Power supply and charger double-layer circulation aging line

Abstract

The utility model belongs to the technical field of aging test equipment, and relates to a power supply and charger double -deck circulation aging line, including frame, two -layer conveying line, upper layer tunnel box, lower layer tunnel box, circulation hot -blast mechanism, two lifting mechanisms, former transfer box body, rear transfer box body and two pairs of power supply guide rail, the utility model discloses through the butt joint intercommunication of upper layer tunnel box and lower layer tunnel box and cooperate circulation hot -blast mechanism and form closed -loop hot -blast circulation system, and the power supply guide rail is arranged in the two -layer conveying line simultaneously, and power supply piece can be continuously powered aging in two layers, and the space utilization has been improved significantly, then through containing former lifting mechanism in the top open former transfer box body, cooperate single turnover tool and can bear the design of multiple power supply piece, and operating personnel only need in the equipment front end can complete the continuous loading and unloading operation of assembly line type, and the rear operating personnel is saved, and the manpower cost and workshop space occupation are reduced, and the production efficiency and equipment utilization are improved significantly.

Description

Technical Field

[0001] This utility model belongs to the field of aging test technology and relates to a double-layer cyclic aging line for power supplies and chargers. Background Technology

[0002] Power supply aging test (also known as burn-in test) is a critical step in the production process of power supplies and chargers. Its purpose is to simulate high temperatures and harsh environments to subject power supply components to long-term power-on testing, thereby identifying early-failure products and improving product stability and reliability. Traditional aging tests use fixed aging methods, requiring manual handling and timing, resulting in low automation, low efficiency, cumbersome procedures, and the inability to detect problems promptly. Therefore, the industry has gradually developed automated aging lines.

[0003] Currently, some aging lines have adopted a double-layer conveyor structure, which has lifting mechanisms at both ends of the frame. Operators manually load the power supply components onto the turnover fixture at the lower layer at one end. The turnover fixture is automatically raised to the upper layer by the lifting mechanism for aging testing. After aging is completed, the turnover fixture is lowered to the lower layer at the other end, where the power supply components are manually removed. The empty fixture is then automatically returned to the loading end via the lower conveyor line.

[0004] Although the above solution achieves automatic jig cycling, it still has the following obvious shortcomings: 1. Because the loading and unloading operations are located at opposite ends of the equipment, aging tests can only be conducted on the upper layer, while the lower layer is only used as a return channel for the empty fixture. This results in a serious waste of space in the lower layer, and the total length of the equipment is limited by the stroke required for aging in a single layer, resulting in low space utilization. Second, although the upper and lower layers are structurally independent, the heat is concentrated in the upper layer, while the lower layer is a cold zone and does not participate in aging. Therefore, there is a significant temperature difference between the upper and lower layers, which causes the heat in the upper layer to be continuously lost to the lower layer through conduction, resulting in low thermal energy utilization and high operating energy consumption of the equipment. Third, the loading and unloading operations at both ends require reserved operating space and personnel activity areas at both ends of the equipment, which increases labor costs, limits the flexibility of equipment layout in the workshop, and results in low workshop area utilization. Utility Model Content

[0005] The purpose of this invention is to provide a double-layer cyclic aging line for power supplies and chargers, which solves the technical problems of low space utilization, high operating energy consumption, high labor costs and large space occupation in the prior art.

[0006] This utility model discloses a double-layer cyclic aging line for power supplies and chargers, comprising: frame; Two conveyor lines are arranged parallel to each other on the frame. The upper conveyor line is used to carry and transport the turnover fixture along a first direction, and is divided into an open section and a closed section along the first direction. The lower conveyor line is used to carry and transport the turnover fixture along a second direction opposite to the first direction. An upper tunnel box is located on the upper part of the frame and covers the outside of the closed section of the upper conveyor line. The bottom of the upper tunnel box is open, and it has openings at both the front and rear ends along the first direction. The lower tunnel box is located at the bottom of the frame. The lower conveyor line is housed entirely within the lower tunnel box along its length. The lower tunnel box has an open top and openings at both its front and rear ends along the second direction. The lower tunnel box is vertically connected to the upper tunnel box. A circulating hot air mechanism is installed inside the upper tunnel box to form circulating hot air between the upper tunnel box and the lower tunnel box; Two lifting mechanisms are respectively located at the front and rear ends of the frame in the longitudinal direction, and are used to transfer the turnover fixture between the upper conveyor line and the lower conveyor line; The front transfer box is located at the front end of the frame and is connected to the front opening of the lower tunnel box, with an open top. One of the lifting mechanisms is housed in the front transfer box. The rear transfer box is located at the rear end of the frame and is connected to the rear end opening of the upper tunnel box and the rear end opening of the lower tunnel box respectively, and houses another lifting mechanism inside. Two pairs of power supply rails are installed parallel to each other on the frame and are respectively arranged inside the upper conveyor line and the lower conveyor line to continuously supply power to the turnover fixtures during conveying.

[0007] This application connects the upper and lower tunnel boxes and forms a closed-loop hot air circulation system with a circulating hot air mechanism. Power supply rails are arranged in both the upper and lower conveyor lines, allowing continuous power supply for aging of the power components in both layers. This transforms the lower layer from a simple return channel into an effective aging zone, significantly improving space utilization. Furthermore, by housing the front-end lifting mechanism within the open-top front transfer box, and with a single turnover fixture capable of supporting multiple power components, operators can complete continuous loading and unloading operations at the front of the equipment, eliminating the need for back-end operators, reducing labor costs and workshop space occupancy, and significantly improving production efficiency and equipment utilization.

[0008] Based on the above technical solution, the solution of this application can be further improved as follows: Preferably, the circulating hot air mechanism includes a first circulation module and a second circulation module arranged at intervals along a first direction; The first circulation module includes a first fan and two first heating groups. The first fan is fixed to the inner top wall of the upper tunnel box and the air outlet direction is downward. The two first heating groups are respectively arranged on the lateral sides of the first fan to form a lateral circulation in the upper tunnel box. The second circulation module includes a second fan and two second heating groups. The second fan is fixed to the inner top wall of the upper tunnel box and the air outlet direction is downward. The two second heating groups are respectively arranged on both sides of the longitudinal direction of the second fan to form a longitudinal circulation in the upper tunnel box. With this solution, the product is blown by both transverse and longitudinal hot air during movement. The two circulation directions are perpendicular to each other, so that all surfaces of the power supply component can be fully contacted by hot air, effectively eliminating the temperature dead zone caused by unidirectional air supply, making the product more uniform and comprehensive in heating, and significantly improving the accuracy and consistency of aging tests.

[0009] Preferably, the first heating group includes a plurality of electric heating tubes arranged parallel to each other vertically, and each of the electric heating tubes extends longitudinally; The second heating group includes a PTC heater extending laterally and multiple axial fans. The multiple axial fans are mounted on top of the PTC heater and the airflow direction is upward. By adopting this solution, the two heating groups are designed differently in terms of heating element type, extension direction and airflow driving method, respectively adapting to lateral circulation and longitudinal circulation. This allows the power supply components to obtain stable, uniform and efficient heat supply when passing through the two circulation zones in sequence, thereby improving the uniformity of aging temperature and the consistency of testing.

[0010] Preferably, the conveyor line includes: Two supporting profiles are arranged horizontally at intervals and extend longitudinally, with movable channels formed at both the upper and lower ends of each supporting profile. Two base plates are fixedly installed between the bottom ends of the two supporting profiles, respectively; Two double-speed chains are respectively wound around the movable channels of the two supporting profiles, and the upper half of each double-speed chain is used to carry the turnover fixture. An active drive mechanism is located at one end of the two supporting profiles and is used to drive the two speed-multiplying chains to operate synchronously in a cyclic manner. The driven support mechanism is located at the other end of the two support profiles and is used to tension the two speed-multiplying chains and provide rotational support for the speed-multiplying chains. By adopting this solution, while ensuring conveying accuracy and load-bearing capacity, the bottom of the turnover fixture is suspended, which provides sufficient space for the arrangement of the power supply guide rail 9 and the vertical circulation of hot air, thus meeting the requirements of the aging line for continuous power supply and uniform heating.

[0011] Preferably, the active drive mechanism includes: Two mounting plates are respectively fixed to the outer sides of the two supporting profiles; The drive shaft has two ends that can rotatably pass through the two mounting plates. Two drive wheels are fixedly sleeved at both ends of the drive shaft and mesh with the speed-multiplying chain on the corresponding side; The drive motor is fixedly mounted on the outside of the mounting plate and is connected to the drive shaft. This solution ensures the synchronous operation of the two double-speed chains, significantly improving the smoothness and reliability of the conveying. The components do not intrude into the internal space of the conveyor line, providing ample space for the installation of the power supply rail and the circulation of hot air. The structure is simple and compact, making it easy to maintain.

[0012] Preferably, the driven support mechanism includes two driven components that correspond one-to-one with the support profile; The driven component includes: Two tension plates are detachably installed on the inner and outer sides of the corresponding support profile; The driven shaft is fixed at both ends to the two tension plates respectively; The driven wheel is rotatably mounted on the driven shaft and meshes with the speed-multiplying chain on the corresponding side. This design achieves separate tensioning and rotational support for the speed-multiplying chains on both sides, with adjustments on both sides not interfering with each other. It is also easy to adjust flexibly, facilitates later maintenance and replacement, provides a smooth rotational transition for the speed-multiplying chain, reduces running resistance, and all components are arranged at the ends of the support profile, without occupying internal space of the conveyor line.

[0013] Preferably, each of the power supply rails includes multiple collector slots that are detachably connected in sequence along the longitudinal direction; The current collector section includes: An insulating sleeve, with multiple power supply ports spaced longitudinally at its top; A conductive profile extends longitudinally and is fixedly installed inside the insulating sleeve; Multiple elastic conductive elements are longitudinally spaced on the conductive profile and correspond one-to-one with the power supply ports. Each elastic conductive element extends partially through the corresponding power supply port to the top of the insulating sleeve for elastic contact with the turnover fixture to achieve continuous power supply. This solution utilizes segmented modular design to facilitate flexible splicing according to the equipment length. A single section can be replaced independently if it fails, making maintenance convenient. It can automatically compensate for height fluctuations and operational vibrations, maintain constant contact pressure, ensure continuous and reliable sliding power supply, and enclose and isolate the live parts, exposing only the contact area, effectively ensuring safety.

[0014] Preferably, the elastic conductive element comprises: The base is mounted on the conductive profile; Two support plates are arranged horizontally opposite and vertically on the base, each support plate having a front side and a rear side opposite in the longitudinal direction; A pin is fixed between the two support plates; Two oscillating plates are arranged side by side, with one end rotatably sleeved on the pin. A conductive wheel is rotatably mounted between the other ends of the two oscillating plates; A torsion spring is movably sleeved on the pin and located between the two swing plates, with one torsion arm overlapping the front side of one of the support plates and the other torsion arm overlapping the rear side of the other support plate. This solution effectively compensates for height fluctuations and front-to-back position deviations during the operation of the turnover fixture, maintains constant contact pressure, and uses rolling contact instead of sliding friction, significantly reducing contact wear and extending service life. It also achieves the integration of mechanical fixing and electrical conduction, eliminating the need for additional wire connections, and has a compact and reliable structure.

[0015] Preferably, the lifting mechanism includes: Two shafts are set horizontally spaced and vertically. The lifting platform has two vertically sliding connections on both sides of one end along the longitudinal direction to the two shafts respectively, and the other end can dock with the two layers of the conveyor lines respectively during lifting. A belt-driven translation machine is installed on the lifting platform; The lifting drive component has its output end connected to the lifting platform. This solution ensures smooth lifting and docking accuracy while keeping the docking end unobstructed, facilitating the entry and exit of turnover fixtures. It can also directly and actively complete the translation and handover of turnover fixtures without relying on external conveying power, and the action is smooth and reliable. Moreover, the overall structure is compact, which effectively simplifies the structural layout of the loading and unloading transition area and improves the efficiency and reliability of the transfer of turnover fixtures between upper and lower layers.

[0016] Preferably, the lifting drive assembly includes: The drive cylinder is vertically positioned and located between the two shafts; A support rod extends laterally and is fixedly installed on the top of the piston rod of the drive cylinder; Two sprockets are respectively rotatably mounted on both ends of the support rod; Two chains correspond one-to-one with the sprockets. One end of each chain is fixedly connected to the bottom of the front or rear transfer box housing the lifting mechanism, and the other end is fixedly connected to the lifting platform. The chains mesh with the corresponding sprockets. This solution doubles the lifting speed, improves the cycle efficiency of transferring the turnover fixture between upper and lower levels, ensures smooth operation, has a compact overall layout, and makes full use of the internal space of the transfer box.

[0017] Through the above technical solution, this utility model achieves the following beneficial effects: 1. This application connects the upper and lower tunnel boxes and forms a closed-loop hot air circulation system with a circulating hot air mechanism. Power supply rails are arranged in both the upper and lower conveyor lines, allowing both layers to continuously supply power to the power supply components for aging. This transforms the lower layer from a simple return channel into an effective aging zone, significantly improving space utilization. Furthermore, by housing the front-end lifting mechanism in the top-open front transfer box, and with a single turnover fixture capable of carrying multiple power supply components, operators can complete continuous loading and unloading operations at the front of the equipment, eliminating the need for back-end operators, reducing labor costs and workshop space occupation, and significantly improving production efficiency and equipment utilization. 2. The circulating hot air mechanism of this application includes a first circulation module and a second circulation module arranged at intervals along a first direction. This allows the power supply components on the turnover fixture to pass through the transverse circulation zone and the longitudinal circulation zone respectively during the aging process. This allows the product to be sweeped by transverse hot air and longitudinal hot air respectively during the movement. The two circulation directions are perpendicular to each other, so that all surfaces of the power supply components can be fully contacted by hot air, effectively eliminating the temperature dead zone caused by unidirectional air supply, making the product more uniform and comprehensive in heating, and significantly improving the accuracy and consistency of aging tests. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a top perspective view of the dual-layer cyclic aging line for the power supply and charger described in the embodiments of this application; Figure 2 for Figure 1 The diagram shows the internal structure of the power supply and charger's double-layer circulating aging line after one side panel has been removed. Figure 3 for Figure 1 A bottom-view perspective view of the first cycle module in the dual-layer aging line for the power supply and charger shown. Figure 4 for Figure 1 A bottom-view perspective view of the second cycle module in the dual-layer aging line for the power supply and charger shown. Figure 5 for Figure 1 A top-view perspective view of the conveyor line in the double-layer circulating aging line for the power supply and charger shown. Figure 6 for Figure 5 A schematic diagram of the active drive mechanism in the conveyor line shown. Figure 7 for Figure 5 A schematic diagram of the driven support mechanism in the conveyor line shown. Figure 8 for Figure 1 A schematic diagram of the current collector section in the double-layer circulating aging line of the power supply and charger shown. Figure 9 for Figure 8 A magnified view of a portion of point A in the middle; Figure 10 for Figure 9 Schematic diagram of a flexible conductive component; Figure 11 for Figure 1 A schematic diagram of the lifting mechanism in the double-layer circulating aging line for the power supply and charger shown. Figure 12 for Figure 1 The diagram shows the working status of the power supply and charger's dual-layer cyclic aging line. Figure 13 This is a top perspective view of the turnover fixture described in the embodiments of this application; Figure 14 This is a bottom perspective view of the turnover fixture described in the embodiments of this application; Explanation of reference numerals in the attached figures 1. Rack; 2. Conveyor line; 2a. Upper conveyor line; 2b. Lower conveyor line; 21. Support profile; 2101. Movable channel; 22. Base plate; 23. Double-speed chain; 24. Active drive mechanism; 241. Mounting plate; 242. Drive shaft; 243. Drive wheel; 244. Drive motor; 25. Driven support mechanism; 251. Driven component; 2511. Tension plate; 2512. Driven shaft; 2513. Driven wheel; 3. Upper tunnel box; 4. Lower tunnel box; 5. Circulating hot air mechanism; 51. First circulation module; 511. First fan; 512. First heating group; 5121. Electric heating tube; 52. Second circulation module; 521. Second fan; 522. Second heating group; 5221. PTC heater; 5222. Axial flow fan; 6. Lifting mechanism; 61. Shaft; 62. Lifting platform; 63. Belt-driven translation machine; 64. Lifting drive assembly; 641. Drive cylinder; 642. Support rod; 643. Sprocket; 644. Chain; 7. Front transfer box; 8. Rear transfer container; 9. Power supply guide rail; 91. Current collector section; 911. Insulating sleeve; 91101. Power supply port; 912. Conductive profile; 913. Elastic conductive component; 9131. Base; 9132. Support plate; 9133. Pin; 9134. Swing plate; 9135. Conductive wheel; 9136. Torsion spring. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] First, it should be noted that some directional terms used in the following description to clearly illustrate the technical solution of this utility model, such as the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," are all derived from the normal orientation of the components in the double-layer cyclic aging line of the power supply and charger. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0025] Example: like Figure 1 and Figure 2As shown in the figure, this application discloses a double-layer circulating aging line for power supplies and chargers, which is used to perform automated high-temperature aging tests on power supply components such as power supplies and chargers to screen out early-failure products and improve the stability and reliability of products leaving the factory. Its specific structure includes: a frame 1, two-layer conveyor lines 2, an upper tunnel box 3, a lower tunnel box 4, a circulating hot air mechanism 5, two lifting mechanisms 6, a front transfer box 7, a rear transfer box 8, and two pairs of power supply guide rails 9.

[0026] Frame 1 is the main supporting skeleton of the equipment, serving as the foundation for the installation of all components.

[0027] Two conveyor lines 2 are arranged parallel to each other on the frame 1. The upper conveyor line 2a is used to carry and transport the turnover fixture along the first direction, and is divided into an open section and a closed section along the first direction. The open section is used for manual loading and unloading operations, while the closed section is covered by the upper tunnel box 3 and is the main aging zone. The lower conveyor line 2b is used to carry and transport the turnover fixture along the second direction opposite to the first direction, and is housed in the lower tunnel box 4. Therefore, the reflow process is also carried out in a hot environment.

[0028] The upper tunnel box 3 is located on the upper part of the frame 1 and covers the outside of the closed section of the upper conveyor line 2a, providing an insulated space. The bottom of the upper tunnel box 3 is open for docking and communication with the lower tunnel box 4, and it has openings at both the front and rear ends along the first direction for the entry and exit of turnover fixtures.

[0029] The lower tunnel box 4 is located at the bottom of the frame 1. The lower conveyor line 2b is housed entirely within the lower tunnel box 4 along its length. The top of the lower tunnel box 4 is open, which is used to turn the lower return channel into an insulated cavity, thereby performing secondary aging on the power supply components on the return fixture and making full use of the residual heat. It also has openings at both ends along the second direction for the transfer fixture to enter and exit. The lower tunnel box 4 is connected to the upper tunnel box 3 vertically, forming a complete upper and lower closed-loop air duct.

[0030] The circulating hot air mechanism 5 is installed inside the upper tunnel box 3 to form circulating hot air between the upper tunnel box 3 and the lower tunnel box 4, driving the hot air to circulate up and down.

[0031] Two lifting mechanisms 6 are respectively located at the front and rear ends of the frame 1 in the longitudinal direction, and are used to transfer the turnover fixture between the upper conveyor line 2a and the lower conveyor line 2b. The front lifting mechanism 6 lifts the turnover fixture of the aged product from the lower layer to the upper layer, so as to send it into the open section of the upper conveyor line 2a for power component replacement. The rear lifting mechanism 6 is used to lower the turnover fixture output from the closed section of the upper conveyor line 2a to the lower conveyor line 2b, so that it can be returned and continue to age.

[0032] The front transfer box 7 is located at the front end of the frame 1 and is connected to the front opening of the lower tunnel box 4. It has an open top and a lifting mechanism 6 is housed inside the front transfer box 7. It is used to provide a transition space from the lower to the upper level. Its open top is directly opposite to the open section of the upper conveyor line 2a, which facilitates the disassembly and replacement of the power supply components on the raised turnover fixture from above.

[0033] The rear transfer box 8 is located at the rear end of the frame 1 and is connected to the rear end opening of the upper tunnel box 3 and the rear end opening of the lower tunnel box 4 respectively. It also houses another lifting mechanism 6. It is used to provide a closed transition space from the upper to the lower level and to serve as the tail connection cavity of the hot air circulation loop, ensuring that the hot air will not leak at the tail due to the up and down transfer of the transfer fixture.

[0034] Two pairs of power supply guide rails 9 are installed parallel to each other on the frame 1 and are respectively arranged inside the upper conveyor line 2a and the lower conveyor line 2b. They are used to continuously supply power to the turnover fixtures during the conveying process, so that the turnover fixtures can draw power through sliding contact during movement and supply power to the power supply components on them.

[0035] It should be noted that, as Figures 12 to 14 As shown, multiple power supply components can be installed on a single turnover fixture at the same time. Therefore, power supply component replacement can be carried out in an assembly line manner in the open section of the upper conveyor line 2a. The open section provides operators with ample operating space and visibility, and multiple operating stations can be set up along the open section. Multiple operators can work together to be responsible for different processes such as loading, dispensing glue, inspection, and unloading. This breaks the limitation of the existing technology that can only be operated at fixed points at both ends, eliminates the waiting interval caused by batch processing, realizes efficient human-machine collaboration, and significantly improves the output per unit time and the overall utilization rate of equipment.

[0036] The working principle of the above technical solution is as follows: During operation, the operator loads multiple power supply components onto the turnover fixture located in the open section of the upper conveyor line 2a at the front end. Driven by the circulating hot air mechanism 5, the hot air passes through the turnover fixture and the power supply components on it from top to bottom, enters the lower tunnel box 4, and then flows back to the upper layer, forming a circulating hot air that runs through the upper and lower layers, so that the upper and lower tunnel boxes maintain a stable high-temperature aging environment. After loading, the turnover fixture is sent into the upper tunnel box 3 along the upper conveyor line 2a in the first direction. During this process, a pair of power supply rails 9 arranged inside the upper conveyor line 2a continuously supply power to the turnover fixture to ensure that the power supply components are powered on and aged while moving in the upper layer. After the upper aging process is completed, the turnover fixture enters the rear transfer box 8 and is lowered to the lower conveyor line 2b by a lifting mechanism 6. The turnover fixture flows back along the lower conveyor line 2b in the second direction. Another pair of power supply rails 9 arranged inside the lower conveyor line 2b also continuously supply power to the turnover fixture, so that the power supply components continue to be powered and aged during the lower flow process. This enables effective aging tests to be carried out on both the upper and lower layers, making full use of the equipment space and significantly improving the aging capacity. When the turnover fixture returns to the front end, it enters the front transfer box 7. Another lifting mechanism 6, housed in the front transfer box 7, lifts the turnover fixture from the lower layer to the open section of the upper conveyor line 2a. The operator removes the aged power supply component from the open section of the upper conveyor line 2a and replaces it with a new power supply component to be tested. The turnover fixture then enters the next aging cycle again. The relay power supply of the two pairs of power supply guide rails 9 ensures that the power supply component is always in a powered aging state throughout the entire conveying process, thereby realizing the assembly line-style double-layer automated aging test of the power supply component.

[0037] This invention connects the upper tunnel box 3 and the lower tunnel box 4 together with the circulating hot air mechanism 5 to form a closed-loop hot air circulation system. At the same time, power supply rails 9 are arranged in both the upper and lower conveyor lines 2, so that the power supply components can be continuously powered for aging in both layers. The lower layer is transformed from a simple return channel into an effective aging zone, which significantly improves the space utilization rate. Furthermore, by housing the front lifting mechanism 6 in the front transfer box 7 with an open top, and with the design that a single turnover fixture can carry multiple power supply components, the operator only needs to complete the assembly line-style continuous loading and unloading operation at the front of the equipment, eliminating the need for back-end operators, reducing labor costs and workshop space occupation, and significantly improving production efficiency and equipment utilization.

[0038] In some embodiments, such as Figure 1 and Figure 2 As shown, the circulating hot air mechanism 5 includes a first circulating module 51 and a second circulating module 52 arranged at intervals along a first direction.

[0039] like Figure 3 As shown, the first circulation module 51 includes a first fan 511 and two first heating groups 512. The first fan 511 is fixed to the inner top wall of the upper tunnel box 3 and the air outlet direction is downward, serving as the power source for the transverse circulation. The two first heating groups 512 are respectively arranged on the transverse sides of the first fan 511 to heat the air flowing back from both sides, so that the first fan 511 draws in hot air from the transverse sides and blows it downward, thereby forming a transverse circulation around the first fan 511, so that when the power supply unit passes through this area, the hot air mainly blows it from the transverse sides.

[0040] like Figure 4As shown, the second circulation module 52 includes a second fan 521 and two second heating groups 522. The second fan 521 is fixed to the inner top wall of the upper tunnel box 3 and the air outlet direction is downward, serving as the power source for the longitudinal circulation. The two second heating groups 522 are respectively arranged on both sides of the longitudinal direction of the second fan 521 to heat the air flowing back from both sides of the longitudinal direction, so that the second fan 521 draws in hot air from both sides of the longitudinal direction and blows it downward, forming a longitudinal circulation around the second fan 521. This allows the hot air to be blown on the power supply unit from the longitudinal direction when it enters the area.

[0041] Through the above design, the power supply components on the turnover fixture pass through the transverse circulation zone and the longitudinal circulation zone respectively during the aging process. This allows the product to be blasted by transverse and longitudinal hot air during the movement. The two circulation directions are perpendicular to each other, so that all surfaces of the power supply components can be fully contacted by hot air. This effectively eliminates the temperature dead zone caused by unidirectional air supply, making the product more evenly and comprehensively heated, and significantly improving the accuracy and consistency of aging tests.

[0042] Based on the above embodiments, such as Figure 3 As shown, the first heating group 512 includes multiple electric heating tubes 5121 arranged parallel to each other in the upper and lower parts, which are used as the heating heat source for the transverse circulation zone. Each electric heating tube 5121 extends longitudinally, so that the air flowing back from both sides in the transverse direction can fully contact and exchange heat with the electric heating tubes 5121 when passing through the first heating group 512, and ensure the uniformity of heating along the conveying direction, so as not to cause temperature fluctuations due to the movement of the fixture.

[0043] For example, the first heating group 512 also includes two L-shaped brackets. The two ends of each heating tube 5121 are fixed to the vertical sections of the two L-shaped brackets by U-shaped clips, while the horizontal sections of the L-shaped brackets are fixed to the inner top wall of the upper tunnel box 3 by bolts. This allows multiple heating tubes 5121 to be suspended inside the upper tunnel box 3, which facilitates the independent disassembly and replacement of a single heating tube 5121, reduces maintenance difficulty, and has a simple, stable, and reliable structure, while ensuring unobstructed transverse circulation air passage.

[0044] Based on the above embodiments, such as Figure 4As shown, the second heating group 522 includes a laterally extending PTC heater 5221 and multiple axial fans 5222. The PTC heater 5221 serves as the heat source for the longitudinal circulation zone and has self-regulating temperature characteristics; when the temperature is too high, the resistance increases and the power automatically decreases, making it safer to use. Its laterally extending layout adapts to the airflow direction of the longitudinal circulation. Multiple axial fans 5222 are mounted on top of the PTC heater 5221 with their air outlets facing upwards. They actively draw air upwards from below, allowing it to pass through the PTC heater 5221 and be heated. The hot air is then delivered upwards to the intake of the second fan 521. This forced airflow from the axial fans 5222 improves the circulation efficiency of the longitudinal circulation, resulting in more thorough heat exchange and a more uniform temperature distribution in the longitudinal circulation zone.

[0045] Through the above design, the two heating groups are differentiated in terms of heating element type, extension direction and airflow drive method, respectively adapting to the airflow characteristics of transverse circulation and longitudinal circulation. This ensures that the power supply can obtain stable, uniform and efficient heat supply when passing through the two circulation zones in sequence, further improving the uniformity of aging temperature and the consistency of testing.

[0046] In some embodiments, such as Figures 5 to 7 As shown, the conveyor line 2 includes: two support profiles 21, two bottom support plates 22, two double-speed chains 23, an active drive mechanism 24, and a driven support mechanism 25.

[0047] Two supporting profiles 21 are arranged in parallel along the transverse direction and extend along the longitudinal direction to form the longitudinal skeleton of the conveyor line 2. Each supporting profile 21 has a movable channel 2101 at both the upper and lower ends to accommodate the upper and lower halves of the double-speed chain 23 to circulate in it, and at the same time provide support and guidance for the upper and lower halves of the double-speed chain 23, realizing the structural integration of one profile to take care of two layers of conveying.

[0048] Two base plates 22 are fixedly installed between the bottom ends of the two support profiles 21 to connect the two support profiles 21, thereby enhancing the structural stability of the overall frame.

[0049] Two double-speed chains 23 are respectively wound around the movable channels 2101 of the two supporting profiles 21, and the upper half of each double-speed chain 23 is used to carry the turnover fixture; the double-speed chain 23 circulates in the movable channel 2101, the upper half is the carrying section, which smoothly transports the turnover fixture longitudinally; the lower half is the empty return section, which returns in the movable channel 2101. The double-speed chain 23 has a strong load-bearing capacity, which allows the turnover fixture to be directly supported above the double-speed chain 23, with the bottom suspended, which facilitates the circulation of hot air and the arrangement of the power supply rail 9.

[0050] The active drive mechanism 24 is located at one end of the two support profiles 21 and is used to drive the two double-speed chains 23 to rotate synchronously, so that the turnover fixture can move smoothly and avoid tilting or jamming due to asynchrony.

[0051] The driven support mechanism 25 is located at the other end of the two support profiles 21. It is used to tension the two double speed chains 23, prevent the double speed chains 23 from slipping due to slack, and provide rotational support for the double speed chains 23 to ensure the smoothness and reliability of the double speed chains 23 operation.

[0052] Through the above design, while ensuring conveying accuracy and load-bearing capacity, the bottom of the turnover fixture is suspended, providing ample space for the arrangement of the power supply guide rail 9 and the vertical circulation of hot air. This facilitates cooperation with the power supply guide rail 9 and the circulating hot air mechanism 5, meeting the requirements of the aging line for continuous power supply and uniform heating.

[0053] Based on the above embodiments, such as Figure 6 As shown, the active drive mechanism 24 includes: two mounting plates 241, a drive shaft 242, two drive wheels 243, and a drive motor 244.

[0054] Two mounting plates 241 are fixed to the outside of the two support profiles 21 respectively, which are used to provide mounting base and support positioning for the drive shaft 242 and drive motor 244, and at the same time transfer the overall weight and operating load of the drive mechanism 24 to the support profiles 21.

[0055] The two ends of the drive shaft 242 are rotatably connected through the two mounting plates 241 to transmit rotational power and synchronously distribute the power to the drive wheels 243 at both ends, ensuring the synchronous operation of the double-speed chains 23 on both sides.

[0056] Two drive wheels 243 are fixedly sleeved at both ends of the drive shaft 242 and mesh with the corresponding speed-multiplying chain 23; used to convert the rotational motion of the drive shaft 242 into the linear cyclic motion of the speed-multiplying chain 23.

[0057] The drive motor 244 is fixedly mounted on a mounting plate 241 and is connected to the drive shaft 242 for transmission. It is used as a power source to drive the drive shaft 242 to rotate. Its external mounting can be located outside the tunnel box, which facilitates the heat dissipation and daily maintenance of the motor, and does not intrude into the internal conveying space.

[0058] During operation, the drive motor 244 drives the drive shaft 242 to rotate, and the drive shaft 242 synchronously drives the drive wheels 243 at both ends. The drive wheels 243 drive the two double-speed chains 23 to circulate synchronously in the moving channel 2101 of the support profile 21. The upper part of the double-speed chain 23 carries the turnover fixture to move smoothly.

[0059] The above design ensures the synchronous operation of the two double-speed chains 23, significantly improving the smoothness and reliability of the conveying. The components do not intrude into the internal space of the conveyor line 2, providing ample space for the installation of the power supply rail 9 and the circulation of hot air. The structure is simple and compact, making it easy to maintain daily.

[0060] Based on the above embodiments, such as Figure 7 As shown, the driven support mechanism 25 includes two driven components 251 that correspond one-to-one with the support profile 21. Each component independently tensions and supports the speed-multiplying chain 23 on the corresponding side. The two sides can be adjusted independently without interfering with each other. The structure is highly modular and easy to maintain.

[0061] Each driven assembly 251 includes: two tension plates 2511, a driven shaft 2512, and a driven wheel 2513.

[0062] Two tension plates 2511 are detachably installed on the inner and outer sides of the corresponding support profile 21 to clamp the support profile 21, provide a stable mounting base for the driven shaft 2512, bear tensile load, and facilitate the adjustment of the tension of the double speed chain 23 by adjusting the installation position, and also facilitate maintenance and replacement.

[0063] The driven shaft 2512 is fixed at both ends to two tension plates 2511, which are used to provide fixed support for the driven wheel 2513, bear the radial load of the driven wheel 2513 and the tension of the double speed chain 23, and transmit the force to the tension plate 2511 and the support profile 21.

[0064] Driven wheel 2513 is rotatably mounted on driven shaft 2512 and meshes with the corresponding speed doubler chain 23. It serves as the passive rotating wheel of speed doubler chain 23, providing smooth rotational transition and support guidance for speed doubler chain 23, and reducing the running resistance of speed doubler chain 23.

[0065] For example, the support profile 21 has a strip hole through which the driven shaft 2512 passes, so that the two tension plates 2511 can be installed as a whole against the side of the support profile 21 without extending outward. This results in more direct force application, stronger load-bearing capacity, a compact structure, and convenient adjustment.

[0066] Through the above design, the tensioning and rotation support of the two double-speed chains 23 on both sides are realized, the adjustment on both sides does not interfere with each other, and the tension of the double-speed chains 23 can be flexibly adjusted, which is convenient for later maintenance and replacement. It also provides a smooth rotation transition for the double-speed chains 23, reducing running resistance. Moreover, all components are arranged at the end of the support profile 21, without occupying the internal space of the conveyor line 2.

[0067] In some embodiments, such as Figure 8As shown, each power supply rail 9 includes multiple longitudinally detachably connected current collection slot sections 91. Its segmented design facilitates manufacturing, transportation and assembly, and can be replaced individually when a section fails, reducing maintenance costs.

[0068] The current collector section 91 includes an insulating sleeve 911, a conductive profile 912, and multiple elastic conductive elements 913.

[0069] The top of the insulating sleeve 911 has multiple power supply ports 91101 spaced longitudinally, which are used to provide electrical insulation protection, isolate the live parts from the outside, and expose the contact part of the elastic conductive element 913 only through the power supply ports 91101, thereby improving safety.

[0070] The conductive profile 912 extends longitudinally and is fixedly installed inside the insulating sleeve 911. It serves as a conductive backbone to introduce external power and distribute it longitudinally to each elastic conductive element 913, thereby providing a unified conductive path for multiple turnover fixtures to draw power simultaneously.

[0071] Multiple elastic conductive elements 913 are installed longitudinally at intervals on the conductive profile 912 and correspond one-to-one with the power supply port 91101. Each elastic conductive element 913 extends partially through the corresponding power supply port 91101 to the top of the insulating sleeve 911 for elastic contact with the turnover fixture to achieve continuous power supply. It can automatically compensate for height differences and running vibrations, maintain constant contact pressure, and ensure continuous power supply.

[0072] Multiple collector sections 91 are longitudinally connected and assembled to form a complete power supply rail 9. External power is distributed longitudinally to each elastic conductive element 913 via conductive profiles 912 within each section. The elastic conductive element 913 extends through a power supply port 91101 at the top of the insulating sleeve 911. When the turnover fixture moves upward with the conveyor line 2, the power-collecting strip at the bottom of the turnover fixture contacts and conducts electricity with the elastic conductive element 913, thereby achieving sliding contact power collection. The elastic structure of the elastic conductive element 913 can automatically compensate for height fluctuations and running vibrations of the turnover fixture, maintaining constant contact pressure and ensuring continuous and reliable power supply.

[0073] Through the above design, the segmented modular design allows for flexible splicing according to the length of the equipment. A single faulty segment can be replaced independently, making maintenance convenient. The elastic conductive component 913 automatically compensates for height fluctuations and operational vibrations, maintaining constant contact pressure and ensuring continuous and reliable sliding power supply. Furthermore, the insulating sleeve 911 wraps and isolates the live parts, exposing only the contact area, effectively ensuring safety.

[0074] In this embodiment, as Figure 10 As shown, the elastic conductive element 913 includes: a base 9131, two support plates 9132, a pin 9133, two swing plates 9134, a conductive wheel 9135, and a torsion spring 9136.

[0075] The base 9131 is mounted on the conductive profile 912 to fix the elastic conductive element 913 on the conductive profile 912 and to achieve electrical connection with it, so as to conduct current from the conductive profile 912 to each component.

[0076] Two support plates 9132 are arranged horizontally opposite to each other and vertically on the base 9131. Each support plate 9132 has a front side and a rear side opposite to each other in the longitudinal direction, which are used to provide fixed support for the pin 9133 and to provide an overlapping positioning reference for the two torsion arms of the torsion spring 9136.

[0077] The pin 9133 is fixed between the two support plates 9132, which provides hinge support for the swing of the swing plate 9134 and provides a mounting position for the torsion spring 9136.

[0078] Two oscillating plates 9134 are arranged side by side, with one end rotatably sleeved on the pin 9133. They are used to drive the conductive wheel 9135 to oscillate in the vertical plane, so as to realize the adaptive adjustment of the height of the conductive wheel 9135.

[0079] The conductive wheel 9135 is rotatably mounted between the other ends of the two swing plates 9134; its function is to convert sliding friction into rolling friction, make rolling contact with the power strip at the bottom of the turnover fixture to conduct electricity, transmit current to the power supply component on the turnover fixture, reduce contact wear, and improve service life.

[0080] The torsion spring 9136 is movably sleeved on the pin 9133 and located between the two swing plates 9134. One torsion arm overlaps the front side of one support plate 9132, and the other torsion arm overlaps the rear side of another support plate 9132 to provide bidirectional reset elastic force.

[0081] Understandably, when the conductive wheel 9135 is compressed, causing the two oscillating plates 9134 to swing forward, the torsion arm overlapping the front side will be compressed and store energy by one of the oscillating plates 9134; when the conductive wheel 9135 is compressed, causing the two oscillating plates 9134 to swing backward, the torsion arm overlapping the rear side will be compressed and store energy by the other oscillating plate 9134. After the external force is removed, the torsion spring 9136 releases its elastic force to drive the oscillating plates 9134 and the conductive wheel 9135 back to the upright state, ensuring that the conductive wheel 9135 abuts against the power strip of the turnover fixture with a constant contact pressure.

[0082] When the turnover jig passes by, the power-taking strip at the bottom of the turnover jig presses down on the conductive wheel 9135. The conductive wheel 9135 and the swing plate 9134 swing forward or backward around the pin 9133. The swing plate 9134 compresses the torsion arm on the corresponding side, and the torsion spring 9136 stores energy and provides a reverse elastic contact force, so that the conductive wheel 9135 always keeps in close contact with the power-taking strip. The rolling contact method of the conductive wheel 9135 reduces friction, and the bidirectional reset structure of the torsion spring 9136 allows the conductive wheel 9135 to be effectively buffered and reset regardless of whether it is subjected to forward or backward thrust, compensating for height fluctuations and position deviations during the operation of the turnover jig, and ensuring continuous and stable power supply. The installation of the base 9131 and the conductive profile 912 achieves electrical conduction. The current is conducted through the base 9131, support plate 9132, pin 9133, and swing plate 9134 to the conductive wheel 9135, and finally delivered to the power supply component on the turnover jig.

[0083] The above design effectively compensates for height fluctuations and front-to-back position deviations during the operation of the turnover fixture, maintains constant contact pressure, and uses rolling contact instead of sliding friction, which significantly reduces contact wear, extends service life, and achieves integration of mechanical fixing and electrical conduction without the need for additional wire connections, resulting in a compact and reliable structure.

[0084] In some implementations, such as Figure 11 As shown, the lifting mechanism 6 includes: two shafts 61, a lifting platform 62, a belt-driven translation machine 63, and a lifting drive assembly 64.

[0085] Two shafts 61 are set horizontally spaced and vertically to serve as vertical guide rails, ensuring that the lifting platform 62 maintains a horizontal posture during lifting and bearing the off-center load torque, thus ensuring the smoothness of the lifting movement and the docking accuracy.

[0086] The lifting platform 62 is vertically slidably connected to two shafts 61 on both sides of one end along the longitudinal direction, and the other end can dock with the two layers of conveyor lines 2 respectively when lifting. It is used to carry the turnover fixture and is lifted and lowered under the drive of the lifting drive assembly 64, and docks with the conveyor line 2 through the cantilever end.

[0087] The belt-type translation machine 63 is installed on the lifting platform 62. After the lifting platform 62 is connected to the conveyor line 2, it actively moves the turnover fixture on the lifting platform 62 into the conveyor line 2, or moves the turnover fixture on the conveyor line 2 into the lifting platform 62, so that the handover of the turnover fixture between the two is more reliable.

[0088] The output end of the lifting drive component 64 is connected to the lifting platform 62 for transmission, and is used to provide lifting power to the lifting platform 62 to drive it to lift to a specified height, so as to ensure the accurate docking of the conveyor line 2.

[0089] During operation, the lifting drive assembly 64 drives the lifting platform 62 to rise and fall vertically along the two shafts 61, ensuring accurate docking of the cantilevered end of the lifting platform 62 with the upper or lower conveyor line 2. After docking, the belt-driven translation machine 63 on the lifting platform 62 starts, actively feeding the turnover fixture on the lifting platform 62 into the conveyor line 2, or pulling the turnover fixture from the conveyor line 2 into the lifting platform 62, completing the smooth handover of the turnover fixture. The dual shafts 61 guide ensure a smooth and non-skewed lifting process. The lifting platform 62 has its own translation drive and does not rely on the power of the conveyor line 2, resulting in smooth and reliable operation.

[0090] Through the above design, while ensuring smooth lifting and docking accuracy, the docking end is unobstructed, which facilitates the entry and exit of turnover fixtures. It can also directly and actively complete the horizontal transfer and handover of turnover fixtures without relying on external conveying power, and the action connection is smooth and reliable. Moreover, the overall structure is compact, which effectively simplifies the structural layout of the loading and unloading transition area and improves the efficiency and reliability of the transfer between upper and lower layers of turnover fixtures.

[0091] In this embodiment, as Figure 11 As shown, the lifting drive assembly 64 includes: a drive cylinder 641, a support rod 642, two sprockets 643, and two chains 644.

[0092] The drive cylinder 641 is used to provide lifting driving force. Through the extension and retraction of the piston rod, it drives the support rod 642 and the sprocket 643 to lift synchronously. Its vertical arrangement makes the force direction consistent with the lifting direction, the force transmission is direct, and it is located between the two shafts 61 without occupying external space.

[0093] The support rod 642 extends laterally and is fixedly installed on the top of the piston rod of the drive cylinder 641. It is used to transmit the linear motion of the drive cylinder 641 to the sprockets 643 on both sides laterally, so that the sprockets 643 on both sides rise and fall synchronously, while bearing the tensile load transmitted by the chain 644.

[0094] Two sprockets 643 are respectively rotatably mounted on both ends of the support rod 642 for engaging with the chain 644. Thus, when the sprockets 643 rise with the piston rod, the sprockets 643 rotate and push one end of the chain 644 upward, while the other end pulls the lifting platform 62 upward at twice the speed.

[0095] Two chains 644 correspond one-to-one with sprockets 643. One end of each chain 644 is fixedly connected to the bottom of the front transfer box 7 or the rear transfer box 8 that houses the lifting mechanism 6, and the other end is fixedly connected to the lifting platform 62. The chain 644 meshes with the corresponding sprocket 643. It is used to transmit driving force and achieves the effect of a movable pulley through the sprocket 643. It converts the thrust of the drive cylinder 641 into the lifting motion of the lifting platform 62 and doubles the stroke, making the lifting platform 62 lift faster and with a larger stroke.

[0096] When the piston rod of the drive cylinder 641 extends, it pushes the support rod 642 and the sprockets 643 at both ends to rise synchronously. Since one end of the chain 644 is fixed to the bottom of the transfer box, the sprocket 643 rolls on the fixed end when it rises. The chain 644 passes around the other end of the sprocket 643 and pulls the lifting platform 62 upward at twice the speed and distance of the piston rod stroke, thus doubling the stroke. Similarly, when the piston rod retracts, the lifting platform 62 descends under the action of gravity.

[0097] The above design doubles the lifting speed, improves the cycle efficiency of transferring the turnover fixture between upper and lower layers, and ensures smooth operation. The overall layout is compact and makes full use of the internal space of the transfer box.

[0098] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0099] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A power supply and charger dual layer cycle aging line, characterized in that, include: frame; Two conveyor lines are arranged parallel to each other on the frame. The upper conveyor line is used to carry and transport the turnover fixture along a first direction, and is divided into an open section and a closed section along the first direction. The lower conveyor line is used to carry and transport the turnover fixture along a second direction opposite to the first direction. An upper tunnel box is located on the upper part of the frame and covers the outside of the closed section of the upper conveyor line. The bottom of the upper tunnel box is open, and it has openings at both the front and rear ends along the first direction. The lower tunnel box is located at the bottom of the frame. The lower conveyor line is housed entirely within the lower tunnel box along its length. The lower tunnel box has an open top and openings at both its front and rear ends along the second direction. The lower tunnel box is vertically connected to the upper tunnel box. A circulating hot air mechanism is installed inside the upper tunnel box to form circulating hot air between the upper tunnel box and the lower tunnel box; Two lifting mechanisms are respectively located at the front and rear ends of the frame in the longitudinal direction, and are used to transfer the turnover fixture between the upper conveyor line and the lower conveyor line; The front transfer box is located at the front end of the frame and is connected to the front opening of the lower tunnel box, with an open top. One of the lifting mechanisms is housed in the front transfer box. The rear transfer box is located at the rear end of the frame and is connected to the rear end opening of the upper tunnel box and the rear end opening of the lower tunnel box respectively, and houses another lifting mechanism inside. Two pairs of power supply rails are installed parallel to each other on the frame and are respectively arranged inside the upper conveyor line and the lower conveyor line to continuously supply power to the turnover fixtures during conveying.

2. The power supply and charger dual cycle burn-in line of claim 1, wherein, The circulating hot air mechanism includes a first circulating module and a second circulating module arranged at intervals along a first direction. The first circulation module includes a first fan and two first heating groups. The first fan is fixed to the inner top wall of the upper tunnel box and the air outlet direction is downward. The two first heating groups are respectively arranged on the lateral sides of the first fan to form a lateral circulation in the upper tunnel box. The second circulation module includes a second fan and two second heating groups. The second fan is fixed to the inner top wall of the upper tunnel box and the air outlet direction is downward. The two second heating groups are respectively arranged on both sides of the longitudinal direction of the second fan to form a longitudinal circulation in the upper tunnel box.

3. The double-layer cyclic aging line for power supply and charger according to claim 2, characterized in that, The first heating group includes multiple electric heating tubes arranged parallel to each other vertically, and each of the electric heating tubes extends longitudinally. The second heating group includes a PTC heater extending laterally and a plurality of axial fans, the plurality of axial fans being mounted on top of the PTC heater and having an upward airflow direction.

4. The power supply and charger dual cycle burn-in line of claim 1, wherein, The conveyor line includes: Two supporting profiles are arranged horizontally at intervals and extend longitudinally, with movable channels formed at both the upper and lower ends of each supporting profile. Two base plates are fixedly installed between the bottom ends of the two supporting profiles, respectively; Two double-speed chains are respectively wound around the movable channels of the two supporting profiles, and the upper half of each double-speed chain is used to carry the turnover fixture. An active drive mechanism is located at one end of the two supporting profiles and is used to drive the two speed-multiplying chains to operate synchronously in a cyclic manner. A driven support mechanism is located at the other end of the two support profiles to tension the two speed-multiplying chains and provide rotational support for the speed-multiplying chains.

5. The power supply and charger dual cycle burn-in line of claim 4, wherein, The active drive mechanism includes: Two mounting plates are respectively fixed to the outer sides of the two supporting profiles; The drive shaft has two ends that can rotatably pass through the two mounting plates. Two drive wheels are fixedly sleeved at both ends of the drive shaft and mesh with the speed-multiplying chain on the corresponding side; The drive motor is fixedly mounted on the outside of one of the mounting plates and is connected to the drive shaft via a transmission.

6. The power supply and charger dual cycle burn-in line of claim 4, wherein, The driven support mechanism includes two driven components that correspond one-to-one with the support profile; The driven component includes: Two tension plates are detachably installed on the inner and outer sides of the corresponding support profile; The driven shaft is fixed at both ends to the two tension plates respectively; The driven wheel is rotatably mounted on the driven shaft and meshes with the speed-multiplying chain on the corresponding side.

7. The power supply and charger dual tier cycle burn-in line of claim 1, wherein, Each of the power supply rails includes multiple collector slots that are detachably connected in sequence along the longitudinal direction; The current collector section includes: An insulating sleeve, with multiple power supply ports spaced longitudinally at its top; A conductive profile extends longitudinally and is fixedly installed inside the insulating sleeve; Multiple elastic conductive elements are installed longitudinally at intervals on the conductive profile and correspond one-to-one with the power supply port. Each elastic conductive element extends partially through the corresponding power supply port to the top of the insulating sleeve for elastic contact with the turnover fixture to achieve continuous power supply.

8. The power supply and charger dual cycle aging line of claim 7, wherein, The elastic conductive element includes: A base is mounted on the conductive profile. Two support plates are arranged horizontally opposite and vertically on the base, each support plate having a front side and a rear side opposite in the longitudinal direction; A pin is fixed between the two support plates; Two oscillating plates are arranged side by side, with one end rotatably sleeved on the pin. A conductive wheel is rotatably mounted between the other ends of the two oscillating plates; A torsion spring is movably sleeved on the pin and located between the two swing plates, with one torsion arm overlapping the front side of one of the support plates and the other torsion arm overlapping the rear side of the other support plate.

9. The power supply and charger dual cycle burn-in line of claim 1, wherein, The lifting mechanism includes: Two shafts are set horizontally spaced and vertically. The lifting platform has two vertically sliding connections on both sides of one end along the longitudinal direction to the two shafts respectively, and the other end can dock with the two layers of the conveyor lines respectively during lifting. A belt-driven translation machine is installed on the lifting platform; The lifting drive assembly has its output end connected to the lifting platform via a transmission connection.

10. The power supply and charger dual cycle burn-in line of claim 9, wherein, The lifting drive component includes: The drive cylinder is vertically positioned and located between the two shafts; A support rod extends laterally and is fixedly installed on the top of the piston rod of the drive cylinder; Two sprockets are respectively rotatably mounted on both ends of the support rod; Two chains correspond one-to-one with the sprockets. One end of each chain is fixedly connected to the bottom of the front or rear transfer box housing the lifting mechanism, and the other end is fixedly connected to the lifting platform. The chains mesh with the corresponding sprockets.

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