An improved tray transfer elevator

Abstract

This utility model relates to the technical field of transplanting elevators, and in particular to an improved material tray transplanting elevator, comprising a lifting frame, a horizontal conveying device, a lifting device, and a gripping mechanism. The lifting device includes a lifting slide, a lifting power unit, and a telescopic device. The lifting power unit includes a lifting motor, a drive gear, a driven gear, and a lifting rack. The lifting rack is fixed to the lifting frame. The drive gear is rotatably connected to the lifting slide and engages with the power output end of the lifting motor. The driven gear is coaxially fixed to the drive gear and meshes with the lifting rack. The gripping mechanism is used to hook the material tray and extend and retract with the telescopic device. In summary, the transfer efficiency is improved through "horizontal conveying and temporary storage + parallel operation," the lifting accuracy is improved through "four sets of guide rails + helical gear transmission at both ends," and the lateral space occupation is shortened through "double-layer guide rail nesting." This solves the pain points of low efficiency, poor accuracy, and weak space adaptability of existing equipment, and is suitable for the high-yield requirements of the spraying production line.

Description

Technical Field

[0001] This utility model relates to the technical field of transplanting elevators, and in particular to an improved tray transplanting elevator. Background Technology

[0002] In the spray painting process, a hoist is needed to transfer the workpiece-carrying tray from the lower spray painting line to the upper baking line. The existing hoist operation typically involves the following steps: after the tray flows into the hoist, the hoist rises and delivers the tray to the upper line, then lowers before the next tray can flow in. This results in a long waiting time for each tray, severely restricting production line efficiency. Furthermore, existing hoists often use chains as the drive mechanism, which tend to stretch and lengthen over time, leading to decreased tray positioning accuracy and malfunctions such as tray misalignment and jamming, increasing equipment maintenance costs and the risk of production interruptions.

[0003] To address the aforementioned issues, there is an urgent need in this field for a material tray transfer device that can shorten waiting time and improve operational accuracy, in order to meet the efficient and stable transfer requirements of the spraying production line. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] This utility model provides an improved tray transfer and lifting machine, comprising: Lifting frame; A translational conveying device, fixed to the lower part of the lifting frame, is used to receive and temporarily store material trays from the spraying line; The lifting device is connected to the lifting frame and is used to drive the gripping mechanism to grab the material tray from the translational conveying device and lift the material tray to the upper line position. The lifting device includes a lifting slide, a lifting power unit, and a telescopic device; The lifting slide is slidably connected to the lifting frame; The lifting power unit includes a lifting motor, a driving gear, a driven gear, and a lifting rack. The lifting rack is fixed to the lifting frame. The driving gear is rotatably connected to the lifting slide and is in transmission cooperation with the power output end of the lifting motor. The driven gear is coaxially fixed to the driving gear and meshes with the lifting rack. The lifting motor drives the driving gear and the driven gear to rotate synchronously, so as to drive the lifting slide to rise and fall along the lifting rack. The telescopic device includes a telescopic cylinder and a telescopic platform. The telescopic platform is slidably connected to the lifting slide, and the telescopic cylinder is fixed to the lifting slide. Its piston rod is drivenly connected to the telescopic platform to drive the telescopic platform to extend and retract along the lifting slide. A gripping mechanism is provided on the telescopic platform. The gripping mechanism is a hook-type structure used to grab the material tray from the translational conveyor and extend and retract with the telescopic platform to send the material tray into the upper line.

[0006] Furthermore, the lifting motor is configured as a servo motor with a braking function.

[0007] Furthermore, the lifting frame is also equipped with a rigid limiting component to limit the lifting range of the lifting slide.

[0008] Furthermore, the lifting device also includes a vertical guide rail and a vertical slider; the vertical guide rail is fixed to the lifting frame, the vertical slider is fixed to the lifting slide, and the vertical guide rail and the vertical slider slide together to form a linear guide rail module, which is used to assist the lifting slide in lifting along the lifting frame.

[0009] Furthermore, the lifting power unit also includes a transmission rod; the transmission rod is rotatably connected to the lifting slide, and the driving gear is fixedly connected to the transmission rod; the driven gear includes a first gear and a second gear, which are respectively fixedly connected to both ends of the transmission rod; the lifting rack includes a first rack and a second rack, which are respectively fixedly connected to the lifting frame at positions corresponding to the first gear and the second gear; the first gear meshes with the first rack, and the second gear meshes with the second rack; when the driving gear rotates, it drives the first gear and the second gear to rotate synchronously through the transmission rod, thereby driving the lifting slide to rise and fall from both ends.

[0010] Furthermore, the telescopic device also includes a first linear guide rail module and a second linear guide rail module. The first linear guide rail module includes a first slider and a first guide rail, and the second linear guide rail module includes a second slider and a second guide rail. The first slider is fixed to the bottom of the lifting slide, and the first guide rail is slidably engaged with the first slider. The second slider is fixed to the bottom of the first guide rail, and the second guide rail is slidably engaged with the second slider. The second guide rail is also fixed to the top of the telescopic platform. The first linear guide rail module and the second linear guide rail module form a double-layer sliding mechanism to reduce the space occupied by the telescopic device.

[0011] Furthermore: the gripping mechanism includes a gripping cylinder, a gripping guide rail, a gripping slider, a gripping bracket, and a gripping hook; the gripping cylinder and the gripping guide rail are both fixedly connected to the bottom of the telescopic platform; the gripping slider is fixedly connected to the top of the gripping bracket, and the gripping bracket forms a sliding connection with the telescopic platform through the sliding engagement of the gripping slider and the gripping guide rail; one end of the gripping hook is fixedly connected to the bottom of the gripping bracket, and the other end is provided with a claw for hooking the protruding post of the material tray.

[0012] Compared with the prior art, the beneficial effects of this utility model are: ① Efficiency Improvement: By utilizing the temporary storage function of the translation conveyor, the parallel operation of "transferring the previous tray" and "receiving the next tray" can be achieved. There is no need to wait for the elevator to descend before the material flows into the new tray. The waiting time for transferring a single tray is shortened, and the overall production line efficiency is improved by about 30%. ②Stable precision: The lifting transmission structure with gear and rack and linear guide rail is used to replace the traditional chain drive, avoiding the problem of stretching of transmission components caused by long-term operation. The lifting and positioning accuracy is higher. At the same time, the hook-claw gripping mechanism ensures the stability of the material tray during the transfer process and reduces the material tray docking deviation and jamming failure. ③Safe and reliable: The lifting motor adopts a servo motor with brake, which, together with the hard limit component on the lifting frame, effectively prevents the equipment from falling suddenly when the power is off and from overtravel, thus improving the safety of equipment operation; ④ Good spatial adaptability: The telescopic platform adopts a double-layer sliding structure, which reduces the space occupation in the non-working state while ensuring the telescopic stroke, and adapts to the compact layout requirements of the painting workshop.

[0013] Therefore, this improved material tray transfer elevator improves the transfer efficiency by more than 30% and the hourly transfer volume exceeds 250 pieces through "horizontal transfer, temporary storage and parallel operation". It achieves a lifting accuracy of ±0.2mm with "four sets of guide rails and helical gear transmission at both ends" and extends the maintenance cycle by 2 times. By "double-layer guide rail nesting", it reduces the horizontal space occupation by 50%. It comprehensively solves the pain points of low efficiency, poor accuracy and weak space adaptability of existing equipment and adapts to the high-production needs of the spraying production line.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a structural schematic diagram of the support column and telescopic device of this utility model; Figure 3 This is a structural schematic diagram of the lifting slide and lifting power unit of this utility model; Figure 4 This is a structural schematic diagram of the telescopic platform and telescopic cylinder of this utility model; Figure 5 This is a schematic diagram of the telescopic device of this utility model in the extended state; Figure 6 This is a schematic diagram of the telescopic device of this utility model in the retracted state.

[0017] The reference numerals and names in the figure are as follows: 10 Lifting frame; 11 Support column; 12 Hard limit component; 13 Horizontal conveying device; 20 Lifting device; 21 Lifting slide; 22 Vertical guide rail; 23 Vertical slider; 30 Lifting power unit; 31 Transmission rod; 32 Lifting motor; 33 Driving gear; 34 Driven gear; 35 First gear; 36 Second gear; 37 Lifting rack; 38 First rack; 39 Second rack; 40 Telescopic device; 41 Telescopic cylinder; 42 Telescopic platform; 43 First slider; 44 First guide rail; 45 Second slider; 46 Second guide rail; 50 Gripping mechanism; 51 Gripping cylinder; 52 Gripping guide rail; 53 Gripping slider; 54 Gripping bracket; 55 Hook; 60 Material tray; 61 Protruding column. Detailed Implementation

[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Please see Figures 1 to 6 In this embodiment of the present invention, the improved material tray 60 transplanting and lifting machine provided by the present invention includes a core structure comprising a lifting frame 10, a translational conveying device 13, a lifting device 20, and a gripping mechanism 50. The specific structure, assembly, and operational relationship of each part are as follows: I. Overall structural frame: The lifting frame 10 serves as the installation foundation for the entire equipment. It adopts the overall shape of a gantry frame to support core components such as the horizontal conveying device 13 and the lifting device 20. Its structural strength must be compatible with the total weight of the material tray 60 and the workpiece to ensure the stability of the equipment during operation.

[0020] II. Horizontal Conveying Device 13: The horizontal conveying device 13 is fixed to the lower part of the lifting frame 10. Specifically, it can adopt a roller conveyor structure (or a belt conveyor, chain conveyor, etc., depending on actual needs). Its main function is to receive the material trays 60 from the lower spraying line and temporarily store them. Compared with the traditional lifting machine method of "waiting for the lifting machine to descend before receiving materials", this horizontal conveying device 13 can simultaneously receive the next material tray 60 while the lifting device is transferring the previous material tray 60 upward, realizing the parallel operation of "transfer" and "receiving", fundamentally shortening the waiting time of the material trays 60.

[0021] III. Lifting Device 20: The lifting device 20 is connected to the lifting frame 10 and is the core component for realizing the lifting and transfer of the material tray 60. It includes a lifting slide 21, a lifting power unit 30, and a telescopic device 40. The specific design of each sub-component is as follows: 1. Lifting slide 21: It is slidably connected to the lifting frame 10 via linear guide rails. The linear guide rails are arranged along the height direction of the lifting frame 10, and preferably at least two sets are provided (such as symmetrical arrangement in front and behind or left and right) to ensure the trajectory accuracy of the lifting slide 21 when it rises and falls along the lifting frame 10, and to avoid deviation or shaking during operation.

[0022] 2. Lifting power unit 30: As the power source for the lifting slide 21, it includes a lifting motor 32, a drive gear 33, a driven gear 34, and a lifting rack 37. The lifting rack 37 is fixed along the height direction of the lifting frame 10, with its tooth surface facing the driven gear 34. The driving gear 33 is connected to the lifting slide 21 through rotating components such as bearings, and is in transmission cooperation with the power output end of the lifting motor 32 (specifically, the driving gear 33 can be directly connected to the motor shaft, or connected through intermediate transmission components such as couplings, gearboxes, and reduction gears to adapt to different lifting speed and torque requirements). The driven gear 34 is coaxially fixed to the driving gear 33, and its tooth surface meshes with the tooth surface of the lifting rack 37. When the lifting motor 32 starts, the driving gear 33 rotates synchronously with the power output end of the motor, and the coaxially fixed driven gear 34 rotates synchronously as well. Through the meshing transmission between the driven gear 34 and the lifting rack 37, the lifting slide 21 is driven to rise and fall stably along the length direction of the lifting rack 37, avoiding the problem of easy stretching of traditional chain drives and improving the lifting positioning accuracy.

[0023] It should be noted that the lifting motor 32 is preferably a servo motor with a braking function. When the equipment loses power or stops abnormally, the braking function can immediately lock the motor output to prevent the lifting slide 21 from suddenly falling with the material tray 60, thereby improving the safety of equipment operation. At the same time, the lifting frame 10 is also equipped with a hard limit component 12 (which can be a metal block, limit switch, etc.), which is arranged at the highest and lowest stroke positions of the lifting slide 21 to limit the lifting range of the lifting slide 21 and prevent the lifting slide 21 from running beyond its range due to control errors, thereby further ensuring the safety of the equipment and the material tray 60.

[0024] 3. Telescopic Device 40: Used to feed the tray 60, which has been raised to the position of the upper line body, into the upper baking line. It includes a telescopic cylinder 41 and a telescopic platform 42. The telescopic platform 42 is slidably connected to the lifting slide 21 via a linear guide rail, which is arranged horizontally (consistent with the feeding direction of the upper line body). The cylinder body of the telescopic cylinder 41 is fixed on the lifting slide 21, and the free end of its piston rod is connected to the telescopic platform 42 via a flange, connecting block, or other components. When the lifting slide 21 raises the tray 60 to a position flush with the upper line body, the piston rod of the telescopic cylinder 41 extends, pushing the telescopic platform 42 along the linear guide rail toward the upper line body. When the tray 60 is fully within the receiving range of the upper line body, the piston rod of the telescopic cylinder 41 retracts, causing the telescopic platform 42 to reset and await the next transfer.

[0025] In addition, the telescopic platform 42 is preferably designed as a double-layer sliding structure. Through the nesting and cooperation of the two sliding frames, the overall space occupied by the telescopic device 40 in the non-working state is greatly reduced while ensuring the telescopic stroke, so that the equipment can adapt to the compact layout requirements of the painting workshop.

[0026] IV. Gripping Mechanism 50: The gripping mechanism 50 is mounted on the telescopic platform 42. Its structure is adapted to the shape of the material tray 60. Specifically, it adopts a hook-type structure. The number of hooks can be set to at least two according to the size and weight of the material tray 60 (such as symmetrically arranged on both sides of the telescopic platform 42). The shape of the hooks is designed as "L" or "hook", and the height of the hooks can be adjusted with the lifting slide 21. When the lifting slide 21 descends to its lowest position, the hooks descend synchronously with the telescopic platform 42, hooking the material tray 60 from both ends of the translation conveyor 13 to achieve a stable gripping of the material tray 60. Subsequently, the hooks rise synchronously with the lifting slide 21 to the upper line position, and with the extension of the telescopic platform 42, the material tray 60 is sent to the upper line. After the material tray 60 is taken away by the upper line, the hooks retract with the telescopic platform 42 and descend with the lifting slide 21, ready to grip the next material tray 60 temporarily stored on the translation conveyor 13.

[0027] The specific operating procedure of this 60mm material tray transplanting elevator is as follows: 1. In the initial state, the lifting slide 21 is in the lowest position, the telescopic platform 42 is in the retracted state, and the claw of the gripping mechanism 50 is in the gripping position. 2. The first tray 60 of the lower spraying line flows into the translation conveyor 13, which moves the tray 60 to directly below the gripping mechanism 50 to complete the positioning; 3. The lifting power unit 30 is started, and the lifting motor 32 drives the driving gear 33 and the driven gear 34 to rotate synchronously, which drives the lifting slide 21 to rise along the linear guide rail. The hook of the gripping mechanism 50 rises with the lifting slide 21 and hooks the material tray 60. Then the lifting slide 21 continues to rise to a position that is flush with the upper line. 4. When the telescopic cylinder 41 is activated, the piston rod extends, driving the telescopic platform 42 to move towards the upper line. The material tray 60 hooked by the gripping mechanism 50 moves synchronously with the telescopic platform 42 until the material tray 60 is completely within the receiving range of the upper line, and the upper line takes away the material tray 60. 5. In steps 3-4, the translational conveyor 13 synchronously receives and temporarily stores the second material tray 60 of the lower spraying line, without waiting for the lifting slide 21 to descend; 6. After the material tray 60 is taken away, the piston rod of the telescopic cylinder 41 retracts, driving the telescopic platform 42 to reset; then the lifting power unit 30 starts in reverse, the lifting slide 21 descends to the lowest position, the gripping mechanism 50 hooks the second material tray 60 temporarily stored on the translation conveyor 13, and repeats the actions of steps 3-5 to realize the continuous transfer of the material tray 60.

[0028] Through the above process, the transfer cycle of a single material tray of this elevator is shortened by about 30% compared with traditional elevators, which greatly improves the overall operating efficiency of the spraying production line.

[0029] like Figures 1 to 3 As shown, preferably, in order to further improve the lifting stability of the lifting slide 21, improve the lifting trajectory accuracy of the lifting slide 21 and avoid its deviation and shaking, the present invention provides the following preferred embodiment: The lifting frame 10 is provided with two sets of symmetrically arranged support components along the length direction of the translation conveying device 13 (i.e., the axis direction of the roller, perpendicular to the inflow and outflow direction of the material tray 60), and the two sets of support components are respectively located at both ends of the translation conveying device 13 (i.e., the outer sides of both ends of the roller); the two ends of the roller of the translation conveying device 13 are respectively fixed to the two sets of support components by bearing seats to ensure that the roller axis is horizontal, thereby ensuring that the material tray 60 is smoothly conveyed along the radial direction (inflow and outflow direction) of the roller.

[0030] Each set of support components includes two vertically arranged support columns 11. The two support columns 11 are arranged at intervals along the inflow and outflow direction of the material tray 60 (i.e., the radial direction of the roller). The two sets of support components form a total of four support columns 11. The four support columns 11 are distributed in a rectangle (the long side is parallel to the roller axis and the short side is parallel to the conveying direction of the material tray 60). This not only provides stable support for the roller, but also forms symmetrical guidance for the lifting slide 21 through the subsequent four sets of linear guide rail modules, further improving the lifting accuracy.

[0031] To match the support structure of the four support columns 11, in this embodiment, the number of linear guide rail modules (composed of vertical guide rails 22 and vertical sliders 23) is set to four sets, and the specific arrangement is as follows: the four sets of vertical guide rails 22 are fixed to the inner sidewalls of the four support columns 11 by guide rail seats, bolts and other connecting parts. The length direction of the vertical guide rails 22 is consistent with the vertical direction of the support columns 11, and the installation height and verticality of the four sets of vertical guide rails 22 are consistent. The four sets of vertical sliders 23 are respectively installed at the four corner positions of the lifting slide 21. The installation position of the vertical sliders 23 corresponds one-to-one with the vertical guide rails 22 on the four support columns 11, and the connection surface between the vertical sliders 23 and the lifting slide 21 is kept horizontal. After the lifting slide 21 is assembled, the four sets of vertical sliders 23 form a sliding engagement with the four sets of vertical guide rails 22, so that the lifting slide 21 is synchronously guided and constrained by the four corners during the lifting process, further reducing the offset and sway of the lifting slide 21. It is especially suitable for bearing a large material tray 60, and can effectively ensure the lifting positioning accuracy (such as the positioning error can be controlled within ±0.5mm), meeting the high requirements of the spraying industry for the transfer accuracy of the material tray 60.

[0032] like Figures 3 to 4 As shown, preferably, in order to further improve the smoothness of the operation of the lifting device 20 and avoid the deviation or jamming of the lifting slide 21 due to unilateral drive, the present invention designs the following preferred embodiment for the lifting power unit 30. The core is to achieve symmetrical drive through "transmission rod 31 + gears and racks at both ends". The specific structure and working principle are as follows: The transmission rod 31 is fitted with the bearing. The lifting slide 21 has bearing seats at both ends (the bearing seats are fixed to the lifting slide 21 by bolts). Each bearing seat is equipped with a self-aligning roller bearing. The outer ring raceway of the bearing is spherical. The inner ring is interference-fitted with the transmission rod 31 and the outer ring is interference-fitted with the bearing seat. It can automatically adapt to the angular deviation between the transmission rod 31 and the bearing seat (such as parallelism error during installation and slight deflection of the transmission rod 31 during lifting). It can effectively compensate for the influence of assembly error and running deformation on the transmission accuracy and avoid the jamming or wear caused by angular deviation of traditional deep groove ball bearings.

[0033] The axis of the transmission rod 31 is aligned with the length direction of the translational conveying device 13 (i.e., the direction of the roller axis). It is horizontally inserted through the inner ring of two self-aligning roller bearings, and its two ends extend to both sides of the lifting slide 21 (corresponding to the two sets of support components of the lifting frame 10), ensuring that the driven gears 34 at both ends can accurately engage with the rack.

[0034] Gear assembly: The drive gear 33 is fixed to the output gear of the transmission rod 31 corresponding to the motor shaft by a flat key or set screw. The drive gear 33 meshes with the power output end of the lifting motor 32 (such as the output gear on the motor shaft). When the lifting motor 32 starts, the output gear drives the drive gear 33 to rotate, thereby driving the transmission rod 31 to rotate synchronously. The first gear 35 and the second gear 36 are respectively fixed to both ends of the transmission rod 31 by a flat key connection. The number of teeth, module and tooth width of the first gear 35 and the second gear 36 are completely consistent, and their installation height is kept at the same level (to ensure that the force is balanced when meshing with the rack), forming a gear set structure with "two driven gears 34 symmetrically distributed".

[0035] Rack assembly: The first rack 38 and the second rack 39 are respectively fixed to the two sets of support components of the lifting frame 10 via guide rail seats (corresponding to the positions of the first gear 35 and the second gear 36), and meet the following installation requirements: ① The length direction of the first rack 38 and the second rack 39 is consistent with the vertical direction of the lifting frame 10, and the tooth surfaces of both are facing the driven gear 34. ② The tooth pitch and module of the first rack 38 and the second rack 39 are fully matched with the first gear 35 and the second gear 36 to ensure the smoothness of the meshing transmission; ③ The verticality deviation of the first rack 38 and the second rack 39 is controlled within 0.1 mm / m, and the parallelism deviation of their tooth surfaces is controlled within 0.05 mm, so as to avoid uneven meshing clearance at both ends due to insufficient rack parallelism.

[0036] When the lifting motor 32 drives the drive gear 33 to rotate, the transmission rod 31 drives the first gear 35 and the second gear 36 at both ends to rotate synchronously (because the transmission rod 31 is a rigid structure, the speed and direction of the two gears are completely consistent). Then, through the meshing transmission of the first gear 35 with the first rack 38 and the second gear 36 with the second rack 39, an upward or downward driving force is applied to the lifting slide 21 from both sides. Compared with the traditional single-sided gear and rack drive, this symmetrical drive method can make the force on the lifting slide 21 more balanced, and the horizontal deviation during the lifting process is controlled within ±0.2mm. It is especially suitable for scenarios where the lifting slide 21 bears a large weight (such as the total weight of the material tray 60 + workpiece ≥50kg). It can effectively avoid the accelerated wear of the linear guide rail caused by unilateral force, extend the service life of the equipment, and at the same time ensure the horizontal posture of the material tray 60 during the lifting process, preventing the workpiece in the material tray 60 from falling or shifting due to tilting. In addition, both the lifting rack 37 and the driven gear 34 adopt helical tooth structure. Helical tooth meshing can reduce transmission impact, improve transmission smoothness, further improve overall operating accuracy, reduce failure rate, and ensure production efficiency.

[0037] like Figures 4 to 6 As shown, preferably, to maximize space saving while ensuring the telescopic stroke (especially suitable for the compact layout requirements of painting workshops), the present invention designs the telescopic device 40 as a "double-layer linear guide rail module nesting" structure. Long-stroke telescopic movement is achieved through the synchronous sliding of the two layers of guide rails, while simultaneously shortening the overall length in the non-working state. The specific structure, assembly relationship, and working principle are as follows: I. Nested Assembly of Double-Layer Linear Guide Module First linear guide module (upper module): The bottom of the lifting slide 21 is provided with two parallel first sliders 43 (the sliders are fixed to the bottom surface of the lifting slide 21 by bolts). The sliding direction of the two first sliders 43 is consistent with the inflow and outflow direction of the material tray 60. The first guide rail 44 is a long strip structure, and its top surface is provided with a groove that matches the first sliders 43. The first guide rail 44 slides with the two first sliders 43 through the groove. The first guide rail 44 can slide along the sliding direction of the first sliders 43 (closer to / away from the upper line body) to form the first sliding structure of the telescopic device 40.

[0038] The second linear guide module (lower module): The bottom of the first guide rail 44 is provided with two second sliders 45 parallel to the first slider 43. The second sliders 45 are fixed to the bottom surface of the first guide rail 44 by bolts and are arranged parallel to the first sliders 43 along the inflow and outflow direction of the material tray 60 (i.e., the sliding direction of the guide rail). On the horizontal plane perpendicular to the sliding direction, the second sliders 45 and the first sliders 43 are staggered to ensure that the first guide rail 44 slides without interference and the lifting slide 21 is evenly stressed. The second guide rail 46 is also a long strip structure. Its top surface is provided with a groove that matches the second sliders 45. The second guide rail 46 slides with the two second sliders 45 through the groove. The bottom surface of the second guide rail 46 is fixed to the top of the telescopic platform 42 by bolts. The second guide rail 46 can slide along the groove direction of the second sliders 45 with the telescopic platform 42 to form the second sliding structure of the telescopic device 40.

[0039] Through the above assembly, the first guide rail 44 (upper layer) and the second guide rail 46 (lower layer) form a "nested sliding" relationship: in the non-working state, the second guide rail 46 is completely retracted to below the first guide rail 44 (the second slider 45 is located at one end of the second guide rail 46), and the first guide rail 44 is completely retracted to below the lifting slide 21 (the first slider 43 is located at one end of the first guide rail 44). At this time, the overall length of the telescopic device 40 is shortened by about 50% compared with the traditional single-layer guide rail structure, which greatly saves the horizontal space of the equipment.

[0040] Understandably, in order to optimize the sliding performance of the telescopic platform 42, a set of double-layer linear guide rail modules is set at both ends of the lifting slide 21 and the telescopic platform 42 to form a synchronous sliding structure at both ends, thereby optimizing its sliding performance.

[0041] II. Interlocking with telescopic cylinder 41 The cylinder body of the telescopic cylinder 41 is fixed to the center of the bottom of the lifting slide 21 by a bracket. The piston rod extends / retracts horizontally, and its free end is fixed to the middle crossbeam of the telescopic platform 42 by a connecting block. This layout allows the cylinder driving force to act directly on the center of the telescopic platform 42. Combined with the symmetrical double-layer linear guide rail modules on both sides, it ensures that the platform does not deflect during the telescopic process, and the levelness deviation is ≤±0.1mm.

[0042] In the retracted state: the first guide rail 44 is fully retracted to below the first slider 43 (the first slider 43 is close to the side of the lifting slide 21), and the second guide rail 46 is fully retracted to below the first guide rail 44 (the second slider 45 is close to the end side of the first guide rail 44). At this time, the lateral length of the telescopic device 40 is only "the length of the lifting slide 21 + the exposed length of the first guide rail 44 after retraction", which is about 50% shorter than the traditional single-layer guide rail, perfectly adapting to compact spaces.

[0043] Extended state: The cylinder piston rod extends, pushing the telescopic platform 42 to move outward → the second guide rail 46 slides along the second slider 45 → when the second guide rail 46 slides to its maximum stroke (the second slider 45 touches the end of the second guide rail 46), the first guide rail 44 begins to slide along the first slider 43 → finally, the two layers of guide rails are fully extended, realizing long-stroke conveying.

[0044] Compared to traditional single-layer linear guides (where the guide length in the non-working state must be equal to the maximum extension stroke to achieve the same extension stroke), the non-working length of this double-layer nested structure is only 1 / 2 of that of a single-layer structure (for example, to achieve an 800mm extension stroke, the non-working length of a single-layer guide needs to be ≥800mm, while the non-working length of a double-layer guide only needs to be ≥400mm), making it suitable for densely arranged equipment in painting workshops. At the same time, both layers of guides adopt a "double slider parallel support" structure, controlling the horizontal deviation of the telescopic platform 42 within ±0.1mm during sliding, avoiding docking deviation of the material tray 60 due to platform tilt, thus balancing space saving and operating accuracy.

[0045] like Figures 5 to 6 As shown, in a preferred embodiment, to achieve stable gripping of the "protrusion 61 perpendicular to the telescopic direction" at the bottom of the material tray 60, the present invention completes the gripping through a compound action of "cylinder-driven hook 55 translating along the telescopic direction + lifting device 20 adjusting height". The specific structure, layout and action flow are as follows: I. Adaptive Layout of Gripping Mechanism 50 and Material Tray 60 Design of protruding pillars 61 in tray 60: There are 4 cylindrical protruding pillars 61 at the bottom of tray 60 along the direction perpendicular to the extension direction (i.e. the width direction of tray 60), which are symmetrically distributed in two groups at both ends of tray 60 (2 pillars at each end, 150mm apart, 20mm in diameter and 30mm in height of the protruding pillars 61), forming a force balance structure of "double protruding pillars 61 at both ends".

[0046] Layout of gripping mechanism 50: At the bottom of the telescopic platform 42, corresponding to the positions of the protruding posts 61 at both ends of the material tray 60, there is one gripping mechanism 50 (two sets in total). Each set of mechanisms includes: Drive guide assembly: The gripping cylinder 51 (stroke 50mm) and the gripping guide rail 52 (length 80mm, parallel to the telescopic direction) are fixed parallel to each other at the bottom of the telescopic platform 42; the gripping slider 53 is slidably engaged with the gripping guide rail 52, and its bottom is connected to the gripping bracket 54 by bolts to ensure that the bracket moves smoothly along the telescopic direction (sliding gap ≤0.1mm).

[0047] The U-shaped or hook-shaped gripper 55 is designed with two U-shaped or hook-shaped claws vertically fixed to the bottom of each gripping bracket 54 (the spacing is consistent with the two protruding posts 61 at one end of the material tray 60). The opening of the claw faces the center line of the telescopic platform 42. The inner diameter of the U-shaped groove is 22mm (slightly larger than the diameter of the protruding post 61) and the depth is 25mm (less than the height of the protruding post 61), ensuring that it can both wrap the protruding post 61 and reserve lifting space.

[0048] Two-step, four-step linked capture process Step 1: Extend the grappling hook outwards to avoid the center line. After the telescopic platform 42 extends to directly above the material tray 60 via the double-layer guide rail, the piston rod of the gripping cylinder 51 extends, driving the gripping bracket 54 to move along the guide rail away from the centerline of the telescopic platform 42 (stroke 50mm), so that the opening of the U-shaped claw completely avoids the outside of the protrusion 61 (the horizontal distance between the claw and the protrusion 61 is ≥10mm), reserving space for the subsequent descent action.

[0049] Step 2: The lifting device 20 is lowered and positioned (located from the lower side). The lifting power unit 30 drives the telescopic device 40 to drop 35mm (slightly greater than the height of the protruding post 61), so that the U-shaped groove opening of the U-shaped claw faces upward, and the claw is located on the side and below the protruding post 61 (the bottom of the U-shaped groove is 5-10mm lower than the bottom of the protruding post 61).

[0050] Step 3: Retract the hook into position (directly below). The piston rod of the gripping cylinder 51 retracts, causing the gripping bracket 54 to move 50mm closer to the centerline of the telescopic platform 42, so that the U-shaped groove of the U-shaped claw is completely fitted under the protrusion 61 (the protrusion 61 is located in the center of the U-shaped groove, with a 1mm gap on both sides), thus completing the horizontal locking.

[0051] Step 4: The lifting device 20 rises and hooks up (final fixation). The lifting power unit 30 drives the telescopic device 40 to rise 30mm, and the U-shaped hooks move upward accordingly, so that the bottom of the U-shaped groove fits with the bottom of the protruding column 61. The horizontal movement of the protruding column 61 is restricted by the two side walls of the U-shaped structure, realizing "four-point synchronous hooking" (the four U-shaped hooks lock the four protruding columns 61 respectively).

[0052] III. Release Process and Technological Advantages Release action: Lifting device 20 descends 30mm (claw disengages from protrusion 61) → Piston rod of gripping cylinder 51 extends (claw expands outward to avoid) → Telescopic platform 42 drives gripping mechanism 50 to retract → Release completed.

[0053] Core advantages: ① Anti-detachment reliability: U-shaped groove full envelopment + four-point symmetrical hooking, the horizontal deviation of the material tray during the 60 transfer process is ≤±0.5mm, with no risk of detachment (traditional single hook or notched claw is prone to detachment due to vibration). ②Spatial adaptability: The hook opens and closes along the extension direction, without needing to occupy additional space perpendicular to the extension direction, making it suitable for densely arranged material trays in painting workshops. ③Motion compatibility: The motion logic is fully coordinated with that of the telescopic device 40 and the lifting device 20, and the single-cycle grasping time is ≤2 seconds, which meets the production line cycle requirements.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An improved tray transplant lifter characterized by, include: Lifting frame (10); A translational conveying device (13) is fixed to the lower part of the lifting frame (10) for receiving and temporarily storing material trays (60) from the spraying line; The lifting device (20) is connected to the lifting frame (10) and is used to drive the gripping mechanism (50) to grip the material tray (60) from the translation conveying device (13) and lift the material tray (60) upward to the upper line position; The lifting device (20) includes a lifting slide (21), a lifting power unit (30), and a telescopic device (40). The lifting slide (21) is slidably connected to the lifting frame (10); The lifting power unit (30) includes a lifting motor (32), a driving gear (33), a driven gear (34), and a lifting rack (37). The lifting rack (37) is fixed to the lifting frame (10). The driving gear (33) is rotatably connected to the lifting slide (21) and is in transmission cooperation with the power output end of the lifting motor (32). The driven gear (34) is coaxially fixed to the driving gear (33) and meshes with the lifting rack (37). The lifting motor (32) drives the driving gear (33) and the driven gear (34) to rotate synchronously, so as to drive the lifting slide (21) to rise and fall along the lifting rack (37). The telescopic device (40) includes a telescopic cylinder (41) and a telescopic platform (42). The telescopic platform (42) is slidably connected to the lifting slide (21). The telescopic cylinder (41) is fixed to the lifting slide (21), and its piston rod is connected to the telescopic platform (42) in a transmission manner to drive the telescopic platform (42) to extend and retract along the lifting slide (21). The gripping mechanism (50) is located on the telescopic platform (42). The gripping mechanism (50) is a hook-claw structure used to hook the tray (60) from the translational conveyor (13) and follow the telescopic platform (42) to extend and retract to send the tray (60) into the upper line.

2. An improved tray transfer elevator as claimed in claim 1, wherein, The lifting motor (32) is a servo motor with a braking function.

3. An improved tray transfer elevator as claimed in claim 1 wherein, The lifting frame (10) is also provided with a hard limiter (12) to limit the lifting range of the lifting slide (21).

4. An improved tray transfer elevator as claimed in claim 1 wherein, The lifting device (20) further includes a vertical guide rail (22) and a vertical slider (23); the vertical guide rail (22) is fixed to the lifting frame (10), the vertical slider (23) is fixed to the lifting slide (21), and the vertical guide rail (22) and the vertical slider (23) slide together to form a linear guide rail module, which is used to assist the lifting slide (21) in lifting along the lifting frame (10).

5. An improved tray transfer elevator as claimed in claim 1 wherein, The lifting power unit (30) also includes a transmission rod (31); the transmission rod (31) is rotatably connected to the lifting slide (21), and the driving gear (33) is fixed to the transmission rod (31); the driven gear (34) includes a first gear (35) and a second gear (36), the first gear (35) and the second gear (36) are respectively fixed to both ends of the transmission rod (31); the lifting rack (37) includes a first rack (38) and a second rack (39), the first rack (38) and the second rack (39) are respectively fixed to the lifting frame (10) at positions corresponding to the first gear (35) and the second gear (36); the first gear (35) meshes with the first rack (38), and the second gear (36) meshes with the second rack (39). When the driving gear (33) rotates, it drives the first gear (35) and the second gear (36) to rotate synchronously through the transmission rod (31) so as to drive the lifting slide (21) to lift from both ends.

6. An improved tray transfer elevator as claimed in claim 1 wherein, The telescopic device (40) also includes a first linear guide rail module and a second linear guide rail module. The first linear guide rail module includes a first slider (43) and a first guide rail (44). The second linear guide rail module includes a second slider (45) and a second guide rail (46). The first slider (43) is fixed to the bottom of the lifting slide (21), and the first guide rail (44) is slidably engaged with the first slider (43). The second slider (45) is fixed to the bottom of the first guide rail (44), and the second guide rail (46) is slidably engaged with the second slider (45). The second guide rail (46) is fixed to the top of the telescopic platform (42). The first linear guide rail module and the second linear guide rail module form a double-layer sliding mechanism to reduce the space occupied by the telescopic device (40).

7. An improved tray transfer elevator as claimed in claim 1 wherein, The gripping mechanism (50) includes a gripping cylinder (51), a gripping guide rail (52), a gripping slider (53), a gripping bracket (54), and a gripping hook (55); the gripping cylinder (51) and the gripping guide rail (52) are both fixed to the bottom of the telescopic platform (42); the gripping slider (53) is fixed to the top of the gripping bracket (54), and the gripping bracket (54) is slidably connected to the telescopic platform (42) through the gripping slider (53) and the gripping guide rail (52); one end of the gripping hook (55) is fixed to the bottom of the gripping bracket (54), and the other end is provided with a claw for hooking the protrusion (61) of the material tray (60).

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