Automatic positioning and lifting mechanism for tooth-shaped material box

Abstract

The utility model discloses a tooth shape material box automatic deferring lift -hinge mechanism relates to the field of semiconductor automatic technology, including material box conveying mechanism, the side of material box conveying mechanism is provided with material box lift -hinge mechanism, the outside of material box lift -hinge mechanism is provided with material box discharge mechanism, the top fixedly connected with product push -out mechanism of material box discharge mechanism, the top inside of material box conveying mechanism is provided with a plurality of tooth shape material box bodies. The utility model discloses through the mechanical drive cooperation of roller, inclined plane slide, spring and connecting rod, simultaneously drives the material receiving mechanism to complete the state switching of stretching out material receiving and retracting deferring, eliminates the problem that adjacent tooth shape material box contacts and scratches, turns over in the material box lifting process from the physical level.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor automation technology, and in particular to an automatic repositioning and lifting mechanism for toothed hoppers. Background Technology

[0002] In the context of the semiconductor packaging and manufacturing industry's upgrade towards highly automated and high-precision processes, traditional flat-stack receiving boxes are prone to causing friction scratches on the surfaces of lead frames, wafers, and other workpieces, and are difficult to adapt to the precise picking and placing operations of automated equipment, thus failing to meet the production line's requirements for material protection and turnover efficiency. Toothed boxes, with their internally spaced supporting grooves, can independently store workpieces in layers, physically preventing contact damage between adjacent workpieces. At the same time, their standardized slot design can perfectly match the operating logic of wire bonding machines, molding equipment, automated grippers, and other devices, and therefore are widely used for material storage and transfer between processes such as wire bonding, molding, and dicing in semiconductor packaging.

[0003] In existing toothed cassette systems, the cassette conveying mechanism typically loads multiple cassettes with plastic-sealed lead frames. The conveying mechanism then pushes these cassettes together into the cassette lifting mechanism. The first cassette to contact the lifting mechanism is gripped and moved up and down. However, the second cassette is still in contact with the first, and this lifting motion can cause scraping, leading to the cassette tipping over and damaging the cassette and the product, potentially also damaging the mechanism itself. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an automatic repositioning and lifting mechanism for toothed material boxes, which solves the risk of scraping and tipping that may occur during the transport of existing material boxes.

[0005] This invention addresses the problem of potential scraping and tipping of material boxes during lifting and lowering, which can damage both the boxes and products. Through a collaborative design that precisely conveys the material box, lifts and lowers it step-by-step according to a toothed pitch, and automatically ejects workpieces and empty boxes at designated points, the invention eliminates the risk of scraping and tipping during lifting and lowering. This effectively protects the material boxes and the plastic-sealed lead frame, improves product yield, achieves fully automated closed-loop operation, enhances production line efficiency and stability, and reduces material loss and maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic repositioning and lifting mechanism for toothed material boxes includes a material box conveying mechanism, a material box lifting mechanism on the side of the material box conveying mechanism, a material box discharge mechanism on the outside of the material box lifting mechanism, a product ejection mechanism fixedly connected to the top of the material box discharge mechanism, and a plurality of toothed material box bodies disposed inside the top of the material box conveying mechanism. The material box lifting mechanism includes a mounting base and a movable block. A support column is fixedly connected to the side of the mounting base near the toothed material box body. A receiving mechanism is disposed on the side of the movable block away from the support column. A connecting rod is disposed on the side of the receiving mechanism near the movable block, and a [missing information - likely a component or component] is disposed on the other side of the connecting rod. The inclined slide plate, with the receiving mechanism fixedly connected to one end of the connecting rod and the inclined slide plate fixedly connected to the other end of the connecting rod, is a multi-mechanism integrated structure. The connecting rod passes through the interior of the movable block. Several springs are fixedly connected to the side of the movable block closest to the inclined slide plate, and rollers are positioned on the side of the inclined slide plate away from the springs. The material box lifting mechanism drives the receiving mechanism to move up and down. The inclined slide plate consists of an inclined surface and a vertical surface. During the descent of the material box lifting mechanism, the contact between the inclined slide plate and the rollers gradually changes from vertical to inclined surface contact, synchronously driving the receiving mechanism to extend and retract. This multi-mechanism integrated arrangement enables continuous automated operation of toothed material box conveying, lifting and unloading, and empty box discharge, effectively improving material turnover efficiency and production line automation. By utilizing the coordination between the inclined slide plate and the rollers during the lifting process, from vertical to inclined surface contact, the receiving mechanism can be synchronously driven to extend and retract, with smooth transitions and precise synchronization with the lifting stroke, eliminating the need for additional drive components.

[0008] As a further improvement of this utility model, the material box conveying mechanism is a supporting mechanism for the toothed material box body. The material box conveying mechanism is used to push the toothed material box body, which carries the plastic-sealed lead frame, into the material box lifting mechanism. The material box lifting mechanism is a driving mechanism for the lifting movement of the toothed material box body. The material box lifting mechanism is used to lower the toothed material box body carrying the plastic-sealed lead frame to the height of the product ejection mechanism. The product ejection mechanism is used to eject the plastic-sealed lead frame from the toothed material box body. The material box lifting mechanism descends sequentially according to the toothed step distance in the toothed material box body until all the plastic-sealed lead frames in the toothed material box body are ejected. After the material box lifting mechanism reaches the discharge position of the toothed material box body, the material box discharge mechanism pulls out the empty material box. The material box discharge mechanism is used to pull the empty material box out from the product ejection mechanism. Through the coordinated functions of multiple mechanisms—material box conveying, step-by-step lifting, workpiece ejection, and empty box discharge—the layer-by-layer discharge of the plastic-sealed lead frame and the automatic discharge of the empty box can be completed according to the toothed shape, thus forming a closed loop of complete automated operation.

[0009] As a further improvement of this utility model, the mounting base is fixedly connected to the top of the material box discharge mechanism. A support column is fixedly connected to the side of the mounting base near the toothed material box body. The support column is disposed through the interior of the material box discharge mechanism. An upper mounting plate is fixedly connected to the top of the support column, and a lower mounting plate is fixedly connected to the bottom of the support column. The support structure formed by the mounting base, the through-type support column, and the upper and lower mounting plates can improve the structural rigidity and operational stability of the lifting mechanism, while achieving integrated arrangement with the material box discharge mechanism.

[0010] As a further improvement of this utility model, a motor is provided at the bottom end of the lower mounting plate, and a lead screw is provided at the top output end of the motor. The top end of the lead screw is rotatably connected to the bottom end of the upper mounting plate. Two straight shafts are symmetrically fixedly connected to the top end of the lower mounting plate on both sides of the lead screw. Both straight shafts are fixedly connected to the bottom end of the upper mounting plate and are slidably disposed inside the movable block. The lead screw is used to control the movement of the movable block. By employing a motor-driven lead screw transmission combined with a double-sided symmetrical straight shaft guide structure, the lifting displacement and step distance of the movable block can be precisely controlled, while ensuring smooth operation without swaying during the lifting process, thereby effectively improving the lifting positioning accuracy and structural operational stability.

[0011] Compared with the prior art, the advantages of this utility model are as follows:

[0012] 1. Utilizing a purely mechanically linked automatic yielding structure, the lifting mechanism's own lifting action, along with the mechanical transmission of rollers, inclined slides, springs, and connecting rods, synchronously drives the receiving mechanism to switch between extending to receive materials and retracting to yield. This physically eliminates the problem of adjacent toothed material boxes rubbing against each other or tipping over during the lifting process, effectively protecting the toothed material boxes and their internal precision plastic-sealed lead frame. Furthermore, the entire yielding process requires no additional drive cylinders, position sensors, or independent control programs; it is completely synchronized with the lifting action, eliminating the risk of electrical control response delays and signal misinterpretation, thus simplifying the number of pneumatic and electrical control components in the equipment.

[0013] 2. The material box lifting mechanism adopts a screw drive combined with a dual-axis symmetrical guide structure. A servo motor precisely controls the lifting step distance, achieving high-precision matching with the toothed groove spacing of the toothed material box body. It possesses high positioning accuracy and stable operation, ensuring that each layer of the plastic-sealed lead frame is precisely aligned with the product ejection mechanism, preventing scratches to the workpiece or material box caused by misalignment during the ejection process. Simultaneously, the dual-axis symmetrical guide structure effectively counteracts the lateral force generated during the extension and retraction of the receiving mechanism, preventing uneven wear and jamming of components caused by lifting movements.

[0014] 3. By coordinating the material box conveying mechanism, material box lifting mechanism, product ejection mechanism, and material box discharge mechanism in a timely manner, a fully automated closed-loop operation is constructed, encompassing material box conveying, step-by-step layered material discharge, and empty box discharge. This effectively improves the material turnover efficiency of the production line and reduces cleanliness contamination and operational risks caused by manual intervention. Simultaneously, a single lifting stroke of the lifting mechanism can simultaneously complete multiple functions, including obstacle avoidance, slot step-by-step alignment, and empty box discharge positioning, thus coupling and compressing the action sequence of multiple processes. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the material box lifting mechanism in this utility model.

[0017] Figure 3 This is a schematic diagram of the planar structure of the material box lifting mechanism in this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the toothed material box in this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the material receiving mechanism, connecting rod, and inclined sliding plate in this utility model.

[0020] In the diagram: 1. Material box conveying mechanism; 2. Material box lifting mechanism; 201. Mounting base; 202. Support column; 203. Upper mounting plate; 204. Lower mounting plate; 205. Motor; 206. Lead screw; 207. Straight shaft; 208. Movable block; 209. Material receiving mechanism; 210. Roller; 211. Inclined slide plate; 212. Spring; 213. Connecting rod; 3. Product ejection mechanism; 4. Material box discharge mechanism; 5. Toothed material box body. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] Reference Figures 1-5 An automatic repositioning and lifting mechanism for a toothed material box includes a material box conveying mechanism 1, a material box lifting mechanism 2, a product ejection mechanism 3, a material box discharge mechanism 4, a toothed material box body 5, a mounting base 201, a support column 202, an upper mounting plate 203, a lower mounting plate 204, a motor 205, a lead screw 206, a straight shaft 207, a movable block 208, a receiving mechanism 209, a roller 210, an inclined slide plate 211, a spring 212, and a connecting rod 213.

[0024] In this embodiment, the toothed material box automatic clearance and lifting mechanism of the present invention includes a material box conveying mechanism 1, a material box lifting mechanism 2 is provided on the side of the material box conveying mechanism 1, a material box discharge mechanism 4 is provided on the outside of the material box lifting mechanism 2, a product ejection mechanism 3 is fixedly connected to the top of the material box discharge mechanism 4, and a plurality of toothed material box bodies 5 are provided inside the top of the material box conveying mechanism 1.

[0025] The material box lifting mechanism 2 includes a mounting base 201 and a movable block 208. The mounting base 201 is fixedly connected to the top of the material box discharge mechanism 4. A support column 202 is fixedly connected to the side of the mounting base 201 near the toothed material box body 5. The support column 202 is installed inside the material box discharge mechanism 4. An upper mounting plate 203 is fixedly connected to the top of the support column 202, and a lower mounting plate 204 is fixedly connected to the bottom of the support column 202. A motor 205 is installed at the bottom of the lower mounting plate 204, and a lead screw 206 is installed at the top output end of the motor 205. The top of the lead screw 206 is rotatably connected to the bottom of the upper mounting plate 203. Two straight shafts 207 are symmetrically fixedly connected to the top of the lower mounting plate 204 on both sides of the lead screw 206. Both straight shafts 207 are fixedly connected to the bottom of the upper mounting plate 203 and are slidably installed inside the movable block 208. The lifting and lowering movement of the movable block 208 is controlled by the rotation of the lead screw 206. The support structure consisting of mounting base 201, support column 202 and upper and lower mounting plates can improve the structural rigidity and operational stability of the material box lifting mechanism 2, while also achieving integrated arrangement with the material box discharge mechanism 4.

[0026] A receiving mechanism 209 is provided on the side of the movable block 208 away from the support column 202. The receiving mechanism 209 is fixedly connected to one end of the connecting rod 213, and the inclined slide plate 211 is fixedly connected to the other end of the connecting rod 213. The connecting rod 213 is inserted through the interior of the movable block 208 and can slide horizontally along the through hole of the movable block 208. Several springs 212 are fixedly connected to the side of the movable block 208 near the inclined slide plate 211, and the other end of the springs 212 abuts against the side end face of the inclined slide plate 211. A roller 210 is provided on the side of the inclined slide plate 211 away from the springs 212. The material box lifting mechanism 2 can drive the receiving mechanism 209 to move up and down. The installation position of the roller 210 corresponds to the plate surface of the inclined slide plate 211. The upper part of the plate surface of the inclined slide plate 211 is a vertical surface, and the lower part is an inclined surface. During the descent of the material box lifting mechanism 2, the inclined slide plate 211 and roller 210 gradually change from vertical surface contact to inclined surface contact. This gradual change from vertical surface contact to inclined surface contact is used to synchronously drive the receiving mechanism 209 to achieve extension and retraction. Driven by the lifting motion itself, the roller 210 cooperates with the inclined slide plate 211 (which has both vertical and inclined sections), while the spring 212 returns to its original position and the connecting rod 213 transmits power. This allows for the synchronous extension and retraction of the receiving mechanism 209 without the need for additional drive components. The structure is compact, the action is highly synchronized, and it effectively prevents adjacent material boxes from scraping or colliding during the lifting process.

[0027] In this mechanism, the cassette conveying mechanism 1 is the carrying and conveying mechanism for the toothed cassette body 5, used to push the toothed cassette body 5, which is loaded with the plastic-sealed lead frame, into the cassette lifting mechanism 2. The cassette lifting mechanism 2 is the driving mechanism for the lifting and lowering movement of the toothed cassette body 5, used to lower the toothed cassette body 5, which is loaded with the plastic-sealed lead frame, to the working height of the product ejection mechanism 3. The product ejection mechanism 3 is used to eject the plastic-sealed lead frame inside the toothed cassette body 5. The cassette lifting mechanism 2 can descend sequentially according to the toothed step distance in the toothed cassette body 5 until all the plastic-sealed lead frames in the toothed cassette body 5 are ejected. After the cassette lifting mechanism 2 descends to the discharge position of the toothed cassette body 5, the empty cassette is pulled out by the cassette discharge mechanism 4. The cassette discharge mechanism 4 is used to pull the empty cassette from the receiving mechanism 209 and transport it to the collection station. Through the coordinated efforts of multiple mechanisms including conveying, lifting, pushing, and discharging, the entire process of feeding the toothed box body 5, discharging material layer by layer according to the toothed pitch, and discharging empty boxes can be completed in an orderly manner. The process is seamless and highly automated.

[0028] In the initial state of use, the material box lifting mechanism 2 rises to the high receiving position, the roller 210 abuts against the upper vertical surface of the inclined slide plate 211, the spring 212 is compressed, and the connecting rod 213 pushes the receiving mechanism 209 to extend towards the side of the material box conveying mechanism 1, so that the receiving inlet of the receiving mechanism 209 is precisely aligned with the discharge end of the material box conveying mechanism 1. Then the material box conveying mechanism 1 starts, and the first toothed material box body 5 with a plastic sealing lead frame arranged at its top is horizontally pushed into the receiving mechanism 209, and the receiving mechanism 209 completes the support and positioning of the material box.

[0029] After receiving the material, motor 205 starts, driving movable block 208 downward along straight axis 207 via lead screw 206. Receiving mechanism 209 and toothed box body 5 descend synchronously with movable block 208. During descent, roller 210 moves upward relative to inclined slide plate 211, gradually transitioning the contact surface from vertical to inclined. Spring 212 gradually reduces compression and returns to its original length, pushing inclined slide plate 211 to move away from box conveying mechanism 1. This, in turn, pulls receiving mechanism 209 inward via connecting rod 213. After receiving mechanism 209 retracts, the toothed box body 5 it supports moves backward, creating a clearance gap between it and the next toothed box body 5 to be conveyed on box conveying mechanism 1. The two no longer contact each other, physically preventing adjacent boxes from scraping or colliding during lifting and lowering, and preventing boxes from tipping over and damaging the encapsulated products inside.

[0030] The material box lifting mechanism 2 lowers the toothed material box body 5 to the working height of the product ejection mechanism 3 and then stops. The pusher of the product ejection mechanism 3 extends and horizontally pushes the plastic-encapsulated lead frame in the top toothed groove of the toothed material box body 5 to the downstream process station. After each layer of workpieces is ejected, the material box lifting mechanism 2 lowers by one groove height according to the toothed groove step distance of the toothed material box body 5, repeating the ejection action until all the plastic-encapsulated lead frames in the toothed material box body 5 are ejected.

[0031] After all workpieces in the toothed box body 5 have been ejected, the box lifting mechanism 2 continues to descend to the empty box discharge position. The box discharge mechanism 4 is activated, pulling the empty toothed box body 5 horizontally out of the receiving mechanism 209 and conveying it to the empty box collection station. After discharge, the motor 205 rotates in the reverse direction, driving the movable block 208 and the receiving mechanism 209 to rise and reset to the high receiving position. The inclined slide plate 211 then moves upward, the roller 210 re-abuts the vertical surface, the spring 212 is compressed, and the receiving mechanism 209 extends again, waiting for the next box to be fed in. This cycle achieves continuous automated operation.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic repositioning and lifting mechanism for a toothed material box, comprising a material box conveying mechanism (1), characterized in that, The side of the material box conveying mechanism (1) is provided with a material box lifting mechanism (2), the outside of the material box lifting mechanism (2) is provided with a material box discharge mechanism (4), the top of the material box discharge mechanism (4) is fixedly connected with a product ejection mechanism (3), the top of the material box conveying mechanism (1) is provided with a plurality of toothed material box bodies (5), the material box lifting mechanism (2) includes a mounting base (201) and a movable block (208), the mounting base (201) is fixedly connected with a support column (202) on the side near the toothed material box body (5), the movable block (208) is provided with a receiving mechanism (209) on the side away from the support column (202), the receiving mechanism (209) is provided with a connecting rod (213) on the side near the movable block (208), the other side of the connecting rod (213) is provided with an inclined slide plate (211), the receiving mechanism ( 209) is fixedly connected to one end of the connecting rod (213), and the inclined slide plate (211) is fixedly connected to the other end of the connecting rod (213). The connecting rod (213) is installed through the interior of the movable block (208). Several springs (212) are fixedly connected to the side of the movable block (208) near the inclined slide plate (211). Rollers (210) are provided on the side of the inclined slide plate (211) away from the springs (212). The material box lifting mechanism (2) can drive the receiving mechanism (209) to perform lifting and lowering movements. The inclined slide plate (211) is composed of two parts: an inclined surface and a vertical surface. During the descent movement of the material box lifting mechanism (2), the inclined slide plate (211) and the roller (210) gradually change from vertical surface contact to inclined surface contact. The gradual change from vertical surface contact to inclined surface contact is used to synchronously drive the receiving mechanism (209) to achieve extension and retraction.

2. The automatic clearance and lifting mechanism for a toothed material box according to claim 1, characterized in that, The material box conveying mechanism (1) is the bearing mechanism of the toothed material box body (5). The material box conveying mechanism (1) is used to push the toothed material box body (5) loaded with the plastic sealing lead frame into the material box lifting mechanism (2). The material box lifting mechanism (2) is the driving mechanism for the lifting and lowering movement of the toothed material box body (5). The material box lifting mechanism (2) is used to lower the toothed material box body (5) loaded with the plastic sealing lead frame to the height of the product ejection mechanism (3). The product ejection mechanism (3) is used to eject the plastic sealing lead frame of the toothed material box body (5). The material box lifting mechanism (2) moves downward in sequence according to the toothed step distance in the toothed material box body (5) until all the plastic sealing lead frames in the toothed material box body (5) are ejected. After the material box lifting mechanism (2) is lowered to the discharge position of the toothed material box body (5), the empty material box is pulled out by the material box discharge mechanism (4). The material box discharge mechanism (4) is used to pull the empty material box out from the product ejection mechanism (3).

3. The automatic repositioning and lifting mechanism for a toothed material box according to claim 1, characterized in that, The mounting base (201) is fixedly connected to the top of the material box discharge mechanism (4), and the support column (202) is disposed through the inside of the material box discharge mechanism (4). The top of the support column (202) is fixedly connected to the upper mounting plate (203), and the bottom of the support column (202) is fixedly connected to the lower mounting plate (204).

4. The automatic repositioning and lifting mechanism for a toothed material box according to claim 3, characterized in that, A motor (205) is provided at the bottom end of the lower mounting plate (204), and a lead screw (206) is provided at the top output end of the motor (205). The top end of the lead screw (206) is rotatably connected to the bottom end of the upper mounting plate (203). Two straight shafts (207) are symmetrically fixedly connected on both sides of the lead screw (206) at the top end of the lower mounting plate (204). Both straight shafts (207) are fixedly connected to the bottom end of the upper mounting plate (203). The two straight shafts (207) are slidably connected inside the movable block (208). The lead screw (206) is used to control the movement of the movable block (208).

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