Discharging and carrying assembly

Through the 2-point clamping and elastic extrusion positioning, the problem of position offset and damage during the photovoltaic module is solved, and the stable handling and positioning of the workpiece is achieved.

CN120288498APending Publication Date: 2025-07-11SUZHOU TERUITE ROBOT CO LTD
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Patent Information

Application Number
CN202410028110.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-01-09
Publication Date
2025-07-11

AI Technical Summary

Technical Problem

During the discharge process of photovoltaic modules, the frame position is easily offset or shaken, resulting in unstable handling of the workpiece and damage caused by hard contact clamping.

Method used

The 2-point clamping method is adopted, and the cylinder-driven extrusion block is cooperated with the elastic member to achieve calibration and elastic extrusion positioning of the strip workpiece to avoid hard contact damage.

Benefits of technology

Ensure the stability of the workpiece during handling, avoid position deviation and damage, and improve the stability and reliability of clamping positioning.

✦ Generated by Eureka AI based on patent content.

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Abstract

The blanking carrying assembly comprises a movable plate capable of moving in the vertical direction and two supporting vertical plates installed on the surface of one side of the movable plate, at least one material receiving block is arranged on the upper surface of each supporting vertical plate, a sliding plate is installed on the side surface of each supporting vertical plate in a sliding mode, and the two supporting vertical plates are connected with the sliding plate in a sliding mode. At least one extrusion block corresponding to the vertical portion of the material receiving block is installed on the upper portion of the sliding plate, a groove is formed in the end face of the end, facing the vertical portion of the material receiving block, of the extrusion block, and one end of an elastic piece is embedded into the groove and makes contact with the bottom face of the groove. A workpiece can be conveniently placed in the clamping area, the position of the strip-shaped workpiece can be calibrated through two-point clamping, the workpiece can be carried and discharged in the clamping state so as to guarantee the stability of the workpiece in the whole process, elastic extrusion positioning of the workpiece can be achieved through stretching and retracting of a push block and an elastic piece, and the workpiece can be conveniently clamped and discharged. And damage or position deviation of the workpiece caused by hard contact is avoided.
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Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic processing, and particularly to a blanking and handling component in a photovoltaic dispensing production line. Background Art

[0002] After the frame of a photovoltaic module is dispensed by a dispenser, it needs to be blanked and removed from the processing platform, so as to facilitate the subsequent processes of the dispensed frame and the dispenser to dispense the next frame.

[0003] Currently, when blanking the frame, the frame is not clamped and positioned. Usually, the position of the frame will shift during material taking and shake during the handling process, resulting in unstable workpiece handling. And using hard contact for clamping and positioning will cause damage or position deviation to the frame. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a blanking and handling component, which is convenient for placing the workpiece in the clamping area, can calibrate the position of the strip-shaped workpiece through two-point clamping, can handle and blank the workpiece in the clamped state to ensure the stability of the workpiece throughout the process, and can also realize the elastic extrusion positioning of the workpiece through the telescoping of the push block and the elastic member, avoiding damage or position deviation of the workpiece caused by hard contact.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is: a blanking and handling component, comprising: a movable plate movable in the vertical direction and two support vertical plates installed on one side surface of the movable plate. One ends of the two support vertical plates arranged in parallel and at intervals are connected to the movable plate, and the other ends are vertically away from the movable plate. At least one material receiving block is arranged on the upper surface of each of the support vertical plates. The horizontal part of the L-shaped material receiving block is connected to the support vertical plate. A sliding plate is slidably installed on the side surface of the support vertical plate. At least one extrusion block corresponding to the vertical part of the material receiving block is installed on the upper part of the sliding plate. A clamping area for the strip-shaped workpiece to be inserted is formed between the extrusion block and the vertical part of the material receiving block and above the horizontal part of the material receiving block. A cylinder is installed on the support vertical plate and below the sliding plate, and the piston rod of the cylinder is connected to the sliding plate; A groove is formed on the end surface of the end of the extrusion block facing the vertical part of the material receiving block. One end of an elastic member is embedded in the groove and contacts the bottom surface of the groove. The other end of the elastic member is connected to a push block arranged outside the extrusion block. When the piston rod of the cylinder is in the first state, the vertical part of the material receiving block and the push block on the corresponding extrusion block both squeeze and contact the strip-shaped workpiece located in the clamping area. When the piston rod of the cylinder is in the second state, the elastic member is in a natural relaxation state and there are intervals between the push block on the extrusion block, the extrusion block, and the strip-shaped workpiece in the clamping area.

[0006] The further improved solutions in the above technical solutions are as follows: 1. In the above solution, an installation hole communicating with the groove is formed on the end surface of the other end of the extrusion block. One end of a movable rod sequentially passes through the installation hole and the groove and is connected to the push block. The other end of the movable rod in sliding contact with the inner wall of the installation hole is connected to a retaining ring arranged outside the extrusion block. The length of the movable rod between the push block and the bottom surface of the groove is less than the length of the elastic member in the natural relaxation state, so that the elastic member sleeved outside the movable rod is always in a compressed state.

[0007] 2. In the above solution, when the retaining ring is in pressing contact with the end surface of one end of the extrusion block, a second gap is formed between the surface of the push block facing the extrusion block and the extrusion block, and this second gap is smaller than the first gap formed between the push block and the extrusion block when the elastic member is in the natural relaxation state.

[0008] 3. In the above solution, one side of the main body part of the extrusion block has an external connection part, and this external connection part is connected to the sliding plate.

[0009] 4. In the above solution, the other side surface of the movable plate is connected to the movable part of a vertical transmission mechanism.

[0010] 5. In the above solution, the vertical transmission mechanism is a screw transmission mechanism or a belt transmission mechanism.

[0011] 6. In the above solution, the screw transmission mechanism further includes: a housing extending vertically, a screw rotatably installed on the housing, and a motor installed on the housing and connected to one end of the screw. A movable block is sleeved on the vertically extending screw and is threadedly connected to the screw. The movable plate is installed on this movable block.

[0012] 7. In the above solution, the motor is installed at the lower end of the housing.

[0013] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: 1. The blanking and handling component of the present invention has at least one receiving block provided on the upper surface of its supporting vertical plate. The horizontal part of the L-shaped receiving block is connected to the supporting vertical plate. A sliding plate is slidably mounted on the side surface of the supporting vertical plate. At least one pressing block corresponding to the vertical part of the receiving block is mounted on the upper part of the sliding plate. A clamping area for the bar-shaped workpiece to be inserted is formed between the pressing block and the vertical part of the receiving block and above the horizontal part of the receiving block. A cylinder is mounted on the supporting vertical plate and below the sliding plate. The piston rod of the cylinder is connected to the sliding plate. A groove is formed on the end surface of the pressing block facing the vertical part of the receiving block. One end of an elastic member is embedded in the groove and contacts the bottom surface of the groove. The other end of the elastic member is connected to a push block provided outside the pressing block. When the piston rod of the cylinder is in the first state, the vertical part of the receiving block and the push block on the corresponding pressing block both press and contact the bar-shaped workpiece located in the clamping area. When the piston rod of the cylinder is in the second state, the elastic member is in a natural relaxed state, and there are gaps between the push block on the pressing block, the pressing block, and the bar-shaped workpiece in the clamping area. This not only facilitates placing the workpiece in the clamping area, but also can calibrate the position of the bar-shaped workpiece through two-point clamping, and can handle and blank the workpiece in the clamped state to ensure the stability of the workpiece throughout the process. Moreover, through the telescoping of the push block and the elastic member, elastic extrusion positioning of the workpiece can be achieved, avoiding damage or position deviation of the workpiece caused by hard contact, and improving the stability and reliability of clamping and positioning the workpiece.

[0014] 2. The blanking and handling component of the present invention further has an installation hole formed on the end surface of the other end of the pressing block and communicating with the groove. One end of a movable rod sequentially passes through the installation hole and the groove and is connected to the push block. The other end of the movable rod in sliding contact with the inner wall of the installation hole is connected to a retaining ring provided outside the pressing block. The length of the movable rod between the push block and the bottom surface of the groove is less than the length of the elastic member in the natural relaxed state, so that the elastic member sleeved outside the movable rod is always in a compressed state. This can not only provide a certain pre-pressure to improve the stability at the moment when the push block contacts the workpiece, but also effectively avoid the situation where the push block cannot contact the workpiece surface due to the deformation of the elastic member, further enhancing the stability of clamping the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG Figure 1 is a schematic structural diagram of the blanking and handling component of the present invention; FIG Figure 2 is a schematic diagram of the first state of the blanking and handling component of the present invention; FIG Figure 3 is a schematic diagram of the present invention Figure 2 at the enlarged view of part A; FIG Figure 4 is a schematic diagram of the partial structure of the blanking and handling component of the present invention Figure 1 ; FIGFigure 5 Schematic diagram of the second state of the blanking and handling component of the present invention; Appendix Figure 6 Partial structural schematic diagram of the blanking and handling component of the present invention Figure 2 ; Appendix Figure 7 Overall sectional structural schematic diagram of the appendix of the present invention Figure 6 ; Appendix Figure 8 Partial structural schematic diagram of the blanking and handling component of the present invention in the first state.

[0016] In the above figures: 100, bar-shaped workpiece; 1, movable plate; 2, supporting vertical plate; 31, housing; 32, movable block; 33, motor; 4, receiving block; 41, horizontal part; 42, vertical part; 5, sliding plate; 6, extrusion block; 61, body part; 62, external connection part; 7, cylinder; 81, slide rail; 82, slider; 9, connecting rod; 11, groove; 12, elastic part; 13, pushing block; 131, flanging part; 14, mounting hole; 15, movable rod; 16, retaining ring; 171, first interval; 172, second interval; 18, gasket. Embodiment

[0017] The following specific embodiments can further clearly understand the present patent, but they do not limit the present patent.

[0018] Embodiment 1: A blanking and handling component, comprising: a movable plate 1 that can move in the vertical direction and two supporting vertical plates 2 installed on one side surface of the movable plate 1. One ends of the two parallel and spaced-apart supporting vertical plates 2 are connected to the movable plate 1, and the other ends are vertically away from the movable plate 1. At least one receiving block 4 is arranged on the upper surfaces of the supporting vertical plates 2. The horizontal part 41 of the L-shaped receiving block 4 is connected to the supporting vertical plate 2. A sliding plate 5 is slidably installed on the side surface of the supporting vertical plate 2. At least one extrusion block 6 corresponding to the vertical part 42 of the receiving block 4 is installed on the upper part of the sliding plate 5. A clamping area for the bar-shaped workpiece 100 to be inserted is formed between the extrusion block 6 and the vertical part 42 of the receiving block 4 and above the horizontal part 41 of the receiving block 4. A cylinder 7 is installed on the supporting vertical plate 2 and below the sliding plate 5. The piston rod of the cylinder 7 is connected to the sliding plate 5; A groove 11 is formed on the end face of the extrusion block 6 facing one end of the vertical portion 42 of the material receiving block 4. One end of an elastic member 12 is embedded in the groove 11 and contacts the bottom surface of the groove 11, and the other end of the elastic member 12 is connected to a push block 13 arranged outside the extrusion block 6. When the piston rod of the cylinder 7 is in the first state, the vertical portion 42 of the material receiving block 4 and the push block 13 on the corresponding extrusion block 6 are both in extrusion contact with the strip-shaped workpiece 100 located in the clamping area. When the piston rod of the cylinder 7 is in the second state, the elastic member 12 is in a natural relaxation state, and there are intervals between the push block 13 on the extrusion block 6, the extrusion block 6, and the strip-shaped workpiece 100 in the clamping area.

[0019] An installation hole 14 communicating with the groove 11 is formed on the end face of the other end of the extrusion block 6. One end of a movable rod 15 sequentially passes through the installation hole 14 and the groove 11 and is connected to the push block 13. The other end of the movable rod 15 in sliding contact with the inner wall of the installation hole 14 is connected to a retaining ring 16 arranged outside the extrusion block 6. The length of the movable rod 15 between the push block 13 and the bottom surface of the groove 11 is less than the length of the elastic member 12 in the natural relaxation state, so that the elastic member 12 sleeved outside the movable rod 15 is always in a compressed state.

[0020] When the retaining ring 16 is in extrusion contact with the end face of one end of the extrusion block 6, a second interval 172 is formed between the surface of the push block 13 facing the extrusion block 6 and the extrusion block 6, and the second interval 172 is smaller than the first interval 171 formed between the push block 13 and the extrusion block 6 when the elastic member 12 is in the natural relaxation state.

[0021] One side of the main body portion 61 of the extrusion block 6 has an external connection portion 62, and the external connection portion 62 is connected to the sliding plate 5.

[0022] The elastic member 12 is a spring.

[0023] The movable rod 15 is fixedly connected to the push block 13 and the retaining ring 16 by bolts.

[0024] A gasket 18 is arranged between the movable rod 15 and the push block 13.

[0025] At least one edge of the push block 13 has a folded edge portion 131 extending along the axial direction of the movable rod 15, and the surface of the folded edge portion 131 facing the extrusion block 6 is in sliding contact with the outer surface of the extrusion block 6.

[0026] The other surface of the movable plate 1 is connected to the movable portion of a vertical conveying mechanism.

[0027] The vertical conveying mechanism is a belt conveying mechanism.

[0028] When in use, first move the movable plate to a lower position so that each receiving block is located directly below the workpiece to be unloaded, and place the piston rod of the cylinder in the second state. At this time, the spring in the extrusion state is not subject to external force, and the retaining ring maintains extrusion contact with the end face of one end of the extrusion block under the pull of the movable rod, and at this time, the interval formed between the push block and the extrusion block is the largest; Then drive the movable plate upward so that each workpiece falls into two clamping areas accordingly; Afterwards, the piston rod of the cylinder is switched to the first state. During this process, the extrusion block drives the push block to move along with the sliding plate toward the vertical part of the corresponding receiving block until it is in extrusion contact with the workpiece located in the clamping area. At this time, the push block is subjected to the reaction force from the workpiece and squeezes the spring, pushing the movable rod to move so that the retaining ring is separated from the fixed seat and the interval between the push block and the fixed seat is reduced, and at the same time, the elastic extrusion positioning of the workpiece is realized. During this process, the elastic member in the extrusion state provides a certain pre-pressure for the push block to improve the stability of the push block at the moment of contact with the object, and the movable rod is used to limit and guide the elastic member to avoid the situation where the push block is offset and cannot contact the object surface due to the deformation of the elastic member, and the position of the strip workpiece is calibrated while the workpiece is clamped by two-point clamping; Then the movable plate is driven to move up to a certain height to facilitate the picking operation of the workpiece by the external docking device in the subsequent process.

[0029] Embodiment 2: A material unloading and handling assembly comprises: a movable plate 1 movable in the vertical direction and two supporting upright plates 2 installed on one side surface of the movable plate 1, the two supporting upright plates 2 arranged in parallel and at intervals each having one end connected to the movable plate 1 and the other end vertically away from the movable plate 1, at least one material receiving block 4 is arranged on the upper surface of each supporting upright plate 2, a horizontal portion 41 of the L-shaped material receiving block 4 is connected to the supporting upright plate 2, a sliding plate 5 is slidably installed on the side surface of the supporting upright plate 2, at least one extrusion block 6 corresponding to the vertical portion 42 of the material receiving block 4 is installed on the upper portion of the sliding plate 5, a clamping area for a strip-shaped workpiece 100 to be embedded is formed between the extrusion block 6 and the vertical portion 42 of the material receiving block 4 and above the horizontal portion 41 of the material receiving block 4, a cylinder 7 is installed on the supporting upright plate 2 and below the sliding plate 5, and the piston rod of the cylinder 7 is connected to the sliding plate 5; A groove 11 is provided on the end surface of the vertical portion 42 of the extrusion block 6 facing the material receiving block 4, one end of an elastic member 12 is embedded in the groove 11 and contacts the bottom surface of the groove 11, and the other end of the elastic member 12 is connected to a push block 13 arranged on the outside of the extrusion block 6. When the piston rod of the cylinder 7 is in the first state, the vertical portion 42 of the material receiving block 4 and the push block 13 on the corresponding extrusion block 6 are both in compression contact with the strip workpiece 100 in the clamping area. When the piston rod of the cylinder 7 is in the second state, the elastic member 12 is in a naturally relaxed state and the push block 13 on the extrusion block 6 is spaced apart from the extrusion block 6 and the strip workpiece 100 in the clamping area. A mounting hole 14 is provided on the end face of the other end of the extrusion block 6 and is connected to the groove 11. One end of a movable rod 15 passes through the mounting hole 14 and the groove 11 in sequence and is connected to the push block 13. The other end of the movable rod 15 that is in sliding contact with the inner wall of the mounting hole 14 is connected to a retaining ring 16 arranged on the outside of the extrusion block 6. The length of the movable rod 15 between the push block 13 and the bottom surface of the groove 11 is shorter than the length of the elastic member 12 in a naturally relaxed state, so that the elastic member 12 mounted on the outside of the movable rod 15 is always in a compressed state.

[0030] One side of the main body 61 of the extrusion block 6 has an external connection portion 62 , and the external connection portion 62 is connected to the sliding plate 5 .

[0031] The elastic member 12 is a spring. When the piston rod of the cylinder is placed in the second state, the spring is not subjected to external force, and the interval formed between the push block and the extrusion block is the largest.

[0032] The other side surface of the movable plate 1 is connected to the movable part of a vertical conveying mechanism. The vertical conveying mechanism drives the movable plate to move up so that each workpiece falls into two clamping areas accordingly. After the workpiece is clamped, the movable plate is driven to move up to a certain height to facilitate the picking operation of the workpiece by the external docking device of the subsequent process.

[0033] The above-mentioned vertical transmission mechanism is a screw transmission mechanism.

[0034] The above-mentioned screw transmission mechanism further includes: a vertically extending shell 31, a screw rotatably mounted on the shell 31 and a motor 33 mounted on the shell 31 and connected to one end of the screw, a movable block 32 is mounted on the vertically extending screw and is threadedly connected to the screw, and the movable plate 1 is mounted on the movable block 32.

[0035] The motor 33 is installed at the lower end of the housing 31 .

[0036] The upper surface of the pushing block 13 is flush with the upper surface of the vertical portion 42 of the receiving block 4 .

[0037] The sliding plates 5 are respectively installed on the side surfaces of the two supporting upright plates 2 which are opposite to each other.

[0038] There are four receiving blocks 4 and four extruding blocks 6 , which are arranged at equal intervals along the length direction of the supporting vertical plate 2 .

[0039] The sliding plate 5 is installed on the supporting upright plate 2 via a sliding rail 81 extending along the length direction of the supporting upright plate 2 and at least two sliding blocks 82 cooperating with the sliding rail 81 .

[0040] The piston rod of the cylinder 7 is connected to the lower surface of the sliding plate 5 via a connecting rod 9 .

[0041] When in use, first move the movable plate to a lower position so that each receiving block is located directly below the workpiece to be unloaded, and place the piston rod of the cylinder in the second state, at which time the spring is not subjected to external force, and the interval between the push block and the extrusion block is the largest; Then drive the movable plate upward so that each workpiece falls into two clamping areas accordingly; Afterwards, the piston rod of the air cylinder is switched to the first state. During this process, the extrusion block drives the push block to move along with the sliding plate toward the vertical part of the corresponding receiving block until it is in extrusion contact with the workpiece located in the clamping area. At this time, the push block is subjected to the reaction force from the workpiece and compresses the spring. The interval between the push block and the extrusion block is reduced, and the elastic extrusion positioning of the workpiece is realized at the same time. The position of the strip workpiece is calibrated while the workpiece is clamped by two-point clamping. Then the movable plate is driven to move up to a certain height to facilitate the picking operation of the workpiece by the external docking device in the subsequent process.

[0042] The above-mentioned material unloading and handling assembly is adopted, which not only facilitates the placement of the workpiece in the clamping area, but also can calibrate the position of the strip workpiece through two-point clamping, and can unload the workpiece in the clamping state to ensure the stability of the workpiece during the whole process, and can also realize elastic extrusion positioning of the workpiece through the extension and contraction of the push block and the elastic member, thereby avoiding damage or position displacement of the workpiece caused by hard contact, and improving the stability and reliability of clamping and positioning of the workpiece; further, it can provide a certain pre-pressure to improve the stability of the push block at the moment of contact with the workpiece, and can effectively avoid the situation where the push block is offset due to deformation of the elastic member and cannot contact the workpiece surface, thereby further improving the stability of the workpiece clamping.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A blanking and handling component, comprising: A movable plate (1) that can move in the vertical direction and two supporting vertical plates (2) installed on one side surface of the movable plate (1), one end of each of the two supporting vertical plates (2) arranged in parallel and at intervals is connected to the movable plate (1), and the other end is vertically away from the movable plate (1). It is characterized in that: at least one material receiving block (4) is arranged on the upper surface of each of the supporting vertical plates (2), the horizontal part (41) of the L-shaped material receiving block (4) is connected to the supporting vertical plate (2), a sliding plate (5) is slidably installed on the side surface of the supporting vertical plate (2), at least one pressing block (6) corresponding to the vertical part (42) of the material receiving block (4) is installed on the upper part of the sliding plate (5), and a clamping area for the strip-shaped workpiece (100) to be inserted is formed between the pressing block (6) and the vertical part (42) of the material receiving block (4) and above the horizontal part (41) of the material receiving block (4). A cylinder (7) is installed on the supporting vertical plate (2) and below the sliding plate (5), and the piston rod of the cylinder (7) is connected to the sliding plate (5); A groove (11) is formed on the end surface of one end of the pressing block (6) facing the vertical part (42) of the material receiving block (4). One end of an elastic member (12) is embedded in the groove (11) and contacts the bottom surface of the groove (11), and the other end of the elastic member (12) is connected to a push block (13) arranged outside the pressing block (6). When the piston rod of the cylinder (7) is in the first state, the vertical part (42) of the material receiving block (4) and the push block (13) on the corresponding pressing block (6) are both in pressing contact with the strip-shaped workpiece (100) located in the clamping area. When the piston rod of the cylinder (7) is in the second state, the elastic member (12) is in a natural relaxation state, and there are intervals between the push block (13) on the pressing block (6), the pressing block (6), and the strip-shaped workpiece (100) in the clamping area.

2. The extrusion positioning component according to claim 1, wherein: An installation hole (14) communicating with the groove (11) is formed on the end surface of the other end of the pressing block (6). One end of a movable rod (15) passes through the installation hole (14) and the groove (11) in sequence and is connected to the push block (13). The other end of the movable rod (15) in sliding contact with the inner wall of the installation hole (14) is connected to a retaining ring (16) arranged outside the pressing block (6). The length of the movable rod (15) between the push block (13) and the bottom surface of the groove (11) is less than the length of the elastic member (12) in the natural relaxation state, so that the elastic member (12) sleeved outside the movable rod (15) is always in a compressed state.

3. The extrusion positioning component according to claim 2, wherein: When the retaining ring (16) is in pressing contact with the end surface of one end of the pressing block (6), a second interval (172) is formed between the surface of the push block (13) facing the pressing block (6) and the pressing block (6), and the second interval (172) is smaller than the first interval (171) formed between the push block (13) and the pressing block (6) when the elastic member (12) is in the natural relaxation state.

4. The extrusion positioning component according to any one of claims 1 to 3, characterized in that: One side of the body part (61) of the extrusion block (6) has an external connection part (62), and the external connection part (62) is connected to the sliding plate (5).

5. The blanking and handling assembly according to claim 1, wherein: The other side surface of the movable plate (1) is connected to the movable part of a vertical transmission mechanism.

6. The blanking and handling assembly according to claim 5, wherein: The vertical transmission mechanism is a lead screw transmission mechanism or a belt transmission mechanism.

7. The blanking and handling assembly according to claim 6, wherein: The lead screw transmission mechanism further includes: a housing (31) extending vertically, a lead screw rotatably installed on the housing (31), and a motor (33) installed on the housing (31) and connected to one end of the lead screw. A movable block (32) is sleeved on the vertically extending lead screw and is in threaded connection with the lead screw, and the movable plate (1) is installed on the movable block (32).

8. The blanking and handling assembly according to claim 7, characterized in that: The motor (33) is installed at the lower end of the housing (31).