Discharging auxiliary device of sheet metal part transport vehicle

Abstract

The invention discloses an unloading auxiliary device of a sheet metal part transport vehicle, and belongs to the technical field of sheet metal part unloading. Comprising an unloading unit and a bearing unit, a horn mouth-straight groove communicates with a slideway, two walls are parallel, the width is consistent with that of a rigid tray, parts are automatically centered after entering the slideway, and rotation and clamping stagnation are avoided in the whole gliding process; when two pieces are put back to back, the two pieces slide down naturally in a staggered mode through friction difference in grooves and center-of-gravity shift, a'double-layer stacking 'stack shape is directly formed at an outlet, a manual stacking procedure is omitted, and the labor intensity of workers is reduced. The tail end of the straight groove is aligned with the center of the bearing module, and the part stably falls in the same posture; the elastic strip firstly absorbs impact kinetic energy, and then the rigid tray provides rigid support, so that soft-hard secondary buffering is formed, metal-metal direct collision is avoided, noise is remarkably reduced, and quality defects such as surface sinking and scratching are eliminated. The modular bearing platform is multipurpose, and the bearing module can be quickly inserted, pulled and replaced.

Description

Technical Field

[0001] This invention relates to the field of sheet metal unloading technology, and in particular to an unloading auxiliary device for a sheet metal transport vehicle. Background Technology

[0002] In the manufacturing of refrigerators, washing machines, and automotive parts, sheet metal parts are typically first stamped or laser-cut, then stacked on transfer racks and transported to the next process. Traditional unloading methods often involve manual handling, free fall, or simple slide transitions: workers need to tilt the racks to the side, dumping the parts directly onto the ground or a simple roller conveyor, and then manually sort and stack them. This process is not only labor-intensive, but also makes thin-walled large panels (such as side panels and outer shells) highly susceptible to dents and scratches from drops, resulting in a high scrap rate for powder-coated or laminated surfaces. For small and medium-sized stamped parts that require precise alignment at all four corners for robot gripping, manual sorting cannot guarantee a positioning accuracy of 0.5mm, necessitating additional alignment stations in subsequent welding or assembly lines, increasing cycle time and cost.

[0003] To address the aforementioned issues, existing technologies have proposed two types of improvement solutions: Fixed-angle chutes: While reducing the drop height, the chute angle is not adjustable, failing to adapt to variations in vehicle model or part height; the impact persists when the drop difference between the outlet and the receiving surface is too large, while material jamming occurs when the drop difference is too small; Lifting platform + rigid pallet: Height is adjusted via hydraulic or screw lifting; however, the platform and chutes are separate components, requiring secondary repositioning after the part slides down, resulting in poor posture consistency; furthermore, the rigid pallet lacks cushioning, leading to loud metal-to-metal collision noise and surface scratches. Therefore, a material unloading auxiliary device for sheet metal parts transport vehicles is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an unloading auxiliary device for sheet metal transport vehicles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an unloading auxiliary device for a sheet metal transport vehicle, comprising an unloading unit and a receiving unit. A receiving unit that can be horizontally pushed and pulled is installed in the base area covered by the vertical projection of the unloading unit's slide rail outlet and the slide rail centerline L downward. The unloading unit includes a drive mechanism and a slide seat slidably mounted on the front end face of the drive mechanism. A slide rail is fixedly installed in front of the slide seat.

[0006] Preferably, the driving mechanism includes support columns and a top frame installed on the top of four sets of support columns. A vertical plate is vertically installed on the top of the top frame. A guide rail is installed at the center of the vertical plate. A sliding sleeve is slidably sleeved on the outer ring of the guide rail. The sliding sleeve can reciprocate and move up and down along the guide rail. Four support columns and the top frame form a rigid gantry frame, providing stable support for the entire unloading auxiliary device. The vertically set guide rails serve as linear guide rails, constraining the sliding sleeves to move only up and down, ensuring the repeatability of lifting and lowering. An external motor directly drives the sliding sleeve, which transmits the lifting motion to the slide rail through the sliding block, realizing a single-stage transmission from the external motor to the sliding sleeve, sliding block and slide rail, with the shortest structure and the smallest error; The external motor can be started and stopped at any position, ensuring that the exit of the slide and the receiving surface of the receiving module always maintain the optimal height difference, avoiding impact or jamming. When the model of the transport vehicle or the height of the sheet metal parts changes, no mechanical disassembly is required; height matching can be completed simply by jogging the motor, thus shortening the changeover time.

[0007] Preferably, the slide rail includes a straight groove and mounting ears installed on both sides of the lower end face of the straight groove, and the top of the straight groove is inclined outward to form a flared opening; The top flared opening flares outward, while the lower straight groove tapers inward, forming a continuous slide from the flared opening to the straight groove, smoothly guiding the sheet metal parts from higher positions into its own cavity. Workers only need to push the parts into the flared opening; the subsequent sliding, positioning, and stacking are all completed automatically, reducing handling effort. The inner walls of the straight groove are parallel and the width is consistent with the rigid pallet, ensuring that the sheet metal parts maintain their posture during sliding, preventing rotation or jamming. When two sheet metal parts of the same specification need to be pushed back to back into the flared opening at the same time, the natural friction difference in the groove and the shift of the center of gravity will cause the two pieces to slide down at different times; the exit will automatically form a "double-layer stack" shape, saving the need for manual stacking once.

[0008] The continuous slide rail and buffer design prevent parts from falling freely or colliding with each other, reducing the surface scratch rate by more than 80%; the slide rail length and inclination angle are fixed, the sliding time of each part is consistent, and the cycle time error of the entire production line is <±1s. The inner wall of the straight groove has a certain amount of friction and a slight inclination, which can reduce the sliding speed of sheet metal parts under no-power conditions and reduce the impact on the receiving module.

[0009] The lower outlet is directly opposite the receiving center of the receiving module, ensuring that the sheet metal parts fall onto the receiving module in the same position and posture each time, providing a consistent benchmark for subsequent handling or stacking. The entire assembly is rigidly connected to the slide block via a straight groove, allowing it to slide along with the slide block and achieve rapid alignment with different workstation receiving modules.

[0010] Preferably, the receiving unit includes a base and a push-pull handle installed at the edge of the upper surface of the base. One end of the push-pull handle is equipped with a receiving module, and the bottom of the receiving module is placed on the upper surface of the base.

[0011] The inner cavity of the guide beam is a precision straight groove, which forms a closed guide for the push-pull rod to prevent the cantilever from sagging. The front end face of the guide beam has an elongated hole, which allows the push-pull rod to extend while restricting its rotational freedom, ensuring that there is no wobble during the push-pull process.

[0012] The main handle is at the same height as an adult's elbow, which is ergonomic. The auxiliary handle can be used with both hands at the same time, or it can be pushed with one hand in a narrow space. One end of the push-pull rod is hinged to the receiving module, and the other end is fixed to the handle, directly converting human power into the horizontal movement of the receiving module.

[0013] Preferably, the receiving module includes a rigid tray and two sets of elastic strips arranged and installed inside the rigid tray cavity; The falling sheet metal parts first land on the low-friction surface of the elastic strip, instantly absorbing the impact energy, and then fall as a whole onto the rigid base plate of the rigid tray, forming a "soft-hard" secondary buffer.

[0014] Two sets of elastic strips are arranged at the same height to form coplanar support, preventing the sheet from warping or slipping due to local tilting. The surface hardness of the elastic strips is lower than that of sheet metal parts, avoiding direct metal-to-metal collisions, and reducing noise and scratches simultaneously. When worn or needing replacement, the elastic strips can be pulled out and replaced individually without disassembling the entire rigid pallet, with maintenance time of less than 1 minute; the top surfaces of all elastic strips together form a "virtual plane," providing a unified height reference for subsequent robot gripping or manual palletizing.

[0015] The planar array combination of rigid trays and elastic strips is best suited for large, thin-walled sheet metal parts that require "zero scratches" on their appearance. Typical examples include refrigerator side panels and washing machine outer shells, which can have an area of ​​0.5-1m². 2 Powder-coated pre-painted sheets with a thickness of 0.4-0.6mm. These parts are large in area and light in weight, and are prone to dents or coating scratches due to localized point contact during drop; the continuous elastic plane provided by the elastic strip can reduce the impact pressure to 0.02N / mm. 2 Meanwhile, noise is absorbed by the elastomer.

[0016] Preferably, the receiving module further includes a grid frame that can replace the rigid tray, and two sets of cross groove modules are arranged and installed in the inner cavity of the grid frame, with the upper end face of the cross groove module being set as a cross groove. The cross-groove grid of the grid frame and cross-groove module is designed for small to medium-sized stamped parts that require precise edge positioning and are subsequently directly grasped by robots, such as reinforcing brackets inside car doors, A-pillar reinforcing plates, and battery pack cooling plates. These parts are typically regular in shape, weigh 2-8kg, and require a stacking corner alignment error of less than 0.5mm, so that the robot can grasp multiple parts at once and place them into the welding fixture. The cross-groove provides four-sided limiting, naturally holding the parts in fixed grids. The groove spacing can be quickly switched at 30 / 40 / 50mm, compatible with length and width combinations ranging from 100-400mm. The 2mm gap left in the groove allows for direct separation by magnetic hands or vacuum suction cups, eliminating the traditional shaking and blowing process. When changing models, only the module needs to be changed, not the whole, making it more suitable for the needs of high-variety, high-cycle automotive production lines.

[0017] Preferably, the receiving module further includes a drain hole component that can replace the cross groove module, the center of the drain hole component is downward through, and the bottom of the drain hole component is attached to the bottom of the inner cavity wall of the grid frame; After removing all the cross-groove modules and replacing them with the perforated parts, the inner cavity of the grid frame becomes a hollow tray with a "central perforation + peripheral plane". It is suitable for sheet metal parts that require immediate chip removal and drainage, such as parts with slag and coolant residue after laser cutting. When it falls, the residual liquid can be directly recycled through the central through hole of the perforated parts.

[0018] It is also suitable for stamped parts that require partial blanking in the middle, such as electrical mounting plates with large windows and wheel hub covers. The window is aligned with the hole, and the parts are still supported by the edge of the hole, which saves tray material and prevents the window area from deforming due to suspension.

[0019] Workers simultaneously push single or back-to-back sheet metal parts of the same specification into the flared opening, automatically centering them and correcting their posture to prevent rotation.

[0020] Preferably, the opening width of the rigid tray is consistent with the opening width of the straight groove, the upper surface of the rigid tray coincides with the horizontal projection of the lower outlet of the straight groove at the end of the stroke of the horizontal push-pull handle unit, and the gap between the side of the tray and the outer wall of the straight groove is 2-5mm, forming a zero-interference connection.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: Four support columns are fixed to the top frame to form a gantry frame. The guide rail is arranged vertically and the sliding sleeve is constrained by a single degree of freedom, so that the slide can only move in a straight line up and down. The external motor directly drives the slide through a single-stage transmission chain of sliding sleeve → slide → mounting ear, which shortens the transmission path, reduces cumulative error, achieves a repeatability positioning accuracy of ±0.1mm, ensures a constant drop between the slide outlet and the bearing surface, and avoids impact or jamming.

[0022] The flared mouth-straight groove is a continuous slide with parallel walls and a width consistent with the rigid pallet. After the parts enter the slide, they automatically center and slide down without rotation or jamming. When two parts are put in back to back, they slide down in staggered time by taking advantage of the friction difference in the groove and the shift in the center of gravity. The exit directly forms a "double-layer stack" shape, saving a manual stacking process and reducing the labor intensity of workers.

[0023] The end of the straight groove is aligned with the center of the receiving module, and the parts fall smoothly in the same posture; the elastic strip first absorbs the impact kinetic energy, and the rigid tray then provides rigid support, forming a "soft-hard" secondary buffer, avoiding direct metal-to-metal collisions, significantly reducing noise and eliminating quality defects such as surface dents and scratches.

[0024] Modular support platform, multi-functional, with easily replaceable modules: a) Elastic strip arrays are suitable for large-size, thin-walled exterior parts, providing a continuous elastic plane; b) The cross groove module is suitable for small and medium-sized stamping parts that require precise positioning at the four corners. The groove spacing can be switched between 30 / 40 / 50mm, and it is compatible with length and width combinations of 100–400mm. It also reserves a 2mm gap for sheet separation, which is convenient for the robot's magnetic hand / vacuum suction cup to directly grasp the parts, eliminating the need for the shaking and blowing process. c) Drainage components are suitable for parts with windows or parts containing liquid / slag. The central drainage hole allows for immediate chip and water discharge, while the surrounding plane supports the parts, preventing the window area from being suspended and deformed, and saving pallet material. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of an unloading auxiliary device for a sheet metal parts transport vehicle proposed in this invention; Figure 2 This is a schematic diagram of the drive mechanism of an unloading auxiliary device for a sheet metal transport vehicle proposed in this invention; Figure 3 This is a schematic diagram of the slide block and slide rail structure of an unloading auxiliary device for a sheet metal transport vehicle proposed in this invention; Figure 4 This is a schematic diagram of the slide structure of an unloading auxiliary device for a sheet metal transport vehicle proposed in this invention; Figure 5 This is a schematic diagram of the receiving unit structure of an unloading auxiliary device for a sheet metal transport vehicle proposed in this invention; Figure 6 This is a schematic diagram of the push-pull handle and receiving module structure of an unloading auxiliary device for a sheet metal parts transport vehicle proposed in this invention; Figure 7 This is a schematic diagram of the grid frame and cross groove module structure of an unloading auxiliary device for a sheet metal transport vehicle proposed in this invention. Figure 8This is a schematic diagram of the perforated part structure of an unloading auxiliary device for a sheet metal transport vehicle proposed in this invention.

[0026] In the diagram: 1. Unloading unit; 11. Drive mechanism; 111. Support column; 112. Top frame; 113. Vertical plate; 114. Guide rail; 115. Sliding sleeve; 12. Sliding seat; 13. Slide rail; 131. Straight groove; 132. Mounting ear; 133. Trumpet mouth; 2. Receiving unit; 21. Base; 22. Push-pull handle; 23. Receiving module; 231. Rigid pallet; 232. Elastic strip; 233. Grid frame; 234. Cross groove module; 235. Perforated part. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Reference Figures 1-8 Example 1: An unloading auxiliary device for a sheet metal transport vehicle includes an unloading unit 1 and a receiving unit 2. The receiving unit 2, which can be horizontally pushed and pulled, is installed in the area of ​​the base 21 covered by the slide rail 13 directly below the outlet of the unloading unit 1 and the vertical projection downward along the center line L of the slide rail. The unloading unit 1 includes a drive mechanism 11 and a slide seat 12 slidably installed on the front end face of the drive mechanism 11. The slide rail 13 is fixedly installed in front of the slide seat 12.

[0029] The drive mechanism 11 includes a support column 111 and a top frame 112 installed on the top of the four sets of support columns 111. A vertical plate 113 is vertically installed on the top of the top frame 112. A guide rail 114 is installed at the center of the vertical plate 113. A sliding sleeve 115 is slidably sleeved on the outer ring of the guide rail 114. The sliding sleeve 115 can reciprocate and move up and down along the guide rail 114. Four support columns 111 and top frame 112 form a rigid gantry frame, providing stable support for the entire unloading auxiliary device. The vertically set guide rail 114 serves as a linear guide rail, constraining the sliding sleeve 115 to move only up and down, ensuring the repeatability of lifting and lowering. An external motor directly drives the sliding sleeve 115, and the sliding sleeve 115 transmits the lifting motion to the slide rail 13 through the slide block 12, realizing a single-stage transmission from the external motor to the sliding sleeve 115, the slide block 12 and the slide rail 13, with the shortest structure and the smallest error. The external motor can be started and stopped at any position, ensuring that the outlet of the slide 13 and the receiving surface of the receiving module 23 always maintain the optimal height difference, avoiding impact or jamming. When the model of the transport vehicle or the height of the sheet metal parts changes, no mechanical disassembly is required; height matching can be completed simply by jogging the motor, thus shortening the changeover time.

[0030] In embodiment 2, the slide 13 includes a straight groove 131 and mounting ears 132 installed on both sides of the lower end face of the straight groove 131. The top of the straight groove 131 is inclined outward to form a flared opening 133. The top flared opening 133 flares outward, while the lower straight groove 131 tapers inward, forming a continuous slide from the flared opening to the straight groove, smoothly guiding the sheet metal parts from higher positions into its own cavity. Workers only need to push the parts into the flared opening 133, and the subsequent sliding, positioning, and stacking are all completed automatically, reducing the handling effort; the two walls of the inner cavity of the straight groove 131 are parallel and the width is consistent with the rigid pallet 231, so that the sheet metal parts maintain their posture during the sliding process, avoiding rotation or jamming; When two sheet metal parts of the same specification need to be pushed back to back into the flared opening 133 at the same time, the natural friction difference in the groove and the shift of the center of gravity are used to make the two pieces slide down at different times; the exit automatically forms a "double-layer stack" shape, saving the need for manual stacking once.

[0031] The continuous slide rail and buffer design prevent parts from falling freely or colliding with each other, reducing the surface scratch rate by more than 80%; the slide rail length and inclination angle are fixed, the sliding time of each part is consistent, and the cycle time error of the entire production line is <±1s. The inner wall of the straight groove 131 has a certain friction and a slight inclination, which can reduce the sliding speed of the sheet metal parts under no-power conditions and reduce the impact on the receiving module 23.

[0032] The lower outlet is directly opposite the receiving center of the receiving module 23, ensuring that the sheet metal parts fall onto the receiving module 23 in the same position and in the same posture each time, providing a consistent benchmark for subsequent handling or stacking. The entire assembly is rigidly connected to the slide block 12 via mounting ears 132, and can slide as a whole with the slide block 12 to achieve rapid alignment with the receiving modules 23 at different workstations.

[0033] In embodiment 3, the receiving unit 2 includes a base 21 and a push-pull handle 22 installed at the edge of the upper surface of the base 21. A receiving module 23 is installed at one end of the push-pull handle 22, and the bottom of the receiving module 23 is placed on the upper surface of the base 21.

[0034] Example 4: The receiving module 23 includes a rigid tray 231 and two sets of elastic strips 232 arranged and installed in the inner cavity of the rigid tray 231; The falling sheet metal parts first land on the low-friction surface of the elastic strip 232, instantly absorbing the impact kinetic energy, and then fall as a whole onto the rigid base plate of the rigid tray 231, forming a "soft-hard" secondary buffer.

[0035] Two sets of elastic strips 232 are arranged at the same height to form a coplanar support, preventing the sheet from warping or slipping due to local tilting. The surface hardness of the elastic strips 232 is lower than that of sheet metal parts, avoiding direct metal-to-metal collisions, and reducing noise and scratches simultaneously. When worn or needing replacement, the elastic strip 232 can be pulled out and replaced individually without disassembling the entire rigid pallet 231, with maintenance time <1 minute; the top surfaces of all elastic strips 232 together form a "virtual plane", providing a unified height reference for subsequent robot gripping or manual palletizing.

[0036] The planar array combination of rigid tray 231 and elastic strip 232 is best suited for large-sized, thin-walled sheet metal parts that require "zero scratches" on their appearance. Typical examples include refrigerator side panels and washing machine outer shells, which can have an area of ​​0.5-1m². 2 Powder-coated pre-painted sheets with a thickness of 0.4-0.6mm. These parts are large in area and light in weight, and are prone to dents or coating scratches due to localized point contact during drop; the continuous elastic plane provided by the elastic strip 232 can reduce the impact pressure to 0.02N / mm. 2 Meanwhile, noise is absorbed by the elastomer.

[0037] Example 5: The receiving module 23 also includes a grid frame 233 that can replace the rigid tray 231. Two sets of cross groove modules 234 are arranged and installed in the inner cavity of the grid frame 233. The upper end face of the cross groove module 234 is set as a cross groove. The cross-groove grid of the grid frame 233 and the cross-groove module 234 is designed for small to medium-sized stamped parts that require precise edge positioning and are subsequently directly grasped by robots, such as reinforcing brackets inside car doors, A-pillar reinforcing plates, and battery pack cooling plates. These parts are typically regular in shape, weigh 2-8kg, and require a stacking corner alignment error of less than 0.5mm, so that the robot can grasp multiple parts at once and place them into the welding fixture. The cross-groove provides four-sided limiting, naturally holding the parts in fixed grids. The groove spacing can be quickly switched at 30 / 40 / 50mm, compatible with length and width combinations ranging from 100-400mm. The 2mm gap left in the groove allows for direct separation by magnetic hands or vacuum suction cups, eliminating the traditional shaking and blowing process. When changing models, only the module needs to be changed, not the whole, making it more suitable for the needs of high-variety, high-cycle automotive production lines.

[0038] In embodiment 6, the receiving module 23 also includes a perforated part 235 that can replace the cross groove module 234. The center of the perforated part 235 is downwardly through, and the bottom of the perforated part 235 is attached to the bottom of the inner cavity wall of the grid frame 233. After removing the cross-groove module 234 and replacing it with the drain hole component 235, the inner cavity of the grid frame 233 becomes a hollow tray with a "central drain hole + peripheral plane". It is suitable for sheet metal parts that require immediate chip removal and drainage, such as parts with slag and coolant residue after laser cutting. When it falls, the residual liquid can be directly recycled through the central through hole of the drain hole component 235.

[0039] It is also suitable for stamped parts that require partial blanking in the middle, such as electrical mounting plates with large windows and wheel hub covers. The window is aligned with the drain hole, and the parts are still supported by the edge of the drain hole part 235. This saves tray material and prevents the window area from deforming due to suspension.

[0040] Workers simultaneously push single or back-to-back sheet metal parts of the same specification into the flared opening 133, automatically centering them and correcting their posture to prevent rotation.

[0041] The opening width of the rigid tray 231 is the same as the opening width of the straight groove 131. The upper surface of the rigid tray 231 coincides with the horizontal projection of the lower outlet of the straight groove 131 at the end of the stroke of the horizontal push-pull handle unit 22. The side of the tray and the outer wall of the straight groove are 2–5 mm apart, forming a zero-interference docking.

[0042] In summary: the top flared opening 133 flares outward, while the lower straight groove 131 tapers inward, forming a continuous slide from the flared opening to the straight groove, smoothly guiding the sheet metal parts from higher positions into their own inner cavity. Workers only need to push the parts into the flared opening 133; subsequent sliding, positioning, and stacking are all completed automatically, reducing handling effort. The inner walls of the straight groove 131 are parallel and their width matches that of the rigid pallet 231, ensuring the sheet metal parts maintain their posture during sliding and preventing rotation or jamming. When two sheet metal parts of the same specification need to be pushed back to back into the flared opening 133 at the same time, the natural friction difference in the groove and the shift of the center of gravity are used to make the two pieces slide down at different times; the exit automatically forms a "double-layer stack" shape, saving the need for manual stacking once.

[0043] The continuous slide rail and buffer design prevent parts from falling freely or colliding with each other, reducing the surface scratch rate by more than 80%; the slide rail length and inclination angle are fixed, the sliding time of each part is consistent, and the cycle time error of the entire production line is <±1s. The inner wall of the straight groove 131 has a certain friction and a slight inclination, which can reduce the sliding speed of the sheet metal parts under no-power conditions and reduce the impact on the receiving module 23. The buffer design refers to the following: the inner wall of the straight groove 131 is attached with a layer of polyurethane friction-reducing pad with a thickness of 1–3 mm and a hardness of 30–50 Shore A, and its surface roughness Ra≤1.6μm; this elastic pad and the subsequent elastic strip 232 together form a two-stage continuous buffer, so that the sheet metal parts complete the first deceleration in the slide section and the final speed when leaving the exit is ≤0.3m / s, thereby avoiding free fall or mutual collision.

[0044] The lower outlet of the straight groove 131 of the slide 13 is directly opposite the receiving center of the receiving module 23, and the horizontal projection center deviation between the two is ≤1 mm, ensuring that the sheet metal parts fall onto the receiving module 23 in the same position and in the same posture each time, providing a consistent benchmark for subsequent handling or stacking.

[0045] The whole assembly is rigidly connected to the slide block 12 via the straight groove 131, and can slide as a whole with the slide block 12 to achieve quick alignment with the receiving modules 23 of different workstations.

[0046] Four support columns 111 and top frame 112 form a rigid gantry frame, providing stable support for the entire unloading auxiliary device. The vertically set guide rail 114 serves as a linear guide rail, constraining the sliding sleeve 115 to move only up and down, ensuring the repeatability of lifting and lowering. An external motor directly drives the sliding sleeve 115, and the sliding sleeve 115 transmits the lifting motion to the slide rail 13 through the slide block 12, realizing a single-stage transmission from the external motor to the sliding sleeve 115, the slide block 12 and the slide rail 13, with the shortest structure and the smallest error. The external motor can be started and stopped at any position, ensuring that the outlet of the slide 13 and the receiving surface of the receiving module 23 always maintain the optimal height difference, avoiding impact or jamming. When the model of the transport vehicle or the height of the sheet metal parts changes, no mechanical disassembly is required; height matching can be completed simply by jogging the motor, thus shortening the changeover time.

[0047] The push-pull rod 224 can move laterally back and forth into the inner cavity of the guide beam 221. The operator can hold the main handle 222 and the auxiliary handle 223 and push them to move the receiving module 23 on the upper surface of the base 21.

[0048] The inner cavity of the guide beam 221 is a precision straight groove, which forms a closed guide for the push-pull rod 224 to prevent the cantilever from sagging. The front end face of the guide beam 221 has an elongated hole, which allows the push-pull rod 224 to extend while restricting its rotational freedom, ensuring that there is no sway during the push-pull process.

[0049] The main handle 222 is at the same height as an adult's elbow, which is ergonomic. The auxiliary handle 223 can be used with both hands at the same time, or it can be pushed with one hand in a narrow space. One end of the push-pull rod 224 is hinged to the receiving module 23, and the other end is fixed to the handle, which directly converts human power into the horizontal movement of the receiving module 23.

[0050] The falling sheet metal parts first land on the low-friction surface of the elastic strip 232, instantly absorbing the impact kinetic energy, and then fall as a whole onto the rigid base plate of the rigid tray 231, forming a "soft-hard" secondary buffer.

[0051] Two sets of elastic strips 232 are arranged at the same height to form a coplanar support, preventing the sheet from warping or slipping due to local tilting. The surface hardness of the elastic strips 232 is lower than that of sheet metal parts, avoiding direct metal-to-metal collisions, and reducing noise and scratches simultaneously. When worn or needing replacement, the elastic strip 232 can be pulled out and replaced individually without disassembling the entire rigid pallet 231, with maintenance time <1 minute; the top surfaces of all elastic strips 232 together form a "virtual plane", providing a unified height reference for subsequent robot gripping or manual palletizing.

[0052] The planar array combination of rigid tray 231 and elastic strip 232 is best suited for large-sized, thin-walled sheet metal parts that require "zero scratches" on their appearance. Typical examples include refrigerator side panels and washing machine outer shells, which can have an area of ​​0.5-1m². 2 Powder-coated pre-painted sheets with a thickness of 0.4-0.6mm. These parts are large in area and light in weight, and are prone to dents or coating scratches due to localized point contact during drop; the continuous elastic plane provided by the elastic strip 232 can reduce the impact pressure to 0.02N / mm. 2 Meanwhile, noise is absorbed by the elastomer.

[0053] The cross-groove grid of the grid frame 233 and the cross-groove module 234 is designed for small to medium-sized stamped parts that require precise edge positioning and are subsequently directly grasped by robots, such as reinforcing brackets inside car doors, A-pillar reinforcing plates, and battery pack cooling plates. These parts are typically regular in shape, weigh 2-8kg, and require a stacking corner alignment error of less than 0.5mm, so that the robot can grasp multiple parts at once and place them into the welding fixture. The cross-groove provides four-sided limiting, naturally holding the parts in fixed grids. The groove spacing can be quickly switched at 30 / 40 / 50mm, compatible with length and width combinations ranging from 100-400mm. The 2mm gap left in the groove allows for direct separation by magnetic hands or vacuum suction cups, eliminating the traditional shaking and blowing process. When changing models, only the module needs to be changed, not the whole, making it more suitable for the needs of high-variety, high-cycle automotive production lines.

[0054] After removing the cross-groove module 234 and replacing it with the drain hole component 235, the inner cavity of the grid frame 233 becomes a hollow tray with a "central drain hole + peripheral plane". It is suitable for sheet metal parts that require immediate chip removal and drainage, such as parts with slag and coolant residue after laser cutting. When it falls, the residual liquid can be directly recycled through the central through hole of the drain hole component 235.

[0055] It is also suitable for stamping parts that require partial blanking in the middle, such as electrical mounting plates with large windows and wheel hub covers. The window is aligned with the hole, and the parts are still supported by the edge of the hole part 235, which saves tray material and prevents the window area from deforming due to suspension. Workers simultaneously push single or back-to-back sheet metal parts of the same specification into the flare opening 133, which automatically centers the parts and corrects their posture to prevent rotation. The overall working steps of the equipment are as follows: the parts slide down the straight groove 131, the fixed inclination angle of the groove wall and the controllable friction make the speed constant and the cycle error reduced; when two parts are put in at the same time, they are naturally staggered by 0.3s by the friction difference and the shift of the center of gravity, and the exit is pre-arranged into a "double layer stack" stack. An external motor drives the sliding sleeve 115 to rise and fall on the guide rail 114, which in turn moves the slide block 12 and the slide rail 13 as a whole, so that the slide rail outlet and the lower bearing surface maintain the optimal drop, usually 5-15mm, to eliminate impact dents. The worker holds the main handle 222, which drives the auxiliary handle 223 to push the push-pull rod 224. The inner cavity of the guide beam 221 guides the worker in a straight line, quickly moving the receiving module 23 to directly below the outlet. Releasing the hand locks the device, ensuring that the center of the landing point coincides with the center of the outlet with an error of less than 1mm.

[0056] Choose between three options: receiving, buffering, or support, and switch according to the part type; a) Large-size thin-walled exterior components: refrigerator side panels, washing machine outer shells; →Elastically arranged with rigid tray 231 and elastic strip 232: The continuous elastic surface reduces the impact pressure to 0.02 N / mm. 2 Noise level -15dB, surface scratch rate ↓80%.

[0057] b) For small and medium-sized stamped parts such as door reinforcement brackets and battery pack cooling plates that require precise positioning at the four corners and direct robot gripping, a grid frame 233 + cross groove module 234 cross groove grid is adopted: the groove is limited on all four sides, reducing the alignment error of the four corners of the stack.

[0058] c) Laser-cut window panels, hub caps, and post-weld hot-dip parts with windows or liquid / slag, using grid frame 233 + perforated part 235 center perforation: the window area is suspended and supported by the surrounding plane, preventing deformation and saving tray material.

[0059] Regardless of the receiving mode, all elastic bodies or grid top surfaces together form a "virtual plane". When stacking by robots or manually, this plane can be used as the zero point in the Z direction without the need to remeasure the height.

[0060] The above describes the entire working principle of this invention.

[0061] In this invention, the installation, connection or setting methods of all the components mentioned above are common mechanical methods, and the specific structure, model and coefficient index of all the components are their own technologies. As long as they can achieve their beneficial effects, they can be implemented, so they will not be described in detail.

[0062] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

[0063] In this invention, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside, and vertical and horizontal" in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term. At the same time, numerals such as "first," "second," and "third" do not represent specific quantities or orders, but are merely used to distinguish names. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A sheet metal part transport vehicle unloading auxiliary device, comprising an unloading unit (1) and a receiving unit (2), the front end position of the unloading unit (1) is provided with the receiving unit (2), characterized in that, The unloading unit (1) comprises a driving mechanism (11) and a sliding seat (12) slidingly installed on the front end surface of the driving mechanism (11), and a slide (13) is fixedly installed in front of the sliding seat (12); The receiving unit (2) comprises a base (21) and a push-pull handle (22) installed on the upper end surface edge position of the base (21), one end of the push-pull handle (22) is provided with a receiving module (23), and the bottom of the receiving module (23) is placed on the upper end surface of the base (21); The receiving module (23) comprises a rigid tray (231) and two groups of elastic strips (232) arranged and installed in the inner cavity of the rigid tray (231).

2. The unloading assisting device of the sheet metal part transport vehicle according to claim 1, characterized by The driving mechanism (11) comprises a supporting column (111) and a top frame (112) installed on the top of the four supporting columns (111), a vertical plate (113) is vertically arranged on the top of the top frame (112), a guide rail (114) is installed at the center position of the vertical plate (113), a sliding sleeve (115) is slidingly sleeved on the outer ring of the guide rail (114), and the sliding sleeve (115) can reciprocatingly move up and down along the guide rail (114) as the path.

3. The unloading assisting device of the sheet metal part transport vehicle according to claim 1, characterized by The slide (13) comprises a straight groove (131) and mounting ears (132) installed on both sides of the lower end surface of the straight groove (131), and trumpet mouths (133) are outwardly and obliquely arranged on the top positions of the straight groove (131).

4. The unloading assisting device of the sheet metal part transport vehicle according to claim 3, characterized by The receiving module (23) further comprises a leakage part (235) of a replaceable cross groove module (234), the center position of the leakage part (235) is downwardly penetrated, and the bottom of the leakage part (235) is attached to the inner cavity wall bottom of the grid frame (233).

5. The unloading assisting device of the sheet metal part transport vehicle according to claim 4, characterized by The opening width of the rigid tray (231) is consistent with the opening width of the straight groove (131), and the movement track of the rigid tray (231) is in contact with the opening position of the straight groove (131).

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