Press machine slide mechanism

Abstract

The present application relates to the field of press, disclose a kind of press slide block mechanism, it includes along the sliding block of machine body, crankshaft, main connecting rod, swing arm, thrust link and force amplification switching assembly, swing arm two ends are respectively hinged with main connecting rod and thrust link, and the lower end of thrust link is movably connected with the top of sliding block. Force amplification switching assembly is automatically switched according to the connection state of sliding block and thrust link according to the working condition of sliding block: when stamping die head contacts workpiece, it drives both rigid connection, at this time, thrust link is vertical state, and main connecting rod and swing arm are inclined state, and force amplification stamping is realized by lever principle;When sliding block idle stroke lifts, the component makes both into floating connection, and idle resistance is greatly reduced. The present application is simple and reliable in structure, effectively realizes energy saving and the promotion of output force. The present application force amplification swing arm assembly constitutes lever structure, can amplify the force transmitted by main connecting rod;At the same time, when idle motion, it has the effect of high efficiency energy saving.

Description

Technical Field

[0001] This invention relates to the field of press technology, and more specifically, to a press slide mechanism. Background Technology

[0002] A press, also known as a punch press or crank press, is widely used in metal forming processes such as stamping and forging. Its core principle is to convert the rotary motion of a motor into the linear reciprocating motion of a slide block through a crank-connecting rod mechanism. In traditional crank presses, the slide driving force is entirely determined by the crankshaft torque and connecting rod geometry, limiting its nominal pressure (the maximum force the slide block can withstand when it reaches 20°~30° (pressure angle) before the bottom dead center). To obtain a higher nominal pressure, the crankshaft radius, connecting rod cross-section, and overall machine weight must be increased, resulting in bulky and expensive equipment. How to achieve greater output force in the critical stroke of stamping without increasing the dimensions of standard components or driving torque is a pressing problem that needs to be solved. Summary of the Invention

[0003] To address the problems mentioned above, the present invention provides a press slide mechanism, comprising a sliding block slidably disposed vertically on the machine body, a crankshaft located above the sliding block and rotatably mounted on the machine body, a main connecting rod hinged to the crankshaft, a force-amplifying swing arm assembly connected to the drive rod, and a force-amplifying switching component slidably disposed on the top of the sliding block. The sliding block is used for fixed installation of a stamping die head. Rotation of the crankshaft drives the main connecting rod to move the force-amplifying swing arm assembly, thereby causing the sliding block to move up and down. The force-amplifying arm assembly includes a swing arm and a thrust connecting rod. The swing arm is pivotally mounted on the machine body, and the swing arm... Both ends of the device are hinged to the main connecting rod and the thrust connecting rod, respectively, and the thrust connecting rod is movably connected to the top of the sliding block. The force-enhancing switching component is adapted to drive the connection between the thrust connecting rod and the sliding block to be either rigid or floating. When the stamping die contacts the product to be stamped, the force-enhancing switching component drives the connection between the thrust connecting rod and the sliding block to be rigid. When the stamping die is stamping the product to be stamped, the thrust connecting rod is in a vertical state, and the main connecting rod and the swing arm are both in an inclined state. When the sliding block moves up and down during idle stroke, the force-enhancing switching component drives the connection between the thrust connecting rod and the sliding block to be floating.

[0004] Optionally, the swing arm is provided with a pivot hole that pivots with the body, and the ratio of the length from the hinge point of the swing arm and the main connecting rod to the center of the pivot hole to the length from the hinge point of the swing arm and the thrust connecting rod to the center of the pivot hole is 1.5:1-2.5:1.

[0005] Optionally, the crankshaft includes a first horizontal shaft, a vertical shaft, and a second horizontal shaft that are fixedly connected. The first horizontal shaft and the second horizontal shaft are located at the upper and lower ends of the vertical shaft, respectively. The axis of the first horizontal shaft and the axis of the second horizontal shaft are two parallel lines. The first horizontal shaft is adapted to be connected to a drive motor, and the main connecting rod is rotatably sleeved on the second horizontal shaft.

[0006] Optionally, a hinge support is fixedly installed on the top of the sliding block, a hinge shaft is inserted into the hinge support, and the thrust connecting rod is provided with a hinge floating hole for the hinge shaft to be inserted and hinged. The diameter of the hinge floating hole is larger than the outer diameter of the hinge shaft and is in clearance fit with the hinge shaft. The bottom of the thrust connecting rod is spaced apart from the sliding block.

[0007] Optionally, the bottom of the thrust link is a plane, and the force-increasing switching component is adapted to be inserted into the bottom of the thrust link to lock the rotation of the thrust link relative to the sliding block, so that the connection between the thrust link and the sliding block is switched to a rigid connection, and two sets of the force-increasing switching components are symmetrically provided.

[0008] Optionally, the force-switching assembly includes a sliding locking block and a guide rod. The sliding locking block slides to one side of the thrust connecting rod, and the guide rod is installed on the side of the sliding locking block away from the thrust connecting rod and moves synchronously with the sliding locking block. A through plate is fixedly provided on the top of the sliding block for the guide rod to pass through and move. The machine body is provided with a driving inclined surface, which is located on the side of the guide rod away from the sliding locking block. When the stamping die head contacts the product to be stamped, the guide rod cooperates with the driving inclined surface so that the sliding locking block is inserted into the bottom of the thrust connecting rod and contacts the bottom surface of the thrust connecting rod.

[0009] Optionally, the top of the sliding block is provided with a sliding groove for the sliding locking block to be inserted and slid, the sliding groove does not penetrate the sliding block, and the top of the sliding locking block is provided with a locking slope that abuts against the thrust connecting rod.

[0010] Optionally, the guide rod is fitted with a tension spring, which is located between the through plate and the sliding locking block, and both ends of the tension spring are connected to the through plate and the sliding locking block respectively; when the force that drives the sliding locking block to move closer to the thrust link is removed, the tension spring is adapted to drive the sliding locking block to move closer to the through plate to unlock the rotation of the thrust link.

[0011] Optionally, the body is provided with a driving plane, which is located below the driving inclined surface. The driving plane is adapted to drive the sliding locking block to continuously maintain the locking state of the thrust connecting rod.

[0012] Optionally, a rolling wheel is rotatably connected to the side wall of the guide rod near the driving inclined surface, and the rolling wheel makes rolling contact with the driving inclined surface.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0014] 1. The swing arm is pivotally connected to the machine body to form a lever structure. The swing arm, together with the thrust connecting rod, can play a role similar to a two-stage lever structure. With the "rigid connection" in the working stroke, the force transmitted by the main connecting rod can be amplified by 1.5 to 2.5 times within the nominal pressure stroke. This allows the press, which uses a smaller power motor and a lighter crankshaft, to output a larger nominal pressure, resulting in a significant force-increasing effect. At the same time, compared with the traditional solution of simply increasing the crankshaft to obtain the same tonnage, the structure of this invention is more compact and the weight of the whole machine is significantly reduced.

[0015] 2. During idle stroke, the thrust connecting rod and the slider are floatingly connected. At this time, the lower end of the thrust connecting rod can move freely within a certain range at the top of the slider or only provide limited constraints. The swing arm mainly drives the slider to move by driving the thrust connecting rod, without applying a completely rigid thrust, thereby greatly reducing the resistance during idle stroke. With the addition of the force-enhancing swing arm, which has a structure with a different length ratio from the pivot center, a large torque is only required in the short-term stamping stage, which has the effect of high efficiency and energy saving.

[0016] 3. The increased nominal pressure stroke and adjustable lever ratio make this press particularly suitable for processes requiring low speed and high tonnage, such as thick plate punching, precision pressing, and embossing. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the press slide mechanism in an embodiment of the present invention;

[0018] Figure 2 This is a structural diagram of the crankshaft, main connecting rod, and force-multiplying swing arm assembly in an embodiment of the present invention;

[0019] Figure 3 This is a structural diagram of the sliding block, thrust link, and force switching assembly in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Sliding block; 11. Crankshaft; 12. Main connecting rod; 13. Hinge support; 14. Through plate; 15. Sliding groove; 2. Force-boosting swing arm assembly; 21. Swing arm; 211. Pivot hole; 22. Thrust connecting rod; 221. Hinge floating hole; 3. Force-boosting switching assembly; 31. Sliding locking block; 32. Guide rod; 33. Tension spring; 34. Roller. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the following description is provided in conjunction with the accompanying drawings. Figure 1-3 This application will be described in further detail.

[0022] This invention provides a press slide mechanism. Example 1: Refer to... Figure 1 The press slide mechanism includes a sliding block 1, a crankshaft 11 located above the sliding block 1, a main connecting rod 12, a force-amplifying swing arm assembly 2, and a force-amplifying switching component 3. A guide rail is provided on the machine body, and the sliding block 1 slides vertically in cooperation with the guide rail. The bottom of the sliding block 1 is suitable for mounting a stamping die head to stamp the product to be stamped. The crankshaft 11 is rotatably mounted on the machine body and connected to a drive motor mounted on the machine body to achieve rotation. The upper end of the main connecting rod 12 is hinged to the crankshaft 11 via a first pin, and the lower end of the main connecting rod 12 is hinged to the upper end of the force-amplifying swing arm assembly 2 via a second pin. A rotating shaft is fixedly mounted on the machine body, and the force-amplifying swing arm assembly 2 is rotatably sleeved on the rotating shaft. The force-amplifying swing arm assembly 2 is movably connected to the top of the sliding block 1, thus forming a lever structure to increase the stamping force. The rotation of the crankshaft 11 drives the main connecting rod 12 to move the force-amplifying swing arm assembly 2, thereby causing the sliding block 1 to move up and down. The force-boosting switching component 3 is slidably disposed on the top of the sliding block 1 and cooperates with the force-boosting swing arm assembly 2, driving the force-boosting swing arm assembly 2 to be rigidly connected or floatingly connected at the connection point of the sliding block 1.

[0023] When the stamping die contacts the product to be stamped, the force-enhancing switching component 3 drives the force-enhancing swing arm assembly 2 and the sliding block 1 to be rigidly connected. When the stamping die is stamping the product to be stamped, the thrust connecting rod 22 is in a vertical state, and the main connecting rod 12 and the swing arm 21 are in an inclined state. The crankshaft 11 continues to rotate, which will increase the stamping force on the product to be stamped. When the sliding block 1 moves up and down during idle stroke, the force-enhancing switching component 3 drives the force-enhancing swing arm assembly 2 and the sliding block 1 to be floatingly connected. The driving component that drives the crankshaft 11 to rotate can use a small driving force to move the sliding block 1. Only in the short-term stamping stage is a large torque required, thus achieving a high-efficiency and energy-saving effect.

[0024] Reference Figure 1 and Figure 2 The crankshaft 11 includes a first horizontal shaft, a vertical shaft, and a second horizontal shaft fixedly connected. Two vertical shafts and two horizontal shafts are symmetrically arranged, located at opposite ends of the first horizontal shaft. The first and second horizontal shafts are located at the upper and lower ends of the vertical shaft, respectively, and the axes of the first and second horizontal shafts are parallel lines. The first horizontal shaft is suitable for connection to a drive motor, and the main connecting rod 12 is rotatably sleeved on the second horizontal shaft. During installation, the main connecting rod 12 is first sleeved onto the first horizontal shaft from its end, and then rotatably sleeved onto the second horizontal shaft through the vertical shaft. Thus, rotation of the crankshaft 11 will drive the main connecting rod 12 to rise and fall.

[0025] Reference Figure 1 and Figure 2The lever arm assembly includes a swing arm 21 and a thrust link 22. The swing arm 21 is rotatably mounted on the rotating shaft to achieve a pivotal connection with the machine body. The upper and lower ends of the swing arm 21 are respectively hinged to the main link 12 and the thrust link 22. The lower end of the thrust link 22 is movably connected to the top of the sliding block 1.

[0026] The swing arm 21 is made of cast steel (material ZG310-570, heat-treated), thus possessing good strength. The swing arm 21 has a pivot hole 211 fitted onto the rotating shaft. The ratio of the length (L1) from the hinge point of the swing arm 21 to the center of the pivot hole 211 to the length (L2) from the hinge point of the swing arm 21 to the center of the pivot hole 211 is 1.5:1-2.5:1. If the ratio is lower than 1.5:1, the force-increasing effect is not significant, and the advantages of energy saving and force increase are lost; if the ratio is higher than 2.5:1, the fulcrum shaft and bearings will bear excessive reaction force, making the swing arm 21 structure bulky and reducing its economic efficiency. In this embodiment, L1=500mm; L2=250mm, that is, the leverage ratio L1:L2=2:1, which achieves the best balance between significant force-increasing effect and reasonable structural load.

[0027] Reference Figures 1 to 3 A hinge support 13 is fixedly installed on the top of the sliding block 1, and a hinge shaft is inserted into the hinge support 13. The thrust connecting rod 22 is provided with a hinge floating hole 221 for the hinge shaft to be inserted and hinged, so that the sliding block 1 and the thrust connecting rod 22 are hingedly connected. The bottom of the thrust connecting rod 22 is spaced apart from the sliding block 1, thereby ensuring that the thrust connecting rod 22 has space for hinged swing. The force amplification switching assembly 3 is adapted to drive the connection between the thrust connecting rod 22 and the sliding block 1 to be either a rigid connection or a floating connection.

[0028] Specifically, the diameter of the hinged floating hole 221 is larger than the outer diameter of the hinge shaft, forming a clearance fit. This clearance is preferably 0.5mm-1.5mm, and in this embodiment, it is preferably 1.0mm. In the floating connection state, this clearance allows the lower end of the thrust connecting rod 22 to have a small degree of freedom relative to the hinge shaft, ensuring that the force-enhancing swing arm system does not rigidly constrain the slider during idle stroke, thus truly achieving force saving. Too small a clearance may lead to mis-locking or friction, while too large a clearance may cause unstable slider movement or generate impact noise.

[0029] Reference Figures 1 to 3 The bottom of the thrust link 22 is flat. The force amplification switching assembly 3 is suitable for being inserted into the bottom of the thrust link 22 to lock the rotation of the thrust link 22 relative to the sliding block 1, so that the connection between the thrust link 22 and the sliding block 1 is switched to a rigid connection. Two sets of force amplification switching assemblies 3 are symmetrically arranged, and the two sets of force amplification switching assemblies 3 are located on the left and right sides of the thrust link 22 to lock the thrust link 22 evenly and avoid the off-center load caused by unilateral locking.

[0030] The force-boosting switching assembly 3 includes a sliding locking block 31 and a guide rod 32. The sliding locking block 31 is slidably disposed on one side of the thrust connecting rod 22. The guide rod 32 is fixedly installed on the side of the sliding locking block 31 away from the thrust connecting rod 22 and moves synchronously with the sliding locking block 31. A through plate 14 is fixedly provided on the top of the sliding block 1 for the guide rod 32 to pass through and guide its movement. A sliding groove 15 is milled on the top of the sliding block 1, and the sliding locking block 31 can slide stably and orientedly within the sliding groove 15 in a direction perpendicular to the axis of the thrust connecting rod 22. A locking inclined surface is provided on the top of the sliding locking block 31, which abuts against the bottom surface of the thrust connecting rod 22. A driving inclined surface (or trigger rail) is fixedly provided on the machine body. When the stamping die head contacts the product to be stamped and the movement of the slide block is obstructed, the driving inclined surface fixed to the machine body and the guide rod 32 that moves down with the slide block move relative to each other and interact with each other, pushing the guide rod 32 and the sliding locking block 31 to move towards the thrust connecting rod 22 until the sliding locking block 31 is inserted into the bottom of the thrust connecting rod 22. The locking inclined surface at the top of the sliding locking block 31 is in close contact with the bottom surface of the thrust connecting rod 22, completing rigid locking and locking the rotation of the thrust connecting rod 22 relative to the sliding block 1.

[0031] Reference Figures 1 to 3 A tension spring 33 is fitted onto the guide rod 32. The tension spring 33 is located between the through plate 14 and the sliding locking block 31, and its two ends are hooked to the through plate 14 and the sliding locking block 31, respectively. When the slider returns upward, the interaction force between the guide rod 32 and the driving inclined surface is removed. The restoring force provided by the tension spring 33 can actively and reliably drive the sliding locking block 31 to move away from the thrust link 22, thereby releasing the lock and automatically resetting the mechanism to the floating connection state, preparing for the next working cycle, ensuring fully automatic switching and reliable cycle. When the sliding locking block 31 moves away from the thrust link 22 under the action of the tension spring 33 to completely unlock the thrust link 22, the sliding locking block 31 will abut against the groove wall at the end of the sliding groove 15 and be limited.

[0032] A rolling wheel 34 is rotatably connected to the side wall of the guide rod 32 near the drive ramp, and the rolling wheel 34 makes rolling contact with the drive ramp. Furthermore, a drive plane is also provided on the machine body, located below the drive ramp. After the sliding locking block 31 completes locking, the rolling wheel 34 at the end of the guide rod 32 will enter and remain on this drive plane. Thus, during the stamping holding and initial return phases, it can continuously keep the sliding locking block 31 in the locked position, ensuring a stable locking state throughout the entire force-increasing stamping stroke, preventing accidental unlocking due to vibration or force changes, greatly improving operational reliability. Simultaneously, the rolling wheel 34 transforms the sliding friction between the guide rod 32 and the drive ramp into rolling friction, significantly reducing frictional resistance during switching, making locking and unlocking actions smoother and more sensitive, reducing component wear, and improving mechanism lifespan and response accuracy.

[0033] The implementation principle of a press slide mechanism according to an embodiment of this application is as follows: When not pressing, the sliding block 1 is at the top dead center, and the rolling wheel 34 is located at the uppermost end of the driving inclined plane. Under the action of the tension spring 33, the sliding locking block 31 is in a fully retracted state, and its locking inclined plane is away from the thrust connecting rod 22. During the idle downward stroke, the crankshaft 11 begins to rotate, and the main connecting rod 12 pulls the driving arm end of the swing arm 21, causing the entire swing arm 21 to swing counterclockwise around the fulcrum. The driven arm end of the swing arm 21 pushes the slide downward through the thrust connecting rod 22. At this stage, since there is a gap between the hinged floating hole 221 at the lower end of the thrust link 22 and the hinge shaft, the thrust link 22 and the sliding block 1 are essentially in a "floating hinge" relationship. The lower end of the thrust link 22 can move freely within a certain range at the top of the sliding block 1 or only provide limited constraints. The main function of the thrust link 22 is to guide and drive the movement of the sliding block 1, rather than to apply a completely rigid thrust. Therefore, the drive system only needs to overcome the weight, friction and inertial force of the sliding block 1, which greatly reduces the load and achieves energy saving.

[0034] As the sliding block 1 descends, the moment the stamping die contacts the product to be stamped, the movement of the sliding block 1 encounters enormous resistance, causing its speed to drop sharply. However, the drive ramp fixed to the machine body is stationary. Since the sliding block 1 is almost stopped while the crankshaft 11 is still rotating, the main connecting rod 12 and the swing arm 21 continue to move, causing the thrust connecting rod 22 to continue its downward movement. This causes the rolling wheel 34, which descends with the sliding block 1, to push the guide rod 32 and the sliding locking block 31 against the tension of the tension spring 33, moving horizontally towards the thrust connecting rod 22 under the action of the drive ramp. When the rolling wheel 34 completely passes the drive ramp and enters the drive plane area, the sliding locking block 31 is completely inserted below the bottom plane of the thrust connecting rod 22. The locking ramp is in close contact with the bottom plane; at this time, the degree of freedom of the lower end of the thrust connecting rod 22 to rotate around the hinge axis is completely restricted, and its connection with the sliding block 1 changes from a "floating hinge" to a "rigid lock".

[0035] Subsequently, crankshaft 11 continues to rotate to near bottom dead center (nominal pressure stroke). The tension F1 of the main connecting rod 12 acts on the swing arm 21, generating a torque M1 = F1 × L1 × sinθ1 on the rotation axis, where θ1 is the angle between the driving arm and the vertical direction at this time, approximately 25°. This torque must be balanced with the shorter torque of the swing arm 21, i.e., M2 = F2 × L2 × sinθ2, where F2 is the pressure of the thrust connecting rod 22, and θ2 is the angle between the driven arm and the vertical direction, approximately 8°. Since the thrust connecting rod 22 is locked, its pressure F2 will be completely converted into a downward load on the sliding block 1. Based on torque balance: F1×L1×sinθ1=F2×L2×sinθ2, substituting into the numerical calculation of force gain: F2 / F1=(L1×sinθ1) / (L2×sinθ2)=(500×sin25°) / (250×sin8°)≈(500×0.4226) / (250×0.1392)≈6.07 (theoretical static gain). Considering mechanism friction, elastic deformation, etc., the actual dynamic gain is about 70%-80% of the theoretical value, that is, about 4.25-4.86 times. This means that if the tension of the main connecting rod 12 is 400kN (about 40 tons), the slider pressure of about 1700-1940kN (about 170-194 tons) can be generated through this mechanism, and the force amplification effect is extremely significant.

[0036] After stamping is completed, crankshaft 11 drives main connecting rod 12 to push swing arm 21 in the opposite direction, and slider 1 begins its return stroke. At the beginning of the return stroke, rolling wheel 34 moves from the driving plane to the lower edge of the driving ramp. As the blocking effect of the driving ramp disappears, under the strong restoring force of tension spring 33, sliding locking block 31 is quickly pulled back, disengaging from contact with the bottom plane of thrust connecting rod 22. The lower end of thrust connecting rod 22 regains its floating ability around the hinge axis, and the mechanism switches back to the "floating connection" effort-saving mode. The slider moves upward under light load under the drive of swing arm 21 until it returns to the top dead center, completing one working cycle.

[0037] Example 2: To adapt to the force amplification ratio requirements of different processes, the swing arm 21 is designed as a modular structure. Specifically, the swing arm 21 is provided with multiple pivot holes 211 at different positions. By replacing the thrust connecting rod 22 of different lengths or adjusting its connection with different pivot holes 211, the effective lever ratio (L1 / L2) can be changed, thereby adjusting the force amplification characteristics of the mechanism.

[0038] Example 3: The driving method of the force-switching component 3 is not limited to the mechanical triggering of the rolling wheel 34 and the driving ramp. As an equivalent replacement, a mechanical overload protector (such as a shear pin structure or a spring force-sensitive mechanism) that can sense the tension of the main connecting rod 12 or the obstruction pressure of the sliding block 1 can be installed on the sliding block 1. When the pressure reaches a set threshold, the protector releases the stored energy (such as the compressed spring) or directly pushes the sliding locking block 31 to complete the locking action through the linkage mechanism.

[0039] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A press slide mechanism, characterized in that: The system includes a sliding block (1) that slides vertically on the machine body, a crankshaft (11) located above the sliding block (1) and rotatably mounted on the machine body, a main connecting rod (12) hinged to the crankshaft (11), a force-amplifying swing arm assembly (2) connected to the main connecting rod, and a force-amplifying switching component (3) that slides on the top of the sliding block (1). The sliding block (1) is used for fixing the stamping die head. The rotation of the crankshaft (11) will drive the main connecting rod (12) to drive the force-amplifying swing arm assembly (2) to move, thereby driving the sliding block (1) to move up and down. The force-amplifying swing arm assembly includes a swing arm (21) and a thrust connecting rod (22). The swing arm (21) is pivotally mounted on the machine body, and the two ends of the swing arm (21) are respectively connected to the main connecting rod (12). The thrust connecting rod (22) is hinged to the sliding block (1), and the thrust connecting rod (22) is movably connected to the top of the sliding block (1). The force-enhancing switching component (3) is adapted to drive the connection between the thrust connecting rod (22) and the sliding block (1) to be rigidly connected or floatingly connected. When the stamping die head contacts the product to be stamped, the force-enhancing switching component (3) drives the connection between the thrust connecting rod (22) and the sliding block (1) to be rigidly connected. When the stamping die head stamps the product to be stamped, the thrust connecting rod (22) is in a vertical state, and the main connecting rod (12) and the swing arm (21) are both in an inclined state. When the sliding block (1) moves up and down during idle stroke, the force-enhancing switching component (3) drives the connection between the thrust connecting rod (22) and the sliding block (1) to be floatingly connected.

2. The press slide mechanism according to claim 1, characterized in that: The swing arm (21) is provided with a pivot hole (211) that pivots with the body. The ratio of the length from the hinge point of the swing arm (21) to the center of the pivot hole (211) to the length from the hinge point of the swing arm (21) to the center of the pivot hole (211) is 1.5:1-2.5:

1.

3. The press slide mechanism according to claim 1, characterized in that: The crankshaft (11) includes a first horizontal shaft, a vertical shaft and a second horizontal shaft that are fixedly connected. The first horizontal shaft and the second horizontal shaft are located at the upper and lower ends of the vertical shaft, respectively. The axis of the first horizontal shaft and the axis of the second horizontal shaft are two parallel lines. The first horizontal shaft is adapted to be connected to a drive motor. The main connecting rod (12) is rotatably sleeved on the second horizontal shaft.

4. The press slide mechanism according to claim 1, characterized in that: The top of the sliding block (1) is fixedly installed with a hinge support (13), and a hinge shaft is inserted into the hinge support (13). The thrust connecting rod (22) is provided with a hinge floating hole (221) for the hinge shaft to be inserted and hinged. The diameter of the hinge floating hole (221) is larger than the outer diameter of the hinge shaft and is in clearance fit with the hinge shaft. The bottom of the thrust connecting rod (22) is spaced apart from the sliding block (1).

5. The press slide mechanism according to claim 4, characterized in that: The bottom of the thrust link (22) is flat. The force-increasing switching component (3) is adapted to be inserted into the bottom of the thrust link (22) to lock the rotation of the thrust link (22) relative to the sliding block (1), so that the connection between the thrust link (22) and the sliding block (1) is switched to a rigid connection. The force-increasing switching component (3) is symmetrically provided in two sets.

6. The press slide mechanism according to claim 4, characterized in that: The force-switching assembly (3) includes a sliding locking block (31) and a guide rod (32). The sliding locking block (31) slides on one side of the thrust connecting rod (22). The guide rod (32) is installed on the side of the sliding locking block (31) away from the thrust connecting rod (22) and moves synchronously with the sliding locking block (31). The top of the sliding block (1) is fixedly provided with a through plate (14) for the guide rod (32) to pass through and move. The machine body is provided with a driving inclined surface. The driving inclined surface is located on the side of the guide rod (32) away from the sliding locking block (31). When the stamping die head contacts the product to be stamped, the guide rod (32) cooperates with the driving inclined surface so that the sliding locking block is inserted into the bottom of the thrust connecting rod (22) and contacts the bottom surface of the thrust connecting rod (22).

7. The press slide mechanism according to claim 6, characterized in that: The top of the sliding block (1) is provided with a sliding groove (15) for the sliding locking block (31) to be inserted and slid. The sliding groove (15) does not penetrate the sliding block (1). The top of the sliding locking block (31) is provided with a locking slope that abuts against the thrust connecting rod (22).

8. The press slide mechanism according to claim 6, characterized in that: The guide rod (32) is fitted with a tension spring (33), which is located between the through plate (14) and the sliding locking block (31). The two ends of the tension spring (33) are respectively connected to the through plate (14) and the sliding locking block (31). When the force that drives the sliding locking block (31) to move closer to the thrust link (22) is removed, the tension spring (33) is adapted to drive the sliding locking block (31) to move closer to the through plate (14) to unlock the rotation of the thrust link (22).

9. The press slide mechanism according to claim 6, characterized in that: The body is provided with a driving plane, which is located below the driving inclined surface. The driving plane is adapted to drive the sliding locking block (31) to continuously keep the thrust connecting rod (22) locked.

10. The press slide mechanism according to claim 6, characterized in that: The guide rod (32) is rotatably connected to a rolling wheel (34) on the side wall near the driving inclined surface, and the rolling wheel (34) makes rolling contact with the driving inclined surface.

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