A crankshaft-type double-point multi-link press

Abstract

This invention discloses a crankshaft-type dual-point multi-link press, relating to the field of press technology. It includes a support table, table body, crankshaft assembly, trolley assembly, and track. The crankshaft assembly includes a motor, transmission gears, a large gear, and a crank-connecting rod mechanism to achieve a "slow down, fast up" stamping motion. The trolley assembly includes a geared motor, drive wheels, and track cleaning blades to achieve smooth transfer of the entire machine and track cleaning. Anti-eccentric load devices are provided on both sides of the crankshaft assembly. These devices include a connecting drive assembly, a guiding and stabilizing assembly, and a clamping support assembly. This invention uses the sliding block to trigger the connecting drive assembly when it descends, which, in conjunction with the multi-link, achieves eccentric load compensation. The guiding and stabilizing assembly provides high-precision vertical guidance, and the clamping support assembly dynamically clamps the guiding structure during the stamping process. The entire machine has a compact structure, stable operation, high stamping accuracy, and strong anti-eccentric load capability.

Description

Technical Field

[0001] This invention relates to the field of press technology, specifically to a crankshaft-type double-point multi-link press. Background Technology

[0002] As a key piece of equipment in metal plastic forming, the press is highly favored, especially the crankshaft multi-link press, because it can achieve the ideal "slow down, fast up" motion characteristics. That is, the working speed is slower to facilitate material forming, while the return speed is faster to improve production efficiency. However, while pursuing high speed and high efficiency, the traditional crankshaft press also faces several technical bottlenecks. On the one hand, its drive system usually adopts single-point or simple multi-point transmission, and it is difficult to accurately guarantee the synchronization of the left and right sides. Under high-speed and heavy-load conditions, the asynchronous power transmission can easily generate additional torque and vibration, which not only affects the consistency and precision of the stamped parts, but also aggravates the wear of transmission components such as crankshafts and gears, thus restricting the further improvement of equipment life and production cycle.

[0003] On the other hand, in actual stamping operations, presses are prone to off-center loading due to factors such as die installation deviations, asymmetrical workpiece placement, or uneven material thickness. Off-center loading causes the slider to bear asymmetrical lateral forces, and the press column to bear additional bending stress. Long-term operation will cause abnormal wear of the guide rails, slider movement jamming, and even machine body deformation, which seriously affects the operational stability, processing accuracy, and reliability of the equipment. In existing technologies, although the impact of off-center loading can be mitigated by strengthening the machine body structure or setting simple guiding mechanisms, most of them are passive bearing or static compensation, which is difficult to achieve dynamic and real-time off-center loading suppression in high-speed continuous stamping processes. It is difficult to fundamentally solve the negative impact of off-center loading on the accuracy and life of the equipment.

[0004] Therefore, there is an urgent need for a crankshaft press that combines efficient "slow at the bottom and fast at the top" stamping characteristics, excellent dynamic anti-eccentric load capability, and reliable autonomous load transfer function. Summary of the Invention

[0005] The purpose of this invention is to provide a crankshaft-type dual-point multi-link press to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a crankshaft-type double-point multi-link press, comprising a support platform, a platform body, a crankshaft assembly, a trolley assembly, and rails. The platform body is disposed at the upper end of the support platform, the crankshaft assembly is installed inside the upper end of the platform body, and the trolley assembly is installed inside the lower end of the platform body. Rails are connected to both sides of the bottom of the trolley assembly, and the rails on both sides connect to the outer sides of the lower end of the platform body. The press also includes anti-eccentricity devices disposed on both sides of the crankshaft assembly. Each anti-eccentricity device includes a connecting drive assembly, which is installed on the left and right sides of the crankshaft assembly. A first movable plate is disposed at the upper end of one side of the connecting drive assembly. First connecting rods are rotatably connected to both sides of the upper end of the first movable plate. A fixed plate is provided opposite to the upper end of the first movable plate and is locked to the inside of the platform. Second connecting rods are rotatably connected to the upper ends of the first connecting rods on both sides. The interior of the second connecting rod is rotatably connected to the fixed plate, and the other side of the second connecting rod is rotatably connected to a third connecting rod. The bottom of the third connecting rod is rotatably connected to the second movable plate, and the four sides of the second movable plate are slidably connected to the inside of the platform. Guide and stabilizing components are installed on both sides of the bottom of the first movable plate. A pressing and supporting component is provided in the middle of the lower end of the first movable plate. The lower ends of the guide and stabilizing components and the pressing and supporting components are connected to the inside of the second movable plate.

[0007] Preferably, the connecting drive assembly includes a connecting strip, which is bolted to the side of the trolley assembly. A mating plate is attached to the outside of the connecting strip, and the upper end of the mating plate is locked to the first moving plate. Guide frames are provided on both sides of the mating plate, and guide rods are provided inside the guide frames. Springs are installed on the outside of the guide rods, and a moving block is provided on the outside of the upper end of the guide rods. The moving block is slidably connected to the outside of the guide rods, and the bottom of the moving block is connected to the spring. The outside of the moving block is connected to the first moving plate.

[0008] Preferably, the guiding and stabilizing component includes a stabilizing guide rail, which is bolted to the lower end of the first moving plate, and the bottom of the stabilizing guide rail is inserted into the interior of the second moving plate. A guide groove is provided in the middle of one side of the stabilizing guide rail, and a movable connecting block is slidably connected inside the guide groove. The four sides of the movable connecting block are locked to the interior of the platform.

[0009] Preferably, the movable connecting block includes a connecting block body, and connecting blocks are fixed on all four sides of the outer side of the connecting block body. The connecting blocks are locked to the inside of the platform body. A wear-resistant shell is locked on the side of the connecting block body near the stable guide rail, and the wear-resistant shell is slidably embedded in the guide groove.

[0010] Preferably, the clamping support assembly includes a plug plate, which is located at the lower center of the first movable plate. The plug plate has transmission grooves on both outer sides, and clamping structures are connected to the lower ends of the transmission grooves on both sides.

[0011] Preferably, the clamping structure includes a mating shell, which is located at the lower end of the plug-in plate. Both ends of one side of the mating shell are connected to connecting shafts, and both connecting shafts are slidably connected to the inside of the transmission groove. A clamping spring is installed inside the mating shell, and a plug-in shaft is inserted inside the mating shell. One side of the plug-in shaft is connected to the clamping spring, and a pressure plate is installed on the other side of the plug-in shaft. The pressure plate is embedded inside the side of the stabilizing guide rail and is located inside the second moving plate.

[0012] Preferably, the crankshaft assembly includes a motor, which is mounted on one side of the upper end of the platform. The output end of the motor is connected to a pulley via a belt. A drive shaft is connected to the middle of the pulley. A bracket is mounted on one side of the drive shaft and is connected to the outside of the platform. The other side of the drive shaft is meshed with a drive gear. The drive gear has bias plates on both its front and rear sides, and a convex shaft passes between the bias plates on both sides. A first connecting arm is connected to the outside of one side of the convex shaft, and a second connecting arm is connected to the outer end of the first connecting arm. The second connecting arm is connected to the drive gear via a shaft body. A crank-connecting rod mechanism is connected to the other side of the convex shaft. A slider is connected to the bottom of the crank-connecting rod mechanism. The slider is slidably connected to the platform via a guide rail. A stamping template is provided at the bottom of the slider. A large gear is mounted on the rear side of the crank-connecting rod mechanism, and the large gears are symmetrically arranged and meshed.

[0013] Preferably, the trolley assembly includes a trolley body located at the lower end of the platform. A reduction motor is installed inside the trolley body and mounted on one side of the adapter plate. The output end of the reduction motor is connected to a universal joint. The universal joint is symmetrically arranged along the interior of the trolley body. Both sides of the trolley body are connected to a gear shaft. A drive gear meshes with the lower end of the gear shaft. A drive wheel is connected to the middle side of the drive gear via a shaft. The drive wheel is connected to the upper end of the track. A track cleaning plate is provided opposite to the lower end of the drive wheel and is locked to the bottom of the trolley body.

[0014] Preferably, the longitudinal width of the connecting strip is greater than the longitudinal width of the bottom of the mating plate, and there is a gap between the connecting strip and the bottom of the mating plate.

[0015] Preferably, the wear-resistant shell is composed of a titanium alloy layer, a nickel-based high-temperature alloy layer, and a tungsten carbide-cobalt composite coating from the inside out.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention, by setting up a crankshaft assembly, wherein the motor drives the transmission gear to rotate via a belt, drives the first connecting arm and the second connecting arm via the biased shaft plate and the cam shaft, and then drives the crank connecting rod mechanism to move, so that the slider achieves a specific stamping speed curve of "slow down and fast up", ensuring the synchronization and balance of power on the left and right sides, effectively avoiding the deformation and vibration of the mechanism caused by uneven force on one side, and the "slow down" stage is conducive to the full plastic deformation of the material and improves the forming accuracy, while the "fast up" stage improves the idle stroke efficiency, significantly enhancing the stability of the stamping process, processing quality and overall production efficiency.

[0018] 2. This invention, through the setting of a trolley assembly, wherein the reduction motor transmits power to symmetrically distributed gear shafts via a universal joint, driving the gears to drive the drive wheels to roll on the track, achieving smooth transfer. At the same time, the track cleaning blades fixed to the bottom of the trolley body move with the drive wheels, continuously scraping away dust, oil, and other debris from the track surface. This provides flexible workstation adjustment capability, improves the automatic cleaning function to ensure the cleanliness of the track contact surface, effectively prevents increased walking resistance, slippage, or positioning deviation caused by debris accumulation, and ensures the reliability and low maintenance of the transfer process.

[0019] 3. This invention incorporates an anti-eccentric load device. When the slider descends for stamping, the first moving plate is triggered to move downward by connecting the drive assembly. This, in turn, drives the multi-link mechanism consisting of the first connecting rod, the second connecting rod, the third connecting rod, and the fixed plate to move. This converts the downward motion of the first moving plate into the upward motion of the second moving plate. In conjunction with the guide and stabilizing assembly and the clamping support assembly, this significantly reduces the problem of eccentric load during slider stamping and greatly improves the operational stability, stamping accuracy, and service life of the equipment under high-speed and heavy-load conditions.

[0020] 4. This invention, by setting up a connecting drive component, specifically a connecting strip fixed to the side of the slider, has a longitudinal width greater than the bottom width of the docking plate and a preset gap between them. In the initial stage of the slider's descent, the connecting strip and the docking plate do not contact each other, and the anti-eccentric load device does not activate. When the slider descends to a specific stage, the bottom of the connecting strip contacts the bottom of the docking plate and pushes the latter, along with the first moving plate, downward. In this way, the anti-eccentric load function is precisely activated in the critical stage of stamping, so that the compensation force acts on the situation where the eccentric load needs to be balanced the most. At the same time, the combination of the guide rod, spring, and moving block provides vertical guidance and elastic reset function for the first moving plate, ensuring the smoothness of the linkage process and the accuracy of the reset, making the entire triggering and reset cycle efficient and reliable.

[0021] 5. This invention, by setting up a guiding and stabilizing component, namely a stabilizing guide rail fixed to the first moving plate, with its guide groove and the wear-resistant shell in the moving block fixed to the platform forming a sliding pair, restricts the relative displacement of the first and second moving plates in the vertical direction, effectively preventing lateral swaying or torsion, ensuring the accuracy of the motion trajectory of the multi-link mechanism, and thus ensuring the accuracy of the off-center load compensation direction. Furthermore, the wear-resistant shell adopts a composite structure of titanium alloy layer, nickel-based high-temperature alloy layer and tungsten carbide-cobalt composite coating, taking into account the toughness of the substrate, high-temperature strength and extreme surface wear resistance from the inside out, and can withstand the friction and impact of high-speed sliding for a long time, greatly extending the service life and reducing the maintenance problem of increased guide clearance due to wear, which affects the compensation accuracy.

[0022] 6. The present invention, by setting up a clamping support assembly, wherein when the plug plate moves down with the first moving plate, the inclined transmission grooves on both sides drive the connecting shaft and the clamping structure as a whole to move towards the side of the stable guide rail. The clamping spring continuously presses the pressure plate against the side of the stable guide rail through the plug shaft. This clamping force dynamically increases as the first moving plate moves down. During the stamping operation, the guide gap is eliminated, providing extremely high system rigidity and ensuring the accurate transmission of stamping force and the stability of the guide. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the crankshaft assembly of the present invention;

[0025] Figure 3 This is a schematic diagram of the three-dimensional internal structure of the crankshaft assembly of the present invention;

[0026] Figure 4 This is a front view of the internal structure of the trolley assembly of the present invention;

[0027] Figure 5 This is a three-dimensional structural diagram of the anti-eccentric loading device of the present invention;

[0028] Figure 6 This is a three-dimensional structural diagram of the connection driving component of the present invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the guiding and stabilizing component of the present invention;

[0030] Figure 8 This is a schematic diagram of the disassembled movable connector structure of the present invention;

[0031] Figure 9 This is a three-dimensional structural diagram of the clamping support component of the present invention;

[0032] Figure 10 This is a schematic diagram of the internal structure of the clamping support component of the present invention in cross-section;

[0033] Figure 11 This is a schematic diagram of the disassembled clamping structure of the present invention.

[0034] In the diagram: Support platform-1, Platform body-2, Crankshaft assembly-3, Motor-31, Pulley-32, Drive shaft-33, Bracket-34, Drive gear-35, Offset shaft plate-36, Cam shaft-37, First connecting arm-38, Second connecting arm-39, Crank connecting rod mechanism-310, Slider-311, Stamping template-312, Large gear-313, Trolley assembly-4, Trolley body-41, Gear motor-42, Adapter plate-43, Universal joint-44, Gear shaft-45, Drive gear-46, Drive wheel-47, Track cleaning plate-48, Track-5, Anti-eccentric load device-6, Connecting drive assembly-61, Connecting strip-611, Docking plate- 612, Guide frame - 613, Guide rod - 614, Spring - 615, Moving block - 616, First moving plate - 62, First connecting rod - 63, Fixed plate - 64, Second connecting rod - 65, Third connecting rod - 66, Second moving plate - 67, Guide stabilizing assembly - 68, Stabilizing guide rail - 681, Guide groove - 682, Moving connecting block - 683, Connecting block body - 6831, Connecting block - 6832, Wear-resistant housing - 6833, Pressing support assembly - 69, Insert plate - 691, Transmission groove - 692, Pressing structure - 693, Docking shell - 6931, Connecting shaft - 6932, Pressing spring - 6933, Insert shaft - 6934, Pressure plate - 6935. Detailed Implementation

[0035] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0036] Please see Figure 1 This invention provides a crankshaft-type double-point multi-link press, including a support platform 1, a platform body 2, a crankshaft assembly 3, a trolley assembly 4, and a track 5. The support platform 1 serves as the basic load-bearing structure of the entire machine, with the platform body 2 fixedly installed on top of it. The crankshaft assembly 3 for performing the stamping action is installed inside the upper end of the platform body 2, and the trolley assembly 4 for movement is installed inside the lower end. The bottom two sides of the trolley assembly 4 are respectively connected to the track 5, and the track 5 is also connected to the outer side of the lower end of the platform body 2, providing a stable travel path for movement. The two side tracks 5 are connected to the outer side of the lower end of the platform body 2. It also includes anti-eccentric load devices 6 on both sides of the crankshaft assembly 3. The anti-eccentric load devices 6 are used to dynamically suppress and compensate for the eccentric load phenomenon generated during the stamping process, ensuring smooth movement of the crankshaft assembly 3, improving stamping accuracy and equipment life.

[0037] Please see Figures 2-3In this embodiment, the crankshaft assembly 3 includes a motor 31, which serves as a power source and is mounted on one side of the upper end of the platform 2. Its output end drives the pulley 32 to rotate via a belt drive. The middle of the pulley 32 is connected to a drive shaft 33. One side of the drive shaft 33 is supported by a bracket 34 and fixed to the outside of the platform 2, while the other side meshes with a drive gear 35. The drive gear 35 has biasing shaft plates 36 on both its front and rear sides, and a convex shaft 37 passes between the two biasing shaft plates 36. One side of the convex shaft 37 is connected by a first connecting arm 38. The second connecting arm 39 is connected to the second connecting arm 39, which is linked to the transmission gear 35 through the shaft. The other side of the cam shaft 37 is connected to the crank connecting rod mechanism 310. The bottom of the crank connecting rod mechanism 310 is connected to the slider 311. The slider 311 slides with the table body 2 through the guide rail. The lower end of the slider 311 is equipped with the stamping template 312 to realize the stamping operation. The crank connecting rod mechanism 310 is equipped with a large gear 313 on the rear side. The large gear 313 is symmetrically arranged on the left and right and meshes with each other to ensure synchronous operation on both sides and enhance transmission stability.

[0038] Please see Figure 4 In this embodiment, the trolley assembly 4 includes a trolley body 41, which is installed at the lower end of the platform 2. A reduction motor 42 is installed inside the trolley body 41. The reduction motor 42 is fixed by an adapter plate 43. The output end of the reduction motor 42 transmits power through a universal joint 44. The universal joints 44 are arranged symmetrically on the left and right sides inside the trolley body 41. The outer ends of the universal joints 44 on both sides are connected to the gear shaft 45 respectively. The lower end of the gear shaft 45 meshes with a drive gear 46. The drive gear 46 drives the drive wheel 47 to rotate through the shaft. The drive wheel 47 contacts the upper surface of the track 5 to move along the track. A track cleaning plate 48 is installed on one side of the lower end of the drive wheel 47. It is fixed to the bottom of the trolley body 41 and is used to remove debris from the track surface to ensure smooth movement.

[0039] Please see Figure 5In this embodiment, the anti-eccentricity device 6 includes a connecting drive assembly 61, which is symmetrically arranged on the left and right sides of the crankshaft assembly 3. A first movable plate 62 is installed on the upper end of the connecting drive assembly 61. First connecting rods 63 are rotatably connected to the left and right sides of the upper end of the first movable plate 62, and the first connecting rods 63 on both sides pass through the interior of the left and right sides of the fixed plate 64. The fixed plate 64 is locked to the interior of the platform 2, that is, it is in a static locked state. The upper end of the first connecting rod 63 is rotatably connected to the second connecting rod 65. The middle part of the second connecting rod 65 is rotatably connected to the fixed plate 64. The other end of the second connecting rod 65 is hinged to the third connecting rod 66. The bottom of the third connecting rod 66 is connected to the second movable plate 64. The movable plate 67 is rotatably connected. Thus, when the first movable plate 62 moves downward, the second movable plate 67 will move upward relative to the first movable plate 67 through the linkage of the first connecting rod 63, the second connecting rod 65 and the third connecting rod 66. The four sides of the second movable plate 67 are slidably engaged with the inside of the platform body 2 to ensure the smooth up and down movement of the second movable plate 67 under the transmission. The bottom left and right sides of the first movable plate 62 are equipped with guide and stabilizing components 68, and the lower middle part of the first movable plate 62 is provided with a pressing support component 69. The lower ends of both the guide and stabilizing components 68 and the pressing support component 69 are connected to the inside of the second movable plate 67. In this way, an anti-eccentric load mechanism with buffering and guiding functions is constructed.

[0040] Please see Figure 6 In this embodiment, the connection drive assembly 61 includes a connecting strip 611, which is fixed to the side of the slider 311 by bolts. Its outer surface is attached to the docking plate 612. The upper end of the docking plate 612 is locked to the first moving plate 62 and can move up and down synchronously with the first moving plate 62. Guide frames 613 are provided on both sides of the docking plate 612. Guide rods 614 are vertically installed inside both guide frames 613. Springs 615 are sleeved on the outside of the guide rods 614. A moving block 616 is provided on the upper end of the guide rods 614. The moving block 616 can slide up and down along the guide rods 614. Its bottom is in contact with the springs 615 and its outside is connected to the first moving plate 62.

[0041] The longitudinal width of the connecting strip 611 is greater than the longitudinal width of the bottom of the docking plate 612, and there is a gap between the connecting strip 611 and the bottom of the docking plate 612. That is, when the connecting strip 611 moves down with the slider 311 in advance, it moves to the bottom of the docking plate 612 and comes into contact with it to realize the synchronous downward push of the docking plate 612, so as to meet the subsequent downward transmission activity of the first moving plate 62.

[0042] Please see Figures 7-8 In this embodiment, the guide stabilizing component 68 includes a stabilizing guide rail 681. The stabilizing guide rail 681 is bolted to the lower end of the first moving plate 62, and the bottom of the stabilizing guide rail 681 is inserted into the interior of the second moving plate 67. A guide groove 682 is provided in the middle of one side of the stabilizing guide rail 681. A moving block 683 is slidably connected inside the guide groove 682. The four sides of the moving block 683 are locked to the interior of the platform 2.

[0043] The movable connecting block 683 includes a connecting block body 6831. Connecting blocks 6832 are fixed on all four sides of the connecting block body 6831, and the connecting blocks 6832 are locked to the inside of the platform body 2. A wear-resistant housing 6833 is locked on the side of the connecting block body 6831 near the stable guide rail 681, and the wear-resistant housing 6833 is slidably embedded in the guide groove 682.

[0044] The wear-resistant housing 6833 is composed of a titanium alloy layer, a nickel-based high-temperature alloy layer, and a tungsten carbide-cobalt composite coating from the inside out. It combines high strength, excellent high-temperature resistance, and extremely high wear resistance, making it suitable for long-term high-speed and high-load sliding conditions and significantly extending its service life.

[0045] Please see Figures 9-11 In this embodiment, the clamping support component 69 includes a plug plate 691, which is disposed at the lower middle part of the first moving plate 62. A transmission groove 692 is opened on each side of the plug plate 691. Each transmission groove 692 starts in the shape of an inclined groove, and a clamping structure 693 is connected to the lower end of each transmission groove 692.

[0046] The clamping structure 693 includes a docking shell 6931, which is located below the insertion plate 691. Both sides of the docking shell 6931 are slidably connected to the transmission groove 692 via connecting shafts 6932. The docking shell 6931 is equipped with a clamping spring 6933 and is inserted with an insertion shaft 6934. One side of the insertion shaft 6934 is acted upon by the clamping spring 6933, and the other side is fitted with a pressure plate 6935. The pressure plate 6935 is embedded inside the side of the stable guide rail 681 and placed inside the second moving plate 67.

[0047] The working principle of this embodiment is as follows:

[0048] When the position of the trolley assembly 4 needs to be adjusted, the reduction motor 42 in the trolley assembly 4 is started. The power is transmitted to the gear shaft 45 through the universal joint 44, driving the gear 46 and the drive wheel 47 to rotate. In this way, the trolley assembly 4 will move smoothly along the track 5. The track cleaning plate 48 set under the drive wheel 47 continuously removes debris from the track surface during the movement, ensuring smooth movement and avoiding slippage and deviation from the track.

[0049] During the stamping operation, the motor 31 starts and drives the pulley 32 and the drive shaft 33 to rotate via belt drive, which in turn drives the drive gear 35 to rotate. The cam 37, which is connected to the front and rear sides of the drive gear 35 and is located inside the biased shaft plate 36, will rotate with the drive gear 35. In conjunction with the transmission of the first connecting arm 38 and the second connecting arm 39, the power is transmitted to the crank connecting rod mechanism 310. Finally, the crank connecting rod mechanisms 310 on both sides, in conjunction with the meshing transmission of the large gears 313 on both sides, make the slider 311 move up and down along the guide rail, realizing the stamping activity of "slow down and fast up". That is, the double-point multi-link transmission structure, in conjunction with the synchronous meshing of the large gears 313 on both sides, ensures synchronous drive on both sides and smooth power transmission. At the same time, the crankshaft structure realizes the stamping speed curve of "slow down and fast up", improving the stamping accuracy and workpiece quality.

[0050] When the slider 311 moves downward, the connecting bar 611 on its side moves downward as well. Since the longitudinal width of the connecting bar 611 is greater than the bottom width of the docking plate 612 and there is a gap, after the slider 311 moves downward a certain distance, the bottom of the connecting bar 611 contacts the bottom of the docking plate 612 and pushes the docking plate 612 and the first moving plate 62 to move downward as a whole. When the first moving plate 62 moves downward, the first connecting rods 63 on its left and right sides move downward as well. Since the fixed plate 64 is fixed on the platform 2, the rotation of the first connecting rod 63 drives the second connecting rod 65 to rotate around the fixed plate 64, which in turn drives the third connecting rod 66 to swing upward, so that the second moving plate 67 moves upward relatively. That is, the multi-link mechanism converts the downward motion into a compensating displacement to the side and upward, effectively counteracting the eccentric load torque and greatly reducing the deformation and wear of the crankshaft assembly 3 caused by uneven force.

[0051] During the relative movement of the first moving plate 62 and the second moving plate 67, the stabilizing guide rail 681 in the guide stabilizing assembly 68 moves downward with the first moving plate 62. Its guide groove 682 slides along the wear-resistant shell 6833 of the moving block 683, providing high-precision vertical guidance for the up and down stamping motion, enhancing the rigidity of the system, and ensuring low friction and high wear resistance during long-term operation through the wear-resistant shell 6833 with composite coating, reducing maintenance frequency and cost. At the same time, the plug plate 691 in the clamping support assembly 69 moves downward with the first moving plate 62. Its inclined transmission groove 692 pushes the connecting shaft 6932 to drive the clamping structure 693 to press towards the stabilizing guide rail 681. In this way, the pressure plate 6935 continuously presses the side of the stabilizing guide rail 681 under the action of the clamping spring 6933, ensuring that the slider 311 provides stable clamping when moving downward at low speed and maintains moderate elasticity when moving upward at high speed, thus ensuring guidance accuracy and avoiding rigid impact.

[0052] When the slider 311 completes the stamping and moves upward quickly, the connecting bar 611 disengages from the docking plate 612, and the first moving plate 62 returns to its original position under the elastic reset action of the spring 615 outside the guide rod 614, which drives the guide stabilizing component 68 and the pressing support component 69 to return to their initial state, ready for the next stamping cycle.

[0053] In summary, the crankshaft assembly 3 enables efficient stamping, the trolley assembly 4 enables flexible transfer, and the anti-eccentricity device 6 suppresses eccentricity in real time during the stamping process through the synergistic effect of multi-link transmission, elastic guidance and dynamic clamping, ensuring that the press operates smoothly, with reliable accuracy and long service life under high-speed and heavy-load conditions.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A crankshaft-type double-point multi-link press, comprising a support platform (1), a platform body (2), a crankshaft assembly (3), a trolley assembly (4), and rails (5), wherein the support platform (1) is provided with a platform body (2) at its upper end, the crankshaft assembly (3) is installed inside the upper end of the platform body (2), the trolley assembly (4) is installed inside the lower end of the platform body (2), and rails (5) are connected to both sides of the bottom of the trolley assembly (4), and the rails (5) on both sides are connected to the outer side of the lower end of the platform body (2); Its features are: It also includes anti-eccentricity devices (6) located on both sides of the crankshaft assembly (3). The anti-eccentricity devices (6) include connecting drive assemblies (61). The connecting drive assemblies (61) are installed on the left and right sides of the crankshaft assembly (3). A first movable plate (62) is provided on the upper end of one side of the connecting drive assemblies (61). A first connecting rod (63) is rotatably connected to both sides of the upper end of the first movable plate (62). A fixed plate (64) is provided opposite to the upper end of the first movable plate (62), and the fixed plate (64) is locked to the inside of the platform body (2). A second connecting rod (65) is rotatably connected to the upper end of the first connecting rod (63) on both sides. The second connecting rod (65) is rotatably connected to the fixed plate (64) inside, and the other side of the second connecting rod (65) is rotatably connected to the third connecting rod (66). The bottom of the third connecting rod (66) is rotatably connected to the second moving plate (67), and the four sides of the second moving plate (67) are slidably connected to the inside of the platform (2). The bottom two sides of the first moving plate (62) are equipped with guide stabilizing components (68), and the lower middle part of the first moving plate (62) is provided with a pressing support component (69). The lower ends of the guide stabilizing component (68) and the pressing support component (69) are connected to the inside of the second moving plate (67).

2. The crankshaft-type double-point multi-link press according to claim 1, characterized in that: The connecting drive assembly (61) includes a connecting strip (611), which is bolted to the side of the trolley assembly (4). A docking plate (612) is attached to the outside of the connecting strip (611), and the upper end of the docking plate (612) is locked to the first moving plate (62). Guide frames (613) are provided on both sides of the docking plate (612). A guide rod (614) is provided inside the guide frame (613). A spring (615) is installed on the outside of the guide rod (614). A moving block (616) is provided on the outside of the upper end of the guide rod (614). The moving block (616) is slidably connected to the outside of the guide rod (614), and the bottom of the moving block (616) is connected to the spring (615). The outside of the moving block (616) is connected to the first moving plate (62).

3. The crankshaft-type double-point multi-link press according to claim 1, characterized in that: The guide stabilizing component (68) includes a stabilizing guide rail (681), which is bolted to the lower end of the first moving plate (62), and the bottom of the stabilizing guide rail (681) is inserted into the interior of the second moving plate (67). A guide groove (682) is provided in the middle of one side of the stabilizing guide rail (681), and a moving block (683) is slidably connected inside the guide groove (682). The four sides of the moving block (683) are locked to the interior of the platform body (2).

4. The crankshaft-type double-point multi-link press according to claim 3, characterized in that: The movable connecting block (683) includes a connecting block body (6831), and connecting blocks (6832) are fixed on all four sides of the connecting block body (6831). The connecting blocks (6832) are locked to the inside of the platform body (2). A wear-resistant housing (6833) is locked on the side of the connecting block body (6831) near the stable guide rail (681), and the wear-resistant housing (6833) is slidably embedded in the guide groove (682).

5. The crankshaft-type double-point multi-link press according to claim 1, characterized in that: The clamping support assembly (69) includes a plug plate (691), which is located at the lower middle of the first moving plate (62). The plug plate (691) has transmission grooves (692) on both sides of its exterior, and the lower ends of the transmission grooves (692) on both sides are connected to clamping structures (693).

6. The crankshaft-type double-point multi-link press according to claim 5, characterized in that: The clamping structure (693) includes a docking shell (6931), which is located at the lower end of the plug plate (691). Both ends of one side of the docking shell (6931) are connected to a connecting shaft (6932), and both sides of the connecting shaft (6932) are slidably connected to the inside of the transmission groove (692). A clamping spring (6933) is installed inside the docking shell (6931), and a plug shaft (6934) is inserted inside the docking shell (6931). One side of the plug shaft (6934) is connected to the clamping spring (6933), and a pressure plate (6935) is installed on the other side of the plug shaft (6934). The pressure plate (6935) is embedded inside the side of the stable guide rail (681), and the pressure plate (6935) is located inside the second moving plate (67).

7. The crankshaft-type double-point multi-link press according to claim 1, characterized in that: The crankshaft assembly (3) includes a motor (31), which is mounted on one side of the upper end of the platform (2). The output end of the motor (31) is connected to a pulley (32) via a belt. A drive shaft (33) is connected to the middle of the pulley (32). A bracket (34) is mounted on one side of the drive shaft (33), and the bracket (34) is connected to the outside of the platform (2). The other side of the drive shaft (33) is meshed with a drive gear (35). The drive gear (35) has bias plates (36) on both the front and rear sides, and a convex shaft (37) passes between the bias plates (36) on both sides. The convex shaft (37) has an outer side on one side. The first connecting arm (38) is connected to the first connecting arm (38), and the outer end of the first connecting arm (38) is connected to the second connecting arm (39). The second connecting arm (39) is connected to the transmission gear (35) through the shaft. The other side of the convex shaft (37) is connected to the crank connecting rod mechanism (310). The bottom of the crank connecting rod mechanism (310) is connected to the slider (311). The slider (311) is slidably connected to the platform (2) through the guide rail. The bottom of the slider (311) is provided with a stamping template (312). The rear side of the crank connecting rod mechanism (310) is equipped with a large gear (313), and the large gear (313) is symmetrically arranged and meshed.

8. The crankshaft-type double-point multi-link press according to claim 1, characterized in that: The trolley assembly (4) includes a trolley body (41), which is located at the lower end of the platform (2). A geared motor (42) is installed inside the trolley body (41). The geared motor (42) is installed on one side of the adapter plate (43), and the output end of the geared motor (42) is connected to a universal joint (44). The universal joint (44) is symmetrically arranged on the left and right sides inside the trolley body (41), and both sides of the trolley body (41) are connected to a gear shaft (45). A drive gear (46) is meshed at the lower end of the gear shaft (45). A drive wheel (47) is connected to the middle side of the drive gear (46) through a shaft. The drive wheel (47) is connected to the upper end of the track (5). A track cleaning plate (48) is provided on the lower side of the drive wheel (47), and the track cleaning plate (48) is locked to the bottom of the trolley body (41).

9. A crankshaft-type double-point multi-link press according to claim 2, characterized in that: The longitudinal width of the connecting strip (611) is greater than the longitudinal width of the bottom of the mating plate (612), and there is a gap between the connecting strip (611) and the bottom of the mating plate (612).

10. A crankshaft-type double-point multi-link press according to claim 4, characterized in that: The wear-resistant shell (6833) is composed of a titanium alloy layer, a nickel-based high-temperature alloy layer, and a tungsten carbide-cobalt composite coating from the inside out.

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