A force amplifying compression mechanism

Abstract

The present application relates to the technical field of mechanical force amplification, and in particular to a force amplification compression mechanism, comprising a cylinder and a reference table, the cylinder being inverted, a connecting head being installed on an output shaft of the cylinder, at least one main force arm being arranged on the reference table and connected with the connecting head, and a downward pressing arm rod being vertically arranged on the main force arm, the pressure of the cylinder being multiplied to achieve the effect of force amplification, and the original force point of the cylinder being increased to multiple force points, thereby effectively improving the downward pressing clamping force without replacing a large-diameter large cylinder, two-stage pressurization being able to be performed to further improve the downward pressing clamping force, the force amplification effect being enhanced, and the mold loading height adjusting mechanism being as uniformly subjected to the downward pressing clamping force as possible, so that the mold loading height adjusting mechanism can be clamped and fixed, the mold loading height is stably locked, changes in the mold loading height caused by huge impact and vibration are prevented, and safe and high-quality forging is ensured.

Description

Technical Field

[0001] This invention relates to the field of mechanical force amplification technology, and more specifically, to a force-amplifying clamping mechanism. Background Technology

[0002] Forging is a processing method that uses forging equipment to apply external force to metal billets, causing them to undergo permanent plastic deformation to obtain parts with specific microstructure, properties, shapes, and dimensions. Forging equipment, also known as metal forming machine tools, is the mechanical equipment used for forming and separating parts in metal forging, primarily applied in the field of metal plastic processing. Its development began with water-powered drop hammers in the 14th century, progressing through stages such as steam hammers and hydraulic presses, until the late 19th century when electric drive systems were developed. Since the 1960s, it has gradually evolved towards higher speeds, automation, and precision. Forging equipment is the core equipment for metal plastic processing.

[0003] To accommodate dies of varying heights, some forging equipment is equipped with a wedge-shaped die height adjustment mechanism. The die height must be controlled within a reasonable range for the die to be installed and function properly. Once the desired die height is set via the adjustment mechanism, it must be locked to prevent loosening. The significant impacts and vibrations during forging can cause slight rotation or slippage of unlocked threads or bevels, altering the die height. If this change occurs, the die will slide or shift along the die height direction due to stress, leading to inaccurate die closing, dimensional errors in forgings, or even equipment damage. However, simply increasing the cylinder size to achieve a stronger clamping force for the die height adjustment mechanism not only limits the available space on the forging equipment but also increases system energy consumption and operating costs. Summary of the Invention

[0004] The purpose of this invention is to provide a force-increasing clamping mechanism to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides a force-increasing clamping mechanism, comprising: a cylinder and a reference platform, wherein the cylinder is inverted, a connector is mounted on the output shaft of the cylinder, at least one main arm is disposed on the reference platform and connected to the connector, and a downward pressing arm is vertically disposed on the main arm. After driving the cylinder, all the main arms are pushed down, and the pressure from the main arms is increased and transmitted downward through the lowering arm.

[0006] Furthermore, a side frame is provided on the reference platform, and a rotating shaft is provided on the side frame. One end of the main arm is connected to the connector through a ball joint, and the other end is connected to the rotating shaft on the side frame. The distance from the lowering arm to the side frame is less than the distance from the lowering arm to the connector; When the cylinder is started, the main arm swings through the connector.

[0007] Furthermore, the main arm has a circular sleeve near the side frame, through which the lower pressure arm passes. The top of the circular sleeve is provided with an annular top sleeve, the inner wall of which is chamfered. The lower pressure arm is equipped with an abutting tail handle and a diameter-increasing disc. The bottom of the abutting tail handle has rounded corners, and arc-shaped ribs are installed on the rounded corner surfaces. The lower end of the lower pressure arm is equipped with a counterweight ring. Under the action of gravity, the bottom of the abutting tail is inserted into the annular top sleeve, at which time the arc-shaped rib is attached to the inner wall of the annular top sleeve. The diameter of the diameter-increasing disc is larger than that of the circular sleeve and is attached to its bottom.

[0008] Furthermore, the end pressure head of the lower pressure arm is connected to the main body via a ball joint.

[0009] Furthermore, the lowering arm is divided into an upper arm and a lower arm. The upper arm passes through the circular sleeve, and the lower arm slides into the upper arm. A second cylinder is installed on the side of the upper arm, and a force-receiving protrusion is installed on the lower arm. The output end of the second cylinder is connected downward to the force-receiving protrusion. Several counterweight plates are provided on the upper arm at the position opposite to the second cylinder.

[0010] Furthermore, a suspension platform is installed on the bottom of the reference platform, and a third cylinder is fixed on the suspension platform. The output end of the third cylinder is connected to a circular converging groove, and the opening of the circular converging groove faces downward. A movable plate is assembled in the circular converging groove. Several rectangular grooves are arranged in an array at the bottom of the movable plate. Sliding buckles are respectively assembled in the several rectangular grooves, and a secondary arm is installed at the bottom of the sliding buckle. Several of the aforementioned auxiliary booms are located inside the lowering boom; The movable plate can rotate and move up and down within the circular groove, and the sliding buckle can slide linearly within the rectangular groove.

[0011] Furthermore, a limit switch is installed on the reference platform, and a contact angle plate is installed on the side of the main arm, with the contact angle plate aligned with the operating head of the limit switch.

[0012] Furthermore, a top head is provided on the reference platform, and a connecting plate is mounted on the main arm, with the connecting plate aligned with the top head.

[0013] Furthermore, the upper arm is provided with a magnetic absorbing piece; The circular groove is equipped with a magnetic column, the movable plate is annular, and the movable plate is attached to the magnetic column. A magnetic suction rod is provided inside the rectangular groove, and the sliding buckle is fitted onto the magnetic suction rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention amplifies the cylinder pressure exponentially through a mechanical structure, thereby increasing the force. It also increases the number of points of application of the cylinder from one to multiple, effectively improving the downward clamping force without replacing it with a larger diameter cylinder. This achieves greater force without increasing the size or occupying excessive space in the forging equipment, while avoiding excessive system operating pressure and controlling operating costs. Furthermore, based on the increased cylinder pressure, this invention allows for secondary pressurization, further enhancing the downward clamping force and strengthening the force amplification effect. Moreover, this invention ensures that the die height adjustment mechanism is evenly subjected to the downward clamping force, guaranteeing a secure and locked die height. This prevents changes in the die height under significant impact and vibration, ensuring safe and high-quality forging. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 A perspective view of the present invention is shown; Figure 2 A second perspective view of the present invention is shown; Figure 3 A partial front view of the present invention is shown; Figure 4 A third perspective view of the present invention is shown; Figure 5 A fourth perspective view of the present invention is shown; Figure 6 A fifth perspective view of the present invention is shown; Figure 7 The present invention is shown. Figure 1 Enlarged view of point A; Figure 8 The present invention is shown. Figure 1 Enlarged view of point B; Figure 9 The present invention is shown. Figure 4 Enlarged view of point C; Figure 10 The present invention is shown. Figure 5 Enlarged view of point D.

[0017] In the figure, the same reference numerals represent the same structural element, wherein: 1. Cylinder; 2. Base plate; 3. Connector; 4. Main arm; 5. Lower arm; 51. End pressure head; 52. Upper arm; 53. Lower arm; 6. Side frame; 7. Circular sleeve; 8. Annular top sleeve; 9. Abutting tail handle; 10. Increasing diameter plate; 11. Arc rib; 12. Counterweight ring; 13. Second cylinder; 14. Force-bearing protrusion; 15. Counterweight plate; 16. Suspension platform; 17. Third cylinder; 18. Circular constriction groove; 19. Movable plate; 20. Rectangular groove; 21. Sliding buckle; 22. Secondary arm; 23. Limit switch; 24. Contact corner plate; 25. Top head; 26. Connecting plate; 27. Magnetic column; 28. Magnetic rod. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0019] like Figures 1-10 As shown, a force-increasing clamping mechanism includes: a cylinder 1 and a reference platform 2, the cylinder 1 is inverted, a connector 3 is mounted on the output shaft of the cylinder 1, at least one main arm 4 is set on the reference platform 2 and connected to the connector 3, and a downward pressing arm 5 is vertically set on the main arm 4. After the drive cylinder 1 is pushed down, all the main arms 4 are pushed down, and the pressing arm 5 also moves down until it contacts the die height adjustment mechanism and presses it down. The main arms 4 increase the pressure and transmit it downward through the pressing arm 5. The pressure of the cylinder 1 is multiplied by the mechanical structure, thereby achieving the effect of force amplification. It also increases the original single point of action of the cylinder 1 to multiple points of action, thereby effectively increasing the pressing clamping force without replacing it with a larger diameter cylinder 1. It obtains greater force without increasing the volume and occupying too much space in the forging equipment, and avoids excessive system working pressure, thus controlling operating costs. In addition, based on the pressure amplification of the cylinder 1, a second stage of pressurization can be performed to further increase the pressing clamping force and enhance the force amplification effect. It can also ensure that the die height adjustment mechanism is evenly subjected to the pressing clamping force, ensuring that the die height adjustment mechanism can be clamped and fixed, and the die height is locked securely. This prevents the die height from changing under huge impacts and vibrations, ensuring safe and high-quality forging.

[0020] Optionally, a side frame 6 is provided on the reference platform 2. A rotating shaft is provided on the side frame 6. One end of the main arm 4 is connected to the connector 3 through a ball joint, and the other end is connected to the rotating shaft on the side frame 6. The distance from the lower arm 5 to the side frame 6 is less than the distance from the lower arm 5 to the connector 3; When cylinder 1 starts, it causes the main arm 4 to swing via connector 3. Specifically, the output shaft of cylinder 1 extends downward, pushing the main arm 4 downward. Since the main arm 4 is connected to connector 3 via a ball joint, it can swing downward around the rotation axis on the side frame 6. As the main arm 4 swings downward, the lowering arm 5 moves downward simultaneously until it reaches the appropriate position on the mold height adjustment mechanism. During this process, because the lowering arm 5 is located between the side frame 6 and the output shaft of cylinder 1, and the horizontal distance between the lowering arm 5 and the side frame 6 is less than the horizontal distance between the lowering arm 5 and the output shaft of cylinder 1, the lowering arm 5 acts as a resistance. Furthermore, the horizontal distance between the lowering arm 5 and the output shaft of cylinder 1 is longer at this time, meaning the lever arm is longer, resulting in a stronger rotational effect. The force of cylinder 1 is amplified to the same multiple as the ratio of the horizontal distance between the lower pressure arm 5 and the side frame 6 and the horizontal distance between the lower pressure arm 5 and the output shaft of cylinder 1, thus multiplying the pressure of cylinder 1 to achieve the effect of force amplification. Furthermore, multiple main arms 4 can be connected through connector 3, and a corresponding number of lower pressure arms 5 can be configured, increasing the original single point of action of cylinder 1 to multiple points of action. Without replacing with a larger diameter cylinder 1, the lower clamping force is effectively increased. Greater force is obtained without increasing the volume or occupying too much space in the forging equipment, while avoiding excessive system working pressure and controlling operating costs. The position of the lower pressure arm 5 is pre-positioned so that it presses against the mold height adjustment mechanism at a position that can bear force and lock the structure of the mold height adjustment mechanism itself.

[0021] Optionally, the main arm 4 has a circular sleeve 7 near the side frame 6, through which the lower arm 5 passes. The top of the circular sleeve 7 is provided with an annular top sleeve 8, the inner side wall of the annular top sleeve 8 is chamfered, the lower arm 5 is equipped with an abutting tail handle 9 and a diameter increasing plate 10, the bottom of the abutting tail handle 9 has rounded corners, and the rounded corner surface is equipped with arc-shaped ribs 11, and the lower end of the lower arm 5 is equipped with a counterweight ring 12. Under the action of gravity, the bottom of the abutment 9 is inserted into the annular top sleeve 8, at which time the arc-shaped rib 11 is attached to the inner wall of the annular top sleeve 8. The diameter of the expanding plate 10 is larger than that of the circular sleeve 7 and is attached to its bottom. Under the combined effect of the weight of the lower pressure arm 5 and the weight increase of the counterweight ring 12, the lower pressure arm 5 is always subjected to sufficient gravity. When the main arm 4 swings, the lower pressure arm 5 begins to straighten under the action of gravity. Then it contacts the tail handle 9 and twists in the annular top sleeve 8 through the arc rib 11. Thus, it can adjust the angle of the lower pressure arm 5 synchronously with the swing of the main arm 4 to ensure that it is always vertical. This ensures that the lower pressure arm 5 can be pressed straight on the mold height adjustment mechanism, so that the bottom of the lower pressure arm 5 can be completely attached to the mold height adjustment mechanism, ensuring the downward clamping effect. This prevents the lower pressure arm 5 from tilting and only having line contact or a small amount of surface contact with the mold height adjustment mechanism, which would result in insufficient transmission of downward pressure. When the lowering arm 5 contacts the mold height adjustment mechanism, the self-adjustment is also restricted and ends. At this time, the main arm 4 continues to swing and presses on the diameter increasing plate 10 to press down the lowering arm 5, ensuring the normal transmission of pressure.

[0022] Optionally, the end pressure head 51 of the lowering arm 5 is connected to the main body through a ball joint. When the end pressure head 51 begins to contact the mold height adjustment mechanism, if the end pressure head 51 has not yet fully contacted the mold height adjustment mechanism, as the main arm 4 presses down the lowering arm 5, it can also make a slight self-adjustment under the action of the ball joint, further ensuring that the end pressure head 51 can fully contact the mold height adjustment mechanism to press it down.

[0023] Optionally, the pressing arm 5 is divided into an upper arm 52 and a lower arm 53. The upper arm 52 passes through the circular sleeve 7, and the lower arm 53 is fitted and slidably inserted into the upper arm 52. A second cylinder 13 is installed on the side of the upper arm 52, and a force-receiving protrusion 14 is installed on the lower arm 53. The output end of the second cylinder 13 is connected downward to the force-receiving protrusion 14. When the pressing arm 5 presses down the mold height adjustment mechanism with a predetermined pressure, the system maintains pressure, and the clamping force continues to exist to prevent the mold height adjustment mechanism from becoming loose and causing a change in the mold height. At this time, the second cylinder 13 is activated, and the lower arm 53 is forcibly pushed down through the force-receiving protrusion 14 to achieve two-stage pressurization and further increase the downward force to ensure that the mold height adjustment mechanism is pressed down more forcefully and the mold height is locked securely. Several counterweight plates 15 are provided on the upper arm 52 at the position opposite to the second cylinder 13. The counterweight plates 15 balance the weight of the second cylinder 13 and the force-bearing protrusion 14 on the other side to prevent the self-adjustment of the lower arm 5 from being affected and causing it to tilt, and to ensure that the lower arm 5 can remain as vertical as possible.

[0024] Optionally, a suspension platform 16 is installed on the bottom of the reference platform 2. A third cylinder 17 is fixed on the suspension platform 16. The output end of the third cylinder 17 is connected to a circular constriction groove 18, and the opening of the circular constriction groove 18 faces downward. A movable plate 19 is installed inside the circular constriction groove 18. Several rectangular grooves 20 are arranged in an array at the bottom of the movable plate 19. Sliding buckles 21 are installed in the several rectangular grooves 20 respectively. A secondary arm 22 is installed at the bottom of the sliding buckle 21. Several auxiliary booms 22 are located inside the lower boom 5; The movable plate 19 can rotate and move up and down within the circular constriction groove 18, and the sliding buckle 21 can slide linearly within the rectangular groove 20. When the end pressure head 51 presses down on the corner or edge of the mold height adjustment mechanism, the third cylinder 17 is activated to push the circular constriction groove 18 down until all the auxiliary arms 22 are pressed onto the mold height adjustment mechanism. This, combined with the end pressure head 51, presses down the mold height adjustment mechanism from both the outside and inside, ensuring that key parts of the mold height adjustment mechanism are pressed down as much as possible, guaranteeing uniform downward pressure, and ensuring that all parts of the mold height adjustment mechanism are pressed down, thus ensuring the structure of the mold height adjustment mechanism can be... The mold height adjustment mechanism is firmly locked to prevent it from loosening. Before starting the third cylinder 17, the positions of several auxiliary arms 22 are flexibly adjusted by holding the auxiliary arm 22 and pulling the sliding buckle 21 linearly within the rectangular groove 20 and rotating the movable plate 19 within the circular constriction groove 18, according to the specific dimensions and shape parameters of the mold height adjustment mechanism. This ensures that the mold height adjustment mechanism is pressed down from the optimal position. After the several auxiliary arms 22 contact the mold height adjustment mechanism, as the third cylinder 17 continues to push down, the sliding buckle 21 first abuts against the inner top wall of the rectangular groove 20, and then the movable plate 19 abuts against the inner top wall of the circular constriction groove 18, so that the several auxiliary arms 22 can press down on the mold height adjustment mechanism.

[0025] Optionally, a limit switch 23 is installed on the reference platform 2, and a contact plate 24 is installed on the side of the main arm 4. The contact plate 24 is aligned with the operating head of the limit switch 23. The limit switch 23 is connected to the cylinder 1 through a programmable logic controller. As the main arm 4 continues to swing, after the contact plate 24 touches the operating head of the limit switch 23, the limit switch 23 receives the information and immediately controls the cylinder 1 to stop in time, so as to obtain appropriate downward pressure and avoid excessive downward pressure that could damage the mold height adjustment mechanism.

[0026] Optionally, a top head 25 is provided on the reference platform 2, and a connecting plate 26 is installed on the main arm 4. The connecting plate 26 is aligned with the top head 25. The height of the top head 25 is slightly lower than the operating head of the limit switch 23. If the limit switch 23 fails, the top head 25 can promptly stop the main arm 4 from swinging down, forming a double limit protection to prevent excessive downward pressure.

[0027] Optionally, the upper arm 52 is equipped with a magnetic absorbing piece. Before pressing down, the lower arm 53 is pushed into the upper arm 52. At this time, the magnetic absorbing piece in the upper arm 52 can hold the lower arm 53. In this way, the fixed connection between the second cylinder 13 and the force-receiving protrusion 14 can be disconnected. When the cylinder 1 presses the end pressure head 51 onto the mold height adjustment mechanism with a predetermined pressure, the output end of the second cylinder 13 is close to the force-receiving protrusion 14, so that the second cylinder 13 and the lower arm 53 are separate, preventing the reaction force of the lower arm 53 from damaging the second cylinder 13. The circular groove 18 contains a magnetic column 27, and the movable plate 19 is annular and attached to the magnetic column 27. A magnetic rod 28 is provided in the rectangular groove 20. The sliding buckle 21 is sleeved on the magnetic rod 28. By holding the auxiliary arm 22 and applying force, the attraction of the magnetic column 27 and the magnetic rod 28 can be overcome, and the position of the auxiliary arm 22 can be adjusted. After adjustment, the magnetic column 27 will attract the movable plate 19, and the magnetic rod 28 will attract the sliding buckle 21, ensuring that the adjusted auxiliary arm 22 will not shift when approaching the mold height adjustment mechanism, and ensuring that several auxiliary arms 22 can press down on the mold height adjustment mechanism from the optimal clamping position.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A force-increasing clamping mechanism, characterized in that, include: A cylinder (1) and a reference platform (2), wherein the cylinder (1) is inverted, a connector (3) is mounted on the output shaft of the cylinder (1), at least one main arm (4) is set on the reference platform (2) and connected to the connector (3), and a downward pressure arm (5) is vertically set on the main arm (4). After driving the cylinder (1), all the main arms (4) are pushed down, and the pressure of the main arms (4) is increased and transmitted downward through the lowering arm (5).

2. The force-increasing clamping mechanism as described in claim 1, characterized in that: The reference platform (2) is provided with a side frame (6), and the side frame (6) has a rotating shaft. One end of the main arm (4) is connected to the connector (3) through a ball head, and the other end is connected to the rotating shaft on the side frame (6). The distance from the lowering arm (5) to the side frame (6) is less than the distance from the lowering arm (5) to the connector (3); When the cylinder (1) is started, the main arm (4) swings through the connector (3).

3. The force-increasing clamping mechanism as described in claim 2, characterized in that: The main arm (4) has a circular sleeve (7) near the side frame (6), through which the lower arm (5) passes. The top of the circular sleeve (7) is provided with an annular top sleeve (8), and the inner side wall of the annular top sleeve (8) is chamfered. The lower arm (5) is equipped with an abutting tail handle (9) and a diameter increasing plate (10). The bottom of the abutting tail handle (9) has rounded corners, and arc-shaped ribs (11) are installed on the rounded corner surface. The lower end of the lower arm (5) is equipped with a counterweight ring (12). Under the action of gravity, the bottom of the abutting tail (9) is inserted into the annular top sleeve (8), at which time the arc-shaped rib (11) is attached to the inner wall of the annular top sleeve (8). The diameter of the diameter-increasing disc (10) is larger than that of the circular sleeve (7) and is attached to its bottom.

4. The force-increasing clamping mechanism as described in claim 3, characterized in that: The end pressure head (51) of the lower pressure arm (5) is connected to the main body through a ball joint.

5. The force-increasing clamping mechanism as described in claim 4, characterized in that: The lowering arm (5) is divided into an upper arm (52) and a lower arm (53). The upper arm (52) passes through the circular sleeve (7), and the lower arm (53) is fitted and slidably inserted into the upper arm (52). A second cylinder (13) is installed on the side of the upper arm (52), and a force-receiving protrusion (14) is installed on the lower arm (53). The output end of the second cylinder (13) is connected downward to the force-receiving protrusion (14). Several counterweight plates (15) are provided on the upper arm (52) at the position opposite to the second cylinder (13).

6. The force-increasing clamping mechanism as described in claim 5, characterized in that: A suspension platform (16) is installed on the bottom of the reference platform (2). A third cylinder (17) is fixed on the suspension platform (16). The output end of the third cylinder (17) is connected to a circular converging groove (18), and the opening of the circular converging groove (18) faces downward. A movable plate (19) is assembled inside the circular converging groove (18). Several rectangular grooves (20) are arranged in an array at the bottom of the movable plate (19). Sliding buckles (21) are respectively assembled in the several rectangular grooves (20). A secondary arm (22) is installed at the bottom of the sliding buckle (21). Several of the auxiliary booms (22) are located inside the lower boom (5); The movable plate (19) can rotate and move up and down within the circular groove (18), and the sliding buckle (21) can slide linearly within the rectangular groove (20).

7. The force-increasing clamping mechanism as described in claim 6, characterized in that: A limit switch (23) is installed on the reference platform (2), and a touch angle plate (24) is installed on the side of the main arm (4), with the touch angle plate (24) aligned with the operating head of the limit switch (23).

8. The force-increasing clamping mechanism as described in claim 7, characterized in that: The reference platform (2) is provided with a top head (25), and the main arm (4) is equipped with a connecting plate (26), which is aligned with the top head (25).

9. The force-increasing clamping mechanism as described in claim 8, characterized in that: The upper arm (52) is provided with a magnetic absorbing piece; The circular groove (18) is equipped with a magnetic column (27), the movable plate (19) is annular, and the movable plate (19) is attached to the magnetic column (27); A magnetic rod (28) is provided in the rectangular groove (20), and the sliding buckle (21) is sleeved on the magnetic rod (28).

Images