embodiment, the upward tilt of the support rod 9 is in the range of 1°-3°.

[0045] When it is necessary to release the pressure body 18, the telescopic electric cylinder assembly 1 drives the piston 7 to move downward. The piston 7 drives the push column 8 and the end of the connected support rod 9 to move downward. The push column 8 moves away from the pressure head 15, so that the support rod 9 changes from the inclined upward self-locking state to the inclined downward relaxed state. During this period, the spring 16 pulls the clamping head 3 to self-reset. At the same time, the clamping head 3 pushes the pressure head 15 to self-reset, so as to cancel the pushing force applied by the pressure head 15 to the clamping head 3, thereby canceling the pressing limit of the limiting part 31 on the pressure body 18.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mobile worktable clamping device, comprising: A support (2) fixedly installed on the base of a press is characterized in that a vertically movable piston (7) is provided inside the support (2), a telescopic electric cylinder assembly (1) is connected to the bottom of the piston (7), a clamping head (3) is hinged on the support (2), and a pressure head (15) is slidably connected to the side of the support (2) near the clamping head (3); a horizontally movable push column (8) is provided inside the piston (7), a mounting groove is provided on the top of the piston (7), a disc spring (11) is installed in the mounting groove, a push cover (17) is connected above the disc spring (11), and the upper surface of the push cover (17) is higher than the piston (7) in the free state of the disc spring (11). A detachable part is installed on the support (2). Top cover (14) is located above push cover (17). A support rod (9) is rotatably connected to both sides of push column (8). The end of one support rod (9) extends out of piston (7) and is used to abut against the inner wall of support (2). The end of the other support rod (9) extends out of piston (7) and is used to push pressure head (15) to move laterally. In the relaxed state, the axis of push column (8) is located on the side of piston (7) away from clamping head (3), and support rod (9) is in a downward angle. In the clamped state, the axis of push column (8) is located on the side of piston (7) close to clamping head (3), and support rod (9) is in a downward angle.

2. The mobile worktable clamping device according to claim 1, characterized in that, The end of the support rod (9) away from the push column (8) is rotatably connected to the push block (13).

3. The mobile worktable clamping device according to claim 2, characterized in that, The support (2) has a pressure cap (12) and a support sleeve (10) detachably installed on the side away from the clamping head (3). The push block (13) away from the clamping head (3) is set inside the support sleeve (10), and one side of the push block (13) abuts against the pressure cap (12).

4. The moving worktable clamping device according to claim 2, characterized in that, The cross-sectional shape of the pressure head (15) is U-shaped, and the push block (13) near the clamping head (3) is slidably disposed inside the pressure head (15).

5. The mobile worktable clamping device according to claim 1, characterized in that, The bottom of the clamping head (3) is rotatably connected to the support (2) via the rotating shaft (5). The inner side of the top of the clamping head (3) is in contact with the pressure head (15). A limiting part (31) is fixedly provided on the outer side of the top of the clamping head (3). The limiting part (31) is used to press the pressure body (18). A wear-resistant plate (4) is fixedly installed on the lower surface of the limiting part (31).

6. The moving worktable clamping device according to claim 5, characterized in that, The height of the wear-resistant plate (4) is lower than that of the pressure head (15).

7. The moving worktable clamping device according to claim 5, characterized in that, The top of the clamping head (3) is connected to the support (2) via a spring (16).

8. A clamping method, characterized in that, The mobile worktable clamping device as described in any one of claims 5-7 is used. The method includes: the telescopic electric cylinder assembly (1) pushes the piston (7) to move upward, the support rod (9) changes from a downward angle to an upward angle, the push block (13) away from the pressure head (15) abuts against the pressure cover (12) to push the push column (8) to move toward the direction closer to the pressure head (15), and then pushes the pressure head (15) to slide outward through the support rod (9) and the push block (13), the pressure head (15) pushes the clamping head (3) to rotate around the rotation axis (5), and the limiting part (31) presses the pressure body (18); When it is necessary to release the pressure body (18), the telescopic electric cylinder assembly (1) drives the piston (7) to move downward, the push column (8) moves away from the pressure head (15), the support rod (9) changes from the upward angle to the downward angle, and the spring (16) pulls the clamping head (3) to reset itself.

9. The clamping method according to claim 8, characterized in that, During the upward movement of the piston (7), when the push cover (17) initially contacts the top cover (14), the support rod (9) changes from a downward angle to a horizontal position. The piston (7) continues to move upward to compress the disc spring (11) until the top of the piston (7) contacts the top cover (14). At this time, the support rod (9) changes from a horizontal position to an upward angle and enters a mechanical self-locking state.

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