Eccentric gear multi-link punch

Abstract

The eccentric gear multi-connecting rod puncher disclosed by the application comprises a base body, a stamping body, a sliding block body, a step ladder, an operation panel and a trolley mechanism; the trolley mechanism is optimally arranged, has two first supporting structures and second supporting structures for placing and mounting workpieces, and is driven to simultaneously shift by a pushing structure; when one of the supporting structures is located at the middle part below the stamping body, the other supporting structure is located at the position of the side part above the cross frame and close to the edge; during the stamping process of the workpiece, another workpiece to be processed can be mounted above the supporting structure close to the edge, so that another workpiece to be processed can be immediately moved into the interior for processing after the stamping process of the workpiece is completed, the continuity and processing efficiency of the stamping process of the workpiece are improved, and the loading assemblies on the two supporting structures can be shifted along a rectangular trajectory to stamp and process different positions of the workpiece, thereby improving the processing adaptability and effect of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of punch press technology, specifically to an eccentric gear multi-link punch press. Background Technology

[0002] A punch press is a stamping press. The design principle of a punch press is to convert circular motion into linear motion. The main motor drives the flywheel, which in turn drives the gears, crankshaft or eccentric gear, connecting rod, etc. through the clutch to achieve the linear motion of the slide. The motion from the main motor to the connecting rod is circular motion. It is widely used in various processing fields.

[0003] Currently, Chinese patent application number CN:202020884667.3 discloses a single-point punch press with an eccentric gear mechanism. Its structure is as follows: the main motor drives and connects to the pulley, the pulley is connected to the flywheel via a belt, a first gear is coaxially arranged on one side of the flywheel, and a clutch and brake are coaxially arranged on the other side. The first and second gears are meshed and connected, the third and second gears are coaxially arranged, and the eccentric gear is meshed and connected to the third gear. The eccentric convex circle of the eccentric gear is sleeved with a bushing through a bearing. The middle of the bushing is connected to the top of the connecting rod, and the bottom of the connecting rod is connected to the slider through a ball joint. The two sides of the slider are slidably connected to the vertically arranged slide rails. The first, second, and third gears and the eccentric gear are all spur gears.

[0004] However, existing punch presses typically require removing the workpiece from the mold after stamping and then reloading a new workpiece for stamping. This results in poor continuity of stamping, affecting processing efficiency. Furthermore, the workpiece is in a relatively fixed position during processing, making it inconvenient to process different parts of the workpiece, leading to poor adaptability and effectiveness in workpiece processing. Summary of the Invention

[0005] The purpose of this invention is to provide an eccentric gear multi-link punch press to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an eccentric gear multi-link punch press, comprising a base body, a stamping body, a slide body, a step ladder, an operation panel, and a trolley mechanism. The stamping body is fastened to the top left and right sides of the base body. The slide body is arranged below the stamping body, and a cutting tool for stamping workpieces is arranged on the bottom side of the slide body. The step ladder is arranged on the right side of the stamping body. The operation panel is rotatably arranged on the front left side of the stamping body. A trolley mechanism for loading workpieces is installed on the top middle side of the base body. The trolley mechanism includes a housing fastened to the top middle side of the base body, a crossbeam fastened to the top of the housing and extending outward, two slide rails arranged on the front and rear sides of the top of the crossbeam, a pushing structure installed on the front middle side of the housing, and a first support structure and a second support structure fastened to the rear left and right sides of the pushing structure, respectively. The bottom of the first support structure and the second support structure are slidably connected to the crossbeam, and the pushing structure is used to drive the first support structure and the second support structure to move synchronously.

[0007] Preferably, the base body has a groove for discharging waste material on the inner side, and the stamping body has an eccentric gear multi-link structure for low-speed stamping of the workpiece and a fast return function, and the lower part of the eccentric gear multi-link structure is connected to the slider body.

[0008] Preferably, the first support structure and the second support structure have the same structure and size, and when one support structure is located in the lower middle part of the stamping body, the other support structure is located on the upper side of the crossbeam near the edge.

[0009] Preferably, the pushing structure includes a drive assembly whose bottom is fastened to the chamber seat. A chain is engaged with the top rear side of the drive assembly. A first joint screw and a second joint screw are respectively provided on the left and right sides of the chain. A first internal threaded sleeve is threaded to the outer side of the first joint screw, and a second internal threaded sleeve is threaded to the outer side of the second joint screw. The first internal threaded sleeve and the second internal threaded sleeve are rotatably connected to the left and right sides of the positioning frame, respectively. The left and right rear sides of the positioning frame are fastened to a first support structure and a second support structure, respectively.

[0010] Preferably, the drive assembly includes a frame cover whose bottom is fastened to the housing, a first motor fastened to the bottom side inside the frame cover, a worm gear connected to the output end of the first motor, two bearing blocks respectively wrapped around the left and right sides of the worm gear, a worm wheel meshing with the top side of the worm gear, and a gear coaxially rotating in the middle of the worm wheel. The bottom of the two bearing blocks is fixed to the frame cover, the gear is located on the rear side of the frame cover, and the top of the gear meshes with the chain for transmission.

[0011] Preferably, a shaft is provided in the middle of the gear, the other end of which is connected to a worm gear, and a circular opening is provided on the left side of the rear part of the frame, through which the shaft rotates.

[0012] Preferably, the first support structure includes a support connected to the front side of the sliding structure, an inspection door fastened to the middle side of the front of the support by bolts, a loading assembly disposed in the upper middle side inside the support, rollers rotatably connected to the bottom side inside the support, and two positioning members respectively connected to the middle of the left and right sides of the support. The rollers are provided in four parts and are respectively located on the four sides inside the support, and the four rollers are slidably connected to two slide rails in pairs.

[0013] Preferably, the positioning element includes a cylinder and a pressure block connected to the bottom output end of the cylinder, wherein when the cylinder is started to the maximum stroke, the bottom of the pressure block abuts against the crossbeam.

[0014] Preferably, the loading assembly includes a stand with its bottom fixed to a support, a second motor mounted on the right side of the stand, a pulley connected to the top output end of the second motor, a transmission belt connected to the right side of the outer surface of the pulley, a turntable connected to the other side of the transmission belt, a guide plate located at the center of the top side of the turntable, a sliding block that slides around the right side of the center of the turntable, a shifting frame rotatably connected to the bottom of the sliding block, a bearing plate fixed to the top of the shifting frame, a sliding plate that slides laterally on the center of the bottom of the bearing plate, and a mold support plate fixed to the top of the bearing plate for loading workpieces. The four ends of the bottom of the guide plate are fixed to the stand, and the center of the bottom of the sliding plate is slidably connected to the guide plate in a front-back direction. A groove is provided on the center of the bottom of the guide plate, and the top of the sliding block is inserted into and slides within the groove.

[0015] Preferably, the slot frame is composed of two rectangular frames with rounded corners on all four sides, forming a U-shaped structure. The sliding block has a rectangular hollowed-out slot inside, and protruding posts are provided on both the upper and lower sides of the sliding block. The protruding post on the upper side is inserted and slides between the two rectangular frames of the sliding block, and the protruding post on the lower side is inserted and rotates at the bottom center of the shift frame.

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

[0017] This invention optimizes the trolley mechanism, which has two support structures for placing and mounting workpieces: a first support structure and a second support structure. The first and second support structures are simultaneously moved by the engagement of gears and chains in the pushing structure. When one support structure is located below the center of the stamping body, the other support structure is located on the upper side of the crossbeam near the edge. During the stamping process, another workpiece can be mounted on the support structure near the edge, allowing it to be moved inside immediately after stamping, improving the continuity and efficiency of the stamping process. Furthermore, the loading components on the two support structures can move along a rectangular trajectory to stamp different positions on the workpiece, improving the adaptability and effectiveness of the workpiece processing.

[0018] The present invention has four rollers, which are located on the four sides inside the support. The four rollers are slidably connected to two slide rails in pairs, so that the rollers can move on the slide rails and ensure the stability of the support displacement. The positioning component includes a cylinder and a pressure block connected to the bottom output end of the cylinder. When the cylinder starts to the maximum stroke, the bottom of the pressure block abuts against the crossbeam. The support is positioned by the abutting contact between the pressure block and the crossbeam, preventing the support from shifting laterally during the stamping process.

[0019] The groove frame of this invention consists of two rectangular frames with rounded corners, forming a U-shaped structure. The sliding block has a rectangular hollow groove inside, and protruding posts are provided on both the upper and lower sides of the sliding block. The protruding post on the upper side is inserted and slides between the two rectangular frames of the sliding block, and the protruding post on the lower side is inserted and rotates at the bottom center of the shift frame. By rotating the bottom of the sliding block and the shift frame, the position of the shift frame can be adjusted and changed. After the sliding block slides between the two rectangular frames of the sliding block, the shift frame can move in a rectangular trajectory in the front, back, left and right directions, thereby causing the workpiece to move in a rectangular trajectory to change its position. This allows the workpiece to be aligned with the stamping tool for stamping processing at different positions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 The right view;

[0022] Figure 3 This is a schematic diagram of the trolley mechanism of the present invention;

[0023] Figure 4 This is a schematic diagram of the pushing structure of the present invention;

[0024] Figure 5This is a rear view schematic diagram of the driving component of the present invention;

[0025] Figure 6 This is a schematic diagram of the first support structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the loading component of the present invention;

[0027] Figure 8 This is a bottom view of the connection between the turntable and the sliding block of the present invention.

[0028] In the diagram: Base body-1, Stamping body-2, Slider body-3, Step ladder-4, Operation panel-5, Trolley mechanism-6, Storage seat-61, Horizontal frame-62, Slide rail-63, Pushing structure-64, First support structure-65, Second support structure-66, Drive assembly-641, Chain-642, First connector screw-rod-643, First internal threaded sleeve-644, Positioning frame-645, Second connector screw-rod-646, Second internal threaded sleeve-647, Frame cover-6411, First motor-6412, Worm gear Rod-6413, bearing block-6414, worm gear-6415, gear-6416, support-651, inspection door-652, loading assembly-653, roller-654, positioning component-655, upright frame-6531, second motor-6532, pulley-6533, transmission belt-6534, turntable-6535, guide plate-6536, sliding sleeve block-6537, shifting frame-6538, bearing plate-6539, sliding plate-65310, mold support plate-65311, groove frame-65361. Detailed Implementation

[0029] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0030] Please see Figure 1 and Figure 2This invention provides an eccentric gear multi-link punch press, including a base body 1, a stamping body 2, a slide body 3, a step ladder 4, an operation panel 5, and a trolley mechanism 6. The stamping body 2 is tightly attached to the top left and right sides of the base body 1. The slide body 3 is located below the stamping body 2, and a cutting tool for stamping the workpiece is located on the bottom side of the slide body 3. The workpiece is stamped by the longitudinal movement of the cutting tool driven by the slide body 3 through the stamping body 2. The step ladder 4 is located on the right side of the stamping body 2, and the operation panel 5 is rotatably mounted on the front left side of the stamping body 2. The trolley mechanism 6 for loading the workpiece is installed on the top center side of the base body 1. The trolley mechanism 6 has two... The positions of the two workpieces can be shifted, so that when one workpiece is being processed on the bottom side of the tool, the other side can be moved outward to accommodate a new workpiece, enabling continuous processing of the workpiece and improving the processing efficiency of the punch press. The position of the workpiece can be shifted in a rectangular trajectory, improving the processing effect of the workpiece. The base body 1 has a groove for discharging waste material in the middle. The stamping body 2 has an eccentric gear multi-link structure for low-speed stamping of the workpiece and a fast return function. The eccentric gear multi-link structure is connected to the slide body 3 below to facilitate stamping of the workpiece.

[0031] Please see Figure 1 , Figure 2 and Figure 3 This invention provides an eccentric gear multi-link punch press. The trolley mechanism 6 includes a housing 61 fastened to the top center of the base body 1, a crossbeam 62 fastened to the top of the housing 61 and extending outward, two slide rails 63 disposed on the front and rear sides of the top of the crossbeam 62, a pushing structure 64 installed on the front center of the housing 61, and a first support structure 65 and a second support structure 66 respectively fastened to the left and right rear sides of the pushing structure 64. The bottoms of the first support structure 65 and the second support structure 66 are slidably connected to the crossbeam 62, and the pushing structure 64 is used to drive the first support structure 65 and the second support structure 66 together. The first support structure 65 and the second support structure 66 are identical in structure and size. When one support structure is located in the middle of the lower part of the stamping body 2, the other support structure is located on the upper side of the crossbeam 62 near the edge. The workpiece is placed and installed through the first support structure 65 and the second support structure 66. During the stamping process of the workpiece, the positions of the first support structure 65 and the second support structure 66 can be shifted, so that when the workpiece on one side is moved into the bottom side of the tool for processing, the other side is moved out to the outside, so as to install and place a new workpiece, realize the continuous processing of the workpiece, and improve the processing efficiency of the workpiece.

[0032] Please see Figure 3 , Figure 4 and Figure 5This invention provides an eccentric gear multi-link punch press. The pushing structure 64 includes a drive assembly 641 whose bottom is fastened to a housing 61. A chain 642 is engaged with the top rear of the drive assembly 641. A first connector screw 643 and a second connector screw 646 are respectively provided on the left and right sides of the chain 642. A first internal threaded sleeve 644 is threaded to the outer side of the first connector screw 643, and a second internal threaded sleeve 647 is threaded to the outer side of the second connector screw 646. The first internal threaded sleeve 644 and the second internal threaded sleeve 647 rotate respectively. The chain is flexibly connected to the left and right sides of the positioning frame 645. The chain is straightened within the positioning frame 645 by the cooperation of two joint screws and two internal threaded sleeves. Then, the chain 642 drives the positioning frame 645 to move laterally through the action of the drive assembly 641. The left and right sides of the rear of the positioning frame 645 are fastened to the first support structure 65 and the second support structure 66 respectively, so that the first support structure 65 and the second support structure 66 can move laterally at the same time under the action of the positioning frame 645, thereby driving the two support structures to realize the continuous processing of the workpiece.

[0033] The drive assembly 641 includes a frame cover 6411 whose bottom is fastened to the housing 61, a first motor 6412 fastened to the bottom side inside the frame cover 6411, a worm gear 6413 connected to the output end of the first motor 6412, two bearing blocks 6414 respectively covering the left and right sides of the worm gear 6413, a worm wheel 6415 meshing with the top side of the worm gear 6413, and a gear 6416 coaxially rotating in the middle of the worm wheel 6415. Under the action of the first motor 6412, the worm gear 6413 drives the gear 6416 to rotate through its engagement with the worm wheel 6415. The bottom of the two bearing blocks 6414... All are fixed to the frame cover 6411. The gear 6416 is located on the rear side of the frame cover 6411, and the top of the gear 6416 meshes with the chain 642 for transmission, so that when the gear 6416 rotates, it drives the chain 642 to perform meshing and displacement. A shaft is provided in the middle of the gear 6416, and the other end of the shaft is connected to the worm gear 6415. A circular opening is provided on the left side of the rear part of the frame cover 6411, and the shaft passes through and rotates inside the circular opening to ensure the stability of the rotation of the gear 6416. The cooperation between the worm gear 6415 and the worm wheel 6415 prevents the gear from rotating under the action of external force, thereby improving the positional stability of the positioning frame 645.

[0034] Please see Figure 3 , Figure 6 , Figure 7 and Figure 8This invention provides an eccentric gear multi-link punch press. The first support structure 65 includes a support 651 connected to a pushing structure 64 at its front, an inspection door 652 bolted to the middle of the front part of the support 651, a loading assembly 653 disposed inside the upper middle part of the support 651, a roller 654 rotatably connected to the bottom inside the support 651, and two positioning members 655 respectively connected to the middle of the left and right sides of the support 651. These positioning members 655 further increase the stability of the support 651's position after the support 651's position changes. Four rollers 654 are provided and are located on the four sides inside the support 651. The four rollers 654 are slidably connected to two slide rails 63 in pairs, so that the rollers 654 can move on the slide rails 63 to ensure the stability of the support 651. The positioning component 655 includes a cylinder and a pressure block connected to the bottom output end of the cylinder. When the cylinder starts to the maximum stroke, the bottom of the pressure block abuts against the cross frame 62. The support 651 is positioned by the contact between the pressure block and the cross frame 62 to prevent the support 651 from shifting laterally during the stamping process.

[0035] The loading assembly 653 includes a stand 6531 whose bottom is fastened to a support 651, a second motor 6532 mounted on the right side of the stand 6531, a pulley 6533 connected to the top output end of the second motor 6532, a drive belt 6534 connected to the right side of the outer surface of the pulley 6533, and a turntable 6535 connected to the other side inside the drive belt 6534. The second motor 6532 serves as the power source, and the load is transmitted through the pulley 6533 and the drive belt 6534. The combination of these components causes the turntable 6535 to rotate. A guide plate 6536 is located at the center of the top side of the turntable 6535; a sliding block 6537 slides along the right side of the center of the turntable 6535; a shifting frame 6538 is rotatably connected to the bottom of the sliding block 6537; a bearing plate 6539 is fastened to the top of the shifting frame 6538; a sliding plate 65310 slides laterally along the bottom center of the bearing plate 6539; and a mold support plate 6 is fastened to the top side of the bearing plate 6539 for loading workpieces. 5311, the four ends of the bottom of the guide plate 6536 are fastened to the upright 6531, serving as a support and positioning element. The bottom middle side of the slide plate 65310 is slidably connected to the guide plate 6536 in a front-to-back direction. A groove frame 65361 is provided on the bottom middle side of the guide plate 6536, and the top of the sliding block 6537 is inserted and slidably inserted into the groove frame 65361, so that under the rotation of the turntable 6535, the sliding block 6537 moves within the groove frame 65361 on the bottom side of the guide plate 6536. The shifting position allows the shifting frame 6538 to move the bearing plate 6539 in the left and right directions above the slide plate 65310. Under the front and rear direction limiting action of the bearing plate 6539 and the slide plate 65310, the slide plate 65310 can be moved in the front and rear directions on the guide plate 6536. This allows the mold support plate 65311 to change its position in four directions (front, back, left, and right) to perform stamping processing on different positions on the workpiece, thereby improving the processing effect on the workpiece.

[0036] The groove frame 65361 consists of two rectangular frames with rounded corners, forming a U-shaped structure. The sliding block 6537 has a rectangular hollowed-out groove inside, and protruding posts are provided on both the upper and lower sides of the sliding block 6537. The protruding post on the upper side slides between the two rectangular frames of the sliding block 6537, and the protruding post on the lower side rotates at the bottom center of the shift frame 6538. When the turntable 6535 rotates, it drives the sliding block 6537 to change position on the bottom side of the turntable 6535. Through the rotational cooperation between the bottom of the sliding block 6537 and the shift frame 6538, the position of the shift frame 6538 is adjusted and changed. After the sliding block 6537 slides between the two rectangular frames, the shift frame 6538 can move in a rectangular trajectory in all directions, so that the position of the workpiece moves in a rectangular trajectory to change its position. This allows the different positions of the workpiece to be aligned with the stamping tool for stamping, improving the processing effect of the workpiece.

[0037] The working principle of the eccentric gear multi-link punch press of the present invention is as follows:

[0038] First, the design is installed on the base body 1 at the position where the workpiece needs to be stamped, so that the design can be used;

[0039] Secondly, when the second support structure 66 is located below the stamping body 2 and the slider body 3, the workpiece to be processed is installed on the mold support plate 65311 of the first support structure 65 located on the outer side through the mold. After the workpiece is installed, the first motor 6412 is started. Under the action of the first motor 6412, the worm 6413 drives the gear 6416 to rotate through the cooperation with the worm wheel 6415. The top of the gear 6416 meshes with the chain 642 to drive the chain 642 to perform meshing and displacement when the gear 6416 rotates, so that the chain 642 drives the positioning frame 645 to move laterally. Thus, the positioning frame 645 drives the rollers 654 of the first support structure 65 and the second support structure 66 to move on the slide rail 63, moving the first support structure 65 to below the stamping body 2 and the slider body 3, and moving the second support structure 66 out of the outside. Then, when the cylinder is started to the maximum stroke, the pressure block and the cross frame 62 abut against each other to prevent the position of the support 651 from shifting laterally during the stamping process.

[0040] Third, after the first support structure 65 moves below the stamping body 2 and the slider body 3, the stamping body 2 is started, causing the slider body 3 to move the tool downwards to perform stamping processing on the workpiece. During processing, the second motor 6532 can be started, and the turntable 6535 rotates through the cooperation of the pulley 6533 and the transmission belt 6534. Under the rotation of the turntable 6535, the sliding block 6537 moves within the groove frame 65361 on the bottom side of the guide plate 6536, thereby causing the shifting frame 6538 to move the bearing plate 6539 in the left and right direction above the slide plate 65310. Furthermore, under the front and rear direction limiting action of the bearing plate 6539 and the slide plate 65310, the slide plate 65310 can be moved in the guide plate. The position plate 6536 is moved back and forth, causing the workpiece on the mold support plate 65311 to move in a rectangular trajectory to change its position. After changing the position, stamping can be performed on different positions of the workpiece, improving the processing effect. At the same time, during the stamping process of the workpiece on the first support structure 65, another workpiece to be processed can be installed on the mold support plate 65311 of the second support structure 66. After the workpiece on the first support structure 65 is processed, the first support structure 65 and the second support structure 66 are driven to move simultaneously, moving the second support structure 66 to below the stamping body 2 and the slider body 3, and moving the first support structure 65 to the outside, so as to carry out the stamping process of the next workpiece.

[0041] 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. An eccentric gear multi-link punch press, comprising a base body (1), a stamping body (2) tightly fitted on the left and right sides of the top of the base body (1), a slider body (3) disposed below the stamping body (2), and a cutting tool for stamping workpiece disposed on the bottom side of the slider body (3), a step ladder (4) disposed on the right side of the stamping body (2), and an operation panel (5) rotatably disposed on the left side of the front part of the stamping body (2), characterized in that: It also includes a trolley mechanism (6) installed on the top middle side of the base body (1) for loading workpieces. The trolley mechanism (6) includes a bin seat (61) fastened to the top middle side of the base body (1), a cross frame (62) fastened to the top of the bin seat (61) and extending outward, two slide rails (63) set on the front and rear sides of the top of the cross frame (62), a push structure (64) installed on the front middle side of the bin seat (61), and a first support structure (65) and a second support structure (66) fastened to the left and right sides of the rear of the push structure (64) respectively. The bottom of the first support structure (65) and the second support structure (66) are slidably connected to the cross frame (62), and the push structure (64) is used to drive the first support structure (65) and the second support structure (66) to move synchronously. The first support structure (65) includes a support (651) connected to the front side of the pushing structure (64), an inspection door (652) fastened to the middle side of the front part of the support (651) by bolts, a loading assembly (653) disposed in the upper middle side inside the support (651), a roller (654) rotatably connected to the bottom side inside the support (651), and two positioning parts (655) respectively connected to the middle of the left and right sides of the support (651). The roller (654) is provided in four and is located on the four sides inside the support (651), and the four rollers (654) are slidably connected to two slide rails (63) in pairs. The loading assembly (653) includes a stand (6531) whose bottom is fastened to a support (651), a second motor (6532) mounted on the right side of the stand (6531), a pulley (6533) connected to the top output end of the second motor (6532), a transmission belt (6534) connected to the right side of the outer surface of the pulley (6533), a turntable (6535) connected to the other side of the inside of the transmission belt (6534), a guide plate (6536) located in the middle of the top side of the turntable (6535), a sliding block (6537) that slides on the right side of the middle of the turntable (6535), and a moving part rotatably connected to the bottom of the sliding block (6537). The frame (6538), the support plate (6539) fastened to the top of the shift frame (6538), the slide plate (65310) sliding laterally on the bottom middle side of the support plate (6539), and the mold support plate (65311) fastened to the top side of the support plate (6539) for loading the workpiece, the bottom four ends of the guide plate (6536) are fastened to the upright frame (6531), and the bottom middle side of the slide plate (65310) is slidably connected to the guide plate (6536) in the front and back direction. The bottom middle side of the guide plate (6536) is provided with a groove frame (65361), and the top of the sliding block (6537) is inserted and slidably inside the groove frame (65361).

2. The eccentric gear multi-link punch press of claim 1 wherein: The through slot is arranged in the middle of the inside of the base body (1) for discharging waste, the eccentric gear multi-link structure is arranged in the inside of the punch body (2) for low-speed punching of the workpiece and has the function of fast return, and the eccentric gear multi-link structure is connected with the slide block body (3) below.

3. The eccentric gear multi-link punch press of claim 1 wherein: The first supporting structure (65) and the second supporting structure (66) are the same in structure and size, one of the supporting structures is arranged at the middle below the punch body (2), and the other supporting structure is arranged at the position close to the edge of the top of the cross beam (62).

4. The eccentric gear multi-link punch press of claim 1 wherein: The drive assembly (641) is fastened to the warehouse base (61) at the bottom, the chain (642) is engaged in transmission at the top of the drive assembly (641), the first joint screw piece (643) and the second joint screw piece (646) are arranged on the left and right sides of the chain (642) respectively, the first inner threaded sleeve (644) is threadedly connected to the outer side of the first joint screw piece (643), the second inner threaded sleeve (647) is threadedly connected to the outer side of the second joint screw piece (646), the first inner threaded sleeve (644) and the second inner threaded sleeve (647) are rotatably connected to the left and right sides of the positioning frame (645) respectively, and the left and right sides of the rear part of the positioning frame (645) are fastened to the first supporting structure (65) and the second supporting structure (66) respectively.

5. The eccentric gear multi-link punch press of claim 4 wherein: The drive assembly (641) comprises a frame cover (6411) fastened to the warehouse base (61) at the bottom, a first motor (6412) fastened to the inside bottom of the frame cover (6411), a worm (6413) connected to the output end of the first motor (6412), two bearing blocks (6414) respectively arranged on the left and right sides of the worm (6413), a worm wheel (6415) engaged in transmission on the top of the worm (6413), and a gear (6416) coaxially rotating in the middle of the worm wheel (6415), the bottoms of the two bearing blocks (6414) are fixed to the frame cover (6411), the gear (6416) is arranged on the rear side of the frame cover (6411), and the top of the gear (6416) is engaged in transmission with the chain (642).

6. The eccentric gear multi-link punch press of claim 5 wherein: An axle is arranged in the middle of the gear (6416), the other end of the axle is connected with the worm wheel (6415), a round hole is arranged on the left rear side of the frame cover (6411), and the axle penetrates and rotates in the inside of the round hole.

7. The eccentric gear multi-link punch press of claim 1 wherein: The positioning piece (655) comprises a cylinder and a pressing block connected to the output end of the bottom of the cylinder, when the cylinder is started to the maximum stroke, the bottom of the pressing block abuts against the cross beam (62).

8. The eccentric gear multi-link punch press of claim 1 wherein: The groove frame (65361) is composed of two rectangular frames with rounded corners at four corners, forming a character-shaped structure, a hollow groove in the shape of a rectangle is arranged in the inside of the slide block (6537), and the convex columns are arranged on the upper and lower sides of the slide block (6537), the convex column on the upper side is inserted and slides between the two rectangular frames of the slide block (6537), and the convex column on the lower side is inserted and rotates at the middle of the bottom of the displacement frame (6538).

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